JP6441155B2 - Wiper device - Google Patents

Description

  The present invention relates to a wiper device including a wiper blade for wiping a wiping surface.

  A vehicle such as an automobile is provided with a wiper device that ensures visibility of a driver or the like. The wiper device includes a wiper arm that is swung by an electric motor, and a wiper blade that is attached to the wiper arm. When the wiper switch in the passenger compartment is turned on, the wiper arm is swung, whereby the blade rubber reciprocates on the wiping surface, and rainwater or the like adhering to the wiping surface is wiped off.

  By the way, when a deposit such as dust adheres to the wiping surface, the wiper blade is reciprocated while spraying the cleaning liquid onto the wiping surface. Thereby, it is possible to wipe cleanly without damaging the wiping surface by moistening an adhering matter such as dust. Usually, the cleaning liquid is sprayed onto the wiping surface from a nozzle unit installed in a hood or the like of the vehicle. In this case, the cleaning liquid injection position is in front of the driver's eyes and obstructs the field of view. Since a large amount of cleaning liquid is used, there is a disadvantage that the frequency of supplying the cleaning liquid to the tank is increased.

  Therefore, in order to eliminate such drawbacks, for example, a wiper device as shown in Patent Document 1 has been developed. The wiper device described in Patent Document 1 includes an arm support (arm head) fixed to a swing shaft (output shaft), an arm shank rotatably connected to the arm support, and a tip end side of the arm shank. It has a washer nozzle (nozzle unit) provided and a flexible hose (pipe) provided between the washer nozzle portion and the swing shaft portion. Further, the swing shaft side of the flexible hose is arranged around the swing shaft so as not to contact the swing shaft and not to protrude from the arm support.

  And the washing | cleaning liquid supplied to the flexible hose is sprayed from a washer nozzle, and reaches | attains on the wiping surface near immediately. Accordingly, the distance between the washer nozzle and the wiping surface can be shortened to prevent the cleaning liquid spraying position from being greatly displaced due to traveling wind or the like, and the vicinity of the blade rubber can be wetted. Therefore, the wiping surface can be wiped with a small amount of cleaning liquid.

JP 2010-030373 A

  However, according to the wiper device described in Patent Document 1 described above, the swinging shaft side of the pipe approaches or moves away from the swinging shaft when the arm head swings. In particular, when the pipe approaches the swing shaft, tension is applied to the pipe. As a result, problems such as early deterioration of the piping and an increased load on the electric motor may occur.

  Further, if the cleaning liquid is sprayed individually in the respective wiping directions for the wiping operation toward the forward path side and the wiping operation toward the backward path side of the wiper device, the wiping surface can be wiped with a smaller amount of cleaning liquid. In this case, piping is required on each of the forward path side and the return path side. Therefore, if the wiper device described in Patent Document 1 described above is provided with a pair of pipes on the forward path side and the return path side, not only will the load on the electric motor be further increased, but also the fixed part of the arm head with respect to the swing shaft Problems such as an increase in size may occur.

  An object of the present invention is to provide a wiper device that can suppress an increase in the size of a fixed portion with respect to a swing shaft of an arm head while suppressing a tension from acting on an outward path side pipe and a return path side pipe.

In one aspect of the present invention, a wiper device including a wiper blade for wiping a wiping surface, an arm head having a shaft fixing portion fixed to a swing shaft at one end, and the other end of the arm head An arm shank with one end attached to the part and the wiper blade attached to the other end, a nozzle unit provided on the arm shank or the wiper blade, for spraying a cleaning liquid toward the wiping surface, and the arm A head side pipe housing part provided along the longitudinal direction of the head and opened toward the wiping surface side, and a forward path side housed in the head side pipe housing part and having a tip side connected to the nozzle unit A proximal end side of the forward path side pipe and the backward path side pipe are arranged in the axial direction of the swing shaft at one end of the arm head, and It passes next to the shaft fixing portion, without along the curved profile of the shaft fixing portion, and its curvature so as to curved in the opposite direction, pulled out to the outside from the head-side pipe receiving portion It is.

  In another aspect of the present invention, a holding hole is provided at one end of the arm head to hold the forward path side pipe and the return path side pipe side by side in the axial direction of the swing shaft.

  In another aspect of the present invention, a guide for causing the forward-side piping and the return-side piping along the outer periphery of the shaft fixing portion at one end of the arm head to swing in one direction of the shaft fixing portion. A wall is provided.

  In another aspect of the present invention, the forward-side pipe and the return-side pipe each include an upstream pipe and a downstream pipe, and a connection member that connects the upstream pipe and the downstream pipe is provided in the head-side pipe housing portion. .

In another aspect of the present invention, the arm shank, provided we are along the longitudinal direction thereof, are opened toward the wiping surface, the shank-side pipe accommodating portion for accommodating the forward pipe and the return pipe Is provided.

  In another aspect of the present invention, one end portion of the arm shank is provided rotatably with respect to the other end portion of the arm head via a rotation shaft extending in a direction intersecting with the swing shaft, The forward path side pipe and the return path side pipe are arranged in the wiping direction of the wiper blade at the rotating shaft portion.

  According to the present invention, the proximal end sides of the forward path side piping and the return path side piping are arranged in the axial direction of the swing shaft at one end portion of the arm head and are curved toward the opposite side to the shaft fixing portion side. It is pulled out from the head side pipe housing part. As a result, when the arm head is swung, the proximal end side of the forward path side pipe and the return path side pipe are wound around the shaft fixing portion without applying a load to the swing shaft. At this time, no tension is applied to the forward-side piping and the backward-side piping, and the forward-side piping and the backward-side piping and the shaft fixing portion do not rub against each other, so that deterioration of the forward-side piping and the backward-side piping is suppressed. The

  In addition, since the proximal end side of the forward path side pipe and the return path side pipe are arranged in the axial direction of the swing shaft, when the forward path side pipe and the return path side pipe are wound around the shaft fixing part, the shaft fixing part Swelling to the outer side in the radial direction is suppressed. Therefore, an increase in the size of the fixed portion with respect to the swing shaft of the arm head is suppressed.

It is a perspective view which shows the wiper apparatus of this invention. It is the expansion perspective view which looked at the circumference of a nozzle unit from the front side. It is the expansion perspective view which looked at the circumference of a nozzle unit from the back side. It is sectional drawing which follows the AA line of FIG. It is sectional drawing which follows the BB line of FIG. It is the perspective view which looked at the wiper arm from the back side. It is the perspective view which looked at the axial fixed part periphery of an arm head from the front side. It is sectional drawing which follows the CC line of FIG. It is the perspective view which looked at the axial fixing | fixed part periphery of an arm head from the back side. (A) is a figure corresponding to FIG. 10 (a) which shows the D arrow line view of FIG. 9, and (b) shows the modification of a holding hole. (A), (b) is explanatory drawing explaining the state of each piping wound around a shaft fixing | fixed part. FIG. 6 is a perspective view showing a wiper side connection member of a second embodiment. FIG. 6 is a perspective view showing a wiper side connection member of a third embodiment. FIG. 10 is a perspective view showing a wiper side connection member of a fourth embodiment.

  Hereinafter, Embodiment 1 of the present invention will be described in detail with reference to the drawings.

  1 is a perspective view showing the wiper device of the present invention, FIG. 2 is an enlarged perspective view of the periphery of the nozzle unit as viewed from the front side, and FIG. 3 is an enlarged perspective view of the periphery of the nozzle unit as viewed from the back side. 1 is a sectional view taken along line AA in FIG. 1, FIG. 5 is a sectional view taken along line BB in FIG. 2, and FIG. 6 is a perspective view of the wiper arm as viewed from the back side.

  As shown in FIG. 1, the wiper device 10 includes a wiper blade 20 and a wiper arm 30. The wiper blade 20 is rotatably mounted on the distal end side of the wiper arm 30 and slidably contacts the windshield (wiping surface) 11 on the front side of a vehicle such as an automobile. The base end side of the wiper arm 30 is attached to the swing shaft PS on the front side of the vehicle. Then, by turning on a wiper switch (not shown) in the passenger compartment to rotate a wiper motor (not shown), the swing shaft PS is swung. As a result, the wiper device 10 performs a reciprocating wiping operation for a predetermined wiping range AR formed on the windshield 11 toward the forward path and the backward path as indicated by arrows in the drawing.

  As shown in FIGS. 1 to 5, the wiper blade 20 includes a blade rubber 21 that comes into contact with the windshield 11, a holder member 22 that holds the blade rubber 21, and a coupling provided in the middle portion in the longitudinal direction of the holder member 22. Part 23. A pair of end caps CP are attached to both end portions of the holder member 22 in the longitudinal direction. As a result, the blade rubber 21 held by the holder member 22 is prevented from coming off.

  As shown in FIGS. 4 and 5, the blade rubber 21 connects the main body 21 a held by the holder member 22, the lip 21 b in contact with the windshield 11, and the main body 21 a and the lip 21 b. And a neck portion 21c. The blade rubber 21 is formed in an elongated shape by extruding an elastic material such as rubber, and the cross-sectional shape thereof is uniform throughout the entire length direction.

  The thickness dimension of the neck portion 21c along the operation direction (the left-right direction in the drawing) of the blade rubber 21 is set to be thinner than the thickness dimensions of the main body portion 21a and the lip portion 21b, and is easily elastically deformed. Accordingly, when the wiper blade 20 moves on the forward path side and the backward path side on the windshield 11, the inclination of the lip portion 21b is allowed, and the tip portion of the lip portion 21b smoothly follows the moving direction of the wiper blade 20. It can be done. Accordingly, it is possible to reliably wipe off deposits (not shown) such as rainwater and dust attached to the windshield 11.

  As shown in FIG. 4, the holder member 22 includes a holder main body 22a and a fin portion 22b. The holder main body 22 a and the fin portion 22 b are integrated by two-color molding of dissimilar materials having different hardnesses, and are formed long like the blade rubber 21.

  The holder main body 22a is made of a flexible plastic or the like so as to be able to follow the curved shape (not shown) of the windshield 11 while ensuring sufficient strength to hold the main body 21a of the blade rubber 21. It is made of a resin material. On the other hand, the fin portion 22b is formed of an elastic material such as rubber having a hardness lower than that of the holder body 22a. When the traveling wind hits the fin portion 22b, down force is generated in the wiper blade 20, and thus the wiping performance of the blade rubber 21 is kept good.

  Inside the holder main body 22a, a pair of vertebras 22c are provided at a predetermined interval. Each of the vertebras 22c is formed of a steel plate having a spring property, and is arranged so as to be mirror-symmetrical so as to sandwich the main body portion 21a of the blade rubber 21 from the forward path side and the backward path side. In a natural state in which no external force is applied, each vertical bra 22c is curved with a curvature larger than that of the windshield 11, and elastically deforms the holder member 22 and the blade rubber 21 in accordance with the curvature of the windshield 11. It is like that. Thereby, the whole area along the longitudinal direction of the lip portion 21 b is brought into close contact with the windshield 11.

  As shown in FIGS. 1 and 5, a connecting portion 23 is provided in the middle portion of the holder member 22 in the longitudinal direction. The connecting portion 23 includes a connecting main body 23a, a base plate 23b, and a cover member 23c. The connection main body 23a is formed in a substantially U-shaped cross section by pressing a steel plate or the like, and is fixed to each of the vertebras 22c by a fixed leg portion (not shown) provided integrally.

  A cylindrical pin 23d made of steel is caulked and fixed to the coupling body 23a, and a hook fixing member 23e formed of a resin material such as plastic is rotatably attached to the cylindrical pin 23d. Here, an arm piece 60 (see FIG. 2) fixed to the distal end side of the wiper arm 30 is connected to the hook fixing member 23e by one touch. The cylindrical pin 23d and the hook fixing member 23e also constitute the connecting portion 23.

  The base plate 23b is formed in a plate shape by a resin material such as plastic, and the base plate 23b is attached to each vertebra 22c by a fixed leg portion 23f provided integrally. Here, the connection main body 23 a is disposed on the fin portion 22 b side (front side) of the holder member 22, and the base plate 23 b is disposed on the holder main body 22 a side (back side) of the holder member 22.

  The cover member 23c is formed in a substantially box shape from a resin material such as plastic, and is attached to the outside of the connection body 23a by a plurality of integrally provided engaging claws (not shown). The cover member 23c covers the side surface portion and the like of the connecting body 23a, thereby improving the appearance of the wiper blade 20.

  As shown in FIGS. 1 and 6, the wiper arm 30 includes an arm head 40, an arm shank 50, and an arm piece 60.

  7 is a perspective view of the periphery of the shaft fixing portion of the arm head as viewed from the front side, FIG. 8 is a cross-sectional view taken along the line CC of FIG. 7, and FIG. FIG. 10 (a) is a perspective view of FIG. 9D, FIG. 10 (b) is a view corresponding to FIG. 10 (a) showing a modification of the holding hole, and FIG. 11 (a) and FIG. Explanatory drawing explaining the state of each piping wound around a shaft fixing part is shown, respectively.

  As shown in FIGS. 6, 7 and 9, the arm head 40 is formed in a rod shape by casting or molding aluminum material. The arm head 40 includes a head main body 41 that is curved in a substantially J shape, a shaft fixing portion 42 that is provided at one end (right side in the figure) of the head main body 41 and is fixed to the swing shaft PS, and the head main body 41. , And a shank mounting portion 43 to which one end portion of the arm shank 50 is mounted.

  As shown in FIGS. 6 and 9, the head main body 41 is provided on the windshield 11 side (the front side in the drawing) with a head side pipe accommodating portion 41 a that opens toward the windshield 11 side. The head side pipe accommodating portion 41 a is provided over the entire length of the arm head 40 in accordance with the shape of the arm head 40. Thereby, the cross-sectional shape along the short direction of the arm head 40 is formed in a substantially U shape.

  An outward path washer tube (outward path side piping) 44 and a backward path side washer tube (return path side piping) 45 are accommodated inside the head side piping accommodating portion 41a. Here, in order to make the arrangement structure of the washer tubes 44 and 45 easy to understand, the washer tubes 44 and 45 are shaded in the drawing.

  As shown by the broken line arrows in FIGS. 1, 7 and 9, the washer tubes 44 and 45 are respectively supplied with a forward-side washer liquid (cleaning liquid) W1 and a backward-side washer liquid (cleaning liquid) W2 from a not-shown washer pump. Supplied. Here, a vehicle body side connection member CJ fixed to the vehicle body BD (see FIG. 1) is connected to the base end side of each of the washer tubes 44, 45, and each washer tube 44, A washer pump is connected to the side opposite to the 45 side via a pair of washer tubes (not shown).

  The washer tubes 44 and 45 are for feeding the respective washer liquids W1 and W2 to a nozzle unit 70 described later. As shown in FIGS. 6 and 9, the forward pass washer tube 44 is formed of a vehicle side tube (upstream piping) 44a and a nozzle side tube (downstream piping) 44b. The return side washer tube 45 is formed of a vehicle side tube (upstream piping) 45a and a nozzle side tube (downstream piping) 45b.

  The vehicle-side tube 44a and the nozzle-side tube 44b, and the vehicle-side tube 45a and the nozzle-side tube 45b are connected to each other by a wiper-side connecting member (connecting member) 46 fixed inside the head-side pipe accommodating portion 41a. .

  As shown in FIG. 8, flow paths 46 a and 46 b through which the respective washer liquids W <b> 1 and W <b> 2 circulate are formed inside the wiper side connection member 46. The wiper side connection member 46 is integrally provided with a first engagement claw 46c and a second engagement claw 46d so as to face each other with the pair of flow paths 46a and 46b interposed therebetween. The first engaging claw 46c having a large protruding height is engaged with the engaging recess 41c provided on the side wall 41b on the return path side (right side in the drawing) of the head main body 41, and the second engaging claw having a small protruding height. The joint claw 46d is engaged with an engagement recess 41e provided on the side wall 41d on the forward path side (left side in the figure) of the head main body 41.

  Here, in order to fix the wiper side connection member 46 to the inside of the head side pipe housing part 41a, first, the wiper side connection member 46 is inclined to the head side pipe housing part 41a, and in this state. Originally, the first engagement claw 46c is engaged with the engagement recess 41c. Next, the wiper side connecting member 46 is in a parallel state with respect to the head side pipe accommodating portion 41a, and the second engaging claw 46d is engaged with the engaging recess 41e. Thereby, the wiper side connecting member 46 is fixed without rattling inside the head side pipe accommodating part 41a.

  In this way, by fixing the wiper side connecting member 46 inside the head side pipe accommodating portion 41a, the washer tubes 44 and 45 are prevented from loosening in the arm head 40 portion. Further, the vehicle side tubes 44a and 45a and the nozzle side tubes 44b and 45b are divided by dividing the wiper side connection member 46 into the vehicle side tubes 44a and 45a and the nozzle side tubes 44b and 45b. The arm head 40 and the arm shank 50 can be easily assembled. Furthermore, for example, even when tension (tension) is applied to the nozzle side tubes 44b and 45b, it is possible to prevent the tension from being applied to the vehicle side tubes 44a and 45a.

  As shown in FIGS. 7 and 9, the base end side of each of the washer tubes 44 and 45 housed in the head side pipe housing portion 41a, that is, each of the vehicle side tubes 44a and 45a is positioned away from the shaft fixing portion 42. The arm head 40 is pulled out to the outside. Specifically, the vehicle-side tubes 44a and 45a are drawn out from the head-side pipe housing portion 41a while being arranged in the axial direction of the swing shaft PS.

  As shown in FIG. 10A, a holding hole 42 a formed in a substantially vertically long rectangular shape is formed on a part of the periphery of the shaft fixing portion 42 of the arm head 40 and on the return path side of the arm head 40. Is provided. The holding hole 42a is formed by cutting out a part of the side wall 41b on the return path side (left side in the figure) of the head body 41, and the holding hole 42a has a holding hole on the windshield 11 side (lower side in the figure). A bridging portion 42b that forms 42a is provided. The vehicle-side tubes 44a and 45a are inserted into the holding holes 42a, and the holding holes 42a are arranged in a state where the vehicle-side tubes 44a and 45a are arranged in the axial direction of the swing shaft PS (see FIGS. 7 and 9). keeping.

  Here, as shown to Fig.10 (a), the width dimension of the holding hole 42a is taken as a dimension larger than the diameter dimension of each vehicle side tube 44a, 45a. Accordingly, a clearance S is formed between the holding hole 42a and each of the vehicle side tubes 44a and 45a in a state where the respective vehicle side tubes 44a and 45a are brought close to the shaft fixing portion 42 side. Therefore, when the wiper device 10 is assembled, the vehicle side tubes 44a and 45a can be easily inserted into the holding holes 42a.

  However, as shown in FIG. 10B, an opening 42d can be provided in the bridging portion 42b, and the vehicle side tubes 44a and 45a can be arranged in the holding hole 42a via the opening 42d. In this case, the width dimension t of the opening 42d is set to facilitate the disposition of the vehicle side tubes 44a and 45a in the holding holes 42a and to prevent the vehicle side tubes 44a and 45a from falling out of the holding holes 42a. It is set slightly smaller than the diameter dimension d of each of the vehicle side tubes 44a and 45a (t <d). Further, the opening 42d is provided with a tapered surface TS for facilitating the arrangement of the vehicle side tubes 44a and 45a in the holding hole 42a.

  As described above, by holding the vehicle side tubes 44a and 45a in the holding holes 42a in a state of being arranged in the axial direction of the swing shaft PS, it is ensured that the arrangement of the vehicle side tubes 44a and 45a is shifted. To be prevented. Moreover, the periphery of the shaft fixing portion 42 in the arm head 40 is prevented from being widened and enlarged. Further, when the arm head 40 is swung, the vehicle side tubes 44a and 45a are wound around the shaft fixing portion 42 with the same radius of curvature as shown in FIG. That is, the load on the electric motor is reduced.

  As shown in FIG. 7, a guide wall 42 c protruding radially outward of the shaft fixing portion 42 is integrally formed on the opposite side (upper side in the drawing) of the shaft fixing portion 42 along the axial direction. Is provided. The guide wall 42c extends along a plane orthogonal to the axial direction of the swing axis PS, and protrudes on the side opposite to the arm shank 50 side (right side in the drawing) of the arm head 40. As a result, when the wiper device 10 is assembled, when the vehicle side tubes 44a and 45a are inserted into the holding holes 42a, the guide wall 42c is used as a guide, and the wiper device 10 can be easily assembled.

  As shown in FIG. 11, the guide wall 42c guides the vehicle side tubes 44a and 45a to be wound around the shaft fixing portion 42 in an orderly manner when the arm head 40 swings in one direction. It is. That is, the guide wall 42 c has a function of causing the vehicle side tubes 44 a and 45 a to follow the outer periphery of the shaft fixing portion 42. This reliably prevents the vehicle-side tubes 44a and 45a from being displaced while the vehicle-side tubes 44a and 45a are wound around the shaft fixing portion 42.

  Each of the vehicle side tubes 44a and 45a is pulled out from the head side pipe accommodating portion 41a through the holding hole 42a. The portions pulled out of the vehicle side tubes 44a and 45a are shown in FIGS. And as shown in FIG. 11, it curves toward the opposite side to the axis | shaft fixing | fixed part 42 side. That is, as shown in FIG. 11A, the vehicle side tubes 44a and 45a are not wound around the shaft fixing portion 42 when the wiper device 10 is stopped. Further, as shown in FIGS. 9 and 11, the shaft fixing portion 42 is formed in a substantially cylindrical shape, and the curvature radius R1 at the curved portion of each vehicle side tube 44a, 45a is equal to the radius R2 of the shaft fixing portion 42. They are set to substantially the same value (R1≈R2). Thereby, when each vehicle side tube 44a, 45a is wound in contact with the substantially cylindrical outer peripheral surface of the shaft fixing portion 42, the central axis and the shaft fixing portion of the curved portion of each vehicle side tube 44a, 45a are wound. The center axis of 42 is coaxial. Therefore, when each of the vehicle side tubes 44a and 45a is wound around the shaft fixing portion 42 or separated from the shaft fixing portion 42, it is prevented that the vehicle side tubes 44a and 45a are greatly deformed beyond the curvature radius R1 and the radius R2.

  Here, the winding operation of each of the vehicle side tubes 44a and 45a by the shaft fixing portion 42 will be described with reference to FIG.

  When the wiper switch is turned on to rotate the wiper motor, the swing shaft PS is swung. Then, the wiper apparatus 10 starts the wiping operation from the stop state shown in FIG. Specifically, the arm head 40 swings toward the forward path side about the swing axis PS. Thereby, the wiper apparatus 10 changes from the state shown in FIG. 11A to the state shown in FIG.

  At this time, each of the vehicle side tubes 44a and 45a moves as indicated by a broken line arrow M in FIG. 11B, and gradually winds around the shaft fixing portion 42 as the shaft fixing portion 42 swings. It will be. At this time, each of the vehicle side tubes 44a and 45a is curved toward the side opposite to the shaft fixing portion 42 side, and the curvature radius R1 at the curved portion is substantially the same value as the radius R2 of the shaft fixing portion 42. Therefore, an unreasonable load (large tension) is not applied to the vehicle side tubes 44a and 45a. More specifically, after each vehicle side tube 44a, 45a is extended to the opposite side to the arm shank 50 side of the arm head 40, it is curved toward the opposite side to the shaft fixing portion 42 side, and thereafter Further, it extends in a direction approaching the shaft fixing portion 42. That is, the vehicle body side connection member CJ (see FIG. 1) side of each of the vehicle side tubes 44 a and 45 a is U-turned after returning from the shaft fixing portion 42 and returned to the shaft fixing portion 42.

  Therefore, when the wiper device 10 is operated, the vehicle side tubes 44a and 45a that are deformed each time are prevented from being deteriorated at an early stage. Furthermore, since the load on the wiper motor is reduced, the smooth operation of the wiper device 10 is realized.

  When the wiper device 10 performs the wiping operation on the return path side, the vehicle side tubes 44a and 45a wound around the shaft fixing portion 42 are gradually separated from the shaft fixing portion 42, contrary to the above. Each vehicle side tube 44a and 45a will be in the state shown to Fig.11 (a). Even in this case, an excessive load is not applied to each of the vehicle side tubes 44a and 45a, and the load on the wiper motor is reduced.

  As shown in FIG. 6, the shank mounting portion 43 is provided with a support pin (rotating shaft) 43 a that rotatably supports one end portion of the arm shank 50. The support pin 43a is formed of a columnar steel material and extends in a direction intersecting with the extending direction of the swing shaft PS. As a result, the arm shank 50 is pivotably connected to the arm head 40 without rattling, and can be easily locked back.

  7 and 9, the shank mounting portion 43 is provided with a pair of pin mounting walls 43b and 43c, and a hook FK is provided between these pin mounting walls 43b and 43c. A hook pin 43d to be hooked is provided. The hook pin 43d extends in the same direction as the support pin 43a and is formed of a columnar steel material like the support pin 43a.

  Here, one pin mounting wall 43 c of the pair of pin mounting walls 43 b and 43 c is disposed at a substantially central portion along the short direction of the arm head 40. As a result, the spring SP hooked on the hook FK is arranged close to one side (lower side in the figure) along the short direction of the arm shank 50. Thus, the hook pin 43d supports the end of the spring SP via the hook FK.

  Then, the arm shank 50 side of each washer tube 44, 45 accommodated in the head side pipe accommodating portion 41a, that is, each nozzle side tube 44b, 45b is located from the position avoiding one pin mounting wall 43c of the arm head 40. It is pulled out outside. Specifically, each of the nozzle side tubes 44b and 45b accommodated in the head side pipe accommodating portion 41a is arranged in the axial direction of the support pin 43a, that is, the wiper blade 20 (see FIG. 1) in a portion where the support pin 43a is present. Under the state of being arranged in the wiping direction, it is pulled out from the head side pipe housing part 41a.

  Thereby, as shown in FIG. 6 and FIG. 9, the nozzle side tubes 44 b and 45 b can be arranged close to the other side (upper side in the drawing) along the short direction of the arm shank 50. Further, when the arm shank 50 is locked back with respect to the arm head 40, each nozzle side tube 44b, 45b is deformed with the same curvature radius, so that substantially the same load is applied to both the nozzle side tubes 44b, 45b. Can be hung. Thereby, it is possible to suppress the occurrence of problems such as the early deterioration of one of the nozzle side tubes 44b and 45b.

  As shown in FIG. 6, the arm shank 50 is formed in a substantially U-shaped cross section by pressing a steel plate or the like, and is formed in a substantially straight long rod shape. One end portion (right side in the figure) of the arm shank 50 is rotatably attached to the shank attachment portion 43 of the arm head 40, and the arm piece 60 is attached to the other end portion (left side in the figure) of the arm shank 50. A wiper blade 20 (see FIG. 1) is attached. Here, in the present embodiment, the wiper blade 20 is attached to the other end portion of the arm shank 50 via the arm piece 60. However, in the present invention, the wiper blade 20 is attached to the other end portion of the arm shank 50. A direct mounting form is also included. In other words, a form in which the wiper blade fixing portion formed in the same shape as the arm piece 60 is integrally provided at the other end portion of the arm shank 50 is also included.

  A nozzle unit 70 that injects each of the washer liquids W1 and W2 (see FIG. 3) toward the windshield 11 is mounted on the other end side along the longitudinal direction of the arm shank 50, that is, on the front end side of the wiper arm 30. ing.

  The arm shank 50 includes a bottom wall 51 and a pair of side walls 52 a and 52 b erected substantially perpendicular to the bottom wall 51. A portion surrounded by the bottom wall 51 and the pair of side walls 52 a and 52 b serves as a shank side pipe housing portion 53. Each of the nozzle side tubes 44 b and 45 b is accommodated in the shank side pipe accommodating portion 53, and the shank side pipe accommodating portion 53 is connected to a head side pipe accommodating portion 41 a provided in the arm head 40. That is, the shank side pipe accommodating portion 53 is provided along the longitudinal direction of the arm shank 50 and is opened toward the windshield 11.

  Moreover, the spring SP is accommodated in the shank side piping accommodating part 53 so that it may be parallel to each nozzle side tube 44b, 45b. The spring SP generates an elastic force that presses the wiper blade 20 toward the windshield 11.

  As shown in FIG. 6, a projecting piece 52 c is provided on one end side along the longitudinal direction of the arm shank 50, that is, on the base end side of the wiper arm 30. The protruding piece 52c is integrally provided on the side wall 52b on the return path side of the arm shank 50 when the arm shank 50 is pressed. Thereby, the protrusion piece 52c protrudes in the wiping direction from the side wall 52b to the outward path side of the wiper blade 20 (see FIG. 1).

  The protruding piece 52c faces the hook FK from the short direction of the arm shank 50, and the protruding piece 52c is provided at a position corresponding to one end side of the spring SP in the arm shank 50, that is, near one end side of the spring SP. It has been. The projecting piece 52c, together with one pin mounting wall 43c, brings the nozzle side tubes 44b and 45b together, and the nozzle side tubes 44b and 45b on the other side along the short direction of the arm shank 50 (see FIG. (Middle left upper side)

  Thus, the protruding piece 52c holds the nozzle side tubes 44b and 45b in parallel with the spring SP on one end side of the spring SP together with the one pin mounting wall 43c. Moreover, in the said part, each nozzle side tube 44b, 45b is arrange | positioned away from the side part of the spring SP so that it may be in a non-contact state with respect to the spring SP. Therefore, each nozzle side tube 44b, 45b and the spring SP are not rubbed.

  As shown in FIG. 6, a support piece 52 d and a first holder 54 attached to the support piece 52 d are provided at a substantially central portion along the longitudinal direction of the arm shank 50. The support piece 52d is provided integrally with the side wall 52a when the arm shank 50 is pressed, and protrudes from the side wall 52a in the wiping direction toward the return path side of the wiper blade 20 (see FIG. 1). The other end of the spring SP is hooked on the support piece 52d.

  Thus, one end side of the spring SP is hooked on the hook pin 43d of the arm head 40 via the hook FK, and the other end side of the spring SP is hooked on the support piece 52d of the arm shank 50. Thereby, the elastic force of the spring SP acts to press the wiper blade 20 toward the windshield 11 (see FIG. 1).

  The first holder 54 attached to the support piece 52d is formed in a predetermined shape from a resin material such as plastic. The first holder 54 is provided with a protruding piece 54a that protrudes toward the side wall 52b and a protruding piece 54b that protrudes toward the bottom wall 51. Then, the nozzle-side tubes 44b and 45b are arranged close to the side wall 52b side and the bottom wall 51 side by the protruding pieces 54a and 54b.

  The support piece 52d and the first holder 54 are provided at a position corresponding to the other end side of the spring SP in the arm shank 50, that is, in the vicinity of the other end side of the spring SP. That is, the support piece 52d and the first holder 54 hold the nozzle side tubes 44b and 45b in parallel with the spring SP on the other end side of the spring SP. Moreover, in the said part, each nozzle side tube 44b, 45b is arrange | positioned away from the side part of the spring SP so that it may be in a non-contact state with respect to the spring SP. Therefore, each nozzle side tube 44b, 45b and the spring SP are not rubbed.

  Here, the distance between the position where the projecting piece 52c and one pin mounting wall 43c are arranged and the position where the support piece 52d and the first holder 54 are arranged is substantially the same as the length dimension of the spring SP. It is said. Further, the length of the spring SP is approximately one third of the length of the arm shank 50. Thereby, each nozzle side tube 44b, 45b can be arrange | positioned in parallel with respect to the spring SP in the non-contact state separated from the spring SP, and each nozzle side tube 44b, 45b is loosened. Further, it is possible to prevent the shank side pipe housing portion 53 from protruding outside.

  Between the first holder 54 and the nozzle unit 70 along the longitudinal direction of the arm shank 50, a support piece 52e (not shown in detail) and a second holder 55 attached to the support piece 52e are provided. Yes. The support piece 52e and the second holder 55 are disposed at a substantially intermediate portion between the first holder 54 and the nozzle unit 70 along the longitudinal direction of the arm shank 50.

  Similarly to the support piece 52d, the support piece 52e is provided integrally with the side wall 52a when the arm shank 50 is pressed, and protrudes from the side wall 52a in the wiping direction toward the return path side of the wiper blade 20 (see FIG. 1). ing. On the other hand, the second holder 55 attached to the support piece 52e is formed in a substantially rectangular parallelepiped shape by a resin material such as plastic, and includes a support surface 55a facing the bottom wall 51. The nozzle side tubes 44 b and 45 b are pressed against the bottom wall 51 by the support surface 55 a of the second holder 55.

  As a result, the length of the spring SP is substantially the same between the second holder 55 and the first holder 54 and between the second holder 55 and the nozzle unit 70, and the protruding piece 52c and the first holder As with the holder 54, the nozzle side tubes 44b and 45b are prevented from loosening and protruding from the shank side pipe accommodating portion 53 to the outside.

  As shown in FIG. 6, the arm piece 60 fixed to the distal end side of the arm shank 50 is formed in a predetermined shape by pressing a steel material or the like. The distal end side of the arm piece 60 is formed in a substantially U shape. The distal end portion of the arm piece 60 is connected to the hook fixing member 23e (see FIG. 5) by one touch. Further, the proximal end side of the arm piece 60 is fixed to the inside of the distal end portion of the arm shank 50 by a pair of rivets R (see FIG. 2). Thus, the arm shank 50 made of a steel plate and the arm piece 60 made of a steel material are riveted to each other so that they are firmly fixed without rattling.

  The nozzle unit 70 is fixed to the arm piece 60 by a fixing screw SC (see FIG. 6). Here, the fixing screw SC is screwed into the screw hole HL shown in FIG. 2 from the lower side in the drawing, that is, from the wiper blade 20 side. A part of the arm piece 60 and the nozzle unit 70 including the screw hole HL is covered with the distal end side of the arm shank 50. Thereby, the periphery of the nozzle unit 70 of the wiper device 10 is cleaned to improve the appearance.

  Thus, by fixing the nozzle unit 70 to the arm piece 60 attached to the hook fixing member 23e, the nozzle unit 70 is disposed close to the hook fixing member 23e. Further, the nozzle unit 70 is firmly fixed to the arm piece 60 with the fixing screw SC in the vicinity of the hook fixing member 23e. Therefore, the displacement of the nozzle unit 70 with respect to the wiper blade 20 is minimized.

  As shown in FIGS. 2 and 3, the nozzle unit 70 is formed by injection molding a resin material such as plastic, so that the cross-sectional shape in the direction (short direction) intersecting the longitudinal direction of the arm shank 50 is substantially U-shaped. It is formed into a shape. The nozzle unit 70 includes an outward path side block 71 and a return path side block 72.

  On the proximal end side of the outward path block 71, an outward path first wall portion 71 a directed to the longitudinal direction proximal end side of the wiper blade 20 is provided. The other end side of the nozzle side tube 44 b is connected to the forward side first wall 71 a side of the forward side block 71. On the other hand, on the distal end side of the outbound path side block 71, an outbound path side arm portion 71b that gradually becomes tapered toward the distal end side is integrally provided. The forward path side arm portion 71b is provided with a forward path side second wall portion 71c directed to the distal end side in the longitudinal direction of the wiper blade 20.

  Further, an outward facing surface 71 d that faces the windshield 11 is formed between the outward first wall 71 a and the outward second wall 71 c of the outward block 71. A forward-side nozzle cap 71e is provided in a portion of the forward-side facing surface 71d near the outward-path second wall portion 71c.

  The forward path side second wall portion 71c is provided with the forward path side first injection nozzle A1. The forward path side first injection nozzle A <b> 1 is directed to the front end side in the longitudinal direction of the wiper blade 20. As a result, during the outward wiping operation of the wiper blade 20, the wiper blade 20 is wetted on the front end side in the longitudinal direction and on the forward windshield 11 (see FIG. 1).

  Here, the outward-path-side first injection nozzle A1 employs an eyeball type nozzle in which the injection position of the outward-path washer liquid W1 is variable. Specifically, the injection position of the outward path side first injection nozzle A1 can be adjusted by turning the nozzle with a wire or the like. Thereby, the injection position of the forward path side first injection nozzle A1 can be optimized in accordance with specifications such as the difference in length of the wiper blade 20 attached to the wiper arm 30.

  The forward path side nozzle cap 71e is provided with the forward path side second injection nozzle B1 and the forward path side third injection nozzle C1. In these forward path side second injection nozzles B1 and forward path side third injection nozzles C1, the injection position of the forward path side washer liquid W1 is a fixed nozzle. The forward-side washer fluid W1 ejected from the forward-side second injection nozzle B1 and the outward-side third injection nozzle C1 wets the outward side in the vicinity of the longitudinal center of the blade rubber 21. .

  The forward path side first wall 71a is provided with a forward path side fourth injection nozzle D1. This forward path side fourth injection nozzle D <b> 1 is directed to the longitudinal base end side of the wiper blade 20. As a result, when the wiper blade 20 performs the outward path wiping operation, the wiper blade 20 is wetted on the longitudinal direction proximal end side and on the forward windshield 11 (see FIG. 1).

  Here, also in the forward path side fourth injection nozzle D1, an eyeball type nozzle in which the injection position of the forward path side washer liquid W1 is variable is adopted, similarly to the forward path side first injection nozzle A1. Therefore, according to the specification of the wiper blade 20, the injection position of the forward path side fourth injection nozzle D1 can be optimized.

  On the proximal end side of the return path side block 72, a return path side first wall portion 72 a directed to the longitudinal direction proximal end side of the wiper blade 20 is provided. The other end side of the nozzle side tube 45b is connected to the return side first wall portion 72a side of the return side block 72. On the other hand, on the distal end side of the return path side block 72, a return path arm portion 72b that gradually becomes tapered toward the distal end side is integrally provided. The return path side arm portion 72b is provided with a return path side second wall portion 72c directed to the distal end side in the longitudinal direction of the wiper blade 20. Here, the length dimension of the return path side arm part 72b is shorter than the length dimension of the forward path side arm part 71b.

  A return-side facing surface 72 d that faces the windshield 11 is formed between the return-side first wall 72 a and the return-side second wall 72 c of the return-side block 72. A return-side nozzle cap 72e is provided on a portion of the return-side facing surface 72d near the return-side first wall 72a.

  A return-side first injection nozzle E1 is provided on the return-side second wall 72c. The return side first injection nozzle E <b> 1 is directed to the front end side in the longitudinal direction of the wiper blade 20. As a result, when the wiper blade 20 performs the return path side wiping operation, the wiper blade 20 is wetted on the front end side in the longitudinal direction and on the windshield 11 on the return path side (see FIG. 1).

  Here, the return-side first injection nozzle E1 employs an eyeball type nozzle in which the injection position of the return-side washer liquid W2 is variable. Specifically, the injection position can be adjusted in the same manner as the forward path side first injection nozzle A1 described above. Accordingly, the injection position of the return-side first injection nozzle E1 can be optimized in accordance with specifications such as the difference in length of the wiper blade 20 attached to the wiper arm 30.

  The return-side nozzle cap 72e is provided with a return-side second injection nozzle F1. In the return-side second injection nozzle F1, the injection position of the return-side washer fluid W2 is a fixed nozzle. The return-side washer fluid W2 ejected from the return-side second injection nozzle F1 wets the return-path side in the vicinity of the central portion in the longitudinal direction of the blade rubber 21.

  A return-side third injection nozzle G1 is provided on the return-side first wall portion 72a. The return side third injection nozzle G <b> 1 is directed to the base end side in the longitudinal direction of the wiper blade 20. As a result, when the wiper blade 20 performs the return path side wiping operation, the wiper blade 20 is wetted on the proximal end in the longitudinal direction and on the windshield 11 on the return path side (see FIG. 1).

  Here, in the return-side third injection nozzle G1, as in the return-side first injection nozzle E1, an eyeball type nozzle in which the injection position of the return-side washer liquid W2 is variable is adopted. Therefore, according to the specification of the wiper blade 20, it is possible to optimize the injection position of the return side third injection nozzle G1.

  In the present embodiment, the forward-side washer liquid W1 is sprayed to the windshield 11 by the forward-side injection nozzles A1 to D1, and the return-side washer liquid W2 is winded by the backward-side injection nozzles E1 to G1. The injection position with respect to the shield 11 is adjusted according to the following criteria.

  Here, if the spray positions of the washer fluids W1 and W2 are close to the blade rubber 21, the sprayed washer fluids W1 and W2 will not hinder the visibility of the driver or the like. W1 and W2 are wiped off immediately after injection. For this reason, dust or the like adhering to the windshield 11 is not melted and left unwiped (deterioration in cleaning properties).

  On the other hand, if the spray positions of the washer liquids W1 and W2 are moved away from the blade rubber 21, the dust attached to the windshield 11 is surely melted and wiped cleanly with no wiping residue left. However, the sprayed washer liquids W1 and W2 hinder the visibility of the driver or the like (visibility inhibition).

  Accordingly, the peripheral speed of the blade rubber 21 is set to [v], the melting time of the deposits is set to [t], and the distance from the blade rubber 21 to the injection position of each of the washer liquids W1, W2, that is, the injection distance is set to [L]. , The injection distance [L] is adjusted so as to satisfy the equation [L = v × t]. As a result, it is possible to achieve a balance between the contradictory phenomena of improving the cleaning property of the deposit and suppressing the visual field inhibition. In the present embodiment, the injection distance [L] is about 15 mm.

  However, the peripheral speed [v] of the blade rubber 21 includes the peripheral speed [v1] on the distal end side (outer peripheral side) of the blade rubber 21 and the peripheral speed [v2] on the base end side (inner peripheral side) of the blade rubber 21. (V1> v2), the average value of the peripheral speed [v1] and the peripheral speed [v2] is used. The peripheral speed [v] is usually the moving speed of the blade rubber 21 at the time of [Low] operation of a frequently used wiper switch.

  Next, how the forward pass washer fluid W1 and the backward pass washer fluid W2 flow will be described with reference to the drawings.

  By operating a washer switch (not shown), a washer pump (not shown) is driven, and each of the washer liquids W1 and W2 is sent to the forward side washer tube 44 and the backward side washer tube as shown by the broken arrows in FIG. 45 respectively. Then, as shown in FIG. 3, the washer liquids W <b> 1 and W <b> 2 enter the forward block 71 and the backward block 72, respectively. As a result, as shown by the broken-line arrows in FIG. 3, the washer liquids W1 and W2 are respectively ejected from the forward-side injection nozzles A1 to D1 and the backward-side injection nozzles E1 to G1.

  Here, the driving direction of the washer pump is switched according to the switching of the moving direction of the blade rubber 21. More specifically, during the wiping operation of the wiper blade 20 toward the forward path, the forward path washer fluid W1 is supplied only to the forward path block 71. On the other hand, during the wiping operation of the wiper blade 20 toward the return path, the return path washer liquid W2 is supplied only to the return path block 72.

  As described above in detail, according to the wiper device 10 according to the present embodiment, the proximal end sides of the forward pass washer tube 44 and the return pass washer tube 45 are in the axial direction of the swing shaft PS at one end of the arm head 40. Are pulled out from the head side pipe accommodating part 41a so as to bend toward the opposite side to the shaft fixing part 42 side. Thereby, when the arm head 40 is swung, the base end side of each of the washer tubes 44 and 45 is wound around the shaft fixing portion 42 without applying a load to the swing shaft PS. At this time, no tension acts on the washer tubes 44 and 45, and the washer tubes 44 and 45 and the shaft fixing portion 42 do not rub against each other, so that the deterioration of the washer tubes 44 and 45 is suppressed.

  Further, since the base end sides of the washer tubes 44 and 45 are arranged in the axial direction of the swing shaft PS, when the washer tubes 44 and 45 are wound around the shaft fixing portion 42, the shaft fixing portion The bulging outward in the radial direction around 42 is suppressed. Therefore, an increase in the size of the fixed portion of the arm head 40 with respect to the swing axis PS is suppressed.

  Furthermore, according to the wiper device 10 according to the present embodiment, the holding holes 42a for holding the washer tubes 44 and 45 side by side in the axial direction of the swing shaft PS are provided at one end of the arm head 40. When the swing shaft PS swings, it is possible to reliably prevent the vehicle-side tubes 44a and 45a from being displaced.

  Further, according to the wiper device 10 according to the present embodiment, the washer tubes 44 and 45 are attached to one end portion of the arm head 40 in one direction of the shaft fixing portion 42. Since the guide wall 42c is provided along the outer periphery, it is possible to reliably prevent the disposition of the washer tubes 44 and 45 while the washer tubes 44 and 45 are wound around the shaft fixing portion 42.

  Further, according to the wiper device 10 according to the present embodiment, the washer tubes 44 and 45 include the vehicle side tubes 44a and 45a and the nozzle side tubes 44b and 45b, respectively. A wiper side connection member 46 is provided for connecting the tubes 44a and 45a and the nozzle side tubes 44b and 45b, respectively.

  As a result, the washer tubes 44 and 45 can be prevented from loosening in the arm head 40 portion. Further, the washer tubes 44 and 45 can be easily assembled to the arm head 40 and the arm shank 50. Further, for example, even when a tension acts on each nozzle side tube 44b, 45b, the tension can be prevented from acting on each vehicle side tube 44a, 45a.

  Furthermore, according to the wiper device 10 according to the present embodiment, the arm shank 50 is extended along the longitudinal direction thereof, opened toward the windshield 11, and accommodates the washer tubes 44 and 45. A shank side pipe accommodating portion 53 is provided. Thereby, it is not necessary to expose the washer tubes 44 and 45 to the outside of the wiper arm 30, and the appearance of the wiper device 10 can be improved.

  Further, according to the wiper device 10 according to the present embodiment, one end portion of the arm shank 50 is connected to the other end portion of the arm head 40 via the support pin 43a extending in a direction intersecting the swing axis PS. The washer tubes 44 and 45 are rotatably provided, and are arranged in the wiping direction of the wiper blade 20 at the support pin 43a. Thereby, when the arm shank 50 is locked back with respect to the arm head 40, substantially the same load can be applied to both the washer tubes 44 and 45. Therefore, it is possible to suppress the occurrence of problems such as the early deterioration of one of the washer tubes 44 and 45.

  Next, Embodiment 2 of the present invention will be described in detail with reference to the drawings. Note that parts having the same functions as those of the first embodiment described above are denoted by the same reference numerals, and detailed description thereof is omitted.

  FIG. 12 is a perspective view showing the wiper side connecting member of the second embodiment.

  As shown in FIG. 12, the second embodiment is different from the first embodiment only in the structure of the wiper side connection member (connection member) 80. Specifically, the first elastic claw 81 and the second elastic claw 82 are integrated with the wiper-side connection member 80 so as to face each other with a pair of flow paths (not shown) provided inside the wiper side connection member 80 therebetween. Provided. The first elastic claw 81 and the second elastic claw 82 are elastically deformed in the direction by applying a force in a direction approaching each other. The first elastic claw 81 is engaged with the engagement recess 41 c provided on the side wall 41 b of the head main body 41, and the second elastic claw 82 is engaged with the engagement recess 41 e provided on the side wall 41 d of the head main body 41. Is done.

  In the second embodiment formed as described above, the same operational effects as those of the first embodiment described above can be obtained. In addition, in the second embodiment, the first elastic claw 81 and the second elastic claw 82 can be elastically deformed in a direction approaching each other, so that the first elastic claw 81 and the second elastic claw 82 are shown in FIG. The claw 81 and the second elastic claw 82 can be simultaneously engaged with the engagement recess 41c and the engagement recess 41e, respectively. Therefore, the wiper side connection member 80 can be mounted in a parallel state with respect to the head side pipe housing portion 41a, and assembling workability of the wiper device 10 is improved.

  Next, Embodiment 3 of the present invention will be described in detail with reference to the drawings. Note that parts having the same functions as those of the first embodiment described above are denoted by the same reference numerals, and detailed description thereof is omitted.

  FIG. 13 is a perspective view showing the wiper side connecting member of the third embodiment.

  As shown in FIG. 13, the third embodiment is different from the first embodiment only in the structure for fixing the wiper side connection member (connection member) 90 to the arm head 40. Specifically, the head-side pipe accommodating portion 41a of the arm head 40 is provided with a cylindrical projection 91 that protrudes toward the opening side (upper side in the drawing) of the head-side pipe accommodating portion 41a. In addition, a pair of cutout portions 92 (only one is shown in the drawing) are provided on the distal end side of the cylindrical protrusion 91 so as to extend in the longitudinal direction of the arm head 40.

  On the other hand, the wiper side connection member 90 is formed with a guide recess 93 into which the cylindrical protrusion 91 slides and enters between a pair of flow paths (not shown) provided on the inside thereof. The guide recess 93 extends in the direction in which the pair of flow paths extend, and the cross-sectional shape thereof is substantially the same as the shape of the cylindrical protrusion 91 viewed from the longitudinal direction of the arm head 40. That is, inside the guide recess 93, a pair of guide rail portions 94 that enter the respective notches 92 provided in the cylindrical protrusion 91 are provided. Thereby, as shown by a broken line arrow M <b> 2 in the figure, the wiper side connecting member 90 is fixed to the arm head 40 without rattling by inserting the cylindrical protrusion 91 into the guide recess 93.

  Also in the third embodiment formed as described above, the same operational effects as those of the first embodiment described above can be obtained. In addition, in the third embodiment, in particular, the shape on the arm head 40 side can be simplified, so that the manufacturing cost of the arm head 40 can be reduced.

  Next, a fourth embodiment of the present invention will be described in detail with reference to the drawings. Note that parts having the same functions as those of the first embodiment described above are denoted by the same reference numerals, and detailed description thereof is omitted.

  FIG. 14 is a perspective view showing the wiper side connecting member of the fourth embodiment.

  As shown in FIG. 14, the fourth embodiment is different from the first embodiment only in the structure for fixing the wiper side connection member (connection member) 100 to the arm head 40. Specifically, the head-side pipe accommodating portion 41a of the arm head 40 is provided with a positioning projection 101 that protrudes toward the opening side (upper side in the drawing) of the head-side pipe accommodating portion 41a. In addition, around the positioning projection 101, four through holes 102 (only three are shown in the figure) that penetrate the head main body 41 are provided. These through holes 102 are provided at equal intervals (90-degree intervals) along the circumferential direction of the positioning protrusions 101.

  A pair of engagement claws 103 (only one is shown in the figure) is provided on the wiper side connection member 100 on the head side pipe housing portion 41a side. These engaging claws 103 are arranged so as to face each other from the lateral direction of the arm head 40 with the positioning projection 101 as the center. Each engaging claw 103 passes through the through hole 102 and is exposed to the outside of the head main body 41 on the side opposite to the head side pipe accommodating portion 41a side.

  Further, the wiper side connection member 100 is provided with a pair of engagement recesses 104 (only one is shown in the drawing). These engaging recesses 104 are arranged so as to face each other from the longitudinal direction of the arm head 40 with the positioning projection 101 as the center. Each engagement recess 104 is engaged with each engagement claw 106 of the stopper member 105.

  A stopper member 105 formed in a substantially disk shape is mounted from the outside of the head main body 41 on the side opposite to the head side pipe housing portion 41a side. A pair of engaging claws 106 are provided on the arm head 40 side of the stopper member 105. These engaging claws 106 are arranged so as to face each other from the longitudinal direction of the arm head 40 with the positioning projection 101 as the center. Each engaging claw 106 passes through the through hole 102 and is exposed to the head side pipe accommodating portion 41 a side of the head main body 41.

  The stopper member 105 is provided with a pair of engaging recesses 107. These engaging recesses 107 are arranged so as to face each other from the lateral direction of the arm head 40 with the positioning projection 101 as the center. Each engagement recess 107 is engaged with each engagement claw 103 of the wiper side connection member 100.

  Then, as indicated by a broken line arrow M3 in the drawing, the respective engaging claws 103 of the wiper side connection member 100 are inserted into the through holes 102 while positioning the wiper side connection member 100 on the positioning projection 101, respectively. As indicated by the middle broken line arrow M4, the engaging claws 106 of the stopper member 105 are inserted through the through holes 102, respectively. Thereafter, the wiper side connection member 100 and the stopper member 105 are pressed so as to be close to each other, whereby each engagement claw 106 is engaged with each engagement recess 104 and each engagement claw 103 is engaged with each engagement recess 107. Match. Thereby, the wiper side connection member 100 is fixed to the head side piping accommodating part 41a.

  Also in the third embodiment formed as described above, the same operational effects as those of the first embodiment described above can be obtained.

  It goes without saying that the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the invention. For example, in each of the above embodiments, the nozzle unit 70 is provided on the arm shank 50. However, the present invention is not limited to this, and for example, the nozzle unit is provided along the longitudinal direction of the wiper blade. It doesn't matter.

  In the above embodiments, the wiper device 10 for wiping the windshield 11 on the front side of the vehicle is shown. However, the present invention is not limited to this, and the wiper for wiping the windshield on the rear side of the vehicle is used. It can also be applied to devices. Furthermore, the present invention can be applied not only to vehicles such as automobiles but also to wiper apparatuses such as railway vehicles, airplanes, and ships.

10 Wiper device 11 Wind shield (wiping surface)
20 Wiper blade 21 Blade rubber 21a Main body part 21b Lip part 21c Neck part 22 Holder member 22a Holder main body 22b Fin part 22c Vertibra 23 Connecting part 23a Connecting main body 23b Base plate 23c Cover member 23d Cylindrical pin 23e Hook fixing member 30f Fixed leg part 30 Wiper arm 40 Arm head 41 Head body 41a Head side pipe accommodating portion 41b Side wall 41c Engaging recess 41d Side wall 41e Engaging recess 42 Shaft fixing portion 42a Holding hole 42b Bridging portion 42c Guide wall 42d Opening portion 43 Shank mounting portion 43a Support pin Dynamic axis)
43b, 43c Pin mounting wall 43d Hook pin 44 Outward side washer tube (outward side piping)
44a Vehicle side tube (upstream piping)
44b Nozzle side tube (downstream piping)
45 Return way washer tube (return side piping)
45a Vehicle side tube (upstream piping)
45b Nozzle side tube (downstream piping)
46 Wiper side connection member (connection member)
46a, 46b Flow path 46c First engagement claw 46d Second engagement claw 50 Arm shank 51 Bottom wall 52a, 52b Side wall 52c Projection piece 52d, 52e Support piece 53 Shank side pipe housing part 54 First holder 54a, 54b Projection piece 55 Second holder 55a Support surface 60 Arm piece 70 Nozzle unit 71 Outward side block 71a Outward side first wall portion 71b Outward side arm portion 71c Outward side second wall portion 71d Outward side facing surface 71e Outward side nozzle cap 72 Return side block 72a Return side first wall portion 72b Return side arm portion 72c Return side second wall portion 72d Return side facing surface 72e Return side nozzle cap AR Wiping range BD Vehicle body CJ Vehicle side connection member CP End cap FK Hook HL Screw hole PS Swing Shaft R Rivet SC Fixing screw SP Spring TS Tapered surface A1 Outward side first injection nozzle B1 Outward side second injection nozzle C1 Outward side third injection nozzle D1 Outward side fourth injection nozzle E1 Return side first injection nozzle F1 Return side second injection nozzle G1 Return side third injection nozzle W1 Outward pass Side washer fluid W2 Return pass washer fluid 80 Wiper side connection member (connection member)
81 1st elastic nail 82 2nd elastic nail 90 Wiper side connection member (connection member)
91 Cylindrical projection 92 Notch portion 93 Guide recess 94 Guide rail portion 100 Wiper side connection member (connection member)
DESCRIPTION OF SYMBOLS 101 Positioning protrusion 102 Through-hole 103 Engagement claw 104 Engagement recessed part 105 Stopper member 106 Engagement claw 107 Engagement recessed part

Claims (6)

A wiper device comprising a wiper blade for wiping the wiping surface,
An arm head provided at one end with a shaft fixing portion fixed to the swing shaft;
An arm shank with one end attached to the other end of the arm head and the wiper blade attached to the other end;
A nozzle unit that is provided on the arm shank or the wiper blade, and sprays a cleaning liquid toward the wiping surface;
A head-side pipe accommodating portion that is provided along the longitudinal direction of the arm head and is opened toward the wiping surface;
Housed in the head side pipe housing part, the forward side pipe and the return side pipe connected to the nozzle unit at the tip side,
Have
Proximal end sides of the forward path side pipe and the return path side pipe are arranged in the axial direction of the swing shaft at one end portion of the arm head, and pass through the side of the shaft fixing portion, and the curved contour of the shaft fixing portion. to not along, of its curvature so as to curved in the opposite direction, is drawn to the outside from the head-side pipe receiving portion,
Wiper device. The wiper device according to claim 1,
At one end of the arm head, a holding hole is provided for holding the forward path side pipe and the return path side pipe side by side in the axial direction of the swing shaft.
Wiper device. The wiper device according to claim 1 or 2,
At one end of the arm head, a guide wall is provided that causes the forward path side pipe and the return path side pipe to run along the outer periphery of the shaft fixing part when swinging in one direction of the shaft fixing part.
Wiper device. It met wiper apparatus according to any one of claims 1 to 3,
The forward path side pipe and the return path side pipe are respectively provided with an upstream pipe and a downstream pipe, and the head side pipe accommodating portion is provided with a connecting member for connecting the upstream pipe and the downstream pipe, respectively.
Wiper device. It met wiper apparatus according to any one of claims 1 to 4,
It said arm shank, the al provided along the longitudinal direction and is open toward the wiping surface, the shank-side pipe accommodating portion for accommodating the forward pipe and the return pipe is provided,
Wiper device. It met wiper apparatus according to any one of claims 1 to 5,
One end portion of the arm shank is provided to be rotatable with respect to the other end portion of the arm head via a rotation shaft extending in a direction intersecting the swing shaft,
The forward path side piping and the return path side piping are arranged in the wiping direction of the wiper blade at the portion of the rotating shaft,
Wiper device.

Images