JPH09234173A - Suction tool for vacuum cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress rapid increase in suction negative pressure, even if a dust collecting port is closed. SOLUTION: A junction chamber 30 is formed in a suction tool which is extended to the left/right around a connecting tube communicated with a cleaner main body. A dust sucking chamber 25 which is communicated with the junction chamber 30 and extended in the left/right direction is formed in the bottom face of the suction tool. A draft chamber 41 having its one end communicated with the dust sucking chamber 25 and the other end communicated with the outer circumferential face of the suction tool is formed in the suction tool. The first and the second beating members 14, 15 are arranged in parallel to each other in the adjacent to the front wall 26a and the rear wall 26b of the dust sucking chamber 25 respectively and the third beating member 16 is arranged in the intermediate part and in the inner part of these first and the second beating members 14, 15. A vent hole 40 is formed in the front wall 26a of the dust sucking chamber 25 in the lower part toward the vibrating region of the first an the second beating members 14, 15 in the top of the draft chamber 41, a vent hole 42 is formed in the bottom of the draft chamber 41, and a shielding plate is provided on the upper vent hole 40.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a carpet, tatami mat,
Alternatively, the present invention relates to a suction tool of an electric vacuum cleaner that is used for sucking dust contained in a surface to be cleaned while striking a surface to be cleaned such as a blanket or a curtain to provide vibration.

[0002]

2. Description of the Related Art Cleaning while hitting the surface to be cleaned is
Since it can knock out dust that is sunk on the surface to be cleaned, it is excellent in that it has a high dust absorption effect. Electric vacuum cleaners having such a tapping function have been studied in the past.

As a structure for removing the surface to be cleaned, a structure utilizing the driving force of an electromagnetic solenoid is disclosed.
As described in Japanese Patent Publication No. 79, it is proposed that the striking member is vibrated by the suction pressure so as to have no special drive device.

Japanese Utility Model Publication No. 47-18479 discloses a cleaner provided in communication with the cleaner body and provided with a plurality of elastic members. As a cleaning device, a cleaning device has been disclosed in which an elastic material is vibrated up and down in response to suction pressure from a cleaner body, and hits a surface to be cleaned such as furniture or a cushion to suck pride.

The case of the cleaner has an elongated and flat rectangular parallelepiped shape, and a rectangular space for communicating with the cleaner body is formed in the case, and the end wall surfaces in the longitudinal direction are connected to this space. The three elastic members extending in such a manner are erected. The elastic material has no core material and has an elliptical cross-sectional shape. A pair of elastic materials are arranged near the side wall in the case in contact with the side wall. Another elastic material is arranged at the back. These elastic members are held so that the long axes of the respective ellipses are oriented horizontally, and the opening of the case is almost closed by the three elastic members.

[0006]

However, in the conventional cleaning device of the type in which the elastic material is vibrated by the suction force of air, when the air is sucked into the cleaning device to a large extent, the cloth or the like may get into the case and the air There is a problem that the opening that sucks in is blocked, the suction negative pressure rises and the vibrating elastic material does not move, or the motor on the cleaner body side is overloaded.

Further, since the areas of the suction opening and the discharge opening of the intake air passage are constant, if the suction amount of air per unit time of the cleaner body is different, the number of vibrations of the elastic material,
Since the amplitude is different, the ability to knock out dust is different.

When the hardness of the surface of the portion to be cleaned changes, the dust suction opening is closed differently, resulting in different tapping force. When the hardness is high, the air sucked from the dust suction opening is sufficient, but when the hardness is low, such as a futon, blanket, curtain, etc., the dust suction opening is blocked and it is impossible to sufficiently blow it out. However, there is a problem that the load of the motor on the cleaner body side increases.

On the other hand, in order to prevent a sudden increase in negative pressure and ensure vibration of the elastic material when the opening is closed in the case, a vent hole communicating with the outside of the case is opened below the elastic material. If you leave it in, you can secure the vibration of the elastic material by sucking air from the vent, but if it is left open, if the surface to be cleaned is soft such as sheets, it will enter the dust collection chamber and block the opening. Therefore, there is a problem that the elastic material does not vibrate. Further, if it is always open, there is a problem that the suction force from the opening of the dust suction chamber that sucks in dust decreases.

The suction device for an electric vacuum cleaner according to the present invention introduces air so as to lower the negative pressure when the negative pressure sucked by the opening of the dust suction chamber in which the striking member is closed is blocked. , The purpose is to ensure that the striking member can be vibrated.

[0011]

In order to solve the above-mentioned problems, a suction tool for an electric vacuum cleaner according to claim 1 of the present invention is a suction tool that extends left and right around a connecting pipe connected to a cleaner body. A relay chamber communicating with the connecting pipe is formed therein, a dust suction chamber communicating with the relay chamber and extending in the left-right direction is formed on a lower surface of the suction tool, and one end of the suction tool communicates with the dust suction chamber. A ventilation chamber is formed, the other end of which communicates with the outer peripheral surface of the suction tool, and first and second striking members are arranged in parallel in the vicinity of the front and rear side walls of the dust suction chamber along the longitudinal direction of the dust suction chamber. And these first and second
Suction device for a vacuum cleaner, in which a third striking member extending along the first and second striking members is provided at an intermediate position of the striking member in the rearward direction of the suction air flow. In the tool, a ventilation hole is formed in a side wall of the dust collection chamber and below the vibration region of the first and second striking members, the ventilation hole communicating the ventilation chamber with the dust collection chamber is formed. It is characterized in that an air volume adjusting means for adjusting is provided.

Further, in the suction tool of the electric vacuum cleaner according to claim 2 of the present invention, a relay chamber communicating with the connection pipe is formed in the suction tool extending left and right around the connection pipe connected to the cleaner body. A suction chamber is formed on the lower surface of the suction tool and communicates with the relay chamber and extends in the left-right direction. One end of the suction tool communicates with the dust collection chamber and the other end communicates with the outer peripheral surface of the suction tool. A ventilation chamber is formed, and first and second striking members are arranged in parallel in the vicinity of the front and rear side walls of the dust suction chamber, the first and second striking members being arranged along the longitudinal direction of the dust suction chamber.
A third striking member extending along the first and second striking members is disposed at an intermediate position between the first and second striking members and at a position in the depth direction of the suction airflow. In the suction tool for an electric vacuum cleaner, a ventilation hole is formed in a side wall of the dust suction chamber and below a vibration region of the first and second striking members so that the ventilation chamber communicates with the dust suction chamber. The vent hole is provided with a valve element that projects toward the opening side of the dust suction chamber and opens the vent hole when the negative pressure in the dust suction chamber is high.

A suction tool for a vacuum cleaner according to a third aspect of the present invention is the suction tool for a vacuum cleaner according to the second aspect, wherein the valve element slides in a thickness direction of a side wall in which the vent hole is formed. It is characterized by doing.

According to the suction tool for an electric vacuum cleaner of claims 1 to 3 of the present invention, even if the dust suction opening formed on the lower surface of the suction tool is blocked with a futon, a blanket or the like, air is blown from the vent hole side. Since it can be guided to the dust collection chamber, vibration of the hitting member can be secured.

In this case, according to the suction tool of claim 1, for example, depending on the suction force of the main body of the electric vacuum cleaner to which the suction tool is connected, or according to the type of the surface to be cleaned, from the vent hole side. By adjusting the air volume to the dust collection chamber, it is possible to make the striking force constant regardless of the suction force of the cleaner body and the type of surface to be cleaned.

According to the suction tool of the second and third aspects, when the dust suction opening is closed by the surface to be cleaned and the negative pressure in the dust suction chamber becomes high, the valve body projects toward the dust suction chamber side and opens the vent hole. Therefore, at the same time, the reduction of the suction air from the dust suction opening is suppressed, and when the negative pressure of the dust suction chamber becomes high, the valve body suppresses the surface to be cleaned and the ventilation hole from being blocked.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows the overall structure of an electric vacuum cleaner having a suction port body according to the embodiment. The main body 1 of the electric vacuum cleaner is detachably attached to a suction port of the main body 1, a dust suction hose 2, an operation handle 3 fixed to a tip portion of the hose 2, and a detachable end portion of the handle 3. Extension tubes 4 and 5 which are plugged in and connected to
The suction tool 6 is detachably inserted and connected to the tip of the extension tube 5 or the tip of the operation handle 3. The electric vacuum cleaner body 1 has a built-in electric blower (not shown), and its operation causes a dust suction operation. The operation handle 3 has a remote control switch for remote operation, and the operation of the switch controls the operation of the electric blower. In the following embodiments, the side of the suction tool 6 to which the extension tube 5 is connected is defined as the rear side, the opposite side of the extension tube 5 is defined as the front side, and the suction tube 6 is positioned with the connecting tube 12 down as shown in FIG. The right side of FIG. 3 and the left side of FIG.

<First Embodiment> The suction tool 6 of the first embodiment will be described below. Suction mouth body 1
As shown in FIG. 2 to FIG. 11 and FIG. 13, 1 is an upper case 21 made of synthetic resin such as ABS resin or polypropylene.
And the lower case 22 are assembled by associating their open end faces. The overall shape of the suction port portion main body 11 is generally a horizontally long cylindrical shape, and the central portion in the longitudinal direction thereof swells so that it can easily slip off even if a futon or the like is applied to the outer periphery.

Inside the suction port body 11, the connecting pipe 1
The relay chamber 30 in which the two communicate with each other, the dust suction chamber 25 in communication with the relay chamber 30, and the ventilation chamber 41 are formed separately. The air sucked from the dust suction opening 25a into the dust suction chamber 25 is sucked into the connecting pipe 12 through the relay chamber 30.

<Upper Case> As shown in FIG. 13, a central partition wall 29 is formed on the inner surface of the upper case 21 to form a relay chamber 30 communicating with the connecting pipe 12. The central partition 29 has a planar shape in which the front side of the upper case 21 is rectangular and the rear side is trapezoidal, and forms an upper part of the relay chamber 30 in the upper case 21. Similarly, the lower case 22 is also provided with a central partition 27 having a planar shape similar to that of the central partition 29. Central partition wall 27 of lower case 22 and central partition wall 29 of upper case 21
The relay chamber 30 is formed by and the rear part of the relay chamber 30 communicates with the connecting pipe 30.

The central partition 27 of the upper case 21 and the lower case 2
Grooves and projections that fit with each other are continuously formed on the tip end surface of the second central partition 29, and the relay chamber 30 is formed by fitting the grooves and the projections of the central partition 27 and the central partition 29 with each other. Is formed. In the relay chamber 30, a rectifying rib 31 extending in the left-right direction is provided in a protruding manner. The rib 31 is
The suction air flow from the dust collection chamber 25 toward the connection pipe 12 and the air flow from the ventilation holes 51 and 52 formed in the lower case 22 toward the connection pipe 12 are prevented from swirling in the relay chamber 30. .

Around the central partition 29 of the upper case 21,
As shown in FIG. 13, a boss 21b for screwing a screw is projected. The upper case 21 and the lower case 22 have screws 2
3 is connected to the boss 21b by screwing.

As shown in FIG. 4, a substantially cylindrical projecting cylindrical portion 32 communicating with the rear end of the relay chamber 30 is integrally projected rearward at the longitudinal center of the rear wall of the upper case 21. The connecting pipe 12 is rotatably attached to the tubular portion 32. The connecting pipe 12 is detachably connected to the distal end of the extension pipe 5 or the distal end of the operation handle 3 described above, and when the electric vacuum cleaner body 1 is operated, the suction pressure generated by the electric blower is connected to the connecting pipe 12. And the dust collection chamber 25 through the relay chamber 30.

Inside the suction tool 6, there is formed a ventilation chamber 41 which is partitioned from the relay chamber 30 and one of which opens to the upper surface of the upper case 21 and the other of which opens below the striking members 14 to 16 on the side wall of the dust suction chamber 25. Has been done. A lower ventilation hole 42 is opened on the upper surface side of the upper case 21 of the ventilation chamber 41.
As shown in FIG. 4, the relay chamber 30 is provided above the ventilation hole 41.
And the upper part of the ventilation chamber 41 is hollow.

A plurality of ventilation holes 40 are formed on the upper surface of the upper case 21 so as to be aligned in the left-right direction. Vent 40
Communicates the ventilation chamber 41 inside the suction tool 11 with the outside air, and sucks the air on the upper surface side of the suction tool 1 into the suction tool 1
1 inside.

<Air Volume Adjusting Means> FIG. 6 shows this ventilation hole 40.
A shield plate 90 as an air volume adjusting means is provided on the. The shield plate 90 is provided with a knob portion 92 provided so as to project into an opening portion 91 formed on the upper surface of the upper case 21.
And a base portion 93 of the knob portion 92, a base portion 94 extending from the base portion 93 in the arrangement direction of the ventilation holes 40, and a plurality of closing plate portions 95 protruding from the base portion 94 in a comb shape. Each of the closing plate portions 95 has a rectangular shape, and has a size that can close the ventilation hole 40 slightly larger than one ventilation hole 40. The number of the closing plate portions 95 formed is equal to the number of openings of the ventilation holes 40. The adjacent closing plate portions 95,
The recess 9 between the holes 9 is slightly smaller than the width of one ventilation hole 40.
6 is formed, and the air above the upper case 21 can be introduced into the ventilation chamber 41 by combining the recess 96 and the ventilation hole 40. The shield plate 90 is supported by a support plate 97 formed along the edge of the opening 91 on the upper inner wall surface of the upper case 21. The support plate 97 divides the left and right sides and the rear part of the opening 91 from the relay chamber 30. The upper end of the partition wall 29, which corresponds to the lower part of the opening 91, can slide the root part 93 of the shielding plate 90. And is in communication with the ventilation chamber 41. The sliding distance of the knob portion 92 in the opening portion 91 is determined by the opening / closing plate portion 9
If the knob portion 92 is slid to one of the left and right sides, the opening / closing plate portion 95 and the vent hole 40 are overlapped with each other to close the vent hole 40, and the knob portion 92 is left or right. If it is slid, the recess 96 and the vent hole 40 are overlapped with each other to open the vent hole 40.

In this embodiment, the sliding operation of the shield plate 40 is performed by manually operating the knob portion 92, but it is electrically driven by a combination of an electromagnetic solenoid, a motor and a gear or a link mechanism, an air cylinder or the like. Then, the vacuum cleaner may be operated by hand. In this case, such an actuator is provided on the inner wall surface or the outer wall surface of the upper case 21.

A predetermined pressure sensor is provided to detect the negative pressure of the ventilation chamber 41 or the relay chamber 30 so that these actuators automatically operate when the negative pressure of the dust suction chamber 25 becomes high. The actuator may be electrically controlled so as to operate when the negative pressure value is reached. Also,
By utilizing the fact that the closing plate portion 95 bends due to negative pressure, a portion that supports the tip end portion of the closing plate portion 95 is projectingly provided on the inner surface of the ventilation chamber 42, and a strain sensor that is pushed by the closing plate portion 95 is provided at this portion. The actuators may be operated by the provision of this detection signal. Further, the shielding plate 90 may be provided inside the ventilation chamber 41 and between the ventilation holes 40 and 42.

In this way, when the suction tool is used in an electric vacuum cleaner having a different air suction capacity per unit time, or when the suction power of the dust collecting chamber on the main body of the vacuum cleaner is lowered, the switching lever Can be automatically adjusted.

<Lower Case> In the lower case 22, as shown in FIGS. 2 to 11, there is formed a dust suction chamber 25 extending in a laterally elongated direction. The central part of the dust collection room 25 is the relay room 3
0, the left and right ends of the dust suction chamber 25 extend to the left and right of the suction tool 6, and the vertical cross section of the dust suction chamber 25 is partitioned by a partition wall 26 having a substantially inverted U shape.

In this dust collection chamber 25, three hitting members 14 to 16 for picking up tatami mats, carpets, futons, etc. are arranged in parallel.

The edge portion 25c and the left and right edge portions 25d at the rear of the dust suction opening 25a of the dust suction chamber 25 are formed so as to be one step lower than the entire lower surface of the lower case 21, and when the lower case 21 is applied to the floor surface and sucked. It is designed to form an air passage.

Reference numeral 28 in FIGS. 12 and 13 denotes a pair of partition walls extending forward from both side walls of the central partition wall 27 and integrally connected to the central portion of the front wall of the lower case 22. , 28, the front wall 27a of the central partition wall 27, and the central portion of the front wall of the lower case 21 form a ventilation chamber 41.
A horizontally elongated lower ventilation hole 42 is opened in the lower center of the front wall 27a of the central partition wall 27, and the ventilation chambers 39, 41 and the dust suction chamber 25 communicate with each other through the lower ventilation hole 42.

As shown in FIGS. 3 and 5, a pair of steps 21b1 are formed on the left and right sides of the rear wall 26b of the partition wall 26. Between the pair of steps 21b1 and 21b1, there is provided a convex portion 26b2 protruding toward the hitting member 15 side near the rear wall 26b. The convex portion 26b2 is the partition wall 26.
Is formed in the central portion in the longitudinal direction of. The height A of the step 26b1 is about 0.5 to 1.0 mm.

As shown in FIGS. 2 and 3, in the lower end portion of the front wall 22c of the lower case 22, a groove 45 for disposing the bolt 23 is provided.
Are formed. The front end of the groove 45 communicates with the front outside air of the lower case 22 as an inlet 45a, and the rear end of the groove 45 has an outlet 4a.
5a communicates with the dust collection chamber 25.

At the rear edge of the dust suction opening 25a, a pair of grooves 47 that form a gap between the floor surface and the lower surface of the lower case 22 are formed from the edge of the dust suction opening 25a to the lower portion of the connecting pipe 12. Has been done. The groove 47 forms an air suction passage between the floor and the lower case 22 when the lower case 22 contacts the floor. The front side of the rib-shaped sled wall 48 between the pair of grooves 47, 47 is obliquely cut out so as to form a passage 47b with the floor surface. This groove 47
Even if the lower case 22 comes into contact with the floor surface via the passage 47b, the groove 47 and the passage 4 are provided between the lower case 22 and the floor surface.
7b, forming an air passage through the rear depression 25c,
Air can be sucked in over the entire area of the dust suction opening 25a. The sled wall 48 improves the runnability of the suction tool 6 in the front-rear direction. 2 and 4, reference numeral 49
Is a recess for preventing meat sink provided in the rear portion of the lower case 22, and reference numeral 50 is a recess for preventing meat sink provided on both sides of the pair of grooves 47.

Vent holes 51 and 52 shown in FIGS. 2 to 4 and 12 are opened in the rear recess 25c of the dust suction opening 25a. The vent holes 51 and 52 directly communicate with the relay chamber 30 without passing through the dust suction chamber 25. The ventilation holes 52 are provided on both sides of the pair of grooves 47. The ventilation holes 51 and 52 suck air when the suction tool 6 is separated from the surface to be cleaned, and reduce the vibrations of the hitting members 14 to 16. It is provided.

At least one, for example, two guards 53 that are flush with the lower surface of the lower case 22 are provided in the dust suction opening 25a. The guard 53 is formed of a bridge extending in the front-rear direction over the front and rear opening edges of the dust suction opening 25a that face each other, and at the central portion in the longitudinal direction of the dust suction opening 25a,
It extends at right angles to the striking members 14-16. Vent holes 52 are arranged near the rear ends of the pair of guards 53, respectively. The width of the entrance of these vent holes 52 is larger than the width of the guard 53.

As shown in FIGS. 3 and 4, a protrusion 54 is provided at the front edge of the dust suction opening 25a. The protruding portion 54 horizontally protrudes rearward from the lower end of the front wall 22c of the lower case 22, and the pair of guides 5
It is connected to the front end part of 3. The protruding portion 54 is
This lower surface 22 is flush with the lower surface 11a of the lower case 22
The outlet 42 is covered when viewed from the side 1a. As shown in FIG. 3, the width of the center of the three dust suction openings divided by the guard 53 is narrower than the width of the other dust suction openings.

A ventilation chamber 41 is formed at the front portion of the front wall 26a of the dust collection chamber 25, one end of which communicates with the dust collection chamber 25 and the other end of which communicates with the outer peripheral surface of the suction tool 11. Dust collection chamber 25
Of the front wall 26a of the first and second striking members 14, 15
Of the front wall 26a in the longitudinal direction of the front wall 26a, and the first and second striking members 1
One of the lower ventilation holes 4 of the ventilation chamber 41 is provided below the ventilation holes 4 and 15.
2 is formed, and the dust collection chamber 25 is formed near the lower ventilation hole 42.
A valve body 70 is provided which projects from the dust suction opening 25a and opens the lower vent hole 42 when the negative pressure inside is high. The valve body 70 is rotatably supported by a shaft 72 held on the base side of the protruding portion 54. A coil spring 71 is wound around the shaft 72. One end of the coil spring 71 is hooked on a hook 74 on the inner wall of the lower portion of the ventilation chamber 41, and the other end of the coil spring 71 is hooked on a hook 73 projecting from the back surface of the valve body 70. The valve body 70 closes the lower ventilation hole 42 by the elastic force of the coiled spring 71 when the dust suction opening 25a is not blocked, and the dust suction opening 25a is blocked by the cleaning surface P of the cloth or sheet. At this time, the lower ventilation hole 42 is opened to open the ventilation chamber 41.
Air is introduced from the ventilation hole 40 in the upper part of the upper case 21 via the.

Therefore, even if the dust collecting bag is clogged or the power of the suction motor is reduced, the dust suction opening 25
Striking amount from the a side is secured and hitting members 14, 15,
16 vibrations can be made. When the dust suction opening 25a is blocked by the surface P to be cleaned, the air in the ventilation chamber 41 can be sent to the dust suction chamber 25 to maintain the vibration of the hitting members 14, 15, 16 as much as possible.

FIG. 10 shows the structure of the valve body according to the second embodiment of the present invention. The valve body 80 of FIG. 10 is located in the vicinity of the front wall 26a of the dust collection chamber 25, and the first and second striking members 14, 1
5 is arranged below the vibration area. Lower ventilation hole 42
A valve body 80 capable of blocking the lower ventilation hole 42 more largely
A shaft 81 is projectingly provided on the shaft 81, and a projection 83 for receiving a spring 84 is formed on the other end of the shaft 81. The spring 84 is the front wall 26.
It is sandwiched between a and the projection 83, and the valve body 80 is inserted into the ventilation chamber 4
It is biased to the inner side of 1. A step 26a for accommodating the valve body 80 is formed around the lower ventilation hole 42, and a protrusion 26c for receiving the spring 84 is provided on the protrusion 54 side so as to project. When the suction negative pressure of the air in the dust collection chamber 25 is rapidly increased, the valve body 80 slides along the protrusion 54 against the elastic force of the spring 84, and the air is introduced into the dust collection chamber 25 from the lower ventilation hole 42. Introduce. When air is introduced into the dust collection chamber 25, the valve body 80
Pushes the cleaning surface of the cloth or sheets approaching the protrusion 54 toward the tip end side of the protrusion 54 to secure an air passage.

<Striking member> In the dust collection chamber 25, the striking member 14
Nos. 16 to 16 are built in so as to vibrate vertically due to suction pressure. 4A and 4B show the hitting member 14
The cross-sectional shape of 16 is shown. In FIG. 4, the striking member 14 near the front wall 26a of the dust suction chamber 25 is the first striking member, and the striking member 15 near the rear wall 26b of the dust suction chamber 25 is the second striking member. The member 16 corresponds to the third hitting member. The hitting members 14 to 16 include shafts 14a to 16a such as piano wires, beaters 14b to 16b inserted through the shafts 14a to 16a, and sleeves 14c to 1c.
And 6c. The beaters 14b to 16b are made of short cylindrical tubes, and are made of rubber or elastomer to reduce operating noise.

The striking members 14 and 15 are disposed near the front and rear side walls 26a and 26b of the dust collection chamber 25, and the striking members 14 and 1 are
5 extend along the longitudinal direction of the dust collection chamber 25, and are arranged in parallel at intervals. Third tapping member 16
Is disposed in the middle of the striking members 14 and 15 and at a position in the back of the suction airflow of the dust suction chamber 25. Third
The hitting member 16 extends along the first and second hitting members 14 and 15.

The striking member 16 is arranged at the center of the suction air flow, and the striking members 14, 1 near the front and rear walls 26a, 26b are arranged.
The suction airflow is faster than 5 and the elastic modulus is striking member 1
Since the hitting member 16 is set lower than the hitting members 14 and 15, the hitting member 16 is more likely to vibrate than the hitting members 14 and 15, and the amplitude is increased to improve the hitting effect. Between the hitting members 14 and 15 and the hitting member 16, the cycle of vibration tends to be different due to the difference in elastic modulus, so that the hitting members vibrate in opposite directions and collide.

The shafts 14a and 15a are provided with sleeves 14c to 16c for limiting axial movement to a minimum. The sleeves 14c to 16c are beaters 14b to 16b.
It has a smaller diameter and is fitted to both longitudinal ends of the shafts 14a to 16a. The number of beaters of each striking member 14 to 16 may be one instead of plural, and the beaters 14b to 16b are located on both sides of the beater 14 and the sleeve 14
It may be molded integrally with c to 16c. Also, the shaft 14a
The beaters 14b to 16b of 16a to 16a may have an elliptical cross section.

As shown in FIG. 12, bearings 6 formed separately from the lower case 22 are provided at both left and right ends of the dust collection chamber 25.
1, 62 are individually attached. The bearing 62 is
FIG. 10 is composed of a pair of upper and lower comb-tooth-shaped members, and is configured to hold the shaft by inserting the tip of the other comb-tooth into the recess 62d of one comb-tooth.

That is, on the left side of FIG. 3 (the right end in FIG. 12), the recess 61a for disposing the bearing 61 is formed inside the lower case 22 in a rectangular shape elongated in the front-rear direction. As shown in FIG. 12B, the bearing 61 has a shaft 14a,
Three holes 61b for inserting the elongated portions 15a and 16a are formed. Sleeves 14c, 15c, 16 are provided in the holes 61b.
c does not pass. The bearing 61 is inserted into the disposing recess 61a from the inside of the lower case 22, and is integrally formed with the stopper 6
It is stopped by 1c. The bearing 61 is a stopper 61c
Is placed in the state where it hits the edge of the placement recess 61a.
The bearing 61 is fixed by fitting with 1a. The side wall of the dust collection chamber 25 to which the bearing 61 is attached is opened so that the hole 61b of the bearing 61 is exposed in the dust collection chamber 25.

As shown on the left side of FIG. 12, the hole 6 for fixing the bearing 62 shown in FIG.
2e is opened. The hook portion 62c of the bearing 62 is hooked on the hole 62e. As shown in FIG. 10, the bearing 62 includes a comb-shaped piece 6 having a hook portion 62c.
2a and a comb-teeth-shaped piece 62b that fits into the comb-teeth recess 62d of the piece 62a. As shown in FIG. 10, the pieces 62a and 62b are combined and the hook portion 62c is inserted and fixed from the lower surface side of the lower case 22. . Piece 62
When a and 62b are combined as shown in the figure, the shaft 14
An elongated hole 62e for inserting a, 15a, 16a is formed.

Therefore, both ends of each striking member 14 to 16 are supported by both side walls in the longitudinal direction of the dust collection chamber 25. Further, each of the striking members 14 to 16 has the largest amplitude at the central portion in the longitudinal direction and has the smallest amplitude at both ends, and the valve body 70 protrudes at both longitudinal end portions of the dust collection chamber 25. There is no contact with 14.

The shafts 14a to 16a have the bearing 6 in advance.
1 and only the comb tooth-shaped piece 62a of the bearing 62
After fixing to the left and right of 5, the hitting members 14 to 16 are inserted under the guides 53 and 53 into the recess between the hole 61b and the comb teeth, and then the hook portion 6 of the hook-side piece 62b of the bearing 62.
2c is inserted into the hole 62e and fixed.

Strike members 14 to 16 in the dust collection chamber 25.
Is disposed slightly above the dust suction opening 25a, as shown in FIGS. Front and rear striking members 14, 1
The heights of 5 are the same, and the front wall 26a and the rear wall 26b are the same.
And the striking member 16 is disposed above the striking members 14 and 15. When viewed from the lower side of the lower case 22, the hitting members 14 to 16 are arranged side by side so as to substantially close the dust suction opening 25a.

When the suction pressure is not applied, each of the striking members 14 to 16 maintains a horizontal posture due to its elastic force. The hitting members 14 to 16 adjacent to each other may be in contact with each other, and the hitting members 14 to 16 may be provided at the same height without changing the height.

Between the striking members 14 to 16 and the front and rear walls of the dust collecting chamber 25, gaps B and C are formed in a state where the striking members 14 to 16 are kept horizontal without vibrating.
The gap B is a gap between the protrusion 26 b 2 of the rear side wall 26 b and the hitting member 15 in the center of the dust collection chamber 25 in the longitudinal direction. The gap C is a gap between the convex portion 26b2 and both ends of the striking member 15 in the longitudinal direction. The gap B is narrower than the gap C. Front wall 26a, rear wall 26
A gap D wider than the gap C is formed between the left and right ends of b and the left and right ends of the hitting members 14 and 15 in the vicinity. Further, a gap E having the same size as the gap D is formed between the left and right ends of the hitting members 14 to 16.

<Wheels> As shown in FIGS. 11 to 13, the walls 21a and 2 at the left and right ends of the upper and lower cases 21 and 22 are provided.
Bearing grooves 36 are formed correspondingly on the opposing surfaces of 2a. Bearings 37 having an inverted U-shaped cross section are integrally formed on the outer surfaces of the walls 21a at both ends of the upper case 21.
Wheels 13 are rotatably held on bearings 37.

The wheel 13 is made of synthetic resin, and a wheel shaft 13a is projectingly provided inside the cylindrical wheel 13. A flange 13b is projectingly provided on the outer peripheral surface of the wheel shaft 13a.
The flange 13b is held in the bearing grooves 36 and 37 of the both end walls 21a and 22a. The wheel 13 covers and hides the end face of the suction port body 11 in the longitudinal direction.

<Operation> Next, the operation of the suction tool of this embodiment will be described.

Since the suction tool 6 of this embodiment is configured as described above, when the electric vacuum cleaner body 1 is operated, air is sucked through the dust suction hose 2 and the extension tubes 4 and 5, and this suction is performed. Negative pressure spreads over the entire area of the dust suction chamber 25 via the relay chamber 30 in the suction tool 6. As a result, the hitting members 14, 15 vibrate, so that if the lower case 22 is placed on the surface to be cleaned such as a bedding or a carpet, they can be cleaned while scooping them.

That is, when a negative pressure for suction is exerted by rotating the fan of the cleaner body, the upper striking members 14, 15, 16 substantially close the dust suction opening 25a, so that it bends in the vertical direction. . The elastic modulus of the third hitting member 16 is set lower than the elastic moduli of the first and second hitting members 14 and 15, and the third hitting member 16 is softened. There is a gap between the hitting member 16, the first and second hitting members 14 and 15, and the third hitting member 16. When this gap is formed, the amount of air entering the dust collection chamber 25 increases and the suction negative pressure in the dust collection chamber 25 decreases. When the suction negative pressure of the dust collection chamber 25 decreases,
First and second striking members 14, 15 and third striking member 1
6 returns to the original shape, and the third striking member 16 strikes the first and second striking members 14, 15. As a result, the first to third striking members 14 to 16 warp toward the floor surface side and repeat vibration,
Hit the surface to be cleaned, such as a carpet, tatami mat, or futon.

In the process of tapping the surface to be cleaned,
The valve body 70 closes the lower ventilation hole 42 by the urging force of the spring 71, so that even if the power of the motor is reduced or the dust bag on the cleaner body side is clogged, the valve body 70 will not come out from the dust suction opening 25a side. The amount of suction is secured. While the air is being sucked, when the cloth or the sheet is closed by the suction negative pressure from the dust suction opening 25a and the dust suction opening 25a is closed, and the suction negative pressure of the relay chamber 30 and the dust suction chamber 25 is suddenly increased, the valve body 70 is The lower vent hole 42 is opened against the biasing force of the spring 71, and the negative pressure in the dust suction chamber 25 and the relay chamber 30 is relieved. When the valve body 70 opens the lower ventilation hole 42, since the valve body 70 is located at both left and right ends of the dust collection chamber 25 and below the vibration region of the first and second striking members 14, 15, It does not interfere with the striking operation of these striking members 14-16. That is, since the left and right ends of the striking members 14 to 16 have small amplitudes, even if the valve body projects below the striking members 14 to 16,
It does not disturb the vibration of ~ 16. Further, the valve body 70 is the shaft 7
Since it rotates about 2 and further projects from the projecting portion 54, it is possible to suppress the surface to be cleaned that enters through the dust suction opening 25a and prevent the cloth or the like from being wound around the hitting members 14 and 15.

Further, in the gaps B and C of the striking members 14 to 16, the gap C is larger than the gap B, so that the suction pressure acting through the connecting pipe 12 is sufficiently exerted, and the amplitude of the striking members 14 to 16 is increased. Can be increased. This gives
In order to form a large air passage in the center of the dust collection opening 25a,
Can inhale large dust.

On the other hand, since the suction pressure on both sides in the longitudinal direction of the dust collection chamber 25 is lower than the suction pressure in the central portion, the gap C is wide, so that a large amount of dust can be sucked and the dust is less likely to be clogged. It's easy to take. Also,
The configuration for providing a difference in the size of the gap is simple. Shaft 14a
To 16a, sleeve 1 having a smaller diameter than beaters 14b to 16b
Since 4c to 16c are provided, the gap D can be formed wider than the gap B with a simple structure, a large dust can be sucked in, and the dust can be easily taken out even when it is clogged. Since there is the pair of guards 53, it is possible to prevent a cover cloth such as a futon from being sucked into the dust suction chamber 25 deeply, and to enhance the traveling property at the time of cleaning and quickly absorb dust. Protruding part 5
Since 4 is protruding, it is possible to prevent the lower ventilation hole 42 from being blocked by the surface to be cleaned such as the cloth sucked by the protruding portion 54 to the dust suction opening 25a.

When the entire dust suction opening 25a is closed by a soft cleaning surface such as a futon, the entrance 45a of the groove 45,
Since the outside air can pass through at least one of the lower ventilation hole 42, the outlet 47, the air passage 51, etc., the supply amount of air for vibrating the hitting members 14 to 16 can be secured. Therefore,
Not only the surface such as the tatami mat but also the soft surface to be cleaned such as a futon can be oscillated by continuing to vibrate the hitting members 14 to 16 to knock out the dust on the surface to be cleaned and communicate with the connecting pipe 12. The amount of air blown to the electric blower in the main body 1 of the vacuum cleaner can be secured, and the load on the main body 1 of the vacuum cleaner can be reduced.

In the case shown in FIG. 6, when the entire dust suction opening 25a is closed by a soft cleaning surface such as a futon,
Although the negative pressure of the ventilation chamber 41 is increased via the lower ventilation hole 42, the knob portion 92 of the shielding plate 90 is released from the closing plate portion 95 and the ventilation hole 40, and the recess 96 and the ventilation hole 40 are separated from each other. If you slide it so that it communicates, the ventilation chamber 41 will move to the upper case 2.
Since it communicates with the air above 1, the amount of air supplied for vibrating the striking members 14 to 16 can be secured.

Although the suction tool for the electric vacuum cleaner according to the embodiment of the present invention has been described above, the present invention can be applied even if the wheel 13 is not provided. Also, the above embodiments may be combined as appropriate.

[0067]

According to the suction tool for an electric vacuum cleaner according to claims 1 to 3 of the present invention, even if the dust suction opening formed on the lower surface of the suction tool is blocked with a futon, a blanket or the like, the dust suction opening is exposed from the vent hole side. Since air can be guided to the dust collection chamber, vibration of the hitting member can be secured.

In this case, according to the suction tool of claim 1, for example, depending on the suction force of the main body of the electric vacuum cleaner to which the suction tool is connected, or according to the type of the surface to be cleaned, from the vent hole side. By adjusting the air volume to the dust collection chamber, it is possible to make the striking force constant regardless of the suction force of the cleaner body and the type of surface to be cleaned.

According to the suction tool of the second and third aspects, when the dust suction opening is closed by the surface to be cleaned and the negative pressure in the dust suction chamber increases, the valve body projects toward the dust suction chamber side and opens the vent hole. Therefore, at the same time, the reduction of the suction air from the dust suction opening is suppressed, and when the negative pressure of the dust suction chamber becomes high, the valve body suppresses the surface to be cleaned and the ventilation hole from being blocked.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a vent chamber and a vicinity of a valve body according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a configuration of a suction tool according to the first embodiment.

FIG. 3 is a diagram showing a configuration of a lower surface of the suction tool according to the first embodiment.

FIG. 4 is a sectional view taken along line ZZ in FIG.

5 is a cross-sectional view taken along the line YY of FIG.

FIG. 6 is a sectional view of the suction tool of the second embodiment taken along the line ZZ in FIG.

FIG. 7 is a top perspective view of the suction tool of the second embodiment.

8 is a perspective view of the shield plate of FIG.

FIG. 9 is a partial cross-sectional view of the operating state of the valve body and the vicinity of the valve body.

FIG. 10 is a partial sectional view of the vicinity of a valve body according to a second embodiment of the present invention.

11 is a cross-sectional view taken along line XX of FIG.

12A is a plan view showing the configuration of the lower case of the first embodiment, FIG. 12B is a perspective view showing one shape of the shaft bearing, and FIG. 12C is the other shape of the shaft bearing. Perspective view showing

FIG. 13 is a perspective view showing a disassembled state of the suction tool.

FIG. 14 is a perspective view of an electric vacuum cleaner including a suction tool according to an embodiment of the present invention.

[Explanation of symbols]

 11 Suction Port Main Body 12 Connection Pipe 14, 15, 16 Striking Member 21 Upper Case 22 Lower Case 25 Dust Collection Room 30 Relay Room 40 Vent Hole (Air Volume Controlling Means) 41 Vent Room 42 Vent Hole 54 Protrusion 70 Valve Body 80 Valve Body 90 Shielding Plate (Air Volume Adjusting Means) 91 Opening 92 Knob 95 Closing Plate 96 Recess

Claims (3)

[Claims] 1. A relay chamber communicating with the connecting pipe is formed in a suction tool extending left and right around a connection pipe communicating with the cleaner body, and a relay chamber communicating with the relay chamber is formed on a lower surface of the suction tool. A dust collection chamber extending in the left-right direction is formed, one end of which is connected to the dust collection chamber and the other end of which is connected to the outer peripheral surface of the suction unit is formed as a ventilation chamber, and near the front and rear side walls of the dust collection chamber. , First and second striking members arranged in parallel along the longitudinal direction of the dust collection chamber,
A third striking member extending along the first and second striking members is disposed at an intermediate position between the first and second striking members and at a position in the depth direction of the suction airflow. In the suction tool for the electric vacuum cleaner, a vent hole is formed in a side wall of the dust chamber below the vibration region of the first and second striking members so that the vent chamber communicates with the dust chamber. The suction device for an electric vacuum cleaner, further comprising: an air volume adjusting means for adjusting an air volume in the ventilation chamber. 2. A relay chamber communicating with the connecting pipe is formed in a suction tool extending left and right around a connection pipe communicating with the main body of the vacuum cleaner, and a lower surface of the suction tool communicating with the relay chamber. A dust collection chamber extending in the left-right direction is formed, one end of which is connected to the dust collection chamber and the other end of which is connected to the outer peripheral surface of the suction unit is formed as a ventilation chamber, and near the front and rear side walls of the dust collection chamber. , First and second striking members arranged in parallel along the longitudinal direction of the dust collection chamber,
A third striking member extending along the first and second striking members is disposed at an intermediate position between the first and second striking members and at a position in the depth direction of the suction airflow. In the suction tool for an electric vacuum cleaner, a ventilation hole is formed in a side wall of the dust suction chamber and below a vibration region of the first and second striking members so that the ventilation chamber communicates with the dust suction chamber. A suction element for an electric vacuum cleaner, characterized in that a valve element is provided in the ventilation hole so as to project toward the opening side of the suction chamber to open the ventilation hole when a negative pressure in the suction chamber is high. 3. The suction device for an electric vacuum cleaner according to claim 2, wherein the valve element slides and shifts in a thickness direction of a side wall in which the vent hole is formed.