CN102466998A - Transmission assembly of photosensitive drum - Google Patents

Abstract

A transmission assembly of a photosensitive drum comprises a shell, a limiting device which is fixed in the shell and is provided with a channel, and a transmission shaft, wherein the transmission shaft is coaxially corresponding to the channel when positioned at an initial position; therefore, when the photosensitive drum is installed in a printer shell, the transmission shaft can be connected with a driving shaft without the assistance of a guide piece, and the photosensitive drum can rotate stably and smoothly. The transmission assembly of the photosensitive drum disclosed by the invention has the advantages that no guide part is required to be additionally arranged in the casing, and the transmission shaft can be clamped with a driving shaft which can provide rotary kinetic energy in the casing, so that the photosensitive drum can stably and smoothly rotate during action.

Description

Transmission components of the photosensitive drum

technical field

The invention relates to a photosensitive drum arranged in a printer, in particular to a transmission assembly of the photosensitive drum. the

Background technique

The photosensitive drum is one of the most important components in the printer. It is installed in a toner cartridge. It conducts electricity through photosensitive action, and at the same time absorbs toner to develop printed documents. The photosensitive drum mainly includes a photosensitive roller and a transmission assembly located at one end of the photosensitive roller. The transmission assembly is connected to a drive shaft inside the printer casing to transmit the rotational kinetic energy of the drive shaft to the photosensitive drum. scroll wheel. the

The transmission assembly of the existing photosensitive drum is that a transmission shaft is arranged on a housing through a universal joint, and the transmission assembly is fixed on a photosensitive roller with its housing. The transmission shaft protrudes to the outside of the toner box, and is connected with a drive shaft that can provide rotational kinetic energy when the toner box is arranged in a printer casing. Moreover, the universal joint enables the drive shaft to be coaxially corresponding to the photosensitive roller when it is connected to the drive shaft, and can also be inclined in any direction relative to the axial direction; in this way, the user can install the toner cartridge When the drive shaft is inserted into the case to make contact with the drive shaft, the drive shaft can be tilted to a proper position first, and then coaxially engaged with the drive shaft; on the other hand, when the user puts the toner cartridge from the machine When the case is removed so that the drive shaft will be disengaged from the drive shaft, the drive shaft can be tilted back into position while disengaging from the drive shaft. the

In the transmission assembly of the aforementioned existing photosensitive drum, the transmission shaft may tilt in any direction when it is not subjected to an external force, so a guide must be provided inside the casing of the printer so that the transmission shaft passes through the guide. Afterwards, it will be tilted to a proper position and then engaged with the drive shaft; however, the addition of the guide makes the internal mechanism of the printer's casing more complicated and difficult to assemble. In other words, the transmission assembly of the existing photosensitive drum still has its deficiencies and needs to be improved. the

Contents of the invention

In view of the above deficiency, the main purpose of the present invention is to provide a transmission assembly of a photosensitive drum, which can be connected with a drive shaft for providing rotational kinetic energy without being guided by another guide, so that the photosensitive drum The drum spins smoothly and smoothly. the

In order to achieve the above object, the transmission assembly of the photosensitive drum provided by the present invention includes: a housing with a bottom opposite and a housing opening; a limiting device with a coupling member, a plurality of limiting members, and A fixing part, the combining part has a first end surface and a second end surface, and the combining part is fixed in the housing and has a channel, and the channel has a first opening respectively located on the first and second end surfaces and a second opening, the second opening is closer to the bottom of the casing than the first opening, the plurality of limiters are arranged on the joint and can be between a constricted position and a relaxed position relative to the joint Swing, the fixing piece is arranged on the first end surface of the coupling piece, and can prevent each of the limiting pieces from swinging toward the first opening from the shrinking position; a coupling piece has an opening; a transmission shaft can be used in a passage between an initial position and a compressed position is disposed in the coupling part along its axial displacement, and the transmission shaft has a first opening protruding from the passage and a first end of the housing opening, and A second end located in the passage, the connecting piece is sleeved on the second end of the transmission shaft through the opening, and the connecting piece is closer to the second opening of the passage than the plurality of limiting pieces, the When the transmission shaft is at the initial position, the coupling member pushes against the plurality of limiting members toward the first opening of the channel, so that the plurality of limiting members are located at the constricted position and limit the axial direction of the transmission shaft to be roughly in line with the direction of the channel. Axial coaxial correspondence, and when the transmission shaft is in the compressed position, each of the limit members can swing to the relaxed position, so that the transmission shaft can be inclined relative to the channel; and an elastic member is arranged on the bottom of the housing and the Between the couplings, the transmission shaft is kept at the initial position in normal state. the

The transmission assembly can form a photosensitive drum through its housing arranged at one end of a photosensitive roller. When the photosensitive drum is placed in the printer, when the first end of the transmission shaft is in contact with a drive shaft axially parallel , the transmission shaft will first be pushed by the drive shaft and move axially to the compressed position, and then, when the transmission shaft is coaxially opposed to the drive shaft, the transmission shaft will move axially toward the initial position and be aligned with the On the contrary, when the photosensitive drum is pulled out of the printer, the transmission shaft is moved to the compressed position by the abutment of the drive shaft, and at the same time, it is inclined relative to the channel of the joint, thereby releasing the card with the drive shaft relationship. the

Thereby, the effect of the present invention lies in that the drive shaft can be engaged with a drive shaft that can provide rotational kinetic energy in the casing without additionally being provided with a guide piece in the casing, so that the photosensitive drum can function rotates smoothly and smoothly. the

The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments, but not as a limitation of the present invention. the

Description of drawings

Fig. 1 is the three-dimensional exploded view of the transmission assembly of the photosensitive drum provided by a preferred embodiment of the present invention;

Fig. 2 is the three-dimensional assembly diagram of the transmission assembly of the photosensitive drum provided by this preferred embodiment of the present invention;

Fig. 3 is the side view of the transmission assembly of the photosensitive drum provided by this preferred embodiment of the present invention;

Fig. 4 is the sectional view of Fig. 3 along the section line 4-4;

Fig. 5 is a side view of a casing of the transmission assembly of the photosensitive drum provided by this preferred embodiment of the present invention;

Figures 6 to 8 are schematic diagrams of the engagement process between a transmission shaft of the photosensitive drum transmission assembly provided by the preferred embodiment of the present invention and a drive shaft provided in the printer housing; and

FIG. 9 to FIG. 10 are schematic diagrams of the separation process of the transmission shaft and the drive shaft of the transmission assembly of the photosensitive drum provided by the preferred embodiment of the present invention. the

Among them, reference signs

Transmission assembly of photosensitive drum 10 Limiting device 12

Elastic 14

Combining piece 20 First end face 21

The second end face 22 card slot 222

Channel 23 First opening 231

Second opening 232 Positioning groove 24

Buckle part 26 Buckle hole 27

Mounting groove 28 Groove 29

Limiting part 30 Installation part 32

Limiting part 34 Connecting rod 36

Limit range 38 Neck position P1

Relaxed position P4

Fixing piece 40 Ring part 42

Buckle 44

drive shaft 50 first end 51

second end 52 end face 53

groove 54 guide block 55

Guide surface 552 Engaging groove 554

Clamping block 56 Through hole 57

Body 58 Initial position P2

Compression position P3

Connecting piece 60 Opening hole 62

Snap-in hole 64 Perforation 66

rod body 70

Housing 80 Housing Opening 82

Bottom 84 Fixed part 86

convex rib 87 bump 88

Drive shaft 90 Inclined surface 92

Snap lever 94

Detailed ways

Cooperate accompanying drawing by enumerated embodiment below, describe technical content and feature of the present invention in detail, wherein:

Fig. 1 is the three-dimensional exploded view of the transmission assembly of the photosensitive drum provided by a preferred embodiment of the present invention;

Fig. 2 is the three-dimensional assembly diagram of the transmission assembly of the photosensitive drum provided by this preferred embodiment of the present invention;

Fig. 3 is the side view of the transmission assembly of the photosensitive drum provided by this preferred embodiment of the present invention;

Fig. 4 is the sectional view of Fig. 3 along the section line 4-4;

Fig. 5 is a side view of a casing of the transmission assembly of the photosensitive drum provided by this preferred embodiment of the present invention;

Figures 6 to 8 are schematic diagrams of the engagement process between a transmission shaft of the photosensitive drum transmission assembly provided by the preferred embodiment of the present invention and a drive shaft provided in the printer housing; and

FIG. 9 to FIG. 10 are schematic diagrams of the separation process of the transmission shaft and the drive shaft of the transmission assembly of the photosensitive drum provided by the preferred embodiment of the present invention. the

Please refer to Fig. 1 to Fig. 4 first, the transmission assembly 10 of the photosensitive drum provided by a preferred embodiment of the present invention includes a limiting device 12 composed of a coupling part 20, four limiting parts 30 and a fixing part 40 , a transmission shaft 50 , a coupling member 60 , a rod body 70 , a housing 80 , and an elastic member 14 . the

The connecting member 20 is approximately cylindrical, has a first end surface 21 and a second end surface 22 opposite to each other, and a channel 23 passing through the first and second end surfaces 21 , 22 . The first end face 21 has four notches and four blocks distinguished by the four notches, wherein two opposite notches extend a considerable distance toward the second end face 22 to form a positioning groove 24 respectively, and the other two opposite notches face toward the second end face 22. The slots formed by the extension of the second end surface 22 respectively have a fastening portion 26 , and each fastening portion 26 has a through fastening hole 27 on the left. The four blocks of the first end surface 21 are respectively recessed with a relatively small installation groove 28 and a relatively deep groove 29 adjacent to the installation groove 28 . Each of the grooves 29 is open towards the channel 23 . The second end surface 22 also has four engaging grooves 222 recessed toward the first end surface 21 , the positions of which roughly correspond to the plurality of grooves 29 . The channel 23 has a first opening 231 and a second opening 232 respectively located on the first end surface 21 and the second end surface 22 . the

Each of the limiting parts 30 is generally in the shape of an "I", and has a straight mounting part 32, a curved limiting part 34, and a connecting part between the mounting part 32 and the limiting part 34. Connecting rod 36. The installation parts 32 of the plurality of limiting parts 30 are respectively arranged in the installation grooves 28 of the coupling part 20, and the limiting parts 34 of the plurality of limiting parts 30 are located in the channel 23 of the coupling part 20, and in the A confinement 38 is formed in the channel 23 . The connecting rod 36 of each limiting member 30 can swing in the groove 29 of the coupling member 20, so that the limiting part 34 can move in the channel 23, whereby the size of the limiting range 38 will vary with the size of each limiting part. The movement of the bit part 34 changes. the

The fixing member 40 has an annular portion 42 , and two fastening portions 44 perpendicular to and radially extending from the annular portion 42 . The two fastening portions 44 are respectively fastened to the two fastening holes 27 of the coupling member 20 , so that the ring portion 42 is attached to the first end surface 21 of the coupling member 20 and covers the plurality of installation slots 28 . The annular portion 42 not only restricts the mounting portion 32 of each of the limiting members 30 in the mounting groove 28, but also prevents each of the connecting rods 36 from swinging toward the first opening 231 of the channel 23; in other words, each of the limiting members 30 It can only swing toward the second opening 232 of the channel 23 from a narrowing position P1 where the connecting rod 36 is perpendicular to the axial direction of the channel 23 . It is worth mentioning that the fixing part 40 can also be integrally formed with the connecting part 20, and each of the limiting parts 30 is made of elastically deformable material, so that the mounting part of each of the limiting parts 30 32 can still be installed into the installation groove 28 through the groove 29; in other words, the fixing member 40 can cover the plurality of installation grooves 28 and prevent each of the limiting members 30 from the narrowing position P1 toward the first opening The swinging structure of 231 is not limited to the aspects provided in this embodiment. the

The transmission shaft 50 has a first end portion 51 and a second end portion 52; the first end portion 51 has an end face 53, a groove 54 recessed from the center of the end face 53, and two The guide blocks 55 integrally protrude from opposite side edges, and each guide block 55 has a guide surface 552 connected with the outer edge of the first end portion 51 , and an engaging joint located on one side of the guide surface 552 . Slot 554 ; the second end portion 52 has two engaging blocks 56 extending longitudinally and a through hole 57 extending radially. The second end 52 of the transmission shaft 50 is located in the passage 23, and a body 58 of the transmission shaft 50 connected between the first and second ends 51, 52 is located within the limit range 38. the

The connecting member 60 is roughly in the shape of a hollow sphere, but has an opening 62 , two engagement holes 64 opposite to the opening 62 , and two through holes 66 perpendicular to the opening 62 and opposite to each other. The coupling piece 60 is disposed in the channel 23, and is sleeved on the second end portion 52 of the transmission shaft 50 through the opening 62, and the two clamping blocks 56 of the transmission shaft 50 are respectively clamped on the coupling piece 60. The two clamping holes 64, so that the coupling piece 60 is closer to the second opening 232 of the channel 23 than the plurality of limiting pieces 30, and is fixed with the transmission shaft 50, and the two through holes 66 are connected with the transmission shaft. The through hole 57 of the shaft 50 communicates. the

The rod body 70 is passed through the through hole 57 of the transmission shaft 50 and the two through holes 66 of the coupling member 60, and the two ends of the rod body 70 respectively protrude from the two through holes 66, and are respectively arranged on the coupling member. 20 in the two positioning grooves 24. Limited by the width of each positioning slot 24 , the transmission shaft 50 can only rotate within a small angle range relative to the connecting member 20 . Thereby, the transmission shaft 50 can rotate together with the coupling part 20 . the

The casing 80 has a casing opening 82 and a bottom 84 opposite to each other, and a fixing portion 86 near the bottom 84 and having a plurality of regularly distributed square grooves on the outer surface. In addition, as shown in FIG. 5 , the casing The inner side of body 80 has four protruding ribs 87 and two protruding blocks 88, wherein, each of these protruding ribs 87 and the other two of these protruding ribs 87 are respectively separated by a small angle and a large angle, and each of these protruding blocks 88 is located at two intervals between the two protruding ribs 87. between the ribs 87 with a smaller angle. the

The elastic member 14 is a compression spring, which is set in the housing 80 together with the assembled limiting device 12, the transmission shaft 50, the coupling member 60 and the rod body 70. Engaged with the rib 87 of the housing 80, so that the two fastening parts 26 can be engaged with the two protrusions 88 of the housing 80, so as to combine the joint 20 with the housing 80. The elastic Two ends of the component 14 push against the bottom 84 of the casing 80 and the connecting component 60 respectively. In this way, the transmission shaft 50 , the coupling member 60 and the rod body 70 can linearly move relative to the casing 80 as the elastic member 14 scales; in addition, the first end 51 of the transmission shaft 50 protrudes out of the channel 23 The first opening 231 of the housing and the housing opening 82 are located outside the housing 80 . the

When the aforementioned transmission assembly 10 is not subjected to external force, the coupling member 60 is pushed against by the elastic member 14 and faces the first opening 231 of the channel 23 against the plurality of limiting members 30, so that the transmission shaft 50 is positioned at An initial position P2 farthest from the bottom 84 of the casing 80, at this time, each of the limiting members 30 is located at the converging position P1, and the limiting portions 34 of the plurality of limiting members 30 form the smallest limiting range 38, is roughly the same as the cross-sectional area of the body portion 58 of the transmission shaft 50, therefore, the axial direction of the transmission shaft 50 limited by the plurality of limiting members 30 is substantially coaxial with the axial direction of the channel 23 of the coupling member 20 Correspondingly, that is to say, the central axis of the transmission shaft 50 is located on the same straight line as the central axis of the passage 23. If the transmission shaft 50 is subjected to a lateral thrust (that is, a radial thrust) at this time, the transmission shaft 50 is almost Can't tilt. the

When the transmission shaft 50 is subjected to an external force (that is, an axial external force) parallel to the passage 23 and toward the second opening 232, the transmission shaft 50 will move toward the second opening 232 to a compression position P3 (as shown in FIG. 7 shown), and at the same time drive the connecting member 60 to compress the elastic member 14. At this time, the plurality of position-limiting members 30 can swing toward the bottom 84 of the housing 80 to a relaxed position P4 because they are not abutted by the connecting member 60 (As shown in FIG. 9 ), at the same time, if the transmission shaft 50 is subjected to a lateral thrust, the transmission shaft 50 can be inclined relative to the channel. And when the axial external force applied to the transmission shaft 50 is released, the transmission shaft 50 will return to the initial position P2 due to the elastic return force provided by the elastic member 14 . the

The transmission assembly 10 of the aforementioned photosensitive drum provided by the present invention is used to be arranged on one end of a photosensitive drum (not shown in the figure) through the fixing portion 86 of its casing 80 to form a photosensitive drum, which is used to be arranged on a The toner cartridge of the printer (not shown in the figure), and the first end 51 of the transmission shaft 50 protrudes from one end of the toner cartridge. the

Please refer to Fig. 6, when the user installs the aforementioned toner cartridge in the casing (not shown in the figure) of a printer, the drive shaft 50 is used to engage with a drive shaft 90 located in the casing combine. Before the transmission shaft 50 is in contact with the drive shaft 90, the transmission shaft 50 is at the initial position P2 and its axial direction is parallel to the drive shaft 90. As the toner cartridge is installed, the transmission assembly 10 will be perpendicular to the drive shaft. The axial direction of the shaft 90 moves toward the drive shaft 90 . When the drive shaft 50 is in contact with the drive shaft 90 with its first end 51, the drive shaft 90 may slide over the end face 53 without touching the guide block 55, or, as shown in FIG. 7, The inclined surface 92 of the drive shaft 90 will slide over the guide surface 552 of a guide block 55; no matter what the aforementioned situation is, the transmission shaft 50 will be subjected to axial thrust and move linearly towards the bottom 84 of the housing 80 to the compressed position P3, and compress the elastic member 14 at the same time, and because the transmission shaft 90 is restricted by a protrusion (not shown) on the toner cartridge, it will not be inclined relative to the channel 23 of the coupling member 20, because the protrusion It belongs to the prior art and cannot be described in detail. the

As shown in Figure 8, when the toner cartridge continues to move so that the transmission shaft 50 is coaxially corresponding to the drive shaft 90, the drive shaft 90 will extend into the groove 54, and at this time, the transmission shaft 50 will be immediately affected by the drive shaft 90. The elastic return force of the elastic member 14 acts to return to the initial position P2. Afterwards, when the drive shaft 90 rotates, the two engagement rods 94 will engage with the engagement grooves 554 of the two guide blocks 55 respectively, so that the transmission assembly 10 and the photosensitive drum can be connected with the drive Shaft 90 rotates synchronously. the

When the user takes out the toner cartridge from the inside of the printer's casing, the drive shaft 90 may directly slide over the end face 53 without touching the guide block 55 of the transmission shaft 50, or, as shown in Figure 9 , the inclined surface 92 of the drive shaft 90 will be in contact with a guide block 55; no matter what kind of situation is mentioned above, the drive shaft 50 will be abutted by the drive shaft 90, on the one hand, the drive shaft 50 will face the bottom of the housing 84, so that each restricting member 30 can swing to the relaxed position P4 because it is no longer supported by the coupling member 60. On the other hand, the transmission shaft 50 will be inclined due to being pulled by the drive shaft, which is convenient for release. The engagement relationship with the drive shaft 90 (as shown in FIG. 10 ). the

Through the transmission assembly 10 of the aforementioned photosensitive drum provided by the present invention, when the user loads the toner cartridge into the casing of the printer, the transmission shaft 50 can be smoothly connected with the drive in the casing without the assistance of a guide. The shaft 90 is engaged, and when the user takes out the toner cartridge from the printer casing, the transmission shaft 50 can be tilted and disengaged from the transmission shaft 50 smoothly. In this way, there is no need to arrange guide pieces in the printer casing, and it has the advantages of simple structure, low assembly and manufacturing costs, and fast process. the

Finally, it must be stated again that the constituent components disclosed in the foregoing embodiments of the present invention are only for illustration and are not intended to limit the scope of this case. The substitution or change of other equivalent components should also fall within the scope of the claims of this case. covered. the

Certainly, the present invention also can have other multiple embodiments, without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding changes and deformations according to the present invention, but these corresponding Changes and deformations should belong to the scope of protection of the appended claims of the present invention. the

Claims (9)

1. the transmission component of a photosensitive drums is characterized in that, includes:

One housing has a relative bottom and a shell nozzle;

One stop means; Have: a conjunction, a plurality of locating part and a fixture; This conjunction has one first end face and one second end face; This conjunction is fixed in this housing and has a passage, and this passage has one first opening and one second opening that lays respectively at this first end face, second end face, and this second opening is than the bottom of this first opening near this housing; These a plurality of locating parts be located at this conjunction and relatively this conjunction contract in one and swing between bundle position and the release position; This fixture is located at first end face of this conjunction, and can stop respectively this locating part by the bundle position of contracting towards this first opening swing;

One connecting piece has a perforate;

One transmission shaft; Can between an initial position and a compression position, being located at the passage of this conjunction axially along it; And this transmission shaft has one and protrudes out first opening of this passage and the first end of this shell nozzle; And one be arranged in this passage the second end, this connecting piece is socketed on the second end of this transmission shaft with this perforate, and this connecting piece these a plurality of locating parts near second opening of this passage; When this transmission shaft is positioned at initial position; This connecting piece is towards these a plurality of locating parts of first opening pushing and pressing of this passage; Make these a plurality of locating parts be positioned at this contract the bundle position and limit this transmission shaft axially and this passage axial coaxial corresponding; And this transmission shaft is when being positioned at compression position, and respectively this locating part is rocked to release position, cause this transmission shaft relatively this passage tilt; And

One elastic component is located between the bottom and this connecting piece of this housing, makes this transmission shaft when normality, remain on this initial position.

2. the transmission component of photosensitive drums according to claim 1 is characterized in that, first end face of this conjunction is concaved with a plurality of mounting grooves, and a plurality of groove that is close to these a plurality of mounting grooves respectively, and respectively this groove is open shape towards this passage; And respectively this locating part has a connecting link, and an installation portion and a limiting section of being located at these connecting link two ends respectively, and these a plurality of installation portions are located at respectively in the mounting groove of this conjunction, and these a plurality of connecting links are respectively at swinging in these a plurality of grooves.

3. the transmission component of photosensitive drums according to claim 1 is characterized in that, this conjunction has two snapping portions, and two snapping portions of this conjunction are buckled in two inboard projections of this housing.

4. the transmission component of photosensitive drums according to claim 3 is characterized in that, this conjunction have a plurality of from this second end face the draw-in grooves towards first sunken end face, this housing inboard has a plurality of fins, these a plurality of draw-in grooves respectively with these a plurality of fin clampings.

5. the transmission component of photosensitive drums according to claim 1; It is characterized in that; This conjunction has two snapping holes; And this fixture has an annulus portion and two snapping portions, and this annulus portion amplexiforms in first end face of this conjunction and covers in this a plurality of mounting grooves, and two snapping portions of this fixture are buckled in this two snappings hole of this conjunction respectively.

6. the transmission component of photosensitive drums according to claim 1; It is characterized in that; This conjunction has two from the locating slot of this first end face towards second sunken end face; The second end of this transmission shaft is equipped with vertical its axial body of rod, and two ends of this body of rod are located at two locating slots of this conjunction respectively.

7. the transmission component of photosensitive drums according to claim 6 is characterized in that, this connecting piece has the perforation of two vertical these perforates, and the second end of this transmission shaft has a through hole, and this body of rod passes two perforation of this connecting piece and the through hole of this transmission shaft.

8. the transmission component of photosensitive drums according to claim 1 is characterized in that, this connecting piece has two blocked holes relative with this perforate, and the second end of this transmission shaft has two clamping blocks, and this two clamping block is arranged in two blocked holes of this connecting piece respectively.

9. the transmission component of photosensitive drums according to claim 1; It is characterized in that; The first end of this transmission shaft has an end face, a groove from this end face concavity; And two guiding blocks of protruding out from this end face, respectively this guiding block has the guiding face that is connected with this first end outer rim, and one be positioned at this guiding face one side slot.

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