TW201341983A - Photosensitive drum transmission component - Google Patents

Abstract

A kind of photosensitive drum transmission component comprises: a housing used for tightly connecting to a photosensitive drum, a combination component detachably disposed in the housing and a transmission rod driven for rotation by a transmission shaft of a printer; the housing has two bumps and at least a rib to be locked to two locking hooks and at least one locking groove of the combination component, respectively; the combination component further includes a channel and a limit part contained in the channel. The transmission rod has a first end part between the limit part and a bottom part of the housing, a projecting part protruded from the first end part and located in a limit slot of the combination component, and a second end part protruded and extended from the combination component; thereby, the transmission component will have no difficulties to install or to remove even it is mounted in the photosensitive drum for the first time or allows a user to replace it in a new photosensitive drum.

Description

Drum drive assembly

The present invention relates to a photosensitive drum provided in a printer, and more particularly to a transmission assembly of a photosensitive drum.

Please refer to U.S. Patent No. 7,885,575, which provides a transmission assembly of a photosensitive drum in which a transmission rod is disposed in a cylindrical casing by a ball and a pin so that the transmission rod can be opposed to the casing. Swinging in all directions but not rotating, and then fixing a cover to one end of the housing, so that the transmission rod can only move axially within a short distance. Thereby, the transmission rod can be driven by the drive shaft in a printer to rotate a photosensitive drum fixed to the housing.

When the photosensitive drum is damaged, the user can take out the transmission rod together with the ball and the pin from the housing by using the method provided by the aforementioned patent, and then install it into the housing of the new photosensitive drum; however, the above Demolition and installation actions are actually quite difficult to perform.

In fact, due to the aforementioned difficulty in installation, before the photoreceptor drum is shipped, the assembler fixes the housing to the photosensitive drum after the entire assembly of the transmission assembly is assembled, but the position and swing characteristics of the transmission rod are set. The above fixed action is also not easy to perform.

In other words, the transmission assembly of the conventional photosensitive drum, whether it is installed to the photosensitive drum for the first time or when the user is replaced with a new photosensitive roller, has difficulty in mounting or being difficult to disassemble, and therefore remains to be treated. Improve.

In view of the above-mentioned deficiencies, it is a primary object of the present invention to provide a transmission assembly for a photosensitive drum which can effectively improve the absence of the transmission assembly of the conventional photosensitive drum.

To achieve the above object, a drive assembly for a photosensitive drum provided by the present invention includes a housing, a coupling member, and a transmission rod. The housing has a bottom portion and an opening, an inner surface between the opening and the bottom, two protrusions protruding from the inner surface, and at least one rib at the bottom, each of the protrusions having One faces the bottom of the bottom. The coupling member has a first end and a second end, a passage extending from the first end to the second end, an inner wall surface located in the passage, and a limiting slot recessed from the inner wall surface a hook protruding outwardly, at least one card slot recessed from the first end toward the second end, and a limiting portion located in the channel, the limiting slot having a first end In the inlet, the coupling member is disposed in the housing separately from the housing, and the first end of the coupling member faces the bottom of the housing, and the two hooks are respectively engaged with the housing a bottom surface of the bump, the card slot being engaged with the rib of the housing. The transmission rod has a first end portion disposed in the passage of the coupling member, a second end portion projecting from the second end of the coupling member, and at least one projection projecting from the first end portion The first end portion is limited between the limiting portion of the coupling member and the bottom of the housing, and the protruding portion is located in the limiting groove of the coupling member.

Thereby, the transmission rod can be driven by the driving shaft in the printer with the second end portion thereof to drive the coupling member to rotate with the housing, thereby rotating a photosensitive drum fixed to the housing. The photosensitive drum using the transmission assembly is assembled by first coupling the transmission rod and the coupling member, and first fixing the housing to the photosensitive drum, and then coupling the coupling member to the housing, and the transmission The assembly can be easily assembled or separated from the housing by an assembler or user. Therefore, whether it is installed to the photosensitive drum for the first time, or when the user changes the transmission rod and the coupling member to the new photosensitive drum and the housing, the transmission assembly is not difficult to install or difficult. Disassembly problem.

The technical content and features of the present invention will be described in detail below with reference to the accompanying drawings, wherein: FIG. 1 is a perspective view of a first preferred embodiment of the present invention; An exploded perspective view of the first preferred embodiment of the present invention; a third view of the first preferred embodiment of the present invention; and a fourth view of the third embodiment taken along line 4-4; Figure 5 is a perspective view of a joint member of the first preferred embodiment of the present invention; Figure 6 is an end view of the joint member of the first preferred embodiment of the present invention; 7 is a perspective view of the coupling member and a transmission rod of the first preferred embodiment of the present invention; and FIG. 9 is a perspective combination of the transmission rod of the first preferred embodiment of the present invention; FIG. 11 is a cross-sectional view of the first preferred embodiment of the present invention; FIG. 11 is an exploded perspective view of a second preferred embodiment of the present invention; and FIG. A cross-sectional view along section line 12-12; a thirteenth view is an end view of the housing of the second preferred embodiment of the present invention The picture shows a fourteenth present invention is a third preferred embodiment of a perspective exploded view of the embodiment; and a fifteenth invention of the third picture shows an end view of one preferred embodiment according to the housing.

Referring to the first and second figures, the transmission assembly 10 of the photosensitive drum provided by the present invention comprises a housing 20, a coupling member 30, and a transmission rod 40.

As shown in the third and fourth figures, the housing 20 has a bottom portion 22 and an opening 24, an inner surface 26 between the opening 24 and the bottom portion 22, and a support at the center of the bottom portion 22. Portion 27, and two bumps 28 projecting from the inner surface 26. The bottom portion 22 has four ribs 222 that are radially distributed equidistantly. Each of the protrusions 28 has a bottom surface 282 facing the bottom portion 22 and a guiding slope 286 facing the opening 24. The guiding slope 286 and the bottom surface 282 are respectively located on two sides of the top end 288 of the protrusion 28.

As shown in the fifth to seventh embodiments, the coupling member 30 has a first end 31 and a second end 32, a passage 33 extending from the first end 31 to the second end 32, and a The inner wall surface 34 of the channel 33, a wall surface 35 opposite to the inner wall surface 34, and four card slots 36 recessed from the first end 31 toward the second end 32 and open on the inner wall surface 34, a limiting slot 37 recessed from the inner wall surface 34, two limiting portions 38 located in the channel 33 and separated by the two limiting slots 37, and two extending from the second end 32 toward the first end 31 And the elastic portion 39 is inclined outward, and the ends of the two elastic portions 39 respectively have an outwardly protruding hook 392.

As shown in the eighth and ninth figures, the transmission rod 40 includes a body 41, a hollow spherical body 42, and a rod body 43. The body 41 is firstly sleeved with the ball 32 through one end of the coupling member 30 to form a spherical first end portion 44. The rod body 43 passes through the body 41 and the ball body. 42. Combining the two, the two ends of the rod body 43 form two projections 46 extending from the first end portion 44 in opposite directions. The first end portion 44 is located in the channel 33, and the two protruding portions 46 respectively extend into the two limiting slots 37. The transmission rod 40 further has a second end portion 48 of the body 41 protruding from the second end 32 of the coupling member 30.

The limiting portion 38 of the coupling member 30 is for preventing the first end portion 44 of the transmission rod 40 from being disengaged from the passage 33 from the second end 32. In this embodiment, the limiting portion 38 of the coupling member 30 is adjacent to the second end 32 and integrally protrudes from the inner wall surface 34, and each of the limiting portions 38 has a joint with the inner wall surface 34. A limit ramp 382 that slopes inwardly toward the second end 32 (as shown in FIG. 7). As shown in the sixth to eighth embodiments, each of the limiting slots 37 has an inlet 372 at the first end 31 for the projection 46 of the transmission rod 40 to enter, and each of the limiting slots 37 is The inner wall surface 34 and the outer wall surface 35 are penetrated to make each of the protruding portions 46 more easily enter the limiting groove 37. However, the shape of each of the limiting portions 38 is not limited thereto, and each of the limiting slots 37 may not penetrate the outer wall surface 35.

In addition, each of the limiting portions 38 may not be integrally formed on the coupling member 30, but is formed by a limiting member (not shown) disposed at the second end 32 of the coupling member 30, and the transmission is formed. The rod 40 can also be integrally formed.

As shown in the second figure, the coupling member 30 is first coupled to the transmission rod 40, and then mounted to the housing 20 with the first end 31 facing the bottom portion 22 of the housing 20, and the housing The body 20 is previously fixed to one end of a photosensitive drum (not shown). During the combination of the coupling member 30 and the housing 20, the two elastic portions 39 are respectively moved along the guiding slope 286 of the two projections 28, and are elastically deformed to swing inwardly until the two hooks 392 is respectively engaged with the bottom surface 282 of the two protrusions 28 (as shown in FIG. 10), and the card slots 36 are respectively engaged with the ribs 222. As a result, the coupling member 30 is fixed to the housing 20, and the first end portion 44 of the transmission rod 40 is limited between the limiting portion 38 and the bottom portion 22. Therefore, the transmission rod 40 is disposed. The axial movement is only possible within a small distance, and the transmission rod 40 can only be rotated within a small angular range due to the projection 46 being limited by the limiting groove 37. Thereby, the transmission rod 40 can drive the coupling member 30, the housing 20 and the photosensitive drum to rotate when the second end portion 48 is driven by a driving shaft (not shown) in a printer. The guiding slope 286 can also be omitted as needed.

Prior to the use of the photosensitive drum of the transmission assembly 10 provided by the present invention, the assembly of the housing 20 alone to the photosensitive drum is relatively easy to achieve because it is not obstructed by the transmission rod 40. Moreover, the manufacturer can provide the photosensitive drum and the housing 20 that have been fixed to each other for the user to manually remove the old coupling member 30 and the transmission rod 40 to the new housing 20. The assembly member and the coupling member 30 can be easily joined by the assembler or the user by simply inserting the coupling member 30 into the housing 20 with the elastic portion 39 aligned with the projection 28 of the housing 20. In addition, the user can swing the elastic portion 39 of the coupling member 30 into the inner portion of the coupling member 30 by elastically deforming, thereby separating the two hooks 392 from the two projections 28. In other words, whether the first time it is mounted to the photosensitive drum, or when the user replaces the transmission rod 40 and the coupling member 30 with the new photosensitive drum and the housing 20, the transmission assembly 10 does not have any Problems that are difficult to install or difficult to disassemble.

In the first preferred embodiment, the coupling member 30 is capable of being coupled and separated from the housing 20 by the elastic portion 39 which is elastically deformed inwardly. However, the coupling member 30 and the coupling member 30 are The manner in which the housing 20 is coupled is not limited thereto.

For example, referring to FIG. 11 , in the driving assembly of the photosensitive drum provided by the second preferred embodiment, the hook 392 of the coupling member 30 is fixed, and the housing 20 has two elasticity. The two protrusions 28 of the housing 20 for engaging with the hooks 392 are respectively located at the inner edges of the two elastic portions 29 (shown in FIG. 12), and the two elastic portions 29 can be stressed. The two hooks 392 and the two bumps 28 are coupled to each other and separated from each other.

In the first preferred embodiment, the rib 222 of the housing 20 is connected to the outer peripheral surface 272 of the support portion 27 (as shown in the third figure), but does not extend to the inner surface 26, the combination The card slot 36 of the member 30 is disposed on the inner wall surface 34 without penetrating the outer wall surface 35 (as shown in the fifth figure). However, as shown in the eleventh to thirteenth drawings, the rib 222 of the housing 20 may extend from the outer peripheral surface 272 of the support portion 27 to the inner surface 26, and the latching groove 36 of the coupling member 30. The inner wall surface 34 and the outer wall surface 35 may also be penetrated. However, the support portion 27 may not be provided.

Alternatively, as shown in the fourteenth and fifteenth drawings, the rib 222 of the housing 20 may also be coupled to the inner surface 26 without extending to the support portion 27. The outer peripheral surface 272, the latching groove 36 of the coupling member 30 may also be disposed on the outer wall surface 35 without penetrating the inner wall surface 34. Moreover, the housing 20 and the coupling member 30 can also have only two ribs 222 and two slots 36. In fact, the housing 20 and the coupling member 30 only have at least one rib 222 and at least one card. The slot 36 is sufficient.

Finally, it is to be noted that the constituent elements disclosed in the foregoing embodiments are merely illustrative and are not intended to limit the scope of the present invention, and alternative or variations of other equivalent elements should also be the scope of the patent application of the present application. Covered.

10. . . Drum drive assembly

20. . . case

twenty two. . . bottom

222. . . Rib

twenty four. . . Opening

26. . . The inner surface

27. . . Support

272. . . Peripheral surface

28. . . Bump

282. . . Bottom

286. . . Guided slope

288. . . top

29. . . Elastic part

30. . . Joint piece

31. . . First end

32. . . Second end

33. . . aisle

34. . . Inner wall

35. . . Outer wall

36. . . Card slot

37. . . Limit slot

372. . . Entrance

38. . . Limiting department

382. . . Limit slope

39. . . Elastic part

392. . . The hook

40. . . Transmission rod

41. . . Ontology

42. . . Sphere

43. . . Rod body

44. . . First end

46. . . Protrusion

48. . . Second end

The first figure is a perspective assembled view of a first preferred embodiment of the present invention;

The second drawing is an exploded perspective view of the first preferred embodiment of the present invention;

Figure 3 is an end elevational view of the housing of the first preferred embodiment of the present invention;

Figure 4 is a cross-sectional view of the third figure taken along line 4-4;

Figure 5 is a perspective view of a coupling member of the first preferred embodiment of the present invention;

Figure 6 is an end elevational view of the joint of the first preferred embodiment of the present invention;

Figure 7 is a cross-sectional view of the sixth figure taken along line 7-7;

Figure 8 is an exploded perspective view of the coupling member and a transmission rod of the first preferred embodiment of the present invention;

Figure 9 is a perspective assembled view of the transmission rod of the first preferred embodiment of the present invention;

Figure 11 is a cross-sectional view of the first preferred embodiment of the present invention;

11 is an exploded perspective view of a second preferred embodiment of the present invention;

Figure 12 is a cross-sectional view of the housing of Figure 11 taken along line 12-12;

Figure 13 is an end elevational view of the housing of the second preferred embodiment of the present invention;

Figure 14 is an exploded perspective view of a third preferred embodiment of the present invention;

Figure 15 is an end elevational view of the housing of the third preferred embodiment of the present invention.

10. . . Drum drive assembly

20. . . case

twenty four. . . Opening

30. . . Joint piece

31. . . First end

32. . . Second end

33. . . aisle

35. . . Outer wall

37. . . Limit slot

39. . . Elastic part

392. . . The hook

40. . . Transmission rod

44. . . First end

48. . . Second end

Claims (10)

A transmission assembly of a photosensitive drum, comprising: a housing having a bottom portion and an opening, an inner surface between the opening and the bottom, two protrusions protruding from the inner surface, and at least one a rib of the bottom portion, each of the protrusions having a bottom surface facing the bottom portion; a coupling member having a first end and a second end opposite to each other, and a passage extending from the first end to the second end An inner wall surface in the channel, a limiting groove recessed from the inner wall surface, two outwardly protruding hooks, at least one card slot recessed from the first end toward the second end, and a slot a limiting portion in the channel, the limiting slot has an inlet at the first end, the coupling member is separately disposed in the housing from the housing, and the first end of the coupling member faces the shell The bottom of the body is respectively engaged with the bottom surface of the two protrusions of the housing, the card slot is engaged with the rib of the housing; and a transmission rod having a coupling member a first end in the passage, a second end protruding from the second end of the coupling, and a protrusion protruding from the first end portion, the first end portion being limited between the limiting portion of the coupling member and the bottom of the housing, the protruding portion being located at the limit of the coupling member In the bit slot. The transmission assembly of the photosensitive drum of claim 1, wherein the coupling member has an outer wall surface opposite to the inner wall surface, the limiting groove extending through the inner wall surface and the outer wall surface. The transmission assembly of the photosensitive drum of claim 1, wherein the coupling member has two elastic portions extending from the second end toward the first end, and the two hooks are respectively located at the two elastic portions, The two elastic portions are elastically deformed by force, so that the two hooks are separated from the two bumps. The transmission assembly of the photosensitive drum of claim 1, wherein each of the protrusions of the housing has a guiding slope facing the opening of the housing, the guiding slope and the bottom surface being respectively located at the protruding block The two sides of the top. The transmission assembly of the photosensitive drum of claim 1, wherein the housing has two elastic portions, and the two convex portions are respectively located at the two elastic portions, and the two elastic portions are elastically deformed by force, so that The two hooks are separated from the two bumps. The transmission assembly of the photosensitive drum of claim 1, wherein the bottom of the housing has four ribs, the ribs are radially distributed equidistantly, and the coupling has a convex shape and a convex The ribbed card is connected to the four card slot. The transmission assembly of the photosensitive drum of claim 1, wherein the housing further has a support portion at a center of the bottom portion thereof, the support portion having an outer peripheral surface, the convex rib of the housing and the outer peripheral surface The card slot of the coupling member is connected to the inner wall surface. The transmission assembly of the photosensitive drum of claim 7, wherein the rib of the housing is further connected to the inner surface, the coupling member has a card slot with respect to the outer wall surface of the inner wall surface, the coupling member The inner wall surface and the outer wall surface are penetrated. The transmission assembly of the photosensitive drum according to claim 1, wherein the rib of the housing is coupled to the inner surface, and the coupling member has a card slot with respect to the outer wall surface of the inner wall surface. It is attached to the outer wall surface. The transmission assembly of the photosensitive drum of claim 1, wherein the transmission rod comprises a body, a ball disposed at one end of the body to form the first end, and a body passing through the body and the ball a rod body, the two ends of which protrude from the sphere to form two protrusions.