TW201502724A - Transmission assembly of photosensitive drum - Google Patents

Abstract

The utility model provides a transmission assembly of a photosensitive drum. A transmission shaft is arranged in a sleeve, and can simultaneously move and rotate, the sleeve and an elastic part are arranged in a shell, and elastic force is provided to the sleeve and the transmission shaft by virtue of the large-diameter section and the small-diameter section of the elastic part, respectively; the transmission shaft is provided with two clamping blocks and an accommodating space between the two clamping blocks; each clamping block is provided with an inclined outer side surface, an inner side surface, an inclined top surface at the joint of the inner and outer side surfaces, and a hooking slot; the hooking slots of the two clamping blocks are opposite to each other, and two bosses of a drive shaft of an electronic imaging device are clamped in the two hooking slots, respectively; therefore, the transmission assembly can be smoothly connected with and separated from the drive shaft of the electronic imaging device in a mode different from a known way.

Description

Drum drive assembly

The present invention relates to a photosensitive drum provided in an electronic image forming apparatus (e.g., a printer, a photocopier, etc.), and more particularly to a transmission assembly of a photosensitive drum.

The photosensitive drum is one of the most important components in the electronic imaging device, and is disposed in a toner cartridge to conduct electricity by sensitization, while adsorbing the toner to visualize the printed document. The photosensitive drum mainly comprises a photosensitive roller and a transmission component disposed at one end of the photosensitive roller. The transmission component is connected to a driving shaft disposed inside the casing of the electronic imaging device for transmitting the rotational kinetic energy of the driving shaft to The photosensitive roller.

The conventional drum assembly includes a transmission member that can be engaged with the drive shaft, and most of the transmission members are designed to be biased by the drive shaft (for example, as provided in US Pat. No. 8,295,734), or The transmission member can be driven by the drive shaft and axially displaced (for example, as provided by the continental utility model patent CN201532527U), so that the transmission member can automatically drive the toner cartridge when the user loads the toner cartridge into the electronic imaging device. The shaft is snapped and automatically disengaged from the drive shaft when the user removes the toner cartridge from the electronic imaging device.

However, the construction of the transmission assembly of the photosensitive drum, such as the yaw design and the axial displacement design described above, is complicated, and thus it is difficult to manufacture and assemble.

In view of the above-mentioned deficiencies, it is an object of the present invention to provide a transmission assembly for a photosensitive drum which is different from the conventional one in connection with the drive shaft of the electronic imaging device, and which is relatively simple in construction.

Another object of the present invention is to provide a transmission assembly of a photosensitive drum which can be firmly coupled with a drive shaft of an electronic image forming apparatus and can be smoothly detached.

In order to achieve the above object, the driving assembly of the photosensitive drum provided by the present invention is configured to be engaged with a driving shaft of an electronic imaging device, the driving shaft has two protrusions, and the transmission assembly includes There is a drive shaft, a sleeve, a casing, and an elastic member. The transmission shaft includes a shaft and a snapping structure, the shaft extends along an imaginary axis and has a first end facing the first direction and a second end facing the second direction opposite to the first direction. And at least one protrusion extending radially from the shaft, the snap structure having a base connected to the first end of the shaft, and two opposite sides from the opposite sides of the base away from the imaginary axis a latching block extending in a direction, and an accommodating space between the two latching blocks for accommodating the driving shaft, each of the latching blocks having a first direction toward the outer side of the imaginary axis, An inner side surface facing the accommodating space, a sloping top surface at the intersection of the outer side surface and the inner side surface, a hooking groove at the intersection of the outer side surface and the inner side surface, and a slanted top surface a top end of the hooking slot, wherein the angle between the inclined top surface and the imaginary axis is not equal to 90 degrees, and the opening of the hooking slot of the two latching blocks is substantially opposite to the direction for the driving The two protrusions of the shaft extend into the hook slot through the opening . The sleeve has a body, a shaft hole extending through the body along the imaginary axis, and at least one through slot disposed in the body and communicating with the shaft hole, the shaft of the transmission shaft being rotatable and axially movable Provided in the shaft hole, the through slot is inclined with respect to the imaginary axis, and the inclined top surface of the through slot and the snap block of the transmission shaft extends obliquely in a first direction along a same rotation direction, the axis The lug of the rod movably extends into the slot. The outer casing has a tubular body, a top wall on one side of the tubular body, a bottom wall on the other side of the tubular body, and a receiving hole extending along the imaginary axis, the tubular body being used for One end of the photosensitive drum is open to the top wall and extends into the sleeve body, so that the sleeve cannot rotate but can be movably coupled to the outer casing along the imaginary axis. The elastic member has a large diameter section and a small diameter section connected to each other, and the large diameter section is disposed on the receiving hole of the outer casing and abuts against the bottom surface of the outer casing and the sleeve respectively at the two ends thereof, the small The diameter section is disposed on the shaft hole of the sleeve and abuts one end of the shaft at the second end of the shaft of the transmission shaft.

Therefore, the structure of the transmission assembly of the photosensitive drum provided by the present invention is simpler than that of the conventional one, and the locking structure of the transmission shaft can be the two-column card of the driving shaft of the two hook card slots and the electronic imaging device. Connected, and then driven by the drive shaft. In addition, when the user wants to connect the transmission assembly to the drive shaft of the electronic imaging device, and the drive assembly is to be separated from the drive shaft of the electronic imaging device, the drive shaft can be subjected to the electronic imaging device with its snap-fit structure. The drive shaft is pushed to move along the shaft hole of the sleeve, and at the same time, the drive shaft is also rotated by the pin and the slot of the sleeve, so that the drive shaft is moved and rotated simultaneously Electronic imaging device The drive shafts are firmly connected and smoothly detached.

10,12,14,16‧‧‧Dynamic drum drive assembly

20‧‧‧ drive shaft

30, 30', 30" ‧ ‧ sleeve

32, 32’‧‧‧ Ontology

322‧‧‧Axis hole

324‧‧‧through slot

325‧‧‧ bottom

326‧‧‧ trench

327‧‧‧Flexible blocks

328‧‧‧ Large diameter section

328a‧‧‧ Limit Ditch

329‧‧‧Small path

34‧‧‧Bump

36‧‧‧ convex

40‧‧‧ latch

50‧‧‧Flexible parts

51‧‧‧ Large diameter section

52‧‧‧Small path

51’‧‧‧First elastic parts

52’‧‧‧Second elastic parts

60, 60', 60" ‧ ‧ shell

61‧‧‧ accommodating holes

62‧‧‧Installation slot

63‧‧‧Limited slot

64, 64', 64" ‧ ‧ top wall

642‧‧‧ trench

644‧‧‧Flexible blocks

646‧‧‧

65, 65’‧‧‧ bottom wall

652‧‧‧ embedded block

66, 66’‧‧‧ body

662‧‧‧ embedded card slot

67‧‧‧Combination

671‧‧‧ joint slot

672‧‧‧Top

673‧‧‧ trench

674‧‧‧Flexible blocks

675‧‧‧through slot

68‧‧‧Limit blocks

70‧‧‧ shaft

71‧‧‧ first end

72‧‧‧ second end

73‧‧‧ jack

74‧‧‧ rod body

80‧‧‧Card structure

81‧‧‧ base

82, 82A, 82B‧‧‧ card block

821‧‧‧Top

822‧‧‧Sloping top surface

823‧‧‧Check card slot

823a‧‧‧ recess

823b‧‧‧ Limiting surface

824‧‧‧ inside side

825‧‧‧ outside side

84‧‧‧guide block

842‧‧‧ Guided slope

86‧‧‧ accommodating space

90‧‧‧Drive shaft

92‧‧‧Bump

L‧‧‧ imaginary axis

D1‧‧‧ first direction

D2‧‧‧ second direction

1 is a perspective assembled view of a transmission assembly of a photosensitive drum according to a first preferred embodiment of the present invention; and FIG. 2 is a perspective exploded view of a transmission assembly of the photosensitive drum provided by the first preferred embodiment of the present invention; Figure 3 is a plan view showing a transmission shaft of a transmission assembly of the photosensitive drum according to the first preferred embodiment of the present invention; Fig. 4 is a cross-sectional view taken along line 4-4 of Fig. 3; A perspective view of a transmission shaft of a transmission assembly of a photosensitive drum according to the first preferred embodiment of the present invention; and a sixth perspective view of a housing of a transmission assembly of the photosensitive drum according to the first preferred embodiment of the present invention; Figure 7 is a perspective cross-sectional view showing the outer casing of the transmission assembly of the photosensitive drum provided by the first preferred embodiment of the present invention; Figure 8 is a cross-sectional view taken along line 8-8 of Figure 1; Figure 9 to Figure 12 BRIEF DESCRIPTION OF THE DRAWINGS FIG. 13 is a perspective view showing a process of connecting a transmission assembly of a photosensitive drum provided by the first preferred embodiment to a driving shaft; FIGS. 13 and 14 are respectively provided for the first preferred embodiment of the present invention. End view and side view of the driving assembly of the photosensitive drum and the driving shaft Figure 15 is similar to Figure 13 except that the transmission assembly of the photosensitive drum provided by the first preferred embodiment of the present invention begins to detach from the drive shaft; Figures 16 through 19 are similar. Figure 14 shows only the first preferred embodiment of the present invention FIG. 20 is a perspective view of the transmission assembly of the photosensitive drum provided by a second preferred embodiment of the present invention; FIG. 21 is the second embodiment of the present invention The perspective view of the transmission assembly of the photosensitive drum provided by the preferred embodiment; Fig. 22 is similar to Fig. 20, except that one of the transmission components of the photosensitive drum is removed for explanation; 3 is a perspective view showing a part of a casing of a transmission assembly of a photosensitive drum provided by the second preferred embodiment of the present invention; and FIG. 24 is a perspective view showing a transmission assembly of a photosensitive drum provided by a third preferred embodiment of the present invention; Figure 25 is a cross-sectional view taken along line 25-25 of Figure 23; Figure 26 is a cross-sectional view taken along line 26-26 of Figure 23; and Figure 27 is a fourth preferred embodiment of the present invention. A cross-sectional view of the drive assembly of the photosensitive drum provided.

Referring to FIG. 1 and FIG. 2, a transmission assembly 10 for a photosensitive drum according to a first preferred embodiment of the present invention includes a transmission shaft 20, a sleeve 30, an elastic member 50, and a housing 60.

The drive shaft 20 includes a shaft 70 and a snap-fit structure 80. The shaft 70 includes a cylindrical body 74 and a pin 40 extending along an imaginary axis L and having a first end 71 facing the first direction D1, and an orientation and a first direction D1. The second end 72 of the opposite second direction D2, and a receptacle 73 extending radially through the shaft 70. The snap-fit structure 80 has a base portion 81 integrally connected to the first end 71 of the shaft 70, a two-larger snap-in block 82 integrally connected to the base portion 81, and two smaller guide blocks. 84, and an accommodation space 86 between the two card connectors 82.

The two latching blocks 82 extend away from the imaginary axis L and in the first direction D1 from opposite sides of the base portion 81 (upper side and lower side in FIG. 2). As shown in FIG. 3 to FIG. 5, each of the latching blocks 82 has a side 825 that gradually approaches the imaginary axis toward the first direction D1, an inner side 824 that faces the accommodating space 86, and one that is located outside. An inclined top surface 822 at the intersection of the side surface 825 and the inner side surface 824, a hooking groove 823 at the intersection of the outer side surface 825 and the inner side surface 824, and a between the inclined top surface 822 and the hooking groove 823 The top end 821, wherein the angle between the inclined top surface 822 and the imaginary axis L is about 50 to 70 degrees, and the opening of the hooking groove 823 of the two latching blocks 82 is substantially opposite to the opposite direction (in FIG. 2) The middle is toward the left and right). Each of the hook slots 823 has a concave portion 823a in a circular arc shape, and a limiting surface 823b between the concave portion 823a and the top end 821. The limiting surface 823b is substantially from the top end 821 toward the inclined top. The direction of the face 822 extends obliquely.

The two guiding blocks 84 are respectively extended from the other opposite sides of the base portion 81 (the left side and the right side in FIG. 2). As shown in FIGS. 3 and 5, each of the guiding blocks 84 is provided. There is a guiding bevel 842 which is inclined with respect to the imaginary axis L of the shaft 70, and each of the guiding bevels 842 gradually approaches the imaginary axis L toward the first direction D1.

Referring to FIG. 2 , the sleeve 30 includes a body 32 , a shaft hole 322 extending through the body 32 along the imaginary axis L, and a through slot 324 disposed in the body 32 and communicating with the shaft hole 322 (FIG. Only one of the through slots 324 is shown, the opposite position is provided with another through slot 324), and two protrusions 34 projecting outwardly from the body 32, each of the through slots 324 being opposite the imaginary axis L The inclined top surface 822 of each of the through grooves 324 and each of the engaging blocks 82 is inclined to extend in the first direction D1 in the same rotational direction (the clockwise direction when viewed in the second direction D2). The shaft 70 of the transmission shaft 20 is rotatably and axially movably disposed in the shaft hole 322. The bolt 40 is inserted into the insertion hole 73 of the transmission shaft 20, so that the shaft 70 of the transmission shaft 20 has Two protrusions 75 extending radially (the ninth figure shows one of the protrusions 75, the other position of which has another protrusion 75), and the two protrusions 75, that is, the part of the pin 40 protruding from the insertion hole 73 The two protrusions 75 are movably disposed through the two through slots 324 respectively.

It should be noted that the insertion hole 73 of the transmission shaft 20 may not penetrate the shaft 70. In this case, the shaft 70 of the transmission shaft 20 only has a protrusion 75, so the sleeve 30 only needs to be provided. There is a slot 324. Moreover, the bump 75 of the shaft 70 is not limited to the insertion of the pin 40 The hole 73 is formed and can be integrally formed to protrude. In this case, the through slot 324 needs to have an open end for the protrusion 75 to enter, and the shaft 70 needs to be provided with an annular cover to close the through slot 324. The open end.

Referring to FIGS. 2, 6 and 7, the outer casing 60 has a tubular body 66, a top wall 64 on one side of the tubular body 66, and a bottom wall 65 on the other side of the tubular body 66. The outer shape of the outer casing 60 is similar to that of the conventional one. The inner portion of the outer casing 60 has a receiving hole 61, a mounting groove 62 and a second limiting groove 63. (Figure 7 shows only one of the limiting slots. 63, the opposite position is provided with another limiting slot 63). The accommodating hole 61 extends along the imaginary axis L and is open to the top wall 64 . The mounting groove 62 extends from the accommodating hole 61 in opposite radial directions and is open to the top wall 64 . The two limiting slots 63 are adjacent to the mounting slot 62 and extend parallel to the imaginary axis L, and the two limiting slots 63 are not open to the top wall 64.

Referring to FIG. 2 and FIG. 8 , the elastic member 50 has a large diameter section 51 and a small diameter section 52 connected to each other. The elastic member 50 and the sleeve 30 are sequentially mounted to the housing 60 . In the hole 61, when the sleeve 30 is mounted, the small diameter section 52 is firstly disposed in the shaft hole 322 of the sleeve 30, and then the body 32 enters the receiving hole 61, and the two protrusions 34 are simultaneously made. Entering the mounting groove 62, the force of the sleeve 30 along the imaginary axis L must be applied, so that the large diameter section 51 is elastically compressed and abuts against the sleeve 30 and the bottom of the outer casing 60 at both ends thereof. The wall 65, and the small diameter section 52 is also elastically compressed and abuts against the second end 72 of the shaft 70 of the transmission shaft 20, thereby causing the large and small diameter sections 51, 52 to be generated along the imaginary axis L. Then, the sleeve 30 is rotated to cause the two protrusions 34 to enter the two limiting slots 63 respectively, thereby confining the sleeve 30 to the outer casing 60; finally, the function of the sleeve 30 is released. The force causes the sleeve 30 to be abutted against the outer casing 60 as shown in Fig. 8 by the elastic force of the large diameter section 51. As such, the sleeve 30 is non-rotatable but is movably coupled to the outer casing 60 along the imaginary axis L.

The transmission assembly 10 of the photosensitive drum provided by the present invention is fixed to a photosensitive drum by its outer casing 60, and the photosensitive drum is disposed in a toner cartridge (not shown), and the transmission shaft A snap-in structure 80 of 20 protrudes from one end of the toner cartridge. When the user installs the toner cartridge in a casing (not shown) of an electronic imaging device, the drive shaft 20 is driven by the snap structure 80 and a casing disposed in the casing. The shaft 90 (shown in FIG. 9 to FIG. 19) is engaged, that is, a part of the transmission shaft 90 is received by the accommodating space 86, and the two hook slots are used The 823 is respectively inserted into and engaged with the two protrusions 92 of the drive shaft 90, so that the photosensitive drum can be driven by the drive shaft 90.

9 to 14 show the process of the drive assembly 10 of the photosensitive drum and the drive shaft 90 being engaged with each other, wherein the two snap blocks 82 are labeled as 82A and 82B, respectively, to more clearly illustrate the card. Process. In FIG. 9, the drive shaft 90 is in contact with the inner side 824 of the snap block 82A. At this time, the drive shaft 90 starts to push the drive shaft 20 toward the outer casing 60 (ie, the second direction). The drive shaft 20 is moved inward along the shaft hole 322 of the sleeve 30, and the drive shaft 20 is also rotated by the protrusion 75 of the sleeve 30 through the slot 324, so that the drive shaft One of the protrusions 92 of the 90 slides along the inclined top surface 822 of the snap block 82A (as shown in FIG. 10), and then passes over the top end 821 of the snap block 82A (as shown in FIG. 11). Then, the drive shaft 90 is no longer pushed against the transmission shaft 20, so the transmission shaft 20 is moved by the elastic force of the small diameter section 52 to move outward (ie, the first direction) along the shaft hole 322 of the sleeve 30 while The two hook slots 823 are respectively engaged with the protrusions 92 of the drive shaft 90 (as shown in FIGS. 12 to 14).

In this way, when the drive shaft 90 is rotated counterclockwise as seen from FIG. 13, the two protrusions 92 are respectively pushed against the two latching blocks 82A, 82B to drive the transmission assembly 10 to rotate counterclockwise. At this time, the engagement relationship between the two hook slots 823 and the two protrusions 92 causes the transmission shaft 20 to move inward (ie, the first direction) along the shaft hole 322 of the sleeve 30 while rotating. Therefore, the drive shaft 90 can continuously drive the transmission assembly 10 to rotate synchronously. It is to be noted that, in FIG. 14 , the protrusion 92 of the driving shaft 90 is pushed against the concave portion 823 a of the hooking groove 823 , but each of the protruding posts 92 can also push against the limit of the hooking groove 823 . The surface 823b, both of which can produce the transmission effect as described above, in other words, regardless of whether the boss 92 of the drive shaft 90 is in contact with the recess 823a or the limiting surface 823b, the transmission effect is obtained.

15 to 19 show a process in which the transmission assembly 10 of the photosensitive drum is moved from the position shown in FIGS. 13 and 14 to the left side and is separated from the drive shaft 90, wherein the two-clamp block The 82 series are labeled 82A and 82B, respectively, to more clearly illustrate the detachment process. Initially, the latching block 82B is directly separated from the stud 92, and the latching block 82A is pushed against the stud 92, so that the propeller shaft 20 is rotated counterclockwise (as shown in FIG. 15). At this time, since the drive shaft 90 is stationary, the drive shaft 20 rotates while overcoming the elastic member. The elastic force of the small diameter section 52 of 50 moves inward (ie, the second direction) along the shaft hole 322 of the sleeve 30 (as shown in FIG. 16), so that the snap block 82A and the boss 92 are separated from each other. The drive shaft 20 still abuts the drive shaft 90 with the snap block 82A, and the drive assembly 10 continues to move to the left. The drive shaft 20 overcomes the elastic member 50 together with the sleeve 30. The elastic force of the large diameter section 51, so that the boss 92 of the transmission shaft 90 will be separated from the latching block 82A by the top end 821 of the latching block 82A (as shown in FIGS. 17 and 18), thus The transmission assembly 10 can be separated from the drive shaft 90 (as shown in Fig. 19).

The structure of the transmission assembly 10 of the photosensitive drum provided by the present invention is simpler than that of the conventional one, and the manner of contacting and disengaging the driving shaft 90 of the electronic imaging device is different from that of the conventional one, by the transmission shaft 20 The characteristic that can be moved and rotated along the imaginary axis at the same time, and the specially designed shape of the snap block 82 of the drive shaft 20, the drive shaft 10 can be connected to or exit the electronic imaging device housing from different angles. The drive shaft 90 is firmly connected or smoothly detached.

The foregoing process of connecting and disengaging the transmission assembly 10 to the drive shaft 90 is only one possible aspect. For example, when the transmission assembly 10 is coupled to the drive shaft 90, the drive shaft 90 may be as described above. Firstly, the inner side surface 824 of the latching block 82 is contacted. In fact, the driving shaft 90 is more likely to contact the outer side surface 825 of the latching block 82. Alternatively, the driving shaft 90 may first contact the guiding slope of the guiding block 84. 842. At this time, the guiding slope 842 helps to guide the driving shaft 90 into the accommodating space 86. However, the driving assembly provided by the present invention may not be provided with the guiding block 84, and the engaging block 82 is not provided. The number can also be two or more. In addition, the shape of the hooking slot 823 of each of the latching blocks 82 is not limited to the foregoing embodiment, as long as each of the hooking slots 823 can be engaged with the protruding post 92 of the driving shaft 90, and at the same time A part of the hook slot 823 (for example, the limiting surface 823b in the foregoing embodiment) hooks the boss 92 to prevent the transmission shaft 20 from moving in the second direction when being driven.

In addition, the manner in which the sleeve 30 and the elastic member 50 are disposed on the outer casing 60 is not limited to the foregoing embodiment. For example, the protrusion 34 of the sleeve 30 and the limiting groove 63 of the outer casing 60 are also Alternatively, the outer casing 60 can be detachable from the bottom wall 65, and the combined drive shaft 20 and sleeve 30 and the elastic member 50 can enter the outer casing 60 from the bottom of the outer casing 60. In this case, the outer casing 60 does not need to have the mounting groove 62; or, the following may also be adopted The two embodiments provide.

Referring to Figures 20 to 23, a transmission assembly 12 for a photosensitive drum according to a second preferred embodiment of the present invention includes a sleeve 30' and a casing 60' which are different from the foregoing embodiment.

The body 32' of the sleeve 30' has a bottom end 325, and a plurality of grooves 326 recessed from the bottom end 325. An elastic block 327 is formed between each two adjacent grooves 326, and a part of the elastic region is formed. A block 327 projects outwardly from a projection 36.

The bottom wall 65' of the outer casing 60' is detachably disposed on the tubular body 66', and the outer casing 60' further has a joint protruding from the bottom wall 65' toward the top wall 64'. 67, the joint portion 67 is annular and has a coupling groove 671 formed in the center thereof. Further, the joint portion 67 has a top end 672 and a plurality of grooves 673 extending from the top end 672 toward the bottom wall 65'. An elastic block 674 is formed between each two adjacent grooves 673, and each of the elastic blocks 674 is provided with a through groove 675 extending along the imaginary axis L. In this embodiment, the body 66' of the outer casing 60' has two insertion slots 662 (the number of which is not limited), and the bottom wall 65' of the outer casing 60' has two inserting blocks 652 (the same number as the embedded slot 662) The bottom wall 65' is embedded with the card slots 662, respectively, to avoid rotation relative to the body 66'; however, the bottom wall 65' may also be associated with the body 66. 'Integrally connected, but the design of the tube body 66' of the present embodiment is separated from the bottom wall 65' for ease of assembly; further, the tube body has a snap-in block and the bottom wall has a card insertion slot. Achieve the aforementioned effects.

The sleeve 30' is disposed in the coupling groove 671 by the elasticity of the elastic block 327 and the elasticity of the elastic block 674 of the joint portion 67, and the convex portions 36 extend into the through grooves 675; By moving the projections 36 along the through slots 675, respectively, the sleeve 30' is movable relative to the outer casing 60' along the imaginary axis L and is not relatively rotatable.

Referring to Figures 24 through 26, a drive assembly 14 for a photosensitive drum according to a third preferred embodiment of the present invention includes a sleeve 30" and a housing 60" different from the previous embodiment.

The body 32" of the sleeve 30" has a large diameter section 328 and a small diameter section 329 connected to each other, and the large diameter section 328 has two limiting grooves 328a (not limited) extending through the inner and outer surfaces thereof. The through hole 324 is located in the small diameter section 329; the top wall 64" of the outer casing 60" is provided with a plurality of grooves 642 communicating with the receiving hole 61, and an elastic block is formed between each two adjacent grooves 642. Each of the elastic blocks 644 has a first-order portion 646, and the receiving hole 61 further has two limiting blocks 68 protruding from the wall of the hole (the same number as the limiting groove 328a); the sleeve The 30" large diameter section 328 is used by The elastic blocks 644 are elastically passed through the accommodating holes 61 and are limited to the accommodating holes 61, and the limiting blocks 68 are respectively located in the limiting grooves 328a. The sleeve 30" can be moved relative to the outer casing 60" along the imaginary axis L without relative rotation, and the structural design is relatively simple. The step 646 can also be the bottom edge of the elastic block 644 without a stepped shape.

Referring to FIG. 27, a driving assembly 16 for a photosensitive drum according to a fourth preferred embodiment of the present invention is different from the first preferred embodiment described above in that the transmission assembly 16 of the photosensitive drum comprises a larger outer diameter. a first elastic member 51', and a second elastic member 52' having a small outer diameter and disposed in the first elastic member 51'. The first elastic member 51' is disposed in the receiving hole of the outer casing 60. The second elastic member 52 ′ is respectively disposed on the bottom hole 65 of the outer casing 60 and the sleeve 30 , and the second elastic member 52 ′ is disposed on the shaft hole 322 of the sleeve 30 and the receiving hole 61 of the outer casing 60 . And the two ends thereof respectively abut the second end 72 of the shaft 70 of the transmission shaft 20 and the bottom wall 65 of the outer casing 60, so that the effect of the first preferred embodiment can be achieved, and the elasticity can be reduced. Processing costs of the pieces.

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‧‧‧Dynamic drum drive assembly

20‧‧‧ drive shaft

30‧‧‧ sleeve

32‧‧‧Ontology

322‧‧‧Axis hole

324‧‧‧through slot

34‧‧‧Bump

40‧‧‧ latch

50‧‧‧Flexible parts

51‧‧‧ Large diameter section

52‧‧‧Small path

60‧‧‧ Shell

61‧‧‧ accommodating holes

62‧‧‧Installation slot

64‧‧‧ top wall

66‧‧‧管管

70‧‧‧ shaft

71‧‧‧ first end

72‧‧‧ second end

73‧‧‧ jack

74‧‧‧ rod body

80‧‧‧Card structure

81‧‧‧ base

82‧‧‧ card block

823‧‧‧Check card slot

84‧‧‧guide block

86‧‧‧ accommodating space

L‧‧‧ imaginary axis

D1‧‧‧ first direction

D2‧‧‧ second direction

Claims (22)

A transmission assembly (10) for a photosensitive drum for engaging with a drive shaft (90) of an electronic imaging device, the drive shaft (90) having two protrusions (92), the transmission assembly (10) comprising: The drive shaft (20) includes a shaft (70) and a snap-fit structure (80) extending along an imaginary axis (L) and having a first direction (D1) toward the first direction (D1) a second end (72) of the second direction (D2) opposite to the first direction (D1), and at least one protrusion (75) radially extending from the shaft (70) The snap-fit structure (80) has a base portion (81) connected to the first end (71) of the shaft (70), and two from opposite sides of the base portion (81) away from the imaginary axis (L) And a receiving block (82) extending in the first direction (D1), and an accommodating space (86) between the two engaging blocks (82) for accommodating the driving shaft (90), each The card block (82) has a first side (D1) gradually approaching the outer side (825) of the imaginary axis (L), an inner side (824) facing the accommodating space (86), and a An inclined top surface (822) at the intersection of the outer side surface (825) and the inner side surface (824), one on the outer side surface (825) and the a hook slot (823) at the intersection of the side (824), and a top end (821) between the inclined top surface (822) and the hook slot (823), wherein the inclined top surface (822) and the The angle of the imaginary axis (L) is not equal to 90 degrees, and the opening of the hooking groove (823) of the two card block (82) is substantially opposite to the opposite direction for the protruding column of the driving shaft (90) (92) extending into the hook slot (823) through the opening; a sleeve (30) having a body (32), a shaft hole (322) extending through the body (32) along the imaginary axis (L) ), and at least one is located on the body (32) And a slot (324) communicating with the shaft hole (322), the shaft (70) of the transmission shaft (20) is rotatably and axially movably disposed in the shaft hole (322), the slot ( 324) is inclined with respect to the imaginary axis (L), and the inclined top surface (822) of the through groove (324) and the snap block (82) of the transmission shaft (20) are oriented in the same rotation direction One direction (D1) extends obliquely, and the protrusion (75) of the shaft (70) movably extends into the through groove (324); a casing (60) having a body (66) and a top The wall (64) is located on one side of the tubular body (66), a bottom wall (65) is located on the other side of the tubular body (66), and a receiving hole (61) extending along the imaginary axis (L) The tube body (66) is disposed at one end of the photosensitive drum, and the receiving hole (61) is open to the top wall (64) and extends into the sleeve (30) body (32). The sleeve (30) is non-rotatable but is movably coupled to the outer casing (60) along the imaginary axis (L); and an elastic member (50) having a large diameter section (51) interconnected And a small diameter section (52), the large diameter section (51) is disposed on the receiving hole (61) of the outer casing (60) and abuts against the bottom wall of the outer casing (60) at both ends thereof (65) ) And the sleeve (30), the small diameter section (52) is disposed on the shaft hole (322) of the sleeve (30) and abuts against the shaft (70) of the transmission shaft (20) Second end (72). The transmission assembly (10) of the photosensitive drum of claim 1, wherein the fastening structure (80) of the transmission shaft (20) further has two extensions from opposite sides of the base (81), respectively. And a guiding block (84), each guiding block (84) has a guiding inclined surface (842), and each guiding inclined surface (842) gradually approaches the imaginary axis (L) toward the first direction (D1) . The transmission assembly (10) of the photosensitive drum of claim 1, wherein the sleeve (30) further has two protrusions (34) protruding outward from the body (32), the housing (60) further having two limiting slots (63) extending parallel to the imaginary axis (L), the two limiting slots (63) being in communication with the receiving hole (61) and not open to the top wall (64) For the two protrusions (34) of the sleeve (30) to extend. The transmission assembly (10) of the photosensitive drum of claim 3, wherein the housing (60) further has a mounting groove (62), and the mounting groove (62) and the two limiting slots (63) are mutually Connected, and the mounting groove (62) is open to the top wall (64) of the outer casing (60). The transmission assembly (12) of the photosensitive drum of claim 1, wherein the sleeve (30') has a plurality of convex portions (36) protruding outward from the body (32'), The outer casing (60') further has a joint portion (67) protruding from the bottom wall (65') toward the top wall (64'), the joint portion (67) being annular and at the center thereof Forming a coupling groove (671), and the joint portion (67) has a plurality of through grooves (675) extending along the imaginary axis (L), the sleeve (30') is disposed on the coupling groove (671), and The convex portion (36) of the sleeve (30') movably extends into the through groove (675) of the joint portion (67). The transmission assembly (12) of the photosensitive drum of claim 5, wherein the body (32') of the sleeve (30') has a bottom end (325) and a plurality of bottom ends (325) a recessed groove (326), an elastic block (327) is formed between each two adjacent grooves (326), and the convex portion (36) of the sleeve (30') is located in the elastic blocks ( 327). The transmission assembly (12) of the photosensitive drum of claim 5, wherein the joint (67) of the outer casing (60') has a top end (672) and a plurality of the top end (672) toward the bottom A groove (673) extending in the direction of the wall (65') forms an elastic block (674) between each two adjacent grooves (673), and the groove (675) of the joint portion (67) is located The elastic blocks (674). The transmission assembly (12) of the photosensitive drum of claim 5, wherein the body (66') of the outer casing (60') has a card insertion groove (662), the bottom of the outer casing (60'). The wall (65') has a snap-in block (652) that is detachably disposed on the body (66') and that is coupled to the card slot (652) and the card slot (662). ) embedded. The transmission assembly (14) of the photosensitive drum of claim 1, wherein the body (32") of the sleeve (30") has a large diameter section (328) and a small diameter section ( 329), the large diameter section (328) has a limiting groove (328a), the through groove (324) is located in the small diameter section (329); the top wall (64") of the outer casing (60") is provided a plurality of grooves (642) communicating with the receiving hole (61), an elastic block (644) is formed between each two adjacent grooves (642), and each of the elastic blocks (644) has a first order a portion (646), the receiving hole (61) further has a limiting block (68); the large diameter section (328) of the sleeve (30") is limited by the step (646) The hole (61) is placed in the hole (68), and the limit block (68) is located in the limit groove (328a). The transmission assembly (10) of the photosensitive drum according to Item 1, wherein the hooking groove (823) has a recess (823a) in each of the engaging blocks (82) of the transmission shaft (20). And one located in the recess (823a) with the top end (821) A limiting surface (823b) between the limiting surface (823b) extends substantially obliquely from the top end (821) toward the inclined top surface (822). The transmission assembly (10) of the photosensitive drum of claim 1, wherein the shaft (70) of the transmission shaft (20) has a socket (73) for inserting a pin (40), the pin ( 40) A portion protruding from the socket (73) forms the bump (75). A driving assembly (16) for a photosensitive drum for engaging with a driving shaft (90) of an electronic imaging device, the driving shaft (90) having a two convex (92) column, the transmission assembly (16) comprising: a The drive shaft (20) includes a shaft (70) and a snap-fit structure (80) extending along an imaginary axis (L) and having a first direction (D1) toward the first direction (D1) a second end (72) of the second direction (D2) opposite to the first direction (D1), and at least one protrusion (75) radially extending from the shaft (70) The snap-fit structure (80) has a base portion (81) connected to the first end (71) of the shaft (70), and two from opposite sides of the base portion (81) away from the imaginary axis (L) And a receiving block (82) extending in the first direction (D1), and an accommodating space (86) between the two engaging blocks (82) for accommodating the driving shaft (90), each The card block (82) has a first side (D1) gradually approaching the outer side (825) of the imaginary axis (L), an inner side (824) facing the accommodating space (86), and a An inclined top surface (822) at the intersection of the outer side surface (825) and the inner side surface (824), one on the outer side surface (825) and the a hook slot (823) at the intersection of the side (824), and a top end (821) between the inclined top surface (822) and the hook slot (823), wherein the inclined top surface (822) and the Imaginary axis (L) The angle of the hooking slot (823) of the two latching block (82) is substantially opposite to the opposite direction for the protruding post (92) of the driving shaft (90) to pass through. The opening extends into the hook slot (823); a sleeve (30) having a body (32), a shaft hole (322) extending through the body (32) along the imaginary axis (L), and at least one a slot (324) disposed in the body (32) and communicating with the shaft hole (322), the shaft (70) of the transmission shaft (20) being rotatably and axially movable in the shaft hole (322) The through slot (324) is inclined relative to the imaginary axis (L), and the slanted top surface (822) of the through slot (324) and the snap block (82) of the drive shaft (20) Extending obliquely in the first direction (D1) along the same direction of rotation, the protrusion (75) of the shaft (70) movably extends into the through groove (324); a casing (60) having a tube The body (66), a top wall (64) is located on one side of the body (66), a bottom wall (65) is located on the other side of the body (66), and extends along the imaginary axis (L) The receiving body (66) is configured to be disposed at one end of the photosensitive drum, the receiving hole (61) is open to the top wall (64) and is provided for the sleeve (30) the body (32) extends so that the sleeve (30) cannot rotate but can be movably coupled to the outer casing (60) along the imaginary axis (L); and a first elastic member (51) ') is disposed in the receiving hole (61) of the outer casing (60) and abuts against the bottom wall (65) and the sleeve (30) of the outer casing (60) at both ends thereof; and a second The elastic member (52') is disposed on the shaft hole (322) of the sleeve (30) and the receiving hole (61) of the outer casing (60), and is respectively abutted at the two ends thereof The second end (72) of the shaft (70) of the drive shaft (20) and the bottom wall (65) of the outer casing (60). The transmission assembly of the photosensitive drum of claim 12, wherein the fastening structure of the transmission shaft further has two guiding blocks respectively extending from opposite sides of the base, each guiding block having A guiding slope, each of the guiding slopes gradually approaching the imaginary axis toward the first direction. The transmission assembly of the photosensitive drum of claim 12, wherein the sleeve further has two protrusions protruding outward from the body, the housing further having two limiting slots extending parallel to the imaginary axis. The two limiting slots are in communication with the receiving hole and are not open to the top wall for the two protrusions of the sleeve to extend. The transmission assembly of the photosensitive drum of claim 14, wherein the housing further has a mounting groove, the mounting groove and the two limiting slots communicate with each other, and the mounting slot is open to the top wall of the housing. The transmission assembly of the photosensitive drum of claim 12, wherein the sleeve has a plurality of protrusions projecting outwardly from the body, the housing further having a direction from the bottom wall toward the top wall a joint portion protruding from the joint portion, wherein the joint portion has a ring shape and a joint groove is formed at a center thereof, and the joint portion has a plurality of through grooves extending along the imaginary axis, and the sleeve is disposed on the joint groove, and the sleeve is disposed on the joint groove The projection of the sleeve movably extends into the slot of the joint. The transmission assembly of the photosensitive drum of claim 16, wherein the body of the sleeve has a bottom end, and a plurality of grooves recessed from the bottom end, forming an elasticity between each two adjacent grooves The block, the convex portion of the sleeve is located in the elastic blocks. The transmission assembly of the photosensitive drum of claim 16, wherein the joint portion of the outer casing has a top end, and a plurality of grooves extending from the top end toward the bottom wall, each of the two adjacent grooves An elastic block is formed, and the through groove of the joint is located in the elastic blocks. The transmission assembly of the photosensitive drum of claim 16, wherein the tubular body of the outer casing has a card insertion slot, and the bottom wall of the outer casing has an inserting block, and the bottom wall is detachably disposed on the tube The embedded card block is embedded in the card slot. The transmission assembly of the photosensitive drum of claim 12, wherein the body of the sleeve has a large diameter section and a small diameter section connected to each other, the large diameter section has a limiting groove, and the grooved system The top wall of the outer casing is provided with a plurality of grooves communicating with the receiving holes, and an elastic block is formed between each two adjacent grooves, and each of the elastic blocks has a first-order portion. The receiving hole further has a limiting block; the large diameter section of the sleeve is located in the receiving hole by the step, and the limiting block is located in the limiting groove. The transmission assembly of the photosensitive drum of claim 12, wherein each of the engaging blocks of the transmission shaft has a recessed portion and a limiting surface between the recessed portion and the top end The limiting surface extends substantially obliquely from the top end toward the inclined top surface. The transmission assembly of the photosensitive drum of claim 12, wherein the shaft of the transmission shaft has a socket for insertion of a pin, and the portion of the pin protruding from the socket forms the projection.