TWM469189U - Automatic document feeder - Google Patents

Description

Automatic feeding device

The present invention relates to an automatic feeding device, and more particularly to an automatic feeding device that generates a downforce using a torsion spring.

Press, printer, photocopier, scanner, fax machine or MFP with the above functions, all have an automatic feeding device (ADF) to feed paper to the inside of the machine. The process of feeding paper may be related to The reliability of the automatic feeding device is critical if the machine jams.

Referring to the first figure, a conventional feeding device 100' includes a paper take-up module base 10', a first pick-up roller 11', a second pick-up roller 12', a take-up belt 13', and a The one-way ring gear 20', a paper feed gear 21', a first paper feed shaft 22', a second paper feed shaft 23', a paper feed torsion spring 24', and a return torsion spring 25'.

The paper take-up module base 10' has two opposite side walls, and has a fixed end 101' and a free end 102'. The fixed end 101' accommodates the first pick-up roller 11', and the free end 102' accommodates the second pick-up roller 12. 'The first paper take-up roller 11' and the second paper take-up roller 12' have a first tooth portion 110' and a second tooth portion 120', respectively, and the paper take-up belt 13' sleeves the first tooth portion 110' and The second tooth portion 120 ′ transmits power, and the first paper take-up roller 11 ′ is opposite to the first tooth portion 1 The 10 end is provided with a ratchet wheel 111', and the one-way ring gear 20' is engaged with the ratchet wheel 111', and includes a limiting groove 200', and the direction of engagement of the one-way ring gear 20' with the ratchet wheel 111' is counterclockwise, when one-way When the ring gear 20' is rotated clockwise, the one-way ring gear 20' and the ratchet wheel 111' are idly rotated with each other by the special angle design of the rod teeth, and the second paper feed shaft 23' is connected to the two side walls by the fixed end 101'. And the one-way ring gear 20' and the first paper take-up roller 11' are connected in series in the two side walls, and the second paper feed shaft 23' is provided with a transmission platform 230' between the one-way ring gear 20' and the side wall, and the transmission table 230 'including a bump 231' for engaging the limiting slot 200', rotating the driving plate 230' counterclockwise by the second paper feeding shaft 23', so that the bump 231' is pressed against the limiting slot 200', thereby The one-way ring gear 20' drives the first paper take-up roller 11' to rotate counterclockwise, and the first tooth portion 110' drives the second tooth portion 120' to rotate through the paper take-up belt 13', and vice versa, when the drive shaft 200' is clockwise When rotating, the one-way ring gear 20' and the ratchet wheel 111' are idly loosened from each other.

One side of the paper feed gear 21' is fixedly coupled to the paper feed torsion spring 24', and the other end of the paper feed torsion spring 24' is sleeved on the first paper feed shaft 22'. When the paper feed gear 21' rotates counterclockwise, The paper feed torsion spring 24' will screw the first paper feed shaft 22' to rotate it. When the paper feed gear 21' rotates clockwise, the paper feed torsion spring 24' is loosened, and the paper feed torsion spring 24' is unscrewed. The first paper feed shafts 22' are idling with each other, and the first paper feed shaft 22' stops rotating. One end of the return torsion spring 25' is sleeved on the second paper feed shaft 23', and the other end is fixed to the paper take-up module base 10'; the first paper feed shaft 22' is linked in series with the second paper feed shaft 23'.

When actuated, the paper feed gear 21' rotates counterclockwise to drive the paper feed torsion spring 24' to tighten the first paper feed shaft 22', thereby driving the second paper feed shaft 23' counterclockwise. Rotating, the returning torsion spring 25' is screwed to the second paper feed shaft 23' to generate a counterclockwise torque, thereby driving the paper take-up paper holder, so that the free end 102' of the paper take-up module holder 10' is along the fixed end 101 'Rotate downward until the paper take-up plane is pressed. At this time, due to the excessive resistance of the paper take-up plane, the torsion spring 25' reciprocally idly rotates (more than the maximum static friction) to the second paper feed shaft 23'. The paper module holder 10' maintains a fixed torsion against the paper take-up plane, and picks up the paper by the rotating first take-up roller 11' and the second take-up roller 12'.

Next, when the paper feed gear 21' rotates clockwise, the paper feed torsion spring 24' is rotated clockwise, and the first paper feed shaft 22' stops interlocking. At this time, since the paper take-up action has caused the return torsion spring 25 'Storing a clockwise returning torque, so the torque is transmitted to the second paper feed shaft 23', whereby the torque of the return torsion spring 25' drives the paper take-up module holder 10' to rotate clockwise, at this time the free end The 102' can be lifted along the fixed end 101' to complete the paper take-up cycle.

However, the power transmission of the conventional feeding device 100' is very dependent on the friction between the paper feed torsion spring 24' and the first paper feed shaft 22' and the friction between the return torsion spring 25' and the second paper feed shaft 23'. The force, and the torsion spring will be reduced after the reciprocating use for a certain number of times, which will cause the attenuation or even failure of the use efficiency, such as insufficient down-pressure of the device, or the inability to return to the original position.

In order to avoid the attenuation or even failure of the performance, it is necessary to propose an automatic feeding device that overcomes the friction problem between the above-mentioned torsion spring and the rotating shaft.

The purpose of the present invention is to provide an automatic feeding device, which includes a paper take-up module, a first follower gear, and a second follower tooth. a wheel engaging the first follower gear; a sliding gear engaging the second follower gear and displaceable between a first position and a second position; a hook disposed adjacent to the sliding gear, provided with a a rotating body, the first end of the body is provided with a first barb, the other end is provided with a shifting rod and a stop block spaced apart from each other, and the shifting rod can be meshed with the sliding gear; a baffle is disposed adjacent to the hook, a stop arm extending in the direction of the stop block and a swing arm extending in the opposite direction; a second barb that is engaged with the first barb; and a top block disposed above the baffle and abutting the baffle a swinging arm; an elastic component disposed above the paper take-up module and pressing the paper take-up module; wherein, when the paper take-up module picks up the paper, the sliding gear shifts the rod in the first position to rotate the hook The first barb is separated from the second barb, whereby the swing arm is separated from the top block, and the stop arm abuts the stop block, the elastic member presses the paper take-up module downward, and the sliding gear is separated from the transfer rod; When the paper take-up module stops picking up the paper, the sliding gear is displaced to the second position and the rod is transferred. When the stop arm abuts the stop block, the hook forms a fulcrum of the sliding gear, thereby moving the paper take-up module upward, so that the top block presses the swing arm to separate the stop arm from the stop block, and the sliding gear is toggled. The rod is transferred so that the first barb is engaged with the second barb.

The automatic feeding device of the present invention replaces the function of the paper feed torsion spring and the return torsion spring in the prior art by the swing module, and the module does not reduce the performance due to the increased number of uses, and can greatly improve the service life of the device.

1‧‧‧Automatic feeding device

10‧‧‧Power Module

11‧‧‧Transmission gear

110‧‧‧Feeding direction

111‧‧‧Resumption direction

12‧‧‧ driven gear

13‧‧‧First transmission rod

20‧‧‧Picking module

21‧‧‧Standing frame

22‧‧‧ top wall

220‧‧‧Resistance surface

23‧‧‧ side wall

230‧‧‧ fixed end

231‧‧‧Free end

24‧‧‧Dividing roller

240‧‧‧First tooth

241‧‧‧second ratchet

242‧‧‧Second ratchet

2420‧‧‧second abutment

2421‧‧‧Second inclined surface

25‧‧‧Second transmission rod

250‧‧‧First follower gear

2501‧‧‧ oblique slider

251‧‧‧First ratchet

2510‧‧‧ oblique chute

252‧‧‧First ratchet

2520‧‧‧First abutment

2521‧‧‧First inclined surface

26‧‧‧Paper roller

260‧‧‧second tooth

27‧‧‧Land

28‧‧‧ buckle groove

30‧‧‧Swing module

31‧‧‧ side panels

310‧‧‧sliding trough

311‧‧‧ first position

312‧‧‧ second position

313‧‧‧Shrap

32‧‧‧Second follower gear

33‧‧‧Sliding gear

34‧‧‧ hook

340‧‧‧ Ontology

341‧‧‧ functional end

342‧‧‧ regulation end

343‧‧‧ bumps

344‧‧‧First Barb

345‧‧‧Dashing rodents

346‧‧‧stop block

35‧‧ ‧ baffle

350‧‧ ‧ arm

351‧‧‧ swing arm

36‧‧‧Upper cover

360‧‧‧ card slot

361‧‧‧second barb

362‧‧‧Top block

37‧‧‧Flexible components

370‧‧‧Double torsion spring

371‧‧‧ force arm

372‧‧‧Resistance arm

373‧‧‧Connecting arm

The first figure is a perspective view of a conventional feeding device.

The second figure is an exploded perspective view of the automatic feeding device of the present creation.

The third figure is an exploded perspective view of the paper take-up module of the automatic feeding device shown in the second figure.

The fourth figure is an enlarged view of the third icon Note IV.

The fifth figure is a right side view of the swing module of the automatic feeding device shown in the second figure.

Figure 6 is a perspective view of the barb of the automatic feeding device shown in the second figure.

Figure 7 is a left side cross-sectional view of the automatic feeding device shown in Fig. 2, where A is the state when the paper take-up mechanism is about to be depressed, and B is the state when the paper take-up mechanism is about to be lifted.

To clarify the technical content, structural features, objectives, and effects of the present invention, the embodiments are described in detail below with reference to the drawings.

Please refer to the second figure. The automatic feeding device 1 includes a power module 10, a paper take-up module 20 and a swing module 30. The power module 10 can transmit rotational kinetic energy to the paper take-up module 20 The swing module 30 is engaged with the paper take-up module 20 to obtain the rotational kinetic energy transmitted by the power module 10 .

The power module 10 further includes a transmission gear 11, a driven gear 12 and a first transmission rod 13. The driven gear 12 meshes with the transmission gear 11, and the first transmission rod 13 is coaxially connected with the driven gear 12, and the transmission gear 11 The rotation direction is the paper feed direction 110, and the first direction is the start direction 111. The paper feed direction 110 controls the paper take-up module 20 to press down and roll the paper. The start direction 111 controls the paper take-up module 20 to lift and reset.

Referring to the third figure, the paper take-up module 20 includes a holding frame 21, a separation roller 24, a second transmission rod 25, a pickup roller 26 and a belt 27. The holder 21 has a top wall 22 and a side wall 23. The side wall 23 is connected to one side of the top wall 22. The side wall 23 has a fixed end 230 and a free end 231. The free end 231 is pivoted about the fixed end 230. A buckle groove 28 is disposed on the upper surface of the top wall 22. The separation roller 24 is disposed at the fixed end 230 of the holder 21. The pickup roller 26 is disposed at the free end 231 of the holder 21. The separation roller 24 is provided on one side There is a first tooth portion 240. The first tooth portion 240 has a ring of teeth. A side of the pickup roller 26 is provided with a second tooth portion 260 corresponding to the first tooth portion 240. The belt 27 connects the first tooth portion 240 and the second tooth portion 260.

The second transmission rod 25 passes through the axial center of the separation roller 24 and the side wall 23 of the holder 21 and is disposed on the fixed end 230 of the holder 21, and the second transmission rod 25 is coupled with the first transmission rod 13, and the second transmission rod 25 A first follower gear 250 is disposed on the side of the first follower gear 250. The first ratchet wheel 251 has a plurality of first ratchet teeth 252, and the paper separation roller 24 corresponds to the first follower gear 250. A second ratchet 241 is disposed on the side, the second ratchet 241 has a plurality of second ratchet teeth 242, and the second ratchet teeth 242 are intermeshable with the first ratchet teeth 252. The first ratchet wheel 251 is driven by the second transmission rod 25 to engage the second ratchet wheel 241, thereby driving the separation roller 24 to rotate, and the first tooth portion 240 of the separation roller 24 drives the belt 27 to be pulled. The paper roller 26 rotates.

Referring to the fourth figure, when the transmission gear 11 is rotated toward the re-starting direction 111, the rolling of the pickup roller 26 and the separation roller 24 is meaningless. To reduce the burden of power transmission, the first ratchet 251 and the second ratchet 241 are preferably One-way ratchet. Therefore, the first ratchet 251 can be sleeved on the second transmission rod 25 along the axial direction of the second transmission rod 25. Thereby, when the transmission gear 11 rotates in the re-starting direction 111 and drives the first ratchet 251, the first ratchet 251 is slidably separated from the second ratchet 241, that is, the engagement position of the second ratchet 241 is withdrawn.

Specifically, the first ratchet 251 is provided with a slanting groove 2510. The inclined groove 2510 is provided with a sliding space along the radial direction of the first ratchet 251, and an inclined surface is disposed on one side of the sliding space. The first follower gear 250 is disposed to extend obliquely into the chute 2510 Slider 2501. Thereby, when the transmission gear 11 rotates in the paper feeding direction 110 and drives the first follower gear 250, the inclined slider 2501 slides toward one end of the inclined sliding groove 2510 and abuts against the inclined surface of the inclined sliding groove 2510, so that the first ratchet 251 The second ratchet 241 is slid along the axial direction of the second transmission rod 25, that is, the engaged position. On the other hand, when rotating in the re-starting direction 111, the inclined slider 2501 slides on the other end of the inclined chute 2510 and abuts against the inclined surface of the inclined chute 2510, so that the first ratchet 251 slides along the axial direction of the second transmission rod 25 and Separate from the second ratchet 241, i.e., exit the engaged position.

The first ratchet 252 is provided with a first abutting surface 2520 and a first inclined surface 2521. The first abutting surface 2520 is substantially parallel to the axial direction of the first ratchet 251, and the first abutting surface 2520 is An acute angle is formed between the first inclined faces 2521. The second ratchet 242 is provided with a second abutting surface 2420 and a second inclined surface 2421. The second abutting surface 2420 is substantially parallel to the axial direction of the second ratchet 241, and the second abutting surface 2420 and the second inclined surface An acute angle is formed between the faces 2421.

Referring to the second, fifth, and seventh figures, the swing module 30 includes a side plate 31, a second follower gear 32, a sliding gear 33, a hook 34, a baffle 35, and an upper cover. 36 and an elastic member 37. The side plate 31 is connected to the side wall 22 of the holder 21, and the side plate 31 is respectively formed with a sliding groove 310. The top end of the sliding groove 310 is defined as a first position 311, and the bottom end is defined as a second position 312. The second follower gear 32 is disposed between the side plate 31 and the top wall 22 and meshes with the first follower gear 250 of the paper take-up module 20 . The sliding gear 33 meshes with the second follower gear 32, and the axis of the sliding gear 33 extends into the sliding groove 310, whereby the sliding gear 33 can be in the sliding groove 310 A position 311 and a second position 312 slide back and forth.

The hook 34 is disposed adjacent to the sliding gear 33, and has a rotating body 340. The other end of the body 341 is a functional end 341 along the axial direction, and the outer surface of the body 340 extends axially with a protrusion 343. The outer surface of the 340 is provided with an L-shaped first barb 344 at the functional end 341, and the top wall 22 extends along the hook 34 to form an abutting surface 220 for resisting the first barb 344 to limit The rotation angle of the hook 34 is provided on the outer surface of the body 340 at the regulating end 342 by a shifting rod 345 and a stopping block 346. The shifting rod 345 is disposed at a distance from the stopping block 346, and the shifting rod 345 can be meshed with the sliding gear 33. . In the present embodiment, the L-shaped first barb 344 is disposed between the shifting rod 345 and the stop block 346.

The baffle 35 is disposed adjacent to the hook 34, and has a baffle arm 350 extending in the direction of the stop block 346 and a swing arm 351 extending in the opposite direction. The baffle arm 350 is heavier than the swing arm 351. The upper cover 36 is disposed above the paper take-up module 20 and the power module 10, and fixes the first transmission rod 13, the second transmission rod 25 and the side plate 31 on the same axial line and provides a rotation fulcrum, and the upper cover 36 is in the paper take-up module. A pair of vertically extending slots 360 are disposed on two sides of the cover 20, and an L-shaped second barb 361 is disposed adjacent to the hooks 34 for engaging the first barbs 344, and the upper cover 36 is disposed above the swing arm 351 A top block 362, the side plate 31 is disposed below the hook 34 with a horizontally extending elastic piece 313. The elastic piece 313 is spaced apart from the body 340 of the hook 34. When the hook 34 rotates, the protrusion 343 can press the elastic piece 313. Thereby, a counteracting force is generated, so that the hook 34 is not displaced by the shaking, and the latching rod 345 is prevented from being displaced by the sway during the action, and the sliding gear 33 is stuck. The elastic member 37 is disposed on the upper cover and the paper take-up module 20 Therefore, a force for continuously pressing the paper take-up module 20 is generated. Specifically, the elastic member 37 is preferably a double torsion spring 370 disposed on the side plate 31 and the side wall 23, and has a pair of force applying arms 371 and a The anti-force arm 372 is connected to the anti-arm 372 through a connecting arm 373. The urging arm 371 abuts against the slot 360, and the connecting arm 373 abuts against the grooving slot 28, and the slot 360 serves as a fulcrum and The free end 231 is pressed down, thereby driving the paper take-up module 20 to rotate downward.

The automatic feeding device 1 of the present invention provides a rotational force to the transmission gear 11 by a rotating motor (not shown), so that the automatic feeding device 1 performs the actions of pressing down, starting rolling, stopping rolling, and lifting, the operation process is as follows Please refer to the seventh figure for reference to the second figure: initial state (seventh figure A): the first barb 344 is fastened and fixed with the second barb 361, and the paper take-up module 20 is pinned to resist the rotation of the elastic member 37. The top block 362 presses the swing arm 351 to lift the stop arm 350.

Starting to take the paper: the transmission gear 11 rotates in the paper feeding direction 110 and interlocks the first transmission rod 13 and the second transmission rod 25, and the second transmission rod 25 links the first follower gear 250 to drive the inclined slider 2501, the first follow-up The gear 250 simultaneously engages the second follower gear 32. Then, the inclined slider 2501 pushes against the first ratchet 251, thereby engaging the first ratchet 251 with the second ratchet 241, and the second ratchet 241 drives the separation roller 24 and the pickup roller. 26, the action of rolling paper take-up is realized, at the same time, the second follower gear 32 meshes with the sliding gear 33, so that the sliding gear 33 is located at the first position 311, and the sliding gear 33 can pluck the shifting rod 345 to rotate the hook 34, thereby making the A barb 344 is separated from the second barb 361 until the first barb 344 abuts against the abutment surface 220, during which the projection 343 presses against the elastic piece 313. After the first hook 34 is separated from the second barb 361, the elastic element The member 37 can drive the paper take-up module 20 to press down to realize the action of pressing down, and after the swing arm 351 is separated from the top block 362, the heavier arm 350 moves downward to abut the stop block 346, in this state. The transfer rod 345 is separated from the slide gear 33 and idling.

Stop picking up (seventh figure B): the transmission gear 11 rotates in the re-starting direction 111 and interlocks the first transmission rod 13 and the second transmission rod 25, and the second transmission rod 25 interlocks the first follow-up gear 250 to drive the oblique slider 2501, and the first follower gear 250 is engaged with the second follower gear 32. Then, the inclined slider 2501 is pushed against the first ratchet 251 to release the first ratchet 251 from the engaged position, thereby causing the second ratchet 241 to idle. The roller stops rolling while the second follower gear 32 engages the sliding gear 33 such that the sliding gear 33 is in the second position 312 to engage the shifting rod 345. At this time, the sliding arm 33 is biased by the blocking arm 350 against the stop 346. The restriction is not able to rotate and slide, so that the hook 34, the sliding gear 33, the second follower gear 32, and the second transmission rod 25 cannot be rotated, thereby forming a fulcrum of the power module 10, thereby taking the paper take-up module 20 is lifted up until the top block 362 presses the swing arm 351 to separate the arm 350 from the stop block 346. At this time, the components can start to rotate, and the sliding gear 33 can move the shifting rod 345. 343 again presses the elastic piece 313, and the hook 34 rotates to the first The hook 344 engaging with the fixed second barb 361, and the sliding gear 33 engages gear 345 that is allocated again separated, and reply operation to achieve elevation of the initial state. When the transmission gear 11 rotates again in the paper feed direction 110, the second follower gear 32 drives the slide gear 33 to move to the first position 311, causing the slide gear 33 to mesh with the transfer rod 345 again.

In summary, an automatic feeding device 1 of the present invention is replaced by a swing module 30. The function of the paper feed torsion spring 24' and the return torsion spring 25' in the prior art is to solve the problem of friction, and the module does not reduce the performance due to the increased number of uses, and can greatly increase the service life of the device.

The above description is only a preferred and feasible embodiment of the present invention, and thus does not limit the scope of the patent of the present invention. Therefore, the equivalent structural changes that are made by using the present specification and the illustrated contents are all included in the present creation. Within the scope, it is combined with Chen Ming.

12‧‧‧ driven gear

20‧‧‧Picking module

231‧‧‧Free end

24‧‧‧Dividing roller

250‧‧‧First follower gear

26‧‧‧Paper roller

27‧‧‧Land

28‧‧‧ buckle groove

30‧‧‧Swing module

311‧‧‧ first position

312‧‧‧ second position

32‧‧‧Second follower gear

33‧‧‧Sliding gear

34‧‧‧ hook

344‧‧‧First Barb

345‧‧‧Dashing rodents

346‧‧‧stop block

35‧‧ ‧ baffle

350‧‧ ‧ arm

351‧‧‧ swing arm

36‧‧‧Upper cover

360‧‧‧ card slot

361‧‧‧second barb

362‧‧‧Top block

37‧‧‧Flexible components

371‧‧‧ force arm

372‧‧‧Resistance arm

373‧‧‧Connecting arm

Claims (7)

An automatic feeding device comprising: a paper take-up module, a first follower gear; a second follower gear to engage the first follower gear; a sliding gear to engage the second follower gear, and a first position and a second position are displaced; a hook is disposed adjacent to the sliding gear, and is provided with a rotating body, the first end of the body is provided with a first barb, and the other end is provided with a mutually spaced one. a rod and a stop block, the shifting rod can be meshed with the sliding gear; a baffle is disposed adjacent to the hook, and has a blocking arm extending in the direction of the stopping block and a swing arm extending in the opposite direction; The second barb is fastened to the first barb; a top block is disposed above the baffle and abuts the swing arm of the top baffle; an elastic component is disposed above the paper take-up module and presses the paper take-up module; When the paper take-up module picks up the paper, the sliding gear shifts the rod in the first position to rotate the hook and separate the first barb from the second barb, thereby separating the swing arm from the top block and The retaining arm abuts the stop block, and the elastic member presses the paper take-up module to press down, and the sliding gear and the sliding gear When the paper take-up module stops picking up the paper, the sliding gear is displaced to the second position to engage with the shifting rod, and the hook is abutted against the stop block to form a fulcrum of the sliding gear, thereby making the paper take-up module Move, so that the top block presses the swing arm to separate the stop arm from the stop block. At this time, the sliding gear toggles the rod to make the first barb and the second barb buckle. The automatic feeding device of claim 1, wherein the upper end of the paper take-up module is provided with an upper cover; the elastic element comprises at least one torsion spring pivotally connected to the middle portion of the paper take-up module, and one end of the torsion spring is provided with a connection The force applying arm of the upper cover is provided with a resistance arm connected to the front end of the paper take-up module at the other end. The automatic feeding device of claim 2, wherein the paper taking module is provided with a holding frame, the holding frame is provided with a top wall and a side wall, a top surface of the top wall is provided with a buckle groove, and the torsion spring is pivotally connected to the side wall In the middle, the resistance arm is buckled in the buckle groove. The automatic feeding device of claim 3, wherein the upper cover is provided with at least one vertically extending card slot on both sides of the paper take-up module, and the force applying arm abuts the top card slot. The automatic feeding device of claim 1, wherein the outer surface of the body is provided with a protrusion along an axial direction thereof, and a spring piece is disposed below the hook, and the elastic piece is spaced apart from the body of the hook by a hook. When rotated, the projections press against the shrapnel. The automatic feeding device of claim 1, wherein the paper take-up module is provided with an abutting surface for resisting the first barb to limit the rotation angle of the hook. The automatic feeding device of claim 1, wherein the paper taking module is provided with a holding frame, and the holding frame is provided with a side wall, and the sliding gear, the hook, the baffle and the second follower gear are pivotally connected to the side wall.