TWM518635U - Sheet-feeding device - Google Patents

Abstract

The invention provides a sheet-feeding device. The sheet-feeding device includes a feeding shaft; a ratchet holder configured on the feeding shaft and rotating with the feeding shaft; a ratchet rotatably and slidably configured on the feeding shaft, wherein the ratchet and the ratchet holder engage with each other; a gear rotatably configured on the feeding shaft to receive a power so as to rotate, wherein the gear and the ratchet operate in coordination and drive the feeding shaft via the ratchet to feed a paper; and an elastic element configured between the gear and the ratchet to make the ratchet return to the engagement position after the ratchet is moved, wherein when the paper is pulled out, the pulled paper causes the feeding shaft to rotate and then the ratchet holder rotates with the feeding shaft to push the ratchet toward the gear so as to release the engagement between the ratchet holder and the ratchet, and the elastic element pushes the ratchet to the original position of the engagement between the ratchet and the ratchet holder soon afterwards.

Description

Paper feeding device

The present invention relates to a paper feeding device, and more particularly to a paper feeding device capable of quickly eliminating the paper jam condition without damaging the paper.

In today's enterprises or companies, business machines are already indispensable for office work, and most of the current business machines on the market have paper feeding functions, whether they are photocopiers, fax machines, scanners, multifunction machines, etc. At least there will be a paper feeding device for the user to follow up the procedure. The current transaction machine will be equipped with an Auto Document Feeder (ADF) on the cover module, and as the technology matures, the automatic paper feed device not only feeds paper faster, but also scans the paper. Brands are also diversified, so it is inevitable that there will be paper jams.

Please refer to FIG. 1 , which is a schematic diagram of a conventional paper feeding device 10 having a paper feed shaft 11 , a paper feed roller 12 , a paper feed gear 13 , a power gear 14 , and a power rotating shaft 15 . The power gear 14 is disposed on the power rotating shaft 15 and rotates synchronously with the power rotating shaft 15, and the paper feeding roller 12 and the paper feeding gear 13 are disposed on the paper feeding rotating shaft 11 and rotate simultaneously with the paper feeding rotating shaft 11, wherein the power gear 14 and the power transmitting gear 14 the paper feeding gear 13 is engaged, when the paper feeding direction D ₁ would like device 10 transfer paper 16, the power shaft 15 start rotating, the gear 14 also rotates with the power, in turn drives the feed gear 13 is rotated, so that the paper feeding The rotating shaft 11 drives the paper feed roller 12 to rotate to convey the paper 16. Generally, when the paper feeding apparatus 10 jams, the power shaft 15 stops the rotation, if there is no paper feeding gear 13 to the gear 14 of the power phases were separated, then the user whether from _a D or reverse direction to paper 16 drawn The paper 16 will be damaged by the frictional force due to the interlocking relationship between the paper feed roller 12 and the power rotating shaft 15, which may cause the user to easily remove the paper jam and damage the paper.

In order to overcome the problems caused by the prior art, the inventors have proposed the "feeding device" of the present invention. With the paper feeding device of the present invention, the user can smoothly eliminate the jam and prevent the paper from being jammed when the user encounters a jam. damage.

This creation provides a paper feeding device. The paper feeding device includes: a paper feed rotating shaft; a ratchet support member disposed on the paper feed rotating shaft to rotate with the paper feeding rotating shaft, and having at least one pawl; a ratchet wheel rotatably and slidably configured On the paper feed shaft, there is a first side and a second side, the first side has at least one pawl, the second side has at least one protrusion; and a gear is rotatably disposed on the feed The paper rotating shaft has at least one gear tooth portion and at least one protruding portion, wherein the at least one gear tooth portion is configured to receive a power to rotate, and the at least one protruding portion of the gear wheel cooperates with the at least one protruding portion of the ratchet wheel The ratchet is driven to engage the at least one pawl of the ratchet with the at least one pawl of the ratchet support to drive the paper feed shaft to convey a sheet of paper. Furthermore, when the paper is drawn by an external force, the paper drives the paper feed shaft to rotate, and the ratchet support rotates with the paper feed shaft, so that the at least one pawl of the ratchet support pushes the ratchet The at least one pawl moves the ratchet toward the gear to release engagement between the ratchet support and the ratchet.

Preferably, as described above, the at least one projection of the gear and the at least one projection of the ratchet are configured to cause the ratchet to face the ratchet after the gear is driven by the power The direction of the support moves until it engages the ratchet support with the ratchet support.

Preferably, the paper feeding device further includes an elastic member disposed between the gear and the ratchet to move the ratchet in the direction of the gear and then move in the direction of the ratchet support.

Preferably, the paper feeding device as described above further includes a gasket disposed between the elastic member and the ratchet support.

Preferably, in the paper feeding device as described above, the paper feed shaft has a D-shaped portion, and the ratchet support member has a D-shaped groove, and the D-shaped portion passes through the D-shaped groove to make the ratchet support member The paper feed shaft is combined.

Preferably, in the paper feeding device as described above, the at least one pawl of the ratchet support has a slope, and the at least one pawl of the ratchet has a slope.

Preferably, in the paper feeding device as described above, the at least one protrusion of the gear has a slope, and the at least one protrusion of the ratchet has a slope.

Preferably, as described above, the paper feeding device has a restricting member for restricting movement of the gear on the paper feed shaft.

Preferably, in the paper feeding device as described above, the limiting member is a hook or an E-ring.

Preferably, the paper feeding device as described above is an automatic paper feeding device.

This creation provides another paper feeding device. The paper feeding device includes: a paper feeding rotating shaft; a ratchet support member disposed on the paper feeding rotating shaft to rotate with the paper feeding rotating shaft; a ratchet wheel, Rotatingly and slidably disposed on the paper feed shaft, the ratchet meshes with the ratchet support; a gear rotatably disposed on the paper feed shaft to receive a power to rotate, the gear and The ratchet cooperates to drive the ratchet to drive the paper feed shaft to convey a sheet of paper by the ratchet support; and an elastic member disposed between the gear and the ratchet to move the ratchet Returning to a position originally engaged with the ratchet support member, wherein when the paper is drawn by an external force, the paper drives the paper feed shaft to rotate, and the ratchet support member rotates with the paper feed shaft So that the ratchet support pushes the ratchet to move the ratchet in the direction of the gear to release the engagement between the ratchet support and the ratchet, and then the elastic element pushes the ratchet back to the ratchet support This position is engaged.

Preferably, the paper feeding device as described above, the elastic member is a spring.

This paper also provides another paper feeding device. The paper feeding device includes: a paper feed rotating shaft; a ratchet support member disposed on the paper feed rotating shaft to rotate with the paper feeding rotating shaft; a ratchet wheel rotatably and slidably disposed on the paper feeding rotating shaft; And a gear rotatably disposed on the paper feed shaft to receive a power to rotate, the gear cooperates with the ratchet to drive the ratchet, and the ratchet meshes with the ratchet support, thereby driving the feed a paper rotating shaft for conveying a paper, wherein when the paper is drawn by an external force, the paper drives the paper feeding shaft to rotate, and the ratchet support rotates with the paper feeding shaft, so that the ratchet support pushes The ratchet releases the ratchet in the direction of the gear to release engagement between the ratchet support and the ratchet.

The creation is a paper feeding device that cooperates with a ratchet and a gear. The internal mechanism module is easy to assemble and has high stability. When the paper jam is discharged, the paper feeding shaft is disconnected from the transmission module, so that the user can quickly Eliminate the jam condition and it is not affected by the drive module, so it is not To destroy the paper or to break the paper.

10‧‧‧Feeding device

11‧‧‧Feed shaft

12‧‧‧Feed roller

13‧‧‧ Feeding gear

14‧‧‧Power gear

15‧‧‧Power shaft

16‧‧‧ Paper

20‧‧‧Feeding device

21‧‧‧Feed shaft

211‧‧‧Rotary body

212‧‧‧D-shaped parts

22‧‧‧Feed roller

23‧‧‧ Gears

231‧‧‧ teeth

232‧‧‧protrusion

2321‧‧‧Bevel

233‧‧‧ bottom

24‧‧‧ratchet

241‧‧‧ pawl

2411‧‧‧Bevel

242‧‧‧Protruding

2421‧‧‧Bevel

25‧‧‧ratchet support

251‧‧‧ pawl

2511‧‧‧Bevel

252‧‧‧D-shaped groove

26‧‧‧Transmission gear

27‧‧‧ Paper

28‧‧‧Restrictive components

281‧‧‧ protruding parts

30‧‧‧Feeding device

31‧‧‧Feed shaft

311‧‧‧Rotary body

312‧‧‧D-shaped parts

32‧‧‧Feed roller

33‧‧‧ Feeding gear

331‧‧‧ teeth

332‧‧‧ protruding parts

333‧‧‧ bottom

34‧‧‧ratchet

341‧‧‧ pawl

3411‧‧‧Bevel

342‧‧‧Protruding

343‧‧‧shims

35‧‧‧ratchet support

351‧‧‧ pawl

3511‧‧‧Bevel

352‧‧‧D-shaped groove

36‧‧‧Transmission gear

37‧‧‧Flexible components

38‧‧‧ Paper

39‧‧‧Restricted components

391‧‧‧Protruding

1 is a schematic view of a conventional paper feeding device; 2 (a) is a schematic view of a first embodiment of the present creation; and 2 (b) is an exploded view of the first embodiment of the present creation; 2 (c) Figure 2 is a schematic view of the first embodiment of the present invention; the second (d) is a schematic view of the first embodiment of the present invention; and the third (a) is a schematic view of the second embodiment of the present invention; 3(b) is an exploded view of the second embodiment of the present creation; FIG. 3(c) is a schematic view of the second embodiment of the present invention when feeding paper; and FIG. 3(d) is a second embodiment of the present creation Schematic diagram of paper.

Please refer to FIG. 2(a), which is a schematic diagram of the first embodiment of the creation. In the first embodiment of the present invention, the paper feeding device 20 has a paper feed shaft 21, a paper feed roller 22, a gear 23, a ratchet wheel 24, a ratchet support member 25, and a transmission gear 26, wherein the paper feed roller 22 and the ratchet support member 25 are both It is disposed on the paper feed shaft 21 and rotates with the paper feed shaft 21, and when the paper feed roller 22 rotates, the paper feed roller 22 imparts a frictional force to the paper 27, thereby causing the paper to be conveyed to the predetermined position by the paper feeding device 20. On the other hand, if the paper feed roller 22 or the ratchet support member 25 is rotated by an external force, the paper feed shaft 21 will also rotate accordingly, and the rotation thereof may be simultaneous rotation, rotation at the same time, or rotation by the relevant member. The gear 23 and the ratchet 24 are rotatably disposed on the paper feed shaft 21, which may be partially rotatable or fully rotatable.

Please refer to FIG. 2(b), which is an exploded view of the first embodiment of the creation. The paper feed shaft 21 in the first embodiment mainly includes a rotating shaft body 211 and a D-shaped portion 212. The gear 23 mainly includes a protruding portion 232, a gear tooth portion 231 and a bottom portion 233. The ratchet wheel 24 mainly includes a protruding portion 242 and has a sloped surface 2411. The pawl 241, the ratchet support 25 mainly includes a pawl 251 having a sloped surface 2511, and the restraining member 28 mainly includes a projection 281. Further description of the above related elements is as follows.

The spindle body 211 of the paper feed shaft 21 can carry the paper feed roller 22 (refer to FIG. 2(a)) and the restriction member 28, and the paper feed roller 22 rotates with the spindle body 211. The D-shaped portion 212 of the paper feed shaft 21 can carry the gear 23, the ratchet 24 and the ratchet support 25, and the ratchet 24 is disposed between the gear 23 and the ratchet support 25. The shaft body 211 and the D-shaped portion 212 may be connected in combination or integrally formed, and the D-shaped portion 212 is not limited to the D shape, and other shapes may be used. In addition, the D-shaped portion 212 allows the user to save time in assembly. If the D-shaped portion 212 is not used, the gear 23, the ratchet 24, and the ratchet support 25 can still be disposed on the spindle body 211.

The ratchet 24 is a simple transmission component which may be made of plastic or of other materials. It has at least one projection 242 on the right side and at least one pawl 241 on the left side, and the projection 242 has a slope 2421, the spine. The claw 241 has a slope 2411. The ratchet 24 can slide left and right on the paper feed shaft 21, and if the right projection 242 is subjected to the leftward component, the ratchet 24 will move to the left in the direction of the ratchet support 25 until it engages with the ratchet support 25. Conversely, if the left pawl 241 is subjected to a rightward component, the ratchet 24 will move to the right in the direction of the gear 23 until it meshes with the gear 23.

The ratchet support 25 can be a plastic piece or of other materials having at least one pawl 251 on the right side and the pawl 251 has a bevel 2511. When the ratchet support 25 follows When the paper feed shaft 21 rotates, the ratchet support member 25 provides a rightward component to the inclined surface 2411 of the ratchet 24 by the inclined surface 2511 of the pawl 251 to move the ratchet 24 to the right until the slopes of the two are no longer in contact. The ratchet support 25 can have a D-shaped groove 252 corresponding to the D-shaped portion 212 of the paper feed shaft 21 (corresponding to the shape of the D-shaped portion, and the shape of the D-shaped groove is determined according to the shape thereof), and the D-shaped groove 252 is used to feed the paper. The rotating shaft 21 is combined. When the transmission module (not shown) drives the ratchet support 25 via the gear 23 and the ratchet 24, power can be transmitted to the paper feed shaft 21 for conveying the paper 27, preferably a ratchet support. 25 and the paper feed shaft 21 are synchronized and rotate in the same direction, but not limited thereto.

The gear 23 meshes with the transmission gear 26 (refer to FIG. 2(a)) by the gear tooth portion 231, and is matched with the transmission module by the transmission gear 26, and when the transmission module operates, the power is transmitted by the transmission gear 26 is transmitted to the gear 23, and at least one of the projections 232 of the gear 23 rotates to move the ratchet 24 to the left to engage with at least one of the projections 242 of the ratchet 24, thereby causing the ratchet 24 to rotate, thereby making the ratchet 24 The pawl 241 is engaged with the pawl 251 of the ratchet support 25, and finally drives the paper feed shaft 21. Further, the gear 23 may have a hook (not shown) or an E-Ring (not shown) to restrict the left and right sliding of the gear 23.

The restricting member 28 is disposed on the spindle body 211 of the paper feed shaft 21, and is coupled to the bottom portion 233 of the gear 23 through the projection portion 281 thereof to restrict the sliding of the gear 23. If the gear 23 itself has other structures to limit its own sliding, the restraining element 28 may not be provided in the paper feeding device 20.

Please refer to FIG. 2(c), which is a schematic view of the first embodiment of the present invention when feeding paper. When the paper feeding device 20 is ready to start conveying the paper 27 (refer to Fig. 2(a)), the transmission module will be driven first, and the generated power will start to drive the transmission gear 26, and the transmission gear 26 and the gear 23 When meshed, the gear 23 will rotate with the rotation of the transmission gear 26. At this time, the protruding portion 232 of the gear 23 gives a leftward component of the ratchet 24 due to contact with the inclined surface 2421 of the protruding portion 242 of the ratchet 24, and after the ratchet 24 receives the component to the left, it starts to support the ratchet. The member 25 moves until it is fully engaged with the gear 23 or is fully engaged with the ratchet support 25. When the ratchet 24 stops moving, the gear 23, the ratchet 24 and the ratchet support 25 start to rotate synchronously, thereby driving the paper feed shaft 21 to rotate, and the paper feed roller 22 that rotates with the paper feed shaft 21 provides friction to The paper 27 that is in contact, and thus the paper 27, is conveyed to a predetermined position, and the paper feed shaft 21 is driven to rotate clockwise as an example, and the paper 27 is conveyed in the direction of D ₂ (refer to Fig. 2(a)).

Please refer to FIG. 2(d), which is a schematic view of the first embodiment of the present invention when taking paper. When the paper feeding device 20 encounters a paper jam, the transmission module (refer to Fig. 2(a)) will stop supplying power first, and when the user applies an external force, the paper 27 is directed to the D ₂ direction (refer to the second (a) When drawing, the paper feed roller 22 (refer to Fig. 2(a)) is rotated by the frictional force generated when the paper 27 is taken, thereby driving the paper feed shaft 21 and the ratchet support member 25 When the hour hand rotates, the ratchet support 25 and the ratchet 24 which are originally engaged with each other are separated, and the rotation of the ratchet support 25 causes the inclined surface 2511 of the ratchet support 25 to provide a rightward component to the inclined surface 2411 of the ratchet 24. The ratchet 24 is moved to the right in the direction of the gear 23 until the inclined faces of the two are no longer in contact (at this time, the projection 242 of the ratchet 24 (refer to FIG. 2(b)) has been slid along the inclined surface 2321 of the gear 23) . At the same time, the engagement between the ratchet support 25 and the ratchet 24 is completely released. In other words, the rotation of the ratchet support 25 no longer drives the ratchet 24, thereby causing the paper feed shaft 21 and the drive module to be disconnected. In the state, taking the paper 27 in the D ₂ direction (refer to Fig. 2(a)) as an example, the paper feed shaft 21 is rotated clockwise due to the frictional force imparted by the paper 27. Since the paper feed shaft 21 and the transmission module are in an open state, the user does not easily take out the paper 27 because the paper feed shaft 21 and the transmission module are in a linked state when the paper 27 is extracted, or even cause the paper 27 Broken.

Please refer to FIG. 3(a), which is a schematic diagram of a second embodiment of the creation. In the second embodiment of the present invention, the paper feeding device 30 has a paper feed shaft 31, a paper feed roller 32, a paper feed gear 33, a ratchet 34, a ratchet support 35, a transmission gear 36, and an elastic member 37, wherein the elastic member 37 is disposed at Between the paper feed gear 33 and the ratchet 34, the paper feed roller 32 and the ratchet support 35 are disposed on the paper feed shaft 31 and rotate with the paper feed shaft 31, and when the paper feed roller 32 rotates, the paper feed roller 32 The paper 38 is frictionally moved so that the paper 38 is conveyed by the paper feeding device 30 to a predetermined position, and vice versa.

Please refer to FIG. 3(b), which is an exploded view of the second embodiment of the creation. The paper feed shaft 31 in the first embodiment mainly includes a rotating shaft body 311 and a D-shaped portion 312. The paper feeding gear 33 mainly includes a protruding portion 332, a gear tooth portion 331 and a bottom portion 333. The ratchet wheel 34 mainly includes a protruding portion 342 having The pawl 341 of the inclined surface 3411 and the spacer portion 343, the ratchet support 35 mainly includes a pawl 351 having a slope 3511, the restricting member 39 mainly including a projection 391, and the elastic member 37 is located at the spacer portion 343 and the tooth portion 331 between. Further description of the above related elements is as follows.

The spindle body 311 of the paper feed shaft 31 can carry the paper feed roller 32 (refer to FIG. 3(a)) and the restriction member 38, and the paper feed roller 32 rotates with the spindle body 311. The D-shaped portion 312 of the paper feed shaft 31 can carry the paper feed gear 33, the ratchet 34 and the ratchet support 35, and the ratchet 34 is disposed between the paper feed gear 33 and the ratchet support 35.

The ratchet wheel 34 has at least one protruding portion 342 on the right side, at least one pawl 341 on the left side, a spacer portion 343 between the protruding portion 342 and the pawl 341, and the protruding portion 342 has a sloped surface 3421, and the pawl 341 has The bevel 3411, the shim portion 343 receives the leftward component of the force provided by the resilient member 37. The ratchet 34 can slide left and right on the paper feed shaft 31. If the right projection 342 is subjected to the leftward component, the ratchet 34 will move to the left in the direction of the ratchet support 35 until it is with the ratchet support 35. If the left pawl 341 is subjected to the rightward component, the ratchet 34 will move to the right in the direction of the paper feed gear 33, after which the elastic member 37 will again give the leftward component force to push the ratchet 34 back. The position originally engaged with the ratchet support 35.

The ratchet support 35 has at least one pawl 351 on the right side, and the pawl 351 has a slope 3511. The ratchet support 35 has a D-shaped groove 352 to be combined with the paper feed shaft 31 in response to the D-shaped portion 312 of the paper feed shaft 31. When the ratchet support 35 rotates with the paper feed shaft 31, the ratchet support 35 provides a rightward component to the inclined surface 3411 of the ratchet 34 by the inclined surface 3511 of the pawl 351, and moves the ratchet 34 to the right until both The bevel is no longer in contact and the resilient member 37 then pushes the ratchet 34 back to its original position.

The paper feed gear 33 is meshed with the transmission gear 36 (refer to FIG. 3(a)) by the gear tooth portion 331, and is matched with the transmission module by the transmission gear 36. When the transmission module operates, the power will be The transmission gear 36 is transmitted to the paper feed gear 33, and at least one of the projections 332 of the paper feed gear 33 rotates and comes into contact with at least one of the projections 342 of the ratchet 34, thereby causing the ratchet 34 to rotate, and the pawl of the ratchet 34 The pawl 351 of the ratchet support member 341 is maintained in mesh with the elastic force of the elastic member 37, so that the ratchet support member 35 also rotates with the ratchet 34, and finally drives the paper feed shaft 31.

The elastic member 37 assists the ratchet 34 to return to the original position after being subjected to an external force, so that the transmission module can smoothly transmit the power to the movable paper feed shaft 31, and the elastic member 37 can be made of a spring or other elastic material, and the elastic member 37 can be used. The arrangement may be between the paper feed gear 33 and the ratchet wheel 34, and is not limited to the outer side of the convex portion 332 of the paper feed gear 33 and the convex portion 342 of the ratchet wheel 34, and may be provided inside. If provided on the inner side, the spacer portion 343 may not be required.

The restricting member 39 is disposed on the spindle body 311 of the paper feed shaft 31, and is coupled to the bottom portion 333 of the paper feed gear 33 through its projection 391 to restrict the slip of the paper feed gear 33. move. If the paper feed gear 33 itself has other structures to limit its own sliding, the restricting member 39 may not be disposed in the paper feeding device 30.

Please refer to FIG. 3(c), which is a schematic view of the second embodiment of the present invention. When the paper feeding device 30 is ready to start conveying the paper 38 (refer to Figure 3(a)), the transmission module will be driven first, and the generated power will start to drive the transmission gear 36 (refer to Figure 3(a)) Since the drive gear 36 and the paper feed gear 33 are engaged, the paper feed gear 33 is rotated by the rotation of the drive gear 36. At this time, the protruding portion 332 of the paper feed gear 33 drives the ratchet wheel 34 to rotate due to contact with the convex portion 342 of the ratchet wheel 34, and the ratchet wheel 34 and the ratchet support member 35 maintain the meshing state due to the elastic force of the elastic member 37. Therefore, the paper feed gear 33, the ratchet 34 and the ratchet support 35 rotate synchronously, thereby driving the paper feed shaft 31 to rotate, and the paper feed roller 32 rotating with the paper feed shaft 31 provides friction to the paper in contact therewith. 38, the paper 38 is further conveyed to a predetermined position, and the paper feed shaft 31 is driven to rotate clockwise as an example, and the paper 38 is conveyed in the direction of D ₃ (refer to Fig. 3(a)).

Please refer to FIG. 3(d), which is a schematic view of the second embodiment of the present invention. When the paper feeding device 30 encounters a paper jam, the transmission module (refer to FIG. 3(a)) stops power supply first, and when the user applies an external force to start drawing the paper 38, the paper feed roller 32 ( Referring to FIG. 3(a), the ratchet support member 35 is rotated by the frictional force generated when the paper 38 is extracted, thereby driving the paper feed shaft 31 and rotating the ratchet support member 35. The ratchet 34 will be disengaged, and the rotation of the ratchet support 35 will cause the ramp 3511 of the ratchet support 35 to provide a rightward component to the ramp 3411 of the ratchet 34, causing the ratchet 34 to move to the right in the direction of the paper feed gear 33 until two When the inclined surface of the person is no longer in contact, the meshing between the ratchet support member 35 and the ratchet wheel 34 is completely released, and then the elastic member 37 returns the ratchet wheel 34 to the position originally engaged with the ratchet support member 35. The actuation will be repeated as the user extracts the paper 38. In other words, repeatedly performing the above actuator has said rotation of the ratchet supporting member 35 has no longer driven by the ratchet wheel 34, so that the paper feed shaft 31 and the drive module are in the OFF state, the sheet 38 in a direction towards D ₃ extraction (see In the case of Fig. 3(a)), the paper feed shaft 31 is rotated clockwise due to the frictional force imparted by the paper 38. Since the paper feed shaft 31 and the transmission module are in an open state, the user does not easily take out the paper 38 because the paper feed shaft 31 and the transmission module are in a linked state when the paper 38 is extracted, or even causes the paper 38 to be pulled. Broken.

The above embodiments are merely illustrative. The paper feeding device proposed in the present application may also be modified. For example, in the first embodiment, the elastic member may be additionally disposed between the ratchet 24 and the gear 23 to utilize the elasticity. The elastic force of the component strengthens the operation of the ratchet 24, and the protruding portion 232 of the gear 23 and the protruding portion 242 of the ratchet 24 can use other shape structures, as long as the relative movement and mutual contact can be achieved to rotate cooperatively. Furthermore, the ratchet 24 The pawl 241 and the pawl 251 of the ratchet support 25 can use other shape configurations as long as the same operation as in the present embodiment can be achieved. In the second embodiment, the convex portion 332 of the paper feed gear 33 and the convex portion 342 of the ratchet wheel 34 can be provided with a rectangular convex portion having no inclined surface, as long as the mutual contact can be achieved by mutual contact, and it is not necessary to use the inclined surface. Structure. It should be noted that the direction in which the paper is conveyed or the direction in which it is drawn is determined by the arrangement of the gears and the ratchet. This creation is for illustrative purposes only and is not limited. In addition, the paper feeding device of the present invention can be applied to an automatic paper feeding device, in particular, an automatic paper feeding device on a lid such as a flatbed scanner, a multifunction printer or a photocopier.

This creation can overcome the problem that the user cannot remove the paper or damage the paper due to the operation of the paper feeding module when the user wants to exclude the paper jam. With the paper feeding device of the present invention, when the paper is jammed, the user can directly pull the paper from the paper output slot (not shown), and the paper will drive the paper feed. When the shaft rotates, the ratchet support will rotate synchronously with the feed shaft (not necessarily synchronized), and the ratchet support will touch the inclined surface of the ratchet, so that the ratchet can be bounced or moved to reach a single direction (OneWay), resulting in a power source Disconnect to achieve quick jam removal. Moreover, since the paper feed shaft is disconnected from the transmission when the paper jam is removed, it does not drive other mechanisms to rotate, so there is no problem that the paper cannot be smoothly extracted or damaged due to the linkage of the transmission module and the paper feed shaft. . In addition, the paper feeding device proposed in the present invention is easy to assemble and repair, thereby reducing production and maintenance costs.

The above is only the preferred embodiment of the present invention, and is not limited to the implementation of the present invention. According to the scope of the patent application and the simple or equivalent change of the disclosure of the patent specification, it should still belong to the present creation. Coverage.

31‧‧‧Feed shaft

311‧‧‧Rotary body

312‧‧‧D-shaped parts

33‧‧‧ Feeding gear

331‧‧‧ teeth

332‧‧‧ protruding parts

333‧‧‧ bottom

34‧‧‧ratchet

341‧‧‧ pawl

3411‧‧‧Bevel

342‧‧‧Protruding

343‧‧‧shims

35‧‧‧ratchet support

351‧‧‧ pawl

3511‧‧‧Bevel

352‧‧‧D-shaped groove

37‧‧‧Flexible components

39‧‧‧Restricted components

391‧‧‧Protruding

Claims (12)

A paper feeding device comprising: a paper feed shaft; a ratchet support member disposed on the paper feed shaft for rotating with the paper feed shaft and having at least one pawl; a ratchet rotatably and slidably Disposed on the paper feed shaft, having a first side and a second side, the first side having at least one pawl, the second side having at least one protrusion; and a gear rotatably disposed on the The paper feed shaft has at least one gear tooth portion and at least one protruding portion, wherein the at least one gear tooth portion is configured to receive a power to rotate, and the at least one protruding portion of the gear wheel is opposite to the at least one protruding portion of the ratchet wheel Cooperating to drive the ratchet such that the at least one pawl of the ratchet engages the at least one pawl of the ratchet support, thereby driving the paper feed shaft to convey a sheet of paper, wherein when the paper is applied When the paper is pulled out by an external force, the paper rotates the paper feed shaft, and the ratchet support rotates with the paper feed shaft, so that the at least one pawl of the ratchet support pushes the at least one pawl of the ratchet Orienting the ratchet toward the gear Movable to release the engagement between the ratchet supporting member and the ratchet wheel. The paper feeding device of claim 1, wherein the at least one protrusion of the gear and the at least one protrusion of the ratchet are configured to cause the ratchet to face when the gear is driven by the power The ratchet support moves in the direction until it engages the ratchet support. The paper feeding device of claim 1, further comprising an elastic member disposed between the gear and the ratchet to move the ratchet toward the gear and then toward the ratchet support mobile. The paper feeding device of claim 1, wherein the paper feed shaft has a D-shaped portion In position, the ratchet support has a D-shaped groove through which the D-shaped portion passes to couple the ratchet support to the paper feed shaft. The paper feeding device of claim 1, wherein the at least one pawl of the ratchet support has a slope, and the at least one pawl of the ratchet has a slope. The paper feeding device of claim 1, wherein the at least one protrusion of the gear has a slope, and the at least one protrusion of the ratchet has a slope. The paper feeding device of claim 1, wherein the gear has a limiting member to limit movement of the gear on the paper feed shaft. The paper feeding device of claim 7, wherein the limiting element is a hook or an E-ring. The paper feeding device described in claim 1 is an automatic paper feeding device. A paper feeding device comprising: a paper feed rotating shaft; a ratchet support member disposed on the paper feed rotating shaft to rotate with the paper feeding rotating shaft; a ratchet wheel rotatably and slidably disposed on the paper feeding rotating shaft The ratchet is engaged with the ratchet support; a gear rotatably disposed on the paper feed shaft to receive a power to rotate, the gear cooperates with the ratchet to drive the ratchet, thereby the ratchet a support member drives the paper feed shaft to convey a sheet of paper; and an elastic member disposed between the gear and the ratchet to move the ratchet back to a state originally engaged with the ratchet support a position, wherein when the paper is drawn by an external force, the paper drives the paper feed shaft to rotate, and the ratchet support rotates with the paper feed shaft, so that the ratchet support pushes the ratchet to make the ratchet Moving in the direction of the gear to release the bit between the ratchet support and the ratchet Then, the elastic member pushes the ratchet back to the position originally engaged with the ratchet support. The paper feeding device of claim 10, wherein the elastic member is a spring. A paper feeding device comprising: a paper feed rotating shaft; a ratchet support member disposed on the paper feed rotating shaft to rotate with the paper feeding rotating shaft; a ratchet wheel rotatably and slidably disposed on the paper feeding rotating shaft And a gear rotatably disposed on the paper feed shaft to receive a power to rotate, the gear cooperates with the ratchet to drive the ratchet to engage the ratchet support member, thereby driving the Feeding the paper shaft to convey a paper, wherein when the paper is drawn by an external force, the paper drives the paper feed shaft to rotate, and the ratchet support rotates with the paper feed shaft, so that the ratchet support The ratchet is pushed to move the ratchet in the direction of the gear to release the engagement between the ratchet support and the ratchet.