TWM616872U - Paper feeding mechanism - Google Patents

Abstract

A paper feeding mechanism includes: a paper feeding channel; a driving motor that can controllably output reverse and forward driving forces; a one-way transmission mechanism, the one-way transmission mechanism and the drive motor Connection; at least one paper stop wheel connected with the one-way transmission mechanism, the one-way transmission mechanism transmits the forward driving force to the paper stop wheel when the drive motor outputs the reverse driving force, and when the When the driving motor outputs a forward driving force, it does not output driving force to the paper blocking wheel; a two-way transmission mechanism, the two-way transmission mechanism is connected with the driving motor, and at least one paper feeding wheel is connected with the two-way transmission mechanism When the driving motor outputs a reverse or forward driving force, the two-way transmission mechanism transmits the forward driving force to the paper feeding wheel.

Description

Paper feeding mechanism

This creation relates to a paper feeding mechanism, in particular to a paper feeding mechanism that can eliminate paper skew using a single drive motor.

Paper skew means that the leading edge of the paper is not parallel to the axis of the paper feed roller during the feeding process. When paper skew occurs, it is easy to cause paper jams or affect the quality of scanned images or printed images. Therefore, a set of skew-removing rollers are provided in the conventional paper feeding mechanism to eliminate paper skew. Please refer to FIG. 6, the conventional skew removing roller 70 is arranged in the paper feeding channel and located downstream of the paper picking roller 72. The skew removing roller 70 is driven by an independent control motor 71, so that the rotation time and direction of the skew removing roller 70 are independent of the paper picking roller 72.

Referring to Figures 7 and 8, when the paper pick roller 72 starts to feed paper, the skew roller 70 remains stationary, so when the skewed paper is fed by the paper pick roller 70 to the skew roller At the position of 70, the leading edge of the paper is blocked by the skew-removing roller 70 and is flush with the axial direction of the skew-removing roller 70. After the paper skew is eliminated, the skew removing roller 70 resumes rotation and feeds the paper in the downstream direction.

However, adding an independent control motor will increase the manufacturing cost. Therefore, it is necessary to provide a paper feeding mechanism that can eliminate paper skew by using a single drive motor.

The purpose of this creation is to provide a paper feeding mechanism that can eliminate paper skew using only a single drive motor.

In order to achieve the above objectives, a paper feeding mechanism of the present creation includes: a paper feeding channel; a driving motor that can controllably output reverse and forward driving forces; and a two-way transmission mechanism, the two-way transmission The mechanism is connected with the driving motor to transmit driving force; at least one paper feeding wheel is installed in the paper feeding channel and connected with the two-way transmission mechanism; a one-way transmission mechanism, the one-way transmission mechanism and the drive motor Connected to convey the driving force; and at least one paper stop wheel installed in the paper feeding channel and arranged at a position downstream of the paper feed wheel, the paper stop wheel is connected with the one-way transmission mechanism; and wherein when the When the driving motor outputs the reverse driving force, the two-way transmission mechanism transmits the forward driving force to the paper feeding wheel, and the one-way transmission mechanism transmits the forward driving force to the paper blocking wheel; and when the driving When the motor outputs the forward driving force, the two-way transmission mechanism transmits the forward driving force to the paper feeding wheel, and the one-way transmission mechanism does not transmit the driving force to the paper blocking wheel.

In a preferred embodiment, wherein the one-way transmission mechanism includes a transmission shaft, the transmission shaft is connected with the drive motor to transmit driving force; a wheel shaft, the wheel shaft is rotatably sleeved on the transmission On the shaft and connected with the paper stop wheel; and a torsion spring, a fixed end of the torsion spring is connected and fixed on the transmission shaft, and a free end of the torsion spring is sleeved on the outer circumference of the wheel shaft Side; and wherein the direction of rotation of the torsion spring is forward, so when the transmission shaft rotates in the forward direction, the inner diameter of the torsion spring is affected by friction and shrinks.

In a preferred embodiment, the transmission shaft is provided with a blind hole, and the fixed end is provided with a hook, and the hook is inserted into the blind hole so that the torsion spring follows the transmission shaft Rotate.

In a preferred embodiment, wherein the two-way transmission mechanism includes an input gear connected to the drive motor to transmit driving force; a forward swing arm, the forward swing arm is pivotally connected coaxially On the input gear; a reverse swing arm, the forward swing arm is pivotally connected to the input gear coaxially; a forward gear set, the forward gear set is arranged on the forward swing arm The upper part moves with the forward swing arm and is connected with the input gear to transmit driving force; a reverse gear set, the reverse gear set is arranged on the reverse swing arm to follow the The reverse swing arm moves and is connected with the input gear to transmit driving force; an output gear set, the output gear set is arranged at the intersection of the forward swing arm and the reverse swing arm swing path and is connected to the The paper feeding wheel is connected; and wherein the forward gear set reverses the direction of the driving force when transmitting the driving force, and when the driving motor outputs the reverse driving force, the forward swing arm swings to the output Gears so that the driving force is transmitted to the output gear through the forward gear set; the reverse gear set keeps the direction of the driving force unchanged when the driving force is transmitted, and when the drive motor outputs a forward drive When the force is applied, the reverse swing arm swings toward the output gear so that the driving force is transmitted to the output gear via the reverse gear set.

In a preferred embodiment, the forward swing arm and the reverse swing arm are integrally formed.

In a preferred embodiment, the output gear set includes a relay gear disposed at the intersection of the swing paths of the forward swing arm and the reverse swing arm, and a relay gear meshed with the relay gear An output gear connected with the paper feeding wheel.

In a preferred embodiment, the reverse gear set includes an odd number of reverse gears meshing with each other and an odd number of compression springs assembled between the reverse gear and the reverse swing arm.

In a preferred embodiment, the forward gear set includes an even number of forward gears meshing with each other and an even number of compression springs assembled between the forward gear and the forward swing arm.

In order to explain in detail the technical content, structural features, goals and effects achieved in this creation, the following examples are given in conjunction with the diagrams to explain in detail.

Due to the fact that there are so many directions in which the transmission structure is set up, it is impossible to list them all. Therefore, for the convenience of description, the rotation direction of the paper feed roller is used as a reference when describing the rotation direction of the components and the driving force in this specification. The so-called forward direction is defined as the rotation direction of the paper feeding roller to feed the paper in the downstream direction of the paper feeding channel, and the so-called reverse direction is defined as the rotation direction of the paper feeding wheel to feed the paper in the upstream direction of the paper feeding channel .

Please refer to the first to third figures. In order to achieve the above purpose, a paper feeding mechanism 100 of the present creation includes: a paper feeding channel 10; A two-way transmission mechanism 30, the two-way transmission mechanism 30 is connected with the drive motor 20 to transmit the driving force; at least one paper feeding wheel 40, installed in the paper feeding channel 10 and with the two-way transmission mechanism 30 connected; a one-way transmission mechanism 50, the one-way transmission mechanism 50 is connected with the drive motor 20 to transmit driving force; and at least one paper stop wheel 60 installed in the paper feeding channel 10 and arranged in the feed At a position downstream of the paper wheel 40, the paper stop wheel 60 is connected to the one-way transmission mechanism 50.

Therefore, when the driving motor 20 outputs the forward driving force, the two-way transmission mechanism 30 transmits the forward driving force to the paper feeding wheel 40, and the one-way transmission mechanism 50 does not transmit the driving force to the paper stopper. Round 60. At this time, the paper is driven downstream by the paper feed roller 40, and the leading edge of the paper is aligned with the paper stop roller 60 after contacting the paper stop roller 60, thereby eliminating the skew of the paper. When the driving motor 20 outputs the reverse driving force, the two-way transmission mechanism 30 transmits the forward driving force to the paper feeding wheel 40, and the one-way transmission mechanism 50 transmits the forward driving force to the resistance. The paper wheel 60 further feeds the skew-eliminated paper further downstream.

In the embodiment shown in the second and third figures, in order to simplify the overall structure, the two-way transmission mechanism 30 is connected to the drive motor 20 through the one-way transmission mechanism 50. The one-way transmission mechanism 50 is connected to two symmetrical paper stop wheels 60, and includes a transmission shaft 51 that is connected to the drive motor 20 to transmit driving force, and the transmission shaft 51 are provided with two blind holes 54; two axles 52, the two axles 52 are rotatably sleeved on the transmission shaft 51 and connected with the two paper resistance wheels 60; and two torsion springs 53, the two Each of the torsion springs 53 is provided with a hook 55 at a fixed end, and the hook 55 is inserted into the blind hole 54 to connect and fix the two torsion springs 53 on the transmission shaft 51 and follow the transmission shaft 51. Rotate, and the two torsion springs 53 are respectively sleeved on the outer peripheral side of the two wheel shafts 52 with a free end; and the rotation direction of the two torsion springs 53 is the forward direction, so when the transmission shaft 51 is in the forward direction The friction force received by the two torsion springs 53 during the forward rotation will further tighten the two torsion springs 53, thereby causing the inner diameters of the two torsion springs 53 to contract and clamp the two wheel shafts 52 individually. However, when the transmission shaft 51 rotates in the reverse direction, the friction force received by the two torsion springs 53 will relax the two torsion springs 53, and then the two torsion springs 53 will rotate idly.

The two-way transmission mechanism 30 includes an input gear 31, which is connected to the drive motor 20 through the transmission shaft 51 to transmit driving force; a forward swing arm 32 and a reverse swing arm 32 are integrally formed. A swing arm 33, the forward swing arm 32 is pivotally connected to the input gear 31 coaxially, and the forward swing arm 32 is also pivotally connected to the input gear 31 coaxially; a forward gear set 34 , The forward gear set 34 is arranged on the forward swing arm 32 to move with the forward swing arm 32, and is connected with the input gear 31 to transmit driving force; a reverse gear set 35, The reverse gear set 35 is arranged on the reverse swing arm 33 to move with the reverse swing arm 33, and is connected with the input gear 31 to transmit driving force; an output gear set 37, the The output gear set 37 is arranged at the intersection of the swing paths of the forward swing arm 32 and the reverse swing arm 33 and is connected to the paper feed wheel 40.

Please refer to the second, fourth, and fifth figures again. In this embodiment, the output gear set 37 includes one set at the intersection of the swing path of the forward swing arm 32 and the reverse swing arm 33 And an output gear 372 meshed with the relay gear 371 and connected with the paper feed wheel 40.

The reverse gear set 35 includes a reverse gear 351 and a set of compression springs 36 connected between the reverse gear 351 and the reverse swing arm 33, so that the driving force is reduced when the driving force is transmitted. The direction is reversed. The spring applies a resistance to the reverse gear 351. Therefore, when the driving motor 20 outputs a reverse driving force, the reverse gear 351 is driven by the input gear 31 with the input gear 31 As the center rotates in the reverse direction, the reverse swing arm 33 is swung toward the relay gear 371. The reverse driving force is reversed through the reverse gear set 35 and then transferred to the relay gear 371, and then reversed by the relay gear 371 and then transferred to the output paper gear. Therefore, the The output gear 372 rotates in the forward direction.

The forward gear set 34 includes two forward gears 341 meshing with each other and two sets of compression springs 36 connected between the forward gear 341 and the forward swing arm 32. Therefore, when the driving force is transmitted Keep the direction of the driving force unchanged. The spring applies a resistance to the forward gear 341. When the drive motor 20 outputs a forward driving force, the forward gear 341 uses the input gear 31 as the input gear 31 under the drive of the input gear 31. The center rotates in the forward direction, so that the forward swing arm 32 swings toward the relay gear 371. The forward driving force is directly transmitted to the relay gear 371 via the forward gear set 34, and then is reversed by the relay gear 371 and then transmitted to the output paper gear. Therefore, the output gear 372 rotates in the forward direction.

100: Paper feeding mechanism 10: Paper feed channel 20: Drive motor 30: Two-way transmission mechanism 31: Input gear 32: Swing arm forward 33: Reverse swing arm 34: Forward gear set 341: Forward Gear 35: Reverse gear set 351: Reverse Gear 36: Compression spring 37: output gear set 371: Relay Gear 372: output gear 40: paper feed wheel 50: One-way transmission mechanism 51: drive shaft 52: Axle 53: Torsion Spring 54: Blind Hole 55: Hook 60: Paper resistance wheel 70: In addition to skew roller 71: control motor 72: paper pick roller

The first figure is a schematic cross-sectional view of the paper feeding mechanism in this creation; The second picture is an exploded view of the paper feeding mechanism in this creation; The third picture is an exploded diagram of the one-way transmission mechanism in this creation; The fourth figure is a schematic diagram of the action of the paper feeding mechanism when the driving motor outputs the reverse driving force in this creation; The fifth figure is a schematic diagram of the action of the paper feeding mechanism when the drive motor outputs forward driving force in this creation; The sixth figure is a schematic cross-sectional view of the conventional paper feeding mechanism; The seventh figure is a schematic diagram of the paper skewed; The eighth figure is a schematic diagram of eliminating paper skew.

100: Paper feeding mechanism

10: Paper feed channel

20: Drive motor

30: Two-way transmission mechanism

40: paper feed wheel

50: One-way transmission mechanism

60: Paper resistance wheel

Claims (8)

A paper feeding mechanism, including: A paper feeding channel; A drive motor that can controllably output reverse and forward drive forces; A two-way transmission mechanism, the two-way transmission mechanism is connected with the drive motor to transmit driving force; At least one paper feeding wheel installed in the paper feeding channel and connected with the two-way transmission mechanism; A one-way transmission mechanism, the one-way transmission mechanism is connected with the drive motor to transmit driving force; and At least one paper stop wheel is installed in the paper feeding channel and arranged at a position downstream of the paper feed wheel, and the paper stop wheel is connected to the one-way transmission mechanism; and wherein When the driving motor outputs the reverse driving force, the two-way transmission mechanism transmits the forward driving force to the paper feeding wheel, and the one-way transmission mechanism transmits the forward driving force to the paper blocking wheel; When the driving motor outputs a forward driving force, the two-way transmission mechanism transmits the forward driving force to the paper feeding wheel, and the one-way transmission mechanism does not transmit the driving force to the paper blocking wheel. The paper feeding mechanism according to claim 1, wherein the one-way transmission mechanism includes a A transmission shaft, the transmission shaft is connected with the drive motor to transmit driving force; a wheel shaft, The wheel shaft is rotatably sleeved on the transmission shaft and connected with the paper stop wheel; And a torsion spring, a fixed end of the torsion spring is connected and fixed on the transmission shaft, and A free end of the torsion spring is sleeved on the outer peripheral side of the axle; and wherein the torsion spring The direction of rotation is forward, so when the drive shaft rotates in the forward direction, the inner part of the torsion spring The diameter is affected by friction and shrinks. The paper feeding mechanism according to claim 2, wherein a blind hole is provided on the transmission shaft, And the fixed end is provided with a hook, and the hook is inserted into the blind hole to make the torsion spring follow The drive shaft rotates. The paper feeding mechanism according to claim 1, wherein the two-way transmission mechanism includes a An input gear, the input gear is connected with the driving motor to transmit driving force; A forward swing arm, the forward swing arm is pivotally connected to the input gear coaxially; a reverse A swing arm, the forward swing arm is pivotally connected to the input gear coaxially; A forward gear set, the forward gear set is arranged on the forward swing arm to follow the The swing arm moves in the forward direction and is connected with the input gear to transmit driving force; A reverse gear set, the reverse gear set is arranged on the reverse swing arm to follow the The reverse swing arm moves and is connected with the input gear to transmit driving force; An output gear set, the output gear set is arranged on the forward swing arm and the reverse To the intersection of the swing path of the swing arm and connected to the paper feed wheel; and wherein The forward gear set reverses the direction of the driving force when transmitting the driving force. When the driving force is When the motor outputs the reverse driving force, the forward swing arm swings to the output gear so that the The driving force is transmitted to the output gear via the forward gear set; The reverse gear set keeps the direction of the driving force unchanged when transmitting the driving force, and when the When the driving motor outputs a forward driving force, the reverse swing arm swings toward the output gear The driving force is transmitted to the output gear via the reverse gear set. The paper feeding mechanism according to claim 4, wherein the forward swing arm and the reverse The swing arm is integrally formed. The paper feeding mechanism according to claim 4, wherein the output gear set includes a device Relay placed at the intersection of the swing path of the forward swing arm and the reverse swing arm Gear, and an output gear meshed with the relay gear and connected with the paper feed wheel wheel. The paper feeding mechanism according to claim 6, wherein the reverse gear set includes an odd number Two reverse gears that mesh with each other and are connected to the reverse gear and the reverse Odd number of compression springs between the swing arms. The paper feeding mechanism according to claim 6, wherein the forward gear set includes an even number Forward gears that mesh with each other and are connected to the forward gears and the forward gears An even number of compression springs between the swing arms.

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