Paper separation mechanism and printer

Abstract

The utility model discloses a paper separating mechanism and a printer. The paper separating mechanism comprises a pickup roller, a wheel body, a paper separating piece and a first bias piece. The paper rubbing roller comprises a rotating shaft and a special-shaped roller fixedly connected with the rotating shaft, and the rotating shaft is suitable for being rotationally connected with the machine body to drive the special-shaped roller to rotate. And the wheel body is coaxial with the rotating shaft and is used for preventing the paper separating piece from being in contact with the special-shaped roller when the special-shaped roller is in a non-working state. The paper separating piece is provided with a first paper separating part and a second paper separating part, the first paper separating part corresponds to the special-shaped roller, and the second paper separating part corresponds to the wheel body; the first bias piece enables the first paper separating part to abut against the special-shaped roller, and the second paper separating part is suitable for abutting against the wheel body. The hardness of the first paper separating part is smaller than that of the second paper separating part, and the first paper separating part is small in hardness and large in friction force, so that the paper rubbing effect of the special-shaped roller is guaranteed. Due to the fact that the hardness of the second paper separating part is large, permanent yield deformation is not prone to being generated, pits cannot be formed in the second paper separating part, and the size of the paper inlet cannot be affected.

Description

Technical Field

[0001] The utility model relates to the field of printing devices, and particularly relates to a paper separating mechanism and a printer. Background Art

[0002] In the prior art, a printer usually includes a paper separating mechanism, which includes a paper feed roller, a wheel body, a biasing member and a paper separating member. The paper feed roller includes a rotating shaft and a special-shaped roller fixedly connected to the rotating shaft. The rotating shaft is adapted to be rotatably connected to the machine body, and the wheel body is coaxial with the rotating shaft; the biasing member makes the paper separating member adapted to abut against the special-shaped roller or the wheel body. After a period of use, it is found that the paper feeding effect becomes poor. Summary of the Utility Model

[0003] The purpose of the utility model is to overcome the above-mentioned defects or problems in the background art, and provide a paper separating mechanism and a printer.

[0004] To achieve the above purpose, the utility model and its preferred embodiments adopt the following technical solutions, but the embodiments are not limited to the following solutions:

[0005] Solution 1, a paper separating mechanism adapted to be installed on the machine body of a printer, including

[0006] a paper feed roller, which includes a rotating shaft and a special-shaped roller fixedly connected to the rotating shaft, and the rotating shaft is adapted to be rotatably connected to the machine body,

[0007] a wheel body coaxial with the rotating shaft;

[0008] a paper separating member provided with a first paper separating portion and a second paper separating portion, the first paper separating portion corresponding to the special-shaped roller, the second paper separating portion corresponding to the wheel body, and the hardness of the first paper separating portion being less than the hardness of the second paper separating portion; and when the special-shaped roller abuts against the first paper separating portion, there is a gap between the wheel body and the second paper separating portion; when the wheel body abuts against the second paper separating portion, there is a gap between the special-shaped roller and the first paper separating portion;

[0009] a first biasing member, the two ends of which respectively act on the paper separating member and the machine body, so that the paper separating member moves in a direction towards the wheel body, so that the first paper separating portion is adapted to abut against the special-shaped roller, and the second paper separating portion is adapted to abut against the wheel body.

[0010] Solution 2, based on Solution 1, the friction coefficient of the first paper separating portion is greater than the friction coefficient of the second paper separating portion.

[0011] Solution 3, based on Solution 1, the wheel body is located on both sides of the special-shaped roller.

[0012] Solution 4, based on Solutions 1 to 3, the wheel body is rotatably connected or fixedly connected to the rotating shaft.

[0013] Solution Five. Based on Solution One, the second paper separating part also corresponds to the special-shaped roller, or the paper separating member is further provided with a third paper separating part, the third paper separating part corresponds to the special-shaped roller, and the hardness of the first paper separating part is less than that of the third paper separating part.

[0014] Solution Six. A printer includes a machine body and a paper separating mechanism according to any one of Solutions One to Five.

[0015] Solution Seven. Based on Solution Six, it further includes a paper lifting plate and a second biasing member. The paper lifting plate is adapted to support the paper. Two ends of the second biasing member respectively act on the paper lifting plate and the machine body, so that the topmost paper on the paper lifting plate abuts against the wheel body or the special-shaped roller.

[0016] Solution Eight. Based on Solution Six or Solution Seven, the machine body is provided with a paper storage bin and a flexible part. Papers are stored in the paper storage bin. The flexible part is located between the paper storage bin and the paper separating mechanism. The special-shaped roller is adapted to abut against the flexible part to deform the flexible part, and convey the paper under the clamping of the special-shaped roller and the flexible part.

[0017] Solution Nine. Based on Solution Eight, the special-shaped roller is adapted to be separated from abutting against the flexible part, so that the flexible part returns to its natural state. The height of the flexible part in its natural state is greater than the height of the papers in the paper storage bin. The flexible part is arranged to avoid the wheel body.

[0018] Solution Ten. Based on Solution Nine, there is a gap between the flexible part and the wheel body in the vertical direction, or the flexible part is located between the two wheel bodies.

[0019] As can be seen from the above description of the present invention and its preferred embodiments, compared with the prior art, the technical solutions of the present invention and its preferred embodiments have the following beneficial effects due to the following technical means:

[0020] 1. It is found by the applicant that when paper separation is not carried out, the wheel body and the paper separating member are in contact and under pressure all the time. The paper separating member is usually formed of a relatively soft hard glue. Because the glue has the characteristic of permanent yield deformation, after a long time, the paper separating member will form a pit along the shape of the wheel body, directly affecting the size of the paper inlet, and thus affecting the paper feeding effect.

[0021] In Solution 1 and its preferred embodiments, a paper separating mechanism is adapted to be installed on the body of a printer, and includes a paper feed roller, a wheel body, a paper separating member, and a first biasing member. The paper feed roller includes a rotating shaft and a special-shaped roller fixedly connected to the rotating shaft. The rotating shaft is adapted to be rotatably connected to the body to drive the special-shaped roller to rotate. When the special-shaped roller rotates, it is adapted to switch between a working state and a non-working state. In the working state, paper feeding is achieved. The wheel body is coaxial with the rotating shaft, and the wheel body is used to prevent the paper separating member from contacting the special-shaped roller in the non-working state. The paper separating member is provided with a first paper separating portion and a second paper separating portion. The first paper separating portion corresponds to the special-shaped roller, and the second paper separating portion corresponds to the wheel body. When the special-shaped roller abuts against the first paper separating portion, there is a gap between the wheel body and the second paper separating portion. When the wheel body abuts against the second paper separating portion, there is a gap between the special-shaped roller and the first paper separating portion, so as to realize the state switching of the special-shaped roller. Both ends of the first biasing member act on the paper separating member and the body respectively, so that the paper separating member moves in the direction towards the wheel body, so that the first paper separating portion is adapted to abut against the special-shaped roller, and the second paper separating portion is adapted to abut against the wheel body, so as to maintain the paper separating function of the paper separating member.

[0022] The hardness of the first paper separating portion is less than that of the second paper separating portion. Since the hardness of the first paper separating portion is small, its frictional force is large, so as to ensure the paper feeding effect of the special-shaped roller. Under the action of the first biasing member, the second paper separating portion will be in contact with the second paper separating portion for a long time in the non-working state. Since the hardness of the second paper separating portion is large, it is not easy to produce permanent yield deformation, and no pits will be formed on the second paper separating portion, so as not to affect the size of the paper inlet.

[0023] 2. In Solution 2 and its preferred embodiments, after the special-shaped roller finishes paper feeding, the subsequent paper will be transmitted between the wheel body and the second paper separating portion. Since the friction coefficient of the second paper separating portion is smaller, the transmission resistance of the subsequent paper is smaller, the transmission load is small, and it is less likely to slip, so that the paper can feed normally.

[0024] 3. In Solution 3 and its preferred embodiments, when not working, the force of the first biasing member will be conducted to the special-shaped roller and the rotating shaft through the wheel body. If the wheel body is only located at one end of the special-shaped roller, the force received by the rotating shaft will be uneven. By making the wheel body located on both sides of the special-shaped roller, the force received by the rotating shaft is more uniform.

[0025] 4. In Solution 4 and its preferred embodiments, the wheel body is rotatably connected or fixedly connected to the rotating shaft to achieve assembly. If the wheel body is rotatably connected to the rotating shaft, during the subsequent paper conveying process, due to the force of the paper on the wheel body, the wheel body rotates. Compared with the fixed connection method, the subsequent transmission frictional force is smaller.

[0026] 5. In Solution 5 and its preferred embodiments, the second paper separating portion also corresponds to the special-shaped roller. And because the hardnesses of the first paper separating portion and the second paper separating portion are inconsistent, when contacting the special-shaped roller, a height difference will be generated due to different deformation amounts, and the shape of the paper will also be correspondingly recessed, and the contact area between the paper and the paper separating member becomes larger, so that the resistance received by the second sheet of paper is greater, so as to prevent two sheets of paper from being conveyed simultaneously.

[0027] Similarly, the paper separating member is further provided with a third paper separating portion corresponding to the special-shaped roller. The hardness of the first paper separating portion is less than that of the third paper separating portion, which can also achieve the effect of preventing two sheets of paper from being conveyed simultaneously.

[0028] 6. In Solution Six and its preferred embodiments, a printer includes a machine body and a paper separating mechanism as described above, and has the beneficial effects brought by the above paper separating mechanism.

[0029] 7. In Solution Seven and its preferred embodiments, both ends of the second biasing member act on the paper lifting plate and the machine body respectively, so that the uppermost sheet of paper on the paper lifting plate abuts against the wheel body or the special-shaped roller, so as to be suitable for being rubbed by the special-shaped roller. The paper lifting plate is suitable for supporting the paper and balancing the force of the second biasing member to prevent the paper from being indented due to local pressure.

[0030] 8. In Solution Eight and its preferred embodiments, in the prior art, the paper separating structure can only separate the paper when ensuring that 2 sheets enter simultaneously. If 3 sheets or more are fed in, stable paper feeding cannot be achieved.

[0031] In this solution, the machine body is provided with a paper storage bin and a flexible portion. The paper storage bin stores paper. The flexible portion is located between the paper storage bin and the paper separating mechanism. The special-shaped roller is suitable for abutting against the flexible portion to deform the flexible portion, and the paper is conveyed under the clamping of the special-shaped roller and the flexible portion. When rubbing the paper, the flexible portion will bend in the paper feeding direction under the drive of the special-shaped roller. Since the first sheet of paper directly contacts the special-shaped roller and has a large frictional force, it can enter the paper separating mechanism under the clamping of the special-shaped roller and the flexible portion, and stable paper feeding can be achieved. In this way, the reliability of paper feeding can be increased, so that the number of sheets of paper entering the paper feeding channel is preferably less than or equal to two.

[0032] 9. In Solution Nine and its preferred embodiments, the special-shaped roller is suitable for disengaging from abutting against the flexible portion to enable the flexible portion to return to its natural state. The height of the flexible portion in its natural state is greater than the height of the paper in the paper storage bin. In the non-working state, it can block the paper at the paper storage bin from entering the paper separating mechanism; and after the paper rubbing is completed, it rebounds to the natural state and can also push the subsequent paper adhered to the first sheet of paper back into the paper storage bin. The flexible portion is arranged to avoid the wheel body to ensure that the flexible portion can be deformed only when the special-shaped roller rotates.

[0033] 10. In Solution Ten and its preferred embodiments, there is a gap between the flexible portion and the wheel body in the vertical direction, or the flexible portion is located between two wheel bodies, so as to achieve avoidance. Description of the Drawings

[0034] To more clearly illustrate the technical solutions of the embodiments of the present utility model, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0035] Figure 1 It is a top view of a partial structure of the printer in Embodiment 1;

[0036] Figure 2 It is Figure 1 a cross-sectional view taken along the A-A cutting plane in

[0037] Figure 3 It is Figure 2 an enlarged view of the marked part, at this time the flexible part is bent;

[0038] Figure 4 It is a schematic diagram of the flexible part in the restored natural state in Embodiment 1;

[0039] Figure 5 It is a perspective view of the paper separating part in Embodiment 1;

[0040] Figure 6 It is a top view of the paper separating part in Embodiment 1;

[0041] Figure 7 It is Figure 6 a cross-sectional view taken along the B-B cutting plane in

[0042] Figure 8 It is a schematic diagram of the paper height difference.

[0043] Main reference numeral description:

[0044] Paper feed roller 1; rotating shaft 11; special-shaped roller 12; first surface 121; second surface 122; wheel body 2; paper separating part 3; first paper separating part 31; second paper separating part 32; first biasing member 4; machine body 5; main body 51; paper storage bin 511; paper feed channel 512; elastic piece 52; flexible part 521; paper lifting plate 6; second biasing member 7; Detailed implementation manners

[0045] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are the preferred embodiments of the present utility model and should not be regarded as excluding other embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

[0046] In the claims, description and above-mentioned drawings of the present utility model, unless otherwise clearly defined, when using terms such as "first", "second" or "third", etc., they are used to distinguish different objects rather than to describe a specific order.

[0047] In the claims, description and above-mentioned drawings of the present utility model, unless otherwise clearly defined, for orientation terms, when using terms such as "center", "lateral", "longitudinal", "horizontal", "vertical", "top", "bottom", "inner", "outer", "upper", "lower", "front", "rear", "left", "right", "clockwise", "counterclockwise", etc. to indicate the orientation or position relationship, it is based on the orientation and position relationship shown in the drawings, and it is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, so it cannot be understood as limiting the specific protection scope of the present invention.

[0048] In the claims, description and above-mentioned drawings of the present utility model, unless otherwise clearly defined, when using the term "fixed connection" or "fixedly connected", it should be understood in a broad sense, that is, any connection method without displacement relationship and relative rotation relationship between the two, that is, including non-detachable fixed connection, detachable fixed connection, being integrated as one body, and being fixedly connected through other devices or elements.

[0049] In the claims, description and above-mentioned drawings of the present utility model, when using terms such as "comprising", "having" and their variants, the intention is "including but not limited to".

[0050] Reference Figures 1-7 A printer includes a paper separating mechanism, a machine body 5, a paper lifting plate 6, and a second biasing member 7.

[0051] Reference Figures 2-4 , the machine body 5 includes a main body 51 and a spring piece 52. The main body 51 is provided with a paper storage bin 511 and a paper feeding channel 512, and the paper storage bin 511 stores papers. The spring piece 52 is installed on the main body 51 and has a flexible portion 521. The flexible portion 521 is located between the paper storage bin 511 and the paper separating mechanism, that is, between the paper storage bin 511 and the paper feeding channel 512. Among them, the paper feeding channel 512 is located at the rear side of the flexible portion 521, and the flexible portion 521 is adapted to block papers from entering the paper feeding channel 512 in the natural state. In this embodiment, the spring piece 52 is an iron sheet, and the iron sheet is located at the bottom of the paper storage bin 511. In other embodiments, the flexible portion 521 can also be formed by other flexible members, such as rubber, etc. The spring piece 52 can also be fixed to the main body 51 by means of screws, etc.

[0052] The paper separating mechanism is adapted to be installed on the machine body 5. The paper separating mechanism includes a paper feeding roller 1, a wheel body 2, a paper separating member 3, and a first biasing member 4.

[0053] Reference Figures 5-7 The paper feed roller 1 is adapted to rotate relative to the machine body 5 and is used to convey the paper at the paper storage bin 511 into the paper feed channel 512 for printing. The paper feed roller 1 includes a rotating shaft 11 and a special-shaped roller 12 fixedly connected to the rotating shaft 11. The rotating shaft 11 is adapted to be rotatably connected to the machine body 5 so that the special-shaped roller 12 rotates. The special-shaped roller 12 includes a connected first surface 121 and a second surface 122. The first surface 121 and the second surface 122 are generally D-shaped. The diameter of the first surface 121 is greater than the diameter of the second surface 122. The first surface 121 has the maximum diameter of the special-shaped roller 12, and the second surface 122 has the minimum diameter of the special-shaped roller 12. In this embodiment, the diameters of all parts of the first surface 121 are equal, and the diameter of the second surface 122 is unequal, and the minimum diameter is located in the middle of the second surface 122. The special-shaped roller 12 is adapted to abut against the flexible part 521 to deform the flexible part 521 (mainly achieved by the contact between the first surface 121 and the flexible part 521), and convey the paper under the clamping of the special-shaped roller 12 and the flexible part 521. The special-shaped roller 12 is adapted to be disengaged from abutting against the flexible part 521 (at this time, the second surface 122 faces the flexible part 521 and has a gap with the flexible part 521 to enable it to recover), so that the flexible part 521 returns to its natural state. The height of the flexible part 521 in its natural state is greater than the height of the paper in the paper storage bin 511.

[0054] The number of the wheel bodies 2 is two. The wheel bodies 2 are sleeved on the rotating shaft 11 and are located at both ends of the paper feed roller 1, and the wheel bodies 2 are coaxial with the rotating shaft 11 and are rotatably connected to the rotating shaft 11; in other embodiments, the wheel bodies 2 can be fixedly connected to the rotating shaft 11. The diameter of the wheel bodies 2 is less than or equal to the maximum diameter of the special-shaped roller 12 and is greater than the minimum diameter of the special-shaped roller 12, so that when in the non-working state (i.e., not feeding paper for printing), the wheel bodies 2 abut against the paper separating member 3, so that there is a gap between the paper feed roller 1 (the special-shaped roller 12) and the paper separating member 3. When in the working state, the paper feed roller 1 abuts against the paper separating member 3 to perform the paper feeding action. At this time, there is a gap between the wheel bodies 2 and the paper separating member 3. The flexible part 521 is arranged to avoid the wheel bodies 2. Preferably, the flexible part 521 has a gap with the wheel bodies 2 in the vertical direction, or the flexible part 521 is located between the two wheel bodies 2.

[0055] The paper separating member 3 is used to cooperate with the special-shaped roller 12 or the wheel bodies 2 to convey the paper. The paper separating member 3 is provided with a first paper separating part 31 and a second paper separating part 32. The first paper separating part 31 corresponds to the special-shaped roller 12, and the second paper separating part 32 corresponds to the wheel bodies 2, so that the first paper separating part 31 is adapted to cooperate with the special-shaped roller 12, and the second paper separating part 32 is adapted to cooperate with the wheel bodies 2. And when the special-shaped roller 12 abuts against the first paper separating part 31, there is a space between the wheel bodies 2 and the second paper separating part 32; when the wheel bodies 2 abut against the second paper separating part 32, there is a space between the special-shaped roller 12 and the first paper separating part 31;

[0056] The hardness of the first paper separation portion 31 is less than that of the second paper separation portion 32, and the friction coefficient of the first paper separation portion 31 is greater than that of the second paper separation portion 32. In this embodiment, the second paper separation portion 32 also corresponds to the shaped roller 12, that is, the second paper separation portion 32 also extends to contact the shaped roller 12, so that the paper forms a height difference when the shaped roller 12 and the paper separation member 3 cooperate. Figure 8 shown.

[0057] The two ends of the first biasing member 4 act on the paper separation member 3 and the machine body 5 respectively, so that the paper separation member 3 moves toward the wheel body 2, so that the first paper separation portion 31 is suitable for abutting against the special-shaped roller 12, and the second paper separation portion 32 is suitable for abutting against the wheel body 2.

[0058] refer to Figure 3 The lifting paper board 6 is placed in the paper storage bin 511 and is suitable for supporting paper. The two ends of the second biasing member 7 act on the lifting paper board 6 and the body 5 (the bottom of the paper storage bin 511) respectively, so that the uppermost layer of paper on the lifting paper board 6 abuts against the wheel body 2 or the special-shaped roller 12. Specifically, when the printer is not working, the uppermost layer of paper abuts against the wheel body 2, and when the printer is working, the uppermost layer of paper abuts against the special-shaped roller 12.

[0059] Working principle: When not in operation, the second surface 122 faces the first paper separation portion 31, and there is a gap between the first paper separation portion 31 and the flexible portion 521. Under the action of the first biasing member 4, the wheel body 2 abuts against the second paper separation portion 32; the top layer of paper abuts against the wheel body 2 under the action of the second biasing member 7, and the flexible portion 521 is in a natural state at this time to block the paper in the paper storage bin 511.

[0060] The rotating shaft 11 and the pickup roller 1 rotate, and the first surface 121 contacts the topmost paper to perform the paper picking action. The first surface 121 also contacts the flexible portion 521 to deform the flexible portion 521. Under the clamping of the flexible portion 521 and the pickup roller 1, the topmost paper gradually enters the paper feeding channel 512. Under the action of the first biasing member 4, the pickup roller 1 cooperates with the first paper separation portion 31 to feed the paper. After the paper picking is completed, the rotating shaft 11 stops rotating. At this time, there is a gap between the pickup roller 1 and the paper separation portion 3. Under the action of the first biasing member 4, the wheel body 2 cooperates with the second paper separation portion 32. When the rear conveying roller transmits the paper, the wheel body 2 will rotate relative to the rotating shaft 11 due to the friction with the paper until the paper is separated from the wheel body 2 and restored to the non-working state, waiting for the next printing.

[0061] Compared with the prior art, this embodiment has the following beneficial effects:

[0062] In an exemplary embodiment, a sheet separating mechanism is adapted to be installed on the body 5 of a printer, and includes a paper feed roller 1, a wheel body 2, a sheet separating member 3, and a first biasing member 4. The paper feed roller 1 includes a rotating shaft 11 and a special-shaped roller 12 fixedly connected to the rotating shaft 11. The rotating shaft 11 is adapted to be rotatably connected to the body 5 to drive the special-shaped roller 12 to rotate. When the special-shaped roller 12 rotates, it is adapted to switch between a working state and a non-working state. In the working state, paper feeding is achieved. The wheel body 2 is coaxial with the rotating shaft 11, and the wheel body 2 is used to prevent the sheet separating member 3 from contacting the special-shaped roller 12 in the non-working state. The sheet separating member 3 is provided with a first sheet separating portion 31 and a second sheet separating portion 32. The first sheet separating portion 31 corresponds to the special-shaped roller 12, and the second sheet separating portion 32 corresponds to the wheel body 2; and when the special-shaped roller 12 abuts against the first sheet separating portion 31, there is a gap between the wheel body 2 and the second sheet separating portion 32; when the wheel body 2 abuts against the second sheet separating portion 32, there is a gap between the special-shaped roller 12 and the first sheet separating portion 31, so as to realize the state switching of the special-shaped roller 12; both ends of the first biasing member 4 act on the sheet separating member 3 and the body 5 respectively, so that the sheet separating member 3 moves in the direction towards the wheel body 2, so that the first sheet separating portion 31 is adapted to abut against the special-shaped roller 12, and the second sheet separating portion 32 is adapted to abut against the wheel body 2, so as to maintain the sheet separating function of the sheet separating member 3.

[0063] The hardness of the first sheet separating portion 31 is less than that of the second sheet separating portion 32. Since the first sheet separating portion 31 has a small hardness, its frictional force is large, so as to ensure the paper feeding effect of the special-shaped roller 12. Under the action of the first biasing member 4, the second sheet separating portion 32 will be in long-term contact with the second sheet separating portion 32 in the non-working state. Since the second sheet separating portion 32 has a large hardness, it is not easy to produce permanent yield deformation, and the second sheet separating portion 32 will not form pits, so as not to affect the size of the paper inlet.

[0064] In an exemplary embodiment, after the special-shaped roller 12 finishes paper feeding, the subsequent paper will be transmitted between the wheel body 2 and the second sheet separating portion 32. Since the friction coefficient of the second sheet separating portion 32 is smaller, the transmission resistance of the subsequent paper is smaller, the transmission load is small, it is less likely to slip, and the paper can be fed normally.

[0065] In an exemplary embodiment, when not working, the force of the first biasing member 4 will be conducted to the special-shaped roller 12 and the rotating shaft 11 through the wheel body 2. If the wheel body 2 is only located at one end of the special-shaped roller 12, the force received by the rotating shaft 11 will be uneven. By making the wheel body 2 located on both sides of the special-shaped roller 12, the force received by the rotating shaft 11 is more uniform.

[0066] In an exemplary embodiment, the wheel body 2 is rotatably connected or fixedly connected to the rotating shaft 11 to achieve assembly. If the wheel body 2 is rotatably connected to the rotating shaft 11, during the subsequent paper conveying process, due to the force of the paper on the wheel body 2, the wheel body 2 rotates. Compared with the fixed connection method, the subsequent transmission frictional force is smaller.

[0067] In an exemplary embodiment, the second sheet separating part 32 also corresponds to the special-shaped roller 12. Since the hardness of the first sheet separating part 31 and the second sheet separating part 32 is inconsistent, when contacting the special-shaped roller 12, a height difference will be generated due to different deformation amounts, and the shape of the paper will be correspondingly sunken, and the contact area between the paper and the sheet separating member 3 becomes larger, so that the resistance received by the second sheet is greater, preventing two sheets from being conveyed simultaneously.

[0068] In an exemplary embodiment, a printer includes a machine body 5 and a sheet separating mechanism as described above, and has the beneficial effects brought by the above sheet separating mechanism.

[0069] In an exemplary embodiment, both ends of the second biasing member 7 act on the paper lifting plate 6 and the machine body 5 respectively, so that the uppermost sheet of paper on the paper lifting plate 6 abuts against the wheel body 2 or the special-shaped roller 12, so as to be suitable for being rubbed by the special-shaped roller 12. The paper lifting plate 6 is suitable for supporting the paper and balancing the force of the second biasing member 7 to prevent the paper from being sunken due to local pressure.

[0070] In an exemplary embodiment, the machine body 5 is provided with a paper storage bin 511 and a flexible part 521. The paper storage bin 511 stores paper. The flexible part 521 is located between the paper storage bin 511 and the sheet separating mechanism. The special-shaped roller 12 is suitable for abutting against the flexible part 521 to deform the flexible part 521, and the paper is conveyed under the clamping of the special-shaped roller 12 and the flexible part 521. When rubbing the paper, the flexible part 521 will bend in the paper feeding direction under the drive of the special-shaped roller 12. Since the first sheet directly contacts the special-shaped roller 12 and has a large frictional force, it can enter the sheet separating mechanism under the clamping of the special-shaped roller 12 and the flexible part 521, and stable paper feeding can be realized. In this way, the reliability of paper feeding can be increased, and as few as two sheets of paper can enter the paper feeding channel 512.

[0071] In an exemplary embodiment, the special-shaped roller 12 is suitable for disengaging from abutting against the flexible part 521 to enable the flexible part 521 to return to its natural state. The height of the flexible part 521 in its natural state is greater than the height of the paper in the paper storage bin 511. In the non-working state, it can block the paper at the paper storage bin 511 from entering the sheet separating mechanism; after the paper rubbing is completed, it rebounds to the natural state and can also push the subsequent paper adhered to the first sheet back into the paper storage bin 511. The flexible part 521 is arranged to avoid the wheel body 2 to ensure that the flexible part 521 can be deformed only when the special-shaped roller 12 rotates.

[0072] In an exemplary embodiment, the flexible part 521 has a gap from the wheel body 2 in the vertical direction, or the flexible part 521 is located between two wheel bodies 2, so as to achieve avoidance.

[0073] Embodiment 2

[0074] Different from the first embodiment, in this embodiment, the second paper separating part 32 may not correspond to the special-shaped roller 12. The paper separating member 3 is further provided with a third paper separating part which corresponds to the special-shaped roller 12. The hardness of the first paper separating part 31 is less than that of the third paper separating part, and the effect of preventing two sheets of paper from being conveyed can also be achieved. The third paper separating part is connected to or spaced from the second paper separating part 32, and the two may be made of the same or different materials.

[0075] The above description of the specification and embodiments is used to explain the protection scope of the present invention, but does not constitute a limitation on the protection scope of the present invention. Through the inspiration of the present invention or the above embodiments, those of ordinary skill in the art, combining common general knowledge, ordinary technical knowledge in the art and / or existing technologies, can make modifications, equivalent replacements or other improvements to the embodiments of the present invention or some of its technical features through logical analysis, reasoning or limited experiments, and all of them should be included in the protection scope of the present invention.

Claims

1. A sheet separating mechanism, which is suitable for being installed on the body (5) of a printer, and is characterized in that: including a paper feeding roller (1), which includes a rotating shaft (11) and a special-shaped roller (12) fixedly connected to the rotating shaft (11), and the rotating shaft (11) is adapted to be rotatably connected to the machine body (5), a wheel body (2), which is coaxial with the rotating shaft (11); a paper separating member (3), which is provided with a first paper separating portion (31) and a second paper separating portion (32), the first paper separating portion (31) corresponds to the special-shaped roller (12), the second paper separating portion (32) corresponds to the wheel body (2), and the hardness of the first paper separating portion (31) is less than the hardness of the second paper separating portion (32); and when the special-shaped roller (12) abuts against the first paper separating portion (31), there is a gap between the wheel body (2) and the second paper separating portion (32); when the wheel body (2) abuts against the second paper separating portion (32), there is a gap between the special-shaped roller (12) and the first paper separating portion (31); a first biasing member (4), the two ends of which respectively act on the paper separating member (3) and the machine body (5) to make the paper separating member (3) move in the direction towards the wheel body (2) so that the first paper separating portion (31) is adapted to abut against the special-shaped roller (12), and the second paper separating portion (32) is adapted to abut against the wheel body (2).

2. The sheet separating mechanism according to claim 1, characterized in that: The friction coefficient of the first paper separating portion (31) is greater than the friction coefficient of the second paper separating portion (32).

3. A sheet separating mechanism according to claim 1, characterized in that: The wheel body (2) is located on both sides of the special-shaped roller (12).

4. A sheet separating mechanism according to any one of claims 1-3, characterized in that: The wheel body (2) is rotatably connected or fixedly connected to the rotating shaft (11).

5. The sheet separating mechanism according to claim 1, characterized in that: The second paper separating portion (32) also corresponds to the special-shaped roller (12), or the paper separating member (3) is further provided with a third paper separating portion, the third paper separating portion corresponds to the special-shaped roller (12), and the hardness of the first paper separating portion (31) is less than the hardness of the third paper separating portion.

6. A printer, characterized in that: including a machine body (5) and a paper separating mechanism according to any one of claims 1-5.

7. A printer according to claim 6, characterized in that: It further includes a paper lifting plate (6) and a second biasing member (7), the paper lifting plate (6) is adapted to support the paper, and the two ends of the second biasing member (7) respectively act on the paper lifting plate (6) and the machine body (5) to make the uppermost paper on the paper lifting plate (6) abut against the wheel body (2) or the special-shaped roller (12).

8. A printer according to claim 6 or 7, characterized in that: The machine body (5) is provided with a paper storage bin (511) and a flexible portion (521), the paper storage bin (511) stores paper, the flexible portion (521) is located between the paper storage bin (511) and the paper separating mechanism, and the special-shaped roller (12) is adapted to abut against the flexible portion (521) to deform the flexible portion (521), and the paper is conveyed under the clamping of the special-shaped roller (12) and the flexible portion (521).

9. A printer according to claim 8, characterized in that: The special-shaped roller (12) is adapted to be disengaged from abutting against the flexible portion (521) so that the flexible portion (521) returns to its natural state, the height of the flexible portion (521) in its natural state is greater than the height of the paper in the paper storage bin (511), and the flexible portion (521) is arranged to avoid the wheel body (2).

10. A printer according to claim 9, characterized in that: There is a gap between the flexible part (521) and the wheel body (2) in the vertical direction, or the flexible part (521) is located between the two wheel bodies (2).

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