A paper feed assembly and printer

Abstract

This utility model provides a paper feeding assembly and a printer, belonging to the field of printer technology. The paper feeding assembly includes a first frame, a paper stop, a locking member, and a second frame. The paper stop is rotatably connected to the first frame and has a stop portion and a paper-blocking portion, with a first position located between the stop portion and the paper-blocking portion. The locking member is rotatably connected to the first frame and has a locking portion and an operating portion. The second frame has a driving portion and is coaxially arranged with the first frame. During the rotation of the second frame, the driving portion moves with the second frame from an initial position close to the first frame to a paper-pickup position away from the first frame. During the movement of the driving portion, it drives the operating portion to rotate around the second position. In the initial position, the locking portion locks the stop portion, so that the paper-blocking portion is limited to the paper-blocking state. In the paper-pickup position, the locking portion separates from the stop portion, so that the paper-blocking portion is in a free-rotating state. The paper feeding assembly of this utility model has a relatively simple and practical structure.

Description

Technical Field

[0001] This utility model relates to the field of printer technology, and in particular to a paper feed assembly and a printer. Background Technology

[0002] The paper feed assembly picks up the printing media from the printer's paper tray or paper feed plate. The picked-up media passes through the paper separation mechanism, and only one sheet of media can enter the paper path inside the printer at a time. Multiple sheets of media entering the printer's paper path simultaneously can easily cause paper jams.

[0003] In practical printer applications, it is essential to ensure that media not picked up by the paper feed assembly remains outside the printer's paper path, and that media not picked up by the paper feed assembly is not accidentally forced into the paper path by external forces, causing paper jams and other malfunctions. In related technologies, the structure of the paper feed assembly is relatively complex. Utility Model Content

[0004] This invention provides a paper feeding assembly and a printer, the purpose of which is to reduce the structural complexity of the paper feeding assembly.

[0005] To achieve the above objectives, this utility model provides a paper feeding assembly, comprising:

[0006] First framework;

[0007] A paper stop is rotatably connected to the first frame at a first position. The paper stop has a stop portion and a paper stop portion. The first position is located between the stop portion and the paper stop portion along the extending direction of the paper stop.

[0008] A locking member is rotatably connected to the first frame at a second position. The locking member has a locking part and an operating part. The second position is located between the locking part and the operating part along the extending direction of the locking member.

[0009] The second frame has a driving part. The second frame is coaxially arranged with the first frame. During the rotation of the second frame, the driving part moves with the second frame from an initial position close to the first frame to a paper-picking position away from the first frame. During the movement of the driving part, the operating part is driven to rotate around the second position. In the initial position, the locking part locks the stop part so that the paper-blocking part is limited to the paper-blocking state. In the paper-picking position, the locking part separates from the stop part so that the paper-blocking part is in a free rotation state.

[0010] In one embodiment, the driving part abuts against the upper surface of the operating part in the vertical direction, and the weight of the locking part is greater than that of the operating part, so that when the driving part is in the initial position, the operating part can remain in contact with the driving part.

[0011] In one embodiment, the weight of the paper stop portion is greater than the weight of the stop portion.

[0012] In one embodiment, the paper stop has a first protrusion and a second protrusion, both of which are located in the stop portion. The first protrusion and the second protrusion enclose a first locking space. The locking member has a third protrusion located in the locking portion. When the driving portion is in the initial position, the third protrusion is inserted into the first locking space to make the paper stop in the paper-stopping state. When the driving portion is in the paper-picking position, the third protrusion is located outside the first locking space to make the paper stop in the free-rotation state.

[0013] In one embodiment, the locking member has a fourth protrusion located in the locking portion. The third protrusion and the fourth protrusion enclose a second locking space. When the driving portion is in the initial position, the second protrusion is inserted into the second locking space to make the paper stop portion in the paper stop state. When the driving portion is in the paper pick-up position, the second protrusion is located outside the second locking space to make the paper stop portion in the free rotation state.

[0014] In one embodiment, the surface of the fourth protrusion near the third protrusion is configured as an arc surface so that when the drive unit is in the initial position, the paper stop can rotate in a direction opposite to the rotation direction of the paper stop during paper feeding.

[0015] In one embodiment, the paper feeding assembly includes a first elastic element, the two ends of which are connected to the first frame and the second frame respectively along their own extension direction. When the driving part moves from the paper picking position to the initial position, the elastic restoring force of the elastic element gradually decreases.

[0016] In one embodiment, the rotation axis of the second frame extends in a first direction, and the second frame has the driving part on both sides of the first direction. The first frame is rotatably connected to the paper stop and the locking part on both sides of the first direction.

[0017] The second aspect of this utility model provides a printer, comprising:

[0018] The paper feed assembly described in any of the above embodiments;

[0019] Mounting plate, connected to the paper feed assembly;

[0020] The printing body is connected to the paper feed assembly via the mounting plate.

[0021] In one embodiment, the printer includes a U-shaped spring and a second elastic member. The U-shaped spring is connected to the printing body, a first end of the second elastic member along its own extension direction is connected to the printing body, a second end of the second elastic member contacts one side of the U-shaped spring, and the mounting plate abuts against the other side of the U-shaped spring.

[0022] The above-mentioned solution of this utility model has the following beneficial effects:

[0023] In this embodiment, the second frame serves as the main structure of the paper feeding assembly. Driving the second frame to rotate relative to the first frame allows for the locking and unlocking of the paper stop via a locking mechanism. The transmission path is relatively simple and easy to implement. By utilizing the necessary rotation of the second frame relative to the first frame to lock and unlock the paper stop, no additional control device is needed, simplifying the structure of the paper feeding assembly and reducing its production cost.

[0024] Other beneficial effects of this invention will be described in detail in the following detailed description section. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the paper feeding assembly in one embodiment of the present invention. The first frame is not shown in the figure, and the driving part is in the initial position.

[0026] Figure 2 for Figure 1 Enlarged structural diagram at point A;

[0027] Figure 3 This is a schematic diagram of the paper feeding assembly in one embodiment of the present invention. The first frame is not shown in the figure, and the driving part is in the paper picking position.

[0028] Figure 4 This is a schematic diagram of the paper feeding assembly in one embodiment of the present invention;

[0029] Figure 5 This is a partial structural diagram of the printer in one embodiment of the present invention;

[0030] Figure 6 for Figure 5 Enlarged structural diagram at point B;

[0031] Figure 7 This is a partial structural diagram of the printer in one embodiment of the present invention;

[0032] Figure 8 This is a schematic diagram of the printer structure in one embodiment of the present invention.

[0033] [Explanation of Labels in the Attached Image]

[0034] 100. Printer; 10. Paper feed assembly; 1. First frame; 1a. First position; 2a. Second position; 2. Paper stop; 21. Stop; 22. Paper stop; 23. First protrusion; 24. Second protrusion; 234. First locking space; 3. Locking element; 31. Locking part; 32. Operating part; 33. Third protrusion; 34. Fourth protrusion; 341. First surface; 334. Second locking space; 4. Second frame; 41. Drive unit; 5. First elastic element; 6. Paper feed roller assembly; 20. Mounting plate; 30. Printer body; 40. U-shaped spring; 50. Second elastic element. Detailed Implementation

[0035] To make the technical problems, solutions, and advantages of this utility model clearer, a detailed description will be provided below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model. Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0036] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0037] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a locking connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0038] The first aspect of this application provides a paper feeding assembly 10 for feeding paper into a printer 100. Specifically, please refer to... Figures 1-4The paper feeding assembly 10 includes a first frame 1, a paper stop 2, a locking member 3, and a second frame 4.

[0039] The material of the first frame 1 can be a material with a certain hardness and strength, such as metal or plastic.

[0040] As a component that comes into direct contact with the media, the paper stop 2 allows the media to pass through during paper feeding and blocks the media from entering the paper path of the printer 100 when paper feeding is not required. The paper stop 2 can be made of a material with a certain degree of hardness and strength, such as metal or plastic.

[0041] The paper stop 2 is rotatably connected to the first frame 1 at a first position 1a. The paper stop 2 has a stop portion 21 and a paper stop portion 22. The first position 1a is located between the stop portion 21 and the paper stop portion 22 along the extending direction of the paper stop 2, making the structure of the paper stop 2 similar to a seesaw structure. For example, when the paper stop 2 rotates around the first position 1a, if the stop portion 21 moves upward relative to the first position 1a, the paper stop portion 22 moves downward relative to the first position 1a; if the stop portion 21 moves downward relative to the first position 1a, the paper stop portion 22 moves upward relative to the first position 1a. The locking member 3, as a component capable of locking the paper stop 2, is rotatably connected to the first frame 1 at a second position 2a. The locking member 3 can be made of a material with a certain hardness and strength, such as metal or plastic. The locking member 3 has a locking portion 31 and an operating portion 32. The second position 2a is located between the locking portion 31 and the operating portion 32 along the extending direction of the locking member 3, making the structure of the locking member 3 similar to a seesaw structure. For example, when the locking member 3 rotates around the second position 2a, if the operating portion 32 moves downward relative to the second position 2a, the locking portion 31 can move upward relative to the second position 2a; conversely, if the operating portion 32 moves upward relative to the second position 2a, the locking portion 31 can move downward relative to the second position 2a.

[0042] The second frame 4 has a drive unit 41. For example, the drive unit 41 protrudes from the main body surface of the second frame 4 in a direction perpendicular to the paper feed direction. The second frame 4 is coaxially arranged with the first frame 1, and the second frame 4 is rotatable relative to the first frame 1. Figure 4 As shown, the second frame 4 is located below the first frame 1. During the rotation of the second frame 4 relative to the first frame 1, the protruding drive part 41 can move from an initial position close to the first frame 1 to a paper pickup position away from the first frame 1. The drive part 41 abuts against the operating part 32, and during the movement of the drive part 41, it can drive the operating part 32 to rotate around the second position 2a.

[0043] When the drive unit 41 is in its initial position close to the first frame 1, the operating unit 32 abuts against the drive unit 41, and is in a position close to the first frame 1. At this time, the locking part 31 and the stop part 21 lock together, locking the paper stop 2. The paper stop 2 cannot rotate relative to the first frame 1, and the paper stop 22 is confined to the paper stop state. When the drive unit 41 is in a paper pickup position away from the first frame 1, the operating unit 32 is also in a position away from the first frame 1. The locking part 31 and the stop part 21 separate, unlocking the paper stop 2. The paper stop 2 can rotate relative to the first frame 1, so that the paper stop 22 is in a free rotation state, thereby allowing the paper feed assembly 10 to allow the medium to pass through.

[0044] For example, please refer to Figures 1-4 The paper feed assembly 10 also includes a paper feed roller assembly 6, which is disposed within the second frame 4 and configured to drive the media into the paper path of the printer 100. When the drive unit 41 of the second frame 4 is in its initial position, the paper feed roller assembly 6 of the paper feed assembly 10 maintains a considerable distance from the media. The operating part 32 of the locking member 3 is positioned close to the first frame 1 along with the drive unit 41, and the locking part 31 engages with the stop part 21 of the paper stop member 2 to lock the paper stop member 2, reducing the possibility of the media entering the paper path of the printer 100 under external force. When the second frame 4 rotates relative to the first frame 1 in the direction toward the media, the drive unit 41 of the second frame 4 gradually moves to the paper pickup position, and the paper feed roller assembly 6 moves toward the media along with the rotation of the second frame 4 until it contacts the media and drives the media to move toward the paper path of the printer 100.

[0045] As the drive unit 41 moves from its initial position to the paper pickup position, the operating unit 32 moves towards the medium along with the drive unit 41, and the locking part 31 moves away from the medium, causing the locking part 31 to separate from the stop part 21, thereby allowing the paper stop 2 to rotate freely. During the process of the medium entering the paper path of the printer 100, driven by the paper feed roller assembly 6, the paper stop part 22 of the freely rotating paper stop 2 can be pushed open, allowing the medium to be printed to smoothly enter the paper path of the printer 100.

[0046] In this embodiment, the second frame 4 serves as the main structure of the paper feeding assembly 10. Driving the second frame 4 to rotate relative to the first frame 1 allows for the locking and unlocking of the paper stop 2 via the locking member 3. The transmission path is relatively simple and easy to implement. By utilizing the necessary rotation of the second frame 4 relative to the first frame 1 to achieve the locking and unlocking of the paper stop 2, no additional control device for locking and unlocking the paper stop 2 is required. This simplifies the structure of the paper feeding assembly 10 and also helps reduce its production cost.

[0047] In one embodiment, please refer to Figure 1 and Figure 2 The drive unit 41 abuts against the upper vertical surface of the operating unit 32. As the drive unit 41 moves from its initial position to the paper-picking position, it presses down on the operating unit 32, causing it to rotate towards the medium, thereby unlocking the locking part 31 and the stop part 21, thus positioning the paper stop 2 as described above. Figure 3 The state of free rotation is shown.

[0048] In some embodiments, the weight of the locking part 31 is greater than the weight of the operating part 32. During the process of the driving part 41 moving from the picking position to the initial position, the operating part 32 can automatically follow the driving part 41 under the action of the gravity of the locking part 31 and move away from the medium until the locking part 31 locks the paper stop 2.

[0049] In some embodiments, the weight of the paper stop 22 is greater than the weight of the stop 21, such as... Figure 4 As shown, when the locking part 31 is unlocked and the stop part 21 is released, the paper stop 2 is in a state of free rotation. However, since the stop part 21 is basically in contact with the first frame 1, the first frame 1 will limit its range of rotation (to face the first frame 1). Figure 1 From the perspective of the paper feed rollers 6, the rotation is counterclockwise, limiting the rotation range of the paper stop 2 and keeping it basically in the position of stopping the medium. When the medium enters the printer 100, it is driven by the paper feed rollers 6 to push the paper stop 2 to rotate (clockwise). Due to the large weight of the paper stop 22, it automatically returns to the position of stopping the medium under its own weight. When the drive unit 41 returns to its initial position, the locking part 31 of the locking member 3 can smoothly lock the stop part 21 of the paper stop 2. In one embodiment, please refer to... Figure 1 and Figure 2 The paper stop 2 has a first protrusion 23 and a second protrusion 24, both of which are located on the stop portion 21. The first protrusion 23 and the second protrusion 24 enclose a first locking space 234. For example, please refer to... Figure 2 Both the first protrusion 23 and the second protrusion 24 protrude upwards. The locking member 3 has a third protrusion 33, which is located in the locking portion 31. For example, please refer to... Figure 2The third protrusion 33 protrudes downwards. When the drive unit 41 is in the initial position, the third protrusion 33 is inserted into the first locking space 234, causing the locking part 31 to lock the stop part 21, so that the paper stop part 22 is in the paper-stopping state. When the drive unit 41 is in the paper-picking position, the third protrusion 33 is outside the first locking space 234, so that the locking part 31 is unlocked from the stop part 21, allowing the paper stop part 22 to rotate freely. Through the relatively simple insertion and cooperation between the third protrusion 33 and the first protrusion 23 and the second protrusion 24, the locking part 31 can lock or unlock the stop part 21, thereby making the structure of the paper feed assembly 10 simpler and more efficient.

[0050] In one embodiment, please refer to Figure 1 and Figure 2 The locking member 3 has a fourth protrusion 34 located in the locking portion 31, and the third protrusion 33 and the fourth protrusion 34 enclose a second locking space 334. For example, please refer to Figure 2 The third protrusion 33 and the fourth protrusion 34 both protrude downwards. When the drive unit 41 is in the initial position, the second protrusion 24 is inserted into the second locking space 334, so that the locking part 31 and the stop part 21 are locked together, so that the paper stop part 22 is in the paper-stopping state. When the drive unit 41 is in the paper-picking position, the second protrusion 24 is outside the second locking space 334, so that the locking part 31 and the stop part 21 are unlocked, so that the paper stop part 22 is in a free-rotating state. Through the relatively simple insertion and cooperation of the first protrusion 23, the second protrusion 24, the third protrusion 33 and the fourth protrusion 34, the locking part 31 and the stop part 21 can be locked or unlocked together, thereby making the structure of the paper feed assembly 10 simpler and more efficient.

[0051] In one embodiment, please refer to Figure 2 The surface of the fourth protrusion 34 near the third protrusion 33 is the first surface 341. The first surface 341 is configured as an arc surface so that when the drive unit 41 is in the initial position, the paper stop 2 can rotate slightly in the opposite direction to the rotation direction of the paper stop 2 during paper feeding. This allows the jammed medium to be pushed more smoothly by the paper stop 22 when the printer 100 jams, and then removed from the printer 100 by removing the jammed medium in the opposite direction to the paper feeding direction. For example, when the printer 100 jams, the printer 100 stops working, and the paper feed assembly 10 will rotate as follows... Figure 1 and Figure 2 The paper-blocking state is shown. The locking part 31 and the stop part 21 are locked together. During the process of removing the jammed media from the printer 100, the jammed media will touch the paper-blocking part 22, causing the stop part 21 to rotate approximately counterclockwise (towards...). Figure 1(From the perspective shown) the rotation trend. Since the first surface 341 is an arc surface, and the curvature of the first surface 341 can be the same as the curvature of the arc formed by the rotation path of the second protrusion 24, the stop part 21 can rotate approximately counterclockwise to remove the medium more smoothly.

[0052] In one embodiment, please refer to Figure 4 The paper feed assembly 10 includes a first elastic element 5. The two ends of the first elastic element 5 along its extension direction are respectively connected to the first frame 1 and the second frame 4. When the drive unit 41 moves from the paper pickup position to the initial position, the elastic restoring force of the elastic element gradually decreases. The first elastic element 5 can be a spring. With the first frame 1 remaining relatively stationary, the second frame 4 can gradually move under the action of the elastic restoring force of the first elastic element 5, allowing the drive unit 41 to automatically move from the paper pickup position to the initial position. This enables the paper feed assembly 10 of this application to maintain a paper-blocking state effectively when the printer 100 is not in operation. For example, when the printer 100 enters the working state, the power assembly of the printer 100 can force the second frame 4 and the paper feed roller assembly 6 disposed on the second frame 4 to press down, so that the paper feed roller assembly 6 can abut the printing medium, and the locking part 31 and the stop part 21 can be unlocked. During this process, the first elastic element 5 is stretched. When the printer 100 exits the working state, the second frame 4 can automatically rotate back to its original position in the opposite direction under the elastic restoring force of the first elastic element 5, so that the paper feed roller group 6 is away from the medium, and the locking part 31 locks the stop part 21 again.

[0053] In one embodiment, the rotation axis of the second frame 4 extends in a first direction. The second frame 4 has driving parts 41 on opposite sides along the first direction. The first frame 1 is rotatably connected to paper-blocking members 2 and locking members 3 on opposite sides along the first direction, so that the two driving parts 41 can drive the corresponding operating parts 32 to move, thereby locking or unlocking the two corresponding paper-blocking members 2 together. The paper-blocking parts 22 of both paper-blocking members 2 can both block or allow the printing medium to enter the printer 100, and also have the function of aligning stacked printing media.

[0054] Please see Figure 5 , Figure 7 and Figure 8 The second aspect of this application provides a printer 100, including the paper feed assembly 10, mounting plate 20 and printing body 30 described in any of the foregoing embodiments. Figure 5 and Figure 7 Only a portion of the printer 100's structure is shown; for example, the printer 100's housing and some structural components are not shown. The connection relationships between the mounting plate 20, the paper feed assembly 10, and the print body 30 are only schematically illustrated.

[0055] Mounting plate 20 is connected to paper feed assembly 10, and is fixed to print body 30, for example, by screws or other means. Print body 30 is connected to paper feed assembly 10 via mounting plate 20. When print body 30 performs a printing task, locking part 31 in paper feed assembly 10 can unlock stop part 21, allowing the printing medium to enter print body 30 for printing. When print body 30 exits printing, locking part 31 in paper feed assembly 10 can lock stop part 21, preventing the medium from entering the interior of print body 30.

[0056] In one embodiment, please refer to Figure 5 and Figure 6 The printer 100 includes a U-shaped spring 40 and a second elastic element 50. The second elastic element 50 can be a spring. The U-shaped spring 40 is connected to the printing body 30, and the first end of the second elastic element 50 along its extension direction is connected to the printing body 30. The second end of the second elastic element 50 contacts one side of the U-shaped spring 40 (either by abutting or by fixing together), and the mounting plate 20 abuts against the other side of the U-shaped spring 40. It should be noted that the paper feed assembly 10 generates static electricity during operation, which can be conducted to the grounding contact in the printing body 30 through the mounting plate 20 and the spring. The U-shaped spring 40 of this application serves as an intermediate component between the second elastic element 50 and the mounting plate 20, allowing the second elastic element 50 and the U-shaped spring 40 to be installed on the printing body 30 first. During the installation of the mounting plate 20, the static electricity is conducted to the grounding contact of the printing body 30 by the contact between the mounting plate 20 and the U-shaped spring 40, which helps to reduce the possibility of the second elastic element 50 jumping out and causing the mounting plate 20 to fail to install.

[0057] It is understood that the printing body 30 may include all structural components and control circuits required for printing, excluding the aforementioned paper feed assembly 10, mounting plate 20, second elastic element 50, and U-shaped spring 40, and cooperates with the paper feed assembly 10 to achieve the printing function. Structural components may include, for example, a transfer assembly, a fixing assembly, a media transport assembly, a developing assembly, and a laser assembly. Control circuits may include, for example, a laser control circuit, a power control circuit, a fixing temperature control circuit, and a motor control circuit. The printing body 30 may adopt the corresponding structure found in existing printers 100, which will not be elaborated upon here.

[0058] It is understood that the paper feed assembly 10 in this application can be used in a printer 100 with only a single printing function, or in a printer 100 with multiple functions such as copying, printing, and scanning; this is not limited to that. For example Figure 8As shown, a printer 100 with copying and scanning functions is shown. The printing part that realizes the printing function can adopt the structure of the paper feed assembly 10, mounting plate 20, U-shaped spring 40 and second elastic element 50 in this application.

[0059] The above are preferred embodiments of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A paper feed assembly characterized by, include: First framework; A paper stop is rotatably connected to the first frame at a first position. The paper stop has a stop portion and a paper stop portion. The first position is located between the stop portion and the paper stop portion along the extending direction of the paper stop. A locking member is rotatably connected to the first frame at a second position. The locking member has a locking part and an operating part. The second position is located between the locking part and the operating part along the extending direction of the locking member. The second frame has a driving part. The second frame is coaxially arranged with the first frame. During the rotation of the second frame, the driving part moves with the second frame from an initial position close to the first frame to a paper-picking position away from the first frame. During the movement of the driving part, the operating part is driven to rotate around the second position. In the initial position, the locking part locks the stop part so that the paper-blocking part is limited to the paper-blocking state. In the paper-picking position, the locking part separates from the stop part so that the paper-blocking part is in a free rotation state.

2. The paper feed assembly of claim 1, wherein, The driving part abuts against the upper surface of the operating part in the vertical direction, and the weight of the locking part is greater than that of the operating part, so that when the driving part is in the initial position, the operating part can remain in contact with the driving part.

3. The paper feed assembly of claim 1, wherein, The weight of the paper-blocking part is greater than the weight of the stop part.

4. The paper feeding assembly according to claim 1, characterized in that, The paper stop has a first protrusion and a second protrusion, both of which are located in the stop portion. The first protrusion and the second protrusion enclose a first locking space. The locking member has a third protrusion located in the locking portion. When the driving portion is in the initial position, the third protrusion is inserted into the first locking space to make the paper stop in the paper-stopping state. When the driving portion is in the paper-picking position, the third protrusion is outside the first locking space to make the paper stop in the free-rotation state.

5. The paper feeding assembly according to claim 4, characterized in that, The locking member has a fourth protrusion located in the locking portion. The third protrusion and the fourth protrusion enclose a second locking space. When the driving portion is in the initial position, the second protrusion is inserted into the second locking space to make the paper stop portion in the paper stop state. When the driving portion is in the paper pick-up position, the second protrusion is located outside the second locking space to make the paper stop portion in the free rotation state.

6. The paper feed assembly according to claim 5, characterized in that, The surface of the fourth protrusion near the third protrusion is a first surface, which is configured as an arc surface so that when the driving part is in the initial position, the paper stop can rotate in a direction opposite to the rotation direction of the paper stop when feeding paper.

7. The paper feeding assembly according to claim 1, characterized in that, The paper feeding assembly includes a first elastic element, the two ends of which are connected to the first frame and the second frame respectively along their extension direction. When the drive unit moves from the paper picking position to the initial position, the elastic restoring force of the elastic element gradually decreases.

8. The paper feed assembly according to claim 1, characterized in that, The rotation axis of the second frame extends in the first direction, and the second frame has the driving part on both sides of the first direction. The first frame is rotatably connected to the paper stop and the locking part on both sides of the first direction.

9. A printer, characterized in that, include: The paper feed assembly according to any one of claims 1 to 8; Mounting plate, connected to the paper feed assembly; The printing body is connected to the paper feed assembly via the mounting plate.

10. The printer according to claim 9, characterized in that, The printer includes a U-shaped spring and a second elastic element. The U-shaped spring is connected to the printing body. The first end of the second elastic element along its own extension direction is connected to the printing body. The second end of the second elastic element contacts one side of the U-shaped spring. The mounting plate abuts against the other side of the U-shaped spring.

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