Printer with novel paper width adjusting structure

Abstract

The utility model discloses a printer with a novel paper width adjusting structure, and relates to the technical field of printers, according to the printer with the novel paper width adjusting structure, a fixing part on a clamping plate is shifted to enable an elastic part to deform until a supporting roller filled with printing paper can normally penetrate through a through hole, and then the fixing part is loosened to enable the supporting roller to pass through the through hole. And then the two clamping plates are pushed to move close to the printing paper in the direction of the central axis of the supporting roller, and the fixing parts slide along the outer surface of the supporting roller till the two clamping plates are attached to the two ends of the printing paper, so that the printing paper is fixed. Compared with an existing structure, the paper width adjusting structure is simple in structure, convenient to assemble and rapid in adjustment, when the clamping plates are damaged, the clamping plates can be conveniently and rapidly replaced, and meanwhile it is avoided that a guide groove is formed in the outer surface of the supporting roller.

Description

Technical Field

[0001] The utility model relates to the technical field of printers, in particular to a printer with a novel paper width adjustment structure. Background Art

[0002] The paper bin is one of the components of a printer, mainly used to place and install printing paper. Currently, the printing paper is usually directly placed in the paper bin or supported by a support roller. To prevent the printing paper from shifting on the support roller, a limiting structure is usually provided on the support roller to keep the printing paper stable on the support roller without shifting.

[0003] For example, a paper feeding roller for preventing deviation, disclosed in a Chinese utility model patent on May 3, 2024, with the publication number CN220883821U, can adjust the distance between two annular clamping plates according to the width of the paper through the cooperation between a variable-speed motor, a first gear, a second gear, a bidirectional lead screw, a guide groove, and a moving rod, preventing the paper from shifting during movement and further improving the printing accuracy of the printer.

[0004] However, the paper width adjustment structure of this printer is complex, difficult to assemble and process. When the annular clamping plate is damaged, it cannot be quickly replaced. At the same time, a guide groove is provided on the outer surface of the paper feeding roller, and dust and impurities in the air are likely to fall into the bidirectional lead screw inside the paper feeding roller, thus affecting the normal operation of the bidirectional lead screw. Summary of the Utility Model

[0005] In order to overcome the deficiencies of the prior art, the utility model provides a printer with a novel paper width adjustment structure to solve the problems of the existing paper width adjustment structure being complex, difficult to assemble and process, unable to be quickly replaced when the annular clamping plate is damaged, and dust and impurities in the air being likely to fall into the bidirectional lead screw inside the paper feeding roller, thus affecting the normal operation of the bidirectional lead screw.

[0006] To solve the above technical problems, the utility model provides the following technical solution: A printer with a novel paper width adjustment structure includes a machine body. A paper bin is provided inside the machine body. A support roller is provided inside the paper bin. Two clamping plates are slidably provided on the support roller. Through holes are provided on the clamping plates, and the size of the through holes is larger than the cross-sectional size of the support roller. At least one pressing member is fixed on the inner wall of the through hole. The pressing member includes an elastic part and a fixing part. When the elastic part undergoes elastic deformation, the elastic part generates a rebound force to press and fix the fixing part on the support roller.

[0007] Preferably, the elastic part includes at least one bent elastic sheet. One end of the bent elastic sheet is fixedly connected to the inner wall of the through hole, and the other end of the bent elastic sheet is fixedly connected to the fixing part.

[0008] Preferably, the bent elastic piece is wavy, there are two bent elastic pieces, symmetrically arranged at both ends of the fixing part, and the materials of the elastic part and the fixing part are both rubber.

[0009] Preferably, the elastic part includes at least one straight elastic piece, one end of the straight elastic piece is fixedly connected to the inner wall of the through hole, and the other end of the straight elastic piece is fixedly connected to the fixing part.

[0010] Preferably, there are two pressing members, symmetrically arranged on the inner wall of the through hole. When the elastic part does not undergo elastic deformation, the distance between the two fixing parts is less than the distance between the two surfaces of the support roller that are in contact with the fixing part.

[0011] Preferably, the surface of the fixing part on one clamping plate facing the other clamping plate is set as an inclined surface, the inclined surface faces the support roller, and the maximum distance between the inclined surfaces of the two fixing parts on one clamping plate is not less than the distance between the support roller and the surfaces of the two fixing parts in contact.

[0012] Preferably, support rings are provided on the back sides of both clamping plates, the size of the ring opening of the support ring is adapted to the size of the through hole, and the pressing member extends into the inner wall of the support ring along the central axis direction of the support roller.

[0013] Preferably, the thickness of the elastic part is 0.8 mm - 1.2 mm, the width of the surface of the fixing part in contact with the support roller and the width of the elastic part are both 3 mm - 7 mm, and the length of the surface of the fixing part in contact with the support roller is 1 / 8 - 1 / 6 of the cross-sectional circumference of the support roller.

[0014] Preferably, limiting blocks are symmetrically arranged on the inner walls of the through hole and the inner wall of the support ring, and the limiting blocks are in contact with the outer wall of the support roller.

[0015] Preferably, the surfaces of the support roller in contact with the fixing part are all flat surfaces, and the surfaces of the support roller in contact with the limiting blocks are all arc surfaces.

[0016] Compared with the prior art, the beneficial effects that the present utility model can achieve are:

[0017] The utility model moves the fixing part on the clamping plate to deform the elastic part until the support roller with the printing paper can pass through the through hole normally, and then releases the fixing part, so that the elastic part generates a rebound force to press the fixing part tightly and fix it on the support roller, thereby completing the positioning and fixing of the clamping plate, and then pushing the two clamping plates along the central axis direction of the support roller to move close to the printing paper, and the fixing part slides along the outer surface of the support roller until the two clamping plates are in contact with the two ends of the printing paper, thereby completing the limiting of printing papers of different widths, so that the printing papers are stably placed on the support roller without deviation. Compared with the existing structure, the paper width adjustment structure is simple, easy to assemble, and quick to adjust. When the clamping plate is damaged, it is convenient to quickly replace it. At the same time, it is avoided to provide a guide groove on the outer surface of the support roller, thereby avoiding the existing situation where dust and impurities in the air are easily dropped into the bidirectional screw rod in the paper feeding roller, thereby affecting the normal operation of the bidirectional screw rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the splint, the pressing member and the limit block of the utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the splint, the pressing member, the limit block and the support ring of the utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the pressing member in the first embodiment of the utility model;

[0022] Figure 5 This is a schematic diagram of the structure of the pressing member, the clamping plate and the supporting ring in the second embodiment of the utility model;

[0023] Among them: 1. machine body; 11. paper bin; 2. support roller; 3. clamping plate; 31. through hole; 4. pressing member; 41. elastic part; 42. fixing part; 5. support ring; 6. limit block. DETAILED DESCRIPTION

[0024] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific embodiments. However, the following embodiments are only preferred embodiments of the present invention, not all of them. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work all belong to the protection scope of the present invention. The experimental methods in the following embodiments are conventional methods unless otherwise specified. The materials, reagents, etc. used in the following embodiments are all commercially available unless otherwise specified.

[0025] like Figures 1-4As shown, the utility model provides a printer with a novel paper width adjustment structure, including a machine body 1, a paper bin 11 is arranged in the machine body 1, a support roller 2 is arranged in the paper bin 11 (the support roller 2 is detachably arranged in the paper bin 11, so as to be convenient to take it out and then convenient to carry out subsequent paper replacement), two clamping plates 3 are slidably arranged on the support roller 2, a through hole 31 is opened on the clamping plate 3, the size of the through hole 31 is larger than the cross-sectional size of the support roller 2, at least one pressing member 4 is fixed to the inner wall of the through hole 31, the pressing member 4 includes an elastic part 41 and a fixed part 42, when the elastic part 41 is elastically deformed, the elastic part 41 generates a rebound force to press and fix the fixed part 42 on the support roller 2;

[0026] When it is necessary to place printing paper, the support roller 2 is taken out from the paper bin 11, a clamping plate 3 is taken out from one end of the support roller 2, and then the printing paper (usually a roll of paper) is put on the support roller 2, and then the fixing part 42 on the taken out clamping plate 3 is moved to deform the elastic part 41 until the support roller 2 can pass through the through hole 31 normally, and then the fixing part 42 is released, so that the elastic part 41 generates a rebound force to press the fixing part 42 tightly and fix it on the support roller 2 (at this time, the elastic part 41 is still in an elastic deformation state), thereby completing the positioning and fixing of the clamping plate 3, so that the taken out clamping plate 3 can be reinstalled on On the support roller 2, the printing paper is located between the two clamping plates 3. Then, the two clamping plates 3 are pushed along the central axis direction of the support roller 2 to move close to the printing paper, and the fixing portion 42 slides along the outer surface of the support roller 2 (at this time, the elastic portion 41 generates a rebound force that always acts on the fixing portion 42) until the two clamping plates 3 are attached to the two ends of the printing paper. Under the rebound force of the elastic portion 41, the fixing portion 42 (i.e., the clamping plates 3) will not move at will, thereby completing the position limitation of the printing paper of different widths, so that it is stably located on the support roller 2 without deviation, and finally the support roller 2 is placed in the paper bin 11.

[0027] Compared with the existing structure, the paper width adjustment structure of the present application is simple, easy to assemble, and quick to adjust. When the clamping plate 3 is damaged, it is convenient to quickly replace it. At the same time, it is avoided to open a guide groove on the outer surface of the support roller 2, thereby avoiding the existing dust impurities in the air from easily falling into the bidirectional screw rod in the paper feeding roller, thereby affecting the normal operation of the bidirectional screw rod.

[0028] In addition, when pushing the clamping plate 3 to move on the supporting roller 2, the fixing portion 42 can be moved so that it no longer contacts the supporting roller 2. At this time, the clamping plate 3 can move along the supporting roller 2 more smoothly, but it is relatively strenuous for the human hand to keep moving the fixing portion 42.

[0029] Embodiment 1:

[0030] The elastic portion 41 includes at least one bent elastic piece, one end of the bent elastic piece is fixedly connected to the inner wall of the through hole 31, and the other end of the bent elastic piece is fixedly connected to the fixing portion 42;

[0031] As Figure 2 and Figure 3 shown, it is preferred here that the bent elastic piece is wavy. There are two bent elastic pieces, symmetrically arranged at both ends of the fixing part 42. The materials of the elastic part 41 and the fixing part 42 are both rubber, which is convenient for integrally injection molding;

[0032] By setting the elastic part 41 to be bent (wavy), a larger stroke and elastic deformation can be provided.

[0033] Embodiment 2:

[0034] As Figure 5 shown, the elastic part 41 includes at least one straight elastic piece. One end of the straight elastic piece is fixedly connected to the inner wall of the through hole 31, and the other end of the straight elastic piece is fixedly connected to the fixing part 42;

[0035] By setting the elastic part 41 of the straight elastic piece, although the stroke and elastic deformation are not as good as those of the bent shape, the required material is relatively less than that of the bent shape, and the production cost is relatively low. Specifically, people can choose according to their needs.

[0036] As Figures 2-4 shown, there are two pressing parts 4 here, symmetrically arranged on the inner wall of the through hole 31. Through the symmetrically arranged pressing parts 4, the rebounding forces generated when the two elastic parts 41 undergo elastic deformation can act oppositely on the fixing part 42, so that the fixing of the clamping plate 3 is more stable. When the elastic part 41 does not undergo elastic deformation, the distance between the two fixing parts 42 is less than the distance between the two surfaces of the supporting roller 2 that are in contact with the fixing part 42, ensuring that when the fixing part 42 is in contact with the supporting roller 2, the elastic part 41 undergoes elastic deformation, generating sufficient rebounding force to press and fix the fixing part 42 on the supporting roller 2;

[0037] Specifically, the distance between the two fixing parts 42 is less than the distance between the two surfaces of the supporting roller 2 that are in contact with the fixing part 42 by 0.4 mm - 1.6 mm. Thus, when the elastic part 41 undergoes elastic deformation, the stroke of each fixing part 42 is 0.2 mm - 0.8 mm. When the stroke of each fixing part 42 is greater than 0.8 mm, it is more laborious to push the clamping plate 3 to move on the supporting roller 2 to adjust its position. When the stroke of the fixing part 42 is less than 0.2 mm, the rebounding force generated by the elastic deformation of the elastic part 41 cannot well press and fix the fixing part 42, so that the position of the clamping plate 3 on the supporting roller 2 cannot be well fixed, and it is difficult for the clamping plate 3 to play a good role in limiting and fixing the paper.

[0038] As Figure 1 and Figure 4As shown, the surface of the fixing portion 42 on one clamping plate 3 facing the other clamping plate 3 is set as an inclined surface, the inclined surface faces the supporting roller 2, and the farthest distance between the inclined surfaces of the two fixing portions 42 on one clamping plate 3 is not less than the distance between the surfaces of the supporting roller 2 and the two fixing portions 42 in contact with each other;

[0039] By providing the inclined surface, after placing the paper on the support roller 2, when pushing the clamping plate 3 to move onto the support roller 2, the elastic part 41 can be gradually deformed, avoiding the trouble of manually moving the fixing part 42 and then placing the clamping plate 3.

[0040] like Figure 2 and Figure 3 As shown, the two clamping plates 3 are provided with a support ring 5 on the back side, the ring opening size of the support ring 5 is adapted to the size of the through hole 31, and the pressing member 4 extends into the inner wall of the support ring 5 along the central axis direction of the support roller 2;

[0041] By providing the support ring 5 and extending the pressing member 4 into the inner wall of the support ring 5 , the width of the fixing portion 42 is increased, so that the fixing portion 42 has a better pressing and fixing effect, so that the clamping plate 3 is stably placed on the support roller 2 without sliding.

[0042] Here, the thickness of the elastic part 41 is selected to be 0.8mm-1.2mm, and the width of the elastic part 41 is selected to be 3mm-7mm. When the thickness of the elastic part 41 is greater than 1.2mm or the width is greater than 7mm, the elastic effect of the elastic part 41 will be poor, and it will be more laborious to push the clamping plate 3 to move on the support roller 2. When the thickness of the elastic part 41 is less than 0.8mm or the width is less than 3mm, when pushing the clamping plate 3 to move on the support roller 2, the clamping plate 3 will move a long stroke, and the fixed part 42 will move a short stroke or will not move. At this time, the positions of the clamping plate 3 and the fixed part 42 will deviate relatively, making it difficult to adjust the position of the clamping plate 3 well.

[0043] The width of the contact surface between the fixing portion 42 and the support roller 2 is 3 mm to 7 mm (here the width of the fixing portion 42 and the elastic portion 41 are equal), and the length of the contact surface between the fixing portion 42 and the support roller 2 is 1 / 8 to 1 / 6 of the circumference of the cross section of the support roller 2;

[0044] When the width of the contact surface between the fixing portion 42 and the supporting roller 2 is greater than 7 mm, and the length of the contact surface between the fixing portion 42 and the supporting roller 2 is greater than 1 / 6 of the circumference of the cross section of the supporting roller 2, the weight of the fixing portion 42 is heavy, and the friction between the fixing portion 42 and the supporting roller 2 is large, so it is more laborious to push the clamping plate 3 to move;

[0045] When the width of the fitting surface between the fixing part 42 and the support roller 2 is less than 3 mm and the length of the fitting surface between the fixing part 42 and the support roller 2 is less than 1 / 8 of the cross-sectional circumference of the support roller 2, the area of the fixing part 42 is small at this time. Under the action of the same elastic force of the elastic part 41, the surface pressure of the contact between the fixing part 42 and the support roller 2 is large, and the fixing part 42 is easily damaged.

[0046] As Figure 2 and Figure 3 shown, limiting blocks 6 are symmetrically arranged on the inner walls of the through holes 31 and the inner walls of the support rings 5, and the limiting blocks 6 are in contact with the outer wall of the support roller 2;

[0047] By arranging the limiting blocks 6 in contact with the support roller 2, a certain limiting effect is exerted on the clamping plate 3, so that the clamping plate 3 will not move along the direction perpendicular to the contact surface between the limiting blocks 6 and the support roller 2, and in cooperation with the pressing member 4, the clamping plate 3 can be placed more stably on the support roller 2.

[0048] As Figures 1-3 shown, the surfaces of the support roller 2 in contact with the fixing part 42 are all flat surfaces, and the surfaces of the support roller 2 in contact with the limiting blocks 6 are all arc surfaces;

[0049] By combining the outer surface of the support roller 2 into an arc surface and a flat surface, and pressing and limiting the support roller 2 by the fixing part 42 and the limiting blocks 6 respectively, the clamping plate 3 can be stably fixed on the support roller 2 without rotating.

[0050] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A printer with a novel paper width adjustment structure, comprising a machine body (1), a paper bin (11) is arranged inside the machine body (1), and a support roller (2) is arranged inside the paper bin (11), characterized in that: Two clamping plates (3) are slidably arranged on the support roller (2). Through holes (31) are formed in the clamping plates (3). The size of the through holes (31) is larger than the cross-sectional size of the support roller (2). At least one pressing member (4) is fixed to the inner wall of the through hole (31). The pressing member (4) includes an elastic portion (41) and a fixing portion (42). When the elastic portion (41) undergoes elastic deformation, the elastic portion (41) generates a restoring force to press and fix the fixing portion (42) on the support roller (2).

2. The printer with a novel paper width adjustment structure according to claim 1, characterized in that: The elastic portion (41) includes at least one bent elastic sheet. One end of the bent elastic sheet is fixedly connected to the inner wall of the through hole (31), and the other end of the bent elastic sheet is fixedly connected to the fixing portion (42).

3. The printer with a novel paper width adjustment structure according to claim 2, characterized in that: The bent elastic sheet is in a wavy shape. There are two bent elastic sheets, symmetrically arranged at both ends of the fixing portion (42). The materials of both the elastic portion (41) and the fixing portion (42) are rubber.

4. The printer with a novel paper width adjustment structure according to claim 1, characterized in that: The elastic portion (41) includes at least one straight elastic sheet. One end of the straight elastic sheet is fixedly connected to the inner wall of the through hole (31), and the other end of the straight elastic sheet is fixedly connected to the fixing portion (42).

5. The printer with a novel paper width adjustment structure according to claim 2, wherein: There are two pressing members (4), symmetrically arranged on the inner wall of the through hole (31). When the elastic portion (41) does not undergo elastic deformation, the distance between the two fixing portions (42) is smaller than the distance between the two surfaces of the support roller (2) that are in contact with the fixing portions (42).

6. The printer with a novel paper width adjustment structure according to claim 5, characterized in that: The surface of the fixing portion (42) on one clamping plate (3) facing the other clamping plate (3) is set as an inclined surface. The inclined surface faces the support roller (2). The maximum distance between the inclined surfaces of the two fixing portions (42) on the clamping plate (3) is not less than the distance between the support roller (2) and the surfaces of the two fixing portions (42) that are in contact.

7. The printer with a novel paper width adjustment structure according to claim 2, characterized in that: Support rings (5) are arranged on the back sides of the two clamping plates (3). The size of the ring opening of the support ring (5) is adapted to the size of the through hole (31). The pressing member (4) extends into the inner wall of the support ring (5) along the central axis direction of the support roller (2).

8. The printer with a novel paper width adjustment structure according to claim 7, characterized in that: The thickness of the elastic portion (41) is 0.8 mm - 1.2 mm. The width of the surface of the fixing portion (42) in contact with the support roller (2) and the width of the elastic portion (41) are both 3 mm - 7 mm. The length of the surface of the fixing portion (42) in contact with the support roller (2) is 1 / 8 - 1 / 6 of the circumference of the cross-section of the support roller (2).

9. The printer with a novel paper width adjustment structure according to claim 7, characterized in that: Limit blocks (6) are symmetrically arranged on the inner walls of the through hole (31) and the inner wall of the support ring (5). The limit blocks (6) are in contact with the outer wall of the support roller (2).

10. The printer with a novel paper width adjustment structure according to claim 9, wherein the surfaces of the support roller (2) in contact with the fixing portions (42) are all flat surfaces, the surfaces of the support roller (2) in contact with the limit blocks (6) are all arc surfaces.

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