Elastic paper guide mechanism

Abstract

The utility model discloses an elastic paper guide mechanism, which relates to the technical field of printers and comprises a support plate and a circular support, the circular support is rotatably connected to one side of the support plate, a torsion spring is arranged between the circular support and the support plate, and the torsion spring is connected with the support plate. The two ends of the torsional spring are fixed to the circular support and the supporting plate respectively, and the torsional spring has a hindering effect on rotation of the circular support. The rod piece is arranged on the side, away from the supporting plate, of the circular support, one end of the rod piece is rotationally connected to the axis of the circular support, the other end of the rod piece is fixed to the circular support, and the fixing position of the other end of the rod piece and the circular support can change in the circumferential direction of the circular support. According to the utility model, the mounting angle of the rod piece can be adjusted, so that the position between the mechanism and printing paper can be freely set, the mechanism does not need to always form an angle with a printing paper tube, and the flexibility and convenience of the mechanism in use are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of printers, in particular to an elastic paper guiding mechanism. Background Art

[0002] The printer's paper guide structure enables the paper to move forward in a certain direction and angle, and can provide different tensions for paper of different tightness, thereby avoiding paper direction deviation or paper jams.

[0003] In the Chinese patent publication number CN209289965U, a barcode printer with an elastic paper guide mechanism is proposed. The elastic paper guide structure in the patent includes a fixed shaft, a spring sheet and an elastic member. The spring sheet is provided with a hinge part and a pressing part. The hinge part is rotatably matched with the fixed shaft. The pressing part extends from the hinge part toward the printing paper receiving cavity. The free end of the elastic member abuts against the pressing part. Through the abutment between the rotatable spring sheet and the elastic member, the printing paper is pressed by the pressing part of the spring sheet, so that the printing paper is in a taut and straight state before entering the thermal printing mechanism, and can be printed smoothly, effectively improving the printing stability.

[0004] However, the elastic paper guide structure in the patent needs to be installed at a certain angle to the printing paper tube to achieve the tension effect, which reduces the flexibility of use. Moreover, when the printing paper is reduced, the tension provided by the elastic paper guide structure will continue to decrease, thereby affecting the stability of printing. Utility Model Content

[0005] The utility model provides an elastic paper guiding mechanism, which has the advantages of not needing to consider the installation angle between the mechanism and the printing paper roll and being able to continuously provide stable tension, so as to solve the problems raised in the background technology.

[0006] In order to achieve the purpose of not needing to consider the installation angle between the mechanism and the printing paper roll and being able to continuously provide stable tension, the utility model provides the following technical solutions: an elastic paper guiding mechanism, comprising a support plate, and also comprising: a circular bracket, the circular bracket is rotatably connected to one side of the support plate, a torsion spring is provided between the circular bracket and the support plate, the two ends of the torsion spring are respectively fixed to the circular bracket and the support plate, and the torsion spring has an obstructing effect on the rotation of the circular bracket; a rod member, the rod member is provided on the side of the circular bracket away from the support plate, and one end of the rod member is rotatably connected to the axis of the circular bracket, the other end of the rod member is fixed to the circular bracket, and the fixed position of the other end of the rod member and the circular bracket can be changed along the circumferential direction of the circular bracket; a fixed roller is rotatably provided at one end of the rod member close to the axis of the circular bracket, a movable roller is provided at one end of the rod member away from the axis of the circular bracket, an elastic structure is provided between the movable roller and the rod member, the movable roller is rotatably connected to the elastic structure, and the elastic structure is used to hinder the movement of the movable roller toward the axis of the circular bracket.

[0007] As a preferred technical solution of the utility model, a first bolt is fixedly provided at one end of the rod member away from the axis of the circular bracket, and the first bolt is arranged on the surface of the rod member close to the circular bracket. An annular groove is circumferentially provided on the surface of the circular bracket corresponding to the position of the first bolt, and the first bolt can move along the annular groove; a first nut is threadedly connected to the outer circumferential surface of the first bolt, and the first nut can fix the first bolt in the annular groove to fix the rod member.

[0008] As a preferred technical solution of the utility model, a receiving groove is provided in the rod, and a guide shaft is fixed in the receiving groove along the length direction; the elastic structure includes a spring, and the spring is sleeved on the outer circumferential surface of the guide shaft. A moving block is provided between the spring and the receiving groove, and the moving block is slidably connected to the outer circumferential surface of the guide shaft.

[0009] As a preferred technical solution of the utility model, a limit block is provided at the end of the moving block away from the spring, and the limit block is slidably connected to the outer circumferential surface of the guide shaft. A through groove is opened at the position of the rod corresponding to the limit block, and the through groove penetrates into the accommodating groove; a second bolt is fixed on the limit block, and the second bolt passes through the through groove to the outside of the rod, and the outer circumferential surface of the second bolt is threadedly connected with a second nut, and the second nut can fix the second bolt in the through groove to fix the limit block.

[0010] As a preferred technical solution of the utility model, a mounting groove is provided on one side of the support plate close to the circular bracket, and the torsion spring is located in the mounting groove; a plurality of fixing grooves are provided on the circumferential surface of the mounting groove, one end of the torsion spring is fixed in the fixing groove, and one end of the torsion spring can obtain different sizes of torque by being fixed in different fixing grooves.

[0011] As a preferred technical solution of the utility model, the outer circumferential surfaces of the fixed roller and the movable roller are fixedly provided with a rubber layer, and the rubber layer can increase the friction between the fixed roller and the movable roller and the printing paper.

[0012] As a preferred technical solution of the utility model, the circular bracket is hollowed out to reduce the weight of the circular bracket.

[0013] Compared with the prior art, the utility model provides an elastic paper guide mechanism, which has the following beneficial effects:

[0014] 1. The elastic paper guide mechanism is provided with a rod installed on a circular bracket, and the installation angle of the rod can be adjusted, so that the position between the mechanism and the printing paper can be freely set, and there is no need to make the mechanism always form an angle with the printing paper tube, which increases the flexibility and convenience of the mechanism.

[0015] 2. The elastic paper guiding mechanism is provided with a moving roller and a fixed roller, and the moving roller is installed on the elastic structure, and a torsion spring is provided between the circular bracket and the support plate. Under the combined action of the moving roller, the fixed roller, the elastic structure, the circular bracket and the torsion spring, when the radius of the paper tube of the printing paper gradually decreases, the mechanism can continuously provide stable tension and buffering effect, will not be affected by the reduction of the printing paper, and improves the stability of the mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 This is an exploded view of the side rear view of the utility model;

[0018] Figure 3 This is an exploded view of the utility model from the side front;

[0019] Figure 4 This is a schematic diagram of the rod structure of the utility model;

[0020] Figure 5 This is a cross-sectional view of the rod structure of the utility model;

[0021] Figure 6 This is a schematic diagram of the support plate structure of the utility model;

[0022] Figure 7 This is a schematic diagram of the winding of printing paper of the utility model.

[0023] In the figure: 1. support plate; 2. circular bracket; 21. annular groove; 3. torsion spring; 4. rod; 5. accommodating groove; 6. through groove; 7. fixed roller; 8. moving roller; 9. first bolt; 10. first nut; 11. second bolt; 12. second nut; 13. guide shaft; 14. moving block; 15. limit block; 16. spring; 17. mounting groove; 171. fixed groove; 18. printing paper. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] See also Figure 1-Figure 3The utility model discloses an elastic paper guiding mechanism, including a support plate 1 fixed to a printer housing, and also including a circular bracket 2, the circular bracket 2 is rotatably connected to one side of the support plate 1, a torsion spring 3 is provided between the circular bracket 2 and the support plate 1, the torsion spring 3 is sleeved on a rotating shaft therebetween, and two ends of the torsion spring 3 are respectively fixed to the circular bracket 2 and the support plate 1, when the circular bracket 2 rotates, the torsion spring 3 can hinder the rotation of the circular bracket 2, thereby making the circular bracket 2 move within a smaller angle.

[0026] In addition, a rod 4 is provided on the side of the circular bracket 2 away from the support plate 1, and one end of the rod 4 is rotatably connected to the axis of the circular bracket 2, and the other end of the rod 4 is fixed to the circular bracket 2. The fixed position of the other end of the rod 4 and the circular bracket 2 can be changed along the circumference of the circular bracket 2, so that the rod 4 can be fixed to the circular bracket 2 at any angle around the axis of the circular bracket 2.

[0027] Furthermore, a fixed roller 7 is rotatably provided at one end of the rod 4 close to the axis of the circular bracket 2, and a movable roller 8 is provided at one end of the rod 4 away from the axis of the circular bracket 2. An elastic structure is provided between the movable roller 8 and the rod 4, and the movable roller 8 is rotatably connected to the elastic structure. The movable roller 8 can move together with the elastic structure. When the movable roller 8 moves toward the axis of the circular bracket 2, the elastic structure can hinder the movement of the movable roller 8, and the printing paper 18 passes through between the fixed roller 7 and the movable roller 8 (such as Figure 7 As shown in the figure, when the printing paper 18 is pulled out, the movable roller 8 can support the printing paper 18 to prevent the printing paper 18 from being too loose and thus affecting the paper output. When the pulling force is too great, the elastic structure can also play a buffering role to avoid tearing the printing paper 18.

[0028] In this embodiment, since the rod 4 can be fixed on the circular bracket 2 at any angle around the axis of the circular bracket 2, the position between the mechanism and the printing paper 18 can be freely set, and there is no need for the mechanism to always form an angle with the printing paper tube, which increases the flexibility and convenience of the mechanism; at the same time, the movable roller 8 and the fixed roller 7 are installed on the circular bracket 2 with the rod 4, and the circular bracket 2 will also rotate when the printing paper 18 is pulled out. Under the obstruction of the torsion spring 3, the circular bracket 2 will move within a smaller angle, thereby further exerting tension and buffering effect on the printing paper 18, and under the combined action of the movable roller 8, the fixed roller 7, the elastic structure, the circular bracket 2 and the torsion spring 3, when the radius of the paper tube of the printing paper 18 gradually decreases, the mechanism can continue to provide stable tension and buffering effect, and will not be affected by the reduction of the printing paper 18.

[0029] Combination Figure 3In order to enable the rod 4 to be fixed to the circular bracket 2 at any angle around the axis of the circular bracket 2, a first bolt 9 is fixed to one end of the rod 4 away from the axis of the circular bracket 2. The first bolt 9 is arranged on the surface of the rod 4 close to the circular bracket 2. The surface of the circular bracket 2 is provided with a ring groove 21 along the circumferential direction corresponding to the position of the first bolt 9. The first bolt 9 can move along the ring groove 21 so that the rod 4 can rotate, and a first nut 10 is threadedly connected to the outer circumferential surface of the first bolt 9. The first nut 10 is tightened to the surface of the circular bracket 2, so that the first bolt 9 can be fixed in the ring groove 21, and then the rod 4 is fixed to the selected position.

[0030] Combination Figure 4 , Figure 5 In order to facilitate the installation of the elastic structure, a receiving groove 5 is opened in the rod 4 along the length direction of the rod 4, and a guide shaft 13 is fixed in the receiving groove 5 along the length direction. The guide shaft 13 can provide a guiding function for the elastic structure.

[0031] The elastic structure includes a spring 16, which is sleeved on the outer surface of the guide shaft 13. A moving block 14 is provided between the spring 16 and the accommodating groove 5. The moving block 14 is slidably connected to the outer surface of the guide shaft 13. The moving block 14 can compress the spring 16 when moving, and the spring 16 can reset the moving block 14.

[0032] Combination Figure 5 In order to facilitate the adjustment of the maximum distance between the moving block 14 and the axis of the circular bracket 2, a limit block 15 is provided at the end of the moving block 14 away from the spring 16. The limit block 15 is slidably connected to the outer peripheral surface of the guide shaft 13. A through groove 6 that penetrates to the accommodating groove 5 is opened at the position of the rod 4 corresponding to the limit block 15. A second bolt 11 is fixed on the limit block 15. The second bolt 11 passes through the through groove 6 to the outside of the rod 4. The outer peripheral surface of the second bolt 11 is threadedly connected with a second nut 12. The second nut 12 is tightened to the surface of the rod 4, so that the second bolt 11 can be fixed in the through groove 6, thereby fixing the position of the limit block 15, and then limiting the moving block 14, and adjusting the position of the moving roller 8.

[0033] Combination Figure 2 In order to facilitate the adjustment of the torsion of the torsion spring 3, a mounting groove 17 is provided on one side of the support plate 1 close to the circular bracket 2, and the torsion spring 3 is located in the mounting groove 17. A plurality of fixing grooves 171 are provided on the circumference of the mounting groove 17. One end of the torsion spring 3 is fixed in the fixing groove 171, and one end of the torsion spring 3 can obtain different sizes of torsion by being fixed in different fixing grooves 171. By adjusting the size of the torsion of the torsion spring 3, the tension of the mechanism on the printing paper 18 can be adjusted.

[0034] In order to increase the friction between the fixed roller 7 and the movable roller 8 and the printing paper 18, a rubber layer is fixed on the outer peripheral surface of the fixed roller 7 and the movable roller 8, so that the printing paper 18 can contact the rubber layer with greater friction, thereby preventing the printing paper 18 from slipping on the fixed roller 7 and the movable roller 8.

[0035] Combined diagram Figure 1 Or 2, in order to reduce the weight of the circular bracket 2, the circular bracket 2 is hollowed out to reduce the load of the torsion spring 3, thereby increasing the service life of the torsion spring 3.

[0036] The working principle and use process of the utility model are as follows: when in use, the fixing angle of the rod 4 is adjusted by adjusting the fixing positions of the first bolt 9 and the first nut 10 in the annular groove 21, and the fixing position of the limit block 15 is adjusted by adjusting the fixing positions of the second bolt 11 and the second nut 12 in the through groove 6, thereby adjusting the distance between the moving block 14 and the axis of the circular bracket 2, and the printing paper 18 is inserted and bypassed between the fixed roller 7 and the moving roller 8. The printing paper 18 will be pulled outward during printing, thereby tightening the moving roller 8, and at the same time, the moving roller 8 can play a tension and buffering role on the printing paper 18. When the circular bracket 2 rotates due to the movement of the printing paper 18, the torsion spring 3 can hinder the rotation of the circular bracket 2, thereby further playing a buffering and tensioning role on the printing paper 18.

[0037] In summary, the elastic paper guiding mechanism, by setting a rod 4 installed on the circular bracket 2, and being able to adjust the installation angle of the rod 4, allows the position between the mechanism and the printing paper 18 to be freely set, and there is no need for the mechanism to always form an angle with the printing paper tube, thereby increasing the flexibility and convenience of the mechanism; by setting a movable roller 8 and a fixed roller 7, and installing the movable roller 8 on the elastic structure, and at the same time setting a torsion spring 3 between the circular bracket 2 and the support plate 1, under the combined action of the movable roller 8, the fixed roller 7, the elastic structure, the circular bracket 2 and the torsion spring 3, when the radius of the paper tube of the printing paper 18 gradually decreases, the mechanism can continuously provide stable tension and buffering effect, and will not be affected by the reduction of the printing paper 18.

[0038] It should be noted that, in this article, terms such as "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0039] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An elastic paper guide mechanism, comprising a support plate (1), characterized in that: Also includes: A circular bracket (2), the circular bracket (2) being rotatably connected to one side of a support plate (1), a torsion spring (3) being provided between the circular bracket (2) and the support plate (1), two ends of the torsion spring (3) being respectively fixed to the circular bracket (2) and the support plate (1), and the torsion spring (3) having an obstructive effect on the rotation of the circular bracket (2); A rod (4), the rod (4) being arranged on a side of the circular bracket (2) away from the support plate (1), and one end of the rod (4) being rotatably connected to the axis of the circular bracket (2), and the other end of the rod (4) being fixed to the circular bracket (2), and the fixed position of the other end of the rod (4) and the circular bracket (2) being able to change along the circumference of the circular bracket (2); A fixed roller (7) is rotatably provided at one end of the rod (4) close to the axis of the circular bracket (2), and a movable roller (8) is provided at one end of the rod (4) away from the axis of the circular bracket (2). An elastic structure is provided between the movable roller (8) and the rod (4), and the movable roller (8) is rotatably connected to the elastic structure. The elastic structure is used to hinder the movement of the movable roller (8) toward the axis of the circular bracket (2).

2. The elastic paper guide mechanism according to claim 1, characterized in that: A first bolt (9) is fixedly provided at one end of the rod (4) away from the axis of the circular bracket (2); the first bolt (9) is arranged on a surface of the rod (4) close to the circular bracket (2); an annular groove (21) is provided on the surface of the circular bracket (2) along the circumferential direction corresponding to the position of the first bolt (9); and the first bolt (9) can move along the annular groove (21); The outer peripheral surface of the first bolt (9) is threadedly connected to a first nut (10), and the first nut (10) is capable of fixing the first bolt (9) in the annular groove (21) to fix the rod (4).

3. The elastic paper guide mechanism according to claim 1, characterized in that: The rod (4) is provided with a receiving groove (5), and a guide shaft (13) is fixedly provided in the receiving groove (5) along the length direction; The elastic structure comprises a spring (16), the spring (16) being sleeved on the outer peripheral surface of the guide shaft (13), a moving block (14) being provided between the spring (16) and the receiving groove (5), and the moving block (14) being slidably connected to the outer peripheral surface of the guide shaft (13).

4. The elastic paper guide mechanism according to claim 3, characterized in that: A limit block (15) is provided at one end of the moving block (14) away from the spring (16), the limit block (15) being slidably connected to the outer peripheral surface of the guide shaft (13), a through groove (6) is provided on the rod (4) at a position corresponding to the limit block (15), and the through groove (6) penetrates to the receiving groove (5); A second bolt (11) is fixedly mounted on the limit block (15), the second bolt (11) passes through the through slot (6) to the outside of the rod (4), the outer peripheral surface of the second bolt (11) is threadedly connected to a second nut (12), and the second nut (12) is capable of fixing the second bolt (11) in the through slot (6) so that the limit block (15) is fixed.

5. The elastic paper guide mechanism according to claim 1, characterized in that: A mounting groove (17) is provided on one side of the support plate (1) close to the circular bracket (2), and the torsion spring (3) is located in the mounting groove (17); A plurality of fixing grooves (171) are provided on the circumferential surface of the installation groove (17), one end of the torsion spring (3) is fixed in the fixing groove (171), and one end of the torsion spring (3) can obtain torsional forces of different magnitudes by being fixed in different fixing grooves (171).

6. The elastic paper guide mechanism according to claim 1, characterized in that: The outer circumferential surfaces of the fixed roller (7) and the movable roller (8) are both provided with a rubber layer, and the rubber layer can increase the friction between the fixed roller (7) and the movable roller (8) and the printing paper.

7. The elastic paper guide mechanism according to claim 1, characterized in that: The circular bracket (2) is hollowed out to reduce the weight of the circular bracket (2).

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