Tension maintaining mechanism and printer

Abstract

The utility model discloses a tension maintaining mechanism, and relates to the technical field of printing mechanisms, the tension maintaining mechanism comprises a first control assembly and a second control assembly, and the first control assembly is located on one side of the second control assembly; the first control assembly comprises a first rotating roller rotationally connected to the printer, a first signal transmission structure connected to the first rotating roller, a first connecting plate connected to the first rotating roller, a first adjusting roller rotationally connected to one end of the first connecting plate and a first balancing weight connected to the other end of the first connecting plate. The first rotating roller is located between the first balancing weight and the first adjusting roller, the first adjusting roller is used for abutting against a film, the first signal transmission structure is used for outputting a rotating signal of the first rotating roller to the unwinding assembly, and the second control assembly is used for controlling the rotating speed of the winding assembly. The first signal transmission structure transmits the rotating angle signal of the first rotating roller to the unwinding assembly, so that the unwinding rotating speed is automatically adjusted, namely, the tension of a film is adjusted.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of printing mechanisms, in particular to a tension maintaining mechanism and a printer. BACKGROUND

[0002] In a common paper printer, the control requirement for the tension of paper is not high, but in a printing process of a film, a film is unwound by an unwinding assembly and wound by a winding assembly, and the tension of the film needs to be controlled when the film is wound and unwound; if the tension is too small, the printing effect is affected, and if the tension is too large, the film may be broken, which needs to be improved. CONTENT OF THE UTILITY MODEL

[0003] The application aims to provide a tension maintaining mechanism and a printer, so as to adjust the tension of a film.

[0004] The tension maintaining mechanism provided by the application adopts the following technical scheme: a first control assembly and a second control assembly, the first control assembly is located on one side of the second control assembly, the first control assembly comprises a first rotating roller rotatably connected to a printer, a first signal transmission structure connected to the first rotating roller, a first connecting plate connected to the first rotating roller, a first adjusting roller rotatably connected to one end of the first connecting plate and a first counterweight connected to the other end of the first connecting plate, the first rotating roller is located between the first counterweight and the first adjusting roller, the first adjusting roller is used for abutting against a film, the first signal transmission structure is used for outputting a rotating signal of the first rotating roller to an unwinding assembly, and the second control assembly is used for controlling the rotating speed of a winding assembly.

[0005] By adopting the above technical scheme, when the film is not installed, the first adjusting roller and the first counterweight are in a balanced state, when the film is installed on the first control assembly, the film is taut, so that the first adjusting roller rotates upward around the axis of the first rotating roller. When the winding speed of the winding assembly is less than the unwinding speed of the unwinding assembly, the film is in a loose state, the first adjusting roller rotates downward around the axis of the first rotating roller under the influence of gravity, and the first counterweight rotates upward around the axis of the first rotating roller. The first rotating roller rotates by a certain angle, the first signal transmission structure transmits the rotating angle signal of the first rotating roller to the unwinding assembly, so as to automatically adjust the rotating speed of unwinding, that is, to adjust the tension of the film. When the winding speed of the winding assembly is greater than the unwinding speed of the unwinding assembly, the film is in a taut state, and the second control assembly controls the rotating speed of the winding assembly, that is, to adjust the tension of the film.

[0006] Optionally, the second control component includes a second rotating roller rotatably connected to the printer, a second signal transmission structure connected to the second rotating roller, a second connecting plate connected to the second rotating roller, a second adjusting roller rotatably connected to one end of the second connecting plate, and a second counterweight connected to the other end of the second connecting plate. The second rotating roller is located between the second counterweight and the second adjusting roller. The second adjusting roller is used to abut against the film. The second signal transmission structure is used to output a rotation signal of the second rotating roller to the take-up assembly.

[0007] By employing the above technical solution, when the film is mounted on the second control assembly, the film is taut, causing the second adjusting roller to rotate upwards around the axis of the second rotating roller. When the winding speed of the winding assembly exceeds the unwinding speed of the unwinding assembly, the film is in an over-taut state. The second adjusting roller, affected by the film's tautness, rotates upwards around the axis of the second rotating roller, while the second counterweight rotates downwards around the axis of the second rotating roller. The second rotating roller rotates at a certain angle, and the second signal transmission structure transmits this rotation angle signal to the unwinding assembly, thereby automatically adjusting the unwinding speed, i.e., adjusting the film tension.

[0008] Optionally, the first control component further includes a telescopic rod for rotating connected to the printer, one end of which is rotatably connected to the first connecting plate.

[0009] By adopting the above technical solution, when the first connecting plate rotates, the telescopic rod supports the first connecting plate, thereby improving the stability of the overall structure.

[0010] Optionally, the first counterweight block is detachably connected to the first connecting plate.

[0011] By adopting the above technical solution, the first counterweight of different weights can be replaced to adjust the initial tilt angle of the first connecting plate.

[0012] Optionally, two first connecting plates are connected to the first rotating roller, and the two ends of the first adjusting roller are respectively rotatably connected to the two first connecting plates.

[0013] By adopting the above technical solution, the two first connecting plates can better support the first rotating roller, thereby improving the stability of the overall structure.

[0014] Optionally, the first signal transmission structure includes a timing belt and a position sensor for connection to the printer. The rotating end of the position sensor and the first rotating roller are both connected to timing pulleys. The timing belt is sleeved on the two timing pulleys. The position sensor is used to output a signal to the unwinding assembly.

[0015] By adopting the technical scheme, when the first rotating roller rotates, the first rotating roller drives the synchronous belt to rotate, the synchronous belt drives the rotating end of the position sensor to rotate, the position sensor learns the rotating angle of the first rotating roller, and the position sensor outputs a signal to the unwinding assembly, so as to automatically adjust the rotating speed of the unwinding assembly, that is, to adjust the tension of the film.

[0016] Optionally, the synchronous wheel is provided with a limiting ring groove for rotating cooperation with the synchronous belt.

[0017] By adopting the technical scheme, when the synchronous belt rotates, the synchronous belt and the limiting ring groove are in rotating cooperation, which plays a guiding and limiting role on the rotation of the synchronous belt, preventing the synchronous belt from being separated from the synchronous wheel in the rotating process.

[0018] A printer comprises a body and a tension maintaining mechanism connected to the body, the body is connected with a printing assembly, an unwinding assembly and a winding assembly, a film passes through the first control assembly, the printing assembly and the second control assembly in sequence, the first control assembly is used for controlling the rotating speed of the unwinding assembly, and the second control assembly is used for controlling the rotating speed of the winding assembly.

[0019] By adopting the technical scheme, the first control assembly adjusts the rotating speed of the unwinding assembly, the second control assembly adjusts the rotating speed of the winding assembly, so as to adjust the tension of the film and improve the printing effect of the printing assembly on the film.

[0020] Optionally, the body is connected with a plurality of tension rollers.

[0021] By adopting the technical scheme, the tension roller adjusts the tension of the film to ensure that the film remains flat during production or processing, prevents slackening or excessive stretching, and thus reduces wrinkles and deformation.

[0022] Optionally, the body is connected with a plurality of rollers.

[0023] By adopting the technical scheme, the roller facilitates the movement of the body.

[0024] In summary, the present application has at least one of the following beneficial technical effects:

[0025] 1、When the film is not installed, the first adjusting roller and the first counterweight are in a balanced state. When the film is installed on the first control assembly, the film is tight, so that the first adjusting roller rotates upward around the axis of the first rotating roller. When the winding speed of the winding assembly is less than the unwinding speed of the unwinding assembly, the film is in a loose state, the first adjusting roller rotates downward around the axis of the first rotating roller under the influence of gravity, and the first counterweight rotates upward around the axis of the first rotating roller. The first rotating roller rotates by a certain angle, and the first signal transmission structure transmits the rotation angle signal of the first rotating roller to the unwinding assembly, so as to automatically adjust the rotation speed of the unwinding, that is, adjust the tension of the film. When the winding speed of the winding assembly is greater than the unwinding speed of the unwinding assembly, the film is in a tight state, and the second control assembly controls the rotation speed of the winding assembly, that is, adjusts the tension of the film.

[0026] 2、When the film is installed on the second control assembly, the film is tight, so that the second adjusting roller rotates upward around the axis of the second rotating roller. When the winding speed of the winding assembly is greater than the unwinding speed of the unwinding assembly, the film is in an over-tight state, the second adjusting roller rotates upward around the axis of the second rotating roller under the influence of the tight film, and the second counterweight rotates downward around the axis of the second rotating roller. The second rotating roller rotates by a certain angle, and the second signal transmission structure transmits the rotation angle signal of the second rotating roller to the unwinding assembly, so as to automatically adjust the rotation speed of the unwinding, that is, adjust the tension of the film. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a schematic diagram of the overall structure of the embodiment of the present application.

[0028] Figure 2 is an enlarged view of the A area of Figure 1

[0029] Figure 3 is a sectional view of the embodiment of the present application.

[0030] Figure 4 is an enlarged view of the B area of Figure 3

[0031] BRIEF DESCRIPTION OF DRAWINGS1, machine body; 11, roller; 12, tensioning roller; 2, unwinding assembly; 3, winding assembly; 4, printing assembly; 5, first control assembly; 51, first signal transmission structure; 511, position sensor; 512, synchronous belt; 52, telescopic rod; 53, first rotating roller; 54, first connecting plate; 55, first adjusting roller; 56, first counterweight; 6, second control assembly; 61, second rotating roller; 62, second connecting plate; 63, second adjusting roller; 64, second counterweight. DETAILED DESCRIPTION

[0032] The following will be described in detail with reference to the accompanying Figure 1 - drawings​Figure 4 The application is further described in detail.

[0033] The application discloses a tension maintaining mechanism and a printer.

[0034] With reference to Figure 1 , Figure 2 and Figure 3 , a printer comprises a body 1 and a tension maintaining mechanism connected to the body 1, and the bottom of the body 1 is fixedly connected with four rollers 11. The body 1 is connected with an unwinding assembly 2, a winding assembly 3 and a printing assembly 4, and the unwinding assembly 2 is located above the winding assembly 3. The unwinding assembly 2 comprises an unwinding roller rotatably connected to the body 1 and a first motor fixedly connected to the body 1, and the body 1 is connected with a controller (not shown in the figure), the signal output end of the controller is connected with the signal input end of the first motor, and the end of the unwinding roller close to the first motor is fixedly connected with the output end of the first motor. The winding assembly 3 comprises a winding roller rotatably connected to the body 1 and a second motor fixedly connected to the body 1, and the signal output end of the controller is connected with the signal input end of the second motor, and the end of the winding roller close to the second motor is fixedly connected with the output end of the second motor. The printing assembly 4 is a prior art which prints images or characters on a film. The body 1 is fixedly connected with a plurality of tension rollers 12, which can constrain the moving path of the film and play a tensioning role on the film.

[0035] With reference to Figure 2 , Figure 3 and Figure 4 , a tension maintaining mechanism comprises a first control assembly 5 and a second control assembly 6 connected to a body 1, the first control assembly 5 comprises a first signal transmission structure 51, an extension rod 52 rotatably connected to the body 1, a first rotating roller 53 rotatably connected to the body 1, two first connecting plates 54 fixedly connected to the first rotating roller 53, a first adjusting roller 55 rotatably connected to one end of the first connecting plate 54 and a first counterweight 56 detachably connected to the other end of the first connecting plate 54. One end of the extension rod 52 is rotatably connected with the first connecting plate 54, the first counterweight 56 is connected with the first connecting plate 54 through bolts, and the first rotating roller 53 is located between the first counterweight 56 and the first adjusting roller 55. The first signal transmission structure 51 comprises a position sensor 511 fixedly connected to the body 1 and a synchronous belt 512, and one end of the first rotating roller 53 and the rotating end of the position sensor 511 are fixedly connected with synchronous wheels, the synchronous belt 512 is sleeved on the two synchronous wheels, and the two synchronous wheels are provided with limiting ring grooves for rotating cooperation with the synchronous belt 512. The first signal transmission structure 51 outputs signals to a controller, and the controller receives signals and outputs signals to a first motor.

[0036] With reference to Figure 2 , Figure 3 andFigure 4 As shown, the second control assembly 6 comprises a second signal transmission structure, a second rotating roller 61 rotatably connected to the body 1, two second connecting plates 62 fixedly connected to the second rotating roller 61, a second adjusting roller 63 rotatably connected to one end of the second connecting plate 62, and a second counterweight 64 detachably connected to the other end of the second connecting plate 62. The second counterweight 64 is connected to the second connecting plate 62 through a bolt, and the second rotating roller 61 is located between the second counterweight 64 and the second adjusting roller 63. The specific structure of the second signal transmission structure is the same as that of the first signal transmission structure 51, except that the installation position is different, and thus will not be described again. The second signal transmission structure outputs a signal to the controller, the controller receives the signal and outputs a signal to the second motor.

[0037] The implementation principle of the tension maintaining mechanism and the printer according to the embodiment of the present application is as follows:

[0038] When the film is not installed, the first adjusting roller 55 and the first counterweight 56 are in a balanced state, and the second adjusting roller 63 and the second counterweight 64 are in a balanced state. When the film is installed on the first adjusting roller 55 and the second adjusting roller 63, the film is taut, so that the first adjusting roller 55 rotates upward around the axis of the first rotating roller 53, and the second adjusting roller 63 rotates upward around the axis of the second rotating roller 61. When the winding speed of the winding assembly 3 is less than the unwinding speed of the unwinding assembly 2, the film is in a loose state, the first adjusting roller 55 rotates downward around the axis of the first rotating roller 53 under the influence of gravity, the first counterweight 56 rotates upward around the axis of the first rotating roller 53, the second adjusting roller 63 rotates downward around the axis of the second rotating roller 61 under the influence of gravity, and the second counterweight 64 rotates upward around the axis of the second rotating roller 61. The first rotating roller 53 rotates by a certain angle, the first signal transmission structure 51 transmits the rotation angle signal of the first rotating roller 53 to the controller, the controller receives the signal and transmits the signal to the first motor, so as to automatically adjust the rotation speed of the first motor; the second rotating roller 61 rotates by a certain angle, the second signal transmission structure transmits the rotation angle signal of the second rotating roller 61 to the controller, the controller receives the signal and transmits the signal to the second motor, so that the rotation speeds of the unwinding roller and the winding roller are the same, thereby adjusting the tension of the film.

[0039] When the winding speed of the winding assembly 3 is greater than the unwinding speed of the unwinding assembly 2, the film is in a tight state, the first adjusting roller 55 is affected by the tightness of the film and rotates upward around the axis of the first rotating roller 53, the first counterweight 56 rotates downward around the axis of the first rotating roller 53, the second adjusting roller 63 is affected by the tightness of the film and rotates upward around the axis of the second rotating roller 61, and the second counterweight 64 rotates downward around the axis of the second rotating roller 61. The first rotating roller 53 rotates by a certain angle, the first signal transmission structure 51 transmits the rotation angle signal of the first rotating roller 53 to the controller, the controller receives the signal and transmits the signal to the first motor, so as to automatically adjust the rotation speed of the first motor; the second rotating roller 61 rotates by a certain angle, the second signal transmission structure transmits the rotation angle signal of the second rotating roller 61 to the controller, the controller receives the signal and transmits the signal to the second motor, so that the rotation speeds of the unwinding roller and the winding roller are the same, thereby adjusting the tension of the film.

[0040] The above are preferred embodiments of the present application, and do not limit the protection scope of the present application, so: any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A tension maintenance mechanism characterized by: The first control assembly (5) and the second control assembly (6) are arranged on one side of the second control assembly (6), the first control assembly (5) comprises a first rotating roller (53) rotatably connected to the printer, a first signal transmission structure (51) connected to the first rotating roller (53), a first connecting plate (54) connected to the first rotating roller (53), a first adjusting roller (55) rotatably connected to one end of the first connecting plate (54), and a first counterweight (56) connected to the other end of the first connecting plate (54), the first rotating roller (53) is located between the first counterweight (56) and the first adjusting roller (55), the first adjusting roller (55) is used for abutting against the film, the first signal transmission structure (51) is used for outputting the rotation signal of the first rotating roller (53) to the unwinding assembly (2), and the second control assembly (6) is used for controlling the rotation speed of the winding assembly (3).

2. The tension maintenance mechanism of claim 1, wherein: The second control assembly (6) comprises a second rotating roller (61) rotatably connected to the printer, a second signal transmission structure connected to the second rotating roller (61), a second connecting plate (62) connected to the second rotating roller (61), a second adjusting roller (63) rotatably connected to one end of the second connecting plate (62), and a second counterweight (64) connected to the other end of the second connecting plate (62), the second rotating roller (61) is located between the second counterweight (64) and the second adjusting roller (63), the second adjusting roller (63) is used for abutting against the film, and the second signal transmission structure is used for outputting the rotation signal of the second rotating roller (61) to the winding assembly (3).

3. The tension maintenance mechanism of claim 1, wherein: The first control assembly (5) further comprises a telescopic rod (52) rotatably connected to the printer, one end of the telescopic rod (52) is rotatably connected to the first connecting plate (54).

4. The tension maintenance mechanism of claim 1, wherein: The first counterweight (56) is detachably connected to the first connecting plate (54).

5. The tension maintenance mechanism of claim 1, wherein: There are two first connecting plates (54) connected to the first rotating roller (53), and two ends of the first adjusting roller (55) are rotatably connected to the two first connecting plates (54) respectively.

6. The tension maintenance mechanism of claim 1, wherein: The first signal transmission structure (51) comprises a synchronous belt (512) and a position sensor (511) connected to the printer, the rotating end of the position sensor (511) and the first rotating roller (53) are both connected with synchronous wheels, the synchronous belt (512) is sleeved on the two synchronous wheels, and the position sensor (511) is used for outputting signals to the unwinding assembly (2).

7. The tension maintenance mechanism of claim 6, wherein: The synchronous wheel is provided with a limiting ring groove for rotating cooperation with the synchronous belt (512).

8. A printer characterized by: The machine body (1) is connected with a printing assembly (4), an unwinding assembly (2) and a winding assembly (3), a film passes through the first control assembly (5), the printing assembly (4) and the second control assembly (6) in sequence, the first control assembly (5) is used for controlling the rotating speed of the unwinding assembly (2), and the second control assembly (6) is used for controlling the rotating speed of the winding assembly (3).

9. The printer of claim 8, wherein: The machine body (1) is connected with a plurality of tensioning rollers (12).

10. The printer of claim 8, wherein: The machine body (1) is connected with a plurality of rollers (11).

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