Mute one-way transmission mechanism and correction tape with same

Abstract

The utility model discloses a mute one-way transmission mechanism which comprises a first winding and unwinding belt wheel, a second winding and unwinding belt wheel and a non-return wheel, the non-return wheel is provided with a first tooth surface and a second tooth surface, the first tooth surface is arranged at the front end of the second tooth surface, the second winding and unwinding belt wheel is provided with a third tooth surface and a fourth tooth surface, and the third tooth surface is arranged at the front end of the fourth tooth surface. And a rotation stopping unit for limiting the reverse rotation of the second take-up and pay-off belt wheel is arranged between the first tooth surface and the fourth tooth surface. The second take-up and pay-off belt wheel rotates forwards to drive the clamping hook on the non-return wheel to be automatically separated from the clamping tooth, silent scratching of the correction tape is achieved, and meanwhile the situation that when a user uses the correction tape, the non-return wheel rotates earlier than the second take-up and pay-off belt wheel due to shaking or falling, and consequently the rotation stopping unit fails is avoided; the second take-up and pay-off belt wheel rotates reversely, the first surface of the second take-up and pay-off belt wheel abuts against the third surface of the non-return wheel, the reverse rotation stopping effect is achieved, clamping connection and separation of the clamping hook and the clamping teeth are achieved through the lever principle without pressing the scratching nozzle to generate torsion, and use is more convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of correction tapes, in particular to a silent one-way transmission mechanism and a correction tape with the mechanism. Background Art

[0002] The correction tape is composed of a functional film attached to a tape body and is provided to users in a rolled form. When in use, it is required to be completed by a device that releases the tape body, peels off the film, and recycles the tape body.

[0003] The correction tape needs to limit and fix the second retractable pulley during the non-scratching process, and the second retractable pulley needs to be released during the sliding process. For example, the Chinese patent (CN109203794B) discloses a coating transfer tool, which includes: a frame, a supply reel, a winding reel and a transfer head. The frame is provided with a main body, a pressing edge and a protruding part. During the transfer, the protruding part pushes a part of the central part of the main body including the left and right directions toward the transfer surface. The coating transfer tool prevents the coating film from being transferred in the central part of the pressing edge of the transfer head and is convenient to use.

[0004] However, the coating transfer in the above patent is mainly achieved by the engagement of the locking tooth and the locking claw during use to limit the supply reel, and the locking claw is moved away from the locking tooth by utilizing the torque generated by pressing the transfer head and the lever prying principle; however, it is possible that the locking claw cannot be moved away from the locking tooth if the pressing force is not enough; there may also be a situation where the tape is spit out when moving in the reciprocating direction after pressing the nozzle; at the same time, the assembly of the return accessories and the locking points of the above patent has alignment requirements, and the process is relatively complicated and cumbersome.

[0005] In view of this, the inventors of this case conducted in-depth research on the above-mentioned issues, which resulted in this case. Utility Model Content

[0006] The purpose of the utility model is to provide a silent one-way transmission mechanism and a correction belt having the mechanism, so as to solve the problems raised in the above-mentioned background technology.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solution:

[0008] A silent one-way transmission mechanism, comprising a first retractable pulley and a second retractable pulley meshing with each other, wherein the forward rotation direction of the second retractable pulley is defined as forward, and further comprising a non-return wheel meshing with the second retractable pulley, wherein each tooth of the non-return wheel has a first tooth surface and a second tooth surface, wherein the first tooth surface is arranged at the front end of the second tooth surface, and each tooth of the second retractable pulley has a third tooth surface and a fourth tooth surface, wherein the third tooth surface is arranged at the front end of the fourth tooth surface;

[0009] When the second retractable pulley rotates forward, the meshing third tooth surface rotates forward and fits with the second tooth surface arranged in front; when the second retractable pulley rotates reversely, the fourth tooth surface rotates backward and fits with the first tooth surface arranged in the rear, and a rotation-stopping unit is arranged between the first tooth surface and the fourth tooth surface to limit the reversal of the second retractable pulley.

[0010] Preferably, the anti-rotation unit includes a ratchet tooth and a pawl, the ratchet tooth has a first surface and a second surface with a gradient descending from the apex of the first surface, the pawl has a vertical third surface opposite to the first surface and a fourth surface inclined from the apex of the third surface to the second surface, when the second retractable pulley is reversed, the first surface and the third surface abut against each other.

[0011] Preferably, the ratchet teeth are ratchet teeth arranged at the end of the second retractable pulley, and the pawls are teeth arranged at the end of the anti-return wheel.

[0012] Preferably, both the second tooth surface and the third tooth surface are arc-shaped, and the arcs of the second tooth surface and the third tooth surface that are in contact with each other are opposite to each other.

[0013] Preferably, each of the third tooth surfaces has a fifth tooth surface extending forward, the fifth tooth surface is arranged in front of the corresponding third tooth surface, and the third tooth surface and the fifth tooth surface are arranged to overlap.

[0014] Preferably, the width of the teeth of the second retractable pulley in the transverse direction is greater than the width of the teeth of the non-return wheel in the transverse direction.

[0015] Preferably, it also includes a limiting unit, which includes a hook and a tooth. The hook is arranged on the non-return wheel. The positive rotation of the second retractable pulley drives the hook arranged on the non-return wheel to move, and drives the hook to engage or separate with the tooth.

[0016] A correction tape comprises a first shell and a second shell, wherein the silent one-way transmission mechanism as described above is arranged between the first shell and the second shell.

[0017] Preferably, the first housing or the second housing is provided with a first clamping column on which the first retractable pulley is mounted, a second clamping column on which the second retractable pulley is mounted, and a third clamping column on which the anti-return wheel is mounted.

[0018] By adopting the above-mentioned design scheme, the beneficial effects of the utility model are as follows: the silent one-way transmission mechanism and the correction belt with the mechanism disclosed by the utility model, when scratching the belt, the second take-up and release pulley rotates forward, driving the hook on the non-return wheel to automatically separate from the tooth, thereby realizing silent scratching of the correction belt and avoiding the user from shaking or falling during use, causing the non-return wheel to rotate before the second take-up and release pulley, thereby causing the non-return wheel to fail; when the second take-up and release pulley is reversed, the first surface of the second take-up and release pulley and the third surface of the non-return wheel are abutted against each other to achieve the effect of reverse rotation prevention, and there is no need to press the scratching nozzle to generate torque to realize the connection and separation of the hook and the tooth through the lever principle, so there is no situation where the pressing force is insufficient, and it is more convenient to use; at the same time, by setting the overlapping tooth treatment of the fifth tooth surface, the shaking space gap between the second take-up and release pulley and the non-return wheel is greatly reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the utility model;

[0020] Figure 2 It is an exploded view of the utility model;

[0021] Figure 3 This is a schematic diagram of the second retractable pulley in the utility model when it rotates forward;

[0022] Figure 4 This is a schematic diagram of the second retractable pulley in the present invention when it is reversed;

[0023] Figure 5 It is a structural schematic diagram of the overlapping teeth processing of the second retractable pulley in the utility model;

[0024] In the figure: the first shell 11, the second shell 12, the installation cavity 13, the first clamping column 141, the second clamping column 142, the third clamping column 143, the first retractable pulley 2, the second retractable pulley 3, the third tooth surface 31, the fourth tooth surface 32, the first surface 331, the second surface 332, the fifth tooth surface 34, the check wheel 4, the first tooth surface 41, the second tooth surface 42, the third surface 431, the fourth surface 432, the hook 51, and the tooth 52. DETAILED DESCRIPTION

[0025] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] Reference Figures 1 to 5

[0027] For the convenience of description, the forward rotation direction of the second retractable pulley 3 (which will be described in detail below) is defined as the forward direction, and the reverse rotation direction is defined as the backward direction.

[0028] A correction tape includes a first shell 11 and a second shell 12, a mounting cavity 13 is formed between the first shell 11 and the second shell 12, a silent one-way transmission mechanism is arranged between the first shell 11 and the second shell 12, and a first clamping column 141 for a first retractable belt wheel 2 (described in detail below) to be sleeved, a second clamping column 142 for a second retractable belt wheel 3 to be sleeved, and a third clamping column 143 for a non-return wheel 4 to be sleeved are arranged on the first shell 11 or the second shell 12. It is worth noting that the first retractable belt wheel 2 in this embodiment is a supply wheel and can also be a reel wheel.

[0029] The silent one-way transmission mechanism comprises a first retractable pulley 2 and a second retractable pulley 3 meshing with each other and a non-return wheel 4 meshing with the second retractable pulley 3, a limiting unit is arranged between the second retractable pulley 3 and the non-return wheel 4, the limiting unit comprises a hook 51 and a tooth 52, the hook 51 is arranged on the non-return wheel 4, the tooth 52 is arranged on the first shell 11 or the second shell 12, when the second retractable pulley 3 rotates forward, the hook 51 arranged on the non-return wheel 4 is driven to move, and the hook 51 is driven to engage or separate with the tooth 52. It is worth noting that the hook 51 and the tooth 52 only play a slight obstructive role in this embodiment, which is different from the conventional non-rotation structure, so as to achieve silence; at the same time, the limiting unit is arranged in this embodiment to ensure that when the second retractable pulley 2 rotates forward, the driving source of the non-return wheel 4 is all from the second retractable pulley 2, so as to avoid the self-rotation of the non-return wheel 4, and at the same time, avoid the situation that the utility model limits the non-return wheel 4 during transportation or shaking, so that it does not rotate.

[0030] When the second retractable pulley 3 rotates forward, the second retractable pulley 3 drives the non-return wheel 4 to rotate normally (conventional gear rotation principle); at this time, although the hook 51 on the non-return wheel 4 and the latch tooth 52 on the first shell 11 or the second shell 12 play an obstructive role, the latch tooth 52 has a small amplitude of up and down bounce, so when working normally, it reaches a silent state, or even a nearly silent state.

[0031] Furthermore, each tooth of the check wheel 4 has a first tooth surface 41 and a second tooth surface 42, and the first tooth surface 41 is arranged at the front end of the second tooth surface 42. Each tooth of the second retractable pulley 3 has a third tooth surface 31 and a fourth tooth surface 32, and the third tooth surface 31 is arranged at the front end of the fourth tooth surface 32.

[0032] When the second retractable pulley 3 rotates forward, Figure 3 As shown in the working principle diagram, the meshing third tooth surface 31 rotates forward and fits with the second tooth surface 42; when the second retractable pulley 3 reverses, as shown in FIG. Figure 4As shown in the working principle diagram, the fourth tooth surface 32 rotates backward and fits with the first tooth surface 41. The first tooth surface 41 on the anti-reverse wheel 4 and the fourth tooth surface 32 on the second retractable pulley 3 cooperate with each other. As the degree of reversal becomes more and more severe, the mutual interference between the two will increase, so that further reversal is impossible, thereby achieving the effect of reversal prevention.

[0033] A stop unit for limiting the reverse rotation of the second retractable pulley 3 is provided between the first tooth surface 41 and the fourth tooth surface 32. The stop unit includes a ratchet tooth 33 provided at the end of the second retractable pulley 3 and a pawl 43 provided at the end of the check wheel 4. The ratchet tooth 33 has a first surface 331 and a second surface 332 having a gradient descending from the vertex of the first surface 331. The pawl 43 has a third surface 431 perpendicular to the first surface 331 and a fourth surface 432 inclined from the vertex of the third surface 431 to the second surface 332. When the second retractable pulley 3 is reversed, the first surface 331 and the third surface 431 abut against each other. When the second retractable pulley 3 rotates forward, the third tooth surface 31 continuously passes over the second tooth surface 42 and rotates. However, if the second retractable pulley 3 rotates forward, the first surface 331 and the third surface 431 abut against each other.

[0034] Furthermore, the second tooth surface 42 and the third tooth surface 31 are both arc-shaped, and the arcs of the second tooth surface 42 and the third tooth surface 31 that are in contact with each other are opposite to each other.

[0035] Furthermore, each third tooth surface 31 extends forward with a fifth tooth surface 34, which is arranged in front of the corresponding third tooth surface 31, and the third tooth surface 31 is arranged to overlap with the fifth tooth surface 34. The transverse width of the tooth along the second retractable pulley 3 is greater than the transverse width of the tooth along the non-return wheel 4. This scheme adopts a stacked tooth treatment, which greatly reduces the shaking space gap between the non-return wheel 4 and the second retractable pulley 3 while meeting the forward rotation space requirements between the gears.

[0036] By adopting the above-mentioned design scheme, the beneficial effects of the utility model are as follows: the silent one-way transmission mechanism disclosed by the utility model and the correction belt having the same, when scratching the belt, the second retractable pulley 3 rotates forward, driving the hook 51 on the non-return wheel 4 to automatically separate from the tooth 52, thereby realizing silent scratching of the correction belt; when the second retractable pulley 3 is reversed, the first surface 331 of the second retractable pulley 3 and the third surface 431 of the non-return wheel 4 are abutted against each other, achieving the effect of reverse rotation and stopping, and there is no need to press the scratching nozzle to generate torque to realize the connection and separation of the hook 51 and the tooth 52 through the lever principle, so there is no situation where the pressing force is insufficient, and it is more convenient to use; at the same time, by setting the overlapping tooth treatment of the fifth tooth surface 34, the shaking space gap between the second retractable pulley 3 and the non-return wheel 4 is greatly reduced.

[0037] 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. A silent one-way transmission mechanism, comprising a first retractable pulley and a second retractable pulley meshing with each other, wherein the forward direction of the second retractable pulley is defined as the forward direction, and characterized in that: It also includes a non-return wheel meshed with the second retractable pulley, each tooth of the non-return wheel has a first tooth surface and a second tooth surface, the first tooth surface is arranged at the front end of the second tooth surface, each tooth of the second retractable pulley has a third tooth surface and a fourth tooth surface, the third tooth surface is arranged at the front end of the fourth tooth surface; When the second retractable pulley rotates forward, the meshing third tooth surface rotates forward and fits with the second tooth surface arranged in front; when the second retractable pulley rotates reversely, the fourth tooth surface rotates backward and fits with the first tooth surface arranged in the rear, and a rotation-stopping unit is arranged between the first tooth surface and the fourth tooth surface to limit the reversal of the second retractable pulley.

2. A silent one-way transmission mechanism according to claim 1, characterized in that: The anti-rotation unit includes a ratchet tooth and a pawl, the ratchet tooth has a first surface and a second surface with a gradient descending from the apex of the first surface, the pawl has a vertical third surface opposite to the first surface and a fourth surface inclined from the apex of the third surface to the second surface, when the second retractable pulley is reversed, the first surface and the third surface abut against each other.

3. A silent one-way transmission mechanism according to claim 2, characterized in that: The ratchet teeth are ratchet teeth arranged at the end of the second retractable pulley, and the pawls are teeth arranged at the end of the anti-return wheel.

4. A silent one-way transmission mechanism according to claim 2, characterized in that: The second tooth surface and the third tooth surface are both arc-shaped, and the arcs of the second tooth surface and the third tooth surface that are in contact with each other are opposite to each other.

5. A silent one-way transmission mechanism according to claim 2, characterized in that: Each of the third tooth surfaces has a fifth tooth surface extending forward, the fifth tooth surface is arranged in front of the corresponding third tooth surface, and the third tooth surface and the fifth tooth surface are arranged to overlap.

6. A silent one-way transmission mechanism according to claim 5, characterized in that: The width of the teeth of the second retractable pulley in a transverse direction is greater than the width of the teeth of the non-return wheel in a transverse direction.

7. A silent one-way transmission mechanism according to claim 1, characterized in that: It also includes a limiting unit, which includes a hook and a tooth. The hook is arranged on the anti-return wheel. The forward rotation of the second retractable pulley drives the hook arranged on the anti-return wheel to move, and drives the hook to engage or separate with the tooth.

8. A correction tape, characterized in that: It comprises a first shell and a second shell, wherein a silent one-way transmission mechanism as claimed in any one of claims 2 to 7 is arranged between the first shell and the second shell.

9. A correction tape according to claim 8, characterized in that: The first housing or the second housing is provided with a first clamping column on which the first retractable belt pulley is sleeved, a second clamping column on which the second retractable belt pulley is sleeved, and a third clamping column on which the anti-return wheel is sleeved.

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