Correction tape

Abstract

The utility model relates to the field of stationery, in particular to a correction tape which comprises a shell, a rotating assembly and a damping part. The shell has a mounting space; the rotating assembly comprises a belt outlet wheel, a belt return wheel and a belt return ring, the belt outlet wheel is rotatably arranged in the mounting space, the belt return wheel is meshed with the belt outlet wheel, and the belt return ring is arranged on the belt return wheel in a sleeving mode; the belt returning ring is used for winding the used belt core, and the belt returning wheel and the belt returning ring can rotate relatively; the damping piece is arranged between the belt returning wheel and the belt returning ring so as to play a damping role when the belt returning wheel and the belt returning ring rotate relatively. By optimizing the structure of the correction tape, the tension of the tape body can be reduced, and the use experience of a user is improved.

Description

Technical Field

[0001] This application relates to the field of stationery, and more specifically, to a correction tape. Background Technology

[0002] Correction tape is a stationery item with correction and error correction functions. When a mistake is made while writing, the coating layer of correction tape can be used to cover the part that needs to be corrected so that the correct content can be rewritten.

[0003] Correction tape typically feeds smoothly in the initial stages of use, requiring only a small amount of force to cover the paper with the coating. However, as the tape is used longer and the length of the waste tape increases, the diameter of the tape wound on the return pulley gradually increases. The tension on the tape increases significantly in later stages of use, increasing the risk of stretching. If the tape is stretched, the uniformity of the coating layer will be affected, thus impacting the user experience.

[0004] Therefore, there is an urgent need to provide a correction belt that can reduce belt tension. Utility Model Content

[0005] This application provides a correction tape that, by optimizing its structure, can reduce the tension of the tape body and improve the user experience.

[0006] This application provides a correction band comprising: a housing, a rotating assembly, and a damping element.

[0007] The casing has installation space;

[0008] The rotating assembly includes an output pulley, a return pulley, and a return ring. The output pulley is rotatably disposed within the installation space. The return pulley is meshed with the output pulley. The return ring is sleeved on the return pulley. The return ring is used to wind the used belt core. The return pulley and the return ring can rotate relative to each other.

[0009] A damping element is disposed between the return pulley and the return ring to provide damping when the return pulley and the return ring rotate relative to each other.

[0010] According to some embodiments of this application, the return pulley includes a first cylinder and a first gear portion disposed on the outer periphery of the first cylinder;

[0011] The return ring has a mounting hole, and the return ring is sleeved onto the first cylinder through the mounting hole;

[0012] The damping element is disposed between the first cylinder and the wall of the mounting hole.

[0013] According to some embodiments of this application, the damping member includes an elastic rib, the elastic rib includes a fixed end and an elastic end opposite to the fixed end, the fixed end is connected to the first gear portion or to the outer wall of the first cylinder, and the elastic rib abuts against the wall of the mounting hole.

[0014] According to some embodiments of this application, there is a stepped surface between the axial end face of the first gear portion and the outer wall of the first cylinder, the fixed end of the elastic rib is disposed on the stepped surface, and the elastic end of the elastic rib extends toward the side away from the stepped surface.

[0015] According to some embodiments of this application, the elastic ribs include a plurality of elastic ribs, which are spaced apart in the circumferential direction of the first cylinder;

[0016] And / or, the cross-section of the elastic rib is arc-shaped.

[0017] According to some embodiments of this application, the outer wall of the elastic rib is provided with an outward protrusion.

[0018] According to some embodiments of this application, the protrusions include a plurality of protrusions, which are spaced apart in the extension direction of the elastic rib.

[0019] According to some embodiments of this application, the damping element includes an elastic washer sandwiched between the first cylinder and the mounting hole.

[0020] According to some embodiments of this application, the outer wall of the elastic rib gradually tilts toward the axis closer to the first cylinder in the direction from the fixed end to the elastic end.

[0021] According to some embodiments of this application, a first positioning post and a second positioning post are provided in the installation space, the return pulley is rotatably disposed on the first positioning post, and the output pulley is rotatably disposed on the second positioning post; the output pulley includes a second cylinder and a second gear portion disposed on the outer periphery of the second cylinder, the second gear portion meshing with the first gear portion;

[0022] According to some embodiments of this application, the correction tape further includes a core and a head, the head being disposed on the housing, with at least a portion of the head protruding from the housing; the core is sleeved on the output pulley and can rotate synchronously with the output pulley, the core having an extension end, the extension end of the core being wound around the head and fixed to the return loop.

[0023] The embodiments in the above application have at least the following advantages or beneficial effects:

[0024] In this embodiment of the correction tape, a return loop is added to the return pulley, and the return pulley and the return loop are connected by a damping element. In the initial stage of use, the diameter of the tape wound on the output pulley is larger, while the diameter of the tape wound on the return pulley is smaller. The user needs only a small pulling force to ensure the coating layer of the tape covers the paper surface. At this time, the tension generated on the tape when the user slides the tape is less than the damping force between the damping element and the return pulley, allowing the return pulley and the return loop to rotate synchronously. As correction tape is used more and more, the diameter of the tape wound on the output pulley gradually decreases, while the diameter of the tape wound on the return pulley gradually increases. Users need to apply greater tape-pulling force to ensure that the coating layer of the tape covers the paper surface. At this time, the pulling force on the tape generated by the user when sliding the tape is greater than the damping force between the damping component and the return pulley. When the return pulley rotates, the sliding friction between the damping component and the return pulley is insufficient to drive the return pulley to rotate. In other words, the pulling speed of the tape is greater than the winding speed of the tape. It is understandable that a slower winding speed helps to reduce the tension of the tape, thereby effectively reducing the risk of the tape being stretched or even broken. Attached Figure Description

[0025] Figure 1 The diagram shown is an exploded view of the correction tape provided in an embodiment of this application;

[0026] Figure 2 What is shown is Figure 1 A cross-sectional view of the correction tape;

[0027] Figure 3 What is shown is Figure 1 A schematic diagram of the three-dimensional structure after the second shell is removed from the middle correction strip;

[0028] Figure 4 What is shown is Figure 1 A three-dimensional structural diagram of the return pulley of the correction belt;

[0029] Figure 5 What is shown is Figure 4 Side view of the return pulley;

[0030] Figure 6 What is shown is Figure 4 Schematic diagram of the cross-section of the return pulley;

[0031] Figure 7 What is shown is Figure 1 The output pulley of the correction belt;

[0032] Figure 8 What is shown is Figure 1 A schematic diagram of the first housing of the correction tape;

[0033] Figure 9 What is shown is Figure 1 A schematic diagram of the second housing of the correction strip.

[0034] The annotations in the attached figures are explained as follows:

[0035] 10. Correction tape;

[0036] 100. Outer shell; 101. Installation space; 110. First housing; 111. First positioning post; 112. Second positioning post; 120. Second housing;

[0037] 200. Rotating assembly; 210. Output pulley; 211. Second cylinder; 212. Second gear section; 220. Return pulley; 221. First cylinder; 222. First gear section; 223. Stepped surface; 230. Return ring; 231. Mounting hole;

[0038] 300. Damping component; 310. Elastic rib; 311. Fixed end; 312. Elastic end; 313. Outward protrusion;

[0039] 400, with core;

[0040] 500, taking the lead;

[0041] 600, cover plate;

[0042] 700. Protective cover. Detailed Implementation

[0043] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that this application will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore their detailed description will be omitted.

[0044] In related technologies, correction tape generally includes a lead pulley, a return pulley, and a core. The core is used to wind the tape body used for correction, and the tape body is coated with a paint layer. The core is usually located on the lead pulley and can rotate synchronously with it. The lead end of the tape body needs to be wrapped around the end of the correction tape before being fixed to the return pulley. The lead pulley and the return pulley are connected by a gear structure.

[0045] When a user uses correction tape, the tip of the tape is in close contact with the paper. The user slides the correction tape, creating a cutting force on the tape. During this process, the coating layer adheres to the paper, allowing it to move from the tape onto the paper surface, thus creating a covering effect. As the correction tape is used, it is drawn from the output pulley and wound onto the return pulley. With prolonged use, the diameter of the tape wound on the output pulley gradually decreases, while the diameter wound on the return pulley increases. This causes the tape to become increasingly taut, significantly increasing the risk of the tape stretching or even breaking.

[0046] This application adds a return ring to the return pulley, which can rotate relative to the return pulley. The lead end of the belt is fixed to the return ring. By setting a damping element, the rotation of the return ring is delayed compared to the rotation of the return pulley, thereby reducing the tension of the belt itself.

[0047] The following describes an embodiment of the correction tape of this application with reference to the accompanying drawings.

[0048] It should be noted that the correction tape in this embodiment can be a white, non-transparent correction tape that covers paper errors and allows for rewriting, a decorative tape with patterns, or a covering tape, among other types of strips. The coating on the tape core can be white paint, double-sided tape, dotted double-sided tape, or 2B pencil powder, etc. The tape core and the coating on it can be adapted according to the actual use of the correction tape. The correction tape protected in this application should be interpreted broadly, rather than being limited to its corrective function.

[0049] Figure 1 The diagram shown is an exploded view of the correction tape provided in an embodiment of this application; Figure 2 What is shown is Figure 1 A cross-sectional view of the correction tape; Figure 3 What is shown is Figure 1 A schematic diagram of the three-dimensional structure after the second shell is removed from the middle correction strip.

[0050] The correction band 10 in this embodiment includes: a housing 100, a rotating assembly 200, and a damping element 300.

[0051] The housing 100 has an installation space 101. A rotating assembly 200 is disposed within the installation space 101. The rotating assembly 200 includes a pulley 210, a return pulley 220, and a return ring 230. The pulley 210 is rotatably disposed within the installation space 101. The return pulley 220 is engaged with the pulley 210. The return ring 230 is sleeved on the return pulley 220. The return ring 230 is used to wind the used belt core 400. The return pulley 220 and the return ring 230 can rotate relative to each other. A damping element 300 is disposed between the return pulley 220 and the return ring 230 to provide damping when the return pulley 220 and the return ring 230 rotate relative to each other.

[0052] In this embodiment, the correction tape 10 has a return loop 230 added to the return pulley 220, and the return pulley 220 and the return loop 230 are connected by a damping element 300. In the initial stage of use, the diameter of the tape wound on the output pulley 210 is larger, while the diameter of the tape wound on the return pulley 220 is smaller (which can be understood as a smaller load when the user slides the tape). The user needs a smaller pulling force to cover the paper surface with the coating layer of the tape. At this time, the tension generated on the tape when the user slides the tape is less than the damping force between the damping element 300 and the return loop 230, allowing the return pulley 220 and the return loop 230 to rotate synchronously. As the correction tape 10 is used more and more, the diameter of the tape wound on the output pulley 210 gradually decreases, while the diameter of the tape wound on the return pulley 220 gradually increases (which can be understood as an increase in load when the user slides the tape). The user needs a larger tape-drawing force to make the coating layer of the tape cover the paper surface. At this time, the pulling force generated on the tape when the user slides the tape is greater than the damping force between the damping element 300 and the return pulley 230. When the return pulley 220 rotates, the sliding friction between the damping element 300 and the return pulley 230 is insufficient to drive the return pulley 230 to rotate. That is to say, the pulling speed of the tape is greater than the winding speed of the tape. It can be understood that a slower winding speed is beneficial to reduce the tension of the tape, thereby effectively reducing the risk of the tape being stretched or even broken.

[0053] The location and structure of the damping element 300 are described below with reference to the attached drawings.

[0054] Specifically, Figure 4 What is shown is Figure 1 A three-dimensional structural diagram of the return pulley 220 of the correction belt 10; Figure 5 What is shown is Figure 4 Side view of the return pulley 220; Figure 6 What is shown is Figure 4 A schematic diagram of the cross-section of the return pulley 220. Figures 3 to 6As shown, the return pulley 220 includes a first cylindrical body 221 and a first gear portion 222 disposed on the outer periphery of the first cylindrical body 221. The first cylindrical body 221 is sleeved on the first positioning post 111 of the outer casing 100, and the first cylindrical body 221 is rotatable relative to the first positioning post 111. The return ring 230 has a mounting hole 231, and the return ring 230 is sleeved on the first cylindrical body 221 through the mounting hole 231. The damping member 300 is disposed between the first cylindrical body 221 and the wall of the mounting hole 231.

[0055] This configuration uses a return pulley 230 to fix the lead-out end of the belt, so that the lead-out end is no longer fixed to the return pulley 220. When the user slides the belt, the output pulley 210 rotates to release the belt, and the return pulley 220, based on its meshing relationship with the output pulley 210, rotates synchronously with the output pulley 210. The transmission chain of rotational force is: output pulley 210, return pulley 220, damper 300, and return pulley 230. The position of the damper 300 can control the pulling speed and winding speed of the belt. In the later stages of use of the correction belt 10, it effectively makes the pulling speed of the correction belt 10 less than the winding speed of the correction belt 10, thereby effectively reducing the tension of the belt.

[0056] Specifically, refer to Figures 4 to 6 As shown, the damping member 300 includes an elastic rib 310, which includes a fixed end 311 and an elastic end 312 opposite to the fixed end 311. The fixed end 311 is connected to the first gear. The elastic rib 310 abuts against the wall of the mounting hole 231.

[0057] After the return belt 230 and the return pulley 220 are assembled, the elastic rib 310 can generate a rebound force under pressure, thereby abutting against the wall of the mounting hole 231. When the user slides the belt, the tension generated on the belt body is less than the damping force between the elastic rib 310 and the wall of the mounting hole 231, and the return pulley 220 and the return belt 230 can rotate synchronously. As the correction belt 10 is used more and more, the user needs a larger tape-drawing force to cover the paper surface with the coating layer of the belt body. At this time, the tension generated on the belt body when the user slides the belt is greater than the damping force between the elastic rib 310 and the wall of the mounting hole 231. When the return pulley 220 rotates, the sliding friction between the elastic rib 310 and the wall of the mounting hole 231 is insufficient to drive the return belt 230 to rotate. That is to say, the pulling speed of the belt body is greater than the winding speed of the belt body, thereby effectively reducing the risk of the belt body being stretched or even broken.

[0058] It should also be noted that the outer wall of the elastic rib 310 can be inclined. Specifically, the outer wall of the elastic rib 310 gradually inclines toward the axis of the first cylinder 221 in the direction from the fixed end 311 to the elastic end 312.

[0059] This arrangement helps improve the assembly smoothness of the elastic rib 310, allowing the elastic rib 310 to smoothly extend into the mounting hole 231.

[0060] Furthermore, continue to refer to Figures 4 to 6 As shown, there is a stepped surface 223 between the axial end face of the first gear part 222 and the outer wall of the first cylinder 221. The fixed end 311 of the elastic rib 310 is provided on the stepped surface 223, and the elastic end 312 of the elastic rib 310 extends toward the side away from the stepped surface 223.

[0061] Due to the structural characteristics of the return pulley 220, a stepped surface 223 is formed between the first gear part 222 of the return pulley 220 and the first cylinder 221. The elastic rib 310 can be set by utilizing the stepped surface 223, which is a structure that exists on the return pulley 220 itself, so as to reduce the design cost of the return pulley 220.

[0062] Of course, in other embodiments, the fixed end 311 of the elastic rib 310 can also be set on the outer wall of the first cylinder 221. This method can also use the rebound force of the elastic rib 310 to abut against the hole wall of the mounting hole 231, achieving a similar effect to this embodiment, which will not be described in detail here.

[0063] like Figures 3 to 5 As shown, the elastic ribs 310 may include multiple elastic ribs 310, which are spaced apart in the circumferential direction of the first cylinder 221. The multiple elastic ribs 310 can ensure the damping effect between the return pulley 220 and the return ring 230, and can also make the damping force more evenly distributed, which helps to ensure the rotation effect between the return pulley 220 and the return ring 230.

[0064] For example, the cross-section of the elastic rib 310 is arc-shaped to better fit the gap between the first cylinder 221 and the mounting hole 231.

[0065] Furthermore, in order to increase the damping effect between the elastic rib 310 and the wall of the mounting hole 231, an outward protrusion 313 can be provided on the outer wall of the elastic rib 310 so that the elastic rib 310 and the wall of the mounting hole 231 have a greater abutment force.

[0066] Additionally, the damping force between the elastic rib 310 and the wall of the mounting hole 231 can be adjusted by changing the number of protrusions 313. The number of protrusions 313 can be one or more.

[0067] It is understandable that the core 400 in the correction tape 10 can be divided into different specifications (e.g., 5 meters, 10 meters, 20 meters, etc.). Correspondingly, the number of protrusions 313 can be designed according to the specifications of the core 400. For example, the more meters or months the core 400 is, the more protrusions 313 will be set.

[0068] When the correction band 10 includes a plurality of protrusions 313, the plurality of protrusions 313 may be spaced apart in the extending direction of the elastic rib 310.

[0069] In other embodiments, the damping element 300 can also be an elastic washer, sandwiched between the first cylinder 221 and the mounting hole 231. The elastic washer can provide sufficient damping force in the initial stage of use of the correction belt 10, so that the return pulley 220 and the return ring 230 rotate synchronously. In the later stage of use of the correction belt 10, the belt tension is greater than the damping force, and the elastic washer can also rotate relative to the wall of the mounting hole 231, so that the belt pulling speed is greater than the belt winding speed, thereby reducing the belt tension.

[0070] The specific structure of the outer shell is described below with reference to the accompanying drawings.

[0071] Figure 8 What is shown is Figure 1 A schematic diagram of the first housing 110 of the correction band 10; Figure 9 What is shown is Figure 1 A schematic diagram of the second housing 120 of the correction band 10. Please refer to... Figure 1 , Figure 8 and Figure 9 As shown, the outer shell 100 of the correction tape 10 includes a first shell 110 and a second shell 120. The first shell 110 and the second shell 120 enclose an installation space 101. A first positioning post 111 and a second positioning post 112 are provided in the installation space 101.

[0072] For example, the first positioning post 111 and the second positioning post 112 may be jointly disposed on the first housing 110, or jointly disposed on the second housing 120, or disposed on the first housing 110 and the second housing 120 respectively. The first housing 110 and the second housing 120 may be connected by fasteners, or by methods commonly used in the art such as bonding or snap-fitting.

[0073] The specific structure of the pulley is explained below with reference to the accompanying drawings.

[0074] Figure 7 What is shown is Figure 1 The output pulley 210 of the middle correction belt 10, refer to Figure 1 and Figure 7 As shown, the output pulley 210 is rotatably mounted on the second positioning post 112; the output pulley 210 includes a second cylinder 211 and a second gear part 212 disposed on the outer periphery of the second cylinder 211. The second gear part 212 meshes with the first gear part 222, so that the output pulley 210 and the return pulley 220 can rotate synchronously, thereby ensuring that the belt drawn from the output pulley 210 can be wound up.

[0075] The following description, in conjunction with the accompanying drawings, explains the structure at the head of the modified belt.

[0076] Reference Figure 1 and Figure 2 As shown, the correction tape 10 also includes a core 400 and a tape head 500. The tape head 500 is disposed in the housing 100, with at least a portion of the tape head 500 protruding from the housing 100. The tape head 500 has a pointed tip. When the user slides the correction tape 10, the pointed tip slides relative to the paper surface. The pointed tip can cut off the coating layer, which is beneficial for separating the coating layer from the tape body. On the other hand, the pointed tip can also increase the pressure between the tape body and the paper surface, so that the coating layer covers the paper surface more tightly.

[0077] Reference Figure 2 As shown, the correction tape 10 also includes a protective cover 700, which is disposed on the housing and is used to cover the tape head 500 to protect the exposed tape body from being cut off.

[0078] It should also be noted that the core 400 may include a winding shaft and a tape body, with the tape body wound onto the winding shaft. The tape body may include a double-layer structure; for example, the tape body may include a base layer and a coating layer applied to the base layer. During storage, transportation, and use of the correction tape 10, the base layer protects the coating layer. Under external force, the base layer can separate from the coating layer and adhere to the paper or item to be corrected. The base layer may be a flexible substrate with a smooth surface, such as a release paper tape or PET plastic tape; the coating layer may be a white paint, double-sided adhesive, dotted double-sided adhesive, or 2B pencil powder; and the tape body may utilize materials and processes found in existing technologies, which will not be detailed here.

[0079] Reference Figure 1 As shown, the correction tape also includes a cover plate 600, which is sleeved on the second positioning post 112 and covers the tape core 400, thereby ensuring that the tape core can be drawn out in an orderly manner.

[0080] This application adds a return ring to the return pulley, which can rotate relative to the return pulley. The lead end of the belt is fixed to the return ring. By setting a damping element, the rotation of the return ring is delayed compared to the rotation of the return pulley, thereby reducing the tension of the belt itself.

[0081] In the embodiments of this application, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise expressly defined. The terms "install," "connect," "link," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "link" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0082] In the description of the embodiments of the application, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the application and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the application.

[0083] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the claims. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0084] The above are merely preferred embodiments of the application examples and are not intended to limit the application examples. For those skilled in the art, the application examples can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the application examples should be included within the protection scope of the application examples.

Claims

1. A correction tape, characterized in that, include: The casing provides installation space; The rotating assembly includes a delivery pulley, a return pulley, and a return ring. The delivery pulley is rotatably disposed within the installation space. The return pulley is meshed with the delivery pulley. The return ring is sleeved on the return pulley. The return ring is used to wind the used belt core. The return pulley and the return ring are rotatable relative to each other. A damping element is disposed between the return pulley and the return ring to provide damping when the return pulley and the return ring rotate relative to each other.

2. The correction tape according to claim 1, characterized in that, The return pulley includes a first cylinder and a first gear portion disposed on the outer periphery of the first cylinder; The return ring has a mounting hole, and the return ring is sleeved onto the first cylinder through the mounting hole; The damping element is disposed between the first cylinder and the wall of the mounting hole.

3. The correction tape according to claim 2, characterized in that, The damping element includes an elastic rib, which has a fixed end and an elastic end opposite to the fixed end. The fixed end is connected to the first gear part or to the outer wall of the first cylinder, and the elastic rib abuts against the wall of the mounting hole.

4. The correction tape according to claim 3, characterized in that, There is a stepped surface between the axial end face of the first gear and the outer wall of the first cylinder. The fixed end of the elastic rib is disposed on the stepped surface, and the elastic end of the elastic rib extends toward the side away from the stepped surface.

5. The correction tape according to claim 4, characterized in that, The elastic ribs include a plurality of them, and the plurality of elastic ribs are spaced apart in the circumferential direction of the first cylinder; And / or, the cross-section of the elastic rib is arc-shaped.

6. The correction tape according to any one of claims 3-5, characterized in that, The outer wall of the elastic rib is provided with an outward protrusion.

7. The correction tape according to claim 6, characterized in that, The protruding portion includes a plurality of protruding portions, which are spaced apart in the extending direction of the elastic rib.

8. The correction tape according to claim 2, characterized in that, The damping element includes an elastic washer, which is sandwiched between the first cylinder and the mounting hole.

9. The correction tape according to any one of claims 3-5, characterized in that, The outer wall of the elastic rib gradually tilts towards the axis closer to the first cylinder in the direction from the fixed end to the elastic end.

10. The correction tape according to any one of claims 2-5, characterized in that, The installation space is provided with a first positioning post and a second positioning post. The return pulley is rotatably mounted on the first positioning post, and the output pulley is rotatably mounted on the second positioning post. The output pulley includes a second cylinder and a second gear part disposed on the outer periphery of the second cylinder. The second gear part meshes with the first gear part. And / or, The correction belt further includes a belt core and a belt head. The belt head is disposed on the housing, with at least a portion of the belt head protruding from the housing. The belt core is sleeved on the output pulley and can rotate synchronously with the output pulley. The belt core has an output end, which is wound around the belt head and fixed to the return loop.

Images