A correctable tape with switchable modes

Abstract

The utility model discloses a corrector tape of switchable mode, including casing, first transmission, second transmission, slide button, rotation -resisting arm, tape mouth and protective cover, and first transmission and second transmission are all rotationally arranged in the casing, rotation -resisting arm sets up in the casing, and rotation -resisting arm includes upper arm, lower arm, rotation axis and connecting column, be equipped with slide hole on the casing, and slide hole is opposite the setting of clamping groove, and slide button is slidably arranged in the slide hole, and slide button can slide into or slide out in the clamping groove in the process of along slide hole sliding, the protective cover sets up outside the casing, and one side of protective cover is hinged with the casing, and the protective cover is buckled on tape mouth. The technical effect reached is: in the use, through sliding slide button, can switch the silent mode and the sound mode quickly, and the operation is simple, can satisfy various different demands, and the versatility is stronger, and the application scope is wider, through setting up the protective cover, can form the protection effect to tape mouth, and the protective cover is hinged with the casing, and there is no loss risk.

Description

Technical Field

[0001] This utility model relates to the field of stationery technology, specifically to a correction tape with switchable modes. Background Technology

[0002] Correction tape is a common stationery item, primarily used to cover up writing or printing errors on paper documents, allowing for rewriting by covering the white correction material. Currently, common correction tape products on the market include silent flip-top correction tape, audible pull-out correction tape, audible push-button correction tape, and audible pen-shaped push-button correction tape. While these products generally meet the basic function of covering errors, they still have a number of obvious shortcomings in actual use, affecting user experience and applicable scenarios.

[0003] 1. Silent flip-top correction tape

[0004] These products feature a silent design, producing minimal noise during use, making them suitable for quiet environments such as libraries and examination rooms. However, their completely silent operation lacks the mechanical feedback of traditional correction tape, causing discomfort for some users who cannot confirm the effectiveness of the operation through sound. Therefore, they cannot fully meet the usage habits and psychological expectations of all consumers.

[0005] 2. Sound-activated correction tape

[0006] These products emit a "click" sound through their gear structure, providing clear operational feedback. However, they also have significant drawbacks: First, the purely audible design makes them unsuitable for quiet environments, limiting their application scenarios; second, these products typically come with a separate protective cover to protect the nozzle, but this requires repeated insertion and removal, making operation cumbersome, and the cover is easily lost, exposing the nozzle to the outside environment, making it susceptible to contamination or damage.

[0007] 3. Sound-activated mouthpiece correction tape

[0008] This type of product controls the extension and retraction of the mouthpiece through a push-button mechanism, retaining an audible feedback mechanism. However, it has the following problems: First, it still cannot meet the requirement of silent operation, limiting its use in environments such as examination rooms and conference rooms; second, it requires continuous pressing of the top button to extend the mouthpiece, which is not convenient to operate and can easily lead to hand fatigue and reduced efficiency after prolonged use.

[0009] 4. Correction tape dispensed by pressing a pen-shaped nozzle.

[0010] These products resemble pens in appearance and offer a degree of portability, but their structure also has several shortcomings: First, the purely auditory design cannot achieve a silent mode, making it unsuitable for diverse usage environments; second, the pen-shaped structure typically has a long straight section at the front, causing the internal cartridge to become unusable before it is fully used, resulting in cartridge waste; third, the push-to-dispense mechanism is prone to jamming due to manufacturing tolerances or the entry of paper scraps, dust, and other impurities during use, leading to malfunctions in the extension / retraction function and severely impacting its lifespan and reliability.

[0011] In summary, existing correction tape products suffer from limitations such as single functional modes (only sound or only silent), structural design flaws, and restricted applicability, failing to simultaneously meet the needs of different user groups and diverse usage environments. Therefore, it is necessary to propose a new correction tape structure capable of one-click switching between silent and sound modes, thereby improving the product's versatility, convenience, and user experience. Utility Model Content

[0012] Therefore, this invention provides a switchable correction band to solve the above-mentioned problems in the prior art.

[0013] To achieve the above objectives, this utility model provides the following technical solution:

[0014] According to a first aspect of the present invention, a switchable correction belt includes a housing, a first drive wheel, a second drive wheel, a sliding button, an anti-rotation arm, a belt nozzle, and a protective cover. The first drive wheel and the second drive wheel are both rotatably disposed within the housing and are connected to each other for transmission. A fixing ring is provided on one side of the first drive wheel, and a retraction wheel is provided on one side of the second drive wheel.

[0015] The anti-rotation arm is disposed within the housing and includes an upper arm, a lower arm, a rotating shaft, and a connecting column. One end of the upper arm and one end of the lower arm are both connected to the rotating shaft, and a groove is provided between the upper arm and the lower arm. A backstop pawl is provided at the end of the upper arm opposite to the rotating shaft, and a ratchet gear is provided on the side of the second transmission wheel opposite to the recovery wheel. The backstop pawl engages with the tooth groove of the ratchet gear. A limiting platform is provided within the housing, and the end of the lower arm opposite to the rotating shaft abuts against the limiting platform. One end of the connecting column is connected to the rotating shaft. The upper arm, lower arm, and connecting column are all arranged in a direction perpendicular to the rotating shaft, and the rotating shaft is rotatably connected to the housing.

[0016] The housing is provided with a sliding hole, which is directly opposite the slot. The sliding button is slidably disposed in the sliding hole. The sliding button can slide into or out of the slot during the sliding process along the sliding hole.

[0017] One end with the nozzle is connected to the end of the connecting post opposite to the rotating shaft, and the other end with the nozzle extends outside the housing;

[0018] The protective cover is disposed outside the housing, one side of the protective cover is hinged to the housing, and the protective cover is fastened to the spout.

[0019] Furthermore, a positioning protrusion is provided at the end of the lower arm opposite to the rotation axis, and the positioning protrusion abuts against the limiting platform.

[0020] Furthermore, the end with the nozzle is provided with a connector, which is engaged with the end of the connecting post opposite to the rotating shaft.

[0021] Furthermore, the ratchet is coaxial with the second transmission wheel, the ratchet is an internal gear, and the ratchet is embedded in the second transmission wheel.

[0022] Furthermore, both the first transmission wheel and the second transmission wheel are gears, which mesh with each other, and the diameter of the first transmission wheel is larger than the diameter of the second transmission wheel.

[0023] Furthermore, the housing includes a first housing and a second housing, which are detachably connected.

[0024] Furthermore, the inner side of the first housing is provided with a positioning post, a first positioning ring and a second positioning ring, and the positioning post, the first positioning ring and the second positioning ring are arranged sequentially along the length direction of the first housing;

[0025] The inner side of the second housing is provided with a first rotating shaft, a second rotating shaft, and a third rotating shaft, which are arranged sequentially along the length direction of the second housing; a sliding hole is provided on the second housing, and the sliding hole is located between the second rotating shaft and the third rotating shaft; a limiting platform is provided inside the second housing, and the sliding hole is located above the limiting platform;

[0026] The first rotating shaft, the second rotating shaft, and the third rotating shaft are respectively configured to correspond one-to-one with the positioning post, the first positioning ring, and the second positioning ring.

[0027] Furthermore, the first transmission wheel is rotatably mounted on the first rotating shaft, the second transmission wheel is rotatably mounted on the second rotating shaft, and the rotating shaft is rotatably mounted on the third rotating shaft.

[0028] Furthermore, a locking sleeve is provided on one side of the first transmission wheel, the locking sleeve is coaxially arranged with the first transmission wheel, and the fixing ring is snapped onto the locking sleeve.

[0029] Furthermore, the shell is transparent.

[0030] This utility model has the following advantages: When the sliding button is positioned outside the slot, pressing down on the nozzle for correction causes the nozzle to rotate the rotating shaft. During the rotation of the rotating shaft, the lower arm is pressed down, causing it to deform to a certain extent and causing the end of the upper arm away from the rotating shaft to move down, thus disengaging the anti-reverse pawl from the ratchet. During use, when the second transmission wheel rotates, the anti-reverse pawl and ratchet do not contact each other, and no sound is emitted, making it a silent mode. After use, the anti-rotation arm can automatically return to its original position under the action of the lower arm's own elasticity; when the sliding button is positioned inside the slot, pressing down... When pressing the nozzle for correction, the upper arm cannot move because the sliding button blocks it. The anti-reverse pawl remains locked in the groove of the ratchet. During use, when the second drive wheel rotates, the anti-reverse pawl and ratchet are in continuous contact, thus producing a clicking sound, which is the audible mode. During use, the silent mode and audible mode can be quickly switched by sliding the sliding button. The operation is simple and can meet various needs, making it more versatile and applicable to a wider range of situations. The protective cover protects the nozzle and is hinged to the housing, eliminating the risk of loss. Attached Figure Description

[0031] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0032] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportional relationships, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0033] Figure 1 An exploded view of a switchable correction tape provided for some embodiments of this utility model.

[0034] Figure 2 A first-view view of a switchable correction band provided for some embodiments of the present invention.

[0035] Figure 3 A second-view view of a switchable correction band provided for some embodiments of the present invention.

[0036] Figure 4 This is a schematic diagram of the internal structure of a switchable correction band after removing the first housing, as provided in some embodiments of the present invention.

[0037] Figure 5 This is a schematic diagram of the internal structure of a switchable correction band after removing the second housing, as provided in some embodiments of the present invention.

[0038] Figure 6 This is a schematic diagram of the structure of the first housing of a switchable correction tape provided for some embodiments of the present invention.

[0039] Figure 7 This is a schematic diagram of the structure of the second housing of a switchable correction tape provided for some embodiments of the present invention.

[0040] Figure 8 This is a schematic diagram of the drive wheel of a switchable correction belt, provided for some embodiments of the present invention.

[0041] Figure 9 This is a structural schematic diagram of the driven wheel of a switchable correction belt, provided in some embodiments of the present invention, from a first-view perspective.

[0042] Figure 10 This is a structural schematic diagram of the driven wheel of a switchable correction belt from a second perspective, provided for some embodiments of the present invention.

[0043] Figure 11 A first-view view of a switchable correction belt anti-rotation arm provided for some embodiments of the present invention.

[0044] Figure 12 A second-view view of a switchable correction belt anti-rotation arm provided for some embodiments of the present invention.

[0045] Figure 13 This is a schematic diagram of the nozzle of a switchable correction tape provided for some embodiments of the present invention.

[0046] In the diagram: 1. First housing, 2. Second housing, 3. First drive wheel, 4. Fixing ring, 5. Second drive wheel, 6. Retraction wheel, 7. Slide button, 8. Anti-rotation arm, 9. With nozzle, 10. Protective cover, 11. Positioning pin, 12. First positioning ring, 13. Second positioning ring, 14. First rotating shaft, 15. Second rotating shaft, 16. Third rotating shaft, 17. Sliding hole, 18. Limiting platform, 19. Locking sleeve, 20. Ratchet, 21. Upper arm, 22. Rotating shaft, 23. Connecting pin, 24. Lower arm, 25. Positioning protrusion, 26. Anti-reverse claw, 27. Slot, 28. Connecting head. Detailed Implementation

[0047] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0048] Example 1

[0049] like Figures 1 to 13 As shown, a switchable correction tape according to the first aspect embodiment of the present invention includes a housing, a first transmission wheel 3, a second transmission wheel 5, a sliding button 7, an anti-rotation arm 8, a nozzle 9, and a protective cover 10. The housing is transparent. The first transmission wheel 3 and the second transmission wheel 5 are both rotatably disposed in the housing and are connected to each other for transmission. A fixing ring 4 is provided on one side of the first transmission wheel 3, and a retraction wheel 6 is provided on one side of the second transmission wheel 5. The retraction wheel 6 and the second transmission wheel 5 are an integral structure.

[0050] The anti-rotation arm 8 is installed inside the housing, such as Figure 11 and Figure 12 As shown, the anti-rotation arm 8 includes an upper arm 21, a lower arm 24, a rotating shaft 22, and a connecting column 23. The upper arm 21, lower arm 24, rotating shaft 22, and connecting column 23 are an integral structure. The upper arm 21 and lower arm 24 are arranged parallel to each other, and the lower arm 24 is an elastic element. One end of the upper arm 21 and one end of the lower arm 24 are connected to the rotating shaft 22, and a groove 27 is provided between the upper arm 21 and the lower arm 24. The end of the upper arm 21 facing away from the rotating shaft 22 is provided with a backstop pawl 26, and the second transmission wheel 5 faces away from the rotating shaft 22. A ratchet 20 is provided on one side of the recovery wheel 6, and a backstop pawl 26 is engaged in the tooth groove of the ratchet 20; a limiting platform 18 is provided inside the housing, and the end of the lower arm 24 facing away from the rotating shaft 22 abuts against the limiting platform 18; one end of the connecting column 23 is connected to the rotating shaft 22, and the upper arm 21, lower arm 24 and connecting column 23 are all arranged in a direction perpendicular to the rotating shaft 22. The upper arm 21 and lower arm 24 have the same orientation, and the connecting column 23 has the opposite orientation to the upper arm 21. The rotating shaft 22 is rotatably connected to the housing.

[0051] The housing is provided with a sliding hole 17, which is an elongated hole. The sliding hole 17 is set directly opposite the slot 27. The sliding button 7 is slidably set in the sliding hole 17. The sliding button 7 is snapped into the housing. One side of the sliding button 7 is located outside the housing, and the other side of the sliding button 7 is located inside the housing. The sliding button 7 can slide into or out of the slot 27 during the sliding along the sliding hole 17.

[0052] One end of the nozzle 9 is connected to the end of the connecting post 23 that is away from the rotating shaft 22, and the other end of the nozzle 9 extends to the outside of the housing; the belt core is set on the fixing ring 4, the belt core on the fixing ring 4 is an unused belt core, and the belt core is wound around the take-up wheel 6 after passing around the nozzle 9, and the take-up wheel 6 is used to take up the used belt core;

[0053] like Figures 2 to 5 As shown, the protective cover 10 is set outside the housing. One side of the protective cover 10 is hinged to the housing, and the protective cover 10 is fastened to the nozzle 9. The part of the housing where the protective cover 10 is located is an arc-shaped surface, which allows the protective cover to open and close with a certain degree of elasticity, making it convenient to open and close the protective cover 10. By setting the protective cover 10, the nozzle 9 can be protected. At the same time, the protective cover 10 is hinged to the housing, so there is no risk of loss.

[0054] In this embodiment, it should be noted that the lower arm 24 is provided with a positioning protrusion 25 at the end away from the rotation shaft 22. The positioning protrusion 25 abuts against the limiting platform 18. The positioning protrusion 25 is used to provide positioning support for the lower arm 24. The end with the nozzle 9 is provided with a connector 28. The connector 28 is engaged with the end of the connecting post 23 away from the rotation shaft 22.

[0055] The technical effect achieved in this embodiment is as follows: When the sliding button 7 is located outside the slot 27, and the nozzle 9 is pressed down for correction, the nozzle 9 drives the rotating shaft 22 to rotate. During the rotation of the rotating shaft 22, the lower arm 24 is pressed down, causing it to deform to a certain extent, and the end of the upper arm 21 that is away from the rotating shaft 22 moves down, so that the anti-reverse pawl 26 is disengaged from the ratchet 20. During use, when the second transmission wheel 5 rotates, the anti-reverse pawl 26 and the ratchet 20 do not contact each other and no sound is made, which is a silent mode. After use, the anti-rotation arm 8 can automatically return to its original position under the action of the elastic force of the lower arm 24. When the sliding button 7 is located inside the slot 27, and the nozzle 9 is pressed down for correction, the upper arm 21 cannot be blocked by the sliding button 7. During operation, the anti-reverse pawl 26 remains engaged in the tooth groove of the ratchet 20. When the second transmission wheel 5 rotates, the anti-reverse pawl 26 and the ratchet 20 are in continuous contact, producing a clicking sound – this is the audible mode. When the corrector belt is not in use and is not under stress, the belt nozzle 9 resets due to the elasticity of the lower arm 24 of the anti-rotation arm 8. The tooth grooves of the anti-reverse pawl 26 and the ratchet 20 also reset, providing a clamping force that prevents the belt core from loosening due to external force. During operation, the belt nozzle 9 can swing up and down within a range of +15° to -15°. During operation, the silent mode and the audible mode can be quickly switched by sliding the slider 7. The operation is simple, meets various needs, is more versatile, and has a wider range of applications.

[0056] Example 2

[0057] like Figures 1 to 13As shown, this embodiment provides another switchable correction band, the structure of which includes all the contents of Embodiment 1. Only the different parts are described below.

[0058] In this embodiment, the ratchet 20 is coaxial with the second transmission wheel 5. The ratchet 20 is an internal gear and is embedded in the second transmission wheel 5, making the overall structure more compact and effectively reducing the volume.

[0059] In this embodiment, it should be noted that both the first transmission wheel 3 and the second transmission wheel 5 are gears, the first transmission wheel 3 and the second transmission wheel 5 mesh with each other, and the diameter of the first transmission wheel 3 is larger than the diameter of the second transmission wheel 5.

[0060] The technical effect achieved by this embodiment is that the use of gear transmission results in more stable transmission performance, which can effectively ensure stable use.

[0061] Example 3

[0062] like Figures 1 to 13 As shown, this embodiment provides another switchable correction band, the structure of which includes all the contents of Embodiment 1. Only the different parts are described below.

[0063] In this embodiment, the housing includes a first housing 1 and a second housing 2, which are detachably connected. Specifically, the first housing 1 and the second housing 2 are snap-fitted together.

[0064] In this embodiment, it should be noted that the inner side of the first housing 1 is provided with a positioning post 11, a first positioning ring 12 and a second positioning ring 13, and the positioning post 11, the first positioning ring 12 and the second positioning ring 13 are arranged sequentially along the length direction of the first housing 1.

[0065] The inner side of the second housing 2 is provided with a first rotating shaft 14, a second rotating shaft 15 and a third rotating shaft 16, which are arranged sequentially along the length of the second housing 2; a sliding hole 17 is provided on the second housing 2, and the sliding hole 17 is located between the second rotating shaft 15 and the third rotating shaft 16; a limiting platform 18 is provided inside the second housing 2, and the sliding hole 17 is located above the limiting platform 18;

[0066] The first rotating shaft 14, the second rotating shaft 15, and the third rotating shaft 16 are respectively set to the positioning post 11, the first positioning ring 12, and the second positioning ring 13. The first rotating shaft 14, the second rotating shaft 15, and the third rotating shaft 16 are all cylindrical. The positioning post 11 can be inserted into the end of the first rotating shaft 14, and the end of the third rotating shaft 16 can be inserted into the second positioning ring 13.

[0067] Furthermore, the first transmission wheel 3 is rotatably mounted on the first rotating shaft 14, the second transmission wheel 5 is rotatably mounted on the second rotating shaft 15, and the rotating shaft 22 is rotatably mounted on the third rotating shaft 16;

[0068] A locking sleeve 19 is provided on one side of the first transmission wheel 3. The locking sleeve 19 is coaxially arranged with the first transmission wheel 3. The fixing ring 4 is snapped onto the locking sleeve 19. The locking sleeve 19 is used to install the fixing ring 4 on the first rotating shaft 14.

[0069] The technical effects achieved by this embodiment are as follows: the housing includes a first housing 1 and a second housing 2, which facilitates quick positioning and assembly, has a simple overall structure, and a low product failure rate.

[0070] Although the present invention has been described in detail above with general descriptions and specific embodiments, some modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

[0071] The terms such as "upper," "lower," "left," "right," and "middle" used in this specification are merely for clarity of description and are not intended to limit the scope of implementation of this utility model. Any changes or adjustments to their relative relationships, without substantially altering the technical content, shall also be considered within the scope of implementation of this utility model.

Claims

1. A switchable correction band, characterized in that, It includes a housing, a first drive wheel (3), a second drive wheel (5), a sliding button (7), an anti-rotation arm (8), a spout (9), and a protective cover (10). The first drive wheel (3) and the second drive wheel (5) are rotatably disposed in the housing, and the first drive wheel (3) and the second drive wheel (5) are connected to each other for transmission. A fixing ring (4) is provided on one side of the first drive wheel (3), and a recycling wheel (6) is provided on one side of the second drive wheel (5). The anti-rotation arm (8) is disposed inside the housing. The anti-rotation arm (8) includes an upper arm (21), a lower arm (24), a rotating shaft (22), and a connecting column (23). One end of the upper arm (21) and one end of the lower arm (24) are connected to the rotating shaft (22), and a slot (27) is provided between the upper arm (21) and the lower arm (24). The end of the upper arm (21) facing away from the rotating shaft (22) is provided with a backstop claw (26). The second transmission wheel (5) faces away from the recovery wheel (6). A ratchet (20) is provided on the side, and the anti-reverse pawl (26) is engaged in the tooth groove of the ratchet (20); a limiting platform (18) is provided inside the housing, and the end of the lower arm (24) away from the rotating shaft (22) abuts against the limiting platform (18); one end of the connecting column (23) is connected to the rotating shaft (22), and the upper arm (21), the lower arm (24) and the connecting column (23) are all arranged in a direction perpendicular to the rotating shaft (22), and the rotating shaft (22) is rotatably connected to the housing; The housing is provided with a sliding hole (17), the sliding hole (17) is set directly opposite the slot (27), the sliding button (7) is slidably disposed in the sliding hole (17), and the sliding button (7) can slide into or out of the slot (27) during the sliding process along the sliding hole (17); One end of the nozzle (9) is connected to the end of the connecting post (23) away from the rotating shaft (22), and the other end of the nozzle (9) extends to the outside of the housing; The protective cover (10) is disposed outside the housing, one side of the protective cover (10) is hinged to the housing, and the protective cover (10) is fastened to the spout (9).

2. The switchable correction band according to claim 1, characterized in that, The lower arm (24) is provided with a positioning protrusion (25) at one end away from the rotating shaft (22), and the positioning protrusion (25) abuts against the limiting platform (18).

3. The switchable correction band according to claim 1, characterized in that, One end of the nozzle (9) is provided with a connector (28), and the connector (28) is engaged with the end of the connecting post (23) that is away from the rotating shaft (22).

4. The switchable correction band according to claim 1, characterized in that, The ratchet (20) is coaxial with the second transmission wheel (5), the ratchet (20) is an internal gear, and the ratchet (20) is embedded in the second transmission wheel (5).

5. A switchable correction band according to claim 1, characterized in that, Both the first transmission wheel (3) and the second transmission wheel (5) are gears. The first transmission wheel (3) and the second transmission wheel (5) mesh with each other, and the diameter of the first transmission wheel (3) is larger than the diameter of the second transmission wheel (5).

6. A switchable correction band according to claim 1, characterized in that, The housing includes a first housing (1) and a second housing (2), which are detachably connected.

7. A switchable correction band according to claim 6, characterized in that, The inner side of the first housing (1) is provided with a positioning post (11), a first positioning ring (12) and a second positioning ring (13), and the positioning post (11), the first positioning ring (12) and the second positioning ring (13) are arranged sequentially along the length direction of the first housing (1); The inner side of the second housing (2) is provided with a first rotating shaft (14), a second rotating shaft (15) and a third rotating shaft (16), the first rotating shaft (14), the second rotating shaft (15) and the third rotating shaft (16) are arranged sequentially along the length direction of the second housing (2); the sliding hole (17) is provided on the second housing (2), the sliding hole (17) is located between the second rotating shaft (15) and the third rotating shaft (16); the limiting platform (18) is provided inside the second housing (2), the sliding hole (17) is located above the limiting platform (18); The first rotating shaft (14), the second rotating shaft (15) and the third rotating shaft (16) are respectively configured to correspond one-to-one with the positioning post (11), the first positioning ring (12) and the second positioning ring (13).

8. A switchable correction band according to claim 7, characterized in that, The first transmission wheel (3) is rotatably mounted on the first rotating shaft (14), the second transmission wheel (5) is rotatably mounted on the second rotating shaft (15), and the rotating shaft (22) is rotatably mounted on the third rotating shaft (16).

9. A switchable correction band according to claim 8, characterized in that, A locking sleeve (19) is provided on one side of the first transmission wheel (3). The locking sleeve (19) is coaxially arranged with the first transmission wheel (3), and the fixing ring (4) is snapped onto the locking sleeve (19).

10. A switchable correction band according to claim 1, characterized in that, The shell is transparent.

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