Gear shifting device

Abstract

The utility model discloses a gear shifting device, and relates to the technical field of hair clippers. A gear shifting device comprises a shell, a mounting column is rotationally arranged on the shell, a mounting sleeve is arranged on the mounting column, and a connecting column is eccentrically arranged on the mounting sleeve; a mounting plate is further arranged on the shell in a sliding mode, the mounting plate is used for being connected with a tool bit, a matching groove is formed in the mounting plate, the connecting column is inserted into the matching groove, and the mounting sleeve is used for driving the connecting column to rotate around the axis of the mounting sleeve so as to drive the mounting plate to move in a reciprocating mode; a limiting assembly is arranged on the mounting sleeve and used for enabling the mounting sleeve to move to any position to be limited so that the mounting plate can move to any position to be limited. The tool bit on the hair clipper can stretch out and draw back.

Description

Technical Field

[0001] The present application relates to the field of hair clippers, and in particular to a gear adjustment device. Background Art

[0002] A hair clipper is a tool for trimming and modifying hair. Electric hair clippers, also known as electric clippers, are commonly used in barbershops. This electric hair clipper includes two rows of overlapping blades. When in use, one row of blades is stationary while the other row of blades can move back and forth. The blades are retractable. The user presses the hair clipper on the head and presses a switch to make the two rows of blades move back and forth to cut the hair. In modern society, different people have different haircut needs. Different lengths of hair are usually required to be cut for different positions to create a satisfactory hairstyle. It is not convenient for a barber to manually control the cutting position of the hair clipper. Designing a hair clipper that can control the extension and retraction of the blades to change the haircut position is an urgent problem to be solved. Utility Model Content

[0003] In order to enable the cutting head on the hair clipper to be retractable, the present application provides a gear adjustment device.

[0004] The present application provides a gear adjustment device that adopts the following technical solution:

[0005] A gear shifting device comprises a shell, on which a mounting column is rotatably provided, on which a mounting sleeve is provided, and on which a connecting column is eccentrically provided; a mounting plate is also slidably provided on the shell, the mounting plate is used to be connected to a cutter head, a matching groove is provided on the mounting plate, the connecting column is inserted into the matching groove, the mounting sleeve is used to drive the connecting column to rotate around the axis of the mounting sleeve, thereby driving the mounting plate to reciprocate; a limiting assembly is provided on the mounting sleeve, the limiting assembly is used to limit the mounting sleeve when it moves to any position, thereby limiting the mounting plate when it moves to any position.

[0006] By adopting the above technical solution, the mounting column can be driven to rotate by rotating the mounting sleeve. Since the connecting column is eccentrically arranged, the connecting column will rotate around the axial position of the mounting column, thereby driving the mounting plate to move back and forth, and then the cutter head to move back and forth, that is, to achieve the extension and retraction of the cutter head; the limiting component can limit the position of the mounting sleeve so that the mounting sleeve can remain stationary at any position and then the mounting plate can remain stationary at any position.

[0007] In a specific possible implementation scheme, the limit assembly includes a first connecting ring fixedly mounted on the shell, the first connecting ring is provided with a first matching tooth group, the inner wall of the mounting sleeve is provided with a second connecting ring capable of rotating synchronously with the mounting sleeve, the mounting sleeve and the second connecting ring are slidably connected, and one end of the second connecting ring close to the first matching tooth group is provided with a second matching tooth group for meshing with the first matching tooth group; a spring is provided between the second connecting ring and the mounting sleeve, one end of the spring is connected to one end of the second connecting ring away from the first mounting ring, and the other end of the spring is connected to the inner wall of the mounting sleeve;

[0008] When the installation sleeve is rotated to any position, the spring provides the second mating tooth set with a thrust toward the first mating tooth set, and at this time, the first mating tooth set is meshed with the second mating tooth set to limit the position of the installation sleeve.

[0009] By adopting the above technical solution, when the installation sleeve rotates to any position, the second connecting ring will also rotate synchronously to drive the second matching tooth group to rotate. Under the action of the spring, no matter which position the second matching tooth group rotates to, the first matching tooth group and the second matching tooth group will mesh and abut against each other, so that the position of the installation sleeve is restricted. When the second matching tooth group rotates, due to the action of the spring, the first matching tooth group and the second matching tooth group that keep abutting against each other will make a clicking sound, and this sound will prompt how many degrees the installation sleeve has rotated.

[0010] In a specific possible implementation scheme, a convex ridge is provided on the inner wall of the installation sleeve along the axial direction of the installation column, and a groove is provided on the outer wall of the second connecting ring, and the convex ridge is slidably clamped in the groove.

[0011] In a specific possible implementation manner, the spring is provided in plurality, and the plurality of springs are evenly distributed along the circumferential direction of the mounting column.

[0012] By adopting the above technical solution, multiple springs can provide relatively uniform thrust.

[0013] In a specific implementation manner, a notch is formed on the second connecting ring, and the connecting column is located in the notch.

[0014] By adopting the above technical solution, the overall installation size can be reduced.

[0015] In a specific feasible implementation scheme, a convex strip is provided on the inner wall of the mounting sleeve, and the convex strip is arranged along the axial direction of the mounting column. A clamping groove is provided on the outer wall of the mounting column, and the convex strip is slidably clamped in the clamping groove; a mounting hole is provided at the end of the mounting column, and a screw is inserted into the mounting hole. The end of the screw extends outside the mounting hole and is threadedly connected with a nut, and the screw is used to axially limit the mounting sleeve.

[0016] By adopting the above technical solution, the nut installed with the screw can axially limit the installation sleeve so that the installation sleeve will not slide and separate from the installation column.

[0017] In a specific possible implementation manner, the mounting sleeve is also provided with a handle.

[0018] By adopting the above technical solution, the handle can assist in rotating the mounting sleeve.

[0019] In a specific possible implementation manner, the mounting sleeve, the handle and the connecting column are an integrated piece.

[0020] By adopting the above technical solution, the integrated installation sleeve, handle and connecting column have good structural strength.

[0021] In summary, the present application includes at least one of the following beneficial technical effects:

[0022] 1. The mounting column can be driven to rotate by rotating the mounting sleeve. Since the connecting column is eccentrically arranged, the connecting column will rotate around the axis of the mounting column, thereby driving the mounting plate to move back and forth, and then the cutter head to move back and forth, that is, the cutter head can be extended and retracted; the limit assembly can limit the position of the mounting sleeve so that the mounting sleeve can remain stationary at any position, and then the mounting plate can remain stationary at any position;

[0023] 2. When the installation sleeve rotates to any position, the second connecting ring will also rotate synchronously and drive the second matching tooth group to rotate. Under the action of the spring, no matter which position the second matching tooth group rotates to, the first matching tooth group and the second matching tooth group will mesh and abut against each other, so that the position of the installation sleeve is restricted. When the second matching tooth group rotates, due to the action of the spring, the first matching tooth group and the second matching tooth group that keep abutting against each other will make a clicking sound, and this sound will indicate how many degrees the installation sleeve has rotated. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of a gear shifting device according to an embodiment of the present application.

[0025] Figure 2 It is a cross-sectional view used to show the installation column.

[0026] Figure 3 It is a schematic diagram used to reflect the structure of the installation plate.

[0027] Figure 4 It is an exploded view used to show the limit component.

[0028] Figure 5 It is a structural diagram used to reflect the limit component.

[0029] Figure 6It is a structural diagram used to reflect the gap.

[0030] Explanation of the reference numerals: 1. Shell; 11. Card slot; 2. Mounting column; 21. Card slot; 22. Mounting hole; 3. Mounting sleeve; 31. Connecting column; 32. Raised strip; 33. Handle; 4. Mounting plate; 41. Matching slot; 5. Screw; 6. Limiting assembly; 61. First connecting ring; 611. First matching tooth group; 62. Second connecting ring; 621. Second matching tooth group; 622. Groove; 623. Notch; 63. Spring; 7. Raised ridge. DETAILED DESCRIPTION

[0031] The present application is further described in detail below in conjunction with the accompanying drawings.

[0032] The embodiment of the present application discloses a gear adjustment device for controlling the extension and retraction of a cutter head.

[0033] Reference Figure 1 and Figure 2 A gear shifting device includes a shell 1, a mounting column 2 is rotatably provided on the shell 1, a mounting sleeve 3 is coaxially sleeved on the mounting column 2, the mounting sleeve 3 can rotate synchronously with the mounting column 2, and a connecting column 31 is eccentrically provided on the mounting sleeve 3.

[0034] Rotating the mounting post 2 can drive the mounting sleeve 3 to rotate synchronously, thereby driving the connecting post 31 to rotate around the axis of the mounting post 2 .

[0035] Reference Figure 2 and Figure 3 The housing 1 is provided with a mounting plate 4 which is slidably mounted thereon. The housing 1 is provided with a slot 11 in which the mounting plate 4 is slidably mounted. The mounting plate 4 is used to be connected to the cutter head. The mounting plate 4 is provided with a matching slot 41 in which the connecting column 31 is inserted. The connecting column 31 can move and rotate in the matching slot 41. Specifically, the length of the matching slot 41 is slightly greater than the diameter of the connecting column 31, and the slot width of the matching slot 41 is equal to the diameter of the connecting column 31.

[0036] Since the connecting column 31 is inserted into the matching groove 41 , the rotation of the connecting column 31 causes the mounting plate 4 to reciprocate and thus the cutter head to reciprocate.

[0037] Reference Figure 4 The inner wall of the mounting sleeve 3 is provided with a convex strip 32, which is arranged along the axial direction of the mounting column 2. The outer wall of the mounting column 2 is provided with a clamping groove 21, and the convex strip 32 is slidably clamped in the clamping groove 21. The mounting sleeve 3 and the mounting column 2 are synchronously rotated by the cooperation between the convex strip 32 and the clamping groove 21; the end of the mounting column 2 is provided with a through mounting hole 22, combined with Figure 3A screw 5 is inserted into the mounting hole 22, and the left end of the screw 5 extends outside the mounting hole 22 and is threadedly connected with a nut. The screw 5 and the nut are used to axially limit the mounting sleeve 3. In this embodiment, the mounting column 2 and the nut can only rotate relative to the housing 1 and cannot move, and the nut is clamped on the housing 1. The nut part of the screw 5 limits the mounting sleeve 3.

[0038] Reference Figure 3 and Figure 4 In order to facilitate the rotation of the installation sleeve 3, a handle 33 is further provided on the installation sleeve 3, and in order to increase the structural strength, the installation sleeve 3, the handle 33 and the connecting column 31 are integrated.

[0039] Reference Figure 3 and Figure 4 When the mounting plate 4 reaches a certain position, if the mounting plate 4 moves, that is, the cutter head moves, it will be inconvenient for the user to use. In order to facilitate the user's operation, a limit assembly 6 is provided on the mounting sleeve. The limit assembly 6 is used to allow the mounting sleeve 3 to move to any position and be limited, thereby allowing the mounting plate 4 to move to any position and be limited, thereby making the cutter head immobile.

[0040] Reference Figure 5 The limiting assembly 6 includes a first connecting ring 61 fixed on the housing 1, the first connecting ring 61 is provided with a first matching tooth set 611, and the inner wall of the mounting sleeve 3 is provided with a second connecting ring 62 that can rotate synchronously with the mounting sleeve 3. Figure 4 The mounting sleeve 3 and the second connecting ring 62 are slidably connected, and the second connecting ring 62 is provided with a second matching tooth group 621 for engaging with the first matching tooth group 611 at one end close to the first matching tooth group 611; three springs 63 are provided between the second connecting ring 62 and the mounting sleeve 3, and the three springs 63 are evenly distributed along the circumferential direction of the mounting column 2, one end of each spring 63 is connected to the end of the second connecting ring 62 away from the first mounting ring, and the other end of each spring 63 is connected to the inner wall of the mounting sleeve 3.

[0041] When the installation sleeve 3 rotates to any position, the second connecting ring 62 will also rotate synchronously to drive the second matching tooth set 621 to rotate. Under the action of the spring 63, no matter which position the second matching tooth set 621 rotates to, the spring 63 will provide the second matching tooth set 621 with a thrust toward the first matching tooth set 611, and the first matching tooth set 611 and the second matching tooth set 621 will mesh and resist each other, so that the position of the installation sleeve 3 is restricted.

[0042] In addition, when the second mating tooth set 621 rotates, due to the action of the spring 63, the first mating tooth set 611 and the second mating tooth set 621 that remain against each other will make a clicking sound, and this sound will prompt the user how many degrees the installation sleeve 3 has rotated for the convenience of use.

[0043] Reference Figure 6 Specifically, a convex ridge 7 is provided on the inner wall of the mounting sleeve 3 along its own axial direction, and a groove 622 is provided on the outer wall of the second connecting ring 62 , and the convex ridge 7 is slidably clamped in the groove 622 .

[0044] Reference Figure 6 In order to reduce the overall size, a notch 623 is formed on the second connecting ring 62 , and the connecting column 31 is located in the notch 623 .

[0045] The implementation principle of a gear shifting device in an embodiment of the present application is as follows: rotating the mounting sleeve 3 drives the mounting column 2 to rotate. Since the connecting column 31 is eccentrically arranged, the connecting column 31 will rotate around the axial position of the mounting column 2, thereby driving the mounting plate 4 to move back and forth, and then the cutter head to move back and forth, that is, to achieve the extension and retraction of the cutter head; in addition, after the mounting sleeve 3 reaches any position, the second connecting ring 62 will also rotate synchronously to drive the second mating tooth group 621 to rotate. Under the action of the spring 63, no matter which position the second mating tooth group 621 rotates to, the spring 63 will provide the second mating tooth group 621 with a thrust toward the first mating tooth group 611, and the first mating tooth group 611 and the second mating tooth group 621 will mesh and resist each other, so that the position of the mounting sleeve 3 is restricted.

[0046] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A gear adjustment device, Features: The invention comprises a shell (1), wherein a mounting column (2) is rotatably arranged on the shell (1), a mounting sleeve (3) is arranged on the mounting column (2), and a connecting column (31) is eccentrically arranged on the mounting sleeve (3); a mounting plate (4) is also slidably arranged on the shell (1), the mounting plate (4) is used to be connected with a cutter head, a matching groove (41) is formed on the mounting plate (4), the connecting column (31) is inserted into the matching groove (41), the mounting sleeve (3) is used to drive the connecting column (31) to rotate around the axis of the mounting sleeve (3), thereby driving the mounting plate (4) to reciprocate; a limiting assembly (6) is arranged on the mounting sleeve (3), and the limiting assembly (6) is used to enable the mounting sleeve (3) to move to any position to be limited, thereby enabling the mounting plate (4) to move to any position to be limited.

2. A gear shifting device according to claim 1, Features: The limiting assembly (6) comprises a first connecting ring (61) fixed on the housing (1), the first connecting ring (61) being provided with a first matching tooth group (611), the inner wall of the mounting sleeve (3) being provided with a second connecting ring (62) capable of rotating synchronously with the mounting sleeve (3), the mounting sleeve (3) and the second connecting ring (62) being slidably connected, the end of the second connecting ring (62) close to the first matching tooth group (611) being provided with a second matching tooth group (621) for meshing with the first matching tooth group (611); a spring (63) being provided between the second connecting ring (62) and the mounting sleeve (3), one end of the spring (63) being connected to an end of the second connecting ring (62) away from the first mounting ring, and the other end of the spring (63) being connected to the inner wall of the mounting sleeve (3); When the installation sleeve (3) is rotated to any position, the spring (63) provides the second mating tooth set (621) with a thrust toward the first mating tooth set (611), and at this time, the first mating tooth set (611) and the second mating tooth set (621) are meshed to limit the position of the installation sleeve (3).

3. A gear shifting device according to claim 2, Features: A convex ridge (7) is provided on the inner wall of the mounting sleeve (3) along the axial direction of the mounting column (2), and a groove (622) is provided on the outer wall of the second connecting ring (62), and the convex ridge (7) is slidably locked in the groove (622).

4. A gear shifting device according to claim 2, Features: The spring (63) is provided in plurality, and the plurality of springs (63) are evenly distributed along the circumferential direction of the mounting column (2).

5. A gear shifting device according to claim 2, Features: The second connecting ring (62) is provided with a notch (623), and the connecting column (31) is located in the notch (623).

6. A gear shifting device according to claim 1, Features: The inner wall of the mounting sleeve (3) is provided with a convex strip (32), and the convex strip (32) is arranged along the axial direction of the mounting column (2). The outer wall of the mounting column (2) is provided with a clamping groove (21), and the convex strip (32) is slidably clamped in the clamping groove (21); the end of the mounting column (2) is provided with a mounting hole (22), and a screw (5) is inserted into the mounting hole (22). The end of the screw (5) extends to the outside of the mounting hole (22) and is threadedly connected with a nut. The screw (5) is used to axially limit the mounting sleeve (3).

7. A gear shifting device according to claim 1, Features: The mounting sleeve (3) is also provided with a handle (33).

8. A gear shifting device according to claim 7, Features: The mounting sleeve (3), the handle (33) and the connecting column (31) are an integrated part.

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