Adjustment mechanism for tooth spacing of blade set, and trimming device

Abstract

An adjustment mechanism for the tooth spacing of a blade set, and a trimming device. The adjustment mechanism comprises an upper blade, a lower blade, a housing and an adjustment assembly, wherein the upper blade and the lower blade are each directly or indirectly mounted on the housing. The adjustment assembly comprises a sliding plate, an adjustment handle, a bracket assembly and a handle screw, wherein the adjustment handle comprises a rod head provided with a first through hole; one end of the handle screw passes through the first through hole and then passes through a second through hole on one side of the sliding plate, and the other end of the handle screw is engaged with the bracket assembly; the bracket assembly abuts against the first through hole; the rod head is connected to the sliding plate and is configured to drive the sliding plate to move; the sliding plate is directly or indirectly connected to the upper blade or the lower blade; and the bracket assembly comprises a handle bracket and a handle elastic piece, the handle elastic piece is inserted onto the handle bracket, the handle bracket is engaged with the handle screw, an annular protrusion is provided in the first through hole, and the handle elastic piece abuts against the annular protrusion.

Description

Cutter tooth spacing adjustment mechanism and trimming device Technical Field

[0001] This utility model relates to the field of pruning device technology, specifically to a blade tooth spacing adjustment mechanism and a pruning device. Background Technology

[0002] Currently, hair trimming devices such as electric clippers commonly used in the market have two main types of adjustments: stepless adjustment and adjustment with speed feedback.

[0003] A Chinese patent with publication number CN217530916U discloses an electric clipper scissor distance side adjustment device, belonging to the field of beauty and hair care electrical appliance technology. The device includes a main body, a head cover fixedly connected to the left side of the main body, a blade assembly arranged on the side of the head cover, a gear box fixedly connected to the side of the main body, a transmission component arranged on the side of the gear box, an adjustment key arranged on the side of the transmission component, a push rod arranged on the side of the main body, a track groove formed on the surface of the head cover, a track protrusion arranged within the track groove, the adjustment key abutting against the track groove, and a main cover disposed at the lower end of the head cover.

[0004] The electric hair clippers with adjustable settings in the existing technology can produce a crisp and pleasant sound when adjusting the tooth spacing between the blades through the side adjustment structure, allowing people to perceive whether the setting has been adjusted. It also has a setting self-locking function. However, the protection of the adjustment key is relatively poor when frequently switching between shaving positions, and it is also costly for manufacturers.

[0005] Utility Model Content

[0006] In view of the deficiencies in the prior art, the purpose of this utility model is to provide a blade tooth spacing adjustment mechanism and a trimming device.

[0007] According to the present invention, a blade tooth spacing adjustment mechanism includes an upper blade, a lower blade, a housing, and an adjustment component, wherein the upper blade and the lower blade are respectively directly or indirectly mounted on the housing;

[0008] The adjustment assembly includes a sliding plate, an adjustment handle, a bracket assembly, and a handle screw. The adjustment handle includes a rod head with a first through hole. One end of the handle screw passes through the first through hole and then through a second through hole on one side of the sliding plate. The other end of the handle screw is engaged with the bracket assembly. The bracket assembly abuts against the first through hole. The rod head is connected to the sliding plate and drives the sliding plate to move. The sliding plate is directly or indirectly connected to the upper blade or the lower blade.

[0009] The bracket assembly includes a handle bracket and a handle spring. The handle spring is inserted into the handle bracket, and the handle bracket is secured with a handle screw. An annular protrusion is provided in the first through hole, and the handle spring abuts against the annular protrusion.

[0010] Preferably, a boss is provided on the side wall of the rod head facing the sliding plate, and a latch is also provided on one side of the sliding plate. The latch is connected to the second through hole, and the boss is engaged with the latch.

[0011] Preferably, the handle bracket includes a square bracket, and one end of the handle screw that engages with the handle bracket includes a square end, the outer surface of which matches the square inner hole surface of the square bracket.

[0012] Preferably, the handle spring includes an arc-shaped spring, and grooves are respectively provided on the two side walls of the handle bracket, with the two ends of the arc-shaped spring inserted into the grooves respectively.

[0013] Preferably, the upper blade is fastened to the housing, the housing is provided with a sliding groove, the lower blade is connected to the slider plate, and the slider plate is installed in the sliding groove.

[0014] Preferably, the lower blade is fixed to the sliding plate by a blade head fixing screw.

[0015] Preferably, a guide block is also fastened to the lower blade, and the lower blade, guide block, and sliding plate are connected in sequence;

[0016] The bottom surface of the chute is provided with a guide slot hole, and the guide block matches the guide slot hole.

[0017] Preferably, a compression spring is provided on the sliding plate, and when the housing is assembled with the upper blade, the compression spring contacts the upper blade and is in a compressed state.

[0018] Preferably, the adjusting handle further includes a handle, which is integrally connected to or fastened to the handle head.

[0019] This utility model also provides a trimming device, including a blade tooth spacing adjustment mechanism.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. This utility model restricts the rotation of the handle bracket by setting a handle screw. The handle bracket will not rotate with the rotation of the adjustment handle. The handle spring contacts the adjustment handle. When the adjustment handle is rotated, the contact friction between the adjustment handle and the handle spring is small, resulting in less wear and a longer service life of the adjustment handle.

[0022] 2. This utility model sets up a handle spring. The annular boss of the adjustment handle squeezes the handle spring, causing the handle spring to deform slightly. The handle spring rebounds and hits the adjustment handle, producing a 'click' sound. One click indicates that a gear has been switched, realizing a gear feedback adjustment method, which can give the user a clearer adjustment signal.

[0023] 3. This utility model provides clear feedback on the gear position when adjusting the blade by setting a handle spring to abut against the adjusting handle. Because the handle spring abuts against the adjusting handle, the adjusting handle will not rotate on its own, thus having a self-locking function.

[0024] 4. The adjustment mechanism of this utility model includes a sliding plate, an adjustment handle, a handle screw, a handle bracket, and a handle spring. It has low cost, better reliability, and realizes tooth pitch adjustment with feedback.

[0025] 5. This utility model allows the number of gears to be changed by rotating the handle screw, which unscrews the handle screw and causes the bracket assembly to detach from the adjustment handle. The angle of the handle bracket within the first through hole can be adjusted to change the number of gears.

[0026] Attached Figure Description

[0027] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0028] Figure 1 is an exploded view of the main feature of this utility model: the tooth spacing adjustment mechanism.

[0029] Figure 2 is a cross-sectional view of the main feature of this utility model: the tooth spacing adjustment mechanism.

[0030] Figure 3 is a three-dimensional structural diagram of the main component of this utility model, namely the tooth spacing adjustment mechanism;

[0031] Figure 4 is a structural schematic diagram of the main feature of this utility model: the tooth spacing adjustment mechanism.

[0032] Figure 5 is a schematic diagram of the structure of the adjustment handle, which is the main feature of this utility model.

[0033] Figure 6 is a schematic diagram of the structure of the sliding plate, which is the main feature of this utility model.

[0034] In the picture:

[0035] Cutter head fixing screw 1 Adjusting handle 7

[0036] Lower blade 2, boss 701

[0037] Upper blade 3, shank 702

[0038] Guide block 4, rod head 703

[0039] Sliding plate 5 First through hole 704

[0040] Second through hole 501 Handle bracket 9

[0041] 502 bayonet, handle spring 8

[0042] 6 housing screws, 10 handle screws Detailed Implementation

[0043] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the present invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0044] As shown in Figures 1 to 4, a blade tooth spacing adjustment mechanism according to this utility model includes an upper blade 3, a lower blade 2, a housing 6, and an adjustment assembly. The upper blade 3 and the lower blade 2 are directly or indirectly mounted on the housing 6. Specifically, the adjustment assembly includes a sliding plate 5, an adjustment handle 7, a bracket assembly, and a handle screw 10. The adjustment handle 7 includes a rod head 703 with a first through hole 704. One end of the handle screw 10 passes through the first through hole 704 and then through a second through hole 501 on one side of the sliding plate 5. The other end of the handle screw 10 is engaged with the bracket assembly, which abuts against the first through hole 704. The rod head 703 is connected to the sliding plate 5 and drives the sliding plate to move. The sliding plate 5 is directly or indirectly connected to the upper blade 3 or the lower blade 2. More specifically, the bracket assembly includes a handle bracket 9 and a handle spring 8. The handle spring 8 is inserted into the handle bracket 9, and the handle bracket 9 engages with the handle screw 10. An annular protrusion is provided in the first through hole 704, and the handle spring 8 abuts against the annular protrusion.

[0045] In this utility model, the handle spring 8 of the adjustment mechanism is inserted into the handle bracket 9 to form a bracket assembly. One end of the handle screw 10 passes through the bracket assembly and then enters the second through hole 501 of the sliding plate 5. The shape of the other end of the handle screw 10 matches the inner hole plane of the handle bracket 9, so that the other end of the handle screw 10 is engaged with the bracket assembly. The bracket assembly cannot rotate relative to the handle screw 10. The bracket assembly with the matched handle screw 10 is abutted against the first through hole 704 of the rod head 703 of the adjustment handle 7. The connection between the adjustment handle 7 and the sliding plate 5 is realized through the handle screw 10. Then the rod head 703 is connected to the sliding plate 5 and can drive the sliding plate 5 to move. When the adjustment handle 7 is rotated, the annular protrusion of the adjustment handle 7 presses the handle spring 8, causing the handle spring 8 to deform slightly. The handle spring 8 rebounds and hits the adjustment handle 7, producing a 'click' sound. One click indicates that a gear has been switched. At the same time, due to the limiting of the bracket assembly by the handle screw 10, the bracket assembly does not rotate with the rotation of the adjustment handle 7, reducing the friction between the bracket assembly and the adjustment handle 7. This results in less wear and a longer lifespan for the adjustment handle 7.

[0046] By rotating the handle screw 10, the handle screw 10 is unscrewed, and the bracket assembly is disengaged from the adjusting handle 7 as the handle screw 10 is unscrewed. The number of gears can be changed by adjusting the angle of the handle bracket 9 within the first through hole 704.

[0047] Specifically, the adjusting handle 7 also includes a rod handle 702, which is integrally connected or fastened to the rod head 703. As shown in Figures 5 and 6, a boss 701 is provided on the side wall of the rod head 703 facing the sliding plate 5, and a latch 502 is also provided on one side of the sliding plate 5. The latch 502 is connected to the second through hole 501, and the boss 701 is engaged with the latch 502. Since the handle screw 10 passes through the second through hole 501, and the latch 502 is connected to the second through hole 501, the boss 701 is inserted into the latch 502 position of the sliding plate 5. By moving the rod handle 702, the rod head 703 is driven to rotate. The rod head 703 rotates around the handle screw 10, driving the boss 701 to move. The boss 701 and the latch 502 cooperate to push the sliding plate 5 to move along the sliding groove of the housing 6. The sliding plate 5 drives the upper blade 3 or the lower blade 2 to move back and forth, thereby realizing the adjustment of the back and forth position of the upper blade 3 and the lower blade 2, and realizing the adjustment of the blade tooth spacing.

[0048] Specifically, the support assembly includes a handle bracket 9 and a handle spring 8. The handle spring 8 includes an arc-shaped spring. Grooves are provided on both side walls of the handle bracket 9, and the two ends of the arc-shaped spring are inserted into the grooves. The handle bracket 9 includes a square bracket, and one end of the handle screw 10 that engages with the handle bracket 9 includes a square end. The outer surface of the square end matches the square inner hole surface of the square bracket. The engagement between the square inner hole of the handle bracket 9 and the square end of the handle screw 10 restricts the rotation of the support assembly relative to the handle screw 10.

[0049] Specifically, the upper blade 3 is fastened to the housing 6, and a compression spring is provided on the sliding plate 5. When the housing 6 and the upper blade 3 are assembled, the compression spring contacts the upper blade 3 and is in a compressed state. The compression spring prevents the sliding plate 5 from moving in the front-back direction, thus affecting the adjustment stability. The housing 6 is provided with a sliding groove, and the lower blade 2 is connected to the slider plate, which is installed in the sliding groove. The lower blade 2 is fixed to the sliding plate 5 by the blade head fixing screw 1. A guide block 4 is also fastened to the lower blade 2. The lower blade 2, guide block 4, and sliding plate 5 are connected in sequence. A guide slot hole is provided on the bottom surface of the sliding groove, and the guide block 4 matches the guide slot hole. By pushing the sliding plate 5 to move, the guide block 4 is driven to move. The guide block 4 slides along the guide slot hole, realizing the stability of the front-back movement of the lower blade 2.

[0050] This utility model discloses a blade tooth spacing adjustment mechanism. By redesigning the adjustment mechanism that drives the blade movement, the tooth spacing of the blade is adjusted. The adjustment mechanism includes a sliding plate 5, an adjustment handle 7, a handle bracket 9, a handle spring 8, and a handle screw 10. The handle spring 8 is inserted into the grooves on both sides of the handle bracket 9 to form a bracket assembly. The handle screw 10 passes through this assembly, and its square end engages with the square inner hole of the handle bracket 9, preventing the handle bracket 9 from rotating. When the adjustment handle 7 is rotated, the annular protrusion of the adjustment handle 7 presses against the handle spring 8, causing it to deform slightly. The handle spring 8 rebounds and strikes the adjustment handle 7, producing a 'click' sound. One click indicates a gear shift, thus providing the user with a gear feedback adjustment method and a clearer adjustment signal. The blade head adjustment provides clear feedback on the gear position, and the handle bracket 9 cannot rotate. When the adjustment handle 7 is moved, it rotates; when it stops moving, the handle spring 8 prevents it from rotating on its own, providing a self-locking function. The adjustment handle 7 experiences minimal wear and has a long lifespan, meeting the requirements of normal use for 3 years. This invention's adjustment mechanism achieves a low-cost, more reliable, and feedback-based gear pitch adjustment method. Furthermore, the handle bracket 9 can be detached from the adjustment handle 7 by unscrewing the handle screw 10, and the number of gear positions can be changed by adjusting the angle of the handle bracket 9.

[0051] The present invention moves the sliding plate 5 by providing a boss 701 on the inner wall of the side of the adjusting handle 7 facing the sliding plate 5. The boss 701 cooperates with the slot 502 of the sliding plate 5. As the adjusting handle 7 rotates, the boss 703 rotates around the handle screw 10, and the boss 701 rotates along the axis of the handle screw 10, pushing the sliding plate 5 to move back and forth in the sliding groove of the housing 6 with the lower blade 2, thereby realizing the adjustment of the blade tooth spacing.

[0052] This utility model also provides a trimming device, including the aforementioned blade tooth spacing adjustment mechanism. The trimming device of this utility model is not limited to electric clippers, hair trimmers, etc.

[0053] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", 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 this application and simplifying the description, and do not indicate or imply that the device or element 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 this application.

[0054] The specific embodiments of this utility model have been described above. It should be understood that this utility model is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the substantive content of this utility model. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A tool tooth pitch adjustment mechanism, characterized in that, include: The upper blade (3), the lower blade (2), the housing (6), and the adjustment assembly are provided, wherein the upper blade (3) and the lower blade (2) are respectively directly or indirectly mounted on the housing (6); The adjustment assembly includes a sliding plate (5), an adjustment handle (7), a bracket assembly, and a handle screw (10). The adjustment handle (7) includes a rod head (703) with a first through hole (704). One end of the handle screw (10) passes through the first through hole (704) and then through a second through hole (501) on one side of the sliding plate (5). The other end of the handle screw (10) is engaged with the bracket assembly. The bracket assembly abuts against the first through hole (704). The rod head (703) is connected to the sliding plate (5) and drives the sliding plate to move. The sliding plate (5) is directly or indirectly connected to the upper blade (3) or the lower blade (2). The bracket assembly includes a handle bracket (9) and a handle spring (8). The handle spring (8) is inserted into the handle bracket (9). The handle bracket (9) is engaged with a handle screw (10). An annular protrusion is provided in the first through hole (704). The handle spring (8) abuts against the annular protrusion.

2. The cutter tooth pitch adjustment mechanism as described in claim 1, characterized in that, A boss (701) is provided on the side wall of the rod head (703) facing the sliding plate (5), and a slot (502) is also provided on one side of the sliding plate (5). The slot (502) is connected to the second through hole (501), and the boss (701) is engaged with the slot (502).

3. The cutter tooth pitch adjustment mechanism as described in claim 1, characterized in that, The handle bracket (9) includes a square bracket, and one end of the handle screw (10) that is engaged with the handle bracket (9) includes a square end, the outer surface of which matches the square inner hole surface of the square bracket.

4. The cutter tooth pitch adjustment mechanism as described in claim 1, characterized in that, The handle spring (8) includes an arc-shaped spring, and grooves are respectively provided on the two side walls of the handle bracket (9), and the two ends of the arc-shaped spring are respectively inserted into the grooves.

5. The cutter tooth pitch adjustment mechanism as described in claim 1, characterized in that, The upper blade (3) is fastened to the housing (6), the housing (6) is provided with a sliding groove, the lower blade (2) is connected to the slider plate, and the slider plate is installed in the sliding groove.

6. The cutter tooth pitch adjustment mechanism as described in claim 5, characterized in that, The lower blade (2) is fixed to the sliding plate (5) by the blade head fixing screw (1).

7. The cutter tooth pitch adjustment mechanism as described in claim 6, characterized in that, A guide block (4) is also fastened to the lower blade (2), and the lower blade (2), guide block (4), and sliding plate (5) are connected in sequence; The bottom surface of the chute is provided with a guide slot hole, and the guide block (4) matches the guide slot hole.

8. The cutter tooth pitch adjustment mechanism as described in claim 5, characterized in that, A compression spring is provided on the sliding plate (5). When the housing (6) is assembled with the upper blade (3), the compression spring contacts the upper blade (3) and is in a compressed state.

9. The cutter tooth pitch adjustment mechanism as described in claim 1, characterized in that, The adjustment handle (7) also includes a rod handle (702), which is integrally connected or fastened to the rod head (703).

10. A pruning device, characterized in that, The tool tooth pitch adjustment mechanism includes any one of claims 1 to 9.

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