Side adjustment mechanism for tooth spacing of blade set, and trimming device

Abstract

A side adjustment mechanism for the tooth spacing of a blade set, and a trimming device. The side 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 spring, the handle spring is sleeved in an inner hole of the handle bracket, an annular protrusion is provided in the first through hole, and the handle bracket abuts against the annular protrusion.

Description

Side adjustment mechanism for blade tooth spacing and trimming device Technical Field

[0001] This utility model relates to the field of trimming device technology, specifically to a side adjustment mechanism for the tooth spacing of a cutting head and a trimming device. Background Technology

[0002] Hair trimming devices, including electric clippers, are essential tools for hairdressing. To adapt to different cutting situations, the distance between the upper and lower blades needs to be adjusted. Existing electric clippers generally have an adjustment mechanism that allows for adjustment of the distance between the upper and lower blades, thereby controlling the amount and length of the cut.

[0003] Chinese patent CN220261075U discloses an electric clipper head with adjustable distance between the tips of the moving and fixed blades, relating to the field of electric clipper head technology. This electric clipper head with adjustable distance between the tips of the moving and fixed blades includes a fixed blade. A protective shell is provided on the top surface of the fixed blade. A spring bracket is provided on one side of the middle of the top surface of the protective shell. An adjusting frame is movably connected to the bottom surface of the protective shell, located on one side of the spring bracket, via a pivot pin. The adjusting frame is movably connected to a lever on one side of the top surface of the adjusting frame and a lever on one side of the bottom surface of the spring bracket. The adjusting frame is used to move the spring bracket back and forth during rotation. A moving blade is provided on the top surface of the fixed blade, located at its serrated end. A moving blade seat is provided on the top surface of the moving blade.

[0004] The adjustment mechanism used in the existing technology does not make the gear adjustment obvious when adjusting the tooth gap between the two blades, and people cannot perceive whether it has slid into place. Its protection of the adjustment key is also relatively poor when frequently switching between shaving positions.

[0005] Utility Model Content

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

[0007] According to the present invention, a side adjustment mechanism for the tooth spacing of a cutter head includes an upper blade, a lower blade, a housing, and an adjustment assembly. 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 sleeved inside the inner hole of the handle bracket. An annular protrusion is provided in the first through hole, and the handle bracket 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 a helical spring, and the two ends of the helical spring are respectively connected to the two ends of the handle bracket.

[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 side adjustment mechanism for the tooth spacing of the blade.

[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 bracket abuts against the adjustment handle. When the adjustment handle is rotated, the annular protrusion of the handle bracket and the adjustment handle engage with each other. The contact friction between the adjustment handle and the handle bracket is small, resulting in less wear and a longer service life for the adjustment handle.

[0022] 2. This utility model sets up a handle bracket and a handle spring. The handle spring is sleeved in the inner hole of the handle bracket. When the adjustment handle is rotated, the handle bracket and the annular protrusion of the adjustment handle engage with each other. The handle spring is compressed and provides elastic force to make the handle bracket jump up and down. The engagement produces 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, by setting a handle bracket and a handle spring, with the handle spring sleeved in the inner hole of the handle bracket, provides clear feedback on the gear position when adjusting the blade. Because the handle bracket 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 provided in 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 handle bracket 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. Attached Figure Description

[0026] 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:

[0027] Figure 1 is an exploded view of the side adjustment mechanism for the tooth spacing of the cutter head, which is the main feature of this utility model;

[0028] Figure 2 is a cross-sectional view of the side adjustment mechanism for the tooth spacing of the cutter head, which is the main feature of this utility model.

[0029] Figure 3 is a three-dimensional structural diagram of the side adjustment mechanism for the tooth spacing of the cutter head, which is the main feature of this utility model.

[0030] Figure 4 is a schematic diagram of the connection structure between the handle screw, the adjusting handle, and the bracket assembly, which are the main features of this utility model.

[0031] Figure 5 is a schematic diagram of the connection structure between the handle bracket and the adjustment handle, which are the main features of this utility model.

[0032] Figure 6 is a schematic diagram of the structure of the adjustment handle, which is the main feature of this utility model.

[0033] Figure 7 is a schematic diagram of the structure of the sliding plate, which is the main feature of this utility model.

[0034] In the diagram: 1. Blade head fixing screw; 7. Adjusting handle; 2. Lower blade; 701. Boss; 3. Upper blade; 702. Rod handle; 4. Guide block; 703. Rod head; 5. Sliding plate; 704. First through hole; 501. Second through hole; 8. Handle bracket; 502. Bayonet; 9. Handle spring; 6. Housing; 10. Handle screw. Detailed Implementation

[0035] 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.

[0036] As shown in Figures 1 to 4, a side adjustment mechanism for the tooth spacing of a cutting head 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 8 and a handle spring 9. The handle spring 9 is sleeved in the inner hole of the handle bracket 8. An annular protrusion is provided in the first through hole 704, and the handle bracket 8 abuts against the annular protrusion.

[0037] In this utility model, the handle spring 9 of the adjustment mechanism is sleeved in the inner hole of the handle bracket 8 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 8, 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 turned, the handle bracket 8 and the annular protrusion of the adjustment handle 7 engage with each other. The handle spring 9 is compressed, providing elastic force to make the handle bracket 8 jump up and down. The engagement produces 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.

[0038] The handle screw 10 passes through the handle spring 9, handle bracket 8, adjusting handle 7, and sliding plate 5, and locks into the housing 6. The handle screw 10 engages with the inner hole of the handle bracket 8, preventing the handle bracket 8 from rotating, allowing it to move only up and down. By rotating the handle screw 10, it unscrews, and the bracket assembly disengages from the adjusting handle 7. The number of gears can be changed by adjusting the angle of the handle bracket 8 within the first through hole 704.

[0039] Specifically, the adjusting handle 7 also includes a handle 702, which is integrally connected or fastened to the handle head 703. As shown in Figures 6 and 7, a boss 701 is provided on the side wall of the handle 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 handle 702, the handle head 703 is driven to rotate. The handle 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.

[0040] Specifically, the support assembly includes a handle bracket 8 and a handle spring 9, with the handle spring 9 fitted inside the inner hole of the handle bracket 8. The handle spring 9 includes a helical spring, with its two ends connected to the two ends of the handle bracket 8, respectively. The handle bracket 8 includes a square bracket, and one end of the handle screw 10, which engages with the handle bracket 8, 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 8 and the square end of the handle screw 10 restricts the rotation of the support assembly relative to the handle screw 10.

[0041] 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.

[0042] This utility model discloses a side-mounted adjustment mechanism for the blade tooth spacing. By redesigning the side-mounted adjustment mechanism that drives the blade movement, the tooth spacing of the blade can be adjusted. The adjustment mechanism includes a sliding plate 5, an adjustment handle 7, a handle bracket 8, a handle spring 9, and a handle screw 10. The handle spring 9 is fitted inside the inner hole of the handle bracket 8 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 8, preventing the handle bracket 8 from rotating. When the adjustment handle 7 is rotated, the handle bracket 8 and the annular protrusion of the adjustment handle 7 mesh together. The handle spring 9 is compressed, providing elasticity and causing the handle bracket 8 to bounce up and down. The meshing produces a 'click' sound, with one click indicating a shift in gear. This achieves a gear feedback adjustment method, providing the user with a clearer adjustment signal. The blade head adjustment provides clear feedback on the gear position, and the handle bracket 8 cannot rotate. When the adjustment handle 7 is moved, it rotates; when the adjustment handle 7 is stopped, it will not rotate on its own due to the contact between the handle bracket 8 and the adjustment handle 7, thus having 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 utility model's side adjustment mechanism achieves a low-cost, more reliable, and feedback-based gear pitch adjustment method. Furthermore, the handle bracket 8 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 8.

[0043] 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.

[0044] This utility model also provides a trimming device, including the aforementioned blade tooth spacing adjustment mechanism. The trimming tools of this utility model are not limited to electric clippers, hair trimmers, etc.

[0045] 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.

[0046] 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 side adjustment mechanism for the tooth spacing of a cutting head, characterized in that, It 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 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 (8) and a handle spring (9). The handle spring (9) is sleeved in the inner hole of the handle bracket (8). An annular protrusion is provided in the first through hole (704). The handle bracket (8) abuts against the annular protrusion.

2. The side adjustment mechanism for the tooth spacing of the cutter head 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 side adjustment mechanism for the tooth spacing of the cutter head as described in claim 1, characterized in that, The handle bracket (8) includes a square bracket, and one end of the handle screw (10) that is engaged with the handle bracket (8) includes a square end, the outer surface of which matches the square inner hole surface of the square bracket.

4. The side adjustment mechanism for the tooth spacing of the cutter head as described in claim 1, characterized in that, The handle spring (9) includes a helical spring, the two ends of which are respectively connected to the two ends of the handle bracket (8).

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

7. The side adjustment mechanism for the tooth spacing of the cutter head as described in claim 1, 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 side adjustment mechanism for the tooth spacing of the cutter head as described in claim 1, 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 side adjustment mechanism for the tooth spacing of the cutter head 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 side adjustment mechanism includes any one of claims 1 to 9.

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