A tool bit unlocking structure

Abstract

This invention discloses a blade unlocking structure, including a blade fixing bracket and a blade assembly detachably mounted on the blade fixing bracket, as well as an elastic pressure plate, a driving block, and an unlocking linkage device. The elastic pressure plate has a clamping end for locking the blade assembly, and the blade assembly is locked to the blade fixing bracket via the clamping end. The unlocking linkage device includes an operating component that can slide linearly relative to the blade fixing bracket and a transmission component that is linked with the operating component. The transmission component is in transmission cooperation with the driving block. The driving block is provided with a spring-loaded pushing part for pushing the elastic pressure plate to disengage the clamping end from the blade assembly, and a blade-loaded pushing part for pushing the blade assembly outward. This invention can achieve the technical effects of improving safety, preventing accidental touches, facilitating operation, and increasing automation.

Description

Technical Field

[0001] This invention relates to the field of electric hair clipper technology, and more specifically to a blade unlocking structure. Background Technology

[0002] In personal care appliances such as electric hair clippers and stylists, the blade assembly is typically detachably mounted to the main body via a spring-loaded locking mechanism for easy cleaning, replacement, or maintenance. To achieve quick assembly and disassembly, current technology generally employs a design with a spring-loaded pressure plate and a manual unlocking mechanism: the blade assembly is normally pressed into a fixed bracket by the spring-loaded pressure plate, and the user must apply external force to overcome the spring force to release the lock. However, this type of structure presents several safety hazards and operational defects in actual use.

[0003] For example, in the prior art, a hair clipper with a flexible locking mechanism for assembling and disassembling the blade head (publication number CN103144121B) locks the blade head by engaging a locking mechanism with a guide bevel, and unlocks it using a pressure plate and a spring. Another example is an electric hair clipper with a blade head locking mechanism that automatically ejects the blade head; pressing the blade head lock button disengages the locking mechanism, thus releasing the blade head. Both of these designs require the user to manually push the blade head body to unlock, which greatly increases the risk of cuts.

[0004] Currently, the mainstream buttonless blade unlocking structure on the market, even after subsequent improvements to achieve button unlocking, still suffers from the following problems: the normal operating direction of the button (such as pushing forward or pressing down) highly overlaps with the movement direction of the device during normal use and the direction that is prone to impact when held. This type of button unlocking structure is prone to unintentional accidental operation, which can lead to accidental loosening of the blade and pose a serious safety hazard. In addition, the unlocking structure lacks a self-locking function. After unlocking, the elastic pressure plate immediately rebounds, and users need to use the traditional method of overcoming the elasticity of the plate for installation. This method has high resistance and is difficult to install, or users must continuously press the operating part to complete disassembly and reassembly, which is cumbersome, has a poor user experience, low automation, and affects usage efficiency. Therefore, this invention proposes a blade unlocking structure. Summary of the Invention

[0005] The purpose of this invention is to provide a blade unlocking structure that can solve the technical problems in the background art, such as the risk of cutting hands during blade unlocking operation, accidental loosening of the blade due to accidental touch, and inability to self-lock after unlocking. It achieves the technical effects of improving safety, preventing accidental touch, ease of operation, and automation.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A blade unlocking structure includes a blade fixing bracket and a blade assembly detachably mounted on the blade fixing bracket; It also includes an elastic pressure plate, a drive block, and an unlocking linkage device; The elastic pressure plate has a clamping end for locking the cutter head assembly, and the cutter head assembly is locked to the cutter head fixing bracket via the clamping end; The unlocking linkage device includes an operating component that can slide linearly relative to the cutter head fixing bracket and a transmission component that is linked with the operating component. The transmission component is in transmission cooperation with the drive block to convert the linear sliding action of the operating component into the unlocking action of the drive block. The drive block is provided with a spring-loaded pusher for pushing the elastic pressure plate to disengage the clamping end from the cutter head assembly, and a cutter head pusher for pushing the cutter head assembly outward. When the operating component drives the transmission component to slide, the transmission component drives the driving block to move, causing the spring plate pushing part to push the elastic pressure plate to release the locking of the cutter head assembly, and causing the cutter head pushing part to push the cutter head assembly outward.

[0007] Furthermore, the operating component is an operating button, the transmission component is a transmission plate, and the operating button and the transmission plate are fixedly connected to form a synchronous translation pair.

[0008] Furthermore, the transmission plate is provided with a button fixing hole and a drive connection hole. The bottom of the operation button is fixed to the button fixing hole by a snap-fit ​​structure. The drive block is provided with a connecting part that extends into the drive connection hole. The transmission plate cooperates with the connecting part through the drive connection hole to drive the drive block.

[0009] Furthermore, the drive block is rotatably mounted on the cutter head fixing bracket, and the transmission component cooperates with the drive block to convert the linear sliding motion of the operating component into the rotational motion of the drive block about its own rotation axis.

[0010] Furthermore, the cutter head fixing bracket is provided with a placement groove and mounting grooves located on both sides of the placement groove, and the drive block is provided with a coaxially arranged rotating shaft or shaft block on both sides, and the rotating shaft or shaft block is locked in the corresponding mounting groove.

[0011] Furthermore, the drive block is integrally formed with an adjustment part, a spring push block, and a cutter push block. The adjustment part is embedded in the drive connection hole of the transmission plate, the spring push block constitutes the spring push part, and the cutter push block constitutes the cutter push part.

[0012] Furthermore, the elastic pressure plate includes a fixed end, a pressing end, and a hollow clearance space located between the fixed end and the pressing end, and the adjustment part passes through the hollow clearance space and is embedded in the drive connection hole.

[0013] Furthermore, the elastic pressure plate has an inclined plate on the side of the hollowed-out clearance space, and the driving block also has a self-locking block. When the driving block rotates to the unlocked holding position, the self-locking block abuts against the lower end of the inclined plate to limit the movement, so as to keep the pressing end in a state of being disengaged from the cutter head assembly.

[0014] Furthermore, when the cutter head assembly is reinstalled into the cutter head fixing bracket, the cutter head assembly pushes against the cutter head push block and drives the drive block to rotate in the opposite direction, so that the self-locking block disengages from the inclined plate, and the elastic pressure plate rebounds and relocks the cutter head assembly.

[0015] Furthermore, the inclined plate is disposed on both sides of the hollowed-out clearance space, and the self-locking block is provided with a self-locking support surface for abutting against the lower end of the inclined plate.

[0016] Furthermore, the drive block includes a crank block and a slider. The crank block is rotatably disposed in the placement groove of the cutter head fixing bracket. The slider is confined within the placement groove and can slide linearly back and forth. The crank block and the slider abut against each other for transmission, so that the slider forms a spring-loaded pushing part and a cutter head pushing part.

[0017] Furthermore, the crank block has a top end, an arc-shaped end, and a tail end, and the slider has a head, an arc-shaped part, a tail, and a U-shaped part. The arc-shaped part guides and fits against the arc-shaped end, and the tail abuts and drives against the tail end. The head is used to push the elastic pressure plate, and the U-shaped part is used to push the cutter head assembly.

[0018] Furthermore, the drive block is integrally formed with a top block, a spring connecting block, a side block, and a shaft block. The spring connecting block forms a spring pushing part, the side block forms a cutter head pushing part, and the shaft block is rotatably assembled into the mounting groove of the cutter head fixing bracket.

[0019] Furthermore, the pressing end of the elastic pressure plate is provided with a connecting groove with a push plate, the spring plate connecting block passes through the connecting groove and is pushed and engaged with the push plate, and a self-locking groove is formed on the spring plate connecting block to match the lower end of the push plate to form a self-locking mechanism.

[0020] Furthermore, the clamping end is provided with a V-shaped pressure head, and the cutter head assembly is provided with a stationary cutter bracket with a fixed limiting part. The V-shaped pressure head and the fixed limiting part cooperate to lock the cutter head assembly in normal operation.

[0021] Furthermore, the fixed limiting part has an inner groove structure, the cutter head fixing bracket has a fixing groove, and through grooves are opened on both sides of the fixing groove. The two ends of the V-shaped pressure head press against the fixed limiting part through the through grooves.

[0022] Furthermore, the operating component is disposed on the machine body, and the sliding direction of the operating component is opposite to the forward direction of the blade assembly when the hair clipper is in operation.

[0023] Beneficial effects: This invention features a rear-mounted, horizontally sliding operation button that slides from front to back, completely opposite to the forward movement of the entire device during normal use. This prevents reverse triggering during handheld operation, impacts, or drops, effectively avoiding accidental unlocking and significantly reducing the false trigger rate. Unlocking is achieved simply by pushing the operation button backward, which drives the elastic pressure plate of the drive block, eliminating the risk of hand injury by eliminating contact with the blade and greatly improving safety. In the preferred self-locking embodiment, the drive block integrates a spring-loaded push block, a self-locking block, and a blade push block. The device integrates multiple functions. After unlocking, the self-locking block engages with the lower end of the inclined plate of the elastic pressure plate to achieve mechanical self-locking at the dead point, keeping the elastic pressure plate open. This avoids the defect of traditional structures where the plate springs back when released, making disassembly smoother and less strenuous. When the cutter head assembly is reinstalled, the stationary cutter bracket pushes the cutter head push block to rotate the drive block in the opposite direction. The self-locking block disengages from the inclined plate, and the elastic pressure plate automatically springs back to its original position. The V-shaped pressure head then re-presses and fixes the limiting part, achieving a complete closed-loop mechanical linkage of "pushing back to unlock - self-locking retention - pressing to install the cutter - unlocking the self-lock - automatic locking". There is no need to manually reset the button, making operation more convenient. Attached Figure Description

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0025] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention; Figure 2 This is a schematic diagram of the exploded structure of Embodiment 1 of the present invention; Figure 3 This is a schematic diagram of the driving block structure according to Embodiment 1 of the present invention; Figure 4 This is a top view of the structure of Embodiment 1 of the present invention; Figure 5 For the present invention Figure 4 Schematic diagram of the cross-sectional structure of the AA in locked and unlocked states; Figure 6 For the present invention Figure 4 Schematic diagram of the cross-sectional structure of the BB in locked and unlocked states; Figure 7 This is a schematic diagram of the locked state structure of the cutter head assembly, elastic pressure plate, and drive block according to Embodiment 1 of the present invention; Figure 8 This is a schematic diagram of the unlocked state structure of the cutter head assembly, elastic pressure plate, and drive block according to Embodiment 1 of the present invention; Figure 9 This is a schematic diagram of the structure of Embodiment 2 of the present invention; Figure 10 This is a schematic diagram of the structure for removing the cutter head fixing bracket in Embodiment 2 of the present invention; Figure 11This is a schematic diagram of the driving block structure in Embodiment 2 of the present invention; Figure 12 This is a top view of the structure of Embodiment 2 of the present invention; Figure 13 For the present invention Figure 12 Schematic diagram of the AA section structure; Figure 14 This is a schematic diagram of the structure of Embodiment 3 of the present invention; Figure 15 This is a schematic diagram of the structure for removing the cutter head fixing bracket in Embodiment 3 of the present invention; Figure 16 This is a schematic diagram of the driving block and elastic pressure plate structure in Embodiment 3 of the present invention; Figure 17 This is a top view of the structure of Embodiment 3 of the present invention; Figure 18 For the present invention Figure 17 Schematic diagram of the AA section structure.

[0026] Reference numerals: 1. Cutter head fixing bracket; 2. Cutter head assembly; 3. Stationary cutter bracket; 301. Fixing limit part; 4. Drive block; 5. Transmission plate; 501. Drive connection hole; 502. Button fixing hole; 6. Elastic pressure plate; 7. Hollowed-out clearance space; 8. Inclined plate; 9. Operation button; 10. Fixing groove; 11. Placement groove; 12. Mounting groove; 13. Positioning groove; 14. Through groove; 15. Adjustment part; 16. Self-locking 17. Spring-loaded push block; 18. Rotating shaft; 19. Clamping end; 20. Fixed end; 21. Cutter head push block; 22. Slider; 23. Arc-shaped part; 24. Tail end; 25. Head; 26. U-shaped part; 27. Crank block; 28. Arc-shaped end; 29. ​​Tail end; 30. Top end; 31. Connecting groove; 32. Top block; 33. Spring-loaded connecting block; 34. Shaft block; 35. Side block; 36. Push plate; 37. Self-locking groove. Detailed Implementation Example

[0027] like Figures 1 to 8As shown, this embodiment, based on the unlocking and ejection functions implemented in Embodiments 2 and 3, further incorporates an unlocking retention structure and an easy-reinstallation and reset structure for the cutter head. Specifically, this embodiment includes a cutter head unlocking structure comprising a cutter head assembly 2, a cutter head fixing bracket 1, an elastic pressure plate 6, a driving block 4, and an unlocking linkage device. The cutter head assembly 2 has a stationary cutter bracket 3, with an integrally formed fixed limiting portion 301 with an internal groove structure at the end of the stationary cutter bracket 3 furthest from the cutter teeth. The elastic pressure plate 6 is made of metal stamping spring sheet and includes a fixed end 20, a pressing end 19 with a V-shaped pressure head, and a hollow clearance space 7 with an inclined plate 8. The fixed end 20 is fitted into the positioning groove 13 of the cutter head fixing bracket 1, with the V-shaped pressure head positioned above the fixing groove 10. Under normal conditions, the two ends of the V-shaped pressure head press against the upper surface of the fixed limiting portion 301 through the through grooves 14 on both sides of the fixing groove 10 to lock the cutter head assembly 2.

[0028] The unlocking linkage device includes an operation button 9 and a transmission plate 5. The operation button 9 and the transmission plate 5 are fixedly connected to form a synchronous translation pair. One end of the transmission plate 5 has a button fixing hole 502, and the other end has a drive connection hole 501. The bottom of the operation button 9 is fixed to the button fixing hole 502 by a snap-fit ​​structure.

[0029] The cutter head fixing bracket 1 has a fixing groove 10, a placement groove 11, a coaxial mounting groove 12, and a positioning groove 13. The fixing groove 10 has a concave structure with through grooves 14 on both sides. The mounting groove 12 is located on both sides of the placement groove 11 and communicates with the placement groove 11. The drive block 4 is set in the placement groove 11, and has integrally formed rotating shafts 18 on both sides. The rotating shafts 18 are engaged in the mounting groove 12, so that the drive block 4 can rotate around the axis of the mounting groove 12.

[0030] The drive block 4 is integrally formed with a self-locking block 16, a spring-loaded push block 17, a cutter head push block 21, and an adjustment part 15. The adjustment part 15 serves as a connecting part that cooperates with the transmission component, extending upward through the hollow clearance space 7 of the elastic pressure plate 6 and embedding into the drive connection hole 501 of the transmission plate 5. The spring-loaded push block 17 constitutes a spring-loaded push part for pushing the elastic pressure plate 6; the cutter head push block 21 constitutes a cutter head push part for pushing the cutter head assembly 2; and the self-locking block 16 is used to abut and limit the movement against the inclined plate 8 of the elastic pressure plate 6.

[0031] When the operation button 9 slides linearly in a predetermined direction, it drives the transmission plate 5 to slide synchronously. The transmission plate 5 pulls or pushes the adjustment part 15 through the drive connection hole 501, causing the drive block 4 to rotate forward around the rotating shaft 18. During the forward rotation of the drive block 4, the spring plate pusher block 17 pushes the pressing end 19 of the elastic pressure plate 6 upward, causing the pressing end 19 to undergo elastic deformation. The V-shaped pressure head disengages from the fixed limit part 301, and the locking relationship of the cutter head assembly 2 is released. At the same time, the cutter head pusher block 21 pushes the stationary cutter bracket 3 outward, causing the cutter head assembly 2 to move outward relative to the cutter head fixed bracket 1 by a certain stroke, forming a separation gap that facilitates removal.

[0032] Simultaneously, the self-locking block 16 moves along the inclined plate 8, further lifting the elastic pressure plate 6 until the self-locking block 16 abuts against the lower end of the inclined plate 8. The self-locking block 16 may be provided with a self-locking support surface, which is located on the rebound path of the elastic pressure plate 6, so as to prevent the pressing end 19 from falling back by abutting against the lower end of the inclined plate 8, thereby keeping the pressing end 19 in the state of being disengaged from the fixed limiting part 301. At this time, even if the user releases the operation button 9, the elastic pressure plate 6 can still remain in the unlocked state, making it convenient for the user to remove, clean or replace the cutter head assembly 2.

[0033] When the cutter head assembly 2 is reinstalled, the stationary cutter support 3 of the cutter head assembly 2 pushes the cutter head push block 21 inward, and the cutter head push block 21 drives the drive block 4 to rotate in the opposite direction around the rotating shaft 18. During the reverse rotation of the drive block 4, the self-locking block 16 disengages from the inclined plate 8, the elastic pressure plate 6 rebounds under its own elastic force, and the pressing end 19 presses down again, so that the V-shaped pressure head presses against the fixed limit part 301 again, thereby automatically completing the locking of the cutter head assembly 2. When the drive block 4 rotates in the opposite direction, the operation button 9 can also be reset through the adjustment part 15 and the transmission plate 5.

[0034] This embodiment achieves a mechanical linkage closed loop of "operation unlocking, cutter head ejection, unlocking retention, cutter head reinstallation triggering reverse reset, and elastic pressure plate automatically locking" through the cooperation between the self-locking block 16, the inclined plate 8, the cutter head push block 21, and the elastic pressure plate 6. Example

[0035] like Figures 9 to 13 As shown, this embodiment is a basic blade unlocking structure that can realize the unlocking and ejection functions of the blade. In this specific embodiment, a blade unlocking structure includes a blade assembly 2, a blade fixing bracket 1, an elastic pressure plate 6, a driving block 4, and an unlocking linkage device. The blade assembly 2 is locked and assembled in the blade fixing bracket 1 by the elastic pressure plate 6. The unlocking linkage device is driven by the driving block 4, so that the driving block 4 can push the elastic pressure plate 6 and disengage the elastic pressure plate 6 from the locked position, while simultaneously pushing the blade assembly 2 outward.

[0036] The cutter head assembly 2 is equipped with a stationary cutter support 3. The end of the stationary cutter support 3 away from the cutter teeth has an integrally formed fixed limiting part 301 with an internal groove structure. The elastic pressure plate 6 is made of metal stamping spring and includes a fixed end 20, a pressing end 19 with a V-shaped pressure head, and a hollow clearance space 7. The fixed end 20 of the elastic pressure plate 6 is bent and fixedly connected between the cutter head fixing bracket 1 and the machine body. The V-shaped pressure head is located above the fixing groove 10 of the cutter head fixing bracket 1. Under normal conditions, the two ends of the V-shaped pressure head press against the upper surface of the fixed limiting part 301 through the through grooves 14 on both sides of the fixing groove 10 to lock the cutter head assembly 2.

[0037] The unlocking linkage device includes an operation button 9 as an operating component and a transmission plate 5 as a transmission component. The operation button 9 and the transmission plate 5 are fixedly connected to form a synchronous translation pair. The transmission plate 5 is a long strip with a button fixing hole 502 at one end and a drive connection hole 501 at the other end. The bottom of the operation button 9 is fixed to the button fixing hole 502 by a snap-fit ​​structure.

[0038] In this embodiment, the drive block 4 includes a crank block 27 and a slider 22. The crank block 27 is rotatably disposed in the placement groove 11 of the cutter head fixing bracket 1, and the slider 22 is confined within the placement groove 11 and can slide linearly back and forth. The crank block 27 is integrally formed with a top end 30, an arc-shaped end 28, and a tail end 29; the slider 22 is integrally formed with a head 25, an arc-shaped portion 23, a tail 24, and a U-shaped portion 26. The arc-shaped portion 23 is guided and fitted with the arc-shaped end 28, and the tail 24 abuts and drives the tail end 29. The head 25 constitutes a spring-loaded push portion for lifting the elastic pressure plate 6, and the U-shaped portion 26 constitutes a cutter head push portion for pushing out the cutter head assembly 2. The top end 30 of the crank block 27 penetrates the hollow clearance space 7 of the elastic pressure plate 6 and is embedded in the drive connection hole 501 of the transmission plate 5.

[0039] When the operation button 9 drives the transmission plate 5 to slide linearly, the transmission plate 5 drives the crank block 27 to rotate through the drive connection hole 501. The crank block 27 drives the slider 22 to slide linearly through the guide fit between the arc-shaped end 28 and the arc-shaped part 23, and the abutment transmission between the tail end 29 and the tail part 24. The head 25 of the slider 22 pushes the pressing end 19 of the elastic pressure plate 6, causing the V-shaped pressure head to disengage from the fixed limiting part 301; at the same time, the U-shaped part 26 of the slider 22 pushes the stationary knife support 3, causing the knife head assembly 2 to move outward. Thus, in this embodiment, the unlocking action of the drive block 4 in the claim is achieved through the cooperation of the crank block 27 and the slider 22. Example

[0040] like Figures 14 to 18As shown, the main difference between this embodiment and Embodiment 2 is that the drive block 4 adopts an integrated rotating structure to reduce the number of separate parts and improve assembly convenience, and it can also achieve a self-locking function. In this specific embodiment, the basic locking relationship of the cutter head unlocking structure, the cutter head assembly 2, the cutter head fixing bracket 1, the elastic pressure plate 6, and the unlocking linkage device can be referred to Embodiment 1. The elastic pressure plate 6 includes a fixed end 20, a pressing end 19 with a V-shaped pressure head, a hollow clearance space 7, and a connecting groove 31 with a push plate 36 provided at the pressing end 19. The fixed end 20 is assembled into the positioning groove 13 of the cutter head fixing bracket 1, and the V-shaped pressure head is located above the fixed groove 10. Under normal conditions, the two ends of the V-shaped pressure head press against the upper surface of the fixed limiting part 301 through the through grooves 14 on both sides of the fixed groove 10 to lock the cutter head assembly 2.

[0041] The cutter head fixing bracket 1 has a fixing groove 10, a placement groove 11, and symmetrical mounting grooves 12. The drive block 4 is assembled in the placement groove 11. The drive block 4 has integrally formed shaft blocks 34 on both sides. The shaft blocks 34 are locked in the corresponding mounting grooves 12, so that the drive block 4 can rotate around the axis of the mounting groove 12. The drive block 4 has integrally formed a top block 32, a spring connecting block 33, symmetrical side blocks 35, and shaft blocks 34. Among them, the top block 32 constitutes a connecting part that cooperates with the transmission plate 5, the spring connecting block 33 constitutes a spring pushing part for lifting the elastic pressure plate 6, and the side blocks 35 constitute a cutter head pushing part for pushing out the cutter head assembly 2. A self-locking groove 37 is formed on the spring connecting block 33, which matches the lower end of the push plate 36 to form a self-locking mechanism.

[0042] The top block 32 passes through the hollow clearance space 7 of the elastic pressure plate 6 and is located at the drive connection hole 501 of the transmission plate 5. When the operation button 9 drives the transmission plate 5 to slide linearly, the transmission plate 5 drives the top block 32 to move through the drive connection hole 501, causing the drive block 4 to rotate in the forward direction around the shaft block 34. During the rotation of the drive block 4, the spring plate connecting block 33 passes through the connecting groove 31 and pushes against the push plate 36 to lift the pressing end 19 of the elastic pressure plate 6, causing the V-shaped pressure head to disengage from the fixed limit part 301. When the lower end of the push plate 36 is locked in the self-locking groove 37 of the spring plate connecting block 33, self-locking can be achieved; at the same time, the symmetrical side blocks 35 push the stationary knife support 3, causing the knife head assembly 2 to move outward.

[0043] During installation, the cutter head assembly 2 is installed into the cutter head fixing bracket 1. By applying inward pressure, the stationary cutter bracket 3 of the cutter head assembly 2 contacts the side block 35, achieving inward pushing. The side block 35 returns to its original position, and at the same time, the self-locking groove 37 of the drive block 4 overcomes the connection with the push plate 36, achieving the return of the drive block 4, thereby fixing the cutter head assembly 2.

[0044] Orientation and operating direction working principle: In the above embodiments, the operation button 9 can be located on the body of the device, and its sliding direction can be set to be opposite to the forward direction of the blade assembly 2 when the hair clipper is in operation. Specifically, when the hair clipper is in operation, the blade assembly 2 usually moves towards the direction of the hair to be trimmed, and the unlocking sliding direction of the operation button 9 can be set from the side of the blade teeth towards the tail end of the device. This direction setting can reduce the possibility of the operation button 9 being displaced during normal operation, grip friction, force on the front end of the device, or slight impact.

[0045] It should be understood that the above description is only a preferred embodiment of the present invention. For those skilled in the art, without departing from the concept of the present invention, equivalent substitutions or partial adjustments can be made to the operating component, transmission component, drive block, elastic pressure plate and their connection and cooperation method, as long as the drive block is still driven by the operating component and transmission component, and the elastic pressure plate is released from locking the cutter head assembly by the spring push part of the drive block, and the cutter head assembly is pushed outward by the cutter head push part, all of which should fall within the protection scope of the present invention.

Claims

1. A blade unlocking structure, comprising a blade fixing bracket (1) and a blade assembly (2) detachably mounted on the blade fixing bracket (1), characterized in that: It also includes an elastic pressure plate (6), a drive block (4), and an unlocking linkage device; The elastic pressure plate (6) has a clamping end (19) for locking the cutter head assembly (2), and the cutter head assembly (2) is locked to the cutter head fixing bracket (1) by the clamping end (19). The unlocking linkage device includes an operating component that can slide linearly relative to the blade fixing bracket (1) and a transmission component that is linked with the operating component. The transmission component is in transmission cooperation with the drive block (4) to convert the linear sliding action of the operating component into the unlocking action of the drive block (4). The drive block (4) is provided with a spring-loaded pusher for pushing the elastic pressure plate (6) to disengage the pressing end (19) from the cutter head assembly (2), and a cutter head pusher for pushing the cutter head assembly (2) outward. When the operating component drives the transmission component to slide, the transmission component drives the driving block (4) to move, so that the spring plate pusher pushes the elastic pressure plate (6) to release the locking of the cutter head assembly (2), and the cutter head pusher pushes the cutter head assembly (2) to move outward.

2. The blade unlocking structure according to claim 1, characterized in that, The operating component is an operating button (9), and the transmission component is a transmission plate (5). The operating button (9) and the transmission plate (5) are fixedly connected and form a synchronous translation pair.

3. The blade unlocking structure according to claim 2, characterized in that, The transmission plate (5) is provided with a button fixing hole (502) and a drive connection hole (501). The bottom of the operation button (9) is fixed to the button fixing hole (502) by a snap-fit ​​structure. The drive block (4) is provided with a connecting part that extends into the drive connection hole (501). The transmission plate (5) cooperates with the connecting part through the drive connection hole (501) to drive the drive block (4).

4. The blade unlocking structure according to claim 3, characterized in that, The drive block (4) is rotatably mounted on the cutter head fixing bracket (1), and the transmission component cooperates with the drive block (4) to convert the linear sliding motion of the operating component into the rotational motion of the drive block (4) around its own rotation axis.

5. The blade unlocking structure according to claim 4, characterized in that, The cutter head fixing bracket (1) is provided with a placement groove (11) and mounting grooves (12) located on both sides of the placement groove (11). The drive block (4) is provided with a coaxially arranged rotating shaft (18) or shaft block (34) on both sides. The rotating shaft (18) or shaft block (34) is locked in the corresponding mounting groove (12).

6. The blade unlocking structure according to claim 5, characterized in that, The drive block (4) is integrally formed and has an adjustment part (15), a spring push block (17) and a cutter push block (21). The adjustment part (15) is embedded in the drive connection hole (501) of the transmission plate (5). The spring push block (17) constitutes the spring push part, and the cutter push block (21) constitutes the cutter push part.

7. The blade unlocking structure according to claim 6, characterized in that, The elastic pressure plate (6) includes a fixed end (20), a pressing end (19), and a hollow clearance space (7) located between the fixed end (20) and the pressing end (19). The adjustment part (15) passes through the hollow clearance space (7) and is embedded in the drive connection hole (501).

8. The blade unlocking structure according to claim 7, characterized in that, The elastic pressure plate (6) has an inclined plate (8) on the side of the hollow clearance space (7). The driving block (4) also has a self-locking block (16). When the driving block (4) rotates to the unlocked holding position, the self-locking block (16) abuts against the lower end of the inclined plate (8) to keep the pressing end (19) in a state of being detached from the cutter head assembly (2).

9. The blade unlocking structure according to claim 8, characterized in that, When the cutter head assembly (2) is reinstalled into the cutter head fixing bracket (1), the cutter head assembly (2) pushes against the cutter head push block (21) and drives the drive block (4) to rotate in the opposite direction, so that the self-locking block (16) disengages from the inclined plate (8), and the elastic pressure plate (6) rebounds and relocks the cutter head assembly (2).

10. The blade unlocking structure according to claim 9, characterized in that, The inclined plate (8) is disposed on both sides of the hollowed-out clearance space (7), and the self-locking block (16) is provided with a self-locking support surface for abutting against the lower end of the inclined plate (8).

11. The blade unlocking structure according to claim 4, characterized in that, The drive block (4) includes a crank block (27) and a slider (22). The crank block (27) is rotatably disposed in the placement groove (11) of the cutter head fixing bracket (1). The slider (22) is limited to the placement groove (11) and can slide linearly back and forth. The crank block (27) and the slider (22) abut against each other for transmission, so that the slider (22) forms a spring push part and a cutter head push part.

12. The blade unlocking structure according to claim 11, characterized in that, The crank block (27) has a top end (30), an arc end (28) and a tail end (29). The slider (22) has a head (25), an arc part (23), a tail part (24) and a U-shaped part (26). The arc part (23) is guided and fitted with the arc end (28). The tail part (24) and the tail end (29) are in contact and driven. The head (25) is used to push the elastic pressure plate (6). The U-shaped part (26) is used to push the cutter head assembly (2).

13. The blade unlocking structure according to claim 6, characterized in that, The drive block (4) is integrally formed with a top block (32), a spring connecting block (33), a side block (35) and a shaft block (34). The spring connecting block (33) forms a spring pushing part, the side block (35) forms a cutter pushing part, and the shaft block (34) is rotatably assembled in the mounting groove (12) of the cutter fixing bracket (1).

14. The blade unlocking structure according to claim 13, characterized in that, The elastic pressure plate (6) has a connecting groove (31) with a push plate (36) at the pressing end (19). The spring plate connecting block (33) passes through the connecting groove (31) and pushes against the push plate (36). A self-locking groove (36) is formed on the spring plate connecting block (33) and matches the lower end of the push plate (36) to form a self-locking mechanism.

15. A blade unlocking structure according to any one of claims 1 to 14, characterized in that, The pressing end (19) is provided with a V-shaped pressure head, and the cutter head assembly (2) is provided with a stationary cutter bracket (3) with a fixed limiting part (301). The V-shaped pressure head and the fixed limiting part (301) cooperate to lock the cutter head assembly (2) in normal operation.

16. A blade unlocking structure according to claim 15, characterized in that, The fixed limiting part (301) has an inner groove structure. The cutter head fixing bracket (1) is provided with a fixing groove (10). Through grooves (14) are opened on both sides of the fixing groove (10). The two ends of the V-shaped pressure head press against the fixed limiting part (301) through the through grooves (14).

17. A blade unlocking structure according to any one of claims 16, characterized in that, The operating component is mounted on the machine body, and the sliding direction of the operating component is opposite to the forward direction of the blade assembly (2) when the hair clipper is in operation.

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