Double-layer magnetic suction tool bit with elastic interface

Abstract

The application provides a double-layer magnetic suction tool bit with an elastic interface, which comprises a tool bit assembly and a connecting mechanism. The tool bit assembly comprises a tool holder and a blade arranged in the tool holder; the connecting mechanism comprises a connecting piece and a clamping assembly, the connecting piece is arranged on the tool holder, a connecting groove is arranged on the side of the connecting piece away from the tool holder, and the clamping assembly is arranged on the side of the connecting piece away from the tool holder and partially extends into the connecting groove; the connecting groove has an inclined surface, and the side wall of the side of the connecting groove away from the clamping assembly is inclined outward to form the inclined surface. The double-layer magnetic suction tool bit provided by the application can complete the assembly through the continuous action chain of "sliding in - opening - resetting clamping" of the handle end along the inclined surface formed by the side of the connecting groove away from the clamping assembly, compared with the end-to-end insertion of the traditional right-angle step / flat transition, the automatic positioning ability is significantly improved, and the sensitivity to end-point alignment is reduced.

Description

Technical Field

[0001] This application relates to the field of razor technology, and more particularly to a double-layer magnetic razor head with an elastic interface. Background Technology

[0002] With the increasing popularity of replaceable shavers / trimming scissors, the detachable connection between the shaver head and the handle has become a key factor affecting user experience and product versatility. Existing shaver heads typically consist of a shaver holder and blades housed within the holder, requiring users to frequently detach and reassemble them when cleaning, maintaining, or replacing different functional shaver heads.

[0003] Existing technical solutions mainly employ a purely mechanical snap-fit / slot type, where locking is achieved by the engagement of a protruding handle with a through-hole / position on the cutter head; secondly, a magnetic attraction type, which uses permanent magnets or magnetic components placed on the handle and cutter head end faces to achieve planar adsorption and positioning. This typically requires axial insertion and engagement at the endpoint. Some solutions combine magnetic attraction and snap-fit ​​techniques.

[0004] However, the above solutions still have shortcomings in terms of ease of assembly and cross-handle compatibility. The guide structure of the connection interface is mostly a right-angle step or a planar transition, lacking continuous guiding geometric elements. It is difficult to form a continuous action chain of "automatic positioning" during assembly, and it is sensitive to alignment in wet and slippery environments, making blind assembly difficult. Therefore, there is a need for a double-layer magnetic suction cutter head with a flexible interface that can be better assembled and adapted to various handles of different sizes. Utility Model Content

[0005] In view of this, it is necessary to provide a double-layer magnetic blade head with a flexible interface that can be better assembled and adapted to various handles of different sizes, in order to solve the above problems.

[0006] Embodiments of this application provide a double-layer magnetic suction knife head with a flexible interface, comprising: A cutting head assembly, including a cutting head holder and a cutting blade disposed within the cutting head holder; A connecting mechanism includes a connector and a locking assembly. The connector is disposed on the tool holder, and a connecting groove is formed on the side of the connector opposite to the tool holder. The locking assembly is disposed on the side of the connector opposite to the tool holder and extends partially into the connecting groove. The connecting groove has an inclined surface, and the side wall of the connecting groove away from the engaging assembly is inclined outward to form the inclined surface; When the handle is connected to the connecting mechanism, the handle slides along the extension direction of the inclined surface and pushes the engaging component to increase the opening of the connecting groove. When the connecting end of the handle continues to extend into the connecting groove, the engaging component resets to engage the handle.

[0007] In at least one embodiment of this application, the engaging assembly includes an elastic member and an engaging member. The engaging member is disposed on the connector, and the engaging member and the connector enclose a receiving cavity. The elastic member is disposed within the receiving cavity, and one end of the elastic member abuts against the connector, while the other end abuts against the engaging member.

[0008] In at least one embodiment of this application, the connecting mechanism further includes a first limiting member disposed on the connecting member, the first limiting member extending into the receiving cavity and abutting against the elastic member; When the handle is inserted into the connecting groove, the elastic element pushes the locking element to reset, and the side of the locking element away from the connecting groove abuts against the first limiting element.

[0009] In at least one embodiment of this application, the connecting mechanism further includes two second limiting members disposed on the connecting member. The two second limiting members are located on opposite sides of the engaging member. Each second limiting member and the first limiting member enclose a sliding groove, and the opposite sides of the engaging member extend into the sliding groove.

[0010] In at least one embodiment of this application, each of the second limiting members has an inclined surface on the side near the engaging member, the inclined surface being radially outward along the moving direction of the engaging member, and the two sides of the engaging member opposite to the two second limiting members being parallel to the inclined surface.

[0011] In at least one embodiment of this application, the connecting mechanism further includes a third limiting member disposed on the second limiting member, the third limiting member extending partially into the slide groove to restrict the movement of the engaging member in the vertical direction.

[0012] In at least one embodiment of this application, the magnetic suction cutter head further includes a spring piece, which is disposed on the side of the connector opposite to the cutter head and located above the connecting groove; When the handle is inserted into the connecting slot, the handle abuts against the spring plate and is compressed. When the handle is unlocked, the spring plate pushes the handle to disengage the blade.

[0013] In at least one embodiment of this application, the tool holder includes a first fixing member, a second fixing member, and a third fixing member that are magnetically connected in sequence, and the side of the third fixing member opposite to the second fixing member is fixedly connected to the engaging assembly. The blade is provided between the first fixing member and the second fixing member and between the second fixing member and the third fixing member. The third fixing member and the second fixing member both extend outward from the side near the blade to form a first positioning block, which engages with the blade.

[0014] In at least one embodiment of this application, the second fixing member has a through positioning groove along its height direction, the third fixing member has a second positioning block on the side near the second fixing member, and the first fixing member has a third positioning block on the side near the second fixing member, the second positioning block and the third positioning block respectively extend into the positioning groove.

[0015] In at least one embodiment of this application, a first groove and a second groove are provided on opposite sides of the first fixing member and the second fixing member, the first groove is directly opposite the second groove, and the first groove and the second groove enclose an inner cavity, and the blade has a bent portion located inside the inner cavity.

[0016] The aforementioned double-layer magnetic chuck head with an elastic interface utilizes an inclined surface formed on the side of the connecting groove away from the engaging assembly. The handle end can complete assembly via a continuous chain of actions: "sliding in—opening—resetting and engaging" along this inclined surface. Compared to traditional end-to-end insertion with right-angle steps / flat transitions, this significantly improves automatic positioning capability and reduces sensitivity to end-to-end alignment. The handle first forms surface contact with the inclined surface and is guided, allowing for a certain degree of axial deviation and orientation error before smoothly entering the connecting groove. This is suitable for blind assembly and other similar situations, making assembly user-friendly. Attached Figure Description

[0017] Figure 1 This is a perspective view of a double-layer magnetic suction head with an elastic interface according to an embodiment of this application.

[0018] Figure 2 for Figure 1 A top view of a double-layer magnetic suction knife head with an elastic interface.

[0019] Figure 3 for Figure 1 A partial anatomical view of a double-layer magnetic suction head with an elastic interface.

[0020] Figure 4 for Figure 3 Enlarged view of part A of the double-layer magnetic suction knife head with elastic interface.

[0021] Figure 5 for Figure 1 A cross-sectional view of a double-layer magnetic suction knife head with an elastic interface.

[0022] Figure 6 for Figure 1 An exploded perspective view of a double-layer magnetic suction knife head with an elastic interface.

[0023] Figure 7 for Figure 1 An exploded view from another perspective of the double-layer magnetic suction head with an elastic interface.

[0024] Explanation of main component symbols 100. A double-layer magnetic suction blade head with an elastic interface; 10. Blade head assembly; 11. Blade holder; 111. First fixing member; 111a. Third positioning block; 111b. First groove; 112. Second fixing member; 112a. Positioning groove; 112b. Second groove; 113. Third fixing member; 113a. Second positioning block; 114. First positioning block; 115. Inner cavity; 12. Blade; 121. Bending part; 20. Connecting mechanism; 21. Connecting member; 211. Connecting groove; 211a. Inclined surface; 22. Engaging assembly; 221. Elastic member; 222. Engaging member; 23. Receiving cavity; 24. First limiting member; 25. Second limiting member; 251. Inclined surface; 26. Slide groove; 27. Third limiting member; 30. Spring piece. Detailed Implementation

[0025] The embodiments of this application will now be described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0026] It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or may also have an intervening component. When a component is considered to be "placed" on another component, it can be directly placed on the other component or may also have an intervening component. The terms "top," "bottom," "upper," "lower," "left," "right," "front," "back," and similar expressions used in this article are for illustrative purposes only.

[0027] Embodiments of this application provide a double-layer magnetic suction knife head with a flexible interface, comprising: A cutting head assembly, including a cutting head holder and a cutting blade disposed within the cutting head holder; A connecting mechanism includes a connector and a locking assembly. The connector is disposed on the tool holder, and a connecting groove is formed on the side of the connector opposite to the tool holder. The locking assembly is disposed on the side of the connector opposite to the tool holder and extends partially into the connecting groove. The connecting groove has an inclined surface, and the side wall of the connecting groove away from the engaging assembly is inclined outward to form the inclined surface; When the handle is connected to the connecting mechanism, the handle slides along the extension direction of the inclined surface and pushes the engaging component to increase the opening of the connecting groove. When the connecting end of the handle continues to extend into the connecting groove, the engaging component resets to engage the handle.

[0028] The aforementioned double-layer magnetic chuck head with an elastic interface utilizes an inclined surface formed on the side of the connecting groove away from the engaging assembly. The handle end can complete assembly via a continuous chain of actions: "sliding in—opening—resetting and engaging" along this inclined surface. Compared to traditional end-to-end insertion with right-angle steps / flat transitions, this significantly improves automatic positioning capability and reduces sensitivity to end-to-end alignment. The handle first forms surface contact with the inclined surface and is guided, allowing for a certain degree of axial deviation and orientation error before smoothly entering the connecting groove. This is suitable for blind assembly and other similar situations, making assembly user-friendly.

[0029] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0030] Please see Figures 1-7 The embodiments of this application provide a double-layer magnetic chuck head 100 with a flexible interface, including a chuck head assembly 10 and a connecting mechanism 20.

[0031] The blade assembly 10 includes a blade holder 11 and a blade 12 disposed within the blade holder 11; the connecting mechanism 20 includes a connector 21 and a locking assembly 22. The connector 21 is disposed on the blade holder 11, and a connecting groove 211 is formed on the side of the connector 21 opposite to the blade holder 11. The locking assembly 22 is disposed on the side of the connector 21 opposite to the blade holder 11 and partially extends into the connecting groove 211. The connecting groove 211 has an inclined surface 251, and the side wall of the connecting groove 211 away from the engaging component 22 is inclined outward to form the inclined surface 251. When the handle is connected to the connecting mechanism 20, the handle slides along the extension direction of the inclined surface 251 and pushes the engaging component 22 to increase the opening of the connecting groove 211. When the connecting end of the handle continues to extend into the connecting groove 211, the engaging component 22 resets to engage the handle.

[0032] Specifically, in this embodiment, it should be noted that the cutter head is a replaceable structure, consisting of a cutter head assembly 10 and a connecting mechanism 20. The cutter head assembly 10 includes a cutter holder 11 and a blade 12 disposed within the cutter holder 11, which serves as a load-bearing and force-bearing base. The connecting mechanism 20 consists of a connector 21 and a locking assembly 22. The connector 21 is fixed to the cutter holder 11, and its side facing away from the cutter holder 11 has an integrally formed connecting groove 211 for engaging with the end of the handle. The locking assembly 22 is disposed on the side of the connector 21 facing away from the cutter holder 11, and in the initial state, a portion of it extends into the connecting groove 211, thereby forming a pre-recessed opening at the entrance of the connecting groove 211. The connecting groove 211 has an inclined surface 251, which is formed by the sidewall away from the locking assembly 22 tilting outward. In the embodiments of this application, the connecting groove has an elliptical opening to further avoid right-angle collisions.

[0033] Preferably, the inclined surface 251 has a normal angle of approximately 25° relative to the handle insertion direction and extends continuously along the intended insertion direction of the handle, forming a sliding guide surface for the handle end. In this embodiment, the engaging component 22 is preferably a tongue-type component capable of elastically displacement. Its root is fixed to the connector 21, and its free end extends into the connecting groove 211. It can generate controlled displacement under external force and spring back to its original position after the external force is released. During assembly, the handle end first contacts the inclined surface 251 and slides along its extension direction. The contact force is decomposed into a guiding component along the surface and a normal component pointing towards the engaging component 22. The normal component pushes the engaging component 22 outward, increasing the effective opening of the connecting groove 211 during assembly. When the handle connecting end further extends to a predetermined depth, the engaging component 22 resets under its own elastic recovery and forms a locking engagement with the corresponding positioning surface of the handle end, thereby completing the locking.

[0034] Furthermore, the inclined surface 251 provides a surface contact guide that is present from the moment of contact. The handle completes the assembly along a continuous action chain of "sliding in—opening—entering the groove—resetting and locking," significantly reducing the dependence on the alignment of the endpoints and improving the positioning stability under blind assembly and wet hand conditions. During the assembly stage, the locking component 22 yields under force, and the opening of the connecting groove 211 dynamically expands, significantly reducing the peak insertion force and avoiding jamming and impact caused by hard interference, allowing for smooth assembly even with one hand. The wedge-shaped guide of the inclined surface 251 and the elastic yield of the locking component 22 form a geometric-elastic adaptive combination that can absorb radial dimensional deviations and certain angular / positional deviations at the end of the handle, improving the success rate of assembly on the first attempt and cross-handle compatibility.

[0035] Furthermore, after the handle is in place, the locking assembly 22 resets and, together with the groove wall, forms a dual axial and radial constraint on the handle end. During use, it provides excellent resistance to pull-out and torsion, reducing vibration and abnormal noise, and increasing stability. The entire assembly process primarily utilizes sliding guides and elastic clearance to avoid repeated hard impacts on sharp locking points. This reduces wear on the locking surface and groove edges, which is beneficial for maintaining locking force over a long period and extending the mechanism's lifespan. The surface contact sliding guide replaces the "point-to-hole" approach, maintaining a stable guide path even in the presence of water, foam, or other lubricating media, reducing slippage and repeated insertion attempts, making it more suitable for wet and slippery environments.

[0036] In one specific embodiment, the engaging assembly 22 includes an elastic element 221 and an engaging element 222. The engaging element 222 is disposed on the connector 21, and the engaging element 222 and the connector 21 surround to form a receiving cavity 23. The elastic element 221 is disposed in the receiving cavity 23, and one end of the elastic element 221 abuts against the connector 21, and the other end abuts against the engaging element 222.

[0037] Specifically, in this embodiment, it should be noted that the engaging assembly 22 is composed of an elastic element 221 and an engaging element 222. The engaging element 222 is mounted on the connector 21 and together with the connector 21, forms a receiving cavity 23. The elastic element 221 is disposed within the receiving cavity 23, with one end abutting against the connector 21 and the other end abutting against the engaging element 222. Preferably, the elastic element 221 is an axially compressible element (such as any one of a helical compression spring, an elastic washer, or an elastic block), which can be given a moderate preload during assembly, so that the engaging element 222 generates a stable contact force towards the connecting groove 211 in the initial state. The engaging element 222 has a force-bearing surface that can contact the end of the handle on the side facing the connecting groove 211, and a pressure-bearing surface that abuts against the elastic element 221 on the other side. The cavity wall of the receiving cavity 23 plays a role in axial guidance and position limitation for the elastic element 221 and the engaging element 222, avoiding swaying and jamming.

[0038] Furthermore, the elastic element 221 undergoes controlled compression and rebound within the receiving cavity 23, enabling the engaging element 222 to generate a clear "rebound-lock" feedback upon reaching its final position, facilitating blind installation confirmation. Under the pressure of the handle, the engaging element 222 yields along a predetermined direction, with the elastic element 221 providing predictable damping and restoring force to prevent jamming and excessive peak insertion force caused by rigid interference. The elastic element 221 provides continuous pre-pressure, ensuring the engaging element 222 forms a tight fit against the handle in the working position, reducing looseness and abnormal noise caused by micro-gap.

[0039] In one specific embodiment, the connecting mechanism 20 further includes a first limiting member 24 disposed on the connecting member 21, the first limiting member 24 extending into the receiving cavity 23 and abutting against the elastic member 221; When the handle is inserted into the connecting groove 211, the elastic element 221 pushes the locking element 222 to reset, and the side of the locking element 222 away from the connecting groove 211 abuts against the first limiting element 24.

[0040] Specifically, in this embodiment, it should be noted that the connecting mechanism 20 further includes a first limiting member 24 disposed on the connecting member 21. The first limiting member 24 extends from one side of the connecting member 21 into the receiving cavity 23 formed by the engaging member 222 and the connecting member 21, and its inner end face abuts against the elastic member 221, serving as a positioning and force-bearing base for the elastic member 221; the other end of the elastic member 221 abuts against the side of the engaging member 222 away from the connecting groove 211. During assembly, when the handle slides into the inclined surface 251 of the connecting groove 211 and presses against the engaging member 222, the engaging member 222 moves away from the connecting groove 211, the elastic member 221 is compressed and stores energy on the end face of the first limiting member 24; when the connecting end of the handle enters a predetermined depth and the external pressure is released, the elastic member 221 rebounds and pushes the engaging member 222 back to the direction of the connecting groove 211, so that the engaging member 222 and the end of the handle form a locking engagement.

[0041] Furthermore, upon completion of the reset, the side of the engaging member 222 facing away from the connecting groove 211 abuts against the first limiting member 24, thereby defining the reset endpoint position of the engaging member 222. The first limiting member 24 serves both as the seat and guide of the elastic member 221 and as a mechanical stop after the engaging member 222 has been reset, preventing overshoot or position drift during reset. In this embodiment, the first limiting member 24 is preferably made with an end face that is substantially perpendicular to the direction of movement of the engaging member 222 to obtain a stable and repeatable stroke boundary.

[0042] Preferably, after the locking component 222 is reset, it directly abuts against the first limiting component 24, forming a clear mechanical zero position. This avoids reset "drift" caused by long-term fatigue or dimensional drift of the elastic component 221, ensuring that the locking position and engagement depth are consistent across batches. The first limiting component 24 serves as the base for the elastic component 221, allowing the initial preload and compression stroke of the elastic component 221 to be precisely set through structural dimensions. A stable "click" tactile feel and acoustic feedback are generated at the moment of reset, improving the confirmation accuracy of blind assembly. When the elastic component 221 is subjected to assembly force, it is compressed in a controlled manner with the first limiting component 24 as its base. The maximum compression is limited by the cavity and the stop, avoiding elastic fatigue or permanent deformation caused by overpressure, thereby improving the service life and mechanical stability after repeated assembly and disassembly.

[0043] In one specific embodiment, the connecting mechanism 20 further includes two second limiting members 25 disposed on the connecting member 21. The two second limiting members 25 are located on opposite sides of the engaging member 222. Each second limiting member 25 and the first limiting member 24 surround each other to form a sliding groove 26. The opposite sides of the engaging member 222 extend into the sliding groove 26.

[0044] Specifically, in this embodiment, it should be noted that the connecting mechanism 20 is further provided with two second limiting members 25, which are respectively arranged on opposite sides of the engaging member 222. Each second limiting member 25 and the first limiting member 24 enclose each other to form a groove 26, and the opposite sides of the engaging member 222 extend into the corresponding groove 26. The two grooves 26 are consistent with the main movement direction of the engaging member 222, forming paired lateral guide rails for the engaging member 222. The first limiting member 24 serves as the inner reference surface, and the second limiting member 25 serves as the outer guide wall, jointly defining the groove width, groove depth, and straightness of the groove 26. To obtain smooth sliding and stable guidance, a chamfer or rounded transition can be provided at the entrance of the groove 26, and a small fitting gap is reserved between the groove 26 and the side of the engaging member 222 to take into account both low friction and anti-shaking requirements.

[0045] Furthermore, the paired grooves 26 provide clear lateral constraints for the engaging component 222, significantly suppressing lateral sway and axial torsion. This ensures that the engaging component 222 maintains an approximately linear displacement trajectory when pressed by the handle and rebounded by the elastic element 221, resulting in smooth insertion and precise resetting. The grooves 26 limit the lateral freedom of the engaging component 222 and, together with the first limiting element 24, form a three-dimensional reference, avoiding changes in the engagement position caused by posture deviation. The locking depth and the overlap of the engagement surface are more stable during batch assembly and long-term use.

[0046] In one specific embodiment, each of the second limiting members has an inclined surface 251 on the side near the engaging member 222. The inclined surface 251 is radially outward along the moving direction of the engaging member 222, and the two sides of the engaging member 222 opposite to the two second limiting members 25 are parallel to the inclined surface 251.

[0047] Specifically, the second limiting member 25 is configured with an inclined surface 251 that is radially outward along the direction of movement on the side near the engaging member 222, and it is parallel to the corresponding side of the engaging member 222, so that the two sides form a stable, equal-gap surface-to-surface guiding relationship. During the assembly or unlocking reciprocating process, the contact is shared by the surface rather than the corners, which significantly reduces the risk of "biting," "scratching," and jamming, and makes the operation smoother.

[0048] Furthermore, the parallel inclined surfaces 251, when joined, allow for a more uniform distribution of contact pressure along the height direction, avoiding localized peak stress. The outward-inclined geometry decomposes and diffuses the normal force during relative sliding to a larger effective contact area, thereby reducing the coefficient of friction and sidewall wear, and improving guide life and tactile consistency. The outward-inclined and parallel sides effectively form a "tolerance buffer zone." When the engaging part 222 has a slight lateral offset or skew, it will not suddenly wedge or jam, but will continue to guide with a nearly constant lateral clearance, improving adaptability to manufacturing and assembly tolerances, thermal expansion and contraction, and long-term wear.

[0049] In one specific embodiment, the connecting mechanism 20 further includes a third limiting member 27 disposed on the second limiting member 25. The third limiting member 27 extends partially into the slide groove 26 to limit the movement of the engaging member 222 in the vertical direction.

[0050] Specifically, in this embodiment, it should be noted that the connecting mechanism 20 has a third limiting member 27 on each of the second limiting members 25. The third limiting member 27 forms a partial flange / shoulder on the side facing the slide groove 26, and partially extends into the internal space of the corresponding slide groove 26. The third limiting member 27 and the inner wall of the slide groove 26 together define a "stop surface" on the side of the engaging member 222 in the vertical direction, so that the vertical degree of freedom of the side of the engaging member 222 in the slide groove 26, except for the main direction of movement, is restricted to the designed small working gap range.

[0051] Furthermore, the third limiting member 27 can be integrally formed with the second limiting member 25, or it can be fixed to it as an insert structure; its extension amount and end face height match the height of the groove 26 and the side height of the engaging member 222 to form a controllable vertical gap. In this way, the groove 26 is limited in the horizontal direction by the second limiting member 25 and the first limiting member 24, and in the vertical direction by the third limiting member 27, which provides additional constraint. The engaging member 222 moves approximately linearly back and forth in the predetermined direction within the receiving cavity 23 without vertical movement or folding. To reduce contact stress and improve durability, the surfaces that the third limiting member 27 and the engaging member 222 may contact are preferably flat surfaces or working surfaces with slight curvature; to accommodate the tolerances of different batches of elastic members 221 and mating parts, the effective height of the third limiting member 27 can be finely adjusted by selecting shims of different thicknesses or machining shoulder heights, but the above methods are preferred implementations of this embodiment.

[0052] In one specific embodiment, the magnetic suction cutter head further includes a spring piece 30, which is disposed on the side of the connector 21 opposite to the cutter head and located above the connecting groove 211; When the handle is inserted into the connecting groove 211, the handle abuts against the spring piece 30 to compress it. When the handle is unlocked, the spring piece 30 pushes the handle to disengage the blade.

[0053] Specifically, in this embodiment, it should be noted that the magnetic suction cutter head is equipped with a spring piece 30 structure. The spring piece 30 is disposed on the side of the connector 21 away from the cutter head and located above the connecting groove 211. The spring piece 30 is preferably a leaf spring made of elastic metal or a laminate of elastic body, and can be cantilevered, arched, or partially convex in shape. Its free end or arch apex slightly protrudes into the space above the entrance of the connecting groove 211 so that it first contacts and is compressed with the end of the handle or its upper side when the handle is inserted.

[0054] During assembly, the handle is inserted along the direction of the connecting groove 211 and touches the upper spring piece 30. The spring piece 30 generates controllable compression and stores elastic energy. When the user performs the unlocking action and the locking relationship is released, the spring piece 30 releases elastic potential energy to apply an external pushing force to the handle, actively separating the handle from the cutter head along the insertion and removal direction, making disassembly more convenient.

[0055] Furthermore, the spring 30 provides axial outward thrust at the moment of unlocking, overcoming magnetic retention force and frictional resistance to achieve "active ejection," effectively avoiding adhesion and retention caused by magnetic force or a wet interface. The controlled compression during insertion and the rapid rebound during unlocking form a clear mechanical feedback curve, allowing users to identify the "in place / out place" node by feel even in a blind installation environment, reducing the peak pulling force required for unlocking. The separation process is assisted by the spring 30, eliminating the need for users to swing or pull forcefully, reducing the risk of slippery fingers falling off or accidentally injuring themselves; it also facilitates quick one-handed replacement of the blade.

[0056] In one specific embodiment, the tool holder 11 includes a first fixing member 111, a second fixing member 112 and a third fixing member 113 connected magnetically in sequence, and the side of the third fixing member 113 facing away from the second fixing member 112 is fixedly connected to the engaging assembly 22. The blade 12 is provided between the first fixing member 111 and the second fixing member 112 and between the second fixing member 112 and the third fixing member 113. The third fixing member 113 and the second fixing member 112 both extend outward to form a first positioning block 114 on the side close to the blade 12. The first positioning block 114 engages with the blade 12.

[0057] Specifically, in this embodiment, it should be noted that the tool holder 11 is composed of a first fixing member 111, a second fixing member 112, and a third fixing member 113 connected magnetically in sequence. The second fixing member 112 is located in the middle and serves as a reference layer for the assembly and positioning of the blade 12. Adjacent fixing members are attracted to each other by magnetic attraction. The magnetic connection can be achieved by the interaction between a permanent magnet disposed in one fixing member and a magnetic component of another fixing member, or by permanent magnets on both sides attracting each other. The specific type, arrangement, and magnetization direction of the magnets do not constitute a limitation on this embodiment. The side of the third fixing member 113 facing away from the second fixing member 112 is fixedly connected to the engaging component 22 in the connecting mechanism 20, so that the force on the tool holder 11 and the assembly / disassembly load on the handle side can be directly transmitted to the entire tool holder 11 frame through the third fixing member 113, without being transmitted through the blade 12 body.

[0058] Furthermore, in terms of structural arrangement, blades 12 are respectively provided between the first fixing member 111 and the second fixing member 112, and between the second fixing member 112 and the third fixing member 113. The blades 12 can be integral, separate, or a combination of blades 12 with different functions. To ensure the precise positioning of the blades 12 during assembly and use, the third fixing member 113 and the second fixing member 112 both extend outward on the side near the blades 12 to form a first positioning block 114. The first positioning block 114 and the adjacent fixing members together define the assembly window of the blades 12 and engage and limit the edge of the blades 12. The specific geometry of the first positioning block 114 can be a step, a micro-wedge, or a toothed structure with rounded corners. Its corresponding surface with the adjacent fixing members provides constraints on the blades 12 in the axial, radial, and axial orientation directions.

[0059] Furthermore, the magnetic connection generates an adsorption preload on the three-layer fasteners facing the reference layer during assembly, so that the blade 12 is uniformly pressed in the clamping area of ​​the first positioning block 114 and the adjacent positioning surface, achieving self-centering and self-adhesion; at the same time, the first positioning block 114 plays a geometric determination role in the final position of the blade 12, thereby obtaining a stable assembly state under the dual action of magnetic preload and geometric limit.

[0060] Preferably, the magnetic attraction between adjacent fasteners provides self-adhesion and self-alignment functions towards the second fastener 112, making the three-layer structure tend to be coplanar and coaxial at the moment of placement; the first positioning block 114 geometrically engages the edge of the blade 12, and the position of the blade 12 is ultimately determined by the geometric surface, significantly improving the consistency of the blade 12's exposed area, pitch angle, and flatness. The fixed connection between the third fastener 113 and the engaging assembly 22 establishes a direct load path of "handle → engaging assembly 22 → third fastener 113 → blade holder 11". The tension and torque during shaving are transmitted through the blade holder 11 skeleton, avoiding the application of working load to the blade 12 body and reducing the risk of blade 12 deformation and accidental chipping.

[0061] In one specific embodiment, the second fixing member 112 has a through positioning groove 112a along its height direction, the third fixing member 113 has a second positioning block 113a on the side near the second fixing member 112, and the first fixing member 111 has a third positioning block 111a on the side near the second fixing member 112. The second positioning block 113a and the third positioning block 111a respectively extend into the positioning groove 112a.

[0062] Specifically, in this embodiment, it should be noted that: the second fixing member 112 has a through positioning groove 112a along its height direction, and the positioning groove 112a extends through its thickness to form a channel for geometric alignment and positioning. The third fixing member 113 has a second positioning block 113a on its side near the second fixing member 112, and the first fixing member 111 has a third positioning block 111a on its side near the second fixing member 112; during assembly, the second positioning block 113a and the third positioning block 111a extend into the positioning groove 112a of the second fixing member 112 from opposite sides, thereby forming a tenon-and-mortise-like interlocking relationship inside the positioning groove 112a.

[0063] Furthermore, the two side walls of the positioning groove 112a serve as reference guide surfaces, respectively facing the mating surfaces of the second positioning block 113a and the third positioning block 111a. To achieve smooth insertion and stable fit, the entrance of the positioning groove 112a can be chamfered or rounded, and the outer edge of the positioning block is preferably rounded. The width of the positioning groove 112a and the thickness of the two positioning blocks form a controlled side clearance, so that after assembly, the two positioning blocks simultaneously form facing limits and guides with the opposite side walls of the positioning groove 112a. Along the height direction, the insertion depth of the positioning blocks limits the final relative position between the three layers of fasteners. Since there is also magnetic attraction between adjacent fasteners, the magnetic force pulls the first and third fasteners 113 towards the direction of the second fastener 112 during the assembly process, causing the two positioning blocks to slide into the positioning groove 112a in self-alignment and fit against the groove wall, completing geometric positioning and pre-pressing. The above structure ensures that the relative posture of the three layers of fasteners is determined by "magnetic preload + groove-block geometric limit", rather than relying solely on magnetic force.

[0064] Furthermore, the through-groove 112a of the second fixing member 112 provides a unified geometric reference for the first and third fixing members 113; the positioning blocks on both sides are simultaneously inserted into the same groove, eliminating interlayer translation and sway, enabling the three-layer structure to quickly self-align in terms of flatness and coaxiality. The two positioning blocks and the positioning groove 112a form a four-sided constrained "reverse interlocking" connection, significantly improving the interlayer's ability to resist shear and torsional loads; during shaving, the torque from the handle is directly closed onto the blade holder 11 skeleton through the positioning block-groove wall, reducing stress transmission to the blade 12.

[0065] In one specific embodiment, the contact surface between the connecting mechanism 20 and the tool holder 11 is an inclined surface 251.

[0066] Preferably, the connecting mechanism 20 is mounted at a fixed angle relative to the shaving head. Specifically, the mounting base of the connecting mechanism 20 forms an angle θ with the horizontal reference base, where θ takes any value within the range of 10–30°. By setting a fixed tilt angle within the 10–30° window, the handle reduces the ulnar / radial deviation and flexion / extension of the wrist in common shaving postures, bringing the wrist closer to a neutral position, making prolonged use less strenuous and reducing fatigue. The working plane of the shaving head forms a more suitable angle of incidence with the skin, making it more natural when conforming to areas with greater curvature such as the jawline, the side of the neck, and the area around the nose, reducing the need for repeated touch-ups.

[0067] In one specific embodiment, the first fixing member 111 and the second fixing member 112 have a first groove 111b and a second groove 112b on their opposite sides. The first groove 111b is directly opposite the second groove 112b. The first groove 111b and the second groove 112b enclose an inner cavity 115. The blade 12 has a bent portion 121, which is located inside the inner cavity 115.

[0068] Specifically, the blade 12 has a straight double-blade structure. Before or during actual use, the user typically breaks the complete blade 12 into two single-edged blades 12 by hand along a predetermined break line. Because manual breaking causes localized plastic deformation and warping at the break point, it forms an irregular metal bend 121 with a certain height and width. To ensure that the broken single-edged blade 12 can still stably fit against the blade holder 11 and be reliably clamped during assembly, the inner surfaces of the first fixing member 111 and the second fixing member 112 are respectively provided with a first groove 111b and a second groove 112b. After closing, the two grooves enclose an inner cavity 115 extending along the length of the blade 12, specifically designed to accommodate the bend 121 generated during breaking.

[0069] Furthermore, the width and depth dimensions of the inner cavity 115 are preferably slightly larger than the typical envelope of the bent portion 121 to provide the necessary assembly clearance. During assembly, the cutting edge of the straight segment of the blade 12 is limited in its exposure and pitch angle by the reference surface on the outer side of the fixing member, while the bent portion 121 is completely contained within the inner cavity 115, without pressing against the fixing member or being exposed on the blade holder surface, thereby achieving the functional partitioning of "cutting edge positioned on the outside, bending hidden on the inside". This embodiment does not limit the specific shape of the bent portion 121; any local bending, arching, or edge warping caused by manual breakage can be accommodated and limited by the inner cavity 115.

[0070] Furthermore, the bent portion 121 is "absorbed" by the inner cavity 115, avoiding top-impact and false contact in the clamping area. Even after the single-edged blade 12 is broken, it can still form uniform surface pressure with the fixing component, resulting in a more reasonable distribution of clamping force. The straight section of the cutting edge is uniformly defined by the outer reference surface of the fixing component, and the bending no longer interferes with the cutting edge posture. After assembly, the exposed portion and incident angle remain stable, reducing the risk of missed scraping and scratching. To address the inconsistencies in bending height, radius, and shape caused by manual breaking, the inner cavity 115 absorbs the tolerance by reserving side clearances and top clearances, avoiding assembly difficulties or excessive tightening due to individual differences.

[0071] In this embodiment, grooves are formed between adjacent fasteners in the clamping areas of the multiple fasteners holding the blade 12, and the two grooves enclose an inner cavity 115. Grooves are provided above and below the blade, which can accommodate the bending direction of the bending portion 121 during blade assembly, preventing warping of the fasteners. The blades 12 are all industry-standard parts, and the grooves can be fixed in position when engaged with the first positioning block 114. The area of ​​the grooves is larger than the bending portion 121 of the blade, which can also accommodate some non-standard blades 12.

[0072] The above description is merely an embodiment of this application. It should be noted that those skilled in the art can make improvements without departing from the inventive concept of this application, but these improvements all fall within the protection scope of this application.

Claims

1. A double-layer magnetic suction knife head with an elastic interface, characterized in that, include: A cutting head assembly, including a cutting head holder and a cutting blade disposed within the cutting head holder; A connecting mechanism includes a connector and a locking assembly. The connector is disposed on the tool holder, and a connecting groove is formed on the side of the connector opposite to the tool holder. The locking assembly is disposed on the side of the connector opposite to the tool holder and extends partially into the connecting groove. The connecting groove has an inclined surface, and the side wall of the connecting groove away from the engaging assembly is inclined outward to form the inclined surface; When the handle is connected to the connecting mechanism, the handle slides along the extension direction of the inclined surface and pushes the engaging component to increase the opening of the connecting groove. When the connecting end of the handle continues to extend into the connecting groove, the engaging component resets to engage the handle.

2. The double-layer magnetic suction head with an elastic interface according to claim 1, characterized in that, The engaging assembly includes an elastic element and an engaging element. The engaging element is disposed on the connecting element, and the engaging element and the connecting element enclose a receiving cavity. The elastic element is disposed within the receiving cavity, with one end of the elastic element abutting against the connecting element and the other end abutting against the engaging element.

3. A double-layer magnetic suction head with an elastic interface according to claim 2, characterized in that, The connecting mechanism further includes a first limiting member disposed on the connecting member, the first limiting member extending into the receiving cavity and abutting against the elastic member; When the handle is inserted into the connecting groove, the elastic element pushes the locking element to reset, and the side of the locking element away from the connecting groove abuts against the first limiting element.

4. A double-layer magnetic suction head with an elastic interface according to claim 3, characterized in that, The connecting mechanism further includes two second limiting members disposed on the connecting member. The two second limiting members are located on opposite sides of the engaging member. Each second limiting member and the first limiting member enclose a sliding groove, and the opposite sides of the engaging member extend into the sliding groove.

5. A double-layer magnetic suction head with an elastic interface according to claim 4, characterized in that, Each of the second limiting members has an inclined surface on the side near the engaging member. The inclined surface is radially outward along the moving direction of the engaging member, and the two sides of the engaging member opposite to the two second limiting members are parallel to the inclined surface.

6. A double-layer magnetic suction head with an elastic interface according to claim 4, characterized in that, The connecting mechanism further includes a third limiting member disposed on the second limiting member, the third limiting member extending partially into the slide groove to restrict the movement of the engaging member in the vertical direction.

7. A double-layer magnetic suction cutter head with an elastic interface according to claim 1, characterized in that, The magnetic suction cutter head also includes a spring piece, which is disposed on the side of the connector opposite to the cutter head and located above the connecting groove; When the handle is inserted into the connecting slot, the handle abuts against the spring plate and is compressed. When the handle is unlocked, the spring plate pushes the handle to disengage the blade.

8. A double-layer magnetic suction head with an elastic interface according to claim 1, characterized in that, The tool holder includes a first fixing member, a second fixing member, and a third fixing member that are magnetically connected in sequence. The side of the third fixing member opposite to the second fixing member is fixedly connected to the engaging assembly. The blade is provided between the first fixing member and the second fixing member and between the second fixing member and the third fixing member. The third fixing member and the second fixing member both extend outward from the side near the blade to form a first positioning block, which engages with the blade.

9. A double-layer magnetic suction head with an elastic interface according to claim 8, characterized in that, The second fixing member has a through positioning groove along its height direction. The third fixing member has a second positioning block on the side near the second fixing member. The first fixing member has a third positioning block on the side near the second fixing member. The second positioning block and the third positioning block extend into the positioning groove respectively.

10. A double-layer magnetic suction head with an elastic interface according to claim 8, characterized in that, The first fixing member and the second fixing member have a first groove and a second groove on their opposite sides. The first groove is directly opposite the second groove, and the first groove and the second groove enclose an inner cavity. The blade has a bent portion, which is located inside the inner cavity.

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