Cutter head structure of body hair cutter
By combining the shape support made of flexible metal sheets in the body hair knife head with the fixed knife bracket, the existing body hair knife mesh deformation and complex structure of the fixed knife are solved, and a more stable and cleaner cutting head structure and better use feeling are achieved.
Patent Information
- Application Number
- CN202421533151.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-01
- Publication Date
- 2025-05-06
- Estimated Expiration
- 2034-07-01
AI Technical Summary
The existing reciprocating body hair knife's knife's cutter is made of bending thin metal, which makes it easy to cause problems such as jamming, deformation and cutting efficiency reduction during use. At the same time, the riveting or threaded connection of the fixed knife structure has problems such as deformation, difficulty in cleaning and messy internal structure.
The body hair knife head structure with a shaped support is adopted. The shaped support made of flexible metal sheets is combined with the fixed tool bracket to provide moderate tightness support, avoiding riveting or threaded connection, and the entire machine structure is more compact and clean.
The stability and skin feeling of the fixed knife are improved, the deformation of the knife net and the phenomenon of the jig, the number of parts is reduced, the internal structure is more reasonable, the assembly is convenient, and the feeling of using is better.
Smart Images
Figure CN222831870U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a cutter head for a body hair cutter, in particular to a cutter head for a reciprocating body hair cutter. Background Art
[0002] The reciprocating razors on the market include a blade net, a plastic support seat and a moving blade assembly. The blade net is made of bent thin metal, and the moving blade needs to fit tightly against the bottom surface of the blade net to achieve cutting. The blade and even the R of the moving blade need to accurately match the curvature of the blade net. At the same time, when the product is in use, the uneven force on the blade net will cause excessive current, and severe cases may cause the machine to jam. Furthermore, the blade net will deform after long-term use, affecting the cutting efficiency and causing hair pulling or tearing. The fixed knife structure on the knife head is generally fixed by integral injection molding with the plastic part. Since the fixed knife structure is a small structural part with high precision, the mold for integral injection molding has high requirements, the mold is complex, and the injection molding conditions are strict. For the knife net formed by bending thin metal, after the knife net is installed on the fixed knife bracket, its surface is too loose, and the moving knife may get stuck or the knife net may collapse during use, affecting the use and skin feel. If the support is excessive, the knife net will appear too hard and it is easy to break. Because the fixed knife bracket is a dead support or a hard support, some manufacturers now add spring parts at both ends of the fixed knife bracket. However, this structure can only make the entire knife net have a certain degree of floating, and cannot make the knife net properly tensioned.
[0003] Furthermore, for body hair cutters, hair on the body is finer and softer than on the face, and the skin surface varies greatly depending on the part of the body. Not only are there requirements for the cut part and the exposed skin feel, but also the fine and soft hair is easily attached to the riveted or threaded connection gaps after being cut, which is very difficult to clean. Furthermore, riveted or threaded connections can easily cause inevitable deformation of parts, especially after long-term use, the probability of failure or damage points at the deformation point is higher than other places. At the same time, riveted or threaded connections occupy a large internal space, the product output assembly strength consistency is low, and the internal structure is messy. Summary of the invention
[0004] The utility model provides a body hair razor head structure with a shaped support piece, which provides appropriate support for a fixed knife, has good skin feel and a stable structure.
[0005] To solve the above technical problems, the utility model adopts the following technical solutions: a body hair razor head structure, including a fixed knife mechanism, a moving knife mechanism installed in the fixed knife mechanism, the fixed knife mechanism including a bent and arched fixed knife and a fixed knife bracket for fixing the fixed knife, the fixed knife is a flexible metal sheet with flexibility, the moving knife mechanism including a moving knife placed in the fixed knife mechanism and capable of reciprocating left and right relative to the fixed knife, and a moving knife seat on which the moving knife is installed, the fixed knife mechanism also includes a shape support member between the fixed knife and the fixed knife bracket for supporting the shape of the knife net, the shape support member is integrally formed and includes left and right arched frames, a shaped frame surface fixed between the roots of the four corners of the left and right arched frames and snap-jointed to form a supporting plane, a center hole is opened in the center of the shaped frame surface, the shape support member is tightened, snap-jointed, and welded to the center under the action of a certain external force to form a shaped frame surface, the left and right arched frames are partially or completely flat to the left and right ends of the lower surface of the fixed knife, so that the fixed knife is tightened and fixed on the fixed knife bracket along the two arched frames.
[0006] As an improvement: the surface of the shaped chassis also has a connecting part extending downward from the left and right edges of the center hole to form a fixed connection with the fixed knife bracket, and the left and right inner walls of the center through hole opened in the center of the fixed knife bracket are provided with buckles that cooperate with the connecting part to achieve a limited connection.
[0007] As an improvement: the fixed knife bracket is formed by two connecting units being staggered and fixed on the left and right sides. The connecting unit includes a base in the shape of a "7", a fixing ring protruding from the end of the base and adapted to the end of the fixed knife, and the base in the shape of a "7" has a connecting long arm 211 and a connecting short arm 212. The two connecting units are staggered and fixed by connecting devices on the connecting long arm and the connecting short arm, and a central through hole is formed in the center of the fixed knife bracket for the lower part of the movable knife seat to pass through. The connecting device of this embodiment includes a plug-in hole 213 and a plug-in column 214 respectively arranged on the connecting long arm 211 and the connecting short arm of the connecting unit. The connecting long arms and the connecting short arms of the left and right connecting units are staggered and plugged and fixed to form a fixed knife bracket through the plug-in holes and the plug-in column.
[0008] As an improvement: the movable knife includes a long movable knife supporting surface, and the front and rear edges of the supporting surface are bent obliquely upward to form two oblique short side knives standing opposite to each other inward, and the cutting edges are continuously distributed on the oblique short side knives, and there is a spacing between the free ends of the front and rear oblique short side knives.
[0009] As an improvement: the movable knife is symmetrically provided with at least one pair of downward folding connecting pieces which are integrally formed with the movable knife, the lower part of the movable knife seat is provided with a driving son which is transmission-connected with the transmission mechanism, and the downward folding connecting piece is provided with a limiting connection structure which is snap-connected or buckled with the left and right outer side walls of the driving son.
[0010] As an improvement: the shape support member includes transverse connecting frames extending obliquely upward from the front and rear transverse edges of the shaping base frame, and the transverse connecting frames are flatly supported on the front and rear inner walls of the fixed knife.
[0011] As an improvement: a supporting spring sheet is provided on the moving knife seat below the moving knife, and the upper surface of the fixed knife bracket has a plurality of laterally extending ridges, and the two ends of the supporting spring sheet are crimped on the ridges. The supporting spring sheet elastically supports the moving knife mechanism to be close to the fixed knife mechanism and can reciprocate left and right relative to the fixed knife mechanism.
[0012] The beneficial effects provided by the utility model are: the fixed knife is supported by combining an integrally formed shape support with a fixed knife bracket, the shape support is made of a flexible metal sheet, and its own flexibility is used to provide the fixed knife with a support of appropriate tightness at all times. During use, it adaptively provides partial or overall appropriate support for the fixed knife, whether it is a curved flexible metal fixed knife or a fixed knife with a shape, to maintain the shape and surface flatness of the fixed knife. Furthermore, the two arched frames of the shape support are tightened by snap-fitting the fixed frame surface, and the entire shape support has no rivets and threaded parts. After the snap-fitting is completed, it is directly fixed by ultrasonic welding, and the surface is smooth, which is very convenient to clean and maintain, providing a basis for the whole machine without rivets and threaded parts. The internal structure is clear and reasonable, easy to assemble, small and compact, and better feel in use. In particular, fixed knives with oblique cutting surfaces or curved working surfaces are more suitable. The utility model has a simple structure and is easy to implement. While improving the stability and life of the knife net and fixed knife, it is also the basis for high-precision matching of the knife head components.
[0013] The utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a structural schematic diagram of a first embodiment of the body hair razor head structure of the utility model.
[0015] Figure 2 It is a structural diagram of the fixed knife mechanism for removing the fixed knife.
[0016] Figure 3 yes Figure 1 sectional view of .
[0017] Figure 4 It is a structural schematic diagram of a second embodiment of the body hair razor head structure of the utility model.
[0018] Figure 5 It is a structural schematic diagram of a third embodiment of the body hair razor head structure of the utility model. DETAILED DESCRIPTION
[0019] In the description of the present utility model, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present utility model. In the description of the present utility model, it should be understood that the terms "connected", "connected", "fixed" and the like used in the present utility model should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or a welding connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0020] like Figure 1 , Figure 2 , Figure 3As shown, the first embodiment of the body hair razor head structure of the utility model comprises a fixed knife mechanism and a moving knife mechanism installed in the fixed knife mechanism, wherein the fixed knife mechanism comprises a bent and arched fixed knife 1 and a fixed knife bracket 2 for fixing the fixed knife 1, wherein the fixed knife 1 is a flexible metal sheet with flexibility, wherein the moving knife mechanism comprises a moving knife 3 which is placed in the fixed knife mechanism and can reciprocate left and right relative to the fixed knife 1, and a moving knife seat 4 on which the moving knife is installed, wherein the fixed knife mechanism further comprises a support member 5 between the fixed knife 1 and the fixed knife bracket 2 for supporting the shape of the knife net The support member 5 made of flexible metal sheet integrally formed includes two arched frames 51 on the left and right, a fixed frame surface 52 fixed between the roots of the four corners of the two arched frames 51 and snap-jointed to form a support plane, a center hole 53 is opened in the center of the fixed frame surface, and the support member 5 is tightened, snap-jointed, and welded to form the fixed frame surface 52 under the action of a certain external force. The two arched frames 51 on the left and right are partially or completely flattened to the left and right ends of the lower surface of the fixed knife, so that the fixed knife 1 is tightened and fixed on the fixed knife bracket 2 along the two arched frames. The cross section of the fixed knife in this embodiment is generally arched, and the working surface of the fixed knife includes two front and rear inclined surfaces and a top surface with arc connection. For better hair entry, the hair entry grooves on the front and rear inclined surfaces are more densely distributed, and the hair entry grooves on the top surface with arc connection are slightly sparse, and the bottom of the inclined surface is bent inward to form a crimping edge 12, so that the edge of the fixed knife is perfectly hidden, and the safety and aesthetics are higher. The basic shape of the left and right arched frames 51 of the shape support frame of this embodiment is consistent with that of the fixed knife. After the front and rear buckles of the shape support frame are spliced, the two arched frames of the shape support frame are tightened to tension the front and rear inclined surfaces of the fixed knife and even the arc-connected top surface outward. The two arched frames of the shape support frame are used to provide the fixed knife with adaptive micro-elastic moderate support along the periphery by using their own flexibility and elasticity. During operation, the support can adaptively compensate for the distortion of the fixed knife. In order to improve the support stability of the entire shape support frame, the shape support frame includes a transverse connecting frame 55 extending obliquely upward from the front and rear transverse edges of the fixed frame frame, and the transverse connecting frame is flatly supported on the front and rear inner walls of the fixed knife. That is, the metal shape support frame 5 itself is prevented from being deformed, and the stability of the left and right arched frames 51 on the fixed frame frame surface 52 is improved. At the same time, a surrounding support can be formed at the periphery of the fixed knife working area, so that the shape support frame and the fixed knife have a higher fit. The surface of the fixed frame of this embodiment is also provided with a connecting portion 54 extending downward from the left and right edges of the center hole to form a fixed connection with the fixed knife bracket, and the left and right inner walls of the center through hole 23 opened in the center of the fixed knife bracket 2 are provided with buckle parts 24 that cooperate with the connecting portion 54 to achieve a limited connection. The metal support frame 5 is fixed on the fixed knife bracket in a simple buckling manner, without other parts or riveting screw parts, with fewer parts, convenient assembly, reasonable and simple internal structure, and small and compact size.
[0021] This embodiment is to realize the whole machine without riveting and screw parts, so that the internal structure is simpler and convenient for assembly. The fixed knife bracket 2 is formed by two connecting units staggered and fixed on the left and right. The connecting unit includes a base 21 that is generally in the shape of a "7", a fixing ring 22 that is protruded at the end of the base 21 and adapted to the end of the fixed knife, and the base 21 that is generally in the shape of a "7" has a connecting long arm and a connecting short arm. The two connecting units are staggered and fixed by connecting devices on the connecting long arm and the connecting short arm, and a central through hole 23 is formed in the center of the fixed knife bracket 2 for the lower part of the moving knife seat to pass through. The "7"-shaped design can unify the left and right connecting units, that is, the left and right connecting units are not divided into left and right, and can be staggered and assembled. The central through hole is staggered and plugged, which is convenient to install, simple in structure, simplified in processing and saves materials. A "7"-shaped split fixed knife bracket is adopted. The "7"-shaped design of the connecting unit is combined with staggered plug-in fixation, which avoids the center at the plug-in fixation point, ensuring the accuracy of the moving knife mechanism. At the same time, the structure is simple and easy to disassemble and assemble. After the staggered plug-in is completed, the surface is flat or even traceless.
[0022] The movable knife 3 of the present embodiment adopts a "U"-shaped knife with an oblique blade, including a long movable knife supporting surface 34, and two oblique short side knives 31 that are opposite to each other and bent obliquely upward from the front and rear edges of the supporting surface, with cutting blades continuously distributed on the oblique short side knives. There is a spacing between the free ends of the front and rear oblique short side knives, and the two oblique short side knives are partially exposed from the hair entry grooves on the two oblique surfaces of the fixed knife, that is, an open but not surrounded cutting space is formed above the front and rear oblique short side knives, which is convenient for long curly hair to enter and cut neatly without pulling, thereby improving skin feel. Even if the inside of the knife head is not disassembled, the cut hair can be directly poured out from the end holes at both ends of the knife head, which is more convenient, especially when there is a lot of hair, cleaning is more timely, and the operation efficiency is higher.
[0023] The movable knife mechanism of this embodiment is also assembled without riveting and screw parts. The movable knife 3 is symmetrically provided with at least one pair of downward folding connecting pieces 32 of an integral structure with the movable knife. The lower part of the movable knife seat 4 is provided with a driver 41 connected to the transmission mechanism. The downward folding connecting piece of this embodiment can be directly stamped, and the processing is completed in one step, saving materials. The downward folding connecting piece 32 is provided with a limit connection structure that forms a snap connection or buckle connection with the left and right outer side walls of the driver 41. The movable knife mechanism does not require other parts or riveted screw parts, has few parts, is easy to assemble, has a reasonable and concise internal structure, and is small and compact.
[0024] In order to improve the close fit between the moving knife mechanism and the fixed knife mechanism and improve the working efficiency, in this embodiment, a supporting spring piece 6 is further provided on the moving knife seat 4 below the moving knife, and the upper surface of the fixed knife bracket has a plurality of laterally extending ridges 25, and the two ends of the supporting spring piece are crimped on the ridges 25, and the upper surface of the ridges 25 is an arc surface, that is, the supporting spring piece 6 is in line contact with the ridges 25, which reduces friction, and the left and right movement of the supporting spring piece on the fixed knife bracket is smoother, thereby improving the motor efficiency. The supporting spring piece elastically supports the moving knife mechanism to be close to the fixed knife mechanism and can reciprocate left and right relative to the fixed knife mechanism.
[0025] like Figure 4 As shown, a second embodiment of a body hair cutter head structure of the utility model is different from the first embodiment in that the present embodiment adopts a fixed knife with a roughly triangular cross-section, that is, the fixed knife is bent into an angle by front and rear inclined surfaces, and the hair entry groove on the bent top is connected to the hair entry grooves on the front and rear inclined surfaces. The basic shape of the left and right arched frames 51 of the shape support frame of the present embodiment is consistent with the fixed knife. After being spliced with front and rear snaps in front of the shape support frame, the two arched frames of the shape support frame are tightened to tension the front and rear inclined surfaces of the fixed knife outwards smoothly, and the flexibility of the two arched frames of the shape support frame themselves is used to provide the fixed knife with adaptive micro-elastic moderate support along the periphery. During operation, the support can adaptively compensate for the distortion of the fixed knife.
[0026] like Figure 5 As shown, a third embodiment of the body hair cutter head structure of the utility model is different from the first embodiment in that the present embodiment adopts a fixed knife with a substantially trapezoidal cross-section, and an arc protrusion 11 is formed between the upper top surface of the trapezoid and the front and rear inclined surfaces, and the hair entry groove on the arc protrusion connects the hair entry grooves on the upper top surface of the trapezoid and the inclined surfaces, and the arc protrusion has a better hair removal effect. The basic shape of the left and right arch frames 51 of the support frame of the present embodiment is consistent with the fixed knife. Compared with the first and second embodiments, the trapezoidal arch frame has a slightly weaker supporting elasticity but a stronger stability due to the upper short beam, which is conducive to hair removal support.
[0027] The utility model has a reasonable and compact structure, no riveted parts and threaded parts, few parts, smooth surface without burrs, convenient assembly, good skin feel, and an adjustable processing accuracy error space is reserved for the fixed knife mechanism for precise processing.
[0028] Although the utility model has been disclosed as above in terms of specific embodiments, it is not intended to limit the utility model. Any technician in this field can make slight changes and modifications without departing from the spirit and scope of the utility model. Therefore, the scope of protection of the utility model should be determined by the scope of the attached claims.
Claims
1. A body hair razor head structure, comprising a fixed knife mechanism and a moving knife mechanism installed in the fixed knife mechanism, the fixed knife mechanism comprising a bent and arched fixed knife (1) and a fixed knife bracket (2) for fixing the fixed knife (1), the fixed knife (1) is a flexible metal sheet with flexibility, the moving knife mechanism comprises a moving knife (3) placed in the fixed knife mechanism and capable of reciprocating left and right relative to the fixed knife (1), and a moving knife seat (4) on which the moving knife is installed, characterized in that: The fixed knife mechanism further comprises a support member (5) for supporting the shape of the knife net between the fixed knife (1) and the fixed knife bracket (2); the support member (5) is integrally formed and comprises two left and right arched frames (51); a shaped frame surface (52) fixed between the roots of the four corners of the left and right arched frames (51) and snap-jointed to form a supporting plane; a center hole (53) is provided at the center of the shaped frame surface; the support member (5) is pulled forward and backward toward the center under the action of a certain external force, snap-jointed, and welded to form the shaped frame surface (52); the left and right arched frames (51) are partially or completely flattened to the left and right ends of the lower surface of the fixed knife, so that the fixed knife (1) is tightened and fixed on the fixed knife bracket (2) along the two arched frames.
2. The body hair razor head structure according to claim 1, characterized in that: The surface of the shaped chassis also has a connecting portion (54) extending downward from the left and right edges of the center hole to form a fixed connection with the fixed knife bracket, and the left and right inner walls of the center through hole (23) opened in the center of the fixed knife bracket (2) are provided with buckles (24) that cooperate with the connecting portion (54) to achieve a limited connection.
3. The body hair razor head structure according to claim 2, characterized in that: The fixed knife support (2) is formed by two connecting units being staggered and plugged in and fixed in the left and right directions. The connecting units include a base (21) that is generally in the shape of a letter "7", and a fixing ring (22) that is protruded from the end of the base (21) and is adapted to the end of the fixed knife. The base (21) that is generally in the shape of a letter "7" has a connecting long arm and a connecting short arm. The two connecting units are staggered and plugged in and fixed by connecting devices on the connecting long arm and the connecting short arm, and a central through hole (23) is formed in the center of the fixed knife support (2) for the lower part of the movable knife seat to pass through.
4. The body hair razor head structure according to claim 1, 2 or 3, characterized in that: The movable knife (3) comprises a long movable knife support surface, and the front and rear edges of the support surface are bent obliquely upward to form two oblique short side knives (31) facing inward and opposite to each other, the cutting edges of the oblique short side knives are continuously distributed, and there is a gap between the free ends of the front and rear oblique short side knives.
5. The body hair razor head structure according to claim 4, characterized in that: The movable knife (3) is symmetrically provided with at least one pair of downwardly folded connecting pieces (32) of an integral structure with the movable knife. The movable knife seat (4) has a driving element (41) at its lower portion which is transmission-connected to a transmission mechanism. The downwardly folded connecting piece (32) is provided with a limit connection structure which is snap-fitted or buckled with the left and right outer side walls of the driving element (41).
6. The body hair razor head structure according to claim 1, 2 or 3, characterized in that: The shaping support member comprises a transverse connecting frame (55) extending obliquely upward from the front and rear transverse edges of the shaping base frame, and the transverse connecting frame is flatly supported on the front and rear inner walls of the fixed knife.
7. The body hair razor head structure according to claim 4, characterized in that: The shaping support member comprises a transverse connecting frame (55) extending obliquely upward from the front and rear transverse edges of the shaping base frame, and the transverse connecting frame is flatly supported on the front and rear inner walls of the fixed knife.
8. The body hair razor head structure according to claim 5, characterized in that: The shaping support member comprises a transverse connecting frame (55) extending obliquely upward from the front and rear transverse edges of the shaping base frame, and the transverse connecting frame is flatly supported on the front and rear inner walls of the fixed knife.
9. The body hair razor head structure according to claim 1, 2 or 3, characterized in that: A supporting spring sheet (6) is further provided on the movable knife seat (4) below the movable knife. The upper surface of the fixed knife support has a plurality of transversely extending ridges (25). Both ends of the supporting spring sheet are pressed against the ridges (25). The supporting spring sheet elastically supports the movable knife mechanism to be closely attached to the fixed knife mechanism and can reciprocate left and right relative to the fixed knife mechanism.
10. The body hair razor head structure according to claim 4, characterized in that: A supporting spring sheet (6) is further provided on the movable knife seat (4) below the movable knife. The upper surface of the fixed knife support has a plurality of transversely extending ridges (25). Both ends of the supporting spring sheet are pressed against the ridges (25). The supporting spring sheet elastically supports the movable knife mechanism to be closely attached to the fixed knife mechanism and can reciprocate left and right relative to the fixed knife mechanism.