A reciprocating shaver head assembly

Abstract

This utility model discloses a reciprocating shaver head assembly, including a fixed blade, a rigid support, and a reciprocating moving blade assembly. The fixed blade is mounted on the support and includes a skin-contacting piece located at the top for shaving. The skin-contacting piece is an arc-shaped piece or a flat plate structure from left to right, and fixed blade teeth are provided on the skin-contacting piece. The moving blade assembly includes a moving blade and moving blade teeth that can move in a back-and-forth direction. A rigid support fixing part is provided on the support along the arrangement direction of the fixed blade teeth. The support fixing part is located inside the fixed blade teeth and moving blade teeth. The bottom of the skin-contacting piece is attached to the support fixing part and fixed thereto. By providing a support fixing part inside the fixed blade teeth and moving blade teeth for support and fixing the skin-contacting piece, the skin-contacting piece and the corresponding fixed blade teeth are strengthened. This allows the fixed blade to be manufactured with a thinner material and eliminates the support structure directly below the fixed blade teeth, thereby simplifying the structure and reducing costs while maintaining a clean shave.

Description

Technical Field

[0001] This utility model relates to a reciprocating shaver head assembly. Background Technology

[0002] Current reciprocating razors, in order to achieve sufficiently short hair roots and improve shaving cleanliness, typically have a very thin fixed blade, usually less than 0.2mm thick. Their structure usually features fixed cutting teeth on both sides of a fixed blade, and moving cutting teeth on a moving blade. The moving cutting teeth reciprocate and work in conjunction with the fixed cutting teeth to cut the hair. Because the fixed blade is relatively thin and its bottom needs to be flush against the moving blade, it is generally supported by support structures on both sides. Along its length, in addition to the support structures at both ends, support arms are also installed directly below each fixed cutting tooth to support the fixed blade from the tooth. Since the width and spacing of the fixed cutting teeth are relatively small, adding support structures for each tooth complicates the structure and manufacturing process, requires high production precision, and increases manufacturing costs.

[0003] To simplify the structure and process and reduce costs, some reciprocating shaver heads have eliminated the support structure below the fixed cutting teeth. The usual approach is to make the fixed blade very thick to give it sufficient strength, with a thickness usually above 0.4mm. However, this sacrifices the ability to shave cleanly.

[0004] This utility model was made based on this situation. Summary of the Invention

[0005] The technical problem to be solved by this utility model is to provide a reciprocating shaver head assembly, which has the characteristics of simple structure and good shaving effect.

[0006] To solve the above-mentioned technical problems, this utility model provides a reciprocating shaver head assembly, including a fixed blade, a rigid support, and a reciprocating blade assembly. The fixed blade is mounted on the support and includes a skin-contacting piece located at the top for shaving. The skin-contacting piece is an arc-shaped piece or a flat plate structure from left to right. The skin-contacting piece has several rows of fixed blade teeth arranged in the front-back direction. The reciprocating blade assembly includes a moving blade that can move in the front-back direction. The moving blade has moving blade teeth located below the fixed blade teeth. The support has a rigid support fixing part along the arrangement direction of the fixed blade teeth. The support fixing part is located inside the fixed blade teeth and the moving blade teeth. The bottom of the skin-contacting piece is attached to the support fixing part and fixed thereto.

[0007] As described above, in a reciprocating shaver head assembly, the fixed blade is integrally formed from a thin metal plate, the root of the fixed blade teeth is connected to the skin-contacting plate, its outer end is a free end, and it is provided with a thickening head.

[0008] As described above, in a reciprocating shaver head assembly, the skin-contacting pad is integrally stretched and formed with downward-facing edgings at both its front and rear ends. The edgings smoothly transition to the top of the skin-contacting pad. The support has recessed mounting grooves on the outer edges of both its front and rear ends for the edgings to fit into. The outer surface of the edgings is aligned or substantially aligned with the outer surface of the support; or... The front and rear ends of the skin patch are the outer ends of the fixed blade. The front and rear ends of the bracket are integrally formed with support parts that support the front and rear ends of the skin patch from below. The support parts are provided with an upward protrusion on the outer side of the end of the skin patch and a blocking part that blocks the end of the skin patch from the side. The outer surface of the blocking part is smoothly connected and transitioned with the outer surface of the front and rear ends of the bracket.

[0009] As described above, in a reciprocating shaver head assembly, the moving blade is provided with a moving blade mounting hole. The width a of the moving blade mounting hole and the distance b between the outer side walls of the left and right side bracket fixing parts satisfy 0≤ab≤0.10mm. The moving blade is fitted onto the outer side of the bracket fixing part through the moving blade mounting hole. The left and right side walls of the moving blade mounting hole respectively cooperate with the outer side walls of the left and right side bracket fixing parts to guide the moving blade to move back and forth on the bracket.

[0010] As described above, in a reciprocating shaver head assembly, the moving blade is made of a thin metal sheet. The bracket has an upwardly protruding support rib on the outer side of the bracket fixing part. The support rib is located inside the moving blade teeth and supports the moving blade. The moving blade is vertically limited between the support rib and the fixed blade. The gap m between the support rib and the bottom surface of the fixed blade and the material thickness n of the moving blade satisfy 0≤mn≤0.04mm.

[0011] As described above, in a reciprocating shaver head assembly, fixed blades are provided on both the left and right sides of the skin-contacting pad. A bracket fixing part is provided on the inner side of the fixed blades on both the left and right sides. The front and rear ends of the bracket fixing parts on both the left and right sides are connected together. The skin-contacting pad is an arc-shaped structure that bends along the arc K from left to right with its bottom surface. The top surface formed by the bracket fixing part from left to right is formed by grinding along the arc K to create an arc-shaped structure corresponding to the bottom surface of the skin-contacting pad.

[0012] As described above, in a reciprocating shaver head assembly, a shaver head holder is connected to the lower part of the bracket, and front and rear suspension members are fixed to the bottom of the bracket. The shaver head holder is provided with front and rear support arms connected to the front and rear suspension members. The suspension members are provided with downward-facing suspension grooves, and the upper ends of the support arms are inserted into the suspension grooves. The upper ends of the suspension members and the support arms are rotatably connected by a pin, allowing the bracket to rotate on the shaver head holder. A torsion spring is sleeved on the pin for directly or indirectly driving the bracket to rotate and return to its original position.

[0013] As described above, a reciprocating shaver head assembly includes a head holder body connecting two arms. The head holder body has an inner cavity extending through both the upper and lower ends. A swing arm is disposed in the inner cavity. The middle part of the swing arm is rotatably connected to a swing arm bracket via a pivot. The swing arm bracket is fixed in the inner cavity. The moving blade is mounted on a moving blade bracket. The moving blade bracket is provided with a drive mounting groove having four side walls. The upper end of the swing arm is provided with a spherical drive head inserted into the drive mounting groove. The central axes of the two pins corresponding to the front and rear arms are concentric or substantially concentric with the center of the spherical drive head.

[0014] As described above, in a reciprocating shaver head assembly, a magnetic ring is fixed in the inner cavity below a swing arm, with the lower end of the swing arm facing the central hole of the magnetic ring.

[0015] As described above, in a reciprocating shaver head assembly, the suspension member has hanging holes on both the front and rear sides of the suspension groove for a pin to pass through. The pin has a large end with an outer diameter larger than the hanging hole. The large end of the pin is located outside the suspension member and between the front and rear suspension members. A torsion spring is sleeved on the large end of the pin. A bottom cover is installed between the front and rear suspension members. The end of the bottom cover is attached to or close to the large end of the pin and restricts the pin from moving towards its large end. Or The suspension components have hanging holes on the front and rear sides of the suspension groove for the pin to pass through. The hanging holes on the inner and outer sides of the support arm are smaller on the outer side than on the inner side. The pin has a small end that mates with the outer hanging hole. The upper end of the support arm has a shaft hole that mates with the pin. The support arm has a column protruding to the side around the outside of the shaft hole. The torsion spring is sleeved on the column and installed in the suspension groove. A bottom cover is provided between the front and rear suspension components. The end of the bottom cover is attached to or close to the pin and restricts the pin from moving inward toward the support arm.

[0016] In the reciprocating shaver head assembly described above, the bracket and suspension are separate metal parts and are fixed by welding.

[0017] In the reciprocating shaver head assembly described above, the bracket and the bracket fixing part are made of metal, and the skin-contacting patch is welded and fixed to the bracket fixing part.

[0018] As described above, in a reciprocating shaver head assembly, the skin-contacting patch is welded from top to bottom to the bracket fixing part, and the weld point between the two is located on the surface of the skin-contacting patch. A cover is provided above the skin-contacting patch to cover the weld point.

[0019] As described above, in a reciprocating shaver head assembly, the bracket has a central hole along its length in the middle, the bracket fixing part is located outside the central hole, the skin-contacting pad has a fixed blade central hole corresponding to the central hole of the bracket, the cover is an annular structure, including a cover ring and an inner wall of the cover extending downward from the inner side of the cover ring and inserted into the fixed blade central hole and the central hole of the bracket, the inner wall of the cover is close to the hole wall of the central hole of the bracket and fixed to the bracket, the cover ring covers the skin-contacting pad around the outer side of the fixed blade central hole, the inner side of the cover is provided with a blade screen, and the moving blade assembly includes a central blade located below the blade screen.

[0020] As described above, in a reciprocating shaver head assembly, the cover is a metal part, the blade mesh is welded and fixed to the inner wall of the cover, and the inner wall of the cover is welded and fixed to the wall of the middle hole of the bracket.

[0021] In the reciprocating shaver head assembly described above, the outer edge of the cover ring extends outward from the outside of the bracket fixing part and is located inside the fixed blade teeth, and the outer edge of the cover ring presses against the skin-contacting sheet.

[0022] In order to achieve the cutting function at the center of the skin-contacting pad, the reciprocating shaver head assembly described above can, in addition to setting a blade mesh at the center of the skin-contacting pad, also have mesh holes set at the center of the skin-contacting pad. The fixed blades are set on the left and right sides of the skin-contacting pad, and the moving blade assembly includes a middle blade located below the center of the skin-contacting pad.

[0023] As described above, in a reciprocating shaver head assembly, a movable blade support is provided below the intermediate blade, the intermediate blade is mounted on the movable blade support, the movable blade support is provided with a drive mounting groove, a spring piece that can elastically deform up and down is provided above the drive mounting groove on the movable blade support, and a drive member is provided below the movable blade support to drive its reciprocating motion back and forth. One end of the drive member is inserted into the drive mounting groove and presses the spring piece upward to deform it, so as to provide an elastic force that presses the movable blade support together with the intermediate blade upward; furthermore, the drive member is a swingable lever, and a spherical drive head is provided at its upper end.

[0024] As described above, in a reciprocating shaver head assembly, a moving blade support is provided under the intermediate blade, the intermediate blade is mounted on the moving blade support, the moving blade support is installed in the middle hole of the support, the moving blade has a moving blade mounting hole on the inner side of the moving blade teeth, the moving blade is sleeved on the outer side of the support fixing part through the moving blade mounting hole, the moving blade has a moving blade connecting part that extends into the middle hole of the support from the left and right sides and connects with the moving blade support, and the support fixing part has a clearance opening to avoid the moving blade connecting part; Furthermore, the moving blade is made of a thin metal sheet, and the bracket has an upwardly protruding support bone on the outside of the bracket fixing part. The support bone is located outside the moving blade mounting hole and close to the moving blade teeth. The support bone and the fixed blade limit the moving blade teeth vertically. The height difference between the bottom of the blade mesh and the bottom of the fixed blade teeth is less than the height difference between the top of the intermediate blade and the top of the moving blade teeth. The intermediate blade and the moving blade bracket are pressed down by the blade mesh, and the moving blade connecting part is pressed down. The moving blade uses the support bone as a fulcrum to raise the moving blade teeth upward and attach them to the fixed blade teeth; or the height difference between the bottom of the skin patch in the area corresponding to the mesh and the bottom of the fixed blade teeth is less than the height difference between the top of the intermediate blade and the top of the moving blade teeth. The intermediate blade and the moving blade bracket are pressed down by the skin patch in the area corresponding to the mesh, and the moving blade connecting part is pressed down. The moving blade uses the support bone as a fulcrum to raise the moving blade teeth upward and attach them to the fixed blade teeth.

[0025] In the reciprocating shaver head assembly described above, in addition to welding the skin-contacting patch to the bracket fixing part, a cover ring can also be directly provided above the skin-contacting patch to press and fix it onto the bracket fixing part, and the cover ring is fixedly connected to the bracket; or The skin patch has multiple through holes above the bracket fixing part along the arrangement direction of the fixed blade teeth. A fixing element is provided at the position of the through hole. The lower end of the fixing element passes through the through hole and is fixed to the bracket. The upper end of the fixing element has an umbrella-shaped head that is larger than the through hole and presses on the skin patch so that the skin patch is pressed on the bracket fixing part. The outer surface of the umbrella-shaped head is smooth. Further, the fixing element is a plastic part fixed on the bracket or the fixing element is a metal rivet.

[0026] Compared with the prior art, the present invention has the following advantages: 1. This utility model strengthens the skin-fitting patch and corresponding fixed teeth by providing a support fixing part on the inner side of the fixed and moving blade teeth. This allows the fixed blade to be made of a thinner material and eliminates the support structure directly below the fixed blade teeth, thereby simplifying the structure and reducing costs while maintaining a clean shave. To further improve the strength of the skin-fitting patch and corresponding fixed blade teeth on the outer side of the support fixing part, the distance d between the support fixing part and the root of the fixed blade teeth is between 0.4mm and 1.5mm. When the support fixing part reinforces the part of the skin-fitting patch connected to the fixed blade teeth, preferably, the fixed blade is integrally formed from a thin metal plate, with the root of the fixed blade teeth connected to the skin-fitting patch and its outer end being a free end. This simple structure facilitates hair removal and cleaning. The outer end of the fixed blade teeth is provided with a thickening head to prevent the thin fixed blade teeth from irritating the skin. The thickening head can be formed by laser sintering the outer end of the fixed blade teeth to increase skin feel.

[0027] 2. The skin-adhesive patch of this utility model can be welded to the bracket fixing part from top to bottom, and the weld points are covered by a cover. The welding is simple and convenient, avoiding the weld points from being exposed and contacting the skin, and avoiding affecting the appearance. The cover is a metal part, and the blade mesh is welded and fixed to the inner wall of the cover. The inner wall of the cover is welded and fixed to the wall of the hole in the middle of the bracket. The cover serves to cover the weld points and also to install and fix the blade mesh, resulting in a simple structure.

[0028] 3. The bracket fixing part is located outside the middle hole of the bracket. The cover is ring-shaped, and its inner wall passes through the middle hole of the fixed blade and the middle hole of the bracket from top to bottom and is fixed to the bracket. The cover ring on it covers the skin-contacting piece around the outer side of the middle hole of the fixed blade. The outer surface of the cover ring is smooth so as to improve the skin feel when moving on the skin during shaving. The inner side of the cover is provided with a foil and a middle blade, so that the reciprocating shaver head assembly has a middle cutting structure. The foil can be made of a thinner material than the fixed blade to improve the shaving cleanliness. The skin-contacting piece outside the bracket fixing part is fixed by the bracket fixing part. The fixed blade teeth are set on the skin-contacting piece outside the bracket fixing part. The bracket fixing part is provided with a middle hole of the bracket inside the bracket fixing part for installing the foil to increase the middle cutting, thereby isolating the foil and the fixed blade teeth on the inner and outer sides of the bracket fixing part to avoid mutual interference between the foil and the fixed blade teeth.

[0029] 4. The skin patch of this utility model can be fixed to the fixing part of the bracket by a fixing element. The upper end of the fixing element is provided with an umbrella-shaped head that presses on the skin patch so that the skin patch is pressed on the fixing part of the bracket. The outer surface of the umbrella-shaped head is smooth and it protrudes above the skin patch. When the skin patch moves on the skin, the umbrella-shaped head can also be used to massage the skin, making it comfortable to use.

[0030] 5. The moving blade is fitted onto the outside of the bracket fixing part through the moving blade mounting hole. The width 'a' of the moving blade mounting hole and the distance 'b' between the outer walls of the left and right bracket fixing parts satisfy 0 ≤ ab ≤ 0.10 mm. The left and right hole walls of the moving blade mounting hole respectively mate with the outer walls of the left and right bracket fixing parts to guide the moving blade's back-and-forth movement on the bracket. The structure is simple, avoiding the use of other guiding components that would increase volume. The moving blade bracket is installed in the middle hole of the bracket. The bracket fixing part has a clearance opening. The moving blade has a moving blade connecting part that extends into the middle hole of the bracket through the clearance opening and connects to the moving blade bracket. The middle blade is mounted on the moving blade bracket from above, and the moving blade is laterally connected to the moving blade bracket, so that the moving blade bracket simultaneously drives the middle blade and the moving blade to reciprocate. The structure is simple and helps to reduce space volume.

[0031] 6. The skin patch is an arc-shaped structure that bends along curve K from left to right with its bottom surface. The top surface of the support fixing part formed from left to right is ground along curve K to form an arc-shaped structure corresponding to the bottom surface of the skin patch, which helps the skin patch better maintain the designed curve shape. The fixed blade teeth form a continuous arc structure with the skin patch. When the gap m between the support bone and the bottom surface of the fixed blade and the material thickness n of the moving blade are kept at 0≤mn≤0.04mm, the tip of the moving blade teeth is closer to the fixed blade teeth, so that the tip of the tooth closer to the moving blade teeth has better cutting sharpness. The moving blade is limited vertically between the support bone and the fixed blade, located on the outside of the support fixing part. The moving blade strengthens the skin patch and the fixed blade teeth that extend from the outside of the support fixing part from the bottom, preventing the fixed blade teeth from deforming downward. Attached Figure Description

[0032] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, wherein: Figure 1 This is a schematic diagram of the structure of a reciprocating shaver head assembly according to the present invention; Figure 2 This is a perspective view of a reciprocating shaver head assembly according to the present invention; Figure 3 This is a top view of one embodiment of a reciprocating shaver head assembly according to the present invention; Figure 4 This is an exploded view of a reciprocating shaver head assembly according to this utility model; Figure 5 yes Figure 1 A cross-sectional view along the AA direction; Figure 6 yes Figure 5 A cross-sectional view along the BB direction; Figure 7 This is a schematic diagram of the structure of the skin patch being fixed to the support fixing part by fixing elements; Figures 7a-7b These are two different embodiments of fixing elements. Figure 7 A cross-sectional view along the CC direction; Figure 8 This is a schematic diagram of an embodiment in which a mesh is directly provided in the middle of the skin patch; Figure 9 This is a schematic diagram of an embodiment of the present invention: a reciprocating shaver head assembly without intermediate cutting function; Figure 10 This is a structural schematic diagram of one embodiment of the support and the cutter head holder; Figure 11 yes Figure 10 A cross-sectional view along the DD direction; Figure 12This is a schematic diagram of the structure of the skin-adhesive piece on the fixed blade, which is an arc-shaped piece from left to right; Figure 13 This is a schematic diagram showing that the top surface of the support fixing part is an arc-shaped structure corresponding to the bottom surface of the skin patch; Figure 14 This is a structural diagram of an embodiment that restricts the movement of the blade by supporting the bone position and fixing the blade vertically; Figure 15 This is a schematic diagram of an embodiment in which a flat skin-adhesive patch and a support fixing part are combined. Figure 16 This is an exploded view of an embodiment of a reciprocating shaver head assembly of the present invention, in which the front and rear ends of the fixed blade do not have edging. Figure 17 yes Figure 16 A perspective view of the embodiment; Figure 18 yes Figure 16 Top view of the Chinese embodiment; Figure 19 yes Figure 18 A cross-sectional view along the EE direction; Figure 20 This is a schematic diagram of the machining process for the arc-shaped top surface of the bracket fixing part. Detailed Implementation

[0033] The present invention will be further described below with reference to the accompanying drawings: like Figure 1-19 The diagram illustrates a reciprocating shaver head assembly, comprising a fixed blade 1, a rigid support 2, and a reciprocating moving blade assembly. The fixed blade 1 is mounted on the support 2 and includes a skin-contacting plate 11 located at the top for shaving. The skin-contacting plate 11 is an arc-shaped plate or flat plate structure from left to right, and has several rows of fixed blade teeth 12 arranged in a front-back direction. The moving blade assembly includes a moving blade 31 that can move in a front-back direction, and the moving blade 31 has moving blade teeth 311 located below the fixed blade teeth 12. The support 2 has a reciprocating moving blade assembly. The fixed blade teeth 12 are arranged in a rigid bracket fixing part 21. The bracket fixing part 21 is located inside the fixed blade teeth 12 and the moving blade teeth 311. The bottom of the skin-contacting piece 11 is attached to the bracket fixing part 21 and fixed thereto. The skin-contacting piece 11 is fixed to the bracket fixing part 21 from the inside of the fixed blade teeth 12, which strengthens the skin-contacting piece 11 and the corresponding fixed blade teeth 12. This allows the fixed blade to be made of a thinner material and eliminates the support structure directly below the fixed blade teeth 12, thereby simplifying the structure and reducing costs while maintaining a clean shave.

[0034] like Figure 14As shown, the distance d between the support fixing part 21 and the root of the fixed blade tooth 12 is between 0.4mm and 1.5mm. d is less than 1.5mm to better reinforce the skin patch 11 and the fixed blade tooth 12 on the outside of the support fixing part 21. The smaller d is, the better the strength of the skin patch 11 and the fixed blade tooth 12 on the outside of the support fixing part 21. The root of the moving blade tooth 311 is located inside the root of the fixed blade tooth 12. d is greater than 0.4mm to retain the material width between the moving blade 31 on the outside of the support fixing part 21 and the root of the moving blade tooth 311, so as to ensure the structural strength of the moving blade tooth 311 connected to the moving blade 31. More preferably, d is between 0.6mm and 1.0mm.

[0035] The rigidity in the rigid support 2 here refers to the structural characteristics that are the opposite of elasticity and softness, meaning that it can maintain its shape and is not easily bent or twisted when subjected to load.

[0036] When the support fixing part 21 reinforces the part of the skin patch 11 connected to the fixed blade tooth 12, preferably, the fixed blade 1 is integrally formed from a thin metal plate, the root of the fixed blade tooth 12 is connected to the skin patch 11, its outer end is a free end, and it is provided with a thickening head 14. The thickening head 14 increases the skin feel, the structure is simple, and it is conducive to hair removal and cleaning.

[0037] Preferably, the bracket 2 and the bracket fixing part 21 are made of metal, and the skin patch 11 is fixed to the bracket fixing part 21 by laser welding.

[0038] Preferably, such as Figure 2-6 In the embodiment shown, the skin patch 11 is welded from top to bottom to the bracket fixing part 21, and the weld point between the two is located on the surface of the skin patch 11. The welding method is simple. A cover 4 is provided above the skin patch 11 to cover the weld point, so as to prevent the weld point from being exposed and contacting the skin and affecting the appearance.

[0039] Preferably, the bracket 2 has a central hole 22 along its length in the middle, the bracket fixing part 21 is disposed on the outside of the central hole 22, the skin-adhesive patch 11 has a fixed blade central hole 13 corresponding to the central hole 22 in the middle, the cover 4 has an annular structure, including a cover ring 41 and an inner wall 42 of the cover 41 extending downward from the inside of the cover ring 41 and inserted into the fixed blade central hole 13 and the central hole 22 of the bracket. The outer surface of the cover ring 41 is smooth to improve the skin feel when it is attached to the skin during shaving. The inner wall 42 of the cover 42 is close to the hole wall of the central hole 22 of the bracket and is fixed to the bracket 2. The cover ring 41 surrounds the fixed blade central hole 13. The outer side of the cover 3 covers the skin-adhesive sheet 11. The inner side of the cover 4 is provided with a blade net 5. The moving blade assembly includes a middle blade 32 located below the blade net 5. The middle blade 32 and the blade net 5 cooperate to give the reciprocating shaving head assembly a central cutting structure. The blade net 5 can be made of a thinner material than the fixed blade 1 to improve shaving cleanliness. Preferably, the fixed blade 1 is made of a thin plate of 0.10mm to 0.25mm, and the blade net 5 is made of a thin sheet of less than 0.10mm. More specifically, the fixed blade 1 is made of a thin plate of 0.15mm to 0.2mm, and the blade net 5 is made of a thin sheet of 0.05mm to 0.08mm.

[0040] The skin patch 11 on the outside of the bracket fixing part 21 is fixed by the bracket fixing part 21. The fixed blade 12 is set on the skin patch 11 on the outside of the bracket fixing part 21. The bracket middle hole 22 is provided on the inner side of the bracket fixing part 21 and is used to install the blade net 5 to increase the middle cutting. In this way, the blade net 5 and the fixed blade 12 are isolated on the inner and outer sides of the bracket fixing part 21, so as to avoid mutual interference between the blade net 5 and the fixed blade 12.

[0041] Of course, the fixation of the skin patch 11 and the bracket fixing part 21 can also be done in a non-welding manner. For example, a cover ring 41 is provided above the skin patch 11 to press the skin patch 11 onto the bracket fixing part 21 for fixation. The cover ring 41 is fixedly connected to the bracket 2, and the skin patch 11 is pressed and fixed onto the bracket fixing part 21 by the cover ring 41.

[0042] Preferably, the cover 4 is a metal part, and the blade mesh 5 is welded and fixed to the inner wall 42 of the cover. The inner wall 42 of the cover is welded and fixed to the hole wall of the middle hole 22 of the bracket. The cover 4 can cover the welding point on the one hand and is used to install and fix the blade mesh 5 on the other hand, which has a simple structure.

[0043] Furthermore, such as Figure 5As shown, the outer edge of the cover ring 41 extends out of the outside of the bracket fixing part 21 and is located inside the fixed blade tooth 12. The outer edge of the cover ring 41 presses on the skin patch 11, which can better prevent the outer side of the skin patch 11, including the fixed blade tooth 12, from deforming upward, so that the moving blade tooth 311 below can better fit close to the fixed blade tooth 12 for cutting.

[0044] Regarding the central cutting structure of the reciprocating shaver head assembly, it can, of course, be like... Figure 7 and Figure 8 In the embodiment shown, the fixed blade teeth 12 are disposed on the left and right sides of the skin patch 11, and the skin patch 11 is provided with a mesh 16 in the middle. The moving blade assembly includes a middle blade 32 disposed below the middle of the skin patch 11. When the middle blade 32 reciprocates, it cuts off the hair that enters from the mesh 16.

[0045] Preferably, such as Figure 5 and Figure 6 As shown, a movable blade support 33 is provided below the intermediate blade 32, and the intermediate blade 32 is mounted on the movable blade support 33. The movable blade support 33 is provided with a drive mounting groove 331. Above the drive mounting groove 331, there is a spring piece 34 on the movable blade support 33 that can elastically deform up and down. Below the movable blade support 33, there is a drive member that drives it to reciprocate back and forth. One end of the drive member is inserted into the drive mounting groove 331 and pushes the spring piece 34 upward to deform it, so as to provide an elastic force that pushes the movable blade support 33 together with the intermediate blade 32 upward. The structure is simple and easy to reduce the space volume. The intermediate blade 32 is close to the bottom of the blade mesh 5 or the bottom of the skin patch 11 corresponding to the mesh hole 16 area to perform reciprocating motion, thereby improving the sharpness of the cut.

[0046] Preferably, the driving component is a swing rod 6, the upper end of which is provided with a spherical driving head 61 inserted into the driving mounting groove 331. When the swing rod 6 swings, one function is to ensure that the upper end of the swing rod has a stable engagement with the front and rear groove walls of the driving mounting groove 331, thereby driving the moving knife support 33 to reciprocate back and forth. The other function is to prevent large fluctuations in the deformation of the upward pressing spring 34 when the upper end of the swing rod swings and changes position.

[0047] Preferably, such as Figure 4 , 14As shown in Figure 15, the moving blade support 33 is installed in the middle hole 22 of the support. The moving blade 31 has a moving blade mounting hole 312 on the inner side of the moving blade tooth 311. The moving blade 31 is sleeved on the outer side of the support fixing part 21 through the moving blade mounting hole 312. The moving blade 31 has a moving blade connecting part 313 that extends into the middle hole 22 of the support from the left and right sides and connects with the moving blade support 33. The support fixing part 21 has a clearance opening 23 to avoid the moving blade connecting part 313. The middle blade 32 is installed on the moving blade support 33 from above, and the moving blade 31 is laterally connected to the moving blade support 33, so that the moving blade support 33 drives the middle blade 32 and the moving blade 31 to reciprocate. The structure is simple and helps to reduce the space volume.

[0048] Furthermore, the moving blade 31 is made of a thin metal sheet. The bracket 2 has an upwardly protruding support rib 24 located outside the bracket fixing part 21. The support rib 24 is located outside the moving blade mounting hole 312 and close to the moving blade tooth 311. The support rib 24 and the fixed blade 1 vertically limit the moving blade tooth 311. The height difference between the bottom of the blade net 5 and the bottom of the fixed blade tooth 12 is less than the height difference between the top of the intermediate blade 32 and the top of the moving blade tooth 311. The intermediate blade 32 and the moving blade bracket 33 are pressed downwards by the blade net 5, which also presses the moving blade connecting part 313 downwards. The moving blade 31... Using the supporting bone position 24 as a fulcrum, the moving blade tooth 311 is tilted upwards and attached to the fixed blade tooth 12. Alternatively, the height difference between the bottom of the skin patch 11 in the area corresponding to the mesh 16 and the bottom of the fixed blade tooth 12 is less than the height difference between the top of the intermediate blade 32 and the top of the moving blade tooth 311. The intermediate blade 32 and the moving blade support 33 are pressed down by the skin patch 11 in the area corresponding to the mesh 16, and the moving blade connection part 313 is pressed down. The moving blade 31 uses the supporting bone position 24 as a fulcrum to tilt the moving blade tooth 311 upwards and attach it to the fixed blade tooth 12, thereby improving the sharpness of the cutting action of the moving blade tooth 311 and the fixed blade tooth 12.

[0049] Preferably, such as Figure 14 and Figure 15 As shown, the supporting bone position 24 is located inside the moving blade tooth 311 and supports the moving blade 31. The gap m between the supporting bone position 24 and the bottom surface of the fixed blade 1, and the material thickness n of the moving blade 31, satisfy 0≤mn≤0.04mm. The moving blade 31 is vertically limited between the supporting bone position 24 and the fixed blade 1, and is located outside the bracket fixing part 21. The moving blade strengthens the skin patch 11 and the fixed blade tooth 12 that extend outside the bracket fixing part 21 from below, preventing the fixed blade tooth 12 from deforming downward.

[0050] Preferably, such as Figure 14As shown, the skin patch 11 has fixed blades 12 on both the left and right sides, and bracket fixing parts 21 are respectively provided on the inner side of the fixed blades 12 on the left and right sides. The front and rear ends of the bracket fixing parts 21 on the left and right sides are connected together, as shown. Figure 12 As shown, the skin patch 11 is an arc-shaped structure that bends along arc K from left to right with its bottom surface, as shown. Figure 13 As shown, the top surface of the support fixing part 21 from left to right is formed by grinding along an arc-shaped curve K to create an arc-shaped structure corresponding to the bottom surface of the skin patch 11. This helps the skin patch 11 better maintain the designed curved shape. Preferably, the radius R of the arc K is between 30mm and 100mm. The fixed blade 12 and the skin patch 11 form a continuous arc-shaped structure. When the gap m between the supporting bone position 24 and the bottom surface of the fixed blade 1, and the material thickness n of the moving blade 31, are kept at 0≤mn≤0.04mm, the tip of the moving blade 311 is closer to the fixed blade 12, resulting in better cutting sharpness for the tip of the moving blade 311.

[0051] like Figure 4 As shown, the width a of the moving blade mounting hole 312 and the distance b between the outer walls 211 of the left and right side bracket fixing parts 21 satisfy 0≤ab≤0.10mm. The moving blade 31 is fitted onto the outside of the bracket fixing part 21 through the moving blade mounting hole 312. The left and right side holes of the moving blade mounting hole 312 respectively cooperate with the outer walls 211 on the left and right side bracket fixing parts 21 to guide the moving blade 31 to move back and forth on the bracket 2. The structure is simple and avoids the use of other guiding components to increase the volume.

[0052] Regarding the method of fixing the skin patch 11 to the bracket fixing part 21, it can also be as follows: Figure 7-7b In the illustrated embodiment, the skin patch 11 has multiple through holes 17 arranged along the direction of the fixed teeth 12 above the support fixing part 21. A fixing element 7 is provided at the position of each through hole 17. The lower end of the fixing element 7 passes through the through hole 17 and is fixed to the support 2. Its upper end has an umbrella-shaped head 71 that is larger than the through hole 17 and presses against the skin patch 11, causing the skin patch 11 to press against the support fixing part 21. The outer surface of the umbrella-shaped head 71 is smooth, and it protrudes above the skin patch 11. When the skin patch 11 moves on the skin, the umbrella-shaped head 71 can also be used to massage the skin. Figure 7a As shown, the fixing element 7 is a plastic part fixed on the bracket 2. During installation, the fixing element 7 is a column shape that allows the through hole 17 to be inserted from above, and the upper end of the fixing element 7 is pressed into an umbrella-shaped head 71 by a contoured hot press head with a concave bottom, pressing it onto the skin patch 11; or as shown Figure 7b As shown, the fixing element 7 is a metal rivet, which is fixed by being driven into the bracket fixing part 21 and pressing the umbrella-shaped head 71 of the rivet onto the skin patch 11.

[0053] like Figure 1 and Figure 10 As shown, a blade holder 8 is connected to the lower part of the bracket 2. Front and rear suspension members 2a are fixed to the bottom of the bracket 2. Front and rear support arms 81 connected to the front and rear suspension members 2a are provided on the blade holder 8. The suspension member 2a is provided with a downward-facing suspension groove 2a1. The upper end of the support arm 81 is inserted into the suspension groove 2a1. The upper ends of the suspension member 2a and the support arm 81 are rotatably connected by a pin 2b, so that the bracket 2 can rotate on the blade holder 8. A torsion spring 2c is sleeved on the pin 2b for directly or indirectly driving the bracket 2 to rotate and return to its original position, so that the skin patch can better adhere to the skin during shaving.

[0054] The cutter head holder 8 includes a cutter head holder body 84 connecting two arms 81. The cutter head holder body 84 has an inner cavity 85 extending through both the upper and lower ends. A rocker arm 6 is disposed in the inner cavity 85. The middle part of the rocker arm 6 is rotatably connected to a rocker arm bracket 87 via a rotating shaft 86. The rocker arm bracket 87 is fixed in the inner cavity 85. The moving blade 31 is mounted on a moving blade support 33. The moving blade support 33 is provided with a drive mounting groove 331 with four side walls. The upper end of the rocker arm 6 is provided with a spherical drive head 61 inserted into the drive mounting groove 331. Figure 6 As shown, the central axis L of the two pins 2b corresponding to the front and rear support arms 81 is concentric or substantially concentric with the center O of the spherical drive head 61. When the bracket 2, together with the fixed blade 1, the moving blade 31 and the moving blade bracket 33 mounted on it, rotates relative to the blade head holder 8, the moving blade bracket 33 can rotate substantially around the center O of the spherical drive head 61. This allows the spherical drive head 61 to insert into the drive mounting groove 331 to a certain depth to ensure reliable linkage between the moving blade bracket 33 and the swing arm 6. At the same time, it makes it less likely for the front and rear walls of the drive mounting groove 331 to interfere with the swing arm 6, thereby reducing the width between the front and rear side walls of the drive mounting groove 331 and the width and volume of the entire moving blade bracket 33.

[0055] To facilitate the magnetic attachment of the reciprocating shaver head assembly to the handle, such as Figure 5 As shown, a magnetic ring 10 is fixed in the inner cavity 85 below the swing rod 6. The lower end of the swing rod 6 faces the central hole of the magnetic ring 10 so that the swing rod 6 can avoid the magnetic ring 10 when swinging, and the eccentric wheel connected to the motor shaft passes through the central hole of the magnetic ring 10 and connects with the lower end of the swing rod 6 for transmission.

[0056] like Figure 1 and Figure 6In the embodiment shown, the suspension member 2a is provided with hanging holes 2a2 on both the front and rear sides of the suspension groove 2a1 for the pin 2b to pass through. The pin 2b has a large end with an outer diameter larger than the hanging hole 2a2. The large end of the pin 2b is located outside the suspension member 2a and between the front and rear suspension members 2a. The torsion spring 2c is sleeved on the large end of the pin 2b. A bottom cover 9 is installed between the front and rear suspension members 2a. The end of the bottom cover 9 is attached to or close to the large end of the pin 2b and restricts the pin 2b from moving to the side of its large end.

[0057] In another implementation, such as Figure 10 and Figure 11 As shown, the suspension member 2a has hanging holes 2a2 on the front and rear sides of the suspension groove 2a1 for the pin 2b to pass through. The hanging holes 2a2 on the inner and outer sides of the support arm 81 are smaller on the outer side than on the inner side. The pin 2b has a small end that mates with the outer hanging hole 2a2. The upper end of the support arm 81 has a shaft hole 82 that mates with the pin 2b. The support arm 81 has a column 83 protruding to the side around the outer side of the shaft hole 82. The torsion spring 2c is sleeved on the column 83 and installed in the suspension groove 2a1. A bottom cover 9 is provided between the front and rear suspension members 2a. The end of the bottom cover 9 is attached to or close to the pin 2b and restricts the pin 2b from moving inward toward the support arm 81. The structure is simple and easy to install.

[0058] like Figure 4 In the illustrated embodiment, the bracket 2 and the suspension member 2a are independent metal parts and are fixed by welding. Separating the suspension member 2a from the bracket 2 facilitates making the bottom of the bracket 2 flat. During manufacturing, the bottom of the bracket 2 can be first ground into a flat surface to achieve better flatness. Then, using the bottom plane as a positioning reference, the bracket fixing part 21 is ground into an arc-shaped structure from left to right, following the arc line K, to better ensure the arc shape of the top surface of the bracket fixing part 21. The arc surface is ground following the arc line K, as shown... Figure 20 As shown, multiple supports 2 are fixed around the circumference of a turntable 101 on its outer side. A grinding wheel 102 is positioned on the radial side of the turntable 101. The turntable 101 and the grinding wheel 102 can be relatively close or far apart. When the turntable 101 approaches the grinding wheel 102, the support fixing part 21 on the support 2 contacts the grinding wheel 102 for grinding. The rotation of the turntable 101 grinds the support fixing part 21 into an arc shape according to a set radius R. After grinding one support 2, the turntable 101 rotates to allow the next support 2 to continue grinding against the grinding wheel 102 until the turntable 101 has rotated one revolution and the support 2 on the outer side has been processed. This process is highly efficient, and the arc-shaped top surface of the support fixing part 21 is processed with good consistency.

[0059] Preferably, a plurality of grooves 103 for mounting the bracket 2 are provided on the turntable 101 in a circumferential direction. The bracket 2 is inserted into the groove and fixed in place. The fixing method can be magnetic attraction or negative pressure to fix the bracket 2 in the groove.

[0060] Of course, such as Figure 19 As shown, the bracket 2 and the suspension member 2a can also be integrally formed of metal.

[0061] To improve the skin feel at both ends of the reciprocating shaver head assembly, such as Figure 2-15 In one embodiment shown, the skin patch 11 has edgings 15 integrally stretched downwards at both ends. The edgings 15 smoothly transition to the top of the skin patch 11. The bracket 2 has recessed mounting grooves 25 on the outer edges at both ends for the edgings 15 to fit into. The outer side of the edgings 15 is aligned or substantially aligned with the outer side of the bracket 2. This reciprocating shaver head assembly has good smoothness from the top to the side at both ends and has a simple structure. like Figure 16-19 As shown, in another embodiment, the front and rear ends of the skin patch 11 are the outer ends of the fixed blade 1. The front and rear ends of the bracket 2 are integrally formed with support portions 26 that support the front and rear ends of the skin patch 11 from below. The support portion 26 is provided with a shielding portion 27 that protrudes upward and blocks the end of the skin patch 11 from the side on the outer side of the end of the skin patch 11, so as to avoid the front and rear ends of the skin patch 11 from contacting and irritating the skin. The outer surface of the shielding portion 27 is smoothly connected and transitioned with the outer surface of the front and rear ends of the bracket 2. The reciprocating shaver head assembly has good smoothness from the top surface to the side and has a simple structure.

[0062] Preferably, the bracket 2 is made of powder metallurgy, the bracket fixing part 21 is integrally formed when the bracket 2 is formed, and the structures corresponding to the bracket middle hole 22, the clearance opening 23, the support bone position 24 and / or the mounting groove 25 are integrally injection molded when the bracket 2 is injection molded, so that the bracket integrates multiple functional structures while reducing the volume and simplifying the manufacturing process.

[0063] A method for manufacturing a reciprocating shaver head assembly includes the following steps: A. The support 2 is manufactured by powder metallurgy, including the integral injection molding of a support preform with a support fixing part 21 and a supporting bone position 24 by metal powder, and the support preform is degreased and then sintered. B. The top surface of the profile grinding support fixing part 21, such as Figure 20As shown, multiple supports 2 are fixed around the circumference of the turntable 101 on the outer side of the turntable. A grinding wheel 102 is set on the outer side of the turntable 101 in the radial direction. The turntable 101 and the grinding wheel 102 can be relatively close or far apart. When the turntable 101 approaches the grinding wheel 102, the support fixing part 21 on the support 2 contacts the grinding wheel 102 for grinding. The turntable 101 rotates so that the support fixing part 21 is ground into an arc shape according to a set radius R. After grinding one support 2, the turntable 101 rotates so that the next support 2 continues to be ground against the grinding wheel 102 until the turntable 101 rotates one revolution and the support 2 on the outer side is processed. C. The movable knife 31 with the movable knife mounting hole 312 is fitted from top to bottom onto the outside of the bracket fixing part 21 and supported on the support bone position 24. The width a of the movable knife mounting hole 312 and the distance b between the outer side walls 211 of the left and right bracket fixing parts 21 satisfy 0≤ab≤0.10mm. The left and right side walls of the movable knife mounting hole 312 respectively cooperate with the outer side walls 211 on the left and right bracket fixing parts 21 to guide the movable knife 31 to move back and forth on the bracket 2. D. Use a thin metal sheet to etch fixed blade teeth 12 on its left and right sides, and stamp it to form a fixed blade 1, so that the fixed blade teeth 12 and the skin patch 11 on its inner side form a continuous arc structure. Mount the fixed blade 1 on the bracket 2 from top to bottom, so that the skin patch 11 is pressed on the bracket fixing part 21 and fixed on the bracket fixing part 21. The gap m between the supporting bone position 24 and the bottom surface of the fixed blade 1, and the material thickness n of the moving blade 31, satisfy 0≤mn≤0.04mm.

[0064] Furthermore, the bracket 2 is integrally formed with a bracket center hole 22 and a clearance opening 23. A moving blade bracket 33 is installed in the moving blade mounting hole 312, and a center blade 32 is installed on the top of the moving blade bracket 33. The moving blade 31 is connected and fixed to the side of the moving blade bracket 33 through the moving blade connecting part 313. When installing the moving blade 31, the moving blade bracket 33 is aligned with the bracket center hole 22, and the moving blade connecting part 313 is aligned with the clearance opening 23 and installed downwards on the bracket 2. The skin patch 11 is fixed to the bracket fixing part 21 by laser welding from above. A blade mesh 5 is fixed inside the ring of the annular cover 4. The cover 4 is provided with a cover ring 41 and an inner wall 42. The inner wall 42 of the cover 42 passes through the middle hole 13 of the fixed blade from top to bottom and is inserted into the middle hole 22 of the bracket, so that the cover ring 41 covers the weld point between the skin patch 11 and the bracket fixing part 21. At the same time, the blade mesh 5 presses on the middle blade 32 from above. Then the inner wall 42 of the cover 42 is welded and fixed to the bracket 2.

[0065] The manufacturing method of this reciprocating shaver head assembly is characterized by convenient production and high production efficiency. The shaver head assembly manufactured by this method has a simple structure and good shaving performance.

Claims

1. A reciprocating shaver head assembly, characterized in that: The assembly includes a fixed blade (1), a rigid support (2), and a reciprocating blade assembly. The fixed blade (1) is mounted on the support (2). The fixed blade (1) includes a skin-adhesive piece (11) located at the top for shaving. The skin-adhesive piece (11) is an arc-shaped piece or a flat plate structure from left to right. The skin-adhesive piece (11) has several rows of fixed blade teeth (12) arranged in the front-back direction. The reciprocating blade assembly includes a reciprocating blade (31) that can move in the front-back direction. The reciprocating blade (31) has a reciprocating blade tooth (311) located below the fixed blade teeth (12). The support (2) has a rigid support fixing part (21) along the arrangement direction of the fixed blade teeth (12). The support fixing part (21) is located inside the fixed blade teeth (12) and the reciprocating blade teeth (311). The bottom of the skin-adhesive piece (11) is attached to the support fixing part (21) and fixed to the support fixing part (21).

2. The reciprocating shaver head assembly according to claim 1, characterized in that: The bracket (2) and the bracket fixing part (21) are made of metal, and the skin patch (11) is welded and fixed to the bracket fixing part (21).

3. The reciprocating shaver head assembly according to claim 2, characterized in that: The skin patch (11) is welded from top to bottom to the bracket fixing part (21), and the weld point between the two is located on the surface of the skin patch (11). A cover (4) is provided above the skin patch (11) to cover the weld point.

4. The reciprocating shaver head assembly according to claim 3, characterized in that: The bracket (2) has a bracket middle hole (22) along its length in the middle part. The bracket fixing part (21) is located outside the bracket middle hole (22). The skin patch (11) has a fixed knife middle hole (13) in the middle part corresponding to the bracket middle hole (22). The cover (4) is an annular structure, which includes a cover ring (41) and a cover inner wall (42) extending downward from the inside of the cover ring (41) and inserted into the fixed knife middle hole (13) and the bracket middle hole (22). The cover inner wall (42) is close to the hole wall of the bracket middle hole (22) and fixed to the bracket (2). The cover ring (41) covers the skin patch (11) around the outside of the fixed knife middle hole (13). The cover (4) has a knife net (5) on its inner side. The moving knife assembly includes a middle knife (32) located below the knife net (5).

5. A reciprocating shaver head assembly according to claim 4, characterized in that: The cover (4) is a metal part, and the blade mesh (5) is welded and fixed on the inner wall (42) of the cover. The inner wall (42) of the cover is welded and fixed on the wall of the middle hole (22) of the bracket.

6. A reciprocating shaver head assembly according to claim 4, characterized in that: The outer edge of the cover ring (41) extends out of the outside of the bracket fixing part (21) and is located inside the fixed blade tooth (12), and the outer edge of the cover ring (41) presses on the skin patch (11).

7. A reciprocating shaver head assembly according to claim 1, characterized in that: The fixed blade teeth (12) are arranged on the left and right sides of the skin patch (11), and the skin patch (11) is provided with a mesh (16) in the middle. The moving blade assembly includes an intermediate blade (32) located below the middle of the skin patch (11).

8. A reciprocating shaver head assembly according to any one of claims 4-7, characterized in that: Below the intermediate blade (32) is a movable blade support (33), the intermediate blade (32) is mounted on the movable blade support (33), the movable blade support (33) is provided with a drive mounting groove (331), the movable blade support (33) is provided with a spring piece (34) that can be elastically deformed up and down above the drive mounting groove (331), and below the movable blade support (33) is a drive member that drives it to reciprocate back and forth. One end of the drive member is inserted into the drive mounting groove (331) and pushes the spring piece (34) upward to deform it, so as to provide an elastic force that pushes the movable blade support (33) together with the intermediate blade (32) upward.

9. A reciprocating shaver head assembly according to claim 8, characterized in that: The driving component is a swing rod (6) that can swing, and its upper end is provided with a spherical driving head (61).

10. A reciprocating shaver head assembly according to any one of claims 4-6, characterized in that: The intermediate blade (32) is provided with a moving blade support (33), the intermediate blade (32) is mounted on the moving blade support (33), the moving blade support (33) is mounted in the support middle hole (22) of the support (2), the moving blade (31) is provided with a moving blade mounting hole (312) located inside the moving blade tooth (311), the moving blade (31) is sleeved on the outside of the support fixing part (21) through the moving blade mounting hole (312), the moving blade (31) is provided with a moving blade connecting part (313) extending from the left and right sides into the support middle hole (22) and connecting with the moving blade support (33), the support fixing part (21) is provided with a clearance opening (23) to avoid the moving blade connecting part (313).

11. A reciprocating shaver head assembly according to claim 10, characterized in that: The moving blade (31) is made of a thin metal sheet. The bracket (2) has an upwardly protruding support bone (24) on the outside of the bracket fixing part (21). The support bone (24) is located outside the moving blade mounting hole (312) and close to the moving blade tooth (311). The support bone (24) and the fixed blade (1) limit the moving blade tooth (311) vertically. The height difference between the bottom of the blade net (5) and the bottom of the fixed blade tooth (12) is less than the height difference between the top of the intermediate blade (32) and the top of the moving blade tooth (311). The intermediate blade (32) and the moving blade bracket (33) are pressed down by the blade net (5) and the moving blade connecting part (313) is pressed towards the blade. In the following scenario, the moving blade (31) uses the supporting bone position (24) as a fulcrum to raise the moving blade teeth (311) upwards and attach them to the fixed blade teeth (12); or the height difference between the bottom of the skin patch (11) in the area corresponding to the mesh (16) and the bottom of the fixed blade teeth (12) is less than the height difference between the top of the intermediate blade (32) and the top of the moving blade teeth (311). The intermediate blade (32) and the moving blade support (33) are pressed down by the skin patch (11) in the area corresponding to the mesh (16) and the moving blade connection part (313) is pressed down. The moving blade (31) uses the supporting bone position (24) as a fulcrum to raise the moving blade teeth (311) upwards and attach them to the fixed blade teeth (12).

12. A reciprocating shaver head assembly according to claim 1, characterized in that: The skin patch (11) is provided with a cover ring (41) above it to press the skin patch (11) onto the bracket fixing part (21) for fixing. The cover ring (41) is fixedly connected to the bracket (2).

13. A reciprocating shaver head assembly according to claim 1, characterized in that: The skin patch (11) has multiple through holes (17) above the bracket fixing part (21) along the arrangement direction of the fixed blade teeth (12). A fixing element (7) is provided at the position of the through hole (17). The lower end of the fixing element (7) passes through the through hole (17) and is fixed to the bracket (2). Its upper end is provided with an umbrella-shaped head (71) that is larger than the through hole (17) and presses on the skin patch (11) so that the skin patch (11) is pressed on the bracket fixing part (21). The outer surface of the umbrella-shaped head (71) is smooth.

14. A reciprocating shaver head assembly according to claim 13, characterized in that: The fixing element (7) is a plastic part fixed on the bracket (2) or the fixing element (7) is a metal rivet.

15. A reciprocating shaver head assembly according to any one of claims 1-7, 9, 11-14, characterized in that: The bracket (2) is connected to a cutter head holder (8) below. The bottom of the bracket (2) is fixed with front and rear suspension members (2a). The cutter head holder (8) is provided with front and rear support arms (81) connected to the front and rear suspension members (2a). The suspension member (2a) is provided with a downward-facing suspension groove (2a1). The upper end of the support arm (81) is inserted into the suspension groove (2a1). The upper ends of the suspension member (2a) and the support arm (81) are rotatably connected by a pin (2b) so that the bracket (2) can rotate on the cutter head holder (8). A torsion spring (2c) is sleeved on the pin (2b) for directly or indirectly driving the bracket (2) to rotate and reset.

16. A reciprocating shaver head assembly according to claim 15, characterized in that: The cutter head holder (8) includes a cutter head holder body (84) connecting two arms (81). The cutter head holder body (84) has an inner cavity (85) extending through both the upper and lower ends. A swing rod (6) is provided in the inner cavity (85). The middle part of the swing rod (6) is rotatably connected to a swing rod frame (87) via a rotating shaft (86). The swing rod frame (87) is fixed in the inner cavity (85). The moving blade (31) is mounted on a moving blade bracket (33). The moving blade bracket (33) is provided with a drive mounting groove (331) with four side walls. The upper end of the swing rod (6) is provided with a spherical drive head (61) inserted into the drive mounting groove (331). The central axis of the two pins (2b) corresponding to the front and rear arms (81) is concentric or substantially concentric with the center of the spherical drive head (61).

17. A reciprocating shaver head assembly according to claim 16, characterized in that: A magnetic ring (10) is fixed in the inner cavity (85) below the swing rod (6), with the lower end of the swing rod (6) facing the central hole of the magnetic ring (10).

18. A reciprocating shaver head assembly according to claim 15, characterized in that: The suspension member (2a) is provided with hanging holes (2a2) on the front and rear sides of the suspension groove (2a1) for the pin (2b) to pass through. The pin (2b) has a large end with an outer diameter larger than the hanging hole (2a2). The large end of the pin (2b) is located outside the suspension member (2a) and between the front and rear suspension members (2a). The torsion spring (2c) is sleeved on the large end of the pin (2b). A bottom cover (9) is installed between the front and rear suspension members (2a). The end of the bottom cover (9) is attached to or close to the large end of the pin (2b) and restricts the pin (2b) from moving to one side of its large end.

19. A reciprocating shaver head assembly according to claim 15, characterized in that: The suspension member (2a) has hanging holes (2a2) on the front and rear sides of the suspension groove (2a1) for the pin (2b) to pass through. The hanging holes (2a2) on the inner and outer sides of the support arm (81) are smaller on the outer side than on the inner side. The pin (2b) has a small end that mates with the outer hanging hole (2a2). The upper end of the support arm (81) has a shaft hole (82) that mates with the pin (2b). The support arm (81) has a column (83) that protrudes to the side around the outer side of the shaft hole (82). The torsion spring (2c) is sleeved on the column (83) and installed in the suspension groove (2a1). A bottom cover (9) is provided between the front and rear suspension members (2a). The end of the bottom cover (9) is attached to or close to the pin (2b) and restricts the pin (2b) from moving inward toward the support arm (81).

20. A reciprocating shaver head assembly according to claim 15, characterized in that: The bracket (2) and the suspension (2a) are independent metal parts and are fixed by welding.

21. A reciprocating shaver head assembly according to claim 1, characterized in that: The fixed blade (1) is integrally formed from a thin metal plate. The root of the fixed blade tooth (12) is connected to the skin patch (11), and its outer end is a free end and is provided with a thickening head (14).

22. The reciprocating shaver head assembly according to claim 1, characterized in that: The skin patch (11) has edging (15) integrally stretched downwards at both ends. The edging (15) smoothly transitions to the top of the skin patch (11). The bracket (2) has recessed mounting grooves (25) on the outer edges at both ends for the edging (15) to fit into. The outer side of the edging (15) is aligned or substantially aligned with the outer side of the bracket (2).

23. The reciprocating shaver head assembly according to claim 1, characterized in that: The front and rear ends of the skin patch (11) are the outer ends of the fixed blade (1). The front and rear ends of the bracket (2) are integrally formed with support parts (26) that support the front and rear ends of the skin patch (11) from below. The support parts (26) are located on the outer side of the end of the skin patch (11) and have a shielding part (27) that protrudes upward and blocks the end of the skin patch (11) from the side. The outer surface of the shielding part (27) is smoothly connected and transitioned to the outer surface of the front and rear ends of the bracket (2).

24. A reciprocating shaver head assembly according to claim 1, characterized in that: The moving blade (31) is provided with a moving blade mounting hole (312). The width a of the moving blade mounting hole (312) and the distance b between the outer side wall (211) of the left and right side bracket fixing parts (21) satisfy 0≤ab≤0.10mm. The moving blade (31) is fitted onto the outer side of the bracket fixing part (21) through the moving blade mounting hole (312). The left and right side holes of the moving blade mounting hole (312) are respectively matched with the outer side wall (211) of the left and right side bracket fixing parts (21) to guide the moving blade (31) to move back and forth on the bracket (2).

25. A reciprocating shaver head assembly according to claim 1, characterized in that: The moving blade (31) is made of a thin metal sheet. The bracket (2) has an upwardly protruding support bone (24) on the outside of the bracket fixing part (21). The support bone (24) is located inside the moving blade tooth (311) and supports the moving blade (31). The moving blade (31) is limited vertically between the support bone (24) and the fixed blade (1). The gap m between the support bone (24) and the bottom surface of the fixed blade (1) is m. The material thickness n of the moving blade (31) satisfies 0≤mn≤0.04mm.

26. A reciprocating shaver head assembly according to any one of claims 1 to 7, 9, 11-14 or 16-25, characterized in that: The skin patch (11) is provided with fixed blades (12) on both the left and right sides. The fixed blades (12) on both the left and right sides are respectively provided with bracket fixing parts (21). The front and rear ends of the bracket fixing parts (21) on both the left and right sides are connected together. The skin patch (11) is an arc-shaped structure with its bottom surface bent along the arc line K from the left to the right. The top surface formed by the bracket fixing parts (21) from the left to the right is formed by grinding along the arc line K to form an arc-shaped structure corresponding to the bottom surface of the skin patch (11).

Images