Fixed-blade fixing frame and reciprocating shaver head

Abstract

A fixed-blade fixing frame, which is formed by powder metallurgy, and comprises a holder body (11), wherein the left and right ends of the holder body (11) are wide, and the middle portion thereof is narrow. On the front side and / or rear side of the holder body (11), a laterally recessed clearance slot (15) is formed between left and right wide portions (111). Sunken U-shaped steps (12) are integrally formed on the outer edges of the wide portions (111). Left and right rotating connection structures are integrally formed on the holder body (11). The rotating connection structures each comprise a rotating connection portion (13) integrally formed on the holder body. A shaft hole (131) arranged in an X-axis direction is provided on the rotating connection portion (13). The present invention also relates to a reciprocating shaver head, comprising a pivoting head holder (2) and a shaver (10). The shaver (10) comprises the fixed-blade fixing frame (1), a fixed blade (3), a movable blade (4) and a movable-blade transmission device. The fixed blade (3) comprises a skin-contact sheet (31), wherein downward-facing wrapping edges (33) are integrally formed on the left and right ends of the skin-contact sheet (31); the wrapping edges (33) are fitted and fixed with the steps (12); a rotating shaft (5) matching the shaft hole (131) is fixed on the pivoting head holder (2); and a torsion spring (6) is sleeved on the outer side of the rotating shaft (5). The reciprocating shaver head has a simple structure, and is easy to produce and assemble.

Description

A fixed knife fixing frame and a reciprocating shaving head TECHNICAL FIELD

[0001] The present application relates to a fixed knife fixing frame, and also relates to a reciprocating shaving head. BACKGROUND

[0002] In the Chinese patent with the patent number CN208246876U and the name of a reciprocating electric shaving head capable of swinging, the fixed knife is supported by the front and rear edges of the fixed knife support, the side surface of the fixed knife is downwardly bent and welded to the side surface or the bottom surface of the fixed knife support, and in order to avoid the stimulation of the skin by the two ends of the fixed knife, a fixed ring 70 is arranged outside the two ends to shield, but the fixed ring protrudes outside the fixed knife and has a certain influence on the skin feeling.

[0003] In addition, the reciprocating electric shaving head forms two rows of comb tooth structures on the front and rear sides, which can facilitate combing and hooking long hair into the hair inlet for cutting, and therefore the reciprocating electric shaving head is mainly used for shaving long hair and short hair such as long beard and short beard, and for long hair, the side surface of the fixed knife is downwardly bent and fixed to the side surface of the fixed knife support, each comb tooth is composed of two metal pieces, and each row of comb teeth is densely arranged, which blocks the hair from entering the hair groove to a certain extent.

[0004] In order to make the reciprocating shaving head better enter the hair and improve the skin feeling and reduce the size, as shown in FIG. 12, one of the research directions is to arrange downward edge covers 1a at the two ends of the fixed knife to obtain more smooth and comfortable skin feeling, and to arrange the fixed knife teeth 1a1 suspended at the two sides of the fixed knife to facilitate hooking long hair into the hair groove for cutting, in order to reduce the size of the shaving head, the fixed knife is fixed by the metal support 1d in the form of a flat plate, and the plastic support 1f is fixed at the bottom of the metal support, and the rotating connection structure 1f1 is arranged on the plastic support to be rotatably connected with the base or the related swing head support. The metal support is formed by stamping and machining of a metal plate, and the plastic support is formed by injection molding, and in the production and assembly process, the plurality of positioning columns 1f2 on the plastic support are first assembled from bottom to top into the plurality of positioning holes 1d1 in the metal support, then the plastic support is fixed on the metal support by deforming the positioning columns from the top by hot pressing, and then the moving knife and the fixed knife are sequentially assembled from top to bottom on the metal support. In the continuous research and development of the reciprocating shaving head, another new technical solution is proposed to simplify the structure and production and assembly process of the reciprocating shaving head.

[0005] The present application is made based on this situation. SUMMARY

[0006] The technical problem to be solved by the present application is to provide a fixed knife fixing frame, which has a simple structure and is beneficial to simplify the structure and assembly process of the reciprocating shaving head.

[0007] To solve the above technical problems, the present application provides a fixed blade fixing frame for a reciprocating shaving head, which is formed by powder metallurgy and comprises a support body, the support body is wide at both left and right ends and narrow in the middle, wide parts are formed at both left and right ends of the support body, a narrow part is formed between the left and right wide parts, a side inwardly recessed clearance groove is formed between the left and right wide parts on the front side and / or the rear side of the support body, a U-shaped step which is sunken and surrounded by the front side to the rear side is integrally formed on the outer edge of the wide part, two rotating connection structures are integrally formed on the support body, the rotating connection structure comprises a rotating connection part integrally formed on the support body, and an axle hole is arranged on the rotating connection part along the X-axis direction.

[0008] The bottom of the support body is provided with a guide notch outside the port of the axle hole, and the width of the guide notch gradually decreases from bottom to top.

[0009] The guide notch penetrates the support body from bottom to top and forms a through hole, the axle hole is located in the area corresponding to the through hole and is arranged on the rotating connection part.

[0010] The bottom of the rotating connection part is provided with a positioning notch, and the bottom of the positioning notch is provided with an inclined surface outside the entrance of the axle hole.

[0011] The rotating connection part protrudes downward below the bottom of the support body, and a clamping hook is arranged on the other side of the entrance of the axle hole at the lower end of the rotating connection part.

[0012] The support body is provided with a protruding rib arranged along the left-right direction and protruding upward, the protruding rib is arranged close to the outer edge of the narrow part, and the protruding rib is integrally formed with the support body.

[0013] The inner side of the protruding rib of the support body is provided with a ball groove.

[0014] The support body is provided with a movable hole for the reciprocating movement of the movable blade support inside the support body, and the support body is provided with a limiting part protruding laterally in the movable hole.

[0015] Another technical problem to be solved by the present application is to provide a reciprocating shaving head with the characteristics of simple structure and convenient production and assembly.

[0016] To solve the above technical problems, the application discloses a reciprocating shaving head with the fixed blade holder, which comprises a swing head support and a shaving head.

[0017] The reciprocating shaving head as described above, wherein the fixed blade teeth are in a structure with the outer end suspended and correspondingly arranged with the avoidance groove, the outer end of the fixed blade teeth is provided with the thickened ball head, and the moving blade is located at the inner side of the ball head.

[0018] The reciprocating shaving head as described above, wherein the moving blade transmission device comprises a moving blade support fixedly connected with the moving blade, the bottom of the moving blade support is connected with a transmission joint, the support body is provided with a movable hole allowing the moving blade support to reciprocate left and right in the hole, the support body is provided with a limiting part protruding laterally in the movable hole, and the limiting part limits the moving blade support from front to back, so that the moving blade moves in the area at the inner side of the ball head.

[0019] The reciprocating shaving head as described above, wherein the bottom of the fixed blade holder is fixedly connected with a plastic guide part, the plastic guide part is provided with a guide part inserted in the movable hole from bottom to top, the guide part is provided with a guide groove for guiding the moving blade support to slide left and right, the width of the guide groove is smaller than the gap between the two limiting parts from front to back, the fixed blade holder is provided with a hook, the plastic guide part is provided with a hook hole, and the hook is clamped in the hook hole to fix the plastic guide part at the bottom of the fixed blade holder.

[0020] The reciprocating shaving head as described above, wherein the bottom of the support body is provided with a guide notch outside the port of the shaft hole, the width of the guide notch gradually decreases from bottom to top, the plastic guide part is provided with a first notch corresponding to the guide notch, the swing head support comprises two left and right support arms, the rotating shaft is fixed on the support arm, the upper end of the support arm is inserted in the guide notch and the first notch, and the side wall of the guide notch or the first notch limits the rotation range of the support arm relative to the shaving head.

[0021] A reciprocating shaving head as described above, the bottom of the rotating connection part is provided with a positioning notch, the bottom of the positioning notch is provided with a slope outside the entrance of the oblique shaft hole, and the plastic guide part is provided with a second notch corresponding to the positioning notch.

[0022] A reciprocating shaving head as described above, the bracket body is provided with a protruding rib arranged in the left-right direction and protruding upward, the protruding rib is arranged close to the outer edge of the narrow part, the protruding rib supports the movable cutter from below, the movable cutter is made of a metal sheet, and the head of the movable cutter tooth of the movable cutter first contacts the cutter tooth between the movable cutter and the cutter, and the movable cutter is deformed to one side of the cutter with the head of the movable cutter tooth as a fulcrum under the action of the protruding rib, so that the blade body of the movable cutter tooth is close to the blade body of the cutter tooth.

[0023] A reciprocating shaving head as described above, the bracket body is provided with a ball groove on the inner side of the protruding rib, and the ball groove is provided with a ball supporting the movable cutter from below.

[0024] Compared with the prior art, the reciprocating shaving head has the following advantages:

[0025] 1. The cutter fixing bracket of the reciprocating shaving head is formed by powder metallurgy, so that the step, the rotating connection structure and the bracket body can be integrally injection molded, the clearance groove, the step and the rotating connection structure are integrated on the bracket body, the structure is simple, production is convenient, and the structure of the reciprocating shaving head is simplified.

[0026] 2. The bracket body is provided with a guide notch outside the port of the shaft hole at the bottom of the bracket body, so that the guide notch can guide the arm on the swing head bracket when the arm is installed, and the shaft fixed on the arm is aligned with the shaft hole; and the rotating connection part is provided with a positioning notch and a slope, the positioning notch is used for installing the shaft on the swing head bracket from the bottom of the rotating connection part, and the slope is convenient for the shaft to be pressed in.

[0027] 3. The guide notch penetrates the bracket body from bottom to top and forms a through hole, the shaft hole is located in the area corresponding to the through hole, and is arranged on the rotating connection part, so as to reduce the distance between the rotating center and the skin surface of the cutter, and avoid the shaving cutter from turning over on the skin during shaving.

[0028] 4. The movable hole is provided with a limiting part laterally protruding, which is used for limiting the movable cutter bracket from the front and back directions, preventing the movable cutter from moving too much in the front and back directions when the plastic guide part is not assembled, and preventing the movable cutter tooth from being damaged by the ball head.

[0029] 5. The reciprocating shaving head has a simple structure and is convenient for production and assembly.

[0030] 6. The fixed blade of this invention has edging at both ends, which provides a good skin feel. The fixed blade teeth have an outer suspended structure and are set with corresponding clearance grooves, which is conducive to hooking up long hair for cutting. The hair cutting occurs at the clearance groove, which is conducive to the removal of dandruff and cleaning of the shaving blade. The outer end of the fixed blade teeth is provided with a thickened ball head, which can increase the skin feel.

[0031] 7. The moving blade in this invention is made of a thin metal sheet, and between the moving blade and the fixed blade, the head of the moving blade tooth of the moving blade contacts the fixed blade tooth first. Under the action of the rib, the moving blade elastically bends and deforms to one side of the fixed blade, so that the tooth body of the moving blade tooth is close to the tooth body of the fixed blade tooth, thereby improving the sharpness of the cut.

[0032] 8. The fixed blade is made of thin metal sheet. When the fixed blade is installed and fixed on the step with its left and right edges, and the front and rear sides of the fixed blade are suspended fixed blade teeth, the ribs can provide better stability for the fixed blade and the moving blade, preventing the fixed blade from floating in the area between the left and right edges, which would reduce the fit between the moving blade teeth and the fixed blade teeth, thus affecting the sharpness of the cut.

[0033] 8. The present invention has a rolling ball at the bottom of the moving blade for support, which helps to reduce friction and noise generated by movement, and avoids the shaver from overheating due to the movement of the moving blade. [Attached Image Description]

[0034] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, wherein:

[0035] Figure 1 is an exploded view of a reciprocating shaving head according to the present invention;

[0036] Figure 2 is a structural schematic diagram of a fixed blade fixing bracket according to the present invention;

[0037] Figure 3 is a schematic diagram of the bottom structure of a fixed knife fixing bracket according to the present invention;

[0038] Figure 4 is a structural schematic diagram of an embodiment of the razor of the present invention;

[0039] Figure 5 is a structural schematic diagram of an embodiment of the razor of the present invention without the installation of the plastic guide component;

[0040] Figure 6-7 is a schematic diagram of the installation process when assembling the fixed tool and the fixed tool holder, causing the moving tool to deform towards the fixed tool side;

[0041] Figure 8 is a schematic diagram of the structure of a reciprocating shaving head according to the present invention;

[0042] Figures 9a-9b are side views of two different reciprocating shaving heads of the present invention;

[0043] Figure 10 is a cross-sectional view of a reciprocating shaver head of the present invention along the BB direction in Figure 11;

[0044] Fig. 11 is a sectional view of the reciprocating shaving head along the direction of A-A in Fig. 10;

[0045] Fig. 12 is an exploded view of the reciprocating shaving head.

DETAILED DESCRIPTION

[0046] The present application will be further described below in conjunction with the accompanying drawings:

[0047] A fixed blade holder 1 for the reciprocating shaving head is shown in Figs. 1 to 7, which is formed by powder metallurgy and comprises a holder body 11, the left and right ends of which are integrally formed with sunken steps 12 for mounting the fixed blade, and two left and right rotating connection structures integrally formed on the holder body 11 for rotatingly connecting the holder body 11 to the swing head holder 2 so that the fixed blade holder 1 can rotate around the X axis. The X axis corresponds to the left-right direction.

[0048] The fixed blade holder 1 is formed by powder metallurgy, which facilitates the injection molding of the steps 12 and the rotating connection structures with the holder body 11, integrates the steps and the rotating connection structures on the holder body, has a simple structure, is convenient to produce, and is beneficial to simplify the structure of the reciprocating shaving head and the assembly process thereof.

[0049] Preferably, the rotating connection structure comprises a rotating connection part 13 integrally formed on the holder body 11, which is provided with an axial hole 131 arranged along the X axis direction, and is rotatably connected to the rotating shaft 5 fixed on the swing head holder 2 through the axial hole 131, which has a simple structure and is beneficial to the production of the fixed blade holder and the production and assembly of the reciprocating shaving head. Of course, a protruding shaft can also be used instead of the axial hole, which is omitted here.

[0050] Preferably, the bottom of the holder body 11 is provided with a guide notch 14 outside the port of the axial hole 131, which is beneficial to make the position of the axial hole 131 on the fixed blade holder 1 more upward, and the width of the guide notch 14 gradually decreases from bottom to top, which is used to guide the supporting arm on the swing head holder 2 during assembly, so that the rotating shaft fixed on the supporting arm can be better aligned and fitted into the axial hole 131.

[0051] Preferably, the guide notch 14 is formed through the bracket body 11 from bottom to top and forms a through hole 141, the shaft hole 131 is located in the area corresponding to the through hole 141, and is arranged upward on the rotating connecting part 13, that is, deviates upward from the middle position of the rotating connecting part 13 in the up-down direction. After the fixed blade 3 is installed on the fixed blade holder 1, the top surface of the fixed blade is a skin-adhering surface, and the through hole 141 can facilitate the arm of the swing head bracket 2 to be arranged more upward in the guide notch 14, so that the rotating shaft 5 fixed on the arm is more upward, and the distance between the rotating center corresponding to the shaft hole 131 and the skin-adhering surface of the fixed blade is reduced. During shaving, the skin-adhering surface of the fixed blade rubs against the skin, which generates a torsion. The smaller the distance between the rotating center and the skin-adhering surface of the fixed blade is, the smaller the torsion is, which is beneficial to avoid the turning of the shaver 10 on the skin.

[0052] Preferably, the upper end of the rotating connecting part 13 protrudes above the top of the bracket body 11, so as to arrange the shaft hole 131 more upward while ensuring the thickness of the hole wall of the shaft hole 131.

[0053] Preferably, the thickness of the material between the shaft hole 131 and the top of the rotating connecting part 13 is not less than 0.25 mm, so as to have better structural strength.

[0054] Preferably, as shown in the embodiments of FIGS. 2-5, the bottom of the rotating connecting part 13 is provided with a positioning notch 132, and the bottom of the positioning notch 132 is provided with an inclined surface 133 inclined to the outside of the entrance of the shaft hole 131. The positioning notch 132 is used for the rotating shaft on the swing head bracket 2 to be installed upward from the bottom of the rotating connecting part 13, and the inclined surface 133 facilitates the pressing of the rotating shaft.

[0055] Preferably, the rotating connecting part 13 protrudes downward below the bottom of the bracket body 11, and the lower end of the rotating connecting part 13 is provided with a clamping hook 134 on the other side of the entrance of the shaft hole 131, so as to facilitate the installation of other components, such as a plastic guide 9, on the bottom of the bracket body 11.

[0056] Preferably, the bracket body 11 is wide at the left and right ends and narrow in the middle, and forms wide portions 111 at the left and right ends, respectively, and forms a narrow portion 112 between the left and right wide portions 111. The bracket body 11 forms a laterally inwardly recessed clearance groove 15 between the left and right wide portions 111 on the front side and / or the rear side. The step 12 is arranged on the outer edge of the wide portion 111, and the step 12 surrounds from the front side to the rear side of the wide portion 111, forming a U-shaped structure toward the left side or the right side. The step 12 is used in cooperation with the U-shaped edge 33 at the left and right ends of the fixed blade 3, so that the side surface and the top surface of the left and right ends of the shaver are smoothly transitioned, and the skin feel is improved.

[0057] Preferably, the bracket body 11 is upwardly convex with convex ribs 16 arranged in the left-right direction. When the fixed blade is installed, the convex ribs can form a gap to accommodate the moving blade. The convex ribs support the moving blade from below, so that the moving blade can better adhere to the fixed blade. The convex ribs 16 are arranged near the outer edge of the narrow part 112, so that the convex ribs 16 can better adhere to the moving blade teeth. The convex ribs 16 are integrally formed with the bracket body 11, so that the structure is simple and the production is convenient.

[0058] Further, as shown in the embodiments of FIGS. 1-3 and 10, the bracket body 11 is provided with a ball groove 17 on the inner side of the convex ribs 16, for installing a ball to support the moving blade from below and reduce friction.

[0059] As shown in FIGS. 1-3, the bracket body 11 is provided with a movable hole 18 for the reciprocating movement of the moving blade bracket 71 in the left-right direction. The bracket body 11 is provided with a limiting part 19 protruding laterally into the movable hole 18, for limiting the moving blade bracket 71 in the front-rear direction, so as to prevent the moving blade fixed on the moving blade bracket 71 from having an excessively large front-rear movement range.

[0060] Preferably, the bracket body 11 is a flat plate with a length arranged along the X-axis direction, so that the structure is simple and the volume of the shaving razor can be reduced.

[0061] The steps 12, rotating connecting parts 13, shaft holes 131, hooks 134, guiding notches 14, clearance grooves 15, convex ribs 16, movable holes 18, limiting parts 19, ball grooves 17 and positioning notches 132 of the fixed blade holder 1 can be integrally injection molded with the bracket body 11, so that the structure is simple and the production efficiency is high. Powder metallurgy forming is to injection mold a blank by injection molding raw materials containing metal powder, and then to obtain the required metal part by sintering the blank.

[0062] A reciprocating shaving head as shown in FIG. 1-11, comprising a swing head support 2 and a shaving cutter 10, the shaving cutter 10 comprising the above-mentioned cutter fixing frame 1, cutter 3, moving cutter 4 and moving cutter transmission device, the cutter 3 is integrally formed by sheet metal, comprising a top skin piece 31 used as a skin piece when shaving against the skin, the skin piece 31 is provided with a plurality of cutter teeth 32 on the front side and / or rear side, the skin piece 31 is integrally formed with a downward flange 33 on both ends, the flange 33 is smoothly transitioned with the top of the skin piece 31, the flange 33 is matched with the step 12 and fixed by welding or bonding, when shaving, the top surface of the skin piece 31 is moved against the skin, the flange 33 can improve the skin feel, the moving cutter 4 is arranged at the bottom of the cutter 3, the moving cutter transmission device is used to reciprocate the moving cutter 4 relative to the cutter 3, the cutter fixing frame 1 is rotatably connected to the swing head support 2 by a rotating connection structure, so that the shaving cutter 10 can swing on the swing head support 2, and the structure is simple. The swing head support 2 is used to connect with the external machine body, when working, the user holds the external machine body, and the shaving cutter is moved against the skin to shave the hair, the shaving cutter 10 is attached to the skin, and the machine body can swing at a certain angle relative to the shaving cutter 10, so that when the user holds the machine body to shave different parts, the user can adjust and obtain a comfortable posture.

[0063] Preferably, the rotating connection structure comprises a rotating connection part 13 integrally formed on the support body 11, the rotating connection part 13 is provided with an axis hole 131 arranged along the X-axis direction, the swing head support 2 is fixed with a rotating shaft 5 inserted into the axis hole 131, and a torsional spring 6 is sleeved outside the rotating shaft 5, when the shaving cutter 10 rotates relative to the swing head support 2, the torsional spring 6 is used to drive the shaving cutter 10 to rotate back to the original position, the structure is simple and the assembly is convenient.

[0064] Preferably, the support body 11 is wide at both ends and narrow in the middle, and a wide part 111 is formed at both ends, and a narrow part 112 is formed between the two wide parts 111, the front side and / or rear side of the support body 11 is formed with a laterally concave clearance groove 15 between the two wide parts 111, the step 12 is arranged on the outer edge of the wide part 111, the cutter teeth 32 are arranged in a structure with the outer end suspended, and correspond to the clearance groove 15, the outer end of the cutter teeth 32 is provided with a thickened ball head 34, and the moving cutter 4 is located inside the ball head 34, the structure is simple, which is beneficial to hooking long hair for cutting, the hair cutting efficiency is high, the hair cutting occurs at the position of the clearance groove 15, which is beneficial to the chip removal and cleaning of the shaving cutter 10, and the smooth ball head 34 increases the skin feel.

[0065] Preferably, the moving knife transmission device comprises a moving knife support 71 fixedly connected with the moving knife 4, the bottom of the moving knife support 71 is connected with a transmission joint 72, as shown in FIG. 1, the driving mode can be that a swing rod 100 is installed in the swing support 2, one end of the swing rod is connected with the transmission joint 72, the other end is connected with an eccentric wheel on the external machine body, the rotation of the eccentric wheel drives the swing rod to swing, and the swing rod drives the transmission joint 72 to reciprocate left and right; the driving mode can also be that the transmission joint 72 is connected with the eccentric wheel, and the transmission joint 72 is driven to reciprocate left and right by the rotation of the eccentric wheel.

[0066] The moving knife support 71 is metal and is welded and fixed on the bottom of the moving knife.

[0067] The support body 11 is provided with a movable hole 18 through which the moving knife support 71 reciprocates left and right, the support body 11 is provided with a limiting part 19 laterally protruding in the movable hole 18, and the limiting part 19 limits the moving knife support 71 from the front and back directions to make the moving knife 4 move in the area inside the ball head 34. In an embodiment, as shown in FIG. 5, a plurality of limiting parts 19 are provided for the moving knife support 71 to slide and guide left and right.

[0068] In another embodiment, as shown in FIGS. 6 and 7, the limiting part 19 can make the moving knife support 71 move in the front and back directions, and make the moving area of the moving knife 4 in the front and back directions be inside the ball head 34, so as to avoid the moving knife teeth 41 from being damaged by colliding with the ball head 34. In order to make the moving knife support 71 have slide and guide, as shown in the embodiments of FIGS. 4, 8-11, further, the bottom of the fixed cutter support 1 is fixedly connected with a plastic guide piece 9, the plastic guide piece 9 is provided with a guide part 91 inserted in the movable hole 18 from bottom to top, the guide part 91 is provided with a guide groove 92 for the moving knife support 71 to slide and guide left and right, the width of the guide groove 92 is smaller than the gap between the two limiting parts 19 in front and back, the fixed cutter support 1 is provided with a clamping hook 134, the plastic guide piece 9 is provided with a clamping hole 93, the clamping hook 134 is clamped in the clamping hole 93 to fix the plastic guide piece 9 on the bottom of the fixed cutter support 1, which has a simple structure and is convenient to assemble. The guide groove 92 formed by the plastic guide piece 9 is used for the moving knife support 71 to slide and guide left and right, which is beneficial to reduce the noise generated by friction and the temperature rise caused by friction when the moving knife support 71 moves at high speed.

[0069] The limiting part 19 also makes it possible to avoid the moving knife teeth 41 from being damaged by colliding with the ball head 34 when the plastic guide piece 9 is not installed.

[0070] Preferably, as shown in Figs. 4 and 8, the bottom of the support body 11 is provided with a guide notch 14 outside the port of the shaft hole 131, the shaft hole 131 is located in the guide notch 14, the width of the guide notch 14 gradually decreases from bottom to top, the plastic guide 9 is provided with a first notch 95 corresponding to the guide notch 14, the swing head support 2 includes left and right two arms 21, the rotating shaft 5 is fixed on the arm 21, the upper end of the arm 21 is inserted into the guide notch 14 and the first notch 95, and the rotation range of the arm 21 relative to the shaving razor 10 is limited by the side wall of the guide notch 14 or the first notch 95, which is simple and convenient for assembling the shaving razor 10 and the swing head support 2. As shown in Figs. 9a-9b, under the condition of no external force, the torsional spring 6 deviates the shaving razor 10 to one side, under the action of external force, the shaving razor 10 can be rotated from one position to a second position, and when the external force is removed, it rebounds to the initial position.

[0071] Preferably, the guide notch 14 penetrates the support body 11 from bottom to top and forms a through hole 141, the shaft hole 131 is located in the area corresponding to the through hole 141, and is arranged on the upper rotating connection part 13, the top of the arm 21 is close to or penetrates the through hole 141, and the rotating shaft 5 is fixed on the upper end of the arm 21, which is beneficial to reduce the distance between the rotating center corresponding to the shaft hole 131 and the skin contact surface of the fixed blade. When shaving, because the shaving razor 10 moves along the skin, there is friction between the skin contact surface of the fixed blade and the skin, which generates a torsion, the smaller the distance between the rotating center and the skin contact surface of the fixed blade, the smaller the torsion, which is beneficial to avoid the turning of the shaving razor 10 on the skin.

[0072] Preferably, the left and right two arms 21 are provided by a U-shaped metal frame which is formed by bending a rigid metal plate, which reduces the volume of the reciprocating shaving razor head, so that the outer side of the arm 21 is flush with or substantially flush with the outer side of the shaving razor 10, as shown in Figs. 8, 9a and 11; or as shown in Fig. 9b, the arm 21 is located on the inner side of the edge 33.

[0073] Preferably, the bottom of the rotating connection part 13 is provided with a positioning notch 132, the bottom of the positioning notch 132 is provided with an inclined surface 133 inclined to the outside of the entrance of the shaft hole 131, and the plastic guide 9 is provided with a second notch 94 corresponding to the positioning notch 132, so that the rotating shaft 5 is positioned and assembled into the shaft hole 131.

[0074] Preferably, the bracket body 11 is upwardly convex with convex ribs 16 arranged in the left-right direction, the convex ribs 16 are arranged near the outer edge of the narrow part 112, the convex ribs 16 support the moving knife 4 from below and support the moving knife teeth 41 near the root, as shown in FIG. 10, so that the moving knife teeth 41 better adhere to the fixed knife, improving the sharpness of cutting, the moving knife 4 is made of a metal sheet, and the head of the moving knife tooth 41 of the moving knife 4 first contacts the fixed knife tooth 32 between the moving knife 4 and the fixed knife 3, the moving knife 4 is deformed to one side of the fixed knife 3 with the head of the moving knife tooth 41 as the fulcrum under the action of the convex rib 16, so that the tooth body of the moving knife tooth 41 is close to the tooth body of the fixed knife tooth 32. As shown in FIG. 6, during assembly, the moving knife 4 is first placed between the fixed knife holder 1 and the fixed knife 3, the moving knife is supported from the bottom by the convex rib 16, and during the process of the fixed knife 3 being assembled into the fixed knife holder 1, the head of the moving knife tooth 41 first contacts the fixed knife tooth 32, as shown in FIG. 7, when the fixed knife 3 and the fixed knife holder 1 continue to be assembled into place, the heads of the moving knife teeth 41 on the front and back sides are supported on the bottom of the fixed knife, and the moving knife 4 is elastically bent and deformed to one side of the fixed knife 3 under the action of the convex rib 16, so that the tooth body of the moving knife tooth 41 is close to the tooth body of the fixed knife tooth 32. For the entire moving knife tooth, the head of the moving knife tooth and the tooth body of the fixed knife tooth are best fitted, so that the head of the moving knife tooth and the position near the head can be effectively guaranteed to be fitted with the fixed knife tooth, and since the head of the moving knife tooth is directed outward, it is preferentially cut to the hair, thereby improving the sharpness of cutting the hair.

[0075] In addition, the fixed knife 3 is made of a metal sheet to better shave, when the fixed knife 3 is installed and fixed on the step 12 with the edges 33 at both ends, the front and back sides of the fixed knife are suspended fixed knife teeth 32, the convex rib 16 can provide better stability for the fixed knife 3 and the moving knife, preventing the fixed knife from floating in the area between the left and right edges and reducing the fit of the moving knife tooth and the fixed knife tooth, thereby affecting the sharpness of cutting.

[0076] Further, as shown in FIG. 10, the inner side of the bracket body 11 is provided with a ball groove 17, the ball groove 17 is provided with a ball 8 supporting the moving knife 4 from below, and the moving knife 4 drives the ball 8 to roll in the ball groove 17 during left-right reciprocating movement, which is beneficial to reduce friction and noise generated by movement, and avoid high temperature rise of the shaver caused by movement of the moving knife.

[0077] The reciprocating shaver head has simple structure, is beneficial to production and assembly, has good skin feel, and has high hair entry efficiency.

Claims

1. A fixed blade holder (1) for a reciprocating shaving razor head, characterized in that: The bracket body (11) is formed by powder metallurgy, which is wide at both left and right ends and narrow in the middle, and forms wide parts (111) at both left and right ends, and forms a narrow part (112) between the left and right wide parts (111). The front side and / or the rear side of the bracket body (11) forms a laterally concave clearance groove (15) between the left and right wide parts (111). The outer edge of the wide part (111) is integrally formed with a sunken U-shaped step (12) which is surrounded from the front side to the rear side. The bracket body (11) is integrally formed with two rotating connection structures on the left and right sides. The rotating connection structure comprises a rotating connection part (13) integrally formed on the bracket body (11), and the rotating connection part (13) is provided with an axial hole (131) arranged along the X-axis direction.

2. A fixed knife holder (1) according to claim 1, characterized in that: The bottom of the bracket body (11) is provided with a guide notch (14) outside the port of the axial hole (131). The width of the guide notch (14) gradually decreases from bottom to top.

3. A fixed knife holder (1) according to claim 2, characterized in that: The guide notch (14) penetrates the bracket body (11) from bottom to top and forms a through hole (141). The axial hole (131) is located in the area corresponding to the through hole (141) and is arranged on the rotating connection part (13).

4. A fixed knife holder (1) according to claim 2, characterized in that: The bottom of the rotating connection part (13) is provided with a positioning notch (132). The bottom of the positioning notch (132) is provided with an inclined surface (133) inclined to the outside of the entrance of the axial hole (131).

5. A fixed knife holder (1) according to claim 2, characterized in that: The rotating connection part (13) protrudes downward below the bottom of the bracket body (11). The lower end of the rotating connection part (13) is provided with a clamping hook (134) on the other side of the entrance of the axial hole (131).

6. A fixed knife holder (1) according to claim 5, characterized in that: The guide notch (14) penetrates the bracket body (11) from bottom to top and forms a through hole (141). The axial hole (131) is located in the area corresponding to the through hole (141) and is arranged on the rotating connection part (13). The bottom of the rotating connection part (13) is provided with a positioning notch (132). The bottom of the positioning notch (132) is provided with an inclined surface (133) inclined to the outside of the entrance of the axial hole (131).

7. A fixed knife holder (1) according to claim 6, characterized in that: The bracket body (11) is provided with a protruding rib (16) arranged in the left and right directions. The protruding rib (16) is arranged close to the outer edge of the narrow part (112). The protruding rib (16) is integrally formed with the bracket body (11).

8. A fixed knife holder (1) according to claim 7, characterized in that: The bracket body (11) is provided with a ball groove (17) inside the protruding rib (16). The bracket body (11) is provided with a movable hole (18) for the reciprocating movement of the movable knife bracket (71) inside the bracket body (11). The bracket body (11) is provided with a limiting part (19) protruding laterally in the movable hole (18).

9. A fixed knife holder (1) according to claim 1, characterized in that: The bracket body (11) is provided with a protruding rib (16) arranged in the left and right directions. The protruding rib (16) is arranged close to the outer edge of the narrow part (112). The protruding rib (16) is integrally formed with the bracket body (11).

10. A fixed knife holder (1) according to claim 9, characterized in that: The bracket body (11) is provided with a ball groove (17) inside the protruding rib (16).

11. A fixed knife holder (1) according to claim 10, characterized in that: The bracket body (11) is provided with a movable hole (18) for reciprocating movement of the moving knife bracket (71) in and out of the left and right, and the bracket body (11) is provided with a limiting portion (19) protruding laterally in the movable hole (18).

12. A fixed knife holder (1) according to claim 1, characterized in that: The bracket body (11) is provided with a movable hole (18) for reciprocating movement of the moving knife bracket (71) in and out of the left and right, and the bracket body (11) is provided with a limiting portion (19) protruding laterally in the movable hole (18).

13. A reciprocating shaving head with a stationary blade holder (1) according to claim 1, comprising a rocker (2) and a shaving blade (10), characterized in that: The shaving knife (10) comprises a fixed knife holder (1), a fixed knife (3), a moving knife (4) and a moving knife transmission device, the fixed knife (3) is integrally formed by a metal plate, which comprises a skin contact piece (31) at the top for use as a skin contact piece when shaving, the skin contact piece (31) is provided with a plurality of fixed knife teeth (32) on the front side and / or the rear side, the skin contact piece (31) is integrally formed with a downward edge (33) at both ends, the edge (33) is smoothly connected with the top of the skin contact piece (31), the edge (33) is matched with the step (12) and fixed by welding or bonding, the moving knife (4) is arranged at the bottom of the fixed knife (3), the moving knife transmission device is used for reciprocating movement of the moving knife (4) relative to the fixed knife (3), the swing head bracket (2) is fixed with a rotating shaft (5), the rotating shaft (5) is inserted into the shaft hole (131) to make the shaving knife (10) rotate and connect with the swing head bracket (2), the rotating shaft (5) is sleeved with a torsional spring (6) on the outside, when the fixed knife holder (1) rotates relative to the swing head bracket (2), the torsional spring (6) is used to drive the fixed knife holder (1) to rotate and reset.

14. A reciprocating shaving head according to claim 13 wherein: The fixed knife tooth (32) is a structure with the outer end suspended, and is arranged corresponding to the avoidance slot (15), the outer end of the fixed knife tooth (32) is provided with a thickened ball head (34), and the moving knife (4) is located on the inner side of the ball head (34).

15. A reciprocating shaving head according to claim 14 wherein: The moving knife transmission device comprises a moving knife bracket (71) fixedly connected with the moving knife (4), the bottom of the moving knife bracket (71) is connected with a transmission joint (72), the bracket body (11) is provided with a movable hole (18) for reciprocating movement of the moving knife bracket (71) in and out of the left and right, the bracket body (11) is provided with a limiting portion (19) protruding laterally in the movable hole (18), and the limiting portion (19) limits the moving knife bracket (71) to move the moving knife (4) in the area on the inner side of the ball head (34) from the front and rear directions.

16. A reciprocating shaving head according to claim 15 wherein: The bottom of the fixed knife holder (1) is fixedly connected with a plastic guide (9), the plastic guide (9) is provided with a guide portion (91) inserted into the movable hole (18) from bottom to top, the guide portion (91) is provided with a guide groove (92) for sliding guidance of the moving knife bracket (71) left and right, the width of the guide groove (92) is smaller than the gap between the two limiting portions (19) from front to back, the fixed knife holder (1) is provided with a hook (134), the plastic guide (9) is provided with a hook hole (93), and the hook (134) is clamped in the hook hole (93) to fix the plastic guide (9) on the bottom of the fixed knife holder (1).

17. A reciprocating shaving head according to claim 16 wherein: The bottom of the support body (11) is provided with a guide notch (14) outside the port of the shaft hole (131), the width of the guide notch (14) gradually decreases from bottom to top, the plastic guide piece (9) is provided with a first notch (95) corresponding to the guide notch (14), the swing head support (2) includes left and right two arms (21), the rotating shaft (5) is fixed on the arm (21), the upper end of the arm (21) is inserted into the guide notch (14) and the first notch (95), and the rotation range of the arm (21) relative to the shaver (10) is limited by the side wall of the guide notch (14) or the first notch (95).

18. A reciprocating shaving head according to claim 17 wherein: The bottom of the rotating connection part (13) is provided with a positioning notch (132), the bottom of the positioning notch (132) is provided with a slope (133) outside the entrance of the inclined shaft hole (131), and the plastic guide piece (9) is provided with a second notch (94) corresponding to the positioning notch (132).

19. A reciprocating shaving razor cartridge according to claim 13 characterized in that: The support body (11) is provided with a protruding rib (16) arranged in the left-right direction and protruding upward, the protruding rib (16) is arranged close to the outer edge of the narrow part (112), the protruding rib (16) supports the movable cutter (4) from below, the movable cutter (4) is made of a metal sheet, the head of the movable cutter tooth (41) of the movable cutter (4) is first in contact with the fixed cutter tooth (32) between the movable cutter (4) and the fixed cutter (3), and the movable cutter (4) is deformed to one side of the fixed cutter (3) under the action of the protruding rib (16), so that the blade body of the movable cutter tooth (41) is close to the blade body of the fixed cutter tooth (32).

20. A reciprocating shaving head according to claim 19 wherein: The support body (11) is provided with a ball groove (17) inside the protruding rib (16), and the ball groove (17) is provided with a ball (8) supporting the movable cutter (4) from below.

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