Fixed cutter fixing frame and reciprocating type shaving cutter head

Abstract

The fixed cutter fixing frame is formed through powder metallurgy and comprises a support body, the left end and the right end of the support body are wide, the middle of the support body is narrow, a laterally-concave receding groove is formed between the left wide portion and the right wide portion of the front side and / or the rear side of the support body, and sinking U-shaped steps are integrally formed on the outer edges of the wide portions. A left rotary connecting structure and a right rotary connecting structure are integrally formed on the support body, each rotary connecting structure comprises a rotary connecting part integrally formed on the support body, and a shaft hole formed in the X-axis direction is formed in each rotary connecting part; the invention further discloses a reciprocating type shaving tool bit, the reciprocating type shaving tool bit comprises a head swinging support and a shaving cutter, the shaving cutter comprises the fixed cutter fixing frame, a fixed cutter, a movable cutter and a movable cutter transmission device, the fixed cutter comprises a skin attaching piece, downward covered edges are integrally formed at the left end and the right end of the skin attaching piece, and the covered edges are fixed to the steps in a matched mode. According to the swing head mechanism of the automobile engine, the structure is simple, and production and assembly are easy.

Description

[Technical field]

[0001] The invention relates to a fixed blade fixing frame and also to a reciprocating shaving blade head. [Background technology]

[0002] In the Chinese patent with announcement number CN208246876U, entitled A Swingable Reciprocating Electric Shaver Head, the fixed knife is supported by the front and rear edges of the fixed knife bracket, and the side of the fixed knife is bent downward and welded to the side or bottom of the fixed knife bracket. In order to prevent the two ports of the fixed knife from irritating the skin, a fixing ring 70 is provided on the outside of the port to block it. However, the fixing ring protrudes on the outside of the fixed knife, which has a certain influence on the skin feel.

[0003] In addition, this reciprocating electric shaver head forms two rows of comb teeth structures on the front and back sides, which can be helpful for combing and hooking up long hair to enter the hair inlet pores for cutting. Therefore, this reciprocating electric shaver head is mainly used to shave long hair and short hair, such as long beards and short beards. For long hair, since the side of the fixed knife is bent downward and fixed to the side of the fixed knife bracket, each comb tooth is composed of two pieces of metal, and each row of comb teeth is densely arranged, which to a certain extent blocks the hair from entering the hair inlet groove better.

[0004] In order to make the reciprocating shaver better enter the hair and improve the skin feel, reduce the volume. Fig.12 As shown, one direction of our research is to set a downward edging 1a at both ends of the fixed knife to obtain a smoother and more comfortable skin feel, and to set suspended fixed knife teeth 1a1 on both sides of the fixed knife to facilitate hooking long hair into the hair feeding groove for cutting. In order to reduce the volume of the razor, the fixed knife is fixed by a metal bracket 1d with a flat structure, and a plastic bracket 1f is fixed at the bottom of the metal bracket, and a rotating connection structure 1f1 is set on the plastic bracket to be rotatably connected with the base or the related swing head bracket. Among them, the metal bracket is made of metal sheet stamping and lathing, and the plastic bracket is injection molded. During production and assembly, it is necessary to first install multiple positioning columns 1f2 on the plastic bracket from bottom to top into multiple positioning holes 1d1 of the metal bracket, and then fix the plastic bracket on the metal bracket by deforming the upper hot pressing positioning column, so that the moving knife and the fixed knife can be installed downward in sequence above the metal bracket. In the continuous research and development of the reciprocating shaving head, our company has proposed another new technical solution to simplify the structure and production and assembly process of the reciprocating shaving head.

[0005] The present invention is made based on this situation. [Summary of the invention]

[0006] The technical problem to be solved by the present invention is to provide a fixed blade fixing frame, which has a simple structure and is conducive to simplifying the structure of a reciprocating shaving blade head and its assembly process.

[0007] In order to solve the above technical problems, the present invention discloses a fixed knife fixing frame for a reciprocating razor head, which is formed by powder metallurgy and includes a bracket body. The bracket body is wide at the left and right ends and narrow in the middle, and a wide portion is formed at the left and right ends respectively, and a narrow portion is formed between the left and right wide portions. The front and / or rear sides of the bracket body form a laterally concave air avoidance groove between the left and right wide portions, and a sunken U-shaped step that surrounds from the front side to the rear side is integrally formed on the outer edge of the wide portion. Two left and right rotating connection structures are integrally formed on the bracket body, and the rotating connection structure includes a rotating connection portion integrally formed on the bracket body, and the rotating connection portion is provided with an axial hole arranged along the X-axis direction.

[0008] In the fixed knife fixing bracket as described above, a guide notch is provided at the bottom of the bracket body, which is located outside the port of the shaft hole, and the width of the guide notch gradually decreases from bottom to top.

[0009] In the fixed knife fixing bracket as described above, the guide notch penetrates the bracket body from bottom to top to form a through opening, and the shaft hole is located in the area corresponding to the through opening and is arranged on the upper side of the rotating connection part.

[0010] In the fixed knife fixing bracket as described above, a positioning notch is provided at the bottom of the rotating connection portion, and an inclined surface inclined toward the outside of the entrance of the shaft hole is provided at the bottom of the positioning notch.

[0011] In the fixed knife fixing bracket as described above, the rotating connecting part protrudes downward below the bottom of the bracket body, and a hook is provided at the other side of the entrance of the shaft hole at the lower end of the rotating connecting part.

[0012] In the above-mentioned fixed knife fixing bracket, the bracket body has convex ribs protruding upwards and arranged in the left-right direction, the convex ribs are arranged close to the outer edge of the narrow part, and the convex ribs are integrally formed with the bracket body.

[0013] In the fixed knife fixing bracket as described above, a ball groove is provided on the bracket body on the inner side of the convex rib.

[0014] In the above-mentioned fixed knife fixing bracket, the bracket body is provided with a movable hole for allowing the movable knife bracket to reciprocate left and right, and the bracket body is provided with a limiting portion protruding laterally in the movable hole.

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

[0016] To solve the above technical problems, the present invention provides a reciprocating razor head with the above-mentioned fixed knife fixing frame, comprising a swing head bracket and a razor, the razor comprising a fixed knife fixing frame, a fixed knife, a movable knife and a movable knife transmission device, the fixed knife is integrally formed of a metal plate, and comprises a skin-contacting piece located at the top for contacting with the skin during shaving, the skin-contacting piece is provided with a plurality of fixed knife teeth on the front side and / or the rear side, the skin-contacting piece is integrally formed with a downwardly facing edge on the left and right ends, the edge is smoothly transitioned with the top of the skin-contacting piece, the edge is matched with the step and fixed by welding or bonding, the movable knife is arranged at the bottom of the fixed knife, the movable knife transmission device is used for driving the movable knife to reciprocate left and right relative to the fixed knife, a rotating shaft is fixed on the swing head bracket, the rotating shaft is inserted into the shaft hole to make the razor rotate and be connected to the swing head bracket, a torsion spring is sleeved on the outer side of the rotating shaft, and when the fixed knife fixing frame rotates relative to the swing head bracket, the torsion spring is used for driving the fixed knife fixing frame to rotate and reset.

[0017] In the reciprocating razor head as described above, the fixed blade teeth are of a structure with the outer ends suspended in the air and are arranged corresponding to the air avoidance grooves. A thickened ball head is arranged on the outer ends of the fixed blade teeth, and the movable blade is located on the inner side of the ball head.

[0018] A reciprocating razor head as described above, the movable knife transmission device includes a movable knife bracket fixedly connected to the movable knife, the bottom of the movable knife bracket is connected to a transmission joint, the bracket body is provided with a movable hole for the movable knife bracket to reciprocate left and right inside, the bracket body is provided with a limiting portion protruding laterally in the movable hole, the limiting portion limits the movable knife bracket from the front-to-back direction so that the movable knife moves in the area inside the ball head.

[0019] A reciprocating razor head as described above, wherein a plastic guide is connected and fixed to the bottom of the fixed knife fixing frame, the plastic guide is provided with a guide portion inserted into the movable hole from bottom to top, the guide portion is provided with a guide groove for guiding the movable knife bracket to slide left and right, the width of the guide groove is smaller than the gap between the front and rear limiting portions, the fixed knife fixing frame is provided with a hook, the plastic guide is provided with a hook hole, the hook is hooked in the hook hole to fix the plastic guide to the bottom of the fixed knife fixing frame.

[0020] A reciprocating razor head as described above, wherein a guide notch is provided at the bottom of the bracket body, located outside the port of the shaft hole, and the width of the guide notch gradually decreases from bottom to top; a first notch corresponding to the guide notch is provided on the plastic guide member; the swing head bracket comprises left and right arms, the rotating shaft is fixed on the arms, the upper end of the arms is inserted into the guide notch and the first notch, and the rotation range of the arms relative to the razor is limited by the side wall of the guide notch or the first notch.

[0021] In the reciprocating shaver head as described above, a positioning notch is provided at the bottom of the rotating connection part, a slope is provided at the bottom of the positioning notch which is inclined toward the outside of the entrance of the shaft hole, and a second notch corresponding to the positioning notch is provided on the plastic guide.

[0022] In the reciprocating razor head as described above, a convex rib is protruded upward on the support body and is arranged in the left and right directions. The convex rib is arranged near the outer edge of the narrow portion, and the convex rib supports the movable knife from below. The movable knife is made of a metal sheet, and between the movable knife and the fixed knife, the head of the movable knife teeth of the movable knife first contacts the fixed knife teeth. Under the action of the convex rib, the movable knife is deformed to one side of the fixed knife with the head of the movable knife teeth as a fulcrum so that the tooth body of the movable knife teeth is close to the tooth body of the fixed knife teeth.

[0023] In the reciprocating shaver head as described above, a ball groove is provided on the support body at the inner side of the convex rib, and a ball is provided in the ball groove for supporting the movable razor from below.

[0024] Compared with the prior art, the present invention has the following advantages:

[0025] 1. The fixed blade fixing frame of the present invention is formed by powder metallurgy, which is convenient for injection molding the step, the rotating connection structure and the bracket body, and the air avoidance groove, the step and the rotating connection structure are integrated on the bracket body, which has a simple structure and is easy to produce, and is conducive to simplifying the structure of the reciprocating razor head.

[0026] 2. The fixed knife fixing bracket of the present invention is provided with a guide notch at the outside of the port of the shaft hole at the bottom of the bracket body, so as to facilitate the guidance when the support arm on the swing head bracket is installed, so that the rotating shaft fixed on the support arm is aligned with the shaft hole; and a positioning notch and an inclined surface are provided on the rotating connection part, the positioning notch is used for the rotating shaft on the swing head bracket to be installed upward from the bottom of the rotating connection part facing the position, and the inclined surface facilitates the pressing in of the rotating shaft.

[0027] 3. The guide notch of the present invention penetrates the bracket body from bottom to top and forms a through opening. The axial hole is located in the area corresponding to the through opening and is arranged on the upper side of the rotating connection part, which is beneficial to shortening the distance between the rotation center and the skin-contacting surface of the fixed blade, and is beneficial to preventing the razor from flipping over on the skin during shaving.

[0028] 4. The present invention has a limiting portion protruding laterally in the movable hole, which is used to limit the movable knife bracket from the front and rear directions to prevent the movable knife fixed on the movable knife bracket from having an excessive front and rear movable range when the plastic guide is not assembled, so that the movable knife teeth hit the ball head and damage the movable knife teeth.

[0029] 5. The reciprocating razor head of the present invention has a simple structure and is easy to produce and assemble.

[0030] 6. The fixed blade of the present invention has edging at both ends, which has a good skin feel. The fixed blade teeth are of a structure with the outer ends suspended and arranged corresponding to the air avoidance grooves, which is conducive to hooking up long hair for cutting. The hair feeding efficiency is high, and the hair cutting occurs at the position of the air avoidance groove, which is conducive to chip removal and cleaning of the razor. The outer ends of the fixed blade teeth are provided with thickened ball heads, which can increase the skin feel.

[0031] 7. The movable knife in the present invention is made of metal sheet, and between the movable knife and the fixed knife, the head of the movable knife teeth of the movable knife first contacts the fixed knife teeth. Under the action of the convex ribs, the movable knife elastically bends and deforms toward one side of the fixed knife, so that the tooth body of the movable knife teeth is close to the tooth body of the fixed knife teeth, thereby improving the cutting sharpness.

[0032] 8. The fixed knife is made of metal sheet. When the fixed knife is fixed on the step with its left and right ends, and the front and back sides of the fixed knife are suspended fixed knife teeth, the convex ribs can provide better stability for the fixed knife and the movable knife, preventing the fixed knife from floating in the area between the left and right edges and reducing the fit between the movable knife teeth and the fixed knife teeth, thereby affecting the sharpness of the cutting.

[0033] 8. The present invention provides a rolling ball at the bottom of the movable blade for support, which is beneficial to reduce the noise generated by friction and movement and avoid excessive temperature rise of the razor caused by the movement of the movable blade.

Brief Description of the Drawings

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

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

[0036] Figure 2 It is a structural schematic diagram of a fixed knife fixing frame of the present invention;

[0037] Figure 3 It is a schematic diagram of the bottom structure of a fixed knife fixing frame of the present invention;

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

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

[0040] Figure 6-7 This is an installation diagram of deforming the movable knife toward the fixed knife side when the fixed knife and the fixed knife fixing frame are assembled;

[0041] Figure 8 It is a structural schematic diagram of a reciprocating shaving head of the present invention;

[0042] Figure 9a-9b is a side view of two different reciprocating shaving heads of the present invention;

[0043] Fig.10 The invention discloses a reciprocating razor head. Fig.11 Cross-sectional view in the BB direction;

[0044] Fig.11 The invention discloses a reciprocating razor head. Fig.10 Sectional view in the AA direction;

[0045] Fig.12 It is an exploded reference image of a reciprocating razor. [Specific implementation method]

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

[0047] like Figures 1 to 7 A fixed blade fixing frame 1 is shown in the figure, which is used for a reciprocating razor head and is formed by powder metallurgy. It includes a bracket body 11, and the left and right ends of the bracket body 11 are integrally formed with sunken steps 12 for mounting the fixed blade. The bracket body 11 is integrally formed with two left and right rotating connection structures, and the rotating connection structures are used to rotatably connect the bracket body 11 to the swing head bracket 2 so that the fixed blade fixing frame 1 can rotate around the X axis. The direction corresponding to the X axis is the left and right direction.

[0048] The fixed blade fixing frame 1 is formed by powder metallurgy, which facilitates the integral injection molding of the step 12, the rotating connection structure and the bracket body 11. The step and the rotating connection structure are integrated on the bracket body, which has a simple structure and is easy to produce, and is conducive to simplifying the structure of the reciprocating shaver head and its assembly process.

[0049] Preferably, the rotating connection structure includes 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, and the axial hole 131 is used to cooperate with the rotating shaft 5 fixed on the swing head bracket 2 for rotational connection, which has a simple structure and is conducive to the production of the fixed blade fixing frame and the production and assembly of the reciprocating shaving head. Of course, a protruding shaft can also be used to replace the shaft hole, which is omitted in the figure.

[0050] Preferably, a guide notch 14 is provided at the outside of the port of the shaft hole 131 at the bottom of the bracket body 11, and the guide notch 14 is conducive to making the position of the shaft hole 131 on the fixed knife fixing frame 1 further upward, and the width of the guide notch 14 gradually decreases from bottom to top. During assembly, the guide notch 14 is used to guide the support arm on the swing head bracket 2 so that the rotating shaft fixed on the support arm can be better aligned with the shaft hole 131.

[0051] 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 side of the rotating connection part 13, that is, it deviates upward from the middle position of the rotating connection part 13 in the up-down direction. After the fixed knife 3 is installed on the fixed knife fixing frame 1, the top surface of the fixed knife is a skin-contacting surface close to the skin. The through hole 141 can facilitate the support arm of the swing head support 2 to be arranged more upward in the guide notch 14, so that the rotating shaft 5 fixed on the support arm is closer to the upper side, which is conducive to reducing the distance between the rotation center corresponding to the shaft hole 131 and the skin-contacting surface of the fixed knife. When shaving, since the razor 10 moves close to the skin, there is friction between the skin-contacting surface of the fixed knife and the skin, which will generate torque. The smaller the distance between the rotation center and the skin-contacting surface of the fixed knife, the smaller the torque, which is conducive to preventing the razor 10 from flipping over on the skin.

[0052] Preferably, the upper end of the rotating connection portion 13 protrudes above the top of the bracket body 11, so as to ensure the material thickness of the hole wall of the shaft hole 131 and set the shaft hole 131 higher.

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

[0054] Preferably, if Figure 2-5 In the illustrated embodiment, a positioning notch 132 is provided at the bottom of the rotating connection part 13, and a slope 133 is provided at the bottom of the positioning notch 132, which is 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 connection part 13 facing this position, and the slope 133 facilitates the pressing in of the rotating shaft.

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

[0056] Preferably, the left and right ends of the bracket body 11 are wide and the middle is narrow, and wide portions 111 are formed at the left and right ends respectively, and a narrow portion 112 is formed between the left and right wide portions 111. The front and / or rear side of the bracket body 11 forms a laterally concave air avoidance groove 15 between the left and right wide portions 111. The step 12 is arranged on the outer edge of the wide portion 111, and the step 12 surrounds from the front side of the wide portion 111 to the rear side to form a U-shaped structure facing the left or right side. The step 12 is used to cooperate with the U-shaped edging 33 at the left and right ends of the fixed knife 3, so that the side surfaces and the top surface of the left and right ends of the razor are smoothly transitioned to improve the skin feel.

[0057] Preferably, the bracket body 11 has an upward protrusion with a convex rib 16 arranged in the left and right direction. When the fixed knife is installed, the convex rib can form a gap with the fixed knife to accommodate the movable knife. The convex rib supports the movable knife from below so that the movable knife can be better close to the fixed knife. The convex rib 16 is arranged close to the outer edge of the narrow portion 112 so that the convex rib 16 can be better close to the movable knife teeth. The convex rib 16 and the bracket body 11 are integrally formed, with a simple structure and convenient production.

[0058] Furthermore, if Figure 1-3 In the embodiment shown in FIG. 10 , a ball groove 17 is provided on the bracket body 11 on the inner side of the convex rib 16 for mounting a ball to support the moving knife from below to reduce friction.

[0059] like Figure 1-3 As shown, the bracket body 11 is provided with a movable hole 18 for the movable knife bracket 71 to reciprocate left and right, and the bracket body 11 is provided with a limiting portion 19 protruding laterally from the movable hole 18, which is used to limit the movable knife bracket 71 from the front and rear directions to prevent the movable knife fixed on the movable knife bracket 71 from having an excessively large front and rear movement range.

[0060] Preferably, the support body 11 is a flat plate with a length arranged along the X-axis direction, which has a simple structure and is conducive to reducing the volume of the shaver.

[0061] The fixed blade fixing frame 1, the step 12, the rotating connection part 13, the shaft hole 131, the hook 134, the guide notch 14, the air-avoiding groove 15, the convex rib 16, the movable hole 18, the limit part 19, the ball groove 17 and the positioning notch 132 thereon can be integrally injection molded with the bracket body 11, with a simple structure and high production efficiency. Powder metallurgy molding is to inject the raw material containing metal powder into a blank through an injection molding device, and then sinter the blank to obtain the required metal part.

[0062] like Figure 1-11The reciprocating razor head shown in the figure comprises a swing head support 2 and a razor 10, wherein the razor 10 comprises the above-mentioned fixed blade fixing frame 1, a fixed blade 3, a movable blade 4 and a movable blade transmission device, wherein the fixed blade 3 is integrally formed of a metal plate, and comprises a skin-contacting sheet 31 located at the top for contacting with the skin during shaving, wherein the skin-contacting sheet 31 is provided with a plurality of fixed blade teeth 32 on the front side and / or the rear side, and wherein the skin-contacting sheet 31 is integrally formed with a downwardly facing edge 33 on the left and right ends, and the edge 33 is in contact with the skin-contacting sheet 31. The top of the sheet 31 has a smooth transition, and the edging 33 cooperates with the step 12 and is fixed by welding or bonding. When shaving, the top surface of the skin-contacting sheet 31 is moved against the skin, and the edging 33 can improve the skin feel. The movable blade 4 is arranged at the bottom of the fixed blade 3, and the movable blade transmission device is used to drive the movable blade 4 to reciprocate left and right relative to the fixed blade 3. The fixed blade fixing frame 1 is rotatably connected to the swing head bracket 2 through a rotating connection structure so that the razor 10 can swing on the swing head bracket 2, and its structure is simple. The swing head bracket 2 is used to connect with the external body. When working, the hand holds the external body, and the razor moves against the skin to shave hair. The razor 10 is close to the skin, and the body can swing at a certain angle relative to the razor 10, so that when the hand holds the body to shave different parts, the hand can adjust and obtain a comfortable posture.

[0063] Preferably, the rotating connection structure includes 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. A rotating shaft 5 inserted into the axial hole 131 is fixed on the swing head bracket 2, and a torsion spring 6 is sleeved on the outer side of the rotating shaft 5. When the razor 10 rotates relative to the swing head bracket 2, the torsion spring 6 is used to drive the razor 10 to rotate and reset. The structure is simple and easy to assemble.

[0064] Preferably, the left and right ends of the bracket body 11 are wide and the middle is narrow, and wide parts 111 are formed at the left and right ends respectively, and a narrow part 112 is formed between the left and right wide parts 111. The front and / or rear side of the bracket body 11 forms a laterally concave avoidance groove 15 between the left and right wide parts 111, and the step 12 is arranged on the outer edge of the wide part 111. The fixed blade tooth 32 is a structure with the outer end suspended and is arranged corresponding to the avoidance groove 15. A thickened ball head 34 is provided on the outer end of the fixed blade tooth 32, and the movable blade 4 is located on the inner side of the ball head 34. The structure is simple, which is conducive to hooking up long hair for cutting and has high hair feeding efficiency. Hair cutting occurs at the position of the avoidance groove 15, which is conducive to chip removal and cleaning of the razor 10. The ball head 34 is smooth and increases the skin feel.

[0065] Preferably, the movable knife transmission device comprises a movable knife bracket 71 fixedly connected to the movable knife 4, and the bottom of the movable knife bracket 71 is connected to a transmission joint 72, such as Figure 1As shown, the driving method can be to install a rocker arm 100 in the rocker head bracket 2, one end of the rocker arm is connected to the transmission joint 72, and the other end is connected to the eccentric wheel on the external body, the rotation of the eccentric wheel drives the rocker arm to swing, and the rocker arm drives the transmission joint 72 to reciprocate left and right; the driving method can also be to connect the transmission joint 72 to the eccentric wheel, and drive the transmission joint 72 to reciprocate left and right through the rotation of the eccentric wheel.

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

[0067] The support body 11 is provided with an active hole 18 for the movable knife support 71 to reciprocate left and right, and the support body 11 is provided with a limiter 19 protruding laterally from the active hole 18, and the limiter 19 limits the movable knife support 71 from the front-back direction so that the movable knife 4 moves in the area inside the ball head 34. In one embodiment, Figure 5 As shown, the plurality of limiting portions 19 provide guides for the movable knife bracket 71 to slide left and right.

[0068] In another embodiment, if Figure 6 and 7 As shown, the stopper 19 can allow the movable knife support 71 to move in the front-to-back direction, and the movable area of ​​the movable knife 4 in the front-to-back direction is located inside the ball head 34, so as to prevent the movable knife teeth 41 from hitting the ball head 34 and causing damage. Figure 4 , 8 -11, further, the bottom of the fixed knife fixing frame 1 is connected and fixed 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 guiding the movable knife bracket 71 to slide left and right, the width of the guide groove 92 is smaller than the gap between the front and rear limiting portions 19, the fixed knife fixing frame 1 is provided with a hook 134, the plastic guide 9 is provided with a hook hole 93, the hook 134 is clamped in the hook hole 93 to fix the plastic guide 9 to the bottom of the fixed knife fixing frame 1, the structure is simple and easy to assemble. The guide groove 92 formed by the plastic guide 9 for guiding the movable knife bracket 71 to slide left and right is conducive to reducing the noise generated by friction when the movable knife bracket 71 moves at high speed and reducing the temperature rise caused by friction.

[0069] The limiting portion 19 also prevents the movable blade teeth 41 from hitting the ball head 34 and causing damage when the plastic guide member 9 is not installed.

[0070] Preferably, if Figure 4 and 8As shown, the bottom of the bracket 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 bracket 2 includes left and right arms 21, the 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 side wall of the guide notch 14 or the first notch 95 limits the rotation range of the arm 21 relative to the razor 10. The structure is simple and convenient for assembling the razor 10 with the swing head bracket 2. Figure 9a-9b As shown, when not subjected to external force, the torsion spring 6 deflects the shaver 10 to one side. Under the action of external force, the shaver 10 can rotate from one position to a second position, and rebound to the initial position when the external force is removed.

[0071] Preferably, the guide notch 14 penetrates 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 on the upper side of the rotating connection part 13, the top of the support arm 21 is close to or passes through the through hole 141, and the rotating shaft 5 is fixed to the upper end of the support arm 21, which is conducive to reducing the distance between the rotation center corresponding to the shaft hole 131 and the skin-contacting surface of the fixed blade. When shaving, since the razor 10 moves against the skin, there is friction between the skin-contacting surface of the fixed blade and the skin, which will generate torque. The smaller the distance between the rotation center and the skin-contacting surface of the fixed blade, the smaller the torque, which is conducive to preventing the razor 10 from flipping over on the skin.

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

[0073] Preferably, a positioning notch 132 is provided at the bottom of the rotating connection part 13, and a slope 133 is provided at the bottom of the positioning notch 132 which is inclined to the outside of the entrance of the shaft hole 131, and a second notch 94 corresponding to the positioning notch 132 is provided on the plastic guide 9 to facilitate the alignment and assembly of the rotating shaft 5 into the shaft hole 131.

[0074] Preferably, the bracket body 11 has a convex rib 16 protruding upward along the left-right direction, and the convex rib 16 is arranged near the outer edge of the narrow portion 112. The convex rib 16 supports the movable knife 4 from below and is supported near the root of the movable knife teeth 41. Fig.10As shown, the movable blade teeth 41 are closer to the fixed blade to improve the cutting sharpness. The movable blade 4 is made of a metal sheet, and between the movable blade 4 and the fixed blade 3, the head of the movable blade teeth 41 of the movable blade 4 first contacts the fixed blade teeth 32. Under the action of the rib 16, the movable blade 4 is deformed toward one side of the fixed blade 3 with the head of the movable blade teeth 41 as a fulcrum, so that the tooth body of the movable blade teeth 41 is close to the tooth body of the fixed blade teeth 32. Figure 6 As shown, during assembly, the movable knife 4 is first placed between the fixed knife fixing frame 1 and the fixed knife 3, and the movable knife is supported from the bottom by the convex rib 16. When the fixed knife 3 is then installed downward into the fixed knife fixing frame 1, the head of the movable knife tooth 41 first contacts the fixed knife tooth 32, as shown in FIG. Figure 7 As shown, when the fixed knife 3 and the fixed knife fixing frame 1 continue to be installed in place, the heads of the movable knife teeth 41 on the front and rear sides are supported on the bottom of the fixed knife, and the movable knife 4 is elastically bent and deformed toward one side of the fixed knife 3 under the action of the convex rib 16, so that the tooth body of the movable knife tooth 41 is close to the tooth body of the fixed knife tooth 32. For the entire movable knife tooth, the head of the movable knife tooth has the best fit with the tooth body of the fixed knife tooth, which can effectively ensure the fit between the head of the movable knife tooth and the position near the head and the fixed knife tooth. Since the head of the movable knife tooth is close to the outside, it cuts the hair first, thereby improving the sharpness of cutting the hair.

[0075] Another thing is that the fixed knife 3 is made of metal sheet to facilitate better shaving. When the fixed knife 3 is installed and fixed on the step 12 with its left and right ends 33, and the front and rear 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 movable knife, and prevent the fixed knife from floating in the area between the left and right edges to reduce the fit between the movable knife teeth and the fixed knife teeth, thereby affecting the sharpness of the cutting.

[0076] Furthermore, if Fig.10 As shown, a ball groove 17 is provided on the inner side of the convex rib 16 on the bracket body 11, and a ball 8 is provided in the ball groove 17 for supporting the movable knife 4 from below. When the movable knife 4 reciprocates left and right, it drives the ball 8 to roll in the ball groove 17, which is beneficial to reduce the noise generated by friction and movement, and avoid excessive temperature rise of the razor due to the movement of the movable knife.

[0077] The reciprocating shaving head has a simple structure, is easy to produce and assemble, has a good skin feel, and has a high hair feeding efficiency.

Claims

1. A fixed blade fixing frame (1) for a reciprocating shaving head, characterized in that: The invention is formed by powder metallurgy and comprises a support body (11). The support body (11) is wide at the left and right ends and narrow in the middle. A wide portion (111) is formed at the left and right ends respectively, and a narrow portion (112) is formed between the left and right wide portions (111). A laterally inwardly concave air avoidance groove (15) is formed between the left and right wide portions (111) on the front side and / or the rear side of the support body (11). A sunken U-shaped step (12) is integrally formed on the outer edge of the wide portion (111) and surrounds from the front side to the rear side. Two left and right rotating connection structures are integrally formed on the support body (11). The rotating connection structure comprises a rotating connection portion (13) integrally formed on the support body (11). The rotating connection portion (13) is provided with an axial hole (131) arranged along the X-axis direction.

2. The fixed blade fixing frame (1) according to claim 1, characterized in that: A guide notch (14) is provided at the bottom of the bracket body (11) on the outer side of the end of the shaft hole (131), and the width of the guide notch (14) gradually decreases from bottom to top.

3. The fixed blade fixing frame (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 opening (141); the shaft hole (131) is located in the area corresponding to the through opening (141) and is arranged on the upper side of the rotating connection part (13).

4. The fixed blade fixing frame (1) according to claim 2, characterized in that: A positioning notch (132) is provided at the bottom of the rotating connection portion (13), and an inclined surface (133) inclined toward the outside of the entrance of the shaft hole (131) is provided at the bottom of the positioning notch (132).

5. The fixed blade fixing frame (1) according to claim 2, characterized in that: The rotating connection part (13) protrudes downward below the bottom of the bracket body (11), and a hook (134) is provided at the other side of the lower end of the rotating connection part (13) located at the entrance of the shaft hole (131).

6. A fixed knife fixing frame (1) according to any one of claims 1 to 5, characterized in that: The support body (11) has a convex rib (16) protruding upwards and arranged in the left-right direction. The convex rib (16) is arranged close to the outer edge of the narrow portion (112). The convex rib (16) and the support body (11) are integrally formed.

7. The fixed blade fixing frame (1) according to claim 6, characterized in that: A ball groove (17) is provided on the bracket body (11) at the inner side of the convex rib (16).

8. A fixed blade fixing frame (1) according to any one of claims 1 to 5 and 7, characterized in that: The support body (11) is provided with a movable hole (18) capable of allowing the movable knife support (71) to reciprocate left and right, and the support body (11) is provided with a limiting portion (19) protruding laterally in the movable hole (18).

9. A reciprocating razor head with a fixed blade fixing frame (1) according to any one of claims 1 to 8, comprising a swing head support (2) and a razor (10), characterized in that: The razor (10) comprises a fixed blade fixing frame (1), a fixed blade (3), a movable blade (4) and a movable blade transmission device. The fixed blade (3) is integrally formed from a metal plate and comprises a skin-contacting sheet (31) located at the top and used for contacting with the skin during shaving. The skin-contacting sheet (31) is provided with a plurality of fixed blade teeth (32) on the front side and / or the rear side. The skin-contacting sheet (31) is integrally formed with a downwardly facing edge (33) on both left and right ends. The edge (33) smoothly transitions with the top of the skin-contacting sheet (31), and the edge (33) cooperates with the step (12). The movable blade (4) is fixed by welding or bonding. The movable blade (4) is arranged at the bottom of the fixed blade (3). The movable blade transmission device is used to drive the movable blade (4) to move back and forth relative to the fixed blade (3). A rotating shaft (5) is fixed on the swing head bracket (2). The rotating shaft (5) is inserted into the shaft hole (131) so that the shaver (10) is rotatably connected to the swing head bracket (2). A torsion spring (6) is sleeved on the outer side of the rotating shaft (5). When the fixed blade fixing bracket (1) rotates relative to the swing head bracket (2), the torsion spring (6) is used to drive the fixed blade fixing bracket (1) to rotate and reset.

10. A reciprocating shaver head according to claim 9, characterized in that: The fixed blade tooth (32) is a structure with its outer end suspended in the air and is arranged corresponding to the air avoidance groove (15). A thickened ball head (34) is arranged on the outer end of the fixed blade tooth (32), and the movable blade (4) is located on the inner side of the ball head (34).

11. A reciprocating razor head according to claim 10, characterized in that: The movable knife transmission device comprises a movable knife bracket (71) fixedly connected to the movable knife (4); the bottom of the movable knife bracket (71) is connected to a transmission joint (72); the bracket body (11) is provided with a movable hole (18) capable of allowing the movable knife bracket (71) to reciprocate left and right; the bracket body (11) is provided with a limiting portion (19) protruding laterally in the movable hole (18); the limiting portion (19) limits the movable knife bracket (71) from the front-back direction so that the movable knife (4) moves in the area inside the ball head (34).

12. A reciprocating razor head according to claim 11, characterized in that: A plastic guide member (9) is connected and fixed to the bottom of the fixed knife fixing frame (1); the plastic guide member (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 guiding the movable knife bracket (71) to slide left and right; the width of the guide groove (92) is smaller than the gap between the front and rear limiting portions (19); the fixed knife fixing frame (1) is provided with a hook (134); the plastic guide member (9) is provided with a hook hole (93); the hook (134) is hooked in the hook hole (93) to fix the plastic guide member (9) to the bottom of the fixed knife fixing frame (1).

13. A reciprocating razor head according to claim 12, characterized in that: The bottom of the support body (11) is provided with a guide notch (14) on the outer side of the port of the shaft hole (131), and the width of the guide notch (14) gradually decreases from bottom to top. The plastic guide member (9) is provided with a first notch (95) corresponding to the guide notch (14). The swing head support (2) includes left and right 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).

14. A reciprocating razor head according to claim 13, 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 toward 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).

15. A reciprocating shaver head according to any one of claims 9 to 14, characterized in that: The support body (11) is provided with a convex rib (16) protruding upwards and arranged in the left-right direction. The convex rib (16) is arranged near the outer edge of the narrow portion (112). The convex rib (16) supports the movable knife (4) from below. The movable knife (4) is made of a metal sheet, and between the movable knife (4) and the fixed knife (3), the head of the movable knife tooth (41) of the movable knife (4) first contacts the fixed knife tooth (32). Under the action of the convex rib (16), the movable knife (4) is deformed toward one side of the fixed knife (3) with the head of the movable knife tooth (41) as a fulcrum, so that the tooth body of the movable knife tooth (41) is close to the tooth body of the fixed knife tooth (32).

16. A reciprocating razor head according to claim 15, characterized in that: A ball groove (17) is provided on the support body (11) at the inner side of the convex rib (16), and a ball (8) is provided in the ball groove (17) for supporting the movable knife (4) from below.

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