Fixed cutter fixing frame and reciprocating type shaving cutter head

Abstract

The utility model discloses a stationary knife fixing frame which is formed by powder metallurgy and comprises a support body, sinking steps are integrally formed on the edges of the left end and the right end of the support body, and a left rotary connecting structure and a right rotary connecting structure are integrally formed on the support body. The utility model further discloses a reciprocating type shaving cutter head which comprises a head swinging support and a shaving cutter, the shaving cutter comprises a fixed cutter fixing frame, a fixed cutter, a movable cutter and a movable cutter transmission device, the fixed cutter is integrally formed by a metal plate and comprises a skin attaching piece which is located on the top and used for attaching to the skin during shaving, downward covering edges are integrally formed at the left end and the right end of the skin attaching piece, and the covering edges are arranged on the fixed cutter fixing frame. The covering edge is in smooth transition with the top of the skin attaching piece, the covering edge and the step are matched and fixed in a welded or bonded mode, the movable cutter is arranged at the bottom of the fixed cutter, the movable cutter transmission device is used for driving the movable cutter to reciprocate left and right relative to the fixed cutter, and the fixed cutter fixing frame is rotationally connected to the swing head support through a rotary connecting structure so that the razor can swing on the swing head support. The structure is simple, and production and assembly are easy.

Description

Technical field

[0001] The utility model relates to a fixed blade fixing frame and also relates to a reciprocating shaving blade head. [Background Technology]

[0002] In the Chinese patent publication number CN208246876U, entitled "A Swingable Reciprocating Electric Shaver Head," the fixed blade is supported by the front and rear edges of the fixed blade bracket. The side surfaces of the fixed blade are bent downward and welded to the side or bottom surface of the fixed blade bracket. In order to prevent the two ports of the fixed blade from irritating the skin, a fixing ring 70 is provided on the outside of the ports to block them. However, the fixing ring protrudes from the outside of the fixed blade, which has a certain impact 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 help comb and hook long hair into 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. Figure 12 As shown, one direction of our research is to provide downward-facing edging 1a at both ends of the fixed blade to achieve a smoother and more comfortable skin feel. Suspended fixed blade teeth 1a1 are provided on both sides of the fixed blade to facilitate hooking long hair into the hair feed slot for cutting. To reduce the size of the razor, a flat metal bracket 1d is used to secure the fixed blade. A plastic bracket 1f is fixed to the bottom of the metal bracket, and a rotating connection structure 1f1 is provided on the plastic bracket to rotatably connect it to the base or related swing head bracket. The metal bracket is stamped and turned from sheet metal, while the plastic bracket is injection molded. During production and assembly, the multiple positioning posts 1f2 on the plastic bracket must first be inserted from bottom to top into the multiple positioning holes 1d1 of the metal bracket. The positioning posts are then deformed by hot pressing from above to secure the plastic bracket to the metal bracket. Only then can the movable blade and fixed blade be installed sequentially downward above the metal bracket. In the continuous development of reciprocating razor heads, our company has proposed another new technical solution to simplify the structure and production and assembly process of reciprocating razor heads.

[0005] The present invention is made based on this situation. [Utility Model Content]

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

[0007] In order to solve the above technical problems, the utility model provides a fixed knife fixing frame for a reciprocating shaving head, which is formed by powder metallurgy and includes a bracket body. The left and right end edges of the bracket body are integrally formed with sunken steps, and the bracket body is integrally formed with two left and right rotating connection structures. The rotating connection structure is used to rotatably connect the bracket body to the swing head bracket so that the fixed knife fixing frame can rotate around the X-axis.

[0008] In the fixed blade fixing bracket as described above, the rotation connection structure includes a rotation connection portion integrally formed on the bracket body, and the rotation connection portion is provided with an axial hole arranged along the X-axis direction.

[0009] In the fixed knife fixing bracket as described above, a guide notch is provided at the bottom of the bracket body, located outside the end of the shaft hole, and the width of the guide notch gradually decreases from bottom to top.

[0010] In the fixed blade fixing bracket as described above, the guide notch penetrates the bracket body from bottom to top and forms 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.

[0011] In the fixed blade fixing bracket as described above, a positioning notch is provided at the bottom of the rotating connection portion, and an inclined surface is provided at the bottom of the positioning notch which is inclined toward the outside of the entrance of the shaft hole.

[0012] In the fixed knife fixing bracket as described above, the rotating connecting portion protrudes downward below the bottom of the bracket body, and a hook is provided at the lower end of the rotating connecting portion on the other side of the entrance of the shaft hole.

[0013] As described above, a fixed knife fixing bracket, 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 side and / or the rear side of the bracket body forms a laterally concave air avoidance groove between the left and right wide portions, and the step is arranged on the outer edge of the wide portion.

[0014] In the fixed knife fixing bracket as described above, a rib is protruded upward on the bracket body and arranged in the left-right direction. The rib is arranged close to the outer edge of the narrow portion, and the rib is integrally formed with the bracket body.

[0015] 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.

[0016] 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 from the movable hole.

[0017] In the above-mentioned fixed blade fixing bracket, the bracket body is a flat plate whose length is arranged along the X-axis direction.

[0018] Another technical problem to be solved by the present invention is to provide a reciprocating shaving head with the characteristics of simple structure and convenient production and assembly.

[0019] In order to solve the above technical problems, the utility model provides a reciprocating razor head, comprising a swinging head bracket and a razor, the razor comprising the fixed blade fixing bracket, the fixed blade, the movable blade and the movable blade transmission device as described above, the fixed blade being integrally formed of a metal plate, and comprising a skin-contacting piece located at the top for contacting with the skin when shaving, the skin-contacting piece being provided with a plurality of fixed blade teeth on the front and / or rear sides, the skin-contacting piece being integrally formed with downwardly facing edges on the left and right ends, the edges being smoothly transitioned to the top of the skin-contacting piece, the edges being matched with the steps and being fixed by welding or bonding, the movable blade being arranged at the bottom of the fixed blade, the movable blade transmission device being used to drive the movable blade to reciprocate left and right relative to the fixed blade, the fixed blade fixing bracket being rotatably connected to the swinging head bracket via a rotating connection structure so that the razor can swing on the swinging head bracket.

[0020] As described above, the reciprocating shaving head, the rotating connection structure includes a rotating connection part integrally formed on the bracket body, the rotating connection part is provided with an axial hole arranged along the X-axis direction, the swing head bracket is fixed with a rotating shaft inserted into the axial hole, and the outer side of the rotating shaft is provided with a torsion spring. When the fixed blade fixing bracket rotates relative to the swing head bracket, the torsion spring is used to drive the fixed blade fixing bracket to rotate and reset.

[0021] As described above, a reciprocating razor head, wherein 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 side and / or the rear side of the bracket body forms a laterally concave air avoidance groove between the left and right wide portions, the step is arranged on the outer edge of the wide portion, the fixed blade teeth are of a structure with the outer ends suspended and are arranged corresponding to the air avoidance groove, a thickened ball head is provided on the outer end of the fixed blade teeth, and the movable blade is located on the inner side of the ball head.

[0022] As described above, the reciprocating shaving head, 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, and the bracket body is provided with a limiting portion protruding laterally in the movable hole, and the limiting portion limits the movable knife bracket from the front and rear directions so that the movable knife moves in the area inside the ball head.

[0023] According to the reciprocating razor head described above, a plastic guide is connected and fixed to the bottom of the fixed blade fixing frame, and the plastic guide is provided with a guide portion inserted into the movable hole from bottom to top, and the guide portion is provided with a guide groove for guiding the movable blade bracket to slide left and right, and the width of the guide groove is smaller than the gap between the front and rear limit parts, the fixed blade fixing frame is provided with a hook, and the plastic guide is provided with a hook hole, and the hook is locked in the hook hole to fix the plastic guide to the bottom of the fixed blade fixing frame.

[0024] As described above, a reciprocating shaver head is provided with a guide notch 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. The plastic guide member is provided with a first notch corresponding to the guide notch. The swing head bracket includes left and right arms, the rotating shaft is fixed on the arm, the upper end of the arm is inserted into the guide notch and the first notch, and the rotation range of the arm relative to the razor is limited by the side wall of the guide notch or the first notch.

[0025] In the reciprocating shaver head as described above, a positioning notch is provided at the bottom of the rotating connection portion, 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.

[0026] As described above, a reciprocating razor head has an upward protrusion on the bracket body with a convex rib 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.

[0027] In the reciprocating shaver head as described above, a ball groove is provided on the inner side of the rib on the support body, and a ball is provided in the ball groove for supporting the movable shaver from below.

[0028] Compared with the prior art, the utility model has the following advantages:

[0029] 1. The fixed blade fixing frame of the utility model is formed by powder metallurgy, which is convenient for injection molding the step, the rotating connection structure and the bracket body. 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 shaving head.

[0030] 2. The fixed knife fixing bracket of the utility model is provided with a guide notch at the outside of the port of the shaft hole at the bottom of the bracket body, which is convenient for guiding the support arm on the swing head bracket when it 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.

[0031] 3. The guide notch of the present invention penetrates the bracket body from bottom to top and forms a through-hole. The axial hole is located in the area corresponding to the through-hole and is arranged on the upper part of the rotating connection part, which is conducive to reducing the distance between the rotation center and the skin-contacting surface of the fixed blade, and is conducive to preventing the razor from flipping over on the skin during shaving.

[0032] 4. The utility model 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 moving too far forward and backward when the plastic guide is not assembled, causing the movable knife teeth to hit the ball head and damage the movable knife teeth.

[0033] 5. The reciprocating shaving head of the utility model has a simple structure, is easy to produce and assemble, and has edges at both ends of the fixed blade, which has a good skin feel.

[0034] 6. The fixed blade teeth of the utility model are of a structure with the outer ends suspended in the air and are arranged corresponding to the air-avoidance groove, which is conducive to hooking up long hair for cutting, with high hair feeding efficiency. Hair cutting occurs at the position of the air-avoidance groove, which is conducive to chip removal and cleaning of the shaver. The outer ends of the fixed blade teeth are provided with thickened ball heads, which can increase the skin feel.

[0035] 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 first contacts the fixed knife teeth. Under the action of the 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 sharpness of the cutting.

[0036] 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 rear sides of the fixed knife are suspended fixed knife teeth, the 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, which reduces the fit between the movable and fixed knife teeth and affects the sharpness of the cutting.

[0037] 8. The utility model provides a rolling ball at the bottom of the movable blade for support, which helps 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

[0038] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings, wherein:

[0039] Figure 1 This is an exploded view of a reciprocating shaving head of the utility model;

[0040] Figure 2 This is a structural diagram of a fixed knife fixing frame of the utility model;

[0041] Figure 3 This is a schematic diagram of the bottom structure of a fixed knife fixing frame of the utility model;

[0042] Figure 4 This is a structural diagram of an embodiment of the razor of the present utility model;

[0043] Figure 5 This is a structural diagram of an embodiment of the shaver of the present invention without a plastic guide member installed;

[0044] Figure 6-7 This is an installation diagram showing how the movable knife is deformed toward the stationary knife during assembly of the stationary knife and the stationary knife fixing frame.

[0045] Figure 8 This is a structural diagram of a reciprocating shaving head of the utility model;

[0046] Figures 9a-9b It is a side view of two different reciprocating shaving heads of the utility model;

[0047] Figure 10 This utility model is a reciprocating shaving head Figure 11 Cross-sectional view in the middle BB direction;

[0048] Figure 11 This utility model is a reciprocating shaving head Figure 10 Cross-sectional view in the AA direction;

[0049] Figure 12 This is an exploded reference image of a reciprocating razor. [Specific implementation method]

[0050] The present invention will be further described below with reference to the accompanying drawings:

[0051] like Figures 1 to 7 The figure shows a fixed blade holder 1 for a reciprocating shaving head. The holder is formed of powder metallurgy and includes a support body 11. The left and right edges of the support body 11 are integrally formed with sunken steps 12 for mounting the fixed blade. The support body 11 also includes two integrally formed left and right rotational connection structures. These rotational connection structures are used to rotationally connect the support body 11 to the swing head support 2 so that the fixed blade holder 1 can rotate about the X-axis. The X-axis corresponds to the left-right direction.

[0052] 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 shaving head and its assembly process.

[0053] Preferably, the rotatable connection structure includes a rotatable connection portion 13 integrally formed on the bracket body 11. The rotatable connection portion 13 is provided with an axial hole 131 arranged along the X-axis direction. The axial hole 131 cooperates with the rotating shaft 5 fixed to the swing head bracket 2 to achieve rotatable connection. This simple structure facilitates 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 instead of the axial hole, but this is not shown here.

[0054] 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. The guide notch 14 is conducive to making the position of the shaft hole 131 on the fixed knife fixing frame 1 further upward. 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 and inserted into the shaft hole 131.

[0055] Preferably, the guide notch 14 extends from bottom to top through the support body 11 to form a through-hole 141. The axial hole 131 is located within the region corresponding to the through-hole 141 and is positioned above the rotating connection portion 13, that is, upwardly offset from the middle position of the rotating connection portion 13 in the vertical direction. After the fixed blade 3 is mounted on the fixed blade fixing frame 1, the top surface of the fixed blade is a skin-contacting surface. The through-hole 141 facilitates the arm of the swing head support 2 to be positioned further upward within the guide notch 14, so that the rotating shaft 5 fixed to the arm is positioned further upward, thereby facilitating a reduction in the distance between the rotation center corresponding to the axial hole 131 and the skin-contacting surface of the fixed blade. During shaving, as the razor 10 moves against the skin, friction between the skin-contacting surface of the fixed blade and the skin generates torque. The smaller the distance between the rotation center and the skin-contacting surface of the fixed blade, the smaller the torque, which helps prevent the razor 10 from flipping over on the skin.

[0056] 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 while arranging the shaft hole 131 further upward.

[0057] 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.

[0058] Preferably, if Figure 2-5In the embodiment shown, 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.

[0059] Preferably, the rotating connection part 13 protrudes downward below the bottom of the bracket body 11, and the lower end of the rotating connection part 13 is located on the other side of the entrance of the shaft hole 131 and is provided with a hook 134 to facilitate the installation of other components at the bottom of the bracket body 11, such as the plastic guide 9.

[0060] 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 air avoidance groove 15 between the left and right wide parts 111. The step 12 is arranged on the outer edge of the wide part 111, and the step 12 surrounds the wide part 111 from the front side 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 top surfaces of the left and right ends of the razor are smoothly transitioned to improve the skin feel.

[0061] Preferably, the bracket body 11 has an upward protrusion with a rib 16 arranged in the left and right directions. When the fixed knife is installed, the rib can form a gap with the fixed knife to accommodate the movable knife. The rib supports the movable knife from below so that the movable knife can be better close to the fixed knife. The rib 16 is arranged close to the outer edge of the narrow portion 112 so that the rib 16 can be better close to the movable knife teeth. The rib 16 is integrally formed with the bracket body 11, with a simple structure and convenient production.

[0062] Further, if Figure 1-3 In the embodiment shown in FIG10 , a ball groove 17 is provided on the inner side of the rib 16 on the bracket body 11 for mounting a ball to support the movable knife from below to reduce friction.

[0063] 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. The bracket body 11 is provided with a limiting portion 19 that protrudes 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 too large a range of movement forward and backward.

[0064] Preferably, the support body 11 is a flat plate with its length arranged along the X-axis direction, which has a simple structure and is conducive to reducing the volume of the shaver.

[0065] The fixed blade holder 1, including the step 12, rotating connection portion 13, shaft hole 131, hook 134, guide notch 14, clearance groove 15, rib 16, movable hole 18, stopper 19, ball groove 17, and positioning notch 132, can be integrally injection molded with the holder body 11, resulting in a simple structure and high production efficiency. Powder metallurgy molding involves injecting raw materials containing metal powder into a blank through an injection molding machine, and then sintering the blank to obtain the desired metal part.

[0066] like Figure 1-11 The reciprocating shaver head shown in the figure includes a swing head support 2 and a shaver 10. The shaver 10 includes the above-mentioned fixed blade fixing frame 1, fixed blade 3, movable blade 4 and movable blade transmission device. The fixed blade 3 is integrally formed from a metal plate and includes a skin-contacting sheet 31 located at the top for contacting the skin when shaving. The skin-contacting sheet 31 is provided with a plurality of fixed blade teeth 32 on the front and / or rear sides. The skin-contacting sheet 31 is integrally formed with downward-facing edges 33 on the left and right ends. The edges 33 are in contact with the skin-contacting sheet. 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 move back and forth 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. Its structure is simple. The swing head bracket 2 is used to connect to 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 of the body, the hand can adjust and obtain a comfortable posture.

[0067] 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. The swing head bracket 2 is fixed with a rotating shaft 5 inserted into the axial hole 131, and a torsion spring 6 is provided on the outer side of the rotating shaft 5. When the shaver 10 rotates relative to the swing head bracket 2, the torsion spring 6 is used to drive the shaver 10 to rotate and reset. The structure is simple and easy to assemble.

[0068] Preferably, the left and right ends of the bracket body 11 are wide and the middle is narrow, forming wide parts 111 at the left and right ends respectively and a narrow part 112 between the left and right wide parts 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 parts 111. 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 air 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 air avoidance groove 15, which is conducive to chip removal and cleaning of the shaver 10. The ball head 34 is smooth and increases the skin feel.

[0069] Preferably, the movable knife transmission device includes 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 1 As 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 move back and forth 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 move back and forth left and right through the rotation of the eccentric wheel.

[0070] The movable knife support 71 is made of metal and is welded and fixed on the bottom of the movable knife.

[0071] The bracket body 11 is provided with a movable hole 18 for the movable knife bracket 71 to reciprocate left and right. The bracket body 11 is provided with a limit portion 19 protruding laterally from the movable hole 18. The limit portion 19 limits the movable knife bracket 71 from the front and back directions 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.

[0072] In another embodiment, Figure 6 and 7 As shown, the limiting portion 19 can allow the movable knife bracket 71 to move in the front-back direction, and make the movable area of the movable knife 4 in the front-back direction located inside the ball head 34, so as to avoid the movable knife teeth 41 hitting the ball head 34 and causing damage. In order to make the movable knife bracket 71 have a sliding guide, as shown in FIG. Figure 4 、 8-11, further, a plastic guide 9 is connected and fixed to the bottom of the fixed blade fixing frame 1. The plastic guide 9 is provided with a guide portion 91 that is inserted from bottom to top into the movable hole 18. The guide portion 91 is provided with a guide groove 92 for guiding the movable blade 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 blade fixing frame 1 is provided with a hook 134. The plastic guide 9 is provided with a hook hole 93. The hook 134 is engaged with the hook hole 93 to fix the plastic guide 9 to the bottom of the fixed blade fixing frame 1. This structure is simple and easy to assemble. The guide groove 92 formed by the plastic guide 9 for guiding the movable blade bracket 71 to slide left and right is beneficial to reducing the noise generated by friction when the movable blade bracket 71 moves at high speed and reducing the temperature rise caused by friction.

[0073] The limiting portion 19 prevents the movable blade 41 from hitting the ball head 34 and causing damage when the plastic guide 9 is not installed.

[0074] Preferably, if Figure 4 and 8 As 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. The side wall of the guide notch 14 or the first notch 95 limits the rotation range of the arm 21 relative to the shaver 10. This structure is simple and convenient for assembling the shaver 10 with the swing head bracket 2. Figures 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.

[0075] Preferably, the guide notch 14 extends from bottom to top through the bracket body 11 and forms a through-hole 141. The axial hole 131 is located in the area corresponding to the through-hole 141 and is disposed higher on the rotating connection portion 13. The top of the support arm 21 is close to or passes through the through-hole 141. The rotating shaft 5 is fixed to the upper end of the support arm 21, which helps to reduce the distance between the rotation center corresponding to the axial hole 131 and the skin-contacting surface of the fixed blade. When shaving, as the razor 10 moves against the skin, friction between the skin-contacting surface of the fixed blade and the skin generates torque. The smaller the distance between the rotation center and the skin-contacting surface of the fixed blade, the smaller the torque, which helps to prevent the razor 10 from flipping over on the skin.

[0076] Preferably, the left and right arms 21 are provided by a U-shaped metal frame, which is formed by bending a rigid metal plate, so that the outer side of the arm 21 is flush or substantially flush with the outer side of the shaver 10 while reducing the volume of the reciprocating shaving head. Figure 8 、 9a and Figure 11 as shown; or as Figure 9b As shown, the support arm 21 is located on the inner side of the edge 33.

[0077] 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. 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.

[0078] Preferably, the bracket body 11 has a rib 16 protruding upward along the left and right directions. The rib 16 is arranged near the outer edge of the narrow portion 112. The rib 16 supports the movable knife 4 from below and is supported near the root of the movable knife teeth 41. Figure 10 As shown, the movable blade teeth 41 are brought 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 heads of the movable blade teeth 41 of the movable blade 4 first contact the fixed blade teeth 32. Under the action of the ribs 16, the movable blade 4 is deformed toward the side of the fixed blade 3 with the heads of the movable blade teeth 41 as the fulcrum, so that the teeth of the movable blade teeth 41 are close to the teeth 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. The movable knife is supported from the bottom by the rib 16. When the fixed knife 3 is lowered into the fixed knife fixing frame 1, the head of the movable knife tooth 41 first contacts the fixed knife tooth 32. 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 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 hair.

[0079] 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 ribs 16 can provide better stability for the fixed knife 3 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.

[0080] Further, if Figure 10 As shown, a ball groove 17 is provided on the inner side of the rib 16 on the bracket body 11, and a ball 8 is provided in the ball groove 17 to support the movable blade 4 from below. When the movable blade 4 reciprocates left and right, it drives the ball 8 to roll in the ball groove 17, which is beneficial to reduce friction and noise generated by movement, and avoid excessive temperature rise of the razor due to the movement of the movable blade.

[0081] The reciprocating shaving head has a simple structure, is easy to produce and assemble, has a good skin feel, and has 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 bracket body (11). The left and right end edges of the bracket body (11) are integrally formed with sunken steps (12). The bracket body (11) is integrally formed with two left and right rotating connection structures. The rotating connection structures are used to rotatably connect the bracket body (11) to the swing head bracket so that the fixed knife fixing frame (1) can rotate around the X axis.

2. The fixed blade fixing frame (1) according to claim 1, characterized in that: The rotary connection structure comprises a rotary connection portion (13) integrally formed on the bracket body (11); the rotary connection portion (13) is provided with an axial hole (131) arranged along the X-axis direction.

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

4. The fixed blade fixing frame (1) according to claim 3, characterized in that: 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).

5. The fixed blade fixing frame (1) according to claim 3, characterized in that: A positioning notch (132) is provided at the bottom of the rotating connection portion (13), and an inclined surface (133) is provided at the bottom of the positioning notch (132) which is inclined toward the outside of the entrance of the shaft hole (131).

6. The fixed blade fixing frame (1) according to claim 3, 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 entrance of the shaft hole (131) at the lower end of the rotating connection part (13).

7. A fixed blade fixing frame (1) according to any one of claims 1 to 6, characterized in that: The bracket body (11) is wide at both ends and narrow in the middle, and has wide portions (111) formed at both ends, and a narrow portion (112) 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 bracket body (11), and the step (12) is arranged on the outer edge of the wide portion (111).

8. The fixed blade fixing frame (1) according to claim 7, characterized in that: A convex rib (16) is protruded upward from the bracket body (11) and is 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 bracket body (11) are integrally formed.

9. The fixed blade fixing frame (1) according to claim 8, characterized in that: A ball groove (17) is provided on the bracket body (11) on the inner side of the convex rib (16).

10. A fixed blade fixing frame (1) according to any one of claims 1 to 6, 8 and 9, characterized in that: The bracket body (11) is provided with a movable hole (18) in which the movable knife bracket (71) can reciprocate left and right, and the bracket body (11) is provided with a limiting portion (19) that protrudes laterally from the movable hole (18).

11. A fixed blade fixing frame (1) according to any one of claims 1 to 6, 8 and 9, characterized in that: The support body (11) is a flat plate with a length arranged along the X-axis direction.

12. A reciprocating shaving head with a fixed blade holder (1) according to any one of claims 1 to 11, comprising a swing head support (2) and a razor (10), characterized in that: The shaver (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 piece (31) at the top for contacting with the skin during shaving. The skin-contacting piece (31) is provided with a plurality of fixed blade teeth (32) on the front side and / or the rear side. The skin-contacting piece (31) is integrally formed with downwardly directed edges (33) on both left and right ends. The edges (33) smoothly transition with the top of the skin-contacting piece (31). The edges (33) are matched with the step (12) and 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). The fixed blade fixing frame (1) is rotatably connected to the swing head bracket (2) through a rotating connection structure so that the shaver (10) can swing on the swing head bracket (2).

13. The reciprocating shaving head according to claim 12, characterized in that: The rotary connection structure comprises a rotary connection portion (13) integrally formed on the bracket body (11); the rotary connection portion (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); a torsion spring (6) is sleeved on the outer side of the rotating shaft (5); when the fixed knife fixing frame (1) rotates relative to the swing head bracket (2), the torsion spring (6) is used to drive the fixed knife fixing frame (1) to rotate and reset.

14. The reciprocating shaving head according to claim 13, characterized in that: The bracket body (11) is wide at both ends and narrow in the middle, and has wide portions (111) formed at both ends, and a narrow portion (112) formed between the left and right wide portions (111). A sideways 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 bracket body (11). The step (12) is arranged on the outer edge of the wide portion (111). 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 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).

15. The reciprocating shaving head according to claim 14, 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 inside; the bracket body (11) is provided with a limiting portion (19) protruding laterally from 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).

16. The reciprocating shaving head according to claim 15, characterized in that: The bottom of the fixed knife fixing frame (1) is connected and fixed with a plastic guide member (9), 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 locked in the hook hole (93) to fix the plastic guide member (9) to the bottom of the fixed knife fixing frame (1).

17. The reciprocating shaving head according to claim 16, characterized in that: The bottom of the bracket body (11) is located outside the end of the shaft hole (131) and is provided with a guide notch (14), the width of the guide notch (14) gradually decreases from bottom to top, and the plastic guide member (9) is provided with a first notch (95) corresponding to the guide notch (14), the swing head bracket (2) includes two 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 side wall of the guide notch (14) or the first notch (95) is used to limit the rotation range of the arm (21) relative to the shaver (10).

18. The reciprocating shaving head according to claim 17, 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).

19. A reciprocating shaving head according to any one of claims 14 to 18, characterized in that: The bracket body (11) is provided with a convex rib (16) protruding upward 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. 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).

20. The reciprocating shaving head according to claim 19, characterized in that: A ball groove (17) is provided on the bracket body (11) on the inner side of the convex rib (16), and a ball (8) supporting the movable knife (4) from below is provided in the ball groove (17).

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