Double-toothed fixed blade of reciprocating shaver, fixed blade structure and manufacturing method thereof

Abstract

The present invention discloses a double-toothed fixed blade of a reciprocating razor, wherein the A-type fixed blade teeth and the B-type fixed blade teeth are staggered and arranged, which is conducive to combing long hair and improving the efficiency of long hair entering the hair feed groove, thereby improving the cutting efficiency of relatively long body hair; the present invention also discloses a double-toothed fixed blade structure of a reciprocating razor, wherein an inwardly concave escape groove is provided on a fixed frame, corresponding to the tooth bodies of a plurality of A-type fixed blade teeth and the tooth bodies and retaining edges of the B-type fixed blade teeth, the corresponding tooth bodies are supported from below by the retaining edges, a movable cavity for the movable blade to move within is provided between the fixed blade and the fixed frame, a notch is formed between two adjacent B-type fixed blade teeth at the bottom of the A-type fixed blade teeth, spanning from one hair feed groove to the other hair feed groove, which can effectively prevent hair from being pressed crooked or pressed down and unable to enter the hair feed groove; the present invention also discloses a method for manufacturing the double-toothed fixed blade structure of a reciprocating razor, which is simple in process, and the manufactured fixed blade structure is conducive to shaving relatively long body hair.

Description

Technical field

[0001] The present invention relates to a double-toothed fixed blade of a reciprocating razor, a double-toothed fixed blade structure of a reciprocating razor, and a method for manufacturing the double-toothed fixed blade structure of a reciprocating razor. [Background Technology]

[0002] Current reciprocating razors, such as patent number CN201822177634.0, which is titled as a utility model patent for a reciprocating cutting head, have a fixed blade structure that is usually composed of a fixed blade and a fixed blade bracket. After the fixed blade is fixed to the fixed blade bracket, a row of fixed blade teeth are formed on the left and right sides. The fixed blade teeth are bent by metal sheets and are composed of two bent upper and lower pieces of metal. Since reciprocating razors are small electrical appliances, they are mainly used for shaving beards or body hair. Their fixed blade teeth are very fine and arranged very closely, forming a slender hair feed groove between two adjacent fixed blade teeth. Generally, the width of the fixed blade teeth and the hair feed groove is less than 0.50 mm. Therefore, when shaving slightly longer body hair, the hair feeding performance and efficiency of the hair feed groove are not high enough, and the fine fixed blade teeth easily press the body hair and cannot enter the hair feed groove for cutting.

[0003] The present invention is made based on this situation. [Summary of the invention]

[0004] The technical problem to be solved by the present invention is to provide a double-toothed fixed blade of a reciprocating razor with a simple structure. The A-type fixed blade teeth and the B-type fixed blade teeth are staggered to facilitate combing long hair and improve the efficiency of long hair entering the hair feed groove, thereby improving the cutting efficiency of longer body hair.

[0005] To solve the above technical problems, the present invention provides a double-toothed fixed blade of a reciprocating razor, which is made of a metal sheet and includes a skin-contacting sheet located at the top for contacting the skin when shaving. A plurality of fixed blade teeth arranged in rows are provided on the left and / or right sides of the skin-contacting sheet, and a hair feed groove is provided between two adjacent fixed blade teeth. The fixed blade teeth in the same row include staggered A-type fixed blade teeth and B-type fixed blade teeth. The A-type fixed blade tooth includes a tooth body with one end of the root connected to the skin-contacting sheet and the outer end as a free end, and a thickening head thickened at the outer end of the tooth body; the B-type fixed blade tooth includes a tooth body with one end of the root connected to the skin-contacting sheet, and a retaining edge bent downward from the outer end of the tooth body below the tooth body, and the end of the retaining edge is provided with a connecting edge connecting the multiple retaining edges in the row.

[0006] As described above, in a double-toothed fixed blade of a reciprocating shaver, the B-type fixed blade teeth are formed with smooth heads at their heads by laser melting part of the material or coating the material; or the B-type fixed blade teeth are provided with a recessed portion at their heads that is recessed upward from the retaining edge, and the recessed portion forms a thinned flat head at the head of the B-type fixed blade teeth.

[0007] In the double-toothed fixed blade of the reciprocating shaver as described above, when the head of the B-type fixed blade teeth is formed into a flat head, the flat head is formed into a smooth head by laser melting part of the flat head material or coating the flat head with material.

[0008] As described above, a double-toothed fixed blade of a reciprocating razor has an A-type fixed blade tooth with a bent short piece bent downward from the outer end of the tooth body below the tooth body, and the bent short piece is superimposed on the outer end of the tooth body to form a thickened head at the outer end of the tooth body. Preferably, the thickened head is provided with a coating material; or the outer end of the tooth body of the A-type fixed blade tooth is formed with a thickened head by laser melting part of the tooth body material or coating the outer end of the tooth body with material.

[0009] In the double-toothed stationary blade of the reciprocating shaver as described above, the heads of the A-type stationary blade teeth in the same row are located inside the heads of the B-type stationary blade teeth.

[0010] Another technical problem to be solved by the present invention is to provide a double-toothed fixed blade structure of a reciprocating razor which has a simple structure and is convenient for shaving long body hair.

[0011] In order to solve the above technical problems, the present invention provides a double-toothed fixed knife structure of a reciprocating razor, comprising the above-mentioned double-toothed fixed knife of a reciprocating razor, and a fixed frame for fixing the fixed knife, wherein the fixed frame is provided with a concave air avoidance groove on the left and / or right side, and the air avoidance groove corresponds to the tooth body of multiple A-type fixed knife teeth and the tooth body and retaining edge of type B fixed knife teeth. The A-type fixed knife teeth are suspended in the air, and the connecting edge of the B-type fixed knife teeth is connected to the fixed frame and the retaining edge is limited by the fixed frame, and the corresponding tooth body is supported from the bottom by the retaining edge. A movable cavity for the movable knife to move inside is provided between the fixed knife and the fixed frame, and a notch spanning from one hair feed groove to another hair feed groove is formed between two adjacent B-type fixed knife teeth at the bottom of the A-type fixed knife teeth.

[0012] Another technical problem to be solved by the present invention is to provide a method for manufacturing a double-toothed fixed blade structure of a reciprocating razor, which has the characteristics of simple process and the obtained fixed blade structure is conducive to shaving long body hair.

[0013] To solve the above technical problems, the present invention provides a method for manufacturing a double-toothed fixed blade structure of a reciprocating shaver, the method comprising the following steps:

[0014] A fixing frame is provided, and a concave air-avoiding groove is formed by removing material on the left side and / or the right side of the fixing frame;

[0015] Manufacturing a double-toothed fixed knife: providing a metal sheet, removing material from the metal sheet to form two types of teeth, short teeth and long teeth, on the outside of the metal sheet, and forming a skin-contacting piece on the inside of the metal sheet, wherein the long teeth and the short teeth are arranged in rows on the left and / or right sides of the skin-contacting piece and are arranged alternately, the roots of the long teeth and the short teeth are connected to the skin-contacting piece, the outer end of the short teeth is a free end, the outer end of the long teeth is located outside the outer end of the short teeth, and multiple long teeth in the same row are connected together at the outer ends by connecting edges, and multiple long teeth connected with connecting edges are connected. The middle part of the long teeth are bent downward to form a B-type fixed blade tooth. The B-type fixed blade tooth includes a tooth body at the upper part and a retaining edge below the tooth body. The outer end of the short teeth is thickened to form an A-type fixed blade tooth. The A-type fixed blade tooth includes a tooth body with one end of the root connected to the skin-contacting sheet and the outer end being a free end, and a thickened head thickened at the outer end of the tooth body. The tooth bodies of the A-type fixed blade tooth and the B-type fixed blade tooth are flush, and the outer end of the thickened head is flush with the tooth tip of the B-type fixed blade tooth or located on the inner side of the tooth tip of the B-type fixed blade tooth. Fixed blade mounting parts are provided at both ends of the skin-contacting sheet.

[0016] The double-toothed fixed knife is installed on the fixed frame, wherein the air avoidance groove corresponds to the tooth body of multiple A-type fixed knife teeth and the tooth body and retaining edge of the B-type fixed knife teeth. The connecting edge is located outside the air avoidance groove and is connected and defined on the fixed frame. The fixed knife mounting parts at both ends are respectively fixed to the two ends of the fixed frame and define the skin-adhering piece from both ends.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] 1. The present invention forms a row of stationary blade teeth by staggeredly arranging A-type stationary blade teeth and B-type stationary blade teeth. Since multiple B-type stationary blade teeth are separated by A-type stationary blade teeth, and only the bottom of the B-type stationary blade teeth has a retaining edge, the retaining edge spacing is wider and the arrangement density of the retaining edges is lower. When the skin-contacting sheet is moved against the skin to shave long hair, the gaps between the retaining edges can reduce the obstruction of hair, which is conducive to the hair entering the hair feeding grooves on both sides of the A-type stationary blade teeth. The hair blocked by the B-type stationary blade teeth is easily deflected to both sides to enter the gaps when pressed by the retaining edges, and then further enters the hair feeding groove, which can effectively prevent the hair from being pressed and pressed and unable to enter the hair feeding groove, thereby improving the hair feeding efficiency.

[0019] 2. Since the width of the A-type fixed blade teeth and the B-type fixed blade teeth is less than 0.50 mm, the A-type fixed blade teeth located at the notch are slender teeth, which are easy to insert into the hair to hook the hair for combing, so that the hair can better enter the hair feeding grooves on both sides of the A-type fixed blade teeth for cutting.

[0020] 3. The B-type fixed blade teeth are composed of two pieces of material, a tooth body and a retaining edge, formed at a certain angle. They are connected to a fixed frame via a connecting edge, which limits the retaining edge and has good strength. The A-type fixed blade teeth are arranged between the B-type fixed blade teeth. The B-type fixed blade teeth can protect the A-type fixed blade teeth, and can, to a certain extent, prevent the A-type fixed blade teeth from deformation and damage caused by collisions. The retaining edge forms an outer cover, which can protect the movable blade teeth inside. Furthermore, the heads of the A-type fixed blade teeth in the same row are located inside the heads of the B-type fixed blade teeth. With the B-type fixed blade teeth protecting them from collisions and deformation, the A-type fixed blade teeth can be better protected. Moreover, the heads of the B-type fixed blade teeth protrude outwardly relative to the heads of the A-type fixed blade teeth, thereby forming a concave and convex fixed blade tooth head structure between the heads of the A-type fixed blade teeth and the B-type fixed blade teeth, which is more conducive to combing hair into the hair feed groove.

Brief Description of the Drawings

[0021] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings, wherein:

[0022] Figure 1 This is a bottom view of a first embodiment of a double-toothed fixed blade of a reciprocating shaver according to the present invention;

[0023] Figure 2 This is a bottom view of a second embodiment of a double-toothed fixed blade of a reciprocating shaver according to the present invention;

[0024] Figure 3 This is a bottom view of a third embodiment of a double-toothed fixed blade of a reciprocating razor according to the present invention;

[0025] Figure 4 This is a schematic diagram of how sheet metal removal forms multiple long and short teeth on a sheet metal.

[0026] Figure 5a This is a schematic structural diagram of an embodiment in which a type A fixed blade tooth is formed by superimposing a bent short piece on the outer end of the tooth body to form a thickened head;

[0027] Figure 5b This is a schematic structural diagram of an embodiment of an A-type fixed blade tooth in which a coating material is provided on the outer ends of the bent short piece and the tooth body to form a thickened head;

[0028] Figure 5c This is a schematic structural diagram of an embodiment of an A-type fixed cutter tooth having a coating material provided on the outer end of the tooth body to form a thickened head;

[0029] Figure 5d This is a schematic structural diagram of an embodiment of an A-type fixed cutter tooth having a thickened head produced on the outer end of the tooth body by laser;

[0030] Figure 5eThis is a schematic structural diagram of an embodiment in which a thickened head is generated by laser on the outer ends of the bent short piece and the tooth body of an A-type fixed blade;

[0031] Figure 6a This is a structural diagram of an embodiment of a B-type fixed blade;

[0032] Figure 6b 1. It is a structural schematic diagram of an embodiment of a B-type fixed blade having a flat head;

[0033] Figure 6c This is a schematic structural diagram of an embodiment in which a B-type fixed blade tooth is formed into a rounded head on a flat head by laser;

[0034] Figure 6d This is a structural diagram of an embodiment in which a B-type fixed blade tooth is provided with a coating material on a flat head to form a rounded head;

[0035] Figure 7 This is an exploded view of an embodiment of a reciprocating razor including the double-toothed fixed blade structure of the present invention;

[0036] Figure 8 is a top view of an embodiment of a reciprocating razor including the double-toothed fixed blade structure of the present invention;

[0037] Figure 9 1 is a schematic diagram of the bottom structure of an embodiment of a reciprocating razor including the fixed blade structure of the present invention;

[0038] Figure 10 is a cross-sectional view of an embodiment of a reciprocating razor including a double-toothed fixed blade structure of the present invention at a B-type fixed blade tooth;

[0039] Figure 11 is a cross-sectional view of an embodiment of a reciprocating razor including a double-toothed fixed blade structure of the present invention at the A-type fixed blade teeth;

[0040] Figure 12 It is a schematic diagram of the bottom structure of another embodiment of a reciprocating shaver including the double-toothed fixed blade structure of the present invention;

[0041] Figure 13 The present invention is a cross-sectional view of an embodiment of a reciprocating razor including a double-toothed fixed blade structure at the hair inlet groove. [Specific implementation method]

[0042] The present invention will be further described below in conjunction with the accompanying drawings:

[0043] like Figures 1 to 12The double-toothed fixed blade 1 of a reciprocating razor shown is made of a metal sheet with a thickness of less than 0.20 mm, preferably less than 0.15 mm. It includes a skin-contacting sheet 11 located at the top for contacting the skin when shaving. The left and / or right sides of the skin-contacting sheet 11 are provided with a plurality of fixed blade teeth arranged in rows. A hair feeding groove 12 is provided between two adjacent fixed blade teeth. The fixed blade teeth in the same row include staggered A-type fixed blade teeth 13a and B-type fixed blade teeth 13b. The A-type fixed blade teeth 13a include A tooth body 131 having one end of the root connected to the skin-attaching sheet 11 and a free end at the outer end, and a thickened head 132 thickened at the outer end of the tooth body 131, the thickened head 132 can reduce the irritation of the head of the type A fixed blade tooth 13a to the skin; the type B fixed blade tooth 13b includes a tooth body 131 having one end of the root connected to the skin-attaching sheet 11, and a retaining edge 133 bent downward from the outer end of the tooth body 131 below the tooth body 131, and the end of the retaining edge 133 is provided with a connecting edge 14 connecting the multiple retaining edges 133 in this row.

[0044] like Figures 7 to 12 The double-toothed fixed blade structure of a reciprocating razor shown in the figure includes the double-toothed fixed blade 1 of the reciprocating razor and a fixed frame 2 for fixing the fixed blade 1, the fixed frame 2 being provided with a concave air avoidance groove 21 on the left and / or right side, the air avoidance groove 21 corresponding to the tooth body of multiple A-type fixed blade teeth 13a and the tooth body and retaining edge of the B-type fixed blade teeth 13b. The A-type fixed blade teeth 13a are suspended in the air, and the connecting edge 14 of the B-type fixed blade teeth 13b is connected to the fixed frame 2 and defines the retaining edge 133, and the corresponding tooth body 131 is supported from the bottom by the retaining edge 133. An active chamber 20 for the movable blade 3 to move therein is provided between the fixed blade 1 and the fixed frame 2, and a notch 130 is formed at the bottom of the A-type fixed blade teeth 13a between two adjacent B-type fixed blade teeth 13b, spanning from one hair feed groove 12 to another hair feed groove 12. The notch 130 is relatively large, which is conducive to cleaning and falling out of hair in the active chamber 20. Since multiple B-type fixed blade teeth 13b are separated by the A-type fixed blade teeth 13a, and only the bottom of the B-type fixed blade teeth 13b has the retaining edges 133, the spacing between the retaining edges 133 is relatively wide and the arrangement density of the retaining edges 133 is relatively low. When the skin-contacting sheet 11 is moved against the skin to shave long hair, the gaps 130 between the retaining edges 133 can reduce the obstruction to the hair, which is conducive to the hair entering the hair inlet groove 12 on both sides of the A-type fixed blade teeth 13a. The hair blocked by the B-type fixed blade teeth 13b, when pressed crooked by the retaining edges 133, is easily deflected to both sides to enter the gaps 130, and then further enter the hair inlet groove 12, which can effectively prevent the hair from being pressed crooked and unable to enter the hair inlet groove, thereby improving the hair feeding efficiency.

[0045] The avoidance groove 21 corresponds to the tooth body and retaining edge of the plurality of A-type fixed blade teeth 13a and the tooth body and retaining edge of the B-type fixed blade teeth 13b. Since it is not blocked by the fixed frame 2, the movable blade teeth 31 can be closer to the heads of the A-type fixed blade teeth 13a and the B-type fixed blade teeth 13b. Figure 11 and Figure 12 As shown, the cutting portion is moved closer to the left and right edges, thereby improving cutting performance.

[0046] The A-type fixed blade teeth 13a and the B-type fixed blade teeth 13b are arranged in a staggered manner. Preferably, an A-type fixed blade tooth 13a is provided between two adjacent B-type fixed blade teeth 13b. Figures 1 to 3 Of course, more than two A-type fixed blade teeth 13a may be provided between two adjacent B-type fixed blade teeth 13b, which is omitted in the figure.

[0047] Preferably, the width of the A-type fixed blade tooth 13a and the B-type fixed blade tooth 13b is less than 0.50 mm, and the A-type fixed blade tooth 13a located at the position of the notch 130 is a slender tooth. Since the notch 130 is large, the width of the maintaining edge 133 as the spacing strip between two adjacent notches 130 is small, and the hair can easily enter the notch 130. At the same time, the A-type fixed blade tooth 13a can easily be inserted into the hair to comb the hair, so that the hair can better enter the hair inlet groove 12 on both sides of the A-type fixed blade tooth 13a for cutting.

[0048] The B-type fixed blade teeth 13b are composed of two pieces of material, a tooth body 131 and a retaining edge 133, which are formed at a certain angle. They are connected to the fixed frame 2 through a connecting edge 14 and limit the retaining edge 133, and have good strength. The A-type fixed blade teeth 13a are arranged between the B-type fixed blade teeth 13b. The B-type fixed blade teeth 13b can protect the A-type fixed blade teeth 13a and can, to a certain extent, prevent the A-type fixed blade teeth from being deformed and damaged by collision. The retaining edge 133 forms an outer cover that can protect the movable blade teeth of the movable knife on the inside.

[0049] Preferably, the heads of the A-type fixed blade teeth 13a in the same row are located on the inner side of the heads of the B-type fixed blade teeth 13b. The B-type fixed blade teeth 13b are used to protect the A-type fixed blade teeth 13a from collision and deformation. Moreover, the heads of the B-type fixed blade teeth 13b protrude outward relative to the heads of the A-type fixed blade teeth 13a, thereby forming a concave-convex fixed blade tooth head structure between the heads of the A-type fixed blade teeth 13a and the B-type fixed blade teeth 13b, which is more conducive to combing the hair into the hair feed groove 12.

[0050] Preferably, if Figure 1 、 Figure 2 、 Figure 6b 、 Figure 9 and Figure 10As shown, the B-type fixed blade tooth 13b is provided with a recessed portion 134 on its head that is recessed upward from the retaining edge 133. The recessed portion 134 enables the B-type fixed blade tooth 13b to form a thinned flat head 135 on the head, which is convenient for inserting into the hair to comb and hook the hair. In order to make the head of the B-type fixed blade tooth 13b more rounded and improve the comfort when scraping on the skin, as shown in FIG. Figure 3 、 Figure 6c 、 Figure 6d and Figure 8 As shown, the flat head 135 is formed into a smooth head 136 by laser melting part of the material of the flat head 135 or coating the flat head 135 with material. Alternatively, Figure 6a On the basis of the B-type fixed blade tooth 13b shown, a rounded head 136 is formed at its head by laser melting part of the material or the coating material. The coating material can be coated with plastic or metal.

[0051] The coating material may be formed by a coating process such as dipping, spraying or spin coating, or by electroplating, chemical deposition or the like.

[0052] Regarding the structure of the thickening head 132 of the A-type fixed blade tooth 13a:

[0053] like Figure 5a As shown, a bent short piece 137 bent downward from the outer end of the tooth body 131 is provided below the tooth body 131 of the A-type fixed blade tooth 13a, and the bent short piece 137 is superimposed on the outer end of the tooth body 131 to form a thickened head 132 at the outer end of the tooth body 131; further, a covering material 138 is provided on the thickened head 132 to prevent hair from getting stuck in the gap between the bent short piece 137 and the tooth body 131, and to make the head of the A-type fixed blade tooth 13a smoother, thereby reducing irritation to the skin caused by the head of the A-type fixed blade tooth 13a during use.

[0054] Or, as Figure 5c As shown, the A-type fixed blade tooth 13a is formed with a thickened head 132 by directly providing a coating material 138 on the outer end of the tooth body 131;

[0055] Or, as Figure 5d As shown, the outer end of the tooth body 131 of the A-type fixed blade tooth 13a is formed with a thickened head 132 by laser melting part of the material of the tooth body 131; preferably, as shown Figure 5eAs shown, the tooth body 131 of the A-type fixed blade tooth 13a is provided with a bent short piece 137 bent downward from the outer end of the tooth body 131 below its outer end. The bent short piece 137 and the outer end of the tooth body 131 are laser melted together to form a thickened head 132. The bent short piece 137 increases the material when the outer end of the tooth body 131 is laser melted, so that the thickened head 132 has a certain volume to facilitate the formation of a smooth ball head. The ball head can be a round ball head, an elliptical ball head, a flat ball head or a bullet head shape, or other shapes with a curved outer surface.

[0056] like Figures 7 to 12 In the illustrated reciprocating razor, a movable blade 3 capable of reciprocating back and forth within a movable chamber 130 is disposed at the bottom of the double-toothed fixed blade 1. A pressing member 4 is disposed below the movable blade 3 for pressing the movable blade 3 upward so that the movable blade teeth 31 abut against the bottom surface of the tooth body 131. The movable blade 3 is provided with movable blade teeth 31 that cooperate with the tooth body 131 to cut hair. A movable blade transmission device is connected to the movable blade 3 for reciprocating back and forth relative to the fixed blade 1. During shaving, the movable blade transmission device is connected to an external drive device, driving the movable blade 3 to reciprocate back and forth relative to the fixed blade 1. The movable blade teeth 31 cooperate with the tooth bodies of the A-type fixed blade teeth 13a and the B-type fixed blade teeth 13b to cut hair.

[0057] A method for manufacturing the double-toothed fixed blade structure of the reciprocating shaver, the method comprising the following steps:

[0058] A fixing frame 2 is provided, and a concave air-avoiding groove 21 is formed by removing material from the left side and / or right side of the fixing frame 2;

[0059] Manufacturing a double-toothed fixed knife 1: providing a metal sheet, removing material from the metal sheet to form two types of teeth, short teeth 1a and long teeth 1b, on the outside of the metal sheet, and forming a skin-contacting piece 11 on the inside of the metal sheet, the long teeth 1b and the short teeth 1a are arranged in rows on the left and / or right sides of the skin-contacting piece 11 and are arranged alternately, the roots of the long teeth 1b and the short teeth 1a are connected to the skin-contacting piece 11, the outer end of the short teeth 1a is a free end, the outer end of the long teeth 1b is located outside the outer end of the short teeth 1a, and multiple long teeth 1b in the same row are connected together at the outer ends by a connecting edge 14, and the multiple long teeth 1b connected with the connecting edge 14 are connected together from the middle of the long teeth 1b. Bend downward to form a B-type fixed blade tooth 13b, the B-type fixed blade tooth 13b includes a tooth body 131 located at the top and a retaining edge 133 located below the tooth body 131. The outer end of the short tooth piece 1a is thickened to form an A-type fixed blade tooth 13a. The A-type fixed blade tooth 13a includes a tooth body 131 with one end of the root connected to the skin-contacting sheet 11 and a free end at the outer end, and a thickened head 132 thickened at the outer end of the tooth body 131. The tooth bodies of the A-type fixed blade tooth 13a and the B-type fixed blade tooth 13b are flush, and the outer end of the thickened head 132 is flush with the tooth tip of the B-type fixed blade tooth 13b or located on the inner side of the tooth tip of the B-type fixed blade tooth 13b. Fixed blade mounting portions 15 are provided at both ends of the skin-contacting sheet 11;

[0060] The double-toothed fixed blade 1 is mounted on the fixed frame 2, wherein the clearance groove 21 corresponds to the clearance of the tooth bodies of multiple A-type fixed blade teeth 13a and the tooth bodies and retaining edges of the B-type fixed blade teeth 13b. The connecting edge 14 is located outside the clearance groove 21 and is connected and defined on the fixed frame 2. The fixed blade mounting parts 15 at both ends are laser welded to the two ends of the fixed frame 2 and define the skin-adhering sheet 11 from both ends. The connection method of the connecting edge 14 to the fixed frame 2 is as follows: Figures 9 to 12 In the embodiment shown, the connecting edge 14 is fixed to the fixing frame 2 by laser welding; or Figure 13 As shown, the outer end of the connecting edge 14 is bent downward to form a hook 139, and the fixing frame 2 is provided with a groove for inserting the connecting hook downward. The fixed knife is installed on the fixing frame 2 from top to bottom, and the hook presses downward on the fixing frame 2, and causes the metal sheet composed of the retaining edge 133 and the connecting edge 14 to produce a certain elastic deformation upward, so that the metal sheet composed of the retaining edge 133 and the connecting edge 14 is tightened between the fixing frame 2 and the tooth body 131. The connecting edge 14 is limited on the fixing frame 2, and the production process is simple.

[0061] In order to make the outer end of the thickening head 132 located inside the tooth tip of the B-type fixed blade tooth 13b, as shown in FIG. Figure 5a 、 5b As shown in FIG5c, when the tooth body 131 of the A-type fixed blade tooth 13a is provided with a bent short piece 137 bent downward from the outer end of the tooth body 131, when bending, as shown in FIG5c, Figure 4As shown, the bending position S1 of the short tooth piece 1a is located inside the bending position S2 of the long tooth piece 1b; alternatively, when the outer end of the tooth body 131 of the A-type fixed blade tooth 13a is formed with a thickened head 132 by laser melting part of the material of the tooth body 131, the generated thickened head 132 is located inside the tooth tip of the B-type fixed blade tooth 13b by laser melting a certain length of the tooth body 131.

[0062] The method is simple in process, and the prepared double-tooth fixed knife structure has high feeding efficiency and good structural strength.

Claims

1. A double-toothed fixed blade (1) of a reciprocating shaver, made of a metal sheet, characterized in that: The invention comprises a skin-adhering sheet (11) located at the top and used for adhering to the skin when shaving hair, wherein a plurality of fixed blade teeth arranged in a row are provided on the left side and / or the right side of the skin-adhering sheet (11), and a hair feeding groove (12) is provided between two adjacent fixed blade teeth, and the fixed blade teeth in the same row include staggered A-type fixed blade teeth (13a) and B-type fixed blade teeth (13b), wherein the A-type fixed blade teeth (13a) include a root end connected to the skin-adhering sheet (11) and an outer end being a free end. The B-type fixed blade tooth (13b) comprises a tooth body (131) having one end at its root connected to the skin-contacting sheet (11), and a retaining edge (133) bent downward from the outer end of the tooth body (131) below the tooth body (131), and a connecting edge (14) connecting the plurality of retaining edges (133) in the row is provided at the end of the retaining edge (133).

2. The double-toothed fixed blade (1) of a reciprocating shaver according to claim 1, characterized in that: The B-type fixed blade tooth (13b) is provided with a recessed portion (134) recessed upward from the retaining edge (133) at its head, and the recessed portion (134) enables the B-type fixed blade tooth (13b) to form a thinned flat head (135) at the head.

3. The double-toothed fixed blade (1) of a reciprocating shaver according to claim 2, characterized in that: The flat head (135) is formed into a rounded head (136) by laser melting a part of the material of the flat head (135) or coating the flat head (135) with material.

4. The double-toothed fixed blade (1) of a reciprocating shaver according to claim 1, characterized in that: The B-shaped fixed blade tooth (13b) is formed with a smooth head (136) at its head by laser melting a part of the material or coating the material.

5. A double-toothed fixed blade (1) for a reciprocating shaver according to any one of claims 1 to 4, characterized in that: A bent short piece (137) bent downward from the outer end of the tooth body (131) is provided below the tooth body (131) of the A-type fixed blade tooth (13a); the bent short piece (137) is superimposed on the outer end of the tooth body (131) to form a thickened head (132) at the outer end of the tooth body (131).

6. The double-toothed fixed blade (1) of a reciprocating shaver according to claim 5, characterized in that: The thickening head (132) is provided with a coating material (138).

7. A double-toothed fixed blade (1) for a reciprocating shaver according to any one of claims 1 to 4, characterized in that: The outer end of the tooth body (131) of the A-type fixed blade tooth (13a) is formed with a thickened head (132) by laser melting part of the material of the tooth body (131) or coating the outer end of the tooth body (131) with material.

8. A double-toothed fixed blade (1) for a reciprocating shaver according to any one of claims 1 to 4, characterized in that: The heads of the A-type fixed blade teeth (13a) in the same row are located inside the heads of the B-type fixed blade teeth (13b).

9. A double-toothed fixed blade structure for a reciprocating shaver, characterized in that: A double-toothed fixed blade (1) of a reciprocating razor according to any one of claims 1 to 8, and a fixing frame (2) for fixing the fixed blade (1), wherein the fixing frame (2) is provided with a concave avoidance groove (21) on the left and / or right side, and the avoidance groove (21) corresponds to the avoidance of the tooth bodies of multiple A-type fixed blade teeth (13a) and the tooth bodies and retaining edges of the B-type fixed blade teeth (13b), the A-type fixed blade teeth (13a) are suspended in the air, and the connecting edges of the B-type fixed blade teeth (13b) are connected. The connecting edge (14) is connected to the fixed frame (2) and defines the retaining edge (133), and the corresponding tooth body (131) is supported from below by the retaining edge (133). A movable cavity (20) for the movable knife (3) to move therein is provided between the fixed knife (1) and the fixed frame (2), and a notch (130) spanning from one feed groove (12) to another feed groove (12) is formed at the bottom of the A-type fixed knife tooth (13a) between two adjacent B-type fixed knife teeth (13b).

10. A method for manufacturing the double-toothed fixed blade structure of a reciprocating shaver according to claim 9, the method comprising the following steps: Providing a fixing frame (2), removing material on the left side and / or right side of the fixing frame (2) to form an inwardly concave air-avoiding groove (21); Manufacturing a double-toothed fixed knife (1): providing a metal sheet, removing material from the metal sheet to form two types of teeth, short teeth (1a) and long teeth (1b), on the outer side of the metal sheet, and forming a skin-contacting piece (11) on the inner side of the metal sheet, wherein the long teeth (1b) and the short teeth (1a) are arranged in a row on the left and / or right side of the skin-contacting piece (11) and are arranged alternately, the roots of the long teeth (1b) and the short teeth (1a) are connected to the skin-contacting piece (11), the outer end of the short teeth (1a) is a free end, the outer end of the long teeth (1b) is located outside the outer end of the short teeth (1a), and a plurality of long teeth (1b) in the same row are connected together at the outer end by a connecting edge (14), and the plurality of long teeth (1b) connected with the connecting edge (14) are moved together from the middle of the long teeth (1b) to the skin-contacting piece (11). Bending downward to form a B-type fixed knife tooth (13b), the B-type fixed knife tooth (13b) includes a tooth body (131) located at the upper part and a retaining edge (133) located below the tooth body (131), and the outer end of the short tooth piece (1a) is thickened to form an A-type fixed knife tooth (13a), the A-type fixed knife tooth (13a) includes a tooth body (131) with one end of the root connected to the skin-contacting piece (11) and the outer end being a free end, and a thickening head (132) thickened at the outer end of the tooth body (131), the tooth bodies of the A-type fixed knife tooth (13a) and the B-type fixed knife tooth (13b) are flush, the outer end of the thickening head (132) is flush with the tooth tip of the B-type fixed knife tooth (13b) or is located on the inner side of the tooth tip of the B-type fixed knife tooth (13b), and fixed knife mounting parts (15) are provided at both ends of the skin-contacting piece (11); The double-toothed fixed knife (1) is mounted on a fixed frame (2), wherein the clearance groove (21) corresponds to the clearance of the tooth bodies of a plurality of A-type fixed knife teeth (13a) and the tooth bodies and retaining edges of the B-type fixed knife teeth (13b), the connecting edge (14) is located outside the clearance groove (21) and is connected and defined on the fixed frame (2), and the fixed knife mounting parts (15) at both ends are respectively fixed to the two ends of the fixed frame (2) and define the skin-contacting sheet (11) from both ends.

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