Method for manufacturing fixed knife with ball head, fixed knife and reciprocating razor with the fixed knife

Abstract

The present invention discloses a method for manufacturing a fixed blade with a ball head. The method has the advantages of simple production process, convenient formation of a smooth ball head at the tooth tip, reduction of irritation of the tooth tip of the fixed blade teeth to the skin, and provision of a smoother and more comfortable skin feel. The present invention also discloses a fixed blade of a reciprocating razor with a ball head, comprising a fixed blade located at the top, the fixed blade being provided with a plurality of fixed blade teeth arranged in rows, a hair feeding groove being provided between two adjacent fixed blade teeth, a plurality of the fixed blade teeth comprising a tooth body, and an enlarged ball head formed by melting a portion of the material of the fixed blade teeth at a bending position where the outer end of the tooth body is bent downward, the ball head having a smooth surface. When shaving, the fixed blade teeth scrape the skin with the ball head as the head, which can reduce the irritation of the tooth tip of the fixed blade teeth to the skin. The present invention also discloses a reciprocating razor with a simple structure and comfortable use.

Description

Technical field

[0001] The present invention relates to a method for manufacturing a fixed blade with a ball head, and also relates to a fixed blade of a reciprocating razor with a ball head. The present invention also relates to a reciprocating razor. [Background Technology]

[0002] To ensure a clean, short hair root after shaving, current reciprocating razors typically use a very thin fixed blade. The structure typically consists of fixed cutting teeth on a fixed blade and dynamic cutting teeth on a movable blade. The dynamic cutting teeth reciprocate and cooperate with the fixed cutting teeth to cut hair. The fixed cutting teeth are typically supported from below by a support structure on the fixed blade support. The dynamic cutting teeth need to be positioned a certain distance inboard of the support structure to avoid it during movement. Therefore, to ensure a certain amount of overlap between the fixed and dynamic cutting teeth, the fixed cutting teeth are relatively long, thin, and slender, requiring structural strength provided by the support structure.

[0003] As disclosed in the patent CN204954880U, the structure comprises at least one toothed front edge formed by a first wall portion and a second wall portion. The first wall portion is the fixed cutting teeth mentioned above, and the second wall portion is the supporting structure. Since the width and spacing of the fixed cutting teeth are relatively small, when a supporting structure is made for each fixed cutting tooth, the structure and production process are very complicated, the production precision requirements are high, the production is difficult, and the manufacturing cost is high.

[0004] Furthermore, the excessively thin tips of the fixed cutting teeth can irritate the skin, affecting the feel. Besides the teeth, other factors that affect the feel include the horizontal protective elements on both ends of the fixed blade, which typically cover the ends. This creates a raised step that makes it less smooth when moving across the skin, affecting the feel and also impacting the cutting performance of the cutting teeth near the horizontal protective elements.

[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 manufacturing method for a fixed knife with a ball head, which has a simple production process and can easily form a smooth ball head at the tooth tip, thereby reducing the irritation of the tooth tip of the fixed knife teeth to the skin and providing a smoother and more comfortable skin feel.

[0007] In order to solve the above technical problems, the present invention provides a manufacturing method for a fixed knife with a ball head, the manufacturing method comprising: removing material from a metal sheet to form a plurality of tooth slices on the outer side of the metal sheet, and forming a fixed blade on the inner side of the metal sheet, the roots of the tooth slices are connected to the fixed blade, the tooth slices are bent to form fixed knife tooth embryos, and hair feeding grooves are formed between adjacent fixed knife tooth embryos, the fixed knife tooth embryos include a tooth body at the top for contacting the skin and a folded piece folded at the bottom of the outer end of the tooth body, the folded piece and the outer end of the tooth body constitute a folding head of the fixed knife tooth embryo, and the folding heads of several fixed knife tooth embryos are melted and cooled to condense into ball heads.

[0008] According to the method for manufacturing a fixed blade with a ball head, the teeth are arranged in a row on the left side and / or the right side of the fixed blade.

[0009] According to the method for manufacturing a fixed knife with a ball head as described above, the outer sides of the plurality of tooth pieces in the same row are provided with connecting edges for connecting the plurality of tooth pieces from the outer ends; in the process of bending the tooth pieces, the plurality of tooth pieces connected by the connecting edges are bent together from the middle of the tooth pieces to form a tooth body located at the upper part, a folding piece located at the bottom of the tooth body, and a retaining edge extending along the folding piece and connected to the connecting edge; the formed fixed knife tooth blank includes the tooth body, the folding piece and the retaining edge; the folding head of the fixed knife tooth blank is melted to form a ball head, the connecting edge is used to connect to the fixing frame, and the retaining edge supports the tooth body from below; or

[0010] Among the several tooth pieces in the same row, some of the tooth pieces are long tooth pieces, and some of the tooth pieces are short tooth pieces, the long tooth pieces and the short tooth pieces are arranged alternately, the outer ends of the short tooth pieces are free ends, the outer ends of the short tooth pieces are partially folded to form folded pieces located at the bottom of the outer ends of the tooth bodies, the fixed blade tooth embryos formed by bending the short tooth pieces are composed of the tooth bodies and the folded pieces, and the folded heads of the fixed blade tooth embryos formed by bending the short tooth pieces are melted to form ball heads; the outer sides of the long tooth pieces are provided with connecting edges for connecting the multiple long tooth pieces from the outer ends, and the long tooth pieces are connected During the tooth piece bending process, a plurality of long tooth pieces connected by connecting edges are bent together from the middle of the long tooth pieces to form a tooth body at the upper part, a folded piece at the bottom of the tooth body, and a retaining edge extending along the folded piece and connected to the connecting edge. The fixed blade tooth blank formed by the bending of the long tooth pieces consists of the tooth body, the folded piece and the retaining edge. The folded head of the fixed blade tooth blank formed by the bending of the long tooth pieces is melted to form a ball head or retained without melting. The connecting edge is used to connect to the fixing frame, and the retaining edge supports the tooth body from below; or

[0011] The outer ends of the plurality of tooth pieces in the same row are free ends, and the outer end portions of the tooth pieces are folded to form folded pieces located at the outer end bottom of the tooth body, and the formed folded heads are melted to form ball heads.

[0012] According to the manufacturing method of a fixed knife with a ball head as described above, when some of the tooth plates in the same row are long tooth plates and some are short tooth plates, the bending position of the short tooth plates is located inside the bending position of the long tooth plates, or the bending position of the short tooth plates is the same as the bending position of the long tooth plates, but only the folding heads corresponding to the short tooth plates are melted to form ball heads, and the heads of the fixed knife teeth corresponding to the short tooth plates are located inside the heads of the fixed knife teeth corresponding to the long tooth plates.

[0013] In the manufacturing method of a fixed knife with a ball head as described above, the folding head is melted and solidified by laser to form the ball head, and the center line L1 of the ball head is located below the center line L2 of the tooth body.

[0014] Another technical problem to be solved by the present invention is to provide a fixed blade of a reciprocating shaver with a ball head, which has the characteristics of simple structure and comfortable skin feel when used.

[0015] To solve the above technical problems, the present invention provides a fixed blade of a reciprocating razor with a ball head, comprising a fixed blade located at the top, a plurality of fixed blade teeth arranged in rows on the left and / or right sides of the fixed blade, a hair feeding groove being provided between two adjacent fixed blade teeth, and several of the fixed blade teeth comprising a tooth body and an enlarged ball head formed by melting the material of a portion of the fixed blade teeth at a downwardly bent position at the outer end of the tooth body.

[0016] As described above, the fixed blade of a reciprocating razor with a ball head has a downward-facing edge integrally formed on both the front and rear ends of the fixed blade, and the edge smoothly transitions to the top of the fixed blade. The edge at each end includes a left edge, an end edge, and a right edge, and the left edge, end edge, and right edge are connected to form a U shape.

[0017] The fixed blade of a reciprocating razor with a ball head as described above, wherein the fixed blade teeth are A-type fixed blade teeth and / or B-type fixed blade teeth, wherein one end of the root of the tooth body of the A-type fixed blade tooth is connected to the fixed blade, and the outer end is a free end, and the A-type fixed blade tooth is provided with a ball head at the bend position of the outer end of the tooth body; the B-type fixed blade tooth is provided with one end of the root of the tooth body connected to the fixed blade, and a retaining edge is provided below the tooth body and is bent downward from the outer end of the tooth body;

[0018] The plurality of fixed blade teeth in the same row are all A-type fixed blade teeth; or

[0019] The plurality of fixed blade teeth in the same row are all B-type fixed blade teeth, each of which is provided with a ball head at the outer end bend position of the tooth body, the retaining edge is located on the inner side of the ball head, and the end of the retaining edge is provided with a connecting edge, and the connecting edge is connected to the plurality of retaining edges corresponding to the tooth body in the row; or

[0020] The fixed blade teeth in the same row are staggered A-type fixed blade teeth and B-type fixed blade teeth, wherein the end of the retaining edge of the B-type fixed blade teeth is provided with a connecting edge, and the connecting edge is connected to the corresponding multiple retaining edges on the B-type fixed blade teeth in the row. The B-type fixed blade teeth have a ball head at the bending position of the outer end of the tooth body, or the B-type fixed blade teeth retain the head formed by the bending without generating a ball head.

[0021] In the above-mentioned fixed blade of a reciprocating shaver with a ball head, when the fixed blade teeth in the same row are staggered A-type fixed blade teeth and B-type fixed blade teeth, the heads of the A-type fixed blade teeth are located inside the heads of the B-type fixed blade teeth.

[0022] As described above, in a reciprocating razor with a ball head, when the multiple fixed blade teeth in the same row are all A-type fixed blade teeth, between two adjacent hair feed grooves, the groove depth D1 of one hair feed groove is smaller than the groove depth D2 of the other hair feed groove, the difference in the groove depths of the two adjacent hair feed grooves is between 0.1 mm and 0.5 mm, and a smooth transition chamfer is provided between the bottom of the hair feed groove and the side of the tooth body.

[0023] Another technical problem to be solved by the present invention is to provide a reciprocating shaver which has the characteristics of simple structure and comfortable use.

[0024] In order to solve the above technical problems, the present invention provides a reciprocating razor with a fixed blade of the above-mentioned reciprocating razor with a ball head, which also includes a fixing frame for fixing the fixed blade, a movable blade is provided at the bottom of the fixed blade, and movable blade teeth are provided on the movable blade. A pressing member is provided below the movable blade for pressing the movable blade upward so that the movable blade teeth are attached to the bottom surface of the tooth body, and a movable blade transmission device is connected to the movable blade for causing the movable blade to reciprocate back and forth relative to the fixed blade.

[0025] In the reciprocating shaver as described above, the fixed frame is provided with a concave escape groove or a plurality of support arms corresponding to the tooth body on the left and / or right side.

[0026] When setting up the air avoidance groove on the fixed frame:

[0027] The plurality of fixed blade teeth in the same row are all A-type fixed blade teeth, and the clearance grooves correspond to the plurality of tooth bodies to allow the plurality of A-type fixed blade teeth to be suspended in the air; or

[0028] The plurality of fixed blade teeth in the same row are all B-type fixed blade teeth, the clearance grooves correspond to the plurality of tooth bodies to provide clearance below the plurality of tooth bodies and inside the corresponding retaining edges, the connecting edge is connected to the fixing frame to limit the retaining edge, and the retaining edge supports the tooth body from the inside of the ball head; or

[0029] The fixed blade teeth in the same row are staggered A-type fixed blade teeth and B-type fixed blade teeth, and the avoidance grooves correspond to avoid the tooth bodies of multiple A-type fixed blade teeth and the tooth bodies and retaining edges of the B-type fixed blade teeth. The A-type fixed blade teeth are suspended in the air, and the connecting edges of the B-type fixed blade teeth are connected to the fixing frame to limit the retaining edges, and the retaining edges support the corresponding tooth bodies from the inner side of the ball head;

[0030] When a plurality of support arms corresponding to the tooth body are provided on the fixed frame, the ball head is located on the outside of the support arm, and the support arm is supported on the bottom of the tooth body from the inside of the ball head. The plurality of fixed blade teeth in the same row are all B-type fixed blade teeth, the retaining edge is attached to the outside of the support arm, and the connecting edge is connected and fixed to the fixed frame; alternatively, the plurality of fixed blade teeth in the same row are all A-type fixed blade teeth, and the support arm is welded and fixed to the ball head.

[0031] In the reciprocating razor as described above, when the fixed blade is integrally formed with downwardly directed edges on the front and rear ends, the front and rear ends of the fixing frame are respectively provided with inwardly concave mounting grooves for the edges on the two ends of the fixed blade to be inserted into, and the edges are fixed in the mounting grooves.

[0032] The reciprocating razor as described above has concave mounting grooves arranged from top to bottom around the outer edges of both ends of the fixing frame, the mounting grooves forming a step on both ends of the fixing frame to cooperate with the edging, the outer side surfaces at both ends of the fixing frame are aligned or substantially aligned with the outer side surfaces at both ends of the fixed blade, and the top surface of the fixed blade and the outer side surface of the edging serve as contact surfaces with the skin during shaving; or

[0033] The fixing frame is made of plastic material, and is provided with a surrounding edge located outside the edge wrapping to fix the edge wrapping, and the surrounding edge smoothly transitions to the outer surface of the fixed knife.

[0034] In the reciprocating shaver as described above, the pressing member is made of plastic and is integrally formed on the fixing frame; or

[0035] The pressing member is made of a metal sheet and includes a spring base and elastic arms arranged on the left and right sides of the spring base. When the multiple fixed blade teeth in the same row are all A-type fixed blade teeth, the spring base presses upward on the movable blade. Sliding grooves are provided on the left and right sides of the fixing frame. The elastic arms extend from the bottom into the sliding grooves and elastically press downward on the inner wall of the sliding grooves. The pressing member moves with the movable blade.

[0036] Compared with the prior art, the present invention has the following advantages:

[0037] 1. The manufacturing method of the fixed knife of the present invention is simple and can conveniently form an enlarged ball head at the tooth tip of the fixed knife teeth. The surface of the ball head is smooth. When shaving, the fixed knife teeth use the ball head as the head to scrape the skin, which can reduce the irritation of the tooth tip of the fixed knife teeth to the skin and provide a smooth skin feel.

[0038] 2. The present invention sets the outer end of the tooth body as a free end, and sets a concave avoidance groove on the side of the fixed frame to avoid multiple tooth bodies, so that the fixed blade teeth are a cantilever structure composed of the tooth body and the ball head. The thin fixed blade teeth are conducive to combing and hooking long hair into the hair inlet groove for cutting, and the ball head makes the tooth tip of the thin fixed blade teeth have a better skin feel. Because the bottom of the fixed blade teeth is avoided, and there is no supporting structure to block the bottom, the movable blade teeth can extend outward better, so that the cutting point is closer to the outer end, improving the shaving effect. The outward extension of the cutting position can correspondingly shorten the length of the fixed blade teeth and improve the strength of the fixed blade teeth, which is also conducive to using thinner materials to make the fixed blade teeth of the cantilever structure, improving the cleanliness of shaving. In addition, the reciprocating razor uses the fixed blade teeth of the cantilever structure, which can avoid the need for a support structure for each fixed blade tooth, simplifying the structure of the reciprocating razor, reducing the production accuracy and production process requirements, and facilitating manufacturing promotion and large-scale production, thereby reducing manufacturing costs.

[0039] 3. For the fixed blade teeth with cantilever structure, the depth of the groove is different. On the basis of ensuring the cutting performance, it is beneficial to shorten the length of the tooth body, so that the position line L where the tooth body is easily broken and deformed is a slant line. The length of the slant line is greater than the width of the tooth body, and the slant line is not perpendicular to the length direction of the tooth body. It can effectively enhance the structural strength and deformation resistance of the tooth body, thereby facilitating the use of thinner metal sheets to make the fixed blade.

[0040] 4. The fixed knife of the present invention has a retaining edge bent downward from the outer end of the tooth body below the tooth body. The fixed knife teeth support the outer end of the tooth body from below through the retaining edge. The fixed knife teeth have good structural strength, and the thickness of the fixed knife can be made thinner, such as a material thickness of 0.08 mm, so that the hair is shaved more cleanly; and an inwardly concave avoidance groove is provided on the side of the fixed frame to avoid the tooth body and the corresponding retaining edge. There is no need to provide a one-to-one corresponding support structure for the fixed knife teeth on the fixed frame, which simplifies the structure of the reciprocating razor, reduces the production precision and production process requirements, is conducive to manufacturing promotion and large-scale production, and reduces manufacturing costs. In addition, the movable knife teeth can extend outward better, so that the cutting point is closer to the outer end, thereby improving the shaving performance.

[0041] 5. The fixed blade teeth in the same row of the present invention are staggered A-type fixed blade teeth and B-type fixed blade teeth. A gap is formed at the bottom of the A-type fixed blade teeth between two adjacent B-type fixed blade teeth, spanning from one hair feed groove to another hair feed groove. The gap is relatively large relative to the hair feed groove, which is conducive to cleaning and removing the hair inside. Since multiple B-type fixed blade teeth are separated by the A-type fixed blade teeth, and only the bottom of the B-type fixed blade teeth has a retaining edge, the retaining edge spacing is wide and the arrangement density of the retaining edges is low. When the fixed blade moves close to the skin to shave long hair, the hair is not easily cut off. When shaving hair, the gaps between the retaining edges can reduce the obstruction to the hair, and the hair blocked by the B-type fixed blade teeth is easy to deviate to both sides and enter the gaps when it is pressed crooked by the retaining edges. Moreover, the A-type fixed blade teeth located at the gap position are slender teeth, and the hair is easy to enter the gaps. At the same time, the A-type fixed blade teeth are easy to insert into the hair to comb the hair, so that the hair can better enter the hair feeding grooves on both sides of the A-type fixed blade teeth for cutting, thereby improving the hair feeding and shaving efficiency, and can effectively prevent the hair from being pressed crooked and pressed and unable to enter the hair feeding grooves.

[0042] 6. The fixed blade of the present invention is provided with downwardly directed edges at the front and rear ends of the fixed blade. The edges are used to be mounted and fixed on a fixed frame, thereby providing better strength support. The downwardly directed U-shaped edges are conducive to forming a side surface on the reciprocating razor that smoothly transitions to the top surface of the fixed blade for contacting the skin, thereby improving the skin feel of the reciprocating razor when it moves against the skin.

Brief Description of the Drawings

[0043] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings, wherein:

[0044] Figure 1 1 is a bottom view of an embodiment of a reciprocating razor according to the present invention having a fixed blade with fixed blade teeth whose outer ends are free ends;

[0045] Figure 2 yes Figure 1 A front view of the fixed knife in the embodiment;

[0046] Figure 3 It is along Figure 2 Cross-sectional view in CC direction;

[0047] Figure 4a It is a schematic diagram of forming a plurality of teeth with free ends on the metal sheet by removing the material from the metal sheet;

[0048] Figure 4b yes Figure 4a A schematic structural diagram of an embodiment in which the distal end of the middle tooth piece is folded downward and folded back onto the bottom of the tooth body;

[0049] Figure 4c and Figure 4d yes Figure 4b Schematic diagram of the structure of the folding head melting and condensing into a spherical head;

[0050] Figure 5 yes Figure 4a A schematic structural diagram of another embodiment in which the distal end of the middle tooth piece is folded downward and folded back onto the bottom of the tooth body;

[0051] Figure 6 It is a reference diagram of the position line of the tooth body that is prone to breakage and deformation at the same groove depth;

[0052] Figure 7 It is a reference diagram of the position lines of the teeth that are prone to breakage and deformation at different groove depths;

[0053] Figure 8 It is an application Figure 1 An exploded view of an embodiment of a reciprocating razor with a fixed blade;

[0054] Figure 9 It is an application Figure 1 A schematic structural diagram of an embodiment of a reciprocating shaver with a fixed blade in which the outer side surfaces at both ends of the fixing frame are aligned or substantially aligned with the outer side surfaces at both ends of the fixed blade;

[0055] Figure 10 yes Figure 9 A bottom view of an embodiment of the present invention;

[0056] Figure 11 yes Figure 9 A cross-sectional view of the reciprocating shaver of the embodiment in the front-to-back direction;

[0057] Figure 12 yes Figure 9 A cross-sectional view of the reciprocating shaver of the embodiment in the left-right direction;

[0058] Figure 13 It is a structural schematic diagram of an embodiment in which the fixing frame has a surrounding edge to fix the edge from the outside;

[0059] Figure 14 This is a structural diagram of an embodiment in which the top pressing member and the fixing frame are integrally formed;

[0060] Figure 15 yes Figure 14 A cross-sectional view of an embodiment in the left and right directions;

[0061] Figure 16 yes Figure 15 Cross-sectional view in DD direction;

[0062] Figure 17 yes Figure 16 A partial enlarged view of point E in the middle;

[0063] Figure 18 This is a schematic diagram of the structure after the edge is inserted into the installation groove and before the edge is heated and pressurized;

[0064] Figure 19 This is a structural diagram of an embodiment in which the edge is fixed in the installation groove by gluing;

[0065] Figure 20a It is a schematic diagram of the metal sheet cutout for making a tooth piece with a connecting edge;

[0066] Figure 20b This is a schematic structural diagram of an embodiment in which the tooth piece is folded downward from the middle, and the folded piece is relatively kept concave toward the tooth body so that the folded head forms a flat head;

[0067] Figure 20c yes Figure 20b Schematic diagram of the structure of the folding head melting and condensing into a spherical head;

[0068] Figure 20d This is a schematic structural diagram of an embodiment in which the tooth piece is folded downward from the middle, and the folded piece is aligned with the retaining edge;

[0069] Figure 21 1 is a schematic structural diagram of an embodiment of a fixed knife with a retaining edge;

[0070] Figure 22 This is a schematic structural diagram of an embodiment of a reciprocating razor in which the fixed blade has a retaining edge and the fixed frame has air-avoiding grooves on the left and right sides;

[0071] Figure 23a yes Figure 22 A cross-sectional view of the embodiment taken along the fixed blade teeth;

[0072] Figure 23b yes Figure 22 A cross-sectional view of the embodiment taken along the feed groove;

[0073] Figure 24 It is a structural schematic diagram of an embodiment of a reciprocating shaver in which the fixed blade teeth have retaining edges and the fixed frame has support arms on the left and right sides;

[0074] Figure 25 This is a schematic structural diagram of an embodiment of a reciprocating shaver in which the fixed blade teeth do not have retaining edges and the fixed frame has support arms on the left and right sides;

[0075] Figure 26a and Figure 26b yes Figure 25 A schematic diagram of the structure of the fixing process between the tooth body and the support arm;

[0076] Figure 27 1 is a schematic structural diagram of another embodiment of a reciprocating razor having a fixed blade with suspended fixed blade teeth according to the present invention;

[0077] Figure 28 It is a schematic diagram of the structure of a fixed blade used in a rotary shaver;

[0078] Figure 29 Schematic diagram of two types of teeth, short and long, formed on a metal sheet by metal sheet cutout;

[0079] Figure 30 This is a structural schematic diagram of an embodiment in which the fixed blade teeth in the same row on the fixed blade are staggered A-type fixed blade teeth and B-type fixed blade teeth, and the B-type fixed blade teeth are provided with ball heads;

[0080] Figure 31 yes Figure 30 A top view of the fixed knife in FIG;

[0081] Figure 32 It includes Figure 30 A schematic structural diagram of a reciprocating razor with a fixed blade;

[0082] Figure 33 The present invention is a structural diagram of an embodiment in which the fixed blade teeth in the same row on the fixed blade are staggered A-type fixed blade teeth and B-type fixed blade teeth, and the B-type fixed blade teeth have no ball heads. [Specific implementation method]

[0083] The present invention will be further described below in conjunction with the accompanying drawings:

[0084] A method for manufacturing a fixed knife with a ball head, the manufacturing method comprising: removing material from a metal sheet to form a plurality of tooth pieces 101 on the outer side of the metal sheet, and forming a fixed blade 11 on the inner side of the metal sheet, the roots of the tooth pieces 101 being connected to the fixed blade 11, bending the tooth pieces 101 to form fixed knife tooth blanks 102, forming hair feeding grooves 15 between adjacent fixed knife tooth blanks 102, the fixed knife tooth blanks 102 including a tooth body 131 at the top for contacting the skin and a folded piece 132 folded at the bottom of the outer end of the tooth body 131, the folded piece 132 and the outer end of the tooth body 131 forming a folded head 133 of the fixed knife tooth blank 102, and melting and cooling the folded heads 133 of several fixed knife tooth blanks 102 respectively to condense into ball heads 134, and the ball heads 134 are enlarged from the outer end of the tooth body 131.

[0085] The thickness of the metal sheet used is T≤0.20mm to improve the cleanliness of shaving.

[0086] The manufacturing method is simple, such as Figures 1 to 3 、 Figures 8 to 10 、 Figures 12 to 15 、 Figures 21 to 28 、 Figures 30 to 33As shown, the manufactured fixed blade 1 can conveniently form an enlarged ball head 134 at the outer end of the tooth body 131. The enlargement here can refer to the ball head 134 being thicker relative to the outer end of the tooth body 131, or it can refer to the ball head 134 being both thicker and wider relative to the outer end of the tooth body 131. The smooth surface of the ball head 134 can reduce irritation of the tooth tips of the fixed blade teeth on the skin, providing a smooth skin feel.

[0087] The ball head 134 may be in the shape of a spherical head, an elliptical spherical head, an oblate spherical head or a bullet head, or may be in other shapes with a curved outer surface.

[0088] Preferably, the folding head 133 is melted and solidified by laser to form a ball head 134. The ball head 134 after laser treatment can be further polished to make the surface smoother. Since the folding head 133 is formed by folding the material at the bottom of the outer end of the tooth body 131, the folding head 133 is melted and solidified quickly by laser, so the center line L1 of the ball head 134 is located below the center line L2 of the tooth body 131, especially the center line L1 is located near the bottom surface of the tooth body 131, as shown in FIG. Figure 4c 、 Figure 4d and Figure 20c The laser-processed ball head 134 is offset toward the bottom of the tooth body 131, only slightly higher than the top of the tooth body 131. When shaving, the top surface of the tooth body 131 moves against the skin, and the ball head 134 can move against the skin. This provides smooth contact and reduces skin irritation, while also preventing the ball head 134 from lifting the tooth body 131 from the skin, allowing the tooth body 131 to better adhere to the skin to cut hair, thereby improving the cleanliness of the shave.

[0089] Regarding the structure of the folding head 133, as shown in FIG. Figure 4b and Figure 20b In the embodiment shown, the folded piece 132 is basically against the outer bottom of the tooth body 131; or Figure 5 and Figure 20d In the illustrated embodiment, the folded piece 132 and the bottom of the tooth body 131 have an open angle, which is preferably less than 45°.

[0090] like Figures 1 to 3 、 Figure 21 、 Figure 22 、 Figure 27 、 Figure 30 In the embodiment of the fixed blade 1 shown, the teeth 101 are arranged in a row on the left and / or right side of the fixed blade 11. The fixed blade is used in a reciprocating shaver to cooperate with the reciprocating movable blade to cut hair. The fixed blade 11 is a curved arc-shaped piece, such as Figure 12 and Figure 23a and Figure 23b As shown; of course, the fixed blade 11 can also be a flat structure, which is omitted in the figure.

[0091] Of course, you can also Figure 28 In the embodiment of the fixed blade shown, the plurality of teeth 131 on the fixed blade 11 are arranged around a circumference. The fixed blade is used in a rotary shaver to cooperate with a rotating movable blade to cut hair.

[0092] like Figure 4a As shown in the first structural mode of the tooth piece 101, the outer ends of the plurality of tooth pieces 101 in the same row are free ends. The free end means that the end has no defined structure and the other end is fixed. The outer end portion of the tooth piece 101 is folded along the fold line S1 on the inner side of the end to form a folded piece 132 located at the bottom of the outer end of the tooth body 131. The position of the fold line S1 shown here is only used as a reference for the bend close to the outer end of the tooth piece 101. Its position can be adjusted according to actual needs. The formed folded head 133 is melted to form a ball head 134. Figures 1 to 3 、 Figures 8 to 15 As shown, the formed fixed blade teeth are A-type fixed blade teeth 13a. The enlarged ball head 134 prevents the thin fixed blade teeth from piercing the skin. The fixed blade teeth are slender in structure, which makes it easy to insert into longer body hair to comb and hook the body hair into the hair feeding groove for cutting.

[0093] The outer end of the tooth piece 101 is a free end structure. When forming the ball head 134, the following two methods can be used:

[0094] The first method: Figure 4b As shown, the tooth body 131 is suspended in the air, and the ball head is directly melted and condensed by laser 7 at the folding head 133; Figure 1 and Figure 4c As shown, when forming the ball head 134, the folded sheet 132 may be partially retained at the inner end without being melted to ensure that sufficient molten material condenses out of the ball head; of course, it may also be as shown in FIG. Figure 4d As shown, the folded sheet 132 is completely melted to form a ball head;

[0095] The second method: Figure 26a As shown, the fixed knife with the folded folding piece 132 is first installed on the fixing frame 2, and the fixing frame 2 is used to install the fixed knife and form a space for the movable knife to move with the fixed knife. The fixing frame 2 is provided with a plurality of support arms 26 corresponding to the plurality of tooth bodies 131. The support arms 26 are supported on the bottom of the tooth body 131 and are located on the inner side of the folding piece 132, and the outer side of the support arm 26 is attached to or close to the folding piece 132. The folding head 133 is melted by the laser 7 and welded to the support arm 26 when the ball head 134 is formed. The inner side of the ball head 134 is bonded to the support arm 26, as shown in FIG. Figure 25 and Figure 26b shown.

[0096] like Figure 20aAs shown in the second structural mode of the tooth piece 101, the outer sides of the multiple tooth pieces 101 in the same row are provided with a connecting edge 14 for connecting the multiple tooth pieces 101 from the outer ends. In the process of bending the tooth piece 101, the multiple tooth pieces 101 connected by the connecting edge 14 are bent together from the middle of the tooth piece 101 along the folding line S2 to form a tooth body 131 at the upper part, a folding piece 132 at the bottom of the tooth body 131, and a retaining edge 135 extending along the folding piece 132 and connected to the connecting edge 14. The position of the folding line S2 shown here is only a reference for bending in the middle area, and does not refer to the center position between the two ends of the tooth piece. Its position can be adjusted according to actual needs. The fixed knife tooth blank 102 formed includes the tooth body 131, the folding piece 132 and the retaining edge 135. Figure 20b and Figure 20d As shown, the folded head 133 of the fixed blade tooth blank 102 is melted to form a ball head 134, as shown in FIG. Figure 20c As shown, the connecting edge 14 is used to connect with the fixing frame 2, and the retaining edge 135 supports the tooth body 131 from below. Figures 21 to 24 As shown, the fixed blade teeth have good structural strength, which is conducive to the use of thinner metal sheets. Preferably, the thickness of the metal sheet used is T≤0.10mm, such as a metal sheet with T=0.08mm.

[0097] The downwardly bent portion of the tooth piece 101 forms two parts: a folding piece 132 and a retaining edge 135. Figure 20b In the embodiment shown, the folding piece 132 is recessed relative to the retaining edge 135 toward the tooth body 131 and the folding head 133 forms the flat head of the fixed blade tooth blank 102. After the ball head 134 is formed, the ball head 134 is obviously convex on the fixed blade tooth to form the flat head of the fixed blade tooth. Figure 20c As shown, it is easy to pick up the hair. Or, as Figure 20d In the embodiment shown, the folding piece 132 is aligned with the retaining edge 135, so the structure is simple and easy to bend and form.

[0098] like Figure 29 As shown in the third structural mode of the tooth piece 101, among the plurality of tooth pieces 101 in the same row, some of the tooth pieces 101 are long tooth pieces 101b, and some of the tooth pieces 101 are short tooth pieces 101a. The long tooth pieces 101b and the short tooth pieces 101a are arranged alternately, and the outer ends of the short tooth pieces 101a are free ends. The outer ends of the short tooth pieces 101a are partially folded to form a folded piece 132 located at the bottom of the outer end of the tooth body 131, as shown in FIG. Figure 4b and Figure 5 As shown, the fixed blade tooth blank 102 formed by bending the short tooth piece 101a is composed of a tooth body 131 and a folded piece 132. The folded head 133 of the fixed blade tooth blank 102 formed by bending the short tooth piece 101a is melted to form a ball head 134. Figure 4c 、 Figure 4d 、 Figures 30 to 33 As shown; the outer side of the long tooth piece 101b is provided with a connecting edge 14 that connects multiple long tooth pieces 101b from the outer end. In the process of bending the long tooth piece 101b, the multiple long tooth pieces 101b connected by the connecting edge 14 are bent together from the middle of the long tooth piece 101b to form a tooth body 131 at the upper part, a folding piece 132 at the bottom of the tooth body 131, and a retaining edge 135 extending along the folding piece 132 and connected to the connecting edge 14, as shown Figure 20b and Figure 20d As shown, the fixed blade tooth blank 102 formed by bending the long tooth piece 101b is composed of a tooth body 131, a folding piece 132 and a retaining edge 135. Figures 30 to 32 As shown, the folded head 133 of the fixed blade tooth blank 102 formed by bending the long tooth piece 101b is melted to form a ball head 134, or as shown in FIG. Figure 33 As shown, the folding head 133 of the fixed blade tooth blank 102 formed by bending the long tooth piece 101b is retained without being melted, the connecting edge 14 is used to connect with the fixing frame 2, and the retaining edge 135 is used to support the tooth body 131 from below;

[0099] The fixed blade teeth corresponding to the short tooth pieces 101a are A-type fixed blade teeth 13a, and the fixed blade teeth corresponding to the long tooth pieces 101b are B-type fixed blade teeth 13b. The A-type fixed blade teeth 13a and the B-type fixed blade teeth 13b are arranged alternately.

[0100] Preferably, the bending position S3 of the short tooth piece 101a is located inside the bending position S4 of the long tooth piece 101b, so that the head of the fixed knife tooth 13 corresponding to the short tooth piece 101a is located inside the head of the fixed knife tooth 13 corresponding to the long tooth piece 101b; or the bending position S3 of the short tooth piece 101a is the same as the bending position S4 of the long tooth piece 101b, and the bending process is simple, but only the folding head 133 corresponding to the short tooth piece 101a is melted to form a ball head 134, and the fixed knife tooth corresponding to the short tooth piece 101a is shortened by melting the material, so that the head of the fixed knife tooth corresponding to the short tooth piece 101a is located inside the head of the fixed knife tooth 13 corresponding to the long tooth piece 101b, and the production process is simple.

[0101] like Figures 1 to 3 、 Figure 21 and Figure 30In the illustrated embodiment, preferably, downwardly directed edges 12 are respectively stretched and formed on the front and rear ends of the fixed blade 11, and the edges 12 on each end respectively include a left edge 121, an end edge 122, and a right edge 123. The left edge 121, the end edge 122, and the right edge 123 are connected to form a U-shape, and the edges 12 smoothly transition to the top of the fixed blade 11. The U-shaped edges 12 are used to be mounted and fixed on the fixed frame 2, and can form a better strength support, while the downwardly directed U-shaped edges 12 are conducive to forming a side surface on the fixed blade that smoothly transitions to the top surface of the fixed blade 11, which is used to contact the skin and improve the skin feel of the reciprocating razor when it moves against the skin.

[0102] Embodiment of reciprocating razor:

[0103] like Figures 8 to 19 、 Figures 21 to 26b 、 Figures 32 to 33 The reciprocating razor shown includes a fixed knife 1 and a fixing frame 2 for fixing the fixed knife 1. A movable knife 3 is provided at the bottom of the fixed knife 1, and movable knife teeth 31 are provided on the movable knife 3. A pressing member 4 is provided below the movable knife 3 for pressing the movable knife 3 upward so that the movable knife teeth 31 are attached to the bottom surface of the tooth body 131 to improve the sharpness of the shearing. The movable knife 3 is connected to a movable knife transmission device for causing the movable knife 3 to reciprocate relative to the fixed knife 1.

[0104] As an embodiment of the movable knife transmission device, the movable knife transmission device includes a movable knife bracket 5 fixedly connected to the movable knife 3, the fixed frame 2 is provided with a guide groove 22 for sliding forward and backward with the movable knife bracket 5, and the bottom of the movable knife bracket 5 is connected to a transmission joint 6 for connecting to an external transmission device.

[0105] When the connection portion between the fixing frame 2 and the fixed knife is a metal bracket, the fixed knife 1 and the fixing frame 2 are preferably fixed by welding, and of course other fixing methods can also be used.

[0106] like Figures 1 to 3 、 Figure 21 、 Figure 22 、 Figure 25 、 Figure 30 and Figure 33 As shown, the fixed knife of the reciprocating shaver with a ball head, the fixed knife 1 includes a fixed blade 11 located at the top, and a plurality of fixed knife teeth 13 arranged in rows are provided on the left and / or right side of the fixed blade 11, and a hair feeding groove 15 is provided between two adjacent fixed knife teeth 13, and some of the fixed knife teeth 13 include a tooth body 131, and an enlarged ball head 134 formed by melting part of the material of the fixed knife tooth 13 at the bending position where the outer end of the tooth body 131 is bent downward.

[0107] The fixed blade tooth 13 may be an A-type fixed blade tooth 13a, a B-type fixed blade tooth 13b, or a combination of the A-type fixed blade tooth 13a and the B-type fixed blade tooth 13b. The A-type fixed blade tooth 13a has a tooth body 131 at one end at the root thereof connected to the fixed blade 11, and the outer end thereof is a free end. The A-type fixed blade tooth 13a has a ball head 134 at the bent position of the outer end of the tooth body 131. The B-type fixed blade tooth 13b has a tooth body 131 at one end at the root thereof connected to the fixed blade 11, and a retaining edge 135 is provided below the tooth body 131 and bent downward from the outer end thereof.

[0108] like Figure 1 、 Figure 2 、 Figures 8 and 9 In the embodiment shown, the plurality of fixed blade teeth 13 in the same row are all A-type fixed blade teeth 13a;

[0109] Or, as Figure 21 and Figure 22 In the illustrated embodiment, the plurality of fixed blade teeth 13 in the same row are all B-type fixed blade teeth 13b. The B-type fixed blade teeth 13b are provided with a ball head 134 at the outer end bend position of the tooth body 131. The retaining edge 135 is located on the inner side of the ball head 134. The end of the retaining edge 135 is provided with a connecting edge 14, and the connecting edge 14 is connected to the plurality of retaining edges 135 corresponding to the tooth body 131 in the row.

[0110] Or, as Figures 30 to 33 In the illustrated embodiment, the same row of fixed blade teeth 13 is composed of staggered A-type fixed blade teeth 13a and B-type fixed blade teeth 13b, wherein the end of the retaining edge 135 of the B-type fixed blade tooth 13b is provided with a connecting edge 14, and the connecting edge 14 is connected to the corresponding multiple retaining edges 135 on the row of B-type fixed blade teeth 13b. The B-type fixed blade tooth 13b has a ball head 134 generated at the outer end bending position of the tooth body 131, or the B-type fixed blade tooth 13b retains the head formed by the bending without generating the ball head 134.

[0111] Preferably, the width of the fixed blade teeth is less than 0.50 mm, so that more fixed blade teeth and hair feeding grooves can be arranged in a limited space, and the fixed blade teeth can be refined.

[0112] Regarding the installation structure of the fixed blade teeth, there are the following implementation methods:

[0113] Example 1:

[0114] like Figures 1 to 15In the illustrated embodiment, the fixing frame 2 is provided with a concave avoidance groove 25 on the left and / or right side. The plurality of fixed blade teeth 13 on the same row corresponding to the avoidance groove 25 are all A-type fixed blade teeth 13a. The avoidance groove 25 corresponds to a plurality of tooth bodies 131 to allow the plurality of A-type fixed blade teeth 13a to be suspended in the air. The fixed blade teeth are cantilever structures with one end fixed and the other end suspended in the air. The thin fixed blade teeth 13 facilitate combing and hooking long hair into the hair feed groove 15 for cutting. The ball head 134 ensures that the tooth tips of the thin fixed blade teeth 13 have a better skin feel.

[0115] Since there is no space below the fixed blade teeth 13, the movable blade teeth 31 can extend outward better, so that the cutting point is closer to the outer end, thereby improving the shaving effect. The outward extension of the cutting position can correspondingly shorten the length of the fixed blade teeth 13, thereby improving the strength of the fixed blade teeth 13, thereby facilitating the use of thinner materials to manufacture the cantilevered fixed blade teeth 13, thereby improving the cleanliness of shaving.

[0116] The tooth body 131 and the bottom of the movable teeth 31 of the reciprocating shaver are exposed, which is convenient for cleaning.

[0117] In addition, the reciprocating shaver adopts a cantilever structure of the fixed blade teeth 13, which can avoid the need for a supporting structure for each fixed blade tooth, simplify the structure of the reciprocating shaver, reduce the production precision and production process requirements, thereby facilitating manufacturing promotion and large-scale production, and reducing manufacturing costs;

[0118] like Figure 6 As shown, the tooth body with the same groove depth is close to the root of the tooth body, and its width is close to the width of the tooth body at that location, and is basically perpendicular to the length direction of the tooth body. As a preferred structure, Figure 1 and Figure 2 As shown, between two adjacent feed grooves 15, the groove depth D1 of one feed groove 15 is less than the groove depth D2 of the other feed groove 15, and the difference in the groove depths of the two adjacent feed grooves 15 is between 0.1mm and 0.5mm, and there is a smooth transition chamfer R between the bottom of the feed groove 15 and the side of the tooth body 131, as shown in FIG. Figure 7 As shown, the tooth body with different groove depths is conducive to shortening the length of the tooth body 131 while ensuring the cutting performance, and makes the position L of the tooth body 131 which is easy to break and deform tilted and lengthened, and the position line L is not perpendicular to the length direction of the tooth body, which can effectively enhance the structural strength and deformation resistance of the tooth body 131, thereby facilitating the use of thinner metal sheets to make fixed knives.

[0119] Example 2:

[0120] like Figures 20c to 23bAs shown, the fixing frame 2 is provided with a concave avoidance groove 25 on the left and / or right side, and the multiple fixed blade teeth 13 in the same row corresponding to the avoidance groove 25 are all B-type fixed blade teeth 13b, and the avoidance groove 25 corresponds to a plurality of tooth bodies 131 to provide space for the bottom of the multiple tooth bodies 131 and the inner side of the corresponding retaining edge 135. The connecting edge 14 is connected to the fixing frame 2 to define the retaining edge 135. The connection between the connecting edge 14 and the fixing frame 2 can be a fixed connection or other connection. The retaining edge 135 supports the tooth body 131 from the inner side of the ball head 134; the fixed blade tooth 13 supports the outer end of the tooth body 131 from the bottom through the retaining edge 135. The fixed blade tooth has good structural strength, and the thickness of the fixed blade can be made thinner, such as a material thickness of 0.08 mm, so that the hair is shaved more cleanly;

[0121] The ball head 134 at the head of the fixed teeth 13 facilitates combing and lifting long hair into the hair inlet groove 15 for cutting, and also ensures a better feel when the fixed teeth scrape against the skin. Furthermore, the lower part of the multiple teeth 131 and the inner side of the corresponding retaining edges 135 are free of air, allowing the movable teeth 31 to extend outward more effectively, bringing the cutting point closer to the outer end and improving shaving performance.

[0122] In addition, the reciprocating shaver does not need to be provided with a supporting structure corresponding to the fixed blade teeth 13 on the fixed frame 2. The retaining edge 135 is formed by bending the tooth piece and fixed to the fixed frame 2 by connecting the edge 14 to fix the retaining edge 135. The retaining edge 135 can provide strength support, simplify the structure of the reciprocating shaver, reduce the production accuracy and production process requirements, facilitate manufacturing promotion and large-scale production, and reduce manufacturing costs.

[0123] Example 3:

[0124] like Figure 24 As shown, a plurality of support arms 26 corresponding to the tooth body 131 are provided on the left and / or right sides of the fixing frame 2, and the plurality of fixed blade teeth 13 in the same row are all B-type fixed blade teeth 13b, the ball head 134 is located on the outside of the support arm 26, and the support arm 26 is supported on the bottom of the tooth body 131 from the inside of the ball head 134, and the retaining edge 135 is attached to the outside of the support arm 26, and the connecting edge 14 is connected and fixed to the fixing frame 2. Preferably, the portion of the fixing frame 2 used for connecting to the connecting edge 14 is made of metal, and the connecting edge 14 is fixed to the fixing frame 2 by welding;

[0125] During production and assembly, the ball head 134 is first formed, such as Figure 20c As shown, the fixed knife is then mounted on the fixing frame 2, the retaining edge 135 and the connecting edge 14 are attached to the outer side of the fixing frame 2, and the connecting edge 14 is welded and fixed to the fixing frame 2;

[0126] The fixed blade tooth 13 supports the outer end of the tooth body 131 from below through the support arm 26, and has strong structural strength; the ball head 134 protrudes outward relative to the support arm 26 to form a flat head, which is conducive to combing and hooking long hair into the hair feed groove 15 for cutting.

[0127] Example 4:

[0128] like Figures 25 to 26b As shown, the difference between the fourth embodiment and the third embodiment is that the multiple fixed blade teeth 13 on the same row are all A-type fixed blade teeth 13a, there is no retaining edge 135 and connecting edge 14 below the tooth body 131, and the support arm 26 is welded to the ball head 134. Figure 26a As shown, the fixed knife with the folded folding piece 132 is first installed on the fixed frame 2. The support arm 26 is made of metal material. The support arm 26 is correspondingly attached to the bottom of the tooth body 131 and is attached to or close to the folding piece 132. Then, the folding head 133 is laser melted and welded to the support arm 26 when forming the ball head 134. The inner side of the ball head 134 is bonded to the support arm 26. Figure 26b The fixed blade 13 is supported from below by the support arm 26 on the outer end of the tooth body 131, which has a strong structural strength; the ball head 134 is located on the outer side of the support arm 26 to form a flat head protruding outward, which is conducive to combing and hooking long hair into the hair feeding groove 15 for cutting.

[0129] Embodiment 5:

[0130] like Figures 30 to 33 As shown, the fixing frame 2 is provided with a concave avoidance groove 25 on the left and / or right side. The fixed blade teeth 13 in the same row corresponding to the avoidance groove 25 are staggered A-type fixed blade teeth 13a and B-type fixed blade teeth 13b. The avoidance groove 25 corresponds to avoiding 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 edge 14 of the B-type fixed blade teeth 13b is connected to the fixing frame 2 to define the retaining edge 135, and its retaining edge 135 supports the corresponding tooth body 131 from the inner side of the ball head 134;

[0131] Between two adjacent B-type fixed blade teeth, a gap 130 is formed at the bottom of the A-type fixed blade teeth, spanning from one hair feed groove to another. The gap 130 is relatively large relative to the hair feed groove, which is conducive to cleaning and removing the hair inside. Since multiple B-type fixed blade teeth are separated by the A-type fixed blade teeth, and only the bottom of the B-type fixed blade teeth has a retaining edge, the retaining edge spacing is wide and the arrangement density of the retaining edges is low. When the fixed blade 11 moves close to the skin to shave long hair, the gaps 130 between the retaining edges can reduce the resistance to the hair. The hair blocked by the B-type fixed blade teeth is easily deflected to both sides and enters the notch 130 when it is pressed and distorted by the retaining edge. Moreover, the A-type fixed blade teeth 13a located at the position of the notch 130 are slender teeth, which makes it easy for the hair to enter the notch 130. At the same time, the A-type fixed blade teeth 13a are easily inserted into the hair to comb the hair, so that the hair can better enter the hair feeding grooves 12 on both sides of the A-type fixed blade teeth 13a for cutting, thereby improving the hair feeding and shaving efficiency and effectively preventing the hair from being pressed and depressed and unable to enter the hair feeding grooves.

[0132] The avoidance groove corresponds to the tooth body and retaining edge of the plurality of A-type fixed blade teeth and the tooth body of the B-type fixed blade teeth. 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 32 As shown, the cutting portion is brought closer to the left and right edges, thereby improving cutting performance;

[0133] 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, such as Figures 30 to 33 Of course, more than two A-type fixed blade teeth 13a may be provided between two adjacent B-type fixed blade teeth 13b, but the illustration is omitted here.

[0134] The B-type fixed blade teeth 13b are composed of two pieces of material, the tooth body and the retaining edge, which are formed at a certain angle. They are connected to the fixed frame 2 through the connecting edge and limit the retaining edge, which has 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 the retaining edge forms an outer cover, which can protect the movable blade teeth of the movable blade on the inside.

[0135] 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.

[0136] A preferred structure of the fixed knife 1 is as follows: Figure 1 、 Figures 8 to 19 、 Figure 21 、 Figures 30 to 33 In the embodiment shown, downward-facing edging 12 is integrally formed on the front and rear ends of the fixed blade 11, and the edging 12 smoothly transitions to the top of the fixed blade 11. The edging 12 at each end includes a left edging 121, an end edging 122 and a right edging 123, respectively. The left edging 121, the end edging 122 and the right edging 123 are connected to form a U shape.

[0137] For matching mounting brackets, such as Figure 32 In the embodiment shown, the edging 12 can be fixed on the outer sides of the two ends of the fixing frame; or concave mounting grooves 21 for the edging 12 on the two ends of the fixed knife 1 to be inserted into can be provided on the front and rear ends of the fixing frame 2, and the edging 12 can be fixed in the mounting grooves 21.

[0138] like Figures 8 to 12 In the embodiment shown, a mounting groove 21 is formed by being concave from top to bottom around the outer edges of both ends of the fixing frame 2. The mounting groove 21 forms a step on both ends of the fixing frame 2 to cooperate with the edging 12. The outer side surfaces at both ends of the fixing frame 2 are aligned or basically aligned with the outer side surfaces at both ends of the fixed knife 1. The top surface of the fixed knife 1 and the outer side surface of the edging 12 serve as contact surfaces that contact the skin during shaving, forming a smooth transition outer contour that contacts the skin. Combined with the ball head 134, the fixed knife teeth contact the skin more smoothly. When each ball head 134 is pressed on the skin and moves, it also has the effect of combing and massaging the skin, effectively improving the skin feel and comfort of shaving.

[0139] As an embodiment of the fixing frame, Figure 8 、 Figure 11 and Figure 12 In the illustrated embodiment, the fixing frame 2 is formed by fixing a metal frame 201 and a plastic frame 202 . The metal frame is used to install the fixed knife 1 , and the edge 12 is fixed to the installation slot 21 by welding, gluing or buckling.

[0140] As another embodiment of the fixing frame, Figures 14 to 19 In the illustrated embodiment, the fixing frame 2 is made of plastic material, and the mounting groove 21 is located on the inner side of the outer edges of both ends of the fixing frame 2. The mounting groove 21 is a U-shaped groove with an upward opening. The fixing frame 2 is provided with a surrounding edge 24 located on the outer side of the edge 12 to fix the edge 12. The surrounding edge 24 smoothly transitions with the outer surface of the fixed blade 1 and serves as a side wall of the mounting groove 21.

[0141] Preferably, if Figure 18As shown, after the edge 12 is inserted into the mounting groove 21, the edge 24 is heated and pressurized to deform the edge 24 and adhere to the edge 12, and the edge 24 and the outer surface of the fixed knife 1 are smoothly transitioned, as shown in FIG. Figure 17 As shown, the contact surface with the skin during shaving is smoother, effectively improving the skin feel and comfort of shaving. Preferably, the edge 12 is provided with a side hole 121, and after heating and pressurizing, part of the material of the edge 24 is squeezed into the side hole 121, preventing the edge 12 from escaping from the mounting groove 21. Moreover, after heating and pressurizing, the transition position between the edge 24 and the fixed blade 1 is located at the bend chamfer of the edge 12 and the fixed blade 11. One can prevent the edge 12 from escaping from the mounting groove 21, and the other can also ensure a smoother transition between the top and side surfaces of the reciprocating shaver that contact the skin.

[0142] Of course, if Figure 19 As shown, the edge 12 can also be glued and fixed in the installation groove 21 by glue, and the production process is simple.

[0143] As an embodiment of the pressing member 4 , the pressing member 4 is made of a metal sheet, and includes a spring base 41 and spring arms 42 provided on the left and right sides of the spring base 41 . The metal pressing member 4 has stable elastic force.

[0144] like Figures 8 to 12 In the embodiment shown, when the plurality of fixed blade teeth 13 in the same row are all A-type fixed blade teeth 13a, the spring base 41 presses upward on the movable blade 3, and the left and right sides of the fixing frame 2 are provided with sliding grooves 23. The elastic arms 42 extend from below into the sliding grooves 23 and elastically press downward on the inner wall of the sliding grooves 23, and the pressing member 4 moves together with the movable blade 3. Figure 8 As shown, a mounting hole 43 is provided in the middle of the spring base 41 for the movable knife bracket 5 to pass through. The movable knife bracket 5 cooperates with the mounting hole 43 and moves with the top pressure piece 4 during movement. The part of the structure where the sliding groove 23 contacts the elastic arm 42 is made of plastic material to reduce the noise generated during the reciprocating motion.

[0145] like Figures 23a to 26b In the illustrated embodiment, the spring base 41 is mounted and fixed on the fixing frame 2 , and the spring arm 42 presses upward on the bottom of the movable knife 3 .

[0146] As another embodiment of the top pressure member 4, Figure 14 and Figure 15 As shown, the pressing member 4 is made of plastic and is integrally formed on the fixing frame 2, thereby reducing the number of parts of the reciprocating shaver, simplifying the structure, reducing the assembly process, and lowering the manufacturing cost.

Claims

1. A method for manufacturing a fixed blade with a ball head, the method comprising: A plurality of tooth pieces (101) are formed on the outer side of the metal sheet by removing material from the metal sheet, and a fixed blade (11) is formed on the inner side of the metal sheet, the root of the tooth piece (101) is connected to the fixed blade (11), the tooth piece (101) is bent to form a fixed blade tooth embryo (102), and a hair feeding groove (15) is formed between adjacent fixed blade tooth embryos (102), the fixed blade tooth embryo (102) includes a tooth body (131) at the top for contacting the skin and a folding piece (132) folded at the bottom of the outer end of the tooth body (131), the folding piece (132) and the outer end of the tooth body (131) form a folding head (133) of the fixed blade tooth embryo (102), the folding heads (133) of the plurality of fixed blade tooth embryos (102) are melted and cooled to condense into ball heads (134), and the tooth pieces (101) are arranged in a row on the left and / or right side of the fixed blade (11); Among the plurality of tooth pieces (101) in the same row, some of the tooth pieces (101) are long tooth pieces (101b), and some of the tooth pieces (101) are short tooth pieces (101a), the long tooth pieces (101b) and the short tooth pieces (101a) are arranged alternately, the outer ends of the short tooth pieces (101a) are free ends, and the outer ends of the short tooth pieces (101a) are partially folded to form a folded piece (132) located at the bottom of the outer end of the tooth body (131), and the short tooth pieces (101 a) The fixed blade tooth embryo (102) formed by bending is composed of a tooth body (131) and a folding piece (132); the folding head (133) of the fixed blade tooth embryo (102) formed by bending the short tooth piece (101a) is melted to form a ball head (134); the outer side of the long tooth piece (101b) is provided with a connecting edge (14) for connecting multiple long tooth pieces (101b) from the outer end; during the process of bending the long tooth piece (101b), the multiple long tooth pieces (101b) connected by the connecting edge (14) are connected to each other. The long tooth pieces (101b) are bent together from the middle of the long tooth piece (101b) to form a tooth body (131) at the upper part, a folding piece (132) at the bottom of the tooth body (131), and a retaining edge (135) extending along the folding piece (132) and connected to the connecting edge (14). The fixed blade tooth embryo (102) formed by bending the long tooth piece (101b) consists of the tooth body (131), the folding piece (132) and the retaining edge (135). The folded head (133) of the fixed blade tooth embryo (102) formed by bending the piece (101b) is melted to form a ball head (134) or retained without being melted, the connecting edge (14) is used to connect with the fixed frame (2), and the retaining edge (135) supports the tooth body (131) from below, wherein the fixed blade tooth formed corresponding to the short tooth piece (101a) is an A-type fixed blade tooth (13a), and the fixed blade tooth formed corresponding to the long tooth piece (101b) is a B-type fixed blade tooth (13b).

2. The method for manufacturing a fixed knife with a ball head according to claim 1, characterized in that: The bending position (S3) of the short tooth piece (101a) is located inside the bending position (S4) of the long tooth piece (101b), or the bending position (S3) of the short tooth piece (101a) is the same as the bending position (S4) of the long tooth piece (101b), but only the folding head (133) corresponding to the short tooth piece (101a) is melted to form a ball head (134), and the head of the fixed tooth corresponding to the short tooth piece (101a) is located inside the head of the fixed tooth corresponding to the long tooth piece (101b).

3. The method for manufacturing a fixed knife with a ball head according to claim 1, characterized in that: The folding head (133) is melted and solidified by laser to form a ball head (134), and the center line L1 of the ball head (134) is located below the center line L2 of the tooth body (131).

4. A fixed blade (1) of a reciprocating razor with a ball head, characterized in that: The invention comprises a fixed blade (11) located at the top, wherein the front and rear ends of the fixed blade (11) are respectively integrally formed with a downwardly directed edge (12), a plurality of fixed blade teeth (13) arranged in a row are provided on the left side and / or the right side of the fixed blade (11), a feed groove (15) is provided between two adjacent fixed blade teeth (13), and a plurality of the fixed blade teeth (13) comprise a tooth body (131), and an enlarged ball head (134) formed by melting a portion of the material of the fixed blade teeth (13) at a bending position where the outer end of the tooth body (131) is bent downward. The teeth (13) are divided into A-type fixed blade teeth (13a) and B-type fixed blade teeth (13b), wherein one end of the root of the tooth body (131) of the A-type fixed blade tooth (13a) is connected to the fixed blade (11), and the outer end is a free end, and the A-type fixed blade tooth (13a) is provided with a ball head (134) at the bending position of the outer end of the tooth body (131); one end of the root of the tooth body (131) of the B-type fixed blade tooth (13b) is connected to the fixed blade (11), and a retaining edge (135) bent downward from the outer end of the tooth body (131) is provided below the tooth body (131).

5. The fixed blade (1) of a reciprocating shaver with a ball head according to claim 4, characterized in that: The edge (12) transitions smoothly with the top of the fixed blade (11), and the edge (12) at each end comprises a left edge (121), an end edge (122), and a right edge (123), respectively. The left edge (121), the end edge (122), and the right edge (123) are connected to form a U shape.

6. A fixed blade (1) of a reciprocating shaver with a ball head according to claim 4 or 5, characterized in that: The plurality of fixed blade teeth (13) in the same row are all A-type fixed blade teeth (13a); or The plurality of fixed blade teeth (13) in the same row are all B-type fixed blade teeth (13b), and the B-type fixed blade teeth (13b) are provided with a ball head (134) at the outer end bending position of the tooth body (131), the retaining edge (135) is located on the inner side of the ball head (134), and the end of the retaining edge (135) is provided with a connecting edge (14), and the connecting edge (14) is connected to the plurality of retaining edges (135) corresponding to the tooth body (131) in the row; or The fixed blade teeth (13) in the same row are staggered A-type fixed blade teeth (13a) and B-type fixed blade teeth (13b), wherein the end of the retaining edge (135) of the B-type fixed blade teeth (13b) is provided with a connecting edge (14), and the connecting edge (14) is connected to the corresponding plurality of retaining edges (135) on the B-type fixed blade teeth (13b) in the row, and the B-type fixed blade teeth (13b) generate a ball head (134) at the outer end bending position of the tooth body (131), or the B-type fixed blade teeth (13b) retain the head formed by the bending without generating the ball head (134).

7. The fixed blade (1) of a reciprocating shaver with a ball head according to claim 6, characterized in that: When the fixed blade teeth (13) in the same row are staggered A-type fixed blade teeth (13a) and B-type fixed blade teeth (13b), the head of the A-type fixed blade teeth (13a) is located inside the head of the B-type fixed blade teeth (13b).

8. The fixed blade (1) of a reciprocating shaver with a ball head according to claim 6, characterized in that: The plurality of fixed blade teeth (13) in the same row are all A-type fixed blade teeth (13a), and between two adjacent feed grooves (15), the groove depth D1 of one feed groove (15) is smaller than the groove depth D2 of the other feed groove (15), and the difference in the groove depths of the two adjacent feed grooves (15) is between 0.1 mm and 0.5 mm, and a smooth transition chamfer is provided between the bottom of the feed groove (15) and the side of the tooth body (131).

9. A reciprocating shaver having a fixed blade (1) of a reciprocating shaver with a ball head according to any one of claims 6 to 8, characterized in that: The invention also includes a fixing frame (2) for fixing the fixed knife (1), a movable knife (3) is provided at the bottom of the fixed knife (1), and movable knife teeth (31) are provided on the movable knife (3). A pressing member (4) is provided below the movable knife (3) for pressing the movable knife (3) upward so that the movable knife teeth (31) are attached to the bottom surface of the tooth body (131), and a movable knife transmission device is connected to the movable knife (3) for driving the movable knife (3) to move back and forth relative to the fixed knife (1).

10. The reciprocating shaver according to claim 9, characterized in that: The fixing frame (2) is provided with a concave air-avoiding groove (25) on the left side and / or the right side. The plurality of fixed blade teeth (13) in the same row are all A-type fixed blade teeth (13a), and the clearance grooves (25) correspond to the plurality of tooth bodies (131) to allow the plurality of A-type fixed blade teeth (13a) to be suspended in the air; or, The plurality of fixed blade teeth (13) in the same row are all B-type fixed blade teeth (13b), the avoidance grooves (25) correspond to the plurality of tooth bodies (131) to provide avoidance below the plurality of tooth bodies (131) and inside the corresponding retaining edges (135), the connecting edge (14) is connected to the fixing frame (2) to limit the retaining edge (135), and the retaining edge (135) supports the tooth body (131) from the inside of the ball head (134); or, The fixed blade teeth (13) in the same row are staggered A-type fixed blade teeth (13a) and B-type fixed blade teeth (13b), and the avoidance grooves (25) correspond to the tooth bodies (131) and retaining edges (135) of multiple A-type fixed blade teeth (13a) and the tooth bodies (131) and retaining edges (135) 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 fixing frame (2) to limit the retaining edge (135), and the retaining edge (135) supports the corresponding tooth body (131) from the inner side of the ball head (134).

11. The reciprocating shaver according to claim 9, characterized in that: A plurality of support arms (26) corresponding to the tooth body (131) are provided on the left and / or right sides of the fixing frame (2), the ball head (134) is located outside the support arm (26), and the support arm (26) is supported on the bottom of the tooth body (131) from the inside of the ball head (134). The plurality of fixed blade teeth (13) in the same row are all B-type fixed blade teeth (13b), the retaining edge (135) is attached to the outer side of the support arm (26), and the connecting edge (14) is connected and fixed to the fixing frame (2); Alternatively, the plurality of fixed blade teeth (13) in the same row are all A-type fixed blade teeth (13a), and the support arm (26) and the ball head (134) are fixed by welding.

12. The reciprocating shaver according to any one of claims 9 to 11, characterized in that: When the fixed blade (11) is integrally formed with a downwardly directed edge (12) at both the front and rear ends, the fixed frame (2) is provided with a concave mounting groove (21) at both the front and rear ends for the edge (12) at both ends of the fixed blade (1) to be inserted into, and the edge (12) is fixed in the mounting groove (21).

13. The reciprocating shaver according to claim 12, characterized in that: An inwardly concave mounting groove (21) is provided from top to bottom around the outer edges of both ends of the fixing frame (2). The mounting groove (21) forms a step on both ends of the fixing frame (2) to cooperate with the edging (12). The outer side surfaces at both ends of the fixing frame (2) are aligned or substantially aligned with the outer side surfaces at both ends of the fixed blade (1). The top surface of the fixed blade (1) and the outer side surface of the edging (12) serve as contact surfaces with the skin during shaving.

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