CN212287729U

CN212287729U - Reciprocating razor head

Info

Publication number: CN212287729U
Application number: CN202020654857.6U
Authority: CN
Inventors: 吴让攀
Original assignee: Zhongshan Xiaoshi Ceramic Blade Co ltd
Current assignee: Zhongshan Xiaoshi Ceramic Blade Co ltd
Priority date: 2020-04-24
Filing date: 2020-04-24
Publication date: 2021-01-05
Anticipated expiration: 2030-04-24

Abstract

The utility model discloses a reciprocating type razor tool bit, including the stationary knife with be used for supporting and the stationary knife rest of fixed stationary knife, the stationary knife is for having pliant flexible foil, the stationary knife rest is the basin shape support, the stationary knife uses the basin mouth edge of stationary knife rest to support, the stationary knife is buckled the parcel all around downwards and is made the top surface of stationary knife and the side rounding off that is close to the top surface on the stationary knife rest basin wall outside all around, form the cutting inner chamber between stationary knife and the stationary knife rest, be equipped with the pore of advancing on the stationary knife, be equipped with the sword that moves that can relative stationary knife reciprocating motion and then cutting body hair in the cutting inner chamber, be equipped with on moving the sword and advance the corresponding cutting tooth in pore, still including passing the stationary knife rest bottom will move the transmission part that sword and power device are connected. The reciprocating razor head has smooth top surface and peripheral side surfaces to form a leather drum structure, and has the advantages of smoothness, neatness, skin adhesion, capability of cutting concave parts of a body, and good shaving comfort.

Description

Reciprocating razor head

[ technical field ] A method for producing a semiconductor device

The utility model relates to a reciprocating razor head.

[ background of the invention ]

The existing reciprocating electric shaver head, such as patent publication No. CN204954880U, named as blade set and hair cutter, and No. ZL201610889953.7, named as reciprocating electric shaver head, because of the limitation of the existing manufacturing process and its mature design concept, the knife net of the shaver head is formed by bending the sheet metal stationary knife from the left and right ends, and fixing the bent sheet metal stationary knife on the left and right sides of the stationary knife bracket by injection molding and other methods, and is designed into a linear shape with open front and back ends (the reciprocating direction of the moving knife is the front and back direction), the front and back ends are provided with ports, the moving knife and other components are respectively put in the two ports from the front and back ends, the two ports are exposed due to the edge of the stationary knife, there is a risk of skin puncture, in order to avoid skin puncture by sharp edge during hair shaving, usually, the two ends are covered with end caps to shield the edge of the knife, when the cutter head structure is used, firstly, the end cover is attached to the skin, the cutting surface is jacked up by the end cover, and most of the skin is in a curved surface shape capable of being extruded and transformed, so long as the end cover is thinned, most of the cutting surface can be well attached to the skin to cut hair, and only a small part of the cutting surface close to the end cover can be jacked up by the end cover to be positioned on the skin and cannot be effectively cut; however, for some depressed parts, such as arm sockets, the cut surface is pressed by the end caps, and thus the cut surface cannot effectively contact the skin for shaving. Moreover, the existing end cover is usually an injection molding part, and the plastic corner and the burr can scrape people, so that the existing end cover does not stab the skin like a knife edge and also brings certain discomfort.

The present invention is made based on such a situation.

[ Utility model ] content

An object of the utility model is to overcome prior art's weak point, provide a simple structure, with low costs reciprocating type razor tool bit, should reciprocating type razor tool bit will decide the upper end of knife rest and basin mouth from last down wrap up through deciding the sword and live, form the drum-in-skin structure, have slick and sly transitional cutting top surface and the side that is close to the top surface, level and smooth neatly, skin, and can once only amputate totally with the body hair.

The utility model discloses a realize through following technical scheme:

a reciprocating razor cartridge characterized by: the reciprocating type shaver is characterized by comprising a fixed knife and a fixed knife rest used for supporting and fixing the fixed knife, wherein the fixed knife is a flexible metal sheet with flexibility, the fixed knife rest is a basin-shaped support, the fixed knife uses the edge of a basin opening of the fixed knife rest as a support, the periphery of the fixed knife is downwards bent to wrap the outside of the basin wall around the fixed knife rest and enable the top surface of the fixed knife and the side surface close to the top surface to be in smooth transition, a cutting inner cavity is formed between the fixed knife and the fixed knife rest, a hole for allowing donor hairs to enter the cutting inner cavity is formed in the fixed knife, a movable knife capable of reciprocating back and forth relative to the fixed knife is arranged below the fixed knife in the cutting inner cavity and further cuts off the hairs in the hole, cutting teeth corresponding to the hole and used for cutting the hairs are arranged on the movable knife, and the reciprocating type shaver further comprises a transmission part which penetrates through the bottom of the fixed knife rest and connects.

A reciprocating razor cartridge as claimed in the above, characterized in that: and a fillet for smoothly transitionally connecting the left and right basin walls with the front and rear basin walls is arranged between the left and right basin walls and the front and rear basin walls of the fixed knife rest.

A reciprocating razor cartridge as claimed in the above, characterized in that: the fixed knife rest is provided with a hair falling hole for cutting off hair in the cutting inner cavity to fall out.

A reciprocating razor cartridge as claimed in the above, characterized in that: the fixed knife and the fixed knife rest are made of weldable metal materials, and the side surface of the fixed knife bent downwards from the periphery is welded on the peripheral basin wall of the fixed knife rest.

A reciprocating razor cartridge as claimed in the above, characterized in that: the hair inlet holes are uniformly formed in the left side and/or the right side of the fixed knife, the fixed cutting teeth are formed between every two adjacent hair inlet holes, and hair inlet grooves which correspond to the hair inlet holes and can allow hairs to enter and exit the cutting inner cavity are formed in the left basin wall and/or the right basin wall of the fixed knife rest.

A reciprocating razor cartridge as claimed in the above, characterized in that: the top surface and the left and right side surfaces of the fixed cutter form acute angles respectively, a chamfer angle in smooth transition is formed between the top surface and the left and right side surfaces, and the height D of the chamfer angle is less than 1.0 mm.

A reciprocating razor cartridge as claimed in the above, characterized in that: the left side and/or the right side enter the pore for the isthmus structure of indent from the outside to the inboard in the left-right direction, this isthmus structure is constituteed by continuous smooth curve, and from wide to narrow from the outside to the middle part, narrow widen from the middle part to the inboard again, the width of its outside entrance is L1, the width of middle part narrowest department is L2, corresponding cutting tooth is located the inboard of middle part narrowest department, the width that this isthmus structure corresponds the position of the outer edge of cutting tooth is L3, the depth that corresponds the outer edge of cutting tooth from the middle part narrowest department is L4, the depth that corresponds the outer edge of cutting tooth from the outside entrance to the outer edge of corresponding cutting tooth is L5, satisfy following relation: l1 is more than L3 is more than L2, L2 is more than or equal to 0.1mm and less than or equal to 0.3mm, L4 is more than or equal to 0.1mm and less than or equal to 1mm, and L5 is more than or equal to 1.2 mm.

A reciprocating razor cartridge as claimed in the above, characterized in that: the left and right basin walls and the front and rear basin walls of the fixed knife rest are equal in height at the basin opening, the top surface of the fixed knife is a plane, and the top surface of the movable knife is a plane matched with the bottom surface of the fixed knife.

A reciprocating razor cartridge as claimed in the above, characterized in that: the basin wall is higher than about the basin wall around the stationary knife rest, and the top of basin wall is arc structure and with about basin wall rounding off around and, the top surface of stationary knife is the cambered surface corresponding with basin wall around with, the top surface of moving the sword is the cambered surface with the bottom surface matched with of stationary knife.

Compared with the prior art, the utility model discloses there is following advantage:

1. in the utility model, the fixed knife is a flexible metal sheet, and the fixed knife is supported by the peripheral basin wall of the fixed knife rest by utilizing the flexibility and toughness of the flexible metal sheet, the fixed knife can be stretched all around, the fixed knife is bent, tensioned and adhered to the peripheral basin wall outside of the fixed knife rest under the action of certain external force, and the fixed knife is tightly fixed on the basin wall of the fixed knife rest by welding or riveting, so that the top surface of the fixed knife and the side surface close to the top surface are in smooth transition, the upper end of the fixed knife rest and the basin mouth are wrapped from top to bottom to form a leather drum structure, the top surface and the side surface of the fixed knife are the top surface and the side surface of the razor head, smooth and neat, and skin-adhered, when hair is cut, the razor head moves by adhering the skin to the top surface of the fixed knife and/or the side surface close to the top surface, the cutting surface can be cut all-dimensionally and has good cutting effect, the shaver can conveniently cut concave parts of a body, and the contact surface with the skin is the top surface of the stationary knife in smooth transition and/or the side surface close to the top surface, so that the shaver head can smoothly slide on the surface of the skin, and the shaving comfort is good.

2. The utility model discloses well stationary knife and stationary knife frame form similar leather drum structure, and the stationary knife is the drum body, and the stationary knife is the taut drum skin that covers on the drum body, because the drum skin of leather drum has the principle of pretension, the stationary knife is taut on the stationary knife frame, makes the stationary knife obtain very smooth cutting working face with moving the contact of sword under the prerequisite that does not need extra precision finishing, simple process, and processing is convenient, and part low in manufacturing cost; in addition, the rigidity requirement of the fixed cutter is avoided, the thickness of the fixed cutter can be ultrathin, which cannot be realized by other process structures, the thickness h of the fixed cutter can be in the range of 0< h <0.08mm, so that the influence of the thickness of the fixed cutter can be ignored during shaving, and the body hair can be cut cleanly at one time.

3. The utility model discloses in the pore that advances that lies in on the left and right sides be the gorge structure of indent from the outside to inboard in the left and right direction, this gorge structure comprises continuous smooth curve, and from the outside to the middle part by wide to narrow, from the middle part to inboard widen by narrow widen again, the width of its outside entrance is L1, the width of middle part narrowest department is L2, corresponding cutting tooth is located the inboard of narrowest department; the initial position of the cutting of the isthmus structure, that is, the position of the isthmus structure at the outer edge of the corresponding cutting tooth, the width of the initial position of the cutting is L3, the depth from the narrowest point of the middle part to the outer edge of the corresponding cutting tooth is L4, and the depth from the outer entrance to the outer edge of the corresponding cutting tooth is L5, which satisfies the following relation: l1 is more than L3 is more than L2, L2 is more than or equal to 0.1mm and less than or equal to 0.3mm, L4 is more than or equal to 0.1mm and less than or equal to 1mm, L5 is more than or equal to 1.2mm, L4 is more than or equal to 0.4mm within the preferred range, and L5 is less than or equal to 1.0mm, so that the hair can be conveniently fed into the hair inlet hole, the hair can be prevented from running out after entering, a good cutting effect is achieved, meanwhile, meat can be squeezed out at a narrow position during moving cutting, and the moving knife which moves at a high speed at the initial position generated by skin contact cutting is prevented.

4. The utility model discloses in the top surface and the left and right sides face of stationary knife are the acute angle respectively, and are formed with slick and sly transitive chamfer between top surface and the left and right sides face, the height D of chamfer <1.0mm, make the fixed cutting tooth of the left and right sides form one and do benefit to the broach structure of combing hair, lead the hair and advance a mao effectual, improve cutting effect.

5. The utility model discloses in reciprocating type razor tool bit's manufacturing method, simple process, low in manufacturing cost, this razor tool bit's top surface and the side that is close to the top surface are formed by parcel down after a holistic stationary knife is tensile, and level and smooth neatly, skin nature is good, avoids the higher rigidity requirement to the stationary knife in addition, and the thickness that makes the stationary knife can accomplish other technological structure can't be realized is ultra-thin, can ignore the influence of the thickness of stationary knife when making the hair shaving, can once only make the body hair excision cleaner.

6. The utility model discloses in the thickness of stationary knife is h, satisfies: h is more than 0 and less than or equal to 0.08mm, and the ultra-thin flexible metal sheet is adopted, so that the body hair can be cut more thoroughly and cleanly.

7. The utility model discloses in move and be equipped with between sword and the stationary knife rest and can compress tightly the elasticity casting die on the stationary knife moving the sword for the body hair excision is easier, and it is sharp to show reciprocating type razor tool bit more.

[ description of the drawings ]

Figure 1 is an exploded view of a reciprocating razor cartridge of the present invention;

FIG. 2 is a schematic view of a reciprocating razor head according to the present invention;

FIG. 3 is a bottom view of a reciprocating razor head according to the present invention;

FIG. 4 is a schematic diagram of the stretching and bending of the middle fixed knife of the present invention;

FIG. 5 is a schematic view of the cutter head in a state where the stationary cutter is not mounted;

figure 6 is a top view of a reciprocating razor head of the present invention;

FIG. 7 is a cross-sectional view taken along the line A-A in FIG. 6;

FIG. 8 is a cross-sectional view of a tool tip with a cambered top surface in the direction B-B in FIG. 6;

FIG. 9 is an exploded view of a stationary knife and a corresponding stationary knife holder with a cambered surface structure on the top surface;

FIG. 10 is an exploded view of a stationary knife and a corresponding stationary knife holder having a planar top surface;

FIG. 11 is a cross-sectional view of the tool tip with a planar top surface in the direction B-B of FIG. 6;

fig. 12 is a schematic diagram of the structure of the pore entering on the left and right sides.

[ detailed description ] embodiments

The invention will be further described with reference to the accompanying drawings:

as shown in fig. 1 to 12, a reciprocating razor head comprises a fixed knife 1 and a fixed knife holder 2 for supporting and fixing the fixed knife 1, wherein the fixed knife 1 is a flexible metal sheet, the fixed knife holder 2 is a basin-shaped bracket, the fixed knife 1 is supported by the edge of the basin mouth of the fixed knife holder 2, the periphery of the fixed knife 1 is downwards bent and wrapped on the outer side of the basin wall at the periphery of the fixed knife holder 2, the top surface of the fixed knife 1 is smoothly transited with the side surface close to the top surface, a cutting inner cavity 10 is formed between the fixed knife 1 and the fixed knife holder 2, the fixed knife 1 is provided with an hair inlet hole 11 for allowing body hair to enter the cutting inner cavity 10, the side wall of the hair inlet hole 11 forms a cutting edge, a movable knife 3 which is arranged below the fixed knife 1 in the cutting inner cavity 10 and can reciprocate back and forth relative to the fixed knife 1 to cut off the body hair in the hair inlet hole 11, the movable knife 3 is provided with cutting teeth 31 corresponding to the hair inlet hole 11 and used, the reciprocating razor head also comprises a transmission part 4 which passes through the bottom of the fixed blade frame 2 and connects the movable blade 3 with the power device of the electric razor.

Because the fixed knife 1 is a flexible metal sheet, the fixed knife 1 can be stretched towards the periphery by utilizing the flexibility and toughness of the flexible metal sheet through the support of the peripheral basin wall of the fixed knife rest 2, the periphery of the fixed knife 1 is bent downwards, tensioned and adhered to the outer side of the peripheral basin wall of the fixed knife rest 2 under the action of certain external force, the fixed knife 1 is tightly fixed on the basin wall of the fixed knife rest 2 through welding or riveting, the top surface and the side surface close to the top surface of the fixed knife 1 are in smooth transition, the upper end and the basin mouth of the fixed knife rest 2 are wrapped from top to bottom to form a structure similar to a leather drum, and the top surface and the side surface of the fixed knife 1 are the top surface and the side surface of the razor head, smooth and neat and skin-adhered. When the shaver head cuts hair, the top surface, the side surface close to the top surface, or both the top surface and the side surface of the fixed cutter 1 are attached to the skin to move, the cutting surface can be attached to the skin in an omnibearing manner to cut, the cutting effect is good, some concave parts of a body can be cut conveniently, and the top surface, the side surface close to the top surface, or both the top surface and the side surface of the fixed cutter 1 in smooth transition with the contact surface of the skin are in contact with the skin simultaneously, so that the shaver head can slide on the surface of the skin smoothly, and the shaving comfort is good.

In addition, the fixed cutter 1 and the fixed cutter frame 2 form a structure similar to a leather drum, the fixed cutter frame 2 is a drum body, the fixed cutter 1 is a tensioned drum skin covered on the drum body, and the fixed cutter 1 is tightened on the fixed cutter frame 2 due to the principle that the drum skin of the leather drum has pretension force, so that the fixed cutter 1 can obtain a very flat cutting working surface in contact with the movable cutter 3 on the premise of not needing extra precision machining, the process is simple, the machining is convenient, and the manufacturing cost of parts is low; in addition, the rigidity requirement of the fixed cutter 1 is avoided, the thickness of the fixed cutter 1 can be ultrathin, which cannot be realized by other process structures, the thickness h of the fixed cutter 1 can be in the range of 0< h <0.08mm, so that the influence of the thickness of the fixed cutter 1 can be ignored during shaving, and the body hair can be cut cleanly at one time.

The round corners 22 which enable the left and right basin walls and the front and rear basin walls to be in smooth transition connection are arranged between the left and right basin walls and the front and rear basin walls of the fixed knife rest 2, so that the fixed knife 1 can be conveniently bent and coated downwards, the peripheral circular arcs of the fixed knife 1 are enabled to be in transition, and the cutting comfort is improved.

The hair inlet holes 11 can be uniformly formed in the left side of the fixed cutter 1, can also be uniformly formed in the right side of the fixed cutter 1, and can also be formed in the left side and the right side of the fixed cutter 1, the fixed cutting teeth 12 are formed between every two adjacent hair inlet holes 11, hair inlet grooves 21 which correspond to the hair inlet holes 11 and can supply hairs to enter and exit the cutting inner cavity 10 are formed in the left basin wall and the right basin wall of the fixed cutter frame 2, the hairs can be fed through the hair inlet grooves 21, and after shaving is completed, the hairs can be cleared and fall off by a user. Of course, the stationary blade holder 2 may be further provided with hair dropping holes 23 for cutting off hairs falling out of the cutting cavity 10, so as to clean the hairs more conveniently.

The top surface and the left and right side surfaces of the fixed cutter 1 form acute angles respectively, a chamfer R1 in smooth transition is formed between the top surface and the left and right side surfaces, the height D of the chamfer R1 is less than 1.0mm, the hair guiding and entering effect is good, and the cutting effect is improved.

The pore 11 on the left and right sides is an isthmus structure which is concave from the outside to the inside in the left-right direction, as shown in fig. 12, the isthmus structure is composed of a continuous smooth curve, and is wide to narrow from the outside to the middle part, and is wide from the middle part to the inside, the width of the inlet on the outside is L1, the width of the narrowest part of the middle part is L2, and the corresponding cutting tooth 31 is located on the inside of the narrowest part of the middle part; the initial position of the cutting of the isthmus structure, i.e. the position of the isthmus structure corresponding to the outer edge of the cutting tooth 31, has a width L3, and satisfies the following relation: l1, L3, L2 and L2 are respectively in a range of 0.1mm to 0.3mm, the inlet is wide, so that hairs can be fed conveniently, the middle part is narrow, the inner side is wide, the hairs can be prevented from running out after entering, meanwhile, meat entering from the inlet at the outer side can be squeezed out at the narrow part during moving cutting, and the moving knife moving at a high speed at the initial position generated by skin contact cutting is prevented.

As shown in fig. 12, the depth of the isthmus structure from the narrowest part of the middle part to the outer edge of the corresponding cutting tooth 31 is L4, and L4 is more than or equal to 0.1mm and less than or equal to 1mm, so that when a part of the skin deformed under extrusion protrudes inwards at the narrowest part of the middle part, the cutting tooth 31 cuts the skin, and the preferable range is more than or equal to 0.2mm and less than or equal to L4 and less than or equal to 0.4mm, thereby not only playing the safety protection, but also well ensuring the cutting of hair; the depth of the isthmus structure from the outer side entrance to the outer edge of the corresponding cutting tooth 31 is L5, L5 is less than or equal to 1.2mm, and the preferred range L5 is less than or equal to 1.0mm, so that the hair can be guided into the cutting teeth for cutting, the depth of the isthmus structure can be conveniently controlled, and the structural strength of the fixed cutting tooth 12 can be ensured.

The middle part of the fixed knife 1 can also be provided with an air inlet hole 11, and the middle part of the movable knife 3 is correspondingly provided with cutting teeth 31 so as to cut hair in multiple directions.

The left and right pot walls and the front and rear pot walls of the fixed knife rest 2 are equal in height at the pot opening, the top surface of the fixed knife 1 is a plane, and the top surface of the movable knife 3 is a plane matched with the bottom surface of the fixed knife 1, so that plane cutting is realized, as shown in fig. 10 and 11.

Certainly, as fig. 8 and 9, the basin wall about can also being higher than around the stationary knife rest 2 around, and the top of basin wall around and be the arc structure and with control basin wall rounding off, the top surface of stationary knife 1 is the cambered surface corresponding with basin wall around with, the top surface of moving knife 3 is the cambered surface with the bottom surface matched with of stationary knife 1, realizes the cambered surface cutting, preferably, when the top surface of stationary knife 1 is the cambered surface structure, the middle part of stationary knife 1 has into pore 11, and the middle part of moving knife 3 corresponds there is cutting tooth 31 to the shaving that can be better cuts the concave part of health.

The transmission part 4 comprises a movable blade bracket 41 fixedly connected with the movable blade 3 and a driving seat 42 connected with a power device of the electric shaver, an elastic pressing piece 5 capable of pressing the movable blade 3 on the fixed blade 1 is arranged between the movable blade 3 and the fixed blade bracket 2, and the movable blade 3 is pressed upwards through the elastic pressing piece 5, so that the movable blade 3 and the fixed blade 1 are tightly attached to form a pre-pressure force, and the sharpness of the body hair cut by the reciprocating shaver head is ensured.

A sliding support block 6 for supporting the movable blade holder 41 and guiding the movable blade holder 41 to reciprocate back and forth is fixed at the bottom of the stationary blade holder 2, and the sliding support block 6 may be fixed on the stationary blade holder 2 by injection molding with the stationary blade holder 2 as shown in fig. 8 and 11.

The fixed knife 1 and the fixed knife rest 2 are made of weldable metal materials, so that the side surface of the fixed knife 1 bent downwards from the periphery is welded on the peripheral basin wall of the fixed knife rest 2.

The fixed knife rest 2 is of a basin-shaped structure with a large basin opening and a small basin bottom, and the basin wall around the fixed knife rest 2 retracts from top to bottom inwards by taking the basin opening as a base point, so that the edge of the fixed knife 1 retracts into the inner side below the top of the razor head after being fixed on the basin wall, and the skin is prevented from being contacted.

A method of manufacturing a reciprocating razor head as described above, comprising the steps of:

A. a fixed knife 1 in an unfolded state and a fixed knife rest 2 in a basin-shaped structure are manufactured according to design;

B. the movable knife 3 is connected with the transmission component 4 and is arranged in the fixed knife rest 2, as shown in figure 5, the movable knife 3 is fixedly connected with the movable knife bracket 41 and then is placed in the fixed knife rest 2 from the basin mouth, and the driving seat 42 is connected with the movable knife bracket 41 from a through hole on the basin bottom of the fixed knife rest 2 and then is placed below the bottom of the fixed knife rest 2;

C. stretch stationary knife 1 to all around to the basin mouth edge of stationary knife rest 2 is for supporting, buckle, take-up, paste stationary knife 1 all around down under certain exogenic action on the basin wall outside around stationary knife rest 2, and through welding or riveting with stationary knife 1 tight fix on the basin wall of stationary knife rest 2, make the top surface of stationary knife 1 and the side rounding off that is close to the top surface, wrap up the upper end of stationary knife rest 2 and basin mouth from last down, form the leather drum structure.

In order to make the movable knife 3 and the fixed knife 1 tightly contact to form pre-pressure and improve the cutting sharpness, in the step B, an elastic pressing piece 5 is arranged in the fixed knife rest 2 and is arranged below the movable knife 3, and the movable knife 3 is elastically jacked up above the pot mouth of the fixed knife rest 2 through the elastic pressing piece 5. In the step C, when the stationary knife 1 is wrapped on the pot opening of the stationary knife holder 2, and the stationary knife 1 is bent, tightened and tightened on the pot wall of the stationary knife holder 2, the inner side of the stationary knife 1 presses the movable knife 3 downward against the movable knife 3, and pre-pressure is formed between the movable knife 3 and the stationary knife 1.

The manufacturing method has simple process and low manufacturing cost, the top surface of the razor head and the side surface close to the top surface are formed by stretching and then wrapping the whole fixed cutter, the razor head is smooth and neat, the skin sticking performance is good, the requirement on higher rigidity of the fixed cutter 1 is avoided, the thickness of the fixed cutter 1 can be ultrathin which can not be realized by other process structures, the influence of the thickness of the fixed cutter 1 can be ignored during shaving, and the body hair can be cut cleanly at one time.

Claims

1. A reciprocating razor cartridge characterized by: the fixed knife is characterized by comprising a fixed knife (1) and a fixed knife rest (2) used for supporting and fixing the fixed knife (1), wherein the fixed knife (1) is a flexible metal sheet, the fixed knife rest (2) is a basin-shaped support, the fixed knife (1) is supported by the edge of a basin mouth of the fixed knife rest (2), the periphery of the fixed knife (1) is downwards bent to wrap the outside of the basin wall at the periphery of the fixed knife rest (2) and the top surface of the fixed knife (1) and the side surface close to the top surface are in smooth transition, a cutting inner cavity (10) is formed between the fixed knife (1) and the fixed knife rest (2), a hair feeding hole (11) for feeding donor hairs into the cutting inner cavity (10) is formed in the fixed knife (1), a movable knife (3) which can reciprocate back and forth relative to the fixed knife (1) to cut off the hair in the hair feeding hole (11) is arranged below the cutting inner cavity (10), cutting teeth (31) corresponding to the hair feeding hole (11) and used for cutting the hair are arranged on the movable knife (3), the reciprocating razor head also comprises a transmission part (4) which passes through the bottom of the fixed razor frame (2) and connects the movable razor (3) with the power device of the electric razor.

2. A reciprocating razor cartridge as claimed in claim 1, wherein: and a fillet (22) for enabling the left and right basin walls and the front and rear basin walls to be in smooth transition connection is arranged between the left and right basin walls and the front and rear basin walls of the stationary knife rest (2).

3. A reciprocating razor cartridge as claimed in claim 1, wherein: the fixed knife rest (2) is provided with a hair dropping hole (23) for cutting off hair in the cutting inner cavity (10) to drop out.

4. A reciprocating razor cartridge as claimed in claim 1, wherein: the fixed knife (1) and the fixed knife rest (2) are made of weldable metal materials, and the side surface of the fixed knife (1) bent downwards from the periphery is welded on the peripheral basin wall of the fixed knife rest (2).

5. A reciprocating razor cartridge as claimed in any one of claims 1 to 4, wherein: the hair feeding holes (11) are uniformly formed in the left side and/or the right side of the fixed cutter (1), fixed cutting teeth (12) are formed between every two adjacent hair feeding holes (11), and hair feeding grooves (21) which correspond to the hair feeding holes (11) and can allow hairs to enter and exit the cutting inner cavity (10) are formed in the left basin wall and/or the right basin wall of the fixed cutter frame (2).

6. A reciprocating razor cartridge as claimed in claim 5, wherein: the top surface and the left and right side surfaces of the fixed cutter (1) form acute angles respectively, a chamfer (R1) in smooth transition is formed between the top surface and the left and right side surfaces, and the height D of the chamfer (R1) is less than 1.0 mm.

7. A reciprocating razor cartridge as claimed in claim 5, wherein: the left and/or right pore (11) is an isthmus structure which is concave inwards from the outer side to the inner side in the left-right direction, the isthmus structure consists of a continuous smooth curve, the width is from the outer side to the middle part and the width is from the middle part to the inner side, the width is wider, and the corresponding cutting tooth (31) is positioned on the inner side of the narrowest part of the middle part.

8. A reciprocating razor cartridge as claimed in claim 7, wherein: the width of the entrance at the outer side of the isthmus structure is L1, the width of the narrowest part of the middle part is L2, the width of the position, corresponding to the outer edge of the cutting tooth (31), of the isthmus structure is L3, the depth from the narrowest part of the middle part to the outer edge of the corresponding cutting tooth (31) is L4, the depth from the entrance at the outer side to the outer edge of the corresponding cutting tooth (31) is L5, and the following relational expressions are satisfied: l1 is more than L3 is more than L2, L2 is more than or equal to 0.1mm and less than or equal to 0.3mm, L4 is more than or equal to 0.1mm and less than or equal to 1mm, and L5 is more than or equal to 1.2 mm.

9. A reciprocating razor cartridge as claimed in any one of claims 1 to 4, wherein: the height of the left and right basin walls and the front and rear basin walls of the fixed knife rest (2) at the basin opening is equal, the top surface of the fixed knife (1) is a plane, and the top surface of the movable knife (3) is a plane matched with the bottom surface of the fixed knife (1).

10. A reciprocating razor cartridge as claimed in any one of claims 1 to 4, wherein: the basin wall is higher than about basin wall around stationary knife rest (2), and the top of basin wall around and for the arc structure and with about basin wall rounding off, the top surface of stationary knife (1) is the cambered surface corresponding with basin wall around with, the top surface of moving sword (3) is the cambered surface with the bottom surface matched with of stationary knife (1).