Inner cutter structure of electric shaver

Abstract

The utility model provides an inner knife structure of an electric shaver, which comprises an inner knife holder, an outer knife holder and an outer knife holder, the inner knife holder comprises a plastic knife holder body and a metal shaping part with thickness, the metal shaping part is arranged in the plastic knife holder body through integral injection molding, and the metal shaping part extends in the plastic knife holder body along the length direction of the plastic knife holder body; the inner knife comprises at least one inner blade unit fixedly mounted in the plastic knife holder body, and the inner blade units are fixedly mounted in the plastic knife holder body and above the metal shaping piece in the length direction at intervals; an inner cutting edge matched with the outer cutter is arranged at the top of the inner blade unit. The strength of the inner tool apron is enhanced through the built-in metal shaping piece, and the metal shaping piece corresponds to the inner tool apron body in length and is integrally formed in the inner tool apron body in an injection molding mode, so that deformation of the inner tool apron is effectively prevented, the service life of the inner tool apron and the service life of a whole machine are guaranteed, and the rib width of the inner tool of the structure can be as low as 0.1 mm. And the sharpness, the cutting efficiency and the beard feeding amount of the inner cutter are greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a head of an electric shaver, especially an inner cutter structure of a reciprocating electric shaver. BACKGROUND

[0002] Personal care products, such as shavers, include a head and a handle, and a cutting operation is realized by relative movement of an inner cutter and an outer cutter in the head, the inner cutter and the outer cutter are respectively installed on respective cutter holders, and the inner cutter holder that generally erects the inner cutter is installed in a containing groove of the outer cutter holder. For an electric shaver, the relative movement of the inner cutter and the outer cutter is mainly realized by the inner cutter as a moving part, and more precisely, by driving the inner cutter seat that is installed with the inner cutter to move, and the inner cutter seat is made of plastic material for noise reduction and heat dissipation. A general inner cutter structure is divided into a plug-in piece type and a frame etching cutter, and the inner cutter seat of the plug-in piece type inner cutter is prone to thermal expansion and contraction deformation in long-term high-speed movement due to structural relationship, especially the reciprocating inner cutter seat is prone to deformation in the length direction, which affects the cooperation between the inner cutter and the outer cutter, and for the frame etching cutter, the frame etching cutter needs to be provided with a wide rib with a width of at least 0.4 mm to realize the required beard entry and cutting efficiency due to the limitation of the slit cutter blade structure. SUMMARY

[0003] The utility model provides a simple structure, connect stable, efficient reciprocating cutter head's electric shaver's inner cutter structure.

[0004] To solve the above technical problems, the utility model adopts the following technical scheme: an inner cutter structure of an electric shaver, comprising: an inner cutter seat, comprising a plastic cutter seat body and a metal shaping member with thickness built-in the plastic cutter seat body by integral injection molding, the metal shaping member extends in the plastic cutter seat body along the length direction of the plastic cutter seat body;

[0005] An inner cutter comprises at least one inner cutter piece unit fixedly installed in the plastic cutter seat body, and the inner cutter piece unit is fixedly installed above the metal shaping member along the length direction in the plastic cutter seat body;The top of the inner cutter piece unit is provided with an inner cutter edge matched with the outer cutter.

[0006] As an improvement: the plastic cutter seat body is integrally formed and comprises a lower base extending in the length direction, a spacer unit arranged and distributed on the lower base with a vertical gap, and a horizontal gap for the metal shaping member between the lower base and the lower bottom surface of the spacer unit, and the inner cutter piece unit extends out of the plastic cutter seat body through the vertical gap and cooperates with the lower surface of the outer cutter.

[0007] As an improvement: the spacer unit includes a first spacer unit for fixing the inner blade unit and a second spacer unit arranged between two adjacent inner blade units, the metal shaping member is provided with a second through hole corresponding to the position of the second spacer unit, and the lower base is provided with a second connecting column penetrating through the second through hole and connected with the lower bottom surface of the second spacer unit.

[0008] As an improvement: the inner blade unit includes a vertically arranged blade body, the inner blade is arranged at the top of the blade body, a through hole is arranged in the middle of the blade body, the blade body is arranged in the vertical gap, and a positioning column penetrating through the through hole and connecting the spacer units on both sides of the blade body is formed by integral injection molding.

[0009] As an improvement: the inner blade unit includes at least two vertically arranged blade bodies with a spacing, and a connecting piece connected between the bottom edges of the blade bodies.

[0010] As an improvement: the connecting piece is provided with one or more positioning holes, the metal shaping member is provided with a first through hole corresponding to the position of the positioning hole of the connecting piece, and the lower base is provided with a first connecting column penetrating through the first through hole and the positioning hole and connected with the lower bottom surface of the spacer unit.

[0011] As an improvement: the metal shaping member of the lower base is in the shape of an inverted U, that is, the metal shaping member includes a base body arranged on the lower base and a pressing edge bent downward from the two long edges of the base body and pressed on the long side of the lower base.

[0012] The inner blade seat is strengthened by the built-in metal shaping member, the metal shaping member corresponds to the inner blade seat body in length and is integrally injected, the metal shaping member is a self-clamping layer of the inner blade seat, the deformation of the inner blade seat is effectively prevented, the service life of the inner blade seat and the whole machine is guaranteed, the inner blade is integrally injection molded with the molded blade seat body, the metal shaping member and the inner blade, the inner blade is accurately positioned on the inner blade seat, the sharpness, cutting efficiency and feed amount of the inner blade are greatly improved, the structure is stable, accurate and without other fasteners, and the processing steps are few.

[0013] The utility model will be further described in detail in combination with the drawings and examples. DRAWINGS

[0014] Figure 1 It is the whole structure schematic view of the inner blade structure of the electric shaver provided by the utility model.

[0015] Figure 2 It is Figure 1 the explosion structure schematic view.

[0016] Figure 3 is a rear view of Figure 1 .

[0017] Figure 4 is a sectional view along K-K of the second spacer unit in Figure 3 .

[0018] Figure 5 is a sectional view along L-L of the first spacer unit in Figure 3 . DETAILED DESCRIPTION

[0019] As shown in Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , the inner cutter structure of the electric shaver comprises an inner cutter seat, an inner cutter, and a metal shaping member. The inner cutter seat comprises a molded cutter seat body and a metal shaping member which is integrally molded in the molded cutter seat body and has a thickness. The metal shaping member extends along the length direction of the molded cutter seat body in the molded cutter seat body. The inner cutter comprises at least one inner cutter blade unit which is fixedly installed in the molded cutter seat body and arranged along the length direction of the metal shaping member. The top of the inner cutter blade unit is provided with an inner cutter edge which is matched with the outer cutter. The inner cutter edge of the top of the inner cutter blade unit is exposed from the inner cutter seat.

[0020] The plastic cutter base body 1 is integrally formed and includes a length direction extending lower base 11, and a vertical slit 13 arranged distribution partition rib unit 12 on the lower base 11. The lower base 11 and the lower bottom surface of the partition rib unit 12 are provided with a horizontal gap for laying the metal shaping part 2. The inner blade unit extends out of the plastic cutter base body 1 through the vertical slit and cooperates with the outer cutter lower surface. The inner cutter seat has a compact overall structure. The plastic cutter base body 1, the metal shaping part 2 and the inner cutter are tightly matched and integrally connected stably. The partition rib unit can not only ensure the stable position of the inner blade unit in the plastic cutter base body 1, but also provide lateral support for the inner blade unit during cutting operation, effectively preventing the deformation and displacement of the inner blade unit during operation, and providing accurate and reliable protection for the cooperation of the inner and outer cutters. The inner cutter of the embodiment is a vertical cutter, which is an improved plug-in type. The inner blade unit 3 includes a vertical piece type cutter body 32. The inner blade unit includes at least two piece type cutter bodies 32 vertically arranged with a spacing, and a connecting piece 33 connected between the bottom edges of the piece type cutter bodies 32. The embodiment has a two-piece cutter body structure, which can also be a single L-shaped or multi-piece spaced connection type, which can be set as needed. The inner cutter blade is located at the top of the piece type cutter body. A through hole 32a is formed in the middle of each piece type cutter body. The piece type cutter body 32 is clamped in the vertical slit 13. The width of the vertical slit 13 corresponds to the thickness of the piece type cutter body 32. The positioning column 15 integrally injection molded through the through hole 32a connects the partition rib units 12 on both sides of the piece type cutter body 32. The positioning column 15 can limit the height of the piece type cutter body 32 and even the entire inner blade unit. The connecting piece 33 of the embodiment is designed without holes. The metal shaping part 2 has a plurality of first through holes 22. The lower base 11 has a first connecting column 16 that penetrates the first through hole 22 and abuts against the lower bottom surface of the connecting piece. The first connecting column 16 not only supports the inner blade unit, but also supports the inner blade unit during cutting operation with the outer cutter. The partition rib unit 12 is an inner and outer wrapping support type positioning inner blade unit. The inner blade unit is stably positioned in all directions. The height of the partition rib unit 12 is lower than the height of the inner blade unit on the lower base, so that the inner cutter blade 31 of the piece type cutter body 32 can be completely exposed, and the space groove for entering and falling whiskers is formed between the two inner cutter blades 31. The height of the partition rib unit 12 can be determined according to the longitudinal width and the amount of entering and falling whiskers. Of course, the connecting piece 33 has two longitudinally arranged positioning holes. The metal shaping part 2 has a first through hole 22 corresponding to the connecting piece positioning hole 33a. The lower base 11 has a first connecting column 16 that penetrates the first through hole 22 and the positioning hole 33a and is integrally connected with the lower bottom surface of the partition rib unit 12.The cooperation of the first connecting column 16 and the positioning hole 33a limits the entire inner blade unit in the transverse direction on the lower base 11, and the connecting piece 33 is at least partially clamped between the spacer rib unit 12 and the metal shaping member 2. This scheme has a higher requirement for the gap between the lower bottom surface of the spacer rib unit where the inner blade unit is located and the lower base 11, that is, it must correspond to the sum of the thicknesses of the metal shaping member 2 and the connecting piece 33. However, the present embodiment adopts a non-hole design, and the first connecting column 16 directly abuts against the lower bottom of the connecting piece 33, which is beneficial to the consistency between the support and the inner blade unit, and simplifies the processing injection molding.

[0021] The spacer rib unit 12 of the present embodiment includes a first spacer rib unit 12a for fixing the inner blade unit 3 and a second spacer rib unit 12b arranged between two adjacent inner blade units 3. The metal shaping member 2 is provided with a second through hole 21 corresponding to the position of the second spacer rib unit 12b, and the lower base 11 is provided with a second connecting column 14 connected with the lower bottom surface of the second spacer rib unit 12b through the second through hole 21. Since the multiple second spacer rib units 12b are directly connected on the lower base, the first spacer rib 12a is provided with overall support, effectively avoiding the risk of deformation or breakage of the spacer rib unit or the overall plastic cutter base body 1, further improving the stability and deformation resistance of the metal shaping member 2, and also achieving good shock absorption and noise reduction effects.

[0022] In order to further avoid thermal expansion and contraction and improve the deformation resistance of the inner cutter, the metal shaping member 2 of the present embodiment is provided with a cover in the form of an inverted U-shaped cross section, that is, the metal shaping member 2 includes a base body 23 laid on the lower base 11 and a pressing edge 24 bent downward from the two long edges of the base body 23 to press on the long side of the lower base. The pressing edge 24 can effectively longitudinally shape the lower base and provide wrapping and shaping support for the lower base.

[0023] The inner cutter structure of the razor of the present embodiment is processed by the following steps:

[0024] Inner cutter processing: processing to form at least one inner blade unit 3 with an inner cutter blade 31 on the top;

[0025] Metal shaping member processing: stretching and stamping the metal shaping member according to the length of the inner cutter;

[0026] Positioning cloth member: arranging and positioning the inner blade unit above the metal shaping member in the cutter base injection mold, and then injecting;

[0027] The inner knife seat is formed by injection molding, so that the metal shaping part 2 with thickness and the inner blade unit are fixed in the molded seat body 1, and the inner blade edges 31 at the top of the inner blade unit are exposed from the inner knife seat, and the adjacent two inner blade edges 31 form a whisk space with a spacing. Since the molded seat body, the metal shaping part and the inner knife are connected and fixed as a whole by one-time injection molding, compared with the fastener connection, the connection and stability are higher in stability, accuracy and reliability, and the processing is convenient, the parts are few, the strength is high and the cost is low.

[0028] Although the utility model has disclosed as above with specific embodiments, however it is not used to limit the utility model, any person skilled in the art, still can make some changes and adornment without departing from the spirit and scope of the utility model, therefore the protection scope of the utility model should be regarded as the range of the appended claims is defined.

Claims

1. An internal blade structure for an electric shaver, characterized in that: include: The inner blade holder includes a plastic blade holder body (1) and a metal shaping part (2) with thickness that is integrally injection molded and built into the plastic blade holder body (1). The metal shaping part (2) extends along the length direction of the plastic blade holder body (1) within the plastic blade holder body (1). The inner blade includes at least one inner blade unit (3) fixedly installed in the plastic blade holder body (1). The inner blade units (3) are fixedly installed in the plastic blade holder body (1) above the metal shaping part (2) along the length direction. The top of the inner blade unit (3) is provided with an inner blade edge (31) that cooperates with the outer blade.

2. The inner blade structure of the electric shaver according to claim 1, characterized in that: The plastic blade holder body (1) is integrally formed, including a lower base (11) extending in the length direction and a rib unit (12) with vertical gaps (13) arranged on the lower base (11). There is a horizontal gap between the lower base (11) and the bottom surface of the rib unit (12) for laying metal shaping parts (2). The inner blade unit extends out of the plastic blade holder body (1) through the vertical gap and cooperates with the lower surface of the outer blade.

3. The inner blade structure of the electric shaver according to claim 2, characterized in that: The partition unit (12) includes a first partition unit (12a) for fixing the inner blade unit (3) and a second partition unit (12b) disposed between two adjacent inner blade units (3). The metal shaping part (2) has a second through hole (21) at the position corresponding to the second partition unit (12b). The lower base (11) has a second connecting post (14) that passes through the second through hole (21) and is integrally connected to the bottom surface of the second partition unit (12b).

4. The inner blade structure of the electric shaver according to claim 2 or 3, characterized in that: The inner blade unit (3) includes a vertically arranged blade body (32), the inner blade is located at the top of the blade body, and a through hole (32a) is opened in the middle of the blade body. The blade body (32) is clamped in the vertical gap (13) and a positioning post (15) is formed by integral injection molding, which passes through the through hole (32a) and connects the rib units (12) on both sides of the blade body (32).

5. The inner blade structure of the electric shaver according to claim 4, characterized in that: The inner blade unit includes at least two vertical blade bodies (32) with a gap between them, and a connecting piece (33) connecting the bottom edges of the blade bodies (32).

6. The inner blade structure of the electric shaver according to claim 5, characterized in that: The connecting piece (33) has one or more positioning holes, and the metal shaping part (2) has a first through hole (22) at the corresponding positioning hole position of the connecting piece. The lower base (11) has a first connecting column (16) that is integrally connected to the bottom surface of the rib unit (12) through the first through hole (22) and the positioning hole.

7. The inner blade structure of the electric shaver according to claim 2 or 3, characterized in that: The metal shaping part (2) covering the lower base (11) has an inverted U-shaped cross section. That is, the metal shaping part (2) includes a base (23) laid on the lower base (11) and a pressing edge (24) formed by bending down from the two long sides of the base (23) to cover the long side of the lower base.

8. The inner blade structure of the electric shaver according to claim 4, characterized in that: The metal shaping part (2) covering the lower base (11) has an inverted U-shaped cross section. That is, the metal shaping part (2) includes a base (23) laid on the lower base (11) and a pressing edge (24) formed by bending down from the two long sides of the base (23) to cover the long side of the lower base.

9. The inner blade structure of the electric shaver according to claim 5, characterized in that: The metal shaping part (2) covering the lower base (11) has an inverted U-shaped cross section. That is, the metal shaping part (2) includes a base (23) laid on the lower base (11) and a pressing edge (24) formed by bending down from the two long sides of the base (23) to cover the long side of the lower base.

10. The inner blade structure of the electric shaver according to claim 6, characterized in that: The metal shaping part (2) covering the lower base (11) has an inverted U-shaped cross section. That is, the metal shaping part (2) includes a base (23) laid on the lower base (11) and a pressing edge (24) formed by bending down from the two long sides of the base (23) to cover the long side of the lower base.

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