Reciprocating cutter head group

Abstract

A reciprocating cutter head group includes a housing, a fixed blade, and a cutting moving blade adapted to the fixed moving blade and having a cutting edge. The fixed blade is integrally formed of a flexible metal sheet. The fixed blade includes a skin-friendly wall that faces the skin and has a plurality of first hair inlets during operation, two inwardly converging walls that respectively form an inwardly converging angle with both sides of the skin-friendly wall, two connecting portions that are respectively connected to the two inwardly converging walls in an arc shape and are arranged opposite to each other, and two inwardly converging walls. The cross-section of the connecting portion is L-shaped. The two inwardly converging walls and the two connecting portions are sequentially connected downward from both sides of the skin-friendly wall and are arranged opposite to each other to form a receiving groove with a hat-shaped cross-section for setting the cutting moving blade. A mouth-corner connection structure in the shape of an outwardly convex "}" or "{" is formed between the skin-friendly wall and the inwardly converging wall. The mouth-corner connection structure can well support the skin-friendly wall. The thickness of the fixed blade is as thin as less than 10 silk, even as thin as 4-5 silk, achieving an ultra-thin that cannot be realized by other process structures.

Description

Technical Field

[0001] The present invention relates to a reciprocating cutter head group, and more particularly to a reciprocating cutter head assembly for personal cleaning and care. Background Art

[0002] At present, the reciprocating cutter heads on the market generally cannot shave off body hairs of different lengths cleanly in one cut. Two sets of cutters are needed. One set of cutters first cuts the long hairs, and the other set shaves off the remaining short hairs. Equipping two cutter heads requires two cutting blades and corresponding driving mechanisms, which are not only heavy but also more prone to wear compared to standard single-purpose appliances. At the same time, the manufacturing and assembly costs are high. Also, operating this combined device requires switching between different modes, which is time-consuming, often complex to operate, and the experience is quite uncomfortable.

[0003] For the cutter head group itself, it generally includes a moving cutter and an outer cutter net. The outer cutter net, i.e., the outer mask, generally remains stationary, and the moving cutter head can reciprocate relative to the outer cutter net. For the cutter head, the main requirements are the cutting cleanliness, i.e., whether it can cut thoroughly, the cutting comfort, and the lifespan of the device, especially the cutter head. The first two require the outer cutter net to be as thin as possible. However, a thin outer cutter net has poor supporting force and is prone to breakage, with a short lifespan. Therefore, in general, the outer cutter net can only be made to a thickness of 15 filaments or even more than 15 filaments in order to balance the supporting force. Summary of the Invention

[0004] The purpose of the present invention is to provide a reciprocating cutter head group with a simple and reliable structure, sharpness, thorough cutting, and low cost in view of the defects existing in the prior art.

[0005] To achieve the above object, the present invention adopts the following technical solution: A reciprocating cutter head group includes a housing, a fixed blade, and a cutting moving blade adapted to the fixed moving blade and having a cutting edge. The fixed blade is integrally formed of a flexible metal sheet. The fixed blade includes a skin-friendly wall that faces the skin and has a plurality of first hair inlets during operation, two inwardly converging walls that form inwardly converging angles with both sides of the skin-friendly wall respectively, two connecting portions that are arc-connected to the two inwardly converging walls respectively and are arranged opposite to each other, and the two inwardly converging walls. The cross-section of the connecting portion is L-shaped. The two inwardly converging walls and the two connecting portions are sequentially connected downward from both sides of the skin-friendly wall and are arranged opposite to each other to form a receiving groove with a hat-shaped cross-section for setting the cutting moving blade. A mouth-corner type connecting structure in the shape of an outwardly convex "}" or "{" is formed between the skin-friendly wall and the inwardly converging wall. A plurality of second hair inlets are provided at the mouth-corner-shaped connection. At least a part of the horizontal plane with a free end of the two connecting portions is fixedly bonded and attached to the lower surface of a holding plate. The holding plate is made of a rigid material, and a guiding through hole extending horizontally and for a reciprocating transmission member to pass through is opened at the center of the holding plate.

[0006] As an improvement: It further includes a moving blade holder located below the cutting moving blade. The moving blade holder and the cutting moving blade are linked through a card slot fit. The card slot is away from the cutting edge of the cutting moving blade.

[0007] As an improvement: The reciprocating transmission component includes a driving head passing through a guiding through hole and connected to a power device, and a driving platform fixed on a driving seat to drive a moving tool rest or a moving tool to reciprocate. At least three sliding feet are provided on the lower bottom surface of the driving platform, and the driving platform is slidably elevated and supported on a holding plate by the sliding feet.

[0008] As an improvement: A bullet body is further provided below the moving tool rest. The bullet body includes a main body portion covering the driving platform, and a plurality of elastic flying wings stamped from the main body portion and upturned. The plurality of elastic flying wings are arranged horizontally or circumferentially on the main body portion, and an arc contact portion contacting the lower bottom surface of the moving tool rest is provided on the elastic flying wings.

[0009] As an improvement: The main body portion is provided with a surrounding edge corresponding to and in positioning cooperation with the driving platform.

[0010] As an improvement: A sinking groove corresponding to the elastic flying wings is formed on the driving platform to provide a deformation space for the elastic flying wings to press down.

[0011] As an improvement: The outwardly convex "}" or "{"-shaped mouth-corner connection structure includes a pursed mouth corner portion convex in the center, an upper lip transition portion extending from the corresponding side arc of the skin-friendly wall and sinking to the pursed mouth corner portion, and a lower lip transition portion extending from the corresponding side arc of the inwardly converging wall and rising to the pursed mouth corner portion.

[0012] As an improvement: The height of the vertical wall of the L-shaped connection portion is greater than the thickness of the holding plate, and the vertical walls of the two L-shaped connection portions respectively abut against both sides of the wide edge of the holding plate.

[0013] The reciprocating cutter head group of the present invention has the following advantages compared with the prior art:

[0014] 1. The fixed cutter blade in the present invention is integrally formed by a flexible metal sheet. The mouth-corner connection structure is formed between the skin-friendly wall and the inwardly converging wall, and the side is outwardly convex with a thickness similar to lamination, which can well support the skin-friendly wall. Especially for the arc-shaped skin-friendly wall, the rigidity of both sides is strengthened, the curvature change of the arc-shaped skin-friendly wall is greatly reduced, and the same curvature as the cutting moving tool below is maintained, improving the cutting stability. The fixed cutter blade can obtain a sufficient and stable cutting working surface without the support of other supporting parts, saving costs, having a compact structure and being convenient to use. Moreover, the mouth-corner connection divides the fixed cutter blade into an upper cutting skin-friendly area above the connection and a lower connection area below the connection in general. The partial deformation of the lower connection area is also blocked by the lamination-like structure at the connection, and the vibration generated by the reciprocating motion cannot be transmitted to the upper cutting skin-friendly area, greatly reducing the influence of the lower connection area on the upper cutting skin-friendly area, and users can have a more comfortable skin contact.

[0015] 2. The thickness of the fixed blade is as thin as less than 10 silk, even as thin as 4 - 5 silk, achieving an ultra-thin design that cannot be realized by other process structures. It not only has a higher sharpness of the cutter head group, shaves more cleanly, but also has sufficient supporting force to give it a longer lifespan. The arc-shaped skin-friendly wall has a higher comfort level, with no sharp corners or burrs on the surface, and a large area can be set for hair entry.

[0016] 3. The connecting part at the end of the fixed blade is L-shaped and is arranged opposite to each other. The horizontal plane at the end of the fixed blade is at least partially flatly fixed and combined on the lower surface of a holding plate by welding, riveting or pasting. Compared with the existing inclined surface fitting connection or clamping connection, this design makes the end of the fixed blade retract inward, with a smooth surface, hiding the sharp edges. Even if the fitting becomes uneven or some bonding points fail after long-term use, there are no sharp edges exposed, greatly avoiding the risk of skin cuts.

[0017] 4. The L-shaped connecting part and the holding plate can accurately obtain the height of the accommodating groove for installing the moving blade and its reciprocating transmission parts, facilitating the determination of the assembly position, enabling the unified cutter head group to have unified performance and reducing the assembly requirements. The connection between the fixed blade and the holding plate is far from the cutting area, and no hair clogging or dirt accumulation will form at the connection or the connection end, effectively avoiding the influence on the cutting efficiency and the problem of cleaning and hygiene.

[0018] 5. The holding plate is made of rigid material, which can not only provide sufficient support for the fixed blade and maintain the accommodating groove, but also the guiding through holes on it have a limiting effect on the reciprocating transmission components.

[0019] In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. Description of the Drawings

[0020] Figure 1 It is a schematic structural diagram of an embodiment of the reciprocating cutter head group of the present invention.

[0021] Figure 2 It is Figure 1 an exploded structural diagram.

[0022] Figure 3 It is a schematic internal structure diagram without the housing.

[0023] Figure 4 It is a schematic structural diagram of the accommodating groove. Detailed Embodiments

[0024] Such as Figure 1 、 Figure 2 、 Figure 3 、 Figure 4As shown, an embodiment of the reciprocating cutter head group of the present invention includes a housing 9, an arc-shaped fixed blade 1, a cutting moving blade 3 adapted to the fixed moving blade and having a cutting edge, a moving blade holder 4 located below the cutting moving blade 3, an elastic body 7 provided below the moving blade holder, a reciprocating transmission member 6, and a holding plate 2 made of a rigid material. The fixed blade 1 is integrally formed by a flexible metal thin sheet with a thickness of less than 10 filaments, even as thin as 4-5 filaments.

[0025] The fixed blade 1 includes a skin-friendly wall 11 that serves as the skin-facing side during operation and has a plurality of first hair inlets 111, two inwardly converging walls 12 that respectively form an inwardly converging angle with both sides of the skin-friendly wall, two connecting portions 13 that are respectively connected to the two inwardly converging walls in an arc shape and are arranged opposite to each other, and the two inwardly converging walls 12. The cross-section of the connecting portion 13 is L-shaped. The two inwardly converging walls 12 and the two connecting portions 13 are sequentially connected downward from both sides of the skin-friendly wall 11 and are arranged opposite to each other, forming a receiving groove 14 with a cap-shaped cross-section for setting the cutting moving blade 3. The holding plate 2 is connected to the notch of the receiving groove 14 to shape the receiving groove 14. A guiding through hole 21 that extends horizontally and allows the reciprocating transmission member 6 to pass through is opened in the center of the holding plate 2. Transverse positioning notches 22 are opened on both side edges of the holding plate 2, and transverse clamping holes 133 are also opened at corresponding positions of the L-shaped connecting portion 13. The housing 9 is provided with positioning posts 91 that cooperate with the transverse positioning notches 22 and the transverse clamping holes 133 to achieve transverse positioning.

[0026] In this embodiment, the height of the vertical wall 132 of the L-shaped connecting portion 13 is greater than the thickness of the holding plate 2. The connecting portion 13 is tightened inward so that the vertical walls 132 of the two L-shaped connecting portions 13 respectively abut against both wide sides of the holding plate 2. The assembly position is determined according to the distance between the two L-shaped connecting portions 13 and the width of the holding plate 2 to shape the receiving groove. The horizontal surfaces 131 with free ends of the two connecting portions 13 are completely flat and fixedly combined on the lower surface of a holding plate 2. The end of the fixed blade is hidden to avoid the sharp edge from cutting the skin. To further improve safety and prevent the relatively sharp end edge of the metal thin sheet from directly contacting the skin, the transverse two ends of the fixed blade in this embodiment are covered and fixed by both ends of the housing 9. Of course, it can also be hidden or covered by other transverse protection elements.

[0027] The lip-friendly wall 11 and the adduction wall 12 in this embodiment are connected in a mouth-corner type structure that is convex outward in the shape of "} " or "{". The mouth-corner type connection structure that is convex outward in the shape of "} " or "{ " includes a pursed mouth corner part 152 that is convex in the center, an upper lip transition part 154 that extends from the corresponding side edge of the lip-friendly wall 11 in a circular arc and sinks to the pursed mouth corner part, and a lower lip transition part 153 that extends from the corresponding side edge of the adduction wall in a circular arc and rises to the pursed mouth corner part. A plurality of second hair inlets 151 are provided on the mouth-corner type connection structure in this embodiment. The second hair inlets 151 extend from the lip-friendly wall 11 through the upper lip transition part, the pursed mouth corner part 152, and the lower lip transition part 153 to the adduction wall 12, which is not only conducive to the entry of long hairs, but also allows long curly hairs to enter easily. The pursed mouth corner part 152 obtains a laminated-like thickness, providing nearly twice the thickness rigidity support for the upper cutting lip-friendly area above the pursed mouth corner part 152. Relatively speaking, the thickness of the fixed blade can be reduced to about half of the existing metal thin-sheet fixed blade, which is a qualitative leap in terms of both sharpness and cutting efficiency. The upper lip transition part with a circular arc sink and the lower lip transition part 153 with a circular arc rise can also increase a certain supporting force and rigidity for the fixed blade, while ensuring that the surface has no sharp corners, allowing users to have a more comfortable skin contact. Cutting edges 31 corresponding to and cooperating with the first hair inlet 111 and the second hair inlet 151 are respectively provided on the cutting moving blade 3.

[0028] The cutting moving blade 3, the moving blade holder 4, the elastic body 7, and the reciprocating transmission member 6 are arranged in the accommodation groove from top to bottom. The moving blade holder 4 and the cutting moving blade 3 are linked through a slot cooperation away from the cutting edge 31 of the cutting moving blade 3. The moving blade holder 4 in this embodiment is of a flat plate type. Since the cutting moving blade 3 is an arc-shaped cutting moving blade adapted to the arc-shaped lip-friendly wall, the two side edges of the moving blade holder 4 are raised, and upper convex buttons 41 are provided on the raised edges. Slot holes adapted to the upper convex buttons are provided at the corresponding positions of the cutting moving blade 3, and stable linkage is achieved by a tightly fitted slot structure. The position and number of the slots can be designed away from the cutting area according to actual conditions. The designed moving blade holder 4 can not only be applicable to the arc-shaped cutting moving blade, but of course can also be used for the flat cutting moving blade, with better compatibility.

[0029] An elastic body 7 that presses the moving blade holder and the moving blade tightly against the lower surface of the fixed blade lip-friendly wall is arranged below the moving blade holder. The elastic body 7 includes a main body part 71 covering the driving platform 62 and two elastic wings 72 that are warped by stamping from the main body part 71. The two elastic wings 72 are arranged symmetrically in the horizontal direction on the main body part 71. The elastic wings 72 are provided with arc contact parts 721 that contact the lower bottom surface of the moving blade holder 4 to reduce heat conduction. The main body part 71 is provided with a surrounding edge corresponding to and positioning with the driving platform 62. The surrounding edge design can make the main body part 71 of the elastic body 7 firmly grasp on the driving platform 62, effectively avoiding situations such as looseness, shaking, and noise during reciprocating motion. The flat plate type design of the moving blade holder 4 and the elastic body 7 makes the structure in the entire accommodation groove more compact and the whole more miniaturized.

[0030] The reciprocating transmission component 6 includes a driving head 61 that passes through the guiding through-hole 21 and is connected to the power device, and a driving platform 62 that is fixedly connected to the driving seat 61 and drives the moving tool rest 4 or the moving tool to reciprocate. At least three sliding feet 63 are provided on the lower bottom surface of the driving platform 62. In this embodiment, four symmetrically arranged sliding feet are adopted for stability. The sliding feet 63 support the driving platform 62 in a slidable manner on the holding plate 2, minimizing the contact area to the greatest extent and reducing heat generation and power consumption. A sinking groove 621 corresponding to the elastic wing 72 is formed on the driving platform 62, which not only leaves a deformation space for the downward pressure of the elastic wing 72, but also guides the cut hair out through the sinking groove 621 to avoid the problem of hair clogging and jamming the elastic wing 72. In order to further reduce heat generation and power consumption in this embodiment, downwardly extending or directly injection-molded downward folding ear edges 23 are provided on the two side edges of the guiding through-hole 21. Convex ribs 611 that contact the downward folding ear edges are provided on the two outer side walls of the driving head 61. The top of the convex rib is an arc surface. The convex ribs greatly reduce the frictional resistance when the driving head reciprocates, thereby reducing the current required by the driving motor. At the same time, the temperature rise and noise are greatly reduced.

[0031] The cutter head group of the present invention can cut short hair and also cut and shave long curly hair with a single cutting tool. The fixed cutter blade is not easily deformed as a whole, has very high stability, a long service life, thus ensuring the cutting sharpness and safety of the reciprocating cutter head group.

[0032] Although the present invention has been disclosed above in specific embodiments, it is not intended to limit the present invention. Any person skilled in the art can still make some modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention should be determined by the scope defined in the appended claims.

Claims

1. A reciprocating cutter head group, comprising a housing (9), a fixed blade (1), and a cutting moving blade (3) adapted to the fixed blade and having a cutting edge, wherein the fixed blade (1) is integrally formed of a flexible metal sheet, and is characterized in that: The fixed blade (1) described above includes a skin-friendly wall (11) that serves as the skin-facing side during operation and has a plurality of first hair inlets (111), two converging walls (12) that form a converging angle with both sides of the skin-friendly wall respectively, and two connecting parts (13) that are arc-connected to the two converging walls and are arranged opposite to each other. The cross-section of the connecting part (13) is L-shaped. The two converging walls (12) and the two connecting parts (13) are sequentially connected downward from both sides of the skin-friendly wall (11) and are arranged opposite to each other to form a receiving groove (14) with a hat-shaped cross-section for setting the cutting moving blade (3). There is a mouth-corner connection structure that is convex outward in the shape of "}" or "{" between the skin-friendly wall (11) and the converging wall (12), and a plurality of second hair inlets (151) are provided on the mouth-corner connection structure. The horizontal surfaces (131) with free ends of the two connecting parts (13) are at least partially fixedly bonded to the lower surface of a holding plate (2). The holding plate (2) is made of a rigid material, and a guiding through hole (21) that extends horizontally and allows a reciprocating transmission member (6) to pass through is opened in the center of the holding plate (2). The mouth-corner connection structure includes a pursed mouth corner part (152) that is convex in the center, an upper lip transition part (154) that extends in an arc and sinks from the corresponding side of the skin-friendly wall (11) to the pursed mouth corner part, and a lower lip transition part (153) that extends in an arc and rises from the corresponding side of the converging wall (12) to the pursed mouth corner part. The height of the vertical wall (132) of the connecting part (13) is greater than the thickness of the holding plate (2), and the vertical walls (132) of the two connecting parts (13) respectively abut against both wide sides of the holding plate (2).

2. The reciprocating cutter head group according to claim 1, wherein: It further includes a moving blade holder (4) located below the cutting moving blade (3). The moving blade holder (4) and the cutting moving blade (3) are linked through a card slot fit, and the card slot is away from the cutting edge (31) of the cutting moving blade (3).

3. The reciprocating cutter head group according to claim 2, characterized in that: The reciprocating transmission member (6) includes a driving head (61) that passes through the guiding through hole (21) and is connected to a power device, and a driving platform (62) that is fixedly connected to the driving head (61) and drives the moving blade holder (4) or the cutting moving blade to move reciprocally. At least three sliding feet (63) are provided on the lower bottom surface of the driving platform (62), and the sliding feet (63) support the driving platform (62) in a slidable manner and raise it on the holding plate (2).

4. The reciprocating cutter head group according to claim 3, wherein: A spring body (7) is further provided below the moving blade holder. The spring body (7) includes a main body part (71) that covers the driving platform (62), and a plurality of elastic flying wings (72) that are upturned by stamping from the main body part (71). The plurality of elastic flying wings (72) are arranged horizontally or circumferentially on the main body part (71), and arc contact parts (721) that contact the lower bottom surface of the moving blade holder (4) are provided on the elastic flying wings (72).

5. The reciprocating cutter head group according to claim 4, characterized in that: The main body part (71) has a surrounding edge that corresponds to and is in positioning fit with the driving platform (62).

6. The reciprocating cutter head group according to claim 4 or 5, characterized in that: A sinking groove (621) corresponding to the elastic flying wings (72) is opened on the driving platform (62) to provide a deformation space for the elastic flying wings (72) to press down.

Images