Reciprocating metal tubular stationary blade

Abstract

A reciprocating metal tubular shaving tool includes a shaving body integrally formed from metal material. The shaving body extends in a tubular shape and is circumferentially closed, with an inner diameter ≤5mm. The shaving body has a shaving section, which has an outer peripheral surface on the outer wall of the shaving body and an arc-shaped shaving surface on the inner wall of the shaving body. The shaving section has multiple spaced-apart shaving tooth grooves, forming multiple shaving teeth on the shaving body. The shaving section has a main cutting area, which extends horizontally or is recessed towards the inner wall of the shaving body, causing the shaving teeth in the main cutting area to gradually thicken from the center to both sides. This tubular shaving tool is more suitable for shaving narrow, uneven skin areas and can remove shorter hairs.

Description

Technical Field

[0001] This utility model relates to personal care or medical shavers, and in particular to a metal tubular blade formed by stretching, welding or powder metallurgy. Background Technology

[0002] With the continuous development of society and the improvement of people's living standards, individuals are paying more and more attention to their appearance. As a result, various types of shavers have emerged, among which reciprocating shavers are particularly popular. Existing reciprocating shaver heads mainly consist of a stationary blade and a moving blade. The stationary blade has a hair inlet hole for guiding hair, while the moving blade is fixed to a moving blade holder that is synchronously linked with the drive mechanism. The high-speed rotation of the drive mechanism causes the moving blade holder to oscillate back and forth, which in turn causes the moving blade to move horizontally back and forth along the stationary blade to achieve shaving. However, when shaving some narrow and concave areas, such as pubic folds and underarm depressions, existing reciprocating shavers are limited by the skin folds and depressions, and hair can easily get stuck, resulting in difficulty shaving or an incomplete shave, leading to unsatisfactory shaving results. Summary of the Invention

[0003] In view of this, the present invention provides a reciprocating metal tubular stationary knife.

[0004] A reciprocating metal tubular stationary blade includes a stationary blade body made of metal. The stationary blade body extends in a tubular shape and is circumferentially closed. The inner diameter of the stationary blade body is ≤5mm. The stationary blade body has a stationary blade shearing section. The stationary blade shearing section has an outer peripheral surface located on the outer wall of the stationary blade body and an arc-shaped stationary blade cutting surface located on the inner wall of the stationary blade body. The stationary blade shearing section is provided with multiple spaced stationary blade tooth grooves, so that multiple stationary blade teeth are formed on the stationary blade body. The stationary blade shearing section has a main cutting area. The stationary blade teeth in the main cutting area gradually thicken from the middle to both sides.

[0005] Furthermore, the central angle N of the stationary blade cutting surface corresponding to the main cutting area is: 20°≤N≤80°.

[0006] Furthermore, comb teeth are formed on the stationary blade shearing section. The distance from the tip of the comb teeth to the center of the corresponding stationary blade body section is greater than the distance from any point on the outer circumference of the main cutting area to the center of that circle, so that the comb teeth protrude circumferentially relative to the stationary blade teeth of the main cutting area.

[0007] Furthermore, the static blade shearing section also includes two secondary cutting areas located on both sides of the main cutting area. The static blade teeth of the secondary cutting areas form a region that gradually thickens from the middle of the secondary cutting area to both sides. The comb teeth are arc-shaped and located between the main cutting area and the secondary cutting area.

[0008] Furthermore, the inner wall of the static blade body is provided with a partial recessed area in the non-main cutting area.

[0009] Furthermore, the end of the stationary blade body opposite to the main cutting area is the bottom of the stationary blade, and a through hole is provided at the bottom of the stationary blade to form a deburring hole.

[0010] Furthermore, the end of the stationary blade body opposite to the main cutting area is the bottom of the stationary blade, and a guide structure is provided at the bottom of the stationary blade. The guide structure limits the radial and circumferential offsets when the stationary blade reciprocates.

[0011] Furthermore, the outer peripheral surface of the main cutting area extends horizontally.

[0012] Furthermore, the outer peripheral surface of the main cutting area is concave towards the inner wall of the stationary blade body, the curvature of the outer peripheral surface is less than the curvature of the corresponding stationary blade cutting surface, and the bending direction of the outer peripheral surface is opposite to that of the stationary blade cutting surface.

[0013] Furthermore, the recessed areas are staggered in the non-main cutting area of ​​the inner wall of the stationary blade body.

[0014] The beneficial effects of this utility model are as follows: the tubular static blade described in this utility model is more suitable for shaving hair on narrow and uneven skin, and can remove shorter hairs for a cleaner shave; the static blade teeth in the main cutting area of ​​the static blade body gradually thicken from the middle to both sides, which can simultaneously satisfy the dual characteristics of removing short hairs and structural stability; the tubular static blade is easier to manufacture, product quality control is convenient, and the yield is high. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a perspective view of the tubular static knife;

[0017] Figure 2 for Figure 1 A perspective view of the tubular static knife shown from another direction;

[0018] Figure 3 This is a radial cross-sectional view of a tubular stationary cutter, showing the presence of a guide structure.

[0019] Figure 4 The structure is a tubular stationary knife that mates with a moving knife, showing that the inner wall of the tubular stationary knife has a recessed area;

[0020] Figure 5 It is another type of 3D image;

[0021] Figure 6 for Figure 5 A perspective view of the tubular static knife shown from another direction;

[0022] Figure 7 for Figure 5 A cross-sectional view of the central tubular stationary knife along the radial direction.

[0023] Figure label:

[0024] 1. Static blade body, 2. Static blade shearing part, 3. Outer peripheral surface, 4. Static blade cutting surface, 5. Static blade tooth groove, 6. Static blade tooth, 7. Main cutting area, 8. Comb teeth, 9. Tooth tip, 10. Center, 11. Secondary cutting area, 12. Recessed area, 13. Bottom of static blade, 14. Hair removal pore, 15. Guide structure. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] The present invention will now be further described with reference to the accompanying drawings.

[0027] This utility model provides the following technical solution:

[0028] As attached Figures 1-7 As shown, a reciprocating metal tubular stationary cutter is disclosed, including a stationary cutter body 1, which is integrally formed from metal material. Specifically, the stationary cutter body 1 can be formed by stretching, welding, or powder metallurgy die casting. The stationary cutter body 1 extends in a tubular shape and is circumferentially closed. Circumferential closure means that a portion of the tubular stationary cutter is circumferentially closed in the extension direction. The inner diameter of the stationary cutter body 1 is ≤5mm, and the wall thickness of the stationary cutter body 1 is ≤1mm. Integral forming means that the stationary cutter body is a one-piece closed tubular cutter.

[0029] like Figure 1-3 As shown, the stationary blade body 1 has a stationary blade shearing section 2, which has an outer peripheral surface 3 located on the outer wall of the stationary blade body 1 and an arc-shaped stationary blade cutting surface 4 located on the inner wall of the stationary blade body 1. The stationary blade shearing section 2 is provided with a plurality of spaced stationary blade tooth grooves 5 along the length direction of the stationary blade body 1, so that a plurality of stationary blade teeth 6 are formed on the stationary blade body 1.

[0030] The stationary blade shearing section 2 has a main cutting area 7, which extends horizontally to the outer peripheral surface 3 of the main cutting area 7 or is recessed towards the inner wall of the stationary blade body 1, so that the stationary blade teeth 6 of the main cutting area 7 gradually thicken from the middle to both sides. Figure 4 This shows an implementation where the outer peripheral surface 3 of the main cutting area 7 extends horizontally; Figure 7 The embodiment shown is in which the outer peripheral surface 3 of the main cutting area 7 is recessed towards the inner wall of the stationary blade body 1.

[0031] like Figure 7 As shown, when the outer peripheral surface 3 of the main cutting area is concave towards the inner wall of the stationary blade body 1, the curvature of the outer peripheral surface 3 is less than the curvature of the corresponding stationary blade cutting surface 4. Furthermore, the bending directions of the outer peripheral surface 3 and the stationary blade cutting surface 4 are opposite. This configuration not only allows for the use of thinner blades to cut shorter hairs, but also, because the curvature of the outer peripheral surface 3 is less than the curvature of the corresponding stationary blade cutting surface 4, and the two have opposite bending directions, opposite bending stresses are formed. When the hair to be cut is dense, the bending stress of the outer peripheral surface 3 and the bending stress of the stationary blade cutting surface 4 partially cancel each other out, reducing the deformation of the stationary blade when cutting dense hair, ensuring rapid hair cutting, significantly reducing temperature rise, and improving user comfort. Furthermore, the central angle N of the stationary blade cutting surface 4 corresponding to the main cutting area 7 is: 20°≤N≤80°. The angle N of the central angle of the main cutting area 7 can be changed during production according to different usage requirements. When the central angle is large, the thickness of the thinnest part of the stationary knife body 1 will be too thin, which will affect its use. Therefore, a central angle N ≤ 80° is more suitable.

[0032] like Figure 1 , 2 As shown in Figure 7, furthermore, comb teeth 8 are formed on the static blade cutting section 2. The distance from the tip of the comb teeth 8 to the center 10 of the corresponding cross-section of the static blade body 1 is greater than the distance from any point on the outer circumference of the main cutting area 7 to the center 10, so that the comb teeth 8 protrude circumferentially relative to the static blade teeth 6 of the main cutting area 7. That is to say, the comb teeth 8 protrude circumferentially relative to the static blade teeth 6 on the main cutting area 7. In this way, regardless of the direction or angle of use of the static blade, the comb teeth 8 can be used to guide and comb longer hairs before they are cut by the blade teeth on the main cutting area 7. This effectively avoids hair accumulation during shaving, which affects the cutting effect, and also avoids the occurrence of hair pulling, preventing the blade from deforming after long-term use of the shaver, thus improving the comfort of use.

[0033] like Figure 6 , 7As shown, the static blade shearing section 2 further includes two secondary cutting areas 11 located on both sides of the main cutting area 7. The static blade teeth 6 of the secondary cutting area 11 form a region that gradually thickens from the middle to both sides of the secondary cutting area 11. The comb teeth 8 are arc-shaped and located between the main cutting area 7 and the secondary cutting area 11. Specifically, the outer peripheral surface of the secondary cutting area 11 can be a plane or a curved surface. Similarly, the static blade teeth 6 of the secondary cutting area 11 form a region that gradually thickens from the middle to both sides of the secondary cutting area 11. With this configuration, multiple cutting areas are formed. When the blade teeth of the main cutting area 7 are not sharp enough, the secondary cutting area 11 can be used to remove hair, improving the utilization efficiency of the product. If the main cutting area 7 and the secondary cutting area 11 operate simultaneously in some confined spaces, the shaving efficiency can be further improved.

[0034] like Figure 4 , 7 As shown, the comb teeth 8 are formed between the main cutting area 7 and the secondary cutting area 11. The comb teeth 8 can guide long hair and prevent hair accumulation. (Refer to...) Figure 4 As shown, furthermore, the inner wall of the stationary blade body 1 has a recessed area 12 in the non-main cutting area. With this arrangement, during the reciprocating movement of the stationary blade body 1, the formed recessed area 12 reduces the friction surface between the moving and stationary blades, thereby reducing unnecessary current waste. This also eliminates unnecessary cutting surfaces, thus increasing the machine's working time and reducing blade friction temperature. To further enhance these effects, the recessed areas 12 can be staggered in the non-main cutting area of ​​the inner wall of the stationary blade body.

[0035] like Figure 2 , 6 As shown, the end of the stationary blade body 1 opposite to the main cutting area 7 is the stationary blade bottom 13, and the stationary blade bottom 13 is provided with a through hole to form a hair removal hole 14. The hair removal hole 14 ensures that the hair is quickly discharged, ensures that the hair enters the tooth groove smoothly, avoids hair accumulation and accelerated temperature rise, and improves the service life of the shaver.

[0036] like Figure 3 As shown, a guide structure 15 can also be provided at the bottom 13 of the stationary cutter body 1. The guide structure 15 limits the radial and circumferential offsets of the stationary cutter during reciprocating movement. The guide structure 15 can be a guide groove, a rib extending from the body, etc. Figure 3 For example, a guide groove is set at the bottom 13 of the stationary tool.

[0037] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A reciprocating metal tubular stationary knife, comprising a stationary knife body, characterized in that: The stationary blade body is integrally formed from metal material. The stationary blade body extends in a tubular shape and is circumferentially closed. The inner diameter of the stationary blade body is ≤5mm. The stationary blade body has a stationary blade shearing section. The stationary blade shearing section has an outer peripheral surface located on the outer wall of the stationary blade body and an arc-shaped stationary blade cutting surface located on the inner wall of the stationary blade body. The stationary blade shearing section is provided with multiple stationary blade tooth grooves arranged at intervals, so that multiple stationary blade teeth are formed on the stationary blade body. The stationary blade shearing section has a main cutting area. The stationary blade teeth in the main cutting area form a trend of gradually thickening from the middle to both sides.

2. The reciprocating metal tubular stationary knife according to claim 1, characterized in that: The central angle N of the static cutting surface corresponding to the main cutting area is: 20°≤N≤60°.

3. The reciprocating metal tubular stationary knife according to claim 1, characterized in that: The stationary blade shearing section has comb teeth formed on it. The distance from the tip of the comb teeth to the center of the corresponding stationary blade body section is greater than the distance from any point on the outer circumference of the main cutting area to the center of that circle, so that the comb teeth protrude circumferentially relative to the stationary blade teeth of the main cutting area.

4. The reciprocating metal tubular stationary knife according to claim 3, characterized in that: The static blade shearing section also includes two secondary cutting areas located on both sides of the main cutting area. The static blade teeth of the secondary cutting areas form a region that gradually thickens from the middle of the secondary cutting area to both sides. The comb teeth are arc-shaped and located between the main cutting area and the secondary cutting area.

5. The reciprocating metal tubular stationary knife according to claim 1, characterized in that: The inner wall of the static blade body has a partially recessed area in the non-main cutting area.

6. The reciprocating metal tubular stationary knife according to claim 1, characterized in that: The end of the stationary blade body opposite to the main cutting area is the bottom of the stationary blade, and a through hole is provided at the bottom of the stationary blade to form a hair removal hole.

7. The reciprocating metal tubular stationary knife according to claim 1, characterized in that: The end of the stationary blade body opposite to the main cutting area is the bottom of the stationary blade. A guide structure is provided at the bottom of the stationary blade, which limits the radial and circumferential offsets when the stationary blade reciprocates.

8. The reciprocating metal tubular stationary knife according to claim 1, characterized in that: The outer peripheral surface of the main cutting area extends horizontally.

9. The reciprocating metal tubular stationary knife according to claim 1, characterized in that: The outer peripheral surface of the main cutting area is concave towards the inner wall of the stationary blade body. The curvature of the outer peripheral surface is less than the curvature of the corresponding stationary blade cutting surface, and the curvature direction of the outer peripheral surface is opposite to that of the stationary blade cutting surface.

10. The reciprocating metal tubular stationary knife according to claim 5, characterized in that: The recessed areas are staggered in the non-main cutting area of ​​the inner wall of the stationary blade body.

Images