A razor cartridge

Abstract

The utility model discloses a razor screen, including screen body, the top of screen body's net is equipped with the recessed groove of going down inside concave in the middle part, is fixed with the patch in the recessed groove, the outer edge of patch top surface and the upper edge of recessed groove are flush or basically flush in the up and down direction, the recessed groove has the groove wall of cooperation with the side of patch for positioning the patch, the included angle m between the groove wall of recessed groove and central axis OA is less than 10, the groove wall of recessed groove and the top surface of net top are without chamfer or are equipped with first chamfer, the width R of first chamfer is less than or equal to 0.20mm, the included angle n between the side of patch and central axis OA is less than 10, and the second chamfer is equipped without chamfer or between the side of patch and the top surface, and the width R2 of second chamfer is less than or equal to 0.30mm, can avoid forming the step or recess of easily blocking the skin movement at the connecting place of patch and recessed groove, improves the skin feeling and comfort when shaving.

Description

[Technical Field]

[0001] This utility model relates to a razor blade mesh. [Background Technology]

[0002] The foil of a rotary shaver is generally formed by stamping sheet metal. It typically has a recessed groove stamped on the top for mounting the shaver pad. The foil is usually made of sheet metal with a thickness of about 0.5mm. During bending and stretching, rounded corners are formed at the bends in the material. These rounded corners are divided into inner and outer rounded corners. Generally, the outer rounded corner equals the inner rounded corner plus the material thickness. Therefore, when the groove is formed downwards from the top of the foil, there is a large outer rounded corner between the groove wall and the top surface of the foil. Furthermore, because the groove needs a certain depth during stamping, after the shaver pad is installed in the groove, the pad is often significantly lower than the groove depth. This usually creates a large gap (a) and / or a step (b) between the outer rounded corner and the pad. Figures 6a-6b As shown, when the top surface of the foil moves close to the skin, the skin is prone to arching into the gap, creating obvious obstruction or being obstructed by the step, causing obvious undulations in the skin and affecting the feel and comfort of shaving.

[0003] This utility model was made based on this situation. [Utility Model Content]

[0004] The technical problem to be solved by this utility model is to provide a razor foil with a simple structure and comfortable feel.

[0005] This utility model is achieved through the following technical solution:

[0006] A razor foil includes a foil body. The foil body has a downwardly recessed groove at the center of its top. A patch is fixed in the groove. The outer edge of the patch's top surface is flush with or substantially flush with the upper edge of the groove in the vertical direction. The groove has a groove wall that mates with the side of the patch for positioning it. The angle m between the groove wall and the central axis OA is less than 10°. There is no chamfer between the groove wall and the top surface of the foil, or a first chamfer is provided, with the width R ≤ 0.20 mm. The angle n between the side of the patch and the central axis OA is less than 10°. There is no chamfer between the top surface and the side of the patch, or a second chamfer is provided, with the width R2 ≤ 0.30 mm.

[0007] In the razor foil described above, the height difference h between the outer edge of the top surface of the patch and the upper edge of the groove in the vertical direction satisfies: -0.10mm≤h≤0.10mm.

[0008] In the razor foil described above, the height difference h between the outer edge of the top surface of the patch and the upper edge of the groove in the vertical direction satisfies: -0.05mm≤h≤0.05mm.

[0009] As described above, in a razor foil, the included angle m between the groove wall and the central axis OA is ≤5°, and a first chamfer is provided between the groove wall and the top surface of the foil, the width of the first chamfer being ≤0.10mm.

[0010] As described above, in a razor foil, the included angle n ≤ 3° between the side of the patch and the central axis OA, and a second chamfer is provided between the top surface and the side surface of the patch, the width of the second chamfer R2 ≤ 0.10mm.

[0011] In the razor foil described above, the gap between the side of the patch and the groove wall is less than 0.10 mm.

[0012] As described above, the razor foil body and the groove are integrally formed by powder metallurgy.

[0013] As described above, in a razor foil, the patch is a regular polygonal structure, and the groove wall of the groove forms a regular polygonal structure that matches the patch; or the patch is a flower-shaped structure formed by multiple arcs around the circumference, and the groove wall of the groove forms a flower-shaped structure that matches the patch.

[0014] As described above, in a razor blade foil, the top surface of the patch is an upwardly convex spherical surface, and the bottom of the patch is upwardly concave and forms an adhesive space with the bottom of the groove.

[0015] As described above, in a razor foil, the top of the foil body is provided with an inner shaving ring on the outside of the groove, and the inner shaving ring is provided with a hair inlet hole, the inner end of which does not connect inward to the groove.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] The razor foil of this utility model has an outer edge of the top surface of the patch that is flush or substantially flush with the upper edge of the groove in the vertical direction. The groove has a groove wall that cooperates with the side surface of the patch to position the patch. The groove wall and the top surface of the foil have no chamfer or have a first chamfer, the width of the first chamfer R1≤0.20mm. The included angle n between the side surface of the patch and the central axis OA is less than 10°. The top surface and the side surface of the patch have no chamfer or have a second chamfer, the width of the second chamfer R2≤0.30mm. By having the outer edge of the top surface of the patch flush or substantially flush with the upper edge of the groove in the vertical direction, and by defining the shape of the connection between the patch and the groove through the included angle m, the chamfer shape between the groove wall and the top surface of the foil, the included angle n, and the chamfer shape between the top surface and the side surface of the patch, the shape of the connection between the patch and the groove is defined. This avoids the formation of steps that easily obstruct skin movement or depressions that easily allow skin to be squeezed into at the connection between the patch and the groove, thereby improving the smoothness of the top of the foil moving on the skin during shaving and improving skin feel and comfort. [Attached Image Description]

[0018] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, wherein:

[0019] Figure 1 This utility model relates to a razor blade mesh. Figure 2 Sectional view along direction II;

[0020] Figure 1a yes Figure 1 A magnified view of a section at point A in the middle;

[0021] Figure 1b This is a schematic diagram of an embodiment in which there is no chamfer between the top surface of the groove wall and the top of the mesh, and no chamfer between the top surface and the side surface of the patch;

[0022] Figure 2 This is a top view of a razor blade mesh according to the present invention;

[0023] Figure 3 This is a cross-sectional view of another embodiment of the razor blade mesh of this utility model;

[0024] Figure 3a yes Figure 1 A magnified view of a section at point B in the middle;

[0025] Figure 4 This is a schematic diagram of the structure of a razor blade with a regular polygonal patch according to the present invention;

[0026] Figure 5 This is a schematic diagram of the structure of a razor blade with flower-shaped patches according to the present invention;

[0027] Figures 6a-6b This is a schematic diagram of the structure of a razor blade with a patch in the prior art. 【Detailed Implementation Methods】

[0028] The present invention will be further described below with reference to the accompanying drawings:

[0029] like Figures 1 to 5 The razor foil shown includes a foil body 1. A downwardly recessed groove 3 is provided in the center of the foil top 2 of the foil body 1. A patch 4 is fixed in the groove 3. The outer edge 41 of the top surface of the patch 4 is flush or substantially flush with the upper edge 31 of the groove 3 in the vertical direction. The groove 3 has a groove wall 32 that cooperates with the side surface of the patch 4 for positioning the patch 4. The angle m between the groove wall 32 and the central axis OA is less than 10°. There is no chamfer between the groove wall 32 and the top surface of the foil top 2, or a first chamfer 33 is provided, with the width R1 ≤ 0.20 mm. The angle n between the side surface of the patch 4 and the central axis OA is less than 10°. There is no chamfer between the top surface and the side surface of the patch 4, or a second chamfer 42 is provided, with the width R2 ≤ 0.30 mm.

[0030] By ensuring that the outer edge 41 of the top surface of the patch 4 is flush or substantially flush with the upper edge 31 of the groove 3 in the vertical direction, and by defining the shape of the connection between the patch 4 and the groove 3 through the included angle m, the chamfer shape between the groove wall 32 and the top surface of the mesh top 2, the included angle n, and the chamfer shape between the top surface and the side surface of the patch 4, the shape of the connection between the patch 4 and the groove 3 is defined. This avoids the formation of steps that easily obstruct skin movement or depressions that easily allow skin to arch in at the connection between the patch 4 and the groove 3, thereby improving the smoothness of the top of the razor mesh on the skin during shaving and improving skin feel and comfort.

[0031] like Figure 1b As shown, when there is no chamfer between the groove wall 32 and the top surface of the mesh top 2, the upper edge 31 of the groove 3 refers to the edge where the groove wall 32 and the top surface of the mesh top 2 intersect; as Figure 1a and 3a As shown, when a first chamfer is provided between the groove wall 32 of the groove 3 and the top surface of the mesh top 2, the upper edge 31 of the groove 3 refers to the edge where the first chamfer 33 intersects with the top surface of the mesh top 2. Figure 1b As shown, when there is no chamfer between the top surface and the side surface of the patch 4, the outer edge 41 of the top surface of the patch 4 refers to the edge where the top surface and the side surface of the patch 4 intersect; as Figure 1a and 3a As shown, when a second chamfer is provided between the top surface and the side surface of the patch 4, the outer edge 41 of the top surface of the patch 4 refers to the edge where the top surface of the patch 4 and the second chamfer 42 intersect.

[0032] Preferably, the blade mesh body 1 and the groove 3 are integrally formed by powder metallurgy, which has a simple structure and is conducive to forming the groove 3 and the groove wall 32 that matches the side of the patch 4. It is also conducive to making the groove wall 32 of the groove 3 and the top surface of the mesh top 2 without chamfer or to making the first chamfer 33 smaller. It is also conducive to controlling the depth of the groove, so that the outer edge 41 of the top surface of the patch 4 and the upper edge 31 of the groove 3 are flush or basically flush in the vertical direction.

[0033] For the outer edge 41 of the top surface of the patch 4 and the upper edge 31 of the groove 3 to be flush or substantially flush in the vertical direction, it means that the outer edge 41 of the top surface of the patch 4 and the upper edge 31 of the groove 3 are at the same height or close in height. Preferably, such as... Figure 1a and 3a As shown, the height difference h between the outer edge 41 of the top surface of the patch 4 and the upper edge 31 of the groove 3 in the vertical direction satisfies: -0.10mm≤h≤0.10mm. The height difference is small, and the skin is not easily aware of it, thus avoiding affecting the skin feel. Furthermore, the height difference h between the outer edge 41 of the top surface of the patch 4 and the upper edge 31 of the groove 3 in the vertical direction satisfies: -0.05mm≤h≤0.05mm.

[0034] Preferably, such as Figure 1a , 1b In the embodiment shown in 3a, the angle m between the groove wall 32 of the groove 3 and the central axis OA is ≤5°, and the angle n between the side surface of the patch 4 and the central axis OA is ≤3°; preferably, as shown in 3a... Figure 1a In the embodiment shown, a first chamfer 33 is provided between the groove wall 32 of the groove 3 and the top surface of the mesh top 2, and the width of the first chamfer 33 R1≤0.10mm; a second chamfer 42 is provided between the top surface and the side surface of the patch 4, and the width of the second chamfer 42 R2≤0.10mm, so that the transition between the top surface of the patch 4 and the top surface of the mesh top 2 is smoother and has a better skin feel.

[0035] Preferably, the gap between the side of the patch 4 and the groove wall 32 of the groove 3 is less than 0.10 mm, which facilitates the installation of the patch 4 into the groove 3, and at the same time makes the gap between the side of the patch 4 and the groove wall 32 of the groove 3 smaller, and the transition between the top surface of the patch 4 and the top surface of the mesh 2 is smoother.

[0036] Preferably, the top surface of the patch 4 is an upwardly convex spherical surface, which can provide good support for the skin and improve the skin feel during shaving. The bottom of the patch 4 is upwardly concave and forms an adhesive space 5 with the bottom of the groove 3, which is used to hold adhesive to stick and fix the patch 4 in the groove 3.

[0037] Preferably, the top 2 of the razor body 1 is provided with an inner shaving ring 6 outside the groove 3. The inner shaving ring 6 is provided with a hair inlet hole 7. The inner end of the hair inlet hole 7 does not connect inward to the groove 3, so that the top surface of the inner shaving ring 6 has a continuous skin contact surface 61 surrounding the outer side of the patch 4 inside the hair inlet hole 7. Since it is not easy for the skin to poke in and form a skin barrier at the connection between the patch 4 and the groove 3, the skin contact surface 61 and the top surface of the patch 4 are connected to form a smooth skin contact area, which improves the skin feel and comfort.

[0038] exist Figure 1a In implementation, the height difference h between the outer edge 41 of the top surface of the patch 4 and the upper edge 31 of the groove 3 in the vertical direction satisfies: -0.05mm≤h≤0.05mm; the included angle m between the groove wall 32 of the groove 3 and the central axis OA is ≤5°; the included angle n between the side surface of the patch 4 and the central axis OA is ≤3°; the width R1 of the first chamfer 33 is ≤0.10mm; the width R2 of the second chamfer 42 is ≤0.10mm; and the gap between the side surface of the patch 4 and the groove wall 32 of the groove 3 is less than 0.10mm, so that the transition between the top surface of the inner shaving ring 6 and the top surface of the patch 4 has good continuity, and the shaving experience is good and comfortable.

[0039] The groove 3 is formed by powder metallurgy, and its shape can be circular or other shapes such as... Figure 4 The regular polygon shown or as Figure 5 The flower shape shown is to facilitate the installation of the patch in a specific orientation, such as... Figure 4 In the illustrated embodiment, the patch 4 has a regular polygonal structure, and the groove wall 32 of the groove 3 forms a regular polygonal structure that mates with the patch 4; or, as shown... Figure 5 In the embodiment shown, the patch 4 is a flower-shaped structure formed by multiple arcs around the circumference, and the groove wall 32 of the groove 3 forms a flower-shaped structure that matches the patch 4.

Claims

1. A shaving razor cartridge, characterized by: The invention discloses a razor net body (1), the middle part of the net top (2) of the razor net body (1) is provided with a downwardly concave groove (3), a patch (4) is fixed in the groove (3), the outer edge (41) of the top surface of the patch (4) is flush or substantially flush with the upper edge (31) of the groove (3) in the up-down direction, the groove (3) has a groove wall (32) cooperating with the side surface of the patch (4) for positioning the patch (4), the included angle m between the groove wall (32) of the groove (3) and the center axis (OA) is less than 10°, the groove wall (32) of the groove (3) and the top surface of the net top (2) are not chamfered or are provided with a first chamfer (33), the width R1 of the first chamfer (33) is less than or equal to 0.20mm, the included angle n between the side surface of the patch (4) and the center axis (OA) is less than 10°, the top surface and the side surface of the patch (4) are not chamfered or are provided with a second chamfer (42), the width R2 of the second chamfer (42) is less than or equal to 0.30mm.

2. A razor cartridge according to claim 1 wherein: The height difference h of the outer edge (41) of the top surface of the patch (4) and the upper edge (31) of the groove (3) in the up-down direction satisfies: -0.10mm≤h≤0.10mm.

3. A razor cartridge according to claim 2, characterized in that: The height difference h of the outer edge (41) of the top surface of the patch (4) and the upper edge (31) of the groove (3) in the up-down direction satisfies: -0.05mm≤h≤0.05mm.

4. A razor cartridge according to claim 2, characterized in that: The included angle m between the groove wall (32) of the groove (3) and the center axis (OA) is less than or equal to 5°, the groove wall (32) of the groove (3) and the top surface of the net top (2) are provided with a first chamfer (33), the width R1 of the first chamfer (33) is less than or equal to 0.10mm.

5. A razor cartridge according to claim 4, characterized in that: The included angle n between the side surface of the patch (4) and the center axis (OA) is less than or equal to 3°, the top surface and the side surface of the patch (4) are provided with a second chamfer (42), the width R2 of the second chamfer (42) is less than or equal to 0.10mm.

6. A razor cartridge according to any one of claims 1 to 5 wherein: The gap between the side surface of the patch (4) and the groove wall (32) of the groove (3) is less than 0.10mm.

7. A razor cartridge according to any one of claims 1 to 5 wherein: The razor net body (1) and the groove (3) are integrally formed by powder metallurgy.

8. A razor cartridge according to claim 7, characterized in that: The patch (4) is a regular polygon structure, the groove wall (32) of the groove (3) surrounds a regular polygon structure cooperating with the patch (4); or the patch (4) is a flower-shaped structure surrounded by multiple circular arcs in the circumferential direction, and the groove wall (32) of the groove (3) surrounds a flower-shaped structure cooperating with the patch (4).

9. A razor cartridge according to any one of claims 1 to 5, 8 wherein: The top surface of the patch (4) is an upwardly convex spherical surface, and the bottom of the patch (4) is upwardly concave and forms a glue space (5) with the groove bottom of the groove (3).

10. A razor cartridge according to any one of claims 1 to 5, 8 wherein: The net top (2) of the razor net body (1) is provided with an inner shaving ring (6) outside the groove (3), the inner shaving ring (6) is provided with a hair inlet hole (7), and the inner end of the hair inlet hole (7) does not communicate inwardly into the groove (3).

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