Razor head

Description

FIELD OF THE INVENTION

[0001] The present invention relates to the technical field of shaving, and more particularly to a razor head.BACKGROUND OF THE INVENTION

[0002] With improvement of the economy and the society, abounding consumables are offered to people to satisfy people's demand, thereby improving people's standard or living. Razors are one of these consumables.

[0003] As shown in FIG. 5, for a manual razor, a razor head 300 includes a razor head frame 310 and blades 320. The razor head frame 310 includes a front side wall 310a, a rear side wall 310b, and a connecting side wall 310c connecting the front side wall 310a to the rear side wall 310b. In addition, the front side wall 310a, the rear side wall 310b and the connecting side wall 310c together define an accommodating space 310d, and the blades 320 are arranged in the accommodating space 310d. Specifically, cutting edges 321 of the blades 320 face the front side wall 310a, and a top surface of the front side wall 310a is provided with a skin contact portion 311 that contacts the skin during shaving. The height of the skin contact portion 311 decreases from the back to the front of the razor head frame 310 to ensure that the cutter head 300 can slide along user's skin more smoothly during shaving. Since the height of the skin contact portion 311 decreases from the back to the front of the razor head frame 310, the highest point N of the skin contact portion 311 is disposed backward to be close to the cutter edges 321. Thus, a distance D' between the highest point N and the cutter edges 321 is reduced, the skin 200 pressed by the highest point N of the skin contact portion 311 and the cutter edges 321 will be greatly arched during shaving. Because the skin 200 is arched greatly, the angle β between the cutter edges 321 and the arched skin 200 is smaller, so the skin is more easily scratched, and therefore, the shaving comfort is worse. Further, EP3453499A1 discloses a shaving razor including a cartridge including a housing having a front portion and a rear portion, a guard at the front portion of said housing and a cap at the rear portion of the housing and a blade array located in-between the guard and cap.

[0004] Therefore, there is a need for a razor head that improves shaving comfort and has good shaving effect to overcome the above-mentioned drawbacks.SUMMARY OF THE INVENTION

[0005] One objective of the present invention is to provide a razor head that improves shaving comfort and has good shaving effect.

[0006] To achieve the above-mentioned objective, a razor head is provided, which includes a razor head frame and a razor blade. The razor head frame includes a front side wall, a rear side wall and a connecting side wall connected to the front side wall and the rear side wall. The connecting side wall, the front side wall and the rear side wall together enclose an accommodating space, the razor blade is located in the accommodating space, and a blade edge of the razor blade faces the front side wall. A rear part of the front side wall adjacent to the blade edge is provided with a first skin contact portion, and a front part of the front side wall away from the blade edge is provided with a second skin contact portion. A highest point of the second skin contact portion is higher than a highest point of the first skin contact portion. The highest point of the first skin contact portion is higher than the blade edge, and the highest point of the first skin contact portion is located below a plane jointly defined by the highest point of the second skin contact portion and the blade edge. The second skin contact portion has an arc-shaped structure with a convex middle portion along a front-rear direction of the razor head frame.

[0007] Preferably, the razor head further includes a protective structure, the protective structure is arranged for covering the front part of the front side wall, and the second skin contact portion is formed around a highest point of the protective structure.

[0008] According to the claimed invention, the second skin contact portion has an arc-shaped structure with a convex middle portion along a front-rear direction of the razor head frame.

[0009] Preferably, an outer contour of a cross section of the second skin contact portion is an arc, and the height of the arc increases first and then decreasing gradually along the front-rear direction of the razor head frame.

[0010] Preferably, a rear end of the arc adjacent to the first skin contact portion is extended and then intersects the first skin contact portion.

[0011] Preferably, the razor head further includes a lubrication strip mounted on the rear side wall, and the lubrication strip has a third skin contact portion whose highest point is lower than the blade edge.

[0012] Preferably, the razor head has at least two razor blades, and the razor blades are spaced side by side along the front-rear direction of the razor head frame. The highest point of the second skin contact portion and the blade edge of the razor blade adjacent to the first skin contact portion together defines the plane.

[0013] Preferably, a cross section of the first skin contact portion is a straight line segment.

[0014] Preferably, an intersection of the part of the front side wall for defining the accommodating space and the first skin contact portion is a round-chamfered structure.

[0015] Preferably, the straight line segment is tangent to an outer contour of a cross section of the round-chamfered structure.

[0016] In comparison with the prior art, the protective structure covers the front part of the front side wall away from the blade edge, and the rear part of the front side wall adjacent to the blade edge is the bare first skin contact portion that can contact with the skin. The second skin contact portion that can contact the skin is defined around the highest point of the protective structure. The highest point of the second skin contact portion is higher than the highest point of the first skin contact portion. The highest point of the first skin contact portion is higher than the blade edge, and the highest point of the first skin contact portion is also located below the plane jointly defined by the highest point of the second skin contact portion and the blade edge. Therefore, during shaving, the blade edge and the highest point of the second skin contact portion press against the skin, and the skin length between the blade edge and the highest point of the second skin contact portion is extended. Correspondingly, deformation amount of the skin between the blade edge and the highest point of the second skin contact portion is reduced. Furthermore, the highest point of the first skin contact portion is also located below the plane jointly defined by the highest point of the second skin contact portion and the blade edge, so the highest point of the first skin contact portion properly supports the skin between the blade edge and the highest point of the second skin contact portion, and the first skin contact portion makes sure the skin supported is higher than the blade edge. Therefore, the angle between the blade edge and the arched skin is increased thereby reducing skin scratch and improving shaving comfort.BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings facilitate an understanding of the various embodiments of this invention. In such drawings: Fig. 1 is a cross-sectional view of the razor head according to an embodiment of the present invention for showing the internal structure of the razor head; Fig. 2 is a schematic view to show use state of the razor head in which the razor head in Fig. 1 is in contact with the skin during shaving; Fig. 3 is a schematic view to show the force point and the contact distance when the razor head in Fig. 2 is in contact with the skin during shaving; Fig. 4 is a cross-sectional view of the razor head according to another embodiment of the present invention for showing the internal structure of the razor head; and Fig. 5 is a schematic view to show use state of the existing razor head in which the existing razor head is in contact with the skin during shaving. DETAILED DESCRIPTION OF ILLUSTRATED EMBODIMENTS

[0018] A distinct and full description of the technical solution of the present invention will follow by combining with the accompanying drawings.

[0019] As shown in Fig. 1, a razor head 100 according to an embodiment of the present application includes a razor head frame 10, a razor blade 20 and a protective structure 30. The razor head frame 10 includes a front side wall 10a, a rear side wall 10b and a connecting side wall 10c connected to the front side wall 10a and the rear side wall 10b. The connecting side wall 10c, the front side wall 10a and the rear side wall 10b together enclose an accommodating space 10d. Preferably, the connecting side wall 10c, the front side wall 10a and the rear side wall 10b together to form an integrated structure, for example, but it is not limited to make them form the integrated structure by the injection molding process, so the connecting side wall 10c, the front side wall 10a and the rear side wall 10b are inseparable, which increases the strength of the razor head frame 10 on the one hand and facilitates the manufacture of the razor head frame 10 on the other hand. The razor blade 20 is located in the accommodating space 10d which provides a space for installation and work of the razor blade 20. A blade edge 21 of the razor blade 20 faces the front side wall 10a.

[0020] Specifically, the protective structure 30 covers a front part of the front side wall 10a away from the blade edge 21. Preferably, as shown in Fig. 1, an outer contour of a cross section of the front part has a horizontal line segment and a vertical line segment on the left, has an arc segment in the middle, and has a horizontal line segment on the right, but not limited to this. Specifically, the protective structure 30 covers the front part of the front side wall 10a in various ways. For example, the protective structure 30 can be integrally formed with the front side wall 10a by injection molding, or fixed with the front side wall 10a by gluing, or fixed with the front side wall 10a by ultrasonic welding, so that the protective structure 30 covers the front part of the front side wall 10a, but not limited thereto. A rear part of the front side wall 10a adjacent to the blade edge 21 forms an exposed first skin contact portion 11 that can be in contact with the skin, and a second skin contact portion 30a that will be in contact with the skin is formed around a highest point A of the protective structure 30. Understandably, the highest point of the protective structure 30 and a highest point of the second skin contact portion 30a are the same. The highest point A of the second skin contact portion 30a is higher than a highest point E of the first skin contact portion 11, and the highest point E of the first skin contact portion 11 is higher than the blade edge 21. The highest point E of the first skin contact portion 11 is also located below a plane P jointly defined by the highest point A of the second skin contact portion 30a and the blade edge 21, as shown in Fig. 1. Specifically, the razor head 100 further includes a lubrication strip 40 mounted on the rear side wall 10b. Preferably, cross-section of the lubrication strip 40 is "T" shape, and the lubrication strip 40 has a third skin contact portion 41 whose highest point F is lower than the blade edge 21, which increases shaving comfort, as shown in Fig. 1. It should be noted that, in Fig. 1, H1 represents the height where the blade edge 21 is located, and H2 represents the height where the highest point F of the third skin contact portion 41 is located.

[0021] Please refer to Fig. 1 again, the second skin contact portion 30a has an arc-shaped structure with a convex middle portion along a front-rear direction of the razor head frame 10. Preferably, an outer contour of a cross section of the second skin contact portion 30a is an arc 31, and the height of the arc 31 increases first and then decreases gradually along the front-rear direction of the razor head frame 10. In other words, the height of the arc 31 increases first and then decreases gradually from a rear end B adjacent to the first skin contact portion 11 to a front end C away from the first skin contact portion 11. Such an arrangement enables the skin to slide more smoothly along the second skin contact portion 30a to the blade edge 21 during shaving, with less resistance. More specifically, the arc 31 is adjacent to an extension line 32 of the first skin contact portion 11 (the extension line 32 is shown by a dotted line in a partial enlarged view of Fig. 1) and intersects the first skin contact portion 11, so that the first skin contact portion 11 can properly support the skin 200 pressed between the second skin contact portion 30a and the blade edge 21. The skin 200 between the second skin contact portion 30a and the blade edge 21 is less arched, so the skin 200 is less scratched, as shown in Figs. 2 and 3.

[0022] As shown in Figs. 1 to 3, at least two razor blades 20 are arranged side by side at a distance along the front-rear direction of the razor head frame 10. The highest point A of the second skin contact portion 30a and the blade edge 21 of the razor blade 20 adjacent to the first skin contact portion 11 together defines the plane P, so as to improve shaving efficiency by means of the plurality of razor blades 20.

[0023] As shown in Fig. 1, a cross section of the first skin contact portion 11 is a straight segment 11a. An intersection of the part 12 of the front side wall 10a used to define the accommodating space 10d and the first skin contact portion 11 is a round-chamfered structure 13. Preferably, the straight line segment 11a is tangent to an outer contour of a cross section of the round-chamfered structure 13 to ensure that the skin 200 slides toward the blade edge 21 more smoothly.

[0024] In comparison with the prior art, the protective structure 30 covers the front part of the front side wall 10a away from the blade edge 21, and the rear part of the front side wall 10a adjacent to the blade edge 21 is the bare first skin contact portion 11 that can contact with the skin. The second skin contact portion 30a that can contact the skin is formed around the highest point A of the protective structure 30. The highest point A of the second skin contact portion 30a is higher than the highest point E of the first skin contact portion 11. The highest point E of the first skin contact portion 11 is higher than the blade edge 21. Furthermore, the highest point E of the first skin contact portion 11 is also located below the plane P jointly defined by the highest point A of the second skin contact portion 30a and the blade edge 21. Therefore, during shaving, the skin 200 is pressed against the highest point A of the second skin contact part 30a and the blade edge 21, and the distance D of the skin 200 between the blade edge 21 and the highest point A of the second skin contact part 30a is extended (see Fig. 3). Namely the distance D is greater than D' shown in Fig. 5. Correspondingly, deformation amount of the skin 200 between the blade edge 21 and the highest point A of the second skin contact portion 30a is reduced. Furthermore, the highest point E of the first skin contact portion 11 is also located below the plane P jointly defined by the highest point A of the second skin contact portion 30a and the blade edge 21, so the highest point E of the first skin contact portion 11 properly supports the skin 200 between the blade edge 21 and the highest point A of the second skin contact portion 30a, and the first skin contact portion 11 makes sure the skin 200 supported is higher than the blade edge 21. Therefore, the angle α between the blade edge 21 and the arched skin 200 is increased, and the angle α is greater than the angle β shown in Fig. 5, thereby reducing skin scratch and improving shaving comfort.

[0025] As shown in Fig. 4, another embodiment of a razor head 100 is shown. The protective structure 30 in Fig. 1 is integrated with the front side wall 10a to form the front side wall 10a' of the razor head frame 10 in this new embodiment, and other structures are the same as the razor head 100 described above. Therefore, as shown in Fig. 4, in the new embodiment, the razor head 100' includes the razor head frame 10' and the razor blade 20. The razor head frame 10' includes a front side wall 10a', a rear side wall 10b, a connecting side wall 10c connected to the front side wall 10a' and the rear side wall 10b. The connecting side wall 10c, the front side wall 10a' and the rear side wall 10b jointly enclose the accommodating space 10d. The razor blade 20 is located in the accommodating space 10d, and the blade edge 21 of the razor blade 20 faces the front side wall 10a'. The rear part of the front side wall 10a' adjacent to the blade edge 21 has a first skin contact portion 11 that can contact with the skin, and the front part of the front side wall 10a' away from the blade edge 11 has a second skin contact portion 30a that can contact the skin. The highest point A of the second skin contact portion 30a is higher than the highest point E of the first skin contact portion 11, the highest point E of the first skin contact portion 11 is higher than the blade edge 21, and the highest point E of the first skin contact portion 11 is also located below the plane P jointly defined by the highest point A of the second skin contact portion 30a and the blade edge 21.

[0026] While the invention has been described in connection with what are presently considered to be the most practical and preferred embodiments, it is to be understood that the invention is not to be limited to the disclosed embodiments, but on the contrary, is intended to cover various modifications and equivalent arrangements falling under the scope of protection as defined by the appended claims.

Claims

1. A razor head (100) comprising a razor head frame (10) and a razor blade (20), the razor head frame (10) comprising a front side wall (10a), a rear side wall (10b) and a connecting side wall (10c) connected to the front side wall (10a) and the rear side wall (10b), the connecting side wall (10c), the front side wall (10a) and the rear side wall (10b) together enclosing an accommodating space (10d), the razor blade (10) being located in the accommodating space (10d), and a blade edge (21) of the razor blade (20) facing the front side wall (10a); wherein a rear part of the front side wall (10a) adjacent to the blade edge (21) is provided with a first skin contact portion (11), a front part of the front side wall (10a) away from the blade edge (21) is provided with a second skin contact portion (30a), a highest point (A) of the second skin contact portion (30a) is higher than a highest point (E) of the first skin contact portion (11), the highest point (E) of the first skin contact portion (11) is higher than the blade edge (21), and the highest point (E) of the first skin contact portion (11) is located below a plane (P) jointly defined by the highest point (A) of the second skin contact portion (30A) and the blade edge (21); characterized in that, the second skin contact portion (30a) has an arc-shaped structure with a convex middle portion along a front-rear direction of the razor head frame (10).

2. The razor head according to claim 1, further comprising a protective structure (30), wherein the protective structure (30) is arranged for covering the front part of the front side wall (10a), and the second skin contact portion (30a) is formed around a highest point of the protective structure (30).

3. The razor head according to claim 1, wherein an outer contour of a cross section of the second skin contact portion (30a) is an arc (31), and the height of the arc (31) increases first and then decreasing gradually along the front-rear direction of the razor head frame (10).

4. The razor head according to claim 3, wherein a rear end (B) of the arc (31) adjacent to the first skin contact portion (11) is extended and then intersects the first skin contact portion (11).

5. The razor head according to claim 1, further comprising a lubrication strip (40) mounted on the rear side wall (10b), and the lubrication strip (40) having a third skin contact portion (40) whose highest point (F) is lower than the blade edge (21).

6. The razor head according to claim 1, wherein the razor head (100) comprises at least two razor blades (20), the razor blades (20) are spaced side by side along a front-rear direction of the razor head frame (10), and the highest point (A) of the second skin contact portion (30a) and the blade edge (21) of the razor blade (20) adjacent to the first skin contact portion (11) together defines the plane (P).

7. The razor head according to claim 1, wherein a cross section of the first skin contact portion (11) is a straight line segment (11a).

8. The razor head according to claim 7, wherein an intersection of a part (12) of the front side wall (10a) for defining the accommodating space (10d) and the first skin contact portion (11) is a round-chamfered structure (13).

9. The razor head according to claim 8, wherein the straight line segment (11a) is tangent to an outer contour of a cross section of the round-chamfered structure (13).