Slit blade block and electric shaver

Abstract

The present disclosure obtains a slit blade block and an electric shaver capable of more efficiently shaving body hair while suppressing irritation to the skin. This slit blade block is provided with a slit outer blade (40) having a plurality of outer blades (415) that extend in a first direction and are disposed apart from each other in a second direction that intersects the first direction. In addition, the slit blade block is provided with a plurality of comb teeth (72) which are provided on the outer side of the slit outer blade (40) in the first direction and which are disposed apart from each other in the second direction. Furthermore, the comb teeth (72) are provided with protrusions (74) that protrude outward in the first direction, and the protrusions (74) have first protrusions (741) that extend so as to straddle two or more comb teeth (72) arranged in the second direction.

Description

Technical Field

[0001] The present disclosure relates to a slit knife block and an electric razor. Background Art

[0002] Conventionally, in electric shavers, as shown in Patent Document 1, there is known a slit blade block having a slit outer blade with a plurality of outer blades and a slit inner blade with a plurality of inner blades, which is used for rough shaving to shorten a beard that is relatively long.

[0003] In Patent Document 1, in order to improve the ability to introduce beards and whiskers without changing the size of the interval between the outer blades of the slit outer blade, the slit blade block includes comb teeth provided outside the slit outer blade.

[0004] Prior art literature

[0005] Patent Literature

[0006] Patent Document 1: Japanese Patent Application Publication No. 2020-195475 Summary of the invention

[0007] Problem that the invention aims to solve

[0008] In the slit blade block having such comb teeth, it is preferable to configure such a structure so as to not only efficiently shave body hair but also suppress irritation to the skin.

[0009] Therefore, an object of the present disclosure is to obtain a slit blade block and an electric shaver that can shave body hair more efficiently while suppressing irritation to the skin.

[0010] Solutions for solving problems

[0011] A slit knife block according to one embodiment of the present disclosure comprises: a slit outer knife having a plurality of outer blades extending in a first direction and arranged separately along a second direction intersecting the first direction; and a plurality of comb teeth, the plurality of comb teeth being arranged at a position closer to the outside in the first direction than the slit outer knife and arranged separately along the second direction, an outer slit being formed between the outer blades adjacent to each other in the second direction, a groove portion connected to the outer slit being formed between the comb teeth adjacent to each other in the second direction, a protrusion portion protruding outward in the first direction being provided on the comb teeth, the protrusion portion having a first protrusion portion extending in a manner spanning over two or more comb teeth arranged in the second direction.

[0012] Furthermore, an electric shaver according to one aspect of the present disclosure includes the slit blade block.

[0013] Effects of the Invention

[0014] According to the present disclosure, it is possible to obtain a slit blade block and an electric shaver that can shave body hair more efficiently while suppressing irritation to the skin. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a perspective view showing a partially exploded view of the electric shaver according to the embodiment.

[0016] Figure 2 It is an exploded perspective view showing a slit blade block according to the embodiment.

[0017] Figure 3 It is a cross-sectional view showing, in an enlarged manner, a slit outer blade and a slit inner blade of a slit blade block according to the embodiment.

[0018] Figure 4 It is a perspective view showing a state where the slit outer blade body in the embodiment is attached to the comb tooth member.

[0019] Figure 5 It is a perspective view showing the comb tooth member in the embodiment.

[0020] Figure 6 It is a partially enlarged perspective view showing a state in which the slit outer blade body in the embodiment is attached to the comb tooth member.

[0021] Figure 7 It is a partially enlarged plan view showing a state in which the slit outer blade body in the embodiment is attached to the comb tooth member.

[0022] Figure 8 These are diagrams schematically showing a plurality of examples of arrangement patterns of the slits of the slit outer blade and the grooves of the comb-tooth member in the embodiment.

[0023] Fig. 9 Yes means Figure 8 A top view of the specific structure of mode B is shown.

[0024] Fig.10 Yes means Figure 8 A top view of the specific structure of mode C is shown.

[0025] Fig.11 It is a perspective view showing a first modified example of the comb tooth member in the embodiment.

[0026] Fig.12 It is a plan view showing a first modified example of the comb tooth member in the embodiment.

[0027] Fig.13 It is a perspective view showing a second modified example of the comb tooth member in the embodiment.

[0028] Fig.14It is a plan view showing a second modified example of the comb tooth member in the embodiment.

[0029] Fig.15 This is a cross-sectional view obtained by cutting the slit outer blade body and the comb tooth member at a position corresponding to the groove portion in a state where the slit outer blade body in the embodiment is attached to the comb tooth member.

[0030] Fig.16 yes Fig.15 AA section view.

[0031] Fig.17 This is a diagram schematically showing a state where beards and whiskers are introduced into the groove portion of the slit blade block according to the embodiment.

[0032] Fig.18 It is a cross-sectional view showing a third modified example of the comb tooth member in the embodiment. DETAILED DESCRIPTION

[0033] Hereinafter, the embodiments will be described in detail with reference to the accompanying drawings. However, there are cases where unnecessary detailed descriptions are omitted. For example, there are cases where detailed descriptions of already well-known matters are omitted, or where repeated descriptions of substantially the same structures are omitted.

[0034] In addition, the drawings and the following description are provided for those skilled in the art to fully understand the present disclosure, and are not intended to limit the subject matter described in the claims.

[0035] In the following embodiments and their variations, the direction in which the plurality of blade blocks are arranged in parallel is set as the X direction (i.e., the first direction: the front-back direction: the shaving direction) and the direction in which each blade block extends is set as the Y direction (i.e., the second direction: the left-right direction) for description. Furthermore, the up-down direction in a state where the head (i.e., an element of the electric shaver) is arranged with the skin contact surface facing upward is set as the Z direction (i.e., the third direction: the up-down direction) for description. Furthermore, the side of the electric shaver where the power switch is provided is set as the front in the X direction for description.

[0036] In addition, the directions of the slit blade block are also described using the above-mentioned X direction, Y direction, and Z direction. That is, when the slit blade block is mounted on the razor body, the directions of the slit blade block that coincide with the X direction, Y direction, and Z direction are defined as the X direction, Y direction, and Z direction of the slit blade block, respectively.

[0037] (Implementation Method)

[0038] First, refer to Figure 1 The structure of the electric shaver 1 will be described.

[0039] Figure 1FIG. 1 is a perspective view showing a partially exploded view of an electric shaver 1 according to an embodiment. Figure 1 As shown, the electric shaver 1 of this embodiment includes a shaver body 10 and a blade unit 20 held in the shaver body 10 with a skin contacting surface 20a (ie, the surface of an outer blade of each blade block described later) exposed.

[0040] The razor body 10 includes a grip 11 that can be grasped by hand and a head 12 supported by the grip 11. In this embodiment, the head 12 is supported by the grip 11 in a state of being tilted upward and forward in a state in which the extending direction of the grip 11 is substantially consistent with the vertical direction.

[0041] The head 12 can swing in the Y direction relative to the handle 11 about a shaft portion (not shown) extending in the X direction. In addition, the head 12 can also swing in the X direction relative to the handle 11 about a shaft portion (not shown) extending in the Y direction. Furthermore, the head 12 can also float in the Z direction relative to the handle 11.

[0042] Furthermore, the above-mentioned swinging and floating can be appropriately combined. For example, the head 12 can swing relative to the handle 11 in the X direction and the Y direction, and can float relative to the handle 11 in the Z direction.

[0043] In addition, the structure in which the head 12 does not swing or float relative to the handle 11 can also be adopted. In addition, the structure in which the head 12 does not tilt relative to the handle 11 can also be adopted.

[0044] The handle portion 11 includes a main body housing 111, and a cavity is formed inside the main body housing 111. Various electrical components such as a rechargeable battery are housed in the cavity formed inside the main body housing 111.

[0045] In addition, a push-type power switch 111a for operating the electric shaver 1 (i.e., turning the power on / off) is formed on the main body housing 111. In addition, in the present embodiment, a push-type switch is exemplified as the power switch 111a, but as long as it is a switch that can turn the power on / off, it may also be a slide switch or other switch.

[0046] In this embodiment, the power switch 111a is formed on the front surface of the main housing 111, that is, the front surface (i.e., the front side) of the electric shaver 1. In addition, the front surface of the electric shaver 1 refers to the side opposite to the user when the user holds the handle 11 of the electric shaver 1 during normal use.

[0047] In addition, a trimming unit may be provided at the rear portion of the main body housing 111 (ie, the rear portion of the electric shaver 1 ).

[0048] The head 12 includes a head body 121 mounted on the handle 11 and a head cover 122 detachably mounted on the head body 121. In the present embodiment, the head cover 122 and the head body 121 are released by retracting release buttons 121a provided at both left and right ends of the head body 121 so as to freely protrude and retract.

[0049] In addition, a driving mechanism is housed in the head body 121. The driving mechanism includes a plurality of driving rods 13, and the driving rods 13 are housed in the head body 121 in a state of protruding upward from the head body 121. As such a driving mechanism, for example, a conventionally known driving mechanism such as a vibration type linear actuator, a driving mechanism composed of a rotary motor and a conversion mechanism that converts rotary motion into reciprocating linear motion can be used.

[0050] The blade unit 20 includes two first blade blocks 21, two second blade blocks 22, one slit blade block 30, and an outer blade housing 23. The five blade blocks are arranged in the X direction with their longitudinal directions aligned with the Y direction.

[0051] Thus, in this embodiment, each blade block has a predetermined length and width, and these blade blocks are configured so that the length direction is roughly consistent with the Y direction (i.e., the second direction: the left-right direction) of the electric shaver 1 and the width direction is roughly consistent with the X direction (i.e., the first direction: the front-back direction: the shaving direction) of the electric shaver 1.

[0052] In addition, the first blade block 21 mainly has the function of cutting the beard H (i.e., an example of body hair, see the following) in a prostrate state. Fig.17 ), the second blade block 22 mainly has the function of cutting short erected beard H (i.e., an example of body hair). And, the slit blade block 30 mainly has the function of cutting long and thin beard H (i.e., body hair).

[0053] In the present embodiment, one slit knife block 30 is arranged at the center in the X direction, and two first knife blocks 21 are respectively arranged on both sides of the slit knife block 30. Furthermore, two second knife blocks 22 are respectively arranged at positions on the opposite side of the slit knife block 30 relative to the first knife block 21. That is, two second knife blocks 22 are arranged at both ends in the X direction.

[0054] Furthermore, the blade unit 20 only needs to include at least one slit blade block 30, and may include four or less blade blocks, or may include six or more blade blocks. In addition, the arrangement order of the blade blocks may be appropriately set.

[0055] The first knife block 21 includes a first mesh knife 211 and a first inner knife 212. In the present embodiment, the first mesh knife 211 is formed by bending in an inverted U-shape so as to protrude upward when viewed from the side (i.e., when viewed along the Y direction). Furthermore, the first mesh knife 211 is formed by slightly bending along the Y direction (i.e., the length direction of the outer knife) so as to protrude upward when viewed from the front (i.e., when viewed from the X direction). In addition, a plurality of circular knife holes (not shown) are formed in the first mesh knife 211, for example. In addition, a structure can also be provided in which the first mesh knife 211 is not bent in a manner that protrudes upward when viewed from the front. For example, it can be provided that, when the first mesh knife 211 is viewed from the front (i.e., when viewed along the X direction), the top of the first mesh knife 211 becomes a straight line extending along the Y direction (i.e., the length direction of the outer knife).

[0056] The first inner blade 212 is in an inverted U shape following the curved shape of the first mesh blade 211 and is disposed on the inner side of the first mesh blade 211 (i.e., the lower side of the first mesh blade 211: relative to the first mesh blade 211 and the skin S (see the following description). Fig.17 ) is on the side opposite to the side in contact with the first mesh blade 211). The first inner blade 212 is detachably mounted on one of the plurality of drive rods 13. When the power of the electric shaver 1 is turned on and the drive rod 13 is driven in a state where the first inner blade 212 is mounted on the drive rod 13 and arranged inside the first mesh blade 211, the first inner blade 212 is relatively displaced (i.e., relatively moved: reciprocated along the Y direction) relative to the first mesh blade 211 while being in sliding contact with the inner surface of the first mesh blade 211.

[0057] Similarly, the second knife block 22 includes a second mesh knife 221 and a second inner knife (not shown). In the present embodiment, the second mesh knife 221 is also formed by bending in an inverted U-shape so as to protrude upward when viewed from the side (i.e., when viewed along the Y direction). Furthermore, the second mesh knife 221 is also formed by slightly bending along the Y direction (i.e., the length direction of the outer knife) so as to protrude upward when viewed from the front (i.e., when viewed from the X direction). In addition, a plurality of circular knife holes (not shown) are also formed in the second mesh knife 221, for example. In addition, a structure can also be provided so as not to bend the second mesh knife 221 so as to protrude upward when viewed from the front. For example, it can be provided that, when the second mesh knife 221 is viewed from the front (i.e., when viewed along the X direction), the top of the second mesh knife 221 becomes a straight line extending along the Y direction (i.e., the length direction of the outer knife).

[0058] Although not shown in the figure, like the first inner blade 212, the second inner blade is in the shape of an inverted U following the curved shape of the second mesh blade 221, and is arranged on the inner side of the second mesh blade 221 (i.e., the lower side of the second mesh blade 221: the side opposite to the side of the second mesh blade 221 that contacts the skin S). The second inner blade can be detachably mounted on one of the plurality of drive rods 13 (i.e., a drive rod 13 other than the drive rod on which the first inner blade 212 is mounted). Furthermore, when the power of the electric shaver 1 is turned on and the drive rod 13 is driven in a state where the second inner blade is mounted on the drive rod 13 and arranged on the inner side of the second mesh blade 221, the second inner blade is displaced relative to the second mesh blade 221 (i.e., relatively moved: reciprocated along the Y direction) while in sliding contact with the inner surface of the second mesh blade 221.

[0059] The slit blade assembly 30 includes a slit outer blade 40 and a slit inner blade 50 (see the slit blade assembly 30 described below). Figure 2 In the present embodiment, the slit outer blade 40 is formed by bending in an inverted U shape so as to protrude upward when viewed from the side (i.e., when viewed along the Y direction). Furthermore, the slit outer blade 40 is formed by bending slightly along the Y direction (the length direction of the outer blade) so as to protrude upward when viewed from the front (i.e., when viewed along the X direction). In addition, a plurality of slit-shaped blade holes (i.e., outer slits 416, see FIG. 4 ) are formed in the slit outer blade 40. Figure 2 ). In addition, the slit outer blade 40 may be configured so as not to be curved in a manner that the slit outer blade 40 protrudes upward when viewed from the front. For example, when the slit outer blade 40 is viewed from the front (i.e., viewed along the X direction), the top of the slit outer blade 40 may be a straight line extending along the Y direction (i.e., the length direction of the outer blade). That is, the top wall 411 (see FIG. 1 ) described later may be configured so as to be curved in a manner that the slit outer blade 40 protrudes upward when viewed from the front. Fig.12 )'s upper surface (i.e., skin contact surface 4111 (refer to Figure 3 The slit outer blade 40 is formed so as to become a flat surface (ie, a flat surface).

[0060] The slit inner blade 50 is in an inverted U shape following the curved shape of the slit outer blade 40, and is disposed on the inner side of the slit outer blade 40 (i.e., the lower side of the slit outer blade 40: the side opposite to the side of the slit outer blade 40 that contacts the skin S). The slit inner blade 50 can be detachably mounted on one of the plurality of drive rods 13 (i.e., a drive rod 13 other than the drive rod on which the first inner blade 212 and the second inner blade are mounted). Furthermore, when the power of the electric shaver 1 is turned on and the drive rod 13 is driven in a state where the slit inner blade 50 is mounted on the drive rod 13 and disposed on the inner side of the slit outer blade 40, one side of the slit inner blade 50 is in contact with the inner surface 4112 of the slit outer blade 40 (refer to Figure 3 ) The sliding contact side is relatively displaced relative to the slit outer knife 40 (i.e., relative movement: reciprocating movement along the Y direction).

[0061] Thus, the electric shaver 1 of the present embodiment is a reciprocating electric shaver in which the first inner blade 212 reciprocates relative to the first mesh blade 211 , the second inner blade reciprocates relative to the second mesh blade 221 , and the slit inner blade 50 reciprocates relative to the slit outer blade 40 .

[0062] And, in this embodiment, the components except two first inner knives 212 in the five knife blocks are installed in the roughly frame-shaped outer knife housing 23. At this time, it can be that each component can be installed in the outer knife housing 23 detachably, or it can be that each component is installed in the outer knife housing 23 in a state that cannot be removed.

[0063] In the present embodiment, the two first mesh knives 211 are mounted on the outer knife housing 23 in a state where the first inner knife 212 is not arranged on the inner side, and the two second mesh knives 221 are mounted on the outer knife housing 23 in a state where the second inner knife is arranged on the inner side. In addition, a slit outer knife 40 is mounted on the outer knife housing 23 in a state where the slit inner knife 50 is arranged on the inner side. At this time, it is preferably set so that at least one of the two first mesh knives 211, the two second mesh knives 221 and the one slit outer knife 40 is mounted on the outer knife housing 23 in a state where it can float along the Z direction (i.e., the up and down direction).

[0064] Thus, in this embodiment, the outer blade case 200 is formed by mounting two first net blades 211, two second blade blocks 22, and one slit blade block 30 on the outer blade housing 23. The outer blade case 200 is detachably mounted on the head cover 122.

[0065] Specifically, the head cover 122 has a substantially cylindrical peripheral wall portion 122c formed with an upper opening 122a and a lower opening 122b. And, by inserting the outer knife box 200 with each outer knife facing upward from the lower opening 122b side of the head cover 122, the outer knife box 200 is installed on the head cover 122. At this time, the outer knife box 200 is installed on the head cover 122 in a state where the surface of each outer knife is exposed from the upper opening 122a of the head cover 122. Therefore, in the present embodiment, the portion of the surface of each outer knife exposed from the upper opening 122a of the head cover 122 becomes the skin contact surface 20a that contacts the user's skin S (i.e., the skin surface).

[0066] Furthermore, release buttons 23 a are formed at both left and right ends of the outer blade housing 23 , and by operating the release buttons 23 a , the head cover 122 and the outer blade case 200 are released from being mounted.

[0067] As described above, in this embodiment, the head cover 122 with the outer knife box 200 installed is installed on the head body 121 while the two first inner knives 212 are respectively installed on the driving rod 13 protruding upward from the head body 121. And, when the head cover 122 with the outer knife box 200 installed is installed on the head body 121 while the two first inner knives 212 are respectively installed on the driving rod 13, the two first inner knives 212 are arranged on the inner side of the corresponding first mesh knife 211.

[0068] Thus, when the electric shaver 1 is powered on, each inner cutter is displaced relative to the corresponding outer cutter (ie, relatively moved: reciprocated in the Y direction).

[0069] Furthermore, when the electric shaver 1 is powered on and each inner blade is displaced relative to the corresponding outer blade, the skin contact surface 20a of the blade unit 20 is brought into contact with the user's skin S (i.e., the skin surface) and moves while sliding in the X direction, thereby cutting the beard H (i.e., an example of body hair) inserted into the blade hole of each outer blade by the outer blade and the inner blade. In addition, if the outer blade is mounted on the outer blade housing 23 in a state in which it can float in the Z direction (i.e., the up-down direction), the outer blade will float relative to the razor body 10. Therefore, the outer blade (i.e., the skin contact surface 20a of the blade unit 20) can more reliably follow the shape of the skin S, and the beard H (i.e., an example of body hair) can be cut more reliably.

[0070] Next, refer to Figure 2 to Figure 7 The detailed structure of the slit blade block 30 will be described. Figure 2 It is an exploded perspective view showing the slit blade block 30 according to the embodiment. Figure 3 It is a cross-sectional view showing, in an enlarged manner, the slit outer blade 40 and the slit inner blade 50 of the slit blade block 30 according to the embodiment. Figure 4 It is a perspective view showing a state where the slit outer blade body 410 according to the embodiment is attached to the comb tooth member 70 . Figure 5 It is a perspective view showing the comb-tooth member 70 in the embodiment. Figure 6 It is a partially enlarged perspective view showing a state where the slit outer blade body 410 according to the embodiment is attached to the comb tooth member 70 . Figure 7 It is a plan view partially enlarging and showing a state where the slit outer blade body 410 in the embodiment is attached to the comb tooth member 70 .

[0071] like Figure 2 As shown, the slit knife block 30 includes a slit outer knife 40 and a slit inner knife 50. Furthermore, the slit knife block 30 includes a pair of coil springs 60, which couple the slit outer knife 40 and the slit inner knife 50 so that the slit inner knife 50 can reciprocate relative to the slit outer knife 40 in the Y direction.

[0072] In the present embodiment, the slit outer blade 40 includes a slit outer blade body 410 having a plurality of outer blades 415 , and an outer blade joint 420 fixed to the slit outer blade body 410 and connected to a pair of coil springs 60 .

[0073] Similarly, the slit inner blade 50 includes a slit inner blade body 510 having a plurality of inner blades 515 , and an inner blade joint 520 fixed to the slit inner blade body 510 and connected to a pair of coil springs 60 .

[0074] First, the slit outer blade body 410 will be described.

[0075] The slit outer blade body 410 can be formed of, for example, a metal material, and is formed into a shape that is curved in an inverted U-shape so as to protrude upward when viewed from the side (i.e., when viewed along the Y direction). That is, the slit outer blade body 410 has a top wall 411 (i.e., a first wall portion) that is a roughly rectangular plate-shaped portion that is relatively slender in the Y direction, and a pair of side walls 412 (i.e., a second wall portion) that extend from both ends of the top wall 411 in the X direction to the bottom in the Z direction. Furthermore, the upper surface of the top wall 411 (i.e., the first wall portion) becomes a skin contact surface 4111 (refer to FIG. 1 ) that can come into contact with the user's skin S when the electric shaver 1 is used. Figure 3 ).

[0076] In addition, two first fusion-fixed portions 4121 and two second fusion-fixed portions 4122 are formed on each of the pair of side walls 412. That is, four first fusion-fixed portions 4121 and four second fusion-fixed portions 4122 are formed on the slit outer blade body 410.

[0077] The first fusion fixing portion 4121 is formed to protrude downward in the Z direction at both ends of the side wall 412 in the Y direction, and a substantially circular notch opening downward is formed in the center of the first fusion fixing portion 4121. In addition, the second fusion fixing portion 4122 is formed to protrude downward in the Z direction at a position in the side wall 412 that is closer to the inside in the Y direction than the first fusion fixing portion 4121. Furthermore, in the present embodiment, the second fusion fixing portion 4122 is formed to be located at a position lower in the Z direction than the first fusion fixing portion 4121, and a substantially circular notch opening downward is also formed in the center of the second fusion fixing portion 4122.

[0078] In this embodiment, four first claws 4123, one second claw 4124, and four fitting holes 4125 are formed on each of the pair of side walls 412. That is, eight first claws 4123, two second claws 4124, and eight fitting holes 4125 are formed on the slit outer blade body 410.

[0079] The first claw piece 4123 is in a tapered shape whose size in the Y direction decreases as it goes downward in the Z direction, and is curved in a manner that the top end (i.e., the lower end) protrudes downward when viewed from the front (i.e., when viewed along the X direction). In addition, four first claw pieces 4123 are formed at the lower end of a side wall 412 in a state of being separated in the Y direction and protruding downward. Specifically, the two first claw pieces 4123 are formed to be located between the first fusion fixing portion 4121 and the second fusion fixing portion 4122 adjacent to each other in the Y direction, and the two first claw pieces 4123 are formed between a pair of second fusion fixing portions 4122 adjacent to each other in the Y direction.

[0080] In addition, the second claw piece 4124 is also tapered in that the size in the Y direction decreases as it goes downward in the Z direction, and is curved in a manner that the top end (i.e., the lower end) protrudes downward when viewed from the front (i.e., when viewed along the X direction). In addition, a second claw piece 4124 is formed at the lower end of a side wall 412 in a manner that protrudes downward. In the present embodiment, a second claw piece 4124 is formed between two first claw pieces 4123 formed between a pair of second fusion fixing portions 4122 adjacent to each other in the Y direction in a state separated from the first claw piece 4123 in the Y direction. That is, a second claw piece 4124 is formed at the lower end of the central portion in the Y direction of a side wall 412. The second claw piece 4124 is formed so that the size in the Z direction is smaller than the size in the Z direction of the first claw piece 4123, and the lower end of the second claw piece 4124 is located at a position above the lower end of the first claw piece 4123 in the Z direction.

[0081] The fitting hole 4125 has a rectangular shape that is relatively elongated in the Y direction when viewed from the front (ie, viewed along the X direction), and is formed to penetrate in the X direction. Four fitting holes 4125 are formed at the lower end of one side wall 412 in a state of being separated in the Y direction.

[0082] Specifically, a fitting hole 4125 is formed between the first claw piece 4123 adjacent to the first fusion fixing portion 4121 in the Y direction and the second fusion fixing portion 4122 adjacent to the first claw piece 4123 in the Y direction. The fitting holes 4125 are two fitting holes 4125 arranged at both ends in the Y direction among the four fitting holes 4125. Furthermore, the two fitting holes 4125 arranged at both ends in the Y direction are respectively formed in the protrusions formed continuously with the outer side in the Y direction of the protrusion forming the second fusion fixing portion 4122.

[0083] In addition, a fitting hole 4125 is formed between each of the first claw piece 4123 and the second claw piece 4124 adjacent to each other in the Y direction. The fitting holes 4125 are two fitting holes 4125 arranged on the inner side in the Y direction among the four fitting holes 4125. Furthermore, the two fitting holes 4125 arranged on the inner side in the Y direction are respectively formed in a protruding piece that protrudes from the lower end of one side wall 412 and has a relatively elongated rectangular shape in the Y direction when viewed from the front (i.e., when viewed along the X direction).

[0084] The slit outer blade body 410 includes a slit outer blade portion 413 having an outer blade 415 and an outer slit 416 , and a connecting portion 414 provided continuously to both ends of the slit outer blade portion 413 in the Y direction.

[0085] A plurality of outer blades 415 are formed in the slit outer blade portion 413 in a state extending in the X direction and separated in the Y direction. In the present embodiment, the plurality of outer blades 415 are arranged at approximately equal intervals in the Y direction at a predetermined pitch (i.e., a predetermined interval). In addition, in the present embodiment, the plurality of outer blades 415 extend from one side wall 412 to the other side wall 412 through a substantially flat top wall 411, and are formed in a shape that is curved in an inverted U-shape in a manner that protrudes upward when viewed from the side (i.e., when viewed along the Y direction). That is, as Figure 3 As shown, the outer blade 415 includes: an upper outer blade 4151 formed on the top wall 411; and a pair of side outer blades 4152 formed on the side wall 412 and arranged continuously with the ends of the upper outer blade 4151 in the X direction.

[0086] And, if Figure 2 and Figure 3 As shown, the outer slit 416 extending in the X direction is formed between the outer blades 415 adjacent in the Y direction in a manner following the outer blades 415. Therefore, in this embodiment, the outer slit 416 includes: an outer upper slit 4161 (i.e., a first slit), which is divided by the upper outer blades 4151 adjacent in the Y direction; and a pair of outer slits 4162 (i.e., a second slit), which are divided by the side outer blades 4152 adjacent in the Y direction. In this way, in this embodiment, both ends of the outer slit 416 in the X direction are formed on the side wall 412.

[0087] Furthermore, in this embodiment, if Figure 3As shown, a pair of outer side slits 4162 (i.e., second slits) are connected through an outer inner space 4163, and the outer slit 416 also has an outer inner space 4163. Thus, the outer slit 416 is opened not only at the top but also at both sides in the X direction, and the outer slit 416 that can pass from one end in the X direction to the other end is formed at a position above the lower end 41621 of the side slit (i.e., second slit) 4162. That is, the outer slit 416 can be formed uninterruptedly from one end to the other end of the slit outer blade 40 in the X direction.

[0088] Thus, even relatively long beards H (i.e., an example of body hair) can be introduced relatively easily into the outer slit 416. In addition, the beards H (i.e., an example of body hair) can be prevented from being caught on the outer blade 415, thereby preventing the resistance (e.g., friction, etc.) caused by the beards H (i.e., an example of body hair) from increasing, thereby preventing the shaving feeling from being deteriorated. Thus, the outer slit 416 has the function of introducing the long beards H (i.e., an example of body hair) into the slit outer blade 40.

[0089] Furthermore, such a slit outer blade body 410 can be formed by punching a sheet of metal flat material. Specifically, first, a plurality of elongated slits are arranged in parallel at predetermined intervals through the metal flat material, so that the portion to be the outer blade is formed in the remaining portion of the metal plate between adjacent slits. At this time, a sheet of metal flat material is punched in such a manner that through holes, notches, tabs, etc. are also formed.

[0090] Then, the metal plate is bent in the same direction relative to both ends of the slit in the front-rear direction (ie, the slit length direction), thereby forming a slit outer blade body 410 having a top wall 411 and a pair of side walls 412 .

[0091] The shape of the slit outer blade body 410 can be a shape in which the bending angle of the upper part of the curved portion is an acute angle, or a shape in which the bending angle of the curved portion is approximately a right angle (i.e., approximately 90°). In the present embodiment, the slit outer blade body 410 in which the bending angle of the curved portion is approximately a right angle (i.e., approximately 90°) is illustrated.

[0092] Next, the outer blade connector 420 will be described.

[0093] The outer blade joint 420 can be formed by, for example, injection molding a resin material. The outer blade joint 420 includes a pair of joint main bodies 421 having the same shape, and the pair of joint main bodies 421 are separated and arranged symmetrically in the Y direction.

[0094] In addition, in this embodiment, if Figure 2As shown, the joint body 421 includes a placement portion 422 for placing the comb tooth member 70 described later. The placement portion 422 is substantially T-shaped when viewed from above, and is formed at the upper end portion of the outer side in the Y direction of the joint body 421. In addition, in the present embodiment, the placement portion 422 includes an outer portion 4221 and an inner portion 4222, and the outer portion 4221 is formed to be continuous with the inner portion 4222 on the outer side in the Y direction of the inner portion 4222. The outer portion 4221 is formed to have a larger dimension in the X direction than the dimension in the X direction of the inner portion 4222.

[0095] In addition, a protrusion 423 protruding upward in the Z direction is formed on the outer portion 4221. In the present embodiment, the protrusion 423 having a rectangular shape whose dimension in the X direction is larger than that in the Y direction in plan view is formed in the center of the outer portion 4221.

[0096] In addition, a first weld 424 and a second weld 425 protruding in the X direction are formed on both sides of the joint body 421 in the X direction. That is, four first welds 424 and four second welds 425 are formed in the outer knife joint 420. In addition, the two first welds 424 provided in one joint body 421 are substantially cylindrical and are formed at a position on the inner side of the joint body 421 in the Y direction relative to the inner square portion 4222. The two first welds 424 are formed in one joint body 421 in such a manner that they overlap each other when viewed from the front (i.e., when viewed along the X direction).

[0097] In addition, the two second welded portions 425 provided in one joint body 421 are substantially cylindrical and are formed at the end of the joint body 421 which is opposite to the mounting portion 422 in the Y direction (i.e., the inner side in the Y direction of the outer blade joint 420). The two second welded portions 425 are also formed in one joint body 421 so as to overlap each other in a front view (i.e., when viewed along the X direction).

[0098] Furthermore, when the outer blade joint 420 is fixed to the slit outer blade body 410, the first welding portion 424 is inserted into the substantially circular notch of the first welding fixing portion 4121, and the second welding portion 425 is inserted into the substantially circular notch of the second welding fixing portion 4122. Therefore, in the present embodiment, the second welding portion 425 is formed to be located below the first welding portion 424 in the Z direction.

[0099] Then, heat sealing is performed with the first fusion portion 424 inserted into the substantially circular notch of the first fusion fixing portion 4121 and the second fusion portion 425 inserted into the substantially circular notch of the second fusion fixing portion 4122, thereby fusion-bonding the first fusion portion 424 to the first fusion fixing portion 4121 and fusion-bonding the second fusion portion 425 to the second fusion fixing portion 4122. Thus, the outer blade joint 420 is fixed to the slit outer blade body 410, thereby forming the slit outer blade 40.

[0100] In the present embodiment, the spring attachment portion 426 is formed on the joint body 421 so as to protrude upward in the Z direction, and the spring attachment portion 426 is inserted into the lower end of the coil spring 60 , thereby connecting the slit outer blade 40 to the coil spring 60 .

[0101] The spring attachment portion 426 has a substantially truncated cone shape and is formed to be located between the first weld portion 424 and the second weld portion 425 in the Y direction. In the present embodiment, the spring attachment portion 426 is formed to be located below the second weld portion 425 in the Z direction.

[0102] Next, the slit inner blade body 510 will be described.

[0103] Similar to the slit outer blade body 410, the slit inner blade body 510 can also be formed using a metal material or the like, and is formed into a shape that is curved in an inverted U shape in a manner that protrudes upward when viewed from the side (i.e., when viewed along the Y direction). That is, the slit inner blade body 510 includes a top wall 511 that is a generally rectangular plate-shaped plate that is relatively slender in the Y direction, and a pair of side walls 512 that extend from both ends of the top wall 511 in the X direction to the bottom in the Z direction. And, as Figure 3 As shown, the slit inner blade body 510 is arranged inside the slit outer blade body 410 in a state where the upper surface 5111 of the top wall 511 can slidably contact the inner surface 4112 of the top wall 411 .

[0104] In addition, two positioning portions 5121 and two fusion fixing portions 5122 are formed on each of the pair of side walls 512 .

[0105] The positioning portion 5121 is formed to protrude downward in the Z direction on both sides of the side wall 512 in the Y direction, and a substantially concave notch opening downward is formed in the center of the positioning portion 5121. In addition, the fusion fixing portion 5122 is formed to protrude downward in the Z direction at a position in the side wall 512 that is closer to the inside in the Y direction than the positioning portion 5121. In addition, in the present embodiment, the fusion fixing portion 5122 is formed to be located at a position lower in the Z direction than the positioning portion 5121, and a substantially circular notch opening downward is formed in the center of the fusion fixing portion 5122.

[0106] The slit inner blade body 510 includes a slit inner blade portion 513 having an inner blade 515 and an inner slit 516 , and a connecting portion 514 provided continuously to both ends of the slit inner blade portion 513 in the Y direction.

[0107] A plurality of inner blades 515 are formed in the slit inner blade portion 513 in a state of extending in the X direction and separated in the Y direction. In the present embodiment, the plurality of inner blades 515 are formed to be arranged at approximately equal intervals in the Y direction at a predetermined pitch (i.e., a predetermined interval). In addition, in the present embodiment, the plurality of inner blades 515 extend from one side wall 512 to the other side wall 512 through a substantially flat top wall 511, and are formed to be curved in an inverted U-shape in a manner of convexly protruding upward when viewed from the side (i.e., when viewed along the Y direction). That is, as Figure 3 As shown, the inner blade 515 includes: an upper inner blade 5151 formed on the top wall 511; and a pair of side inner blades 5152 formed on the side wall 512 and arranged continuously with the ends of the upper inner blade 5151 in the X direction.

[0108] In addition, the inner slit 516 extending in the X direction is formed between the inner blades 515 adjacent in the Y direction in a manner following the inner blades 515. Therefore, in the present embodiment, the inner slit 516 includes: an inner upper slit 5161 divided by the upper inner blades 5151 adjacent in the Y direction; and a pair of inner side slits 5162 divided by the side inner blades 5152 adjacent in the Y direction. Furthermore, in the present embodiment, the pair of inner side slits 5162 are connected by the inner internal space 5163, and the inner slit 516 also includes the inner internal space 5163. Thus, the inner slit 516 is opened not only at the top but also at both sides in the X direction, and the inner slit 516 that can be connected from one end to the other end in the X direction is formed at a position above the lower end of the inner side slit 5162. That is, the inner slit 516 can be formed without interruption from one end to the other end of the slit inner blade 50 in the X direction.

[0109] Thus, it is possible to more reliably prevent the beard H (i.e., an example of body hair) introduced from the side of the outer slit 416 from interfering with the side wall 512. Thus, the inner slit 516 has the function of introducing the cut portion of the long beard H (i.e., an example of body hair) into the slit inner blade 50.

[0110] Such a slit inner blade body 510 can also be formed by punching a sheet of metal flat material. Specifically, first, a plurality of elongated slits are arranged in parallel at predetermined intervals through the metal flat material, so that the portion to be the inner blade is formed in the remaining portion of the metal plate between adjacent slits. At this time, a sheet of metal flat material is punched in such a manner that through holes, notches, protrusions, etc. are also formed.

[0111] Then, the metal plate is bent in the same direction relative to both ends in the front-rear direction of the slit (ie, the slit length direction), thereby forming a slit inner blade body 510 having a top wall 511 and a pair of side walls 512 .

[0112] The shape of the slit inner blade body 510 may be a shape in which the bending angle of the upper part of the curved portion is an acute angle, or a shape in which the bending angle of the curved portion is approximately a right angle (i.e., approximately 90°). In this embodiment, the slit inner blade body 510 in which the bending angle of the curved portion is approximately a right angle (i.e., approximately 90°) is illustrated.

[0113] Next, the inner blade joint 520 will be described.

[0114] The inner blade connector 520 can be formed by, for example, injection molding a resin material. Figure 2 As shown, a joint body 521 is provided.

[0115] The joint body 521 has a shape that is relatively elongated in the Y direction, and a fitting recess 522 that is detachably fitted to the drive rod 13 is formed in the center portion of the joint body 521 in the Y direction so as to open downward in the Z direction.

[0116] In addition, two positioning portions 523 and two welding portions 524 protruding in the X direction are formed on both sides of the joint body 521 in the X direction. That is, four positioning portions 523 and four welding portions 524 are formed in the inner blade joint 520 .

[0117] Furthermore, two positioning portions 523 are formed on one side of the joint body 521 in the X direction in such a manner that they protrude toward one side in the X direction between the end portion in the Y direction of the joint body 521 and the fitting recess 522. In addition, two positioning portions 523 are also formed on the other side of the joint body 521 in the X direction in such a manner that they protrude toward the other side in the X direction between the end portion in the Y direction of the joint body 521 and the fitting recess 522. In the present embodiment, the four positioning portions 523 are substantially cylindrical, and the two positioning portions 523 formed on one side of the joint body 521 in the X direction are formed so as to overlap with the two positioning portions 523 formed on the other side of the joint body 521 in the X direction when viewed from the front (i.e., when viewed along the X direction).

[0118] Similarly, two welded portions 524 are formed on one side of the joint body 521 in the X direction so as to protrude between the positioning portion 523 and the fitting recess 522 to one side in the X direction. In addition, two welded portions 524 are also formed on the other side of the joint body 521 in the X direction so as to protrude between the positioning portion 523 and the fitting recess 522 to the other side in the X direction. In the present embodiment, the four welded portions 524 are substantially cylindrical, and the two welded portions 524 formed on one side of the joint body 521 in the X direction are formed so as to overlap with the two welded portions 524 formed on the other side of the joint body 521 in the X direction when viewed from the front (i.e., when viewed along the X direction).

[0119] When the inner blade joint 520 is fixed to the slit inner blade body 510, the positioning portion 523 is inserted into the substantially concave notch of the positioning portion 5121, and the welding portion 524 is inserted into the substantially circular notch of the welding fixing portion 5122. Therefore, in the present embodiment, the positioning portion 523 is formed to be located above the welding portion 524 in the Z direction.

[0120] Then, the heat sealing process is performed in a state where the positioning portion 523 is inserted into the substantially concave notch of the positioning portion 5121 and the welding portion 524 is inserted into the substantially circular notch of the welding fixing portion 5122, so that the welding portion 524 is welded to the welding fixing portion 5122 in a state where the positioning portion 523 and the positioning portion 5121 are positioned. Thus, the inner blade joint 520 is fixed to the slit inner blade body 510 to form the slit inner blade 50.

[0121] In the present embodiment, the spring mounting portion 525 is formed on the joint body 521 so as to protrude downward in the Z direction, and the spring mounting portion 525 is inserted into the upper end of the coil spring 60 , thereby connecting the slit inner blade 50 to the coil spring 60 .

[0122] The spring mounting portion 525 has a substantially cylindrical shape and is formed at both ends of the joint body 521 in the Y direction.

[0123] The slit blade block 30 is intended for rough shaving by shortening the relatively long beard H (ie, an example of body hair). In such a slit blade block 30, it is preferable to improve the introduction of the beard H (ie, an example of body hair) into the outer slit 416.

[0124] Here, in order to improve the introduction of the beard H (i.e., an example of body hair) into the outer slit 416, it is considered to increase the interval between the outer blades 415 of the slit outer blade 40. However, if the interval between the outer blades 415 of the slit outer blade 40 is increased, the following problems will arise: the irritation to the skin S increases; and the strength of the slit outer blade 40 decreases due to the narrowing of the width of the outer blade 415.

[0125] Therefore, in the present embodiment, the slit blade block 30 is provided with a plurality of comb teeth 72 which are arranged outside the slit outer blade 40 in the X direction and are separated and arranged in the Y direction. Furthermore, a groove portion 75 which communicates with the outer slit 416 is formed between the comb teeth 72 adjacent in the Y direction, and a protrusion 74 which protrudes outward in the X direction is provided on the comb teeth 72.

[0126] Thus, the introduction of the beard H (i.e., an example of body hair) into the outer slit 416 can be improved without changing the size of the interval between the outer blades 415 of the slit outer blade 40. Specifically, when the electric shaver 1 is used, the top of the protrusion 74 provided on the comb teeth 72 is inserted between the long beard H (i.e., an example of body hair) lying down relative to the skin S and the skin S. Then, the long beard H (i.e., an example of body hair) jumps onto the top of the protrusion 74, and the long beard H (i.e., an example of body hair) moves along the surface of the protrusion 74 with the movement of the comb teeth 72, thereby making the beard H (i.e., an example of body hair) stand up, and in the standing state, the beard H is introduced from the groove 75 into the outer slit 416.

[0127] In this embodiment, the comb tooth member 70 having the comb teeth 72 and the slit outer blade 40 are formed separately. Figure 4 As shown, by attaching the comb-tooth member 70 to the slit outer blade 40 , the plurality of comb teeth 72 are separated and arranged along the Y direction at positions further outward in the X direction than the slit outer blade 40 .

[0128] The comb-tooth component 70 can be formed, for example, by injection molding a resin material, and has lower rigidity than the slit outer blade 40. The comb-tooth component 70 is roughly frame-shaped and penetrates in the Z direction, and is slightly curved in the Y direction (i.e., the outer blade length direction) in a manner that bulges upward when viewed from the front (i.e., when viewed along the X direction). In addition, it is also possible to have a structure as follows: the comb-tooth component 70 is not curved in a manner that bulges upward when viewed from the front. For example, it is possible to have a structure in which, when the comb-tooth component 70 is viewed from the front (i.e., when viewed along the X direction), the top of the comb-tooth component 70 (i.e., the upper end of the comb-tooth support wall 71 described later) becomes a straight line extending in the Y direction (i.e., the outer blade length direction).

[0129] like Figure 5 As shown, the comb-tooth member 70 includes a pair of comb-tooth support walls 71 extending in the Y direction and the Z direction and facing each other in the X direction. In addition, the comb-tooth member 70 includes a pair of comb-tooth end walls 77 extending in the X direction and the Z direction and facing each other in the Y direction, and the pair of comb-tooth end walls 77 are respectively provided continuously with the ends of the pair of comb-tooth support walls 71 in the Y direction.

[0130] The pair of comb teeth support walls 71 each include a support wall body 710, and a plurality of comb teeth 72 are formed at the upper end of each support wall body 710 in a state separated in the Y direction and protruding upward. Therefore, in the present embodiment, the following structure is set: the rows of comb teeth 72 arranged in a state separated in the Y direction are arranged in two rows in the X direction.

[0131] In addition, four first through holes 711 penetrating in the Z direction, one second through hole 712 penetrating in the Z direction, and four fitting protrusions 713 protruding inward in the X direction are formed on the inner side in the X direction (i.e., the side opposite to each other) of each supporting wall body 710. That is, eight first through holes 711, two second through holes 712, and eight fitting protrusions 713 are formed in the comb tooth member 70.

[0132] In the present embodiment, eight first through holes 711 are formed at positions corresponding to eight first claw pieces 4123 formed on the slit outer blade body 410. When the slit outer blade body 410 is inserted and installed from above into the substantially frame-shaped comb tooth member 70, the eight first claw pieces 4123 are respectively inserted into the eight first through holes 711.

[0133] In addition, two second through holes 712 are formed at positions corresponding to two second claws 4124 formed on the slit outer blade body 410. When the slit outer blade body 410 is inserted and installed from above into the substantially frame-shaped comb member 70, the two second claws 4124 are inserted into the two second through holes 712, respectively.

[0134] In addition, eight fitting protrusions 713 are formed at positions corresponding to eight fitting holes 4125 formed in the slit outer blade body 410. When the slit outer blade body 410 is inserted and installed from above into the substantially frame-shaped comb member 70, the eight fitting protrusions 713 are fitted into the eight fitting holes 4125, respectively.

[0135] As described above, in the present embodiment, the slit outer blade body 410 is attached to the comb tooth member 70 by fitting the eight fitting protrusions 713 into the eight fitting holes 4125 , respectively.

[0136] The comb-tooth end wall 77 includes an end wall body 771, which contacts the upper surface of the mounting portion 422 of the outer blade connector 420 when the slit blade block 30 is assembled. In the present embodiment, the end wall body 771 is curved in a manner that it is located downward as it moves toward the outside in the Y direction when viewed from the front (i.e., when viewed along the X direction), and the lower end of the end wall body 771 is a flat surface extending substantially horizontally. In addition, a storage portion (not shown) is formed at the lower end of the end wall body 771, and the storage portion stores the protrusion 423 formed on the mounting portion 422 when the slit blade block 30 is assembled.

[0137] Furthermore, the comb tooth end wall 77 has a protrusion 772, which protrudes from the inner surface of the end wall body 771 in the Y direction to the inner side in the Y direction, and contacts the upper surface of the mounting portion 422 of the outer blade joint 420 when the slit blade assembly 30 is assembled. In this embodiment, the protrusion 772 is roughly quadrilateral in a plan view (i.e., when viewed along the Z direction), and the upper surface is a flat surface extending roughly horizontally. And when the slit outer blade body 410 is mounted on the comb tooth component 70, the connecting portion 414 of the slit outer blade body 410 (i.e., the outer end of the top wall 411 in the Y direction) is placed on the upper surface of the protrusion 772.

[0138] As described above, in the present embodiment, when the slit blade assembly 30 is assembled, the protrusion 772 of the comb-tooth member 70 is sandwiched between the slit outer blade body 410 and the outer blade joint 420 .

[0139] Therefore, when the slit blade block 30 is assembled, the comb-tooth member 70 is attached to the slit outer blade 40 in a state where the relative movement in the Z direction and the Y direction with respect to the slit outer blade body 410 and the outer blade joint 420 is restricted.

[0140] In addition, if Figure 7As shown, the comb teeth 72 include a support portion 73 formed at the upper end of the support wall body 710 in a manner protruding upward. In addition, a protrusion 74 is provided at the upper end of the support portion 73, and the protrusion 74 is formed to protrude outward in the X direction. Thus, in this embodiment, the comb teeth 72 include: a support portion 73 formed at the upper end of the support wall body 710 in a manner protruding upward; and a protrusion 74 formed at the upper end of the support portion 73 in a manner protruding outward in the X direction.

[0141] Furthermore, in this embodiment, if Figure 5 to Figure 7 As shown in FIG. 1 , when viewed along the Y direction (i.e., the second direction), the protrusion 74 is formed into a curved shape that is convex to the outside in the X direction (i.e., the first direction). Thus, when shaving the beard H (i.e., an example of body hair), the curved portion of the protrusion 74 can be brought into contact with the user's skin S, and the irritation to the skin S can be further reduced.

[0142] Here, in the present embodiment, the arrangement pitch of the comb teeth 72 is made substantially the same as the arrangement pitch of the outer blade 415, and when the slit outer blade body 410 is mounted on the comb tooth member 70, each comb tooth 72 is adjacent to the outer blade 415 in the X direction. Thus, the groove 75 formed between the comb teeth 72 adjacent in the Y direction is communicated with the outer slit 416, and the groove 75 has a function of introducing the long beard H (i.e., an example of body hair) into the outer slit 416 formed in the slit outer blade body 410.

[0143] The slit outer blade body 410, the outer blade joint 420, the slit inner blade body 510, the inner blade joint 520, the coil spring 60, and the comb-tooth member 70 formed in such a shape are assembled and integrated to form the slit blade block 30.

[0144] Hereinafter, an example of a method of assembling the slit blade block 30 will be described.

[0145] First, the slit inner blade body 510 is fixed to the inner blade joint 520 to form the slit inner blade 50. Specifically, the heat sealing process is performed in a state where the positioning portion 523 is inserted into the substantially concave notch of the positioning portion 5121 and the welding portion 524 is inserted into the substantially circular notch of the welding fixing portion 5122, and the welding portion 524 is welded to the welding fixing portion 5122 in a state where the positioning portion 523 and the positioning portion 5121 are positioned. Thus, the inner blade joint 520 is fixed to the slit inner blade body 510 to form the slit inner blade 50.

[0146] Next, the spring mounting portions 426 of the pair of joint bodies 421 of the outer blade joint 420 are respectively inserted into the lower ends of the corresponding coil springs 60, so that the outer blade joint 420 is connected to the coil spring 60. In addition, this step can be performed before the step of forming the slit inner blade 50, or it can be performed simultaneously with the step of forming the slit inner blade 50.

[0147] Next, the pair of spring mounting portions 525 provided on the slit inner blade 50 are respectively inserted into the upper ends of the corresponding coil springs 60 , so that the slit inner blade 50 is connected to the coil spring 60 .

[0148] Next, the slit outer blade body 410 is inserted from above into the comb tooth member 70, and the slit outer blade body 410 is attached to the comb tooth member 70. This step can be performed simultaneously with at least one of the above steps, or can be performed before at least one of the above steps.

[0149] Then, the slit outer blade body 410 is mounted on the comb tooth member 70 and the outer blade joint 420 and the slit inner blade 50 are connected to the coil spring 60, and the slit outer blade body 410 is fixed to the outer blade joint 420 to form the slit outer blade 40. Specifically, the heat sealing process is performed in a state where the first welding portion 424 is inserted into the substantially circular notch of the first welding and fixing portion 4121 and the second welding portion 425 is inserted into the substantially circular notch of the second welding and fixing portion 4122, thereby the first welding portion 424 is welded to the first welding and fixing portion 4121 and the second welding portion 425 is welded to the second welding and fixing portion 4122. Thus, the outer blade joint 420 is fixed to the slit outer blade body 410 to form the slit outer blade 40.

[0150] If such a process is performed, a slit knife assembly block 30 can be formed by assembling the slit outer knife body 410, the outer knife joint 420, the slit inner knife body 510, the inner knife joint 520, the coil spring 60, and the comb tooth component 70 to form an integrated slit knife assembly block 30, in which the slit inner knife body 510 is installed to be able to reciprocate relative to the slit outer knife body 410.

[0151] At this time, the coil spring 60 is maintained in a compressed state by the inner blade joint 520 and the outer blade joint 420. Thus, the upper surface 5111 of the top wall 511 of the slit inner blade body 510 elastically contacts the inner surface 4112 of the top wall 411 of the slit outer blade body 410 by the coil spring 60.

[0152] Thus, in the slit knife block 30 of the present embodiment, the slit inner knife 50 is housed inside the slit outer knife body 410 in a state where the upper surface 5111 of the slit inner knife body 510 can elastically contact the inner surface 4112 of the slit outer knife body 410 and slide in the Y direction. Thus, it is possible to ensure good sharpness when the beard H (i.e., an example of body hair) is cut on the sliding surfaces (i.e., the inner surface 4112 and the upper surface 5111) of the slit outer knife 40 and the slit inner knife 50.

[0153] Here, in the present embodiment, when the electric shaver 1 is used, irritation to the skin S can be more reliably suppressed.

[0154] Specifically, the protrusion 74 formed so as to protrude outward in the X direction from the upper end of the support portion 73 has a first protrusion 741 extending so as to span two or more support portions 73 (i.e., one element of the comb teeth 72) arranged in the Y direction (i.e., the second direction). That is, the first protrusion 741 having a relatively wide width in the Y direction (i.e., the second direction) is provided on the support portion 73 (i.e., one element of the comb teeth 72).

[0155] Thus, when shaving the beard H (ie, body hair), the first protrusion 741 having a wider width in the Y direction (ie, the second direction) can be brought into contact with the user's skin S, and the irritation to the skin S can be further reduced.

[0156] Furthermore, in the present embodiment, an elongated first protrusion 741 formed in a manner extending from the comb teeth 72 at one end in the Y direction (i.e., the second direction) to the comb teeth 72 at the other end in the Y direction (i.e., the second direction) is formed on both sides in the X direction of the comb tooth member 70. That is, the first protrusion 741 is formed in a manner extending from the comb teeth 72 at one end in the Y direction (i.e., the second direction) to the comb teeth 72 at the other end in the Y direction (i.e., the second direction).

[0157] Thus, when shaving the beard H (ie, an example of body hair), the contact between the skin S and the outer blade 415 can be more reliably suppressed, and the irritation to the skin S can be further reduced.

[0158] In addition, in the present embodiment, the positions of the mutually communicating grooves 75 and the outer slits 416 in the Y direction (i.e., the second direction) are the same. Thus, when shaving the beards H (i.e., an example of body hair), it is possible to more reliably prevent the beards H (i.e., an example of body hair) introduced into the grooves 75 from being caught by the outer blades 415 of the slit outer blade 40 and being unable to be cut.

[0159] Furthermore, in this embodiment, if Figure 7As shown in FIG. 1 , the groove 75 is formed so that the width W2 in the Y direction (i.e., the second direction) becomes substantially constant, and the outer slit 416 is formed so that the width W1 in the Y direction (i.e., the second direction) becomes substantially constant. Furthermore, the width W2 of the groove 75 in the Y direction (i.e., the second direction) becomes the same size as the width W1 of the outer slit 416 in the Y direction (i.e., the second direction).

[0160] Therefore, in this embodiment, the width W2a of the groove 75 on the outer slit 416 side in the Y direction (ie, the second direction) is the same as the width W1a of the outer slit 416 on the groove 75 side in the Y direction (ie, the second direction).

[0161] Furthermore, the groove 75 and the outer slit 416 are connected to each other so that one end in the Y direction (i.e., the second direction) is at the same position and the other end in the Y direction (i.e., the second direction) is at the same position when viewed from the front (i.e., when viewed along the X direction).

[0162] Thus, the beard H (ie, an example of body hair) introduced into the groove portion 75 can be more effectively introduced into the outer slit 416 .

[0163] In addition, in the present embodiment, the upper outer blade 4151 includes: a first piece 41511, which is arranged on one side in the X direction and extends in the X direction; and a second piece 41512, which is arranged on the other side in the X direction at a position offset from the first piece 41511 in the Y direction and extends in the X direction. In addition, the upper outer blade 4151 includes a connecting piece 41513, which extends in an inclined direction intersecting the X direction and connects the first piece 41511 and the second piece 41512 together.

[0164] That is, the outer blade 415 becomes a shape in which one end 415a and the other end 415b on the X direction (i.e. the first direction) are staggered on the Y direction (i.e. the second direction). Like this, in the present embodiment, the outer blade 415 at one end on the X direction (i.e. the first direction) and the outer blade 415 at the other end are staggered on the Y direction (i.e. the second direction).

[0165] Therefore, in this embodiment, the outer slits 416 defined by the outer blades 415 adjacent to each other in the Y direction are also formed in a shape in which one end in the X direction (ie, the first direction) and the other end are offset in the Y direction (ie, the second direction).

[0166] Thus, when the beard H (i.e., an example of body hair) is shaved while reciprocating in the X direction (i.e., the first direction), the beard H (i.e., an example of body hair) that is caught by the outer blade 415 and cannot be introduced into the outer slit 416 when moving in one direction can be introduced into the outer slit 416 when moving in the other direction. That is, when the beard H (i.e., an example of body hair) is shaved while reciprocating in the X direction (i.e., the first direction), the beard H (i.e., an example of body hair) can be shaved more efficiently.

[0167] In addition, in the present embodiment, the comb teeth 72 on one side in the X direction (i.e., the first direction) are formed so that the position in the Y direction (i.e., the second direction) is the same as the position in the Y direction (i.e., the second direction) of one end 415a in the X direction (i.e., the first direction) of the outer blade 415. And, the comb teeth 72 on the other side in the X direction (i.e., the first direction) are formed so that the position in the Y direction (i.e., the second direction) is the same as the position in the Y direction (i.e., the second direction) of the other end 415b in the X direction (i.e., the first direction) of the outer blade 415.

[0168] Therefore, in the present embodiment, the groove portion 75 connected to one outer slit 416 is also formed at one end side and the other end side in the X direction (i.e., the first direction) at positions offset in the Y direction (i.e., the second direction). Thus, the beard H (i.e., an example of body hair) introduced into the groove portion 75 can be introduced into the outer slit 416 more effectively.

[0169] Figure 8 The diagram schematically shows a plurality of examples of arrangement patterns of the outer slits 416 of the slit outer blade 40 and the grooves 75 of the comb-tooth member 70 . Fig. 9 Yes means Figure 8 A top view of the specific structure of mode B is shown. Fig.10 Yes means Figure 8 As a method of configuring the groove portion 75 so as to communicate with the outer slit 416, for example, Figure 8 As shown, consider using the methods of mode A, mode B, mode C, mode D, and mode E for configuration. Figure 8 In each pattern, the upper solid line portion represents the comb teeth 72 , the upper dotted line portion represents the groove portion 75 , the lower solid line portion represents the outer blade 415 , and the lower dotted line portion represents the outer slit 416 .

[0170] In this embodiment, if Figure 7 As shown, the configuration using the method of mode A is exemplified. However, the configuration method in which the groove portion 75 is connected to the outer slit 416 does not necessarily have to be configured using the method of mode A, but Fig. 9 As shown, the configuration can also be performed using the method of mode B.

[0171] In the method of mode B, if Fig. 9 As shown in FIG. 1 , the groove 75 is formed so that the width W2 in the Y direction (i.e., the second direction) becomes substantially constant, and the outer slit 416 is formed so that the width W1 in the Y direction (i.e., the second direction) becomes substantially constant. Furthermore, the width W2 of the groove 75 in the Y direction (i.e., the second direction) is smaller than the width W1 of the outer slit 416 in the Y direction (i.e., the second direction). Furthermore, the groove 75 and the outer slit 416 are connected to each other in a state where both ends of the groove 75 in the Y direction are located between one end and the other end of the outer slit 416 in the Y direction when viewed from the front (i.e., when viewed along the X direction).

[0172] Thus, the beard H (ie, an example of body hair) introduced into the groove portion 75 can be more reliably introduced into the outer slit 416 .

[0173] In addition, if Fig.10 As shown, the configuration can also be performed using the method of mode C.

[0174] In the method of mode C, if Fig.10 As shown in FIG. 1 , the groove portion 75 is formed in such a manner that the width W2 in the Y direction (i.e., the second direction) is different at one end and the other end in the X direction. Specifically, the width W2b of the groove portion 75 in the Y direction (i.e., the second direction) on the side opposite to the outer slit 416 side is larger than the width W2a of the groove portion 75 in the Y direction (i.e., the second direction) on the outer slit 416 side.

[0175] In addition, the outer slit 416 is formed so that the width W1 in the Y direction (i.e., the second direction) becomes substantially constant. Furthermore, the width W2a of the groove portion 75 in the Y direction (i.e., the second direction) on the outer slit 416 side becomes the same size as the width W1a of the outer slit 416 in the Y direction (i.e., the second direction) on the groove portion 75 side.

[0176] Furthermore, the groove portion 75 and the outer slit 416 are connected to each other in a state where, when viewed from the front (i.e., when viewed along the X direction), one end of the groove portion 75 on the outer slit 416 side in the Y direction (i.e., the second direction) and one end of the outer slit 416 on the groove portion 75 side in the Y direction (i.e., the second direction) are at the same position, and the other end of the groove portion 75 on the outer slit 416 side in the Y direction (i.e., the second direction) and the other end of the outer slit 416 on the groove portion 75 side in the Y direction (i.e., the second direction) are at the same position.

[0177] This can also improve the efficiency of introducing the beard H (ie, an example of body hair) into the groove portion 75 and more effectively introduce the beard H (ie, an example of body hair) introduced into the groove portion 75 into the outer slit 416 .

[0178] Alternatively, configuration can be performed using the method of mode D.

[0179] In the method of mode D, the groove portion 75 is formed so that the width W2 in the Y direction (i.e., the second direction) becomes substantially constant, and the outer slit 416 is formed so that the width W1 in the Y direction (i.e., the second direction) becomes substantially constant. In addition, the width W2 of the groove portion 75 in the Y direction (i.e., the second direction) is larger than the width W1 of the outer slit 416 in the Y direction (i.e., the second direction). Furthermore, the groove portion 75 and the outer slit 416 are connected to each other in a state where both ends of the outer slit 416 in the Y direction are located between one end and the other end of the groove portion 75 in the Y direction when viewed from the front (i.e., when viewed along the X direction).

[0180] Alternatively, configuration can be performed using the method of Mode E.

[0181] In the method of mode E, the groove portion 75 is formed so that the width W2 in the Y direction (i.e., the second direction) becomes substantially constant, and the outer slit 416 is formed so that the width W1 in the Y direction (i.e., the second direction) becomes substantially constant. In addition, the width W2 of the groove portion 75 in the Y direction (i.e., the second direction) becomes the same size as the width W1 of the outer slit 416 in the Y direction (i.e., the second direction). Furthermore, the groove portion 75 and the outer slit 416 are connected to each other in a state where a part of the outer slit 416 and a part of the groove portion 75 overlap each other when viewed from the front (i.e., when viewed along the X direction).

[0182] In addition, the groove portion 75 and the outer slit 416 may be arranged to communicate with each other by a method other than the modes A to E.

[0183] In addition, in the present embodiment, the case where the first protrusion 741 extending from one end in the Y direction of the slit outer knife portion 413 to the other end is provided on the comb teeth 72 is illustrated, but the method of providing the first protrusion 741 on the comb teeth 72 is not limited to such a method, and the first protrusion 741 can be provided on the comb teeth 72 using various methods.

[0184] Fig.11 It is a perspective view showing a first modified example of the comb-tooth member 70 in the embodiment. Fig.12 It is a plan view showing a first modified example of the comb-tooth member 70 in the embodiment. Fig.13 It is a perspective view showing a second modified example of the comb-tooth member 70 in the embodiment. Fig.14 2 is a top view showing a second modified example of the comb tooth member 70 according to the embodiment. Fig.11 and Fig.12As shown, the protrusion 74 formed to protrude outward from the upper end of the support portion 73 in the X direction has a plurality of first protrusions 741 extending across two support portions 73 (ie, one element of the comb teeth 72 ) arranged in the Y direction (ie, the second direction).

[0185] This can further reduce the irritation to the skin S.

[0186] In addition, Fig.11 and Fig.12 In the example, a partition wall 76 is formed between the first protrusions 741 adjacent in the Y direction (ie, the second direction) to divide the outer side of the groove 75 in the X direction (ie, the first direction), but it is also possible to Fig.13 and Fig.14 As shown, the partition wall 76 that partitions the outer side of the groove portion 75 in the X direction (ie, the first direction) is not formed between the first protrusions 741 adjacent to each other in the Y direction (ie, the second direction).

[0187] If set to Fig.13 and Fig.14 With the structure shown, it is possible to suppress a decrease in the efficiency of introducing the beard H (ie, an example of body hair) into the groove portion 75 .

[0188] Furthermore, a plurality of first protrusions 741 having different lengths in the Y direction may be provided on the support portion 73 (ie, an element of the comb teeth 72 ), and at least one of the shape and arrangement position of the first protrusion 741 may be different on one side and the other side in the X direction.

[0189] Next, the specific structure of the groove portion 75 of this embodiment will be described. Fig.15 This is a cross-sectional view obtained by cutting the slit outer blade body 410 and the comb-tooth member 70 at a position corresponding to the groove portion 75 in a state where the slit outer blade body 410 in the embodiment is attached to the comb-tooth member 70 . Fig.16 yes Fig.15 AA section view. Fig.17 1 is a diagram schematically showing a state in which the beard H is introduced into the groove portion 75 of the slit blade block 30 in the embodiment.

[0190] In this embodiment, if Fig.15 As shown in the figure, a partition wall 76 is formed between the comb teeth 72 adjacent in the Y direction (i.e., the second direction). Thus, the rigidity of the comb teeth 72 can be improved. In addition, the inner surface 761 on the inner side in the X direction (i.e., the first direction) of the partition wall 76 divides the outer side in the X direction (i.e., the first direction) of the groove portion 75. And, the inner surface 761 is inclined in such a manner that the depth of the groove portion 75 becomes deeper as it goes toward the slit outer blade 40 side.

[0191] Thus, in the present embodiment, the groove portion 75 is formed into a substantially right triangle whose outer side in the X direction (ie, the first direction) is the hypotenuse when viewed from the side (ie, viewed along the Y direction).

[0192] Thus, the area of ​​the opening 751 of the groove 75 is ensured, and the volume of the groove 75 is reduced. Fig.17 As shown, the introduction property of the beard H (ie, an example of body hair) into the groove portion 75 can be improved, and the reduction in the rigidity of the comb teeth 72 can be more reliably suppressed.

[0193] In the present embodiment, when viewed along the Y direction (ie, the second direction), the end portion 7611 of the inner surface 761 of the partition wall 76 on the opening 751 side of the groove portion 75 is curved in an arc shape.

[0194] In this way, it is possible to prevent the formation of a blade at the end 7611 of the inner surface 761 on the opening 751 side, which is a part that is likely to come into contact with the skin S when the beard H (i.e., an example of body hair) is introduced into the groove 75, thereby further reducing the irritation to the skin S.

[0195] In addition, if Fig.15 and Fig.16 As shown, the groove 75 is formed so that the lower end 752 is located below the lower end 41621 of the outer slit 4162 (i.e., the second slit). That is, the groove 75 is formed so that the depth is less than the lower end 41621 of the outer slit 4162 (i.e., the second slit) when the opening 751 side faces upward.

[0196] Furthermore, in this embodiment, if Fig.16 As shown, the lower end 752 of the groove portion 75 has a depth from one end to the other end in the Y direction that is below the lower end 41621 of the outer slit 4162 (ie, the second slit).

[0197] Furthermore, in a front view (ie, in a state of being viewed along the X direction), the comb teeth 72 are not exposed in the outer slits 4162 (ie, the second slits).

[0198] Thus, when the beard H (i.e., an example of body hair) introduced into the groove portion 75 is introduced into the outer slit 416, the space of the outer slit 4162 (i.e., the second slit) can be effectively used, and the beard H (i.e., an example of body hair) introduced into the groove portion 75 can be introduced into the outer slit 416 more effectively.

[0199] In addition, in this embodiment, the comb teeth 72 have a curved surface 722 that protrudes outward in the X direction (i.e., the first direction) when the opening 751 side of the groove 75 is facing upward and observed along the Y direction (i.e., the second direction), and a flat surface 721 that is continuously arranged with the upper end of the curved surface 722 and extends horizontally.

[0200] Furthermore, the groove 75 is formed in such a manner that the outer end 753 of the opening 751 side of the groove 75 in the X direction (i.e., the first direction) is located on the flat surface 721 when the opening 751 side of the groove 75 faces upward and is observed along the Y direction (i.e., the second direction).

[0201] Such a groove portion 75 can be obtained, for example, by forming the inner surface 761 to be included in a plane intersecting the flat surface 721 .

[0202] Thus, the groove portion 75 can be formed while maintaining a state in which the area of ​​the portion, i.e., the curved surface 722, which comes into contact with the user's skin S when shaving the beard H (i.e., an example of body hair) is increased, and a reduction in the performance of introducing the beard H (i.e., an example of body hair) into the groove portion 75 can be minimized, and the irritation to the skin S can be further reduced.

[0203] Fig.18 2 is a cross-sectional view showing a third modified example of the comb tooth member 70 in the embodiment. Fig.18 As shown, the groove portion 75 may be formed in such a manner that when the opening 751 side of the groove portion 75 is facing upward and observed along the Y direction (i.e., the second direction), the outer end 753 of the opening 751 side of the groove portion 75 in the X direction (i.e., the first direction) is located on the curved surface 722 which is higher than the top 7221.

[0204] Such a groove portion 75 can be obtained, for example, by forming the inner surface 761 to be included in a plane intersecting the curved surface 722 on the upper side of the top portion 7221 .

[0205] In this way, the opening area of ​​the groove 75 can be increased, and the portion that comes into contact with the user's skin S when shaving the beard H (i.e., an example of body hair), namely the curved surface 722, can minimize the irritation to the skin S and improve the introduction performance of the beard H (i.e., an example of body hair) into the groove 75.

[0206] [Function, Effect]

[0207] Hereinafter, characteristic structures of the slit blade block and the electric shaver shown in the above-mentioned embodiment and its modified examples and effects obtained thereby will be described.

[0208] The slit knife block 30 shown in the above-mentioned embodiment and its modified example includes a slit outer knife 40, which has a plurality of outer blades 415 extending in the X direction (i.e., the first direction) and arranged separately in the Y direction (i.e., the second direction) intersecting the X direction (i.e., the first direction). In addition, the slit knife block 30 includes a plurality of comb teeth 72 arranged at a position outside the slit outer knife 40 in the X direction (i.e., the first direction) and arranged separately in the Y direction (i.e., the second direction).

[0209] Here, outer slits 416 are formed between outer blades 415 adjacent in the Y direction (ie, the second direction), and grooves 75 communicating with the outer slits 416 are formed between comb teeth 72 adjacent in the Y direction (ie, the second direction).

[0210] The comb teeth 72 are provided with protrusions 74 protruding outward in the X direction (ie, the first direction). The protrusions 74 include first protrusions 741 extending across two or more comb teeth 72 arranged in the Y direction (ie, the second direction).

[0211] Furthermore, the electric shaver 1 shown in the above-described embodiment and its modified example includes a slit blade block 30 .

[0212] Thus, when the slit blade block 30 having the comb teeth 72 is used to shave the beard H (an example of body hair), the introduction of the beard H (an example of body hair) can be improved without changing the size of the interval between the outer blades 415 of the slit outer blade 40.

[0213] In addition, if the comb teeth 72 are provided with a first protrusion 741 having a wider width in the Y direction (i.e., the second direction), the first protrusion 741 having a wider width can be brought into contact with the user's skin S when shaving the beard H (i.e., an example of body hair), thereby further reducing the irritation to the skin S.

[0214] Thus, by using the slit blade block 30 and the electric shaver 1 shown in the above-mentioned embodiment and its modified example, it is possible to shave the beard H (an example of body hair) more efficiently while suppressing irritation to the skin S.

[0215] In addition, the position of the groove portion 75 in the Y direction (ie, the second direction) and the position of the outer slit 416 in the Y direction (ie, the second direction) may be the same.

[0216] Thus, it is possible to more reliably prevent the beard H (i.e., an example of body hair) introduced into the groove portion 75 from being caught by the outer blade 415 of the slit outer blade 40 and unable to be cut when shaving the beard H (i.e., an example of body hair). As a result, the beard H (i.e., an example of body hair) introduced into the groove portion 75 can be directly cut, and the beard H (i.e., an example of body hair) can be shaved more efficiently.

[0217] Alternatively, the width W2a of the groove 75 on the outer slit 416 side in the Y direction (ie, the second direction) may be the same as the width W1a of the outer slit 416 on the groove 75 side in the Y direction (ie, the second direction).

[0218] In this way, the beard H (ie, an example of body hair) introduced into the groove portion 75 can be more effectively introduced into the outer slit 416, and the beard H (ie, an example of body hair) can be shaved more efficiently.

[0219] Alternatively, the width W2b of the groove 75 in the Y direction (ie, the second direction) on the side opposite to the outer slit 416 may be greater than the width W2a of the groove 75 in the Y direction (ie, the second direction) on the outer slit 416 side.

[0220] Thus, the efficiency of introducing the beard H (i.e., an example of body hair) into the groove 75 can be improved, and the beard H (i.e., an example of body hair) introduced into the groove 75 can be more effectively introduced into the outer slit 416. As a result, the beard H (i.e., an example of body hair) can be shaved more efficiently.

[0221] In addition, the outer blade 415 at one end in the X direction (ie, the first direction) and the outer blade 415 at the other end may be offset in the Y direction (ie, the second direction).

[0222] Thus, when the beard H (i.e., an example of body hair) is shaved while reciprocating in the X direction (i.e., the first direction), the beard H (i.e., an example of body hair) that is caught by the outer blade 415 and cannot be introduced into the outer slit 416 when moving in one direction can be introduced into the outer slit 416 when moving in the other direction. Therefore, when the beard H (i.e., an example of body hair) is shaved while reciprocating in the X direction (i.e., the first direction), the beard H (i.e., an example of body hair) can be shaved more efficiently.

[0223] In addition, the comb teeth 72 may be provided on both sides in the X direction (i.e., the first direction), and the comb teeth 72 on one side in the X direction (i.e., the first direction) may be formed so that the position in the Y direction (i.e., the second direction) is the same as the position in the Y direction (i.e., the second direction) of one end 415a in the X direction (i.e., the first direction) of the outer blade 415. Furthermore, the comb teeth 72 on the other side in the X direction (i.e., the first direction) may be formed so that the position in the Y direction (i.e., the second direction) is the same as the position in the Y direction (i.e., the second direction) of the other end 415b in the X direction (i.e., the first direction) of the outer blade 415.

[0224] In this way, the beard H (ie, an example of body hair) introduced into the groove portion 75 can be more effectively introduced into the outer slit 416, and the beard H (ie, an example of body hair) can be shaved more efficiently.

[0225] Alternatively, the first protrusion 741 may be formed to extend from the comb teeth 72 located at one end in the Y direction (ie, the second direction) to the comb teeth 72 located at the other end in the Y direction (ie, the second direction).

[0226] In this way, when shaving the beard H (ie, an example of body hair), the contact between the skin S and the outer blade 415 can be more reliably suppressed, so that the irritation to the skin S can be further reduced.

[0227] In addition, a partition wall 76 may be formed between the comb teeth 72 adjacent to each other in the Y direction (i.e., the second direction), and an inner surface 761 of the partition wall 76 on the inner side in the X direction (i.e., the first direction) divides the outer side in the X direction (i.e., the first direction) of the groove portion 75. Furthermore, the inner surface 761 may be inclined in such a manner that the depth of the groove portion 75 becomes deeper as it goes toward the slit outer blade 40 side.

[0228] In this way, the opening area of ​​the groove 75 can be ensured to improve the introduction of the beard H (ie, an example of body hair), and the volume of the groove 75 can be reduced. As a result, the rigidity of the comb teeth 72 can be more reliably suppressed from being reduced.

[0229] Furthermore, when viewed along the Y direction (ie, the second direction), the end portion 7611 of the inner surface 761 on the opening 751 side of the groove portion 75 may be curved in an arc shape.

[0230] This can more reliably prevent the edge 7611 of the inner surface 761 on the opening 751 side from forming a blade when the beard H (i.e., an example of body hair) is introduced into the groove 75. As a result, the irritation to the skin S can be further reduced.

[0231] In addition, the slit outer blade 40 may include: a top wall 411 (i.e., a first wall portion) having a skin contact surface 4111 capable of contacting the skin S; and a side wall 412 (i.e., a second wall portion) provided continuously with the top wall 411 (i.e., the first wall portion). Furthermore, the outer slit 416 may include: an outer upper slit 4161 (i.e., a first slit) formed on the top wall 411 (i.e., the first wall portion); and an outer slit 4162 (i.e., a second slit) formed on the side wall 412 (i.e., the second wall portion) in a manner connected to the outer upper slit 4161 (i.e., the first slit). Furthermore, the groove portion 75 may be formed to have a depth that is less than the lower end 41621 of the outer slit 4162 (i.e., the second slit) when the opening 751 side faces upward.

[0232] In this way, when the beard H (i.e., an example of body hair) introduced into the groove portion 75 is introduced into the outer slit 416, the space of the outer slit 4162 (i.e., the second slit) can be effectively used, so the beard H (i.e., an example of body hair) introduced into the groove portion 75 can be introduced into the outer slit 416 more effectively.

[0233] Furthermore, the protrusion 74 may have a shape that is curved so as to be convex outward in the X direction (ie, the first direction) when viewed along the Y direction (ie, the second direction).

[0234] In this way, when shaving the beard H (ie, an example of body hair), the curved portion of the protrusion 74 comes into contact with the user's skin S, so that the irritation to the skin S can be further reduced.

[0235] In addition, the comb teeth 72 may include a curved surface 722 that protrudes outward in the X direction (i.e., the first direction) when the opening 751 side of the groove 75 faces upward and is viewed along the Y direction (i.e., the second direction), and a flat surface 721 that is continuously provided with the upper end of the curved surface 722 and extends horizontally. Furthermore, when the opening 751 side of the groove 75 faces upward and is viewed along the Y direction (i.e., the second direction), an end portion 753 on the outer side of the opening 751 side of the groove 75 in the X direction (i.e., the first direction) may be located on the flat surface 721.

[0236] In this way, the groove 75 can be formed while maintaining a state in which the area of ​​the curved surface 722 that contacts the user's skin S when shaving the beard H (i.e., an example of body hair) is increased. As a result, the reduction in the performance of introducing the beard H (i.e., an example of body hair) into the groove 75 can be suppressed as much as possible, and the irritation to the skin S can be further reduced.

[0237] In addition, the comb teeth 72 may include a curved surface 722 that protrudes outward in the X direction (i.e., the first direction) when the opening 751 side of the groove 75 faces upward and is viewed along the Y direction (i.e., the second direction), and a flat surface 721 that is continuously provided with the upper end of the curved surface 722 and extends horizontally. Furthermore, when the opening 751 side of the groove 75 faces upward and is viewed along the Y direction (i.e., the second direction), an end portion 753 on the outer side of the opening 751 side of the groove 75 in the X direction (i.e., the first direction) may be located on the curved surface 722 above the top portion 7221.

[0238] In this way, the opening area of ​​the groove 75 can be increased, and the curved surface 722, which is the portion that contacts the user's skin S when shaving the beard H (i.e., an example of body hair), can be ensured. As a result, the irritation to the skin S can be minimized, and the introduction performance of the beard H (i.e., an example of body hair) into the groove 75 can be improved.

[0239] [other]

[0240] As mentioned above, the contents of the slit blade block and the electric shaver of the present disclosure have been described, but it is not limited to the above description, and it is obvious to those skilled in the art that various modifications and improvements can be made.

[0241] For example, the present disclosure can be applied to embodiments obtained by changing, replacing, adding, omitting, etc. the structures shown in the above-mentioned embodiments and their modifications. In addition, the components described in the above-mentioned embodiments and their modifications can be combined to form new embodiments.

[0242] Furthermore, in the above-described embodiment and its modified example, the electric shaver 1 including the handle portion 11 and the head portion 12 is exemplified, but the present disclosure can also be applied to an electric shaver not provided with a head portion.

[0243] In addition, the specifications of the outer blade, inner blade, and other details (shape, size, layout, etc.) can also be changed appropriately.

[0244] Industrial Applicability

[0245] As described above, the slit blade block and electric shaver of the present disclosure can shave body hair more efficiently while suppressing irritation to the skin, and therefore are not limited to beard treatment but can be applied to various body hair treatments and the like.

[0246] Description of Reference Numerals

[0247] 1. Electric razor; 10. Razor body; 11. Handle; 111. Main body shell; 111a. Power switch; 12. Head; 121. Head body; 121a. Release button; 122. Head cover; 122a. Upper opening; 13. Drive rod; 20. Blade unit; 200. Outer blade box; 20a. Skin contact surface; 21. First blade block; 211. First mesh blade; 212. First inner blade; 22. Second blade block; 221. Second mesh blade; 23. Outer blade shell; 23a. Release button; 30. Slit blade block; 40. Slit outer blade; 410. Slit outer blade body; 411. Top wall; 4111. Skin contact surface; 4112. Inner surface; 412. Side wall; 4121. First melting 4122, second welding fixing part; 4123, first claw piece; 4124, second claw piece; 4125, fitting hole; 413, slit outer blade part; 414, connecting part; 415, outer blade; 415a, one end; 415b, the other end; 4151, upper outer blade; 41511, first sheet; 41512, second sheet; 4152, side outer blade; 416, outer slit; 4161, outer upper slit; 4162, outer slit; 41621, lower end; 4163, outer internal space; 420, outer blade joint; 421, joint body; 422, loading part; 4221, outer square part; 4222, inner square part; 423, protrusion; 424, first welding part; 425, second welding part; 426, spring mounting part; 50, slit inner knife; 510, slit inner knife body; 511, top wall; 5111, upper surface; 512, side wall; 5121, positioning part; 5122, welding fixing part; 513, slit inner knife part; 514, connecting part; 515, inner blade; 5151, upper inner blade; 5152, side inner blade; 516, inner slit; 5161, inner upper slit; 5162, inner slit; 5163, inner internal space; 520, inner knife joint; 521, joint body; 522, fitting recess; 523, positioning part; 524, welding part; 525, spring mounting part; 60, coil spring; 70, comb tooth component; 71, comb tooth supporting wall; 710, Support wall body; 711, first through hole; 712, second through hole; 713, fitting protrusion; 72, comb teeth; 721, flat surface; 722, curved surface; 7221, top; 73, support portion; 74, protrusion; 741, first protrusion; 75, groove; 751, opening; 752, lower end; 753, end; 76, partition wall; 761, inner surface; 7611, end; 77, comb tooth end wall; 771, end wall body; 772, protrusion; S, skin; H, beard; W1a, width of the slit in the second direction on the groove side; W2a, width of the groove in the second direction on the slit side; W2b, width of the groove in the second direction on the side opposite to the slit side; X, first direction;Y, second direction. ;

Claims

1. A slit knife assembly, wherein: The slit knife module has: a slit outer blade having a plurality of outer blades extending in a first direction and arranged separately in a second direction intersecting the first direction; and a plurality of comb teeth, the plurality of comb teeth being arranged at a position outside the slit outer blade in the first direction and being separated and arranged along the second direction, An outer slit is formed between the outer blades adjacent to each other in the second direction, A groove portion communicating with the outer slit is formed between the comb teeth adjacent to each other along the second direction, The comb teeth are provided with a protrusion protruding outward in the first direction. The protrusion includes a first protrusion extending across two or more comb teeth arranged in the second direction.

2. The slit knife assembly according to claim 1, wherein: The position of the groove in the second direction is the same as the position of the outer slit in the second direction.

3. The slit knife assembly according to claim 1 or 2, wherein: The width of the groove portion in the second direction on the outer slit side is the same as the width of the outer slit in the second direction on the groove portion side.

4. The slit knife assembly according to claim 3, wherein: A width of the groove portion in the second direction on a side opposite to the outer slit side is greater than a width of the groove portion in the second direction on the outer slit side.

5. The slit knife block according to any one of claims 1 to 4, wherein: The outer blade at one end in the first direction and the outer blade at the other end are staggered in the second direction.

6. The slit knife assembly according to claim 5, wherein: The comb teeth are arranged on both sides in the first direction, The comb teeth on one side in the first direction are formed so that their positions in the second direction are the same as the positions in the second direction of one end of the outer blade in the first direction. The comb teeth on the other side in the first direction are formed so that the position thereof in the second direction is the same as the position of the other end of the outer blade in the first direction in the second direction.

7. The slit knife block according to any one of claims 1 to 6, wherein: The first protrusion is formed to extend from comb teeth located at one end in the second direction to comb teeth located at the other end in the second direction.

8. The slit blade assembly according to any one of claims 1 to 7, wherein: A partition wall is formed between the comb teeth adjacent to each other along the second direction, The inner surface of the partition wall on the inner side in the first direction defines the outer side of the groove portion in the first direction. The inner surface is inclined so that the depth of the groove portion increases toward the slit outer blade side.

9. The slit knife assembly according to claim 8, wherein: When viewed along the second direction, an end portion of the inner surface on the opening side of the groove portion is curved in an arc shape.

10. The slit knife block according to any one of claims 1 to 9, wherein: The slit outer blade comprises: a first wall portion having a skin contact surface capable of contacting the skin; and a second wall portion provided continuously with the first wall portion. The outer slit includes: a first slit formed in the first wall portion; and a second slit formed in the second wall portion in a manner communicating with the first slit. The groove portion is formed to have a depth that is lower than a lower end of the second slit when the opening side faces upward.

11. The slit blade assembly according to any one of claims 1 to 10, wherein: The protrusion has a shape that is curved so as to be convex outward in the first direction when viewed along the second direction.

12. The slit knife block according to any one of claims 1 to 11, wherein: The comb teeth include a curved surface that is convex outward in the first direction when viewed along the second direction with the opening side of the groove facing upward, and a flat surface that is continuously provided with an upper end of the curved surface and extends horizontally. When the opening side of the groove portion faces upward and is viewed along the second direction, an outer end portion of the opening side of the groove portion in the first direction is located on the flat surface.

13. The slit knife block according to any one of claims 1 to 11, wherein: The comb teeth include a curved surface that is convex outward in the first direction when viewed along the second direction with the opening side of the groove facing upward, and a flat surface that is continuously provided with an upper end of the curved surface and extends horizontally. When the opening side of the groove portion faces upward and is viewed along the second direction, an outer end portion of the opening side of the groove portion in the first direction is located on the curved surface above the top portion.

14. An electric shaver, wherein: This electric shaver includes the slit blade block according to any one of claims 1 to 13.

Images