JP2013090665A - Electric razor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric razor having a slit blade, as a screen, with a structure hard to deform.SOLUTION: The electric razor 1 has the slit blade as the screen 90. The screen 90 has an intermediate slit width SA, as the width of an intermediate part 93A of a slit, the intermediate slit width is smaller than an intermediate blade width BA, as the width of an intermediate part 94A of a blade. The blade intermediate part 94A has a linear shape as a whole.

Description

  The present invention relates to an electric razor having an inner blade and an outer blade that relatively reciprocate linearly.

  The electric razor of patent document 1 has a slit blade as an outer blade.

JP-A-2005-349128

In general, the slit blade has a small strength of the blade portion. For this reason, there is a possibility that the blade portion of the electric razor of Patent Document 1 is deformed during use.
In order to solve the above-described problems, an object of the present invention is to provide an electric razor having a structure in which a slit blade as an outer blade is hardly deformed.

  The electric razor according to the present invention is an electric razor having an inner blade and an outer blade that reciprocally move linearly, and has only a slit blade having a plurality of slits and a plurality of blade portions as the outer blade, The direction of linear motion is the vertical direction, the size of the blade in the vertical direction is the blade width, the size of the slit in the vertical direction is the slit width, and is orthogonal to the vertical direction in plan view of the outer blade The slit width is smaller than the blade width, and the blade portion has two blade end portions that are both end portions in the horizontal direction, and one of the blade end portions and the blade end. It has the blade intermediate part located between the other of the parts, and this blade intermediate part is characterized by having a linear shape.

  This electric razor has the slit having two slit end portions which are both end portions in the lateral direction, and a slit intermediate portion located between one of the slit end portions and the other of the slit end portions. And it is preferable that the said slit width of the said slit edge part is larger than the said slit width of the said slit intermediate part.

-As for this electric razor, it is preferable that the said slit width of the said slit edge part is larger than the said blade width of the said blade edge part.
In the electric razor, the inner blade has two inner blade end portions that are both end portions in the lateral direction, and the blade intermediate portion extends from one of the inner blade end portions in the lateral direction to the inner edge. It is preferable to overlap with the portion up to the other end of the blade end.

-As for this electric shaver, it is preferable that the thickness of the said blade intermediate part is smaller than the thickness of the said blade edge part.
-In this electric razor, the inner blade moves in a range from a maximum pushing position to a maximum pulling position via a neutral position with respect to the outer blade, and the maximum pushing position is determined by the inner blade in the longitudinal direction. The position when moving to the most push side position with respect to the outer blade is shown, and the maximum pulling position is when the inner blade moves to the position closest to the outer blade in the vertical direction. The neutral position indicates a neutral position between the maximum pushing position and the maximum pulling position, and each of the plurality of slits positioned at the end in the vertical direction is an end slit. It is preferable that all the blade portions positioned between one end slit and the other end slit overlap the blade portions of the inner blade in a plan view of the outer blade.

  In the electric razor, the blade end portion has an inclined portion and a straight portion that are sequentially located from the center side toward the outside in the lateral direction, and the blade width of the inclined portion is directed outward in the lateral direction. It is preferable that the blade width of the straight portion gradually decreases and the blade width of the straight portion has a constant size in the lateral direction.

  -This electric razor has the main body which supports the said outer blade and the said inner blade, and it is preferable that the longitudinal direction of the said body corresponds with the said vertical direction in the planar view of the said outer blade.

  The present invention can provide an electric razor having a structure in which a slit blade as an outer blade is not easily deformed.

1A is a perspective view showing a perspective structure of a state in which a cap is removed from an apparatus main body, and FIG. 2B is a perspective view of a state in which the cap is attached to the apparatus main body. Perspective view. (A) is a side view which shows the side structure, (b) is sectional drawing which shows the cross-sectional structure about the electric shaver of the embodiment. The disassembled perspective view which shows the disassembled perspective structure of an apparatus main body about the electric shaver of the embodiment. The exploded perspective view which shows the exploded perspective structure of a head part about the electric shaver of the embodiment. The disassembled perspective view which shows the disassembled perspective structure of a blade block about the electric shaver of the embodiment. About the electric shaver of the embodiment, (a) is a front view showing the front structure of the outer cutter, (b) is a plan view showing the planar structure of the outer cutter, and (c) is along the DA-DA line of (a). Sectional drawing which shows sectional structure, (d) is a top view which expands and shows area | region RA of (b). About the electric shaver of the embodiment, (a) is a front view showing the front structure of the outer blade holding portion, (b) is a plan view showing the planar structure of the outer blade holding portion, and (c) is an arrow indicating the outer blade holding portion. The side view which shows the side structure when it sees from AC, (d) is a side view which shows the side structure when the outer blade holding | maintenance part is seen from arrow AD. About the electric shaver of the embodiment, (a) is a front view showing the front structure of the inner blade, (b) is a plan view showing the planar structure of the inner blade, and (c) is a cross section along the DB-DB line of the inner blade. Sectional drawing which shows a structure. About the electric shaver of the embodiment, (a) is a front view showing the front structure of the inner blade holding part, (b) is a plan view showing the planar structure of the inner blade holding part, and (c) is a DC of the outer blade holding part. -Sectional drawing which shows the cross-section along a DC line. The front view which shows the front structure of the outer blade holding | maintenance part to which the outer blade was attached about the electric razor of the embodiment. The front view which shows the front structure of the inner blade holding | maintenance part to which the inner blade was attached about the electric razor of the embodiment. The perspective view which shows the perspective structure of a blade block about the electric shaver of the embodiment. About the electric shaver of the embodiment, (a) is a plan view showing the planar structure of the blade block, (b) is a sectional view showing a sectional structure along the DD-DD line of (a), and (c) is (b). Sectional drawing which expands and shows a part of. (A) is a perspective view which shows the perspective structure of a head part, (b) is a top view which shows the planar structure of a head part about the electric shaver of the embodiment. About the electric shaver of the embodiment, (a) is sectional drawing which shows a part of apparatus main body and the expanded sectional structure of a head part, (b) is a front view which shows the front structure of a head link. Regarding the electric razor of the embodiment, (a) is a cross-sectional view showing a cross-sectional structure in which the blade block is omitted from the head portion of FIG. 6, and (b) is an output shaft of the electric motor from the state (a). Sectional view showing the sectional structure in a state rotated by 90 °, (c) is a plan view schematically showing the relationship on the ZA-ZC plane of the driving device and the conversion mechanism in the state of (a), and (d) is the same. The top view which shows typically the relationship on the ZA-ZC plane of the drive device and conversion mechanism in the state of (c). About the electric shaver of the embodiment, (a) is a cross-sectional view showing a cross-sectional structure in a state where the output shaft of the electric motor is rotated by 90 ° from the state of FIG. 7 (a), and (b) is from the state of (a). Sectional drawing which shows sectional structure of the state which the output shaft of the electric motor rotated 90 degrees, (c) is a top view which shows typically the relationship on the ZA-ZC plane of the drive device and conversion mechanism in the state of (a) (D) is a top view which shows typically the relationship on the ZA-ZC plane of the drive device and conversion mechanism in the state of (c). FIG. 13A is a partial cross-sectional view schematically showing a cross-sectional structure taken along line DE-DE in FIG. 13A when the blade relative position is the neutral position, and FIG. FIG. 13A is a partial cross-sectional view schematically showing a cross-sectional structure along the DE-DE line in FIG. 13A when the position is the maximum pushing position, and FIG. 13C when the blade relative position is the maximum pulling position. The fragmentary sectional view which shows typically the cross-section along a DE-DE line.

The configuration of the electric razor 1 will be described with reference to FIG.
As shown in FIG. 1A, the electric razor 1 includes an apparatus main body 10 held by a user, a blade block 60 for shaving body hair attached to the head portion 50 of the apparatus main body 10, and a blade block 60. And a cap 200 for protection. The blade block 60 has only one outer blade 90.

  As shown in FIG. 1B, the cap 200 has a structure that can be attached to and detached from the apparatus main body 10. Further, the entire head unit 50 is covered in a state of being attached to the apparatus main body 10.

Here, each direction about the apparatus main body 10 is defined as follows. The axial direction ZA corresponds to the “longitudinal direction of the main body”.
(A) A direction orthogonal to the axial direction ZA in the front view is defined as a main body lateral direction ZB.
(B) A direction orthogonal to the axial direction ZA and the main body lateral direction ZB is defined as a main body depth direction ZC.
(C) A direction from the main body 10 in the axial direction ZA toward the head unit 50 is defined as an upper ZA1.
(D) A direction from the head portion 50 in the axial direction ZA toward the apparatus main body 10 is defined as a downward ZA2.
(E) The direction from the front of the main body 10 to the back in the main body depth direction ZC is defined as a rear ZC2.
(F) A direction from the back surface to the front surface of the main body 10 in the main body depth direction ZC is defined as a front ZC1.

With reference to FIG. 2, the structure of the apparatus main body 10 is demonstrated.
As shown in FIG. 2A, the apparatus main body 10 has a stepped portion that comes into contact with the end surface of the cap 200 in FIG. 1 at an intermediate portion in the axial direction ZA. The length of the apparatus body 10 in the axial direction ZA is larger than the length of the head unit 50 in the axial direction ZA.

  As shown in FIG. 2B, the apparatus main body 10 includes a main body case 10 </ b> A having a space for accommodating various components, a secondary battery 17 serving as a power source for the electric razor 1, and an inner blade of the blade block 60. It has the drive device 20 which drives 100 (refer FIG. 5), and the head part 50 for fitting the blade block 60. FIG. In addition to this, the conversion mechanism 30 that converts the rotation of the electric motor 21 of the drive device 20 into a reciprocating linear motion and transmits the reciprocating linear motion to the head unit 50, and the wiring member 40 that electrically connects the secondary battery 17 and the drive device 20. And have. In addition to this, a dust-proof rubber 16 that suppresses the entry of foreign matter into the apparatus main body 10 and a power switch 18 that switches between driving and stopping of the driving device 20 are provided.

  The head unit 50 includes a head case 50A having a space for accommodating various components, a blade block 60 fixed to the front surface of the head case 50A, and a lock button 55 for removing the blade block 60 from the head case 50A. Have. In addition, a relay member 54 that reciprocates linearly with the force transmitted from the conversion mechanism 30 and a head link 53 that transmits the force transmitted from the relay member 54 to the blade block 60 are provided. The relay member 54 and the head link 53 are located inside the head case 50A.

A detailed configuration of the apparatus main body 10 will be described with reference to FIG.
In addition to the drive device 20 and the like, the device main body 10 includes a contact fitting 19 that switches electrical connection and disconnection between the secondary battery 17 and the drive device 20.

  The power switch 18 includes an operation unit 18A that is operated by the user, an attachment portion 18B to which the contact fitting 19 is attached, an operation surface 18C that is located outside the main body case 10A, and a user when the power switch 18 is operated. A click portion 18D for imparting a click feeling. The power switch 18 is located in front of the apparatus main body 10.

  The main body case 10 </ b> A has an upper ring 14 and a lower ring 15 for fixing the first case 11 and the second case 12 to each other in addition to the first case 11, the second case 12, and the third case 13.

  The drive device 20 includes an electric motor 21 having an output shaft 22, a rotation member 23 having the same axis as the output shaft 22, an eccentric shaft 24 having a center line eccentric to the rotation member 23, and rotation of the drive device 20. And a roller 25 that transmits to the conversion mechanism 30. The rotating member 23 is fixed to the output shaft 22. The eccentric shaft 24 is fixed to the rotating member 23. The roller 25 is supported by the eccentric shaft 24 in a state where the roller 25 can rotate with respect to the eccentric shaft 24 and cannot move in the axial direction ZA with respect to the eccentric shaft 24.

  The center line of the eccentric shaft 24 is parallel to the direction of the center line of the output shaft 22. Further, when the operation surface 18C of the power switch 18 is regarded as a virtual plane along the axial direction ZA and the main body lateral direction ZB, it is parallel to the virtual plane.

  The conversion mechanism 30 has three links that convert the rotation of the output shaft 22 into a linear motion in the axial direction ZA, that is, the first link 31, the second link 32, the third link 33, and the rotation center of the first link 31. Support shaft 34.

  The first link 31 includes a rotation shaft 31C that rotates around the support shaft 34, an input portion 31D that supports the roller 25, a first arm 31A that connects the input portion 31D and the rotation shaft 31C, and the rotation shaft 31C. It has the 2nd arm 31B which protrudes in the 2nd link 32 side. The inner peripheral surface of the input portion 31 </ b> D supports the roller 25 while being in contact with the outer peripheral surface of the roller 25.

  The rotating shaft 31C, the input portion 31D, the first arm 31A, and the second arm 31B are formed as an integral part from the same resin material. The first arm 31A and the second arm 31B protrude in different directions in the circumferential direction of the rotation shaft 31C. The rotation shaft 31C is supported by the support shaft 34 in a state where the rotation shaft 31C can rotate with respect to the support shaft 34. The direction of the center line of the support shaft 34 is orthogonal to the direction of the center line of the eccentric shaft 24.

  The second link 32 has a rhombus in plan view in the axial direction ZA and the body depth direction ZC. The input end portion 32A of the second link 32 is connected to the second arm 31B so as to be rotatable with respect to the second arm 31B. The output end 32 </ b> B of the second link 32 is connected to the third link 33 in a state where the rotation with respect to the third link 33 is possible. The third link 33 has a fixing plate 33A for fixing to the head unit 50 of FIG.

  The first case 11 includes a shaft fixing portion 11 </ b> A for fixing the support shaft 34, a shaft guide portion 11 </ b> B that guides the movement of the third link 33, and a support portion 11 </ b> C that supports the third link 33.

  The wiring member 40 includes an anode fitting 41 connected to the anode of the secondary battery 17, a cathode fitting 42 connected to the cathode of the secondary battery 17, and a motor fitting 43 connected to the electric motor 21. In addition, a circuit board 45 that electrically connects corresponding metal fittings and a board metal fitting 44 that is electrically connected to the circuit board 45 are provided. The circuit board 45 has a current fuse 46 that cuts off the electrical connection between the electric motor 21 and the secondary battery 17 when the electric motor 21 is short-circuited. The anode fitting 41, the cathode fitting 42, the motor fitting 43, the circuit board 45, and the board fitting 44 are fixed to the first case 11.

  The anode fitting 41 is electrically connected to the electric motor 21. The cathode fitting 42 is electrically connected to the circuit board 45. The contact fitting 19 of the power switch 18 is connected to the motor fitting 43 and the board fitting 44.

  As described above, the wiring member 40 includes the anode of the secondary battery 17, the anode fitting 41, the electric motor 21, the motor fitting 43, the contact fitting 19, the board fitting 44, the circuit board 45, the cathode fitting 42, and the cathode of the secondary battery 17. An electric circuit through which current flows is formed in this order.

A detailed configuration of the head unit 50 will be described with reference to FIG.
In addition to the head case 50 </ b> A, the head unit 50 includes a relay member 54 connected to the third link 33 of the conversion mechanism 30 of FIG. 3 and a head link 53 connected to the relay member 54. In addition, a blade block insertion hole 50X for inserting the blade block 60 and a lock button 55 for removing the blade block 60 from the head case 50A are provided. The blade block insertion hole 50 </ b> X and the lock button 55 are located in front of the head unit 50. The lock button 55 is positioned below ZA2 of the blade block 60 in the axial direction ZA.

  The head case 50A has two cases, that is, a first case 51 and a second case 52. The first case 51 includes an insertion portion 51A inserted into the first case 11, a link guide portion 51B that guides the movement of the head link 53, and a relay guide portion 51C that guides the movement of the relay member 54. The first case 51 includes a blade block insertion portion 51X, a recess 51Y (see FIG. 1) formed in a portion adjacent to the blade block insertion portion 51X, and a rib 51L for restricting the mounting direction of the blade block 60. And have. The second case 52 has a blade block insertion portion 52X and a recess 52Y formed in a portion adjacent to the blade block insertion portion 52X. The blade block insertion hole 50X is formed by the blade block insertion portion 51X and the blade block insertion portion 52X.

  The insertion portion 51A has a guide groove 51D that guides the movement of the relay member 54 in the axial direction ZA. The relay guide portion 51C has a pair of walls that are opposed to each other through a gap. The link guide portion 51B has a pair of walls that are opposed to each other through a gap. The formation position of the link guide portion 51B is inclined from the front ZC1 to the rear ZC2 in the body depth direction ZC as it goes from the lower ZA2 in the axial direction ZA to the upper ZA1. The second case 52 has a link guide portion (not shown) at a position corresponding to the link guide portion 51B of the first case 51.

  The relay member 54 includes a connection portion 54A connected to the head link 53, a guide portion 54B that guides the tip portion of the third link 33, and a fixed portion to which the fixing plate 33A of the third link 33 in FIG. 3 is fixed. 54C and a pair of protrusions 54D fitted in the respective guide grooves 51D.

  The head link 53 includes a relay connection portion 53A connected to the connection portion 54A of the relay member 54, a blade connection portion 53B connected to the blade block 60, and a pair of protrusions 53C that move in the link guide portion 51B. .

  The relay connection portion 53A is connected to the connection portion 54A so as to be rotatable with respect to the relay member 54. The blade connection portion 53B is connected to the blade block 60 in a state in which the blade connection portion 53B cannot rotate with respect to the blade block 60.

With reference to FIG. 5, the detailed structure of the blade block 60 is demonstrated.
Here, each direction about the blade block 60 is defined as follows. In the plan view of the blade block 60, the vertical direction WA coincides with the axial direction ZA. On the other hand, on the planes of the axial direction ZA and the body depth direction ZC, the vertical direction WA has a predetermined inclination angle with respect to the axial direction ZA.
(A) The moving direction of the inner blade 100 relative to the outer blade 90 is defined as the vertical direction WA.
(B) A direction orthogonal to the vertical direction WA in plan view is defined as a horizontal direction WB.
(C) A direction perpendicular to the vertical direction WA and the horizontal direction WB is defined as a depth direction WC.
(D) A direction from the main body case side to the front end side in the longitudinal direction WA is defined as a pressing method WA1.
(E) A direction from the front end side of the longitudinal direction WA toward the main body case side is defined as a pulling direction WA2.
(F) The direction from the connecting part of the inner blade holding part in the depth direction WC toward the shaving surface is defined as a front face WC1.
(G) A direction from the shaved surface in the depth direction WC toward the connecting portion of the inner blade holding portion is defined as a back side WC2.

  The blade block 60 includes an outer blade 90 that guides body hair to a space inside the outer blade holding portion 70, and an inner blade 100 that reciprocates linearly with respect to the outer blade 90. In addition to this, the outer blade holding part 70 that supports the outer blade 90 from the back side WC 2, the inner blade holding part 80 that supports the inner blade 100 from the back side WC 2, and the inner blade 100 is removed via the inner blade holding part 80. Two springs 61 are pressed against the blade 90.

  The outer blade 90 and the outer blade holding portion 70 are fixed to each other by melting the four outer blade fixing portions 74A and the four hooks 74B formed on the surface of the outer blade holding portion 70. Further, the inner blade 100 and the inner blade holding portion 80 are fixed to each other by melting the four inner blade fixing portions 85 and the two hooks 86 formed on the surface of the inner blade holding portion 80. FIG. 5 shows a state before each outer blade fixing portion 74A, each hook 74B, each inner blade fixing portion 85, and each hook 86 are melted.

  The set of the inner blade 100 and the inner blade holding portion 80 can move in the vertical direction WA with respect to the set of the outer blade 90 and the outer blade holding portion 70. Each end of the spring 61 is fixed to the outer blade holding portion 70 and the inner blade holding portion 80 when the set of the inner blade 100 and the inner blade holding portion 80 moves relative to the outer blade 90 and the outer blade holding portion 70. It is deformed in the vertical direction WA while maintaining the state.

With reference to FIG. 6, the detailed structure of the outer blade 90 is demonstrated.
The outer blade 90 has a top portion 91 extending in the lateral direction WB to form a shaving surface, and two outer blade sidewalls 92 extending from one end portion and the other end portion of the top portion 91 in the lateral direction WB toward the back WC2. And have. Further, the outer blade 90 has a plurality of slits 93 formed from the top portion 91 to each outer blade side wall 92. Each slit 93 has a shape extending in parallel to the lateral direction WB. A blade portion 94 is formed between adjacent slits 93. The slit 93 closest to the pressing direction WA1 and the slit 93 closest to the pulling direction WA2 correspond to “end slits”.

  As shown in FIG. 6 (a), the outer blade side wall 92 has an outer blade holding portion 70 (see FIG. 5) formed at the end on the pressing WA1 side and the end on the pulling WA2 side of the outer blade side wall 92. ) And two foot portions 95 for fixing, and a first positioning portion 98 formed at an intermediate portion in the longitudinal direction WA. Each foot part 95 protrudes most in the back WC2 among the outer blade side walls 92. Each foot portion 95 includes a fixing portion 96 for fitting an outer blade fixing portion 74A (see FIG. 5) of the outer blade holding portion 70, and a hook for hooking a hook 74B (see FIG. 5) of the outer blade holding portion 70. And a hook 97. The outer blade 90 has the same structure as described above also on the outer blade side wall 92 opposite to the outer blade side wall 92 shown in FIG. 6A in the lateral direction WB.

  As shown in FIG. 6B, each blade portion 94 of the top portion 91 includes two blade end portions 94B that form both ends of the blade portion 94 in the lateral direction WB, one of the blade end portions 94B, and the blade. A blade intermediate portion 94A located between the other end portions 94B. In addition, the slit 93 of the top portion 91 includes two slit end portions 93B that form both end portions in the lateral direction WB, and a slit intermediate portion 93A that is positioned between one of the slit end portions 93B and the other of the slit end portions 93B. Have.

  As shown in FIG. 6C, the thickness of the blade portion 94 of the blade intermediate portion 94A is smaller than the thickness of each blade end portion 94B. Further, the outer blade side wall 92 has an arc portion 92A that is continuous with the apex portion 91, and a linear wall portion 92B that is continuous with the arc portion 92A and extends along the depth direction WC. The arc portion 92A is formed over the outer blade side wall 92 and the top portion 91.

  As shown in FIG. 6D, the blade end portion 94B has an inclined portion 94C in which the size of the blade portion 94 in the longitudinal direction WA (hereinafter referred to as “blade width”) gradually decreases as it goes outward in the lateral direction WB. And a straight line portion 94D having the smallest blade width. The entire blade intermediate portion 94A has a linear shape, and the blade width is constant. Further, the blade width of the straight portion 94D is constant.

  The blade width of the blade intermediate portion 94A (hereinafter, “intermediate blade width BA”) is larger than the size of the slit intermediate portion 93A corresponding to the blade intermediate portion 94A in the longitudinal direction WA (hereinafter, “intermediate slit width SA”). . The blade width of the straight portion 94D (hereinafter referred to as “end blade width BD”) is smaller than the size in the longitudinal direction WA of the slit 93 end corresponding to the straight portion 94D (hereinafter referred to as “end slit width SD”). . Further, the end slit width SD is larger than the intermediate slit width SA.

With reference to FIG. 7, the detailed structure of the outer blade holding | maintenance part 70 is demonstrated. FIG. 7 shows a state before each outer blade fixing portion 74A and each hook 74B are melted.
The outer blade holding part 70 includes a frame body 71 into which the outer blade 90 (see FIG. 5) is fitted, and a fixing portion 73 that fixes each spring 61 (see FIG. 5). The frame 71 and the fixed portion 73 are formed as an integral part from the same resin material. The outer blade holding part 70 corresponds to a “molded product”.

  As shown in FIG. 7A, the frame body 71 includes an outer blade insertion hole 71 </ b> A (see FIG. 7B) for fitting the outer blade 90 and both ends of the frame body 71 in the lateral direction WB. Each has a projecting portion 71 </ b> B projecting to the front WC <b> 1 and a guiding portion 72 for guiding hair to each slit 93 at each of both end portions in the lateral direction WB of the frame 71.

  Each protrusion 71B has a flat surface 71C at the end opposite to the outer blade insertion hole 71A in the lateral direction WB. As shown in FIG. 7D, both end portions in the horizontal direction WB excluding the projecting portion 71B of the frame body 71 are inclined so as to go to the back side WC2 as the end face on the front side WC1 side goes outward.

As shown in FIG. 7B, the guide portion 72 includes a plurality of combs 72A protruding in the front direction WC1 at predetermined intervals along the longitudinal direction WA, and a frame body 71 as a base end portion. .
As shown in FIG. 7A, the fixing portion 73 includes two wall portions 74 formed at both ends in the vertical direction WA for fixing the outer blade 90 (see FIG. 5), and each wall portion 74. And two feet 75 for fixing each spring 61 (see FIG. 5).

  Each wall 74 includes two outer blade fixing portions 74A formed in the vicinity of both end portions in the horizontal direction WB and in the vertical direction WA, hooks 74B formed in positions adjacent to the outer blade fixing portions 74A, And a second positioning portion 74 </ b> C formed at the substantially central portion in the longitudinal direction WA in the end surface in the direction WB. The outer blade fixing portion 74A and the hook 74B protrude outward in the lateral direction WB. Further, a gap is formed between the outer blade fixing portion 74A and the hook 74B. In addition, the outer blade holding | maintenance part 70 has the same structure as the above also in the end surface of the wall part 74 on the opposite side to the end surface of the wall part 74 shown to Fig.7 (a) in the horizontal direction WB.

  Each foot 75 has a spring fixing portion 75A that fixes one of the springs 61 (see FIG. 5). Further, as shown in FIG. 7D, the foot portion 75 on the side of the pressing method WA <b> 1 has a groove 75 </ b> B for attaching the blade block 60 to the head portion 50 in a normal direction. Further, as shown in FIG. 7C, the foot 75 on the pulling WA2 side does not have the groove 75B. The groove 75B corresponds to the rib 51L (see FIG. 4) of the head unit 50.

  As shown in FIG. 7B, the outer blade fixing portion 74A on the pressing WA1 side is formed on the pressing WA1 side and the back WC2 side with respect to the spring fixing portion 75A on the pressing WA1 side. Further, the outer blade fixing portion 74A on the pulling WA2 side is formed closer to the pulling WA2 side and the back WC2 side than the spring fixing portion 75A on the pulling WA2 side.

  As shown in FIG. 7C and FIG. 7D, each wall portion 74 has a first discharge hole 76 for discharging the hair inside the outer blade holding portion 70 to the outside of the outer blade holding portion 70. Have Each first discharge hole 76 penetrates the wall portion 74 along the vertical direction WA.

  As shown in FIG. 7B, each foot portion 75 has a second discharge hole 77 for discharging the hair inside the outer blade holding portion 70 to the outside of the outer blade holding portion 70. Each second discharge hole 77 penetrates the foot 75 along the depth direction WC. Further, a spring moving space 78 for moving the spring 61 (see FIG. 5) is formed in a portion corresponding to each outer blade fixing portion 74A (see FIG. 7A). Each spring movement space 78 and each first discharge hole 76 continuously form a hole along one longitudinal direction.

With reference to FIG. 8, the detailed structure of the inner blade 100 is demonstrated.
The inner blade 100 has a top 101 that extends in the lateral direction WB and contacts the outer blade 90 (see FIG. 5), and two inner blade sidewalls 102 that extend from the end of the top 101 in the lateral direction WB to the back WC2. Further, the inner blade 100 has a plurality of slits 103 formed from the top portion 101 to each inner blade side wall 102. Each slit 103 has a shape extending in an inclined manner with respect to the lateral direction WB. A blade portion 104 is formed between adjacent slits 103 and at the end of the pressing method WA1 and the end of the pulling method WA2. In addition, the edge part (refer FIG.8 (c)) of the horizontal direction of the top part 101 is corresponded to an "inner blade edge part."

  As shown in FIG. 8A, each inner blade side wall 102 has two feet 105 for connecting to the inner blade holding portion 80 (see FIG. 5). Each foot part 105 protrudes most in the back WC2 among the inner blade side walls 102. Each foot portion 105 has a fixing portion 106 for fitting the inner blade fixing portion 85 of the inner blade holding portion 80 and a hook hooking portion 107 for hooking the hook 86 of the inner blade holding portion 80. In addition, the inner blade 100 has the same structure as described above also on the inner blade side wall 102 opposite to the inner blade side wall 102 shown in FIG. 8A in the lateral direction WB.

  As shown in FIG. 8B, the size of each slit 103 in the longitudinal direction WA is constant in plan view. Further, the size of the blade portion 104 in the longitudinal direction WA is constant in plan view.

With reference to FIG. 9, the detailed structure of the inner blade holding | maintenance part 80 is demonstrated. FIG. 9 shows a state before each inner blade fixing portion 85 and each hook 86 are melted.
The inner blade holding portion 80 includes a support 81 fitted into the inner blade 100 (see FIG. 5), a connecting portion 82 coupled to the blade connecting portion 53B (see FIG. 4) of the head link 53, and each spring 61 (see FIG. 5), and two foot fixing portions 83 for fixing the inner blade 100 (see FIG. 5). In addition, it has a movement restricting portion 87 that contacts the inside of the outer blade 90 (see FIG. 5). In addition, the inner blade holding | maintenance part 80 is formed as an integral component with the same resin material.

  As shown in FIG. 9B, the connecting portion 82 is formed at a substantially central portion of the inner blade holding portion 80 in the longitudinal direction WA. As shown in FIG. 9C, the connecting portion 82 has a hole for fitting the blade connecting portion 53 </ b> B (see FIG. 4) of the head link 53.

  As shown in FIG. 9A, each foot portion 84 includes an inner blade fixing portion 85 formed on the end surface in the lateral direction WB and a hook 86 formed at a position adjacent to the inner blade fixing portion 85. Have. A gap is formed between the inner blade fixing portion 85 and the hook 86. Further, as shown in FIG. 9B, each inner blade fixing portion 85, each hook 86, and each movement restricting portion 87 protrude outward in the lateral direction WB. Note that the inner blade holding portion 80 has the same structure as described above on the end surface opposite to the end surface shown in FIG. 9A in the lateral direction WB.

  With reference to FIG. 10, the connection structure of the outer blade 90 and the outer blade holding | maintenance part 70 is demonstrated. FIG. 10A shows a state before each outer blade fixing portion 74A and each hook 74B are melted.

  As shown in FIG. 10A, the size of the outer blade 90 in the vertical direction WA is smaller than the size of the outer blade holding portion 70 in the vertical direction WA. The outer blade 90 and the outer blade holding part 70 are fixed in a state where the centers in the respective longitudinal directions WA are matched.

  The outer blade 90 is inserted into the outer blade insertion hole 71 </ b> A of the outer blade holding portion 70 with the second positioning portions 74 </ b> C fitted in the first positioning portions 98. Each outer blade fixing portion 74 </ b> A is inserted into each fixing portion 96. Each hook 74 </ b> B is inserted into each hook catching portion 97. At this time, each blade portion 94 and each comb 72A of the guide portion 72 are arranged at corresponding positions.

  The clearance between each outer blade fixing portion 74A and each fixing portion 96 before melting is larger than the clearance between the first positioning portion 98 and the second positioning portion 74C. Further, the clearance between the hook 74B and the hook hooking portion 97 before melting is larger than the clearance between the first positioning portion 98 and the second positioning portion 74C. Thereby, the outer blade 90 and the outer blade holding | maintenance part 70 are positioned by the 1st positioning part 98 and the 2nd positioning part 74C.

  As shown in FIG. 10B, after setting the state of FIG. 10A, the outer blade fixing portion 74A and the hook 74B are melted. Thereby, the outer blade 90 and the outer blade holding | maintenance part 70 are mutually fixed. Further, the outer blade fixing portion 74A and the hook 74B are continuous.

  With reference to FIG. 11, the connection structure of the inner blade 100 and the inner blade holding | maintenance part 80 is demonstrated. In addition, Fig.11 (a) has shown the state before each inner blade fixing | fixed part 85 and each hook 86 are fuse | melted.

  As shown in FIG. 11A, the size of the inner blade 100 in the vertical direction WA is substantially equal to the size of the inner blade holding portion 80 in the vertical direction WA. The inner blade 100 and the inner blade holding part 80 are fixed in a state where the centers in the respective longitudinal directions WA are matched.

  As shown in FIG. 11A, the inner blade 100 is fitted into the support body 81. Each inner blade fixing portion 85 is inserted into each fixing portion 106. Each hook 86 is inserted into each hook hooking portion 107.

  As shown in FIG. 11 (b), after setting the state of FIG. 11 (a), each inner blade fixing portion 85 and each hook 86 are melted. Thereby, the inner blade 100 and the inner blade holding | maintenance part 80 are mutually fixed. Further, the inner blade fixing portion 85 and the hook 86 are continuous.

With reference to FIG. 12 and FIG. 13, the relationship of each member of the blade block 60 is demonstrated.
The inner blade 100 moves in the vertical direction WA with respect to the outer blade 90 as the electric motor 21 (see FIG. 2) rotates. The position of the inner cutter 100 with respect to the outer cutter 90 (hereinafter referred to as “blade relative position”) is a range from the “maximum pushing position” that is the limit position of the pressing method WA1 to the “maximum pulling position” that is the limit position of the drawing method WA2. It changes with. FIG. 12 and FIG. 13 show the time when the blade relative position is in the “neutral position” which is the neutral position of the maximum pushing position and the maximum pulling position.

  As shown in FIG. 12, the set of the inner blade 100 and the inner blade holding portion 80 is inserted into the outer blade 90 and the outer blade holding portion 70. The spring fixing portion 83 of the inner blade holding portion 80 is inserted into the end portion of the front side WC1 of each spring 61.

  Further, the spring fixing portion 75A of the outer blade holding portion 70 is inserted into the end portion of the back side WC2 of each spring 61. Thereby, the outer blade holding part 70 and the inner blade holding part 80 are connected to each other via the springs 61.

  Each spring 61 is positioned between the outer blade holding portion 70 and the inner blade holding portion 80 in a state of being compressed and deformed. The restoring force of each spring 61 acts in the direction of pushing the inner blade 100 toward the outer blade 90. For this reason, the surface of the inner blade 100 on the front WC1 side is in contact with the surface of the outer blade 90 on the back WC2 side.

  As shown in FIG. 13A, when the blade relative position is the neutral position, all the blade portions 94 of the outer blade 90 overlap at least a part of the blade portion 104 of the inner blade 100 in plan view. Further, from one end portion of the inner blade 100 in the lateral direction WB to the other end portion, that is, the top portion 101 overlaps the blade intermediate portion 94A.

  As shown in FIG. 13 (b), each outer blade side wall 92 and each inner blade side wall 102 face each other through a gap. Further, each movement restricting portion 87 of the inner blade holding portion 80 is in contact with the inner wall surface of the outer blade side wall 92.

  As shown in FIG. 13A, each comb 72 </ b> A of each guide portion 72 corresponds to all the blade portions 94 of the outer blade 90. Further, as shown in FIG. 13 (c), the front end portion of the front WC1 of each comb 72A is on the straight wall portion 92B side from the boundary between each arc portion 92A and each straight wall portion 92B of each outer blade side wall 92. Placed in. That is, the tip portion of the comb 72A is adjacent to the straight wall portion 92B. Moreover, as shown in FIG. 13A, each projecting portion 71B is disposed at a position facing each other across the outer blade 90 in the lateral direction WB.

The relationship between the head unit 50 and the blade block 60 will be described with reference to FIG.
When the blade block 60 is fitted in the blade block insertion hole 50X of the head portion 50, the concave portion 51Y of the first case 51 and the concave portion 52Y of the second case 52 are respectively arranged at positions corresponding to the protruding portions 71B. Thereby, each protrusion part 71B protrudes outside the recessed parts 51Y and 52Y in the horizontal direction WB. Each protrusion 71B and the recesses 51Y and 52Y constitute a finger holding structure for the user to pinch the blade block 60.

With reference to FIG. 15, the relationship of each component of the electric shaver 1 is demonstrated.
(A) The roller 25 is connected to the input portion 31 </ b> D of the first link 31.
(B) The second arm 31 </ b> B of the first link 31 is connected to the second link 32.
(C) The output side end of the second link 32 is connected to the third link 33.
(D) The fixed plate 33 </ b> A of the third link 33 is connected to the relay member 54.
(E) The connecting portion 54 </ b> A of the relay member 54 is connected to the head link 53.
(F) The blade connection portion 53 </ b> B of the head link 53 is connected to the connecting portion 82.
(G) The blade connection portion 53 </ b> B is disposed on the center line C <b> 1 of the apparatus main body 10.
(H) The blade connecting portion 53B is disposed on the rotation center line C2 of the motor 21.
(I) The center line C1 of the apparatus main body 10 and the rotation center line C2 of the motor 21 coincide.

  As shown in FIG. 15 (a), the electric razor 1 has the above-described connection relationship, and thus converts the rotation of the output shaft 22 of the electric motor 21 into a reciprocating linear motion by the conversion mechanism 30. Is transmitted to the blade block 60 via the relay member 54 and the head link 53.

  As shown in FIG. 15 (b), the head link 53 includes a first portion 53X along the axial direction ZA and an end portion of the upper portion ZA1 of the first portion 53X toward the front ZC1 and the front WC1, and blade connection. It has the 2nd part 53Y containing the part 53B and the protrusion 53C, and the 3rd part 53Z which goes to the front ZC1 and the front WC1 from the edge part of ZA2 below the 1st part 53X. Further, the relay member 54 connected to the relay connection portion 53A has a shape along the axial direction ZA.

  The operation of the electric shaver 1 will be described with reference to FIGS. 16 and 17 show a cross-sectional structure of the head unit 50 in which the configuration of the blade block 60 and the configuration of the inner surface of the first case 51 related to the blade block 60 are simplified.

  FIG. 16A shows the operating state of the head unit 50 when the blade relative position is the maximum pressing position. FIG. 16C shows the operating state of the roller 25 and the first link 31 corresponding to this operating state.

  FIG. 17A shows the operating state of the head unit 50 when the blade relative position is the maximum pulling position. FIG. 17C shows the operating state of the roller 25 and the first link 31 corresponding to this operating state.

  FIG. 16B and FIG. 17B show the operating state of the head unit 50 when the blade relative position is the neutral position. Moreover, FIG.16 (d) and FIG.17 (d) have shown the operation state of the roller 25 and the 1st link 31 corresponding to this operation state.

  Detailed operations of the conversion mechanism 30 and the head unit 50 will be described. In the following, regarding the rotation direction R around the predetermined axis in the plane of the axial direction ZA and the body depth direction ZC, the clockwise rotation direction is referred to as “forward rotation direction R1”, and the counterclockwise rotation direction is referred to as “reverse direction R2”. To do.

(1) “Change from the state of FIG. 16A to the state of FIG. 16C”
When the output shaft 22 of the electric motor 21 rotates from the rotational position of FIG. 16B to the rotational position of FIG. 16D, each component of the conversion mechanism 30 and the head unit 50 starts from the state of FIG. The operation is performed up to the state of FIG. The specific operation of each component at this time is shown below.

  The roller 25 rotates together with the output shaft 22. Thereby, it moves to the main body lateral direction ZB with respect to the input portion 31D. For this reason, the input portion 31D receives a force acting in the main body depth direction ZC from the roller 25 and does not receive a force acting in the main body lateral direction ZB from the roller 25.

  For this reason, the state of each component of the conversion mechanism 30 changes from the state of FIG. 16A to the state of FIG. That is, the input portion 31D and the first arm 31A rotate the rotation shaft 31C around the support shaft 34 in the reverse direction R2 in plan view in the axial direction ZA and the main body depth direction ZC. The second arm 31B rotates in the reverse direction R2 around the support shaft 34 with the rotation of the rotation shaft 31C in a plan view of the axial direction ZA and the main body depth direction ZC.

  The input end 32A of the second link 32 is attracted to the lower ZA2 by the second arm 31B while rotating with respect to the second arm 31B as the second arm 31B rotates. For this reason, the 2nd link 32 is pulled near to the rotating shaft 31C side by the 2nd arm 31B as a whole. That is, it moves downward ZA2 with respect to the main body case 10A.

  The third link 33 moves to the lower ZA2 with respect to the main body case 10A as the second link 32 moves to the lower ZA2. That is, it moves in the direction away from the head unit 50 in the axial direction ZA.

  The relay member 54 moves to the lower ZA2 with respect to the head case 50A as the third link 33 moves to the lower ZA2. That is, it moves from the head unit 50 side to the apparatus main body 10 side in the axial direction ZA.

  The head link 53 is pulled toward the apparatus main body 10 by the relay member 54 as the relay member 54 moves downward ZA2. At this time, the protrusion 53C of the head link 53 in FIG. 4 moves in the pulling direction WA2 in the vertical direction WA by contact with the link guide portion 51B. For this reason, the blade connection portion 53B of the head link 53 also moves in the pulling direction WA2.

  The inner blade 100 moves in the pulling direction WA2 with respect to the head case 50A and the outer blade 90 as the blade connecting portion 53B moves in the pulling direction WA2. That is, when the electric motor 21 rotates from the rotational position of FIG. 16 (b) to the rotational position of FIG. 16 (d), the blade relative position changes from the position of FIG. 16 (a) to the position of FIG. 16 (c). .

(2) “Change from the state of FIG. 16C to the state of FIG. 17A”
When the output shaft 22 of the electric motor 21 rotates from the rotational position shown in FIG. 16 (d) to the rotational position shown in FIG. 17 (b), the components of the conversion mechanism 30 and the head unit 50 start from the state shown in FIG. It operates to the state of FIG. Each component at this time operates in the same manner as when operating from the state of FIG. 16A to the state of FIG.

  The inner blade 100 moves in the pulling direction WA2 with respect to the head case 50A and the outer blade 90 as the blade connecting portion 53B moves in the pulling direction WA2. That is, the blade relative position changes from the position shown in FIG. 7C to the maximum pulling position shown in FIG.

(3) “Change from the state of FIG. 17A to the state of FIG. 17C”
When the output shaft 22 of the electric motor 21 rotates from the rotational position shown in FIG. 17B to the rotational position shown in FIG. It operates until the state of FIG. The specific operation of each component at this time is shown below.

  The roller 25 moves with the output shaft 22 in the body lateral direction ZB with respect to the input portion 31D. For this reason, the state of each component of the conversion mechanism 30 changes from the state of FIG. 17A to the state of FIG. That is, the input portion 31D and the first arm 31A rotate the rotation shaft 31C around the support shaft 34 in the normal rotation direction R1 in a plan view in the axial direction ZA and the main body depth direction ZC. The second arm 31B rotates in the normal rotation direction R1 around the support shaft 34 as the rotation shaft 31C rotates in a plan view of the axial direction ZA and the main body depth direction ZC.

  The input end 32A of the second link 32 is pushed out upward ZA1 by the second arm 31B while rotating with respect to the second arm 31B as the second arm 31B rotates. For this reason, the 2nd link 32 is extruded to the head part 50 side by the 2nd arm 31B as a whole. That is, it moves upward ZA1 with respect to the main body case 10A.

  The third link 33 moves to the upper ZA1 with respect to the main body case 10A as the second link 32 moves to the upper ZA1. That is, it moves in a direction approaching the head unit 50 in the axial direction ZA.

  The relay member 54 moves to the upper ZA1 with respect to the head case 50A as the third link 33 moves to the upper ZA1. That is, it moves from the apparatus main body 10 side to the head unit 50 side in the axial direction ZA.

  The head link 53 is pushed toward the head portion 50 by the relay member 54 as the relay member 54 moves to the upper ZA1. At this time, the protrusion 53C of the head link 53 of FIG. 4 moves in the pressing direction WA1 in the vertical direction WA by contact with the link guide portion 51B. For this reason, the blade connection part 53B of the head link 53 also moves in the pressing direction WA1.

  The inner blade 100 moves in the pressing method WA1 with respect to the head case 50A and the outer blade 90 as the blade connecting portion 53B moves in the pressing method WA1. That is, when the electric motor 21 rotates from the rotational position of FIG. 17 (b) to the rotational position of FIG. 17 (d), the blade relative position changes from the position of FIG. 17 (a) to the position of FIG. 17 (c). .

(4) “Change from the state of FIG. 17C to the state of FIG. 16A”
When the output shaft 22 of the electric motor 21 rotates from the rotational position of FIG. 17 (d) to the rotational position of FIG. 16 (b), each component of the conversion mechanism 30 and the head unit 50 starts from the state of FIG. 17 (c). It operates to the state of FIG. Each component at this time operates in the same manner as when operating from the state of FIG. 17A to the state of FIG.

  The inner blade 100 moves in the pressing method WA1 with respect to the head case 50A and the outer blade 90 as the blade connecting portion 53B moves in the pressing method WA1. That is, the blade relative position changes from the position shown in FIG. 17C to the maximum pressed position shown in FIG.

  With reference to FIG. 18, the relationship between the spring 61 and the outer blade holding | maintenance part 70 accompanying the change of a blade relative position is demonstrated. In FIG. 18, the outer blade 90 and the inner blade 100 are omitted from the blade block 60.

Each spring 61 moves inside each spring moving space 78 of the outer blade holding part 70 with a change in the blade relative position.
When the blade relative position is at the maximum pressing position, the end portion on the front side WC1 side of the spring 61 on the pressing method WA1, that is, the spring fixing portion 83 of the inner blade holding portion 80, is the outer blade fixing portion 74A on the pressing method WA1 side. It is located on the side of the pressing WA1. At this time, an intermediate portion of the spring 61 on the pressing method WA1 side in the front view overlaps with the outer blade fixing portion 74A on the pressing method WA1 side. Further, the end portion of the front side WC1 of the spring 61 on the pulling side WA2 exits from the spring moving space 78. At this time, the lower end portion on the back side WC2 side of the foot portion 84 on the pressing method WA1 side of the inner blade holding portion 80 enters the spring moving space 78. Further, the end portion of the support body 81 of the inner blade holding portion 80 on the side of the pressing method WA1 contacts the frame body 71.

  When the blade relative position is at the maximum pulling position, the end portion on the front WC1 side of the spring 61 on the pulling WA2 side, that is, the spring fixing portion 83 of the inner blade holding portion 80, is the outer blade fixing portion 74A on the pulling WA2 side. It is located closer to the pulling direction WA2. At this time, the intermediate portion of the spring 61 on the pulling direction WA2 side in the front view overlaps with the outer blade fixing part 74A on the pulling WA2 side. Further, the end portion of the front side WC1 of the spring 61 on the side of the pressing WA1 exits from the spring moving space 78. At this time, the lower end portion on the back WC2 side of the foot portion 84 on the pulling WA2 side of the inner blade holding portion 80 enters the spring moving space 78. In addition, the end portion of the inner blade holding portion 80 on the side of the drawing direction WA2 of the support body 81 abuts the frame body 71.

With reference to FIG. 14, the removal procedure of the blade block 60 by a user is demonstrated.
(X1) Push down the lock button 55 downward ZA2.
(X2) Place the belly of the thumb against the flat surface 71C of one protrusion 71B.
(X3) The index finger is placed on the flat surface 71C of the other protrusion 71B.
(X4) The blade block 60 is picked up to the front WC1.

A procedure for attaching the blade block 60 by the user will be described. In the following, the relationship between the end of the head portion 50 on the lower ZA2 side and the end of the blade block 60 having the protruding portion 71B is referred to as “regular direction”.
(Y1) The blade block 60 is arranged in a normal direction.
(Y2) Insert the blade block 60 into the insertion hole 50X.
(Y3) Push the lock button 55 upward ZA1.

(Effect of embodiment)
The electric shaver 1 of the present invention has the following effects.
(1) Generally, the slit blade has a small strength because the slit is formed over the entire lateral direction WB at the top. For this reason, when it has a slit blade as an outer blade, it is preferred to enlarge the intensity of an outer blade.

  The electric razor 1 has a slit blade as the outer blade 90. The outer blade 90 has an intermediate slit width SA smaller than the intermediate blade width BA. According to this configuration, the strength of the outer blade 90 is increased compared to a configuration in which the intermediate slit width SA is larger than the intermediate blade width BA. For this reason, the slit blade as the outer blade 90 is not easily deformed.

(2) The intermediate blade width BA of the blade intermediate portion 94A of the outer blade 90 has a linear shape. According to this configuration, the strength of the outer blade 90 is higher than the configuration in which the blade intermediate portion 94A is curved.
(3) In the electric razor 1, the longitudinal direction WA and the axial direction ZA coincide. According to this configuration, the size of the electric shaver 1 in the main body lateral direction ZB can be reduced. For this reason, the portability and convenience of the electric shaver 1 are improved.

  (4) The end slit width SD of the electric razor 1 is larger than the intermediate slit width SA. According to this configuration, since the slit width of the slit end portion 93 </ b> B that is a portion for introducing the hair into the outer blade 90 is large, the hair can be efficiently guided into the outer blade 90.

  (5) The end slit width SD of the electric razor 1 is larger than the end blade width BD. According to this configuration, the hair can be efficiently guided into the outer blade 90 as compared with the configuration in which the end slit width SD is smaller than the end blade width BD.

  (6) As for the inner blade 100 of the electric shaver 1, the whole top part 101 is arrange | positioned corresponding to the blade intermediate part 94A. According to this configuration, since the blade intermediate portion 94A is supported by the inner blade 100, the outer blade 90 is not easily deformed.

  (7) The thickness of the blade middle portion 94A is smaller than the thickness of the blade end portion 94B. According to this configuration, the inner blade 100 is positioned closer to the hair root in the blade intermediate portion 94A. For this reason, hair can be deeply cut.

  (8) All the blade portions 94 of the electric razor 1 overlap the blade portions 104 of the inner blade 100 in the neutral position. According to this structure, since the blade part 94 of all the outer blades 90 is supported by the inner blade 100, the outer blade 90 becomes difficult to deform | transform.

  (9) The blade portion 94 of the electric razor 1 has an inclined portion 94C and a straight portion 94D. The blade width of the inclined portion 94C gradually decreases toward the outside in the lateral direction WB. The blade width of the straight line portion 94D has a certain size in the lateral direction WB. According to this structure, compared with the structure where the blade width of the blade part 94 becomes small in steps, the blade part 94 is not easily caught on the skin.

  (10) The electric razor 1 has a protruding portion 71B that applies a finger to a portion adjacent to the outer blade 90 in the lateral direction WB. According to this configuration, when the blade block 60 is removed from the main body by applying a finger to the protrusion 71B, the finger 71 may contact the outer blade 90 because the protrusion 71B is not on the extension of the vertical direction WA of the outer blade 90. Can be reduced by the user. That is, the user can safely remove the blade block 60 from the main body.

(11) The electric razor 1 has a flat surface portion 71C at the end of the protruding portion 71B opposite to the outer blade 90. According to this configuration, the user can easily pinch the protruding portion 71B stably.
(12) The electric razor 1 has a recessed part in the part of the main body corresponding to the protrusion 71B. According to this structure, the protrusion amount of the protrusion part 71B becomes relatively large. That is, it becomes easy for the user to place a finger on the protruding portion 71B. Moreover, compared with the case where the protrusion amount of the protrusion part 71B is enlarged, it can suppress that the protrusion part 71B obstructs when it shaves by contacting skin.

  (13) The electric razor 1 has two protrusions 71B that face each other with the outer blade 90 interposed therebetween. According to this configuration, the user can easily remove the blade block 60 by gripping each protrusion 71B.

  (14) The protruding portion 71B is formed in a portion adjacent to the end portion of the outer blade 90 on the third case 13 side. According to this configuration, as compared with the case where the protruding portion 71B is formed in a portion adjacent to the end portion on the side of the pressing method WA1, it is prevented that the protruding portion 71B interferes with shaving hair by hitting the skin. can do.

  (15) The electric razor 1 has ribs 51 </ b> L and grooves 75 </ b> B as a restricting structure that allows the blade block 60 to be attached to the head unit 50 only in the normal direction. According to this configuration, when the blade block 60 is assembled to the head unit 50, the protruding portion 71B is not disposed at the end portion on the side of the pressing method WA1. For this reason, it can suppress that it becomes an obstacle when shaving hair by projecting part 71B hitting skin. Moreover, since the rib 51L and the groove 75B are provided as the restricting structure, the blade block 60 is unlikely to come off the head portion 50. Moreover, it is easy to confirm whether the blade block 60 is firmly attached to the head unit 50.

  (16) The outer cutter 90 is fitted into the frame 71 of the outer cutter holder 70 on the entire circumference in plan view. According to this configuration, the entire circumference of the outer blade 90 is held by the outer blade holding portion 70, so that the strength of the blade block 60 can be improved. Moreover, since the exposed surface of the outer blade 90 of the blade block 60 removed from the main body 10 is reduced, the user can handle the blade block 60 with peace of mind.

  (17) The bristles introduced and cut into the outer blade 90 and the outer blade holding portion 70 are moved toward the end portion of the outer blade holding portion 70 in the longitudinal direction WA along with the reciprocating linear motion. The electric razor 1 has a first discharge hole 76 that penetrates the outer blade holding portion 70 in the vertical direction WA in each wall portion 74 of the outer blade holding portion 70. According to this structure, since the hair brought close to the both ends of the vertical direction WA of the outer blade holding part 70 can be efficiently discharged to the outside of the outer blade holding part 70 by the communication hole, the hair discharging efficiency is improved.

  (18) In the electric razor 1, the outer blade side wall 92 and the inner blade side wall 102 face each other through a gap. According to this configuration, the hair introduced into the outer blade 90 can be moved to the gap between the outer blade side wall 92 and the inner blade side wall 102. For this reason, it can suppress that the hair collected between the outer blade 90 and the inner blade 100 prevents reciprocating linear motion.

  (19) The inner blade holding portion 80 has a movement restricting portion 87 that contacts the outer blade side wall 92. According to this configuration, the inner blade 100 can be prevented from moving in the lateral direction WB with respect to the outer blade 90. Further, since the contact area of the movement restricting portion 87 with the outer blade side wall 92 is small, the contact resistance when the inner blade 100 moves in the longitudinal direction WA with respect to the outer blade 90 can be reduced.

  (20) Each wall 74 comes into contact with the outer blade 90 and two outer blade fixing portions 74A for fixing the outer blade 90, and a spring moving space 78 into which the spring 61 enters as the inner blade 100 reciprocates linearly. Have The spring moving space 78 of the wall portion 74 on the side of the pressing method WA1 has such a size that the spring 61 on the pressing method WA1 side can enter the portion on the pressing method WA1 side of the outer blade fixing portion 74A in the longitudinal direction WA. Have. The spring moving space 78 of the wall portion 74 on the pulling WA2 side has such a size that the spring 61 on the pulling WA2 side can enter the portion on the pulling WA2 side of the outer blade fixing portion 74A in the vertical direction WA. Have. According to this configuration, the size of the outer blade holding portion 70 in the longitudinal direction WA can be reduced.

  (21) The outer blade holding portion 70 has hooks 74B that are hooked on the hook hooking portions 97 of the outer blade 90 at portions adjacent to the outer blade fixing portions 74A. According to this configuration, the connection between the outer cutter 90 and the outer cutter holder 70 is strengthened. Further, since each hook 74B is formed in a portion adjacent to the outer blade fixing portion 74A, the space for forming the hook 74B is larger than when the hook 74B is formed in a portion away from the outer blade fixing portion 74A. Can be small. Thereby, the magnitude | size of the outer blade holding | maintenance part 70 and the outer blade 90 can be made small.

  (22) The lower end portion of the foot portion 84 of the inner blade holding portion is formed closer to the front side WC1 than the spring fixing portion 83 of the outer blade holding portion 70. According to this configuration, the inner blade holding portion 80 can be positioned inside the spring moving space 78. Thereby, the magnitude | size of the depth direction WC of the blade block 60 can be made small.

  (23) The electric razor has a plurality of combs 72A along the vertical direction WA at both ends of the outer blade 90 in the horizontal direction WB. According to this configuration, each comb 72 </ b> A guides the hair to each slit 93, so that the hair can be efficiently guided to the slit 93.

  (24) The guiding portion 72 has combs 72A at both ends in the lateral direction WB in all of the plurality of blade portions 94. According to this configuration, the electric razor 1 can efficiently guide hair to all the slits 93.

  (25) The tip portion of the comb 72A is located at a position adjacent to the arc portion 92A and the straight wall portion 92B in the depth direction WC. According to this configuration, since the protruding amount of the comb 72A is small, the amount of the tip portion of the comb 72A biting into the skin can be reduced. Thereby, the uncomfortable feeling which a user feels by the contact of the comb 72A can be reduced.

  (26) In the depth direction WC, the amount of protrusion of the guiding portion 72 from the outer blade 90 increases toward the back side WC2. According to this configuration, when moving the outer blade 90 in the lateral direction WB with respect to the skin, the skin contacts the comb 72A and the outer blade 90 after contacting the frame 71, so that the user feels uncomfortable.

(27) The guiding portion 72 is formed as a part of the frame 71. According to this configuration, the strength of the outer blade holding portion 70 can be improved as compared with the case where the guide portion 72 and the frame body 71 are separated.
(28) The outer blade 90 and the outer blade holding portion 70 have a first positioning portion 98 and a second positioning portion 74C that define the mutual positional relationship. The second positioning portion 74 </ b> C is located in the center of the outer blade holding portion 70 and the guiding portion 72 in the vertical direction WA. According to this configuration, the guide portion 72 is positioned with respect to the outer blade 90 at the center of the guide portion 72 in the longitudinal direction WA. Thereby, compared with the case where it positions with respect to the outer blade 90 in the edge part WA of the vertical direction WA of the induction | guidance | derivation part 72, the comb 72A of the induction | guidance | derivation part 72 and the blade part 94 of the outer blade 90 do not shift | deviate.

  (29) According to the configuration in which the blade connecting portion 53B of the head link 53 is connected to the end portion of the drawing method WA2 in the longitudinal direction WA of the inner blade 100, the inner blade 100 is likely to be biased to the drawing method WA2. Exercise and sharpness become unstable. Further, according to the configuration in which the blade connecting portion 53B of the head link 53 is connected to the end portion of the pressing method WA1 in the longitudinal direction WA of the inner blade 100, the inner blade 100 is easily pressed against the outer blade 90 excessively. The reciprocating linear motion becomes unstable. The electric razor 1 connects the blade connecting portion 53B of the head link 53 and the central connecting portion 82 in the longitudinal direction WA of the inner blade 100. According to this configuration, the driving of the inner blade 100 is more stable than the configuration in which the blade connecting portion 53B and the end portion in the longitudinal direction WA of the inner blade 100 are connected. Moreover, since it can suppress that the inner blade 100 is biased to the drawing method WA2, the sharpness is stabilized. Thereby, the reciprocating linear motion of the inner blade 100 can be stabilized.

  (30) The electric razor 1 has a first transmission portion including a first portion 53X having a shape extending in the axial direction ZA, and a second portion 53Y as a second transmission portion having a shape extending in the depth direction WC. The relay member 54 that is the input end of the first transmission unit is connected to the electric motor 21 via the conversion mechanism 30. Further, the blade connecting portion 53B which is the output side end portion of the second portion 53Y is connected to the connecting portion 82. According to this structure, since the 2nd transmission part connects with the connection part 82 from the depth direction WC orthogonal to the vertical direction WA, ie, a connection direction, and a substantially orthogonal direction, connection of the blade connection part 53B and the connection part 82 is carried out. Is hard to come off.

  (31) The spring 61 has each spring 61 at a position facing the second portion 53Y. According to this configuration, even when the blade relative position is at the maximum pressing position and the maximum pulling position, the pressing force of the inner blade 100 by each spring 61 is stabilized.

(32) The connecting portion 82 is located on the center line C1 of the apparatus main body 10. According to this structure, the magnitude | size of the main body horizontal direction ZB of the electric shaver 1 can be made small.
(33) The connecting portion 82 is located on the rotation center line C <b> 2 of the electric motor 21. According to this configuration, since the distance between the electric motor 21 and the inner blade 100 can be reduced, driving efficiency can be improved.

  (34) The blade block 60 can be removed from the head unit 50. According to this configuration, the blade block 60 and the head unit 50 can be cleaned with the blade block 60 removed from the head unit 50.

  (35) The inner blade holding portion 80 has a hook 86 at a portion adjacent to the inner blade fixing portion 85. The inner blade 100 has a hook hooking portion 107 that hooks on the hook 86 at a portion corresponding to the hook 86. According to this configuration, the inner blade 100 and the inner blade holding portion 80 are firmly fixed. In addition, since the hook 86 is formed in a portion adjacent to the inner blade fixing portion 85, the space for forming the hook 86 is smaller than when the hook 86 is formed in a portion away from the inner blade fixing portion 85. can do. Thereby, the magnitude | size of the inner blade holding | maintenance part 80 and the inner blade 100 can be made small.

(Other embodiments)
The present invention includes embodiments other than the above-described embodiment. Hereinafter, the modification of the said embodiment as other embodiment of this invention is shown. The following modifications can be combined with each other.

-The outer blade 90 of the said embodiment (FIG. 6) has the slit 93 extended along the horizontal direction WB. On the other hand, the modified outer blade 90 has a slit extending obliquely with respect to the lateral direction WB.
-As for the outer blade 90 of the said embodiment (FIG. 6), the whole blade intermediate part 94A has a linear shape. On the other hand, in the modified outer blade 90, a part of the blade middle portion 94A has a linear shape.

  In the outer blade 90 of the above embodiment (FIG. 6), the thickness of the blade middle portion 94A is smaller than the thickness of the blade end portion 94B. On the other hand, in the modified outer blade 90, the thickness of the blade intermediate portion 94A is greater than or equal to the thickness of the blade end portion 94B.

  In the outer blade 90 of the above embodiment (FIG. 6), the end blade width BD is smaller than the end slit width SD. On the other hand, the outer blade 90 of the modified example has an end blade width BD larger than or equal to the end slit width SD.

-The blade edge part 94B of the said embodiment (FIG. 6) has the inclination part 94C and the linear part 94D. On the other hand, in the modified blade edge portion 94B, one of the inclined portion 94C and the straight portion 94D is omitted.
-The blade edge part 94B of the said embodiment (FIG. 6) has the inclination part 94C which inclines linearly. On the other hand, the blade edge portion 94B of the modified example has a curved inclined portion.

  -The blade block 60 of the said embodiment (FIG. 4) has the groove | channel 75B as a control structure, and the head part 50 has the rib 51L as a control structure. On the other hand, the blade block 60 of the modified example has a rib as a restricting structure, and the head unit 50 has a groove as a restricting structure.

  -The blade block 60 and the head part 50 of the said embodiment (FIG. 4) have the groove | channel 75B and the rib 51L as a control structure for attaching the blade block 60 in a regular direction. On the other hand, the modified blade block 60 and the head unit 50 omit the restriction structure. In this case, the blade block 60 can be attached to the head unit 50 in a state rotated by 180 degrees with respect to the normal direction.

  -The frame 71 of the said embodiment (FIG. 13) covers the perimeter of the outer blade 90 in planar view of the blade block 60. FIG. On the other hand, the frame of the modification covers only a part of the outer blade 90 in a plan view of the blade block 60.

-The outer blade holding | maintenance part 70 of the said embodiment (FIG. 13) is integrally formed as a molded article. On the other hand, in the outer blade holding part 70 of the modified example, the frame body and the fixed part are formed separately.
-The inner blade 100 of the said embodiment (FIG. 8) has the slit 103 which inclines and extends with respect to the horizontal direction WB. On the other hand, the modified inner blade 100 has a slit extending parallel to the lateral direction WB.

  In the inner blade 100 of the above embodiment (FIG. 13), the entire top portion 101 overlaps the blade intermediate portion 94A of the outer blade 90. On the other hand, in the modified inner blade 100, a part of the top part 101 overlaps the blade intermediate part 94A of the outer blade 90, and a part overlaps the blade end part 94B.

  In the inner blade 100 of the above embodiment (FIG. 13), at least a part of the blade portion 104 of the inner blade 100 overlaps all the blade portions 94 of the outer blade 90 when the blade relative position is the neutral position. On the other hand, in the modified inner blade 100, at least a part of the blade portion of the inner blade 100 overlaps with a portion of the blade portion 94 of the outer blade 90 when the blade relative position is the neutral position.

  -The outer blade holding | maintenance part 70 of the said embodiment (FIG. 7) has the hook 74B in the part adjacent to the four outer blade fixing | fixed parts 74A, respectively. On the other hand, in the modified outer blade holding part 70, at least one of the four hooks 74B is omitted.

-The outer blade holding | maintenance part 70 of the said embodiment (FIG. 7) has the guidance | induction part 72. FIG. On the other hand, the outer blade holding part 70 of the modified example omits the guide part 72.
-The guidance part 72 of the said embodiment (FIG. 7) is integrally formed with the outer blade holding | maintenance part 70. FIG. On the other hand, the guide part of the modification is formed separately from the outer blade holding part 70.

-Comb 72A of guidance part 72 of the above-mentioned embodiment (Drawing 7) respond | corresponds to all the blade parts 94 of the outer blade 90. FIG. On the other hand, the guide part of the modification corresponds to a part of the plurality of blade parts 94.
-The outer blade holding | maintenance part 70 of the said embodiment (FIG. 7) has the 2nd positioning part 74C in the center of the vertical direction WA of the outer blade holding | maintenance part 70. FIG. On the other hand, the outer blade holding part 70 of the modified example has a positioning part at the end of the outer blade holding part 70 in the longitudinal direction WA. In this case, the first positioning part 98 of the outer blade 90 is changed to a position corresponding to the positioning part of the outer blade holding part 70.

  -The outer blade holding | maintenance part 70 of the said embodiment (FIG. 7) has the 2nd positioning part 74C in the center of the vertical direction WA of the outer blade holding | maintenance part 70. FIG. On the other hand, the outer cutter holder 70 of the modified example is positioned between the end WA1 side and the center of the outer cutter holder 70 in the longitudinal direction WA, or between the end WA2 side and the center. Part. In this case, the first positioning part 98 of the outer blade 90 is changed to a position corresponding to the positioning part of the outer blade holding part 70.

-The outer blade holding | maintenance part 70 of the said embodiment (FIG. 7) has the two protrusion parts 71B. On the other hand, the outer blade holding part 70 of the modified example omits one of the two protrusions 71B.
-The outer blade holding | maintenance part 70 of the said embodiment (FIG. 14) has each protrusion part 71B and recessed part 51Y, 52Y as a finger hold structure. On the other hand, the outer blade holding part 70 of the modified example has only the recesses 51Y and 52Y as a finger holding structure.

  -Each protrusion part 71B and recessed part 51Y, 52Y of the said embodiment (FIG. 14) is formed in the edge part by the side of drawing WA2 of the outer blade 90. As shown in FIG. On the other hand, each protrusion 71B and the recesses 51Y and 52Y of the modified example are formed at the end of the outer blade 90 on the pressing method WA1 side.

  -Each protrusion part 71B and recessed part 51Y, 52Y of the said embodiment (FIG. 14) are formed in the part adjacent to the outer blade 90 in the horizontal direction WB. On the other hand, each of the protrusions 71B and the recesses 51Y and 52Y of the modification are formed in a portion adjacent to the outer blade 90 in the longitudinal direction WA.

  -The inner blade holding | maintenance part 80 of the said embodiment (FIG. 9) has the hook 86 in the part adjacent to the two inner blade fixing | fixed parts 85, respectively. On the other hand, in the modified inner blade holding part 80, at least one of the two hooks 86 is omitted.

  -The inner blade holding | maintenance part 80 of the said embodiment (FIG. 9) has the hook 86 in the part adjacent to the two inner blade fixing | fixed parts 85, respectively. On the other hand, the modified inner blade holding portion 80 has hooks 86 at portions adjacent to the four inner blade fixing portions 85.

-The inner blade holding | maintenance part 80 of the said embodiment (FIG. 9) has the connection part 82 in the center of the vertical direction WA. On the other hand, the modified inner blade holding portion 80 has a connecting portion at the end in the longitudinal direction WA.
-The inner blade holding | maintenance part 80 of the said embodiment (FIG. 9) has the connection part 82 in the center of the vertical direction WA. On the other hand, the inner blade holding portion 80 of the modified example is connected between the end portion of the outer blade holding portion 70 on the pressing direction WA1 side in the longitudinal direction WA and the center, or between the end portion on the pulling WA2 side and the center. Part.

  In the above embodiment (FIG. 15), the connecting portion 82 is located on the center line C1 of the apparatus main body 10 and the rotation center line C2 of the electric motor 21. On the other hand, the connecting portion 82 of the modification is located at a predetermined distance from at least one of the center line C1 of the apparatus main body 10 and the rotation center line C2 of the electric motor 21. When the connecting portion 82 is located at a predetermined distance from only one of the center line C1 of the apparatus body 10 and the rotation center line C2 of the electric motor 21, the center line C1 of the apparatus body 10 and the electric motor 21 are located. The rotation center lines C2 do not coincide.

-The blade block 60 of the said embodiment (FIG. 5) has the two springs 61. FIG. On the other hand, the blade block 60 of the modified example has one, or three or more springs.
-The blade block 60 of the said embodiment (FIG. 15) has the head link 53 and the relay member 54. FIG. On the other hand, the relay member 54 is omitted from the modified blade block 60. Further, the head link 53 is connected to the third link 33 in a state where the rotation with respect to the third link 33 is possible.

  -The electric shaver 1 of the said embodiment (FIG. 15) has the structure which can attach the head part 50 to the apparatus main body 10, and can remove the head part 50 from the apparatus main body 10. FIG. On the other hand, in the electric razor 1 of the modified example, the head unit 50 is integrated with the apparatus main body 10.

-The electric shaver 1 of the said embodiment (FIG. 1) has only one slit blade as the outer blade 90. FIG. On the other hand, the modified electric razor 1 has a plurality of slit blades as the outer blade 90.
-The electric shaver 1 of the said embodiment (FIG. 1) has only a slit blade as the outer blade 90. FIG. On the other hand, the electric shaver 1 of the modified example has at least one of a slit blade and a net blade as the outer blade 90.

  In the above embodiment (FIG. 14), the longitudinal direction WA of the outer blade 90 coincides with the axial direction ZA of the apparatus body 10 in the front view of the blade block 60. On the other hand, the longitudinal direction WA of the outer blade 90 of the modification is orthogonal to the axial direction ZA of the apparatus main body 10 in the front view of the blade block 60.

  DESCRIPTION OF SYMBOLS 1 ... Electric razor, 10 ... Apparatus main body (main body), 90 ... Outer blade, 93 ... Slit, 93A ... Slit middle part, 93B ... Slit edge part, 94 ... Blade part, 94A ... Blade middle part, 94B ... Blade edge part , 94C ... inclined portion, 94D ... straight line portion, 100 ... inner blade.

Claims (8)

In an electric razor having an inner blade and an outer blade relatively reciprocating linearly moving,
As the outer blade, having a slit blade having a plurality of slits and a plurality of blade portions,
The direction of the reciprocating linear motion is the longitudinal direction, the size of the blade portion in the longitudinal direction is the blade width, the size of the slit in the longitudinal direction is the slit width, and the longitudinal direction in the plan view of the outer blade The direction orthogonal to the horizontal direction,
The slit width is smaller than the blade width,
The blade portion has two blade end portions that are both end portions in the lateral direction, and a blade intermediate portion located between one of the blade end portions and the other of the blade end portions,
This blade intermediate part has a linear shape, The electric shaver characterized by the above-mentioned. The electric razor according to claim 1,
The slit has two slit end portions which are both ends in the lateral direction, and a slit intermediate portion located between one of the slit end portions and the other of the slit end portions,
The electric shaver, wherein the slit width of the slit end portion is larger than the slit width of the slit intermediate portion. The electric shaver according to claim 2,
The electric shaver, wherein the slit width of the slit end portion is larger than the blade width of the blade end portion. In the electric shaver according to any one of claims 1 to 3,
The inner blade has two inner blade end portions which are both end portions in the lateral direction,
The blade intermediate portion overlaps with a portion from one of the inner blade end portions to the other of the inner blade end portions in the lateral direction. In the electric shaver according to any one of claims 1 to 4,
The thickness of the said blade intermediate part is smaller than the thickness of the said blade edge part. The electric shaver characterized by the above-mentioned. In the electric shaver according to any one of claims 1 to 5,
The inner blade moves in a range from a maximum pushing position to a maximum pulling position via a neutral position with respect to the outer blade,
The maximum pressing position indicates a position when the inner blade moves to a position closest to the outer blade in the vertical direction,
The maximum pulling position indicates a position when the inner blade moves to a position closest to the outer blade in the longitudinal direction,
The neutral position indicates a neutral position between the maximum pushing position and the maximum pulling position,
Of the plurality of slits, each of the blade portions positioned between one of the end slits and the other of the end slits is defined as the slits positioned at the longitudinal ends. The electric shaver overlaps with the blade portion of the inner blade in a plan view. An electric razor according to any one of claims 2 to 4, or at least an electric razor according to claim 5 quoting claim 2, or an electric razor according to claim 6 quoting at least claim 2. ,
The blade edge portion has an inclined portion and a linear portion that are sequentially located from the center side toward the outside in the lateral direction,
The blade width of the inclined portion gradually decreases toward the outside in the lateral direction,
The blade width of the straight portion has a certain size in the lateral direction. In the electric shaver according to any one of claims 1 to 7,
The electric razor has a main body that supports the outer blade and the inner blade,
The electric shaver according to claim 1, wherein a longitudinal direction of the main body coincides with the longitudinal direction in a plan view of the outer cutter.

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