JP4848110B2 - Swing razor - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a swing-type razor that supports a razor head so that the holder can swing.
[0002]
[Prior art]
Conventionally, in the safety razor according to Japanese Patent Laid-Open No. 11-300064, as shown in the drawing of the same publication, other than the pusher 14 urged by a compression coil spring so as to press the replaceable blade cartridge 2 with its swing. The lock portion 10 is provided to prevent the replacement blade cartridge 2 from swinging.
[0003]
[Problems to be solved by the invention]
In the conventional safety razor, the lock for the replaceable blade cartridge 2 cannot be reliably locked only by the lock portion 10, and the replaceable blade cartridge 2 is in a swing lock state in which the swing operation of the replaceable blade cartridge 2 is not used. Cannot be reliably prevented. Therefore, there is a problem in the stability of the replaceable blade cartridge 2, and there is a possibility that the shaving taste may be adversely affected.
[0004]
Further, since the pressure prefix portion of the pusher 14 is formed in a bifurcated shape by both arms, the swing of the replaceable blade cartridge 2 in the direction orthogonal to the swinging direction (the extending direction of the blade tip of the replaceable blade cartridge 2). Can be prevented. However, the shape of the replaceable blade cartridge 2 in the neutral state (a free state in which the shaving force is not applied to the replaceable blade cartridge 2) can be prevented, in particular, at the beginning of the shaving, with the shape alone. The swinging of the replaceable blade cartridge 2 cannot be reliably prevented in a swingable state using the swinging operation of the replaceable blade cartridge 2. Therefore, there is a problem in the stability of the replaceable blade cartridge 2, and there is a possibility that the shaving taste may be adversely affected.
[0005]
The present invention aims to improve the stability of the razor head (corresponding to the replaceable blade cartridge 2), improve the stability, and improve the shaving taste. Yes.
[0006]
[Means for Solving the Problems and Effects of the Invention]
With the aid of code below the embodiment of the drawings (FIGS. 1-4) that describes the present invention.
[0015]
* Invention of Claim 1 A swing-type razor according to the present invention is configured as follows.
This swinging razor includes a razor head (1) and a holder (2) that supports the razor head (1) so that the head can swing. A pusher (6) having a pressure prefix portion (23) for urging the pressure receiving portion (11) formed on the razor head (1) so as to come into pressure contact with the head swinging is provided. The pressure prefix portion (23) of the pusher (6) sandwiches both sides of the pressure receiving portion (11) of the razor head (1) in a direction (left-right direction Y) orthogonal to the swinging direction of the razor head (1). While providing the arm part (26), the pressure-contact part (27) which press-contacts the pressure-receiving surface (11a) of the pressure-receiving part (11) of the razor head (1) between these both arm parts (26) is provided. In the swinging direction of the razor head (1), the height dimension (H27) of the press contact part (27) is made larger than the height dimension (H26) of the both arm parts (26).
[0016]
In the present invention, the arms (26) of the pressure prefix (23) of the pusher (6) can prevent the razor head (1) from swinging in the direction (left-right direction Y) perpendicular to the swinging direction. Not only can the height (H27) of the pressure contact portion (27) be increased by the pressure prefix portion (23) of the pusher (6), so that the razor head (1) is in a neutral state (shaving force on the razor head 1). In a free state in which no shaving is given, it is possible to prevent the razor head (1) from swinging in the swing direction, particularly at the beginning of shaving. Therefore, the razor head (1) can be supported with stability with respect to the holder (2) and swung. Therefore, in a state where the head can be swung using the head swinging motion of the razor head (1), the swing of the razor head (1) can be surely prevented, the stability can be improved, and the shaving taste can be improved.
[0017]
* Invention of Claim 2 The present invention is configured as follows based on the invention of Claim 1 .
The pusher (6) can take a restricted state (B) for preventing the razor head (1) from swinging and an allowed released state (A). In the present invention, the pusher (6) can prevent the razor head (1) from swinging. Therefore, the swinging lock with respect to the razor head (1) can be reliably performed. Therefore, in addition to the swingable state using the swing motion of the razor head (1), the swing of the razor head (1) is surely prevented even in the swing lock state where the swing motion of the razor head (1) is not used. Thus, the stability can be improved and the shaving taste can be improved.
[0018]
* Invention of Claim 3 The present invention is configured as follows based on the invention of Claim 2 .
In the operating means for setting the pusher (6) to the restricted state (B) and the released state (A), the operation knob (34) having the finger contact part (35) is moved to the restricted position (Q) and the released position (P Between the operation knob (34) and the pusher (6), the control position (Q) of the operation knob (34) is set at the control position (Q), and the operation knob ( The interlocking body (7) which takes the release position (P) at the release position (P) of 34) is provided. This interlocking body (7) abuts against the pusher (6) so as to restrict the pusher (6) at the restricting position (Q) and releases the restriction of the pusher (6) at the releasing position (P). 6) There is a restricting portion (regulating stepped portion 32) that is separated from 6). The interlocking body (32) is rotated by the operation knob (34) against the biasing force of an elastic body (for example, a spring 33) that biases the interlocking body (32) to move to the release position (P). Set 7) to the restriction position (Q). In the present invention, the structure of the swing lock mechanism can be simplified by simplifying the structure of the operating means for the pusher (6).
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a swing-type razor according to an embodiment of the present invention will be described with reference to the drawings.
[0020]
As shown in FIG. 1, the swinging razor includes a razor head 1 and a holder 2 that supports the razor head 1 so that the head can swing. In the head 3 of the holder 2, a support arm 4, an opening / closing operation unit 5, a pusher 6, a lock body 7, and a lock operation mechanism 8 which will be described in detail later are provided.
[0021]
<Razor head 1>
Three blade bodies 9 are exposed on the front side of the razor head 1. On the back side, support holes 10 (support portions) are formed on both left and right sides (both sides in the left and right direction Y, which is the blade tip extending direction of the blade body 9), and a pressure receiving portion 11 is formed at the center in the left and right direction Y. In addition, contact portions 12 are formed adjacent to the left and right sides of the pressure receiving portion 11.
[0022]
<Both support arms 4>
The both support arms 4 are rotatably supported by support shafts 13 on both the left and right sides in the head 3 of the holder 2, and support arm portions 14 and interlocking arm portions 15 extending from the left and right support shafts 13. It consists of. The distal end portions of the left and right support arm portions 14 protrude outward from the front side of the head 3 of the holder 2 and have support protrusions 16 (support portions) facing each other on the outside. In the head 3 of the holder 2, an interlocking convex portion 17 (interlocking portion) is formed at the tip of the left and right interlocking arm portions 15 so as to face each other between the left and right support shafts 13. When the left and right support arms 4 pivot about the left and right support shafts 13, the support protrusions 16 of the left and right support arm portions 14 approach and separate from each other and open and close.
[0023]
<Opening / closing operation unit 5>
The opening / closing operation unit 5 is integrally connected to a movable body 18 inserted between the interlocking arm portions 15 of the left and right support arms 4 in the head 3 of the holder 2 and an upper side of the movable body 18. And a finger holder 19 exposed from the upper side of the head 3 of the holder 2. A guide hole 20 is formed in the movable body 18 so as to extend in the front-rear direction X and is opened on the front side thereof. A stopper hole 21 is formed below the movable body so as to extend in the front-rear direction X, and communicates with the guide hole 20 on the upper side. An interlocking recess 22 (interlocking part) is formed on the left and right sides of the movable body 18. The left and right interlocking recesses 22 are engaged with the interlocking protrusions 17 of the left and right support arms 4. The opening / closing operation unit 5 moves by a certain range in the front-rear direction X and takes a forward position F (see FIG. 3) and a backward position R (see FIGS. 1 and 2). At the retracted position R of the opening / closing operation unit 5, the left and right support arms 4 are rotated by the engagement between the interlocking projections 17 and the left and right interlocking recesses 22 of the opening / closing operation unit 5. To close each other and close. By the closing movement, the support protrusions 16 of the left and right support arms 4 are engaged with the left and right support holes 10 of the razor head 1, and the razor head 1 moves in the vertical direction Z around the left and right support protrusions 16. It rotates within a certain angle range along the vertical plane. At the forward movement position F of the opening / closing operation unit 5, the left and right support arms 4 are opened apart from each other by the left and right support projections 16, and the support projections 16 of the left and right support arms 4 are both left and right of the razor head 1. The razor head 1 is detached from the holder 2 through the support hole 10.
[0024]
<Pusher 6>
The pusher 6 includes a front pressure prefix portion 23 and a rear butt portion 24, and the butt portion 24 is inserted into the guide hole 20 of the movable body 18 of the opening / closing operation unit 5 from the front side. A stopper projection 25 is formed below the bottom portion 24 and is engaged with the stopper hole 21 of the movable body 18. The pressure prefix 23 protrudes from the front side of the head 3 of the holder 2 between the support protrusions 16 of the left and right support arms 4. At the distal end portion of the pressure prefix portion 23, the arm portion 26 in the left-right direction Y perpendicular to the swinging direction of the razor head 1 (the direction rotating within a certain angle range along the vertical plane including the up-down direction Z). And a pressure contact portion 27 is formed between the left and right arms 26, and a support recess 27a (see FIG. 4) is formed between the arms 26 and the pressure contact 27. As shown in FIG. 4, the height dimension H <b> 27 of the pressure contact portion 27 in the swinging direction of the razor head 1 is larger than the height dimension H <b> 26 of the left and right arm portions 26. The pusher 6 moves in the front-rear direction X as long as the stopper projection 25 can abut against both front and rear end portions of the stopper hole 21. A compression coil spring 28 (elastic body) is supported between the bottom 24 of the pusher 6 and the movable body 18 in the guide hole 20 of the movable body 18, and the pusher 6 is moved forward by the elastic force of the compression coil spring 28. Is being energized. The pressure prefix 23 of the pusher 6 is pressed against the razor head 1 as the head swings. In the pressure contact state, the pressure contact portion 27 of the pressure prefix portion 23 presses the V-shaped pressure receiving surface 11 a of the pressure receiving portion 11 of the razor head 1, and the left and right arm portions 26 of the pressure prefix portion 23 are pressure received by the razor head 1. The left and right sides of the part 11 are sandwiched.
[0025]
<The lock body 7>
The lock body 7 includes left and right lock arms 30 that are inserted in the head 3 of the holder 2 so as to be movable in the front-rear direction X and extend forward from the left and right sides of the rear frame portion 29. The left and right lock arms 30 are disposed adjacent to the left and right sides of the movable body 18 and the pusher 6 of the opening / closing operation unit 5 and have a regulating head 31 at the front end. A regulation step part 32 (regulation part) is formed opposite to each other at the center in the front-rear direction X of the left and right lock arms 30. The left and right restricting step portions 32 function as interlocking means for the pusher 6 and can come into contact with the left and right sides of the rear portion of the pressure prefix portion 23 of the pusher 6 as the lock body 7 moves back and forth.
[0026]
<The lock operation mechanism 8>
In the lock body 7, a compression coil spring 33 (elastic body) is supported between the left and right lock arms 30 between the rear frame portion 29 and the head 3 of the holder 2, and is locked by the elastic force of the compression coil spring 33. The body 7 is urged backward. The restriction heads 31 of the left and right lock arms 30 can come into contact with the left and right contact portions 12 of the razor head 1 as the lock body 7 moves back and forth.
[0027]
In the head 3 of the holder 2, the operation knob 34 (eccentric cam) rotates in the left-right direction Y behind the movable body 18 and the finger rest part 19 of the opening / closing operation part 5 and the rear frame part 29 of the lock body 7. The center line 34a is supported so as to be rotatable. The operation knob 34 has a finger holder 35 exposed from the upper side of the head 3 of the holder 2. On the outer peripheral surface of the operation knob 34, a restricting surface 36 and a release surface 37 having different distances from the rotation center line 34a are formed. When the operation knob 34 is rotated along the longitudinal direction that is the extending direction of the holder 2, the restricting surface 36 having a large radius comes into contact with the rear frame portion 29 of the lock body 7, and the lock body 7 becomes the compression coil spring 33. It moves forward against the elastic force. Further, when the release surface 37 having a small radius comes into contact with the rear frame portion 29 of the lock body 7, the lock body 7 moves rearward by the elastic force of the compression coil spring 33.
[0028]
<Usage example of swinging razor>
1 in the unlocked state shown in FIG. 1. When the opening / closing operation unit 5 is in the retracted position R, the left and right support arms 4 are closed together, and the razor head 1 can swing in a certain angle range.
[0029]
The operation knob 34 is in the release position P. The release surface 37 of the operation knob 34 comes into contact with the rear frame portion 29 of the lock body 7, and the lock body 7 moves rearward by the elastic force of the compression coil spring 33 to reach the release position P. At the release position P of the lock body 7, the restriction heads 31 of the left and right lock arms 30 are separated from the left and right contact portions 12 of the razor head 1 to be in an unlocked state, and the left and right lock arms 30 are restricted. The stepped portion 32 is separated from the pressure prefix portion 23 of the pusher 6 so that the pusher 6 enters the release state A (lock release state). Therefore, the razor head 1 stops in a neutral state (a free state in which no shave force is applied to the razor head 1), and can swing from the neutral state to the vertical direction Z. In this case, the movable body 18 and the finger holding unit 19 of the opening / closing operation unit 5 maintain the retracted position R regardless of the lock body 7.
[0030]
In this neutral state, as shown in FIG. 4, the height dimension H27 of the pressure contact portion 27 is increased in the pressure prefix portion 23 of the pusher 6, and the distance W between the upper and lower fulcrum portions 27b which are contact portions with respect to the pressure receiving surface 11a is also obtained. Can be bigger. Therefore, when the pressure receiving portion 11 of the razor head 1 is supported by the upper and lower fulcrum portions 27b of the pressure contact portion 27, the upper and lower fulcrum portions 27b having a large interval W receive the force applied to the razor head 1 particularly at the beginning of shaving. . Therefore, it is possible to prevent the razor head 1 from swinging in the swinging direction, particularly at the beginning of shaving.
[0031]
Further, as described above, when the interval W between the upper and lower fulcrum portions 27b is increased, the rotation center of the razor head 1 (the left and right support holes 10 of the razor head 1 and the support protrusions 16 of the left and right support arms 4). The radius from the engaging portion) to the upper and lower fulcrum portions 27b is increased. Therefore, when the swing angle of the razor head 1 is the same, the moving distance of the pusher 6 that is pushed and moved by the pressure receiving portion 11 of the razor head 1 increases, and the contraction distance of the compression coil spring 28 increases. Therefore, the rebound elastic force of the compression coil spring 28, that is, the restoring force of the razor head 1 is increased, and the razor head 1 can be smoothly restored.
[0032]
Furthermore, since the height dimension H26 of the left and right arm parts 26 is made smaller than the height dimension H27 of the pressure contact part 27, the left and right arm parts 26 are also swung at the back of the razor head 1 even when the razor head 1 is swung. Becomes difficult to hit the back side of the razor head, the rotation range of the razor head 1 is widened, and the head can be swung smoothly.
[0033]
* Locked state shown in FIG. 2 When the operating knob 34 is set to the restricting position Q from the unlocked state shown in FIG. 1, the restricting surface 36 of the operating knob 34 comes into contact with the rear frame portion 29 of the lock body 7 and locks. The body 7 moves forward against the elastic force of the compression coil spring 33 and becomes the restriction position Q. At the restriction position Q of the lock body 7, the restriction heads 31 of the left and right lock arms 30 come into contact with the left and right contact parts 12 of the razor head 1 to be locked, and the restriction steps of the left and right lock arms 30 are also locked. The part 32 comes into contact with the pressure prefix 23 of the pusher 6 and the pusher 6 enters the restricted state B (locked state). Incidentally, the position of the pusher 6 in the neutral state hardly changes either in the release state A (lock release state) in FIG. 1 or in the regulation state B (lock state) in FIG. Accordingly, the razor head 1 is locked in a neutral state (a free state in which no shave force is applied to the razor head 1) and cannot swing. Even in this neutral state (locked state), the pressure receiving portion 11 of the razor head 1 is supported by the upper and lower fulcrum portions 27b of the pressure contact portion 27 as described above. Therefore, the upper and lower fulcrum portions 27b having a large interval W receive the force applied to the razor head 1. Therefore, the swinging lock with respect to the razor head 1 can be reliably performed. In this case, the movable body 18 and the finger holding unit 19 of the opening / closing operation unit 5 maintain the retracted position R regardless of the lock body 7.
[0034]
On the other hand, when the operation knob 34 is set to the release position P from this locked state, the unlocked state shown in FIG. 1 is restored.
* The razor head detachable state shown in FIG. 3 The opening / closing operation unit 5 is in the forward position F, the left and right support arms 4 are moved toward each other, and the razor head 1 is detached from the holder 2.
[0035]
[Another example]
* In the left and right lock arms 30 of the lock body 7, the restriction head 31 is omitted, and the restriction step 32 is formed. In that case, the lock body 7 does not have a lock function, and simply functions as an interlocking body that transmits the movement of the operation knob 34 to the pusher 6. Accordingly, only the pusher 6 performs a locking function.
[0036]
* For the movable body 18 and finger holder 19 of the opening / closing operation section 5, the pusher 6, the lock body 7, and the operation knob 34 of the lock operation mechanism 8, not only plastic but also glass fiber is mixed in plastic. A composite material may be used to increase the strength, or a composite material in which silicon is mixed with plastic may be used to improve the slidability. The support arm 4 may be made of a similar composite material as well as a metal.
[Brief description of the drawings]
FIG. 1 (a) is a partial cross-sectional view, as seen from the front side, showing the unlocked state in which a razor head is supported by a holder in a swing-type razor according to the present embodiment, and FIG. It is the fragmentary sectional view which looked at from the plane side.
2A is a partial cross-sectional view of a locked state in which a razor head is supported by a holder in a swing-type razor according to the present embodiment as viewed from the front side, and FIG. It is the fragmentary sectional view seen from the plane side.
FIG. 3A is a partial cross-sectional view of a state in which the razor head is separated from the holder in the swing-type razor according to the present embodiment as viewed from the front side, and FIG. It is the fragmentary sectional view which looked at from the plane side.
4A is a partial perspective view showing a pressure prefix portion of the pusher shown in FIGS. 1 and 2, and FIG. 4B is a partially enlarged sectional view of FIGS. 1 and 2 showing a pressure contact state of the pusher with respect to the razor head. is there.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Razor head, 2 ... Holder, 6 ... Pusher, 7 ... Lock body (interlocking body), 11 ... Pressure receiving part, 11a ... Pressure receiving surface, 12 ... Contact part, 23 ... Pressure prefix part, 26 ... Arm part, 27 DESCRIPTION OF SYMBOLS ... Pressure-contact part, 28 ... Compression coil spring (elastic body), 31 ... Restriction head, 32 ... Restriction level | step-difference part (interlocking means) which is a regulation part, 33 ... Compression coil spring (elastic body), 34 ... Operation knob, 35 ... finger holder, H26 ... arm height, H27 ... pressure contact height, P ... release position, Q ... restriction position, A ... release state, B ... restriction state.

Claims (3)

A swing-type razor comprising a razor head and a holder that supports the razor head so that the pressure-receiving portion formed on the razor head is urged so as to come into pressure contact with the head swing. In
The pressure prefix portion of this pusher is provided with an arm portion that sandwiches both sides of the pressure receiving portion of the razor head in a direction perpendicular to the swinging direction of the razor head, and the pressure receiving portion of the razor head is interposed between the both arm portions. A swing-type razor characterized in that a pressure-contact portion that presses the pressure-receiving surface is provided, and the height dimension of the pressure-contact portion is larger than the height dimension of both arms in the swinging direction of the razor head. The swinging razor according to claim 1 , wherein the pusher can take a restricted state that prevents the razor head from swinging and a released state that allows the pusher to swing. In the operation means for setting the pusher to the restricted state and the released state,
An operation knob having a finger rest is provided to be rotatable between a restriction position and a release position. Between the operation knob and the pusher, a restriction position is set at the restriction position of the operation knob and at a release position of the operation knob. An interlocking body that takes the release position is provided,
This interlocking body has a restricting portion that contacts the pusher so as to restrict the pusher at the restricting position and is separated from the pusher so as to cancel the restriction of the pusher at the releasing position.
3. The neck according to claim 2 , wherein the interlocking body is set to a restricting position by a turning operation of the operation knob against a biasing force of an elastic body that biases the interlocking body to move to the release position. Swing razor.

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