JPH08103578A - Blade change type razor - Google Patents

Abstract

PURPOSE: To improve durability of a blade change type razor by restraining excessive deformation of an energizing member at the time of attaching and detaching a movable clamping member. CONSTITUTION: A blade change type razor comprises a fixed clamping plate 10 formed integrally with a handle rotatably fitted to a sheath and a movable clamping plate fitted to the fixed clamping plate 10 to clamp a blade body in co-operation with the fixed clamping plate 10. A deformation restraining part 22 for restraining excessive deformation of a plate spring 25 is formed according to the shape of the plate spring 25 in a position opposite to a peak part 25a of the plate spring 25 formed substantially like a M-shape on the spring mounting part 20 of the fixed clamping plate 10. Accordingly, at the time of attaching and detaching the movable clamping plate, the plate spring 25 is prevented from being deformed more than needed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a replaceable blade type razor blade that is used by sandwiching a blade between two detachable sandwiching members.

[0002]

2. Description of the Related Art Conventionally, a blade is interposed on the ventral side of two sandwiching members, and a pivotal support portion formed near the center of both sandwiching members serves as a fulcrum to support the back of both sandwiching members. Various blade-type razors have been put into practical use in which the blade body is sandwiched by pushing the side by the urging force of the urging member.

For example, Japanese Utility Model Publication No. 5-40865 discloses a replaceable blade razor R2 as shown in FIG. Here, FIG. 7 shows a perspective view of the fixed sandwiching plate 40 among the two sandwiching plates 40 constituting the replaceable blade razor R2. A leaf spring 41 having a substantially M-shaped side cross section is attached to a spring mounting portion 42 on the fixed sandwiching plate 40 that constitutes the spare blade razor R2, and below the spring mounting portion 42, Two support cylinders 43a and 43b functioning as a rotation support portion are provided.

Further, a front (right side in FIG. 6) support cylinder 43a.
Is formed shorter than the rear support cylinder 43b in order to prevent the support shaft from being disengaged by receiving the locked portion of the support shaft of the movable holding plate. Further, below the support cylinders 43a and 43b, a blade sandwiching portion 44 on which the blade is mounted while being positioned.
Are formed.

On the other hand, in the movable holding plate (not shown) which also constitutes the replaceable blade type razor R2, each support cylinder 43 has a concave portion pressed by the leaf spring 41 and a support shaft functioning as a rotation supporting portion.
It is formed so as to correspond to a and 43b. Further, a locked portion is formed on a support shaft corresponding to the front support cylinder 43a, and a blade body mounted on a fixed holding plate is clamped below the support shaft. A blade sandwiching portion for cutting is formed.

The support shafts are connected to the support cylinders 43a and 43b.
When inserted into the blade, the movable holding plate is locked by the fixed holding plate 40, and the elastic force of the plate spring 41 pushes the concave portion outwardly to insert the blade holding portion 44 into the blade. The body is clamped and fixed. When the back portion of the movable sandwiching plate is pushed open, the supported sandwiched portions of the support shaft are locked by the support cylinders 43a and 43b, so that the movable sandwiching plate is released from the fixed sandwiching plate 40. It has the advantage that separation is prevented.

[0007]

However, the leaf spring 4 is attached to the spring mounting portion 42 of the conventional blade razor R2.
The deformation suppressing portion for suppressing the deformation of No. 1 was not formed. That is, nothing is formed between the lower surface of the mountain portion of the substantially M-shaped leaf spring 41 and the spring mounting portion 42.

Therefore, the movable holding plate is fixed to the fixed holding plate 40.
When it is fitted to the plate spring, there is a problem in that the recess causes excessive stress to act on the leaf spring 41 and the leaf spring 41 is deformed more than necessary. Under such a condition, by repeatedly attaching and detaching the movable sandwich plate, fatigue is accumulated in the leaf spring and elastic force is gradually lost, and finally the blade body is sufficiently sandwiched. There was a risk that it would not be possible.

The present invention has been made to solve the above-mentioned conventional problems, and suppresses excessive deformation of the urging member when the movable pinching member is attached / detached, and thus the durability of the replaceable blade razor is improved. The purpose is to improve.

[0010]

In order to achieve the above object, a replaceable blade type razor according to the present invention is formed on a blade mounting portion on which a blade is mounted, and on an upper portion of the blade mounting portion. A locking portion, a biasing member mounting portion formed on the locking portion, and a deformation suppressing portion that suppresses excessive deformation of the biasing member, and the biasing member mounting portion. A fixed pinching member having a biasing member to be mounted, a blade pinching part for pinching the blade by the cooperation of the blade mounting part, and an upper part of the blade pinching part. In addition, the movable portion includes a locked portion that is rotatably locked to the locking portion, and a pressed portion that is formed on the locked portion and that is pressed by the biasing member. And a sandwiching member as a configuration.

[0011]

In the replaceable blade type razor according to the present invention having the above-mentioned structure, in the state where the blade body is placed on the blade body placing portion of the fixed holding member, the fixed holding portion is pressed while pressing the back portion of the movable holding member. By inserting the locked portion of the movable pinching member into the locking portion of the fastening member, the movable pinching member is combined with the fixed pinching portion. At this time, the biasing member in the biasing member mounting portion is
It deforms because it is pressed by the pressed portion of the movable sandwiching member, but since the deformation suppressing portion that suppresses excessive deformation of the biasing member is formed in the biasing member mounting portion, such deformation suppressing Excessive deformation of the biasing member is suppressed by the portion, and it does not deform more than necessary.

When the movable sandwiching member is completely engaged with the fixed sandwiching member and the pressing of the movable sandwiching member is stopped, the biasing member presses the pressed portion of the movable sandwiching member to move it. Spread the back of the sandwiching member. Here, since the movable pinching member is rotatably locked to the fixed pinching member by the locked portion, the blade pinching part of the movable pinching member is the blade pinion of the fixed pinching member. The blade body is approached to the mounting portion and the blade body is sandwiched.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is embodied in a replaceable razor will be described below with reference to the drawings.

First, the structure of the replaceable blade type razor R1 according to this embodiment will be described with reference to FIGS. The replaceable blade type razor R1 includes a sheath 2, a handle 1 rotatably attached to the sheath 2, and a fixed clamping plate 10 formed integrally with the handle 1.
And the fixed holding plate 10 while facing the fixed holding plate 10.
And a movable sandwiching plate 30 that sandwiches the blade body in cooperation with.

As shown in FIGS. 2 and 3, the fixed sandwiching plate 1 is provided.
Reference numeral 0 denotes a blade mounting portion 11 on which a blade (not shown) is mounted while being positioned, and support cylinders 15 and 16 on which a support shaft (described later) of the movable sandwiching body is rotatably supported. The spring mounting portion 20 and the leaf spring 25 mounted on the spring mounting portion 20 are provided.

The blade mounting portion 11 is formed so as to be smooth from the vicinity of the center in the vertical direction of the fixed sandwiching plate 10 to the lower edge thereof, and the uppermost part thereof is provided with the vertical movement of the blade. A locking projection 12 for limiting is formed. The movement of the blade body in the proximal direction of the fixed holding plate 10 (left side in FIGS. 2 and 3) is limited by the wall-shaped portion 13 that locks the movable holding plate 30.

A guide groove 14 having a semicircular cross section extending from the base end side to the tip end side is formed on the upper surface of the locking projection 12, and the support shaft of the movable holding plate 30 serves as a guide. Groove 14
It reaches the support cylinders 15 and 16 while being guided by.

The support cylinders 15 and 16 are formed at the front end side and the base end side of the guide groove 14 having a semicircular cross section by a cylindrical body whose opening faces the front base end side. The support cylinder 15 is formed to be shorter than the support cylinder 16 on the base end side for locking the locked portion 34c of the support shaft 34.

The spring mounting portion 20 is a leaf spring 25 to be mounted.
Is formed so as to correspond to the dimension, and a spring mounting protrusion 21 for defining the mounting position of the leaf spring 25 to be mounted is formed in the central portion thereof.

The leaf spring 25 is formed in a substantially M-shape when viewed from the side, and a mounting hole 26 formed in the central portion thereof is engaged with a spring mounting projection 21 of the spring mounting portion 20 so that a locking washer is provided. It is movably attached by 27. Also,
As shown in FIG. 4, in the spring mounting portion 20, a deformation suppressing portion 22 that suppresses excessive deformation of the leaf spring 25 is provided at a position corresponding to the mountain-shaped portion 25 a of the leaf spring 25. It is formed along.

As shown in FIG. 6, the movable sandwiching plate 30 is inserted into the support cylinders 15 and 16 and the blade sandwiching portion 31 that sandwiches the blade in cooperation with the blade mounting portion 11. Support shafts 34, 35
And a pressed portion 36 that is pressed by the leaf spring 25.

The blade sandwiching portion 31 is formed smoothly from the vicinity of the vertical center of the movable sandwiching plate 30 to the lower edge portion, and the uppermost portion thereof receives the locking projection 12. , A band-shaped groove 32 having a stepped cross section corresponding to the locking projection 12
Are formed.

A guide groove 33 having a semicircular cross section is formed on the upper surface of the band-shaped groove 32 and extends toward the front base end side.
By sliding the guide groove 33 and the support cylinders 15 and 16 in an engaged state, the support shafts 34 and 35 are guided to the support cylinders 15 and 16.

The support shafts 34, 35 are composed of shaft portions 34a, 35a inserted into the support cylinders 15, 16, and fixing portions 34b, 35b for fixing the shaft portions 34a, 35a to the movable holding plate 30. The shaft portion is arranged on the front end side and the base end side of the guide groove 33 so as to face the base end side. Further, around the shaft portion 34a of the support shaft 34 located on the tip end side, a locked portion 34c for being reliably locked to the support cylinder 15 on the tip end side is formed.

The locked portion 34 is formed near the tip of the shaft portion 34a of the support shaft 34 so as to have a larger cross-sectional diameter than that of the shaft portion 34a. And
After the shaft portion 34a is inserted into the support cylinder 15, the elastic force of the leaf spring 25 causes the locked portions 34 to be locked to the support cylinder 15 as the axes of the two members 15 and 34a are displaced. is there.

Next, the operation of the replaceable blade type razor R1 according to this embodiment having the above construction will be described along with the work of assembling the blade body BR. First, the support shafts 34 and 35 are aligned with the guide groove 14 of the fixed sandwiching plate 10, and the guide groove 33 of the movable sandwiching plate 30 is aligned with the support cylinders 15 and 16. At this time, the rear end (the right end in FIG. 6) of the movable sandwiching plate 30 may be aligned with the mark S protruding from the fixed sandwiching plate 10. Then, the back of the movable holding plate 30 and the fixed holding plate 10
Press the back of your fingertips with your fingertips.

Then, the back portion of the movable holding plate 30 approaches the back portion of the fixed holding plate 10, and the pressed portion 36 presses the substantially M-shaped plate spring 25, so that the respective support shafts 34, 35 move. When the shaft portions 34a, 35a and the support cylinders 15, 16 are located on the same axis, and the movable holding plate 30 is slid in such a state, the support shafts 34, 35 are eventually attached to the support cylinders 15, 16 respectively. The shaft portions 34a and 35a of are inserted.

Here, the leaf spring 25 is deformed by being pressed by the pressed portion 36 when the back portion of the movable holding plate 30 and the back portion of the fixed holding plate 10 are pressed by the fingertips.
At 0, a deformation suppressing portion 22 that suppresses excessive deformation of the leaf spring 25 is formed in conformity with the shape of the substantially M-shaped leaf spring 25. Therefore, the pressed leaf spring 25 has the shaft portions 34a and 35a of the support shafts 34 and 35 and the support cylinders 15 and 1, respectively.
Although it deforms to the extent that 6 and 6 are located on the same axis,
No further deformation occurs.

The movable holding plate 30 is fixed to the fixed holding plate 10.
When the pressing of the back part of the movable sandwiching plate 30 and the back part of the fixed sandwiching plate 10 is stopped when the plate spring 25 comes into contact with the wall-shaped part 13, the plate spring 25 presses the pressed part 36 to return to the non-pressed state. Then, the back of the movable sandwich plate 30 is pushed open.

Here, the movable holding plate 30 includes the support shafts 34,
35 is rotatably inserted into each of the support cylinders 15 and 16 so as to be rotatably locked to the fixed sandwiching plate 10. Therefore, as the back of the movable sandwiching plate 30 expands, the blade sandwiching part 31 moves toward the blade mounting part 11 of the stationary sandwiching plate 10.
Close to. Under this state, the back part of the fixed sandwiching plate 10 and the back part of the movable sandwiching plate 30 are pressed again with fingertips to separate the blade body mounting portion 11 and the blade body sandwiching portion 31 from each other, and the blade body BR is removed. Insert it.

A locked portion 34c having a cross-sectional diameter larger than that of the shaft portion 34a is formed near the tip of the shaft portion 34a of the support shaft 34 on the tip end side. Therefore,
When the shaft portion 34a of the support shaft 34 and the support cylinder 15 deviate from the same axis due to the elastic force of the leaf spring 25, the locked portion 34 is locked to the support cylinder 15, and the support shaft 34 is attached to the tip side. It is securely locked to the support cylinder 15 of. As a result, the movable sandwiching plate 30 will not come off the fixed sandwiching plate 10 unless the back part of the movable sandwiching plate 30 is pressed again.

As described above in detail with reference to the embodiment, the replaceable blade type razor R1 according to this embodiment has the spring mounting portion 20.
In addition, a deformation suppressing portion 22 that matches the shape of the substantially M-shaped plate spring 25 and suppresses excessive deformation of the plate spring 25 is provided.

Therefore, even when the movable holding plate 30 is mounted on the fixed holding plate 10, the leaf springs 25 are attached to the support cylinders 15,
16 and the respective support shafts 34, 35 are deformed only to the extent of being located on the same line, and the mountain-shaped portion 25a of the leaf spring 25
Does not come into contact with the spring mounting portion 20. As a result, even when the movable holding plate 30 is repeatedly attached and detached, the leaf spring 25
Does not accumulate fatigue, and the elastic force of the leaf spring 25 does not decrease. The blade body sandwiched by the blade body mounting portion 11 and the blade body sandwiching portion 31 is always sandwiched by a constant blade body sandwiching force, and the shaving taste (usability) changes. Moreover, the durability of the spare blade razor R1 can be improved.

The present invention can be variously modified and improved without departing from the spirit thereof. For example, in the present embodiment, a substantially M-shaped leaf spring 25 is provided, and the deformation suppressing portion 22 that matches the shape of the leaf spring 25 is formed in the spring mounting portion 20. However, an arc-shaped leaf spring may be provided, and the deformation suppressing portion that matches the spring shape may be formed in the spring mounting portion 20. That is, if the deformation suppressing portion that fills the space between the lower surface of the spring and the spring mounting portion 20 is formed, excessive deformation of the spring can be suppressed, so that the deformation suppressing portion that matches the shape of the spring can be used. All you have to do is prepare.

Further, instead of the support shafts 34 and 35 formed on the movable holding plate 30, a support shaft cylinder is formed, and a separate insertion pin (not shown) is inserted into the support shaft cylinder. You may Further, the locked portion 3 is attached to the support shaft 34 of the movable holding plate 30.
Although 4c is formed, the locked portion 34c may not be formed.

The technical ideas other than the claims that can be understood from the above embodiments will be described below along with their effects. (1) In the replaceable blade razor according to claim 1, a strip-shaped locked portion is formed in the locked portion, and the locked portion receives the locked portion. Spare blade type razor characterized in that a stopper receiving portion is formed.

With such a structure, when the fixed holding member and the movable holding member are combined once and the axes of the locking portion and the locked portion are deviated, the locked portion receiving portion receives The locked portion is locked. Therefore, there is an advantage that the movable holding member can be easily prevented from coming off the fixed holding member. (2) In the replaceable blade type razor according to claim 1 or (1), the urging means is a substantially M-shaped leaf spring, and the urging means mounting portion has a mountain shape of the leaf spring. 2 according to the section
Spare blade razor, characterized in that it is formed with three deformation suppressing parts.

With such a structure, the two deformation suppressing portions suppress excessive deformation of the substantially M-shaped leaf spring,
The durability of the replaceable razor is improved.

[0039]

As described above, the replaceable blade type razor according to the present invention is provided with the deformation suppressing portion for suppressing the excessive deformation of the urging member in accordance with the shape of the urging member in the urging member mounting portion. There is.

Therefore, it is possible to suppress the excessive deformation of the biasing member when the movable pinching member is attached and detached, thereby improving the durability of the replaceable blade razor.

[Brief description of drawings]

FIG. 1 is a perspective view showing an external configuration of a replaceable blade razor.

FIG. 2 is a perspective view showing a configuration of a fixed sandwiching plate according to the present embodiment.

FIG. 3 is a plan view showing a configuration of a fixed sandwiching plate according to the present embodiment.

FIG. 4 is an enlarged cross-sectional view of the fixed sandwiching plate in FIG. 3 taken along the line AA.

FIG. 5 is an explanatory view showing an assembled state of the replaceable blade type razor according to the present embodiment.

FIG. 6 is a perspective view showing a configuration of a movable sandwiching plate according to the present embodiment.

FIG. 7 is a perspective view showing a configuration of a fixed sandwiching plate according to a conventional example.

[Explanation of reference numerals] 10 ... Fixed sandwiching plate, 11 ... Blade mounting portion, 15 ... Tip side support cylinder, 20 ... Spring mounting portion, 21 ... Spring locking projection, 22 ...
Deformation suppressing portion, 25 ... Leaf spring, 26 ... Mounting hole, 30 ... Movable sandwich plate, 31 ... Blade mounting portion, 34 ... Tip side support shaft, 34c
... Locked part, 36 ... Pressed part, R1 ... Spare blade razor, R2
... Spare blade razor according to conventional example

Claims (1)

[Claims] 1. A blade mounting portion on which a blade is mounted, a locking portion formed on an upper portion of the blade mounting portion, and a biasing portion formed on the locking portion. A fixed clamping member having a biasing member mounting portion formed with a deformation suppressing portion for suppressing excessive deformation of the member, and a biasing member mounted to the biasing member mounting portion; Blade clamping part for clamping the blade in cooperation with the blade part, and a locked part formed on the blade clamping part and rotatably locked to the locking part. A replaceable blade type razor, comprising: a movable pinching member formed on an upper portion of the locked portion and pressed by the biasing member.