JPH10137458A - Cutter knife - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cutter knife whose edge can be automatically locked step by step only by means of two members, a slider main body and an operational member. SOLUTION: A slider comprises a slider main body part 2 and an operational member 3. An engaging protrusion 2d to engage with the engaging recessed part of a holder, which is not shown in Fig., is formed at the tip of an integrally molded arm part 2e in the slider main body part 2. The operational member 3 is supported movably in forward and backward directions by an operational member supporting part 2c and is engaged with the arm part by its engaging groove 3b. It is possible to release an engaging protruded part 2d from the engaging recessed part by moving the operational member and bending the arm part 2e downward by the inclined face of the engaging groove 3b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutter knife in which the position of the cutter blade is regulated stepwise, and more particularly to a cutter knife capable of automatically locking the cutter blade at a regulated position.

[0002]

2. Description of the Related Art Auto-lock type cutter knives are advantageous in that the cutter blades can be securely inserted and removed, and that the cutter blades can be easily locked when used. For example, in a cutter knife described in Japanese Utility Model Publication No. 3-37575, a slider is biased by a restoring spring provided on a slider body member, and a latch biased by a biasing spring is provided on an engaging recess of a holder. , The sliding knob is moved forward and backward, and the latch is moved by the V-shaped groove to release the engagement. In this cutter knife, the slider uses a slider body member, a sliding knob, and four parts of two spring members,
There is a problem that not only the manufacturing cost is increased but also the assembling time is required. The slider of the cutter knife described in Japanese Utility Model Publication No. 2-20991 and Japanese Patent Publication No. 7-85752 also requires three points, a slider body member, a sliding member, and a spring made of a metal wire or a metal plate. Is required to be positioned at a predetermined position and assembled, which causes a problem that the assembling time is required.

[0003]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and the cutter blade is stepped by using only a slider body member and an operation member. An object of the present invention is to provide a cutter knife that can be automatically locked.

[0004]

According to a first aspect of the present invention, there is provided a holder having a plurality of engagement recesses formed on an upper surface thereof and having a slide groove into which a cutter blade is inserted so as to be movable back and forth, In a cutter knife having a slider inserted into the slide groove and formed to be able to mount the cutter blade, the slider is movably supported by a slider main body member formed of an elastic synthetic resin and the slider main body. The slider main body member includes an arm member having an engagement convex portion engageable with the engagement concave portion, and the operation member moves the engagement convex portion by a moving operation. The arm member is bent against its elasticity so as to be released from the joint recess.

According to a second aspect of the present invention, in the cutter knife according to the first aspect, the operating member has a mountain-shaped cam surface that comes into contact with the arm member, and moves back and forth on the slider body member. The arm member is bent against its elasticity by a forward or rearward movement operation to release the engagement convex portion from the engagement concave portion. is there.

According to a third aspect of the present invention, in the cutter knife according to the first aspect, the operating member has a surface in contact with the arm member, and is supported by the slider body member so as to be vertically movable. The downward movement of the arm member causes the arm member to bend against its elasticity, thereby releasing the engagement projection from the engagement recess.

[0007]

1 to 4 are views for explaining a first embodiment of a cutter knife according to the present invention. FIG. 1A is a plan view of a main part of the cutter knife, and FIG. 1 (B)
FIG. 1A is a plan view showing a state where an operation member is removed in FIG.
FIG. 2 is a cross-sectional view taken along line AA of FIG. 1A, and FIG.
FIG. 3A is a cross-sectional view of a holder, FIG. 4 is an exploded perspective view of a slider, FIG. 4A is a perspective view of an operation member, and FIG. Perspective view of member, FIG.
4C is a perspective view of the slider body member, and FIG. 4D is a perspective view of FIG. 4C with a part cut away. FIG.
Then, cross hatching was applied to make the holder part easier to see. In the drawing, 1 is a holder, 1a is a slide groove, 1b is an uneven portion, 1c is an engaging concave portion, 2 is a slider main body portion, 2a is a substrate, 2b is a mounting pin, 2c is an operation member support portion, and 2d is an engaging convex portion. , 2e is an arm, 2f is a protrusion, 2g is a sliding part, 2h is a slot, 2i is a step, 3 is an operation member, 3a is a protrusion, 3b is an engagement groove, and 4 is a spring member. .

The holder 1 is shown in FIGS. 1, 3A and 3B.
As shown in the figure, a metal plate is bent into a C-shape to form a slide groove 1a. A corrugated uneven portion 1b is formed at one edge of the opening, and the other edge of the opening is formed. Are formed with a large number of engaging recesses 1c. The material of the holder is not limited to the metal plate, and a synthetic resin may be used. Outside the holder 1, a grip made of, for example, a synthetic resin may be provided so as to surround the holder 1.

The slider is provided in the slide groove 1 of the holder 1.
a, the cutter blade (not shown) attached thereto can be moved back and forth. This slider is a slider body member 2
And the operation member 3.

As shown in FIG. 4C and FIG. 4D in which a part of the slider body member 2 is cut out, an attaching pin for attaching a cutter blade to one end of a flat substrate 2a is provided. 2b, an operation member support portion 2c, and an engagement protrusion 2d. The mounting pin 2b can connect the cutter blade to the slider body by fitting a mounting hole of the cutter blade (not shown). The operation member supporting portion 2c supports the operation member so as to be movable in the front-rear direction. In this embodiment, as shown in FIG. The operation member 3 is attached to the slider main body member 2 by engaging with the projection 3a facing the slider body 2.

The engaging projection 2d is formed integrally with the tip of an arm 2e provided integrally with the slider body 2. The slider body 2 is made of a material having elasticity, for example, synthetic resin such as polyethylene or nylon, and is integrally formed. The arm portion 2e is designed so that the slider main body portion 2 is inserted into the holder 1 so that the engaging convex portion takes a position where the engaging convex portion engages with the engaging concave portion of the holder 1.

As described above, the operating member 3 is slidably supported by the operating member supporting portion 2c of the slider body 2. In the neutral state, the center of the chevron-shaped engaging groove 3b is positioned at the arm portion 2e. Is positioned so as to straddle the extended part of. The operation member 3 can move back and forth around this position. The moving range is limited to a predetermined range by a stepped portion 2i formed by denting the side surface of the operation member supporting portion 2c. In the neutral state, as shown in FIGS. 1 (A), 2 and 3 (A), the engaging projection 2d is engaged with the engaging recess of the holder 1 to lock the slider, and a cutter (not shown) The movement of the blade is blocked. In this embodiment, the engaging protrusion 2e is extended inward and the extended portion is engaged with the engaging groove 3b. However, the portion of the arm 2e which engages with the engaging groove 3b is used. Is not necessarily limited to the shape obtained by extending the engagement convex portion 2d, but may be formed in an appropriate shape. 2g is the slider body 1
It is a sliding part that is formed so as to project slightly outward from
With the slider inserted into the holder 1, the sliding portion 2g
Slides against the side wall of the holder 1 and presses it to suppress the play.

To move the cutter blade, the operating member 3
Is moved in the movement direction with a finger. This state is shown in FIGS. For example, the operation member 3 is moved to the right in the drawing with respect to the slider body 2. Then, the engaging projection 2
The extended portion of d is formed by the slope on the left side of the drawing of the engagement groove 3b.
It is pushed downward against the elasticity of the arm portion, and the engaging projection 2d is lowered downward to disengage from the engaging recess of the holder 1. The detachment of the engaging projection from the engaging recess makes it possible to further move the operating member 3 rightward in the drawing, and to move the slider to a desired position. When the finger is released from the operation member 3 in a state where the slider is moved to a desired position, the arm portion 2e returns to the position in FIG. 2 due to its elasticity, and the slider can be locked. With the return of the arm portion, the extended portion of the engagement convex portion hits the slope of the engagement groove 3b, and the operation member 3 can be returned to the original neutral position. When the slider is moved in the direction opposite to the above description, when the operating member 3 is moved to the left in the drawing, the extended portion of the engaging projection 2d is formed by the right slope of the engaging groove 3b in the drawing. Pushed downward against the elasticity of the arm,
Similarly, the engaging projection can be disengaged from the engaging recess, and the operation member 3 can be further moved leftward in the figure.

In this embodiment, the spring member 4 shown in FIG. 4B and the corrugated uneven portion 1b shown in FIG. 1 allow a click operation to be performed when the slider is moved. This will be described below. The spring member 4 is
It is inserted into the slot 2h of the operation member support portion 2c, and the central projecting portion is engaged with the corrugated uneven portion 1b. Therefore, when the slider is moved, the movement position is regulated by the corrugated portion 1b, and the slider can be moved stepwise. By this stepwise movement, the locked position of the slider can be further ensured.
However, regarding the movement of the slider, the spring member 4
Since the undulations 1b are not indispensable, a simpler configuration can be adopted by omitting them.

It is preferable to use a material having elasticity also for the operating member, so that the slider can be assembled by the spring member 4.
Is inserted into the slot 2h of the operation member support 2c, and then the operation member 3 can be connected to the slider body 2 simply by pressing the operation member 3 from above the operation member support 2c, and the slider is assembled by a simple operation. be able to.

FIG. 7 is a view for explaining a cutter knife according to a second embodiment of the present invention.
It is sectional drawing similar to. In the drawing, the same parts as those in FIGS. 3A and 6 are denoted by the same reference numerals, and description thereof will be omitted. In the first embodiment, when the slider is moved, the operation member is moved in the front-rear direction. In this embodiment, the operation member 3 is moved downward. It is not necessary to allow movement in the front-back direction. That is, FIG.
As shown in (A), the protrusion 2f of the operation member support 2c.
A play that can move up and down is provided between the control member 3 and the projection 3a of the operation member 3. In the locked state, the operating member 3 is pushed upward by the elastic force of the arm member 2e, and the protrusion 2f and the protrusion 3a are in contact. To release the lock, as shown in FIG. 7 (B), the operating member 3 is pressed downward, whereby the arm portion 2e is pressed down against its elasticity, and the engaging projection 2d is disengaged from the engaging concave portion. Thus, the slider can be moved in the front-back direction.

In this embodiment, the operating member 3 does not necessarily need the engaging groove provided in the first embodiment, and the portion engaging with a part of the arm 2e is simply flat. I just did it. Of course, an engagement groove may be provided. In short, when the operating member is pushed down and moved downward, the arm is bent, and when the finger is released from the operating member, the arm returns with its elasticity and the operating member can be moved to the original position. .

[0018]

As is clear from the above description, according to the present invention, there is an effect that the slider on which the cutter blade is mounted can be locked and released with a small number of parts.

[Brief description of the drawings]

FIG. 1 is a view for explaining a first embodiment of a cutter knife according to the present invention. FIG. 1 (A) is a plan view of a main part of the cutter knife, and FIG. 1 (B) is FIG. 1 (A). FIG. 4 is a plan view showing a state where an operation member is removed in FIG.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3A is a sectional view taken along line BB of FIG. 1A, and FIG. 3B is a sectional view of a holder.

4A and 4B are exploded perspective views of the slider according to the first embodiment, FIG. 4A is a perspective view of an operation member, FIG. 4B is a perspective view of a spring member, and FIG. FIG. 4D is a perspective view of the main body member, in which a part of FIG. 4C is cut away.

FIG. 5 is an explanatory diagram of an unlocked state according to the first embodiment.

FIG. 6 is an explanatory diagram of an unlocked state according to the first embodiment.

FIG. 7 is a sectional view similar to FIGS. 3A and 6 for explaining a cutter knife according to a second embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Holder, 1a ... Sliding groove, 1b ... Uneven part, 1c
... engaging recess, 2 ... slider body, 2a ... board, 2b
... Mounting pins, 2c ... operating member support parts, 2d ... engagement convex parts,
2e: arm, 2f: protrusion, 2g: sliding part, 2h ...
Slot, 2i step, 3 operation member, 3a protrusion, 3b
... engagement groove, 4 ... spring member

Claims (3)

[Claims] 1. A holder having a plurality of engagement recesses formed on an upper surface thereof and having a slide groove into which a cutter blade is inserted so as to be movable forward and backward, and the cutter blade being inserted into the slide groove of the holder and being capable of mounting the cutter blade. In a cutter knife having a slider formed in, the slider,
A slider main body member formed of an elastic synthetic resin and an operation member movably supported by the slider main body portion, wherein the slider main body member has an engagement convex portion engageable with the engagement concave portion. A cutter knife, comprising: an arm member having the operating member, wherein the operating member bends the arm member against its elasticity so as to release the engaging projection from the engaging recess by a moving operation. 2. The operation member has a mountain-shaped cam surface that comes into contact with the arm member, and is supported by the slider body member so as to be able to move back and forth, and the arm member is moved by moving forward or backward. The cutter knife according to claim 1, wherein the engaging projection is bent from the engaging recess by bending the engaging knife against the elasticity. 3. The operation member has a surface that comes into contact with the arm member, is supported by the slider body member to be vertically movable, and moves the arm member against its elasticity by a downward movement operation. The cutter knife according to claim 1, wherein the engaging projection is released from the engaging recess by bending.