JP2978810B2 - Structure of holder for blade-retractable cutter knife - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blade retractable type in which the total length of a holder comprising a grip portion and a blade body storage portion fitted into the grip portion can be changed to enhance convenience in various use situations. In a cutter knife, the present invention relates to a holder structure in which holding means (lock mechanism) for holding a blade body storage portion with respect to a grip portion is improved.

[0002]

2. Description of the Related Art A conventional blade-retractable cutter knife disclosed in Japanese Unexamined Patent Publication No. Sho.
As shown in the fourth to eleventh embodiments, the holding means K is configured as follows. In addition, FIGS.
The symbol shown by is used.

[0003] The locking body 22 is provided on the
(B) and the lock position shown in FIG.
It is movably supported so as to take the release position shown in FIG. In the locked position of the locking body 22, the locking body 2
2 is guided by the pressing surface 26 of the gripping portion 2 and flexes inward, and the pressing contact protruding portion 25 of the leaf spring portion 24 is
(Corresponding to a blade body storage section of the present embodiment described later), and the guide section 3 is positioned with respect to the grip section 2.

[0004]

In the above-mentioned conventional holding means K, the locking member 22 is merely attached to the grip portion 2 so as to slightly move between the lock position and the release position. . Therefore, FIGS.
Unlike the first embodiment shown in FIGS. 4 and 5, the second embodiment shown in FIGS. 4 to 5, and the fifth embodiment shown in FIGS. 13), and the appearance is improved. This advantage is
The third embodiment shown in FIGS. 6 to 8 is the same as the fourth embodiment, except that the locking screw 17 is used instead of the locking member 22. Then, the turning operation of the set screw 17 was troublesome.

[0005] In particular, since the pressure contact projection 25 of the leaf spring portion 24 is merely pressed against the guide portion 3,
During use, there is a possibility that the guide unit 3 may be inadvertently moved with respect to the grip unit 2.

An object of the present invention is to improve the fourth embodiment and to lock the blade housing portion more securely with the grip portion.

[0007]

The present invention will be described with reference to the reference numerals in the drawings (FIGS. 1 to 5) of the following embodiments. The cutter knife according to the present invention is configured as follows.

A holder (1) comprising a grip (2) and a blade housing (3) fitted in the grip (2) is provided in a holder (1). 19) is supported so as to be able to protrude and retract from the front end opening (15a) of the blade housing portion (3). The entire length (L) between the front and rear ends of the holder (1) can be changed by supporting the blade body storage part (3) movably in the front-rear direction along the blade body retracting direction (A) with respect to the grip part (2). And holding means (K) for holding the blade body storage section (3) with respect to the grip section (2).

The holding means (K) has the following configuration. A plurality of locking portions (16,
17) are arranged side by side in the blade body retracting direction (A). The operation unit (20) is movably supported with respect to the grip unit (2) such that the operation unit (20) can take a lock position (P) and a release position (Q). Between the operating portion (20) and each of the locking portions (16, 17) of the blade housing portion (3), the lock portion (21) is locked to the grip portion (2) by the lock position (P) and the release position ( Q) so as to be movable. A pressing surface (31) for moving the lock portion (21) to the lock position (P) at the lock position (P) of the operation portion (20); and the operation portion (20)
The lock part (21) is released at the release position (Q) at the release position (Q).
And a release surface (29) to be moved to the operation unit (20). A state in which the locking portions (16, 17) of the blade body storage portion (3) are locked to the locking portion (21) in the lock position (P) to lock the blade body storage portion (3), and a release position ( The locking part (1) of the blade body storage part (3) is opposed to the locking part (21) of
6, 17) can be unlocked and the blade body storage section (3) can be unlocked.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A blade body retractable cutter knife according to an embodiment of the present invention will be described below with reference to the drawings.

<Holder 1 shown in FIG. 1> The holder 1 is composed of a holding portion 2 made of plastic and a blade housing portion 3 made of metal. (Grip section 2) The grip section 2 includes a grip section body 4 and a lid 5
Consists of The gripper body 4 includes a back wall 6 and upper and lower side walls 7.
And A guide groove 8 extends in the front-rear direction on the front side of the grip portion main body 4 between the back wall 6 and the upper and lower side walls 7,
The front end opening 8a and the rear end opening 8b of the guide groove 8 are open. A step 9 is formed in the back wall 6 at a position near the front end opening 8 a in the guide groove 8.
A stop hole 10 is formed in the back wall 6 in the guide groove 8 at a position near the rear end opening 8b. As shown in FIG. 2A, the lid 5 is inserted into the guide groove 8 from the rear end opening 8b and overlaps the back wall 6, and in the inserted state, as shown in FIG.
As shown in FIG. 4A and FIG. 4B, the rear end opening 8b is closed while being locked in the stopper hole 10. Back wall 6
A recess 11 is formed between the lid 5 and the step 9. An operation hole 12 penetrates the back wall 6 in the recess 11.

(Blade Housing 3) The blade housing 3 has a back wall 13 and upper and lower side walls 14. This back wall 1
A guide groove 15 extends in the front-rear direction on the front side of the blade body storage portion 3 between the upper and lower side walls 3 and the upper and lower side walls 14, and a front end opening 15a and a rear end opening 15b of the guide groove 15 are opened. As shown in FIG. 2B, a plurality of locking projections 16 (locking portions) are arranged outside the back wall 13 from the vicinity of the rear end opening 15b toward the front end opening 15a. As shown in FIG. 3B, a locking concave portion 17 (locking portion) is provided between each locking convex portion 16.
Are formed.

As shown in FIG. 1, a slider 18 is inserted into a guide groove 15 of the blade housing 3 so as to be movable in the front-rear direction. The blade body 19 is inserted into the guide groove 15 so as to be movable in the front-rear direction, and the rear end of the blade body 19 is connected to the slider 18. When the slider 18 is moved, the blade body 19 moves as shown in FIG.
5 emerges from the front end opening 15a.

(The state in which the blade body storage part 3 is fitted into the grip body 4) As shown in FIGS. 3 and 4, the blade body storage part 3 has a rear end opening 8b formed in a guide groove 8 of the grip body 4.
And the back wall 13 of the blade body storage part 3 overlaps with the back wall 6 of the grip body 4, and the upper and lower side walls 14 of the blade body storage part 3 overlap with the upper and lower side walls 7 of the grip body 4. . The guide groove 15 of the blade body storage unit 3 is exposed from the front side of the grip unit body 4 together with the slider 18 and the blade body 19. In this fitted state, the blade body storage part 3 can be moved in the front-rear direction along the blade body protruding and retracting direction A with respect to the grip part main body 4. The front end opening 15a of the blade body storage part 3 is partially closed by the front end opening 8a of the gripper body 4.
Protruding from the side. When the rear end opening 8b of the grip unit main body 4 is closed by the lid 5, the blade body storage unit 3 is closed by the rear end opening 15b.
It does not come off by contacting this lid 5 on the side.

<Holding means K of blade body storage part 3 with respect to gripping part 2> In addition to the locking projections 16 and the locking recesses 17 of the blade body storage part 3, this holding means K is shown in FIG. As shown, a plastic operation unit 20 and a metal lock rod 2 are shown.
1 (lock portion).

(Operation unit 20) The operation unit 20 includes a front support plate 22, a rear support plate 23, a locking plate 24 between the two support plates 22, 23, Lock plate 2
4 and a finger contact portion 25 protruding outside. The operation unit 20 is applied to the recess 11 of the grip unit main body 4 and faces the outside of the back wall 13 of the blade body storage unit 3, and the finger contact unit 25 is exposed from the operation hole 12 in the recess 11. At the same time, the front and rear support plate portions 22 and 23 are supported inside the recess 11. Front and rear support plate portions 22 and 23 facing back wall 13 of blade body storage portion 3
A groove 26 in which the locking projections 16 and the locking recesses 17 of the blade body storage unit 3 are engaged extends in the front-rear direction.

A locking recess 27 is formed inside the locking plate 24 between the front and rear support plates 22 and 23. As shown in FIG. 5, the lock recess 27 has a wall surface 28 (a surface perpendicular to the blade body retracting direction A) that forms a step between the lock recess 27 and the front support plate portion 22. Release surface 29 (surface parallel to blade body emergence direction A)
And a wall surface 30 forming a step between the rear side support plate portion 23 and
(A surface orthogonal to the blade body emergence direction A) and the wall surface 30.
And a pressing surface 31 (surface parallel to the blade body retreating direction A) that is continuous at right angles to the cutting surface 29, and an inclined surface 32 that is continuous between the pressing surface 31 and the release surface 29. The distance of the release surface 29 to each of the locking projections 16 and each of the locking recesses 17 of the blade body housing 3 is larger than the distance of the pressing surface 31.

When a force is applied to the front or the rear by pressing the finger contact portion 25, the operation portion 20 moves along the operation hole 12 of the grip portion main body 4 with a certain degree of frictional resistance, and FIG.
A lock position P shown in FIG. 5A and a release position Q shown in FIG. At the lock position P and the release position Q, the operation unit 20 is held by frictional resistance with the grip unit body 4.

(Lock Bar 21) Stop recesses 33 are formed on both the upper and lower sides (both sides orthogonal to the blade body retracting direction A) of the recess 11 of the gripper body 4 respectively. When the upper and lower ends of the lock bar 21 are inserted into the upper and lower retaining recesses 33, the intermediate portion of the lock bar 21 is
0 is engaged in the lock recess 27. Lock rod 21
Moves only in the vertical direction (the direction perpendicular to the blade body retracting direction A) along the upper and lower retaining recesses 33, and is moved in the front-rear direction (parallel to the blade body retracting direction A) by the regulation of the upper and lower retaining recesses 33. Direction).

In the locked position P of the operation section 20, FIG.
As shown in (a), the wall 30 of the operating portion 20 abuts against the lock rod 21 in the lock recess 27 and the operating portion 20 stops, and the lock bar 21 is pushed by the pressing surface 31 of the lock recess 27. Move to lock position P.

In the release position Q of the operation section 20,
As shown in FIG. 5B, the lock recess 27 of the operation unit 20 is provided.
Then, the wall surface 28 abuts on the lock rod 21 to stop the operation unit 20, and the lock rod 21 faces the release surface 29 of the lock recess 27 so as to be movable from the lock position P to the release position Q.

<How to Change Length L of Holder 1> In the state shown in FIGS. 3 (a) and 3 (b) and FIGS. Length L ₁
5A, and is locked to the gripper body 4 as shown in FIG. In this locked state, the lock bar 21 is forcibly pushed to the lock position P by the pressing surface 31 of the operation unit 20 at the lock position P, and is engaged with the locking recess 17 of the blade body storage unit 3. . In this locked state, even if a force in the front-rear direction (blade body retracting direction A) is applied to the blade body storage section 3, the blade body storage section 3 is moved by being locked by the lock bar 21 by the both locking projections 16. do not do.

When the operating portion 20 is set to the release position Q as shown in FIG. 5B from the locked state, the lock rod 21 faces the release surface 29 of the operation portion 20 and the lock position P and the release position Q are switched. Between the unlocked states that can be freely moved.
When a force in the front-rear direction (blade body retracting direction A) is applied to the blade body storage section 3 in a state where the lock bar 21 is separated from the locking recess 17 of the blade body storage section 3, the blade body storage section 3 moves. Blade body storage part 3
There after changing the overall length L of the holder 1 to arbitrarily change the length L ₁ that protrudes from the grip portion 2, back to the locked state described above.

(Features of the present embodiment)
(Other than the other technical ideas described below). * In the locked state, the blade storage unit 3 is
The locking portions (the locking projections 16 and the locking recesses 17) are securely hooked and locked. Therefore, the blade body storage part 3 is
Can be securely locked.

The operation unit 20 simply moves between the lock position P and the release position Q with respect to the gripper body 4. Therefore, it is not necessary to form a long hole for moving the operation section 20 in the grip section main body 4, and the appearance is improved.

* It is only necessary to switch the operation unit 20 between the lock position P and the release position Q, and this switching operation can be easily performed. * Each locking portion to the blade member housing part 3 (locking projections 16, the engagement recess 17) can be carried out finely the adjustment of the protruding length L ₁ of the blade accommodating portion 3 arranged side by side.

[Other Embodiments] In addition to the above-described embodiments, the present invention may be configured as shown by * below. * In the above-described embodiment, the lock rod 21 as the lock portion has a small-diameter elongated cylindrical shaft. However, as another shape, for example, the lock portion is changed to a spherical shape.

In the above-described embodiment, since the lock rod 21 as the lock portion is free in the loosely-fitted state without any restriction in the unlocked state, it can freely move between the locked position P and the released position Q. I do. Instead of this configuration,
The lock portion is urged to the lock position P or the release position Q by a spring. Further, the lock itself is made a spring.

[Other technical ideas] The technical ideas (other than the claims) that can be grasped from each embodiment are described together with the effects. (B) In claim 1, the lock portion (lock bar 21)
A locking position P, which is supported by a stop portion (stop recess 33) formed on the grip portion 2 and is locked by a lock portion (lock projection 16, lock recess 17) of the blade body housing portion 3; The blade body housing portion 3 is movable between a release position Q where the blade body housing portion 3 is separated from the locking portions (the locking convex portion 16 and the locking concave portion 17) and unlocked.
Therefore, a desired lock mechanism can be realized with a simple structure.

(B) In the above (A), the operation unit 20
The pressing surface 31 forcibly presses the lock portion (lock bar 21) to the lock position P and engages with the locking portion (locking convex portion 16, locking concave portion 17) of the blade body storage portion 3. In addition, the release surface 29 of the operation unit 20 allows the lock unit (the lock bar 21) to move from the lock position P to the release position Q. Therefore, a desired lock mechanism can be realized with a simple structure.

(C) In claim 1 or (a) or (b), the grip portion 2 comprises: a grip portion main body 4 having a guide groove 8 into which the blade body storage portion 3 is movably fitted;
A cover 5 for closing a rear end opening 8b of the guide groove 8 opposite to the front end opening 8a of the guide groove 8 from which the blade body housing portion 3 projects, and a step 9 provided in the guide groove 8; And lid 5
Between the lock position P and the release position Q, an operation hole 12 is formed through the depression 11 and the operation part 20 is supported in the depression 11 between the lock position P and the release position Q. At the same time, the operation unit 20 was exposed from the operation hole 12. Therefore, when the recess 11 is formed in the guide groove 8 of the grip portion main body 4, the grip main body 4 can be easily formed.

[0032]

According to the cutter knife of the present invention, the blade housing portion (3) can be securely locked to the grip portion (2) in the locked state.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a cutter knife according to an embodiment.

FIG. 2A is a perspective view showing a gripping portion of a holder in which a lid is assembled to a gripping portion main body from the state shown in FIG. 1, and an operating portion and a lock rod assembled to the gripping portion, and FIG. FIG. 4 is a perspective view showing a locking portion in a blade body storage portion of the holder.

3A is an assembly perspective view showing the front side of the cutter knife according to the present embodiment, and FIG. 3B is an assembly perspective view showing the back side thereof.

FIG. 4A is a front view showing a cutter knife with a blade body protruding from the state of FIG. 3A, and FIG. 4B is a plan sectional view of the same.

5 (a) is an enlarged sectional view of FIG. 4 (a) showing a locked state, and FIG. 5 (b) is an enlarged sectional view of FIG. 4 (a) from a locked state to an unlocked state.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Holder, 2 ... grip part, 3 ... Blade body storage part, 16 ... Locking convex part (locking part), 17 ... Locking concave part (locking part), 19 ... Blade body, 20 ... Operating part, 21 … Lock bar (lock part), 29
... release surface, 31 ... pressing surface, K ... holding means, P ... lock position, Q ... release position, A ... blade body retracting direction, L ... holder full length.

Claims (1)

(57) [Claims] 1. A holder (1) comprising a grip part (2) and a blade body storage part (3) fitted into the grip part (2), wherein the blade body storage part (3) has a blade. The body (19) is supported so as to be able to protrude and retract from the front end opening (15a) of the blade body housing part (3), and the blade body housing part (3) is along the blade body protruding and retracting direction (A) with respect to the grip part (2). The holder (1) is supported so as to be movable in the front-rear direction so that the total length (L) between the front and rear ends of the holder (1) can be changed, and holding means (K) for holding the blade body storage portion (3) with respect to the grip portion (2) is provided. In the cutter knife, in the holding means (K), a plurality of locking portions (16, 17) are provided in parallel with the blade body storage section (3) in the blade body retracting direction (A), (2) The operation unit (20) is locked at the lock position (P).
And a release position (Q) so as to be movable. The operation unit (20) and each of the locking portions (1) of the blade body storage portion (3) are supported.
6, 17) and the lock portion (2) with respect to the grip portion (2).
1) is movably supported so as to take a lock position (P) and a release position (Q), and a lock portion (21) is provided at a lock position (P) of the operation portion (20).
A pressing surface (31) for moving the lock portion (P) to the lock position (P) and a release surface (29) for moving the lock portion (21) to the release position (Q) at the release position (Q) of the operation portion (20). The locking portion (20) is provided to lock the blade storing portion (3) by locking the locking portions (16, 17) of the blade storing portion (3) with the locking portion (21) at the locking position (P). And unlocking of the blade body storage part (3) by unlocking the locking parts (16, 17) of the blade body storage part (3) with the lock part (21) of the release position (Q). The holder structure in the blade body retractable cutter knife, characterized in that it can take a state.