JP2003164678A - Blade changeable cutter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a blade changeable cutter suitable for precision cutting which can deliver blades simply by pressing a press button like mechanical pencils while holding the edge part of the blade on a cover body firmly without chattering. <P>SOLUTION: The cutter comprises a flat blade 1 with feeding holes 1b, arranged at a specified pitch along the length thereof, a slide member 2 adapted to feed the blade 1 forward by one pitch each and a holder 4 which detachably holds the blade 1 and is fixed on a cover body 3 retaining the slide member 2 keeping the blade 1 enveloped therein. The slide member 2 is provided with a feeding pawl 2a which is made to elastically engage any one of the feeding holes 1b of the blade 1 and an elastic press body 2b elastically fitted into any one of the feeding holes 1b while the push button 2c is formed at the rear end thereof being exposed to the outside of the cover body. This achieves a simple delivery of the blade by depressing the push button 2c. <P>COPYRIGHT: (C)2003,JPO

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 cutter knife which is fed out by one pitch to cut and remove a used portion of a tip.

[0002]

2. Description of the Related Art Conventionally, this type of replaceable-blade type cutter knife has a flat blade slidably inserted into an elongated cover body, and a feeding knob connected to the blade is provided in front of a feeding knob provided on a side surface of the cover body. The blade is formed so as to be extended by moving it. Then, in order to lock the blade at the time of use, a spring plate is provided on the feeding knob so as to strongly engage with the sawtooth groove provided on the cover body, or the locking knob is attached to the feeding knob to operate the locking knob. Therefore, the means for locking is widely adopted.

However, in the former locking method using a spring plate, when the spring force is increased, the feeding knob becomes hard to slide and becomes difficult to operate. On the contrary, when the spring force is weakened, the locking effect is lost and the blade moves during use. There were contradictory problems such as. Further, in the latter cutter knife using the lock knob, the feeding knob provided on the side surface of the cover body has to be moved while pressing it with the fingertip together with the lock knob, which is disadvantageous in that the operation is troublesome. Also, with this type of conventional cutter knife,
Since it is formed so that the blade can be taken in and out from the payout opening provided at the tip of the cover body, in order to smoothly take the blade in and out, an allowance gap is required between the blade and the payout opening, and therefore the paid-out blade tip portion. Had some rattling and was not suitable for precision cutting.

[0004]

SUMMARY OF THE INVENTION Therefore, the present invention is a new type of blade which allows the blade to be easily extended by pushing a push button provided at the rear end of the cover body like a mechanical pencil. The main purpose is to provide a type cutter knife.

Still another object of the present invention is to provide a replaceable blade type cutter knife suitable for precision cutting, because the blade tip portion of the unrolled blade is held against the cover body without rattling. is there.

[0006]

In order to achieve the above object, the present invention takes the following technical means. That is, in the cutter knife according to the present invention, a flat plate-shaped blade 1 having feed holes 1b at a predetermined pitch along the length direction, and a slide member 2 that feeds the blade 1 forward one pitch at a time. And a holder 4 fixed to a cover body 3 in a state where the blade 1 is detachably held and the slide member 2 is held together with the blade 1.

The slide member 2 has a feed claw 2a elastically engaged with any one of the feed holes 1b of the blade 1 and an elastic pressing member 2b elastically fitted with any one of the feed holes 1b. And a push button 2c that is exposed to the outside of the cover body is formed at the rear end, and the slide member 2 is formed so as to be movable back and forth by an integral pitch of the feed hole 1b of the blade 1 and is always forced to the retracted position by the spring 5. Is held. The feed pawl 2a engages with the feed hole 1b of the blade 1 only when the slide member 2 is in the retracted position and moves forward from the retracted position, and engages with the feed hole 1b at a position advanced by an integer pitch. Is formed so as to come off. Therefore, by pushing the push button 2c like a mechanical pencil, the blade 1 can be easily extended by one pitch together with the slide member 2, and the blade 1 is pushed into the holder 4 while the slide member 2 is pushed. be able to.

Folding pieces 4a, 4a are provided on the upper and lower sides of the holder 4 and are slightly inclined outward, and the folding pieces 4 are provided.
The upper and lower grooves 4b, 4b are formed by a, and the blade 1 and the slide member 2 are bound and held in the upper and lower grooves 4b, 4b. Further, bulging portions 2d, 2d are provided on the upper and lower edges of the tip of the slide member 2, and the bulging portion 2d is recessed into the groove 4b when the slide member 2 is retracted and extends along the inclined surface of the folding piece 4a. It is preferable that the blade 1 is formed so as to be forced in a direction in which the blade 1 is closely attached. This allows the blade 1
It is possible to surely prevent the rattling of the blade at the time of feeding.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Each of the feed holes 1 is formed in the blade 1.
The cutting line 1a may be formed corresponding to b or corresponding to the plurality of feed holes 1b. The elastic pressing body 2b includes a ball 2e and the ball 2e.
May be formed by a spring plate 2f that elastically presses toward the blade 1, or may be formed only by a spring plate 2g having a protrusion as shown in FIG.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 6 show a typical embodiment of a replaceable blade type cutter knife according to the present invention, in which a cutting line 1a ... And a feed hole 1b are formed at a predetermined pitch along the length direction. A flat plate-shaped blade 1 including: and a slide member 2 that sends the blade 1 forward by one pitch,
The blade 1 is detachably held and the holder 4 is fixed to the cover body 3 while holding the blade 1 together with the slide member 2.

The slide member 2 has a feed pawl 2a which elastically engages with any one of the feed holes 1b of the blade 1,
An elastic pressing body 2b elastically fitted to any one of the feed holes 1b is provided, and a push button 2c exposed to the outside of the cover body is formed at the rear end. The elastic pressing body 2b is formed by a ball 2e and a spring plate 2f that elastically presses the ball 2e toward the blade 1.
The ball 2e is fitted in the hole 7a of the ball stay 7 which is fitted and held in the cutout portion 4c of the holder 4, whereby movement in the front-rear direction is prevented. In the present embodiment, the spring plate 2f is made of an elastic plate material different from the slide member 2, but the spring plate 2f can be formed integrally with the slide member 2. Further, the cutting lines 1a formed on the blade 1 are not limited to the intermediate portions of the feed holes 1b, but may be formed on portions passing through the feed holes 1b, and may correspond to the plurality of feed holes 1b. For example, it may be implemented by forming one cutting line 1a in two feed holes 1b.

Further, the slide member 2 is formed so as to be movable in the front-rear direction by one pitch of the feed holes 1b of the blade 1, and is constantly held by the spring 5 in the retracted position. As shown in FIG. 3, the feed claw 2a of the slide member 2 engages with the feed hole 1b of the blade 1 only when the slide member 2 is in the retracted position and moves forward from the retracted position, and the feed claw 2a of FIG. It is formed so as to be disengaged from the feed hole 1b at a position advanced by the pitch. Therefore, when the slide member 2 is pushed through the push button 2c, the feed claw 2a engages the feed hole 1b of the blade 1 to feed the blade 1 forward, and when the push operation is released, the slide member 2 returns to the original state of FIG. Return to position.
Further, when the slide member 2 is pushed, the feed claw 2a
And the feed hole 1b are disengaged, and at the same time, the ball 2e can be released from the hole 1b of the blade as shown in FIG. 4, so that the blade 1 can be pushed into the holder 4 or taken out.

Folding pieces 4a, 4a slightly inclined outward are provided on the upper and lower sides of the holder 4, and the folding pieces 4a form upper and lower grooves 4b, 4b. The blade 1 and the slide member 2 are held in a state of being overlapped with each other in the upper and lower grooves 4b, 4b. Further, bulging portions 2d, 2 are formed on upper and lower edges of the tip of the slide member 2.
d is provided, and the bulging portion 2d is formed so as to be retracted into the groove 4b when the slide member 2 is retracted and is forced in the direction in which the blade 1 is closely attached along the inclined surface of the folding piece 4a. .

In this embodiment, as shown in FIGS. 1 and 2, a protector 6 for covering the blade at the tip of the blade 1 when not in use is provided on the cover body 3 so that it can be freely taken in and out. The blade at the tip portion of the blade 1 is formed to be exposed by retracting. Reference numeral 2h is a fitting groove for cutting the blade 1 of another cutter knife from the cutting line 1a, and 2i is a spring receiving piece for receiving one end of the spring 5.

With the cutter knife constructed as described above, the blade 1 can be easily sent forward together with the slide member 2 by one pitch by pushing the push button 2c. When the pushing force is released, only the slide member 2 returns to its original position by the spring 5. At the same time, the bulging portions 2d, 2d provided on the upper and lower edges of the tip of the slide member 2 are forced into the groove 4b so as to come into close contact with the blade 1 along the inclined surface of the folding piece 4a. The blade 1 is stably held by the holder 4 fixed to the cover body 3 without rattling due to the forcing force and the pressing force of the elastic pressing body 2b against the blade, and the blurring of the cutting edge during cutting can be reliably prevented. Also blade 1
When it is desired to retreat or replace the blade, the blade 1 may be pushed in while the slide member 2 is pushed.

In the present invention, as shown in FIG. 7, the elastic pressing body 2b is formed only by the spring plate 2g having the projection fitted into the feed hole 1b of the blade 1 and shown in the previous embodiment. Alternatively, the ball 2e may be omitted.

Although the representative embodiments of the present invention have been described above, the present invention is not necessarily limited to the structures of the above-mentioned embodiments, and is within the scope of having the constituent features of the present invention and being effective. Of course, it can be implemented by appropriately changing it.

[0018]

Since the replaceable blade type cutter knife of the present invention is constructed as described above, the blade can be easily forwarded by the required length by pushing the push button like a mechanical pencil. Also, the blade can be pushed inside while being pushed. The forward feeding state and the inward pushing state can be stably held by the pressing force of the elastic pressing body against the blade.

In particular, with the structure of claim 2,
When the slide member is retracted, the bulging portions provided at the upper and lower edges of the tip of the slide member are sunk into the groove of the holder and are forced in the direction in which they are in close contact with the blade along the inclined surface of the folded piece. Due to the pressing force applied to the blade by the elastic pressing body, the blade is stably held in the holder fixed to the cover body without rattling, and there is an effect that it is possible to reliably prevent the blade tip from shaking during cutting.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of a cutter knife according to the present invention.

FIG. 2 is a side view of the cutter knife with a side cover body removed.

3 is a cross-sectional view taken along the line AA in FIG.

FIG. 4 is a sectional view similar to FIG. 3, showing a state in which a slide member is pushed.

5 is a cross-sectional view taken along the line BB in FIG.

FIG. 6 is a perspective view of a slide member and a holder portion.

FIG. 7 is a cross-sectional view showing another embodiment of the elastic pressing body.

[Explanation of symbols]

1 blade 1a cutting line 1b sprouting hole 2 Slide member 2a Feeding claw 2b Elastic pressing body 2c push button 2d bulge 2e ball 2f spring plate 2g spring plate 3 cover body 4 holder 4a Folded piece 4b groove 5 springs

Claims (4)

[Claims] 1. A feed hole at a predetermined pitch along a length direction.
(1b) ... a flat plate-shaped blade (1), and the blade (1)
A slide member (2) for sending forward by one pitch, and the cover body (3) in a state where the blade (1) is detachably held and the slide member (2) is held together with the blade (1). The slide member (2) is composed of a fixed holder (4), the slide member (2) is elastically engaged with any one of the feed holes (1b) of the blade (1), and the feed hole (2a) and the feed hole ( A push button (2c) having an elastic pressing body (2b) elastically fitted to any one of 1b) and exposed to the outside of the cover body at the rear end is formed, and the slide member (2) is a blade. A constant spring that can move forward and backward by an integral number of pitches in the feed hole (1b) in (1)
(5) is forcibly held in the retracted position by the
(2a) engages the feed hole (1b) of the blade (1) only when the slide member (2) is in the retracted position and moves forward from the retracted position, and the feed hole is in a position advanced by an integer pitch. A replaceable blade type cutter knife formed so as to be disengaged from (1b). 2. The holder (4) has turn-up pieces (4a), (4a) which are slightly inclined outward toward the top and bottom, and upper and lower grooves (4b) formed by the turn-up pieces (4a). ), (4b), the blade (1) and the slide member (2) are held together, and swelling portions (2d), (2d) are provided on the upper and lower edges of the tip of the slide member (2). The bulging portion (2d) is retracted into the groove (4b) when the slide member (2) is retracted and the folded piece (4d
The replaceable blade type cutter knife according to claim 1, which is formed so as to be forced in a direction in which the blade (1) is in close contact with the inclined surface of (a). 3. The elastic pressing body (2b) comprises a ball (2e) and a spring plate (2f) that elastically presses the ball toward the blade (1), and the ball (2e) is a ball stay (7). The cutter blade according to claim 1 or 2, wherein movement thereof in the front-rear direction is prevented by). 4. The elastic plate (2b) according to claim 1 or 2, wherein the elastic plate (2b) is formed by a spring plate (2g) having a protrusion that fits into the feed hole (1b) of the blade (1). Spare blade type cutter knife.