JPS596672B2 - cutter knife - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention comprises a holder, a blade body that moves in the longitudinal direction within a holder guide, and a sliding body coupled to the blade body, and the blade body and the sliding body are always moved rearward. This invention relates to a cutter knife that has a return mechanism for pulling it back.

A cutter knife is a very useful tool for cutting work, but
When the blade is exposed from its holder, an unexpected accident occurs in which a finger is cut.

Since it is dangerous to leave the blade of a cutter knife exposed from the holder, it is desirable to have a mechanism for easily returning the blade to the holder when the work is finished.

However, it is also dangerous if the return mechanism causes the blade to return unexpectedly into the holder.

Therefore, the purpose of the present invention is to provide a cutter knife that is safe both during and after work.

Next, the structure of the present invention will be explained with reference to the drawings showing examples.

The present invention relates to a cutter knife comprising a cutter knife holder, a blade body, a sliding body, and a coil spring.

The holder consists of a holder body 1 and a holder outer cover 2. The holder body 1 is provided with a blade guide 3-, a sliding body guide 4, a coil spring actuating groove 5, and a coil spring locking protrusion 6. A long hole 1 is provided on the side surface of the outer cover 2.

The blade guide 3, the sliding body guide 4, and the elongated hole γ of the holder body 2 of the holder main body 1 allow the blade 8 and the sliding body 9 connected to the blade 8 to be oriented in the longitudinal direction with respect to the holder. It is set up to move.

The sliding body 9 is connected to the holder main body 1 by engaging the rear end of a coil spring 10 coupled to the rear end of the sliding body 9 with a locking protrusion 6 provided on the holder main body 1. are doing.

This forms a return mechanism, whereby the sliding body 9 and the blade body 8 coupled to the sliding body 9 are constantly pulled back.

The sliding body 9 consists of a sliding body base 11 and a sliding body operating part 13, and by fitting a fitting hole 12 provided in the sliding body base 11 and a fitting protrusion 14 provided in the sliding body operating part 13, It is formed.

When forming the sliding body 9, the engagement protrusion 15 provided on the sliding body base 11 fits into the hole 16 of the blade 8, so that the blade 8 is coupled to the sliding body 9.

A slit is provided in the sliding body operating portion 13 outside the fitting protrusion 14 from the rear end of the operating portion 13 toward the front,
A locking convex portion 18 is provided at the lower end of the operating portion 13 .

A finger rest 19 is provided between the slit and the locking protrusion 18 for moving the locking protrusion 18 in the same plane as the blade and substantially perpendicular to the longitudinal direction of the blade. It stands out.

That is, when the finger rest 19 is pushed upward, the operation section 1
3, the inner part of the slit 1γ is narrow, so that this part is bent, and as a result, the locking convex portion 18 moves upward.

A locking concave portion is provided at the lower part of the elongated hole portion 7 of the holder outer cover 2 to engage with a locking convex portion 18 provided on the slide body operating portion 13 to fix the slide body 9 at a fixed position. Two pieces of 20 are provided.

Since the present invention has the above configuration, when the cutter knife is used, that is, when the blade body is exposed, the locking convex portion 18 of the sliding body operating portion 13 is connected to the holder outer cover 2.
The sliding body 9 and the blade 8 are fixed by engaging with the engagement recess 20 provided in the blade.

In conventional cutter knives of this type having a return mechanism, engagement of the sliding body is achieved by applying force to the sliding body in a direction perpendicular to the plane of the blade.

With this structure, when the cutter knife is normally used, the holder is held by hand, which applies force to the sliding body in a direction perpendicular to the plane of the blade, which may cause the blade to return unexpectedly during operation. there were.

In contrast, in the present invention, the sliding body 9 and the holder are engaged and disengaged by applying force to the sliding body operating portion 13 in a direction substantially perpendicular to the longitudinal direction of the blade within the same plane as the blade.
Even if the holder is held by hand during work, no force is applied to disengage the sliding body 9 from the holder, and the blade body does not return unexpectedly.

Therefore, it has the effect of being safe to use.

Furthermore, when the work is finished, by pushing up the finger rest 19 provided on the sliding body operation part 13, the locking convex part 18 moves upward and the locking state is released, and the blade is returned to the holder by the return mechanism. It is easy to handle because it returns immediately.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which FIG. 1 is a perspective view of a cutter knife holder main body, FIG. 2 is a perspective view of the holder outer cover, and FIG. 3 is a perspective view of the base of the sliding body. Fig. 4 is a perspective view of the blade body, Fig. 5 is a perspective view of the sliding body operation section, and Fig. 6 is a perspective view of the blade body.
The figure is a perspective view of the finished product with the blade exposed. DESCRIPTION OF SYMBOLS 1... Holder main body, 2... Holder outer cover, 3... Blade guide, 1... Elongated hole, 8... ...Blade body, 9...Sliding body, 1
DESCRIPTION OF SYMBOLS 1...Sliding body base, 13...Sliding body operation part, 1γ...Slit, 18...Engagement convex part, 19... - Finger rest part, 20...Latching recessed part.

Claims (1)

[Claims] 1. Consisting of a holder, a blade body that moves in the longitudinal direction within the holder guide, and a sliding body coupled to the blade body, and having a return mechanism for constantly pulling back the blade body and sliding body, The sliding body is provided with a finger rest that is movable relative to the sliding body, and between the finger rest and the holder, the sliding body is stopped in the middle of the holder against the return mechanism, and the sliding body is stopped in the middle of the holder. A cutter knife that is provided with a locking means that releases the locking state when the finger rest is moved in the same plane as the blade in a direction substantially perpendicular to the longitudinal direction of the blade. A moving body operating section is fitted into a long hole provided on the side surface of the holder, and the sliding body operating section is provided with a slit from its front end or rear end toward the other end, and the sliding body is provided with a slit. A cutter knife characterized in that a finger rest for pushing the locking means upward is provided in a protruding manner.