JP2001293264A - Cutter knife - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cutter knife capable of reversing a tail tap in a proper direction according to a dominant hand for stable holding. SOLUTION: This cutter knife 10 is formed by a handle body 11 extended in the longitudinal direction, a knife edge 12 stored in a passage 20 of the handle body 11, an operating part 13 connected to the rear part of the knife edge 12 to be movable along the passage 20, and the tail tap 13 removably provided on the rear part of the handle body 11. The tail tap 13 has an outline bent in a gentle curve direction to the handle body 11, and is adapted to change the direction of ending according to the direction of the knife edge 12. The bent inner edge of the tail tap 15 is formed as an attitude stable curve part 33, whereby being held, the cutter knife 10 substantially comes into contact with the range from the vicinity of the roots of the thumb and index finger to the back of the hand.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutter knife, and more particularly, to the use of a tail plug that extends in a curved direction, in which case the direction of the tail plug is adjusted to the dominant hand regardless of whether the dominant hand is left or right. The present invention relates to a cutter knife that can be changed and can be stably supported without a risk of erroneous gripping or direction.

[0002]

2. Description of the Related Art Conventionally, a long strip-shaped steel blade has been mounted in a passage formed in a long strip-shaped handle body, and an operating portion mounted at the rear end of the blade has been moved along the passage. Back and forth,
2. Description of the Related Art Cutter knives that allow the blade tip to protrude and retract from the tip of a handle body are known. In order to prevent the operating section from inadvertently falling out of the rear end of the handle main body, the cutter knife is usually provided with a tail plug detachably at the rear end of the handle main body. As this tail plug, there is a type that is gently curved with respect to the linear direction of the handle body.

[0003]

However, the tail plug in the known cutter knife is provided only for the main purpose of preventing the operation section from coming out, and a tail plug of a curved type is used. When used, in the case of a cutter knife that can be used according to the dominant hand by reversing the vertical direction of the blade, when the curved direction of the tail plug can not be changed, the shape alignment with the grip hand can not be obtained Is generated. That is, when the cutter knife is sandwiched between the thumb and the index finger and gripped, there are cases where the tail plug follows the back of the hand and cases where it does not. Therefore, in order to perform a stable cutting operation when the tail plug does not follow the back of the hand, there arises a disadvantage that the cutter knife must be firmly held by increasing the pinching force of the fingertip.

[0004]

SUMMARY OF THE INVENTION The present invention has been devised in view of such inconvenience, and its object is to tail a user in an appropriate direction according to the dominant hand, regardless of whether the user's dominant hand is left or right. It is an object of the present invention to provide a cutter knife that can turn over a stopper and secure a wide support area of the cutter knife when gripping the cutter knife to enable stable holding.

[0005]

In order to achieve the above object, the present invention provides a handle body having a passage formed in a longitudinal direction, and a blade housed in the passage and capable of protruding from a tip of the handle body. And an operating unit connected to the rear part of the blade and movable along the passage, and a tail plug detachably provided at the rear part of the handle main body, so that the blade can be turned upside down. In a cutter knife of a right-handed and left-handed type, the tail plug is located in substantially the same plane as the handle main body, and has an outer shape extending in a gentle curved direction with respect to a direction in which the handle main body extends. The bending direction is provided so as to be changeable in accordance with the direction. With such a configuration, even when the direction of the blade is changed according to the right or left dominant hand, the direction of the curvature can be changed, and when grasping the cutter knife, the direction or direction is changed. The possibility of mistake can be prevented.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, when the handle main body is sandwiched between a thumb and an index finger, the inner edge of the tail plug is substantially in contact with the back of the hand from near the base of the thumb and the index finger. It is preferable to form it as a stability curve. With such a configuration, when the cutter knife is gripped, the fingertip region, the base of the thumb and forefinger, and the base of the hand from the base to the wrist side are supported. Can be pulled and operated in a state where the posture of the camera is extremely stabilized.

It is preferable that a cutout portion is formed on the connecting side of the tail plug with respect to the handle main body so as to receive a rear region of the operation portion. With this configuration, it is possible to secure a long initial blade length even if the operation unit is formed long, and also to secure a sufficient finger contact area on the operation unit to operate the blade when the blade is moved out and out. It is possible to reduce the feeling.

[0008]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a front view of a cutter knife according to this embodiment. In this figure, a cutter knife 10 includes a handle main body 11 elongated in a longitudinal direction (left-right direction), a blade 12 housed in the handle main body 11, and an operation unit 13 connected to a rear portion of the blade 12; A tail plug 15 is provided at the rear of the handle body 11 so as to be detachable.

As shown in FIGS. 2 and 3, the handle main body 11 is provided with a passage 20 having an upper and lower groove width W longer than the width of the blade 12. The handle body 11 has a slit 16 (see FIG. 6) at the tip thereof for allowing the blade 12 to protrude and retract from the tip position (the right end position in FIG. 1), and extends the passage 20 along the longitudinal direction. Are formed, and an outer cover 11B substantially C-shaped so as not to close the open side 20A of the passage 20 and to be located outside the inner member 11A. As shown in FIG. 1, a well-known blade 12 made of a thin steel piece that is long in the left-right direction is housed in the passage 20, and the operating portion 13 is provided in a connection hole 23 provided at a rear portion of the blade 12. Are connected.

The operating portion 13 has a long oval shape in a plan view extending in the left-right direction in FIG. 1, and a convex portion 26 which can be fitted into the connecting hole 23 is provided at a tip end of a connecting piece 25 connected to the left end of the operating portion 13. Have been. The operation section 13 is provided so as to be able to advance or retreat stepwise by a wavy convex section 28 provided on the open side 20A of the inner member 11A. The forward and backward movements of the blade 12 and the operation unit 13 are substantially the same as those of a known cutter knife, and therefore, detailed structure and description are omitted here.

The rear end of the inner member 11A is provided with a length protruding rearward (to the right in FIG. 2) from the rear end of the outer cover 11B by a predetermined amount. The tail plug 15 can be detachably attached to the connection area 29.

As shown in FIGS. 4 and 5, the tail plug 15 is located substantially in the same plane as the handle main body 11, and is curved in a gentle curved direction with respect to the straight line direction in which the handle main body 11 extends. In addition to being provided with a contoured shape, the direction of curvature is provided so as to be changeable according to the direction of the blade 12. That is, the tail plug 15 is formed of a hollow molded product that can be connected in a state where the connection region 29 is fitted inside, and as shown in FIG. An upper wall portion 31 is connected to the upper edge of the side wall portion 30, and an inner edge, that is, a lower wall portion 33 as a posture stability curve portion is connected to the lower edge side of the side wall portion 30. Upper wall 31
The lower wall portion 33 is provided with a contour that gradually curves downward in FIG. 1 toward the rear.

In the tail plug 15, the side wall 3
Notch portions 30A, 30A extending in the lateral direction are respectively formed in the substantially central portions on the front end side of 0, 30. The notch portion 30A can receive the rear half of the operation portion 13, and thereby the operation portion 13 is a horizontal shape, the initial blade 12
Length can be secured sufficiently. In addition, a concave groove 35 is formed in an upper outer surface area of the side wall portions 30 and 30.
Are formed. The concave groove portion 35 not only keeps a good appearance design, but also functions as a non-slip when the cutter knife 10 is used by gripping the tail plug 15 area so as to fit in the palm of the hand. The side wall 3
Substantially circular concave portions 37, 37 are formed on the inner surface side of 0, 30. These concave portions 37, 37 receive a convex portion (not shown) provided in the connection region 29 to stabilize the fitted state. It is configured to keep it.

In the above configuration, for example, when a right-handed person uses the cutter knife 10, as shown in FIG. 6, the handle main body 11 is sandwiched between the thumb and the index finger, and the handle main body 11 is used. The periphery of the connection between the tail plug 15 and the tail plug 15 can be brought into contact with the base of the finger, and the lower wall portion 33 of the tail plug 15 can be gripped and used so as to substantially contact the back of the hand. This makes it possible to secure a long area for supporting the cutter knife 10. In particular, the cutter knife 10
When the pulling operation is performed, a reaction force is generated in which the cutting edge tries to rotate upward with a portion sandwiched between the thumb and the index finger as a fulcrum, and the lower wall portion 33 of the tail plug 15 is firmly adhered to the back of the hand by this half force. So that
The cutter knife 10 can be kept in a very stable posture.

On the other hand, the left-handed person
When using 0, the tail plug 15 is removed, and the blade 12 and the operation unit 13 are pulled out from the rear end of the handle main body 11. Then, after the blade 12 is turned upside down and the operation unit 13 is set again, the tail plug 15 may be turned over and attached to the rear part of the handle body 11. As a result, as shown in FIGS. 7 and 8, the cutter knife 10 can be used in exactly the same manner as when a right-handed person uses it.

Also, since the direction of the tail plug 15 can be reversed, even when using the cutter knife 10 by holding the tail plug 15 area so as to fit in the palm, the contour becomes familiar to the palm. It can also maintain good usability.

It should be noted that the tail plug 15 in the present invention is not limited to the illustration and the configuration example, and the shape of other portions is changed as long as the lower wall portion 33 can function as a posture stability curved portion. It is possible. The design of the handle main body 11 can be changed as needed if the tail plug 15 is made detachable. Further, in the above embodiment,
Inner member 11A and outer cover 11 constituting handle body 11
Although B is illustrated and described as being separate from each other, these may be configured as an integrally molded product.

[0019]

As described above, according to the present invention,
A tail plug having an outer shape extending in a gentle bending direction with respect to the direction in which the handle body extends is provided, and the configuration in which the bending direction of the tail plug is provided so as to be changeable according to the direction of the blade is adopted. Even if you change the direction of the blade according to your dominant hand,
The direction of the curvature can be changed. Therefore, when grasping the cutter knife, it is possible to prevent a possibility that the direction or the direction is wrong.

Further, since the inner edge of the tail plug is formed as a posture stabilization curved portion that is substantially in contact with the back of the hand, the posture when the cutter knife is gripped can be extremely stabilized.

Further, according to the configuration in which the notch portion capable of receiving the rear region of the operation portion is formed on the connection side of the tail plug, a long initial blade length can be secured even if the operation portion is formed long.
In addition, a sufficient finger contact area for the operation unit can be ensured, and the operational feeling can be reduced.

[Brief description of the drawings]

FIG. 1 is a front view of a cutter knife with a tail plug in a right-handed position.

FIG. 2 is an exploded view of FIG. 1 omitting a blade and an operation unit.

FIG. 3 is an enlarged cross-sectional view taken along line AA of FIG. 2;

4A is an enlarged left side view of the tail plug, and FIG. 4B is an enlarged front view of the tail plug.

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

FIG. 6 is a schematic perspective view showing a state where a right-handed person uses the cutter knife.

FIG. 7 is a front view of the cutter knife with the tail plug in a left-handed position.

FIG. 8 is a schematic perspective view showing a use state of the cutter knife of FIG. 7;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Cutter knife 11 Handle main body 12 Blade 13 Operation part 15 Tail plug 20 Passage 30A Notch part 33 Lower wall part (posture stability curve part)

Claims (3)

[Claims] 1. A handle body having a passage formed in a longitudinal direction, a blade housed in the passage and protrudable from a tip of the handle body, and connected to a rear portion of the blade and along the passage. And a tail plug detachably provided at a rear portion of the handle main body, the cutter knife being a right-handed and left-handed dual-purpose type capable of reversing the vertical direction of the blade, Has an outer shape which is located in substantially the same plane as the handle main body and which is curved in a gentle curved direction with respect to the extending direction of the handle main body, and is provided so that the direction of the curve can be changed according to the direction of the blade. A cutter knife characterized by being. 2. The curved inner edge of the tail plug serves as a posture stability curve portion that substantially contacts the back side of the hand from near the base of the thumb and the index finger when the handle body is sandwiched between the thumb and the index finger and gripped. The cutter knife according to claim 1, wherein the cutter knife is formed. 3. A connection side of the tail plug with respect to the handle body,
The cutter knife according to claim 1, wherein a notch portion that can receive a rear region of the operation portion is formed.