JP3013294B2 - scissors - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to scissors.

[0002]

2. Description of the Related Art Conventional scissors are designed to open and close the left and right blades by manual operation, and have the disadvantage that their arms become tired if the cutting operation is performed for a long time. Further, the conventional scissors are unsafe and may be opened when not in use, which is dangerous.

[0003]

SUMMARY OF THE INVENTION Therefore, according to the present invention, the cutting operation is facilitated by automatically opening the left and right blades during use, and the left and right blades can be locked so as not to open when not in use. To provide safe and secure scissors.

[0004]

The above object is achieved by the present invention, that is, the switching dial 4 is rotatably attached to a fulcrum for rotatably connecting the pair of blades 1 and 2 and twisted to the fulcrum. A coil spring 6 is mounted, and one end leg 7 of the torsion coil spring 6 is attached to one blade body 2 and the other end leg 8
Are respectively attached to the switching dial 4, the locking pin 10 is also attached to the switching dial 4 so as to be able to protrude and retract, and a warped plate portion 14 is integrally provided at one end of the flat plate portion 13, and at the tip of the warped plate portion 14. Locking plate 1 provided with hook pieces 18
2 with respect to the other blade 1, its flat plate portion 13 and warped plate portion 14
Is mounted so that it can swing like a seesaw, and the switching dial 4 is moved to a position where the torsion coil spring 6 elastically deforms on the flat plate portion 13 of the locking plate 12 so as to urge the blade bodies 1 and 2 in the opening direction. When rotated, the locking pin 10
Are provided, and a second locking hole 16 with which the locking pin 10 is engaged when the switching dial 4 is returned to a position where the elastic deformation of the torsion coil spring 6 is eliminated. At the same time, the switching dial 4 is provided on the warped plate portion 14 of the locking plate 12.
A third locking hole 17 with which the locking pin 10 is engaged when the blade is rotated by a required angle in the opposite direction is provided.
When the locking pin 10 is engaged with the third locking hole 17 as described above, the locking plate 12 is closed.
The lock holes 20 and 21 for inserting the above-mentioned hook pieces 18 are provided by changing the warped plate portion 14 from the floating state by being pressed by the locking pin 10 to the blade body 1. Can be achieved with scissors.

[0005]

Embodiments of the present invention will be described below with reference to the drawings. First, FIGS. 1 to 4 show a pair of left and right blades 1 by manual operation.
2 shows a state in which it is opened. Blades 1 and 2 are spindles 3
The switching dial 4 is rotatably mounted on the support shaft 3. The blades 1 and 2 are integrated with grips 27 and 28, respectively. The switching dial 4 is located outside the blade body 1, and a concave portion 5 into which the inner surface side of the switching dial 4 is fitted on the outer surface side of the blade body 1.
Is provided. A torsion coil spring 6 is mounted around the support shaft 3, one end leg 8 of the torsion coil spring 6 is assembled to the switching dial 4, and the other end leg 7 is passed through a through hole 9 formed in the blade body 1. It is assembled to the other blade 2. On the inner surface side of the switching dial 4, a locking pin 10 is attached at a position slightly away from the support shaft 3. The locking pin 10 is urged by a coil spring 11 so that the tip end thereof can be freely retracted. In addition, a locking plate 12 as shown in FIG. 5 is mounted in the recess 5 of the blade body 1 at a position facing the locking pin 10. This locking plate 12 is provided with a warped plate portion 14 integrally at one end of the flat plate portion 13,
The locking hole 15 and the second locking hole 16 are provided, and the third locking hole 17 is provided in the warped plate portion 14. Further, a hook piece 18 is provided at the tip of the warped plate portion 14. The locking plate 12 is supported by inserting a claw piece 19 provided at an edge of a boundary position between the flat plate portion 13 and the warped plate portion 14 into a hole 26 of the blade body 1, and the flat plate portion 13 and the warped plate portion 14 are supported. Are swingable with each other like a seesaw. The switching dial 4 is
The locking pin 10 is located at a position just engaged with the second locking hole 16 in the flat plate portion 13 of the locking plate 12, and at this time, as shown in FIG. The position display point 23 coincides with the switching alignment point 22 marked on the blade 1. At this time, the torsion coil spring 6 has not been elastically deformed. FIG.
As shown in FIG.
, And is in close contact with the blade body 1, but the warped plate portion 14 is raised from the blade body 1, and the hook piece 18 is inserted into a lock hole 20 of one blade body 1 described later, while Is not inserted into the lock hole 21 of the blade body 2.

Next, FIGS. 6 and 7 show a state in which the blade bodies 1 and 2 are automatically opened. That is, the switching dial 4 is rotated in a direction in which the torsion coil spring 6 is elastically deformed, and the automatic position display point 24 marked on the surface of the switching dial 4 is made to coincide with the switching position alignment point 22 described above. At this time, the locking pin 10 is
In the first locking hole 15. In this state,
As shown in FIG. 7, the left and right blades 1 and 2 are urged by the torsion coil spring 6 to automatically open apart from each other.

Next, FIGS. 8 and 9 show a state in which the blades 1 and 2 are closed and locked so as not to open. That is, the switching dial 4 is rotated in the reverse direction to eliminate the elastic deformation of the torsion coil spring 6, and the locking pin 10 engages with the third locking hole 17 provided in the warped plate portion 14 of the locking plate 12. The switching dial 4 is rotated until they match. At this time, the lock position display point 25 marked on the switching dial 4 coincides with the switching position alignment point 22 described above. In this manner, when the locking pin 10 is engaged with the third locking hole 17,
As shown in FIG. 9, the warped plate portion 1 which has been
4 is pressed by the locking pin 10 and is brought into close contact with the blade body 1,
The hook pieces 18 are inserted into both of the lock holes 20 and 21 provided respectively in the two. The lock holes 20 and 21 are located so as to communicate with each other when both blades 1 and 2 are closed. In this state, the closed state of the blades 1 and 2 is locked, and the blades 1 and 2 do not unintentionally open.

[0008]

The scissors of the present invention are as described above, and the left and right blades 1 and 2 can be automatically opened using the torsion coil spring 6, so that the user can grip the blades 1 and 2. Parts 27, 2
It is only necessary to close 8, operation becomes easy, there is an advantage that the fatigue of the arm can be reduced even if the cutting operation is performed for a long time, and the cutting operation can be speeded up. Also, the opening of the blades 1 and 2 is changed from automatic to manual,
On the other hand, since it is possible to freely switch from manual to automatic, there is the convenience that the user can use properly according to the situation. In addition, since the switching can be performed by rotating the switching dial 4, the operation is easy to understand and simple. Also,
With the blades 1 and 2 closed, the hook piece 18 is
Since the lock can be achieved by inserting the blades 0 and 21 into each other, it is possible to prevent unintended opening of the blades 1 and 2 when not in use, which is safe. Further, since the means for locking the switching dial 4 and the means for locking the blades 1 and 2 in the closed state are provided in one part called the locking plate 12, the number of parts does not increase and the structure is complicated. And there is an advantage that it can be manufactured at low cost.

[Brief description of the drawings]

FIG. 1 is a front view of a state in which a blade body is closed when the blade body is manually opened.

FIG. 2 is a sectional view showing an internal structure of a switching dial when a blade body is manually opened.

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

FIG. 4 is a cross-sectional view of a main part in a state where a locking pin is engaged with a second locking hole of a locking plate.

FIG. 5 is an enlarged perspective view of a locking plate.

FIG. 6 is a sectional view showing an internal structure of a switching dial when the blade body is automatically opened.

FIG. 7 is a sectional view showing an internal structure of the switching dial in a state where the blade body is opened.

FIG. 8 is a cross-sectional view showing an internal structure of the switching dial when the closed state of the blade body is locked.

FIG. 9 is a sectional view of a main part when the closed state of the blade body is locked.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Blade body 2 Blade body 3 Support shaft 4 Switching dial 5 Depression 6 Torsion coil spring 7 Leg 8 Leg 9 Through hole 10 Lock pin 11 Coil spring 12 Lock plate 13 Flat plate 14 Warp plate 15 First lock hole 16 Second Locking Hole 17 Third Locking Hole 18 Hook Piece 19 Claw Piece 20 Lock Hole 21 Lock Hole 22 Switching Position Adjustment Point 23 Manual Position Display Point 24 Automatic Position Display Point 25 Lock Position Display Point 26 Hole 27 Grasping Part 28 Grip part

Claims (1)

(57) [Claims] 1. A switching dial 4 is rotatably mounted on a fulcrum that rotatably connects a pair of blade bodies 1 and 2, and a torsion coil spring 6 is mounted on the fulcrum, and one end leg of the torsion coil spring 6 is provided. Part 7 to one blade body 2 and the other end leg 8
Are respectively attached to the switching dial 4, the locking pin 10 is also attached to the switching dial 4 so as to be able to protrude and retract, and a warped plate portion 14 is integrally provided at one end of the flat plate portion 13, and at the tip of the warped plate portion 14. Locking plate 1 provided with hook pieces 18
2 with respect to the other blade 1, its flat plate portion 13 and warped plate portion 14
Is mounted so that it can swing like a seesaw, and the switching dial 4 is moved to a position where the torsion coil spring 6 elastically deforms on the flat plate portion 13 of the locking plate 12 so as to urge the blade bodies 1 and 2 in the opening direction. When rotated, the locking pin 10
Are provided, and a second locking hole 16 with which the locking pin 10 is engaged when the switching dial 4 is returned to a position where the elastic deformation of the torsion coil spring 6 is eliminated. At the same time, the switching dial 4 is provided on the warped plate portion 14 of the locking plate 12.
A third locking hole 17 with which the locking pin 10 is engaged when the blade is rotated by a required angle in the opposite direction is provided.
When the locking pin 10 is engaged with the third locking hole 17 as described above, the locking plate 12 is closed.
The lock holes 20 and 21 for inserting the above-mentioned hook pieces 18 are provided by changing the warped plate portion 14 from the floating state by being pressed by the locking pin 10 to the blade body 1. scissors.