JP2519133Y2 - Locking structure between scissors and sheath - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a locking structure for preventing the blade of the scissors from falling off when the blade is housed in a sheath.

[0002]

2. Description of the Related Art Conventional scissors with a sheath include those shown in Japanese Utility Model Publication No. 62-58696 and Japanese Utility Model Publication No. 64-8386. In any of the scissors with a sheath, a leaf spring portion is formed by cutting in the sheath in the vicinity of the blade insertion / extraction opening, and the opening / closing center shaft portion is locked to the leaf spring portion when both blades are stored.

[0003]

However, in such a conventional locking structure, there is a drawback that the entire end surface of the head of the opening / closing central shaft portion protruding to the outside of the blade can be seen from the outside of the sheath.
As a result, not only does it look bad, but it is also possible that the scissors fall out of the sheath by inadvertently touching the head of the open / close center shaft with a finger.

Further, since the leaf spring portion is locked to the peripheral surface of the head portion of the opening / closing center shaft portion, the leaf spring portion is opened / closed by the force of pulling out both blades from the sheath so that the leaf spring portion is orthogonal to the blade insertion / removal direction. There is a drawback that the head portion and the leaf spring portion are easily disengaged by bending in a direction orthogonal to the rotation center of the portion.

The present invention has a structure in which the opening / closing center shaft of the scissors is locked by the leaf spring portion of the sheath, and the end surface of the head of the opening / closing center shaft portion of the leaf spring portion is almost hidden from the outside of the sheath. The first purpose is to improve the forming structure to improve the appearance and prevent accidental slipping of the scissors.

A second object of the present invention is to lock the end surface of the head portion of the opening / closing center shaft portion to the leaf spring portion so that the lock is not easily released.

[0007]

As shown in the drawings of the embodiments described below, in scissors 1, a pair of blades 2 are rotatably supported by an opening / closing center shaft portion 3. Both blades 2 of the scissors 1 are housed in the sheath 14 through the blade insertion / extraction opening 15.

A leaf spring portion 18 is formed on the sheath 14. The leaf spring portion 18 has elasticity in a direction along the rotation center 3a of the opening / closing center shaft portion 3 which is substantially orthogonal to the blade insertion / removal direction A. On the inner surface of the leaf spring portion 18, a locking projection 19,
20 are formed.

Locking recesses 12 and 13 are formed on an end surface 8a of a head 8 of an opening / closing center shaft portion 3 projecting outward of the blade 2. When the blades 2 are inserted into or removed from the sheath 14 through the blade insertion / extraction opening 15, the engaging recesses 12 and 13 of the head portion 8 and the engaging protrusions 19 and 20 of the leaf spring portion 18 form the leaf spring portion 18. Due to the elasticity of, they can be disengaged from each other.

In this stored state, the head portion 8 of the opening / closing center shaft portion 3
The end surface 8 a of the is covered with the leaf spring portion 18.

[0011]

When both blades 2 of the scissors 1 are inserted into the sheath 14 through the insertion / removal opening 15, the leaf spring portion 18 is pushed by the head portion 8 of the opening / closing center shaft portion 3 and is set at the rotation center 3a of the opening / closing center shaft portion 3. Bends in the direction of resistance against elasticity. After that, as shown in FIGS. 4 and 5, the leaf spring portion 18 is returned by its elasticity, and the locking projections 19 and 20 of the leaf spring portion 18 are engaged with the locking recesses 12 and 13 of the head portion 8. .

In this way, when both blades 2 of the scissors 1 are housed in the sheath 14, the end surface 8 of the head 8 of the opening / closing center shaft portion 3 is closed.
Substantially the entire a is hidden by the leaf spring portion 18 and is almost invisible from the outside of the sheath 14.

Further, it becomes difficult for the pulling-out force of the scissors 1 to act as the bending force of the leaf spring portion 18.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A scissors with a sheath according to an embodiment of the present invention will be described below with reference to the drawings. As shown in FIG. 1, in the scissors 1, a pair of blades 2 are rotatably supported by an opening / closing center shaft portion 3, a blade portion 2a is provided on the tip side of the coaxial portion 3, and the coaxial portion is provided. A grip ring 4 made of plastic is attached to both support rods 2b extending toward the base end side from 3.

As shown in FIG. 2, the opening / closing center shaft portion 3 is composed of a pair of connecting members 5 and 6 and a set screw 7. Each of the connecting bodies 5 and 6 is composed of a head portion 8 and four leg portions 9 protruding from the inside thereof, and the leg portions 9 are juxtaposed in the circumferential direction of the head portion 8 at equal intervals. Both blades 2 have support holes 10 and 11 respectively.
Are formed. The leg portions 9 of the one coupling body 5 are rotatably inserted into the one support hole 10, and the leg portions 9 of the other coupling body 6 are integrally rotated in the other support hole 11. The leg portions 9 of both the connecting bodies 5 and 6 are engaged with each other and are coupled so as to be integrally rotatable. In this combined state, the heads 8 of both connecting bodies 5 and 6 project to the outside of the two blades 2, and the set screw 7 inserted from the head 8 of one connecting body 5 causes the legs of both connecting bodies 5 and 6 to pass. It is screwed to the head portion 8 of the other connecting body 6 through the portions 9. On the end surface 8a of the head portion 8 of the two connecting bodies 5, 6, there are respectively circular locking recesses 12,
13 is formed, and the set screw 7 is exposed at the bottom thereof.

As shown in FIGS. 1, 3, and 5, a blade 14 for inserting and removing a blade is formed in a plastic sheath 14, and U-shaped bulges 16 provided on both sides of the sheath 14 near the slot 15. The notch 17 is formed, and the cantilever-shaped plate spring portion 18 is formed along the notch 17. The leaf springs 18 extend in a direction away from the blade insertion / extraction direction 15 along the blade insertion / removal direction A, and extend in a direction along the rotation center 3a of the opening / closing center shaft 3 orthogonal to the blade insertion / removal direction A. It has the elasticity to bend. On the inner surfaces of the plate spring portions 18, circular locking projections 19 and 20 are formed.

When the blade portions 2a of both blades 2 of the scissors 1 are closed and inserted into the sheath 14 through the insertion / removal opening 15, both leaf spring portions 18 are formed.
Is pushed by both heads 8 of the opening / closing center shaft portion 3 and bends in a direction along the rotation center 3a of the opening / closing center shaft portion 3 against elasticity. After that, as shown in FIGS. 4 and 5, both leaf spring portions 18 return due to their elasticity and the locking projections 19, 20 of the leaf spring portions 18 are returned.
Are engaged in the locking recesses 12 and 13 of both heads 8.

When the blades 2 of the scissors 1 are housed in the sheath 14 in this manner, substantially the entire end surfaces 8a of the heads 8 of the opening / closing central shaft portion 3 are covered by the leaf spring portions 18 and the sheath 1 is closed.
Since it is almost invisible from the outside of 4, the appearance is not only improved, but the user does not carelessly touch both heads 8 and the scissors 1 are less likely to fall out of the sheath 14.

Further, by utilizing both leaf spring portions 18 having elasticity along the rotation center 3a of the opening / closing center shaft portion 3 which is orthogonal to the blade insertion / removal direction A, the locking projections 19 and 20 and the opening / closing center are used. Since the locking recesses 12 and 13 on the end faces 8a of the both heads 8 of the shaft portion 3 are engaged with and disengaged from each other, the pulling-out force of the scissors 1 is less likely to act as the bending force of the leaf spring portion 18, and the user is not comfortable. Even if the scissors 1 are touched in preparation, the scissors 1 are unlikely to fall out of the sheath 14.

When the scissors 1 are pulled out from the sheath 14 with a force of a certain level or more, the leaf spring portion 18 is caused by the head portion 8 of the opening / closing center shaft portion 3.
Is pushed and bent, the locking between the locking concave portions 12 and 13 of the head portion 8 and the locking convex portions 19 and 20 of the leaf spring portion 18 is released, and the blades 2 can be removed from the sheath 7.

In the above-described embodiment, the opening / closing central shaft portions 3 having the heads 8 projecting from the outer sides of the blades 2 have been exemplified, so that the relation between the leaf spring portions 18 on both sides of the sheath 14 and the both heads 8 is shown. Deacted. Although not shown in the drawings, the sheath 14 is provided at the opening / closing center shaft portion whose head protrudes only on the outside of one of the blades.
The leaf spring portion 18 may be provided only on one side.

[0022]

According to the scissors 1 with the sheath 14 according to the present invention, not only the appearance is improved, but also the user does not carelessly touch the head 8 and the scissors 1 may fall out of the sheath 14. Less.

Further, the leaf spring portion 1 having elasticity along the rotation center 3a of the opening / closing center shaft portion 3 orthogonal to the blade insertion / removal direction A.
8, the engaging projections 19 and 20 and the engaging recesses 12 and 13 on the end face 8a of the head 8 of the opening / closing center shaft 3 are engaged and disengaged from each other, so that the user carelessly Even if the scissors 1 are touched, it becomes difficult for the scissors 1 to fall out of the sheath 14.

[Brief description of drawings]

FIG. 1 is a plan view showing a state in which a pair of scissors and a sheath according to this embodiment are separated from each other.

FIG. 2 (a) is a partially enlarged cross-sectional view showing a disassembled opening / closing center shaft portion of the scissors, and FIG. 2 (b) is a partially enlarged cross-sectional view showing the same assembled state.

FIG. 3 is an enlarged cross-sectional view taken along line XX of FIG.

FIG. 4 is a plan view showing a state in which the scissors are housed in a sheath from the state shown in FIG.

5 is an enlarged cross-sectional view taken along line YY of FIG.

[Explanation of symbols]

1 scissors, 2 blade, 3 opening / closing center shaft portion, 3a rotation center, 5 connecting body, 6 connecting body, 8 head portion, 8a end surface,
12 locking concave part, 13 locking concave part, 14 sheath, 15 blade insertion / extraction opening, 17 notch, 18 leaf spring part, 19 locking convex part, 20 locking convex part, A blade insertion / removal direction.

Claims (2)

(57) [Scope of utility model registration request] 1. A central shaft part (3) for opening and closing a pair of blades (2)
The scissors (1) rotatably supported by the blade and the sheath (14) for accommodating both blades (2) are provided, and a leaf spring portion (18) is formed in the sheath (14) and the leaf spring is formed. The locking portion (19, 2) is provided on the inner surface of the portion (18).
0) is formed, and a locking portion (12, 13) is formed on the head portion (8) of the opening / closing central shaft portion (3) protruding to the outside of the blade (2), and the sheath (14)
When both blades (2) are inserted into and removed from the blade insertion / extraction opening (15), the locking portions (12, 13) of the head (8) and the locking portions (19, 19) of the leaf springs (18). 20) can be engaged with and disengaged from each other by the elasticity of the leaf spring part (18), and in this housed state, the end face (8a) of the head (8) of the opening / closing center shaft part (3) is made by the leaf spring part (18). Locking structure between the scissors and the sheath, which is characterized by being concealed. 2. A central shaft part (3) for opening and closing a pair of blades (2)
It comprises scissors (1) rotatably supported by means of a blade and a sheath (14) for accommodating both blades (2). The sheath (14) is opened and closed substantially orthogonal to the blade insertion and removal direction (A). A leaf spring portion (18) having elasticity in a direction along the rotation center (3a) of the central shaft portion (3) is formed, and a locking projection (19, 2) is formed on the inner surface of the leaf spring portion (18).
0) is formed, and a locking recess (12, 13) is formed in the end face (8a) of the head (8) of the opening / closing central shaft portion (3) protruding to the outside of the blade (2), and the sheath (14) is formed. ) When inserting and removing both blades (2) into and from the blade insertion and removal opening (15), the locking recess (1
2, 13) and the locking projections (19, 19) between the leaf springs (18)
20) and 20) can be engaged with and disengaged from each other by the elasticity of the leaf spring portion (18).