JP3074127B2 - Opening and closing structure for scissors - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scissor in which a pair of scissors pieces are rotatably supported by an opening / closing center portion, and the structure of the scissors is capable of changing the opening / closing state.

[0002]

2. Description of the Related Art In conventional scissors disclosed in Japanese Utility Model Laid-Open Publication No. Hei 5-26067, biasing means (as shown in FIG. 1 of the same publication) which allows both scissor pieces to be opened and closed while being biased in the opening direction by a spring. The torsion coil spring 12 is attached to the opening / closing center shaft 3 and the lever 23 of the handle 6 is removed from the handle 7), and locking means for disabling opening and closing when both scissors are closed (FIG. A state in which the lever 23 of the handle part 6 is hooked on the handle part 7 as shown in FIGS. 1 and 2) and a release means for opening and closing both scissors pieces in a spring-released and unlocked state (FIG. As shown in FIG. 5, the torsion coil spring 12 is removed from the opening / closing center shaft 3 and the lever 23 of the handle 6 is removed from the handle 7).

[0003]

However, in the case of each of the above-mentioned states, separate operations must be performed, and the operations are troublesome.

[0004] The present invention, by the operation body in the vicinity closing the center, and aims to provide a pair of scissors may easily switched to the state.

[0005]

FIG. 1 is a diagram showing an embodiment to be described later (FIG. 1).
The present invention will be described with reference to reference numerals 7) to 7). The scissors according to the present invention are configured as follows.

[0006] A pair of scissors pieces (1, 2) are opened and closed at the center (3).
And rotatably supported by, provided with a handle part (4,5) to the proximal end side than the opening center (3), the blade portion to the distal end side than the opening center (3) (6,7 ) and it has established
You.

The opening / closing center axis of the opening / closing center portion (3) (the
Operating body (1) with respect to both locking pins 8, 9 and set screw 10)
2) is movably supported. This operation tool (12)
Indicates the open / close bias position (A), open / close lock position (B), and open / close position.
Free position (C) and open / close center
(3) Opening / closing center shaft (both the retaining pins 8, 9 and the retaining
10) is rotatably supported around its center.
You.

When the operating body (12) is in the open / close biased position (A), both scissors pieces (1, 2) are actuated by a spring (11).
There is provided an urging means (EA) which can be opened and closed while being urged in the opening direction . This biasing means (EA) is operated
A spring (11) for urging and rotating the body (12);
The rotation of the operating body (12) by the urging force of the spring (11) is
The operator of the operating body (12) that transmits the opening of the scissor pieces (1, 2)
And a stop portion (locking projection 18).

When the operating body (12) is set at the open / close lock position (B), a lock means (LB) is provided to disable opening and closing when both scissors pieces (1, 2) are closed . This lock
Locking means (LB) is provided with a locking portion (engagement member) provided on the operating body (12).
Locking recess 19) and the locking portion (locking recess 19).
To prevent the opening of both scissors (1, 2)
(1), with a locking portion (locking projection 22) provided
I have. Open / close free position (C) of the operating body (12)
Release means (FC) for opening and closing both scissors pieces (1, 2) in the state where the spring is released and the lock is released.
You. The release means (FC) is provided on the operating body (12).
The locking portion (locking projection 18) and the locking portion (locking projection 1)
8), the biasing force of the spring (11) is applied to both scissors (1, 1).
2) Scissors pieces to prevent transmission as opening
And a locking portion (locking recess 21a).

[0010]

[0011]

In the present invention, both scissors pieces (1, 2) are urged and opened by the spring (11) at the opening / closing bias position (A) of the operating body (12), and the operating body (12) is opened / closed. In the lock position (B), the both scissors pieces (1, 2) are kept closed, and in the open / close free position (C) of the operating body (12), both scissors pieces (1, 2) are closed.
The biasing force of the spring (11) does not work when opening 2).

[0012]

[0013]

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A scissors according to an embodiment of the present invention will be described below with reference to the drawings. As shown in FIGS. 3 to 7, the pair of scissors pieces 1 and 2 are rotatably supported by an opening / closing center portion 3, and handle portions 4 and 5 are provided on the base end side of the opening / closing center portion 3. At the same time, the blade 6,
7 are provided.

As shown in FIGS. 1 and 2, in the opening / closing center portion 3, a stop pin 8 is inserted from the outside of the first scissor piece 1 and a stop pin 8 is inserted from the outside of the second scissor piece 2. 9 is engaged with the stop pin 8 of the first scissor piece 1, and the set screw 10 is inserted into the head 9a of the stop pin 9 of the second scissor piece 2.
Is screwed into the stop pin 8 of the first scissor piece 1. The two sets of pins 8 and 9 are integrally connected by the set screw 10, and the first scissors piece 1 can rotate integrally with the two sets of pins 8 and 9. The second scissor piece 2 is rotatable with respect to the first scissor piece 1.

The spring 11 is attached to the head 9a of the stop pin 9 on the side of the second scissors piece 2 at the opening / closing center portion 3, and is shown in FIG.
As shown in FIGS. 2A and 2A, a leaf spring bent in a J shape or a torsion coil spring shown as another example in FIG. 2D is used. The fixed end 11a of the spring 11
Is locked to the second scissor piece 2.

The plastic operating body 12 comprises an operating body main body 13 and a lid 14 for covering the front side of the main body 13. A guide hole 17 is formed on one side of the operation body 13 between elastic portions 16 formed by two long holes 15.
This guide hole 17 has circular switching holes 17a, 17b, 17c.
Are connected in a series. These switching holes 17a, 17
The head 9a of the stopper pin 9 on the second scissor piece 2 side is inserted into any one of the members b and 17c, and the operation body 12 stops around any one of the switching holes 17a, 17b and 17c. The pin 9 is rotatable around the center of the head 9a. The spring 11 is fitted on the back side of the operating body 13, and its free end 11 b is locked on the inner peripheral wall of the operating body 13. The elastic force of the spring 11 causes the operating body 12 to move toward the first scissors piece 1. It turns and stops.

As shown in FIG. 1B, a locking projection 1 is provided on the back side of the operation body 13 opposite to the guide hole 17.
8 are formed, and locking recesses 19 are formed on both sides of the locking projection 18. Cuts 20 and 21 are formed in the opposing surfaces of the handles 4 and 5 of the pair of scissors pieces 1 and 2 in the vicinity of the locking projection 18 and the both locking recesses 19.
When the is closed, both cuts 20, 21 are formed in a long hole shape. Cut 2 of handle 5 of second scissors 2
1 has a locking recess 21a. Locking projections 22 are formed on the handles 4 and 5 of the scissors pieces 1 and 2 in the vicinity of the cuts 20 and 21.

As shown in FIG. 3, with both handle portions 4 and 5 closed, the operating body 13 of the operating body 12 is moved to the open / close biasing position A to stop the second scissors piece 2 side. When the head 9 a of the pin 9 is inserted into the first switching hole 17 a of the guide hole 17, the locking projection 18 of the operating body 13 is disengaged from the locking recess 21 a of the second scissor piece 2 between both cuts 20 and 21. At the same time, the locking projections 22 of the handle portions 4 and 5 are disengaged from the locking recesses 19 of the operation body 13. Therefore, when the force for closing the two handle portions 4 and 5 is released in the state of FIG. 3, as shown in FIG.
Is rotated toward the first scissor piece 1 by the elastic force of the spring 11, and the locking projection 18 of the operation body 13 presses the cut 20 of the handle 4 of the first scissor piece 1 to move the two handle parts 4, 5. Are opened to each other.
When the two handle portions 4 and 5 are closed against the elastic force of the spring 11, the state shown in FIG. 3 is obtained.

As shown in FIG. 3, when the handle 4 and 5 are closed and the operating body 13 is moved to the open / close lock position B and the head 9a is inserted into the second switching hole 17b. 5
As shown in FIG. 5, the locking projections 22 of the handle portions 4 and 5 are operated while the locking projections 18 of the operating body 13 are disengaged from the locking recesses 21a of the second scissor piece 2 between the cuts 20 and 21. Body 13
Are engaged in the two locking concave portions 19. Therefore, the resilient force of the spring 11 prevents the two handles 4, 5 from opening each other, and the closed state of the both handles 4, 5 is maintained.

As shown in FIG. 3, when both handle portions 4 and 5 are closed and the operation body 13 is moved to the open / close free position C and the head 9a is inserted into the third switching hole 17c. 6
As shown in FIG. 5, the operating body 1
3 is provided between the two notches 20 and 21 so that the second scissors 2
Is locked in the locking recess 21a. Therefore, as shown in FIG. 7, the operating body 13 is prevented from rotating toward the first scissors piece 1 by the elastic force of the spring 11 so as to be integrally rotatable with the second scissors piece 2. Spring 11 when opening handle portions 4 and 5 of 1, 2
Does not work.

This embodiment has the following features (a) to (c). (A) The opening / closing bias position A, the opening / closing lock position B, or the opening / closing free position C can be easily switched by simply moving the operating body 12.

(B) At the opening / closing center portion 3, the operating body 1
2 and the spring 11 can be compactly assembled. (C) Since the operating body 12 is supported on the head 9a of the stop pin 9 on the side of the second scissors piece 2, parts are effectively used by using the existing head 9a of the stop pin 9 in the opening / closing center portion 3. Points can be reduced.

[0024]

[0025]

[0026]

[0027]

[0028]

[0029]

According to the scissors of the present invention, the operating body (1)
By simply moving 2), it is possible to easily switch between the open / close biasing position (A), the open / close lock position (B), and the open / close free position (C), as well as at the open / close center (3).
Operation body (12) and spring (11)
Can be

[0030]

[Brief description of the drawings]

FIG. 1A is a partially exploded perspective view showing an open / close center portion of scissors of the present embodiment, FIG. 1B is a partial perspective view showing the back side of an operation body main body shown in FIG. ) Is (a)
It is a fragmentary perspective view which shows the stop pin shown in FIG.

2 (a) is a partially exploded perspective view showing a state in which both scissors pieces, both locking pins and a spring are sequentially assembled from the state of FIG. 1 (a), and FIG. 2 (b) is an operation from the state of FIG. 1 (a). It is a partially exploded perspective view showing a state where the operation body main body of the body is assembled,
(C) is a partially assembled perspective view showing a state where the lid of the operating body is further assembled from the state of (b), and (d) is (a).
FIG. 10 is a partial perspective view showing another example of the spring shown in FIG.

FIG. 3A is a plan view showing a state in which both handle portions are closed in the scissors of this embodiment in an open / close biased state, and FIG.
3 is a partially enlarged plan view of FIG.

FIG. 4A is a plan view showing a state in which both handle portions are opened in the scissors of the present embodiment in an open / close biased state, and FIG.
3 is a partially enlarged plan view of FIG.

FIG. 5A is a plan view showing a state in which both handle portions are closed in the scissors of the present embodiment in an open / close locked state;
(B) is a partial enlarged plan view of (a).

FIG. 6A is a plan view showing a state in which both handle portions are closed in the scissors of the present embodiment in an openable / closed free state,
(B) is a partial enlarged plan view of (a).

FIG. 7A is a plan view showing a state in which both handle portions are opened in the scissors of the present embodiment in an openable / closable state,
(B) is a partial enlarged plan view of (a).

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Scissor piece, 2 ... Scissor piece, 3 ... Opening / closing center part, 4 ... Handle part, 5 ...
Handle part, 6 blade part, 7 blade part, 9 locking pin, 9a head, 11 spring, 12 operating body, 13 operating body, 1
7: guide hole, 17a: switching hole, 17b: switching hole, 17c
... switching hole, 18 ... locking projection, 19 ... locking recess, 21a ...
Locking concave portion, 22: locking projection, A: open / close biasing position, B: open / close lock position, C: open / close free position, EA: biasing means,
LB: locking means, FC: releasing means.

Claims (1)

(57) [Claims] A pair of scissors pieces (1, 2) are rotatably supported by an opening / closing center (3), and the opening / closing center (3)
In the scissors provided with the handle portions (4, 5) on the proximal end side and the blade portions (6, 7) on the distal end side with respect to the open / close center portion (3), Opening / closing center axis (8, 9, 10)
On the other hand, the operating body (12) is movably supported, and
(12) is the open / close biasing position (A) and the open / close lock position
(B) and open / close free position (C).
With respect to the opening / closing center axis (8, 9, 10) of the opening / closing center (3)
State thereof is rotatably supported at the center around, when the operating body (12) closing biasing position (A), which was spring biased (11) towards the opening of both scissor pieces (1, 2) When the operating body (12) is brought to the open / close lock position (B) ,
When the operating body (12) is in the open / close free position (C) when the operating means (12) is in the open / close free position (C) ,
E Bei and release means (FC) to be opened and closed in both scissor pieces (1, 2) a spring-loaded release and unlocked condition, said biasing means (EA) biases the operating member (12) Time
The spring (11) to be moved and the biasing force of the spring (11)
The rotation of the operating body (12) by opening of both scissors pieces (1, 2)
And a locking portion (18) of the operating body (12) to be transmitted. The locking means (LB) is provided on the operating body (12).
A stopper (19), and both scissors engaged with the stopper (19).
Both scissors pieces (1,2) so as to prevent opening of the pieces (1,2)
And a release portion (FC) provided on the operating body (12).
(18) and a spring engaged with the locking portion (18).
Transmit the biasing force of (11) as the opening of both scissors pieces (1,2)
Locking portion (21) provided on the scissor piece (2) so as to prevent the
a) opening and closing structure of the scissors, comprising: