JP2597693Y2 - Bag lock safety device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safety device for preventing accidental unlocking of a bag lock.

[0002]

2. Description of the Related Art Conventionally, there is a bag lock which is likely to be unlocked due to careless operation of an operation plate by external force or the like.
Although a safety device as shown in Japanese Patent No. 41575 is provided, the operation is not performed smoothly because the operation plate must be operated while pressing the operation plate, and the structure is complicated. There were problems such as becoming.

[0003]

SUMMARY OF THE INVENTION The object of the present invention is to eliminate the above-mentioned drawbacks of the prior art and to make the operation easy and accurate.
It is an object of the present invention to provide a bag lock safety device that does not have a complicated structure.

[0004]

The means of the present invention are as follows. The safety knob is pivotally attached to the locking and unlocking operation plate adjacent to the opening / closing operation plate by the action of a spring so that it can rotate, and it comes into contact with the tip edge when the safety knob is closed to prevent accidental operation The piece is fixed to the bag side, the switching piece is slid into the guide fitting fixed inside the operation plate, and the tip of a pin provided by applying a spring to the safety knob is fitted to close the safety knob. A safety device for a bag lock, wherein a switching groove that is stable in the open position and the open position is formed on one surface of the switching piece.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A specific example of a bag lock safety device according to the present invention will be described with reference to the drawings. In the drawing, reference numeral 1 denotes a lock substrate, which is fixed to a bag K together with the lock body 3 by set screws 2 and 2, and a locking piece L is attached to the lid side. An operation plate 4 is mounted adjacent to the lock body 3 so as to be openable and slidable, a safety knob 5 is connected to the end of the operation plate 4, and the safety knob 5 is pivotally attached to the operation plate 4 by a pin 6. Then, the fastening piece 8 of the safety knob 5 is fixed to the bag K with the stopper 7. The operation plate 4 is connected to a sliding body 13 in the lock body 3 by a pin 12 which enters a horizontally elongated hole 11 provided in a standing piece 10 of the base plate 1, and opposes a spring 14 acting on the sliding body 13, Reference numeral 4 abuts against the lock body 3 (see FIG. 3), and the safety tab 5 also comes into contact with the fastening piece 8 to be stabilized. In the middle part of the operation plate 4, one end of a connecting piece 17 pivotally connected to the standing piece 15 of the substrate 1 with a pin 16 is connected to a pin 19.
The safety knob 5 is attached by a mechanism described below so as to be pivotally attached to the substrate 1 so as to be able to undulate, and constitute a main part of the present invention. As shown in FIGS. 6 and 7, the operation plate 4 has a gate-shaped cross section, a connection fitting 20 is fixed inside the operation plate 4, and a pair of leg pieces 21 integrally protruding from the rear end of the safety knob 5 are connected to each other. The coil spring 25 inserted into the pin 22 through the insertion hole 23 of the leg 21 and the small hole 24 of the connection fitting 20 by the pin 22
1 to act on the safety resection 5. An engaging groove 28 formed in the switching piece 27 is fitted into the front piece 20a of the connection fitting 20 to make the switching piece 27 slidable, and a pin 30 that enters the heart-shaped switching groove 29 on the front face of the switching piece 27 is spring-loaded. 31 together with an insertion hole 34 formed in a protruding portion 33 on the back surface of the safety knob 5, the tip of the pin 30 is pressed against the heart-shaped switching groove 29, and the pin is moved by the movement of the safety knob 5 as described later. 30 is the switching piece 2
7 moves from the deep groove portion 29a of the heart-shaped switching groove 29 to the shallow groove portion 29b, the middle deep portion 29c, the deep groove portion 29d, and the shallow groove portion 29e to open and close the safety knob 5.

[0006]

As shown in FIG. 8, the heart-shaped switching groove 29 of the switching piece 27 has a shallow groove 2 which gradually becomes shallower from the deep groove 29a.
9b, abruptly reaches the middle deep portion 29c from there, and becomes a shallow groove portion 29e adjacent to the middle groove portion 29d and gradually becomes shallow to the deep groove portion 29a. In the state where the safety tab 5 is closed as shown in FIG. 3 and the tip is in contact with the fastening piece 8 (FIG. 8A), the pin 30 is in contact with the deep groove 29d. When the safety knob 5 is pushed at the position, the pin 30 moves down and enters the deep groove 29d, so that the switching piece 27 moves along the front piece 20a. When the pressed fingertip is released, the pin 30 moves upward, enters the deep groove portion 29a from the deep groove portion 29d through the shallow groove portion 29e, the switching piece 27 slides in the opposite direction, and the safety knob 5 moves as shown in FIG. open. Therefore, when the safety knob 5 is lifted with a fingertip, the operation plate 4 is unlocked as shown in FIG. Thereafter, when the operation plate 4 is locked and the safety knob 5 is pressed, the pin 30 is lowered and enters the deep groove 29d.
Is stable in the closed position and the tip of the safety knob 5 comes into contact with the fastening piece 8, so that the operation plate 4 is not accidentally operated.

[0007]

According to the present invention, when the operation plate 4 is in the locked state, the safety tab 5 is aligned with the fastening piece 8 and its tip does not operate, so that there is no possibility of accidental unlocking. And at the time of unlocking, you can easily and securely open the safety knob by pressing it with your fingertips,
Practical value increases.

[Brief description of the drawings]

FIG. 1 is a front view.

FIG. 2 is a bottom view.

FIG. 3 is a sectional view taken along the line AA in FIG. 1;

FIG. 4 is a cross-sectional view showing a state where a safety knob is opened.

FIG. 5 is a sectional view of the operation plate in an unlocked state.

FIG. 6 is an exploded perspective view of the operation plate, the safety knob, and its attached parts.

FIG. 7 is a perspective view of a safety knob and a switching piece.

FIG. 8 is an explanatory view showing the movement of a safety knob operating pin entering a heart-shaped switching groove formed on the front surface of the switching piece.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lock board 3 Lock body 4 Operation plate 5 Safety tab 8 Fastening piece 9 Bending leaf spring 20 Connection fitting 20a Front piece 21 Leg piece 27 Switching piece 28 Engagement groove 29 Heart-shaped switching groove 29a Deep groove 29b Shallow groove 29c Medium Deep 29d Deep groove 29e Shallow groove 30 pin

Claims (1)

(57) [Scope of request for utility model registration] 1. A safety knob is pivotally connected to a locking / unlocking operation plate which opens and closes by operating a spring in a rotatable manner. A fastening piece for preventing operation is fixed to the bag side, a switching piece is slidably fitted on a guide fitting fixed inside the operation plate, and a tip of a pin provided by applying a spring to the safety knob is fitted. A safety device for a bag lock, wherein a switching groove for stabilizing a safety tab in a closed position and an open position is formed on one surface of the switching piece.