JPS6113654Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a locking device, and particularly relates to a combination structure of a lock plate that directly performs the locking action and a member that holds the lock plate.

When constructing a relatively simple locking device,
We always take care in designing to keep the number of parts to a minimum and to make it easy to assemble.

The present invention is based on the conventional design method and has been developed to create a new structure for this type of lock. In a device that consists of a plate and locks by shifting the lock plate to the left and right and fitting a part of the lock piece to a lock receiving part protruding from the base plate, the lock piece is held in a predetermined position shifted from the left to the right. A spring piece for the lock box is formed by cutting out a part of the side plate of the lock box, and the side plate is formed so that the spring piece and the opposing side plate slidably hold the lock plate inside the lock box. A retaining protrusion for the lock plate is formed by punching inward. This configuration eliminates the need for springs and their mounting pins, which were conventionally constructed as separate parts, and also eliminates errors caused by joining many parts, increasing accuracy, and also ensures secure retention of the lock plate. In this way, assembly work can be easily performed.

The present invention will now be described in detail based on the illustrated embodiment. Reference numeral 1 denotes a buckle-type latch equipped with a locking device 10 of the present invention, which is attached to the back side of an operation cover 2. The reference numeral 3 is a tightening plate, 4 is a base plate, and 5 is a latch.

This locking device 10 consists of a flat gutter-shaped lockbox 11 and a lock plate 12 that slides inside the lockbox 11.
First, the lock box 11 includes a bottom plate 13 and side plates 14 and 15 raised on both sides along the longitudinal edges of the bottom plate 13.

A spring piece 16 is formed on one side plate 14, and the spring piece 16 is bent slightly inward, and its tip 16a is bent into a hook shape.
On the other hand, on the other opposing side plate 15, a portion slightly above the bottom plate 13 is pressed inward by a press to form a holding protrusion 17. Further, the bottom plate 13 has a receiving hole for the key core 18 in its center, and a receiving hole 19 for the lock receiving part 4a near the side edge. Such a lock box 11 has a lock plate 1 having a substantially flat plate shape inside the lock box 11.
2, which has the following configuration. That is, its planar shape is generally rectangular, with a convex key receiving hole 2 in the center.
Further, a lock piece 21 is provided protruding from one end, and a positioning piece 22 is formed at the other end at a position where the spring piece 16 contacts. As an example, the positioning piece 22 is press-molded so as to rise diagonally from the lock plate 12, and has a convex portion 23 set on its upper edge.
form. The positioning piece 22 may be formed diagonally from the lock plate 12 or may be punched out parallel to the lock plate 12. Furthermore, if the setting protrusion 23 is formed in a mountain shape so that both the left and right sides on which the tip 16a of the spring piece 16 slides are oblique, the locking plate will be prevented by the looseness of the engagement between the tip 16a and the setting protrusion 23. 12 does not move back and obstruct the rotation of the key K.

The present invention has such a configuration, and in order to lock the door, the operation cover 2 is inverted toward the board 4 side, and the key K is inserted into the keyhole in the operation cover 2 for operation. At this time, the locking device 10 attached to the back surface of the operation cover 2 causes the lock receiving portion 4a protruding from the base plate 4 to enter the receiving hole 19 in the lock box 11. Further, as shown in FIG. 4A, the lock plate 12 is shifted to the left side in the figure, and the key receiving hole 20 in the lock plate is also centered somewhat to the left of the key core 18. Further, the spring piece 16 sets the position of the lock plate 12 by bringing its tip into contact with one side surface of a setting convex portion 23 formed on the positioning piece 22 of the lock plate 12. When the key K is rotated in the clockwise direction in FIG. is the key hole 20
Slide the upper slope 20a of the lock plate 12 in Fig. 4B,
Move it to the right as shown in (c). In such a case, the lock piece 21 of the lock plate 12 enters the key receiving hole of the lock receiving part 4a and becomes the locked state, and the spring piece 1
6 also returns to the setting convex portion 23 on the positioning piece 22
The lock plate 12 maintains the locked state by contacting the other side of the door. To release such a locked state, the key K should be turned counterclockwise in the figure by reversing the previous operation. In such a case, the lock plate 12 is returned to the left in the figure in the opposite direction to the case of locking, and the lock piece 21 is pulled out from the hole in the lock receiving part 4a.

The present invention has the above-described configuration and operation mode, and has the following effects. First of all, in this invention, the spring piece that holds the lock plate in place is not an independent member, but is formed integrally using a part of the lock box, which reduces the number of parts. Since the assembly process is no longer necessary, manufacturing costs can be reduced.

In addition, since the spring piece is integrally formed with the lock box, the number of parts can be reduced, and a product with high precision can be obtained. Furthermore, since the lock plate is held by the inward protrusion of this spring piece and the holding protrusion provided on the opposing side plate, assembly work can be easily accomplished.

[Brief explanation of the drawing]

Figure 1 is a perspective view showing the state in which the latch equipped with the locking device of the present invention is used, Figure 2 is an exploded perspective view of the same, Figure 3 is a longitudinal sectional side view of the same, and Figure 4 A to C are states of locking action. FIG. 1... Latch, 2... Operation cover, 10... Locking device, 11... Lock box, 12... Lock plate, 14, 15
... Side plate, 16 ... Spring piece, 17 ... Holding protrusion,
22...Positioning piece.

Claims (1)

[Scope of utility model registration request] It consists of a flat gutter-shaped lock box and a lock plate that slides inside the lock box, and is locked by shifting the lock plate left and right and fitting the lock piece that is a part of the lock plate into the other fixed lock receiving part 4a. In the device, a spring piece is integrally formed from one side plate of the lock box, the lock plate is held by this spring piece, the tip of the spring piece is locked with a positioning piece on the lock plate, and the spring piece is A locking device characterized in that a side plate on the side opposite to the lock plate is formed with a holding protrusion for a lock plate.