JPS5922217Y2 - door locking device - Google Patents

Description

[Detailed description of the invention] This invention relates to the improvement of a door locking device used for small and lightweight doors such as hidden doors installed on the front of cabinets of television receivers, etc., and reduces the assembly process by reducing the number of parts. The object of the present invention is to obtain a door locking device that is inexpensive and has an excellent appearance.

A door locking device of this kind, an example of which is shown in cross-section in FIG. 1, basically comprises a locking device 10 and an attachment device 20 for slidably attaching the locking device to the door.

This locking tool 20 has an operating knob 13 on the top surface of the base 16.
It is a synthetic resin molded body integrally provided with a lock pawl 12 on the bottom surface that engages with a lock locking piece 21 provided in a recess C in the device housing, and is fitted along a sliding guide 22 arranged in the door body. , is assembled so as to be slidable within a range determined by the combination of the protrusion 14 and the retaining guide 23.

Normally, the spring 15 is biased to a level flush with the end of the door body.

Such a configuration requires complicated work such as the work of fitting the spring 15 and the spring 15 between the locking part 24 and the protrusion 17 of the locking device 20, and the work of fitting the protrusion 14 of the locking device 20 into the retaining guide 23. This requires a lot of work, and together with the large number of parts, this not only results in high costs, but also undeniably has various drawbacks, such as sometimes deteriorating the aesthetic appearance.

In consideration of these points, Japanese Utility Model Publication No. 16578/1983 proposes a structure in which the elastic plate 3 corresponding to the spring 15 is molded integrally with the movable plate 1.

However, in this conventional example, a fixed plate 2 independent of the movable plate 1 is provided to install the locking device on the back side of the door, and to guide the movable plate 1 in the sliding direction and regulate the sliding stroke. Step of fixing with protrusion 12 a, long hole 10 provided in movable plate 1
a process of fitting the washer 13 into the protrusion 12 after the elongated hole has been inserted into the protrusion 12, and a process of supporting the fixed plate and the movable plate on the door, respectively, by melting and expanding the tip of each protrusion 12. In addition, the movable plate and the fixed plate are molded in a form joined by an elastic plate 3, and the elastic plate 3 is difficult to handle due to bending, twisting, etc. Coupled with the need for complicated operations such as fitting washers and expanding the projections by melting the resin, this method has the disadvantage of not being compatible with automatic assembly.

The present invention has been devised in view of the various drawbacks of the conventional example.

The details of the present invention will be explained in Figs. 2 to 6 showing one embodiment.
This will be explained with reference to the figures.

FIGS. 2 and 3 are perspective views of the front and back sides of the locking device of the present invention, respectively.

This locking device 30 is made of an integrally molded body of synthetic resin such as impact-resistant styrene or polypropylene, and is designed to protect children 31.
A locking pawl 32, a pair of sliding blades 35, 36 each crowned with a locking pawl 33, 34, and an elastic biasing piece 37 are integrally provided.

The handle 31 is configured as a plate-shaped body perpendicular to the sliding direction of the locking tool 30 so as to easily apply sliding force to the locking tool 30, and is aesthetically treated to be easily seen.

The lock pawl 32 is integrally molded on the back side of the base 38, that is, on the opposite side of the handle 31, following the screen portion 39, but its position and key shape are determined by the locking pawl provided on the side of the cabinet body. What is necessary is just to consider the position and shape of the joining part 40, and to design it.

On both sides of the base 38, there are locking claws 33.
The sliding blades 35, 36 with 34 are integrally molded.

The sliding blades 35, 36 are designed in consideration of their width, thickness, and material so that they can be deflected inwardly with a small amount of elasticity parallel to the width direction of the base.

A pair of sliding protrusions 41 and 42 provided above the pair of sliding blades 35 and 36 eliminate frictional resistance of the locking tool 30 and smooth the sliding movement thereof.

Further, the elastic biasing piece 37 is a thin piece having a U-shaped cross section extending from the base 38, and a locking portion (not shown) may be provided at the free end 43 thereof.

Next, the structure of the deposition device 50 provided integrally on the back side of the door body will be described with reference to FIG. 4.

This device includes sliding guides 53, 53 having an angular cross-section that are planted on both sides of the guide recess 51, a locking protrusion 54 that is installed at the back of the guide recess 51, and the above-mentioned locking arrangement. It is composed of a recess 55 that guarantees and limits the stroke of the handle when worn.

Attachment of the locking tool 30 to the attachment device 50, that is, assembly of the door locking device, is performed using a snap-fit method.

That is, with the locking tool 30 in the state shown in FIG.
1, the head guide slope 44.45 of the engaging claw 33.34 comes into contact with the base 56.57 of the sliding guide 52.53 and slides. wing piece 35.3
Even if 6 bends inward against its elasticity, the locking device continues to be pushed in.

When the locking pawl 44.45 passes through the sliding guide 52.53, the sliding blade 35.36 comes into contact with the inner wall surface of the sliding guide 52.53, preventing the locking tool 30 from sliding within a certain range. Allow movement.

At the same time, the free end 43 of the U-shaped elastic biasing piece 37 comes into elastic contact with the locking protrusion 54, and the locking tool 30 is allowed to operate within the range where the engaging claws 33, 34 reach the base of the sliding guide 52, 53. 58. Push outward to the extent that it locks into 59.

In this state, the outside of the handle 31 is flush with the outside end d of the door body.

(See Figure 6) With this configuration, the door is locked when the head 46 of the locking claw 32 comes into contact with the engagement protrusion 40 on the cabinet body as the door is closed, and the locking tool 30 is elastically attached. The locking pawl 32 moves inward against the elasticity of the spring 37, climbs over the engagement protrusion 40, and then returns and engages in the manner shown in FIG. 5A.

Unlocking is performed by operating the handle 31 inward of the door as shown in the opening in Figure 5.

Since the present invention has the above-mentioned configuration, it does not require washers or the like as in the conventional case, in addition to the locking tool and attachment device, so it not only reduces costs by saving parts, but also allows the washer to fit and melt during assembly. In addition to eliminating the need for work processes such as expansion and simply using the snap-fit method, installing the sliding wing piece and the elastic biasing piece together with the base is especially advantageous because of the elasticity of the latter, which is difficult to assemble automatically. Coupled with the structure in which the end is positioned between the sliding blades, it is easy to handle even with automatic machines, has overall low cost and reliability due to fewer parts and fewer processes, and has excellent serviceability for replacement when the lock is damaged. It is possible to realize a door locking device that is both beautiful and aesthetically pleasing.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a main part of a conventional example. Figures 2 to 6 relate to the device of the present invention, and Figures 2 and 3 are perspective views of the locking tool seen from the front and back sides, respectively.
The figure is a perspective view showing the attached structure, FIG. 5A is a perspective view showing the locking and unlocking states, respectively, and FIG. 30...Lock, 31...Handle, 32
...Lock claw, 35°36...Sliding blade piece, 33.34...Engagement claw, 37...Elastic biasing piece.

Claims (1)

[Scope of utility model registration request] a base having a pair of elastic sliding blades at both ends that truncates a locking pawl, and an elastic base extending in the sliding direction from the base of the base and positioning a free end between the sliding blades. A biasing piece, a locking pawl extending in one direction in the thickness direction of the base, and a progenitor protruding in the other direction in the thickness direction of the base and having a handhold in the sliding direction of the base are integrated with synthetic resin. A locking tool molded into a shape, a recess that is opened at the non-pivot edge of the door and guides the heir in the depth direction, and a recess that is arranged in parallel on the back surface of the door at a distance of the sliding blades. each of which is provided with a sliding guide having an angular cross-section and a depth side of the sliding guide, which locks the free end of the elastic biasing piece and prevents the locking pawl from returning. The attachment device is provided with a locking protrusion that defines the sliding stroke of the locking device together with the outer side of the base, and the pair of elastic sliding blades of the locking device are guided in the pair of sliding strokes of the attachment device. A door locking device that is press-fitted along the space between the doors.