JPH048214Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Application of the Invention) This invention relates to an opening/closing device suitable for use in opening and closing, for example, a lid body or a door body.

(Prior art) For example, Utility Model Publication No. 53-38000 or Utility Model Application No. 58-
As disclosed in No. 134562, etc., an actuating body is provided in the case body so as to be retractable by applying a push-latch mechanism, and the push-latch mechanism is elastically installed between the actuating body and the case body to form a compression coil spring. , consists of an endless groove carved in the actuating body and a cam pin whose tip end is fitted into the endless groove, and a rear part of the cam pin is led out of the case body, and the rear part of the cam pin is connected to the case body. Conventional opening/closing devices for door bodies, etc., which engage a torsion coil spring wrapped around the tail protruding from the rear of the door body, are susceptible to rust because the torsion coil spring is exposed to the outside. There were many cases in which people accidentally removed and lost the torsion coil spring, and there were other problems such as the need for an additional torsion coil spring.

Furthermore, with the conventional type mentioned above, it is not possible to install the compression coil spring after installing the cam pin during assembly, so the spring is installed first, then the cam pin is inserted into the spring, and the endless The problem is that the part to be fitted into the groove is obstructed by the spring and the view is blocked, so the user has to grope for the engagement with the endless groove, making the assembly complicated. It was hot.

Furthermore, even after assembly is completed, the cam pin is housed as a whole inside the spring, and the cam pin's swinging motion within the endless groove is likely to be hindered by the spring and not move smoothly, and the spring itself There was also the problem that compression/expansion operations were also affected.

(Technical Issues) The technical issues of this invention are to omit the torsion coil spring that was required in the above-mentioned conventional model, reduce the number of parts and reduce costs, and attach the spring that energizes the cam pin to the case. To provide an opening/closing device, such as a door body, which is housed inside the main body to prevent it from rusting or from being played with by children, and which has a structure that is stable in operation and easy to assemble.

(Technical Means) In order to achieve the technical problems of this invention, this invention consists of a lid body, a case body with one end open to which the lid body is attached, and an actuator housed in the case body so as to be freely retractable. a protruding piece protruding from one side of the actuating body; an endless groove provided in the protruding piece; and a protruding piece located on one side of the protruding piece for slidingly biasing the actuating body in one direction. a compression coil spring resiliently installed between the actuating body and the bottom plate of the case body; and a compression coil spring located on the lid body side facing the compression coil spring with the projection piece in between. a cam pin whose one end is fitted into an endless groove and whose other end is latched to the bottom plate of the case body so as to be able to open the fan; and one end of the cam pin, which extends in the circumferential direction from one end of the compression coil spring. and a locking part engaged with one side of the cam pin in order to press the cam pin into the endless groove.

(Example) According to the drawings, in FIGS. 1 and 2, there is a space between a box A, which is a cabinet for storing audio equipment, for example, and a door B, which is attached to the front of the box A so that it can be opened and closed. An opening/closing device C such as a door body is installed by being attached to the lower surface of the top plate a of the box body A.

The structure of this opening/closing device C is particularly shown in FIGS. 3 to 6. According to the drawings, reference numeral 1 denotes a case body with an opening at the tip to which a lid 2 is attached, and mounting portions 1a, 1a (only one shown) are provided on the left and right sides. An actuating body 3 is housed through the case body 1 in the front-rear direction so as to be retractable by applying a push latch mechanism D. A permanent magnet 4 is attached to the tip of the actuating body 3. Magnetic bodies 5, 5 (only one is shown) are attached to both sides of the magnet 4, and their tips protrude forward of the actuating body 3.

The push latch mechanism D includes a compression coil spring 6 elastically installed between the actuating body 3 and the bottom plate 1b of the case body 1, and a number of stepped portions 8b, 8c, 8d, 8e carved on the surface of the actuating body 3. and a cam pin 7 having a key-shaped tip 7a fitted into the endless groove 8, and the cam pin 7 has an engaging portion 7b at the other end connected to a locking hole 1c provided in the case body 1. At the same time, the rear part is locked by a locking part 9 with a compression coil spring 6 extending from the end, and the key-shaped tip 7a is pressed into the endless groove 8.

Therefore, especially when the actuating body 3 is housed in the case body 1 as shown in FIG. 3, the cam pin 7 is not engaged with the endless groove 8 as shown in FIG. The actuating body 3 is locked at this position by being locked by the stop 8a. The magnetic body 5, which is magnetized and protrudes from the tip of the operating body 3, magnetically attracts the attraction piece b attached to the door body B, and holds the door body B in a closed state.

From this state, if you push the door body B a little and release your hand,
The actuating body 3, together with the suction piece b, moves slightly backward against the elasticity of the compression coil spring 6, and at the same time, the cam pin 7 is guided by the first step 8e of the endless groove 8 and falls into the second step 8b. Next, the actuating body 3 moves forward due to the elasticity of the compression coil spring 6, and the cam pin 7 is guided by the second step portion 8b and moves in the endless groove 8 while swinging laterally without returning to its original position. It falls into step 8c. At the same time, operating body 3
However, as shown in Fig. 4, the case body 1
It stops when it hits the inside or the protrusion 2a provided on the lid body 2.

Of course, at this point, the cam pin 7 may be locked in the endless groove 8 to prevent the actuating body 3 from moving further forward.

Next, when the door body B is pushed in the closing direction to close it, the actuating body 3 is pushed into the case body 1 against the elasticity of the compression coil spring 6, and at the same time the cam pin 7 is pushed into the third step portion 8c. As a result, the actuating body 3 moves into the endless groove 8 in the opposite direction to the previous direction while swinging without returning to its original position, and when it falls into the fourth step 8d, the actuating body 3 hits the inside of the case body 1. It reaches a state where it cannot be pushed in any further, so when you release your hand at this point, the cam pin 7 moves to the fourth step 8.
d, falls into the first step portion 8e, and is locked at this position by the locking portion 8a. At the same time, the actuating body 3 is also locked via the cam pin 7, and in this state, the magnetic body 5 magnetically attracts the attraction piece b of the door body B, and the door body B is closed as shown in FIG. As long as it is maintained in this state, this operation is reliably and smoothly repeated every time the actuating body 3 is pushed by the cam pin 7 which is always pressed against the endless groove 8.

(Effects) As explained in detail above, this invention has been
Even if the torsion spring used to bias the cam pin is omitted, costs can be reduced by replacing it with a locking part extending from the compression coil spring that biases the actuating body. In addition, since the torsion coil spring is not exposed to the outside like in conventional products, it has a sleek appearance and is less likely to rust or be misplaced by children. It can have effects.

Furthermore, with this idea, the compression coil spring and cam pin are placed separately across a protrusion provided on the actuating body, and the cam pin is located on the lid body side, so the cam pin can be assembled with the cam pin clearly visible from the outside. In addition to making the assembly work extremely easy, the fan-opening operation of the cam pin and the compression/expansion operation of the spring can be performed smoothly without interfering with each other.

[Brief explanation of the drawing]

Figure 1 is a perspective view of a box implementing this invention, Figure 2 is an enlarged side view of the same part, Figure 3 is a side sectional view of the opening/closing device according to this invention, and Figure 4 is when the operating body moves forward. 5 is a perspective view of the compression coil spring, FIG. 6A is a perspective view of the endless groove, and FIG. 6B is a plan view of the same. A...Box body, B...Door body, C...Opening/closing device, D
... Push latch mechanism, 1 ... Case body, 3
...Operating body, 6...Compression coil spring, 7...
...Cam pin, 8... Endless groove, 9... Locking part.

Claims (1)

[Scope of utility model registration request] A lid body, a case body with one end open to which the lid body is attached, an actuating body housed in the case body so as to be freely retractable, a protruding piece protruding from one side of the actuating body, and this protruding piece. and a compression coil located on one side of the projecting piece and resiliently installed between the actuating body and the bottom plate of the case body in order to slide and urge the actuating body in one direction. One end of the spring is fitted into the endless groove provided on the lid side, facing the compression coil spring with the protrusion in between, and the other end is fanned out into the bottom plate of the case body. a cam pin that is operably locked; and a cam pin that extends circumferentially from one end of the compression coil spring and engages one side of the cam pin to press the one end of the cam pin into the endless groove. An opening/closing device for a door body, etc., characterized in that it is composed of a locking part.