JPH0717189Y2 - Closed case open structure - Google Patents

Description

[Detailed Description of the Invention] [Outline] The present invention relates to an opening structure of a close case composed of an upper case and a lower case, and more specifically to a structure for mechanically opening the upper case. For the purpose, there is provided an open structure of a close case, in which an upper case having a mounting hole and a lower case having a screw hole corresponding to the mounting hole are airtightly coupled by a mounting screw. A screw pin is provided in the mounting fool hole by screwing, and a screw pin formed by a screw part screwed into the screw hole and a shaft part inserted into the root diameter of the screw hole of the lower case is provided, and the screw part of the screw pin Is screwed into the screw hole of the upper case, the tip end surface of the shaft portion is abutted against the bottom surface of the screw hole of the lower case, and screwed to open.

[Industrial application field]

The present invention relates to an opening structure of a close case composed of an upper case and a lower case, and more particularly to a structure for mechanically opening the close upper case.

For example, a case for accommodating and sealing an electronic circuit includes an upper case and a lower case, and the electronic circuit is put in the lower case and the upper case is hermetically closed. At this time, if a rubber packing made of neoprene or the like is inserted between the upper case and the lower case and screwed for a long period of time, the upper case and the lower case may come into close contact with each other due to the rubber packing. There is a demand for an opening structure that can be easily opened when the upper case needs to be opened.

[Conventional technology]

As shown in the perspective view of FIG. 4 and the side sectional view of the main part of FIG. 5, the conventional open structure of the contact case is such that, in the case of the contact case described above, an upper case 11 and a lower case formed by molding a synthetic resin material. Insert rubber packing 13 such as neoprene between 12 and 12 so that the mating surfaces of the peripheral edges overlap with each other, insert mounting screw 14 into mounting fool hole 11a formed in upper case 11, and further lower case 1
The screw 12a-1 formed in 2 is screwed into the screw 12a-1 to be tightly coupled by screwing.

Check the electronic circuit 10 in the lower case 12
When removing 14 and opening the upper case 11, the rubber packing 13 sticks and sticks because it is screwed together for a long time, and the tip of the screwdriver is inserted between the upper case 11 and the lower case 12. I'm prying open.

The screw hole 12a-1 of the lower case 12 is formed by insert molding an embedded nut 12a having the screw hole 12a-1.

[Problems to be solved by the device]

However, according to the above structure, the upper case is in close contact and cannot be easily opened.Therefore, if you pry it open using a screwdriver, etc., the case and the rubber packing will be scratched and cannot be reused. There was a problem that it took time to open it.

In view of the above problems, an object of the present invention is to provide a contact case opening structure that can be easily opened without damaging the upper case.

[Means for Solving the Problems]

According to the present invention, the above-mentioned object is achieved by using the through holes (1
a), screw holes (1a-1) at least in the upper part of the fool hole
An upper case (1) provided and a lower case (2) having a screw hole (2a-1) into which the screw portion of the mounting screw (4) is inserted and screwed.
And a threaded portion (5a) having a screw threaded around the threaded hole (1a-1) of the upper case (1) and a screw hole (2a-
It has a diameter smaller than the inner diameter of 1), and the length such that the tip surface abuts the bottom surface of the screw hole (2a-1) when the screw part (5a) is engaged with the screw hole (1a-1) and screwed together. A screw pin (5), which comprises a shaft portion (5b) having
Screw the screw part (5a) of the lower case into the screw hole (1a-1) of the upper case (1), and bring the tip of the shaft part (5b) into contact with the bottom of the screw hole (2a-1) of the lower case (2). , A screwdriver is used to release the close contact between the upper case and the lower case via the packing, which is achieved by an opening structure of the close case.

[Action]

A screw hole is provided in the mounting case hole of the upper case, and a screw pin that abuts the bottom surface of the screw hole of the lower case is screwed in and screwed into the screw hole. As a result, the upper case and the lower case, which are in close contact with each other, can be separated and pushed open by the jack-up action by screwing the screw portion of the screw pin and the screw hole of the mounting fool hole.

〔Example〕

Hereinafter, the gist of the present invention will be described in detail based on the embodiments shown in the drawings.

As shown in the perspective view of FIG. 1 and the side sectional view of the main part of FIG. 2, a rectangular upper case 1 made of synthetic resin material and provided with mounting holes 1a at four corners of the periphery, and the mounting case. A rubber packing 3 such as neoprene is inserted between a rectangular lower case 2 having a screw hole 2a-1 corresponding to the fool hole 1a (an embedded nut 2a is insert-molded at the time of molding in advance), and a mounting screw 4 is used. The open structure of the close case, which is airtightly connected, has a mounting hole 1a for the upper case 1,
That is, the screw hole 1a-1 is screwed into the counterbore for sinking the screw head, and the screw portion 5a screwed into the screw hole 1a-1 and the lower case 2
The screw pin 5 is composed of a shaft portion 5b which is inserted through the inner diameter of the screw hole 2a-1. The length of the shaft portion 5b of the screw pin 5 is such that when the screw portion 5a engages with the screw hole 1a-1 of the upper case 1, the tip end surface of the shaft portion 5b corresponds to the screw hole 2a-1 of the lower case 2. Make the size to hit the bottom. On the end face of the screw part 5a, a screwdriver groove 5a-1
Open.

When opening the upper case 1, after removing the mounting screw 4, as shown in the side sectional view of the main part of FIG. 3 (a), (b),
In the diagram (a) of the figure, the screw portion 5a of the screw pin 5 is screwed into the screw hole 1a-1 of the upper case 1 with the screwdriver 6, and the tip end surface of the shaft portion 5b is set to the bottom surface of the screw hole 2a-1 of the lower case 2. Strike. Then, in FIG. 3B, the screw pin 5 is further screwed to jack up to push the upper case 1 into the gap G and open it.

In this way, a screw hole is provided in the mounting case hole of the upper case 1,
By providing a screw pin consisting of a screw part that is screwed into this screw hole and a shaft part that is inserted into the root diameter of the screw hole of the lower case,
The screw pin is screwed into the screw hole of the upper case, the tip of the shaft is abutted against the bottom of the screw hole of the lower case, and the screw is further screwed in, causing a force to peel off the contact surface and separate the upper and lower cases. It can be opened.

In addition, the mounting case of the upper case described above is a stepped hole by making a spot facing in order to sink the screw head of the mounting screw, but it is not necessary to sink it, but with a straight straight hole, at least a screw length that can be jacked up. It suffices to provide a hole, and if the screw hole including the above-mentioned embodiment is a molded product of a synthetic resin material, it is desirable that the embedded nut is insert-molded in the same manner as the lower case so that the screw strength can withstand jack-up. .

[Effect of device]

As described above in detail, according to the present invention, the screw pin can be easily opened by screwing the screw pin into the screw hole of the upper case, and the work such as maintenance and inspection can be made efficient, and the case, the rubber packing, etc. Can be reused without damaging and can improve the economical efficiency, which is extremely useful in practice.

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment according to the present invention, FIG. 2 is a side sectional view of an essential part of FIG. 1, and FIGS. 3 (a) and 3 (b) show a state in which the upper case of FIG. 2 is opened. FIG. 4 is a cross-sectional view of an essential part side, FIG. 4 is a perspective view of a conventional technique, and FIG. 5 is a cross-sectional view of an essential part of FIG. In the figure, 1 is an upper case, 1a is a mounting hole, 1a-1 is a screw hole, 2a is a lower case, 2a is an embedded nut, 2a-1 is a screw hole, 4 is a mounting screw, 5 is a screw pin, and 5a. Indicates a screw portion, and 5b indicates a shaft portion.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Kenji Shinohara Kenji Shinohara 1015 Kamiodanaka, Nakahara-ku, Kawasaki-shi, Kanagawa Within Fujitsu Limited (56) References: 1-87584 (JP, U)

Claims (1)

[Scope of utility model registration request] 1. An upper case (1) having a mounting hole (1a) for a mounting screw (4) and a screw hole (1a-1) at least in the upper part of the mounting hole, and a thread portion of the mounting screw (4) is inserted. ， Screw hole to be screwed (2a
-1) and a screw part (5a) having a screw threaded around the screw hole (1a-1) of the lower case (2) and the upper case (1), and a screw hole (2a-1) in the lower part. Has a smaller diameter than the inner diameter of the screw part (5a), and the screw hole (1a-
It consists of a combination of a screw pin (5) consisting of a shaft part (5b) having a length such that the front end surface abuts the bottom surface of the screw hole (2a-1) when engaged with and screwed into 1). The screw part (5a) of (5) is screwed into the screw hole (1a-1) of the upper case (1), and the tip surface of the shaft part (5b) is the bottom surface of the screw hole (2a-1) of the lower case (2). Opening structure of the close case, characterized in that the close contact between the upper case and the lower case is released through the packing by abutting against and screwing.