JPH0128475Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a case structure that has a simple configuration, is easy to assemble, and has high waterproof and dustproof properties.

Conventionally, as shown in FIGS. 1 and 2, a waterproof gasket 3 is disposed on the step edge 2 of the lower case 1, and is pressed down with the edge 5 of the upper case 4 to connect the upper case 4 and the lower case. It was fixed by being sandwiched between it and the side case 1.

However, since there is no positioning guide for the gasket 3, and because the gasket 3 is simply placed on the step edge 2, the gasket 3 is displaced as shown in FIG. 2, resulting in a low waterproofing effect. Furthermore, even if an adhesive is used, there is a risk that the adhesive may come off. Furthermore, if the upper case 4 and lower case 1 are misaligned, the airtightness provided by the packing 3 will be reduced. Also the third
As shown in the figure, the entire periphery of the gasket 3A is formed to have a U-shaped cross section in order to prevent it from slipping, but this has the drawback that it is difficult to fit onto the edge 6 of the lower case 1 due to twisting. Furthermore, there is a risk that airtightness will be lost due to deformation of the packing, and if the upper and lower cases are misaligned, the reduction in airtightness will become even worse.

Furthermore, since the rubber gasket 3A is stretched during the process of fitting the gasket 3A, the stretched portion is brought together at the end, making it impossible to fit the gasket 3A, and the gasket 3A has to be re-inserted.

On the other hand, when fixing the component support body 7 in the lower case 1, it has to be attached to several supports 8 one by one using screws 9, which has the disadvantage of increasing assembly man-hours and parts, resulting in high costs. Ta. The present invention has been devised in view of these points, and its contents will be explained below with reference to the illustrated embodiments.

Reference numeral 10 denotes a lower case body from which a support column 11 is protruded, and a screw hole 12 is formed inside the narrow diameter tip 15 of the support column 11. Reference numeral 13 denotes a stepped portion of the support column 11, and the component support 14 is placed on the stepped portion 13 through the through hole 14A of the component support 14. Numeral 16 is a threaded portion provided on the outside of the narrow-diameter tip portion 15 of the support column 11, and a nut 17 is screwed into the threaded portion 16 to fix the component support 14. Reference numeral 18 denotes a holding leg of the component support 14, and when the component support 14 is fixed to the column 11, the holding leg 1
The end portion 19 of the lower case body 10 is configured to abut against the bottom surface 20 of the lower case body 10.

21 is a rubber gasket forming an annular frame. Reference numeral 22 denotes holding leg insertion holes provided in the packing 21, which are provided in a number corresponding to the number of holding legs 18 of the component support body 14 and at corresponding positions.

This packing 21 mainly consists of the upper rising portion 23.
It is composed of a lower descending portion 24, a protruding collar portion 25, and the aforementioned holding leg insertion hole 22.

Thus, the upper surface 29 of the protruding flange 25 of the packing 21 is in pressure contact with the edge 30 of the upper case body 26, and the lower surface 31 is in pressure contact with the edge 32 of the lower case body 10, improving airtightness. There is. Further, the upper rising portion 23 of the packing 21 comes into contact with the inner wall surface 27 of the upper case body 26 and has the function of guiding the closing of the lid and improving airtightness, and the lower falling portion 24 is in contact with the inner wall surface 27 of the upper case body 26. It comes into contact with the inner wall surface 28 of the lower case body 10 and guides the assembly with the lower case body 10, and also has the function of improving airtightness.

Therefore, even if the airtightness between the upper surface 29 and the edge 30 and between the lower surface 31 and the edge 32 is reduced, the airtightness can be maintained at the side surfaces.

Numeral 33 is a through hole bored in the upper case body 26, through which a screw 34 is inserted and screwed into the screw hole 12 of the support column 11, thereby tightening and fixing the upper case body 26 to the lower case body 10.

Next, the assembly sequence of the present invention having the above configuration will be explained.

First, the packing 21 is attached to the holding leg 18 of the component support 14 through the holding leg insertion hole 22, and then the component support 14 is fitted into the small diameter tip 15 of the column 11 through the through hole 14A. and place it on the receiving stage part 13.

Next, the nut 17 is screwed onto the threaded portion 16. At that time, the packing 21 is attached to the holding leg 1 of the component support 14.
8 is positioned parallel to the edge 32 of the outer case body 10.

Next, the upper case body 26 is attached to the lower case body 10.
If the upper case body 26 and the lower case body 10 are screwed together with the screws 34, the upper case body 26 and the lower case body 10 become integral.

At this time, the packing 21 is pressed outward by the holding legs 18, and the upper rising portion 23 is pressed against the upper case body 2.
6 is in pressure contact with the inner wall surface 27, and the lower falling portion 24
is in pressure contact with the inner wall surface 28 of the lower case body 10 to maintain airtightness, and the edge 30 of the upper case body 26 bites into the upper surface 29 of the protruding flange 25, so that the lower surface 31
The edge 32 of the lower case body 10 bites into the lower case body 10 to further improve airtightness.

Moreover, the component support body 14 and the case bodies 10, 26
This has the advantage that the integral fixation with the holder can be done in one place, which reduces the number of parts and the number of assembly steps.

In this embodiment, the support 11 is provided at only one location, but it is not limited to this one location.
They may be provided at one or more locations as appropriate.

Therefore, the present invention has the structure and function as described above, and in particular, a plurality of holding legs protruding from each periphery of the component support body are inserted into the holding leg insertion holes of the packing to hold the packing. Therefore, compared to conventional technology, the packing is less likely to come off, fall off, get twisted,
The packing is securely held by the holding legs without fear of it slipping or moving. In addition, since the packing is pressed and held from three sides between the holding legs that are inserted through the holding legs, the lower case body, and the upper case body, the holding legs function as a receiving board for the packing, so that the upper case body and the lower Even if the airtightness between the upper case body and the lower case body should deteriorate, the airtightness can be maintained on the side surfaces via the holding legs without any fear of any misalignment between the upper case body and the lower case body. Furthermore, since the component support body and both case bodies can be integrally fixed in one place via the central support, the number of parts and assembly man-hours can be reduced, and the pressing force on the gaskets sandwiched around the periphery can be reduced in three directions. It has great effects such as uniform dispersion throughout the area.

[Brief explanation of the drawing]

1 to 3 are explanatory diagrams of the prior art, FIG. 4 is a vertical cross-sectional view of essential parts of the present invention, and FIG. 5 is an exploded perspective view of the present invention. FIG. 6 is a partially cutaway perspective view showing the main part of the holding leg insertion hole. 10...Lower case body, 14...Component support body,
18... Holding leg, 26... Upper case body.

Claims (1)

[Scope of utility model registration request] When the center of the component support body 14 is fixed to the pillar 11 protruding from the center of the lower case body 10, a plurality of holding legs 18 protruding downward from each periphery of the component support body 14 are fixed. The end portion 19 thereof is formed so as to come into contact with the bottom surface 20 of the lower case body 10, and a plurality of holding leg insertion holes 22 are formed in a separately provided gasket 21 formed on the annular frame body so as to face the holding leg 18. When the holding leg 18 is inserted into the holding leg insertion hole 22 to freely hold the gasket 21 and the upper case body 26 is attached to the lower case body 10 via the support column 11. , the protruding flange 25 of the gasket 21 is vertically sandwiched between the edge 32 of the lower case body 10 and the edge 30 of the upper case body 26, and the upper rising portion 23 of the gasket 21 is
is held between the edge 30 and the holding legs 18 on the left and right sides,
In addition, the lower falling portion 24 of the packing 21 is sandwiched between the edge portion 32 and the holding leg 18 on the left and right sides.
Structure of dustproof case.