JPH0559885U - Waterproof packing - Google Patents

Abstract

(57) [Summary] [Purpose] Not only can the attachment work be performed easily, but it should also be possible to attach it properly and stably. [Structure] A waterproof packing 1 comprises a rubber ring (elastic body) 4 having a substantially elliptical cross section with a metal wire (core) 5 embedded in the center. The waterproof packing 1 is fitted and mounted in an annular groove 6 formed on the mating surface of the back case 3, and a portion of the annular groove 6 protruding from the upper opening is pressed against the mating surface of the front case 2. Then, when the waterproof packing 1 is molded into an outer shape that matches the annular groove 6 of the back case 3 by using, for example, a forming machine, the metal wire 5 inside is in a free state and follows the molding die. The waterproof packing 1 can be mounted in the groove 6 with one touch, and the waterproof packing 1 is less likely to be displaced.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a waterproof packing that is mounted on a mating surface of a case for waterproofing the inside of the case for a device in which parts are housed in a case of at least two-part structure.

[0002]

[Prior Art]

 For example, in electronic devices such as cordless phones and mobile phones, waterproof cases have been used so that the internal electronic components will not be adversely affected even if they are used in situations where water droplets adhere. ..

Therefore, in a conventional electronic device of this type, a waterproof packing is attached to a mating surface of a case having a two-part structure. This waterproof packing uses an O-ring made of an elastic material such as rubber. Such a waterproof packing is generally fitted and mounted in an annular groove formed in the mating surface of one case, and a portion protruding from the annular groove is pressed against the mating surface of the other case. ..

[0004]

[Problems to be solved by the device]

 By the way, since the above-mentioned conventional waterproof packing always has an annular shape due to the elastic return force in the free state, the mounting work on the annular groove such as the case is relatively troublesome and it may take more time than necessary. be pointed out. Even if the waterproof packing is attached, the waterproof packing is likely to be misaligned or twisted when the case having the two-divided structure is integrated, which may result in poor sealing.

The present invention was devised to solve such a problem, and an object thereof is not only to perform a mounting operation simply, but also to enable stable mounting in an appropriate state.

[0006]

[Means for Solving the Problems]

 In order to achieve such an object, the present invention relates to a device in which parts are housed in a case of at least two-part structure, which is mounted on a mating surface of the case in order to waterproof the inside of the case. The packing has the following configuration.

The waterproof packing of the present invention is characterized in that a core made of a plastic member is embedded inside an elastic body.

[0008]

[Action]

 In the waterproof packing of the present invention, for example, when forming is performed using a mold having an annular groove of a predetermined shape, the core made of a plastic member inside is deformed along the mold to maintain its shape. As a result, the elastic body also has a shape that matches the shape of the core.

Therefore, if the waterproof packing is formed by forming according to the shape of the mounting target, the mounting work can be easily performed. Further, after forming, the elastic packing does not return to its original shape due to the elastic force of the elastic body, so that the waterproof packing will not be displaced or twisted when the case of the two-divided structure to be mounted is integrated.

[0010]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

1 and 2 show an embodiment of the waterproof packing of the present invention. FIG. 1 illustrates a case where the waterproof packing 1 is mounted between the front case 2 and the back case 3 of the cordless telephone.

The waterproof packing 1 is formed by embedding a metal wire (core made of a plastic member) 5 in the center of the inside of a rubber ring (elastic body) 4 having a substantially elliptical cross section. It is fitted and mounted in the formed annular groove 6. Needless to say, the waterproof packing 1 is set to have a size so as to project from the upper opening of the annular groove 6, and the projecting portion is pressed against the flat mating surface of the front case 2.

The front side case 2 and the back side case 3 are integrated by hooking a plurality of locking claws 7 provided on the front side case 2 into a plurality of recesses 8 provided on the back side case 3, and a screw 9 is formed. It is fixed by tightening. Illustrations of the electronic components and the like built in the pair of front and back cases 2 and 3 are omitted.

By the way, the waterproof packing 1 is manufactured as follows. First, with an extrusion molding machine, a rubber wire 4 with a metal wire 5 embedded in the center thereof is extruded into a linear shape, and is cut into a predetermined length. Both end faces of this are abutted and joined with, for example, an adhesive to form a ring. After that, the outer shape of the waterproof packing 1 is formed by a forming machine so as to match the annular groove 6 of the back case 3. After the forming, the metal wire 5 maintains its shape.

If the waterproof packing 1 is formed by molding according to the shape of the annular groove 6 of the back case 3 as the mounting target as in this embodiment, the mounting work can be performed with one touch. Further, since the waterproof packing 1 after forming is unable to return to the shape before forming by only the elastic restoring force of the rubber ring 4 due to the strength of the metal wire 5, the front case 2 and the back case 3 are integrated. It will not be misaligned or twisted when it is converted.

The waterproof packing 1 of the present invention is not limited to the above-mentioned embodiment, and includes the following. For example, as shown in FIG. 3, a structure in which the metal wire 5 is cut at several locations inside the rubber ring 4 and intermittently embedded, or as shown in FIG. A structure in which rubber plates 4A and 4B are attached to the upper and lower surfaces of a metal plate 5A can be considered. Further, the waterproof packing 1 can be manufactured by insert molding, for example, in addition to the manufacturing method described above.

[0017]

[Effects of the Invention] As described above, the waterproof packing of the present invention is formed by forming using, for example, a mold having an annular groove of a predetermined shape, so that the core made of the plastic member inside is formed in the mold. The elastic body also follows the shape of the core.

Therefore, if the waterproof packing of the present invention is formed by forming according to the shape of the object to be mounted, the mounting operation can be performed much easier than in the conventional case. In addition, the waterproof packing after forming cannot return to the shape before forming by only the elastic restoring force of the elastic body, so it will not be misaligned or twisted when assembling the case of the two-part structure to be mounted. It is not necessary, and the sealing condition is good.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of the waterproof packing of the present invention.

FIG. 2 is a vertical cross-sectional view showing a mounted state of the waterproof packing of FIG.

FIG. 3 is a perspective view showing another embodiment of the waterproof packing of the present invention.

FIG. 4 is a perspective view showing still another embodiment of the waterproof packing of the present invention.

[Explanation of symbols]

1 waterproof packing 2 front case 3 back case 4 rubber ring 5 metal wire 6 back case annular groove

Claims (1)

[Scope of utility model registration request] 1. A waterproof packing, which is mounted on a mating surface of a case for waterproofing the inside of the case for a device having parts housed in a case of at least two-part structure, wherein the elastic packing is inside the elastic body. A waterproof packing, in which a core made of a plastic member is embedded.