JPH10242664A - Waterproof case - Google Patents

Abstract

PROBLEM TO BE SOLVED: To materialize low cost by constituting a waterproof case of a packing consisting of substance which possesses waterproofness and elasticity, sealing up and engaging with the guide groove of the case body, and a seal agent consisting of substance which possesses waterproofness, sticking fast to the case body and the cover. SOLUTION: A cable 3 is passed through a slit 14 into the hole 13 provided in a packing 12, and the packing 12 is buried in the guide groove 11 of the case body 10. Then, a cover 2 is put on the case body 10, and the cover 2 is screwed to the case body 10 by a screw 5. In this condition, the case body 10 and the cover 2 are sealed up at a contact face 10b, and also the guide groove 11 and the case 3 are sealed up through a packing 12, too, and the inside of the case body 10 constitutes a waterproof structure. In this case, for the seal agent 15, a relatively inexpensive one can be used. Accordingly, a waterproof case at low cost can be materialized.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waterproof case, and more particularly to a waterproof case for an electronic device which requires a cable to be drawn from the inside to the outside at a connection portion between a cover and a case body.

[0002]

2. Description of the Related Art FIG. 4 shows an example of a conventional waterproof case for an electronic device in which a cable needs to be drawn from the inside to the outside. In FIG. 4, the waterproof case includes a case body 1, a cover 2, a cable 3, a packing 4 made of a waterproof and elastic substance such as waterproof rubber, and screws 5.
Here, a guide groove 6 is provided on one side wall of the case main body 1. Further, the packing 4 is formed by integrally forming a ring portion 21 along a contact surface between the case main body 1 and the cover 2 and a filling portion 7 to be hermetically fitted into the guide groove 6.
A hole 8 is provided at the center of the filling portion 7 of the packing 4, and a slit 9 is provided from the hole 8 toward a connection portion with the ring portion 21. Screw holes 1a and 2a are provided at four corners of the case body 1 and the cover 2, respectively.

In such a configuration, an electronic device (not shown) is provided inside the case body 1 and a cable 3 is provided.
Is connected to this electronic device. Here, the cable 3 is passed through a hole 8 provided in the filling portion 7 of the packing 4 through a slit 9, and the packing 4 is placed on the case body 1 in this state. At this time, the filling portion 7 of the packing 4 is embedded in the guide groove 2 of the case main body 1. At this stage, the slit 9 is pressed from both sides to be in close contact, and the cable 3 and the hole 8, and the filling portion 7 of the packing 4 and the guide groove 6 are in close contact. Then, the cover 2 is placed on the upper surface of the case body 1, and the cover 2 is screwed to the case body 1 with screws 5.

In this state, the case body 1 and the cover 2 are sealed with the ring 21 of the packing 4 interposed therebetween. Further, the guide groove 6 and the cable 3 are also sealed with the filling portion 7 of the packing 4 interposed therebetween. As a result, the inside of the case body 1 is sealed.

[0005]

However, in the structure of the waterproof case described above, it is necessary to make a special packing according to the structure of the case body and the guide groove. The material cost was high and the price of the waterproof case was high.

An object of the present invention is to solve the above-mentioned problems, and to provide a low-cost waterproof case.

[0007]

In order to achieve the above object, a waterproof case according to the present invention comprises a cover, a case body provided with a guide groove for passing a cable through a side wall, and a case body passing the cable. A packing made of a substance having waterproofness and elasticity, which is hermetically sealed and fitted into the guide groove, and a substance provided between the case body and the cover and having a waterproof property to be in close contact with the case body and the cover. And a sealant comprising:

In the waterproof case according to the present invention, the sealant is provided between the packing and the guide groove.

Further, in the waterproof case according to the present invention, the sealant has an adhesive force.

With such a configuration, the waterproof case of the present invention can realize low cost.

[0011]

FIG. 1 shows an embodiment of a waterproof case for an electronic device according to the present invention, in which a cable needs to be drawn from the inside to the outside. In FIG. 1, the same symbols are given to the same or equivalent parts as in FIG.

In FIG. 1, the waterproof case includes a case body 10, a cover 2, a cable 3, a packing 12 made of a waterproof and elastic substance such as waterproof rubber, and screws 5. Here, a guide groove 11 is provided on one side wall of the case body 10. Further, the packing 12 is formed in a shape that hermetically seals and fits into the guide groove 11 of the case body 10. Here, the packing 12 has a hole 13 at the center.
Are provided, and a slit 14 is provided from the outer peripheral portion of the packing 12 toward the hole 13. The case body 10
The guide groove 1 is formed on the contact surface 10b of the upper surface of the side wall with the cover 2.
A sealant 15 made of a waterproof material such as silicone oil is applied so that the sealant 15 goes around with no gap except for the part. Although the contact surface 10b is formed in a flat shape in FIG. 1, the guide groove 11 is formed in a portion of the contact surface 10b where the sealant 15 is applied in order to improve the size of the sealant 15 on the contact surface 10b. An indentation of an appropriate depth may be provided so as to go around except for the part. Screw holes 10a and 2a are provided at four corners of the case body 10 and the cover 2, respectively.

In such a configuration, the case body 10
Is provided with an electronic device (not shown), and one end of the cable 3 is connected to the electronic device. Here, the cable 3 is passed through a hole 13 provided in the packing 12 through a slit 14, and in this state, the packing 12 is embedded in the guide groove 11 of the case body 10. At this stage, the slit 14 of the packing 12 is pressed from both sides to be in close contact, and the cable 3 and the hole 13 and the packing 12 and the guide groove 11 are in close contact. And put the cover 2 on the case body 10,
The cover 2 is screwed to the case body 10 with the screw 5.

In this state, the case body 10 and the cover 2 are hermetically sealed with the sealant 15 interposed therebetween at the contact surface 10b. Further, the guide groove 11 and the cable 3 are also sealed with the packing 12 interposed therebetween. As a result, the case body 10
The inside is sealed and becomes a waterproof structure.

In this case, a relatively inexpensive sealant 15 can be used, and since it is indefinite, it does not depend on the shape of the case body or the cover. Also, the packing 12 does not cover the entire contact surface 10b of the case body 10 and the cover 2, but may be an inexpensive general-purpose one that is fitted only in the guide groove 11, or a common one with another case. Can be used. Thereby, a low-cost waterproof case can be realized.

FIG. 2 shows another embodiment of the waterproof case of the present invention. 2, the same or equivalent parts as those in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted.

In FIG. 2, a sealant 16 is applied to a guide groove 11 of the case body 10. in this way,
The sealing agent 16 is applied not only to the contact surface 10b between the case body 10 and the cover 2 but also to the contact surface between the guide groove 11 and the packing 12, thereby increasing the hermeticity between the guide groove 11 and the packing 12. Thus, the waterproofness of the entire case can be increased. In this case, since the sealing agent 16 is not a main component for realizing waterproofness, it is not always necessary to strictly control the amount and the like, and a waterproof case with higher waterproofness can be easily realized. it can.

FIG. 3 shows still another embodiment of the waterproof case of the present invention. 3, the same or equivalent parts as those in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted.

In FIG. 3, the case body 17 and the cover 19 are not provided with screw holes. In addition, an adhesive sealant 20 such as a low-viscosity silicone adhesive is applied to the contact surface 17a of the case body 17 with the cover 19. Although the contact surface 17a is formed in a flat shape in FIG. 3, a guide groove 18 is formed on a portion of the contact surface 17a where the sealant 20 is applied in order to improve the size of the sealant 20 on the contact surface 17a. An indentation of an appropriate depth may be provided so as to go around except for the part.

In such a configuration, the case body 17
Is provided with an electronic device (not shown), and one end of the cable 3 is connected to the electronic device. Here, the cable 3 is inserted into the hole 13 of the packing 12 through the slit 14.
Then, in this state, the packing 12 is embedded in the guide groove 18 of the case main body 17. At this stage, the slit 14 of the packing 12 is pressed from both sides to be in close contact with each other, and the cable 3 and the hole 13 and the packing 12 and the guide groove 18 are in close contact with each other.
Then, the cover 19 is placed on the case body 17 and pressure is applied to bond the case body 17 and the cover 19 together. Note that a treatment such as heating is performed depending on the bonding condition of the sealant 20.

In this state, the contact surface 17a between the case body 17 and the cover 19 is bonded and sealed with the sealant 20 interposed therebetween. Further, the guide groove 18 and the cable 3 are also sealed with the packing 12 interposed therebetween. As a result, the case body 1
The inside of 7 is sealed.

In this case, since the sealant 20 has an adhesive force, there is no need to screw the case body 17 and the cover 19, and no screw is required, and the work time required for screwing can be reduced, and the cost is further reduced. Waterproof case can be realized.

[0023]

According to the waterproof case of the present invention, the contact surface between the case body and the cover is sealed with a sealant, and the guide groove portion for leading the cable from the inside of the case body to the outside is sealed with packing. An inexpensive waterproof case can be realized.

Further, by applying a sealant also to the guide groove portion, the airtightness can be further increased and the waterproofness can be increased.

Further, by using an adhesive sealant, material costs and work time can be reduced, and a more inexpensive waterproof case can be realized.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing one embodiment of a waterproof case of the present invention.

FIG. 2 is an exploded perspective view showing another embodiment of the waterproof case of the present invention.

FIG. 3 is an exploded perspective view showing still another embodiment of the waterproof case of the present invention.

FIG. 4 is an exploded perspective view showing a conventional waterproof case.

[Explanation of symbols]

 2 ... Cover 2a ... Screw hole 3 ... Cable 5 ... Screw 10 ... Case body 10a ... Screw hole 10b ... Contact surface 11 ... Guide groove 12 ... Packing 13 ... Hole 14 ... Slit 15 ... Sealant

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Yuichi Kushibi 2-26-10 Tenjin, Nagaokakyo-shi, Kyoto Inside Murata Manufacturing Co., Ltd. (72) Yoshiyuki Sonoda 2-26-10 Tenjin, Nagaokakyo-shi, Kyoto Stock Company Murata Manufacturing Co., Ltd. (72) Inventor Yuichi Shinomiya 2-26-10 Tenjin, Nagaokakyo-shi, Kyoto, Japan Inside Murata Manufacturing Co., Ltd. 72) Inventor Nobuhiko Suzuki 2-26-10 Tenjin, Nagaokakyo-shi, Kyoto Prefecture Murata Manufacturing Co., Ltd.

Claims (3)

[Claims] 1. A cover, a case body provided with a guide groove for passing a cable on a side wall, and a waterproof and elastic material which passes the cable and hermetically fits into the guide groove of the case body. A waterproof case, comprising: a packing provided between the case body and the cover; and a sealing agent made of a substance having a waterproof property to be in close contact with the case body and the cover. 2. The sealant according to claim 1, wherein the sealant is provided between the packing and the guide groove.
The waterproof case described in. 3. The waterproof case according to claim 1, wherein the sealant has an adhesive force.