JPH0236648A - Water-proof type handset - Google Patents

Abstract

PURPOSE:To ensure sealing in an excellent way over the entire circumference by tightening a screw to a screw hole of a bracket arranged in the center of the inside of one case so as to clip strongly the gasket interposed both cases. CONSTITUTION:In the case of coupling the center of the upper case 3 and the lower case 4 in a longitudinal direction by means of a screw 19, the screw 19 is inserted to the center of one case in a longitudinal direction externally and the screw 19 is screwed into a screw hole 51 provided on a bracket 48 whose both ends are engaged to the inner wall face of the other case. Thus, the centers of both cases in the longitudinal direction are coupled strongly and the gasket 28 interposed between joint end faces of both cases is clipped by strong force. Thus, the seal performance of the center in the longitudinal direction is improved.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a waterproof handset.

[Conventional technology]

Conventionally, the handset/receiver casing of a telephone handset has been made of two parts, an upper case and a lower case, made of synthetic resin, as disclosed in Japanese Utility Model Application Publication No. 62-109547 for ease of assembly and maintenance. These two cases are integrally connected to each other by suitable connecting means such as a set screw or engagement between an engaging piece and an engaging part, and a transmitter (microphone) is attached to one longitudinal end of the inside thereof. The receiver (speaker) is housed at the other end, and the cord is pulled out to the outside.
In the case of the above-mentioned Japanese Patent Publication No. 2003-121033, a calling circuit, a control circuit board, a dial unit, a ringing volume changeover switch, a receiving volume changeover switch, a hook switch, etc. are incorporated into the grip portion of the handset case.

[Problem to be solved by the invention]

By the way, with the diversification of lifestyles, for example, telephones are sometimes brought into or installed inside bathrooms, and there is therefore a demand for waterproof handsets. In that case, it is conceivable to insert a waterproof member made of rubber or the like between the joints of the upper case and lower case, but in order to achieve a reliable waterproof function over the entire circumference of both cases, it is especially important to It is necessary to firmly connect the central part of the

In other words, normally the upper case and lower case are joined at three points: both ends and the center, but in one-piece telephones, the dial unit is placed in the center, and sufficient space is secured on both sides of the dial unit. In a transmission/reception housing with an unacceptably small width, the central portion cannot be directly connected, and the waterproof performance of the central portion deteriorates. Therefore, a major issue is how to connect the central portion.

The present invention solves the above-mentioned problems, allows the longitudinal central parts of the upper case and the lower case to be integrally joined without increasing the width dimension with a simple configuration, and connects the joint end surfaces of both cases with a gasket. The object of the present invention is to provide a waterproof handset that can be well and reliably sealed all around.

[Ninth means to solve the problem]

To achieve the above object, the present invention includes a transmitter/receiver housing consisting of an upper case and a lower case that are formed into two parts (upper and lower) and integrally connected by a plurality of screws,
A gasket made of an elastic material is inserted between the joint end surfaces of both cases, a dial unit installation hole is opened in the center of either the upper case or the lower case, and the dial unit installation hole is inserted into the dial unit installation hole. is fitted and fixed from inside the case, and a bracket is placed in the center of the interior of the one case, both ends of which are locked to the inner wall surface of the one case, and the screw holes provided at both ends of this bracket are fitted with the bracket. The tip of the screw connecting the longitudinal center portions of both cases is screwed in from the other case side.

[Effect]

In the present invention, a screw provided from the outside in the longitudinal center of the other case is screwed into a screw hole of a bracket placed in the center of the interior of one case, and when the screw is tightened, the one case is attached to the bracket. The gasket is pulled toward the other case, and both cases are inserted between the cases and strongly clamp the next gasket.

〔Example〕

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

FIG. 1 is a cross-sectional view showing an embodiment of a waterproof handset according to the present invention, and FIG. 2 is an enlarged cross-sectional view taken along the line ■--■ in FIG.

In these figures, reference numeral 1 denotes a handset having a handset housing 2 that has an external shape similar to that of a square handset of a general telephone, and is a one-piece type together with a stand (not shown) on which the handset 1 is placed. Configuring the phone.

The handset/receiver housing 2 is composed of an upper case 3 and a lower case 4, which are formed into two parts made of synthetic resin and integrally connected by screws as a connecting means to be described later, and one longitudinal end of the lower case 4 is connected to the handset 5. The other end in the longitudinal direction forms a transmitting section 8 that houses a transmitter 7. Further, small sound holes 9 and 10 are provided on the surfaces of the receiving part 6 and the speaking part 8, respectively, and these sound holes 9 and 10 are respectively closed from the inside of the lower case 4 by a waterproof sheet 11. The waterproof sheet 11 is made of a porous sheet made of fluorine-based material, polyethylene, ultra-high molecular weight polyethylene, acrylic material, etc.
It has high waterproofness and breathability.

The central part of the handset housing 2, that is, the part between the receiver part 6 and the transmitter part 8 forms a grip part 12, and therein is a printed circuit forming a communication circuit network and a control circuit network. Substrate 13. Incorporates push button dial unit '14 etc.
ing. The printing time Ml [13 is silicone rubber 15
A waterproof structure is obtained by molding the upper case 3. It is fixed to a plurality of board extension parts 17 protruding from the inner surface of the upper case 3 with a plurality of setscrews 16. The push button dial unit 14 is provided in the longitudinal center of the lower case 4 and is connected to the next dial unit installation hole 1.
A dial mounting seat 20 is fitted into the case 4 from the inside of the case 8, and its longitudinal ends are provided at the peripheral edge of the dial unit installation hole 18 on the inner surface of the lower case 4 with a plurality of setscrews 19. Fixed. In this case, the pushbutton dial unit 14 consists of a pushbutton dial 21, a rubber receiver 22 into which the pushbutton dial 21 is incorporated, and a key top rubber 23 that commonly covers the surfaces of both of these members. is close to the dial mounting seat 20 at a distance of n1 dial unit installation hole 1
8 waterproof. In addition, on the back side of the rubber receiver 22, there are a total of 8 bins 24, 4 on the left and 4 on both sides in the width direction.
are provided integrally protruding upward, and their tips abut or closely oppose both ends of the inner surface width direction of the upper case 3, and a compression coil spring 25 is attached to the bin 24.
is attached in a compressed state, and the front-mounted button dial unit 14 is pressed and biased outward, and the key top rubber 23 is pressed against the dial mounting seat 20, and the center of the push button dial unit 14 is pressed when the dial is operated. This prevents the parts from deflecting inward. Such a configuration is an effective means when the width of the transmitter/receiver housing 2 is small and both ends of the dial unit 140 in the width direction cannot be directly fixed to the dial mounting seat 20 with screws.

Now, a gasket 28 is inserted between the opposing joint end surfaces of the upper case 3 and lower case 4.
Waterproofing between side cases 3 and 4 is measured from K. The gasket 2B is made of an elastic material such as rubber as shown in FIGS. 3 and 4.
By being formed in the shape shown in the figure, the base 29 has an H-shaped cross-sectional shape over the entire circumference, and is integrally connected to the upper end of the outer piece 29A of the base 29, and is inclined at an appropriate angle inwardly. The joint end portions of the upper case 3 and the lower case 4 are respectively fitted into fitting grooves 31 and 32 provided on the upper and lower sides of the base portion 29.

A locking piece 33 is integrally provided downwardly at the upper end of the inner surface of each long side portion of the inclined portion 30, and the locking piece 33 is attached to both shoulders of the upper case 3, that is, in the surface width direction. They are inserted and locked into locking grooves 34 (see FIG. 2) formed at both end portions, respectively, thereby bringing the inclined portions 30 into close contact with the side surfaces of both rows of the upper case 3.

Furthermore, a cylindrical cord lead-out part 36 through which a cord 35 is inserted projects integrally at the center of one end surface in the longitudinal direction of the gasket 28. A cord extraction hole 37 (FIG. 1) formed between the joint end surfaces is sealed.

Referring again to FIG. 1, a total of four screw attachment portions 38, one pair each on the left and right sides, are integrally provided on both ends of the inner surface of the lower case 4 in the longitudinal direction so as to project upward. These screw mounting parts are 38V! The lower case 40 is formed into a cylindrical shape open to the surface, and has a screw mounting hole 40 formed at the center of the upper end surface, and a cylindrical waterproof rubber 41 is fitted into the screw mounting hole 40. On the other hand, on the inner surface of the upper case 3, there is a protrusion 4 having a screw hole (not shown) on the tip surface.
2 are integrally provided in a protruding manner corresponding to each screw attachment portion 38 of the lower case 4, and when the upper case 3 and the lower case 4 are coupled via the gasket 2B, the tip surfaces of the screw attachment portions 38 and the protrusions 42 touch each other. Then, insert the set screw 43 from the outside of the lower case 4 into the screw mounting hole 40 of the screw mounting seat 38 via the waterproof rubber 41,
When screwed into the screw hole of the protrusion 42, the upper case 3
and both longitudinal ends of the lower case 4 are integrally coupled. In addition, the longitudinal center portions of the upper case 3 and lower case 4 are provided with two screws 45 (one at each side end).
(Fig. 2). Therefore, a screw mounting notch 46 is formed in the longitudinal center of both shoulders on the surface of the upper case 3, and a screw mounting hole 4 is formed in the bottom surface of the upper case 3 through which the screw 45 is inserted through the gasket 50 upwardly.
7 is formed. On the other hand, inside the lower case 4, a bracket 4B is disposed at the center in the longitudinal direction corresponding to the screw 45, and this bracket 4B is positioned above the push button dial unit 14 at an appropriate interval,
Both ends thereof are recessed in the inner wall surface of both ends in the width direction of the lower case 4! 1. Insert and lock into the locking recess 49
The tips of the screws 45 are screwed into screw holes 51 (FIG. 5) formed at both ends.

Therefore, when the screw 45 is tightened, the bracket 48 is pulled up, and the central part of the lower case 4 is strongly pressed against the central part of the upper case 3 via the gasket 28, resulting in the longitudinal center of both cases 3. The sealing properties of the parts are ensured. Further, the bracket 48 has both ends connected to the locking recesses 49 so as to spread out both side walls of the lower case 4.
This corrects molding distortion during molding. That is, when the lower case 4 is molded, the center portion of both side walls in the longitudinal direction is bent inward the most, and this remains as molding distortion. However, if the center portions of the both side walls are stretched with the brackets 48 as in the above embodiment, molding distortion can be reduced. It is something that can be corrected. The head of the screw 45 and the gasket 50 are located in the screw mounting notch 46 of the upper case 3, but since these are covered by the gasket 28, the appearance of the transmitter/receiver housing 2 is not visible. It will not be lowered.

Although the above embodiment shows an example in which the dial unit installation hole 1B is provided in the lower case 4 and the pushbutton dial unit 24 is fitted therein, the pushbutton dial unit 14 may be incorporated in the upper case 3 side. Of course.

[Effects of the Invention] As explained above, in the waterproof handset according to the present invention, when connecting the longitudinal center portions of the upper case and the lower case with screws, the screw is inserted into the longitudinal center portion of one case from the outside. However, a bracket having both ends locked to the inner wall surface of the other case is disposed at the center in the longitudinal direction inside the other case, and the screw is screwed into the screw hole provided in the bracket. , the longitudinal center portions of both cases can be firmly connected, and the gasket inserted between the joint end surfaces of both cases can then be clamped with great force, improving the sealing performance of the longitudinal center portion. This is especially suitable for use in handsets where it is not possible to secure sufficient space for forming screw holes on both sides of the dial unit inside the case.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing an embodiment of the waterproof handset according to the present invention, Fig. 2 is an enlarged sectional view taken along the line ■-■ in Fig. 1, Fig. 3 is a perspective view of the gasket, and Fig. 4 is FIG. 3 is a sectional view taken along line IVIV, and FIG. 5 is a perspective view of the bracket. 2...Transmitter/receiver housing, 3...Upper case, 4
...Lower case, 14..Push button dial unit, 18..Dial unit installation hole, 19.
... Set screw, 20 ... Dial mounting seat, 25.
... Compression coil spring, 28 ... Gasket, 43.45 ... Screw, 48 ... Bracket,
49... Locking recess, 51... Screw hole. Patent applicant: Tamura Electric Manufacturing Co., Ltd. Ube Trading Co., Ltd.

Claims (1)

[Claims] A transmitter/receiver housing is provided with an upper case and a lower case that are formed into two upper and lower halves and are integrally connected by a plurality of screws, and a gasket made of an elastic material is inserted between the joint end surfaces of these two cases, A dial unit installation hole is provided in the center of either the upper case or the lower case, and the dial unit is fitted and fixed into the dial unit installation hole from the inside of the case, and A bracket is arranged at which both ends are fixed to the inner wall surface of one of the cases, and the tips of the screws connecting the longitudinal centers of the two cases are inserted into the screw holes provided at both ends of the bracket. A waterproof handset characterized by being screwed in from the case side.