JPH084764Y2 - Button telephone - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION -Industrial field- The present invention relates to a button telephone structure, and more particularly to a button telephone structure to which a liquid crystal display can be attached if necessary.

-Prior art-As is well known, in key telephones used in business establishments, etc., a liquid crystal display is required to be incorporated in order to display data such as the current time, dialed number, communication time, and call charge. There is a case.

In such a case, conventionally, a telephone case used for a button telephone equipped with a liquid crystal display and a telephone case for a button telephone not using the liquid crystal display are separately prepared, and a telephone for each application is manufactured in the manufacturing process of the telephone. They are made differently.

-Problems to be solved by the invention-However, in the case of such a telephone structure, in the case where it is later requested to equip the liquid crystal display device after the installation of the key telephone, it is necessary to respond to this request. In addition to the need to replace the entire button telephone, it is necessary to individually manufacture a die for an expensive telephone case depending on the presence or absence of a liquid crystal display, which makes the manufacturing cost very high. Also, the reason why the manufacturing cost is high is that it is necessary to set up a completely different manufacturing line depending on the presence or absence of the liquid crystal display, and the complexity of the manufacturing process of the button telephone limits the price reduction by mass production. Is occurring.

In addition, when a liquid crystal display is used, since it is electrically connected to the telephone circuit board by connector connection, the number of parts is increased and the cost of the electrical connection portion is relatively high.

In view of the problems of the conventional button telephone structure as described above, an object of the present invention is to provide a liquid crystal display later, and use a specific telephone case regardless of the presence or absence of the liquid crystal display. The purpose is to obtain an inexpensive button telephone that can be manufactured and has a small number of parts.

-Means for Solving the Problems-In order to achieve this object, the present invention provides a surface of a telephone circuit board in which an open window reaching the inside of the telephone case is formed on the surface of the telephone case and incorporated into the inside of the telephone case. Is exposed inside the open window, and a contact portion of an interconnect rubber internally connected to the liquid crystal display is projected on the lower surface of the liquid crystal display detachably incorporated in the open window, and the liquid crystal display is attached to a telephone case. The present invention proposes a button telephone configured so that the contact portion and the printed conductor of the telephone circuit board are brought into pressure contact with each other by being elastically engaged by elastically engaging means with the printed conductor of the telephone circuit board.

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

1 and 2, a telephone circuit board 2 to which functional elements (not shown) for controlling a button telephone is attached is conventionally incorporated in a telephone case 1 of a button telephone according to the present invention. Is the same as. An open window 4 is formed on the surface of the telephone case 1 so that a liquid crystal display 3 to be described later is detachably fixed. That is, the open window 4 reaches the inside of the telephone case 1 as shown in FIG. 1, and the surface of the telephone circuit board 2 corresponding to the open window 4 is electrically connected to the liquid crystal display 3. The printed conductor 2a to be exposed is exposed. Further, two pairs of fixing projections 5 formed integrally with the telephone case 1 are projected on the left and right side surfaces of the opening window 4, and these fixing projections 5 constitute the liquid crystal display 3 fitted in the opening window 4. Elastic claw 6a of the indicator cover 6
Are removably engaged.

The liquid crystal display 3 detachably attached to the open window 4 of the telephone case 1 described above is provided with a display cover 6 having a size corresponding to the rectangular open window 4 and is resin-molded in a frame shape. The display surface of the built-in liquid crystal cell 7 is exposed to the outside through the display window 6b of the cover 6. Also, the display cover 6
Elastic claws 6a that can be elastically engaged with the corresponding fixing projections 5 are integrally formed on the left and right side surfaces of the above in a downward protruding state.

In addition, the liquid crystal cell 7 is provided inside the display cover 6.
A circuit board 8 for supplying electricity to the circuit board 8 is incorporated, and as shown in FIG. 1, a circuit board 8 is formed with a frame-shaped interconnect rubber 9 interposed between the circuit board 8 and the liquid crystal cell 7. And the liquid crystal cell 7 is fixed inside the display cover 6 using the mounting screw 10. That is, the interconnect rubber 9 has a pair of contact portions 9a protruding downward on the left and right sides, and the lower surfaces of these contact portions 9a contact the printed conductor 2a of the telephone circuit board 2 and the circuit. A connector conductor 9b that is electrically connected to the conductor of the liquid crystal cell 7 is formed via the substrate 8, and is configured to be conductively connected by lamination pressure contact without using electrical parts such as a connection connector as a whole.

On the other hand, when manufacturing a button telephone that does not require the liquid crystal display 3, a shield cover 11 is provided on the open window 4 of the telephone case 1.
Is attached. Since the elastic cover 11a similar to the display cover 6 described above is integrally formed on the shield cover 11, when the shield cover 11 is fixed to the open window 4, the open window 4 is opened as shown by the phantom line in FIG. Are completely covered with the shielding cover 11.
Therefore, by displaying the brand name and the function on the surface of the shielding cover 11, the appearance of the key telephone can be maintained even when the liquid crystal display 3 is not used.

Since the button telephone according to the illustrated embodiment has the above-described structure, the button telephone using the liquid crystal display 3 and the button telephone not using the liquid crystal display 3 are the same if only one type of telephone case 1 is prepared. Can be manufactured in process. That is, whether or not it is a key telephone using the liquid crystal display 3 can be freely selected by assembling the liquid crystal display 3 in the final step or by assembling the shield cover 11. When the elastic claw 6a of is fixed to the fixing protrusion 5 of the telephone case 1, the contact portion 9a of the interconnect rubber 9 is pressed against the printed conductor 2a on the surface of the telephone circuit board 2.
Only by assembling the liquid crystal display 3 to the telephone case 1, the telephone circuit board 2 and the liquid crystal cell 7 can be electrically connected. Of course, if the shielding cover 11 is attached to the telephone case 1 instead of the liquid crystal display 3, a button telephone without the liquid crystal display 3 can be obtained. Since the manufacturing process of can be performed in the same process, the manufacturing process can be rationalized. Further, in the structure of the illustrated example, it is not necessary to prepare a plurality of types of telephone cases 1, the boiling of the product cost due to the preparation of a plurality of large molds can be prevented, and the mass production effect by the same process can be fixed by 5 minutes. Can be demonstrated.

In addition, after the installation of the key telephone, if the user or the like requests the liquid crystal display 3 to be assembled, the telephone case 1 is disassembled and the elastic nail is attached to the tip of the screw driver or the like.
Since the shield cover 11 can be easily removed by bending the 6a, the user's request can be determined simply by attaching the liquid crystal display 3 to the open window 4 of the telephone case 1 instead of the shield cover 11. Can be satisfied.

In addition, in the above-mentioned embodiment, the fixing structure of the open window 4 and the liquid crystal display device 3 is an example, and thus any of the well-known detachable fixing structure may be used.

-Effects of the Invention-As is apparent from the above description, according to the present invention, it is possible to provide a structure in which a liquid crystal display is used only by preparing one type of telephone case, and a structure in which a liquid crystal display is not used. Since it is possible to deal with this, it is possible to reduce the product cost and rationalize the manufacturing process by sharing the telephone case. Further, in the key telephone of the present invention, since the liquid crystal display can be freely incorporated with one touch even after the button telephone is installed, it is possible to add the liquid crystal display after the fact that it was impossible in the past.

Further, there is an advantage that conductive connection to the electric circuit board of the liquid crystal display can be realized at low cost without using electric parts such as a connector.

[Brief description of drawings]

1 is an enlarged cross-sectional view of the main part of the button telephone taken along the line II of FIG. 2, FIG. 2 is an exploded perspective view of the button telephone according to the present invention, and FIG. 3 is a line III-III of FIG. FIG. 4 is an enlarged cross-sectional view taken along the line, and FIG. 4 is an exploded perspective view corresponding to FIG. 1 ... Telephone case, 2 ... Telephone circuit board, 2a ... Printed conductor, 3 ... Liquid crystal display, 4 ... Open window, 5 ...
Fixed protrusion, 6 ... Display cover, 6a ... Elastic claw, 9 ...
Interconnect rubber, 11 …… Shielding cover.

Claims (1)

[Scope of utility model registration request] 1. An opening window reaching the inside of a telephone case is formed on the surface of the telephone case, and a surface of a telephone circuit board incorporated in the inside of the telephone case is exposed to the inside of the opening window and is attachable to and detachable from the opening window. The contact portion of the interconnect rubber internally connected to the liquid crystal display is projected on the lower surface of the liquid crystal display to be incorporated into the liquid crystal display, and the liquid crystal display is elastically engaged with the telephone case by the elastic engagement means to make the contact. And a printed conductor of the telephone circuit board, which are configured to be brought into conduction with each other by pressure contact.