JPH0724836Y2 - Key switch device for car telephone - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial Field of the Invention The present invention relates to a key switch device used for an automobile telephone.

2. Description of the Related Art Key Switch Device for Conventional Car Phone 5
Description will be made with reference to FIGS.

As shown in FIGS. 5 to 7, the key case 51 is formed by arranging a large number of operation holes 52 in a face plate vertically and horizontally, and a notch 53 is formed in one side of one long side of the side plate. Bosses 54 are provided at a plurality of positions, and screw holes 55 are formed in each boss 54. The printed board 56 has screw mounting holes 57 corresponding to the screw holes 55 of the bosses 54. The key sheet 58 for telephone numbers or the like is provided with a large number of short contacts 60 arranged vertically and horizontally on the back surface of the plastic sheet 59 so as to correspond to the operation holes 52, and surrounds each short contact 60 on the back surface of the plastic sheet 59. As described above, the spacer 61 is attached by adhesion or the like. The volume control key switch 62 has a plurality of (three in the illustrated example) two sets of contacts 64a and 64b arranged in two rows on one surface of a plastic sheet 63, and an end projecting portion 65 provided with a connecting portion 66. The plastic sheet 63 is bent so that the contacts 64a and 64b correspond to each other, and a spacer 67 is attached by adhesive or the like so as to surround the contacts 64a and 64b inside thereof. The printed circuit board 56 has a space in the center, contacts 68 corresponding to the respective short contacts 60 are provided, and a connection portion 69 corresponding to the connection portion 66 is provided. The rubber connector 70 is provided with copper foils electrically connected to each other on both sides. And the key sheet 58 is the key case 51
It is housed inside, and the protrusion 65 of the key switch 62 for volume adjustment
Is placed in the notch 53 together with the rubber connector 70, the printed board 56 is brought into contact with the key case 51 from the spacer 61 of the key sheet 58 and the back of the rubber connector 70, and the screw 71 is screwed from the screw mounting hole 57 of the printed board 56. Is attached by being screwed into a screw hole 55 of the boss 54 of the key case 51. In this state, the short contacts 60 of the key sheet 58 are connected to the printed circuit board 56.
A key switch for a telephone number or the like is configured corresponding to the contact 68 of the key switch 62, and a connecting portion 66 of the volume adjusting key switch 62 is connected to a connecting portion 69 of the printed board 56 via a rubber connector 70. As shown in FIG. 7, the seat 72 is attached to the outer surface of the face plate of the key case 51, and the tip of the operation button 73 connected by the seat 72 is inserted into the operation hole 52.

Therefore, when any operation button 73 is pressed, the short contact 60 is brought into contact with the contact 68 of the printed circuit board 56 due to elastic deformation of the plastic sheet 59 in the key sheet 58 for telephone numbers and the like, and when the operation button 73 is released, the plastic sheet is released.
The restoring elasticity of 59 allows the short contact 60 to be separated from the contact 68. Similarly, when an arbitrary portion of the volume adjusting key switch 62 is pressed, the contacts 64a and 64b are brought into contact with each other, and when released, they can be separated from each other.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in the above-mentioned conventional key switch device for an automobile telephone, a key switch for a telephone number or the like has a key sheet 58 having a short contact 60 and a contact 68 having a space in the center.
Are separately formed by the printed circuit board 56 having the above, and the key switch 62 for adjusting the volume is formed separately from the key switch for the telephone number and the like. Therefore, not only the structure becomes complicated, but also the assembling work becomes difficult and the quality becomes unstable.

The present invention solves such a conventional problem, and by constructing a key switch for a telephone number and the like and a key switch for adjusting the volume integrally, it is possible to simplify the structure and An object of the present invention is to provide a key switch device for an automobile telephone, which can be easily assembled and whose quality can be stabilized.

Means for Solving the Problems In order to achieve the above-mentioned object, the present invention provides a large number of contacts and their tangent lines on a plastic sheet, and the plastic sheet is folded to provide a key switch for telephone numbers and volume control. The key switch for use is integrally formed, and the integrated key switch is mounted inside the key case and the printed circuit board and electrically connected to the printed circuit board.

Therefore, according to the present invention, the key switch for the telephone number or the like and the key switch for adjusting the sound volume can be integrated into the key case and the printed circuit board as a single key switch.

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

1 to 4 show a key switch device for an automobile telephone according to an embodiment of the present invention. FIG. 1 is a perspective view, FIG. 2 is an exploded perspective view, and FIG. 3 is a partially cutaway side view. FIG. 4 is an enlarged cross-sectional view.

As shown in FIGS. 1 to 4, the key case 1 is formed by arranging a large number of operation holes 2 in a face plate vertically and horizontally, and a notch 3 is formed on one side of one long side of the side plate. Bosses 4 are provided at a plurality of locations, and screw holes 5 are formed in each boss 4. The printed board 6 has screw mounting holes 7 corresponding to the screw holes 5 of the bosses 4. A key switch 8 for a telephone number and the like and a key switch 9 for adjusting the volume are connected by a connecting portion 10 to form an integrated key switch. That is, the plastic sheets 11a and 11b for forming the key switch 8 for a telephone number or the like are continuously provided via the bent portion 11c, and each plastic sheet 11
Plastic sheets 12a and 12b for constructing the volume control key switch 9 are provided outside the a and 11b, respectively.
The plastic sheets 13a and 13b are connected in series. A large number of two sets of contacts 14a, 14b are arranged in a matrix on the inner surfaces of the plastic sheets 11a, 11b, and a plurality (three in the illustrated example) of two sets of contacts 15a are provided on the inner surfaces of the plastic sheets 12a, 12b. 15b are provided and their tangents (not shown) are provided so that these contacts 14a, 14b, 15a, 1
5b and tangents are printed. Plastic sheet 11
a, 11b, 12a, 12b, 13a, 13b are plastic sheets 11
The spacer 16 is bent by a bent portion 11c which is a continuous portion of a and 11b, and a spacer 16 is attached by an adhesive or the like so as to surround each contact 14a, 14b, 15a, 15b on the inner surface thereof. Connection parts 17 and 18 are provided at the end of the outer surface of the plastic sheet 11b of the key switch 8 for a telephone number or the like in this integral type key switch and the end of the printed circuit board 6 so as to correspond to each other.
These connecting portions 17 and 18 are connected by a rubber connector 19. This rubber connector 19 is provided with copper foils electrically connected to each other on both sides. Then, the key switch 8 for a telephone number or the like in the integrated type key switch is housed in the key case 1, and the connecting portion 10 is housed in the notch 3. The key switch 8 and the connecting portion 10 are provided behind The printed circuit board 6 is brought into contact with the key case 1 so that the connecting portion 17 of the key switch and the connecting portion 18 of the printed circuit board 6 are connected by the rubber connector 19, and the screw mounting hole 7 of the printed circuit board 6 is connected.
A twisted screw 20 is screwed into the screw hole 5 of the boss 4 of the key case 1 to be attached. The key switch 8 for a telephone number or the like is sandwiched between the support portion 1a and the printed circuit board 6 at the spacer 16. As shown in FIG. 4, the seat 21 is attached to the outer surface of the face plate of the key case 1, and the tip of the operation button 22 connected by the seat 21 is inserted into the operation hole 2. Each operation button 22 corresponds to the contact 14a of the key switch 8 for a telephone number or the like from above the plastic sheet 11a.

Therefore, when any operation button 22 is pressed, the contact point 14a faces the contact point 14a due to the elastic deformation of the plastic film 11a.
When the operation button 22 is opened by bringing it into contact with 14b, the contact point 14a can be separated from the contact point 14b by the resilience of the plastic sheet 11a. Similarly, when an arbitrary portion of the volume adjusting key switch 9 is pressed, the contacts 15a and 15b thereof are pressed.
When they are brought into contact with each other and released, they can be separated from each other.

As described above, according to the above-described embodiment, since the key switch 8 for the telephone number and the key switch 9 for adjusting the volume are integrally formed, the structure can be simplified and the assembling work can be facilitated. It can be performed and the quality can be stabilized.

Effect of the Invention As described above, according to the present invention, the key switch for telephone numbers and the like and the key switch for adjusting the sound volume are integrated as a single key switch via the connecting portion. Therefore, the structure can be simplified, the assembling work can be easily performed, and the quality can be stabilized.

[Brief description of drawings]

1 to 4 show a key switch device for an automobile telephone according to an embodiment of the present invention. FIG. 1 is a perspective view, FIG. 2 is an exploded perspective view, and FIG. 3 is a partially cutaway side view. FIG. 4 is an enlarged cross-sectional view, FIGS. 5 to 7 show a conventional key switch device for an automobile telephone, and FIG. 5 is an exploded perspective view.
FIG. 6 is a partially cutaway side view, and FIG. 7 is an enlarged transverse sectional view. 1 ... Key case, 2 ... Operation hole, 3 ... Notch, 6 ...
Printed circuit board, 8 ... Key switches for telephone numbers, 9
...... Key switch for volume adjustment, 10 …… Serialized section, 11a, 1
1b, 12a, 12b, 13a, 13b …… Plastic sheet, 14
a, 14b, 15a, 15b ... contact, 16 ... spacer, 17, 18 ...
… Connector, 19 …… Rubber connector, 22 …… Operation button.

Claims (1)

[Scope of utility model registration request] 1. A first plastic sheet provided with a plurality of contacts, and a first plastic sheet, which is opposed to the first plastic sheet via a spacer with a gap, and can be selectively brought into contact with the contacts by pressing an operation button. Forming a key switch with the second plastic sheet provided with various contacts, and using any of the contacts of the key switch as a key switch for a telephone number, etc. Key switch device for a car telephone, in which the other contact is used as a key switch for adjusting the volume through the connecting portion, and the key switch for the telephone number and the key switch for adjusting the volume are electrically connected to a printed circuit board. .