CN2396436Y

CN2396436Y - Keyboard signal transmission device

Info

Publication number: CN2396436Y
Application number: CN 99214867
Authority: CN
Inventors: 胡金隆; 廖子毅
Original assignee: Silitek Corp
Current assignee: Lite On Technology Corp
Priority date: 1999-07-06
Filing date: 1999-07-06
Publication date: 2000-09-13
Anticipated expiration: 2009-07-06

Abstract

The utility model discloses a transmission device, which also comprises a bottom board and a thin film circuit board, wherein, the top surface of the bottom board is provided with an insulating layer. The parts of the insulating layer corresponding to each key part are respectively provided with a conductor and each conductor is provided with an insulating separating body along circumferences. A thin film circuit is paved on each insulating separating body and a circuit layer of the thin film circuit is positioned on a bottom surface. A pair of conducting contacts of the circuit layer are positioned on the position separated by each insulating separating body to vertically correspond to a corresponding conductor. Thus the key separating degree can be reduced to increase space utilizing performance. The utility model simultaneously has portability and can prevent abnormal reaction of contact signals.

Description

The keyboard signal transmitting device

The utility model relates to a kind of signal transmitting device.

At present, in in the face of keyboard press button structure as the requirement for height of notebook computer etc., the signal transmitting device of keyboard adopts thin film circuit more, announces patent cases such as the 237991st, 303975,314250,325162 as: Taiwan patent gazette and has all used the thin film circuit structure.The keyboard signal transmitting device of traditional requirement for height is bottom-up except that having a base plate, other includes thin film circuit, one interval film, an and three-layer thin-film layer such as upper film circuit, wherein go up, be printed with circuit on the following thin film circuit, and with respect to the complex conduction contact of each button assembling place, interval film then is folded in, between the following thin film circuit, and be provided with thereon and the corresponding open-work of conductive junction point, when making button pressed, on, the corresponding conductive junction point of following thin film circuit, can pass the interval film open-work and the conducting that contacts, also wait the signal transmitting device of bilayer film structure in addition for No. 285334 just like: Taiwan patent announcement, except that having a base plate, other comprises thin film circuit and upper film circuit.Also all be printed with circuit on this upper and lower thin film circuit, and with respect to the complex conduction contact of each button assembling place, isolate the conductive junction point of upper and lower thin film circuit according to this being provided with sealing or spacer conductive junction point ring week in addition, similarly, when button pressed, the corresponding conductive junction point of upper and lower thin film circuit can be got rid of spacer and isolate and the conducting that contacts.

In fact, because aforementioned various conventional keyboard signal feelings transmitting devices are between its base plate and button, in fact still comprise the upper film circuit, following thin film circuit and be folded in interval film or spacer between two thin layers, therefore, gross thickness is quite thick, even only have the signal transmitting device of single thin film circuit structure, to cause running because of water or foreign matter disturb undesired in order to exempt from its circuit, also be equipped with suitable glue-line, therefore, general thickness all reaches the degree between 0.250-0.35mm, thus the height of button and can't effectively reducing, for the whole keyboard thickness of reduction, portably use with more convenient, on the other hand, conventional keyboard structure signal device often is not provided with suitable waterproof or anti-allotrylic structure, so easily because of careless water body of invading, foreign matters such as steam or dirt ash and influence the normal operation of circuit.

In view of this, the purpose of this utility model provides a kind of keyboard signal transmitting device, and it is that electric conductor is arranged on the base plate of insulation course, and insulation spacer layer film laying circuit is set around electric conductor, make the thickness of whole device be tending towards lightening, invade and can block extraneous foreign matter.

The purpose of this utility model is achieved in that a kind of keyboard signal transmitting device, be included in the button on the keyboard, it is characterized in that: further comprising a base plate and a film circuit board, wherein plate top surface has insulation course, one electric conductor is set respectively and each electric conductor ring week the insulation spacer is set with respect to each button place on this insulation course; Thin film circuit is laid on the insulation spacer and the line layer on it is positioned at the bottom surface, and the two paired conductive junction points of this line layer are in across insulation spacer and the position relative up and down with corresponding electric conductor.

Described base plate is that sheet metal and its end face are provided with the insulation glued membrane.

Described base plate is the insulating board body made from insulating material.

Described insulation spacer is the fire prevention sealing.

Owing to adopt such scheme: can reduce the button height and the room for promotion usability, carrying convenience simultaneously, and can also prevent the reaction of abnormal contact signal.

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is the utility model first embodiment exploded view;

Fig. 2 is the utility model second embodiment exploded view;

Vertical cut-away schematic view when Fig. 3 does not press down for the utility model button;

Fig. 4 is the vertical cut-away schematic view after the utility model button pressed;

Among the figure: 1. signal transmitting device 10. base plates 100. insulation courses 11. electric conductors 12. insulation spacers 120. slotted eyes 13. film circuit boards 130. conductive junction points 14. elasticity contacts 15. buttons

As Fig. 1, shown in 2, the utility model comprises a base plate 10, this base plate 10 has insulation course 100 at its end face at least, its mode can be to lay suitably insulation glued membrane on an aluminum metal plate, or directly adopt with the made homogeneous insulating board body of insulating material, on base plate 10 insulation courses 100, print respectively in elasticity contact 14 assemblings place of button 15 relatively and (for example: electric conductor 11 elargol) be shaped on suitable conductive material, and on the insulation course 100 at suitable spacing place of each 11 ring week of electric conductor, gummed has the waterproof sealing or other suitable insulating material is set in addition, and have certain thickness insulation spacer 12, make electric conductor 11 can be arranged in 12 slotted eyes that frame surrounds 120 of insulation spacer.On insulation spacer 12, lay the film circuit board 13 that one deck line is positioned at the bottom surface more at last, make each paired two conductive junction point 130 of its line layer, can be sitting at insulation spacer 12 slotted eyes 120 places, and it is right about in the of 11 with electric conductor every the Kongxiang, can be combined into keyboard signal transmitting device 1 in view of the above, as shown in Figure 3.

When button 15 is depressed, as shown in Figure 4, elasticity contact 14 will be out of shape and the film circuit board 13 of oppressing conductive junction point 130 places, impel unsettled film circuit board 13 to descend at slotted eye 120 places, and make its two conductive junction point 130 touch the electric conductor 11 that is positioned on the base plate 10 simultaneously, reach according to this and electrically conduct and the basic purpose of input signal.

Hence one can see that, in the time can reaching equally when pressing keys 15, can cause under the function of contact conduction, the electric conductor 11 of undertaking dielectric is placed on base plate 10 insulation courses 100 of below, and the film circuit board 13 that instead will have conductive junction point 130 is placed in the top, and borrow appropriate insulation spacer 12 to separate body 12 to separate, in fact, except that base plate 10, whole signal transmitting device 1 only occupies certain thickness by thin film circuit 13 and insulation spacer 12, yet gross thickness but can be reduced to below the 0.15mm, and is more thin soft with the 0.25mm-0.35mm thickness of the signal transmitting device of multi-layer thin rete far beyond tradition, so can significantly reduce so as to the height that impels button 15, and help the reduction or the space utilization of whole keyboard thickness, and can more become lightening, portably use with convenient.

On the other hand, owing to be trapped among in its hole slot 120 for the conductive junction point 130 on each electric conductor 11 and the film circuit board 13 all is insulated spacer 12 valid frames on the base plate 10, so foreign matters such as extraneous water body, steam or dirt ash will be obstructed every and can't invade wantonly, and can make electric conductor 11 and conductive junction point 130 keep normal isolation really under normal conditions, or when being pressed, make

electric conductor

11 and 130 of conductive junction points can keep normal electrically exposure level and reduce impedance, guarantee the stability of signal input.

Claims

1, a kind of keyboard signal transmitting device, be included in the button on the keyboard, it is characterized in that: further comprising a base plate and a film circuit board, wherein plate top surface has insulation course, one electric conductor is set respectively and each electric conductor ring week the insulation spacer is set with respect to each button place on this insulation course; Thin film circuit is laid on the insulation spacer and the line layer on it is positioned at the bottom surface, and the two paired conductive junction points of this line layer are in across insulation spacer and the position relative up and down with corresponding electric conductor.

2, by the described keyboard signal transmitting device of claim 1, it is characterized in that: described base plate is that sheet metal and its end face are provided with the insulation glued membrane.

3, by the described keyboard signal transmitting device of claim 1, it is characterized in that: described base plate is the insulating board body made from insulating material.

4, by the described keyboard signal transmitting device of claim 1, it is characterized in that: described insulation spacer is the fire prevention sealing.