CN214753468U

CN214753468U - Key with circuit protection structure and keyboard

Info

Publication number: CN214753468U
Application number: CN202120610905.6U
Authority: CN
Inventors: 李文锋; 邹伟民; 张清
Original assignee: Jiangsu Transimage Technology Co Ltd
Current assignee: Jiangsu Transimage Technology Co Ltd
Priority date: 2021-03-25
Filing date: 2021-03-25
Publication date: 2021-11-16
Anticipated expiration: 2031-03-25
Also published as: WO2022199245A1

Abstract

The utility model discloses a key and a keyboard with a circuit protection structure, which comprises a bottom plate, a circuit board, scissor legs and a hook for connecting the scissor legs and the bottom plate, wherein the hook is arranged on the connected bottom plate and the circuit board in a mode of in-mold forming or hot melting; and a protective layer is arranged above the circuit board and used for preventing the circuit of the circuit board from being damaged by high temperature. The clamping hook structure of the utility model has convenient connection, low process requirement and difficult error generation; by arranging the protective layer, the circuit board of the keyboard can be protected when the clamping hook is formed; the utility model discloses an extensive applicability also is applicable to the keyboard that has the function of being shaded.

Description

Key with circuit protection structure and keyboard

Technical Field

The utility model relates to a button and keyboard especially relate to a button and keyboard with circuit protection structure.

Background

With the progress of science and technology, the existing key structure can not meet the production process of keyboard parts which are updated day by day. In the prior art, the processing technology of the clamping hook in the keyboard key is mainly integrated with the bottom plate, and the technology has higher requirements on processing quality and level.

The applicant has therefore endeavored to develop other snap-hook connection means. The applicant researches and studies that the clamping hook is arranged on the bottom plate through in-mold forming and thermoplastic molding processes, and finds that the high-temperature and high-pressure environment caused by the connection mode can damage the existing circuit structure of the keyboard.

SUMMERY OF THE UTILITY MODEL

Utility model purpose: the utility model aims at providing a frivolous, high button of security and keyboard with circuit protection architecture.

The technical scheme is as follows: the utility model discloses a button with circuit protection structure, including bottom plate, flexible line way board, scissors foot and connect scissors foot and bottom plate's trip, the trip is installed on bottom plate and flexible line way board that have already been connected through the mode of in-mould forming or hot melt; and a protective layer is arranged above the flexible circuit board and used for preventing the circuit of the circuit board from being damaged by high temperature.

The protective layer is fully distributed on the flexible circuit board.

The flexible circuit board, the bottom plate and the protective layer are provided with first openings for placing the clamping hooks.

The protective layer is disposed around the first opening.

The key further comprises a backlight unit, and the flexible circuit board, the bottom plate and the protective layer are provided with second openings for placing a light source of the backlight unit.

The trip includes base, connecting portion and block portion, the bottom plate below is located to the base, and the base diameter is greater than first opening diameter.

And a protective layer is arranged below the bottom plate.

The utility model discloses a button with circuit protection structure, including PCBA board, backlight unit and scissors foot, backlight unit includes light source and light guide plate, be equipped with the trip of connecting the scissors foot on the light guide plate, the trip is installed on PCBA board through the mode of in-mould forming or hot melt; and a protective layer is arranged above the PCBA board and used for preventing the circuit board from being damaged by high temperature.

The utility model discloses keyboard with circuit protection structure, including foretell button.

Has the advantages that: compared with the prior art, the utility model has the advantages of as follows:

the clamping hook structure of the utility model has convenient connection, low process requirement and difficult error generation; by arranging the protective layer, the circuit board of the keyboard can be protected when the clamping hook is formed; the utility model discloses an extensive applicability also is applicable to the keyboard that has the function of being shaded.

Drawings

Fig. 1 is a schematic view of a partial structure of the present invention;

FIG. 2 is a schematic view of the local structure of the utility model after the hook is arranged;

fig. 3 is a schematic view of the overall structure of the present invention.

Detailed Description

The technical solution of the present invention will be further explained with reference to the accompanying drawings.

The key of the present embodiment includes a key cap 7, an elastic body under the key cap 7, scissor legs 8 connecting the key cap and the base plate 3, a flexible wiring board 2 over the base plate 3, and a backlight unit 6. Be equipped with trip 5 on the bottom plate 3, trip 51 is used for fixed scissors foot 8, and trip 5 includes two kinds of forms of fixing base and sliding seat, fixing base and 8 terminal fixed connection of scissors foot, and the sliding seat is fixed on bottom plate 3, and the sliding seat has the spout for the end of scissors foot 8 slides in the sliding seat.

In this embodiment, the hook 5 is mounted on the connected base plate 3 and flexible circuit board 2 by means of in-mold molding or heat fusion. The process of in-mold forming comprises the following steps: and (3) putting the PCBA into an injection mold, coating the PCBA with the material in a high-temperature high-pressure molten plastic injection mode, cooling, and opening the mold to obtain the formed hook. The hot melting process comprises the following steps: the clamping hook material penetrates through the hole on the PCBA, the back of the PCBA protrudes, and then the protruding part is melted and flattened in a high-temperature hot pressing mode to enable the PCBA to be coated, so that the clamping hook is firmly combined with the PCBA.

Because the above-mentioned technological process of preparation trip needs high temperature or high pressure processing mode, is only equipped with a layer of insulating varnish on the inner line 4 of flexible line way board 2, can't bear high temperature, consequently the circuit board 2 top of this embodiment is provided with protective layer 1, and the protective layer is high temperature resistant material. In this embodiment, the protection layer 1 is fully distributed on the circuit board. The wiring board 2, the base plate 3 and the protective layer 1 have a first opening 6 for creating a hook 5. In other embodiments, the protective layer 1 may also be arranged around the first opening 6. When the button is contact, the protective layer 1 is provided with an avoiding hole below the corresponding elastic body, so that the conduction between the elastic body and the circuit is ensured. When the key is of a capacitance type, no avoidance hole is required to be arranged.

The hook 5 includes a base 53, a connecting portion 52 and a fastening portion 51, the fastening portion 51 has different structures according to the form of the hook (whether a fixed seat or a sliding seat), and the connecting portion 52 extends into the first opening 6. In other embodiments, the hook 5 may or may not include a base, and the bottom thereof is directly flush with the lower edge of the bottom plate. When the hook 5 includes a base 53, the diameter of the base 53 is larger than the diameter of the first opening 6, and generally, the diameter of the engaging portion 51 is also larger than the diameter of the first opening 6, so that the hook 5 can be engaged with a substrate or a circuit board. In the present embodiment, since the hook 5 is provided with the base 53, it means that the lower portion of the base plate 3 is also subjected to high temperature treatment, and if the base plate is made of a material that does not resist high temperature, the protective layer 1 may be provided below the base plate 3.

In this embodiment, the key further includes a backlight unit 9, a light source of the backlight unit 9 is embedded in the second opening 10 on the bottom plate 3 and the protection layer 1, and at this time, the protection layer 1 may also be made of a material with a light guiding function and high temperature resistance.

In another embodiment of the present invention, the present invention relates to a key or keyboard structure having a backlight function. In this embodiment, the button includes PCBA board, backlight unit and scissors foot, and backlight unit includes light source and light guide plate, be equipped with the trip of connecting the scissors foot on the light guide plate. The clamping hook is arranged on the PCBA board in an in-mold forming or hot melting mode, and at the moment, the PCBA board is a rigid circuit board and is used as a bottom plate together with a combined structure of the light guide plate. And a protective layer is arranged above the PCBA board and used for preventing the circuit board from being damaged by high temperature. The light guide plate is arranged above the protective layer, and the circuit integration of the backlight module and the PCBA are arranged in the protective layer together. The rest of the structure is the same as the above embodiment.

Claims

1. A key with a circuit protection structure comprises a bottom plate, a flexible circuit board, scissor legs and a clamping hook for connecting the scissor legs and the bottom plate, and is characterized in that the clamping hook is arranged on the connected bottom plate and the flexible circuit board in an in-mold forming or hot melting mode; and a protective layer is arranged above the flexible circuit board and used for preventing the circuit of the circuit board from being damaged by high temperature.

2. The key with circuit protection architecture as claimed in claim 1, wherein said protection layer is over-laid with flexible circuit board.

3. The key with circuit protection structure as claimed in claim 1, wherein the flexible circuit board, the bottom board and the protection layer have a first opening for receiving the hook.

4. The key with circuit protection architecture as recited in claim 3, wherein said protective layer is disposed around said first opening.

5. The key with circuit protection architecture as claimed in claim 1, wherein said key further comprises a backlight unit, and said flexible circuit board, said bottom plate and said protection layer have a second opening for placing a light source of said backlight unit.

6. The key with the circuit protection structure as claimed in claim 3, wherein the hook comprises a base, a connecting portion and a fastening portion, the base is disposed under the bottom plate, and the diameter of the base is larger than the diameter of the first opening.

7. The key with circuit protection structure as claimed in claim 6, wherein a protection layer is disposed under said bottom plate.

8. A key with a circuit protection structure comprises a PCBA board, a backlight module and scissor legs, wherein the backlight module comprises a light source and a light guide plate, and a clamping hook connected with the scissor legs is arranged on the light guide plate; and a protective layer is arranged above the PCBA board and used for preventing the circuit board from being damaged by high temperature.

9. The key with circuit protection structure as claimed in claim 8, wherein the light guide plate is disposed above the passivation layer, and the circuit of the backlight module is integrated with the PCBA.

10. A keyboard with a line protection structure, characterized by comprising the key-press of any one of claims 1-7.