Membrane switch with novel jumper structure

Abstract

The utility model discloses a membrane switch with a novel jumper structure, which belongs to the technical field of membrane switches and comprises a wiring layer, an upper circuit and a lower circuit are placed on the wiring layer in a centralized manner, the wiring layer is further provided with a KEY mechanism, the upper circuit and the lower circuit are converged at the position of the KEY mechanism, a gap is reserved between the upper circuit and the lower circuit, and the gap is a contact. The other layer of PET only containing the PAD is in contact with the PET containing the circuit to achieve the corresponding effect of communicating the upper circuit and the lower circuit, the front face of the wiring layer is a main circuit and a contact, the back face of the wiring layer is a jumper layer, and the main circuit layer on the front face and the jumper layer on the back face are communicated through a through hole. According to the membrane switch of the novel jumper structure, circuits are integrated on one layer, printing procedures are reduced, control processes are reduced, a traditional lap joint process is omitted, manufacturing cost and quality cost are obviously reduced, an insulation UV procedure is omitted, the membrane switch is not uneven due to printing UV, glue bonding is facilitated, the overall waterproof and anti-vulcanization effect is improved, and the service life of the membrane switch is prolonged. And the insulating property of the jumper insulating layer is multiplied by PET.

Description

Technical Field

[0001] The utility model belongs to the technical field of membrane switches, in particular to a membrane switch with a novel jumper structure. Background Art

[0002] With the continuous improvement of the thinness, lightness and waterproof function of computer keyboards, the membrane switch inside the keyboard is the most crucial component. Currently, the design of the membrane switch circuit is that each layer of PET is designed as a single-layer circuit. For the parts where wiring cannot be carried out due to mechanisms or other reasons on the circuit, the connection of two circuits is achieved by printing jumpers on the insulating UV. However, there are still certain problems with the existing circuits. First, the thickness of the insulating UV ink printed on the circuit needs to reach about 30 - 4um to achieve the insulating effect. Second, the insulating UV will increase the thickness of the membrane switch. Third, there is a risk of failure of the insulating UV ink. Content of the Utility Model

[0003] The purpose of the utility model is to provide a membrane switch with a novel jumper structure to solve the problems raised in the background art.

[0004] To achieve the above purpose, the utility model provides the following technical solution: A membrane switch with a novel jumper structure, comprising:

[0005] A wiring layer, where the upper and lower circuits are centrally placed. The wiring layer is also provided with a KEY mechanism, and the upper and lower circuits converge and leave a gap at the KEY structure position. The gap is the contact point. The corresponding upper and lower circuits are connected by contacting another PET layer containing only PAD with the PET layer containing the circuit. The front side of the wiring layer is the main circuit and the contact point, and the back side is the jumper layer. The main circuit layer on the front side and the jumper layer on the back side are conducted through through-holes, that is, through-holes are drilled in the corresponding areas and the two-sided circuits are connected by printing and grouting;

[0006] A protective layer, which is attached to the back side of the wiring layer to protect the jumper and insulation. The protective layer is set as a pressure-sensitive PET film or insulating ink;

[0007] A middle partition layer, which has openings at the KEY positions for the PADs of the upper and lower circuits to contact when pressed and separate when there is no pressure;

[0008] A conduction layer, when the KEY area is under pressure, this layer contacts the contact point of the circuit layer and connects the two ends of the wiring layer, thereby outputting an on-off signal.

[0009] Compared with the prior art, the technical effects and advantages of the utility model are:

[0010] The membrane switch with the novel jumper structure. The mechanism of the present utility model is to print circuits on both sides of a layer of PET. The main circuit is printed on one side, and the jumper is printed on the other side. The UV printing layer is omitted, and PET is used as the jumper insulation layer. The back side uses a cover film to cover the circuit, eliminating the related processes of UV printing and reducing the thickness caused by UV printing. The reduction of the UV thickness is beneficial to the flatness of water-based glue printing, which can improve the waterproof function, and the insulation function is improved to 1000MΩ 100V with no risk of failure.

[0011] For the membrane switch with the novel jumper structure, the circuits are concentrated on one layer, reducing the printing processes and control processes. The traditional overlapping process is removed, significantly reducing the manufacturing cost and quality cost. By eliminating the insulation UV process, the membrane switch is no longer uneven due to UV printing, which is beneficial to glue bonding, thereby improving the overall waterproof and anti-sulfuration effects, and doubling the insulation performance of the jumper insulation layer converted to PET. Brief Description of the Drawings

[0012] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0013] Figure 1 It is the structure diagram of the present utility model;

[0014] Figure 2 It is the cross-sectional view of the present utility model;

[0015] Figure 3 It is the front view of the wiring layer of the present utility model;

[0016] Figure 4 It is the front view of the jumper layer of the present utility model;

[0017] Figure 5 It is the front view of the protective layer of the present utility model;

[0018] Figure 6 It is the front view of the middle partition layer of the present utility model;

[0019] Figure 7 It is the front view of the conduction layer of the present utility model.

[0020] Explanation of the Reference Numerals in the Drawings:

[0021] In the figure:

[0022] 1. Wiring layer; 2. Jumper layer; 3. Protective layer; 4. Middle partition layer; 5. Conduction layer; 6. Through hole. DETAILED DESCRIPTION

[0023] In the following description, a large number of specific details are given to provide a more thorough understanding of the utility model. However, it is obvious to those skilled in the art that the utility model can be implemented without one or more of these details. In other examples, in order to avoid confusion with the utility model, some technical features known in the art are not described.

[0024] Unless otherwise defined, the directions of up, down, left, right, front, back, inside and outside involved in this document are based on the directions of up, down, left, right, front, back, inside and outside in the figures shown in the present utility model, and are explained here together.

[0025] The connection method can be bonding, welding, bolt connection, etc., depending on actual needs.

[0026] See also Figures 1 to 7 As shown, a membrane switch with a novel jumper structure, this embodiment includes:

[0027] Wiring layer 1, where upper and lower lines are centrally placed, and a KEY mechanism is also provided on the wiring layer 1, and the upper and lower lines converge at the KEY structure position and leave a gap, the gap is a contact, and another layer of PET containing only PAD contacts the PET containing the line to achieve the corresponding upper and lower line connection effect, the front side of the wiring layer 1 is the main line and the contact, and the back side is the jumper layer 2, the main line layer on the front side and the jumper layer 2 on the back side are connected through the through hole 6, that is, the through hole 6 is punched in the corresponding area to connect the lines on both sides through printing and grouting;

[0028] A protective layer 3 is attached to the back of the wiring layer 1 to protect the jumper and insulation. The protective layer 3 is set to be a PET film with glue or insulating ink;

[0029] The middle partition layer 4 has a hole at the KEY, so that the PADs of the upper and lower lines can contact when under pressure and separate when there is no pressure;

[0030] Conductive layer 5, when the KEY area is under pressure, this layer contacts the circuit layer, connecting the two ends of the wiring layer 1, thereby outputting an on-off signal.

[0031] It should be noted that in this text, relational terms such as "one" and "two" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising one..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the said element.

[0032] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A membrane switch with a novel jumper structure, characterized in that: include: A wiring layer (1), wherein the wiring layer (1) is centrally provided with upper and lower circuits, and the wiring layer (1) is also provided with a KEY structure, and the upper and lower circuits merge at the position of the KEY structure and leave a gap, wherein the gap is a contact point, and another layer of PET containing only PAD contacts the PET containing the circuit to achieve a corresponding upper and lower circuit connection effect, wherein the front side of the wiring layer (1) is a main circuit and a contact point, and the back side is a jumper layer (2), and the main circuit layer on the front side and the jumper layer (2) on the back side are connected through a through hole (6), that is, a through hole (6) is punched in a corresponding area and the circuits on both sides are connected through printing and grouting; A protective layer (3) is attached to the back of the wiring layer (1) to protect the jumper and provide insulation. The protective layer (3) is configured as a PET film with adhesive or insulating ink. The middle partition layer (4) has a hole at the KEY, so that the PADs of the upper and lower lines can be in contact when under pressure and separated when there is no pressure; The conductive layer (5) contacts the circuit layer when the KEY area is subjected to pressure, thereby connecting the two ends of the wiring layer (1) and outputting an on / off signal.

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