High-performance closed membrane switch

Abstract

The utility model discloses a high-performance closed membrane switch, which belongs to the technical field of membrane switches, and comprises a tail-free line layer, an isolating layer and a tail line layer, the isolating layer is arranged between the tail-free line layer and the tail line layer, the adjacent side surfaces of the tail-free line layer and the tail line layer are provided with waterproof layers, and the tail line layer is arranged between the waterproof layers. And the tail-free circuit layer and the tail circuit layer are bonded with the two waterproof layers through pressure-sensitive glue. The isolating layer is a protective film, the periphery of the protective film is coated with pressure-sensitive glue in advance, and a non-stick film with a release layer is attached to the periphery of the protective film. The no-tail circuit layer and the tail circuit layer are arranged to be single-sided boards, and one side of the no-tail circuit layer and one side of the tail circuit layer are circuits formed by conductive paste. The isolation layer and the two waterproof layers are each provided with a plurality of round holes for parts to penetrate through. The high-performance airtight membrane switch is good in sealing effect and high in waterproof performance.

Description

Technical Field

[0001] The utility model belongs to the technical field of membrane switches, in particular to a high-performance sealed membrane switch. Background Art

[0002] As the environment requirements for the use of electronic equipment increase, the key circuits of electronic equipment, electrical equipment, computers, etc. have continuously increased requirements for airtightness such as waterproofing and corrosion resistance. Among them, the membrane switches in keys and keyboards are the most critical components.

[0003] Existing membrane switches have a three-layer structure, with the upper and lower conductive layers and an isolation layer in the middle. The isolation layer is bonded to the upper and lower layers using screen-printed pressure-sensitive adhesive. The adhesive is printed on at least two of the three layers, cured after baking, and then bonded together to form a closed space, protecting the circuits and providing a waterproof effect. However, with only one layer of protection, water can still seep into the center, affecting the normal operation and service life of the membrane switch. Utility Model Content

[0004] The purpose of the utility model is to provide a high-performance sealed membrane switch to solve the problems raised in the background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solutions: a high-performance sealed membrane switch, comprising a tailless circuit layer, an isolation layer, and a tail circuit layer, wherein the isolation layer is arranged between the tailless circuit layer and the tail circuit layer, and the adjacent sides of the tailless circuit layer and the tail circuit layer are both provided with a waterproof layer, and the tailless circuit layer and the tail circuit layer are both bonded to the two waterproof layers using pressure-sensitive adhesive.

[0006] As a preferred solution, the isolation layer is configured as a protective film, and the periphery of the protective film is pre-coated with pressure-sensitive adhesive and attached with a non-stick film with a release layer.

[0007] As a preferred solution, the tailless circuit layer and the tail circuit layer are both configured as single-sided boards, and one side of the tailless circuit layer and the tail circuit layer are circuits formed of conductive paste.

[0008] As a preferred solution, the isolation layer and the two waterproof layers are both provided with a plurality of circular holes for components to pass through.

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

[0010] This high-performance sealed membrane switch features two waterproof layers and an isolation layer in the middle, which can effectively reduce the impact between the tailless circuit layer and the tail circuit layer. The waterproof layer reduces the impact of accidental water seepage on the other circuit layer. The isolation layer is configured as a protective film, and the outer periphery of the protective film is pre-coated with pressure-sensitive adhesive and attached with a non-stick film with a release layer, allowing for rapid processing and molding of the tailless circuit layer and the tail circuit layer bonded to the waterproof layer.

[0011] This high-performance sealed membrane switch has good sealing effect and strong waterproof performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a cross-sectional view of the present utility model.

[0013] Description of reference numerals:

[0014] In the figure: 1. No-tail circuit layer; 2. Isolation layer; 3. Tail circuit layer; 4. Waterproof layer. DETAILED DESCRIPTION

[0015] In the following description, numerous specific details are provided to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention can be practiced without one or more of these details. In other instances, certain technical features known in the art are not described to avoid confusion with the present invention.

[0016] The connection method can be bonding, welding, bolt connection, etc., which shall be based on actual needs.

[0017] In order to solve the problems raised, such as Figure 1 The high-performance sealed membrane switch shown includes a tailless circuit layer 1, an isolation layer 2, and a tail circuit layer 3. The isolation layer 2 is arranged between the tailless circuit layer 1 and the tail circuit layer 3. The adjacent sides of the tailless circuit layer 1 and the tail circuit layer 3 are both provided with a waterproof layer 4, and the tailless circuit layer 1 and the tail circuit layer 3 are bonded to the two waterproof layers 4 using pressure-sensitive adhesive.

[0018] The isolation layer 2 is set as a protective film, and the outer periphery of the protective film is pre-coated with pressure-sensitive glue, and a non-stick film with a release layer is attached. First, remove one non-stick film of the protective film and bond it to one of the waterproof layers 4. After bonding is completed, remove the other non-stick film and bond the other waterproof layer 4 to obtain a complete high-performance sealed membrane switch.

[0019] The tailless circuit layer 1 and the tail circuit layer 3 are both set as single-sided boards. One side of the tailless circuit layer 1 and the tail circuit layer 3 is a circuit formed by conductive paste. The tailless circuit layer 1 and the tail circuit layer 3 are pre-processed. After the processing is completed, the waterproof layer 4 is glued with pressure-sensitive glue. The waterproof layer 4 is on the side without the panel.

[0020] The isolation layer 2 and the two waterproof layers 4 are both provided with a plurality of circular holes for components to pass through.

[0021] Working principle:

[0022] This high-performance sealed membrane switch pre-processes the tailless circuit layer 1 and the tail circuit layer 3. After processing, the waterproof layer 4 is glued with pressure-sensitive glue, and one non-stick film of the protective film is removed first and bonded to one of the waterproof layers 4. After bonding is completed, the other non-stick film is removed and the other waterproof layer 4 is glued to obtain a complete high-performance sealed membrane switch.

[0023] It should be noted that, in this document, relational terms such as one and two are merely 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.

[0024] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-performance sealed membrane switch, comprising a tail-free circuit layer (1), an isolation layer (2), and a tail circuit layer (3), characterized in that: The isolation layer (2) is arranged between the tailless circuit layer (1) and the tail circuit layer (3); the adjacent sides of the tailless circuit layer (1) and the tail circuit layer (3) are both provided with waterproof layers (4); and the tailless circuit layer (1) and the tail circuit layer (3) are both bonded to the two waterproof layers (4) using pressure-sensitive adhesive.

2. A high performance sealed membrane switch according to claim 1, characterized in that: The isolation layer (2) is configured as a protective film, and the outer periphery of the protective film is pre-coated with pressure-sensitive adhesive and is attached with a non-stick film with a release layer.

3. A high performance sealed membrane switch according to claim 1, characterized in that: The tailless circuit layer (1) and the tail circuit layer (3) are both configured as single-sided boards, and one side of each of the tailless circuit layer (1) and the tail circuit layer (3) is a circuit formed by conductive paste.

4. A high performance sealed membrane switch according to claim 1, characterized in that: The isolation layer (2) and the two waterproof layers (4) are both provided with a plurality of circular holes for components to pass through.

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