Metal dome, switch with metal dome and flat cable with metal dome

Abstract

The utility model discloses a metal dome and a switch and a flat cable provided with the metal dome, the metal dome comprises a metal dome body, a transition section and a contact surface, the metal dome body and the transition section are integrally concave, the contact surface is unfolded outwards, and the metal dome body and the transition section are provided with heights in the longitudinal direction. The metal dome is provided with the contact surface which expands and extends outwards, a structure of arranging four convex contacts on the bearing substrate is omitted, the production process of the bearing substrate is simplified, the working efficiency is improved, meanwhile, the contact surface is in surface contact with the fixed conductive area on the bearing substrate, the product stability is improved, and the service life is prolonged. In addition, the problems that small parts need to be sequentially installed and operation is inconvenient when an existing switch or a flat cable point contact switch is assembled are solved, the metal dome and the limiting frame are relatively and fixedly connected through the isolating membrane to form a semi-finished product, finally the semi-finished product is fixed to the bearing substrate at a time, and operation is easy and feasible.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic switches, in particular to a pot piece and a switch and a cable provided with the pot piece. Background Art

[0002] The pot piece is a metal spring, which is mostly used in micro switches. The working principle is that the pot piece 01 is deformed by pressing it and contacts the fixed conductive surface (area) 02 below it, thereby achieving circuit conduction. The existing pot piece 01 is mostly an elliptical shape with a raised middle, as shown in the attached figure. Figure 1-2 As shown, the lower surface of the elliptical periphery is in contact with four raised contacts 03, and the contacts 03 are higher than the conductive surface (area) 02, that is, the metal thickness of the contacts 03 is greater than that of the conductive surface.

[0003] The metal thickness of (area) 02 must be thick. The four raised contacts 03 provide support and conduction for the pot 01. These four raised contacts 03 are located on the carrier substrate 4. This increases the difficulty of the production process of the carrier substrate 4 and affects the production efficiency of the carrier substrate 4. Furthermore, during assembly, existing touch switches with pots must be installed sequentially from bottom to top according to the arrangement order of the touch switch components. This makes production difficult, brings inconvenience to product assembly, and increases the cost of the switch. Utility Model Content

[0004] In view of the prior art, the purpose of the present invention is to provide a new type of pot piece and a switch and a cable provided with the pot piece, wherein the new type of pot piece is extended by setting.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is: a pot piece, including a pot piece body, a transition section and a contact surface, the pot piece body and the transition section are concave as a whole, the contact surface is outwardly extended, and the pot piece body and the transition section are provided with a height in the longitudinal direction.

[0006] A switch provided with the pot piece comprises a protective film, a pot piece, and a carrier substrate, which are sequentially arranged from top to bottom. The carrier substrate is provided with a fixed conductive area and a pressed conductive area. The pressed conductive area is located inside the fixed conductive area. The contact surface of the pot piece contacts the fixed conductive area, and the pressed conductive area of the pot piece contacts and conducts.

[0007] The carrier substrate is a circuit board.

[0008] The fixed conductive area and the pressed conductive area are realized by laminating copper and plating gold on the surface of the circuit board.

[0009] A limiting frame is provided on the carrying substrate, and the pot piece is placed in the limiting frame.

[0010] At least two conductors are provided in the circuit board, the two conductors are respectively connected to the fixed conductive area and the pressing conductive area, and the conductors are connected to wiring terminals.

[0011] An operating point is provided between the protective film and the pot piece.

[0012] An isolation membrane is provided below the limiting frame, a conducting hole is provided on the isolation membrane, and the thickness of the isolation membrane is not greater than the metal thickness of the circuit board.

[0013] The metal shape on the surface of the circuit board corresponds to the conductive hole.

[0014] A cable having the pot piece is provided, wherein a carrier substrate is provided on the cable, the carrier substrate is a component of the cable, and the cable has an FPC structure.

[0015] The utility model effectively improves the problem that the existing touch switch needs to be provided with four raised contacts on the carrier substrate of the pot piece to ensure the hand feel. The contact between the pot piece and the four raised contacts is only point or line contact, and the product stability is poor. Moreover, when the carrier substrate is a circuit board, the production of the four raised contacts is difficult and costly. By providing the pot piece with a contact surface extending outward, the structure of providing four raised contacts on the carrier substrate is eliminated, the production process of the carrier substrate is simplified, and the operation efficiency is improved. At the same time, the contact surface is in contact with the fixed conductive area on the carrier substrate, which increases the stability of the product and improves the service life. It also solves the problem that the assembly of the existing switch or cable touch switch requires the installation of smaller components in sequence, which is inconvenient to operate. The pot piece and the limit frame are relatively fixedly connected by an isolation membrane to form a semi-finished product. Finally, the semi-finished product is fixed on the carrier substrate at one time, which is simple and easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of an existing metal dome being set on four raised contacts.

[0017] Figure 2 for Figure 1 Schematic diagram of the top view structure.

[0018] Figure 3 This is a schematic diagram of the position structure between the metal dome and the supporting substrate of the present invention.

[0019] Figure 4 It is a top view schematic diagram of the pot piece of the utility model.

[0020] Figure 5 The figure is a disassembled schematic diagram of the switch provided with the pot piece according to the present invention.

[0021] Figure 6 This is a schematic diagram of the disassembly of the wiring arrangement of the pot piece of the utility model.

[0022] Figure 7 for Figure 6 Schematic diagram of the local enlarged structure.

[0023] Figure 8 This is a schematic diagram of product disassembly with operating points set. DETAILED DESCRIPTION

[0024] like Figure 2-3 As shown, a pot piece includes a pot piece body 1, a transition section 2 and a contact surface 3. The pot piece body 1 and the transition section 2 are concave as a whole, the contact surface 3 is expanded outward, and the pot piece body 1 and the transition section 2 are provided with a height in the longitudinal direction. Figure 3 As shown, the height of the pot body 1 and the transition section 2 plus the thickness of the contact surface 3 is equal to the thickness of the attached Figure 1 The pot piece 01 and the height of the raised contact 03 are shown. Preferably, the thickness of the contact surface 3 is equal to the height of the raised contact 03. This structure ensures the feel of a touch switch without setting the height of the raised contact 03. The pot piece body 1, transition section 2 and contact surface 3 are integrally formed.

[0025] like Figure 4 As shown, a switch equipped with such a pot piece includes, from top to bottom, a protective film 5, a pot piece 1, and a carrier substrate 4. The carrier substrate 4 is provided with a fixed conductive area 41 and a press conductive area 02. The press conductive area 02 is located within the fixed conductive area 41. The contact surface 3 of the pot piece contacts the fixed conductive area 41, i.e., surface contact, which increases the conductive stability and service life of the switch product. Surface contact increases the contact surface compared to point or line contact. The press pot piece contacts and conducts electricity by contacting the press conductive area 02.

[0026] As attached Figure 4 As shown, the carrier substrate 4 is a circuit board, and a limit frame 8 is provided on the carrier substrate 4. The pot piece 1 is placed in the limit frame 8. At least two conductors 6 are provided in the circuit board, and the two conductors 6 are respectively connected to the fixed conductive area 41 and the pressing conductive area 02. The conductors 6 are connected to the terminal 61. The conductors 6 and the conductive areas are connected through the conductive column 7. The fixed conductive area 41 and the pressing conductive area 02 are copper-plated or tin-plated on the surface of the circuit board. If the fixed conductive area 41 and the pressing conductive area 02 are copper-plated or tin-plated, as shown in the attached figure, the fixed conductive area 41 and the pressing conductive area 02 are copper-plated or tin-plated. If the fixed conductive area 41 and the pressing conductive area 02 are copper-plated or tin-plated, as shown in the attached figure, the fixed conductive area 41 and the Figure 1 As shown, setting four conductive raised contacts 03 on the surface of the circuit board is a complicated process.

[0027] A cable with the dome is provided, and a supporting substrate 4 is provided on the cable. The supporting substrate 4 is a component of the cable, and the cable is an FPC structure. Figure 6As shown, the cable is an FPC structure with a touch switch. Specifically, the surface of the FPC is a carrier substrate 4, which is provided with a fixed conductive area 41 and a press conductive area 02. A protective film 5, a pot piece 1, a limit frame 8 and an isolation film 9 are sequentially provided above the carrier substrate 4. The isolation film 9 is located between the limit frame 8 and the carrier substrate 4. The isolation film 9 is provided with a conductive hole 91. Figure 7 As shown, the vias correspond to the shapes of the copper and gold-plated surfaces (fixed conductive area 41 and pressed conductive area 02) on the circuit board surface. The thickness of the isolation film 9 is no greater than the thickness of the metal on the circuit board surface, and the isolation film 9 does not affect the surface contact between the contact surface 3 of the metal pot and the fixed conductive area 41.

[0028] As attached Figure 7 As shown, the assembly sequence is as follows: the pot body 1 is supported by an isolation film 9 below the limit frame 8 to form a semi-finished product, preventing the pot from falling out of the limit frame 8. The semi-finished product is then mounted on a carrier substrate 4 provided with a fixed conductive area 41 and a pressed conductive area 02. This mechanism breaks the inherent installation sequence of first fixing the limit frame 8 to the carrier substrate 4, then placing the pot and protective film 5 in sequence. This product is relatively small, and any slight movement of the carrier substrate during this assembly sequence will affect installation, making assembly more difficult.

[0029] It should be noted that the isolation membrane 9 structure in the cable provided with the pot piece is also applicable to the switch provided with the pot piece.

[0030] The present invention effectively improves the problem of the existing touch switch connecting the pot piece on the carrier substrate requiring four raised contacts 03 to ensure the hand feel. The pot piece and the four raised contacts 03 are only in point or line contact, and the product stability is poor. Moreover, when the carrier substrate is a circuit board, the production of the four raised contacts is difficult and costly. The present invention eliminates the need to set the four raised contacts 03 on the carrier substrate 4 by setting an outwardly extending contact surface 3 on the pot piece, simplifying the production process of the carrier substrate 4 and improving the operation efficiency. At the same time, the contact surface 3 is in surface contact with the fixed conductive area 41 on the carrier substrate 4, increasing the product stability and improving the service life. It also solves the problem that the assembly of the existing switch or cable touch switch requires the installation and placement of smaller components in sequence, which is inconvenient to operate. The pot piece and the limit frame are relatively fixedly connected by the isolation membrane 9 to form a semi-finished product. Finally, the semi-finished product is fixed on the carrier substrate 4 at one time, which is simple and easy to operate.

[0031] Preferably, an operating point 10 is provided between the protective film 5 and the pot piece 1. Figure 8 As shown, the operating point 10 further enhances the hand feel.

[0032] Obviously, those skilled in the art may make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if such modifications and variations fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include such modifications and variations.

Claims

1. A metal dome, characterized in that: It includes a pot body, a transition section and a contact surface. The pot body and the transition section are concave as a whole, the contact surface is outwardly extended, and the pot body and the transition section are provided with a height in the longitudinal direction.

2. A switch provided with the metal dome according to claim 1, characterized in that: It includes a protective film, a pot piece, and a supporting substrate distributed in sequence from top to bottom. The supporting substrate is provided with a fixed conductive area and a pressing conductive area. The pressing conductive area is located inside the fixed conductive area. The contact surface of the pot piece is in conflict with the fixed conductive area, and the pressing conductive area of the pot piece is in contact and conductive with the pressing conductive area.

3. The switch according to claim 2, wherein: The carrier substrate is a circuit board.

4. The switch according to claim 3, characterized in that: The fixed conductive area and the pressed conductive area are realized by laminating copper and plating gold on the surface of the circuit board.

5. The switch according to claim 3, characterized in that: A limiting frame is provided on the carrying substrate, and the pot piece is placed in the limiting frame.

6. The switch according to claim 3, wherein: At least two conductors are provided in the circuit board, the two conductors are respectively connected to the fixed conductive area and the pressing conductive area, and the conductors are connected to wiring terminals.

7. The switch according to claim 2, characterized in that: An operating point is provided between the protective film and the pot piece.

8. The switch according to claim 5, characterized in that: An isolation membrane is provided below the limiting frame, and a conducting hole is provided on the isolation membrane. The thickness of the isolation membrane is not greater than the metal thickness on the surface of the circuit board.

9. The switch according to claim 8, characterized in that: The shapes of the copper and gold plating on the surface of the circuit board correspond to the vias.

10. A cable arrangement having the metal dome according to claim 1, characterized in that: A carrier substrate is provided on the cable, and the carrier substrate is a component of the cable, and the cable is an FPC structure.

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