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US 11,948,758 B2Granted
Push switch
AssigneeMitsumi Electric Co., Ltd.
InventorsDaiki Fujimoto, Hidetake Kikuchi
Life of this patent
Estimating the term…
Abstract
A push switch contains a circuit substrate, two fixed contacts disposed on the circuit substrate, a dome-shaped spring which is disposed above the two fixed contacts and can be displaced between a first position in which the two fixed contacts are in a non-conductive state and a second position in which the two fixed contacts are in a conductive state and a conductive elastic member disposed on a surface of the dome-shaped spring facing the circuit substrate and having a surface facing the two fixed contacts. At least the surface of the conductive elastic member facing the two fixed contacts has conductivity. When the dome-shaped spring is displaced to the second position, the two fixed contacts are in the conductive state through the conductive elastic member.
Claims8
A push switch comprising:
- a circuit substrate;
- two fixed contacts disposed on the circuit substrate;
- a non-conductive spacer disposed on the circuit substrate;
- a dome-shaped spring which is disposed on the non-conductive spacer so as to be located above the two fixed contacts and can be displaced between a first position in which the two fixed contacts are in a non-conductive state and a second position in which the two fixed contacts are in a conductive state;
- and
- a conductive elastic member disposed on a surface of the dome-shaped spring facing the circuit substrate,
- wherein the dome-shaped spring has a central movable portion and a marginal portion formed so as to surround an edge of the central movable portion and extend from the edge of the central movable portion toward a lower and outer side,
- wherein the conductive elastic member is formed into a layer structure containing an elastic portion adhering on a surface of the central movable portion of the dome-shaped spring facing the circuit board and a conductive layer disposed on a surface of the elastic portion facing the circuit board,
- wherein when the dome-shaped spring is displaced to the second position, the two fixed contacts are in the conductive state through the conductive layer, and
- wherein a lower end of the marginal portion of the dome-shaped spring is placed on the non-conductive spacer, and wherein a gap is between a center portion of the marginal portion and the non-conductive spacer.
7 more elements
A push switch comprising:
- a circuit substrate;
- a central contact disposed on the circuit substrate;
- an outer contact disposed on the circuit substrate so as to be spaced apart from the central contact;
- a non-conductive spacer disposed on the circuit substrate;
- a dome-shaped spring which is disposed on the non-conductive spacer so as to be located above the central contact and the outer contact and can be displaced between a first position in which the central contact and the outer contact are in a non-conductive state and a second position in which the central contact and the outer contact are in a conductive state;
- and
- a conductive elastic member disposed on a surface of the dome-shaped spring facing the circuit substrate,
- wherein the dome-shaped spring has a central movable portion and a marginal portion formed so as to surround an edge of the central movable portion and extend from the edge of the central movable portion toward a lower and outer side,
- wherein the conductive elastic member is formed into a layer structure containing an elastic portion adhering on a surface of the central movable portion of the dome-shaped spring facing the circuit board and a conductive layer disposed on a surface of the elastic portion facing the circuit board,
- wherein when the dome-shaped spring is displaced to the second position, the central contact and the outer contact are in the conductive state through the dome-shaped spring and the conductive elastic member, and
- wherein a lower end of the marginal portion of the dome-shaped spring is placed on the non-conductive spacer, and wherein a gap is between a center portion of the marginal portion and the non-conductive spacers.
8 more elements
A push switch comprising:
- a circuit substrate;
- a central contact disposed on the circuit substrate;
- an outer contact disposed on the circuit substrate so as to be spaced apart from the central contact;
- a dome-shaped spring which is disposed above the central contact and the outer contact and can be displaced between a first position in which the central contact and the outer contact are in a non-conductive state and a second position in which the central contact and the outer contact are in a conductive state;
- and
- a conductive elastic member disposed on a surface of the dome-shaped spring facing the circuit substrate,
- wherein the conductive elastic member is formed into a layer structure containing an elastic portion adhering on a surface of a central movable portion of the dome-shaped spring facing the circuit board and a conductive layer disposed on a surface of the elastic portion facing the circuit board,
- wherein when the dome-shaped spring is displaced to the second position, the central contact and the outer contact are in the conductive state through the dome-shaped spring and the conductive elastic member, and
- wherein the dome-shaped spring has:
- a marginal portion which electrically contacts with the outer contact when the dome-shaped spring is in both of the first position and the second position, and
- the central movable portion which does not electrically contact with the central contact when the dome-shaped spring is in the first position and electrically contacts with the central contact through the conductive layer of the conductive elastic member when the dome-shaped spring is in the second position.
8 more elements
Dependencies are inferred from the claim text.