An electromagnetic relay includes a fixed spring, a fixed contact configured to be swaged so as to be attached to the fixed spring, a movable spring, and a movable contact provided on the movable spring so as to be capable of making contact with the fixed contact, wherein a swaged portion of the fixed contact is formed so as not to protrude from a surface of the fixed spring.

A key structure includes a base plate, a key cap, a positioning base, a positioning cover, and a spring. The key cap is disposed above the base plate and has a bottom surface. The positioning base is connected to the bottom surface of the key cap and has a positioning recess. The positioning cover is slidably connected to the positioning base, is inserted into the positioning recess, and includes a bottom portion and a side wall. The spring includes a first spring portion and a second spring portion. The first spring portion is located in the positioning recess and is in contact with the bottom surface of the key cap. The second spring portion is located in the positioning cover. An orthographic projection of the first spring portion on the bottom surface of the key cap is overlapped with an orthographic projection of the side wall of the positioning cover on the bottom surface of the key cap.

A push-button switch has a sound function and a button accepts a pushing operation. A second plunger slides in coordination with the pushing operation on the button. A torsion coil spring stores or releases elastic energy together with sliding of the second plunger. A sounder unit slides using elastic energy released by the torsion coil spring at the same time as the torsion coil spring elastically deforms, and the sounder unit generates a hitting sound by impacting a hitting piece. A movable contact piece has a movable-side contact Pm and is capable of moving due to being pushed by the sliding sounder unit. A fixed contact piece has a fixed side contact, the movable-side contact Pm being engaged with the fixed side contact at the same time or substantially at the same time as the sounder unit hits the hitting piece.

A key structure includes a base plate, a key cap, a positioning base, a positioning cover, and a spring. The key cap is disposed above the base plate and has a bottom surface. The positioning base is connected to the bottom surface of the key cap and has a positioning recess. The positioning cover is slidably connected to the positioning base, is inserted into the positioning recess, and includes a bottom portion and a side wall. The spring includes a first spring portion and a second spring portion. The first spring portion is located in the positioning recess and is in contact with the bottom surface of the key cap. The second spring portion is located in the positioning cover. The first spring portion is located on a path on which the side wall of the positioning cover slides toward the bottom surface of the key cap.

A configuration that easily generates an operation sound and opening/closing of a contact at the same time or substantially at the same time, without increasing manufacturing cost. A push-button switch s having a sound function, wherein a button 11 accepts a pushing operation. A second plunger 13 slides in coordination with the pushing operation on the button 11. A torsion coil spring 14 stores or releases elastic energy together with sliding of the second plunger 13. A sounder unit 15 slides using elastic energy released by the torsion coil spring 14 at the same time as the torsion spring 14 elastically deform, and the sounder unit 15 generates a hitting sound by impacting a hitting piece 181. A movable contact piece 16 has a movable-side contact Pm and is capable of moving due to being pushed by the sliding sounder unit 15. A fixed contact piece 17 has a fixed side contact Pf, the movable-side contact Pm being engaged with the fixed side contact Pf at the same time or substantially at the same time as the sounder unit 13 hits the hitting piece 181.

A push switch includes: a first fixture contact; a second fixture contact; a member that holds the first and second fixture contacts; a movable member positioned opposite a surface of the member in an operation direction; and a contact member. The contact member includes: a first support and a second support that are supported by the member; and a joint that joins the first support to the second support. The movable joint is disposed between the joint of the movable member and the member, with neither the first support nor the second support overlapping the movable member in a planar view.

A keyswitch includes a bottom board, a cap structure, a lifting mechanism, and an elastic member. The lifting mechanism is detachably connected to the cap structure and the bottom board to make the cap structure movable upward and downward relative to the bottom board. The elastic member is connected to the cap structure so as to be detached from the lifting mechanism together with the cap structure when the cap structure is separate from the lifting mechanism.

A push switch having the contact piece including a support part supported on a base member, a movable contact part, and an interconnection part interconnecting the support part and the movable contact part. The movable contact part is movable between a position contacting a first fixed contact part and a position separate from the first fixed contact part. The contact piece is configured so that, when a pressure reception member is pushed to be moved closer to a specific surface of the base member to cause change in shape of the movable member, the interconnection part is pushed by the movable member and the movable contact part is moved along operation directions. The movable contact part located at a position facing a through hole in the operation directions. The movable contact part has a size and shape to be allowed to pass through the through hole in the operation directions.

A switch device structure provides an ensuring system to improve the shortcoming of the conventional switch device. The switch device structure includes a main body and an operation button assembled with the main body. The main body defines a chamber in which a base seat is assembled. An operation body and a wire connection module are disposed on the base seat. The base seat is formed with a cavity in which an elastic unit is mounted. The elastic unit includes a fixed section and a free section. In response to the move of the operation body and with the fixed section serving as a fulcrum, the free section of the elastic unit can push a second contact of the wire connection module into contact with a first contact to close the circuit or away from the first contact to open the circuit.

A push switch having the contact piece including a support part supported on a base member, a movable contact part, and an interconnection part interconnecting the support part and the movable contact part. The movable contact part is movable between a position contacting a first fixed contact part and a position separate from the first fixed contact part. The contact piece is configured so that, when a pressure reception member is pushed to be moved closer to a specific surface of the base member to cause change in shape of the movable member, the interconnection part is pushed by the movable member and the movable contact part is moved along operation directions. The movable contact part located at a position facing a through hole in the operation directions. The movable contact part has a size and shape to be allowed to pass through the through hole in the operation directions.