Electromagnetic contact device
View Patent ↗An electromagnetic contact device has a terminal base ( 18 ) formed on one end of a coil frame around which a winding of an electromagnetic coil is wound; a terminal ( 20 a ) which can be connected to external wiring, and a winding wire binding portion ( 20 e ) which can bind an end portion of the winding, wound around the coil frame to establish connection. The coil terminal ( 20 ) is a component formed by integrating the terminal ( 20 a ), the winding wire binding portion ( 20 e ), and a portion to be engaged ( 20 b ). This coil terminal ( 20 ) is mounted by press-fitting a press-fit engaging portion ( 18 b ), which is formed in the terminal base ( 18 ), in the portion to be engaged ( 20 b ) to establish engagement.
1. An electromagnetic contact device, comprising:
an electromagnetic coil having a winding wound around a coil frame,
a terminal base formed integrally with one end of the coil frame and including a press-fit engaging portion having engaging walls apart from each other, holding portions extending laterally from the engaging walls in a direction close to each other, a press-fit space defined by the engaging walls and the holding portions, and a slit formed between the holding portions, and
a coil terminal formed as one member, and including a terminal portion connectable to an external wiring, a press-fitted portion extending downwardly from the terminal portion and having engaging teeth formed on side portions thereof facing the engaging walls, a foundation portion extending outwardly from the press-fitted portion in a direction substantially parallel to the terminal portion and having a neck portion at one end portion thereof to pass through the slit, and a winding wire binding portion bent upwardly from the foundation portion substantially parallel to the press-fitted portion, the winding wire binding portion being connectable to an end portion of the winding by binding,
wherein
the press-fit engaging portion engages the press-fitted portion by press fitting such that the engaging teeth engage the engaging walls in the press-fit space.
2. An electromagnetic contact device according to claim 1 , wherein at least one of the press-fitted portion or the press-fit engaging portion includes a blocking portion forming a blocked space in the press-fit space.
3. An electromagnetic contact device according to claim 1 , wherein the press-fit engaging portion includes an escape-stopping portion preventing escape in a direction opposite a press-fit direction of the coil terminal.
4. An electromagnetic contact device according to claim 3 , wherein a second housing having a coil terminal accommodation chamber accommodating the coil terminal is connected to a first housing accommodating the electromagnetic coil, and the coil terminal accommodation chamber of the second housing has a wall portion abutting against a prescribed position of the coil terminal, and functioning as the escape-stopping portion.
5. An electromagnetic contact device according to claim 1 , wherein the press-fitted portion includes a portion having a width narrower than other portions thereof, and the engaging walls include step portions respectively formed on inner faces thereof to contact the narrow portion in the press-fit space.
6. An electromagnetic contact device according to claim 1 , wherein the engaging teeth respectively include a plurality of teeth portions formed on the side portions thereof.