Electric motor having SMD components and associated connection component
An electric motor includes a plurality of SMD components arranged on a carrier of the motor, and a connection part for the SMD components together with an electrically conductive housing part of the motor. A contact spring electrically connects a plurality of SMD components to the housing part. The contact spring has a main section, a spring-type connection section that extends outwards from one side of the main section, and at least one spring-type contact section that extends outwards from the other side of the main section. The spring-type connection section of the contact spring includes a plurality of contact fingers for the SMD components.
1. An electric motor comprising:
a support ( 6 ) having recesses or chambers;
a plurality of SMD components ( 5 ) arranged in the recesses or chambers of the support ( 6 );
an electrically conductive housing part;
a connection part connecting the SMD components ( 5 ) to the electrically conductive housing part, the connection part being configured as a contact spring ( 10 ) clamped on the support ( 6 ), and the connection part electrically connecting the plurality of SMD components ( 5 ) to the electrically conductive housing part, the contact spring ( 10 ) having:
a main section ( 1 ),
a resilient connection section, which extends from a first side of the main section ( 1 ), for contacting the SMD components ( 5 ), and
at least one resilient contact section ( 3 ), which extends from a second side of the main section ( 1 ), for electrical connection to the electrically conductive housing part,
wherein the resilient connection section of the contact spring ( 10 ) comprises a plurality of contact fingers ( 2 ) for contacting respective ones of the SMD components ( 5 ), which contact fingers ( 2 ) engage into the individual recesses or chambers of the support ( 6 ) and come into contact with the SMD components ( 5 ) arranged in the recesses or chambers,
wherein the at least one resilient contact section ( 3 ) comprises two legs extending on the second side of the main section ( 1 ), the two legs each having a fixing clamp ( 7 ), each of which, when the contact spring ( 10 ) is located on the support ( 6 ), digs into the support ( 6 ) to affix the contact spring ( 10 ) to the support ( 6 ), and
wherein each leg of the at least one resilient contact section ( 3 ) has divided first and second finger-shaped sections ( 4 ), each first finger-shaped portion being contoured so as to contact the electrically conductive housing part, and each second finger-shaped portion being contoured to contact the support ( 6 ).
2. The electric motor as claimed in claim 1 , wherein the electrically conductive housing part is a housing outer wall ( 8 ) of the electric motor.
3. The electric motor as claimed in claim 1 , wherein the support ( 6 ) is a brush holder of the electric motor.
4. The electric motor as claimed in claim 1 , wherein the support ( 6 ) consists of an insulating plastic.
5. The electric motor as claimed in claim 1 , wherein the SMD components ( 5 ) are electrically conductively fixed on the contact fingers ( 2 ) by clamping and/or soldering or conductive adhesion.
6. The electric motor as claimed in claim 1 , wherein the main section ( 1 ) of the contact spring ( 10 ) comprises at least one fixing clamp ( 7 ) on the side of the contact finger ( 2 ) for the SMD components ( 5 ) and/or on the side of the at least one contact section ( 3 ) for the electrically conductive housing part.
7. The electric motor as claimed in claim 1 , wherein an insulating protective wall for avoiding short circuits is arranged between adjacent SMD components ( 5 ).
8. A contact spring ( 10 ) for connecting a plurality of SMD components ( 5 ) arranged on a support ( 6 ) of an electric motor to an electrically conductive housing part of the electric motor, the contact spring ( 10 ) comprising:
a main section ( 1 );
a resilient connection section extending from a first side of the main section ( 1 ); and
at least one resilient contact section ( 3 ) extending from a second side of the main section ( 1 ),
wherein the resilient connection section of the contact spring ( 10 ) comprises a plurality of contact fingers ( 2 ) for contacting respective ones of the SMD components ( 5 ),
wherein the at least one resilient contact section ( 3 ) comprises two legs extending on the second side of the main section ( 1 ), the two legs each having a fixing clamp ( 7 ), each of which is configured to, when the contact spring ( 10 ) is located on the support ( 6 ), dig into the support ( 6 ) to affix the contact spring ( 10 ) to the support ( 6 ), and
wherein each leg of the at least one resilient contact section ( 3 ) has divided first and second finger-shaped sections ( 4 ), each first finger-shaped portion being contoured so as to contact the electrically conductive housing part, and each second finger-shaped portion being contoured to contact the support ( 6 ).
9. The contact spring ( 10 ) as claimed in claim 8 , wherein the main section ( 1 ) is U-shaped, the U-shaped main section having a first leg, from which the contact fingers ( 2 ) extend.
10. The contact spring ( 10 ) as claimed in claim 8 , wherein the contact spring ( 10 ) is clampable on the support ( 6 ) of the electric motor.