Electrically conductive contact member for a printed circuit board
View Patent ↗A contact member formed with a flat metal structure and an integrated elastomeric body. The contact member can be used to ground a printed circuit board (PCB) with a surrounding housing. The housing loads the contact member in a direction perpendicular to the face of the PCB. The elastomeric body supports the flat metal structure during repeated cycles of loading and unloading of the contact member. The elastic resiliency of the elastomeric body can help to reduce the effects of plastic deformation of the contact member, resulting in more reliable electrical connections a source outside of the PCB. And the elastomeric body does not require adhesive or separate fixing devices to hold it in place.
1. A contact member comprising:
a thin sheet conductive member, and
an elastomeric body,
wherein the thin sheet member comprises;
a base part of which at least a portion can be mounted to a surface of a printed circuit board;
a contact part which is provided to establish an electrical connection between a contact element and the surface of the printed circuit board; and
a supporting spring part which is connected to the base part and to the contact part and supports the contact part in such a manner that the contact part can be deformed in a direction perpendicular to a plane containing the portion of the base part which can be mounted to the surface of a printed circuit board;
the elastomeric body is disposed between the base part and the contact part and the elastomeric body is attached to the supporting spring part by allowing a portion of the thin sheet member to penetrate inside of the elastomeric body;
wherein the elastomeric body is provided with a cavity located at least partially between the contact part and the base part and the cavity is open to at least three surfaces or the elastomeric body.
2. The contract member according to claim 1 , wherein the elastomeric body is in contact with the contact part and the base part when the contact member is in an unloaded condition.
3. The contact member according to claim 1 , wherein the contact part comprises an attachment surface which is able to be grasped by an automatic mounting machine.
4. The contact member according to claim 3 , wherein the attachment surface and the base part are approximately parallel to each other when the contact member is in an unloaded condition, and
wherein the attachment surface maintains a substantially parallel relationship relative to the base part when the contact part is elastically deformed in the direction perpendicular to a plane containing the portion of the base part which can be mounted to the surface of a printed circuit board.
5. The contact member according to claim 1 , wherein the cavity is in substantially a shape of a trapezoid, and
wherein the cavity extends across the width of the elastomeric body,
wherein the width is defined across two opposing surfaces of the elastomeric body not directly contacting a surface of one of the components of the thin sheet member,
wherein the surface of one of the components of the thin sheet member is in a direction perpendicular to a thickness of the thin sheet member.
6. The contact member according to claim 1 , wherein the elastomeric body provides variable levels of resistance.
7. The contact member according to claim 1 , wherein a cross-section of the elastomeric body taken along a plane intersecting a length and the contact part and the base part of the contact member is a geometric shape,
wherein the length of the contact member is defined as a direction along the plane containing the portion of the base part which can be mounted to the surface of a printed circuit board from one end of a connection between the base part and the supporting spring part to an opposite end of the base part.
8. The contact member according to claim 1 , wherein the elastomeric body can be heated to at least a temperature of 260° C.
9. The contact member according to claim 7 , wherein the elastomeric body has a plurality of sides.
10. A contact member comprising:
a thin sheet conductive member, and
an elastomeric body,
wherein the thin sheet member comprises:
a base part of which at least a portion can be mounted to a surface of a printed circuit board;
a contact part which is provided to establish an electrical connection between a contact element and the surface of the printed circuit board; and
a supporting spring part which is connected to the base part and to the contact part and supports the contact part in such a manner that the contact part can be deformed in a direction perpendicular to a plane containing the portion of the base part which can be mounted to the surface of a printed circuit board;
the elastomeric body is disposed between the base part and the contact part and the elastomeric body is attached to the supporting spring part by allowing a portion of the thin sheet member to penetrate inside of the elastomeric body;
a cross-section of the elastomeric body taken along a plane intersecting a length and the contact part and the base part of the contact member is a geometric shape,
the length of the contact member is defined as a direction along the plane containing the portion of the base part which can be mounted to the surface of a printed circuit board from one end of a connection between the base part and the supporting spring part to an opposite end of the base part; and
the elastomeric body has an elliptical cross-section.
11. A contact member comprising:
a thin sheet conductive member, and
an elastomeric body,
wherein the thin sheet member comprises:
a base part of which at least a portion can be mounted to a surface of a printed circuit board;
a contact part which is provided to establish an electrical connection between a contact element and the surface of the printed circuit board; and
a supporting spring part which is connected to the base part and to the contact part and supports the contact part in such a manner that the contact part can be deformed in a direction perpendicular to a pane containing the portion of the base part which can be mounted to the surface of a printed circuit board;
the elastomeric body is disposed between the base part and the contact part and the elastomeric body is attached to the supporting spring part by allowing a portion of the thin sheet member to penetrate inside of the elastomeric body;
a cross-section of the elastomeric body taken along a plane intersecting a length and the contact part and the base part of the contact member is a geometric shape, and
the length of the contact member is defined as a direction along the plane containing the portion of the base part which can be mounted to the surface of a printed circuit board from one end of a connection between the base part and the supporting spring part to an opposite end of the base part, and the elastomeric body has a circular cross-section.
12. A contact member comprising:
a thin sheet conductive member, and
an elastomeric body,
wherein the thin sheet member comprises:
a base part of which at least a portion can be mounted to a surface of a printed circuit board;
a contact part which is provided to establish an electrical connection between a contact element and the surface of the printed circuit board; and
a supporting spring part which is connected to the base part and to the contact part and supports the contact part in such a manner that the contact part can be deformed in a direction perpendicular to a plane containing the portion of the base part which can be mounted to the surface of a printed circuit board;
the elastomeric body is disposed between the base part and the contact part and the elastomeric body is attached to the supporting spring part by allowing a portion of the thin sheet member to penetrate inside of the elastomeric body; and
the elastomeric body is provided with a hollow cavity located at least partially between the contact part and the base part and the hollow cavity is open to at least one surface of the elastomeric body and the cavity remains hollow following installation with the printed circuit board, and when an exterior force is applied to the contact part, causing movement of the contact part toward the base part, the hollow cavity is deformed and facilitates deformation of the elastomeric body and elastic deformation of the contact part and the spring part, and the elastomeric body opposes the force causing movement of the contact part toward the base part to inhibit the contact part and the spring part from being plastically deformed.
13. The contact member according to claim 12 , wherein the cavity is in a substantially cylindrical shape extending through a portion of the thickness of the elastomeric body.
14. The contact member according to claim 12 , wherein the cavity is in a substantially cylindrical shape extending through the thickness of the elastomeric body,
wherein the thickness is defined between the base part and the contact part.
15. The contact member according to claim 12 , wherein the elastomeric body has a elliptical cross-section.
16. The contact member according to claim 12 , wherein the elastomeric body has a circular cross-section.
17. The contact member according to claim 14 , wherein the cavity is only open in a substantially semi-circular shape directly beneath the contact part; and
wherein the elastomeric body is substantially flush with an upper surface of the contact part.