Patent ID: 11874300
Assignee: NHK SPRING CO., LTD.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 11:
12. A contact probe comprising:
a first contact member configured to contact a first contact target;
a second contact member configured to
contact a second contact target, and
house at least a portion of the first contact member; and

a spring member configured to couple the first contact member and the second contact member in a manner capable of expansion/contraction with both end parts of the spring member, wherein
the spring member is wound in a helical shape, and at least a diameter of an outer circumference in one of the end parts held by the second contact member is larger than diameters of other portions,
a diameter of an inner circumference of an end part of the second contact member on a side housing the first contact member is equal to or larger than a maximum diameter of the first contact member,
the first contact member comprises:
a first tip part configured to contact the first contact target; and
a first cylindrical part extending from the first tip part in a cylindrical shape, and

the second contact member comprises:
a second tip part configured to contact the second contact target; and
a second cylindrical part extending from the second tip part and having a cylindrical shape with an inner circumference having a uniform diameter, and

the spring member is positioned in a hollow space formed with the first and the second cylindrical parts.