Vehicle roof mount antenna
First Claim
1. A vehicle roof mount antenna comprising:
- an antenna rod;
an antenna base to which the antenna rod is attached in a manner so that the antenna rod is swivelable;
a joint portion which is provided at one end of the antenna rod and which comprises a cylindrical member having an axial direction orthogonal to an axial direction of the rod;
a pair of first and second pivotal support portions provided to confront an upper portion of the antenna base to mount the joint portion on a pivot in a swiveling manner;
a bolt and a nut which are inserted into a through hole provided in the first one of the pair of the pivotal support portions, which pierce the joint portion and the second one of the pair of pivotal support portions, and which are fastened together; and
a spring mechanism which is provided with respect to the joint portion in the antenna base, and which automatically returns the joint portion and the antenna rod to a predetermined swiveling position in accordance with an elasticity of the spring mechanism, even if a swiveling position of the joint portion and the antenna rod is changed by an external force applied to the antenna rod.
1 Assignment
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Accused Products
Abstract
The present invention includes an antenna rod, an antenna base which attaches the antenna rod so as to be capable of swiveling, a joint assembly which consists of a cylindrical member in an axial direction orthogonal to an axial direction of the rod at one end of the antenna rod, a pair of pivotal support portions provided so as to confront an upper portion of the antenna base so as to mount the joint assembly on a pivot in a swiveling manner, and a torsion spring which is provided with respect to the joint assembly and automatically returns the joint assembly to a predetermined swiveling position by giving the elasticity of itself even if a swiveling position of the joint assembly is changed due to an external force applied to the antenna rod.
28 Citations
14 Claims
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1. A vehicle roof mount antenna comprising:
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an antenna rod;
an antenna base to which the antenna rod is attached in a manner so that the antenna rod is swivelable;
a joint portion which is provided at one end of the antenna rod and which comprises a cylindrical member having an axial direction orthogonal to an axial direction of the rod;
a pair of first and second pivotal support portions provided to confront an upper portion of the antenna base to mount the joint portion on a pivot in a swiveling manner;
a bolt and a nut which are inserted into a through hole provided in the first one of the pair of the pivotal support portions, which pierce the joint portion and the second one of the pair of pivotal support portions, and which are fastened together; and
a spring mechanism which is provided with respect to the joint portion in the antenna base, and which automatically returns the joint portion and the antenna rod to a predetermined swiveling position in accordance with an elasticity of the spring mechanism, even if a swiveling position of the joint portion and the antenna rod is changed by an external force applied to the antenna rod. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
a coil spring attached in such a manner that an axial direction thereof is parallel to a radial direction of a swiveling surface of the joint portion;
a slide member having a first end in contact with the coil spring and to which a force is given by elasticity of the coil spring; and
a slide wall with which a second end of the slide member is in contact, which is formed in the antenna base, and which has a shape which weakens the elasticity of the coil spring to a lowest level when a swiveling angle of the joint portion is set at a predetermined position.
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13. The vehicle roof antenna according to claim 12, wherein the spring mechanism also includes a holding mechanism which maintains the joint portion at a position where the swiveling angle of the joint portion is set at a predetermined position.
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14. The vehicle roof antenna according to claim 1, wherein the spring mechanism includes a holding mechanism which maintains the joint portion at a position where a swiveling angle of the joint portion is set at a predetermined position.
Specification