JPH0314810U

JPH0314810U -

Info

Publication number: JPH0314810U
Application number: JP7524389U
Authority: JP
Priority date: 1989-06-27
Filing date: 1989-06-27
Publication date: 1991-02-14
Anticipated expiration: 2004-06-27
Also published as: JPH0713288Y2

Description

[Brief explanation of the drawing]

第１図ａ，ｂは本考案の一実施例を示す図で、
同図ａは電動伸縮アンテナ用クラツチの断面図、
同図ｂは同図ａのＢ−Ｂ線矢視断面図、第２図ａ
，ｂは同実施例のクラツチ力の特性を従来例と対
比して示した図、第３図ａ，ｂは従来例の構成を
示す図である。１１……第１の回転体、１２……第２の回転体
、１２ａ……ドライブギヤ、１２ｂ……周壁内面
、１２ｃ……係合溝、１３ａ，１３ｂ……突起、
１４ａ，１４ｂ……扇形摺接部材、１５ａ，１５
ｂ……弾性体、１６ａ，１６ｂ，１７ａ，１７ｂ
……凹部、１８……係合部材、１８ａ……係合ピ
ン、１８ｂ……コイルばね、１９……収容凹部。 Figures 1a and 1b are diagrams showing an embodiment of the present invention,
Figure a is a cross-sectional view of a clutch for an electric telescopic antenna.
Figure b is a sectional view taken along the line B-B in Figure a, Figure 2a
, b are diagrams showing the clutch force characteristics of the same embodiment in comparison with a conventional example, and FIGS. 3a and 3b are diagrams showing the configuration of the conventional example. DESCRIPTION OF SYMBOLS 11... First rotating body, 12... Second rotating body, 12a... Drive gear, 12b... Inner surface of peripheral wall, 12c... Engagement groove, 13a, 13b... Protrusion,
14a, 14b...fan-shaped sliding contact member, 15a, 15
b...Elastic body, 16a, 16b, 17a, 17b
... recess, 18 ... engagement member, 18a ... engagement pin, 18b ... coil spring, 19 ... accommodation recess.

Claims

[Scope of utility model registration request]

a first rotary body having a disc shape;
a bottomed cylindrical second rotating body which is arranged concentrically with the rotating body and has an engaging portion that is uneven along the circumferential direction on the inner surface of the peripheral wall; A circular arc surface that is rotatably mounted on one side surface of the second rotating body facing the open end thereof and whose outer circumferential surface is in sliding contact with the inner surface of the circumferential wall of the second rotating body. a plurality of fan-shaped sliding contact members; and an elastic body compressively elastically mounted between the sliding contact members so that each arcuate surface of the plurality of fan-shaped sliding contact members is brought into pressure contact with the inner surface of the peripheral wall of the second rotating body. and,
An engagement provided in the fan-shaped sliding member such that a portion thereof protrudes from at least one arcuate surface of the sliding member that is pressed into contact with the inner surface of the peripheral wall by the elastic body and can be pressed and engaged with the engaging portion. a member, and either the first rotating body or the second rotating body is a driving clutch plate coupled to the motor side,
A clutch for an electric telescopic antenna, characterized in that the other side is a driven clutch plate coupled to the antenna side.