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Opening and closing device

A technology of opening and closing device and coil spring, which is applied in the direction of telephone structure, telephone communication, electrical components, etc., can solve problems such as reducing the smoothness of opening and closing operation, and achieve stable opening and closing operation tactile feeling and opening and closing position, and large operation. load effect

Inactive Publication Date: 2005-02-02
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, if it is the structure disclosed in Japanese Patent Laid-Open No. 2002-89542, when the stability of the opening and closing state is to be improved, the smoothness of the opening and closing operation will be reduced.

Method used

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Examples

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Embodiment Construction

[0010] First, use image 3 ~ FIG. 5 demonstrates a comparative example.

[0011] In addition, the cross-sectional views in these figures are shown enlarged in the radial direction in order to clarify the relationship between the fixed cam and the movable cam.

[0012] Such as Figure 4 As shown in FIG. 5, a substantially cylindrical fixed body 1 has a fixed portion 1A on the left side, and a fixed cam 2 on the outer periphery of the right side. Out of the two inclined parts 2B, 2C constitute.

[0013] Further, the substantially cylindrical movable body 3 , which is rotatably arranged in the opening and closing direction with respect to the fixed body 1 , has a movable cam 4 on the outer periphery of the left side facing the fixed body 2 . A helical spring 6 is installed in a slightly compressed state between the slightly disc-shaped cover portion 5 and the fixed body 3, Figure 4 In the case of , the spring 6 elastically contacts the tip of the movable cam 4 to the incline...

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PUM

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Abstract

An opening and closing device is structured so that a first spring and a second spring having different outer diameters are provided. The first spring having a larger outer diameter surrounds the second spring having a smaller diameter, and these springs urge a rotor. This structure can provide an opening and closing device that has a large operating load even within limited dimensions and shapes of the springs and a proper feel of operating and closing operation, and is more positively held in operating and closing positions.

Description

technical field [0001] The present invention relates to opening and closing devices used in various electronic devices such as mobile phones and personal computers. Background technique [0002] In recent years, as electronic devices such as mobile phones and personal computers have become more functional and diversified, foldable electronic devices in which a movable case is opened and closed relative to a fixed case have increased. Therefore, for the opening and closing devices used in these electronic devices as shown in JP-A-2002-89542, higher requirements are placed on performances such as good tactile opening and closing operations and stable maintenance of opening and closing positions. [0003] However, according to the structure disclosed in JP 2002-89542, when the stability of the opening and closing state is to be improved, the smoothness of the opening and closing operation will be reduced. Therefore, there is a need for an opening and closing device that can sa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C11/10F16C11/04H04M1/02
CPCH04M1/0216
Inventor 南胜一阿部芳晴
Owner PANASONIC CORP
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