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Point-push spring, sheet with point-push spring and switch device

A thin sheet with dot technology, which is applied in the field of click springs, sheets with click springs, and switch devices, can solve problems such as vacuum adsorption obstruction, metal powder damage, and magnetic sensors cannot correctly detect the surrounding magnetic field, etc., to achieve simple assembly operations , The effect of preventing damage to the contact reliability

Inactive Publication Date: 2008-04-09
ALPS ALPINE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In this way, since the conventional movable contact made of stainless steel is a magnetic body, it is easily magnetized during storage or transportation before being incorporated into the switchgear, for example, it will hinder the vacuum suction when incorporating, Or absorb metal powder after assembly to damage the contact reliability
In particular, in a mobile phone with an electronic compass incorporating a geomagnetic sensor, there is a problem that the magnetic sensor cannot accurately detect the surrounding magnetic field due to the magnetic influence of the movable contact incorporated in the switch device.

Method used

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  • Point-push spring, sheet with point-push spring and switch device
  • Point-push spring, sheet with point-push spring and switch device
  • Point-push spring, sheet with point-push spring and switch device

Examples

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Embodiment Construction

[0026] Hereinafter, embodiments of the present invention will be described with reference to the drawings. figure 1 is an exploded perspective view of the switchgear of the first embodiment of the present invention, figure 2 is a sectional view of the main part of the switchgear, image 3 It is an explanatory diagram showing the manufacturing process of a sheet with a movable contact used in the switchgear, Figure 4 It is a plan view of the sheet with a movable contact.

[0027] like figure 1 As shown, the switch device of this embodiment includes: a circuit substrate 2 having a plurality of fixed contacts 1, a plurality of movable contacts 3 placed on the circuit substrate 2, and an adhesive sheet 4 holding each movable contact 3, The adhesive sheet 4 is composed of a top sheet 5 and a spacer 6 having a laminated structure. In addition, this switch device is arranged in an unshown case of a mobile phone with an electronic compass, and a plurality of operation keys (not...

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Abstract

The invention provides a click spring and a sheet having the click spring that can be assembled easily and have high contact reliability, and also to provide a switch device that does not adversely and magnetically affect an earth magnetic sensor incorporated in electronic equipment. In the switch device for performing the switching operation of a contact by allowing a dome-like movable contact 3 to contact and separate from a center fixed contact 1b provided on a circuit board 2, the movable contact 3 is formed by a nonmagnetic stainless steel material with SUS 305 as a raw material, thus setting the relative permeability to 1.01 or smaller, preventing the movable contact 3 from magnetically and poorly affecting the earth magnetic sensor 7 mounted nearby, preventing metal powder from being attracted by the movable contact 3 before assembling to the switch device, and hence preventing contact reliability from decreasing by the attraction of the metal powder.

Description

technical field [0001] The present invention relates to a switch device suitable for use in electronic equipment such as a mobile phone, a click spring used as a movable contact of the switch device, and a sheet with a click spring. Background technique [0002] A plurality of dial keys, function keys, etc. are arranged on the operation panel of the mobile phone, and when the user selectively presses and operates these keys, an internal switch device is turned on. This switch device has a fixed contact provided on an insulating substrate and an arch-shaped movable contact called a click spring. The movable contact is placed on the insulating substrate and faces the fixed contact. Furthermore, when the pressing force is not applied to the movable contact from the key, the movable contact is separated from the fixed contact due to its own restoring force and maintains an open state. When the pressing force is applied to the movable contact from the key, the pressing force make...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H13/52H01H13/26H01H13/702H01H5/30H01H11/00H01H13/70
CPCA61L9/00B32B2307/416E01F9/604
Inventor 草野太荣岩间尚也吉田敏博
Owner ALPS ALPINE CO LTD
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