Kabushiki Kaisha Saginomiya Seisakusho

Saginomiya Seisakusho, Inc.

Kenichi Matsuyama

Satoshi Miyakawa

Yoshihiro Hamabe

Ysohihiro Hamabe

Gen Katsuki

A capacitance-detection pressure switch and pressure sensor that, in the connection between a diaphragm used as one electrode and a signal line for detecting a signal from the diaphragm, can ensure stable conduction without exerting an influence on operating characteristics of the diaphragm. A capacitance-detection type pressure switch of the present invention includes a metallic diaphragm that is displaced in response to a change in pressure of an operating medium supplied from a conduit, a movable electrode connected electrically to the diaphragm, a fixed electrode provided at an atmospheric pressure side of the diaphragm opposing the conduit, and an insulating film ensuring insulation between the fixed electrode and the diaphragm, wherein an electrode contact portion for connection to the movable electrode is formed as at least one projection extending toward an exterior on a part of the outer periphery of the diaphragm.

Capacitance-detection type pressure switch and pressure sensor

In a method of manufacturing a diaphragm with a contact, contact stocks each forming a movable contact on a stock formed out of a strip-shaped thin metal sheet material, or a rolled material are bonded at predetermined intervals to the stock by resistance welding, for example to form a diaphragm stock with a contact. Next, the stock of a diaphragm with a contact is subjected to continuous blanking with a predetermined diameter from each movable contact as center to produce a diaphragm with a contact.

Pressure switch and method of forming a diaphragm therein

A pressure switch is disclosed. The pressure switch includes a housing and a pressure-receiving chamber that communicates with a duct to which an operating pressure is supplied. The pressure switch also includes a diaphragm assembly with a diaphragm that is displaced in response to a pressure inside the pressure-receiving chamber. The pressure switch also includes a movable contact that comes into contact with a fixed contact accommodated in a center portion of an inside of the housing when the pressure inside the pressure-receiving chamber is above a certain value. One of the movable contact and the fixed contact has radially diverging contact faces that are arranged such that contact between the fixed contact and the moveable contact can be established with at least two of the radially diverging contact faces at the same time.

Pressure switch

The present invention provides a swaging structure having a high pressure resistance strength suitable for a high pressure switch that solves the conventional disadvantages that the swaging for providing an increased thickness causes a manufacturing facility having a larger size or the swaged part having winkles or that a pressure switch finds a difficulty in the adjustment of the swaging margin when the number of diaphragms is changed for example. A swaging structure comprises at least a to-be-swaged member required to have airtightness to a surrounding environment and a swaging member configured to retain the to-be-swaged member by a swaging processing, the swaging member has an annular side wall surrounding the to-be-swaged member to retain the to-be-swaged member after the swaging processing and the swaging structure further includes an annular spacer including therein a penetration hole to be sandwiched between the to-be-swaged member and the annular side wall after the swaging processing.

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Tokorozawa, Japan

Kenichi Matsuyama