Omron Tateisi Electronics Co.

Omron Corporation

Takezo Sano

Kozo Maenishi

Takashi Tanaka

Kenichi Tsuruyoshi

Tsutomu Shimizu

Takashi Niwa

Sueaki Honda

Hirofumi Koga

Toshiki Tanaka

Shuichi Kashimoto

Keiji Genma

Shigenobu Sato

Isao Kato

Toyohiro Nagahara

Kunio Nagata

Satoshi Nozoe

Shoji Kazusaka

Junzo Asa

Saburou Morita

An electromagnetic relay having an electromagnetic block with a roughly U-shaped iron core formed with a pair of bent opposing magnetic poles at both the ends thereof and with a coil wound therearound via a spool; and an armature block with both ends thereof opposing the magnetic poles and with the middle portion thereof pivotally supported. A permanent magnet is disposed between the two opposing magnet poles of the iron core so as to oppose said armature. The permanent magnet is supported by a support member formed integral with the spool of the electromagnetic block. The armature is pivotally supported by the electromagnetic block.

Electromagnetic relay

An electric switch for a power tool, comprising: a slider slidably received in a switch casing along a longitudinal direction, a handle provided in the grip of the power tool for manually actuating the slider along the longitudinal direction; a plurality of fixed contact pieces arranged in an internal bottom surface of the switch casing and provided with contact surfaces located substantially in a same plane; and a plurality of moveable contact pieces arranged in the bottom surface of the slider and urged toward the fixed contact pieces by spring members so as to selectively contact at least some of the contact surfaces of the fixed contact pieces. The contact portions of this switch achieve various conductive states by planar arrangement and movement of the contact pieces, the component parts can be fitted into a small switch casing, particularly having a small height. Since the component parts may be assembled one over the other in sequential manner without requiring special efforts, a substantial advantage can be gained in the improvement of the efficiency of the assembling process. And, these advantages can be gained without diminishing the reliability of the various states of contact between the various contact pieces.

Electric switch for a power tool

A microswitch in which a good snap action feeling is obtained and an operating stroke is large is provided. Included in the microswitch is a swingable lever which is pushed by a pressing projection of a push button swingably pivotally supported. One end of the lever is pivotally supported and the other end is coupled with one end of a movable member having a movable contact. The movable member is biased by a spring in one direction.

Microswitch

A microswitch in which a good snap action feeling is obtained and an operating stroke is enhanced is provided. A compession spring is interposed between a movable member and a swingable lever which are respectively pivotaly supported at close positions. The swingable lever is operated by a push button which is vertically slidable. Further, restricting plates to restrict the motion in the width direction of the movable member are attached to the push button. A positioning member to hold the swingably lever to the position which faces the push button when the microswitch is assembled is also provided.

A polarized relay with an electromagnetic drive comprises an electromagnetic yoke composed of a core wound with a coil and a yoke body, and having one end portion of one magnetic polarity and a pair of bifurcated end portions of the other magnetic polarity opposite to the one magnetic polarity. The bifurcated end portions are separated in opposition from each other. The one end portion of the yoke is disposed between the bifurcated end portions so as to cooperate to form a pair of working gaps. A movable block of a substantially C-like configuration incorporating a permanent magnet has two magnetic pole pieces which are disposed within the working gaps, respectively. Guide is provided for guiding the movable block in response to energization and deenergization of the coil so that the pole pieces are movable within the respective working gaps. A contact mechanism including movable contacts is mechanically coupled to the movable block to make or break circuit.

Electromagnetic drive and polarized relay

An electromagnetic relay includes a moving block assembly which is selectively attracted by the energization of the electromagnet in the relay and moves in a direction perpendicular to the axis of an iron core within the electromagnet, thus actuating a movable contact support. The moving block and the movable contact support slide together, thus preventing wobbling of the movable block assembly within the relay.

Electromagnetic relay with linearly moving block assembly

This electromagnetic relay includes: a base assembly; an electromagnetic block assembly, mounted to the base, including an iron core and an electromagnetic coil wound around the core; a movable block assembly, which is selectively attracted by the electromagnetic block assembly according to energization of the electromagnetic coil thereof, and is movable along a direction perpendicular to the axial line of the iron core; a contact mechanism including a movable contact support member actuated by the movement of the movable block assembly, a movable contact mounted to the movable contact support member near one extremity thereof, a fixed terminal member supporting the movable contact support member from the base assembly near another extremity thereof, a fixed contact support member mounted to the base assembly opposing the movable contact support member, and a fixed contact mounted to the fixed contact support member opposing the movable contact; a means for guiding the movable block assembly along the aforesaid direction perpendicular to the axial line of the iron core; a projection formed on a surface of the movable block assembly facing the base assembly; and a guide projection wall, extending from the base assembly, along a surface formed on which the projection slides; the movable block assembly being engaged to the movable contact support member so as to be substantially fixed thereto with regard to mutual movement along the axial direction of the movable contact support member. Thereby, wobbling of the movable block assembly is prevented.

Method of manufacture of base assembly for an electromagnetic relay

A polarized electromagnetic relay apparatus for assembling a coil spool with a terminal carrying base plate is disclosed. The coil spool assembly has a front collar with a projecting piece. The projecting piece is adapted to engage with a latch hole in the terminal carrying base plate. The terminal carrying base plate has jaw-like, offset portions which engage with supporting offset portions formed in the rear collar of the coil spool assembly. The flexible projecting pieces may be of deformable material in order to easily engage with the latch hole of the base plate. The flexible projecting pieces can be tapered, also to facilitate engagement with the base plate latch hole. A terminal holder is formed on the rear collar of the coil spool assembly and is adapted to receive terminals from the coil. The terminal holder comprises the supporting offset portions which engage with the jaw-like offset portions of the base plate. The terminal holder is of a greater thickness than the base plate.

A molding method and apparatus in which an insert part is supported in a mold cavity by a pin. The pin is withdrawn when the resin pressure in the mold exceeds a predetermined value.

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Shiga, Japan

Takezo Sano