Switch

Patent metadata

Field	Value
Publication number	US-9997315-B2
Application number	US-201514877608-A
Country	US
Kind code	B2
Filing date	Oct 7, 2015
Priority date	Oct 8, 2014
Publication date	Jun 12, 2018
Grant date	Jun 12, 2018

Abstract

A magnetic type switch may include a magnet having a magnetic pole face arranged to face a magnetic body provided in an object. A change in magnetic field due to a change in distance between the magnetic body and the magnet by an operation of the object may be detected to output a signal for indicating at lease one of a presence and an absence of the operation of the object. The switch may also include a casing in which the magnet may be disposed, where the casing may have a facing part between the magnet pole face of the magnet and the magnetic body. The switch may further include a protector member formed of a non-magnetic body having a predetermined thickness in a direction vertical to the magnetic pole face, where the protector member maybe attached to the casing to cover at least the facing part.

First claim

What is claimed is:

1. A magnetic type switch comprising:
a magnet having a magnetic pole face arranged to face a magnetic body provided in an object, wherein a change in magnetic field due to a change in distance between the magnetic body and the magnet by an operation of the object is detected to output a signal for indicating at least one of a presence and an absence of the operation of the object;
a casing in which the magnet is disposed, the casing having a facing part between the magnet pole face of the magnet and the magnetic body; and
a protector member formed of a non-magnetic body having a predetermined thickness in a direction vertical to the magnetic pole face, the protector member being attached to the casing to cover at least the facing part with the protector member;
wherein the protector member is formed of an elastic deformable material.

2. The magnetic type switch according to claim 1 , wherein the magnet includes a north pole formed in a cubic shape having a predetermined width, and a south pole formed in a cubic shape having a width narrower than the width of the north pole.

3. The magnetic type switch according to claim 1 , wherein the casing includes an accommodation part having an opening at an opposite end to the facing part, and an enclosing part to close the opening of the accommodation part.

4. The magnetic type switch according to claim 3 , further comprising a support plate defining a through hole, and a clip having a tubular part inserted in the through hole of the support plate, a collar part that abuts a face of the support plate around the through-opening, and an engaging part provided on an outer periphery of the tubular part that makes press-contact with an inner periphery of the through hole to prevent the clip from dropping out of the support plate, wherein the clip is configured to engage with the accommodation part of the casing to prevent the casing from dropping out of the support plate.

5. The magnetic type switch according to claim 4 , wherein the tubular part of the clip includes at least two screw groove parts on an inner periphery thereof, and the accommodation part of the casing includes at least two screw parts on an outer periphery thereof, such that the casing is capable of being inserted in the tubular part of the clip in a state where the screw groove parts and the screw parts in the circumferential direction are shifted in phase from each other, and when the casing is rotated, the screw parts and the screw groove parts mesh to prevent the casing from dropping out of the support plate.

6. The magnetic type switch according to claim 1 , further comprising a print board having a hall element, and a magnet holding member in a tip of which the magnet is insert-molded.

7. The magnetic type switch according to claim 6 , further comprising a first yoke and a second yoke inserted-molded in the magnet holding member, wherein the first yoke is in a square pillar shape and provided in parallel to the magnetic pole face, and has an end part that projects closer to the board than the magnet and faces the hall element, wherein the second yoke is provided in parallel to a longitudinal axis of the casing, and wherein the first yoke and the second yoke oppose each other with the hall element positioned therebetween.

8. A brake pedal assembly comprising:
a brake pedal having a base part, an operating part, and a magnetic body extending from the base part; and
a magnetic type switch, including:
a magnet having a magnetic pole face arranged to face the magnetic body of the brake pedal, wherein a change in magnetic field due to a change in distance between the magnetic body and the magnet by an operation of the brake pedal is detected to output a signal for indicating at least one of a presence and an absence of the operation of the brake pedal
a casing in which the magnet is disposed, the casing having a facing part between the magnet pole face of the magnet and the magnetic body; and
a protector member formed of a non-magnetic body having a predetermined thickness in a direction vertical to the magnetic pole face, the protector member being attached to the casing to cover at least the facing part with the protector member.

9. A magnetic type switch comprising:
a magnet having a magnetic pole face arranged to face a magnetic body provided in an object, wherein a change in magnetic field due to a change in distance between the magnetic body and the magnet by an operation of the object is detected to output a signal for indicating at least one of a presence and an absence of the operation of the object;
a casing in which the magnet is disposed, the casing having a facing part between the magnet pole face of the magnet and the magnetic body;
a protector member formed of a non-magnetic body having a predetermined thickness in a direction vertical to the magnetic pole face, the protector member being attached to the casing to cover at least the facing part with the protector member; and
a print board having a hall element, and a magnet holding member in a tip of which the magnet is insert-molded.

10. The magnetic type switch according to claim 9 , further comprising a first yoke and a second yoke inserted-molded in the magnet holding member, wherein the first yoke is in a square pillar shape and provided in parallel to the magnetic pole face, and has an end part that projects closer to the board than the magnet and faces the hall element, wherein the second yoke is provided in parallel to a longitudinal axis of the casing, and wherein the first yoke and the second yoke oppose each other with the hall element positioned therebetween.

Assignees

• Valeo Japan Co Ltd

Inventors

• Shimada Hiroyuki

Classifications

• H01H9/02

  Bases, casings, or covers (accommodating more than one switch or a switch and another electrical component H02B1/26) · CPC title

• H01H36/02 Primary

  actuated by movement of a float carrying a magnet · CPC title

• B60T7/06

  Disposition of pedal · CPC title

• B60T17/22 Primary

  Devices for monitoring or checking brake systems; Signal devices · CPC title

• H01H36/002

  Actuation by moving ferromagnetic material, switch and magnet being fixed · CPC title