Solenoid

Patent metadata

Field	Value
Publication number	US-10896777-B2
Application number	US-201716086336-A
Country	US
Kind code	B2
Filing date	Feb 28, 2017
Priority date	Apr 28, 2016
Publication date	Jan 19, 2021
Grant date	Jan 19, 2021

Abstract

A shaft outputs a thrust force in an axial direction by using a magnetic flux caused by an electric current flowing through a coil. A housing is made of resin and retains the shaft. The housing has a base portion having an outer circumferential surface, which is configured to be entirely in contact tightly with a sealing member. The housing further has a distal portion having an outer circumferential surface defining a depression. The outer circumferential surfaces of the base portion and the distal portion are substantially equal in diameter and are formed continuously.

First claim

The invention claimed is:

1. A solenoid comprising:
a shaft configured to output a thrust force in an axial direction by using a magnetic flux caused by an electric current flowing through a coil; and
a housing made of resin in a tubular shape and retaining the shaft, wherein
the housing has a base portion having an outer circumferential surface, which is configured to be in contact tightly with a sealing member, and a distal portion having an outer circumferential surface defining a depression, and
the outer circumferential surfaces of the base portion and the distal portion are substantially equal in diameter and are formed continuously.

2. The solenoid according to claim 1 , wherein
the depression defined in the outer circumferential surface of the distal portion extends in the axial direction, and
the depression opens in the outer circumferential surface of the distal portion and further opens in a distal end surface of the distal portion in the axial direction.

3. The solenoid according to claim 1 , wherein diameters of the outer circumferential surfaces of (i) the base portion, (ii) at least a part of the distal portion, and (iii) a portion of the housing extending entirely between the base portion and the at least a part of the distal portion in the axial direction are uniform.

4. The solenoid according to claim 3 , wherein the outer circumferential surface of the distal portion includes another part which is tapered.

5. The solenoid according to claim 4 , wherein the at least a part of the distal portion is closer to the base portion in the axial direction than the another part of the distal portion which is tapered.

6. The solenoid according to claim 1 , wherein the sealing member is a rubber O-ring in direct contact with the outer circumferential surface of the base portion.

7. The solenoid according to claim 1 , wherein the outer circumferential surface of the base portion is an outer circumferential side surface of the base portion, the outer circumferential side surface of the base portion being in direct contact with the sealing member.

8. A solenoid comprising:
a shaft configured to output a thrust force in an axial direction by using a magnetic flux caused by an electric current flowing through a coil; and
a housing made of resin in a tubular shape and retaining the shaft, wherein
the housing has a base portion having an outer circumferential surface, which is configured to be in contact tightly with a sealing member, and a distal portion having an outer circumferential surface including (i) a tapered surface reduced in diameter gradually toward an end and (ii) another surface, and
the outer circumferential surface of the base portion and the outer circumferential surface of the another surface of the distal portion are substantially equal in diameter and are formed continuously.

9. The solenoid according to claim 8 , wherein the distal portion of the housing define at least one depression.

10. The solenoid according to claim 8 , wherein
the distal portion has a depression that extends in the axial direction, and
the depression opens in the outer circumferential surface of the distal portion and further opens in a distal end surface of the distal portion in the axial direction.

11. The solenoid according to claim 8 , wherein (i) the diameter of the outer circumferential surface of the base portion, (ii) the diameter of outer circumferential surface of the another surface of the distal portion, and (iii) the diameter of a portion of the housing extending entirely between the base portion and the another surface of the distal portion in the axial direction are uniform.

12. The solenoid according to claim 11 , wherein the another surface of the distal portion is closer to the base portion in the axial direction than the tapered surface of the distal portion.

13. The solenoid according to claim 8 , wherein the sealing member is a rubber O-ring in direct contact with the outer circumferential surface of the base portion.

14. The solenoid according to claim 8 , wherein the outer circumferential surface of the base portion is an outer circumferential side surface of the base portion, the outer circumferential side surface of the base portion being in direct contact with the sealing member.

15. The solenoid according to claim 8 , wherein the depression defined in the distal portion of the housing is defined in the outer circumferential surface of the distal portion of the housing.

Assignees

• Denso Corp

Inventors

• Arao Masashi
• Ota Atsushi

Classifications

• H01F7/06

  Electromagnets; Actuators including electromagnets {(electric coils H01F5/00; devices for holding workpieces using electric force B23Q3/15; load-engaging elements for lifting articles electromagnetically B66C1/06; electromagnetic couplings F16D27/00; magnetic brakes F16D63/002; electromagnetically operated valves F16K11/24, F16K31/00; analysing materials by magnetic means G01N27/72, G01N27/80; electromagnets for winding mechanical clocks G04C1/02; electromagnetic relays H01H51/00; windings for salient poles of dynamo-electric machines H02K3/18; electromagnets for telegraphic communication H04L; for arc lamps H05B31/28)} · CPC title

• H01F7/128

  Encapsulating, encasing or sealing · CPC title

• F16K31/06

  using a magnet {, e.g. diaphragm valves, cutting off by means of a liquid} · CPC title

• H01F7/129 Primary

  of armatures · CPC title

• H01F2007/086

  Structural details of the armature · CPC title