Bi-stable mechanical latch including positioning spheres

Patent metadata

Field	Value
Publication number	US-11710592-B2
Application number	US-201916686168-A
Country	US
Kind code	B2
Filing date	Nov 17, 2019
Priority date	Nov 17, 2019
Publication date	Jul 25, 2023
Grant date	Jul 25, 2023

Abstract

Provided herein is an improved a bi-stable actuator including a first core component coupleable to a housing, the first core component including a central bore containing a shaft and a shaft spring. The actuator may further include a second core component extending around the first core component, wherein the second core component and the first core component are axially moveable relative to one another, and a third core component extending within the second core component, wherein the third core component and the second core component are axially moveable relative to one another. The actuator may further include a positioning sphere extending through an opening of the first core component, wherein the positioning sphere abuts the second core component when the bi-stable actuator is in a first position, and wherein the positioning sphere abuts a detent of the shaft when the bi-stable actuator is in a second position.

First claim

What is claimed is:

1. A latching assembly, comprising:
a housing including an opening; and
a bi-stable actuator, comprising:
a first core component in abutment with the housing, the first core component including a central bore including a shaft and a shaft spring, wherein the shaft spring is positioned within an interior of the shaft;
a second core component extending around the first core component, wherein the second core component and the first core component are axially moveable relative to one another;
a third core component extending within the second core component, wherein the third core component and the second core component are axially moveable relative to one another, and wherein the third core component is positioned directly adjacent an interior surface of the second core component; and
a positioning sphere extending through an opening of the first core component, wherein the positioning sphere abuts the second core component when the bi-stable actuator is in a first position, and wherein the positioning sphere abuts a detent of the shaft when the bi-stable actuator is in a second position.

2. The latching assembly of claim 1 , wherein the positioning sphere is disposed within a cavity between the first core component and the second core component in the first position.

3. The latching assembly of claim 1 , the second core component comprising:
a first region having a first radial thickness between an interior surface and an exterior surface;
a second region having a second radial thickness between the interior surface and the exterior surface, wherein the second radial thickness is greater than the first radial thickness; and
a shoulder region between the first and second regions, wherein the positioning sphere is in physical contact with the shoulder region when the bi-stable actuator is in the first position.

4. The latching assembly of claim 1 , further comprising a core spring in contact with the second core component and the third core component.

5. The latching assembly of claim 4 , the second core component comprising a first end and a second end, wherein the first end is operable to engage a flange of the first core component, and wherein the second end is engaged with the core spring.

6. The latching assembly of claim 1 , wherein the first core component is concentrically disposed about a central longitudinal axis, and wherein the second core component is concentrically disposed about the first core component.

7. The latching assembly of claim 1 , further comprising one or more additional positioning spheres located along a circumference of the first core component.

8. The latching assembly of claim 1 , wherein the first core component is in abutment with an underside of the housing, and wherein the shaft extends through an opening of the housing.

9. A bi-stable mechanical latching actuator, comprising:
a first core component in abutment with a housing, the first core component including a central bore receiving a shaft and a shaft spring, wherein the shaft spring is positioned within an interior of the shaft;
a second core component extending around the first core component, wherein the second core component and the first core component are axially moveable relative to one another;
a third core component extending within the second core component, wherein the third core component and the second core component are axially moveable relative to one another, and wherein the third core component is positioned directly adjacent an interior surface of the second core component; and
a positioning sphere extending through an opening of the first core component, wherein the positioning sphere abuts the second core component when in a first position, and wherein the positioning sphere abuts a detent of the shaft when in a second position.

10. The bi-stable mechanical latching actuator of claim 9 , wherein the positioning sphere is disposed within a cavity between the first core component and the second core component in the first position.

11. The bi-stable mechanical latching actuator of claim 9 , the second core component comprising:
a first region having a first radial thickness between an interior surface and an exterior surface;
a second region having a second radial thickness between the interior surface and the exterior surface, wherein the second radial thickness is greater than the first radial thickness; and
a shoulder region between the first and second regions, wherein the positioning sphere is in physical contact with the shoulder region when the bi-stable actuator is in the first position.

12. The bi-stable mechanical latching actuator of claim 9 , further comprising a core spring in contact with the second core component and the third core component.

13. The bi-stable mechanical latching actuator of claim 12 , the second core component comprising a first end and a second end, wherein the first end is operable to engage a flange of the first core component, and wherein the second end is engaged with the core spring.

14. The bi-stable mechanical latching actuator of claim 9 , wherein the first core component is concentrically disposed about a central longitudinal axis, and wherein the second core component is a cylinder concentrically disposed about the first core component.

15. The bi-stable mechanical latching actuator of claim 9 , further comprising one or more additional positioning spheres located along a circumference of the first core component.

16. A method, comprising:
providing a bi-stable actuator, the bi-stable actuator comprising:
a first core component in abutment with a housing, the first core component including a central bore including a shaft and a shaft spring, wherein the shaft spring is positioned within an interior of the shaft;
a second core component extending around the first core component, wherein the second core component and the first core component are axially moveable relative to one another;
a third core component extending within the second core component, wherein the third core component and the second core component are axially moveable relative to one another; and
a positioning sphere positioned within an opening of the first core component;

biasing the third core component within the second core component from a first radial position to a second radial position, wherein the positioning sphere abuts the second core component when the third core component is in the first radial position, and wherein the positioning sphere abuts a detent of the shaft when the third core component is in the second radial position; and
biasing, in response to an external force acting on the third core component, the second core component and the third core component towards the first core component, wherein a first end of the second core component abuts a flange of the first core component, and wherein the positioning sphere is in abutment with the second core component and the detent of the shaft.

17. The method according to claim 16 , further comprising biasing, in response to a spring force from a core spring positioned between the third core component and the second core component, the third core component away from the first core component, wherein the first end of the second core component remains in abutment with the flange of the first core component, and wherein the positioning sphere remains in abutment with the second core component and the detent of the shaft.

18. The method according to claim 17 , further comprising biasing, in response to a second external force acting on the s

Assignees

• Littelfuse Inc

Inventors

• Mantoan Davide

Classifications

• H01F7/124 Primary

  by mechanical latch, e.g. detent · CPC title

• E05B63/121

  using balls or the like cooperating with notches · CPC title

• H01F7/088

  provided with means for absorbing shocks · CPC title

• E05C19/04

  Ball or roller catches · CPC title

• H01F2007/1669

  Armatures actuated by current pulse, e.g. bistable actuators · CPC title