Stationary contact assembly and corresponding switch contact

Patent metadata

Field	Value
Publication number	US-11081296-B2
Application number	US-201916387796-A
Country	US
Kind code	B2
Filing date	Apr 18, 2019
Priority date	Apr 19, 2018
Publication date	Aug 3, 2021
Grant date	Aug 3, 2021

Abstract

Embodiments of the present disclosure provide a stationary contact assembly and a corresponding switch contact. The stationary contact assembly comprises: a stationary contact body (21); a stationary contact point (23) placed on the stationary contact body (21); and an arc-guiding member (25) fixed on the stationary contact body (21) and including an arc guiding portion (251), the arc guiding portion (251) comprising a first end (A) and a second end (B) that are opposite to each other, the first end (A) being close to the stationary contact point (23), a direction form the first end (A) to the second end (B) defining a main movement direction (F) of arc. The arc guiding portion (251) of the arc-guiding member (25) comprises an arc-guiding section (2511) at the first end (A), the arc-guiding section is adapted to guide the arc away from the stationary contact point (23) into the arc guiding portion (251), and the stationary contact point (23) is close to or in contact with the arc-guiding section (2511) in the main movement direction (F) of the arc. The stationary contact assembly of the embodiments of the present disclosure has an improved arc-guiding member that can guide the arc to quickly leave the contact point, enhance the mechanical strength of the stationary contact and reduce the production cost of the contact.

First claim

We claim:

1. A stationary contact assembly comprising:
a stationary contact body;
a stationary contact point placed on the stationary contact body; and
an arc-guiding member fixed on the stationary contact body and comprising an arc guiding portion, the arc guiding portion comprising a first end and a second end opposite to each other, the first end being close to the stationary contact point, a direction from the first end to the second end defining a main movement direction of an arc,
the arc guiding portion of the arc-guiding member comprising an arc-guiding section at the first end, the arc-guiding section being adapted to guide the arc away from the stationary contact point into the arc guiding portion, and
the stationary contact point being close to or in contact with the arc-guiding section in the main movement direction of the arc,
wherein the arc-guiding member further comprises a mounting portion adapted to fix the arc-guiding member onto the stationary contact body,
wherein the mounting portion is connected to the arc guiding portion, an opening is formed at a connection of the mounting portion and the arc guiding portion, and the opening is adapted to allow the stationary contact body to pass therethrough so that the stationary contact point is close to the arc-guiding section at the opening, and
wherein the mounting portion is formed with a support platform on a side adjacent to the opening, and the support platform supports the stationary contact body at the opening.

2. The stationary contact assembly of claim 1 , wherein the arc-guiding member is fixed onto the stationary contact body by welding.

3. The stationary contact assembly of claim 1 , wherein the arc-guiding member is formed with holding sheets at the first end of the arc guiding poriton, and the arc-guiding member is snap-fitted and fixed onto the stationary contact body by bending the holding sheets.

4. The stationary contact assembly of claim 1 , wherein the mounting portion is made of a magnetically conductive material at least at a section forming the support platform.

5. The stationary contact assembly of claim 1 , wherein a side of the stationary contact body passing through the opening is located below the arc-guiding section so as to be clamped between the arc-guiding section and the support platform.

6. The stationary contact assembly of claim 1 , wherein the mounting portion is formed with a mounting hole for fixing the arc-guiding member onto the stationary contact body via a screw.

7. The stationary contact assembly of claim 6 , wherein the mounting hole of the mounting portion is a circular hole or U-shaped hole.

8. The stationary contact assembly of claim 1 , wherein the arc-guiding section is a protrusion extending from the arc guiding portion, and the protrusion extends in a direction opposite to the main movement direction of the arc.

9. The stationary contact assembly of claim 8 , wherein the protrusion is tongue-shaped.

10. The stationary contact assembly of claim 1 , wherein a region of the arc guiding portion following the arc-guiding section along the main movement direction of the arc is of a larger thickness than other regions of the arc guiding portion.

11. The stationary contact assembly of claim 1 , wherein the arc guiding portion itself is integrally formed.

12. The stationary contact assembly of claim 1 , wherein the arc-guiding member itself is integrally formed.

13. The stationary contact assembly of claim 1 , wherein the arc-guiding member is formed in a zigzag shape.

14. The stationary contact assembly of claim 1 , wherein the stationary contact body is of a U shape with a long side and a short side, the stationary contact point is placed on the short side of the U shape, and the short side of the stationary contact body passes through the opening of the arc-guiding member.

15. A switch contact comprising a stationary contact, a movable contact, and an arc extinguishing element, the stationary contact comprising the stationary contact assembly according to claim 1 .

Assignees

• Schneider Electric Ind Sas

Inventors

• Tian Haifeng
• Larcher Patrick

Classifications

• H01H9/446

  using magnetisable elements associated with the contacts · CPC title

• H01H9/34 Primary

  Stationary parts for restricting or subdividing the arc, e.g. barrier plate · CPC title

• H01H9/46 Primary

  using arcing horns (using blow-out magnet H01H9/44) · CPC title