Spring contact on a rechargeable battery

Patent metadata

Field	Value
Publication number	US-11699870-B2
Application number	US-202217680083-A
Country	US
Kind code	B2
Filing date	Feb 24, 2022
Priority date	Apr 21, 2017
Publication date	Jul 11, 2023
Grant date	Jul 11, 2023

Abstract

A power tool, which includes a receiving device having at least one receiving element and a power supply unit connectable to the power tool, for example a rechargeable battery, which includes a connecting device, the connecting device having at least one contact element, the receiving device being designed to receive and hold the connecting device, so that the at least one receiving element and the at least one contact element are connectable to each other for establishing an electrical connection. A damping element is provided on at least one contact element, whereby the at least one contact element is movable in a first direction and a second direction as well as relative to the particular receiving element, so that it is possible to counteract a relative movement between the contact element and the particular receiving element when the contact element and the receiving element are connected to each other.

First claim

What is claimed is:

1. A power tool comprising: a receiving device having at least one receiving element; a power supply unit connectable to the power tool and including a connecting device, the connecting device having at least one contact element, the receiving device being designed to receive and hold the connecting device, so that the at least one receiving element and the at least one contact element are connectable to each other to establish an electrical connection; and a damping element on the at least one contact element or the at least one receiving element to counteract a relative movement between the contact element and the respective receiving element when the contact element and the receiving element are connected to each other.

2. The power tool as recited in claim 1 wherein the damping element is designed as a spring and is positioned behind the contact element in a first direction, so that a spring force applied by the spring presses the contact element in a second direction.

3. The power tool as recited in claim 1 wherein the damping element is designed as a component including an elastically deformable material.

4. A power drill comprising the power tool as recited in claim 1 .

5. The power tool as recited in claim 1 wherein the power supply unit is a rechargeable battery.

6. The power tool as recited in claim 1 wherein the at least one contact element includes a first contact plug and a first litz wire attached to the first contact plug.

7. The power tool as recited in claim 6 wherein the first contact plug has a first open end for receiving the receiving element and a second closed end, the first litz wire attached to the second closed end.

8. The power tool as recited in claim 6 wherein the first litz wire is flexible to permit a movement of the first contact plug.

9. The power tool as recited in claim 6 wherein the first contact plug is located in a first contact chamber having a first opening, the first contact plug having a first open end facing the first opening.

10. The power tool as recited in claim 1 wherein the at least one contact element includes exactly two contact elements and the at least one receiving element includes exactly two receiving elements.

11. The power tool as recited in claim 1 wherein the at least one contact element includes a first end and a second end and two opposing contact blades between the first and second end.

12. The power tool as recited in claim 11 wherein at least one of the two opposing contact blades is flexible so as to be pivotable about the second end.

13. The power tool as recited in claim 12 wherein both of the two opposing contact blades are flexible so as to be pivotable about the second end.

14. The power tool as recited in claim 11 wherein the two opposing contact blades slope to converge towards each other from the second end to a minimum spacing distance.

15. The power tool as recited in claim 14 wherein the two opposing contact blades diverge away from each other from the minimum spacing distance to the first end.

16. The power tool as recited in claim 14 wherein at least one of the two opposing contact blades is flexible so as to be pivotable about the second end.

17. The power tool as recited in claim 16 wherein both of the two opposing contact blades are flexible so as to be pivotable about the second end.

18. The power tool as recited in claim 1 wherein the at least one receiving element is a contact plate.

19. The power tool as recited in claim 1 wherein the at least one contact element is situated in a contact chamber.

20. The power tool as recited in claim 19 wherein the at least one contact element includes a first end and a second end and two opposing contact blades between the first and second end, the two opposing contact blades being pivotable within the contact chamber.

Assignees

• Hilti Ag

Inventors

• Meixner Ralf
• Stempfhuber Johannes

Classifications

• H01R2103/00

  Two poles · CPC title

• B25F5/02

  Construction of casings, bodies or handles {(B25F5/006, B25F5/008 take precedence)} · CPC title

• H01R13/112

  forked sockets having two legs · CPC title

• H01R24/68

  mounted on directly pluggable apparatus · CPC title

• H01R13/15 Primary

  Pins, blades or sockets having separate spring member for producing or increasing contact pressure · CPC title