Plug-in coupling for a battery unit

Patent metadata

Field	Value
Publication number	US-11005206-B2
Application number	US-201816636252-A
Country	US
Kind code	B2
Filing date	Aug 3, 2018
Priority date	Aug 9, 2017
Publication date	May 11, 2021
Grant date	May 11, 2021

Abstract

A plug-in coupling (100) for making electrical contact with an electric drive (90) which is included in a hand-held power tool (200) and has a battery unit (20) which is to be accommodated by the hand-held power tool (200). The plug-in coupling (100) has at least one electrical contact plate (1) which is to be connected to the hand-held power tool (200), and at least one electrical contact spring pair (3) which corresponds to the contact plate (1), wherein the contact spring pair (3) is to be arranged on the battery unit (20) and is to be slid onto the contact plate (1) in the sliding-on direction (AR) and is to be withdrawn therefrom in the withdrawal direction (AB), wherein in the state in which contact is made (ZK) the contact plate (1) and the contact spring pair (3) form a frictionally locking latching-connection pairing.

First claim

What is claimed is:

1. A plug-in coupling for making electrical contact with an electric drive included in a hand-held power tool and a battery unit to be accommodated by the hand-held power tool, the plug-in coupling comprising:
at least one electrical contact plate connectable to the hand-held power tool; and
at least one electrical contact spring pair corresponding to the contact plate, the contact spring pair arrangable on the battery unit and slidable onto the contact plate in a sliding-on direction and withdrawable from the contact plate in a withdrawal direction;
in a contact state, the contact plate and the contact spring pair forming a frictionally locking latch-connection pairing;
the contact spring pair having free ends facing the contact plate in the sliding-on direction.

2. The plug-in coupling as recited in claim 1 wherein the contact plate has a groove running transversely with respect to the sliding-on direction, a latching projection formed on the contact spring pair being latchable into the groove.

3. The plug-in coupling as recited in claim 2 wherein the groove is an elongated hole.

4. The plug-in coupling as recited in claim 3 wherein at least one chamfer is formed on the elongated hole in the sliding-on direction or in the withdrawal direction.

5. The plug-in coupling as recited in claim 2 wherein the groove is part of a surface contour of the contact plate, wherein the surface contour is complementary to the contact spring pair.

6. The plug-in coupling as recited in claim 1 wherein the contact plate has a coupling aid on an end face.

7. The plug-in coupling as recited in claim 6 wherein the coupling aids tapers.

8. The plug-in coupling as recited in claim 1 wherein the contact spring pair has two elastic double tongues located opposite one another.

9. The plug-in coupling as recited in claim 8 wherein each of the double tongues is supported via two additional spring elements counteracting spreading apart of the two elastic double tongues.

10. The plug-in coupling as recited in claim 1 wherein the plug-in coupling has two contact plates of the at least one contact plate spaced apart from one another or two contact spring pairs of the at least one spring pair spaced apart from one another.

11. A hand-held power tool comprising the plug-in coupling as recited in claim 1 , wherein the electrical contact plate of the plug-in coupling is connected to the hand-held power tool, and the contact spring pair is arranged on the battery unit assigned to the hand-held power tool.

12. The plug-in coupling as recited in claim 1 wherein the contact spring pair diverge away from each other toward the free ends.

13. The plug-in coupling as recited in claim 12 wherein the contact spring pair diverge away from each other toward the free ends with at least a joining angle FW from a central axis at a closest converging point of the contact spring pair, the contact spring pair also diverging away opposite the joining angle FW from the closest point at a holding angle HW, the joining angle FW being larger than the holding angle HW.

14. The plug-in coupling as recited in claim 1 wherein in the contact state the contact spring pair contact the contact plate in only one connection along the sliding-in direction.

15. The plug-in coupling as recited in claim 1 wherein in the contact state the contact spring pair contact the groove in only one connection along the sliding-in direction.

Assignees

• Hilti Ag

Inventors

• Meixner Ralf
• Stempfhuber Johannes
• Holubarsch Markus

Classifications

• H01R13/04

  Pins or blades for co-operation with sockets · CPC title

• H01R13/20

  Pins, blades, or sockets shaped, or provided with separate member, to retain co-operating parts together · CPC title

• H01R13/18 Primary

  with the spring member surrounding the socket · CPC title

• B25F5/02

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

• H01R13/05

  Resilient pins or blades (carrying separate resilient parts H01R13/15) · CPC title