Handheld power tool and amplifier antenna

Patent metadata

Field	Value
Publication number	US-10691994-B2
Application number	US-201716077144-A
Country	US
Kind code	B2
Filing date	Mar 7, 2017
Priority date	Mar 10, 2016
Publication date	Jun 23, 2020
Grant date	Jun 23, 2020

Abstract

An electric handheld power tool, including a data memory and a data interface signal-connected to the data memory, via which tool-related data may be read out from the data memory with the aid of a terminal, the data interface including a system antenna for wireless radio data transmission, and the electric handheld power tool including an amplifier antenna which is different from the system antenna, the amplifier antenna being magnetically coupled with the system antenna and preferably mounted on or in the direct vicinity of the system antenna.

First claim

What is claimed is:

1. An electric handheld power tool comprising:
a data memory and a data interface signal-connected to the data memory, tool-related data readable out from the data memory via the data interface with the aid of a terminal, and, for the purpose of wireless radio data transmission, the data interface including a system antenna; and
an amplifier antenna different from the system antenna, the amplifier antenna being magnetically coupled with the system antenna.

2. The electric handheld power tool as recited in claim 1 wherein the amplifier antenna is mounted on or in a direct vicinity of the system antenna.

3. The electric handheld power tool as recited in claim 1 wherein the amplifier antenna includes a dipole and an inductive coupling loop.

4. The electric handheld power tool as recited in claim 3 wherein the dipole and the coupling loop are designed as a wire, forming a single piece with each other.

5. The electric handheld power tool as recited in claim 1 wherein the system antenna is designed as a PCB antenna.

6. The electric handheld power tool as recited in claim 3 wherein the dipole is designed as a symmetrical λ/2 dipole or an asymmetrical λ/4 dipole having a terminating element, with respect to a tuning frequency of the data interface.

7. The electric handheld power tool as recited claim 1 wherein the data interface is tuned to an RFID UHF range.

8. The electric handheld power tool as recited in claim 1 wherein the amplifier antenna is encompassed by a self-adhesive label.

9. The electric handheld power tool as recited in claim 8 wherein the amplifier antenna is provided on the label as a metallization layer.

10. The electric handheld power tool as recited in claim 1 wherein the data memory is part of control electronics of the handheld power tool.

11. The electric handheld power tool as recited in claim 1 further comprising a power tool battery for supplying electric power to the handheld power tool, the data interface being supplied with power by the power tool battery or the system antenna.

12. The electric handheld power tool as recited in claim 1 wherein the amplifier antenna is magnetically coupled to the system antenna via an H field.

13. The electric handheld power tool as recited in claim 1 wherein system antenna defines a magnetic near field, and the amplifier antenna defines an electromagnetic far field larger than the magnetic near field.

14. The electric handheld power tool as recited in claim 1 wherein system antenna and the amplifier antenna each transmit the tool-related data.

15. A self-adhesive label for gluing onto a housing of an electric handheld power tool, the label comprising an amplifier antenna having a dipole and an inductive coupling loop.

16. The label as recited in claim 15 wherein the dipole and the coupling loop are designed as a wire, forming a single piece with each other.

17. A method for operating an electric handheld power tool comprising: using a dipole, including an inductive coupling loop formed thereon as a single piece, as an amplifier antenna for a wireless data interface of an electric handheld power tool.

Assignees

• Hilti Ag

Inventors

• Cecchin Holger
• Forstner Markus
• Fuchs Michael
• Matanovic Josip

Classifications

• B25F5/00 Primary

  Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for · CPC title

• G06K19/07756

  the connection being non-galvanic, e.g. capacitive · CPC title

• G06K19/07767

  the first and second communication means being two different antennas types, e.g. dipole and coil type, or two antennas of the same kind but operating at different frequencies · CPC title

• H01Q9/285

  Planar dipole (H01Q9/065 takes precedence; patch antenna H01Q9/0407) · CPC title

• G06K19/0724

  the arrangement being a circuit for communicating at a plurality of frequencies, e.g. for managing time multiplexed communication over at least two antennas of different types · CPC title