Drive device for a hand-held device for locally puncturing a skin, and hand-held device

Abstract

The invention relates to a drive device for a hand-held device (1) for locally puncturing a skin, having a housing (5) which is connectable to a module housing (8) of a skin-puncturing device; and an electrical drive device which is arranged in the housing (5) and has a tapping component which is designed to provide a tap for tapping a rotary drive movement generated by the electric drive device for the skin-puncturing device. The electric drive device has an electric motor designed as an external rotor with a rotating rotor component, in which the tapping component is arranged on the rotor component and eccentrically in relation to a rotor axis. Furthermore, a hand-held device (1) for locally puncturing a skin is provided.

Claims

1. A drive device for a hand-held device for locally puncturing a skin, comprising: a housing which is connectable to a module housing of a skin-puncturing device; and an electrical drive device which is arranged in the housing and has a tapping component configured to provide a tap for tapping a rotary drive movement generated by the electric drive device for the skin-puncturing device; wherein the electric drive device has an electric motor designed as an external rotor with a rotating rotor component, wherein the tapping component is eccentrically arranged on the rotor component in relation to a rotor axis.

2. The drive device according to claim 1, wherein the tapping component is arranged on an end face of the rotor component.

3. The drive device according to claim 1, wherein the tapping component is movably arranged on the rotor component such that an eccentricity of the tap in relation to the rotor axis is adjustable.

4. The drive device according to claim 1, wherein the tapping component is integrally formed on the rotor component.

5. The drive device according to claim 1, wherein the tapping component is detachably arranged on the rotor component.

6. The drive device according to claim 1, wherein a balance mass is assigned to the tapping component.

7. The drive device according to claim 6, wherein the balance mass is formed with a balance component which is mounted on the rotor component.

8. The drive device according to claim 7, wherein the balance component is arranged on the tapping component.

9. The drive device according to claim 1, further comprising a bearing component arranged on the tapping component, the bearing component being designed to couple to a connecting rod component for tapping the rotary drive movement.

10. The drive device according to claim 1, wherein the tapping component is arranged on a rotor housing component.

11. The drive device according to claim 1, wherein a handpiece is formed with the housing.

12. A hand-held device for locally puncturing a skin, comprising: a drive device according to claim 1; a skin-puncturing device having a module housing which is detachably connected to the drive device and in which, during operation, a puncturing device is connected for forward and backward movement in a module housing opening on the front; and a coupling device which is formed with the drive device and/or the skin-puncturing device and is designed to tap a rotary drive movement provided in the drive device at the tap of an electric motor designed as an external rotor and convert it into a linear movement and couple said linear movement to the puncturing device.

13. The hand-held device according to claim 12, wherein the skin-puncturing device is formed with a needle module designed as a disposable module.

14. The hand-held device according to claim 12, wherein the coupling device has a connecting rod component which is connected in a rotationally decoupling manner to a tapping component of the electric motor providing the tap.

15. The hand-held device according to claim 12, further comprising a handpiece which is grippable by a user and which is formed with a housing of the drive device.

Description

DESCRIPTION OF EMBODIMENTS

[0026] Further embodiments are explained below with reference to figures in the drawings, in which:

[0027] FIG. 1 shows a schematic perspective depiction of a hand-held device for locally puncturing a skin, having a drive device and a skin-puncturing device connected thereto, which are formed with a drive module and a needle module;

[0028] FIG. 2 shows a schematic perspective depiction of the hand-held device from FIG. 1, wherein the skin-puncturing device formed with the needle module is separated from the drive device;

[0029] FIG. 3 shows, diagonally from the front, a perspective depiction of an electric motor designed as an external rotor;

[0030] FIG. 4 shows, diagonally from the rear, a schematic perspective depiction of the electric motor from FIG. 3;

[0031] FIG. 5 shows, diagonally from the rear and partially in section, a schematic perspective depiction of the electric motor from FIG. 4, wherein a connecting rod component is coupled to an eccentric tap;

[0032] FIG. 6 shows, diagonally from the rear, a schematic perspective depiction of the electric motor from FIG. 5 in a different rotational position;

[0033] FIG. 7 shows a schematic perspective depiction of an end portion of the connecting rod component in detail;

[0034] FIG. 8 shows a schematic perspective depiction of the end portion of the connecting rod component from FIG. 7 in detail and in section;

[0035] FIG. 9 shows a schematic perspective depiction of a balance component with one-piece and multi-piece design.

[0036] FIGS. 1 and 2 show schematic perspective depictions of a hand-held device 1 having a drive module 2 providing a drive device and a needle module 3 coupled thereto and providing a skin-puncturing device, which can be detached from the hand-held module 2 according to FIG. 2, in particular after the hand-held device 1 has been used for locally puncturing a skin in order to dispose of the needle module 3 which can be designed as a disposable module.

[0037] The hand-held device 1 is designed to puncture human or animal skin several times locally during operation with a repetition frequency. For this purpose, a puncturing device having one or more puncturing needles (not shown) is moved forward and backward through a housing opening 4 on the front on the needle module 3, as it is known per se. In order to provide the linear forward and backward movement of the puncturing device, a coupling device (not shown) is provided, which, in the example shown, is arranged in a housing 5 of the drive module 2 and designed to tap a rotary drive movement provided by an electric motor of the drive device and convert it into a linear movement for moving the puncturing device forward and backward and to couple it directly or indirectly to the one or more puncturing needles. A conversion mechanism is thus provided with the coupling device, as is known per se for such hand-held devices. The puncturing device is then moved forward and backward at a repetition frequency.

[0038] The linear drive movement is transmitted to the puncturing device via a coupling component 6 (cf. FIG. 2) of the skin-puncturing device formed with the needle module 3, which is connected to the one or more puncturing needles of the puncturing device, so that the one or more puncturing needles can be moved forward and backward. The coupling component 6 can be part of the coupling device or formed separately therefrom in order to tap the linear movement and transfer it to the puncturing device.

[0039] The hand-held device 1 can be designed as a tattooing device or as a device for creating permanent makeup. In this case, a dye to be introduced into the skin can be supplied via an opening 7 on a module housing 8. However, the hand-held device 1 can also be used for locally puncturing the skin without introducing any substance.

[0040] A handpiece 9 is formed with the housing 5 of the drive device provided by means of the drive module 2 and can be gripped by the user in order to guide the hand-held device 1 during operation.

[0041] In the following and with reference to FIGS. 3 to 9, embodiments of an electric motor 20 designed as an external rotor (outrunner) are described, which is accommodated in the housing 5 of the drive device provided by means of the drive module 2 in order to provide the rotary drive movement. In the case of the external rotor, an external rotor component 21 rotates during operation. In the embodiment shown, the rotor component 21 forms a rotating outer bell or a rotating outer housing of the electric motor 20, which can be cup-shaped. The electric motor 20 can be mounted using a docking flange 22. Electrical connections/taps are arranged in a block 23.

[0042] The rotor component 21 rotates about a motor or rotor axis formed in the axial direction of a motor shaft 24. A protruding part 25 of the motor shaft 24 can be omitted.

[0043] For the operation of the hand-held device 1, it is provided that an eccentric rotary movement is provided by means of the electric motor 20, which forms a drive movement for moving the puncturing device forward and backward. For this purpose, according to FIG. 4, a tapping component 27 eccentrically arranged in relation to the motor shaft 24 is provided on a (rear) end face 26 of the rotor component 21 and formed with an eccentric crank pin 28 in the embodiment. The tapping component 27 can be, for example, welded or glued to the rotor component 21. A detachable mounting on the rotor component 21 can be provided in particular such that the tapping component 27 can be fixed in several positions at different distances from the motor shaft 24 in order to adjust the eccentricity.

[0044] In order to eccentrically tap the rotary drive movement, the tapping component 27 is coupled to a connecting rod component 29 (cf. FIGS. 5 and 6). The end of the connecting rod component 29 is formed with a connecting rod eye 30 which, in the example shown, essentially completely encompasses a shaft shoulder 30 on the crank pin 28. The connecting rod component 29 is connected to the tapping component 27 in a rotationally decoupled manner. For this purpose, a ball bearing 32 is provided in a surrounding outer ring 33, which is arranged on the eccentrically arranged crank pin 28 above the connecting rod component 29.

[0045] In particular according to FIGS. 4 to 6, a balance component 34 is also provided on the tapping component 27, which provides a balance mass assigned to the tapping component 27 for balance. For the balance component 34, FIGS. 7 to 9 show the one-piece design and an alternative multi-piece design. In the case of the multi-part design, a standard component 35 can be glued or welded to the outer side of the rotor component 21.

[0046] It can be provided that the balance component is movably arranged on the rotor component 21 such that a distance between a rotor axis of the electric motor 20 and the tapping component is changeable in the radial direction, so that the eccentricity of the tapping component is adjustable. By interacting with the connecting rod component, a stroke for the forward and backward movement of the puncturing device can thus be adjusted.

[0047] The features disclosed in the above description, the claims, and the drawings can be of relevance, both individually and also in any combination, for realizing the different embodiments.