A pen comprising a shaft, a gripping zone, and a measuring device having a sensor configured to measure a force acting on the gripping zone. The pen further comprises a cover in the area of the gripping zone, the cover configured to cover the measuring device.
1. A pen, comprising:
a gear unit comprising a shaft, the shaft including a ramp,
a gripping zone located on the shaft and having a gripping zone area,
a measuring device located on the ramp, the measuring device including a sensor configured to measure a force acting on the gripping zone, and
a cover in the gripping zone area, the cover configured to cover at least a portion of the measuring device,
wherein the gear unit is configured to transfer a first movement originating from the force acting on the gripping zone to the sensor and to translate the first movement to a second movement directed transversely to the first movement and captured by the sensor via the ramp, and
wherein an angle of attack (ϕ) of the ramp determines a gear ratio.
2. The pen according to claim 1 , wherein the cover has a shape of a sleeve at least partially surrounding the shaft.
3. The pen according to claim 1 , wherein the gear unit has a limitation device to limit the force transferred to the sensor.
4. The pen according to claim 3 , wherein the limitation device has a resilient tongue.
5. The pen according to claim 1 , wherein the sensor, in response to the force transferred to it by the gear unit, is configured to move away against an elastic restoring force.
6. The pen according to claim 1 , wherein the ramp and the measuring device are at least partially inside of the shaft.
7. The pen according to claim 6 , wherein the shaft comprises an outer contour configured to, in response to a force acting on the gripping zone, adjust against an elastic restoring force, wherein the sensor responds to the adjustment.
8. The pen according to claim 7 , wherein the shaft is deformed by the force acting on the gripping zone.
9. The pen according to claim 1 , wherein the gripping zone, when viewed in a circumferential direction of the pen, is in a different angle range than the sensor or the gear unit.
10. The pen according to claim 9 , wherein the gripping zone, when viewed in a circumferential direction of the pen, is in a different angle range than the sensor and the gear unit.
11. The pen according to claim 1 , wherein the shaft is deformed by the force acting on the gripping zone.
12. The pen according to claim 1 , wherein the sensor comprises a measuring pin configured to be depressed by the gear unit in response to the force acting on the gripping zone.
13. The pen according to claim 12 , wherein the force acting on the gripping zone deforms the cover, and wherein the deformation of the cover causes the gear unit to depress the measuring pin.
14. The pen according to claim 1 , further comprising an evaluation electronic and a flex element connecting the sensor to the evaluation electronic, wherein the evaluation electronic is configured to evaluate signals emitted by the sensor in response to the force acting on the gripping zone.
15. The pen according to claim 14 , wherein the sensor is positioned on at least a portion of the flex element.
16. The pen according to claim 1 , herein the shaft comprises an elongated tube.
17. The pen according to claim 16 , wherein the shaft is comprised of two half shells affixed together.
18. The pen according to claim 17 , wherein each of the two half shells has a tongue that projects into the elongated tube, and wherein the ramp is located on one of the tongues.
19. The pen according to claim 1 , wherein the shaft is recessed in the gripping zone area.
20. The pen according to claim 1 , wherein the shaft and the cover are comprised of an elastically deformable material.