Injection device with a capacitive proximity sensor
First Claim
1. Injection device for injecting medication to a patient, comprising a surface having a through hole for passage of a needle and a capacitive proximity sensor for detecting proximity or contact of human skin to/with said surface, wherein the capacitive proximity sensor comprises a first electrode, a second electrode defining a capacitance with the first electrode and means for detecting a change in said capacitance due to the proximity of human skin to the sensor, and wherein one side of the first electrode is adjacent to the through hole and has a concave shape that follows part of the contour of the through hole.
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Accused Products
Abstract
An injection device for injecting medication to a patient, comprising a surface (5) having a through hole (3) for passage of a needle, is characterised by further comprising a capacitive proximity sensor (12, 13, 30) for detecting proximity or contact of human skin to/with said surface (5).
34 Citations
21 Claims
- 1. Injection device for injecting medication to a patient, comprising a surface having a through hole for passage of a needle and a capacitive proximity sensor for detecting proximity or contact of human skin to/with said surface, wherein the capacitive proximity sensor comprises a first electrode, a second electrode defining a capacitance with the first electrode and means for detecting a change in said capacitance due to the proximity of human skin to the sensor, and wherein one side of the first electrode is adjacent to the through hole and has a concave shape that follows part of the contour of the through hole.
Specification