Sensor having a pressing resilience

Patent metadata

Field	Value
Publication number	US-11486771-B2
Application number	US-201816651902-A
Country	US
Kind code	B2
Filing date	Sep 18, 2018
Priority date	Sep 28, 2017
Publication date	Nov 1, 2022
Grant date	Nov 1, 2022

Abstract

A sensor for measuring a parameter at a measurement point of a surface by means of direct contact. The sensor includes a sensor element arranged movably in the sensor and a spring element that can resiliently absorb an application force with which sensor element is pressed against the measurement point.

First claim

The invention claimed is:

1. A sensor for measuring a parameter at a measurement point of a surface by means of direct contact, comprising
a sensor element arranged movably in the sensor,
a spring element which can resiliently absorb an application force with which the sensor element is pressed against the measurement point,
a base plate having connection pins,
a cover cap seated on the base plate,
a carriage on which the sensor element and the spring element are fastened,
the base plate and the cover cap forming a housing which receives and encloses the carriage together with the spring element,
bonding wires which electrically connect the sensor element to the connection pins,
wherein the carriage is fastened by means of the spring element in the sensor with a pre-stress in such a way that the carriage and therefore the sensor element can move against the pre-stress in the direction of the base plate,
wherein the spring element is configured as a leaf spring with two ends, both of which protrude laterally from the carriage,
wherein the two ends of the leaf spring bear on a stop in the housing, and
wherein the carriage and the sensor element fastened thereon pressed in the direction of the base plate against the stop.

2. The sensor according to claim 1 ,
wherein the cover cap comprises a guide, in which the carriage is guided in such a way that it can move in the direction of the base plate and back.

3. The sensor according to claim 1 ,
wherein the carriage comprises a sleeve, which has a closed end and in which the sensor element is arranged and fastened,
wherein the cover cap comprises an opening through which the closed end, facing away from the base plate, of the sleeve is fed.

4. The sensor according to claim 3 ,
wherein the sensor element is an NTC-based temperature sensor,
wherein the sensor element is fitted into the sleeve and is encapsulated there with an encapsulation compound.

5. The sensor according to claim 3 ,
wherein the sleeve is formed from metal,
wherein the base plate, carriage, cover cap and optionally spacer ring are formed as an injection-molded part from a filled or unfilled plastic.

6. The sensor according to claim 1 ,
wherein the cover cap comprises latch elements, with which it is latched in corresponding recesses of the base plate.

7. The sensor according to claim 6 ,
wherein the base plate is configured as a flat plate,
wherein a spacer ring, which forms a segment of the housing, is inserted between the cover cap and the base plate, the latch elements engaging through the spacer ring so that the latter is held between the cover cap and the base plate, a stop for the ends of the leaf spring being formed on the spacer ring.

8. The sensor according to claim 1 ,
wherein the connection pins are pressed into the base plate and pass through the latter, so that they comprise a section pointing inward and a section pointing outward, the latter being provided in order to connect the sensor to a circuit environment.

9. The sensor according to claim 1 ,
wherein the bonding wires of the sensor element are laterally curved outward.

10. A sensor for measuring a parameter at a measurement point of a surface by means of direct contact, comprising
a sensor element arranged movably in the sensor,
a spring element which can resiliently absorb an application force with which the sensor element is pressed against the measurement point,
a base plate having connection pins,
a cover cap seated on the base plate,
a carriage on which the sensor element and the spring element are fastened,
the base plate and the cover cap forming a housing which receives and encloses the carriage together with the spring element, and
bonding wires which electrically connect the sensor element to the connection pins,
wherein the carriage is fastened by means of the spring element in the sensor with a pre-stress in such a way that the carriage and therefore the sensor element can move against the pre-stress in the direction of the base plate, and
wherein the cover cap comprises latch elements, with which it is latched in corresponding recesses of the base plate.

11. A sensor for measuring a parameter at a measurement point of a surface by means of direct contact, comprising
a sensor element arranged movably in the sensor,
a spring element which can resiliently absorb an application force with which the sensor element is pressed against the measurement point,
a base plate having connection pins,
a cover cap seated on the base plate,
a carriage on which the sensor element and the spring element are fastened,
the base plate and the cover cap forming a housing which receives and encloses the carriage together with the spring element, and
bonding wires which electrically connect the sensor element to the connection pins,
wherein the carriage is fastened by means of the spring element in the sensor with a pre-stress in such a way that the carriage and therefore the sensor element can move against the pre-stress in the direction of the base plate, and
wherein the connection pins are pressed into the base plate and pass through the latter, so that they comprise a section pointing inward and a section pointing outward, the latter being provided in order to connect the sensor to a circuit environment.

Assignees

• Tdk Electronics Ag

Inventors

• Rogge Clemens
• Dehoff Carsten

Classifications

• G01K1/14 Primary

  Supports; Fastening devices; Arrangements for mounting thermometers in particular locations · CPC title

• G01K7/22 Primary

  the element being a non-linear resistance, e.g. thermistor (G01K7/26 takes precedence) · CPC title