CN211954476U - Temperature sensor - Google Patents
Temperature sensor Download PDFInfo
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- CN211954476U CN211954476U CN202020583394.9U CN202020583394U CN211954476U CN 211954476 U CN211954476 U CN 211954476U CN 202020583394 U CN202020583394 U CN 202020583394U CN 211954476 U CN211954476 U CN 211954476U
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- thermistor
- inflection point
- temperature sensor
- leg
- distance
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Abstract
The utility model provides a temperature sensor, it includes terminal, sleeve pipe and thermistor subassembly. The thermistor assembly includes a thermistor and first and second leg portions connecting the thermistor to terminals. The bottom of the sleeve is provided with heat-conducting resin, and the thermistor is completely arranged in the heat-conducting resin. The first leg portion comprises a first connecting portion connected with the thermistor and a first inclined portion extending outwards from the first connecting portion in an inclined mode, and a first inflection point is arranged between the first connecting portion and the first inclined portion. The second leg portion comprises a second connecting portion connected with the thermistor and a second inclined portion extending outwards from the second connecting portion in an inclined mode, and a second inflection point is arranged between the second connecting portion and the second inclined portion. The distance between the first inflection point and the thermistor is not equal to the distance between the second inflection point and the thermistor. The utility model provides a temperature sensor can reduce because of the flexible partial crooked possibility of taking place the short circuit of thermistor subassembly.
Description
Technical Field
The utility model relates to a temperature sensor, especially a temperature sensor for vehicle field.
Background
The temperature sensor in the prior art comprises a thermistor assembly and a sleeve pipe, wherein heat-conducting resin is arranged in the sleeve pipe. The thermistor assembly includes a thermistor, a first leg connected to the thermistor, and a second leg connected to the thermistor. The first leg portion comprises a first connecting portion connected with the thermistor and a first inclined portion extending outwards from the first connecting portion in an inclined mode, and a first inflection point is arranged between the first connecting portion and the first inclined portion. The second leg portion comprises a second connecting portion connected with the thermistor and a second inclined portion extending outwards from the second connecting portion in an inclined mode, and a second inflection point is arranged between the second connecting portion and the second inclined portion. The distance between the first inflection point and the thermistor is equal to the distance between the second inflection point and the thermistor. When the thermistor is inserted into the heat conductive resin, the first leg portion and the second leg portion are easily deformed at the first inflection point and the second inflection point due to resistance. If the deformation is too large, the first leg and the second leg may come into contact with each other, causing a short circuit and thus causing the sensor to fail.
SUMMERY OF THE UTILITY MODEL
It is an object of the present invention to provide a temperature sensor which can reduce the possibility of short circuit occurring due to bending of a flexible portion of a thermistor assembly.
According to an aspect of the present invention, there is provided a temperature sensor, which includes a plug, a terminal fixed to the plug, a connecting member, a sleeve, and a thermistor assembly. A connector connects the sleeve to the plug. The thermistor assembly includes a thermistor and first and second leg portions connecting the thermistor to terminals. The bottom of the sleeve is provided with heat-conducting resin, and the thermistor is arranged in the heat-conducting resin. The first leg portion comprises a first connecting portion connected with the thermistor and a first inclined portion extending outwards from the first connecting portion in an inclined mode, and a first inflection point is arranged between the first connecting portion and the first inclined portion. The second leg portion comprises a second connecting portion connected with the thermistor and a second inclined portion extending outwards from the second connecting portion in an inclined mode, and a second inflection point is arranged between the second connecting portion and the second inclined portion. The distance between the first inflection point and the thermistor is not equal to the distance between the second inflection point and the thermistor.
Preferably, the first connecting portion and the second connecting portion are both arranged in parallel with a central axis of the thermistor.
Preferably, the first leg further includes a first end portion extending upward from the first inclined portion, the second leg further includes a second end portion extending upward from the second inclined portion, and the first end portion and the second end portion are both disposed parallel to a central axis of the thermistor.
Preferably, a third inflection point is arranged between the first end portion and the first inclined portion, a fourth inflection point is arranged between the second end portion and the second inclined portion, and the distance from the third inflection point to the thermistor is not equal to the distance from the fourth inflection point to the thermistor.
Preferably, the cross section of the thermistor is in a runway shape of a playground.
Preferably, the first connecting portion is located at a distance from a central axis of the thermistor equal to a distance from the second connecting portion to the central axis of the thermistor.
Preferably, the first leg portion and the second leg portion are all placed in the heat conducting resin, and the region where the terminal is connected with the first leg portion and the second leg portion is placed in the heat conducting resin.
Preferably, the temperature sensor further comprises an injection molding block partially covering the terminal, and a gap is formed between the injection molding block and the heat-conducting resin.
Preferably, the temperature sensor is an EGR temperature sensor.
According to an aspect of the present invention, there is also provided a temperature sensor, which includes a terminal, a sleeve, and a thermistor assembly. The thermistor assembly includes a thermistor and first and second leg portions connecting the thermistor to terminals. The bottom of the sleeve is provided with heat-conducting resin, and the thermistor is completely arranged in the heat-conducting resin. The first leg portion comprises a first connecting portion connected with the thermistor and a first inclined portion extending outwards from the first connecting portion in an inclined mode, and a first inflection point is arranged between the first connecting portion and the first inclined portion. The second leg portion comprises a second connecting portion connected with the thermistor and a second inclined portion extending outwards from the second connecting portion in an inclined mode, and a second inflection point is arranged between the second connecting portion and the second inclined portion. The distance between the first inflection point and the thermistor is not equal to the distance between the second inflection point and the thermistor.
The utility model provides a temperature sensor is through setting up the first inflection point on the first shank on the thermistor subassembly apart from the thermistor's distance and the second inflection point on the second shank apart from the thermistor's distance inequality to can reduce the possibility of taking place the short circuit because of the flexible part (being leg part) bending of thermistor subassembly.
Drawings
Fig. 1 is a perspective view of the temperature sensor of the present invention.
Fig. 2 is an exploded perspective view of the temperature sensor of the present invention.
Fig. 3 is a cross-sectional view of the temperature sensor of the present invention.
Fig. 4 is a front view of the thermistor assembly.
Detailed Description
Referring to fig. 1 to 3, the present invention provides a temperature sensor 100, which includes a plug 11, a terminal 12 fixed to the plug 11, a connecting member 2, a sleeve 3, and a thermistor assembly 4. The connector 2 connects the sleeve 3 to the plug 11. The thermistor assembly 4 and the terminal 12 are fixed together to achieve electrical connection. The heat conductive resin 5 is disposed inside the sleeve 3. The terminals 12 may be fixed to the plug 11 by injection molding. The front end of the terminal 12 extends into the socket of the plug 11, and the other end of the terminal 12 is located at the other side of the plug 11. Since there are two terminals 12. In order to prevent the terminals 12 on the outside of the plug 11 from separating, an injection-molded part 13 is provided which partially encloses the terminals 12 on the outside of the plug 11. In a preferred embodiment, the terminal 12 is fixed into the plug 11 by injection molding, or the terminal 12 is partially covered by the injection molding 13. In order to obtain a better sealing effect, the connecting piece 2 and the plug 11 are directly provided with a sealing ring 6. The sealing ring 6 may be made of rubber material.
As further shown in fig. 4, the thermistor assembly 4 includes a thermistor 41 and first and second leg portions 42, 43 connecting the thermistor 41 to the terminal 12. The bottom of the sleeve 3 is provided with heat-conducting resin 5, and the thermistor 41 is arranged in the heat-conducting resin 5. The first leg 42 includes a first connection portion 423 connected to the thermistor 41 and a first inclined portion 422 extending obliquely outward from the first connection portion 423, and a first inflection point 424 is provided between the first connection portion 423 and the first inclined portion 422. The second leg portion 43 includes a second connection portion 433 connected to the thermistor 41 and a second inclined portion 432 extending obliquely outward from the second connection portion 433, and a second inflection point 434 is provided between the second connection portion 433 and the second inclined portion 432. The first inflection point 424 is located at a different distance from the thermistor 41 than the second inflection point 434 is located at a different distance from the thermistor 41. Since the first leg portion 42 and the second leg portion 43 are relatively thin, the first leg portion 42 and the second leg portion 43 are easily deformed when receiving an external force. When the thermistor 41 is inserted into the heat conductive resin 5 located inside the sleeve 3, the first inflection point 424 and the second inflection point 434 are easily deformed inward due to the resistance of the heat conductive resin 5. Since the distance from the first inflection point 424 to the thermistor 41 is not equal to the distance from the second inflection point 434 to the thermistor 41, the first leg 42 and the second leg 43 are not easily touched together, and the possibility of short circuit occurring due to bending of the first leg 42 and the second leg 43 can be reduced.
The first leg portion 42 further includes a first end portion 421 extending upward from the first inclined portion 422, and the second leg portion 43 further includes a second end portion 431 extending upward from the second inclined portion 432. The first end 421 and the second end 431 are both disposed parallel to the central axis L of the thermistor 41, and the first connection portion 423 and the second connection portion 433 are both disposed parallel to the central axis L of the thermistor 41.
A third inflection point 425 is provided between the first end 421 and the first inclined portion 422, and a fourth inflection point 435 is provided between the second end 431 and the second inclined portion 432. The distance of the third inflection point 425 from the thermistor 41 is not equal to the distance of the fourth inflection point 435 from the thermistor 41. The thermistor 41 has a cross section in the shape of a racetrack of a playground.
The distance of the first connection portion 423 from the central axis L of the thermistor 41 is equal to the distance of the second connection portion 433 from the central axis L of the thermistor 41.
Preferably, the first leg portion 42 and the second leg portion 43 are all placed in the heat conductive resin 5, and the region where the terminal 12 is connected to the first leg portion 42 and the second leg portion 43 is placed in the heat conductive resin 5. Placing the thermistor 41 in the heat conductive resin 5 can make it possible for the thermistor 41 to sense the ambient temperature well. Placing the first leg portion 42 and the second leg portion 43 in the heat conductive resin 5 can exert an effect of protecting the first leg portion 42 and the second leg portion 43 to some extent.
The temperature sensor also comprises an injection molding block 13 which partially covers the terminal 12, and a gap 8 is arranged between the injection molding block 13 and the heat-conducting resin 5. Water vapor may be present in the gap 8. When the heat conductive resin 5 is subjected to heat treatment (i.e., curing treatment), water vapor in the gap 8 may react with the heat conductive resin 5, so that the heat conductive resin 5 is cured.
The temperature sensor 100 may be an EGR (Exhaust Gas Recirculation) temperature sensor, and may be another type of temperature sensor. The thermistor 41 in the present embodiment is an NTC (Negative Temperature Coefficient) type thermistor, and may be a PTC (Positive Temperature Coefficient) type thermistor.
It will be apparent to those skilled in the art that various modifications and variations can be made to the above-described exemplary embodiments of the present invention without departing from the spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.
Claims (10)
1. A temperature sensor comprising a plug (11), a terminal (12) fixed to the plug (11), a connector (2), a sleeve (3), and a thermistor assembly (4), the connector (2) connecting the sleeve (3) to the plug (11), the thermistor assembly (4) comprising a thermistor (41) and first and second leg portions (42, 43) connecting the thermistor (41) to the terminal (12), the bottom of the sleeve (3) being provided with a heat conductive resin (5), the thermistor (41) being placed in the heat conductive resin (5), characterized in that the first leg portion (42) comprises a first connection portion (423) connected to the thermistor (41) and a first inclined portion (422) extending obliquely outward from the first connection portion (423), a first inflection point (424) being provided between the first connection portion (423) and the first inclined portion (422), the second leg portion (43) comprises a second connecting portion (433) connected with the thermistor (41) and a second inclined portion (432) extending outwards and obliquely from the second connecting portion (433), a second inflection point (434) is arranged between the second connecting portion (433) and the second inclined portion (432), and the distance from the first inflection point (424) to the thermistor (41) is unequal to the distance from the second inflection point (434) to the thermistor (41).
2. The temperature sensor according to claim 1, wherein the first connection portion (423) and the second connection portion (433) are arranged in parallel with a central axis (L) of the thermistor (41).
3. The temperature sensor according to claim 2, wherein the first leg portion (42) further includes a first end portion (421) formed to extend upward from the first inclined portion (422), and the second leg portion (43) further includes a second end portion (431) formed to extend upward from the second inclined portion (432), and the first end portion (421) and the second end portion (431) are both disposed in parallel with a central axis (L) of the thermistor (41).
4. A temperature sensor according to claim 3, wherein a third inflection point (425) is provided between the first end (421) and the first inclined portion (422), a fourth inflection point (435) is provided between the second end (431) and the second inclined portion (432), and the distance from the thermistor (41) to the third inflection point (425) is not equal to the distance from the thermistor (41) to the fourth inflection point (435).
5. A temperature sensor according to any one of claims 1 to 4, characterised in that the thermistor (41) has a cross-section in the shape of a runway of a playground.
6. A temperature sensor according to any one of claims 1 to 4, characterised in that the first connection portion (423) is at a distance from the central axis (L) of the thermistor (41) equal to the distance of the second connection portion (433) from the central axis (L) of the thermistor (41).
7. The temperature sensor according to any one of claims 1 to 4, wherein the first leg portion (42) and the second leg portion (43) are entirely disposed in the heat conductive resin (5), and a region where the terminal (12) is connected to the first leg portion (42) and the second leg portion (43) is disposed in the heat conductive resin (5).
8. The temperature sensor according to any one of claims 1 to 4, further comprising an injection-molded block (13) partially covering the terminal (12), wherein a gap (8) is provided between the injection-molded block (13) and the thermally conductive resin (5).
9. The temperature sensor of any one of claims 1 to 4, wherein the temperature sensor is an EGR temperature sensor.
10. A temperature sensor comprising a terminal (12), a sleeve (3) and a thermistor assembly (4), the thermistor assembly (4) comprising a thermistor (41) and first and second leg portions (42, 43) connecting the thermistor (41) to the terminal (12), the bottom of the sleeve (3) being provided with a heat conductive resin (5), the thermistor (41) being entirely disposed within the heat conductive resin (5), characterized in that the first leg portion (42) comprises a first connecting portion (423) connected to the thermistor (41) and a first inclined portion (422) extending obliquely outward from the first connecting portion (423), a first inflection point (424) being provided between the first connecting portion (423) and the first inclined portion (422), the second leg portion (43) comprising a second connecting portion (433) connected to the thermistor (41) and a second inclined portion (432) extending obliquely outward from the second connecting portion (433), a second inflection point (434) is arranged between the second connecting part (433) and the second inclined part (432), and the distance from the first inflection point (424) to the thermistor (41) is not equal to the distance from the second inflection point (434) to the thermistor (41).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020583394.9U CN211954476U (en) | 2020-04-17 | 2020-04-17 | Temperature sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020583394.9U CN211954476U (en) | 2020-04-17 | 2020-04-17 | Temperature sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211954476U true CN211954476U (en) | 2020-11-17 |
Family
ID=73165246
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020583394.9U Active CN211954476U (en) | 2020-04-17 | 2020-04-17 | Temperature sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211954476U (en) |
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2020
- 2020-04-17 CN CN202020583394.9U patent/CN211954476U/en active Active
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