JP2004093253A - Sensor component - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sensor component at a low cost. <P>SOLUTION: The sensor part is composed of a case 12 having an opening part 11 for housing a thermistor 2 and a cap 13 for closing the opening part 11 of the case 12. A first and a second insertion through-holes 31 and 32 through which a first and a second harnesses 33 and 34 are inserted are provided in the case 12. A partition part 51 is extended in a long hole 24 from the innermost wall surface of the case 12 to separate a first space 52 in the extension of the first insertion through-hole 31 and a second space 53 in the extension of the second insertion through-hole 32. A connection through-part 54 communicating with the first and the second spaces 52 and 53 is provided at the tip of the partition part 51. A first and a second leads 63 and 65 of the thermistor 2 are connected to electric wires 61 and 62 of both the harnesses 33 and 34. The thermistor 2 and the second lead 65 are housed in the second space 53, and the first lead 63 which is folded at the connection through-part 54 is housed in the first space 52. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a sensor component having a thermistor for detecting a temperature in an automatic transmission, for example.
[0002]
[Prior art]
Conventionally, in an automatic transmission, a thermistor has been used to measure oil and the temperature in the mechanism, and the thermistor has a resin outer peripheral portion for protection, insulation, adjustment of heat responsiveness and fixing. Was molded in.
[0003]
FIG. 2 is a partial cross-sectional view showing a temperature sensor 102 having a built-in thermistor 101. The temperature sensor 102 is fixed with a resin mold while keeping the distance between the pair of terminals 103, 103, and then the lead wires 104, 104 of the thermistor 101 are welded to the portions of the terminals 103, 103 protruding toward the distal end. This was further resin-molded to cover and protect the thermistor 101.
[0004]
Thereby, protection and insulation of the thermistor 101 are achieved, and responsiveness to heat and fixability to a corresponding portion are enhanced.
[0005]
When using the temperature sensor 102, an electric wire 112 from a harness 111 is soldered to terminals 103, 103 extending rearward. Then, the terminal 103 on which the solder 113 is piled is covered with a cylindrical protective tube 114 to ensure the insulation and corrosion resistance of the terminal 103.
[0006]
[Problems to be solved by the invention]
However, in the case of the temperature sensor 102 as such a sensor component, there is a problem that time is required for the resin molding and equipment cost is required. In addition, soldering of the harness 111 and covering work with the protective tube 114 are required, which also causes a high cost.
[0007]
The present invention has been made in view of such a conventional problem, and an object of the present invention is to provide a sensor component capable of reducing cost.
[0008]
[Means for Solving the Problems]
In order to solve the above problem, in the sensor component of the present invention, in the sensor component including the sensor element, a case provided with an opening for housing the sensor element, and closing the opening of the case. A cap, and the case is provided with an insertion hole through which a pair of covered wires connected to the sensor element are inserted, and is located in a space communicating with each insertion hole, on an extension of one of the insertion holes. A partition is provided for partitioning the first space to be formed and the second space positioned on the extension of the other insertion hole, and the partition is left at the communication portion where the two spaces partitioned at the distal end communicate with each other. Set to length dimension.
[0009]
That is, at the time of manufacture, after the electric wire of the covered wire is fixed to the lead wire of the sensor element via the connector, the connector is welded. Then, each of the covered wires is inserted into each of the insertion holes of the case, and each of the covered wires extending from the case is pulled in a direction of being pulled out from each of the insertion holes. Then, the sensor element connected to the tip of each covered wire is inserted into the case through the opening.
[0010]
At this time, the space located on the extension of each of the insertion holes is separated from the other space by a partition, and the connection between the lead wire of the sensor element and the wire of the covering wire with the electric wire is accommodated in each space. And a short circuit is prevented.
[0011]
In addition, the partition portion is set to have a length such that a communication portion communicating with the respective spaces remains on the distal end side, and a lead wire of the sensor element, the sensor element, and the like are accommodated in the communication portion.
[0012]
Then, the sensor element is accommodated in the case by closing the opening with a cap.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a temperature sensor 1 which is a sensor component according to the present embodiment. FIG. 1A is a cross-sectional view, and FIG. A sectional view along line A is shown.
[0014]
The temperature sensor 1 is provided in an automatic transmission of an automobile and detects an oil temperature and an internal temperature. Inside the temperature sensor 1, a thermistor 2 as a sensor element whose resistance value changes according to the temperature is provided. I have.
[0015]
The temperature sensor 1 includes a case 12 in which an opening 11 for accommodating the thermistor 2 is opened at a distal end, and a cap 13 for closing the opening 11 of the case 12. The case 12 and the cap 13 are both It is formed of a synthetic resin (nylon).
[0016]
The case 12 is formed integrally with a rectangular neck portion 21 and a mountain-shaped head portion 22 connected to the neck portion 21, and a tapered tip portion of the head portion 22 communicates with the opening 11. A large-diameter hole 23 is formed. On the base end side of the head 22, a small-diameter long hole 24 communicating with the large-diameter hole 23 is formed.
[0017]
The neck portion 21 of the case 12 is formed with first and second insertion holes 31 and 32 that are opened on the wall surface at the back of the elongated hole 24, and both the inserted holes 31 and 32 are connected to the elongated hole 24 and the outside. And communicates. The first and second insertion holes 31 and 32 are set to have inner diameters through which the first and second harnesses 33 and 34, which are covered wires, are inserted, respectively. , 34 are inserted.
[0018]
In the elongated hole 24 of the case 12, a partition portion 51 extending toward the distal end from a wall surface at the back of the elongated hole 24 is integrally formed, and the elongated hole 24 is formed by the partition portion 51 by the first portion. The first space 52 is located on the extension of the insertion hole 31 and the second space 53 is located on the extension of the second insertion hole 32. The partition 51 is set to have a length dimension that reaches the end of the elongated hole 24, and the first and second spaces 52 and 53 are formed in the large-diameter hole 23 at the end of the partition 51. A communicating portion 54 that communicates is formed. That is, the partition portion 51 is set to have a length that allows the communication portion 54 to remain at the distal end side.
[0019]
The coatings at the ends of the harnesses 33 and 34 are peeled off, and the electric wires 61 and 62 are exposed. A first lead wire 63 of the thermistor 2 is connected to an electric wire 61 of the first harness 33 via a first connector 64. The first connector 64 is caulked and then welded. It is electrically connected. A second lead wire 65 of the thermistor 2 is connected to the electric wire 62 of the second harness 34 via a second connector 66, and the second connector 66 is welded after being caulked. Are electrically connected by
[0020]
Each of the connectors 64 and 66 is set to have a larger diameter than each of the insertion holes 31 and 32, and is configured so as to be prevented from being drawn out from the corresponding insertion holes 31 and 32 to the outside. Further, the thermistor 2 and the second lead wire 65 are housed in the second space 53, and the first lead wire 63 extending from the thermistor 2 is folded back at the communication portion 54, It is accommodated in the first space 52.
[0021]
This case 12 is formed in substantially the same shape as a conventional temperature sensor which is resin-molded. The amount of resin used and the volume of the internal space are set so that the response of the thermistor 2 to the external temperature is almost the same as that of the conventional temperature sensor. Thus, the temperature sensor can be replaced with a conventional temperature sensor.
[0022]
Further, adjustment holes 71, 71 are formed on the outer surface of the case 12, as shown in FIG. Thereby, the amount of resin used in the case 12 and the communication space between the outside and the inside can be adjusted by the presence or absence of the adjustment holes 71, 71, and the responsiveness of the thermistor 2 to the external temperature can be adjusted. ing.
[0023]
The cap 13 is inserted through the opening 11 of the case 12 and abuts on the small-diameter portion 81 accommodated in the large-diameter hole 23 and the opening edge of the opening 11 to regulate the insertion amount. It is formed integrally with the large diameter portion 82. A concave portion 83 is formed at the end of the small diameter portion 81 to prevent interference with the first lead wire 63. As shown in FIG. 1B, a locking projection 84 is projected from the outer surface of the small-diameter portion 81, and the locking projection 84 fits the cap 13 to the case 12. In the worn state, the case 12 is locked by a locking hole 85 formed at the tip of the case 12 so as to prevent the case 12 from coming off.
[0024]
In the present embodiment according to the above configuration, when manufacturing the temperature sensor 1, the first and second lead wires 63 and 65 of the thermistor 2 are connected via the first and second connectors 64 and 66 to each other. After connecting and fixing to the electric wires 61 and 62 of the harnesses 33 and 34, the connectors 64 and 66 are welded and electrically connected.
[0025]
Then, the respective harnesses 33 and 34 are inserted into the first and second insertion holes 31 and 32 of the case 12, respectively, and the respective harnesses 33 and 34 extending from the case 12 are removed from the respective insertion holes 31 and 32. Pull in the pulling direction. Thereby, the thermistor 2 connected to the tip of each of the harnesses 33 and 34 can be inserted into the case 12 through the opening 11.
[0026]
At this time, the first and second spaces 52, 53 located on the extensions of the insertion holes 31, 32 are partitioned by the partition 51, and the lead wires 63, 65 of the thermistor 2, the harness 33, The connection portion between the electric wires 34 and the electric wires 61 and 62 can be accommodated in the respective spaces 52 and 53 to prevent a short circuit.
[0027]
The partition 51 is set to have such a length as to leave a communication portion 54 communicating with each of the spaces 52 and 53 on the distal end side, and the lead wires 63 and 65 of the thermistor 2 and the thermistor 2 itself. In the present embodiment, the folded portion of the first lead wire 63 can be accommodated in the communication portion 54. The thermistor 2 can be housed in the case 12 by closing the opening 11 with the cap 13.
[0028]
As described above, the harnesses 33 and 34 to which the thermistor 2 is connected are pulled in the directions of being pulled out from the insertion holes 31 and 32, thereby housing the thermistor 2 in the case 12, and then closing the opening 11 with a cap. The thermistor 2 can be housed in the case 12 and protected by simply closing it at 13.
[0029]
For this reason, after fixing the terminal with a resin mold, a thermistor is connected to this terminal, and furthermore, it is possible to eliminate each molding process and to reduce equipment costs as compared with the conventional method in which the thermistor is covered and protected by resin molding. it can.
[0030]
Further, as described above, the partitioning portion 51 in the case 12 can prevent short-circuiting of the connection portions between the lead wires 63 and 65 of the thermistor 2 and the electric wires 61 and 62 of the harnesses 33 and 34. There is no need for a molding step of separating the terminals and fixing them with resin to secure insulation.
[0031]
Since the connection between the thermistor 2 and the electric wires 61 and 62 can be accommodated in the case 12, the electric wire of the harness is soldered to the terminal extending from the temperature sensor, and the terminal on which the solder is piled up. The number of parts and work steps to be used can be reduced as compared with the related art in which a protective tube is covered to secure insulation and corrosion resistance.
[0032]
Therefore, the cost of the temperature sensor 1 can be reduced. Here, in the present embodiment, the manufacturing cost could be reduced by 41% as compared with the conventional temperature sensor molded with resin.
[0033]
In the present embodiment, the case where the opening portion 11 provided in the case 12 is closed with the cap 13 to prevent the flow of the hydraulic oil in the automatic transmission between the inside and the outside is taken as an example. However, the present invention is not limited to this.
[0034]
As an example, the case 12 is formed of a resin having transparency, and after the thermistor 2 is housed, the inside of the case 12 is filled with an ultraviolet-curing adhesive, and the inside of the case 12 is irradiated with ultraviolet light to remove the internal adhesive. It may be cured.
[0035]
【The invention's effect】
As described above, in the sensor component of the present invention, the covered wire to which the sensor element is connected is pulled in the direction of being pulled out from the insertion hole, so that the sensor element is accommodated in the case, and then the opening is opened. The sensor element can be housed and protected in the case simply by closing the part with the cap.
[0036]
For this reason, after fixing the terminal with a resin mold, the sensor element is connected to this terminal, and furthermore, each molding step is eliminated and the equipment cost is eliminated as compared with the conventional method in which the sensor element is covered and protected by resin molding. be able to.
[0037]
At this time, a space defined by a partition portion is formed on an extension of each insertion hole through which each covered wire is inserted, and a connection portion between the lead wire of the sensor element and the wire of the covered wire is formed in each space. By accommodating, for example, a short circuit can be reliably prevented. This eliminates the need for a conventional molding step of separating the terminals and fixing the terminals with resin to ensure insulation.
[0038]
Since the connection between the sensor element and the wire of the covered wire is housed in the case, the wire of the harness is soldered to the terminal extending from the temperature sensor, and the protective tube is attached to the terminal on which the solder is provided. Parts and work processes can be reduced as compared with the related art in which insulation and corrosion resistance are ensured by covering the components.
[0039]
Therefore, the cost of the sensor component can be reduced.
[Brief description of the drawings]
FIG. 1 is a view showing an embodiment of the present invention, in which (a) is a cross-sectional view and (b) is a cross-sectional view along the line AA in (a).
FIG. 2 is a partial sectional view showing a conventional temperature sensor.
[Explanation of symbols]
1 Temperature sensor (sensor parts)
2 Thermistor (sensor element)
11 Opening 12 Case 13 Cap 31 First insertion hole 32 Second insertion hole 33 First harness (covered wire)
34 second harness (covered wire)
51 partition part 52 first space 53 second space 54 communication part

Claims (1)

In a sensor component with a sensor element,
A case provided with an opening for housing the sensor element, and a cap for closing the opening of the case,
The case is provided with insertion holes through which a pair of covered wires connected to the sensor element are respectively inserted, and in a space communicating with each of the insertion holes, a first space located on an extension of one of the insertion holes. A partition section is provided for partitioning the second space located on the extension of the other insertion hole, and the partition section is set to have a length dimension that allows the communication section communicating with the two spaces partitioned on the distal end side to remain. A sensor component characterized by:

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