JPH0875566A - Thermistor temperature sensor and method for manufacturing it - Google Patents

Abstract

PURPOSE: To provide a thermistor temperature sensor wherein assembling can be easily automated and which is superior in productibility. CONSTITUTION: Two metal frames 15 having a caulking allowance 17 are fixedly buried and the projection of an insulating plate 16. When the insulating plate 16 is fixed, the edge position of the metal frames 15 is stabilized, a thermistor 11 is easily inserted therein, and connected by solder. Next, a conductor part 18 of a covered conductor 13 is inserted in the caulking allowance 17, and connected thereto by crimping. Next, a part of the thermistor 11, the metal frame 15, the covered conductor 13, and furthermore the projection of the insulating plate 16 are covered by an insulating resin 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thermistor temperature sensor used for temperature detection and temperature control, and a method for manufacturing the thermistor temperature sensor.

[0002]

2. Description of the Related Art Recently, thermistor temperature sensors have been used in automobiles.
It is used in various fields such as home appliances and industry, and the market size is increasing year by year.

A conventional thermistor temperature sensor will be described below. FIG. 3 is a perspective view including a partially broken surface of a conventional thermistor temperature sensor. In FIG. 3, the thermistor 1 and two lead wires 3 are connected by a solder 2a, the two lead wires 3 and two covered lead wires 4 are connected by a solder 2b, and the thermistor 1 and the leads are connected. A part of the wire 3 and the covered lead wire 4 is covered with an insulating resin 5.

[0004]

In the above structure, when the coated lead wire 4 is connected, the positioning of the lead wire 3 is unstable, and the holding when moving to the next process becomes unstable, which is a problem. There was also a problem that the dimensional accuracy was poor and it became an obstacle in constructing an automated line.

It is an object of the present invention to provide a thermistor temperature sensor which can be easily assembled and automated and has excellent productivity.

[0006]

In order to achieve this object, the present invention is to fix a pair of metal frames with insulating plates,
A thermistor is connected to the metal frame, the thermistor and the coated lead wire are connected via the metal frame, and at least a part of the thermistor, the metal frame and the coated lead wire are covered with an insulating resin.

[0007]

According to this structure, by holding and fixing the insulating plate, the positioning of the metal frame is stabilized, and the connection between the thermistor and the coated lead wire can be easily automated. Further, when moving to the next step, it is possible to move with high accuracy by holding the insulating plate, and it is possible to easily construct an automated line, which improves productivity.

[0008]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view including a partially broken surface of a thermistor temperature sensor according to an embodiment of the present invention. In FIG. 1, a pair of metal frames 1 is attached to an insulating plate 16.
5 is connected to one end, the thermistor 11 is connected to the other end of the metal frame 15 by the solder 12, and the coated lead wire 1
3, the conductor portion 18 is connected by crimping the crimping margin 17 to the central portion of the metal frame 15, and further, the thermistor 11, the metal frame 15 and a portion including the conductor portion 18 of the coated lead wire 13 and the insulating plate 16. Part of the insulation resin 1
Covered with 4.

The assembling procedure of the thermistor temperature sensor constructed as above will be described with reference to FIG.

Two metal frames 15 having a crimping margin 17 at the center are embedded and fixed to the protrusions of the insulating plate 16. Further, a plurality of metal frames are embedded in the insulating plate 16 at predetermined positions via the feed holes 19. By mechanically fixing the insulating plate 16, the metal frame 15
The tip position of is stable and the thermistor 11 is the metal frame 1.
It is easily inserted into the tip of the wire 5 and connected by the solder 12. Next, the insulating plate 16 is held and moved to the next step, and the conductor portion 18 of the coated lead wire 13 is inserted into the crimping margin 17 of the metal frame 15 and connected by crimping. Similarly, after moving to the next step, after covering the thermistor 11, the metal frame 15, a part including the conductor portion 18 of the coated lead wire 13, and further the protruding portion of the insulating plate 16 with the insulating resin 14, the resistance value, etc. Of the insulating plate 16 is performed,
The part is cut.

As described above, according to the present invention, the insulating plate 1
By fixing 6, the positioning of the metal frame 15 is stabilized, automation at the time of connecting the thermistor 11 and the coated lead wire 13 can be easily performed, and by holding the insulating plate 16, the next step is performed. Since it can be moved accurately, it is easy to build an automated line. Further, by forming the feed holes 19 in the insulating plate 16 and embedding a plurality of pairs of metal frames 15, it is possible to provide a thermistor temperature sensor having higher productivity.

Although the solder 12 is used to connect the thermistor 11 and the metal frame 15 in this embodiment, they may be connected by adhesion, crimping or welding, and the coated lead wire 13 may be used.
It goes without saying that the same effect can be obtained by connecting the metal frame 15 with the metal frame 15 by soldering or welding.

Further, the cutting points of the insulating plate 16 are A and B, but it is needless to say that the same effect can be obtained in other portions, and particularly when the cutting is performed only in the A section, the feed hole is formed. There is a unique effect that 19 can be used as a mounting hole for the sensor.

Further, by providing a groove in the insulating plate 16 and installing the coated lead wire 13 in this groove, the coated lead wire 1
The specific effect that 3 is stable is obtained.

[0015]

As described above, according to the present invention, the positioning of the metal frame is stabilized, and the connection between the thermistor and the coated lead wire can be easily automated. Furthermore, when moving to the next step, it is possible to move with high accuracy by holding the insulating plate, and an automated line can be easily constructed.

Further, by forming the feed holes in the insulating plate and embedding a plurality of pairs of metal frames, the productivity can be further improved.

Furthermore, the feed hole can be used as a mounting hole for the sensor.

[Brief description of drawings]

FIG. 1 is a perspective view including a partially broken surface of a thermistor temperature sensor according to an embodiment of the present invention.

FIG. 2 is a perspective view illustrating a manufacturing process of the thermistor temperature sensor in one embodiment of the present invention.

FIG. 3 is a perspective view including a partially broken surface of a conventional thermistor temperature sensor.

[Explanation of symbols]

 11 Thermistor 13 Coated lead wire 14 Insulating resin 15 Metal frame 16 Insulating plate 18 Conductor part

Claims (4)

[Claims] 1. An insulating plate, a pair of metal frames having one end fixed to the insulating plate, a thermistor connected to the other end of the metal frame, and a coated lead wire connected to the thermistor via the metal frame. A thermistor temperature sensor comprising at least the thermistor, the metal frame, and an insulating resin covering the conductor portion of the coated lead wire. 2. The thermistor temperature sensor according to claim 1, wherein a crimping margin is provided on the metal frame, and the metal frame and the coated lead wire are connected by using the crimping margin. 3. A pair of metal frames are fixed to the insulating plate,
Next, after connecting the thermistor to the metal frame, the coated lead wire is connected to the metal frame, and then the thermistor temperature that covers at least the thermistor, the metal frame and the conductor portion of the coated lead wire with an insulating resin. Sensor manufacturing method. 4. A plurality of pairs of metal frames are fixed at one end to an insulating plate, and the thermistors are connected to the other ends of the pair of metal frames, and then the coated lead wires are connected to the metal frames. Then, a method of manufacturing a thermistor temperature sensor, in which at least the thermistor, the metal frame, and the conductor portion of the coated lead wire are covered with an insulating resin, and then the insulating plate is cut in each range including a pair of metal frames.