JPH06307947A - Production of temperature sensor block - Google Patents

Abstract

PURPOSE:To produce temperature sensor block at high efficiency. CONSTITUTION:Lead wires of a temperature sensor component 1 are connected with the lead wires of a resistor component 2 by laser 5 welding to constitute a temperature sensor block and then the characteristics thereof are inspected. An adjusting resistor 3 selected based on the inspection results is then connected with the temperature sensor block by laser 5 welding. Thermal influence on the temperature sensor block is suppressed significantly because of the laser welding and the characteristics can be inspected smoothly without requiring any cooling.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a temperature sensor block formed by connecting lead wires of a temperature sensor component and a resistance component.

[0002]

2. Description of the Related Art A temperature sensor block is formed by connecting a temperature sensor component 1 such as a diode and a resistance component 2 to each other. Conventionally, as shown in FIG. This is done by crimping the lead wires of the components 1 and 2 and soldering 7.

In the temperature sensor block, if the temperature sensor component 1 and the resistance component 2 themselves have heat in the characteristic inspection, the accurate characteristic of the temperature sensor block cannot be detected. After soldering 7 is completed, put 30 in the constant temperature and humidity chamber.
It was left for a minute and allowed to saturate indoors to perform solder thermal cooling, and then the output voltage was measured by the inspection machine 4 to check the characteristics.

In other words, in the order of steps, both parts 1 and 2 are
Lead wire cutting and supply (Fig. 2 (a)), caulking of lead wires (Fig. 2 (b)), soldering 7 (Fig. 2 (c)), solder thermal cooling (Fig. 2 (d)), characteristics It is manufactured in a process called inspection (Fig. 2 (e)). Further, since it is unlikely that a predetermined characteristic can be obtained by the characteristic inspection due to variations in parts, after the characteristic inspection is finished, the adjustment resistor 3 corresponding to the characteristic of the temperature sensor block is connected to the predetermined characteristic. Since it is usual to obtain the characteristic, and the adjustment resistor 3 is also connected by caulking and soldering 7, after the above characteristic inspection, the lead wire of the adjustment resistor 3 is further cut and supplied (see FIG. 3 (a)), caulking of lead wires (Fig. 3 (b)), soldering 7 (Fig. 3 (c)), solder thermal cooling (Fig. 3 (d)), and final characteristic inspection (Fig. 3 (e) )) Is needed further.

[0005]

In this case, two steps of caulking and soldering are required for physical connection, a long time is required for solder heat cooling, and a high degree of skill is required for soldering. In this respect, the production efficiency is low, and a long time that must be left for solder heat cooling is a bottleneck for improving productivity.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a method of manufacturing a temperature sensor block, which can manufacture the temperature sensor block with high efficiency.

[0007]

According to the present invention, however, the lead wire of the temperature sensor component and the lead wire of the resistance component are connected by laser welding, and then the characteristic inspection of the temperature sensor block formed by the connection between them is performed. The present invention is characterized in that the adjustment resistance selected from the results of the characteristic inspection is laser-welded and connected to the temperature sensor block.

[0008]

According to the present invention, since the connection is made by laser welding, the caulking step is unnecessary, and the thermal effect on the temperature sensor block is very small, so that the characteristic inspection can be performed without cooling. However, there is no problem and the time required for cooling is unnecessary.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the illustrated embodiments. As shown in FIG. 1, when connecting a temperature sensor component 1 such as a diode and a resistance component 2, the lead wires of both are cut. Then, after the supply (FIG. 1 (a)), laser welding is performed by irradiating the overlapping portion of the lead wires of the parts 1 and 2 which are in contact with each other with laser 5 (FIG. 1).
(b)). Then, immediately after the connection by laser welding, a characteristic inspection (Fig. 1 (c)) for measuring the output voltage is performed by the inspection machine 3, and the resistance value suitable for the adjustment of the temperature sensor block is controlled in the manufacturing process. Sequencer 6
Communicate to.

Then, for the temperature sensor block requiring the addition of the adjusting resistor 3, the adjusting resistor 3 having the selected resistance value is subsequently supplied (FIG. 1 (d)) and connected by laser welding. (Fig. 1 (e)). Also, for the temperature sensor block to which the adjusting resistor 3 is connected,
Immediately, the characteristic inspection by the inspection machine 4 is carried out (FIG. 1 (f)), and the result is sent to the sequencer 6.

Since the connection is made by laser welding, the connection can be surely made without a caulking step. Further, in the laser welding, the thermal influence exerted on the temperature sensor component 1, the resistance component 2 and the adjusting resistor 3 is extremely large. Because it's small
An accurate characteristic inspection can be performed at the time of the characteristic inspection without a cooling period as in the case of connection by soldering. That is, the number of steps is reduced as compared with the conventional example, and the solder heat cooling step, which takes the longest time, is unnecessary.

[0012]

As described above, in the present invention, since the connection is made by laser welding, the connection can be surely made without a caulking step. Further, in the laser welding, a temperature sensor part, a resistance part, and Since the influence of heat on the adjustment resistance is extremely small, accurate characteristic inspection can be performed during characteristic inspection without the cooling period as in the case of connection by soldering, and the number of steps is reduced. Of course, since the solder heat cooling step, which takes the longest time, is not required, it is possible to greatly improve the production efficiency and easily cope with automation.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a manufacturing process sequence of an embodiment.

FIG. 2 is an explanatory view showing a manufacturing process sequence of a conventional example.

FIG. 3 is an explanatory diagram showing a manufacturing process sequence of a conventional example.

[Explanation of symbols]

 1 Temperature sensor part 2 Resistance part 3 Adjustment resistance 5 Laser

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Katsuji Yamazaki 1048, Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Works Co., Ltd.

Claims (2)

[Claims] 1. A temperature sensor block comprising: connecting a lead wire of a temperature sensor component and a lead wire of a resistance component by laser welding, and then inspecting the characteristics of the temperature sensor block formed by the connection of both. Manufacturing method. 2. The method of manufacturing a temperature sensor block according to claim 1, wherein the adjusting resistor selected from the result of the characteristic inspection is laser-welded and connected to the temperature sensor block.