JPH08330104A - Electronic component and manufacturing method thereof - Google Patents

Abstract

(57) [Abstract] [Object] The present invention relates to an electronic component, and an object of the present invention is to properly install an element in a case and to exhibit characteristics as an electronic component. In order to achieve this object, the present invention provides
The case 7, a thermistor element 9 housed inside the case 7, and terminals 8 and 13 mounted in opening portions at both ends of the case 7 are provided, and the thermistor element 9 has a columnar shape. The electrodes 10 and 11 are provided at both ends, and the distance between the diagonal lines 12 on the outer peripheral surface of the electrodes 10 and 11 is larger than the opening distance of the case 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic component such as a glass-enclosed thermistor and a manufacturing method thereof.

[0002]

2. Description of the Related Art A conventional thermistor of that type is shown in FIG. 4, in which a first terminal 2 is inserted into the lower end of a case 1, an element 3 is inserted from the upper end of the case 1, and then the case 1 The second terminal 4 is inserted from the upper end of the case 1 into the case 1, and then the case 1 is heat-shrinked to integrally house these elements 3, the first and second terminals 2 and 4 in the case 1. Was there.

[0003]

The above conventional element 3 is
As shown in FIG. 4, it was flat and provided with electrodes 5 and 6 on the upper and lower surfaces thereof. Therefore, when mounting the element 3 in the case 1, the element 3 must be mounted in the case 1 so that the electrode 6 comes into planar contact with the terminal 2. Since 3 is flat, sometimes the upper and lower electrodes 5, as shown in FIG.
Alternatively, 6 may be obliquely attached to the inner surface of the case 1 in a state in which it is more tightly attached. Then, even if the second terminal 4 is inserted from the upper end of the case 1 in this case, the element 3 is left in an inclined state shown in FIG. 4 or is in an inverted state. Will no longer exhibit its characteristics. Therefore, an object of the present invention is to properly install the element in the case so that the element can exhibit the characteristics as an electronic component.

[0004]

In order to achieve this object, the present invention comprises a case, an element housed in the case, and terminals mounted in openings at both ends of the case, The element is a columnar body, has electrodes at both ends thereof, and has a diagonal distance on its outer peripheral surface larger than the opening distance of the case.

[0005]

With the above construction, since the element is columnar and the diagonal distance of its outer peripheral surface is larger than the opening diameter of the case, this element can be inserted and mounted only in the upright state in the case. Therefore, if the second terminal is then inserted from the upper end of the case, the upper and lower electrodes of this element will come into proper contact with the first and second terminals in a plane, and as a result, the electronic The characteristics of the parts will be exhibited.

[0006]

2 and 3, a cylindrical case 7 made of glass has an inner diameter of 0.8 mm. Reference numeral 8 is a cylindrical first terminal inserted from the lower end of the case 7, and its outer diameter is 0.77 mm. 9
Is a thermistor element in the shape of a regular square pole.
Electrodes 10 and 11 made of silver-palladium are provided. The distance of the diagonal line 12 including the electrodes 10 and 11 on the outer peripheral surface of the thermistor element 9 is 0.9 mm, and the case 7 shown in FIG.
Since it is larger than the opening distance (0.8 mm) of
When putting the thermistor element 9 in the case 7,
As shown in FIG. 2, the thermistor element 9 is mounted on the first terminal 8 in an always standing state.

In this state, the second terminal 13 is inserted into the case 7 from the upper end of the case 7, and as a result, the electrodes 10 and 11 of the thermistor element 9 have the second and first terminals 13 and 8, respectively. Will abut. The first and second terminals 8 and 13 have the same shape, the same size, and the same material, and the lead wire 14 is welded to each of them. Now, in this state, 600 on the outer circumference of the case 7.
When heat of about ℃ is applied, the glass case 7 is melted and shrunk, and as a result, the case 7 is welded to the first and second terminals 8 and 13, and the thermistor element 9 is enclosed. . At this time, the second and first terminals 13 and 8 are in pressure contact with the electrodes 10 and 11 of the thermistor element 9.

[0008]

As described above, the present invention comprises the case, the element housed inside the case, and the terminals mounted in the openings at both ends of the case, and the element is a columnar body. The electrodes have electrodes on both ends thereof, and the distance between the diagonal lines on the outer peripheral surface of the electrodes is larger than the opening distance of the case.

With the above construction, the element has a columnar shape, and the diagonal distance of the outer peripheral surface thereof is larger than the opening diameter of the case. Therefore, this element can be inserted and mounted only in the upright state in the case. Therefore, if the second terminal is then inserted from the upper end of the case, the upper and lower electrodes of this element will come into proper contact with the first and second terminals in a plane, and as a result, Therefore, the characteristics as an electronic component come to be exhibited.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of the present invention.

2 is a cross-sectional view showing the manufacturing process of FIG.

FIG. 3 is a plan view of FIG.

FIG. 4 is a sectional view showing a manufacturing process of a conventional example.

[Explanation of Codes] 7 Case 8 First Terminal 9 Thermistor Element 10 Electrode 11 Electrode 13 Second Terminal

Claims (2)

[Claims] 1. A case, a device housed inside the case, and terminals mounted in opening portions at both ends of the case, wherein the device has a columnar shape, and electrodes are provided at both ends thereof. An electronic component that has a diagonal distance on its outer peripheral surface that is greater than the opening distance of the case. 2. A case, a device housed inside the case, and terminals mounted in openings at both ends of the case, wherein the device has a columnar shape, and electrodes are provided at both ends thereof. The distance of the diagonal line of the outer peripheral surface of the case is larger than the opening distance of the case, the first terminal is inserted into the lower end of the case, and then the element is inserted into the case from the upper end of the case. Then, a method of manufacturing an electronic component, in which the second terminal is inserted into the case from the upper end of the case, and then the case is thermally contracted.