JPS61131506A - Electronic compoment - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to electronic components formed by insert molding.

Conventional configurations and their problems In recent years, electronic components are required to be small and highly reliable.

Hereinafter, conventional electronic components will be explained with reference to the drawings.

Figure g1 is a vertical cross-sectional view showing a conventional electronic component using a variable resistor as an example. FIG. 2 is a top view of the substrate of FIG. 1. 1st
In Figures 1 and 2, 1 indicates a center hole 1a and a fixing claw part 1b.
2 is a case made of an insulating material which is integrally formed with the central terminal plate 1 into which a part of the central terminal plate 1 is inserted; 3 has an operating groove 3a at one end;
The other end is a shaft having a small diameter portion 3b inserted into the center hole 1a of the central terminal plate 1. 4 is an insulating substrate,
A horseshoe-shaped resistor film 6 having both ends connected to electrodes 6 is formed on one main surface of the substrate 4, and terminals 7 are connected to the electrodes 6, respectively.

Further, a slider 8 made of a conductive material and having spring properties is attached to the small diameter portion 3b of the shaft 3. One side of the slider 8 is in contact with the center terminal plate 1, and the other side is formed with a contact 8a that comes into pressure contact with the resistor film 6. A seat plate 9 is further inserted into the small diameter portion 3b of the shaft 3, and the small diameter portion 3b is inserted into the through hole 4a of the substrate 4, and the substrate 4 is connected to the resistor film 5 and the slider. It is combined with the case 2 so that the contacts 8a of 8 are in contact with each other. Here, the fixing claw portion 1b provided on the central terminal plate 1 is bent toward the substrate 4, and the case≦ and the substrate 4 are fixed. The tip of the small diameter portion 3b of the shaft 3 is caulked to form a caulked portion 3C.

The operation of the variable resistor configured as above will be described below.

First, when a jig such as a screwdriver is engaged with the operating groove 3a provided in the shaft 3 and the shaft 3 is rotated, the sliding member provided so as to rotate together with the shaft 3 is rotated. The contact point 8a of the mover 8 slides on the resistor film 6 to obtain a desired resistance value.

However, the above configuration has the disadvantage that when soldering electronic components to a printed wiring board, etc., it is easy for 7 lux to enter through the gap created between the case 2 and the board 4. .

OBJECTS OF THE INVENTION In view of the above-mentioned drawbacks, the present invention provides an electronic component having a structure that prevents flux used during soldering etc. from penetrating into the electronic component.

Structure of the Invention In order to achieve this object, the electronic component of the present invention includes a WCL case made of an insulating material having an opening formed integrally with the lead-out terminal into which a part of the lead-out terminal is inserted, and a substrate. The second case and the first case are combined so as to seal the opening of the first case, and the second case made of an insulating material seals the substrate. This configuration makes it difficult for flux and the like to enter through the gap created between the first case and the substrate that are combined.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 3 is a longitudinal sectional view showing an embodiment in which the electronic component of the present invention is employed in a variable resistor. FIG. 4 is a longitudinal cross-sectional view showing the central terminal plate, shaft, and case integrally formed in FIG. 3 before assembly. Figure 6A.

B is a top view and a front view of the substrate of FIG. 3, respectively. In FIGS. 3 to 5, reference numeral 14 denotes a substrate made of an insulating material, on the main surface of which a horseshoe-shaped resistor film 15 is formed, each of which is connected to an electrode 16 at both ends. i
16 are connected to terminals 17, respectively. 11 is a central terminal plate having a center hole 11a; 13 is a central terminal plate having an operating groove 13a at one end and a small diameter portion 13b at the other end;
This is a shaft inserted into the center hole 11a of. 12 has an opening 12a, and the center terminal plate 11 and the shaft 13
This is a first case made of an insulating material that is integrally formed by inserting each part of the case. The shaft 13 has the small diameter portion 1
A slider 18 made of a conductive material having spring properties is attached so as to engage with and rotate together with the slider 3b. One side of the slider 18 is in contact with the center terminal plate 11, and the other side is formed with a contact 18a that comes into pressure contact with the resistor film 16. A seat plate 1 is further provided on the small diameter portion 13b of the shaft 13.
9 has been inserted.

Here, the substrate 14 is further arranged so that the resistor film 15 and the contact point 18a of the slider 18 are in contact with each other, and one end surface of the shaft 13 is opposite to one main surface of the substrate 14. After the cases 12 are assembled so as to seal the opening 12a, the substrate 14 is temporarily held by a temporary holding means, which is omitted in this embodiment, and a second case 2o made of an insulating material is attached. the second case 2o and the first case 12 so as to seal the other main surface side of the substrate 14.
are integrally formed.

The operation of the variable resistor configured as above will be described below.

1. The operating groove 13a provided in the shaft 13
When a jig such as a K screwdriver is engaged and the shaft 13f is rotated, the contact point 18a of the slider 1B, which is provided to rotate together with the shaft 13, will move against the resistor skin l[
16 to obtain the desired resistance value. Further, the second case 2o and the first case 12 are arranged so that the other main surface side of the substrate 14 is sealed by the second case 2°.
In particular, when soldering,
The variable resistor can have a structure that prevents flux from penetrating through the gap formed between the first case 12 and the substrate 14.

In addition, although the variable resistor was shown as an example in the above embodiment,
It goes without saying that the present invention is equally applicable to variable air conditioners, switches, etc.
1st. The insulating material constituting the second case 12°2o is of the same type, J! It doesn't matter what species it is.

Effects of the Invention As described above, the present invention provides a part of the output terminal with an input/output terminal.
A first case made of an insulating material having an opening integrally formed with the lead-out terminal and a substrate are combined so as to seal the opening of the first case, and a first case made of an insulating material. Since the second case and the first case are integrally formed so as to seal the board in the second case, soldering can be performed through the gap created between the first case and the board. It has a structure that prevents the intrusion of tools such as tools used during
It is possible to obtain a robust and compact electronic component, which has great practical effects.

[Brief explanation of drawings]

Fig. 1 is a vertical cross-sectional view of a conventional electronic component using a variable resistor as an example, Fig. 2 is a top view of the board shown in Fig. 1, and Fig. 3 is a variable resistor using the electronic component of the present invention. FIG. 4 is a longitudinal sectional view showing the embodiment, and FIG. 6A is a longitudinal sectional view showing the central terminal plate, shaft, and case integrally formed before assembly in FIG.
B is a top view and a front view of the substrate of FIG. 3, respectively. 12...First case, 12a...Opening, 13...Shaft, 14...Substrate, 1T
......Output terminal (terminal), 2o...2nd
case. Name of agent: Patent attorney Toshio Nakao and one other name
! Figure 2

Claims (4)

[Claims] (1) A first part made of an insulating material into which a part of the lead-out terminal is inserted and has an opening formed integrally with the lead-out terminal.
The case and the substrate are combined so as to seal the opening of the first case, and the second case and the substrate are combined so as to seal the substrate with a second case made of an insulating material. An electronic component characterized by being integrally formed with a first case. (2) The electronic component according to claim (1), wherein the first case and the second case are made of the same type of insulating material. (3) The electronic component according to claim (1), wherein the first case and the second case are made of different insulating materials. (4) The electronic component according to claim (1), which has a rotating shaft, and one end surface of the rotating shaft is provided so as to face one main surface of the substrate.