JPH019126Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a semi-fixed variable resistor used in various electronic devices.

Structure of conventional example and its problems A conventional semi-fixed variable resistor is structured as shown in FIGS. 1 and 2. In the figure, reference numeral 1 denotes an insulating plate having a horseshoe-shaped resistor 2 on its surface, and conductive parts 3 and 4 led out from the ends of the resistor 2 to the end faces. A hole 5 is formed, and a conductive portion 6 extending from the periphery of the hole 5 to the end surface is provided. 7 is a conductive part 6 on the insulating plate 1
This washer 7 has a hole 8 and is placed in electrical contact with the washer 7 . Reference numeral 9 denotes a slider having a hole 11 in the center whose tip 10 is in sliding contact with the resistor 2, and this slider 9 is stacked on the washer 7. 12 are the respective holes 5,
8, 11, and a large diameter portion 14 having at least a larger diameter than the hole 11. The side crimping is installed in such a way that at least the slider 9 can rotate together. Further, a driver adjustment groove 15 is provided in the large diameter portion 14 constituting the rotating shaft 12.

However, such a semi-fixed variable resistor has a problem in that it is difficult to automatically mount it onto a printed circuit board using an automatic machine and transfer it by suction.

Purpose of the Invention The present invention aims to eliminate the above-mentioned conventional drawbacks and to provide a semi-fixed variable resistor suitable for automatic mounting.

Structure of the invention In order to achieve the above object, the semi-fixed variable resistor of the invention has a flat upper surface outer periphery between the slider and the rotary shaft, and a pot-shaped protective plate is provided between the slider and the rotating shaft. This makes it easier to mechanically adsorb the semi-fixed variable resistor, thereby improving the reliability of transporting the semi-fixed variable resistor.

DESCRIPTION OF THE EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 3 and 4.
This will be explained with figures. In Figures 3 and 4, 1
.about.15 are the same as those in the conventional example, so their explanation will be omitted. Reference numeral 16 denotes a mortar-shaped protection plate having a flat portion 17 on the outer periphery of the upper surface, and a hole 18 in the center. Further, the large diameter portion 14 of the rotating shaft 12 is larger than the hole 18 of the protective plate 16. Then, the protective plate 1 is attached to the slider 9.
6, and insert the small diameter portion 13 of the rotating shaft 12 into the holes 18, 10, 8, and 5 of the protective plate 16, slider 9, washer 7, and insulating plate 1, and The entire assembly is assembled by caulking the tip of the small diameter portion 13. At this time, the rotating shaft 12
A slider 9 is attached to rotate at least together with the slider 9. Further, the large diameter portion 14 of the rotating shaft 12 is housed within the protective plate 16 such that the flat portion 17 of the protective plate 16 is higher than the depth of the driver adjustment groove 15 of the rotating shaft 12. moreover,
The flat portion 17 of the protection plate 16 is plated or coated with paint so that the reflectance is significantly lower than that of other portions and parts.

Effects of the Invention In the semi-fixed variable resistor of the present invention configured as described above, the flat portion of the protection plate facilitates mechanical adsorption, and the reliability of transfer of the semi-fixed variable resistor can be improved. In addition, by lowering the reflectance of the flat part of the protective plate compared to other parts and parts, it becomes possible for the machine to recognize the suction part based on the difference in brightness from the surrounding parts, making automatic mounting easier. It can be made even easier.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a conventional semi-fixed variable resistor, FIG. 2 is an exploded perspective view of the same, and FIG. 3 is a sectional view of an embodiment of a semi-fixed variable resistor according to the present invention.
FIG. 4 is an exploded perspective view. 1... Insulating plate, 2... Resistor, 3, 4... First
conductive part, 5... hole, 6... second conductive part, 7...
... washer, 8 ... hole, 9 ... slider, 11 ... hole,
12... Rotating shaft, 13... Small diameter portion, 16... Protective plate, 17... Flat portion, 18... Hole.

Claims (1)

[Claims for Utility Model Registration] (1) A first conductive part having a horseshoe-shaped resistor on its surface, led out from the end of the resistor to the end face, and a first conductive part leading from the periphery of the hole in the center to the end face. an insulating plate having a second conductive part, a washer having a hole in the center overlapped with the second conductive part on the insulating plate, and a center overlapped with the washer and partially in contact with the resistor. a slider having a hole in the bottom; a mortar-shaped protection plate overlaid on the slider and having a flat part on the outer periphery of the upper surface and a hole in the center; and a small-diameter part inserted into each of the holes. A semi-fixed variable resistor comprising: a rotating shaft having a large diameter portion larger than the hole of the protective plate; . (2) The semi-fixed variable resistor according to claim 1, which is a utility model, and is formed by having a flat portion on the outer periphery of the upper surface of the protective plate having a lower reflectance than other parts and parts.