JPS59213101A - Power type coated wiring resistor - 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 Application of the Invention] The present invention relates to a power-type coated wire-wound resistor, and more particularly to a silicon-coated resistor.

[Background of the invention]

Figure 1 is a front view (a) of a conventional power type coated wire-wound resistor.
, shows a side view (b). In FIG. 1, 1 is an insulator such as an insulator, on the surface of which a resistance wire 2 serving as a heating element is wound in a coil shape, and external connection terminals 3 are attached to both ends of the resistance wire 20. In FIG. The terminal 3 is made by processing a flat plate into a circular shape using a conductive material such as copper or brass, and crimping the connection part with a rivet 4. Also, a convex part (part A) is provided on the opposite side from the crimping side. 9. After inserting the terminal 3 into the insulator tube 1, the structure is such that the insulator tube 1 is tightened by tightening the convex portions on both sides. In addition, after attaching the terminal 3 to the resistance wire 2,
Connect to terminal 3 by soldering, etc.

Further, the terminal 30B portion has a structure in which the protrusions are provided at symmetrical positions on the left and right terminals, and the protrusion of the terminal 3 is fitted into a recess provided on the side surface of the tube 1. That is, insert the terminal 3 into the insulator tube 1, fit the convex part of the terminal 3 into the concave part of the insulator tube 1, caulk the overlapping part of the terminal 30 with the rivet 4, and crush the A part of the terminal as described above. The terminal 3 is tightened and fixed to the insulator tube 1 by using the following steps. Reference numeral 5 is a heat-resistant insulating coating such as silicone paint, which is applied to the entire surface of the terminal 3 except for the electrically connected portion after the terminal 3 is attached and the resistance wire 2 is wound, for the purpose of preventing the resistance wire 2 from moving and improving corrosion resistance.

Therefore, the conventional fixing of the terminal 3 of the resistor was based only on the convex portion provided on one side in order to achieve the p1 effect.

However, since the terminal is fixed only on one side of the terminal, the fixing structure is unstable. If this fixation is not secure,
In actual use, it is conceivable that the convex portion of the multi-terminal 3 may shift and rotate due to vibration or the like, causing it to come off the insulator. In addition,
By providing these convex portions on both sides of the terminal, the terminal can be securely fixed. However, on the contrary, it becomes impossible to tighten the terminal.

[Purpose of the invention]

An object of the present invention is to provide a highly reliable power type coated wire-wound resistor that prevents terminals from becoming loose or falling off.

[Summary of the invention]

A feature of the present invention is that recesses are provided on the surfaces of both end portions of the paddle and holes are provided in the terminal portion.

[Embodiments of the invention]

Figure 2 is a front view (a) of the power type coated wire-wound resistor of the present invention.
, shows a side view (b). In the figure, the configuration is the same as the conventional one, but holes in the 0 part of the terminal 3a are provided at two locations on the left and right terminals.

FIG. 3 shows a cross section taken along the line ■-■ in FIG. 2. As shown in FIG. 3, a recess is provided in the side surface of the insulator tube 1a, and a hole is provided in the terminal 3a at approximately the same location.

That is, insert the terminal 3a into the insulator tube 1a, align the hole of the terminal 3a with the recess of the insulator tube 1a, and then attach the multi-terminal 3 to the rivet 4.
By caulking the overlapping part of A and crushing part A of the terminal as described above, the terminal 3a is tightened to the insulator tube 1, and by applying the paint in this state, the paint is injected into this part. Ru. That is, it is clear from the figure that the terminals 3a and the tube 1 can be prevented from rotating by the shearing force of the paint, rather than by adhesion using paint. Of course, also in the case of this structure, as is clear from the figure, even if the positions of the recess and the hole are slightly shifted, the fixation can be ensured.

〔Effect of the invention〕

According to the present invention, misalignment of terminals of a power type coated wire-wound resistor;
Problems such as loosening and falling off can be eliminated.

[Brief explanation of drawings]

FIGS. 1(a) and (b) are structural diagrams of a conventional power type covered wire-wound resistor, and FIGS. 2(a), (b), and 3 are structural diagrams of a power type covered wire-wound resistor according to the present invention. It is a structural diagram. 1.1a...Insulator tube, 2...Resistance wire, 3,3a...
・Terminal, 4... Rivet, 5... Heat-resistant insulation coating. Agent Patent Attorney Akio Takahashi

Claims (1)

[Scope of Claims] 1. A power type support consisting of a resistance wire wound around the surface of a paddle, a terminal wound and fixed on the surface of both ends of the tube, and a heat-resistant insulating coating provided thereon. In the terminal attachment part of the wire-wound resistor, recesses are provided on the surface of both ends of the paddle, a hole is provided in the terminal part at approximately the same location as the recess, and paint is applied to the recess of the paddle through the hole. A power type coated wire-wound resistor, characterized in that the terminal is fixed by injecting the above.