JPH0532962Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field The present invention relates to fixed resistors used in fields where insulation and moisture resistance are strongly required, and in particular to fixed resistors that are attached to pipes etc. for antifreeze purposes. It is.

Conventional structure and its problems Conventionally, when a fixed resistor is connected to a covered wire, a covered wire 3 is connected to a terminal 2 that extends outside from a general fixed resistor 1, as shown in Figure 1. The connection is made via a connecting metal 4 that can be fitted and inserted into the connected terminal 2. However, in order to ensure the insulation and moisture resistance of this connection part, an insulating tube 5 is placed over the connection part as shown in Fig. 2, and a moisture-resistant protective material 6 is further applied on top of it as shown in Figure 2. It costs a lot of money.

Purpose of the invention The present invention is intended to eliminate the above-mentioned drawbacks of the conventional technology.The present invention allows the use of conventional techniques for the resistance element, and also connects the resistance element and the covered wire with a simple configuration. Since the connection part is insulated and protected inside the ceramic case, the purpose is to alleviate the inconvenience of having to do the connection work externally, and also to make it possible to connect fixed resistors and covered wires at low cost. Another object of this invention is to provide a concave groove in the ceramic case so that a fixed resistor can be easily and reliably attached to the pipe.

Structure of the invention In the fixed resistor of the invention, a resistor body is constructed by joining a resistance element and a coated wire with an exposed core wire through a metal cap having a resistance connection part and a wire connection part back to back. The main body is inserted into a rectangular ceramic case having a concave groove from one end to the other in the longitudinal direction of the side opposite to the opening surface, which is to be attached to a pipe, etc., and the opening is sealed with an insulating material. , and only the covered electric wire is drawn out from the longitudinal end face of the ceramic case.

According to such a configuration, the resistance element and the covered wire can be connected with a simple configuration. In addition, insulation and moisture resistance can be ensured by inserting the fixed resistor into a rectangular ceramic case with an opening, sealing the opening with an insulating material, and exposing only the covered wire from the ceramic case. etc., the handling of fixed resistors is greatly improved.

DESCRIPTION OF EMBODIMENTS A fixed resistor according to an embodiment of the present invention will be described below with reference to the drawings. FIG. 3 shows the resistor body constituting the fixed resistor in this embodiment.

In FIG. 3, reference numeral 7 denotes a metal cap, in which a resistance connecting portion 7a having a large diameter and a wire connecting portion 7b having a small diameter are integrally molded back to back. Resistance connection portions 7a of the metal cap 7 are inserted into both ends of the resistance element 8, and are attached by being pressed into contact with the pressure contact portions 7a'. Further, a covered electric wire 9 is inserted into the electric wire connection part 7b of the metal cap 7,
The exposed core wire 10 of the covered electric wire 9 is attached by pressure contact at the pressure contact portion 7b'.

As described above, the resistance element 8 and the covered wire 9 are joined by the metal cap 7, thereby forming the resistor body.

Next, as shown in FIG. 4, this resistor body is inserted into a rectangular ceramic case 11 having an opening, the opening is sealed with an insulating material 14, and only the covered wire 15 is inserted into the ceramic case 11 along the longitudinal direction. It is pulled out from the end face of the direction.

In this way, the resistance element 8 and the covered wire 9 are connected via the resistance connection part 7a and the wire connection part 7b of the metal cap 7, so there is no need to connect using a complicated method as in the past. It's convenient. Next, as shown in FIG. 5, an arc-shaped concave groove 12 is formed on the surface of the ceramic case 11 on the side opposite to the opening surface, which is the side to be attached to the pipe, etc., to facilitate attachment to the pipe. It is provided from end to end in the longitudinal direction. Further, as shown in FIG. 4, the fixed resistor of this embodiment is constructed by providing a concave notch 13 in the opening surface to prevent the mounting fitting from shifting.

Moreover, FIG. 6 shows an example in which a large number of fixed resistors of this embodiment are connected continuously via covered wires.

Effects of the Invention As described above, according to the fixed resistor of the present invention, since the resistance element and the covered wire are connected through the metal cap, there is no need to use a conventional connecting fitting. Further, according to the fixed resistor of the present invention, the ceramic case has a concave groove extending from end to end in the longitudinal direction of the surface to be attached to the pipe opposite to the opening surface of the ceramic case, and is parallel to the longitudinal direction of the ceramic case. Since only the covered wires are exposed from the end face of the ceramic case, when the fixed resistor is fixed to the pipe with the mounting bracket, the covered wires do not get in the way and the installation is easy. Moreover, since the covered electric wire is parallel to the longitudinal direction of the pipe, the wiring can be routed in the shortest possible length, which is economical.Furthermore, it is easy to hold the covered electric wire in the middle of the pipe, contributing to the beauty of the wiring.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing a conventional connection between a fixed resistor and a covered wire, and Fig. 2 is a partially cutaway perspective view showing insulation and moisture resistance measures after the conventional fixed resistor and covered wire are connected. . FIG. 3 is a front view of a resistor main body in one embodiment of the present invention, and FIG. 4 is a perspective view of a fixed resistor in the same embodiment. FIG. 5 is a perspective view of a fixed resistor according to the same embodiment, and FIG. 6 is a diagram showing an example in which a large number of fixed resistors according to the same embodiment are connected in succession using covered wires. 1... Fixed resistor, 2... Terminal, 3... Covered electric wire, 4... Connection fitting, 5... Insulating tube, 6...
...Moisture-resistant protective material, 7...Metal cap, 7a...
...Resistance connection part, 7b... Wire connection part, 7a'... Pressure contact part, 7b'... Pressure contact part, 8... Resistance element, 9...
Covered electric wire, 10... Core wire, 11... Ceramic case, 12... Groove, 13... Notch, 14...
Insulating material, 15... Covered electric wire.

Claims (1)

[Scope of utility model registration request] A resistor body is constructed by joining a resistor element and a covered wire with an exposed core wire using a metal cap that has a resistance connection part and a wire connection part back to back, and the resistor body is connected to a pipe, etc. on the opposite side of the opening surface. It is inserted into a rectangular ceramic case having a concave groove from one end to the other in the longitudinal direction on the side to be attached to the ceramic case, and the opening is sealed with an insulating material, and A fixed resistor with only the covered wire exposed to the outside.