JPH0350701A - fixed resistor - Google Patents

Abstract

PURPOSE:To arrange a fixed resistor at a prescribed disposition and perform taping by providing guide plates which form the lead conductor outlet of an insulating case so that these guide plates protrude towards the inside of the insulating case. CONSTITUTION:Guide plates 8 are provided so that the outlet 9 of a lead conductor is formed at the inwalls of both ends of a cement case 7 where a resistance element 1 is housed. The guide plates are disposed so as to protrude towards the inside of the cement case 7.

Description

[Detailed description of the invention] Industrial applications FIELD OF THE INVENTION The present invention relates to fixed resistors.

2. Description of the Related Art A conventional fixed resistor consists of a resistor element having a lead conductor 3 welded to a metal cap 2 press-fitted onto both ends of a resistor 1, as shown in FIG. Exit 4
In a fixed resistor inserted into a cement case 4 as an insulating case having a and filled with cement 5,
The cement case 4 and the resistor element need to have a certain size in order to obtain the rated power of the fixed resistor, and in particular, the cement case 4 has a wall thickness of 1 to 100 mm in order to be purchased at a low price.
I used a thinner one of 2+m.

Problems to be Solved by the Invention However, in the conventional configuration, as shown in FIG. 3, there is a difference of 2 to 5 wll11 between the longitudinal inner dimension of the cement case 4 and the overall length e of the resistor element. The resistor element may be inserted into the cement case 4 in a biased manner, and as a result, the lead conductor 3 from outside the cement case 4
This results in a difference of MAX5nun between the left and right lengths. For this reason, when the fixed resistor is wrapped with taping, the length of the lead conductor 3 hanging on the tape becomes longer on one side, and a cutting process of the lead conductor 3 is required in a later process. On the other hand, the length of the lead conductor 3 that hangs over the tape is shortened, and the holding power of the tape is weakened.

Also, when filling with paste cement, as shown in FIG.
Protrusion 6 of cement 5 has occurred.

The above two problems cause inconvenience when taping this fixed resistor. In other words, if the lengths of the left and right lead conductors are different, taping may not be possible, or if the cement protrusion 6 is large, positioning may be difficult due to the restriction of the cement protrusion 6 during taping ( You may not be able to do the taping correctly.

The object of the present invention is to realize taping packaging of high quality in order to solve the conventional problems.

Means for Solving the Problems In order to achieve the above object, the present invention includes a resistor element in which lead conductors are connected to caps attached to both ends of the resistor, and a resistor element in which the resistor element is housed and whose top surface is open. an insulating case having a lead conductor outlet at both ends; an inorganic insulator filled in a gap between the insulating case and the resistor element; and an insulating guide plate forming the lead conductor outlet of the insulating case. It is provided so as to protrude toward the inside of the case.

Effect With the above configuration, the guide plate is provided to allow the resistor element to fit in a predetermined position within the insulation case, and also to prevent the inorganic insulation from coming out from the lead conductor outlet when filling with an inorganic insulation material such as paste-like cement. There is no protrusion. This prevents the resistor element from being inserted into the insulating case unevenly, and the lengths of the lead conductors drawn out on both sides are equal, allowing for accurate taping. Since there is no protrusion, fixed resistors can be lined up and taped in a predetermined position.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to the drawing of FIG. In addition, in Figure 1, Figures 2 to 4
Parts that are the same as those shown in the figures are given the same numbers.

Figures 1a and 1b show a fixed resistor according to an embodiment of the present invention.
) is a sectional view seen from above, and 7 is a cement case in which a resistor element is housed, and has a structure in which the top surface is open and lead conductor outlets 9 are provided at both ends. Reference numeral 8 denotes a guide plate, which is provided on the inner wall at both ends of the cement case 7 to form a lead conductor outlet 9, and projects toward the inside of the cement case 7. In particular, the guide plate 8 is installed so that the clearance between the inserted resistor element and the guide plate 8 in the longitudinal direction of the guide plate is 211I11 or less.

In the fixed resistor configured as described above, the bias of the resistor element within the cement case 7 is reduced, and as a result, the difference in length between the left and right lead conductors from the outside of the cement case 7 is within 2Wn. be held down by Also, when filling the paste-like cement 5, the cement 5 does not protrude from the lead conductor outlet 9.

In the above embodiment, a plate-shaped guide plate was used in order to obtain an inexpensive ceramic case, but the guide plate 8 was used because of the ease of making and using the ceramic case.
Even if the shape is triangular or quadrangular when viewed from the top, or even if it has an R-shape or a C-shape added, the same effects as in the above embodiment can be obtained.

As described above, according to this embodiment, by installing the guide plate 8 that forms the lead conductor outlet 9 of the cement case 7 of the fixed resistor so as to protrude toward the inside of the cement case 7, the following effects can be achieved. is obtained.

(1) The resistor element is not biased in the cement case (
This eliminates variations in the left and right lengths of the lead conductors from the outside of the cement case.

■ No more cement protruding from the lead conductor outlet of the cement case.

Furthermore, the following effects can be obtained.

(3) The step of cutting the lead conductor after taping and packaging the fixed resistor can be omitted, and the variation in the length of the lead conductor applied to the tape is small (and the variation in the holding force of the tape is small).

(Bleeding) By eliminating the protrusion of cement, it is not restricted by cement protrusion, and accurate taping can be achieved by placing the cement in the specified position.

Effects of the Invention According to the present invention, the guide plate forming the lead conductor outlet of the insulating case of a fixed resistor is arranged to protrude toward the inside of the insulating case, so that the resistor is placed at a predetermined position in the insulating case. body elements can be housed therein, and there is no inorganic insulating material protruding from the lead conductor outlet. This makes it possible to make a predetermined fixed resistor and to perform predetermined taping.

[Brief explanation of drawings]

Figures 1a and b are side sectional views and top sectional views showing one embodiment of the fixed resistor of the present invention, and Figures 2a and b are front views and perspective views showing a conventional resistor element and cement case. , 3rd
The figure is a top sectional view showing a conventional cement case in which a resistor element is offset, and FIG. 4 is a perspective view showing a conventional problem in which cement protrudes. 1...Resistor, 3...Lead conductor, 5
... Filled cement, 7 ... Cement case, 8 ... Guide plate, 9 ...
Lead conductor outlet.

Claims (1)

[Claims] A resistor element with lead conductors drawn out from both ends of the resistor, an insulating case in which the resistor element is housed and whose upper surface is open and has the lead conductor outlet at both ends, and a gap between the insulating case and the resistor element. 1. A fixed resistor having an inorganic insulating material filled in the insulating case, and having a guide plate protruding toward the inside of the insulating case and forming a lead conductor outlet of the insulating case.