JPH0538861U - Feedthrough capacitor - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] To facilitate the classification of feedthrough capacitors of different types even if they have the same appearance. [Structure] A lead wire 6 is passed through a through hole provided in the center of a cylindrical dielectric element 2, and the lead wire 6 is connected to one electrode 3 formed on the dielectric element 2. Further, it has an insulating tubular body 5 for mechanically holding the lead wire 6, and this has a different color or pattern for each type of feedthrough capacitor.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a feedthrough capacitor, and more particularly to a feedthrough capacitor in which it is easy to sort the electrical characteristics and the like.

[0002]

[Prior Art]

 Conventionally, as disclosed in, for example, Japanese Utility Model Publication No. 2-63524, there is already known a feedthrough capacitor using an insulating bead to fix a lead wire. This conventional feedthrough capacitor will be described with reference to FIG. 3. This feedthrough capacitor comprises a feedthrough capacitor body 1, lead wires 6 and beads 5. The lead wire 6 is provided at the center with a collar 7 for determining its position and a protrusion 8 for preventing the lead wire 6 from coming off. The capacitor body 1 is provided with a through hole for inserting the lead wire 6 into, for example, a disk-shaped dielectric element 2, and the surroundings of the through hole on one surface of the dielectric element 2 and the other. The electrodes 3 and 4 insulated from each other are formed near the outer periphery of the surface.

The beads 5 are generally made of an insulating resin and are provided with through holes for inserting the lead wires 6. The lead wire 6 is passed through the through hole of the capacitor body 1, the capacitor body 1 is arranged between the flange 7 of the lead wire 6 and the protrusion 8, and the bead 5 is fitted into the protrusion 8 and press-fitted. In this state, the beads 5 sandwich and hold the capacitor body 1 between the lead wire 6 and the collar 7. Such a feedthrough capacitor is, for example, as shown in FIG. 4, inserted into the through hole of the chassis a on the side of the beads 5 and subjected to a reflow process while keeping the horizontal state, and the lead wire 6 is not shown. It is electrically connected to wiring such as a circuit board. Note that solder 9 is provided in advance on each of the electrodes 3 and 4.

[0004]

[Problems that the device is trying to solve]

 Even though the feedthrough capacitors have the same capacity, there are semiconductor type capacitors and temperature compensating capacitors due to their characteristics. Moreover, their appearance is exactly the same, and it is difficult to distinguish their type. Therefore, even if these capacitors are mass-produced for each type, they may be mixed at the stage of being incorporated into an electronic circuit, and once mixed, it takes a considerable amount of time and effort to distinguish them. Even if a model code corresponding to each characteristic is engraved on the capacitor body, the appearance is the same, so it is very difficult to distinguish the type from the large number of small feedthrough capacitors. In addition, as shown in FIG. 4, when wiring a plurality of through capacitors of different types fixed on the chassis while separating them, miswiring is likely to occur. Also, when inspecting the wiring of the circuit, not only the time is required for checking, but also errors are likely to occur.

The present invention has been made in order to solve such a problem in the related art, and the purpose thereof is to make it possible to easily identify the penetrations according to characteristics even if the appearances are the same. To provide capacitors.

[0006]

[Means for Solving the Problems]

 That is, in order to achieve the above-mentioned object, the present invention comprises a cylindrical dielectric element having a through hole for passing a lead wire in the center, and a pair of electrodes formed so as to face the cylindrical dielectric element. In the feedthrough capacitor including a lead wire that is inserted into the through hole and is electrically connected to the one electrode, and an insulating tubular body fixed to the lead wire, There is provided a feedthrough capacitor characterized in that a tubular body is colored or patterned to indicate the type of feedthrough capacitor.

[0007]

[Action]

 According to the feedthrough capacitor of the present invention described above, the insulating tubular body that is inserted into the lead wire and fixed to one end face of the feedthrough capacitor is given a color or pattern that indicates the type of the capacitor. Even through-capacitors having the same size and shape in appearance, it is possible to distinguish the type by the difference in color and pattern of the insulating tubular body. Therefore, when different types of feedthrough capacitors are mixed, the types of feedthrough capacitors can be easily separated in the step of incorporating the feedthrough capacitors into the device and wiring, and further in the inspection step after the embedded wiring.

[0008]

【Example】

 Hereinafter, an embodiment of the present invention will be described with reference to FIG. Note that FIG. 1 is a side view showing an example of a through capacitor, and since its basic configuration is the same as that of FIG. 3 described in the prior art, description of common parts is omitted and it is mainly related to the present invention. Only the part that does is explained. The tubular dielectric element 2 of the feedthrough capacitor body 1 is provided with the insulating tubular body 5 on the lower surface side thereof with the lead wire 6 penetrating the through hole at the center thereof. This insulating tubular body 5 is substantially the same as the bead 5 shown in FIG. 3 described as a conventional example, and it is fixed to the lower end face of the dielectric element 2 by the protrusion 8 provided on the lead wire 6. Has been done.

There are various types of feedthrough capacitors, such as semiconductor type capacitors (SBL) and temperature compensating capacitors (TC), which have different electrical characteristics. In the present invention, for example, a resin that is colored in advance is used for the insulating tubular body 5, and the color is different depending on the type of the capacitor. For example, use colors that are easy to distinguish, such as white, red, blue, and yellow, and use different colors for each type of feedthrough capacitor. Further, as a coloring method, in addition to the case where the entire insulating tubular body 5 is formed in one color, a pattern may be drawn by using plural kinds of colors as shown in FIGS. 2 (a) and 2 (b). May be displayed as a color code. For example, FIGS. 2 (a) and 2 (b) are perspective views of the insulating tubular body 5 as seen from below, but FIG. 2 (a) shows that the insulating tubular body 5 is laminated with two colors A and B. Similarly, (b) is a diagram showing a case where the insulating tubular body 5 is vertically divided into three colors of A, B, and C.

By color-coding the insulating tubular body 5 in this way, it is possible to easily distinguish the different types of capacitors even if they have the same appearance. In particular, by color-coding in the vertical direction as shown in Fig. 2 (b), the feedthrough capacitors can be mounted on the chassis, and even when wiring is completed, the capacitors can be easily identified by viewing them from the rear side. You can In addition, when assembling and wiring using a plurality of the feedthrough capacitors, it is possible to prevent the wiring from being mistakenly installed in another position or erroneously wired. Furthermore, not only can the wiring inspection that is performed at the completion of the assembly and wiring processes be performed easily, but also when changing the circuit, the types of capacitors can be easily separated, and miswiring is less likely to occur. .. It goes without saying that the present invention can be applied not only to the disk type through capacitor described in the embodiment but also to the stepped through capacitor.

[0008]

[Effect of the device]

 As explained above, by color-coding the insulating tubular body that contacts one end surface of the tubular dielectric element of the feedthrough capacitor, the types of feedthrough capacitors can be easily identified even if they are the same in appearance. As a result, it is possible not only to eliminate misassembly and miswiring, but also to significantly improve work efficiency.

[Brief description of drawings]

FIG. 1 is a side view of a feedthrough capacitor according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a single portion of an insulating tubular body of a feedthrough capacitor according to the present invention, showing an example of color coding of the tubular body portion.

FIG. 3 is a sectional view showing an example of a conventional feedthrough capacitor.

FIG. 4 is a cross-sectional view showing a state in which the feedthrough capacitor is mounted on the chassis.

[Explanation of symbols]

 1 feedthrough capacitor 2 cylindrical dielectric element 3, 4 electrode 5 insulating cylindrical body, beads 6 lead wire

Claims (1)

[Reference number] 0030323-01 [Claims for utility model registration] 1. A tubular dielectric element having a through hole for passing a lead wire in a central portion thereof, a pair of electrodes formed so as to face the tubular dielectric element, and inserted into the through hole. In a feedthrough capacitor comprising a lead wire electrically connected to the one electrode and an insulating tubular body fixed to the lead wire, a color indicating the type of the feedthrough capacitor in the insulating tubular body or A feedthrough capacitor characterized by being patterned.