JPH0218552Y2 - - Google Patents

Description

[Detailed Description of the Invention] (1) Technical Field of the Invention The present invention relates to an improvement of a gas-filled discharge tube type lightning arrester for communication, which has a gas discharge gap to protect communication equipment from lightning surges and the like.

(2) Prior art and its problems Traditionally, gas-filled discharge tube type lightning arresters (hereinafter referred to as lightning arresters) for communication use have a cylindrical insulating tube whose end protrudes inward from its open end surface in the shape of a truncated cone. It has a button shape and is sealed with a partial electrode. by the way,
With recent advances in electronics, button-shaped lightning arresters are increasingly being mounted on printed circuit boards, and are mounted horizontally on the printed circuit boards via terminals. In this case, the terminals cause the device to be placed in an unstable horizontal position, and the overall length and tube diameter are large, so the disadvantage is that the mounting space becomes large. In particular, a button-shaped multi-pole lightning arrester has cylindrical insulating tubes and intermediate electrodes arranged in the longitudinal direction of the tube according to the number of poles, so the overall length has to be even larger. Moreover, since the cylindrical insulation tube is long,
Heat dissipation efficiency during continuous discharge was low, and there was a high risk of open failure due to heat, and other semiconductor elements were also affected by the heat.

In place of the above button-shaped lightning arrester, JP-A-56-121278
A flat and thin lightning arrester shown in the publication has been developed. In this thin lightning arrester, an insulating spacer having a hollow chamber is formed into a rectangular shape, one open end face of the insulating spacer is sealed with a common electrode, and a plurality of open end faces on the other side opposite to this are sealed with a common electrode. It has a structure in which individual electrodes are arranged in parallel, and a sealing ceramic is laminated and sealed on the individual electrodes.

According to the above structure, it is necessary to use a sealing ceramic for sealing the individual electrodes, and the sealing ceramic becomes bulky, making it impossible to achieve a thinner design and increasing costs. Furthermore, since the individual electrodes are shielded by the sealing ceramic, the heat dissipation efficiency differs between the common electrodes and the common electrodes. Moreover, due to the presence of the sealing ceramic, the individual electrodes had to be arranged in parallel taking into consideration the protruding positions of terminals, etc., and any other arbitrary arrangement was not possible.

Furthermore, in general, when sealing an electrode to ceramic, specifically brazing it, the current situation is that strong sealing cannot be obtained unless a metallized layer is provided on the ceramic in advance. Therefore, when a plurality of individual electrodes are brazed with an insulating spacer and sealing ceramic, a metallized layer must be provided for each individual electrode arrangement interval, but in order to arrange the metallized layers at intervals on the same plane, This required very tedious work, such as putting on a mask.

(3) Purpose of the invention The present invention was developed in view of the above-mentioned circumstances. It minimizes the mounting space on the printed circuit board, supports computerization, and provides good heat dissipation effects. Its purpose is to do so.

(4) Features of the invention The feature of the thin multi-pole gas lightning arrester for communications according to the invention is that the other side of the insulating spacer is individually opened, and the end face around each opening is formed into an individual opening end face by a partition. The end face of each individual opening is sealed with each individual electrode.

Hereinafter, the present invention will be explained based on the drawings.

(5) An embodiment of the invention Figures 1 to 3 show an embodiment of a thin multi-pole gas arrester for communications according to the invention, with Figure 1 being an overall perspective view as seen from the back side, Figure 2 is a partially cutaway perspective view of the insulating spacer seen from the back, and Figure 3 is a partially cutaway perspective view of the insulation spacer.
It is a sectional view taken along the line - in the figure. The drawing shows a five-pole implementation.

Therefore, a thin multi-pole gas lightning arrester for communications (hereinafter referred to as a thin lightning arrester) includes an insulating spacer 1,
The common electrode 2 and the plurality of individual electrodes 3, which are arranged to face each other with the insulating spacer 1 in between, have a generally wafer-like appearance as a whole, and the inside is sealed with gas. The insulating spacer 1 is formed into a thin shape using an insulating material such as ceramic, and has an internal common hollow chamber 4 that opens toward both sides of the thin shape, and has a rectangular shape on the outside as a whole. To be more specific, on one side of the insulating spacer 1, there is a frame-shaped common opening end surface 5 having an opening having approximately the same diameter as the common hollow chamber 4.
is formed, and a metallized layer 6 is formed on the common opening end surface 5.
is attached. On the other side, a plurality of individual hollow chambers 7, . Individual opening end surfaces 8, . . . are formed around the periphery. The individual opening end surfaces 8, . ... is attached. The groove portions 9 are arranged in a lattice pattern as shown in the figure, and the groove width is set in consideration of the dielectric strength voltage of the individual electrodes 3,..., and the groove depth is set according to the requirements for the division of the metallized layer 10,... It is set to a certain degree.

Further, the common electrode 2 has a rectangular flat plate shape that substantially corresponds to the rectangular size of the insulating spacer 1, and a substantially L-shaped ground terminal 11 is bent from one side edge toward the individual terminals. Similarly, the individual electrodes 3,... have a rectangular flat plate shape approximately corresponding to the rectangular dimensions of the individual opening end faces 8,..., and the line terminals 12,... are bent from one side edge toward the individual terminals. ing. The common electrode 2 and the individual electrodes 3, . . . are sealed by sandwiching brazing material (not shown) between the opening end surface 5 on one side of the insulating spacer 1 and the individual opening end surface 8, . . Note that the individual electrodes 3, . . . are arranged parallel to the individual opening end faces 8, .

According to the above embodiment, the metallized layers 10, . . . could be separated and deposited without using a mask or the like due to the height difference between the groove portion 9 and the individual opening end faces 8, . As a result, each metallized layer 1
0, . Furthermore, since the line terminals 12, . . . and the ground terminal 11 are made to protrude from the individual electrode side, the thin lightning arrester can be mounted on the printed circuit board depending on the thickness of the thin lightning arrester. In particular, since the individual electrodes 3, .

Further, in the above embodiment, an arbitrary triggering means can be provided. In this case, the inner wall 1 of the individual opening end face 8, ... spaced apart from the common electrode 2
It is desirable to provide conductive wires 14, . This is because the trigger effect is induced in the central part of the common hollow chamber 4 and spreads simultaneously between each individual electrode, and since there is no inner wall in the conductive wire gap, early insulation deterioration from the conductive wire gap is prevented. It doesn't happen.

(6) Another Embodiment of the Invention Figure 4 is a sectional view of essential parts showing another embodiment of the thin lightning arrester. The same reference numerals in the figure as in FIGS. 1 to 3 indicate the same parts, so repeated explanation will be omitted.

In the figure, reference numeral 20 denotes an individual opening end face, and a protrusion 21 as a partition is provided at the center of the individual opening end faces 20, . . . . Individual opening end faces 20,...
are partitioned into low sections by the protruding stripes 21, and are not provided with a metallized layer. On the other hand, an adhesive layer 22 made of, for example, glass is used on the bonding surface of the individual electrodes 3, and this adhesive layer 22 is heated to seal the electrodes 3,... and the individual opening end faces 20,... It is made up of

According to the above embodiment, since the individual electrodes 3,... are accurately positioned by the protruding portions 21, a large number of the individual electrodes 3,... can be arranged with high density, and between the individual electrodes 3,... It also improves dielectric strength. Furthermore, the protruding stripes 21 can simplify the assembly work of the individual electrodes 3, . . . .

(7) Another embodiment of the invention (a) In the above embodiment, the thin lightning arrester was mounted low on the printed circuit board, but it can be mounted vertically as shown in FIG.

In the figure, 30 is a rectangular insulating spacer, 31
32 is a ground end plate extending from the side edge of the common electrode 31; 33 is an individual electrode sealed to the end surface of the individual openings on the other side; 34; 3 is a line end plate extending from the side edge of the individual electrode 33, and 35 is a groove.

According to this embodiment, the ground end plate 32 and the line end plate 34, .
It has the advantage that automatic soldering can be easily performed.
Of course, each end plate 3 is attached in correspondence with other printed circuit boards.
It goes without saying that 2, 34, . . . can be formed as terminals. Furthermore, since there are not many restrictions in the height direction on the printed circuit board, by making it vertical, the mounting space can be substantially reduced.

(b) In each of the above embodiments, the individual electrodes 3, 33
are not limited to horizontal and vertical or parallel arrangement.
As long as the end face of the individual opening can be directly sealed with the individual electrode, any other regular or irregular arrangement can be made, and of course the shape of the individual electrode can be changed accordingly. .

(c) In each of the above embodiments, the terminals 11, 12 and the end plates 32, 34 are integrally molded, but this is not an essential requirement. A similar mounting effect can be achieved by providing a lead wire or the like on the electrode to form a terminal or an end plate.

(8) Effects of the invention As explained above, the invention provides the following effects.

(a) It is possible to provide a thin lightning arrester that does not require a conventional sealing ceramic plate and is made of the insulating spacer and the thickness of two electrodes.
In particular, since sealing ceramic plates are not laminated on multiple individual electrodes, the arrangement of individual electrodes is not restricted, and individual electrodes can be arranged arbitrarily to meet various requirements such as the mounting pitch of the printed circuit board and other elements. There are great advantages that can be achieved.

(b) Since the electrodes are directly attached to the open end surface of the insulating spacer without using conventional sealing ceramic, heat dissipation efficiency can be increased and the probability of open breakdown can be suppressed.

(c) Since the individual opening end faces are divided by the partitions, the arrangement and assembly work of the individual electrodes becomes simple and accurate, and the individual electrodes can be made smaller to the extent that insulation can be maintained between the individual electrodes. High-density multipolarization can be achieved.

[Brief explanation of the drawing]

The drawings show an embodiment of the thin multi-pole gas lightning arrester for communications according to the present invention, and Fig. 1 is an overall perspective view of the same embodiment seen from the back, and Fig. 2 is a partially cutaway perspective view of the insulating spacer seen from the back. Figure 3 is the − of Figure 1.
FIG. 4 is a cross-sectional view of a main part showing another embodiment, and FIG. 5 is a perspective view of a main part showing another embodiment in a vertical configuration. 1, 30... Insulating spacer, 2, 31... Common electrode, 3, 33... Individual electrode, 4... Common hollow chamber, 5... Common opening end surface, 7... Individual hollow chamber,
8, 20... Individual opening end surface, 9, 21, 35...
Division section.

Claims (1)

[Claims for Utility Model Registration] (1) A common electrode is arranged on one side of an insulating spacer having a hollow chamber, and a plurality of individual electrodes are arranged in parallel on the other side opposite to this, and a gas In a sealed thin multi-polar gas lightning arrester for communication, the other side of the insulating spacer is individually opened, and the end face around each opening is divided into individual open end faces by a partition, and each of the above-mentioned individual A thin multi-pole gas lightning arrester for communication use, characterized in that the open end face is sealed with individual electrodes. (2) In the product described in claim 1 of the utility model registration claim, the dividing portion is a groove, and the individual electrodes are brazed to the metallized layer of the end face of the individual opening divided by the groove. A thin multi-pole gas arrester for communication use. (3) In the utility model registration claim described in paragraph 1, the dividing portion is a protrusion, and the individual opening end face partitioned by the protrusion and the individual electrode are sealed with an adhesive. A thin multi-pole gas lightning arrester for communication use, which is characterized by: