JPH037910Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a protector that protects various electronic devices connected to it from abnormal voltages such as surges.

Generally, electronic devices such as telecommunication devices are always threatened by abnormal voltages generated by surges and the like, so it is necessary to protect electronic devices from abnormal voltages. In particular, failure of electronic equipment due to abnormal voltage can significantly disrupt daily life, and when a failure occurs, the time and expense required for recovery can be enormous. BACKGROUND ART In recent years, electronic equipment has become less dielectric due to the use of semiconductors, and therefore protectors have become an important element in increasing the reliability of electronic equipment.

There are various types of protectors, but
The present invention relates to a circuit constructed with the circuit diagrams shown in FIGS. 13A, B, and C, for example. That is, it is equipped with connection terminals 1, 1', 2, 2' and 3, and has a three-pole lightning arrester 4 and varistors 5a, 5b, 5.
This protector consists of an overvoltage protector consisting of elements c and 5d, and each element consisting of a current limiting resistor 6.The neutral electrode 7 of the lightning arrester 4 is grounded, and the other two electrodes 8 and 9 are used for protection. It is connected to the line that is connected to the electronic equipment that is used. Then, the surge generated on the line is handled by the three-pole lightning arrester 4 and the varistors 5a and 5.
If b exists, it is grounded through it.
In this case, even when a surge occurs on one line, the three-pole lightning arrester 4 operates to protect the electronic equipment by preventing a voltage difference between the lines. Also barista 5
Since the terminal voltage of a, 5b, 5c, and 5d becomes low when the three-pole lightning arrester 4 is activated, the voltage applied to the line prevents a follow-on current from occurring after the surge has stopped.

The object of the present invention is to provide a protector which is configured to facilitate assembly of the device shown in the circuit diagrams shown in FIGS. 13A, B, and C and to provide high reliability.

Embodiments of the present invention will be described below with reference to the drawings.

Reference numeral 10 denotes an insulating base, and a convex part 11 is integrally formed in the center of the upper part, and inside the convex part accommodates overvoltage protectors such as lightning arresters and varistors, and conductive metal fittings such as terminal boards and contact plates. recess 12 for
Further, connection terminals 1, 1', 2, 2', and 3 are arranged on the insulating base 10, and the convex part 1
A lid body 13 for closing the recess 12 is attached on top of the recess 12.

When constructed according to the circuit diagram of FIG.
0c, 20d and contact plates 25a, 25b, 25
c, 25d, auxiliary contact plates 30a, 30b, and presser plates 31a, 31b are accommodated.

The three-pole lightning arrester 4 is formed in a circular shape, with a neutral electrode 7 disposed in the center, two other electrodes 8 and 9 disposed on both sides, and a lead wire inserted through the neutral electrode 7 for connection. A hole 7a is formed. Further, the varistors 5a and 5b are entirely formed into a thin disk shape, and electrodes are arranged on both sides.

Also, terminal plates 20a, 20b, 20c, 20d
, an elastic contact piece 21 is formed in the center of a rectangular conductive metal thin plate, and contact plates 25a, 25 are formed at the bottom.
A locking piece 22 is formed for locking the outer edges of the wires b, 25c, and 25d, and a lead wire connection insertion hole 2 is formed.
3 is formed. Also, the contact plates 25a, 25
b, 25c, and 25d are composed of a relatively thick conductive annular metal fitting 26 and a circular conductive thin metal plate 27 attached to one side of the metal plate 26, and this metal plate 27 has a plurality of radially outwardly extending elastic bands. A contact piece 28 is formed. Further, the auxiliary contact plates 30a, 30b are formed in a dish shape, and the holding plates 31a, 31b are rectangular metal plates with setscrews 33a, 33b in the center.
A female thread 32 for screwing is provided.

On the other hand, in the recess 12 of the insulating base 10 for accommodating the overvoltage protector and conductive metal fittings, a convex portion 14 for arranging the lightning arrester 4 is formed in the center. The lightning arrester 4 is placed and its height is adjusted, and the neutral electrode 7 of the lightning arrester 4 is fitted into the groove 15 formed in the convex portion 14 for positioning. A circular convex portion 16 is formed on both sides of the convex portion 14 on which the outer peripheral portion of the varistor 5 is placed, and a concave portion 17 is formed at both ends on which the holding plates 31a and 31b are placed. 18 is a relief notch for the screws 33a and 33b formed on the outside of the recess 17; 19 is a cover 1;
This is the engagement uneven portion with 3. Recess 1 of insulating base 10
The depth of the overvoltage protector and the conductive metal fittings accommodated therein is set to be sufficient to accommodate substantially the lower half of the overvoltage protector and conductive metal fittings. Therefore, the lid body 13 disposed above the recess 12 also has a recess 13a having the same shape as the recess 12, so that substantially the upper half of the above member can be accommodated therein. That is, 14a is a convex portion corresponding to the convex portion 14, and 15a is a convex portion corresponding to the convex portion 14.
16a is a groove corresponding to the groove 15, and 16a is a circular convex portion 1.
17a is a concave portion corresponding to the concave portion 17, 18a is a relief notch corresponding to the relief notch 18, and 19a is an engagement uneven portion corresponding to 19. Further, a heat radiation hole 35 is formed in the upper surface of the lid body 13, and a name plate 36 is disposed on the upper surface.

By the way, when constructing a protector based on the circuit diagram of FIG. 13A, the recess 12 of the insulating base 10 is
A lightning arrester 4 is placed in the center with electrodes 8 and 9 facing both sides, and terminal plates 20a and 20a are placed on both sides at intervals.
20d are arranged with the elastic contact piece 21 facing outward, and the neutral electrode 7 of the lightning arrester 4 and the terminal plate 2
0a, 20d, one end of the lead wire 40 is soldered to the lower end of the connection terminal 3, 1', 1 in the recess 10a formed on the back surface of the insulating base 10, and the lead wire 40 is inserted into the bottom of the recess 12. Solder the other ends of 41 and 42.
Further, presser plates 31a and 31b, each having set screws 33a and 33b attached to both ends of the recess 12, are placed facing each other in an upright manner.

The connecting terminals 1, 1', and 3 are attached to the base 1 by locking the enlarged portion 45 formed at the lower end in the recess 10a on the back surface, and inserting the screw portion 46 into the mounting hole of the insulating base 10.
0, and is tightened and fixed from above the base 10 with a nut 47. Further, a shaped connecting plate 48 is attached to the base of the connecting terminals 1, 1', and 3. The lower end of the vertical portion 50 is formed at the lower part of the enlarged portion 45 of the connecting terminal 1, 1', 3 in order to penetrate through the base 10 and protrude into the back side recess 10a, and to ensure the reliability of the electrical connection. The lead wires 40, 4 together with the soldering terminal 52
1 and 42 are connected by soldering. Screw part 4
6 is further fitted with a spring washer 53 and a nut 54 to enable connection of a transmission line.

Therefore, the auxiliary contact plate 30a is attached to the elastic contact piece 21 of the electrode plate 20a, and the contact plate 25a, the varistor 5a, and the contact plate 2 are placed between the electrode plate 20a and the lightning arrester 4.
5b and the electrode plate 20b are inserted, and the contact plate 25a,
The elastic contact pieces 28 of 25b are brought into contact with the electrodes on both sides of the varistor 5a, and the elastic contact pieces 21 of the electrode plate 20b are brought into contact with the electrodes on both sides of the varistor 5a.
is brought into contact with the electrode 8 of the lightning arrester 4. Also lightning arrester 4
There is also an electrode plate 20c and a contact plate 2 between the electrode plate 20d and the electrode plate 20d.
5c, insert the varistor 5b and the contact plate 25d, bring the elastic contact pieces 21 of the electrode plate 20c into contact with the electrode 9 of the lightning arrester 4, and bring the elastic contact pieces 28 of the contact plates 25c and 25d into contact with the electrodes on both sides of the varistor 5b. ,
Further, an auxiliary contact plate 30b is attached to the electrode plate 20d. After that, the presser plates 31a, 3 at both ends are
By tightening the set screws 33a, 33b of 1b, the lightning arrester 4, varistors 5a, 5b, electrode plates 20a, 20b, 20c, 20d, and contact plate 25 are housed in a row between the holding plates 31a, 31b.
a, 25b, 25c, 25d and auxiliary contact plate 30
The parts a and 30b are brought into close contact with each other.

In addition, in order to improve contact, set screws 33 on both ends
It is desirable that the centers of a, 33b and the parts disposed between them, especially the contact portions, be aligned on the same line. For this reason, the auxiliary contact plates 30a and 30b are used to ensure that the ends of the setscrews 33a and 33b abut on predetermined positions to obtain a sufficient tightening effect, and the contact plates 30a and 30b are
5a, 25b, 25c, 25d as electrode plate 20a,
The positioning is performed by being engaged with the engagement pieces 22 of 20b, 20c, and 20d. However, the auxiliary contact plate 30a,
30b is not necessarily necessary, and the contact plate 2
5a, 25b, 25c, 25d are also electrode plates 20a,
Instead of being locked to 20b, 20c, and 20d, the shape itself or the shape of the recess 12 may be changed to simply bring them into contact.

In the protector of the present invention, the components accommodated in the recess 12 of the insulating base 10 are appropriately adjusted according to its circuit configuration. When configuring the circuit shown in FIG. 13B, the varistor 5c with a lead wire is used, and the varistor 5c is housed in the recess 10a on the back side of the insulating base 10, and the lead wire is connected to the connecting terminals 1, 1'. Connect by soldering to the soldering terminal 52 of. And insulation base 1
In the recess 12 above 0, a plate-shaped conductive plate having the same thickness may be inserted in place of the varistors 5a and 5b if the configuration is almost the same as that of the above embodiment.
Alternatively, the contact plates 25a, 25b, 2 of the above embodiment
It is also possible to have basically the same structure as 5c and 25d and use elastic contact plates on both sides. In short, the contact plate 25
Since a, 25b, 25c, and 25d are located within the recess 12 and function as conductive spacers, they may be selected to have an appropriate thickness depending on the length of the recess 12. If the insulating base 10 is to have versatility even if the circuit configuration is slightly changed in this way, adjustment can be made by changing the thickness of the contact plate or by making the presser plate into a shape and protruding its vertical part into the recess 12. I can do it. It goes without saying that the insulating base 10 may be prepared with the shape and dimensions of the recess 12 matching the circuit configuration.

Furthermore, when the protector of the present invention is constructed as shown in FIG. 13c, the connection terminals 2, 2'
(this can be a lug terminal instead of a screw terminal), a varistor 5d and a current limiting resistor 6, 6.
are arranged in the recess 10a on the back side of the insulating base 10, and the lead wires of these elements are connected to predetermined connection terminals. The interior of the recess 12 of the insulating base 10 is constructed in the same manner as in the second embodiment.

The recess 10a on the back side of the insulating base 10 is filled with an insulating synthetic resin material in order to insulate terminals of different polarities or the elements housed therein, and to protect and ensure electrical connection. Good too.

Note that the recess 12 of the insulating base 10 is desirably made to such an extent that at least the upper part of the accommodated component appears above the recess 12 in order to facilitate attachment and detachment of the component accommodated therein.

As mentioned above, in the protector of the present invention, components such as the overvoltage protector, terminal board, and contact board are sequentially inserted into the recess on the insulating base and housed in a line, and the setscrews are tightened from both sides. Since the parts are attached and mounted, each part can be mounted very easily. In particular, if the recess is made shallow, each part will be exposed above the recess and your fingers can be hung on it.
Easy to attach and detach.

In addition, since the protector of the present invention has elasticity by forming elastic contact pieces on the terminal board and contact plate, the whole can be easily and securely contacted by simply tightening the setscrews from both sides, and the parts between each part can be easily and securely contacted. Electrical connectivity has improved.

Furthermore, the connecting terminal of the overvoltage protector is integrally formed with an enlarged part for locking into the recess on the back surface of the insulating base and a soldering terminal, and the lower end of the vertical part of the shaped connecting plate and the connecting terminal are integrally formed. Soldering terminals are connected to one end of the lead wire by soldering, so even if the connection terminal is broken during use due to minute cracks in the fragile part that occurs during press work or other process, the connection plate will not be damaged. Since the lower end of the vertical part of the overvoltage protector and one end of the lead wire are soldered, the electrical connection of the overvoltage protector is still maintained, which has the effect of increasing the reliability of the electronic device.

[Brief explanation of the drawing]

Figure 1 is a plan view of the protector, Figure 2 is a front view, Figure 3 is a bottom view, Figure 4 is a front view with some of the main parts cut away, and Figure 5 is an insulating base. Partial plan view, Figure 6 is also a partial vertical front view, Figure 7
The figure is a bottom view of the lid, Figures 8A and B are front and side views of the lightning arrester, respectively, Figure 9 is a perspective view of the varistor, Figures 9A and B are front and side views of the varistor,
Figures 10A and B are front and side views of the terminal board, Figures 11A and B are perspective views and sectional views of the contact plate, Figure 12 is a sectional view of the auxiliary contact plate, and Figures 13A and B. , C is a circuit diagram of the protector. 1, 1', 2, 2', 3... Connection terminal, 4... Overvoltage protector (surge arrester), 5a, 5b, 5c, 5d
... Overvoltage protector (varistor), 10 ... Insulation base, 12 ... Recess, 20a, 20b, 20c,
20d... Electrode plate, 21... Elastic contact piece, 25
a, 25b, 25c, 25d... contact plate, 28...
...Elastic contact piece, 31a, 31b...Press plate, 33
a, 33b...Set screw.

Claims (1)

[Scope of utility model registration request] A recess is formed on the inside of the insulating base that protrudes from the center of the upper part of the insulating base that is equipped with the connection terminal.The recess inside the protrusion has cutouts for relief of set screws on both sides. The protector, the terminal plate, the contact plate, and the holding plate arranged on both sides of the overvoltage protector are housed in a line, and by tightening the setscrews of the holding plate, these members are brought into close contact with each other. At the same time, a lid body is disposed on the convex part to close the recess, and the horizontal part of the shaped connecting plate is tightened with a nut at the base of the connecting terminal, and the vertical part of the shaped connecting plate is attached to the insulating base. A protective device characterized in that a connecting plate and a connecting terminal are connected to each other via a lead wire.