JP2869602B2 - Low pressure switch - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a low-voltage switch used in a low-voltage distribution line. 2. Description of the Related Art Generally, 100 V and 200 V distribution lines are imaginary and are directly drawn into customers on the roof side. [0003] On the other hand, in the vicinity of a station or in a downtown area of a large city, it is necessary to promote underground without telephone poles and overhead lines due to the demand for aesthetics of the city. This underground has already been implemented in some places, and has been well received as a marked improvement in urban aesthetics. ◎ However, when undergrounding the distribution line, compared to the case of overhead wiring, wiring replacement and accident recovery requires a lot of time and labor,
Power outages tend to be longer. In the low-voltage wiring system, a branch device for wiring to a plurality of customers is usually provided on the secondary side (low-voltage side) of the power transformer, and these branch devices are connected to each other. Even if one power supply transformer fails and a power outage occurs, it is wired so that power can be supplied from another branch device. [0005] However, if the branching devices are always in a linked state, the power failure range of the accident is widened. Therefore, the linking devices are normally connected only within a certain section, and the other linked devices are set in the open state. Have been. [0006] Such a connecting device is a low-voltage switch used for the above purpose, and in order to advance underground, it is necessary to develop a low-voltage switch for easily and quickly opening and closing an underground low-voltage line. . SUMMARY OF THE INVENTION [0007] The present invention has been made in view of the above points, and has an excellent waterproof property, and is capable of easily and quickly opening and closing an underground low-voltage line. The purpose is to get a bowl. [0008] The low-pressure switch of the present invention comprises:
In the insertion hole portion formed so as to penetrate from the inside of the base of the switch body made of an insulating material toward the front end portion, two fixed contacts each having a through hole are provided with the axes of the insertion hole and the through hole. A pair of electrodes, which are disposed so as to coincide with each other and have a handle at the distal end between the through holes of these fixed contacts and are electrically connected internally to the outer peripheral surface of the central portion, are provided. is characterized in that cylindrical or cylindrical insulating sliding contact of provided at the same interval as is inserted into watertight capable and allowed slide. In the low-voltage switch of the present invention, opening and closing of the underground wire connected to the fixed contact can be easily and reliably performed by operating the handle provided at the tip of the sliding contact. Can be done. Embodiments of the present invention will be described below in detail with reference to the drawings. In FIG. 1, a switch body 1 made of a cylindrical insulating material made of rubber, epoxy resin or the like has a vacant space 2 at its base and a leading end connected to the vacant space 2 at its own end. The insertion hole 3 penetrating toward is formed. The insertion hole 3 in the switch body 1
As shown in FIG. 2, the two fixed contacts 6 and 7 are inserted into the portion by aligning the axes of the through holes 4 and 5 formed in the base thereof with the axis of the insertion hole 3. The holes 3 are spaced apart along the length direction. As shown in FIG. 5, shallow annular concave grooves 4a are formed in the inner peripheral surfaces of the through holes 4 and 5 of the two fixed contacts 6 and 7, respectively. As shown in FIG. 6, a conductive tape-like connector 4b called a so-called multi-lam band (manufactured by Multi Contact) is fitted in the groove 4a in a ring shape along the inner wall of the concave groove 4a. A C-shaped spring 4e, whose both edges are each groove 4
a is fixed to the inner wall. Conductive tape connector 4
b, a large number of slits 4c are formed in the tape-like connector 4b in parallel with the width direction to form a large number of bridge pieces 4d connecting both edges, and these bridge pieces 4d are screwed around their longitudinal center lines. The tape-shaped connector 4b itself is provided with elasticity in the thickness direction. These fixed contacts 6 and 7 are embedded and fixed in the switch body 1 as shown in the figure when the switch body 1 is molded. Each of the fixed contacts 6 and 7 is provided with a blade-shaped terminal 8 or 9 or a cylindrical terminal (not shown) having a conductor insertion hole, and these terminals 8 and 9 are made of an insulating material. And is exposed outside the switch body 1. The exposed terminals 8 and 9 are connected to distribution lines 10, for example, as shown in FIG. Reference numeral 11 denotes a cylindrical or cylindrical insulating sliding contact slidably inserted between the through holes 4 and 5 of the two fixed contacts 6 and 7. Moving contact 11
As shown in FIG. 3, a pair of electrodes 12 and 13 are provided on the outer peripheral surface at the central portion at the same interval as the interval between the two fixed contacts 6 and 7. The two fixed contacts 6, 7 and the electrodes 12, 13 of the sliding contact 11, as shown in FIG. When inserted into the fixed contacts 6 and 7, the conductive tape-shaped connectors 4 b disposed on the inner peripheral surfaces of the through holes 4 and 5 of the fixed contacts 6 and 7 are inserted into the sliding contacts 1 and 5.
The first and second electrodes 12 and 13 resiliently come into contact with each other, whereby the electrical and mechanical contact between the two electrodes is constantly maintained. The pair of electrodes 12 and 13 are electrically connected, for example, by lead wires 14 and 15 provided inside the sliding contact 11. Reference numeral 16 denotes a spring disposed between the base of the sliding contact 11 and the bottom 17 of the empty chamber 2. The spring 16 is pressed by the sliding contact 11 toward the base. , A repulsive force toward the tip is urged. Reference numeral 18 denotes a stopper whose base end is fixed to the side wall of the vacant chamber 2.
It is in contact with the upper surface of the large diameter portion 19 formed at the base of the sliding contact 11. This stopper 18 is, as described later,
It has a function as locking means. That is, when the sliding connector 11 is pushed down to the base side, the stopper 18 is passed through the guide groove 20 formed in the large diameter portion 19 of the sliding contact 11, and the stopper 18 Diameter 19
Is reached, the sliding contact 11 is rotated, and the stopper 18 is housed in the recess 21 formed on the upper surface of the large diameter portion 19. Next, a method for electrically closing and opening the two terminals 8 and 9 will be described. That is, as shown in FIG.
Rotate so that 0 reaches the position where the stopper 18 exists. Then, since the lock of the stopper 18 is released, the two electrodes 12 and 13 move toward the fixed contacts 6 and 7, and the outer peripheral surface of each of the electrodes 12 and 13 and the penetration of each fixed contact 6 and 7. The inner peripheral surfaces of the holes 4 and 5 come into contact with each other, and are electrically closed. Also, as shown in FIG.
As shown in FIG. 1, if the electrode 1 is pushed down and locked, the electrodes 12, 13 are separated from the fixed contacts, and the circuit is in an open state. In the above-described embodiment, a case is described in which an electrode is formed on the outer peripheral surface of a round rod such as a single insulating rod as a sliding contact. However, the present invention is not limited to this. One in which two conductor bars and two insulation bars are connected alternately may be used. In the drawing, reference numeral 22 denotes a waterproof cover for keeping the inside of the insertion hole 3 of the switch body 1 watertight, and 23 denotes a conductor 24 of one distribution line 10 and a terminal 8 of one fixed contact 6. An insulating cap for covering the connection portion of 25
Indicates a handle fixed to the upper part of the sliding contact 11. In the low-voltage switch having the above configuration, the fixed contacts 6 and 7 are moved by sliding the sliding contact 11 in the axial direction.
They can be electrically closed or open. Further, if the low-voltage switch according to the present invention is installed in the ground with the handle 26 of the sliding contact 11 facing upward, opening and closing between the underground wires 10 connected to the fixed contacts 6 and 7 can be performed. It can be performed easily and reliably even from the ground. As described above, according to the present invention,
By operating the handle provided at the tip of the sliding contact, it is possible to electrically close or open the underground line connected to each fixed contact. In addition, when the low-voltage switch is installed underground with the handle of the sliding contact facing upward, the underground line can be easily and reliably opened and closed even from the ground. Connection On, Of
An opening / closing device suitable for f switching can be provided.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal sectional view showing one embodiment of a low-voltage switch of the present invention. FIG. 2 is a perspective view of a fixed contact disposed in an insertion hole portion of the low-voltage switch of the present invention. FIG. 3 is a partially omitted perspective view of a sliding contact inserted between fixed contacts of the low-voltage switch of the present invention. FIG. 4 is an explanatory diagram showing an electrical connection state between fixed contacts of the low-voltage switch of the present invention. FIG. 5 is an explanatory diagram showing an electrical connection state between a sliding contact and a fixed contact of the low-voltage switch of the present invention. FIG. 6 is a perspective view showing a tape-shaped connector disposed in a through hole of a fixed contact of the low-voltage switch of the present invention. [Description of Signs] 1 Switch body 2… Empty room 3… Insert holes 4, 5… Through holes 6, 7… Fixed contacts 8, 9 ... Terminal 10 ... Distribution line 11 ... Sliding contacts 12, 13 ... Electrode

   ────────────────────────────────────────────────── ─── Continuation of front page       (56) References JP-A-58-209077 (JP, A)                 JP-A-56-35319 (JP, A)                 Actual opening 50-146071 (JP, U)                 Shoko 51-22248 (JP, Y1)

Claims (1)

(57) [Claims] In the insertion hole portion formed so as to penetrate from the inside of the base of the switch body made of an insulating material toward the front end portion, two fixed contacts each having a through hole are provided with the axes of the insertion hole and the through hole. A pair of electrodes, which are disposed so as to coincide with each other and have a handle at the distal end between the through holes of these fixed contacts and are electrically connected internally to the outer peripheral surface of the central portion, are provided. low pressure switch, characterized in that <br/> cylindrical or cylindrical insulating sliding contact of provided at the same interval as is inserted into watertight capable and allowed slide .