JPS642349Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a switch with a latch mechanism.

Figure 1 is a side sectional view showing a conventional vacuum switch with a latch mechanism, Figure 2a is a plan view showing details of the latch mechanism in Figure 1, Figure 2b is a side view of Figure 2a, and Figure 2b is a side view of Figure 2a. FIG. 3 is a control circuit diagram of FIG. 1. In Fig. 1 and Fig. 2 a and b, 1 is a mold frame;
2 is an upper terminal fixed to mold frame 1;
3 is a vacuum switch tube fixed to the upper terminal 2, 4
is a shunt connected to the movable rod of the vacuum switch tube 3, 5 is a lower terminal connected to the shunt 4 and fixed to the mold frame 1, 6 is an insulating rod connected to the movable rod of the vacuum switch tube 3, and 7 is a rotating rod. The shaft connects a lever 8, which will be described later, and a movable core 9, which will be described later. 8 is a lever whose one end is fixed to the rotating shaft 7 and drives the insulating rod 6; 9 is a movable core whose one end is fixed to the rotating shaft 7 and connected to the lever 8; 10 is a lever that drives the other end of the lever 8 in a downward direction. 11 is a frame fixed to mold frame 1; 12 is an electromagnet fixed to frame 11; 13 is frame 11;
14 is a stopper that determines the open position of the movable core 9; 15 is a frame of the latch mechanism; 16 is a latch mechanism fixed to the movable core 9;
is a latch lever that rotates around a first rod pin 17, which will be described later. Reference numeral 17 designates a first rod pin inserted through both side arms 15a, 15b of the frame 15 and both side arms 16a, 16b of the latch lever 16, and 18 represents a second rod pin, in which a needle bearing 19 (described later) is incorporated, and the latch lever 16
It is inserted between both arms 16a and 16b of. 19 is a needle bearing incorporated in the second rod pin 18, 20 is a torsion spring that applies rotational force to the latch lever 16, and 21 is a frame 15.
This is a guide fixed to and guides the movement of the trip lever 22, which will be described later. Reference numeral 22 denotes a trip lever, one end of which is inserted into a hole in the guide 21, and the other end is inserted into a hole in the frame 15 to rotate about a fulcrum 26, which will be described later. 23 is a fixed core fixed to the frame 1, 24 is a tripping coil wound around the fixed core 23, 25 is a compression coil spring that applies rotational force to the trip lever 22, and 26 is a fulcrum of the trip lever 22.

In Fig. 3, 30 is a control relay coil;
31 is a closing coil, 32 is a tripping coil, 33
a and 33b are control switch contacts that give "on" and "off" signals, and 30a is a control relay 30
34a is a make contact of the auxiliary switch of the switch, and 34b is a break contact of the auxiliary switch of the switch.

Next, the operation will be explained. In Figure 1,
When a current is passed through the coil of the electromagnet 12, the movable core 9 is attracted by the electromagnetic force. Due to the suction of the movable core 9, the rotating shaft 7 rotates counterclockwise, and the lever 8 fixed to the rotating shaft 7 lifts the insulating rod 6 against the spring force of the opening spring 10, thereby opening the vacuum switch tube 3. The contact becomes closed. At this time, the latch mechanism 13 locks the movable core 9 and can maintain the closed state even if the current in the coil of the electromagnet 12 is cut off. When the latch mechanism 13 is then unlocked, the release spring 10 rotates the lever 8 clockwise and the movable core 9 moves to a position where it abuts the stopper 14. This action pulls the insulating rod 6 downward, and the contacts of the vacuum switch tube 3 become open.

Next, the control circuit shown in FIG. 3 will be explained. When the control switch 33a is closed,
Control relay 30 operates, and make contact 30a of control relay 30 closes. When the make contact 30a is closed, a current flows through the closing coil 31, the movable core 9 is attracted by the electromagnet 12, and the contact of the vacuum switch tube 3 is closed. Further, the latch mechanism 13 locks the movable core 9 at the same time as the movable core 9 is attracted, and the switch maintains the closed state. On the other hand, looking at the electrical operation of the control circuit, the break contact 34b of the auxiliary switch opens due to the closing operation of the switch.
Make contact 34a is closed. By opening the break contact 34b of this auxiliary switch, the control relay 30
The current is cut off, and the make contact 3 of the control relay 30
0a is open. Make contact 3 of control relay 30
When 0a is opened, the current in the closing coil 31 is cut off, and the closing operation is completed by opening the control switch 33a.

Next, by closing the control switch 33b, a current flows through the tripping coil 32, unlocking the latch mechanism 13 and the movable core 9, and opening the switch. Since the make contact 34a of the auxiliary switch when the switch is open opens, the tripping coil 3
The current flowing through 2 is cut off. This completes the series of opening and closing operations. The purpose of the control relay 30 is to temporally delay the current flowing through the closing coil 31 and to completely lock the latch mechanism 13.

Next, the operation of the latch mechanism 13 will be explained.
2a and 2b show details of the latch mechanism, showing the locked state of the latch lever 16 and the movable core 9. FIG.
Both arms 16a and 16b at the tip of the latch lever 16
A second rod pin 18 is passed between them, and a needle bearing 19 is inserted and assembled into the second rod pin 18, so that the needle bearing 19 locks the movable core 9. The latch lever 16 also includes both arms 15a of the frame 15,
15b, and both arms 16a, 1 of the latch lever 16.
6b, and rotates around the first rod pin 17 passing through it. The latch lever 16 has a twist spring 20
A counterclockwise rotational force is applied by the second rod pin 18 to the final stop position.
This is the position where it hits the stopper part 15c provided on the side arm 15b. This position becomes the lock position for the movable core 9. On the other hand, the frame 15 includes a guide 21, a trip lever 22, a fixed core 23,
A tripping mechanism composed of a tripping coil 24 and a compression spring 25 is attached, and the tripping coil 24
By passing a current through, the trip lever 22 is attracted to the fixed core 23 against the spring force of the compression spring 25, and rotates counterclockwise about the fulcrum 26 of the trip lever 22. This action causes the tip of the trip lever 22 to strike the second rod pin 18, causing the latch lever 16 to rotate clockwise as shown by arrow A. By the operation of this latch lever 16, the movable core 9 and the needle bearing 19
is released, the lock is released, the latch lever 16 rotates clockwise, and the movable core 9 also rotates around the rotating shaft 7.
It rotates clockwise around , and moves to the position where it touches the stopper 14. This position is the open position of the switch.

In addition, at this time, the latch lever 16 is
The upper surface of the movable core 9 is pressed down by the bottom surface 9a of the movable core 9. Next, when the movable core 9 is attracted and moves, the latch lever 16 also follows in the counterclockwise direction by the torsion spring 20, and when the movable core 9 is completely attracted, the second rod pin 18 is moved to the stopper 15c of the frame. Move to the position where it hits. This position is the coupling position of the latch mechanism 13 and the movable core 9.

The conventional latch mechanism is constructed as described above, and in order to obtain a complete lock of the latch mechanism,
A control relay is used. The disadvantage of installing this control relay was that it required a large amount of space. Further, due to the complexity of the control circuit, the number of man-hours for wiring, etc. increases, and the control relays are expensive.

This idea was made in order to eliminate the drawbacks of the conventional ones as mentioned above, and by providing a limit switch, the control relay was omitted, making it more compact, and the control circuit was simplified. The purpose is to provide equipment.

An embodiment of this invention will be described below with reference to the drawings. FIG. 4a is a plan view showing one embodiment of the latch mechanism of the switch with a latch mechanism according to this invention;
Figure b is a side view of Figure 4 a, Figure 5 is Figure 4 a and b.
FIG. 3 is a control circuit diagram of the latch mechanism of FIG. Figure 4 a, b
In the figure, 27 is a limit switch mounting plate which also serves as the conventional guide 21, 28 is a limit switch fixed to the mounting plate 27, and 29 is a lever that operates the contact of the limit switch 28. In FIG. 5, 35 is a break contact of the limit switch 28.

Next, the operation of the latch mechanism according to this invention will be explained. In FIGS. 4a and 4b, latch part 1
The configurations of trip mechanisms 5, 16, 17, 18, 19, and 20 and trip mechanism sections 22, 23, 24, 25, and 26 are the same as those of the prior art. The second rod pin 18 is longer than the conventional product, and the lever 2 of the limit switch 28
The length corresponds to 9. Further, the limit switch mounting plate 27 is bent at a right angle into an L-shape, and has a structure that also serves as the guide 21 of the conventional product. Note that FIGS. 4a and 4b show the latch lever 16 as in FIGS. 2a and 2b.
The locked state between the movable core 9 and the movable core 9 is shown. In this state, the second rod pin 18 is connected to the limit switch 2.
Kick up the lever 29 of 8 and press the limit switch 2.
8 is in operation. When the latch lever 16 is unlocked and the latch lever 16 rotates clockwise, the lever 2 of the limit switch 28 is
9 is restored, and the operation of the limit switch 28 is released.

Next, the control circuit shown in FIG. 5 will be explained. By closing the control switch 33a, current flows through the closing coil 31, and the movable core 9 is attracted. During this process, the latch lever 16 is attached to the movable core 9.
The second rod pin 18 moves to a position where it contacts the stopper portion 15c of the frame 15. This second
The rod pin 18 is the stopper part 15 of the frame 15.
Immediately before hitting point c, the lever 29 of the limit switch 28 is pushed up, and the limit switch 28 is activated. This operation of the limit switch 28 opens the break contact 35 of the limit switch 28, and the current flowing through the closing coil 31 is cut off, thereby completing the closing operation. At this time, the make contact 34a of the auxiliary switch of the switch is closed.

Next, by closing the control switch 33b, a current flows through the trip coil 32, the trip lever 22 is attracted around the fulcrum 26, the tip of the trip lever 22 hits the second rod pin 18 downward, and the movable core 9 and the latch lever 16. This operation causes the latch lever 16 to rotate clockwise, the lever 29 of the limit switch 28 to return, the operation of the limit switch 28 is released, and its break contact 35 is closed.
In this case, the limit switch 28 operates by capturing the locked state of the latch lever 16, so that stability in locking the latch lever 16 can be obtained as in the case where the control relay 30 is used as in the prior art.

In the above embodiment, the conventional guide 21 is integrated with the limit switch mounting plate 27, but the frame 15 and the limit switch mounting plate 2
7 may be integrated, or a separate limit switch mounting plate may be fixed to the frame 15 to achieve the same effect.

As described above, according to this invention, by providing a limit switch and omitting the control relay, the entire switch can be made smaller, the control circuit becomes simpler, and the switch as a whole becomes less expensive. It has various effects such as being able to

[Brief explanation of the drawing]

Fig. 1 is a side sectional view showing a conventional switch with a latch mechanism, Fig. 2a is a plan view showing details of the latch mechanism in Fig. 1, Fig. 2b is a side view of Fig. 2a, and Fig. 3 4A is a plan view showing an embodiment of the latch mechanism of a switch with a latch mechanism according to the present invention; FIG. 5
The figure is a control circuit diagram of the latch mechanism of FIGS. 4a and 4b. In the figure, 1 is a mold frame, 2 is an upper terminal, 3 is a vacuum switch tube, 4 is a shunt, 5 is a lower terminal, 6 is an insulating rod, 7 is a rotating shaft, 8 is a lever, 9 is a movable core, and 10 is an open Spring, 11 frame, 12 electromagnet, 13 latch mechanism, 14
is a stopper, 15 is a frame, 16 is a latch lever, 17 is a first rod pin, 18 is a second rod pin, 19 is a needle bearing, 20 is a torsion spring, 21 is a guide, 22 is a trip lever, 23
is a fixed core, 24 is a trip coil, 25 is a compression spring, 26 is a fulcrum of the trip lever, 27 is a limit switch mounting plate, 28 is a limit switch,
29 is the lever of the limit switch, 30 is the control relay, 30a, 30b are the make and break contacts of the control relay, 31 is the closing coil, 32 is the tripping coil, 33a, 33b are the contacts of the control switch, 34a is the auxiliary make of the switch Contact, 34b
is the auxiliary break contact of the switch, and 35 is the break contact of the limit switch. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Claims for Utility Model Registration] 1. Connected to a contact of a switch and closing said contact;
An opening/closing mechanism for opening the opening/closing mechanism, a closing electromagnet disposed opposite to a predetermined portion of the opening/closing mechanism and sucking the prescribed portion during operation to drive the opening/closing mechanism in a closing direction, and a closing electromagnet provided to cooperate with the opening/closing mechanism. and a latch mechanism that holds the opening/closing mechanism in the closed state, and a lever that can be engaged with the latch mechanism, and when operated, drives the latch mechanism via the lever to release the held state. comprising a trip device and a limit switch having an operating lever adapted to be interlocked with the latch mechanism during the closing operation of the opening/closing mechanism;
The limit switch operates when the operating lever moves to a position where the latch mechanism holds the opening/closing mechanism in the closing state, and the energizing circuit of the closing electromagnet is cut off. Switch with switch. 2. The switch with a latch mechanism according to claim 1, which is a utility model, and is characterized in that a latch mechanism, a trip device, and a limit switch are mounted on the same frame.