JPS6314361Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an auxiliary switch device for an electromagnetic contactor.

Conventionally, a magnet was installed in the movable frame of the electromagnetic contactor body,
There was one in which a pair of reed switches were installed on the side to operate the switch between normally open and normally closed (for example, Utility Model Publication No. 49-17975).

However, this electromagnetic contactor auxiliary switch device has a drawback in that two reed switches are required when either normally open operation or normally closed operation is required.

Therefore, an object of this invention is to provide an auxiliary switch device for an electromagnetic contactor that can easily handle both normally open and normally closed operations using a single reed switch.

A first embodiment of this invention is shown in FIGS. 1 to 7. That is, 1 is the electromagnetic contactor main body, 2 is the fixed core, 3 is the bobbin, 3a is the electromagnetic coil, 4
is a movable iron core, 5 is a movable frame, 6 is a C-shaped return spring,
7 is a movable main contact, 8 is a fixed main contact, 9 is a main contact terminal, and 10 is a coil terminal. When an exciting current is applied to the electromagnetic coil 3a through the coil terminal 10, it attracts the movable iron core 4 and causes a return spring. 6 is bent, the movable frame 5 is pulled down, whereby the movable main contact 7 contacts or separates from the fixed main contact 8. On the other hand, when the excitation current is cut off, the return spring 6 pushes up the movable iron core 4 and returns the movable frame 5 and the movable main contact 7.

This electromagnetic contactor body 1 has a hole 11 in its top portion 1a.
A T-shaped connecting portion 12 at the upper end of the movable frame 5
stands out.

Now, the auxiliary switch body 13 is attached to the top part 1a of the electromagnetic contactor body 1, has a guide part 14 near one side of the central part (Fig. 5), and has auxiliary terminals 15, 16 at both ends. It has a guide part 1 in the center.
A reed switch 17 is horizontally disposed adjacent to 4 and slightly below the center height, and its lead wire 18 is connected to both terminals 15 and 16. Auxiliary movable frame 1
9 has connected parts 20 and 21 that fit into the T-shaped connecting part 12 of the movable frame 5 at both upper and lower ends of the movable frame 5, and a permanent magnet 22 is integrated at a predetermined position slightly closer to one end of the central part. It is set up.

Figures 4 and 5 show the normally closed auxiliary switch 13.
It is a. In this case, the auxiliary movable frame 19 is inserted into the guide part 14 so that the permanent magnet 22 of the auxiliary movable frame 19 is on the lower side, and the lower connected part 20
The T-shaped connecting portion 12 of the movable frame 5 of the contactor body 1
Fit and connect from the side. In this state,
As shown in the figure, a permanent magnet 22 is located right next to the reed switch 17, and the reed switch 17 is turned on (closed) under the influence of magnetic force. When the movable frame 5 is lowered by energizing the excitation coil 3a, the auxiliary movable frame 19 simultaneously slides downward. Therefore, the influence of the magnetic force when the permanent magnet 22 is separated from the reed switch 17 is eliminated, and the reed switch 17 is turned off. That is, the magnitude of the magnetic force of the permanent magnet 22 is determined in relation to the stroke amount of the movable frame 5.

Figures 6 and 7 show the normally open type auxiliary switch 13.
It is b. That is, the auxiliary movable frame 19 is turned upside down so that the permanent magnet 22 is located on the upper side, and inserted into the guide part 14, and the T-shaped connecting part 12 of the movable frame 5 and the lower side are inserted in the same way as above. and the connected portion 21 located at . In this state, as shown in the figure, since the permanent magnet 22 is separated from the reed switch 17, the reed switch 17 is not affected by magnetic force, and the reed switch 17 is off. The electromagnetic contactor operates and the movable frame 5 lowers, and the auxiliary movable frame 19
When the reed switch 17 falls, the permanent magnet 22 approaches the reed switch 17, and the switch 17 is then turned on.

With this structure, when the terminals 15 and 16 of the auxiliary switch main body 13 are connected to a micropower circuit, the reed switch 17 is turned on or off simultaneously with the operation of the electromagnetic contactor, so that the circuit is reliably opened and closed.

A second embodiment of this invention is shown in Figures 8 to 11.
As shown in the figure. The auxiliary movable frame 19' of the auxiliary switch main body 13' is made into a U-shape, with connected parts 20' and 21' formed at both upper and lower ends, and a permanent magnet 22' attached to the inner bottom of the U-shape. ing. On the other hand, the reed switch 17' has a guide portion 1 formed in the center.
It is installed horizontally at approximately the center height of 4'. The normally closed type has an auxiliary movable frame 19' as shown in Figures 8 and 9.
This is a case where the auxiliary movable frame 19' is inserted into the guide part 14' in a U-shaped position, and the normally open type is inserted into the guide part 14' with the auxiliary movable frame 19' in an inverted U-shaped position as shown in Figures 10 and 11. This is the case. Each operation is similar to the first embodiment.

As described above, the auxiliary switch device for an electromagnetic contactor of this invention includes an electromagnetic contactor main body that has an electromagnetic coil and is provided with a connecting part on the exposed part of the movable frame that operates by energizing the electromagnetic coil, and the connecting part. an auxiliary movable frame having a connected part at both ends that removably engages with the part, and a permanent magnet provided at a position near one of the connected parts; The guide part is reversible and slidably held in the same direction as the operating direction of the movable frame, and the connected part of the auxiliary movable frame on the side near the permanent magnet is connected to the connecting part. The permanent magnet approaches by operating the movable frame in a state where the connected part of the auxiliary movable frame on the side where the permanent magnet approaches and is far from the permanent magnet engages with the connecting part. Since the auxiliary switch main body is provided with a reed switch at the position, the following effects are achieved.

That is, the auxiliary movable frame is reversibly and slidably disposed on the guide portion of the auxiliary switch main body, and a permanent magnet is placed offset on the side closer to one of the connecting portions of the auxiliary movable frame to approach the reed switch. By reversing the auxiliary movable frame, it is brought close to the reed switch when the movable frame is in operation, and it is made normally open. Therefore, one reed switch can easily handle both normally open and normally closed operations. I can comply.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of the electromagnetic contactor of the first embodiment of this invention, Fig. 2 is a perspective view of the auxiliary switch, and Fig.
The figure is a perspective view of the T-shaped connecting part, FIG. 4 is a sectional view of the normally closed auxiliary switch, FIG. 5 is a sectional view taken along the line - 6, FIG.
8 is a sectional view of the normally closed auxiliary switch of the second embodiment, FIG. 9 is a sectional view of the normally open auxiliary switch, and FIG. 10 is a sectional view of the normally open auxiliary switch. FIG. 11 is a sectional view taken along the line XI-XI. 1...Magnetic contactor body, 3a...Magnetic coil,
5...Movable frame, 12...Connection part, 13, 13'...
...Auxiliary switch, 14, 14'...Guide part, 1
7, 17'... Reed switch, 19, 19'...
Auxiliary movable frame, 20, 20', 21, 21'... connected portion, 22... permanent magnet.

Claims (1)

[Scope of utility model registration request] an electromagnetic contactor main body having an electromagnetic coil and a coupling part provided on an exposed part of a movable frame that is operated by energizing the electromagnetic coil; having a coupled part at both ends that detachably engages with the coupling part; an auxiliary movable frame provided with a permanent magnet at a position close to one of the connected parts; and an auxiliary movable frame provided on the electromagnetic contactor body so that the auxiliary movable frame can be reversed and freely slid in the same direction as the operating direction of the movable frame. The auxiliary movable frame has a guide portion that holds the permanent magnet at a position where the permanent magnet approaches with the connected portion of the auxiliary movable frame closer to the permanent magnet connected to the connecting portion, and An auxiliary switch main body having a reed switch at a position where the permanent magnet approaches when the movable frame operates with the connected part on the side far from the permanent magnet engaged with the connecting part. Auxiliary switch device.