JPH0256820A - Contact switching device - Google Patents

Abstract

PURPOSE:To aim at stabilization of a switching operation by switchingly setting an electromagnet device either in an excited state or in an unexcited state by means of a remote control unit, and switchingly setting a permanent magnet by means of a on-hand control unit. CONSTITUTION:An electromagnet device 12 exerts a magnetizing force on the contacts 17 of a contact device 11. A remote control unit 13 connects or disconnects the electromagnet device 12 with or from a power source 19 so as to switchingly set it either in an excited state or in an unexcited state. A permanent magnet 14 can move from a position where the magnetizing force is applied to the contacts 17 to a position where it is not applied, and vice versa. A close control unit 15 switchingly sets the magnet 14. Switching of the electromagnet device 12 by means of the remote control unit 13 enables switching by remote control. Switching of the permanent magnet 14 by means of the close control unit 15 also enables the contacts 17 to be switched by close control. Therefore, a stable switching operation can be obtained by a switching operation by either of the remote control unit and the close control unit.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a contact switching device installed in a load circuit of a home appliance or the like.

[Prior Art] Conventionally, a contact opening/closing device in which the power supply circuit of a load can be opened and closed directly not only by a remote control unit but also by a hand control unit is disclosed in Japanese Patent Laid-Open No. 81-1511137. It is described in. This contact opening/closing device uses one of a pair of contacts installed in a load circuit as a movable contact and integrates this into a rocking body, and this rocking body can be rocked by either an electromagnetic device or a hand control unit. The contacts can be opened and closed by At this time, the electromagnet device is set to be switched between an energized state and a de-energized state by a remote control switch serving as a remote control unit to cause the oscillating body to oscillate, and a hand-held operating unit causes the oscillator to directly mechanically oscillate. □Ru.

Problem 1 to be Solved by the Invention However, the above conventional contact switching device has the following problems.

■Since the hand control unit directly mechanically moves the oscillating body, which is the contact itself, unreasonable force is likely to be applied to the contact. This makes it difficult to obtain stable opening/closing operation, and This means that the lifespan of the battery is likely to be shortened.

(2) The principle of opening/closing operation by the electromagnetic device and the principle of opening/closing operation by the one-hand operation unit are mutually independent, so switching any one of them will always reverse the current open/close state of the contacts. So-called post-priority functions cannot be obtained.

The present invention enables the opening and closing of load circuits to be performed not only by a remote control unit but also by a remote control unit.
When configuring the system so that it can also be performed using the hand-held operation unit,
The purpose is to stabilize the opening/closing operation without applying excessive force to the contacts, and to extend the life of the contacts.

A further object of the present invention is to ensure that the current open/closed state of the contacts can be reversed regardless of whether the remote control unit or the handheld control unit is switched.

[Means for Solving the Problems 1] A contact switching device of the present invention according to claim 1 includes: a contact device that is interposed in a load circuit and includes a pair of contacts that open and close according to changes in magnetizing force; an electromagnet device disposed near the contact device and capable of exerting a magnetizing force on the contacts of the contact device; a remote control unit configured to switch the electromagnet device between an energized state and a de-energized state; A permanent magnet that can be set to either an influence mode that can exert a magnetizing force on the contacts of the device or an uninfluenced mode that cannot exert a magnetizing force on the contacts, and a permanent magnet that can be switched to either the above-mentioned influence mode or uninfluenced mode. The device also includes a hand-held operation unit for setting the settings.

The present invention according to claim 2 is configured such that the direction of the lines of magnetic force formed around the contact by the electromagnet device and the direction of the line of magnetic force formed around the contact by the permanent magnet are opposite to each other. be.

[Function] According to the present invention as set forth in claim 1, (1) By switching and setting the electromagnet device between an energized state and a de-energized state using the remote control unit, a change in magnetizing force is applied to the contact, and as a result, This can be opened and closed by remote control. (11) By switching the permanent magnet between the influence mode and the non-influence mode using the hand control unit 11, a change in the magnetizing force is applied to the contact, and as a result, it can be opened and closed by the hand control.

Therefore, in the present invention as set forth in claim 1, although the hand operation section mechanically moves the permanent magnet, it does not apply mechanical operating force to the contact point. It opens and closes depending on the magnetizing force exerted on it.
Therefore, when configuring the load circuit so that it can be opened and closed not only by the remote control unit but also by the handheld control unit, it is possible to avoid applying force to the contacts. It is possible to stabilize the opening/closing operation and extend the life of the contacts.

According to the present invention as set forth in claim 2, the principle of opening and closing operation by the electromagnetic device and the principle of opening and closing operation by the permanent magnet are the same in that they apply a change in magnetizing force to the contact, and moreover, they are formed around the contact. The magnetization forces are configured so that the directions of the magnetizing forces are opposite to each other. Therefore, even if the state of the electromagnet device is changed using the remote control unit or the state of the permanent magnet is changed using the handheld control unit, in either case, the magnetizing force acting on the contact will be different from the current state, and it will not open. Contacts that were closed will close, and contacts that were closed will open (Table 1)
, see Table 2), that is, the current contact opening/closing state can always be reversed regardless of whether the remote control unit or the handheld control unit is switched, and a so-called backward priority function can be obtained.

[Example] FIG. 1 is a schematic diagram showing an embodiment of the present invention.

The contact opening/closing device IO includes a contact device 11 and an electromagnet device 12.
, a remote control unit 13 , a permanent magnet 14 and a hand control unit 1
5.

The contact device 11 is interposed in the load circuit 16 and includes a pair of contacts 17.17 that open and close according to changes in magnetizing force. The contact device 11 of this embodiment is a reed switch, and has lead-like contacts 17 and 17 built into a sealed container (glass tube) 18 filled with an inert gas. Note that the contact device 11 may have another configuration such as a mercury relay.

The electromagnetic device 12 consists of a coil and is arranged near the side of the contact device 11 and can exert a magnetizing force on the contacts 17.17 of the contact device 11. At this time, the electromagnet device 12
．． The direction of the magnetic lines of force formed around 17 is set as shown in the figure.

The remote control unit 13 is a manual or wireless remote control switch that connects or disconnects the power supply 19 to the coil of the electromagnetic device 12, and switches the coil between an energized state and a non-excited state.

The permanent magnet 14 is arranged near the side of the contact device 11,
The influence position (influence mode) where a magnetizing force can be exerted on the contact 17.17 of the contact device 1. mode) (see FIG. 1(A)). At this time, the magnetic poles of the permanent magnet 14 are set as shown in the figure, so that the electromagnetic device 12 described above directs the direction of the magnetic field lines formed by the permanent magnet 14 around the contact 17.17.
The direction is set to be opposite to the direction of the magnetic lines of force formed around 17.

The hand operating section 15 is composed of a cam, and the permanent magnet 14 is set to either the affected position or the non-influenced position. , 21 is a spring plunger that maintains the cam position of the hand-held operating portion 15 at either the affected position or the unaffected position.

Next, the operation of the above embodiment will be explained.

According to the above embodiment, (1) the remote control unit 13 switches the electromagnetic device 12 between the energized state and the de-energized state, thereby applying a change in the magnetizing force to the contacts 17.17;
As a result, it can be opened and closed by remote control. ■The contact 17 can also be set by switching the permanent magnet 14 to either the affected position or the uninfluenced position using the 1-hand operation unit 15.
．． 17 is given a change in magnetizing force, and as a result, it can be opened and closed by hand operation.

Here, the opening/closing operations of the contacts during remote operation are as shown in Table 1, and the opening/closing operations of the contacts during hand operation are as shown in Table 2.

In the above-mentioned embodiment, although the hand operation section 15 mechanically moves the permanent magnet 14, the contact point 17.
In other words, the contacts 17 and 17 are opened and closed by the magnetizing force exerted by the permanent magnet 14, and no unreasonable force is applied to them. Therefore, the load The remote control unit 13 opens and closes the circuit.
When configured so that it can be operated not only by the single-hand operation unit 15, it is possible to stabilize the opening/closing operation without applying excessive force to the contacts 17 and 17, and to extend the life of the contacts.

In addition, in the present invention, since the contact operating force based on the 1-hand operation part 15 does not directly mechanically reach the contact 17.17 as described above, the permanent magnet 14 on the side of the hand-operation part 15 and the contact 1
7.17 is made non-contact, and this contact 17.17 is housed in a sealed container 18 such as an inert gas filled tube or a vacuum tube as in the above embodiment, and the life of the contact can be greatly improved.

Further, according to the above embodiment, the principle of opening and closing operation by the electromagnet device [12 and the principle of opening and closing operation by the permanent magnet 14 are both the same in that they apply changes in the magnetizing force to the contacts 17 and 17; 17. The magnetic field lines formed around 17 are configured so that the directions are opposite to each other. Therefore, even if the state of the electromagnet device 12 is changed by the remote control unit 13, the permanent magnet 14 is not activated by the hand control unit 15.
In any case, even if the state of contact 17.1 is changed,
The magnetizing force acting on 7 becomes different from the current state, and the open contacts 17 and 17 close.

The contacts 17.17 that were closed will now open (see Tables 1 and 2), that is, the remote control unit 13 and the hand control unit 15 will open.
No matter which one of these is switched, the current open/closed state of the contacts can always be reversed, and a so-called backward priority function can be obtained.

FIGS. 2(A) to 2(C) are schematic diagrams showing modified examples of the present invention.

The contact switching device 20 in FIG. 2(A) is the contact switching device 1.
The difference from 0 is that the permanent magnet 1 is
4 in parallel, thereby moving the permanent magnet 14 to the contact device 1.
Switch setting is made between the influence mode and the non-influence mode for the contact point 17 of No. 1.

The contact switching device 30 in FIG. 2(B) is the contact switching device l.
The difference from O is that the permanent magnet 1 is
4 by 90 degrees, thereby switching and setting the permanent magnet 14 to either the influencing mode or the non-influencing mode for the contact 17 of the contact device 11.

The contact switching device 40 in FIG. 2(C) is the contact switching device i.
The difference from 10 is that the permanent magnet shielding plate 100 is moved by a hand operation unit (not shown) and the permanent magnet 14 is not covered by the shielding plate 100, so that the permanent magnet 14 is connected to the contact device 1.
The permanent magnet 14 is set to the influence mode for the first contact 17, and conversely, by covering the permanent magnet 14 with the shielding plate 100, the permanent magnet 14 is set to the non-influence mode.

[Effects of the Invention] As described above, according to the present invention, when configuring the load circuit so that it can be opened and closed not only by the remote control unit but also by the handheld operation unit, it is possible to avoid applying excessive force to the contacts. , it is possible to stabilize the opening/closing operation and extend the life of the contacts.

Further, according to the present invention, by setting the direction of the lines of magnetic force formed by the electromagnet device and the direction of the lines of magnetic force formed by the permanent magnet to be opposite to each other, it is possible to switch between the remote control unit and the hand control unit. However, the current state of contact opening/closing can always be reversed.

[Brief explanation of the drawing]

Figure 1 is a schematic diagram showing an embodiment of the present invention, Figure 2 (A)
-(C) are schematic diagrams showing modified examples of the present invention. 10.20.30.40...Contact switching device. 11... Contact device, 12... Electromagnet device. 13...Remote control section, 4...Permanent magnet. 5... Hand control unit, 6... Load circuit. 7... Contact. Table 1 Opening/closing operation of contacts during remote operation Patent applicant Representative Hiroshi Sekisui Chemical Co., Ltd. 1) Opening/closing operation of contacts during remote operation Figure 1 (A-) (B)

Claims (2)

[Claims] (1) A contact device that is installed in a load circuit and includes a pair of contacts that open and close depending on changes in magnetizing force, an electromagnetic device that is arranged near the contact device and can exert a magnetizing force on the contacts of the contact device, and an electromagnet. A remote control unit that switches the device to either an energized state or a de-energized state, an influence mode that is disposed near the contact device and that can exert a magnetizing force on the contacts of the contact device, and an influence mode that can exert a magnetizing force on the contacts. A contact opening/closing device comprising: a permanent magnet that can be switched to either the above-mentioned influence mode or the above-mentioned uninfluenced mode; and a hand-held operation unit that can be set to switch the permanent magnet to either the above-mentioned influence mode or the above-mentioned uninfluenced mode. (2) The contact switching device according to claim 1, wherein the direction of the lines of magnetic force formed around the contact by the electromagnet device and the direction of the lines of magnetic force formed around the contact by the permanent magnet are opposite to each other.