JPH03230439A - Variable characteristic reed relay - Google Patents

Abstract

PURPOSE:To facilitate the change-over of operational characteristics by changing the distance between a reed piece of a reed switch and a permanent magnet while a lever whose point presses a plate spring is moved. CONSTITUTION:A coil 2 is wound by a bobbin 1 comprising an insulator, and a reed switch 3 is fitted to a hole 11 penetrating the center part of the bobbin 1. A plate spring 6 is fixed to the bobbin 1 in one end, so as to form a cantilever, while permanent magnet 5 is fixed to the free end part thereof. A cover 7 which has a long hole 71 on the upper surface, and which is fitted to the outside of the bobbin 1, and a lever 8 held by the cover 7 so as to slide along the elongated hole 71, are also provided. When the point of the lever 8 is moved to the point where it is most distant from the magnet 5, the magnet 5 comes to the position nearest to a reed piece 31 of the switch 3. When the lever 8 is moved to the position nearest to the magnet 5, the magnet 5 is separated from the reed piece 31. Since this is due to the attracting force of the reed 31, when the distance between the reed piece 31 and the magnet 5 is changed while the lever 8 is moved, the change-over of operational characteristic is facilitated.

Description

[Detailed Description of the Invention] (Summary) Regarding reed relays used for control in various electronic devices, the purpose of this invention is to provide a variable characteristic reed relay whose operating characteristics can be easily changed. The coil that is rotated,
A reed switch fitted into a hole penetrating the center of the bobbin, a cantilevered leaf spring with one end fixed to the bobbin, a permanent magnet fixed to the free end of the leaf spring, and a permanent magnet attached to the top surface. a cover having a long hole and fitting onto the outside of the bobbin;
It has a lever held by the cover so that it can slide along the elongated hole, and is configured so that the distance between the reed switch reed piece and the permanent magnet changes as the lever moves, the tip of which presses the leaf spring. do.

[Industrial application field]

The present invention relates to a reed relay used for control in various electronic devices, and more particularly to a variable characteristic reed relay whose operating characteristics can be changed.

Reed relays, which incorporate reed switches as switching elements, are used to control various electronic devices as relays with excellent environmental resistance.Meter contact type reed relays, which close the contacts when current is applied to the coil, Break contact type reed relays, etc., in which the contacts open when a current is applied to the coil, have been developed.

However, depending on the application, it may be desirable to switch the characteristics of the same reed relay and use it for both meter contact type and break contact type. However, at present, there is no variable characteristic reed relay whose operating characteristics can be changed. Therefore, there is a demand for the development of such a variable characteristic reed relay.

(Prior Art) FIG. 3 is a perspective view showing the structure of a conventional reed relay.

A conventional make contact type reed relay, as shown in FIG. 3(a), has a coil 2 wound around a bobbin 1 made of an insulator, and a coil 2 that is inserted into a hole 11 passing through the center of the bobbin 1. The reed switch 3 is made up of a reed switch 3, and a cover 4 is fitted on the outside of the bobbin 1. When a predetermined current is applied to the coil 2, the contacts of the reed switch 3 are closed. As a result, the reed pieces 31 of the reed switch 3 become electrically conductive.

In addition, the conventional break contact type reed relay is shown in Figure 3 (b).
), a coil 2 is wound around a bobbin 1 made of an insulator, and a hole 11 passes through the center of the bobbin 1.
It consists of a reed switch 3 fitted into the bobbin 1 and a cover 4 fitted on the outside of the bobbin 1, and a permanent magnet 5 is provided close to the reed piece 31 of the reed switch 3.

Magnetic poles are generated at the contact portions of the reed pieces 31 with the permanent magnet 5 placed close to them, and the contact portions of the two opposing reed pieces 31 are attracted to each other. As a result, the contacts of the reed switch 3 are closed when a predetermined current is not applied to the coil 2, and when a predetermined current is applied to the coil 2, the magnetic poles of the contacts are canceled and the contacts are opened. That is, the reed pieces 31 of the reed switch 3 are in an open state.

Incidentally, by providing the permanent magnet 5 at a position away from the reed piece 31 as shown in FIG. 3(C), a highly sensitive type reed relay in which the contacts are closed with a small current value can be constructed. That is, a weak magnetic pole is generated at the contact portion of the reed piece 31 close to the permanent magnet 5, and the contact portions of the two opposing reed pieces 31 are biased in a direction in which they are attracted to each other. As a result, even if a weak current is applied to the coil 2, the contacts of the reed switch 3 are closed.

(Problem to be Solved by the Invention) However, a variable characteristic reed relay whose operating characteristics can be switched has not been developed. Therefore, in such applications, multiple reed relays must be used together and switched using a changeover switch or the like. There was a problem.

An object of the present invention is to provide a variable characteristic reed relay whose operating characteristics can be easily changed.

[Means to solve the problem] FIG. 1 is a perspective view showing an embodiment of the present invention.

The same objects are represented by the same symbols throughout the figures.

The above problem consists of a coil 2 wound around a bobbin 1 made of an insulator, a reed switch 3 fitted into a hole 11 penetrating the center of the bobbin 1, and a cantilever with one end fixed to the bobbin. A beam-shaped leaf spring 6, a permanent magnet 5 fixed to the free end side of the leaf spring 6, a cover 7 having a long hole 71 on the top surface and fitted on the outside of the bobbin 1, and a The distance between the reed piece 31 of the reed switch 3 and the permanent magnet 5 changes as the lever 8 moves, the tip of which presses the leaf spring 6. This is accomplished by the variable characteristic reed relay of the present invention, which is configured to vary.

[For production]

In Figure 1, there is a cantilever-shaped leaf spring with one end fixed to the bobbin, a permanent magnet fixed to the free end of the leaf spring, and a cover having a long hole on the top surface and fitting onto the outside of the bobbin. This book has a lever held in a cover so as to be able to slide along a long hole, and the distance between the reed switch reed piece and the permanent magnet changes as the lever moves, the tip of which presses a leaf spring. The reed relay of the invention can be used as a meter contact type reed relay, a break contact type reed relay, or a high sensitivity type reed relay by moving the lever. That is, it is possible to realize a variable characteristic reed relay whose operating characteristics can be easily changed.

〔Example〕

Embodiments of the present invention will be described below with reference to the accompanying drawings. Note that FIG. 2 is a diagram for explaining the operation of the characteristic switching section.

As shown in FIG. 1, the variable characteristic reed relay according to the present invention includes a coil 2 wound around a bobbin 1 made of an insulator, and a coil 2 inserted into a hole 11 passing through the center of the bobbin 1. A reed switch 3, a cantilever-shaped leaf spring 6 having one end fixed to the bobbin 1, a permanent magnet 5 fixed to the free end side of the leaf spring 6, and a bobbin 1 having a long hole 71 on the top surface.
A cover 7 is fitted onto the outside of the bobbin 1, and a lever 8 is held by the cover 7 so as to be slidable along a long hole 71. The leaf spring 6 is pressed toward the bobbin 1 by the tip of the lever 8. .

In such a variable characteristic reed relay, as shown in FIG. 2(a), when the tip of the lever 8 is moved in the direction furthest away from the permanent magnet 5, the pre-bent leaf spring 6 bends to its free end due to its own restoring force. is lifted, and the permanent magnet 5 fixed to the leaf spring 6 is attached to the reed piece 31 of the reed switch 3.
closest to. Lead piece 31 with permanent magnet 5 close to it
A magnetic pole is generated at the contact portion, and the contact portions of the two opposing lead pieces 31 are attracted to each other. By applying a current to the coil 2 in a direction that cancels out the magnetic poles of the contact portion, the variable characteristic reed relay operates as a break contact type reed relay.

In addition, in the above variable characteristic reed relay, Fig. 2 (b)
As shown in , when the tip of the lever 8 is moved in the direction closest to the permanent magnet 5, the raised free end of the leaf spring 6 is pressed against the bobbin 1, and the permanent magnet fixed to the free end side of the leaf spring 6 is pressed against the bobbin 1. The magnet 5 separates from the lead piece 31. As a result, the attractive force at the contact portion of the reed piece 31 becomes extremely small, and when a predetermined current is applied to the coil 2, the variable characteristic reed relay operates as a meter contact type glued relay where the contact points are closed.

Furthermore, in the above variable characteristic reed relay, Fig. 2 (C)
As shown in the figure, when the tip of the lever 8 is moved to the middle between the free end side and the fixed end side of the leaf spring 6, the permanent magnet 5 fixed to the leaf spring 6 approaches the reed piece 31 of the reed switch 3.
A weak magnetic pole is generated at the contact portion of the lead piece 31 near the permanent magnet 5, and urges the contact portions of the two facing lead pieces 31 in a direction in which they are attracted to each other. By applying a current to the coil 2 in a direction that increases the magnetic pole of the contact portion, the variable characteristic reed relay operates as a highly sensitive reed relay.

A cantilever-shaped leaf spring with one end fixed to the bobbin in this way, a permanent magnet fixed to the free end of the leaf spring, and a cover that has a long hole on the top surface and fits on the outside of the bobbin. The present invention has a lever held by a cover so as to be able to slide along a long hole, and the distance between the reed piece of the reed switch and the permanent magnet changes as the lever moves, the tip of which presses a leaf spring. By moving the lever, this reed relay can be used as a meter contact type reed relay, a break contact type reed relay, or a high sensitivity type reed relay. That is, it is possible to realize a variable characteristic reed relay whose operating characteristics can be easily changed.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to provide a variable characteristic reed relay whose operating characteristics can be easily changed.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention, FIG. 2 is a view for explaining the function of a characteristic switching section, and FIG. 3 is a perspective view showing the structure of a conventional reed relay. In the figure, 1 is a bobbin, 2 is a coil, 3 is a reed switch, 5 is a permanent magnet, 6 is a leaf spring, 7
The cover 8 represents a lever, 11 represents a through hole, 31 represents a lead piece, and 71 represents a long hole. FIG. 1 (CL) is a perspective view showing an embodiment of the present invention. FIG. 2 is a perspective view showing the structure of a conventional glide relay.

Claims (1)

[Claims] A coil (2) wound around a bobbin (1) made of an insulator, and a hole (1) passing through the center of the bobbin (1).
1), a cantilever-shaped leaf spring (6) whose one end is fixed to the bobbin (1), and a reed switch (3) which is fixed to the free end side of the leaf spring (6). a permanent magnet (5) formed of It has a lever (8) held by the cover (7), and as the lever (8) whose tip presses the leaf spring (6) moves, the reed piece (31) of the reed switch (3) )
A variable characteristic reed relay characterized in that the distance between the permanent magnet (5) and the permanent magnet (5) is configured to vary.