JPS629636Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a reed relay used in various communication devices.

Conventionally, in order to house the main components of a reed relay, the reed switch and coil, in a predetermined case (container), the reed switch's lead piece was cut to an appropriate length and soldered or welded to the relay terminal. connected by. The trend toward miniaturization is particularly pronounced in DIP (Dual Inline Package) type reed relays, etc., and the lead pieces of reed switches must be cut very short.

However, cutting the lead pieces very short causes a decrease in sensitivity due to a decrease in the length of the magnetic lead pieces that form the magnetic circuit, and inevitably leads to a decrease in magnetic efficiency. In order to avoid this, a highly sensitive reed switch, that is, one with a small contact gap is required. However, reed switches with a small contact gap have a small contact opening force, are prone to welding and sticking, and have a low withstand voltage between contacts, which inevitably limits the electrical usage conditions (contact switching power, switching speed, etc.). Ru.

SUMMARY OF THE INVENTION An object of the present invention is to provide a reed relay that can operate with high sensitivity without increasing drive power by arranging the reed switch's reed pieces as magnetic circuit forming members.

The reed relay according to the present invention includes a reed switch formed by magnetically driven reed pieces that are brought into contact and separated from each other and sealed in a sealed container, and a winding that drives the switch. A magnetic flux path is formed by extending the lead piece extraction portion to the outer periphery of the winding.

This will be explained below with reference to the drawings.

FIG. 1 is a configuration diagram showing an example of a conventional reed relay, in which reference numeral 1 is a reed switch formed by sealing a pair of reed pieces in a sealed container, and 2 is an excitation winding that controls opening and closing of the reed switch 1. , 3 indicates a winding frame around which the excitation winding 2 is wound, and 4 indicates a lead piece connection terminal implanted in the winding frame 3. When a reed relay configured in this way performs opening/closing operations,
Magnetic fluxes Φ1 and Φ2 pass through paths as shown in FIG. However, this magnetic path is an air gap and inevitably causes a decrease in sensitivity. Further, although there are cases where a magnetic path is constructed by arranging individual yoke parts, miniaturization is significantly restricted.

FIG. 3 is a plan view showing an embodiment of the reed relay according to the present invention, and the winding frame is not shown. As shown in the figure, after the lead piece of the reed switch 1 is electrically connected to the terminal 4, it is bent along the outer periphery of the excitation winding 2 to form an S-shape without being cut. There is. According to this configuration, since the lead pieces 5 and 6 are arranged in the paths of the magnetic fluxes Φ1 and Φ2 shown in FIG. 2, the magnetic resistance can be lowered and the sensitivity can be improved without increasing the driving power.

FIG. 4 is a configuration diagram showing another embodiment of the reed relay according to the present invention, in which the reed piece pull-out portions 5' and 6' of the reed switch 1 electrically connected to the terminal 4 are connected to the outer periphery of the excitation winding 2. The wires are bent along the windings and are placed opposite each other with a small gap in order to minimize magnetic resistance above the windings. According to this configuration, the magnetic flux path becomes a completely closed magnetic path, and the magnetic resistance can be further reduced.

As explained above, according to this invention, by constructing a magnetic flux path using the reed piece lead-out portion of the reed switch, it is possible to obtain a reed relay that is extremely small and operates with high sensitivity with low driving power.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an example of a conventional reed relay, FIG. 2 is a diagram showing the flow of magnetic flux, and FIGS. 3 and 4 are block diagrams showing an embodiment of the reed relay according to this invention. 1... Reed switch, 2... Excitation winding, 3...
...Winding frame, 4...Relay terminal, 5, 5',
6, 6'...Lead piece pull-out part.

Claims (1)

[Scope of utility model registration request] A reed switch includes a reed switch formed by magnetically driven reed pieces that are brought into contact and separated from each other and sealed in a closed container, and a winding that drives the switch, and the reed switch that is pulled out from the closed container is connected to the winding. A reed relay characterized by having a magnetic flux path extended to the outer circumference of the wire.