JPS6312341B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a reed relay.
There is a two-pole reed relay that is a glass tube reed switch type. However, this reed relay has a short lead span and requires a large excitation force from a coil in order to obtain a large contact pressure, so if the lead span is increased, the relay becomes large. Furthermore, although the lead itself is made of a magnetic material, the magnetic material has a high electrical resistance, so there is a drawback that the conductor resistance is large and there is a large contact power loss when electricity is applied.

On the other hand, there was one in which a conductive spring was connected to the lead (for example, Utility Model Publication No. 47-1650). However, this requires shortening the lead or increasing the length of the coil frame, and furthermore, since it is within the coil frame, it has the disadvantage that it is not easy to adjust the characteristics of the conductive spring and the lead.

Therefore, an object of the present invention is to provide a reed relay in which the characteristics of the leads and conductive spring can be easily adjusted without shortening the leads or lengthening the coil frame.

An embodiment of the invention is shown in FIGS. 1 to 5. That is, in this reed relay, an iron core 2 is passed through the center of a coil bobbin 1, and both ends thereof are enlarged in area in a T-shape, and an excitation coil 3 is wound around the body of the coil bobbin 1. Also coil bobbin 1
Yoke support stands 6a to 6 are attached to the flanges 4 and 5 at both ends of the
d, of which yoke support stands 6b, 6d
One end of the conductive springs 7, 8 formed of copper alloy is buried in the holder, and the other end is exposed to both ends of the iron core 2, and the base ends of the leads 9, 10 are welded to the other end. In addition, the free end portions 9a and 10a of the coil bobbin 1 are horizontally extended in the same direction on the sides of the coil bobbin 1. Further, hook-shaped yokes 11a to 11d are attached to the yoke supports 6a to 6d of the coil bobbin 1, respectively, to form two yoke pairs 12 and 13, and the gaps 1 between the magnetic poles of the yoke pairs 12 and 13 are
4, 15, the free ends 9a, 10 of the leads 9, 10
Position a. Also, the upper yokes 11a and 11c of the yoke pairs 12 and 13 and the lower yoke 1
1b and 11d are facing each other, and the lower yoke 11
A permanent magnet 16 is adhesively installed between b and 11d, and a gap 17 is provided between the permanent magnet 16 and the upper yokes 11a and 11c. This permanent magnet 16 is connected to each yoke pair 1
The upper yokes 11a, 11c and the lower yokes 11b, 11d of 2, 13 are magnetized, and the magnetization directions are opposite in the yoke pair 12, 13 (indicated by N and S in the figure). ).

The coil bobbin 1 configured in this way is installed as a base 1.
8, each terminal 19 is suspended below the base 18, and covered with a case 20 made of magnetic material.
Note that 21 is a coil-wound terminal.

The operation of this reed relay will be explained. First, when the coils are not energized, the permanent magnets 16 of each yoke pair 12, 13 are arranged unevenly on the lower yokes 11b, 11d. , 10, the free ends 9a, 10a of the lower yokes 11b, 11d
A magnetic circuit is formed by the lower yoke 11d, the lead 10, the iron core 2, the lead 9, and the lower yoke 11b using the permanent magnet 16 as a magnetomotive force.

Next, when the excitation coil 3 is energized to pass a magnetic flux through the iron core 2 in the opposite direction to the magnetic flux of the permanent magnet 16, the free ends 9a, 10a of the leads 9, 10 generate a repulsive force, and the conductive spring 7 , 8 and the leads 9, 10 are attracted to the upper yokes 11a, 11c of each yoke pair 12, 13, and a magnetic field consisting of the iron core 2, lead 9, upper yokes 11a, 11c, and lead 10 is generated. form a circuit.

As described above, the reed relay of the present invention includes an iron core, an excitation coil wound around the iron core, a pair of leads whose base ends are disposed near both ends of the iron core, and a conductive spring extending in the same direction as the lead, having elasticity in the same direction as the operating direction of the lead, and connected to each proximal end of the lead to hold the lead; and a conductive spring facing the free end of the lead, respectively. Since the present invention includes a yoke that has magnetic poles that magnetically couple the magnetic poles to each other, and a permanent magnet that polarizes the magnetic poles, the following effects are achieved.

In other words, since the base end of the lead is held by a conductive spring, the lead span can be increased without increasing the length of the magnetic lead, and therefore the movement energy of the lead itself is small. On the other hand, the contact pressure can be increased and the sensitivity can be increased, and the stiffness of the entire lead can be reduced. Furthermore, since the lead base is made to be a good conductor, the conductor resistance of the contact can be reduced, and contact loss power can be reduced. In addition, since one magnetic circuit is formed by the iron core passing through the excitation coil, a pair of leads placed outside the excitation coil, and the yoke, if two leads are provided inside the coil, one of the leads will have the coil, Whereas it is difficult to simultaneously operate two reeds in the same manner because the magnetic flux of the permanent magnets may concentrate, the excitation coil and the permanent magnet each allow simultaneous operation of the reeds.
Further, since the leads are supported outside the coil by conductive springs extending in the same direction as the leads, the characteristics of the leads and conductive springs can be easily adjusted.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway perspective view of an embodiment of the present invention, FIG. 2 is a cross-sectional plan view thereof, and FIG.
4 is a sectional view taken along the line of FIG. 2, and FIG. 5 is a sectional view taken along the line of FIG. 2. 2... Iron core, 3... Excitation coil, 7, 8... Conductive spring, 9, 10... Lead, 11a to 11d
...Yoke, 16...Permanent magnet.

Claims (1)

[Claims] 1. An iron core, an excitation coil wound around the iron core, a pair of leads whose base ends are located near both ends of the iron core, and a pair of leads extending in the same direction as these leads and controlling the operation of the leads. a conductive spring that has elasticity in the same direction as the direction and is connected to each proximal end of the lead to hold the lead; and a conductive spring that has magnetic poles facing each other at the free end of the lead, and that magnetically attracts the magnetic poles to each other. A reed relay comprising a coupling yoke and a permanent magnet polarizing the magnetic poles.