JPS595942Y2 - Okretsuchi - Google Patents

Description

[Detailed description of the invention] This invention relates to a dashpot type delay switch.

A conventional dashpot type delay switch is comprised of a dashpot 1, a permanent magnet 2, an armature 3, and a switch 4, as shown in FIG.

The dash pot 1 is constructed by placing a cylinder 6 and a coil spring 7 in a pot 5, injecting oil 8, and enclosing it with a magnetic pole piece 9.

This pot 5 is fixed through a yoke 10.

The permanent magnet 2 is provided so as to be movable by a handle (not shown) to the position indicated by the two-dot chain line.

The armature 3 is rotatable about a shaft 11, and is engaged with a leaf spring 13 to drive the contact portion 12 of the switch 4 toward and away from the contact portion 12.

When the permanent magnet 2 comes to the position indicated by the two-dot chain line with this delay switch, the magnetic path of the permanent magnet 2 → yoke 10 → cylinder 6 → magnetic pole piece 9 → armature 3 → permanent magnet 2 is formed, and the permanent magnet 2 The magnetic force of the cylinder 6 slowly moves the magnetic pole piece 9
, the magnetic resistance of the magnetic path gradually decreases and the magnetic flux gradually increases.As a result, the attractive force of the magnetic pole piece 9 increases, attracting the armature 3 and opening the contact portion 12.

However, this conventional delay switch has a permanent magnet 2
Since the direction of magnetization is perpendicular to the direction of movement,
The driving force at the stable position of the permanent magnet 2 was small, and therefore the handle (not shown) had a poor operating feel.

Furthermore, a gap for movement is required between the yoke 10 and the permanent magnet 2, which increases magnetic resistance and reduces the attractive force of the armature 3, making it impossible to realize a delay switch for large currents.

Therefore, an object of this invention is to provide a delay switch that has a good operating feel and a large opening/closing load capacity.

FIG. 2 is a front view of the internal structure of an embodiment of the delay switch of this invention, and FIG. 3 is a side view of the internal structure.

In these figures, the same parts as those in FIG. 1 are given the same reference numerals.

What should be noted is that the permanent magnet 14 is magnetized in the moving direction.

The permanent magnet 14 has magnetic plates 15 and 16 fixed to both magnetic pole faces, and is configured to be moved in the direction of an arrow 18 by a handle 17.

At the position shown by the solid line, a magnetic circuit is formed by the yoke 19, and the handle 17 is held at that position by the permanent magnet 14.

This position is the on position. Next, when the handle is operated to the position shown by the two-dot chain line, the permanent magnet 14 moves to the position shown by the two-dot chain line, and the permanent magnet 14 → magnetic plate 15 → yoke 2
0 → Armature 3 → Magnetic pole piece 9 → Cylinder 6 → Yoke 2
A magnetic circuit of 1→magnetic plate 16→permanent magnet 14 is formed.

As a result, the cylinder 6 moves slowly in the direction of the magnetic pole piece 9 against the coil spring 7 due to the magnetic force of the permanent magnet 14, and as a result, the magnetic resistance of the magnetic circuit gradually decreases and the magnetic flux gradually increases. The attraction force of the armature 3 by the magnetic pole piece 9 increases, the armature 3 is attracted to the magnetic pole piece 9, and the contact portion 12 of the switch 4 is opened and separated.

In this way, the delay switch is turned off after a certain period of time has elapsed since the handle 17 was operated.

In this case, the yoke 20 is fixed at a position where it contacts the armature 3 that is attracted to the magnetic pole piece 9 and also contacts the magnetic plate 15 of the permanent magnet 14 shown by the two-dot chain line. It may be omitted if the force is weak.

In addition, in order to clearly show the movement of the permanent magnet 14 with respect to the yoke 31, FIG. 3 is a view from the direction of the switch section, with the armature section, switch section, and yoke 20 omitted.

As described above, in the delay switch of this invention, since the magnetization of the permanent magnet is in the moving direction, the permanent magnet is reliably attracted and held by the yoke in both stable positions (on and off positions), so you can feel the snap of the handle. gets better.

Furthermore, since the suction force of the armature can be increased, the contact pressure can be increased, and the switching load capacity of the switch can be increased.

[Brief explanation of the drawing]

FIG. 1 is a structural diagram of a conventional example, FIG. 2 is an internal structural diagram of an embodiment of the delay switch of this invention, and FIG. 3 is a side sectional view thereof. 1... Dashpot, 3... Armature, 4... Switch, 14... Permanent magnet, 19, 20.21... Yoke .

Claims (1)

[Scope of utility model registration request] In a delay switch in which a permanent magnet enters between a yoke fixed to a dashpot and an armature and the armature is attracted to the dashpot, the armature opens and closes the switch, and the permanent magnet is attached in the direction of entry. A delay switch characterized by being magnetic.