JPH019313Y2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Field of the Invention This invention relates to a polarized relay that is ultra-compact and can be used by being mounted on a printed circuit board, for example, and can provide highly sensitive opening/closing operations.

(b) Background of the invention In recent years, as this type of polarized relay has become ultra-miniaturized, a movable block that opens and closes with high sensitivity is required.

However, in current relays, a fulcrum is provided on the movable block in consideration of the smooth movement and operability of the movable block, and tilting operations are performed around this fulcrum. In order to obtain suitable spacing, the relay had to be large in size, and the sealing portion provided on the movable block had to be large, making it impossible to downsize the relay as a whole. Therefore, it is possible to eliminate the fulcrum and restrict the movement of the movable block using various parts mounted on the base and the case cover, but in this case, fine adjustment operations are required during installation, which is cumbersome and difficult to implement. Moreover, it becomes impossible to obtain stable operating performance of the movable block due to miniaturization, which was the initial objective.

(c) Purpose of the invention This invention aims to provide a polarized relay that is ultra-compact and can perform highly sensitive opening/closing operations without increasing the size of the movable block or degrading the operating performance of the movable block. purpose.

(d) Structure of the device In this device, opposite magnetic poles are formed facing each other by permanent magnets on a movable block in which a contact member is held between holding grooves, and a fixed iron core of an electromagnet is placed between the opposing surfaces. A polarized relay is provided to move a movable block in accordance with the magnetic pole of the contact, and is provided with an adjustment spring for auxiliary biasing on the side corresponding to the contact,
A mounting hole is opened in the adjusting spring at a position corresponding to the mounting of the movable block, a protrusion is connected to the mounting portion of the movable block, and the protrusion is fitted and fixed in the mounting hole of the adjusting spring, and the above-mentioned The relay is characterized in that the adjustment spring is a polarized relay in which the movable block biases the operating load in a direction that reduces the operating load.

(e) Function of the invention In the polarized relay of this invention, when the fixed core is excited by the application of an electromagnet, the movable block moves in the closing direction due to the synergistic effect of the magnetic force of the fixed core and the biasing force of the adjustment spring. Then, the contact member is moved in one direction, and when the application of the electromagnet is removed, the movable block is returned to the opening direction by the magnetic force of the permanent magnet, and the contact member is moved in the other direction.

(f) Effects of the invention As a result of the above, according to this invention, since the movable block is supported by an adjustment spring, unstable movement is regulated by the supporting action of the spring, and stable movement is achieved. At the same time, the firm fixation to the adjustment spring prevents rattling and provides stable linear motion, allowing the contact member to operate with stable acting force.

Moreover, since the movable block is auxiliary biased toward the contact compatible side by its adjustment spring, when the movable block is closed to the contact compatible side, it is not only used for magnetic attraction but also has a synergistic effect with the biasing force of the spring. Therefore, a so-called high-sensitivity operation is possible, in which the closing operation can be performed with a small amount of application.

When the application is removed, the movable block opens again based on the magnetic action of the permanent magnet and naturally returns to its original position.

In this way, by combining the adjustment spring and the magnetic pole, a compact movable block with excellent operating performance can be formed, and the relay can be easily miniaturized.

(g) Example of the invention An example of the invention will be described below in detail based on the drawings.

In Figures 1 to 3, a coil 2 is mounted in the center longitudinal direction of a rectangular parallelepiped resin-molded base 1, an adjustment spring 3 is attached to one side of the coil 2, and an adjustment spring 3 is attached to the other side. A fixed contact 4 and a movable contact 5 are mounted on a base 1 facing each other so as to be openable and closable.

The above-mentioned adjustment spring 3 is provided by punching a thin metal plate into a U-shape, and has hanging pieces 6, which are hung on both sides of the lower part.
6 is inserted into the base 1 and planted, and in order to bias one free end of the upper piece toward the contact compatible side, bend the other base end slightly and apply a constant biasing force to the free end of the upper piece. Grant.

A movable block 7 for opening and closing operations is attached to the free end of the movable block 7, and the attachment means is a long hole 8 bored at the free end of the upper piece and a long hole protruding from one side of the movable block 7. A circular projection 9 is fitted to connect them together.

The above-mentioned movable block 7 has a skylight 1 on the upper surface of the center part.
The tip of a fixed core 11 with a coil 2 fitted thereon is protruded from the lower surface position of the opening 0, and movable cores 12, 12 are disposed on both sides of the fixed core 11.
A permanent magnet 13 is attached between these movable iron cores 12, 12 to form a magnetic circuit that normally holds the contacts open. This is both movable cores 12,1
2 are provided at opposite magnetic poles, and when the electromagnet is not applied, the fixed iron core 11 and one of the movable iron cores 12 exhibit an attractive action, and the movable block 7 is positioned on the non-contact corresponding side against the biasing force of the adjustment spring 3. are doing.

A clamping groove 15 for holding the movable contact piece 14 is vertically provided on the free end side of the movable block 7 located on the opposite side from the adjustment spring 3, and normally the movable contact piece 14 is held on the open side. The opposite fixed contact 4 side remains open. These contacts 4 and 5 can be opened and closed based on the movement of the movable block 7.

16 is an insulating plate, and a narrow part 18 on the free end side of the movable block is formed in a recess 17 opened in a part of the upper surface of the insulating plate.
is inserted through the case cover 20, which is movably guided so that the movable block moves in parallel. Adjust the gap. Reference numeral 21 denotes an external terminal protruding from the lower surface of the base.

Next, the high sensitivity characteristics of the polarized relay of this invention will be explained with reference to FIG.

A is the spring load of the movable contact piece 14, and B
is the spring load of the adjustment spring 3, and C is the combined load of these.

Then, the movable block operates at point P1, and P2
Return with a point.

D is the attraction force curve when the voltage for operating the movable block is applied to the coil 2, E is the attraction force curve due to the magnetic action of the permanent magnet, and F is the voltage at which the movable block returns to the coil 2.
The figure shows the attractive force curve when applied to the curves E and F. The smaller the difference L between the two curves E and F, the smaller the electromagnet coil power consumption becomes, resulting in a highly sensitive polarized relay.

In the polarized relay configured in this way, the contact points 4 and 5 are normally maintained in an open state by the magnetic force of the permanent magnet 13.

Then, the fixed core 11 is excited by the application of the electromagnet, and based on this, the movable block 7 moves in the closing direction to close the contacts 4 and 5.

At this time, the movement of the movable block 7 is facilitated by the biasing force of the adjustment spring 3, so that the movable block 7 exhibits smooth movement.

Then, based on the cancellation of the application, the contacts 4 and 5 are separated and the movable block 7 returns to its original position, preparing for the next closing operation.

The movable block 7 described above is supported and guided by the connecting portion of the adjustment spring 3 and the recess 17 of the insulating plate 16, so that stable movement can be obtained.

[Brief explanation of drawings]

The drawings show an embodiment of this invention, and FIG. 1 is a plan view showing an ultra-small polarized relay. Figure 2 is its side view. Figure 3 is its front view. FIG. 4 is a diagram showing its high sensitivity characteristics. 3...adjustment spring, 4...fixed contact, 5...movable contact, 7...movable block.

Claims (1)

[Scope of Claim for Utility Model Registration] A movable block in which a contact member is held between holding grooves is formed with opposing magnetic poles using permanent magnets, and a fixed iron core of an electromagnet is placed between the opposing surfaces, and the magnetic poles of this iron core are A polarized relay is provided to move a movable block in accordance with the contact, and an adjustment spring for auxiliary bias is provided on the side corresponding to the contact, and a mounting hole is provided in the adjustment spring at a position corresponding to the attachment of the movable block. the movable block is opened, a protrusion is provided in series at the attachment site of the movable block, the protrusion is fitted and fixed in the attachment hole of the adjustment spring, and the movable block biases the adjustment spring in a direction in which the operating load is reduced. Polarized relay.