JPH0511631Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to an electromagnetic relay used mainly for switching on and off high frequency circuits.

[Background Art] Generally, in electromagnetic relays equipped with contacts used for opening and closing high-frequency circuits, the contacts are housed within a shield, so it is difficult to adjust the spring force of the contact springs after assembly. However, it is difficult to match the suction force and spring load characteristics. That is, there is a problem in that the impression voltage and open circuit voltage vary depending on the product.

[Purpose of the invention] The present invention has been made in view of the above-mentioned points, and its purpose is to provide an adjustment spring that applies a spring force in the swinging direction of the movable block, and to reduce the spring force of the adjustment spring. To provide an electromagnetic relay which can easily adjust an actuating voltage and an open circuit voltage by adjusting force.

[Disclosure of the invention] (Structure) The electromagnetic relay according to the invention is movable by sliding a movable block between two predetermined positions as the electromagnetic device disposed on the base is excited. In an electromagnetic relay in which a contact section linked to a block is opened/closed, there is a balanced spring consisting of a plate spring having one end fixed to a base and the other end fixed to a movable block and having a spring force in the sliding direction of the movable block, and a movable spring. An adjustment spring that has a spring force in the sliding direction of the block and is protruded from the movable block, and is exposed at a position where it can come into contact with the adjustment spring so that the position of the movable block in the sliding direction can be adjusted. It is equipped with a pressing member provided on the base so that the movable block is moved, and by providing an adjustment spring that applies a spring force in the sliding direction of the movable block and adjusting the warp spring force, the moving voltage and the This allows the open circuit voltage to be easily adjusted.

(Embodiment) As shown in FIGS. 1 to 3, a case 1 is formed of a base 11 made of synthetic resin and a cover 12 fitted onto the base 11. The base 11 extends from each peripheral edge of the bottom plate 11a to the peripheral wall 1.
1b is formed in a shape that stands up and opens upward, and the cover 12 is formed in a shape that opens downward and is fitted onto the base 11 so as to surround the outer periphery of the peripheral wall of the base 11. Inside the base 11, the base 11 is arranged so as to face one surface of the inner peripheral surface of the peripheral wall 11b.
It is partitioned into a magnet storage chamber 14 and a contact storage chamber 15 by a partition plate 13 formed integrally with the magnet storage chamber 14 and the contact storage chamber 15 . The electromagnet device 2 is housed in the magnet storage chamber 14 .

The electromagnet device 2 has a coil 21 wound around a cylindrical coil frame 22 , and the end of the coil 21 is connected to a coil terminal 23 passing through the base 11 .
An iron core 24 is inserted through the coil frame 22, and the iron core 2
One end of a yoke 25 is magnetically and mechanically coupled to one end of the yoke 4 . The yoke 25 extends along the side surface of the coil 21, and the other end of the yoke 25 is disposed opposite to the other end of the iron core 24. Further, the yoke 24 is in close contact with the partition plate 13 and the base 11
Fixed in position above. A residual plate 26 is attached to the surface of the iron core 24 facing the yoke 25 to increase magnetic resistance. On the opposite side of the yoke 25 with the iron core 24 in between, there is a magnetic pole piece 2.
7 is provided, and one end of the magnetic pole piece 27 extends to a position close to the yoke 25.

A mounting hole 16 is bored at one location on the tip surface of a peripheral wall 11b surrounding the magnet storage chamber 14 in the base 11. A mounting plate 31 provided on the movable block 3 is press-fitted into the mounting hole 16, and the inner circumferential surface of the mounting hole 16 and the side surface of the mounting plate 31 are pressed into the mounting hole 16 when the mounting plate 31 is press-fitted into the mounting hole 16. 31 is base 1
It is formed in a shape that moves in a direction perpendicular to the bottom plate 11a of No. 1. The movable block 3 has a balance spring 32 formed into a rectangular shape by bending a thin metal plate as a spring material. Piece 32a
A fixed piece 32b that connects one end to the mounting plate 31 is fixed, and a connecting piece 32c that connects the other end of both flexible pieces 32a and is fixed to the movable base plate 33. An adjustment spring 32d is integrally formed on the extension line of the flexible piece 32a. The balance spring 32 and the movable substrate 32 are connected as follows. That is, the mounting pieces 32e provided at the other end of each flexible piece 32a
, the mounting protrusion 3 is in contact with the side surface of the movable board 33.
3a and the liquid reservoir 33 provided on the movable substrate 33.
Pour adhesive onto b and connect the connecting piece 32c to the movable board 33.
It sticks to. Here, the mounting plate 31 and the movable substrate 33 are formed to have the same width at both ends of the flexible piece 32a, so that the movable substrate 33 moves in parallel within the sliding range. A permanent magnet 34 and a permanent magnet 3 are provided at one end of the movable substrate 33.
One end of a pair of magnetic pole plates 35 that abuts on each magnetic pole surface of 4 is buried, and the other end of each magnetic pole plate 35 is embedded with the above-mentioned yoke 25 and magnetic pole pieces 27 and the iron core 24.
are respectively inserted into the gap formed between the two. Here, both the permanent magnet 34 and the magnetic pole plate 35 are fixed to the movable substrate 33 with an adhesive.

With the above configuration, when the coil 21 is not energized, the magnetic pole plate 35 comes into contact with at least one of the iron core 24 and the yoke 25, and at that position, the permanent magnet 34
forms a magnetic path in which is inserted. On the other hand, permanent magnet 3
When the coil 21 is energized in a direction repelling the magnetic force of the balance spring 32, the flexible piece 32a of the balance spring 32 is bent, the magnetic pole plate 35 is separated from the yoke 25, and the iron core 24 and the magnetic pole piece 2
The magnetic pole plate 35 is in contact with at least one of the magnetic poles 7 and 7.
At this position, a residual plate 26 that increases magnetic resistance is interposed between the iron core 24 and the magnetic pole plate 35, so if the current is stopped, the balance spring 3
The magnetic pole plate 35 is returned to its original position by the spring force and magnetic force. A positioning hole 36 is provided through the movable substrate 33, and by inserting a positioning protrusion 28 provided on the coil frame 22 into the positioning hole 36, the sliding range of the movable substrate 33 is regulated. There is.

Meanwhile, a pair of holding protrusions 37 that open downward in FIG. 1 are formed on the side surface of the movable base plate 33, and the upper end of a holding piece 38 having a movable contact spring 40 at its lower end is attached inside the holding protrusions 37.
An adhesive introduction hole 39 is formed on the upper surface of the movable substrate 33, and a holding protrusion 37 is inserted from the adhesive introduction hole 39.
A continuous groove is formed in the adhesive introduction hole 3 when the holding piece 38 is inserted into the holding protrusion 37.
When adhesive is poured from 9, the adhesive adheres to the holding protrusion 3.
7, and the retaining piece 38 is bonded in the retaining projection 37.
The movable contact springs 40 are arranged in a pair in a direction parallel to the flexible piece 32a of the balance spring 32, and the extension direction of the movable contact springs 40 is set to be parallel to the side surface of the mounting plate 31 described above.
The movable contact springs 40 are spaced apart in the sliding direction of the movable base plate 33. The tip of the movable contact spring 40 is divided by a slit running in the longitudinal direction of the movable contact spring 40. This movable contact spring 40 is inserted into the contact accommodating chamber 15.

Almost the entire inner peripheral surface of the contact storage chamber 15 is covered with a shield 41. The shield 41 is formed by bending a thin metal plate, and is connected to the contact storage chamber 1.
5 is press-fitted into the contact housing chamber 15 so as to be in close contact with the inner peripheral surface of the contact housing 15 . That is, as described above, yoke 2
5 is disposed in close contact with the partition plate 13, and the shield 41 is in close contact with the inner peripheral surface of the contact storage chamber 15 surrounded by the peripheral wall 11b of the base 11 and the partition plate 13. Even if the shield 41 is thin, the shield 41 can be supported by the yoke 25, and deformation of the shield 41 can be prevented. That is, the shape of the shield 41 does not vary from product to product, and stable operation can be achieved. Furthermore, since the partition plate 13 is interposed between the yoke 25 and the shield 41, the partition plate 13 is interposed between the yoke 25 and the shield 41.
It provides insulation between the two. The shield 41 is provided with four shield terminals 42 that penetrate the base 11, and the shield terminals 42 are grounded.
One end of three contact pins 43 having a circular cross section passing through the base 11 is inserted into the contact storage chamber 15, and as the movable block 3 slides, the central contact pin 43 and the remaining contact pins 43 are inserted. or one contact pin 4
The contacts are opened and closed by short-circuiting between the contact point and the contact point 3 using a movable contact spring 40. A pressing piece 44 is integrally extended to the shield 41 at a position where it can come into contact with the adjustment spring 32d. The pressing piece 44 can be pressed against the movable block 3 by twisting the base.
It is formed to be plastically deformed in the sliding direction. Therefore, by adjusting the amount of deformation of the pressing piece 44, the contact position between the adjusting spring 32d and the pressing piece 44 can be adjusted in the sliding direction of the movable block 3. Piece 3
The force acting on the movable block 3 in the sliding direction can be adjusted by the spring force between the movable contact spring 2a and the movable contact spring 40 and the magnetic force of the electromagnet device 2.
As a result, the force required to slide the movable block 3 can be adjusted, and the impression voltage and open circuit voltage can be adjusted. Here, the pressing piece 44 is formed integrally with the shield 41, but as shown in FIG.
If insert molding is performed on the part b, even better high frequency characteristics can be obtained. Further, in the above embodiment, the adjustment spring 32d is provided above the movable contact spring 40, but the adjustment spring 32d may be provided on the opposite side of the movable block 3, and furthermore, the adjustment spring 32d may be provided on both sides of the movable block 3. A spring 32d may also be provided.
By providing such an adjustment spring 32d,
In addition to the magnetic force of the electromagnet device 2, the spring force of the balance spring 32, and the spring force of the movable contact spring 40, the spring force of the adjustment spring 32d can be applied to the movable block 3, and the spring force of the adjustment spring 32d can be adjusted. By doing so, the touching voltage and open circuit voltage can be adjusted. Moreover, the pressing pieces 44, 44' are attached to the base 1.
Since it is exposed from the peripheral wall 1, the amount of deformation can be easily adjusted even after assembly.

[Effects of the invention] As mentioned above, the present invention has a structure in which the movable block slides between two predetermined positions as the electromagnetic device disposed on the base is excited, thereby interlocking with the movable block. In an electromagnetic relay in which the contact part opens and closes, a balance spring consisting of a plate spring having one end fixed to a base and the other end fixed to a movable block and having a spring force in the sliding direction of the movable block, and a An adjusting spring which is a plate spring having a spring force in the moving direction and is provided protruding from the movable block, and an adjusting spring that is exposed at a position where it can come into contact with the adjusting spring so that the position of the movable block in the sliding direction can be adjusted. and a pressing member provided on the base, and is provided with an adjustment spring that applies a spring force in the sliding direction of the movable block, and at a position where it can come into contact with the adjustment spring, the movable block slides. Since the base is provided with a pressing member whose position in the direction can be adjusted, the spring force of the adjustment spring in the sliding direction of the movable block can be adjusted by adjusting the position of the pressing member. Since it is exposed on the base, it has the advantage that the sensing voltage and open circuit voltage can be easily adjusted after assembly.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view showing an embodiment of the present invention;
FIG. 2 is a horizontal sectional view of the same, FIG. 3 is a longitudinal sectional view of the same, and FIG. 4 is an exploded perspective view showing another embodiment of the present invention. 2 is an electromagnet device, 3 is a movable block, 11 is a base, 32 is a balance spring, 32d is an adjustment spring, 4
4, 44' are pressing pieces.

Claims (1)

[Scope of utility model registration request] In an electromagnetic relay in which a contact section linked to a movable block is opened and closed by sliding the movable block between two predetermined positions in response to excitation of an electromagnetic device disposed on the base, one end is connected to the base. One end of the balance spring is fixed to the movable block, and the other end is fixed to the movable block, and has a spring force in the sliding direction of the movable block. The movable block includes an adjustment spring protruding from the block, and a pressing member provided at the base so as to be exposed at a position where it can come into contact with the adjustment spring so that the position of the movable block in the sliding direction can be adjusted. Electromagnetic relay.