JPS63310532A - Electromagnetic relay - Google Patents

Abstract

PURPOSE:To stabilize the operational property and to prevent the abrasion of a shaft by furnishing a driving member to drive a contact mechanism near the tip of a movable block and a shaft to be the center of the rotation at the rear end of the driving member. CONSTITUTION:This relay is composed of a base 1, an electromagnet 2, contact mechanisms 3 and 4, a movable block 6, and a cover 7. The block 6 presents approximately T form in the horizontal section and furnishes a shaft 64 to be the center of the rotation at the rear end, as well as a pair of movable iron pieces 63a and 63b to hold a permanent magnet 62, inserted and formed to a wide driving member 61 positioned near the the front end. Since the distance between the shaft 64 as the rotation center and the driving member 61 is fairly long in this composition, the rotation angle of the block 6 to drive the contact mechanisms 3 and 4 is small. As a result, a friction resistance generated between the shaft 64 and a shaft hole 17a is made small, and the abrasion of the shaft 64 is made small as well as the operational property is stabilized.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electromagnetic relay, and particularly to a support structure for a movable block.

Conventional technology and its problems Conventionally, as an electromagnetic relay, for example,
There is one described in Japanese Patent No. 7554.

That is, as shown in FIG. 9, the electromagnet section 2, the movable block 6, and the contact mechanism section 3 are arranged in sequence on the same straight line.

The electromagnet part 2 has a through hole in the center of the yoke 2゜7 having a U-shaped planar path, and one end of a rod-shaped iron core 25 around which a coil 26 is wound is fitted and fixed into this through hole, while other The end portion is a magnetic pole portion.

The movable block 6 has a shaft portion 64 serving as a rotation center on an extension line of the axis of the iron core 25, and a pair of movable iron pieces 63a and 63b integrally sandwiching a permanent magnet 62 are protruded from the tip portion. On the other hand, a drive section 61 is formed at the rear end. Furthermore, the movable iron pieces 63a and 63b are connected to the iron core 2.
5 and both ends of the yoke 27 alternately.

The contact mechanism section 3 includes a common terminal 32 disposed along an extension of the axial center of the iron core 25, and a pair of movable contact pieces 31, 3l facing each other with the common terminal 32 in between. The tip end of the movable contact piece 31.31 is in contact with the drive part 61 of the movable block 6.

Therefore, based on the excitation and demagnetization of the electromagnet part 2, the movable iron piece 6 alternately attracts and separates from the magnetic pole part of the iron core 25.
3a and 63b, when the movable block 6 rotates about the shaft portion 64, the driving portion 61 of the movable block 6 alternately suppresses and releases the tips of the movable contact pieces 31 and 31, opening and closing the contacts.

However, according to the conventional electromagnetic relay, the shaft portion 64 of the movable block 6 located between the electromagnet portion 2 and the contact mechanism portion 3 is positioned close to each of the electromagnet portion 2 and the contact mechanism portion 3. , so the turning radius is short.

Therefore, in order to drive the movable contact pieces 31, 31 of the contact mechanism section 3 to open and close the contacts, it is necessary to increase the rotation angle of the movable block 6. As a result, the frictional resistance between the shaft portion 64 and the bearing portion (not shown) increases, the operating characteristics become unstable, and the shaft portion etc. are prone to wear.

Moreover, since the rotation angle of the movable block 6 is large, the tip of the drive portion 61 easily rubs the movable contact pieces 31°31. Therefore, due to the frictional resistance of the drive section 61 against the movable contact pieces 31.degree. 31, the rotation of the movable block 6 becomes even more unstable and wear becomes more likely to occur.

Furthermore, since the rotation angle of the movable block 6 is large, the movable iron pieces 63a and 63b tend to make partial contact with the magnetic pole portions of the iron core 25 and the yoke 27. Therefore, the movable iron pieces 63a, 6
3b cannot make surface contact with the magnetic pole portions of the iron core 25 and the yoke 27, resulting in a problem that magnetic efficiency is poor.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention includes an electromagnet part whose magnetic pole part is one end of an iron core around which a coil is wound, and an electromagnet part which can be brought into and out of contact with the magnetic pole part of the iron core. In the electromagnetic relay, the electromagnetic relay has a movable iron piece disposed at the distal end thereof, and a movable block that rotates based on excitation and demagnetization of the coil to drive a contact mechanism is disposed on the same straight line, the distal end of the movable block. A drive section for driving the contact mechanism section is provided nearby, and a shaft section serving as a center of rotation is provided at the rear end.

Operation and Effect Therefore, according to the present invention, the distance from the shaft serving as a rotation fulcrum to the movable iron piece and the distance from the shaft to the drive portion are each longer than those of the conventional method.

Therefore, the rotation radius of the movable block becomes longer, and the rotation angle required to drive the contact mechanism section becomes smaller. As a result, the frictional resistance at the shaft portion of the movable block is reduced, the operating characteristics are stabilized, and the friction at the shaft portion, etc. is reduced.

In particular, since the rotation radius of the drive section provided on the movable block becomes long, the drive section abuts the movable contact piece of the contact mechanism section almost perpendicularly, eliminating rubbing.

Therefore, the frictional resistance of the movable block is reduced, the operating characteristics are further stabilized, and wear is reduced.

Furthermore, as the rotation radius of the movable iron piece becomes longer, the rotation angle of the movable block becomes smaller, so that the movable iron piece reciprocates in a substantially parallel state to the magnetic pole face of the iron core, making surface contact therewith. This has the effect of reducing magnetic resistance and improving magnetic efficiency.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings of FIGS. 1 to 8.

The electromagnetic relay according to this embodiment roughly includes a base 1, an electromagnet section 2, a contact mechanism section 3.4, a movable block 6,
It consists of a cover 7.

The base 1 has a substantially elongated box shape, and has opposing sides and walls 1a.
Standoffs 10a and 10b are provided on the outer surfaces of the and lb, respectively, and one side wall 1a is provided with a pair of notches 11, 11, while the other side wall tb is provided with a pair of parallel guides. Grooves 12a and 12b are provided.

On the other hand, the inner edges of the opposing side walls 1c and ld are provided with a stepped portion 10c for fitting a cover 7, which will be described later.

10c are provided respectively.

Further, the base l has a pedestal part 13 projecting from the substantially central part of the bottom surface thereof and having a positioning step part 13a, and a press-contact step part 15 is provided at the corner of the side wall 1a.

The opposing side walls 1c and ld have a pair of locking ribs 14a and 14b protruding from opposing positions, respectively, and the locking bone is the portion 14a.

A reinforcing rib 14c is provided protrudingly between each of the ribs 14b.

Further, a partition wall 16 is provided protruding near the inner side of the side wall 1b,
The side wall 1b and the partition wall 16 form a seal groove 12c. This seal groove 12c is partitioned by a partition portion 16a provided on the outer surface of the partition wall 16 and having a substantially trapezoidal front surface (FIG. 6).

Providing the partition portion 16a has the advantage that the amount of sealant to be filled can be saved and that the sloped surface thereof improves the flow of the sealant and improves workability.

Further, the partition wall 16 has the guide groove portions 12a, 12
Grooves 16b and 16c are provided in the vertical direction at positions corresponding to b.

Next, the bearing has a protrusion 1 near the inner side of the partition wall 16.
7, and the partition wall 16 and the bearing form a sealant inflow prevention groove 12d with a protrusion 17. In this bearing, the protrusion 17 is provided with a shaft hole 17a for rotatably supporting a movable block 6, which will be described later, and in which movable contact pieces 31, 41 and fixed contact pieces 32, 42, which will be described later, are respectively inserted. Groove portions 17b, 17d, 17c,
7e is provided.

On the other hand, a reinforcing rib portion 18 is protruded between the pedestal portion 12 and the protrusion 17 of the bearing. This reinforcing rib part 1
A gas vent hole 18a passes through the center of the 8th
figure). A caulking protrusion 18b is formed on the outer edge of this gas vent hole 18a, and this caulking protrusion 1
An annular recess 18c is provided at the base of 8b.

Further, the base l is provided with a pair of insulating walls 1 such that the bearing extends from both sides of the protrusion 17 to the reinforcing rib 18.
9a and 19b are integrally provided.

The electromagnet part 2 consists of a spool 21, an iron core 25, a coil 26, a yoke 27, and coil terminals 28 and 29.

The spool 21 has a body 2 having flanges 22 and 23 at both ends.
4 through which an iron core 25 with a rectangular cross section is inserted. Coil terminals 28 and 29 with barbed parts 28a and 29a are insert-molded in one of the collar parts 22, and locking parts 22a (the locking part on the back side in FIG. 1 is (not shown), and the other collar portion 23 is provided with locking portions 23a, 23a on both end surfaces thereof, and has a positioning tip portion 23b protruding from the lower end of the outer surface.

The iron core 25 is inserted into the through hole of the body portion 24, and one protruding end is caulked and fixed to the through hole of the rear end upright piece 27a of the yoke 27, and the other protruding end is inserted into the magnetic pole portion 25.
It is a. This magnetic pole part 25a has magnetic shielding plates 20a and 20b attached to both sides thereof, and faces each of the cut and raised pieces 27b and 27c of the yoke 27 at a predetermined interval.

Note that both side surfaces of the positioning tip 23b of the spool 21 are press-fitted and fixed between the cut and raised pieces 27b and 27c of the yoke 27.

The coil 26 is wound around the body 24 of the spool 21,
The lead wires are tied to the tangled portions 28a and 29a of the coil terminals 28 and 29, respectively, and soldered.

In this embodiment, the length of the protruding terminal portion 29b of the coil terminal 29 is longer than the protruding terminal portion 28 of the coil terminal 28.
Since it is longer than the length b, it has the advantage that it can be easily positioned and mounted on a printed circuit board (not shown).

Then, the electromagnet section 5 having the above-mentioned configuration has the above-mentioned base l.
By positioning and press-fitting it above the base l, it becomes integrated with the base l.

At this time, the locking portions 22a and 23a provided on the collar portions 22 and 23 of the spool 21 are connected to the locking ribs provided on the base 1.
4a and 1' and 4b, the position is regulated in the vertical direction (Fig. 7). Further, the positioning tip 23b of the spool 21 fits into the step 13a of the pedestal 13 provided on the base 1, and the rear end upright piece 27a of the yoke 27 comes into pressure contact with the pressure step 15 provided on the base 1. Therefore, the position is restricted in the front-rear direction and the lateral direction.

At this time, since the seal groove 12e is formed between the flange 22 and the side wall 1a of the base 1, there is an advantage that the space of the base 1 can be saved and the device can be made smaller.

Moreover, in this embodiment, the electromagnet part 2 can be attached to the base l with a single touch, so there is an advantage that assembly is convenient.

The contact mechanism parts 3.4 are provided on both sides of the iron core 25 along an extension line of the axis of the iron core 25 so as to face each other.

The contact mechanism section 3 consists of a movable contact piece 31 and a fixed contact piece 32, and the movable contact piece 3.1 is divided into two parts in the width direction, each of which has a movable contact 31a near its tip, and is prevented from being pulled out. In order to achieve this, the intermediate portion 31c is bent, and the rear end portion is a terminal portion 31b.

On the other hand, the fixed contact piece 32 has a fixed contact 32a at its tip.
The middle part 32c is bent in order to prevent removal, and the rear end part is a terminal part 32b.

The contact mechanism 4 consists of a movable contact piece 41 and a fixed contact piece 42. The movable contact piece 41 is divided into two parts in the width direction, and a movable contact 41a is provided at each end near the tip. The portion 41c is bent, and the rear end portion is a terminal portion 41b.

On the other hand, the fixed contact piece 42 has a fixed contact 42a at its tip.
The intermediate portion 42c is bent to prevent removal, and the rear end portion is a terminal portion 42b.

As shown in FIG. 3, the movable contact piece 31.4
The bent intermediate portions 31c and 41c of 1 are fitted into the sealant inflow prevention groove 12d, and the bearing is fitted into the grooves 17b and 17d provided in the protrusion 7 and the groove 1 provided in the partition wall 16.
6b and 16c, respectively, into the guide grooves 12. a,
After the terminal portions 31b and 41b are respectively projected from the terminal portion 12b, the spacer 5 having a U-shaped planar path is fitted into the sealant inflow prevention portion 11112d from above, so that the arm portions 5a and 5b are connected to the groove portions 16b and 16c. Guide groove 12
a and 12b, respectively, to prevent leakage of the sealant and to provide insulation.

Next, the bent intermediate portion 32c of the fixed contact piece 32.42
, 42c are fitted into the sealant inflow prevention grooves 12d, and the bearings are inserted into the grooves 17c and 17e provided on the protrusion 17 and the grooves 16b and 16c provided on the partition wall 16, respectively, and the bearings are inserted into the guide grooves 2a.

When the terminal parts 32b and 42b are respectively projected from the terminal part 12b, the assembly of the contact mechanism part 3.4 is completed.

At this time, the movable contact 31a of the contact mechanism section 3, the fixed contact 3
2a and a movable contact 41a of the contact mechanism section 4.

The fixed contacts 42a face each other so as to be able to approach and separate.

According to this embodiment, the terminal portion 41b protruding from the side wall 1b
, 42b are longer than the terminal portions 31b, 32b, which has the advantage of being easier to position and attach to a printed circuit board (not shown).

Further, coil terminals 28.29 protrude from the side wall 1a, while movable contact pieces 31.41 and fixed contact pieces 32, 4
2 protrudes from the side wall 1b opposite to the side wall 1a, which has the advantage of providing high insulation.

Further, an insulating wall 19 is provided between the movable contact piece 31 and the fixed contact piece 32 and between the movable contact piece 41 and the fixed contact piece 42.
Since a and 19b are provided in a protruding manner, there is an advantage that insulation is high.

The movable block 6 has a substantially T-shaped planar shape, and a pair of movable iron pieces 63a and 63b that sandwich a permanent magnet 62 are insert-molded into a wide drive portion 61 located near the tip, and a pair of movable iron pieces 63a and 63b are insert-molded at the rear end. A shaft portion 64 is provided as a center of rotation. Further, the drive section 61 is provided with slits 61a and 61b on both sides thereof, respectively.

Therefore, the shaft hole 17 provided in the base 1 includes the shaft portion 64.
a from above, and the slit 61a,
When the tips of the movable contact pieces 31 and 41 are inserted into the respective movable contact pieces 61b, the movable iron pieces 63a and 63b align with the magnetic pole portion 25a of the iron core 25 and the cut and raised pieces 27b and 27c of the yoke 27.
They are positioned between each other and can make contact with each other.

According to this embodiment, since the drive section 61 is located between the electromagnet section 2 and the contact mechanism section 3.4, the insulation properties are high, and the main body of the movable block 6 is located between the contact mechanism section 3 and the contact mechanism section 3.4. Since it is located between the part 4 and the part 4, it has the advantage of high insulation.

The cover 7 has a planar shape that covers the opening of the base l, has a tapered surface 71 at its upper edge, and has a notch 11.1 of the base l on one side end surface.
A claw portion 72, 72 having a shape that can be fitted into one is integrally provided.

Therefore, when the cover 7 is fitted to the stepped portions 10c, 10c of the base 1, an annular groove is formed between the opening edge of the base l and the tapered surface 71 of the cover 7, and the claw portions 72 of the cover 7. 72 closes the cutout portions 11,1.

Then, when the sealant 8 is injected along the tapered surface 71, the sealant 8 flows into the seal groove 12e, solidifies, and seals the base of the coil terminal 28, 29, and flows into the seal groove 12c, solidifies, and becomes movable. The bases of the contact pieces 31, 41 and fixed contact pieces 32, 42 are sealed.

In this embodiment, since the barbed portions 28a, 29a of the coil terminals 28, 29 located within the seal groove 12e are fixed with the sealant 8, there is an advantage that disconnection of the coil 26 due to vibration can be prevented.

Furthermore, since the sealant inflow prevention groove 12d is provided at a position adjacent to the seal groove 12c, the sealant 8 cannot penetrate deep into the base l, and does not adhere to the movable parts inside. Therefore, there is an advantage that malfunctions due to adhesion of the sealant 8 can be prevented.

Furthermore, according to this embodiment, a plurality of sealing surfaces (side walls 1a, 1b and cover 7) that require injection of sealant 8 can be sealed by injecting sealant 8 only once. It has the advantage of good work efficiency.

Next, after suctioning the internal gas through the gas vent hole 18a provided on the bottom surface of the base 1, the caulking protrusion 18b is caulked and sealed, thereby completing the assembly work.

According to this embodiment, the gas vent hole 18m is connected to the reinforcing rib 18.
Since the base l is provided in the base l, there is an advantage that the base l will not be destroyed even if ultrasonic caulking or the like is performed.

The operation of the electromagnetic relay configured as described above will be explained.

3 and 7 show a neutral state. In the case of non-excitation, the magnetic force of the permanent magnet 62 causes the movable iron piece 63a to cut and raise the yoke 27 and the movable iron piece 63b to the magnetic pole part of the iron core 25. 25a through the magnetic shielding plate 20b,
It constitutes a magnetic circuit.

At this time, the movable contact 31a of the movable contact piece 31 is separated from the fixed contact 32a of the fixed contact piece 32, while the movable contact 41a of the movable contact piece 41 is in contact with the fixed contact 42a of the fixed contact piece 42. There is.

Next, when the coil 26 is excited to cancel the magnetic flux of the permanent magnet 62, the movable iron pieces 63a and 63b repel the cut-and-raised piece 27b of the yoke 27 and the magnetic pole part 25a of the iron core 25, respectively. The movable block 6 rotates in the clockwise direction in FIG. The magnetic pole part 25a and the cut-and-raised piece 27c of the yoke 27 are respectively attracted to form a magnetic circuit. As the movable block 6 rotates, the movable contact 31a
contacts the fixed contact 32a, and the movable contact 41a
is separated from the fixed contact 42a.

Then, even if the excitation is removed, the movable block 6 maintains its state due to the magnetic force of the permanent magnet 62.

Then, when the coil 26 is excited in a direction opposite to the above-mentioned excitation direction, the movable block 6 rotates in the opposite direction to the above-mentioned direction, switches the contact again, and returns to the original state.

According to this embodiment, since the distance from the shaft portion 64 serving as a rotation fulcrum to the drive portion 61 is long, the rotation angle of the movable block 6 that drives the contact mechanism portion 3.4 is small. Therefore, the frictional resistance generated between the shaft portion 64 and the shaft hole 17a is reduced, the operating characteristics are stabilized, and the wear of the shaft portion 64 is reduced.

Furthermore, since the rotation angle of the movable block 6 is small, the drive portion 61 presses the movable contact piece 31, 41 at a substantially right angle. Therefore, the drive section 61 does not rub the movable contact piece 31.41. As a result, the frictional resistance is reduced, the operation becomes even more stable, and the wear of the drive section 61 is reduced.

Furthermore, the movable iron pieces 63a and 63b are arranged to cut and raise the magnetic pole portion 25a of the iron core 25 and the cut and raised pieces 27b and 27c of the yoke 27.
almost surface contact with. Therefore, the magnetic resistance becomes smaller,
Improves magnetic efficiency.

Further, for example, even if the movable contact 31a is welded to the fixed contact 32a, since the tip of the movable contact piece 31 is inserted into the slit 61a of the movable block 6, the drive unit 61 forcibly separates the contact. Therefore, there is an advantage that inoperability due to welding of the contacts can be prevented.

Although the present embodiment has been described with reference to the case where a plurality of horizontal mechanism sections are provided, the present invention is not necessarily limited to this, and it goes without saying that a negative set of contact mechanism sections may be provided.

[Brief explanation of drawings]

1 to 8 show an embodiment according to the present invention,
Figure 1 is an exploded perspective view, Figure 2 is a plan view after assembly, Figure 3 is a plan view before assembly, and Figure 4 shows only the casing cut along line 1'/-IV in Figure 2. Figure 5 is a left side view, Figure 6 is a right side view, and Figure 7 is a cross-sectional view of Figure 2.
(2) A line sectional view, FIG. 8 is a cross-sectional view of the case, and FIG. 9 is a perspective view showing an embodiment according to the conventional example. 2... Electromagnet part, 6... Movable block, 25...
Iron core, 25a...Magnetic pole part, 26...Coil, 61.
... Drive unit, 63a, 63b... Movable iron piece, 64...
・Shaft part. Patent applicant: Tateishi Electric Co., Ltd. Agent: Patent attorney: Two idiots, blue and white Figure 5 $611 1. -7 High school 7th figure a18 figure Z1530 (:4Ole$0 16C 9th
1! l

Claims (1)

[Claims] (1) An electromagnet part with one end of the iron core around which the coil is wound as a magnetic pole part, and a movable iron piece arranged so as to be able to come into contact with and separate from the magnetic pole part of the iron core at the tip part, and excite and demagnetize the coil. In an electromagnetic relay in which a movable block that rotates based on and drives a contact mechanism section is disposed on the same straight line, a drive section that drives the contact mechanism section is provided near the tip of the movable block, and a drive section that drives the contact mechanism section is provided near the tip of the movable block, and An electromagnetic relay characterized by having a shaft portion serving as a rotation center.