JPS6259407B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a polarized relay.

Conventionally, in polarized relays, it has been difficult to attach a movable iron plate, and the impact or noise generated when the movable iron plate and the permanent magnet are attracted to each other has been large.

The present invention aims to eliminate the above-mentioned drawbacks and provide a polarized relay that reduces the impact and noise generated when a movable iron plate and a permanent magnet are attracted to each other.

The present invention will be explained below with reference to the drawings.

In FIGS. 1 to 3, reference numeral 1 denotes a cylindrical coil bobbin around which a coil 2 is wound, and has a first protrusion 3 for fixing the yoke on one end surface, and second protrusions 4 for fixing the permanent magnet. , third protrusion 5 for fixing the buffer rubber,
5, and spring contacts 6, 6 formed on the outer edges of the third protrusions 5, 5, respectively, and connected to both ends of the coil 2. Reference numeral 7 denotes a U-shaped yoke in which one wing is fitted and fixed to the first protrusion 3 of the coil bobbin 1 through a fixing groove 8, and the base thereof is on the outer peripheral side of the coil 2 wound around the coil bobbin 1 . The coil bobbin 1 is arranged in the axial direction thereof, and the other wing extends along the other end surface of the coil bobbin 1 . Reference numeral 9 denotes a movable iron plate inserted into the hole 10 of the coil bobbin 1 , and in the illustrated state, the upper end extends near the side surface of the free end 11 of one wing of the yoke 7 , which is bent and extended in the axial direction of the coil bobbin 1 . The lower end is bent and the bent groove portion 1 of the other wing of the yoke 7
2, and the movable iron plate 9 is inserted into the movable iron plate 9 with this lower end as a fulcrum.
is able to swing freely. Reference numeral 13 denotes a cylindrical rod, which is disposed in the bent groove portion 12 and is connected to the movable iron plate 9.
After engaging the other end, the coil bobbin 1 and the yoke
7 and the other end of the movable iron plate 9, thereby smoothing the rocking movement of the movable iron plate 9 and preventing it from coming off. A permanent magnet 14 has one pole surface in contact with the second protrusions 4, 4 of the coil bobbin 1 , and is opposed to the side surface of the free end 11 of one wing of the yoke 7 via the upper end of the movable iron plate 9. ing. A buffer rubber 15 is inserted between the other pole surface of the permanent magnet 14 and the third projections 5, 5. Reference numeral 16 denotes a storage box main body, and locking grooves 18, 18 are formed on the inner side of the corresponding wall surfaces, into which protrusions 17, 17 protruding from both side edges of the base of the yoke 7 are fitted, and on the bottom surface thereof, locking grooves 18, 18 are formed. A recess 19 fitted into the outer surface of the bent groove 12 and a rib 20 protruding between the locking grooves 18, 18 and the recess 19 and abutting the outer surface of the other wing of the yoke 7 .
is formed. Reference numeral 21 denotes an insulating plate, which is fitted into the opening of the storage box main body 16 , and presses and fixes the permanent magnet 14 and the buffer rubber 15 on one side. Reference numeral 22 denotes a movable frame, and protrusions 23 and 24 extend through holes 25 of the insulating plate 21 to both sides of one end of the movable iron plate 9, and as the movable iron plate 9 swings, the yoke 7 It moves in the notch 26 of the free end 11 of one wing, the notch 27 of the permanent magnet 14, and the notch 28 of the buffer rubber 15. 29, 29,
Reference numerals 30 and 30 denote movable contacts disposed on the movable frame 22, which are fitted into the opening of the storage box main body 16 as the movable iron plate 9 swings and, in turn, as the movable frame 22 swings. A fixed contact provided on the cover 31 is contacted. Reference numerals 32 and 33 are contact springs, which are connected to the movable contacts 29 and 2 in the movable frame 22.
Appropriate contact pressure is applied to 9, 30, and 30. 3
Fixed terminals 4, 34, 35, and 35 project outward from the cover 31, respectively, and are connected to fixed contacts provided on the cover 31. Coil terminals 36, 36 are respectively projected outward from the cover 31, and are pressed into contact with the spring contacts 6, 6 through holes 37, 37 of the insulating plate 21. Reference numeral 38 denotes a hole bored in the side wall of the cover 31, through which the movable frame 2
2 is prevented from colliding with the side wall of the cover 31 during movement. 39, 39, 40, 40
After fitting the cover 31 to the storage box main body 16 , the engaging protrusions formed on the sides of the storage box main body 16 and the cover 31 are engaged and fixed with each other by E-rings.

When an excitation current is applied to the coil 2, the movable iron plate 9 is moved to the side surface of the free end 11 of one wing of the yoke 7 . The movable frame 2 moves as the movable iron plate 9 moves.
2 is moved in the A direction. As a result, the movable contacts 29, 29, 30, and 30 of the movable frame 22 are brought into contact with the fixed contacts of the cover 31. On the other hand, when the excitation current of the coil 2 is cut off, the movable iron plate 9 is attracted and moved to one pole surface of the permanent magnet 14. As the movable iron plate 9 moves, the movable frame 22 is moved in the B direction. As a result, the movable contacts 29, 29, 30, and 30 of the movable frame 22 are separated from the fixed contacts of the cover 31.

In the illustrated embodiment described above, (a) one bent end of the movable iron plate and the cylindrical rod are inserted into the bent groove of the other wing of the yoke, so that the movable iron plate can be easily attached or prevented from coming off. .

(b) Since the fixing groove of the yoke blade is fitted and fixed to the first protrusion of the coil bobbin, and the permanent magnet facing the free end of the yoke blade is fixed in contact with the second protrusion of the coil bobbin, the yoke A predetermined distance between the free end of one blade and the permanent magnet can be secured (c) Since the buffer rubber is inserted between the permanent magnet and the third protrusion of the coil bobbin, the distance between the free end of one blade and the permanent magnet can be set and maintained. The shock received by the permanent magnet is absorbed by the buffer rubber, which in turn effectively prevents damage to the permanent magnet. (e) A notch through which the protrusion of the movable frame passes is formed in the free end of the yoke wing, the permanent magnet, and the buffer rubber, making it possible to achieve miniaturization.

As described above, according to the present invention, the base is disposed on the outer peripheral side of the coil 2 and in the axial direction on the outside of the cylindrical coil bobbin 1 around which the coil 2 is wound, and the base is disposed on the outer peripheral side of the coil 2 in the axial direction, and the base is disposed on the outer peripheral side of the coil 2 and in the axial direction, and A U-shaped yoke 7 is provided in which one wing and the other wing are arranged on one end surface and the other end surface side of the coil bobbin 1, and a bent groove portion 12 is formed in one wing of the yoke 7 , and the coil bobbin is formed in the bent groove portion 12. The lower end of the movable iron plate 9 inserted into the hole 10 of the movable iron plate 9 is swingably provided, and the permanent magnet 14 is opposed to the free end 11 formed on the other wing of the yoke via the upper end of the movable iron plate 9. The upper end of the iron plate 9 is engaged with the movable frame 22, and a fixing groove 8 is bored in the other wing of the yoke 7 ,
a second projection in which the fixing groove 8 is fitted into the first protrusion 3 formed on the coil bobbin 1, and the permanent magnet 14 and the buffer body 15 are formed on the coil bobbin;
Since it is inserted and fixed between the third protrusions 4 and 5, the shock and noise received by the permanent magnet due to the swinging of the movable iron plate are absorbed by the cushioning rubber, which in turn effectively prevents damage to the permanent magnet. There are benefits to be gained.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of an embodiment of the polarized relay of the present invention, FIG. 2 is a cross-sectional view of the same, and FIG. 3 is a top view of the same. 1 ... Coil bobbin, 2... Coil, 3, 4,
5...Protrusion, 6...Spring contact, 7 ...Yoke, 8
... Fixing groove, 9 ... Movable iron plate, 10 ... Hole, 1
DESCRIPTION OF SYMBOLS 1... Free end of one wing of yoke, 12... Curved groove of other wing of yoke, 13... Cylindrical rod, 14... Permanent magnet, 15... Buffer rubber, 16 ... Storage box body, 1
7... Protrusion, 18... Locking groove, 19... Recess, 2
0...Rib, 21...Insulating plate, 22...Movable frame,
23, 24... protrusion, 25... hole, 26, 27,
28... Notch, 29, 30... Movable contact, 31
...Cover, 32, 33...Contact spring, 3
4, 35...Fixed terminal, 36...Coil terminal, 3
7, 38... hole, 39, 40... E ring.

Claims (1)

[Claims] 1. A cylindrical coil bobbin 1 around which a coil 2 is wound.
A coil whose base portion is disposed on the outer peripheral side of the coil 2 in the axial direction thereof, and one wing and the other wing formed at both ends of the coil bobbin 1 are disposed on one end surface and the other end surface of the coil bobbin 1, respectively. letter-shaped yoke
7 , a bending groove 12 is formed in one wing of the yoke 7 , and the coil bobbin 1 is inserted into the bending groove 12.
The lower end of the movable iron plate 9 inserted into the hole 10 is swingably provided, and a permanent magnet 14 is attached to the free end 11 formed on the other wing of the yoke via the upper end of the movable iron plate 9.
are placed opposite each other, and the upper end of the movable iron plate 9 is connected to the movable frame 2.
2, a fixing groove 8 is bored in the other wing of the yoke 7 , the fixing groove 8 is fitted with the first protrusion 3 formed on the coil bobbin 1, and the permanent magnet 14 and a buffer body 15 are inserted and fixed between second and third protrusions 4 and 5 formed on the coil bobbin. 2. The lower end of the movable iron plate and the cylindrical rod are inserted into the bent groove of one wing of the yoke, and the vicinity of the lower end of the movable iron plate is bent.
Polarized relay as described in section. 3 Notches 2 that engage with the upper end of the movable iron plate 9 and allow the protrusions 23 and 24 of the movable frame 22 to pass through.
6 and 27 are formed on the one wing free end 11 of the yoke 7 , the permanent magnet 14, and the buffer rubber 15.