JPH0412577B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to the structure of a polarized relay.

[Background technology]

Generally, a movable iron core is loosely fitted into a coil frame around which a coil is wound, and when the coil is energized, the movable iron core is attracted to a yoke that forms a magnetic path, and the card is attached to the movable iron core. In a relay that opens and closes the contact at the There was a problem that there was no. Also, the yoke and
Since the contact portions and the coil terminals are also disposed close to each other on the body, there is a problem in that it is not possible to maintain a high withstand voltage between them.

[Purpose of the invention]

The present invention has been provided in view of the above-mentioned points, and provides a relay structure whose purpose is to improve the withstand voltage between the coil and the contact portion.

[Disclosure of the invention]

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
In FIGS. 1 to 4, reference numeral 2 denotes a rectangular cylindrical coil frame made of an insulating material, and a central body 2a of the coil frame 2.
A coil 1 is wound around. An insertion hole 18 with both ends open is formed in the coil frame 2, and the movable iron core 5 is loosely fitted into the insertion hole 18. A support spring 19 is attached to one side of the substantially T-shaped base of the movable iron core 5, and a protrusion 20 that serves as a pivot point is integrally protruded from the other side. Locking grooves 21 are cut into the upper and lower surfaces of the tip of the movable iron core 5, respectively. When the movable iron core 5 is housed in the insertion hole 18 of the coil frame 2, the base and tip of the movable iron core 5 are respectively projected outward. Reference numeral 9 denotes a card made of an insulating material that opens and closes the contacts, and a through hole 22 is bored in the center of the card 9. A pair of arms 23, 23 are integrally provided on the front side of the upper and lower portions of the through hole 23, and locking gourds 23a are provided on the distal ends of the arms 23 to protrude from opposite sides. Furthermore, slits 24 are formed on both sides of the card 9 and open at the bottom. The card 9 is attached to the tip of the movable iron core 9 as shown in FIG. It will be fixed to the core 5. Reference numeral 4 designates a pair of yokes, one of which is L-shaped, and the other yoke 4B is U-shaped. Reference numeral 6 denotes a body made of an insulating material, and the yoke 4 is arranged on the bottom surface of the recess 25 of the body 6. 3 is a permanent magnet, and this permanent magnet 3 is placed in the recess 25 between both yokes 4A and 4B. Reference numeral 10 denotes an inner frame made of an insulating material, which is formed into a box shape with an open top surface.
The coil frame 2 is housed inside the coil frame 2. One end of the inner frame 10 is formed with an opening 27 that is completely open, and the other end is formed with a notch 26 whose upper end is open. Flange portions 28 and 29 are provided at both ends of the coil frame 2.
are formed, and the flanges 28 and 29 are fitted into the notch 26 and opening 27 of the inner frame 10, respectively. Reference numeral 16 denotes an insulating wall formed integrally with the flange 29 of the coil frame 2, and coil terminal plates 30 are implanted on both sides of the insulating wall 16, one end of which is connected to the coil 1, and the other end of which is connected to the outside. ing. This insulation wall 1
The inside of 6 is hollow, and covers the base of the movable iron core 5 and one end of the yoke 4. When the coil frame 2 is housed in the inner frame 10, as shown in FIGS. 2 and 3, the insulating wall 16
It becomes a state that is more prominent than 0. In other words, the movable iron core 5
Both ends thereof protrude from the inner frame 10. The pivot piece 31 protruding above one end of the yoke 4B and the base of the movable iron core 5 are located in the space 32 in the insulating wall 16 of the coil frame 2, as shown in FIG. The protrusion 20 of the core 5 is on the side of the pivot piece 31 of the yoke 4B,
Support spring 19 springing from the inner surface of insulating wall 16
The movable iron core 5 is biased by the movable iron core 5. Further, the tip of the movable iron core 5 is located between the suction pieces 33 and 34 of the yoke 4, and the tip of the movable iron core 5 is located between the suction pieces 33 and 34 with the pivot portion as a fulcrum.
4 will be attracted alternately.

By the way, the coil frame 2 and the inner frame 10 are fixed as follows. That is, as shown in FIG. 2, a rib 35 is integrally provided on the lower surface of the top plate of the case 7, which is covered with the upper surface of the body 8, and the ribs 35 are fixed with an engaging portion between them. A groove 13 is formed. A substantially semicircular reservoir 36 is formed in a part of the fixing groove 11 . On the other hand, a fixing piece 14 that fits into the fixing groove 13 is integrally formed to protrude from the upper ends of both flanges 28 and 29 of the coil frame 2.
Furthermore, the ribs 35 are provided on both sides of the inner surface of the case 7.
A side groove 11 is formed with a rib 35' integrally formed with the fixing groove 13, and communicates with the fixing groove 13. The lower surface (upper surface in FIG. 2) of the side gutter 11 is open. Engagement pieces 12 are integrally formed on both sides of the inner frame 10 on the opening 27 side to protrude over the entire length in the vertical direction, and the engagement pieces 12 fit into the side grooves 11. be. By dropping adhesive 37 into the reservoir 36 of the case 7, allowing the adhesive 37 to flow into the fixing groove 13, and then inserting the body 6 on which the coil frame 2 and the inner frame 10 are arranged into the case 7. The fixing piece 14 of the coil frame 2 is fitted into the fixing groove 13, and the adhesive 37 is cured, thereby fixing the coil frame 2 to the case 7. Also, at this time, the engagement piece 12 of the inner frame 10
The upper end of the inner frame 10 is fitted into the fixing groove 13', thereby fixing the inner frame 10 to the case 7. In this case, it goes without saying that the adhesive 37 may be used for fixing.

On the other hand, insulating plates 17 having an L-shaped cross section are integrally provided upwardly projecting from the upper surface of the body 6 at four corners around the recess 25 in which the yoke 4 and the like are housed. These pair of insulating plates 17a, 17a cover the side part of the pivot portion of the yoke 4 or the insulating wall 16, and
The other pair of insulating plates 17b, 17b cover the adsorption pieces 33, 34 of the yoke 4. Coil terminals 1 are provided on the body 6 on both sides of these insulating plates 17.
5. An operating spring terminal 38 and a fixed terminal 39 are respectively implanted. That is, the coil terminal 15 is arranged on the outer side of the insulating plate 17a, and the fixed terminal 39 is arranged on the other insulating plate 17b. The tips of each of these terminals 15, 38, and 39 protrude from the lower surface of the body 6 for connection to the outside. Further, the base of a flat plate-shaped operating spring 8 is fixed to the operating spring terminal 38, and a movable contact 41 that faces a fixed contact 40 fixed to the fixed terminal 39 is fixed to the tip of the operating spring 8.

FIG. 4a shows a state in which the coil 1 is not energized, and the magnetic flux of the permanent magnet 3 passes through the magnetic path of the movable iron core 5, the yoke 4B, and the adsorption piece 34, so that the coil 1 is not energized. The tip of the iron core 5 is the suction piece 3
4 and becomes the state shown in Figure 4a. Therefore, as the tip of the movable iron core 5 is attracted by the suction piece 34, the card 9 attached to the movable iron core 5 presses the operating spring 8 in the upward direction in FIG. 4a, and the movable contact 41 presses the fixed contact 40 and both contacts 40,
41 is closed. In addition, other contacts 40, 4
1, since the operating spring 8 is disposed within the slit 24 of the card 9, the operating spring 8 is driven upward in the figure together with the card 9 and is opened. Next, when the coil 1 is energized, the magnetic flux by the coil 1 is formed in the opposite direction to the magnetic flux of the permanent magnet 3,
The suction force between the movable iron core 5 and the suction piece 34 is greater than the suction force between the other suction piece 33, so that the movable iron core 5 is attracted to the suction piece 33. At this time, the movable iron core 5 rotates about the protrusion 20 as a fulcrum. Therefore, in this state,
As the movable iron core 5 rotates, the card 9 moves downward in FIG.
0,41 will be opened. Next, when the current supply to the coil 1 is stopped, the magnetic flux of the permanent magnet 3 restores the original state shown in FIG. 4a. By the way, the coil terminal 15 and the coil 1 are isolated from the pivot portion of the yoke 4 by an insulating wall 16 formed on the coil frame 2 and an insulating plate 17a, and the fixed contact 40, movable contact 41, etc. are connected by an insulating plate 17b. Since it is isolated from the adsorption pieces 33 and 34 of iron 4, the withstand voltage between them is improved.

5 and 6 are diagrams showing the terminal treatment of the coil 1 and the connection with the coil terminal 15. The upper end of the coil terminal 15 implanted in the body 6 has two
A book slit is inserted from above, the central piece is bent outward to form a fixed piece 42, and guide pieces for guiding the coil terminal plate 30 protruding from the coil frame 2 on both sides of the fixed piece 42 when inserted. 43. On the other hand, the coil terminal plate 30 that is formed to protrude outward from the coil frame 2 has a winding part 44 with both ends cut into a semicircular shape on the base side, and a fixing piece 42 and welded on the tip side. A welded portion 45 for fixing is formed. A guide groove 46 for guiding the coil end 1a is cut into the upper end of the insulating wall 16 of the coil frame 2, and the coil end 1a of the coil 1 is inserted into the guide groove 46, and the coil end 1a is connected to the coil terminal. It is wound around the winding portion 44 of the plate 30. Insert the coil terminal plate 30 of the coil frame 2, in which the coil 1a has been terminal-treated, along the guide piece 43 of the coil terminal 15, place the coil terminal plate 30 on the fixing piece 42, and attach the welded portion 45. and the fixing piece 42 are welded together by, for example, resistance welding. By the way, the hatched portion of the coil terminal plate 30 shown in FIG.
By using Sn-plated or solder-plated material and joining the coil ends 1a by welding, the coil ends can be processed without soldering, and there is no concern about contamination due to flux. Further, by forming a projection on the welding portion 45 or the fixed piece 42, the reliability of welding is improved. Thus, by reducing or eliminating the use of solder and flux, relay reliability is improved by eliminating flux contamination.
In addition, by incorporating the coil frame 2 into the body 8 side, the coil terminal plate 30 and the coil terminal 15 are automatically connected to each other.
The position of the joining part is determined, resistance welding can be easily performed, and assembly workability can be improved and costs can be reduced.

〔Effect of the invention〕

As described above, the present invention has a box-shaped inner frame with an open top surface that stores the coil frame inside and allows both ends of the movable iron core to protrude outside, and has side grooves formed on both sides of the inner surface of the case. Engagement pieces that engage with the inner frame are provided protruding from both sides of the inner frame, and a fixation piece that fits into the fixation groove provided on the bottom surface of the top plate of the case is formed on the top surface of the coil frame. By fitting the fixing piece into the fixing groove on the upper surface of the top plate of the case, storing the coil frame in the inner frame, and fitting the engaging piece of the inner frame into the side groove on the inner surface of the case, the coil frame By insulating the coil wound around the coil from contacts, yoke, and other members, it is possible to improve the withstand voltage with these members, so-called the withstand voltage between input and output. The inner frame prevents gas from diffusing to other members, eliminates dirt on the contact surfaces, and improves the contact reliability of the contacts.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view of an embodiment of the present invention, Fig. 2 is a broken perspective view of the same case, Figs. c is a plan sectional view, a side sectional view, and a front sectional view of the same as above, FIG. 5 is an enlarged perspective view of a main part of the same, and FIG. 6 is an enlarged plan view of a main part of the same. 1 is a coil, 2 is a coil frame, 3 is a permanent magnet, 4
is the yoke, 5 is the movable iron core, 6 is the body, 7 is the case, 8 is the operating spring, 9 is the card, 10 is the inner frame, 1
1 is a side groove, 12 is an engaging piece, 13 is a fixing groove, 14 is a fixing piece, 15 is a coil terminal, 16 is an insulating wall, 17
indicates an insulating plate.

Claims (1)

[Scope of Claims] 1. A coil frame around which a coil is wound, a permanent magnet and a pair of yokes disposed outside the coil frame, and a base that is loosely fitted inside the coil frame and has a base connected to said 1.
A movable iron core that is pivotally supported at one end of the pair of yokes and whose tip is attracted to one of the other ends of the pair of yokes by the magnetic flux of a permanent magnet is disposed on the body, and a movable iron core that is A box-shaped case with an open bottom is installed, and a card is attached to the tip of the movable iron core that drives an operating spring to open and close the contacts. In a relay that opens and closes contacts by inverting a movable iron core, the coil frame is housed inside and a box-shaped inner frame with an open top surface from which both ends of the movable iron core protrude to the outside is formed,
Engagement pieces that engage with side grooves formed on both sides of the inner surface of the case are provided protruding from both sides of the inner frame, and fixing pieces that fit into fixing grooves provided on the bottom surface of the top plate of the case are provided on the top surface of the coil frame. A relay structure characterized by forming. 2 An insulating wall that insulates one end of the yoke and the coil terminal embedded in the body is integrally formed with the coil frame, and an insulating plate that insulates the other end of the yoke and the operating spring that opens and closes the contact. The structure of the relay according to claim 1, characterized in that the relay is formed integrally with the body.