JPH09245601A - Electromagnetic relay - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electromagnetic relay which can attach its movable piece easily to a coil block without use of a hinge spring and can operate the movable piece stably. SOLUTION: This relay has a movable piece 50 placed opposite to a coil block so that the ends of the moveable piece 50 face the magnetic pole parts 35 of an iron core 21, with one end of the movable piece 50 being connected to and energized by an operating element 70 energized by the spring force of a contact switching mechanism so that the end is separated from one of the magnetic pole pieces 35 which is opposed to the end, and with the other end of the movable piece 50 placed in a free state and in proximity to the other magnetic pole part opposed thereto.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting structure of a movable piece on a coil block of an electromagnetic relay.

[0002]

2. Description of the Related Art As an electromagnetic relay, for example, Japanese Unexamined Patent Publication No.
There is one such as shown in Japanese Patent No. 242785. Mounting of the movable piece to the coil block in this electromagnetic relay is performed via a hinge spring.By using this hinge spring, positioning of the movable piece to the coil block and rotation at the time of adsorption are possible, and further, When not attracted, the movable piece is biased away from the attracting surface of the magnetic pole portion by its spring force.

[0003]

However, since the electromagnetic relay has been extremely miniaturized in recent years, the hinge spring component thereof is also extremely small, which makes it difficult to assemble it, and if it is too small, its function will be reduced. There is a problem that it is not fully exerted.

The present invention has been made in view of the above circumstances, and makes it possible to easily attach a movable piece to a coil block without using a hinge spring.

[0005]

According to the first aspect of the present invention, the movable piece is arranged relative to the coil block so that the end portions of the movable piece face the magnetic pole portions of the iron core, respectively. Is urged by the spring force of the contact opening / closing mechanism to be urged to separate from one of the opposing magnetic poles, and the other end of the movable piece is freely placed in proximity to the other opposing magnetic pole. It was configured.

According to the above construction, one end of the movable piece is separated from one magnetic pole portion when the coil is not driven, and when the coil is driven, the other end of the movable piece is initially the other magnetic pole portion. And a magnetic circuit is formed by this, so that one end of the movable piece is attracted to one magnetic pole portion against the spring force of the contact opening / closing mechanism. In this way, the operation of the movable piece corresponding to the coil drive is performed without any trouble even if the other end of the movable piece is in the free state.

In order to ensure that the other end of the movable piece is attracted to the other magnetic pole portion at the initial stage of the above coil drive, the other end of the movable piece is arranged in the free state and in proximity to the other magnetic pole portion when not driven. It is preferable that the maintaining means is provided so that the maintaining state is maintained even when there is vibration (the invention according to claim 2), and the maintaining means is, for example, locked to the end surface of the coil block. A first movement blocking body that blocks the movement of the movable piece toward one end, and / or a second movement blocking body that is formed on both sides of the end of the coil block and that blocks the other end of the movable piece from lateral displacement and floating. And / or a third part formed integrally with a base member on which the coil block is mounted and abutting against the other end surface of the movable piece to prevent the movable piece from moving toward the other end side.
A movable block and / or a fourth block that is integrally formed at the other end of the movable piece and adds weight to the other end (invention of claim 3). The displacement of the other end of the movable body in the five directions other than the downward direction in which the end is supported by the other magnetic pole portion and is not displaced in that direction is suppressed.

Further, since the first blocking member and the fourth blocking member are composed of bent pieces (the invention according to claim 4), the structure is simplified.

[0009]

1 is a perspective view showing the overall construction of an electromagnetic relay, FIG. 2 is an exploded perspective view, and FIG. 3 is a bottom view. The case is not shown in FIG. 1, and the coil is not shown in FIG.

The electromagnetic relay is generally composed of a base member 1, a coil block 20, a movable iron piece 50 as a movable piece, a card 70 as an operating body, a contact opening / closing mechanism 80 and a case 1.
00.

The base member 1 is made of synthetic resin and has a base portion 2
And a partition portion 3 arranged substantially parallel to the base portion 2, and the base portion 2 and the partition portion 3 are continuous by a lower side wall (not shown in the figure) as an insulating wall, An upper side wall 5 is integrally provided at a position opposite to the lower side wall. In addition, at both end positions, an end wall 6 having a step shape in the middle and an end wall 8 having an upper portion 7 protruding above the upper side wall 5 are integrally provided. With the above-described configuration, the base member 1 includes the first arrangement space 11 and the second arrangement space 12 which are open on the base portion 2 and the partition portion 3 on different sides. Further, three grooves 13, 14, 15 are formed in the base portion 2, and the central groove 15 extends to the opposite side of the base portion 2. Also, on the side of the base portion 2 where the card 70 is attached, the protruding portion 1 is provided at the center thereof.
8 are formed, and both ends thereof are locking portions 17 to the coil block 20 side.

The coil block 20 is constructed by winding a coil 23 around a bent iron core 21 with a synthetic resin spool 22 in between. The iron core 21 is obtained by punching and bending an iron plate by press molding, and is fitted and mounted on the spool 22 from above. Collar parts 25 and 26 which are located at both ends of the spool 22.
First and second leg portions 27, 2 provided on the collar portion 25 on the one side
Each of the coil terminals 30 is insert-molded and attached to each of the eight. Further, the base member 1 is provided at a position where the lower portions of the first and second leg portions 27 and 28 face each other.
An engaging portion 29 for engaging with the engaging portion 17 is provided.

When the iron core 21 is fitted and mounted on the spool 22, the main body 32 of the iron core 21 is fitted into the fitting groove 33 of the spool 22.
The magnetic pole portion 35 on the side having the attraction surface 34 of the iron core 21 is fitted into the fitting portion 36 formed on one side of the collar portion 25 of the spool 22, and the magnetic pole portion 38 on the other side is fitted into the spool 22. It is performed by being locked to the collar portion 26 on the other side of the. A pair of bent rising pieces 39 are integrally formed on both sides of the flange portion 26 on the other side. Further, on the bottom surface side of the fitting portion 36 of the spool 22, a groove 40 for mounting and locking to the base member 1 having a stepped shape having a different height is formed on the way.

As shown in FIG. 4, an opening 42 is formed on one side of the bottom portion of the fitting portion 36 so as to open at one side of the mounting and locking groove 40, and the magnetic pole is formed through the opening 42. A part of the lower surface 31 of the portion 35 projects slightly and is exposed. In this way, the coil 23 is wound around the spool 22 assembled to the iron core 21,
Both ends thereof are connected to the coil terminals 30, respectively.

The movable iron piece 50 is a plate-like body made of a magnetic material,
A locking projection 51 is provided at one end thereof, and a bending piece 54 having a horizontal projection 52 and an opening 53 is provided at the other end as shown in FIG.

The card 70 is made of synthetic resin, and has a locking recess 7 at the upper end which is locked by the locking projection 51 of the movable iron piece 50.
1 is provided, and a protrusion 72 that is fitted into the locking hole 84 of the movable contact piece 83 of the contact opening / closing mechanism 80 is provided at the lower end portion.

As shown in FIG. 6, the contact opening / closing mechanism 80 is composed of a pair of upper and lower fixed contact pieces 81 and 82 and a movable contact piece 83 arranged between them, and these fixed contact pieces 81 and 82 and the movable contact piece. Contact 8 on each piece 83
5, 86, 87 are attached respectively, and terminal portions 91, 92, 9 are provided on the base portions 88, 89, 90 side respectively.
Each of the three is integrally formed so as to face downward. The movable contact piece 83 has the above-described locking hole 84 at its tip. Further, the lower fixed contact piece 82 has a base 8
9 is provided with a cutout portion 95, and the base portion 8 of the upper fixed contact piece 81 is provided.
The bent portion of 8 is arranged in the cutout portion 95, so that the terminal portion 91 of the bent portion of the terminal portion 9 of the base portion 2 is formed.
It projects on the side opposite to 2, 93.

Next, the assembling construction of the electromagnetic relay having the above construction will be described according to the assembling procedure.

First, the contact opening / closing mechanism 80 is mounted in the first arrangement space 11 of the base member 1 through the opening portion 19. To mount the contact opening / closing mechanism 80, first, the fixed contact piece 82 on the lower side is attached.
And the movable contact piece 83 with the terminal portions 92 and 93 thereof fitted into the grooves 13 and 14 of the base portion 2, and then the upper fixed contact piece 8
1 by inserting the terminal portion 91 into the groove 15 of the base portion 2.

As described above, the lower fixed contact piece 82 has the notch 95 in the base portion 89 thereof, and the upper fixed contact piece 81.
The terminal portion 80 of the groove has a bent shape, and
Since it is configured to extend to the opposite side of the base portion 2, the fixed contact pieces 81, 82 and the movable contact piece 83 can be mounted only from the open portion 19 on one side of the base portion 2, and The terminal portions 91, 92, 93 are spaced apart from each other by a predetermined insulation distance A, B, C, respectively.
A bottom-positioned configuration is obtained.

Then, the coil block 20 is mounted in the second arrangement space 12 of the base member 1. The coil block 20 is mounted by fitting the mounting lock groove 4 of the spool 22.
It is performed in a state in which the one end wall 6 of the stepped shape of the base member 1 is fitted into 0. At this time, as described above, since a part of the lower surface 31 of the magnetic pole portion 35 is exposed by projecting slightly from the opening 42 opened at one side of the bottom portion of the fitting portion 36, as shown in FIG.
As shown in FIG. 2, the lower surface 31 of the magnetic pole portion 35 is placed on the upper side upper surface 4 of the end wall 6, that is, the spool 2
The inner surface of the mounting and locking groove 40 of No. 2 and the upper surface 4 of the end wall 6 on the higher side hardly contact with each other. Also, the magnetic pole portion 3
When the lower surface 31 of 5 is placed on the upper side upper surface 4 of the end wall 6, the inner surface of the mounting locking groove 40 and the lower side upper surface 10 of the end wall 6 hardly come into contact with each other. The size of the spool 22 or the base member 1 is designed.

In this way, the coil block 20 is mounted only on one end side of which the lower surface 31 of the magnetic pole portion 35 is placed on the upper surface 4 on the higher side of the end wall 6.
At the other end of the coil block 20, the lower end of the collar portion 26 is placed on the base member 2. Then, in the mounted state, the locking portion 1 formed on the protruding portion 18 of the base portion 2
7, the locking portions 19 of the first and second leg portions 27 and 28 of the spool 22 are locked, and the coil block 20 is fixed. Then, the movable iron piece 50 and the card 70 are attached to the coil block 20.

First, the projection 72 at the lower end of the card 70 is locked in the locking hole 84 of the movable contact piece 83, and is formed in the locking recess 71 at the upper end of the card 70 so as to project to one end side of the movable iron piece 50. The locking protrusion 51 is locked, and the horizontal protrusion 52 on the other end side of the movable iron piece 50 has the magnetic pole portion 38 on the other side of the iron core 21.
A bending piece 54, which is placed on the top and has an opening 53, is brought into contact with the outer surface of the collar portion 26.

In the above, the card 70 is the movable contact piece 8
The movable iron piece 50 is urged upward by the urging force from 3, and thus the movable iron piece 50 is urged upward so as to be separated from the attraction surface 34 of the magnetic pole portion 35 on one side.

The mounted state of the other end of the movable iron piece 50 is maintained as follows.

First, the bent pieces (first movement blocking body, fourth movement blocking body) 54 integral with the movable iron piece 50 are attached to the magnetic pole portion 38.
It is locked to the end face of the movable iron piece 50 to prevent the movable iron piece 50 from moving to one side, that is, the card 70 side. Further, the bending piece 54 has a large shape continuous with the opening 53 at the bottom and has a large weight to function as a weight, whereby the bending piece 54 is provided on the magnetic pole portion 38 of the horizontal protrusion 52 of the movable iron piece 50. Stable placement on the. Further, a pair of bent-shaped rising pieces (second movement preventing bodies) 39 integrally formed on both sides of the collar portion 26 at the end of the spool 22 are formed.
This prevents lateral displacement and floating of the other end of the movable iron piece 50. Further, the upper surface (third movement preventing member) 7 surface of the end wall 8 formed integrally with the base member 1 and protruding upwardly abuts on the end surface of the horizontal protruding portion 52 of the movable iron piece 50, and the movable iron piece Block the movement of 50 to the other side.

Finally, the case 1 is placed on the base member 1.
The electromagnetic relay is completed by mounting 00.

The operation will be described below.

When the coil 23 is not driven, the movable contact piece 83 is urged upward by its own spring force, and its contact 87 is in contact with the contact 85 of the upper fixed contact piece 81 (see FIG. 6). State shown). The card 70 is also urged upward by the movable contact piece 83 to lift the movable iron piece 50 upward, whereby the movable iron piece 50 is separated from the attraction surface 34 of the magnetic pole portion 35 of the iron core 21.

Next, when the coil 23 is driven, first, the horizontal protrusion 52 of the movable iron piece 50 which is in contact with the surface of the other magnetic pole portion 38 at the initial stage is attracted to the magnetic pole portion 38, whereby the magnetic force is generated. The circuit is configured so that the movable iron piece 50 is attracted to the attraction surface 34 of the magnetic pole portion 35 against the spring force of the movable contact piece 83. As a result, the card 70 descends and the movable contact piece 83 is displaced downward, its contact 87 is separated from the contact 85 of the upper fixed contact piece 81, and further abuts on the contact 86 of the lower fixed contact piece 82. In this way, the switching connection of the contacts is performed. When the driving of the coil 23 is stopped, the movable iron piece 50 is not attracted to the attraction surface 34 of the magnetic pole portion 35, so that the spring return force of the movable contact piece 83 lifts the movable iron piece 50 through the card 70, and the magnetic pole portion 38 surface. The horizontal protruding portion 52 of the movable iron piece 50 returns to the state in which it is placed in a free state.

Characteristic points in the above operation will be described.

[First characteristic point] When the coil 23 is driven,
As described above, the horizontal protrusion 52 of the movable iron piece 50 is adsorbed to the surface of the magnetic pole portion 38 in the initial stage, but when the coil 23 is not driven, the end surface of the magnetic pole portion 38 of the bending piece 54 integral with the movable iron piece 50. To prevent the movement of the movable iron piece 50 by the rising pieces 39 of the spool 22 from lateral displacement and floating, and a structure for preventing the movement of the movable iron piece 50 from being lifted up. Each of the positioning structures by abutting the end face of the horizontal protrusion 52 of the movable iron piece 50 has a horizontal protrusion 5 on the surface of the magnetic pole 38.
Since 2 is reliably positioned, the attracting action is always reliable, even though the movable iron piece 50 is attached to the magnetic pole portion 38 of the iron core 21 by a simple and free structure which does not use a hinge spring as in the past. It is supposed to be done.

In particular, a structure for preventing movement by locking the bent piece 54 integral with the movable iron piece 50 to the end surface of the magnetic pole portion 38,
To obtain the placement-stabilizing structure by the weight function of the bending piece 54, it is possible to simply bend the end portion of the movable iron plate 50. In such a configuration, the magnetic pole portion 3 of the movable iron piece 50 is obtained.
8 is a bent portion of the movable iron piece 50 that bends, and thus a stable contact structure cannot be obtained. Further, since the bent shape is slightly different depending on the product, the contact structure is not constant and therefore the product performance is constant. However, since the horizontal protrusion 52 and the bent piece 54 are separately formed as in this embodiment, the movable iron piece 50 is always stable and does not vary from product to product. Is obtained.

FIG. 7 shows another embodiment.

In the present embodiment, the guard piece 24 of the card 70 is integrally provided on the spool 22 so as to suppress the swing of the card 70 in the thickness direction. According to such a configuration, the swing of the card 70 is suppressed, so that the movement of the movable iron piece 50 in the longitudinal direction is further suppressed. Further, by adopting this configuration, it is possible to omit the movement preventing structure by the bent piece 54 of the movable iron plate 50 and the positioning structure for the upper 7 surface of the end wall 8 of the base member 1.

[Second feature point] When the coil 23 is driven, the movable iron piece 50 is attracted to the attraction surface 34 of the magnetic pole portion 35 of the iron core 21, but the coil block 20 is attached to the base member 1 by the magnetic pole portion of the iron core 21. Since the lower surface 31 of 35 is directly placed and mounted, the height of the suction surface 34 of the base member 1 becomes constant without being influenced by the assembled state of the iron core 21 and the spool 22, and the like. By driving the coil 23, the card 70 side of the movable iron piece 50 is accurately pulled down to a predetermined position. As a result, the card 70
The accuracy of the operating stroke of is improved and the opening and closing operation of the contact becomes stable.

This point is particularly effective in the case where the iron core 21 and the spool 22 are assembled as in the above embodiment, but the iron core 21 is insert-molded on the spool 22 and the insert molding is performed. It is also effective when the accuracy is low.

[0038]

According to the present invention, it is possible to obtain an electromagnetic relay in which the movable piece is easily attached to the coil block without using a hinge spring, and moreover, the movable piece is stably operated.

[Brief description of drawings]

FIG. 1 is an overall perspective view of an embodiment of an electromagnetic relay of the present invention.

FIG. 2 is an exploded perspective view of an embodiment of an electromagnetic relay of the present invention.

FIG. 3 is a bottom view of the embodiment of the electromagnetic relay of the present invention.

FIG. 4 is a sectional view of an essential part of an embodiment of an electromagnetic relay of the present invention.

FIG. 5 is a perspective view of the coil block of the embodiment of the electromagnetic relay of the present invention in which a movable iron piece is combined.

FIG. 6 is a perspective view of a contact opening / closing mechanism of the embodiment of the electromagnetic relay of the present invention.

FIG. 7 is an overall perspective view of another embodiment of the electromagnetic relay of the present invention.

[Explanation of symbols]

 1 Base member 2 Base part 3 Partition part 20 Coil block 21 Iron core 22 Spool 23 Coil 34 Adsorption surface 35 Magnetic pole part 50 Movable iron piece (movable piece) 70 Card (actuator) 80 Contact opening / closing mechanism

Claims (4)

[Claims] 1. A movable piece is disposed relative to a coil block so that its end portions face the magnetic pole portions of an iron core, respectively, and one end of the movable piece is an actuating member biased by a spring force of a contact opening / closing mechanism. An electromagnetic relay characterized in that the magnetic relay is urged to be coupled and separated from one of the opposing magnetic poles, and the other end of the movable piece is arranged in the free state of proximity to the other opposing magnetic pole. 2. The electromagnetic relay according to claim 1, further comprising: a maintaining unit that maintains a state in which the other end of the movable piece is close to the facing magnetic pole portion. 3. The first retaining member for retaining the movable member to the one end side of the coil block by the retaining means, and / or both sides of the end portion of the coil block. A second movement blocker formed on the other end of the movable piece for preventing lateral displacement and floating of the other end of the movable piece, and / or formed integrally with a base member on which the coil block is mounted, so as to contact the other end surface of the movable piece. A third movement blocking body that comes into contact with the movable piece and blocks the movement of the movable piece toward the other end side; and / or a fourth movement blocking body that is integrally formed at the other end of the movable piece and that imparts weight to the other end Claim 2
Electromagnetic relay described. 4. The first blocking body and the fourth blocking body,
The electromagnetic relay according to claim 3, wherein the electromagnetic relay is formed by a bending piece integrally formed at the other end of the movable piece.