JP2003168353A - Electromagnetic relay - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electromagnet device facilitating parts management by obviating the need of preparing a plurality of molding dies. <P>SOLUTION: Flange parts 73 and 74 are symmetrically formed at both ends of a barrel part 72 of a spool 71. Coil terminal holes 73a, 73b, 74c, and 74a, 74b, 73c allowing the insertion of respective coil terminals 83, 84, and 85 are formed respectively at positions point-symmetrical with respect to a shaft center 71a positioned at the center of the spool 71 in the flange parts 73 and 74. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an electromagnetic relay, and more particularly,
The present invention relates to a spool shape of an electromagnet device incorporated therein.

[0002]

2. Description of the Related Art Conventionally, in an electromagnetic relay incorporating an electromagnet device, a movable iron piece supported so as to be capable of self-returning is rotated by imbalanced left and right magnetic balance. Some switch contacts.
As such an electromagnetic relay, for example, JP-A-10-
As disclosed in Japanese Patent No. 208601, a normally closed fixed contact 2
There is a self-reset type electromagnetic relay that alternately opens and closes 1a and a normally open fixed contact 22a. That is, the electromagnet block 30
By rotating the movable block 50 with the movable iron piece 40 that rotates based on the excitation and demagnetization of the normally closed movable contact piece 5
3a is a common fixed contact 23b and a normally closed fixed contact 21a.
Then, the normally open movable contact piece 53b is connected to the common fixed contact 23.
a and the normally open fixed contact 22a are alternately contacted and separated.

However, when the electromagnetic relay is mounted on a printed circuit board or the like and used, different contact arrangement specifications may be required on the circuit wiring without changing the mounting state of the terminals. For example, in a certain specification, like the above-mentioned electromagnetic relay, the normally closed fixed contact 21a is provided on the left side of the electromagnet block 30.
And an electromagnetic relay having a normally open fixed contact 22a on its right side is mounted on a printed circuit board. On the other hand, in other specifications, when there is a demand for a contact arrangement opposite to the above-mentioned contact arrangement on the circuit wiring, a normally closed fixed contact 21a is provided on the right side of the electromagnet block 30, and a normally open fixed contact 21a is provided on the left side thereof. An electromagnetic relay with fixed contacts 22a is required. In such a case, in the electromagnetic relay according to the conventional example, it is necessary to prepare two types of movable bases, normally closed fixed contact terminals, common fixed terminals, normally open fixed contact terminals, etc. in preparation for different specifications. . For this reason, the number of parts increases, and parts management becomes complicated. Further, in order to manufacture the movable table and the contact terminal, it is necessary to always prepare two types of molding dies and press dies, which causes a problem of increasing the production cost.

On the other hand, another electromagnetic relay incorporating an electromagnet device is disclosed in, for example, Japanese Unexamined Patent Publication No. 9-231895. In this publication, a self-holding type electromagnetic relay is mainly disclosed as an embodiment, but it is also disclosed that the magnetic balance is lost and the electromagnetic relay is used as a self-restoring type electromagnetic relay. When the above-mentioned electromagnetic relay is a self-reset type, for example, the permanent magnet 30 is arranged at a position eccentric from the center of the electromagnet block 10.

However, even the self-reset type electromagnetic relay as described above may need to be used in the opposite specification mode depending on the installation environment. In such a case, it is necessary to prepare two types of base block 10, spool 12, etc., as in the above-mentioned conventional example. For this reason, the number of parts increases, the parts management becomes complicated, and two types of molding dies have to be prepared for molding the spool and the base block, resulting in an increase in production cost.

In view of the above problems, it is an object of the present invention to provide an electromagnetic relay in which it is not necessary to prepare a plurality of molds for manufacturing and the parts management is simple.

[0007]

In order to achieve the above object, an electromagnetic relay according to the present invention is formed by arranging a permanent magnet on the lower surface of an iron core assembled to the body of a spool and winding a coil. Based on the excitation and demagnetization of the electromagnet device, the movable iron piece attracted to the lower end surface of the permanent magnet is rotated like a seesaw to drive the contact mechanism portion arranged on the lower side of the movable iron piece. In an electromagnetic relay in which a magnet is attached at a position eccentric from the center of the spool to make the left and right magnetic balance unbalanced and the movable iron piece is capable of self-returning, a collar portion is symmetrical to both ends of the body portion of the spool. And a coil end into which the coil terminal can be inserted at a position symmetrical with respect to the shaft center located at the center of the spool in the collar portion. There pores of a structure in which respectively.

Therefore, according to the present invention, even if the spool is inverted by 180 degrees, it can be used by being assembled to other components as in the case where the spool is not inverted. Moreover,
By reversing the spool 180 degrees, the left and right magnetic balance is reversed. For this reason, one type of spool can be used in different specifications, parts management is simplified, and only one type of molding die need be prepared, and the production cost can be reduced.

As another invention, the permanent magnet is arranged on the lower surface of an iron core assembled to the body of the spool, and the permanent magnet is formed based on the excitation and demagnetization of an electromagnet device formed by winding a coil. The movable iron piece adsorbed to the lower end surface of the iron core is rotated like a seesaw to drive the contact mechanism portion arranged on the lower side of the movable iron piece, and the shape of the magnetic pole portion located at one end of the iron core is set to the iron shape. In the electromagnetic relay in which the movable iron piece is capable of self-restoration by making the shape of the magnetic pole portion located at the other end of the core different from that of the magnetic pole portion, the collar portion is provided at both ends of the body portion of the spool. The coil terminal holes are formed so as to be bilaterally symmetric, and the coil terminal holes into which the coil terminals can be inserted are respectively provided at positions on the collar portion that are point symmetric with respect to an axis located at the center of the spool. It may have been the only configuration.

According to the above invention, similar to the above effects,
This has the effects of reducing production costs and simplifying parts management.

According to another aspect of the present invention, the permanent magnet is arranged on the lower surface of the iron core assembled to the body of the spool, and the permanent magnet is excited and demagnetized based on the excitation and demagnetization of the electromagnet device formed by winding the coil. The movable iron piece adsorbed to the lower end surface is rotated like a seesaw to drive the contact mechanism portion arranged on the lower side of the movable iron piece, and the rotation fulcrum of the movable iron piece is provided at a position eccentric from its center. As a result, in the electromagnetic relay in which the left and right magnetic balances are unbalanced and the movable iron piece is capable of self-restoring, the collar portions are formed symmetrically at both ends of the body portion of the spool, and the collar portion is formed. Of these, coil terminal holes into which coil terminals can be inserted may be provided at positions that are point-symmetrical with respect to an axis located at the center of the spool.

According to the above invention, similar to the above effects,
This has the effects of reducing production costs and simplifying parts management.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment according to the present invention will be described with reference to the accompanying drawings of FIGS. The electromagnetic relay according to the present embodiment is used to open and close a high frequency circuit, and as shown in FIG.
The electromagnet block 70 having the movable iron piece 60 mounted thereon is placed on top of it, and the case 90 is covered.

As shown in FIG. 3, the base block 10 includes a base 20 incorporating a pair of movable contact blocks 40, 45, a lower shield plate 30 and an upper shield plate 50.
It is sandwiched from above and below.

The base 20 includes a lead frame (not shown), a common fixed contact terminal 21 and a normally open fixed contact terminal 22.
After the normally closed fixed contact terminal 23 is punched out, it is conveyed into a mold and insert-molded. Then, the terminals 21, 22 are pressed from the lead frame.
23 is cut off and bent to complete. In addition,
A lower shield plate 3 to be described later is provided on the peripheral edge of the base 20.
An insertion hole 24 for assembling 0 is formed. Further, the base 20 has positioning recesses 2 on both end surfaces.
7a and 27b are formed.

The lower shield plate 30 is formed by punching out a conductive plate material by press working and bending and raising the peripheral edge portion to form the standing wall 31. A foldable locking tongue piece 32 is appropriately formed on the upper end of the standing wall 31.

Further, a return spring 35 is integrally welded to the central portion of the bottom surface of the lower shield plate 30. Both ends 36 and 37 of the return spring 35 are pressed against the lower end surfaces of movable contact blocks 40 and 45, which will be described later, and the movable contact pieces 41 and 46 are moved.
Is urged upward.

The movable contact blocks 40, 45 are formed by insert-molding movable contact pieces 41, 46 made of a conductive leaf spring, and the vertical guide grooves 25, 25 of the base 20.
Installed along 26. Therefore, the movable contact piece 41
Both ends of the fixed contact portion 21 of the common fixed contact terminal 21 are
a and the fixed contact portion 22a of the normally open fixed contact terminal 22 are respectively contacted and separated. Further, both ends of the movable contact piece 46 are brought into contact with and separated from the fixed contact portion 21a of the common fixed contact terminal 21 and the fixed contact portion 23a of the normally open fixed contact terminal 23, respectively.

The upper shield plate 50 is made of a rectangular plate-shaped conductive material, and the movable contact blocks 40 and 45 project vertically from the insertion holes 51 and 52 provided at two positions in the longitudinal direction. The upper shield plate 50 is provided with ground contact portions 53a and 53b so as to face each other with the insertion hole 51 in between, and 54a and 54b so as to face each other with the insertion hole 52 in between. There is. Further, the upper shield plate 50 has a grounding terminal 56 extending from the shielding tongues 55a, 55b, 55c, 55d extending from the peripheral edge portion thereof. For example, the shielding tongue piece 55d covers the base of the common fixed contact point contact terminal 21 protruding from the side surface of the base 20 to improve high-frequency characteristics, as shown in FIG. 4B. The positioning claws 57a, 57 are provided on both ends of the upper shield plate 50.
b projects laterally (Fig. 4A).

Next, the assembly process of the base block 10 will be described. The return spring 3 is inserted into the insertion hole 24 of the base 20.
The upright wall 31 of the lower shield plate 30 in which 5 are integrated by welding is inserted from the lower side. Then, the movable blocks 40 and 45 are respectively assembled along the vertical guide grooves 25 and 26 of the base 20 and positioned at a predetermined position. Then, the upper shield plate 50 is assembled to the base 20 and the base 20
The positioning claws 57a and 57b of the upper shield plate 50 are fitted into the positioning recesses 27a and 27b respectively for positioning. Then, by bending the locking tongue piece 32 of the lower shield plate 30 inward, the lower shield plate 30
The base 20 is sandwiched between the upper shield plate 50 and the upper shield plate 50. As a result, a stripline structure is formed, and the movable block 40, from the insertion holes 51, 52 of the upper shield plate 50,
The upper end of 45 is pushed out so that the base block 1
Assembly of 0 is completed.

The movable iron piece 60 is made of a plate-shaped magnetic material,
A protrusion 61 is formed in the central portion to form a fulcrum for rotation, and the magnetic shield plate 6 is formed at one end of the upper surface.
2 is attached. Further, the movable iron piece has a pressing spring 65 integrally welded to the central portion of the lower surface thereof (FIG. 6).

The pressing spring 65 has a substantially cross shape in a plan view, and the opposite ends thereof are bent and bent at a substantially right angle so that the support projection 6 is formed.
6, 66 are formed. The support protrusions 66, 66 have a substantially triangular front shape so that they can be self-aligned, and the tops thereof are located on the same straight line as the tops of the protrusions 61 of the movable iron piece 60. Therefore, since the rotation fulcrums of the movable iron piece 60 are aligned on the same line, there is an advantage that the movable iron piece 60 smoothly rotates. Further, the elastic arms 67 and 68 are formed by pressing the opposite ends of the pressing spring 65, which are opposite to each other (FIG. 6).

The electromagnet block 70 is constructed by incorporating the iron core 80 and the coil terminals 83 and 8485 in the spool 71, winding the coil 86, and then assembling the permanent magnet 87. That is, as shown in FIG. 7A, the spool 71 has a collar portion 7 at both ends of a body portion 72 around which a coil 86 is wound.
3, 74 are formed symmetrically, and a support base 75 is integrally formed in the center of the body portion 72. A press-fitting groove 72a into which an iron core 80 described later can be press-fitted is formed on the lower surface of the body portion 72.

The collar portions 73 and 74 are provided with coil terminal holes 73a, 73b, 7 at positions symmetrical with respect to an axis 71a (FIG. 7A) located at the center of the spool 70.
3c and 74a, 74b, 74c are formed, respectively. Either one of the two coil terminal holes 73a and 73b arranged in parallel or 74a and 74b is for a dummy terminal.

Further, as shown in FIGS. 2 and 7C,
An accommodating concave portion 75a is formed on the lower surface of the support base 75 with an axis 71a.
It is eccentrically provided on the left side of. Therefore, by assembling the substantially rectangular parallelepiped permanent magnet 87 in the accommodation recess 75a, the permanent magnet 87 can be arranged at a position eccentric to the left from the axis 71a. Further, the support protrusions 66 of the pressing spring 65 are provided on the lower end edges of both sides of the support base 75.
Is formed with a notch 75b.

As shown in FIG. 2, the iron core 80 has a substantially hat-shaped cross section, and both ends of the iron core 80, which are incorporated into the body portion 72 of the spool 71 and project, are magnetic pole portions 81 and 82.

Therefore, to assemble the electromagnet block 70, the iron core 80 is inserted into the press-fitting groove 72a of the spool 71.
While press-fitting the coil terminals 83, 84 into the coil terminal holes 73a, 73b and 74c of the collar portions 73 and 74.
And 85 respectively. Then, the body 72
A coil 86 is wound around the coil 86, and both ends thereof are coil terminals 84,
Solder by tying each to the upper end of 85. Further, the electromagnet block 70 is completed by assembling the permanent magnet 87 into the accommodation recess 75a provided on the lower surface of the support base 75 of the spool 71. And the spool 7
Positioning notch 75b provided on the support base 75 of No. 1,
The support protrusions 66, 66 of the pressing spring 65 are fitted to 75b, respectively. Further, the movable iron piece 60 is attached to the permanent magnet 87.
Then, the movable iron piece 60 is assembled to the electromagnet block 70 by adsorbing the iron piece (FIG. 6).

The case 90 corresponds to the electromagnet block 7
It has a box shape that can be fitted to the base block 10 in which 0 is assembled. Then, a sealant is applied to the fitting surface between the base block 10 and the case 90, and the sealant is cured in a constant temperature bath. And the case 90
The assembly work of the electromagnetic relay is completed by removing the internal air from the gas venting portion 91 of FIG.

According to this embodiment, the normally open fixed contact portion 22 is provided.
The a and the normally closed fixed contact portions 23a are arranged at both ends of the long side of the base 20, and the two are at positions separated from each other. Further, the normally open fixed contact terminal 22 and the normally closed fixed contact terminal 23 thereof
Respectively project laterally from the corners of one of the long sides, and the two are located apart from each other. On the other hand, the common fixed contact terminal 21 projects laterally from the central portion of the other long side facing each other, and laterally projects from the corner of the other long side facing the coil terminal 56, respectively. The normally open fixed contact terminal 22, the normally closed fixed contact terminal 23, the common fixed contact terminal 2
1 and the coil terminal 83, 85 between the ground terminal 56
Are arranged respectively. Therefore, according to this embodiment, there is an advantage that an electromagnetic relay for high-frequency switching having excellent isolation characteristics can be obtained.

Next, the operation of the electromagnetic relay having the above configuration will be described. As shown in FIG. 2, when no voltage is applied to the coil 86, the one end portion 60 a of the movable iron piece 60 is attracted to the magnetic pole portion 81 of the iron core 80. Therefore, the elastic arm portion 68 of the pressing spring 65 pushes down the movable contact block 45. As a result, both ends of the movable contact piece 46 resist the spring force of the other end 37 of the return spring 35,
The common fixed contact portion 21a and the normally closed fixed contact portion 23a are in contact with each other. On the other hand, the movable contact block 40 has a return spring 3
The movable contact piece 41 is urged upward by one end 36 of the upper end 5 and the two ends of the movable contact piece 41 are ground contact portions 53a, 53b of the upper shield plate 50.
Is in contact with.

When a voltage is applied to the coil 86 in a direction to cancel the magnetic flux of the permanent magnet 87, the magnetic pole portion 82 of the iron core 80 attracts the other end portion 60b of the movable iron piece 60, and the movable iron piece 60 projects. Rotate with the top of the strip 61 as the pivot. Therefore, the elastic arm portion 67 of the pressing spring 65 pushes down the movable contact block 40 against the spring force of the one end portion 36 of the return spring 35. As a result, the movable contact block 40 descends, and both ends of the movable contact piece 41 have the common fixed contact portion 21a.
And the normally open fixed contact portion 22a. On the other hand, the movable contact block 45 is pushed up by the spring force of the other end portion 37 of the return spring 35, and both ends of the movable contact piece 46 are separated from the common fixed contact portion 21a and the normally closed fixed contact portion 23a, respectively. Ground contact parts 54a, 54 of the shield plate 50
b respectively. Then, the other end portion 60b of the movable iron piece 60 is attracted to the magnetic pole portion 82 of the iron core 80 via the magnetic shield plate 62.

Further, when the application of the voltage to the coil 86 is stopped, the magnetic balance of the electromagnet device 70 is unbalanced, and the magnetic force at the magnetic pole portion 81 of the iron core 80 is stronger than the magnetic force at the magnetic pole portion 82. Therefore, the magnetic pole portion 8 of the iron core 80
Since the force by which 1 attracts the one end portion 60a of the movable iron piece 60 is larger than the force by which the magnetic pole portion 82 of the iron core 80 attracts the other end portion 60b of the movable iron piece 60, the movable iron piece 60 rotates in the opposite direction. Move. Therefore, while the elastic arm portion 68 of the pressing spring 65 pushes down the movable contact block 45, the return spring 65
One end 36 of the push-up pushes up the movable contact block 40. As a result, both ends of the movable contact piece 46 are fixed to the common fixed contact portion 21.
a and the normally open fixed contact portion 23a, both ends of the movable contact piece 41 are connected to the ground contact portion 5 of the upper shield plate 50.
It contacts 3a and 53b and returns to the original state.

In the above embodiment, the normally closed fixed contact portion 23a is formed by the movable contact block 45 located on the right side in FIG.
Although it is opened and closed, there is a case where the normally closed fixed contact portion 22 is desired to be arranged on the left side. In such a case, for example, as shown in FIG.
4b and 73c are inserted into the coil terminals 83, 84 and 85, respectively, and the permanent magnet 87 is mounted at the spool 7 position.
It may be arranged on the right side of the first axis 71a (FIG. 8C). According to this embodiment, the same spool 71
Since the electromagnet blocks 70 having different specifications can be obtained in, the molding die can be used with one type and the production cost can be reduced.
Further, since the number of parts to be managed is reduced, there is an advantage that the parts management becomes easy.

The coil terminal hole provided on the spool is
It is needless to say that the number and the position can be changed as needed. Further, as a method for making the left and right magnetic balance imbalanced, for example, the shapes of the magnetic pole portions located at both ends of the iron core or the shapes of both end portions of the movable iron piece may be different, and the rotation of the movable iron piece may be changed. You may provide the protrusion used as a fulcrum in the position eccentric from the center.

[0035]

According to the present invention, even if the spool is inverted by 180 degrees, it can be assembled and used in other components as in the case where the spool is not inverted. Moreover, by reversing the spool 180 degrees, the left and right magnetic balance is reversed. Therefore, one type of spool can be used in different specification modes, parts management is simplified, and only one type of molding die need be prepared, which has the effect of reducing the production cost.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an electromagnetic relay to which an electromagnet device according to the present invention is applied.

FIG. 2 is a vertical cross-sectional view of the electromagnetic relay shown in FIG.

FIG. 3 is an exploded perspective view of the base block shown in FIG.

4 is a plan view of the base block shown in FIG. 3, and FIG. 4B is a vertical sectional view.

5 is a perspective view of the base block shown in FIG. 3 as seen from below, and FIG. 5 is a partially enlarged view of FIG.

FIG. 6 is a perspective view of the electromagnet block shown in FIG. 1 viewed from the lower side.

7A and 7B show spools that form the electromagnet block shown in FIG. 1, FIG. A being a plan view, FIG. B being a front view, and FIG. C being a bottom view.

8A and 8B show different uses of the spool shown in FIG. 7, FIG. A being a plan view, FIG. B being a front view, and FIG. C being a bottom view.

[Explanation of symbols]

10 ... Base block, 20 ... Base, 21 ... Common fixed contact terminal, 21a ... Common fixed contact part, 22 ... Normally open fixed contact terminal, 22a ... Normally open fixed contact part, 23 ... Normally closed fixed contact terminal, 23a ... Normal Closed fixed contact part, 30 ... Lower shield plate,
35 ... Return spring, 40, 50 ... Movable contact block, 4
1, 46 ... Movable contact piece, 50 ... Upper shield plate, 51, 5
2 ... Insertion hole, 53a, 53b, 54a, 54b ... Ground contact part, 55a, 55b, 55c, 55d ... Shield tongue, 56 ... Ground terminal, 60 ... Movable iron piece, 61 ... Projection, 62 ... Magnetic shield plate , 65 ... pressing spring, 66 ... support protrusion,
67, 68 ... Elastic arm portion, 70 ... Electromagnet block, 71 ...
Spool, 71a ... Spool axis, 72 ... Body, 7
3, 74 ... Collar portion, 73a, 73b, 73c, 74a, 7
4b, 74c ... Coil terminal hole, 75 ... Support base, 75a ...
Housing recess, 75b ... Notch, 90 ... Case, 91 ...
Degassing part.

Continued front page    (72) Inventor Yuzo Okano             Shiokyo-ku, Kyoto-shi, Kyoto Prefecture             801 Kudo-cho Omron Co., Ltd.

Claims (3)

[Claims] 1. A permanent magnet is arranged on the lower surface of an iron core assembled to the body of a spool, and is attracted to the lower end surface of the permanent magnet based on the excitation and demagnetization of an electromagnet device formed by winding a coil. By rotating the movable iron piece like a seesaw to drive the contact mechanism portion arranged on the lower side of the movable iron piece, and by attaching the permanent magnet to a position eccentric from the center of the spool, the left and right magnetic balances are balanced. In an electromagnetic relay in which the movable iron piece is capable of self-returning due to imbalance, a collar portion is formed at both ends of the body portion of the spool so as to be bilaterally symmetrical, and the center of the spool of the collar portion is formed. An electromagnetic relay, wherein coil terminal holes into which coil terminals can be inserted are provided at positions that are point-symmetrical with respect to an axis located at. 2. A permanent magnet is arranged on the lower surface of an iron core assembled to the body of the spool, and is attracted to the lower end surface of the permanent magnet based on the excitation and demagnetization of an electromagnet device formed by winding a coil. The movable iron piece is rotated like a seesaw to drive the contact mechanism portion arranged below the movable iron piece, and the shape of the magnetic pole portion located at one end of the iron core is located at the other end of the iron core. In the electromagnetic relay in which the left and right magnetic balances are made unbalanced to make the movable iron piece self-recoverable by making it different from the shape of the magnetic pole portion, the collar portions are symmetrically provided at both ends of the body portion of the spool. Each of them is formed, and a coil terminal hole into which a coil terminal can be inserted is provided at a position of the collar portion that is point-symmetrical with respect to an axis located at the center of the spool.磁継 electronics. 3. A permanent magnet is arranged on the lower surface of an iron core assembled to the body of the spool, and is attached to the lower end surface of the permanent magnet based on the excitation and demagnetization of an electromagnet device formed by winding a coil. By rotating the movable iron piece like a seesaw to drive the contact mechanism portion arranged on the lower side of the movable iron piece, and by providing the rotation fulcrum of the movable iron piece at a position eccentric from the center, An electromagnetic relay in which the magnetic balance is unbalanced and the movable iron piece is capable of self-returning, wherein collar portions are formed at both ends of a body portion of the spool so as to be bilaterally symmetrical, and the spool portion of the collar portion is the spool. An electromagnetic relay in which coil terminal holes into which coil terminals can be inserted are respectively provided at positions that are point-symmetric with respect to an axis located at the center of the.