JPH0512900Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field] The present invention relates to an electromagnetic relay.

[Conventional technology]

As this type of electromagnetic relay, for example,
The structure described in No.-280336 has been proposed by the same applicant. Referring to FIG. 2, an electromagnetic block constituted by fixing an iron core 5 and a yoke 6 to a coil assembly 7 around which an excitation coil 20 is wound fixes a movable contact spring 11 and a fixed contact terminal 12. After being fixed to the contact spring assembly 8 using the projections 10 and 13, the two magnetic pole plates are attached to the permanent magnet 3.
A contact spring driver 4 fixed to both magnetic poles is engaged with a contact spring driver holding portion 9 of the coil assembly 7 so as to be slidable laterally, and an electromagnetic relay with a cover 1 attached thereto is constructed.

When the coil 20 of the coil assembly 7 is energized, magnetic poles are generated at the end of the iron core 5 and the end of the yoke 6 connected to the iron core 5. The contact spring driving body 4 moves in the above-mentioned sliding direction due to the attraction and repulsion forces acting between these magnetic poles and the magnetic poles generated in advance on the magnetic pole plate 2 by the magnetic flux of the permanent magnet 3, and presses the movable contact spring 11. , the contact circuit is opened and closed. The assembly structure will be described in detail with reference to FIGS. 3A and 3B. The coil assembly 7 has leg portions 15 at both ends of the front flange portion 14 and groove portions 17 on the rear flange portion 16. are doing. A protrusion 10 protruding outward is provided at the lower end of the leg 15. Furthermore, the contact spring assembly 8 has the protrusion 1 on its inner wall surface.
The protrusion 18 is fitted into the groove 17, and the protrusion 13 is inserted into the groove 17 at the rear end. the two legs 15 of the coil assembly 7;
The yoke 6 is press-fitted between the leg portions 1 and 1.
The coil assembly 7 is moved in the direction of arrow A (FIG. 2) so that the protrusion 10 of No. 5 fits into the protrusion 18, and the yoke 6, coil assembly 7, and contact spring assembly 8 are attached to the front flange. It is fixed at part 14. Furthermore, in the rear flange portion 16,
The coil assembly 7 is moved in the direction of arrow B in the figure, and the groove 17 and the protrusion 13 at the rear of the contact spring assembly 8 are moved.
are fitted and fixed. At this time, the yoke 6 is caulked and fixed to the iron core 5 which is press-fitted into the coil assembly 7, so that it is indirectly fixed to the coil assembly 7.

[Problem that the invention attempts to solve]

However, the conventional electromagnetic relay described above is
Since the rear end side of the contact spring assembly 8 is open and it is not completely box-shaped, it is not affected by external force in the direction perpendicular to the iron core 5 (in the direction of arrow C), ambient temperature, or heat from the sealing resin. Contact spring assembly 8
Since the contact spring 11 is easily deformed, there is a problem in that the relative position of the contact spring 11 with respect to the driving body 4 changes, and the operability of the relay changes.

[Means for solving problems]

The electromagnetic relay of the present invention has a front flange portion having first protrusions projecting outward from both ends, a groove portion provided laterally in the lower portion, and a hole portion provided above the groove portion. a coil assembly comprising a rear flange, an excitation coil wound around the periphery, and an iron core penetrated through the center; a yoke fitted and connected to the iron core; a contact spring having a movable contact; A second lateral protrusion that fits into the first protrusion of the front flange, a third lateral protrusion that press-fits into the groove of the rear flange, and the rear flange. a contact spring assembly having a fourth protrusion that is inserted into and engaged with the hole; a contact spring that has a permanent magnet and a magnetic pole plate fixed to both magnetic poles of the permanent magnet and drives the contact spring; It is characterized by comprising a driving body;

〔Example〕

Next, the present invention will be explained with reference to the drawings.

Referring to FIG. 1, in one embodiment of the present invention, the rear flange portion 16 of the coil assembly 8 is provided with a through hole 18 parallel to the longitudinal direction of the iron core 5. As shown in FIG. On the other hand, at one end of the contact spring assembly 8,
A protrusion 19 is provided above the protrusion 13 so as to be inserted into and engaged with the through hole 18 . If the protrusion 13 and the groove 17 are only press-fitted and fixed as in the conventional structure described above, the engaging portion will not reach the lower two parts.
However, in the structure of the present invention, by employing the engagement between the protrusion 19 and the through hole 18, the upper part is easily deformed due to the influence of external force or ambient temperature. Since there are 4 locations, 2 locations and 2 locations above, it is firmly fixed, and the above problem of easy deformation does not occur, and the durability against forces in the direction perpendicular to the iron core 5 is dramatically improved. .

Note that the hole 18 does not have to be penetrating.
Further, the shape and number of the holes 18 and protrusions 19 are not limited to those shown in the drawings, and may be of any shape as long as they can prevent the assembly 8 from deforming in the lateral direction by engaging with each other.

[Effect of idea]

As explained above, in the present invention, the protrusion provided on the upper part of one end surface of the contact spring assembly and the hole provided in the coil assembly are fitted and fixed to form a box shape. Therefore, it is possible to realize an electromagnetic relay with stable operating characteristics without being affected by external forces or temperature changes.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing one embodiment of the present invention;
The figure is an exploded perspective view showing a conventional electromagnetic relay, and FIGS. 3A and 3B are a vertical sectional view and a perspective view, respectively, showing the fixing structure of the contact spring assembly and coil assembly in FIG. 2. DESCRIPTION OF SYMBOLS 1... Cover, 2... Magnetic pole plate, 3... Permanent magnet, 4... Contact spring driver, 5... Iron core, 6...
Yoke, 7... Coil assembly, 8... Contact spring assembly, 9... Contact spring driver holding part, 10, 1
3, 19...Protrusion, 11...Movable contact spring, 1
2...Fixed contact terminal, 14...Front flange part,
15... Leg portion, 16... Rear flange portion, 17...
...Groove portion, 18...Through hole, 20...Excitation coil.

Claims (1)

[Claims for Utility Model Registration] A front flange portion having first protrusions extending outward from both ends, a groove portion provided laterally in the lower portion, and a hole portion provided above the groove portion. an assembly comprising: a rear flange having a rear flange; an exciting coil wound around the periphery; and an iron core penetrated through the center; a yoke fitted and connected to the iron core; a contact spring having a movable contact; A second lateral protrusion that fits into the first protrusion of the front flange, a third lateral protrusion that press-fits into the groove of the rear flange, and the rear flange. a contact spring assembly having a fourth protrusion that is inserted into and engaged with the hole; a contact spring that has a permanent magnet and a magnetic pole plate fixed to both magnetic poles of the permanent magnet and drives the contact spring; An electromagnetic relay comprising: a driving body;