JPH0680241U - Polarized electromagnetic relay - Google Patents

Abstract

(57) [Summary] [Object] The present invention relates to the construction of a magnetic circuit in a polarized electromagnetic relay to obtain stable operation. According to the present invention, in a yoke that forms a magnetic circuit with a movable core that operates by exciting a coil, at least one surface of the yoke that is in contact with the movable core is crushed in the plate thickness direction, and a protrusion is formed. It is a configuration in which they are provided and contacted with each other. [Effect] In a polarized magnetic circuit, the above-mentioned structure is provided at a position where a certain air gap is required, so that the air gap can be secured equivalently, stable operation can be obtained, and the number of parts and the process can be reduced. A compact and compact electromagnetic relay can be obtained.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an electromagnetic relay suitable for the shape of the hinge of a polarized electromagnetic relay.

[0002]

[Prior art]

 In a polarized electromagnetic relay with a polarized magnetic circuit structure, it is an important point to stabilize the magnetic resistance in the air gap of the magnetic circuit because of its operating characteristics. In particular, in the bridge-type polarized magnetic circuit such as Japanese Patent Application No. 4-168152 proposed by the applicant of the present invention, the magnetic resistance of the air gap is important. As shown in Fig. 5, the conventional method for obtaining the magnetic resistance of the air gap in a magnetic circuit of a polarized electromagnetic relay is to use a non-magnetic plate on either one of the faces where the movable core and yoke are facing each other. , The parts were plated with copper or electroless nickel with a specific thickness that plays a non-magnetic function, or the parts were fixed to the bobbin to secure the necessary voids. . However, all of these had the drawbacks that the manufacturing process of the electromagnetic relay was complicated, it was not economical due to high precision plating and other processing, and there was a problem with dimensional accuracy due to synthetic resin parts. .

[0003]

[Problems to be solved by the device]

 In order to solve the above problems and to economically and stably obtain an electromagnetic relay of a polar magnetic circuit having a void with high dimensional accuracy, as shown in FIG. 3 and FIG. Provide a polarized electromagnetic relay that is crushed in the same direction and provided with protrusions to minimize the portion that comes into contact with the movable iron core and to obtain a magnetic resistance equivalent to that when an air gap is provided equivalently. It was made possible.

[0004]

[Means for Solving the Problems]

 The polar type electromagnetic relay of the present invention will be described in detail based on examples. FIG. 1 is an assembled perspective view showing an example of the polar type electromagnetic relay of the present invention, and FIG. 2 is an exploded view showing the configuration of FIG. It is a perspective view.

In the figure, reference numeral 1 denotes a base block, which is a set of two contact springs, that is, movable contact spring terminals 2a and 2a ', break fixed contact springs 3 and 3', make fixed contact springs 4 and 4 ', and a first yoke 5. Are integrally fixed to the base block 1 by insert molding. From the upper side of the base block 1, one permanent magnet 10 is fitted and inserted into the hole 1b provided in the base block 1 and brought into contact with the exposed upper surface of the first yoke 5.

[0006] Next, one protrusion 6a, 6a 'is provided below the flange of the coil 6,6' around which the coil 7, 7'is wound, and press-fitted into the other flange. Each of the two coil terminals 6c thus formed is fitted and fixed in the hole 1c of the base block 1. Then, the through holes 8c, 8c 'provided at the end portions of the cards 8, 8'are inserted into the projecting portions 6b, 6b' disposed on the upper side of the other flange portion of the coil portions 6, 6 ', and at the same time, one side thereof is inserted. The movable contact springs 2 and 2 ′ are fitted and installed in the U grooves 8 b and 8 b ′ provided in the.

Next, the movable iron cores 9 and 9 ′ are inserted and penetrated from the side of the coil terminals 6c of the central cavities 6d and 6d ′ of the coil portions 6 and 6 ′, and the holes 8a and 8a ′ of the cards 8 and 8 ′ are penetrated. Insert and install. The U-shaped second yoke 11 is press-fitted with the U-shaped tip 11b of the second yoke into the hole 1d of the base block 1 so that the U-shaped end face of the second yoke 11 contacts the permanent magnet 10. To be fixed. Finally, by injecting an adhesive from the back surface of the base block 1 to seal the coil terminals 6c and the terminal holes of each spring, each terminal is fixed to the base block 1 and the polarities of the present invention shown in FIG. Type electromagnetic relay is assembled.

FIG. 3 is a front view showing the hinge structure of the embodiment of the present invention. FIG. 4 is a perspective view of a yoke component showing an embodiment of the present invention. FIG. 5 is a front view showing an example of a hinge gap in a conventional polarized electromagnetic relay.

Next, the present invention will be described in detail with reference to FIG. 3, in which the first yoke 5 and the second yoke 11 are fixed to the base block 1 at both ends of the two movable iron cores 9, 9 ′. As shown in Fig. 4, the tip portions of the first yoke 5 and the second yoke 11 are crushed to about half the plate thickness, and the protrusions are projected at the tips. This portion and the movable iron core 9 , 9'are in contact. The protrusion may be a semicircle or a triangle, and may have any shape as long as the contact area with the movable iron core is as small as possible. As a result, it can be equivalently equivalent to the one provided with the void.

FIG. 6 shows an equivalent circuit of a polarized magnetic circuit according to an embodiment of the present invention. Ra1, Rd1, Ra2 and Rb2 shown in FIG. 6 are magnetic reluctances of the gaps (a1, d1, a2 and d2) between the movable iron cores 9 and 9 ′ and the first and second yokes 5 and 11 shown in FIG. Is. In this way, since the protrusions protruding from each yoke come into contact with the movable iron core, the accuracy of the dimensions a1 ', d1', a2 ', d2' of this hinge part is increased, and stable operation is obtained. . Further, it is very economical because it is not necessary to apply a non-magnetic plate or specific plating. In addition, depending on the conditions, if the magnetic resistance equivalent to that of the air gap is equivalently obtained only by the protrusion without crushing the tips of the first yoke 5 and the second yoke 11, the shape of the protrusion is required. Should be devised.

[0011]

[Effect of device]

 As described above in detail, in the polarized magnetic circuit configuration of the electromagnetic relay of the present invention, a crush is inserted in the plate thickness direction at the tip of the iron part (yoke) where a certain gap is required, and the opposing parts ( By providing the protrusion so as to reduce the area of the portion in contact with the movable iron core), the void can be equivalently secured. As a result, the dimensional accuracy is improved, stable operation is obtained, the number of parts and the process are reduced, and it is possible to provide an extremely economical small-sized polarized electromagnetic relay.

[Brief description of drawings]

FIG. 1 is an assembled perspective view showing an embodiment of the present invention.

FIG. 2 is an exploded perspective view of FIG.

FIG. 3 is a front view showing a hinge portion structure according to an embodiment of the present invention.

FIG. 4 is a perspective view showing a component (yoke) of one embodiment of the present invention.

5A, 5B and 5C are front views showing a conventional hinge structure.

FIG. 6 shows an equivalent magnetic circuit of the present invention.

[Explanation of symbols]

 1 ... Base block 2 ... Moving contact spring 3 ... Break fixed contact spring 4 ... Make fixed contact spring 5 ... First yoke 6 ... Coil part 7 ... Coil 8. ..Drive card 9 ... Movable iron core 10 ... Permanent magnet 11 ... Second yoke

Claims (2)

[Scope of utility model registration request] 1. A coil, a movable iron core operated by excitation of the coil, a yoke arranged so as to form a magnetic circuit, a permanent magnet in some cases, and a drive card fixed to the movable iron core. A polarized electromagnetic relay comprising a movable contact spring having a movable contact that operates in conjunction with the movable contact spring, and a fixed contact spring having a fixed contact facing the movable contact and being disposed on the base block so as to face each other. A polar type electromagnetic relay, characterized in that at least one yoke surface on the side in contact with the movable iron core is crushed in the plate thickness direction, and a protrusion is provided to make opposing contact. 2. A coil, a movable iron core operated by excitation of the coil, a yoke arranged so as to form a magnetic circuit, a permanent magnet in some cases, and a drive card fixed to the movable iron core. A polarized electromagnetic relay having a movable contact spring having a movable contact that operates in conjunction with the movable contact spring, and a fixed contact spring having a fixed contact facing the movable contact and facing and disposed on a base block. A polar type electromagnetic relay, characterized in that at least one yoke surface on the side in contact with the movable iron core is provided with a projection so as to make opposing contact.