JPS6286627A - Electromagnetic relay - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an electromagnetic relay that opens and closes various electric circuits, and particularly relates to an improvement in the structure of an electromagnetic relay.

(Prior Art) As shown in FIG. 4, a conventional electromagnetic relay has a pair of input terminals 2 on a base 1, and a pair of input terminals 2 on each input terminal 2 on the base 1.
An excitation coil 3 wound around the center of the base 1 is connected by soldering, and an iron core 4 is provided at the center of the base 1.

Furthermore, a pair of fitting grooves 5a and 5b are provided on one side of the base 1 in which a pair of fixed contacts 6a and 6b are fitted at a fixed interval vertically.
are formed, and fixed contacts 6a and 6b are formed in the respective fitting grooves 5a and 5b.
are attached individually, and a movable contact 7 is provided on the upper part of the base 1 to make contact with and separate from each of the rotation contacts 6a and 6b.

Furthermore, an iron piece 8 whose lower part is bent is provided on the other side of the base 1, and specifically, a hole 8a formed in the bent lower part of the iron piece 8 is inserted into the lower end of the iron core 4. The iron piece 8 is fixed to the base 1 by inserting and caulking, and the movable contact 7 is fixed by screwing the hole 8b bored in the upper part and the hole 7a of the movable contact 7 with a screw 9. It has a supporting structure.

In actual operation, when a current flows from the input terminal 2, a magnetic flux flows through the iron piece 7b provided on the movable contact 7, and as a result, the contact portion 7C of the movable contact 7 moves to maintain a fixed distance vertically. Fixed contacts 6a and 6 installed with
By contacting one side of b, a relay operation is performed.

(Problems to be Solved by the Invention) However, in the structure of a conventional electromagnetic relay, the excitation coil 3 is fixed and the magnetic flux generated in the excitation coil 3 is caused to flow through the iron piece 7b to perform relay operation. Because it is a thing,
It was not possible to obtain an electromagnetic relay that was smaller and thinner.

(Means for Solving the Problems) The present invention has been developed to effectively solve the above-mentioned conventional problems, and includes providing a coil bobbin around which an excitation coil is wound around a coil input terminal. A movable contact plate having a contact portion that contacts and separates from a pair of fixed contacts is fixed to the coil bobbin, and a pair of magnetic field generating portions is further arranged in the vertical direction of the coil bobbin, and the coil bobbin is moved together with the movable contact plate. The configuration was adopted.

(Function) Therefore, in the present invention, after the movable contact plate is fixed to the coil bobbin provided at the coil input terminal, a pair of magnetic field generating parts are arranged in the vertical direction of the coil bobbin, and the coil bobbin is connected to the coil input terminal. When a current is applied, the current flows through the excitation coil, and due to the interaction of the magnetic flux generated between the excitation coil and the upper and lower magnetic field generation sections, the coil bobbin moves upward toward the magnetic field generation section along with the movable contact plate. The contact part of the movable contact plate moves upward and switches to the fixed contact on the upper side,
A relay operation will be performed.

(Embodiment) Hereinafter, the present invention will be described in detail based on an illustrative embodiment. The electromagnetic relay according to the embodiment is as shown in FIG.
The relay main body is composed of a lower case 11 and an upper case 12, and the lower case 11 is provided with a lower fixed contact 13 by insert molding, and the upper case 12 is provided with an upper fixed contact 14 by insert molding.

Also, the horizontal arm portions 15a of the pair of coil input terminals 15.
・A coil bobbin 16 is fixedly installed at the tip of the coil bobbin 15a, and an excitation coil 17 is wound around the coil bobbin 16, so that the pair of coil input terminals 15 are connected to their own bent mounting portions 15b. It is placed on the corresponding edge of the lower case 11 through the casing. Note that the excitation coil 17 is soldered to the appropriate position of each coil input terminal 15, respectively.

Further, a movable contact plate 18 is provided at the bottom of the coil bobbin 16.
Specifically, as shown in the figure, the movable contact plate 18 has a generally T-shape as a whole.

The central part is a movable piece part 18a, the free end side of the movable piece part 18a is a contact part 18b that alternately contacts and separates from the upper and lower fixed contacts 13 and 14, and the base end side is placed on the lower case 11. At the same time, when the movable piece part 18a is inserted into the groove 16a formed at the lower part of the coil bobbin 16, an inverted U-shaped holding piece 18 is inserted from above the coil bobbin 16.
By fixing d, the movable contact plate 18 is reliably fixed to the lower part of the coil bobbin 16.

Furthermore, a fitting hole 16b is formed in the center of the coil bobbin 16 in the vertical direction, and two permanent magnets 1 are inserted into the fitting hole 16b.
A pair of magnetic field generating parts 21a and 21b constituted by the pole piece 9 and the pole piece 20 are connected to the fitting part 2 of each center pole piece 20.
The pair of magnetic field generating portions 21a and 21b are fitted from above and below through 0a, and are arranged above and below the coil bobbin 16 around which the excitation coil 17 is wound. Incidentally, among the magnetic field generating parts, the upper generating part 21a is fixed in advance to a proper position on the upper case 12, and the lower generating part 21b is fixed in advance in a proper place in the lower case 11, and both of the magnets 19 have strong magnetic force. The magnetic poles N-8 are installed between the pole pieces 20 in opposite directions.

Further, holes are bored in the movable piece 18a and the holding piece 18d of the movable contact plate 18 corresponding to the opening of the fitting hole 16b of the coil bobbin 16 to allow the fitting parts 20a to fit into the fitting hole 16b. Needless to say.

Therefore, in the electromagnetic relay configured as described above, the presser piece 18 is attached to the lower part of the coil bobbin 16 that is fixed to the horizontal arm portions 15a, 15a of the pair of coil input terminals 15, 15.
After fixing the movable contact plate 18 via d, the mounting portions 15b of the pair of coil input terminals 15 and the mounting portion 18c of the movable contact plate 18 are placed on corresponding edges of the lower case 11, respectively. death.

Next, each fitting part 20 of the upper and lower magnetic field generating parts 21a and 21b
A is fitted into the insertion hole 16b of the coil bobbin 16 from the opposite direction, and the upper case 12 is simply placed over the lower case 11, thereby easily being assembled into the state shown in FIG. 2.

In this assembled state, the mounting portion 15a of the coil input terminal 15 and the mounting portion 18c of the movable contact plate 18 are positioned with respect to the lower case 11 by the upper case 12, and the movable contact plate Eighteen contact portions 18b are located between the lower fixed contact 13 of the lower case 11 and the upper fixed contact 14 of the upper case 12.

Next, to explain the operation of the electromagnetic relay having such a configuration, first, when a voltage is applied to the pair of coil input terminals 15, a current flows through the excitation coil 17, and the excitation coil 17 and the pair of upper and lower magnetic field generators 21a・Each permanent magnet 19, 19 of 21b
Due to the interaction of the magnetic flux generated between the coil bobbin 16
The movable piece portion 18a of the movable contact plate 18 is deformed and moves toward the upper magnetic field generating portion 21a, and as a result, the contact portion 18b of the movable contact plate 18 also moves upward, and the upper case 1
The relay operation is performed by switching to the upper fixed contact 14 on the second side.

Moreover, in the relay operation, as described above, the pair of magnetic field generating parts 21a and 21b are arranged in the vertical direction of the coil bobbin 16, and the two permanent magnets 19 constituting each magnetic field generating part 21a and 21b are arranged in the vertical direction of the coil bobbin 16. The magnetic pole, pole piece 20
Since they are oriented in opposite directions with the intervening
As shown in FIG. 2, the magnetic flux density passing through the excitation coil 17 increases, resulting in highly sensitive relay operation.

(Effects of the Invention) As described above, the present invention provides a coil bobbin for winding an excitation coil around a coil input terminal, and also fixes a movable contact plate having a contact portion that comes into contact with and separates from a pair of fixed contacts to the coil bobbin, and further A pair of magnetic field generators are arranged in the vertical direction of the coil bobbin, and the coil bobbin is moved together with the movable contact plate, so unlike conventional electromagnetic relays, the exciting coil and the pair of upper and lower With the magnetic flux density obtained by the interaction of the magnetic field generating parts.

For the first time, it became possible to move the excitation coil together with the coil bobbin, making it possible to provide a smaller and thinner electromagnetic relay.

In addition, the configuration in which the magnetic field generating parts are placed one above the other produces an extremely high magnetic flux density, which not only makes it possible to make electromagnetic relays as compact and thin as possible, but also enables highly sensitive electromagnetic relays. It also makes it possible to provide the following.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view of an electromagnetic relay according to an embodiment of the present invention, FIG. 2 is a cross-sectional view showing an assembled state of the same electromagnetic relay, and FIG. 3A is an exploded perspective view of an electromagnetic relay according to an embodiment of the invention. FIG. 4 is an explanatory diagram showing the flow of magnetic flux in a magnetic field generating section. FIG. 4 is an explanatory diagram showing the flow of magnetic flux in the relationship between a pair of magnetic field generating sections. FIG. 13... Lower fixed contact, 14... Upper fixed contact, 1
5... Coil input terminal, 16... Coil bobbin, 1
7... Excitation coil, 18... Movable contact plate, 18b.
...Contact part, 21a, 21b...Magnetic field generation part. Patent applicant: Alps Electric Co., Ltd. Figure 1 Figure 2

Claims (1)

[Claims] A coil bobbin for winding an excitation coil around the coil input terminal is provided, a movable contact plate having a contact portion that comes into contact with and separates from a pair of fixed contacts is fixed to the coil bobbin, and a pair of magnetic field generation portions are further provided in the vertical direction of the coil bobbin. An electromagnetic relay characterized in that the coil bobbin is moved together with the movable contact plate.