JPH0443526A - Plunger-driving type electromagnetic relay - Google Patents

Abstract

PURPOSE:To realize high contact capacity and low height in the title relay by using a plunger inserted movably in a hollow bobbin. CONSTITUTION:A solenoid coil 4 wound on a hollow bobbin 3, a plunger 5 inserted movable in the hollow bobbin 3, a permanent magnet 6 incorporated to the plunger 5 and magnetized in the axial direction, and a moval contact spring 21 opposing to the end surface of the plunger 5 are provided, and the movable contact spring 21 in which the movable contact 22 is fixed at the free end is driven by the plunger 5. Since there is no armature or no auxiliary yoke at the outer side of the solenoid coil 4, the height can be made low, and even though the current flowing to the solenoid coil is small, the relay can be operated sufficiently by the interaction with the permanent magnet 6, and the movable scope of the plunger can be also increased. Therefore, a low power consumption type electromagnetic relay with a high contact capacity and a low height can be realized.

Description

[Detailed Description of the Invention] [Summary] Regarding low power consumption electromagnetic relays used in various on-vehicle control devices, the purpose is to provide a low power consumption electromagnetic relay that can have high contact capacity and a low profile. A solenoid coil wound around the outside of a hollow bobbin, a plunger movably inserted into the inside of the hollow bobbin, a permanent magnet integrated with the plunger and magnetized in the axial direction, and a plunger. A movable contact spring is provided facing the end face of the jar, and the movable contact spring having a movable contact fixed to its free end is configured to be driven by a plunger.

[Industrial Application Field] The present invention relates to a low power consumption type electromagnetic relay used in various on-vehicle control devices, and particularly relates to an electromagnetic relay that can have a high contact capacity and a low profile.

Modern automobiles have become increasingly automated and are equipped with control equipment that includes numerous electromagnetic relays. However, unlike electromagnetic relays used in normal control equipment, electromagnetic relays used for such purposes consume less power because they are directly driven by semiconductor integrated circuit elements, and the space in which 4B equipment can be mounted is limited. Therefore, the contact capacity is required to be large (sufficient gap between the contacts when opening is required. There is a need for the development of a low power consumption electromagnetic relay that can be made low profile.

[Conventional technology]

FIG. 2 is a plan view showing a conventional low power consumption type electromagnetic relay.

Conventional low-power electromagnetic relays use permanent magnets, and as shown in the figure, a U-shaped core 11 forming an electromagnet, a coil 13 wound around a coil bobbin 12, and a coil 13 placed opposite the end face of the U-shaped core 11. Arranged L-shaped armature 1
4. It has an auxiliary yoke 16 that is magnetically coupled to the U-shaped core 11 via a permanent magnet 15, and the L-shaped armature 14 when opened is pressed against the side surface of the U-shaped core 11 by the action of the recovery spring 17. ing.

Further, a movable contact spring 21 having one end fixed is disposed at a position facing one side of the L-shaped armature 14.
A fixed contact 24 is fixed to a fixed contact spring 23 at a position opposite to a movable contact 22 fixed to the free end of 1.
．． 25 are arranged. ■The tip of the card 18 implanted in the single-shaped armature 14 is in contact with the movable contact spring 21, and when the movable contact 22 is opened, the movable contact 22 is connected to the fixed contact 2 on the break side.
It is in contact with 4.

In such an electromagnetic relay, when the coil 13 is energized, U
When the core 11 is energized, the other end of the L-shaped armature 14, which is magnetically attracted to the end face of the U-shaped core 11, drives the movable contact spring 21 via the card 18, and the movable contact 22 becomes the fixed contact 25 on the make side. comes into contact with. Even if the magnetic attraction force generated in the electromagnet is small, an electromagnetic relay that uses permanent magnets can sufficiently drive the movable contact spring due to the synergistic effect of the electromagnet and the permanent magnet.

That is, it is possible to configure an electromagnetic relay with low power consumption.

[Problem to be solved by the invention]

However, in conventional low power consumption type electromagnetic relays, the movable range of the L-shaped armature is small, and in miniaturized electromagnetic relays, the distance between the movable contact and the fixed contact in the open state is small. That is,
There has been a problem in that it is not possible to realize an electromagnetic relay with a large contact capacity in which the contacts are sufficiently opened when opened.

An object of the present invention is to provide a low power consumption type electromagnetic relay that can have a high contact capacity and a low profile.

(Means for Solving the Problems) Fig. 1 is a plan view showing a plunger-driven electromagnetic appliance according to the present invention.The same objects are represented by the same symbols throughout the figures.

The above problem is solved by a solenoid coil 4 wound around the outside of a hollow bobbin 3, a plunger 5 movably inserted into the inside of the hollow bobbin 3, and a solenoid coil 4 that is integrated with the plunger 5 and magnetized in the axial direction. permanent magnet 6 and plunger 5
This is achieved by the plunger-driven electromagnetic relay of the present invention, which includes a movable contact spring 21 facing the end face of the movable contact spring 21 and having a movable contact 22 fixed to the free end thereof, which is driven by a plunger 5. .

[Function] In Fig. 1, there is a solenoid coil wound around the outside of a hollow bobbin, a plunger movably inserted into the inside of the hollow bobbin, and a solenoid coil integrated with the plunger and magnetized in the axial direction. The plunger-driven electromagnetic relay of the present invention comprises a permanent magnet and a movable contact spring facing the end face of the plunger, and the movable contact spring having a movable contact fixed to the free end is driven by the plunger. , there is no armature or auxiliary yoke on the outside of the solenoid coil, making it possible to reduce the height, and even if the current flowing through the solenoid coil is small, it operates sufficiently through interaction with the permanent magnet, and the plunger's movable range can be expanded. It is possible. That is, it is possible to realize a low power consumption electromagnetic relay that can have a high contact capacity and a low profile.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to FIG.

As shown in the figure, the plunger-driven electromagnetic relay of the present invention includes a solenoid coil 4 wound around the outside of a hollow bobbin 3, a plunger 5 movably inserted into the inside of the hollow bobbin 3, and a plunger 5. It has a permanent magnet 6 that is integrated with the jar 5 and is magnetized in the axial direction, and a break plate 7 that is disposed at a position facing the end surface of the permanent magnet 6. It is magnetically attracted. Note that the non-magnetized member 8 fixed to the permanent magnet 6 is for adjusting the magnetic attraction force.

Further, a movable contact spring 21 is disposed at a position facing the end surface of the plunger 5, and a fixed contact is disposed at a position opposite to a movable contact 22 fixed to the free end of the movable contact spring 21, one end of which is fixed. Fixed contacts 24.25, which are fixed to the spring 23, are arranged. When the electromagnetic relay is opened, the movable contact spring 21 uses its own restoring force to bring the movable contact 22 into contact with the fixed contact 24 on the break side.

In such a plunger-driven electromagnetic relay, when the solenoid coil 4 is energized to generate a magnetic flux in the hollow bobbin 3 that matches the magnetization direction of the permanent magnet 6, the permanent magnet 6 is separated from the break plate 7 and moved inside the hollow bobbin 3. drawn into,
A plunger 5 integrated with a permanent magnet 6 drives a movable contact spring 21, and a movable contact 22 fixed to the free end comes into contact with a fixed contact 25 on the meter side.

Furthermore, when the power to the solenoid coil 4 is stopped, the driving force of the plunger 5 disappears, and at the same time, a magnetic flux is generated in the hollow bobbin 3 in the opposite direction to the magnetization direction of the permanent magnet 6.
Due to the synergistic effect of the resulting repulsive force and the restoring force of the movable contact spring 21, the permanent magnet 6 is pushed out of the hollow bobbin 3 and magnetically attracted to the break plate 7. Then, the movable contact 22 again comes into contact with the fixed contact 24 on the break side.

A solenoid coil wound around the outside of the hollow bobbin, a plunger movably inserted into the inside of the hollow bobbin, and a permanent magnet integrated with the plunger and magnetized in the axial direction. The plunger-driven electromagnetic relay of the present invention includes a movable contact spring facing the end face of the plunger, and a movable contact spring fixed to the free end of the plunger, which is driven by the plunger. There is no armature or auxiliary yoke, allowing for a low profile, and even if the current flowing through the solenoid coil is small, it operates sufficiently through interaction with the permanent magnet, and it is also possible to widen the plunger's movable range. . That is, it is possible to realize a low power consumption electromagnetic relay that can have a high contact capacity and a low profile.

5 is plunger 7 is the break plate, 21 is a movable contact spring; 23 is a fixed contact spring; respectively.

6 is a permanent magnet, 8 is a non-magnetized member, 22 is a movable contact, and 24.25 is a fixed contact. [Effects of the Invention] As described above, according to the present invention, low power consumption is achieved, which allows for high contact capacity and low profile. type electromagnetic relay.

[Brief explanation of drawings]

FIG. 1 is a plan view showing a plunger-driven electromagnetic relay according to the present invention, and FIG. 2 is a plan view showing a conventional low power consumption electromagnetic relay. In the figure

Claims (1)

[Claims] A solenoid coil (4) wound around the outside of a hollow bobbin (3), a plunger (5) movably inserted into the inside of the hollow bobbin (3), and a plunger (5).
) and magnetized in the axial direction (6)
and a movable contact spring (21) opposed to the end surface of the plunger (5), the movable contact spring (21) having a movable contact (22) fixed to its free end, is connected to the plunger (5). 5) A plunger-driven electromagnetic relay characterized by being driven by.