JPS63237317A - Contactor - 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 Technical Field The present invention relates to a contact device suitably implemented in an electromagnetic #1 electric appliance or a contactor, and more particularly, it relates to a
, 'f, when using a load in which a large inrush current flows, the contact device is preferably implemented.

Background! Figure 4 shows the contact point r due to the advance technique. 125 is a perspective view showing the structure of 125. FIG. Connection terminals 22b, 2 are provided on the insulating substrate 21.
At least one pair of movable contact member 22 and fixed contact member 23, which are integrally formed with 3b, are arranged in parallel and facing each other. After fixing to the movable contact member 22, a movable contact 22a and a fixed contact 23a are fixed to the α member 23, respectively, and a card member (not shown) presses the movable contact member 22 in the direction of the arrow ε, and the movable contact 22a and the fixed contact 23a are electrically connected.

FIG. 5 is a diagram for explaining the operation of the contact 1 device 25 according to the prior art. In FIG. 5, parts corresponding to those in tpJ4 are given the same reference numerals. When the movable contact 22a and the fixed contact 23a are electrically connected, it is equivalent to forming two adjacent and parallel conductors. If the current flowing through the movable contact member 22 when conducting is Ia, and the current flowing through the α member 23 after being fixed is rb, and each flows in the direction shown in the figure, the current Ia.

11+ are naturally equal in magnitude and opposite in direction. The above-mentioned current Iatlb surrounds the movable contact member 22 and the fixed contact member 23, respectively, and a magnetic flux φa according to the right-handed screw rule is generated.
, φb are generated as shown. The magnetic flux φa surrounding the movable contact member 22 and the magnetic flux φb surrounding the fixed contact member 23 are:
Since they are in the same direction in the opposing plane p1, the opposing plane p1
The magnetic flux density B1 is smaller than the magnetic flux densities B 2 and B 3 of the non-opposing surfaces p2 @p3. Therefore, after the movement, the electromagnetic repulsion forces Ga, GL+ (indicated by the reference mark G when used collectively) are generated between the α member 22 and the fixed contact member 23.
is generated in a direction perpendicular to each surface, and this electromagnetic repulsive force G causes an operational malfunction in the contact device i25.

For example, when using the above-mentioned contact device in an electromagnetic relay or contactor to conduct electricity between the contacts and supply power to a load, if the load is a capacitor or an incandescent lamp, the load impedance immediately after energization is is equivalent to a short circuit state, and therefore a large inrush current flows in at the same time as the contact 'oN'.
An electromagnetic repulsion force proportional to the system is generated. Since this electromagnetic repulsive force acts in the direction of separating the contacts, the contacts perform an unsteady movement called bouncing or chattering until they reach a steady state, and as the contacts separate from each other, an arc occurs. This caused problems such as contact welding, leading to accidents and shortening the life of the contact device. Therefore, loads with large inrush currents such as incandescent lamps and capacitors should be loaded with rflf1r! 1, a contact device that operates stably has been desired.

Purpose The present invention has been made in view of the above-mentioned technical problems, and provides a contact that stabilizes and secures the operation during conduction at the t and point points, prevents welding of the contacts, and achieves RI and a longer service life. The purpose is to provide equipment.

Embodiment FIG. 1 is a side view showing the structure of an electromagnetic relay equipped with a contact device according to an embodiment of the present invention. The electromagnetic relay 1 is a first
The movable contact member 2 as an 11-point member, the fixed contact member 3 as a second contact member, and the drive! ! An electromagnet 91 consisting of a contact device 5 consisting of a card member 4 which is a J1 member, a yoke 6, an iron core 7, and a coil 8 wound around the iron core 7. When the electromagnet 9 is energized, the armature 10.7 is formed in a roughly inverted shape, and one end 10a facing the iron core 7 can be displaced in the direction indicated by the arrow a by its electromagnetic attraction force. When the bent portion 10b of the armature 10 is pressed by a spring force and the electromagnet 9 is not energized, it means that the support pin that supports the end 1!1s 10a of the armature 10 facing the iron core 7 in a direction away from the iron core 7. It consists of 11 etc.

In the movable contact member 2, the protrusion 4& of the card member 4 is loosely inserted into a small hole 2b formed approximately at the center in the longitudinal direction, so that the movable contact member 2 passes through the protrusion 4a. It is supported so that it can be angularly displaced around an axis perpendicular to the plane of the paper, and the upper end in FIG. ¥, 2a
is fixed by casino or welding, and the lower part is connected to the terminal member 2d via the elastic piece 2c. The fixed contact member 3 will be described later.

When the electromagnet 9 is excited, the card member 4 moves the armature 10
is angularly displaced in the direction indicated by the arrow a, and in response to this displacement, the movable contact member 2 is pressed from behind toward the fixed contact member 3 in the direction indicated by the arrow b.

These contact devices 5 and electromagnets 9 are disposed at predetermined positions on the insulating base 12, and i number of connection terminals 13, which are integrally formed with the contact device 5 and the electromagnets, respectively, are disposed on the insulating base 12. 12 and is pulled out downward in Figure 1.

FIG. 2 is a perspective view showing the structure of the fixed contact member 3 of this embodiment. In the fixed contact member 3, for example, a metal piece having a width of 5-1 is wound a plurality of times (in this embodiment, 2.5 times) to form a coil portion 3+3. After fixing, 7ζ3a is fixed, and the other end is attached to the terminal 8 member 3.
cl:J! ! and this ζ) is -externally formed.

Now, a current 11 is applied to the fixed contact member 3 via the fixed rear stand 3a.
Assuming that the current 11 flows in the direction shown in the figure, the magnetic flux φ1. φ2. φ3...
・(Indicated by the reference mark φ when used generically) occurs as shown in the figure. These magnetic fluxes φ are the hollow part 3 of the coil part 3I).
d, a magnetic field in the direction indicated by arrow A is generated in this portion, and the strength of the magnetic field is proportional to the inflowing current 1 and the number of turns of the coil portion 3b.

3rd U:! J is a diagram for explaining the operation of the contact device of this embodiment. The movable contact member 2 is pressed from the direction of the arrow by a drive member (not shown), and the movable contact 2a and the fixed contact 3a come into contact and conduct, and the current I flows to the movable contact member 2.
It is assumed that the air flows from the air into the fixed contact member 3 through the contacts 2a and 3a in the direction shown in the figure. Possible! ! ! In the IJ contact member 2, a small hole 2b bored in the center is placed approximately at the center of the coil portion 3b, and its length direction is approximately parallel to one side of the coil portion 3b.

In the coil portion 3b of the fixed contact member 3, a magnetic field B due to the current I is generated in a direction perpendicular to the plane of the paper from the front to the back of the paper as shown. Therefore, it is possible to place it in a direction perpendicular to the above magnetic field B! The IJ contact member 2 has a current I flowing therein.
and magnetic field B, it receives electromagnetic force F in the direction shown by arrow f. This electromagnetic force F is generated when the points 2a and 3a conduct and current flows in as described above, so the movable contact member 2 continues to generate the electromagnetic force that presses 3 to the fixed #5 even after the contacts are conductive. F is applied thereto, and a pressing force from the driving member is further added to this.

As described above, the movable contact member 22 is disposed so as to be angularly displaceable about the axis perpendicular to the plane of the paper through the nine small holes 2b provided approximately at the center of the movable contact member 22.
Even after the contact between the fixed contact 23a and the fixed contact 23a, the substitute member 22
is angularly displaced clockwise around the small hole 2b as shown by arrow C, and as a result, the surface of the movable contact 22a rotates as if rolling on the surface of the fixed contact 23& (so-called rolling). ), Therefore, the contact between the fixed contact 23a and the fixed contact 22a after the movement is greatly improved.Moreover, in this embodiment, the opposing surfaces of the contact parts as in the prior art are separated from the contact and its vicinity. Since it does not have any electromagnetic force, the generation of electromagnetic repulsion □ is slight, and moreover, the electromagnetic force F mentioned above is
This prevents unstable operations such as bounce and chattering caused by electromagnetic repulsion, as well as arcs caused by unstable operations, and contamination and damage to contacts caused by the arc.

Effects As described above, the contact device according to the present invention has a structure in which the driving member presses the first contact member toward the second contact member to conduct electricity between the contacts, and the second contact member is coiled. The electromagnetic force that acts in the direction of pressing the first contact member toward the second contact member is created by the current flowing in after the contact is formed and conducts. In addition, since the second contact member is disposed so as to be angularly displaceable about the center part in the longitudinal direction,
After direct contact, the contact fixed to the first contact member side rotates so as to roll on the contact surface fixed to the second contact member side. Therefore, the contact between the contacts is greatly improved, and unstable operations such as bounce and chatter are prevented. This prevents arcing caused by this, and contamination and damage to the contacts caused by the arc, resulting in high stability and reliability. Sexual contact, α device is realized.

[Brief explanation of drawings]

tjIJ1 is a side view showing the structure of three electromagnetic relays equipped with a contact YTC arrangement according to an embodiment of the present invention, FIG. 2 is a perspective view showing the structure of the fixed contact member of this embodiment, and FIG. 4 is a perspective view showing the structure of a contact device according to the prior art, and FIG. 5 is a diagram for explaining the operation. 1...Electromagnetic! ? 4 devices, 2, 22... movable contact member,
2a. 22a... After movable, ζ, 3, 23... Fixed contact member, 3a. 23a...Fixed contact, 4...Card member, 5.25
...Contact device, 12...Insulation base, φa, φb, φ
...magnetic flux, F...electromagnetic force, G...electromagnetic repulsion agent Patent attorney Keishi Saikyo Figure 1 Figure 4 Figure 5 Procedural amendment July 8, 1988

Claims (1)

[Claims] A contact device comprising at least a pair of contact members to which mutually opposing contacts are fixed, and having a structure in which a first contact member is pressed and driven toward a second contact member by a driving member to conduct and energize between the contacts. , a contact device characterized in that the second contact member is formed in a coil shape, and generates an electromagnetic force that acts in a direction to press the first contact member toward the second contact member by a current flowing in after the contact is conductive. .