JP3004852U - Electromagnetic relay - Google Patents

Abstract

(57) [Summary] [Object] The present invention relates to an electromagnetic relay in a so-called hinge-type electromagnetic relay, which prevents deformation of a spring with contacts when it is impacted. [Structure] The upper and lower pieces 3 of the coil frame 3 are arranged above and below the coil 4.
a side piece 10b of the substantially L-shaped contact spring 10 attached to the front surface of the connection base 6 and extended rearward along the upper side of the coil frame 3 and the upper side piece of the coil frame 3 3a is extended inside the vicinity of the bent portion b of the contact spring 10 to a position facing the vertical piece 10a with a slight gap. Then, a spring with a contact 1 is provided on the extension end.
The thick member 16 whose wall thickness increases toward the bent portion b side of 0
To provide.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an electromagnetic relay in a so-called hinge type electromagnetic relay, which prevents deformation of a spring with contacts when it is impacted.

[0002]

[Prior art]

 Conventionally, in a so-called hinge type electromagnetic relay, one side (vertical piece) of the bent side of the contact point bent into a substantially L-shape is hinged, and the other side (horizontal side) of the bent is above the coil. The contacts are switched by extending it in one direction and operating up and down by the electromagnetic force of the coil. Then, in order to improve the spring characteristics of the spring with contacts, hinge the approximately middle part of one side of the bending (vertical piece) and fix the vertical piece above it and the other side of the bending (horizontal piece) around it. It is opened so that objects that restrict the movement of these parts do not come into contact.

[0003]

[Problems to be solved by the device]

 However, in the case of the conventional electromagnetic relay, there is no restraint around the vertical piece above the hinge part and the horizontal piece connected to it, so the spring with contacts can be used especially when an impact load is applied in the horizontal direction. There was a problem that deformation was likely to occur around the bent part of the. Since the assembled electromagnetic relay is usually covered with a case, the outward deformation of the bent portion is prevented by this case, and the inward deformation is a particular problem. There is a problem in that the relay characteristic becomes unstable because the spring characteristic changes due to such deformation and the contact pressure of the contact changes.

[0004]

[Means for Solving the Problems]

 In order to solve such a problem, the present invention attaches a connection base to a coil frame that covers upper and lower sides of a coil with upper and lower pieces, and a vertical piece of a spring with a contact, which is bent in a substantially L shape, on the front surface of the connection base. The cantilevered approximately middle part of the contact, the lateral piece of this spring with contacts is extended backward along the upper part of the coil frame, and the lateral piece is actuated up and down by the electromagnetic force of the coil. In the electromagnetic relay in which the switching is performed, the upper surface piece of the coil frame is extended inside the vicinity of the bent portion of the contact spring and to the position facing the vertical piece with a slight gap. Then, the extended end portion is provided with a thick portion that becomes thicker toward the bent portion of the contact spring.

[0005]

[Action]

 When the upper part of the coil frame is extended so as to face the inside of the bent part of the spring with contacts and the position facing the vertical part with a slight gap, the bent part tries to deform inward. , Abuts against this and prevents deformation. Moreover, since there is a gap, the spring characteristics are not impaired. At this time, if a thick wall portion is formed on the bent end side at the extended end portion, the contact area at the time of deformation is expanded and the deformation prevention effect is enhanced.

[0006]

【Example】

 An embodiment of an electromagnetic relay of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a perspective view of the present electromagnetic relay, and FIG. 2 is a longitudinal sectional view of the same.

As shown in FIGS. 1 and 2, the electromagnetic relay 1 includes a coil frame 3 in which an iron core 2 is inserted in a vertical direction, and an upper surface piece 3 a and a lower surface piece 3 c of the coil frame 3 are front, rear, left and right. A coil 4 is wound around the intermediate body portion 3b as well as overhanging.

A contact portion 5 is provided on the rear side upper surface of the upper surface piece 3a, and a connection base 6 is attached to the lower surface piece 3c. The connection base 6 has a pair of coil terminals 7, 7. A pair of contact terminals 8, 8 are attached and extend downward.

A spring 10 with a contact is attached to the front surface of the connection base 6.

The contact spring 10 is bent into a substantially L-shape by an intermediate bending portion b, and is divided into a vertical piece 10a and a horizontal piece 10b with the bending portion b as a boundary, and the bending portion b is formed. A space h is provided in the center of the space.

The intermediate portion of the vertical piece 10a is fixed to the upper end of the front surface of the connection base 6 by two fastening members 11, and the lower end portion of the vertical piece 10a is tapered to form a COM terminal. It is connected to 10c.

On the other hand, as shown in FIG. 2, the horizontal piece 10b is bent slightly upward from the bent portion b and then extends in the horizontal direction.

Then, on the lower surface of the horizontal piece 10b, there is provided an armature 12 in which one end side is narrow and the other end side is wide and both side portions are cut off obliquely in a plan view. Two fixing members 13 at the middle portion of 10b are integrally connected to the horizontal piece 10b, and a narrow portion is fitted in the space h. Incidentally, the armature 12 is an iron piece.

The tip of the horizontal piece 10b also has a narrow width, and the contact point s provided at the tip of the narrow portion is inserted into the contact portion 5.

As shown in FIG. 2, the contact part 5 has an A contact 14 and a B contact 15 at the top and bottom, and the contact s at the tip of the horizontal piece 10 b is between the A contact 14 and the B contact 15. When the coil 4 is inserted into the coil 4 and no current is applied to the coil 4, it contacts the upper A contact. The A contact 14 and the B contact 15 are connected to the pair of contact terminals 8 and 8, respectively.

By the way, the tip side of the upper surface piece 3a of the coil frame 3 is extended toward the direction of the contact spring 10, and the thick member 16 is attached to the upper part of the extended end, and the tip surface is vertically It is placed close to the back surface of the piece 10a.

That is, the upper surface piece 3a and the front end surface of the thick member 16 come close to each other inside the vertical piece 10a near the bent portion b of the contact spring 10.

Further, a portion not including the terminals 7, 8, 10c of the electromagnetic relay as described above is covered with a case (not shown).

The operation of the electromagnetic relay 1 configured as above will be described.

Before the current is applied to the coil 4, the contact s of the horizontal piece 10 b of the contact spring 10 is in contact with the A contact point 14, and when the current is applied to the coil 4, the armature 12 is moved to the coil 4 side. As a result, the contact s of the horizontal piece 10b integrated with the armature 12 is also switched to the lower B contact 15. When the current to the coil 4 is cut off, the lateral piece 10b returns to the upper side by the spring force and is switched to the A contact point 14.

At this time, since no other member is in contact with the vertical piece 10a and the horizontal piece 10b above the fixing member 11 for fixing the spring 10 with contacts to the connection base 6, it is free to move. Good spring characteristics.

By the way, the electromagnetic relay 1 may be used as a component of a device or the like that is easily subjected to vibration or impact, and it is necessary to exhibit excellent characteristics of vibration resistance and impact resistance. As described above, conventionally, when a shock is applied from the direction A of FIG. 2, it is a problem that the bent portion b of the contact spring 10 is deformed inward.

However, in the case of the present invention, since the upper surface piece 3a of the coil frame 3 and the thick member 16 are faced inside the vertical piece 10a near the bent portion b, the bent portion b is deformed inward. Even if an attempt is made, the end faces 3a and 16 are not contacted and prevented from being deformed.

At this time, the thick member 16 widens the contact range in the direction of the bent portion b, so that the deformation suppressing effect is high.

On the other hand, with respect to the impact from the direction opposite to the direction A in FIG. 2, the deformation is prevented in a case not shown.

By preventing the contact spring 10 from being deformed in this manner, the contact load can be properly maintained and stable relay characteristics can be maintained.

[0027]

[Effect of device]

 As described above, in the electromagnetic relay of the present invention, the upper surface piece of the coil frame is extended toward the inner side of the bent portion of the cantilever type spring with a cantilever, which is bent in a substantially L shape, and is close to the vertical piece. Since they are made to face each other, it is possible to effectively prevent the bent portion from being deformed inward by a shock. Therefore, even when it is used as a component of equipment that is susceptible to vibration or shock, it always exhibits stable relay characteristics.

[Brief description of drawings]

FIG. 1 is a perspective view of the electromagnetic relay.

FIG. 2 is a vertical sectional view of the same.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electromagnetic relay 3 Coil frame 3a Top piece 4 Coil 5 Contact part 6 Connection base 10 Spring with contact 10a Vertical piece 10b Horizontal piece 16 Thick member b Bent part

Claims (2)

[Scope of utility model registration request] 1. A connection base is attached to a coil frame that covers upper and lower sides of a coil with upper and lower pieces, and a substantially middle portion of a vertical piece of a spring with a contact, which is bent into a substantially L-shape, is attached to a front surface of the connection base. In addition to being cantilevered, the horizontal piece of the spring with contacts is extended rearward along the upper part of the coil frame, and the horizontal piece is operated up and down by the electromagnetic force of the coil to switch the contacts. In the electromagnetic relay, the upper surface piece of the coil frame is extended inside the vicinity of the bent portion of the contact spring and to a position facing the vertical piece with a slight gap. . 2. A thick-walled portion whose thickness increases toward the bent portion of the spring with a contact is provided at the extending end of the upper surface piece of the coil frame. Electromagnetic relay described.