JPH082905Y2 - Electromagnetic contactor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention provides an electrical connection between a coil and a terminal plate of a coil terminal, including a connection piece attached to a coil bobbin and a spring piece fixed to the terminal plate. The present invention relates to an electromagnetic contactor which is elastically contacted.

[Prior Art] A conventional electromagnetic contactor of this type is shown in FIG. In this electromagnetic contactor, a case 1 is formed by a box-shaped body 2 having an open upper surface and a cover 3 attached to the body 2, and the coil bobbin 6 has a coil 7 wound therein. A central piece is inserted and a substantially E-shaped fixed iron core 4 and a movable iron core 5 are arranged opposite to each other and housed in a case 1. A movable frame 10 is integrally fixed to the upper portion of the movable iron core 5, and a movable portion including the movable iron core 5 and the movable frame 10 is urged upward by a return spring 19 provided on both sides.
A plurality of movable contact plates 9 having movable contacts 8 fixed to both sides are attached to the movable frame 10, and fixed contacts 12 are fixed to terminal plates 13 of a plurality of terminals 15 provided on both sides of the cover 2. There is.

In this electromagnetic contactor, when the coil 7 is energized, the movable iron core 5 is attracted to the fixed iron core 4 against the spring force of the return spring 19, and at this time, the movable iron core 5 and the movable frame 10 move downward to move the movable contact. 8 contacts (or opens) the fixed contact 12. Then, when the energization of the coil 7 is stopped, the movable portion is returned upward by the spring force of the return spring 19, and the movable contact 8 is fixed.
Separate (or contact) from.

[Problems to be Solved by the Invention] However, in this type of electromagnetic contactor, as shown in FIG. 5, both ends of the coil 7 are connected to the flange portion 6a of the coil bobbin 6 around which the coil 7 is wound. Attach the connection piece 21,
Terminal plate 16 of the coil terminal 16 for connecting the conducting wire to the coil 7
The spring piece 20 'fixed to a has a structure for elastically contacting the connecting piece 21 to electrically connect the terminal plate 16a and the connecting piece 21. The assemblability of the electromagnetic contactor, the replacement of the coil 7, etc. The workability of is improved.

However, like the conventional electromagnetic contactor of this kind, the spring piece 2
0'is formed by a rectangular flat plate and has a slit 22
If the structure is simply formed (the structure of the spring piece 20 'is shown in Fig. 6), it is against the force (force exerted by vibration or impact) from an unnatural direction (oblique, twisting direction, etc.). Spring piece 2
There is a problem that it is difficult to stabilize the contact between 0'and the connecting piece 21.

The present invention has been made in view of the above points, and an object of the present invention is to provide an electromagnetic contactor capable of obtaining stable contact between a spring piece and a connecting piece even against a force from an unnatural direction. To provide.

[Means for Solving the Problems] In order to achieve the above-mentioned object, the present invention has a center portion between a base end portion fixed to a terminal plate of a spring piece and a tip end portion contacting a connection piece. The terminal plate is formed obliquely in the vicinity of the center line so that the end surface of the terminal plate is in contact with the terminal plate, and the tip part is divided by a slit having a length that gives the tip part appropriate rigidity.

[Operation] The present invention is configured as described above, so that the rigidity of the root portion of the split piece by the slit of the tip portion becomes strong, and the vicinity of the central portion of this root portion is formed by the end surface of the coil terminal plate. By supporting and acting the force exerted on one side of the split piece so that the other split piece cancels out, the displacement amount of each split piece due to the force from an unnatural direction is reduced, and the spring piece is connected to the connection piece. The stable contact of is obtained.

[Embodiment] FIGS. 1 to 3 show an embodiment of the present invention. As shown in FIG. 1, the spring piece 20 of the present embodiment has a slanted central portion between a base end portion which is caulked and fixed to the terminal plate 16a and a tip end portion which contacts the connection piece 21, Slit in the center of the tip
22 is formed so that the tip portion has elasticity. In addition, the length of the slit 22 is formed in consideration of the point that the tip end portion has an appropriate rigidity, and the center portion of the center line of the tip end portion (shown by a chain line in FIG. 1) is formed. It is formed so that the end surface of the terminal plate 16a is in contact with the vicinity thereof.

The operation when a force in an unnatural direction is applied to the conventional spring piece 20 'and the spring piece 20 of this embodiment will be described below.

For example, when the force P shown in FIG. 7 (b) is applied only to one piece (a in FIG. 7 (a)) of the tip of the conventional spring piece 20 ', the other piece of the tip (7th The relationship between the amount of displacement shown in (b) of FIG. 8A and the length L of the slit 22 is calculated as shown in FIG.

In the same manner as in the above case, when the relationship between the other piece B of the tip portion and the length L of the slit 22 of the spring piece 20 of this embodiment is determined, as shown by the broken line in FIG. In this case, the displacement amount of the other spring is smaller than that of the conventional spring spring shown by the solid line in the figure. In other words, in the case of this embodiment, the rigidity of the root portions of one side and the other side is strong, so the displacement amount of the one side is small. Further, this action is such that the spring piece 20 is supported by the end surface of the terminal plate 16a as shown in FIG. 2 (b), so that the force applied to one piece acts so that the other piece cancels it. The effect is increased. Therefore, in the present embodiment, a contact that is much more stable than the conventional one is obtained.

[Advantages of the Invention] As described above, the present invention is designed so that the center portion between the base end portion fixed to the coil terminal plate of the spring piece and the tip end portion that contacts the connection piece is coiled near the center line of the tip end portion. It is formed diagonally so that the end faces of the terminal board are in contact with each other, and the tip is divided by a slit with a length that gives the tip proper rigidity. At the same time, the vicinity of the center of the root portion is supported by the end surface of the coil terminal plate so that the force exerted on one side of the split piece is canceled by the other split piece, and the split piece due to a force from an unnatural direction acts on the split piece. Stable contact of the spring piece with the connecting piece can be obtained by reducing the displacement of each.

[Brief description of drawings]

FIG. 1 is a perspective view of a terminal plate to which a spring piece of one embodiment of the present invention is fixed, FIGS. 2 (a) and 2 (b) are explanatory views of the action of the spring piece, and FIG. 3 is a slit length and displacement amount. 4 (a) to 4 (c) are front views in which a part of the electromagnetic contactor is cut away, side sectional views, sectional views showing other main parts, and FIG. FIG. 6 is an exploded perspective view of an essential part showing a coil terminal connection structure, FIG. 6 is a perspective view of a terminal plate to which a conventional spring piece is fixed, and FIGS. 7 and 8 show one divided piece of the conventional spring piece. It is explanatory drawing in the case of applying force, and explanatory drawing which shows the relationship between the slit length and displacement amount as a result. 6 is a coil bobbin, 6a is a collar, 7 is a coil, 16 is a coil terminal, 16a is a terminal plate, 20 is a spring piece, 21 is a connecting piece, 22 is a slit, and a and b are divided pieces.

Claims (1)

[Scope of utility model registration request] 1. A connecting piece, in which both ends of the coil are connected to each other, is attached to a collar portion of a coil bobbin around which the coil is wound,
In an electromagnetic contactor in which a spring piece fixed to a terminal plate of a coil terminal for connecting a current-carrying wire to a coil elastically contacts the connecting piece to electrically connect the terminal plate and the connecting piece, the terminal of the spring piece is The center between the base end that is fixed to the plate and the tip that contacts the connection piece is formed diagonally so that the end surface of the terminal plate contacts the center line of the tip, and the tip has appropriate rigidity. An electromagnetic contactor characterized in that the tip portion is divided by a slit having a length that gives