JPH0644441B2 - Electromagnetic contactor - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a structure for mounting an accessory such as a surge suppressor on an electromagnetic contactor, and more particularly to attaching and detaching the accessory after mounting the electromagnetic contactor on a panel. The present invention relates to an electromagnetic contactor having a suitable engaging portion.

[Prior Art] As for the conventional mounting structure of a surge suppressor to an electromagnetic contactor, as shown in JP-B-51-29954, the surge suppressor is placed on the bottom surface of the main body of the electromagnetic contactor to mount the contactor. It was mounted integrally with the electromagnetic contactor by sharing the screw. Further, regarding the mounting of the surge suppressor to the contactors having different mounting dimensions, as described in Japanese Utility Model Publication No. 52-17730, mounting was performed integrally with the electromagnetic contactor.

[Problems to be solved by the invention]

The above-mentioned conventional technology does not require a special space for mounting the surge suppressor, but since the surge suppressor is mounted on the bottom surface of the electromagnetic contactor and mounted with the same screw as the contactor mounting screw, the height of the contactor after mounting is high. However, when mounting the surge suppressor after mounting the electromagnetic contactor on the control panel, etc., or when the surge suppressor was previously installed, When the was removed after mounting on the panel, the contactor body was also removed, and it was very troublesome to attach and detach the surge suppressor. Also, since it is necessary to align the mounting hole of the electromagnetic contactor with the mounting hole of the surge suppressor, it is necessary to make the external shape almost the same as the bottom surface of the applicable electromagnetic contactor, and it is not possible to reduce the size of the surge suppressor alone. However, in order to apply it to a contactor with different mounting dimensions, there is a problem that it is difficult to share it, such as requiring separate parts.

An object of the present invention is to provide an electromagnetic contactor which improves the above-mentioned drawbacks and allows accessories such as surge suppressors to be easily attached / detached even after being attached to a control panel or the like, and enables miniaturization and sharing of the accessories. To provide.

[Means for solving problems]

The purpose of the above is to attach the accessory near the bottom of the side surface of the electromagnetic contactor, and elastically engage the engaging portion provided on the side surface of the electromagnetic contactor with the engaging portion provided on the case of the electromagnetic contactor. It is achieved by fixing the accessory to the contactor side without.

[Action]

The surge suppressor and other accessories are not attached to the bottom of the electromagnetic contactor with the contactor attachment screws, but are attached separately to the side of the outer frame, so the contactor and accessories can be attached separately.
Further, since the outer shape of the accessory does not depend on the outer shape of the bottom surface of the contactor or the mounting dimension, the accessory can be shared for electromagnetic contactors having different mounting dimensions and the accessory can be easily downsized.

Also, since the surge suppressor is fixed to the contactor without screws by elastically deforming the elastic tongue and engaging and engaging the engaging claw with the engaging protrusion, it is possible to elastically deform the tongue even when detaching. The engagement can be released, the surge suppressor can be easily attached and detached, and the mounting workability is improved.

Further, a first engaging portion is formed on the side surface of the electromagnetic contactor,
Since the accessory is engaged and fixed to the first engaging portion from the direction facing the side surface of the electromagnetic contactor, the accessory can be easily attached and detached even after the control panel or the like of the electromagnetic contactor is attached.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. In this embodiment, the accessory 1 is a surge suppressor in which circuit components are housed in the case 2, and the second engaging portion 3 is an outwardly projecting engaging pawl 4 having a slope 4'on the A-direction surface at the tip. Two elastic tongues are formed integrally with the case 1 on one surface of the case 2 using a plastic resin. Reference numeral 5 denotes a retaining protrusion provided on the upper part of the mounting surface of the tongue piece 3 of the case 2, and is integrally formed with the case 2 similarly to the tongue piece 3. Reference numeral 6 is a lead wire electrically connected to the circuit component of the surge suppressor 1.

On the other hand, 9 is a concave portion that is a second engaging portion provided on the upper surface of the lower outer frame 10 of the electromagnetic contactor 7 and has openings on the bottom surface and side surfaces. On both sides of the inner surface of the concave portion, engaging projections 11 are provided on the inside corresponding to the tongue piece 3 and having an inclined surface 11 'on the A'direction surface. Further, a mounting concave surface 12 of the surge suppressor 1 is provided in the concave portion 9 forming portion of the outer frame 10. The dimensional relationship of l ₁ , l ₂ , l ₃ , l ₄ , l ₅ , l ₆ shown in FIGS. ₂ , ₃ , and ₆ is as follows.
l ₁ , l ₄ and l ₆ are slightly smaller than the corresponding l ₂ , l ₃ and l ₅ , respectively, and l ₁ <l ₂ , l ₄ <l ₃ and l ₆ <l ₅ . In such a configuration, as shown by the solid line in FIG. 6, when the tongue piece 3 of the surge suppressor 1 is inserted into the recess 9 of the outer frame 10 and further imprinted in the direction of arrow A, the tongue piece 3 is inclined 4 Elastically deforming inward along ′ and 11 ′, the engaging claw 4 rides over the engaging projection 11 and then the claw 4 and the projection 11 engage with each other as shown in FIG. Further, at this time, as shown in FIG. 4, the retaining projection 5 of the case 2 engages with the upper surface of the mounting projecting surface 12 provided on the outer frame 10, and the surge suppressor does not come out downward. In this way, the surge suppressor 1 is fixed to the electromagnetic contactor 7. Then, the lead wire 6 is
By connecting to the coil terminal 8 as shown in the figure, the surge voltage when the exciting coil of the electromagnetic contactor 7 is deenergized can be suppressed. On the other hand, when removing the surge suppressor, after removing the lead wire 6 from the coil terminal 8, the surge suppressor 1 is pressed in the direction of arrow B as shown by the chain line in FIG.
One of them is elastically deformed, and the claw 4 and the protrusion 11 of the other tongue piece 3 are
After the engagement is released, the claw 4 and the projection 11 are also disengaged by rotating in the direction of the arrow B ', and the surge suppressor 1
Can be removed.

According to this embodiment, since the tongue piece is integrally formed with the case made of the plastic resin, it is possible to provide a surge suppressor mounting structure that is easy to mount and dismount and is inexpensive, without using a separate part. Also,
Since l ₃ is made slightly larger than l ₄ , the tongue piece 3 is slightly elastically deformed and is in a state of being attached by pressing the protrusion 11, so that the surge suppressor can be attached more firmly without backlash.

The accessory is not limited to the surge suppressor, and may be a display 14 incorporating a light emitting element 13 as shown in FIG. The light emitting element 13 may be an LED, a discharge lamp such as a neon tube, or a light bulb.

Further, the accessory may be one in which a control circuit for controlling the operation of the electromagnet is incorporated, or may be a power IC in which an operation control circuit for the electromagnet is incorporated.

When connecting the lead wire of the accessory 1 to the connection terminal 8 on the surface opposite to the surface on which the accessory 1 is attached, as shown in FIG. 9, insert a lead wire having an opening on the side surface toward the bottom surface. The holes 7a may be provided. The tenth example of the shape of the insertion hole 7a
Shown in the figure. With respect to the insertion hole 7a, the width l _{7 of the} end portion is l ₇ <l ₈ with respect to the width l _{8 of the} opening. L ₇ is formed to be equal to or slightly larger than the outer shape of the lead wire 6, and l ₈ is the lead. It is slightly smaller than the outer shape of the line 6. Therefore, the lead wire 6
Is fixed in the insertion hole 7a when it is press-fitted,
As shown in FIG. 12, the lead wire 6 is held in the insertion hole 7a so as not to approach the mounting leg 7b, and prevents the lead wire 6 from being sandwiched between the bottom surface of the electromagnetic contactor and the board or the like at the time of mounting. It can be installed and has excellent workability.

According to the above embodiment, the accessory can be mounted without increasing the mounting height of the electromagnetic contactor.

The shapes of the first and second engaging portions are not limited to those described above, and the second engaging portion is a spherical body formed at the tip of the rod-shaped supporting member in the case 2 and divided by the slit. ,
The first engaging portion may be a round hole formed on the side surface of the electromagnetic contactor. In addition, the first engaging portion is a pair of tongue pieces protruding from the side surface of the electromagnetic contactor, and the second engaging portion is a concave portion that is formed on the side surface of the case 2 and engages with the tongue piece. The tongue may hold the case.

〔The invention's effect〕

According to the present invention, it is possible to obtain an electromagnetic contactor in which an accessory can be easily attached and detached even after being attached to a control panel or the like, and the accessory can be downsized and shared.

[Brief description of drawings]

FIG. 1 is a perspective view showing an attachment of an electromagnetic contactor and accessories in an embodiment of the present invention, and FIG. 2 is a perspective view showing an example of a first engaging portion formed near a bottom surface of a side surface of the electromagnetic contactor. Figure, third
FIG. 4 is a perspective view showing the appearance of the accessory, FIG. 4 is a side sectional view showing the engagement between the accessory and the electromagnetic contactor, and FIG. 5 is a plan sectional view showing the engagement between the accessory and the electromagnetic contactor. , FIG. 6 is a horizontal cross-sectional view showing the state of the engaging portion when the accessory is attached and detached, FIG. 7 is a perspective view showing the case where the accessory is a display, and FIG. 8 is a view from the accessory to the coil terminal. FIG. 9 is a plan view showing connection of lead wires, FIG. 9 is a side view showing a case where a lead wire insertion hole is provided on the bottom surface of an electromagnetic contactor, and FIG. 10 is a front view showing an example of the lead wire insertion hole, and FIG. , FIG. 12 is a side view and a bottom view of the case where the lead wire is held in the lead wire insertion hole, respectively. 1, 14: accessory, 2: case, 3: second engaging portion,
7: electromagnetic contactor, 7c: side surface of electromagnetic contactor, 7d: bottom surface of electromagnetic contactor, 9: first engaging portion

Claims (1)

[Claims] 1. An electromagnetic contactor configured to detachably fix an accessory having an element exerting a predetermined action with respect to the operation of the electromagnetic contactor to a side surface of the electromagnetic contactor, wherein The side surface includes a first engaging portion near the bottom surface of the electromagnetic contactor, and the case includes a second engaging portion that elastically engages with the first engaging portion. Characteristic electromagnetic contactor.