KR20150053947A - Electromagnetic contactor - Google Patents

Abstract

In the present invention, the stationary contact 31 is formed by integrally forming the fixed contact 31d, the male terminal 31b and the engaging portions 31e and 31f. Then, the terminal chamber 20a is provided with press-fitting engagement portions 27, 29 for engaging the engaged portions by press-fitting. The press-fitting direction of the engaging portions 31e and 31f with respect to the press-fitting engaging portions 27 and 29 is different from the direction in which the female terminal component is pulled out and connected to the other direction Respectively.

Description

ELECTROMAGNETIC CONTACTOR

The present invention relates to an electromagnetic contactor, and more particularly, to a fixed contact mounting structure for a casing.

In the electromagnetic contactor, an electromagnet is housed in a first case, and a contact portion is accommodated in a second case which is superimposed on and connected to the first case.

In the second case, a plurality of terminal chambers (terminal chambers) on the power source side and a plurality of terminal chambers on the load (load) side are provided so as to face each other on the back side, , And a movable contact support body of a moving contact portion is accommodated by applying a voltage to the winding of the electromagnet. In each terminal chamber, fixed contacts are accommodated (for example, see Patent Document 1).

8 and 9 show a conventional electromagnetic contactor having a structure similar to that of Patent Document 1 and having a male terminal such as a tab terminal and a fixed contact on a fixed contact.

The electromagnetic contactor shown in Fig. 8 has a first case 2 housing an electromagnet 1, a second case provided on an upper portion of the first case 2 and provided with a plurality of terminal chambers 3 4). In the second case 4, a movable contact supporter 5 constituting a contact portion is movably housed, and fixed contactors 8 are attached to a plurality of terminal seals 3. [ The stationary contactor 8 includes a stationary contact 6 constituting a contact portion connected to a movable contact (not shown) of the movable contact supporter 5 and a fixed contact 6 constituted by a tab terminal (7). These fixed contacts 8 are inserted from the lower side of the second case 4 opened at the lower side and are mounted such that the tab terminals 7 extend through the terminal chamber 3 and extend upward.

The electromagnetic contactor shown in Fig. 9 is mounted on the terminal block 12 of the terminal chamber 3 provided in the second case 4 with a fixed contact (Fixing piece) 13b of the first part 13 having the first terminal 13a and the tab terminal 14a extending upward from the terminal chamber 3, And the fixing pieces 13b and 14b and the terminal block 12 are integrally fixed by a fixing screw 15. [

Japanese Patent Application Laid-Open No. H6-310010

8, the lower side of the second case 4 is opened so that the second case 4 is opened to secure the insulation distance of the coils constituting the stationary contactor 8 and the electromagnet 1, It is necessary to set the height H of the magnetic contact H to a large value and the size of the outer diameter is increased.

Further, as shown in Fig. 9, the fixed contacts are composed of the first component 13 and the second component 14, which poses a problem in terms of assembly efficiency.

9, when the connection with the female terminal part (not shown) is released, a pulling load indicated by an arrow acts on the tab terminal 14a of the second component 14 The pulling load is the same direction as the direction in which the second component 14 (and the first component 13 are fixed to the terminal block 12 via the fixing screw 15). Repetition of the pulling operation may affect the fixing strength of the first component 13, the second component 14, and the terminal block 12.

Accordingly, the present invention has been made in view of the above-mentioned unsolved problem of the prior art, and it is an object of the present invention to provide a small- And the fixed strength of the electromagnetic contactor is not lowered.

In order to achieve the above object, an electromagnetic contactor according to an aspect of the present invention includes: a terminal on a power source side and a terminal on a load side facing the back side, a movable contact support body accommodated in a space between the terminals, And a fixed contact having a male terminal connected to a female terminal component and a fixed contact as the terminal is mounted on the terminal chamber, An electromagnetic contactor having a casing, wherein the fixed contact, the male terminal, and a to-be-engaged portion are integrally formed as a fixed contact, and the to-be-engaged portion is press- And the press-fit engaging portion of the engaging portion with respect to the press-fitting engaging portion is engaged with the male terminal portion by pulling out and connecting the female terminal portion to the male terminal Was in a different direction with respect to the direction.

According to the electromagnetic contactor of the above embodiment, since the male terminal and the stationary contact are integrally formed, labor for assembling the stationary contactor is omitted, and the assembling efficiency of the electromagnetic contactor can be improved. In addition, since the engaging direction of the engaged portion with respect to the press-fit engaging portion is set to be different from the direction in which the female terminal component is pulled and connected to the male terminal, the fixing strength of the fixed contact can be sufficiently secured.

In the electromagnetic contactor according to one aspect of the present invention, the engaged portion provided on the stationary contactor includes a first press-fit portion formed in the vicinity of the male terminal, and a second press- The press-fit engaging portion provided in the terminal chamber includes a first press-fit space in which the first press-fit portion is press-fitted and a second press-fit space in which the second press-fit portion is press-fitted .

According to the electromagnetic contactor of the above aspect, there is a case where an external force (prying force) acts on the male terminal, but the second to-be-inserted portion and the second press- Since a large reaction force moment acts on the external force, the fastening strength against the external force can be sufficiently secured.

The electromagnetic contactor according to one aspect of the present invention is provided with a slip prevention portion for preventing the fixed contact, into which the engaged portion is press-fitted, from falling out in the direction opposite to the press-in direction.

According to the electromagnetic contactor of the present invention, the stationary contact is formed by integrally forming the stationary contact, the male terminal and the engaging portion, and the press-fitting engaging portion for engaging the engaging portion with the engaging portion is provided in the terminal chamber, Since the engaging direction of the engaged portion with respect to the engaging portion is set to be different from the direction in which the female terminal component is pulled and connected to the male terminal, the assembling efficiency can be improved by reducing the number of parts, It is possible to provide an electromagnetic contactor in which the fixing strength of the stationary contactor with respect to the casing is not lowered even if the drawing operation of the terminal component is repeated.

1 is a perspective view showing an electromagnetic contactor having a tab terminal on a fixed contact.
2 is a cross-sectional view showing the internal structure of the electromagnetic contactor.
3 is a view showing a contact portion of the electromagnetic contactor.
4 is a view showing the inside of the terminal chamber of the electromagnetic contactor.
5 (a) is a cross-sectional view along the line A-A in Fig. 4, and Fig. 5 (b) is a cross-sectional view along the line B-B in Fig.
6 is a view showing the shape of the fixed contact according to the first embodiment.
7 is a view showing the shape of the stationary contactor of the second embodiment.
8 is a cross-sectional view showing a conventional electromagnetic contactor having a fixed contact to a tap terminal.
Fig. 9 is a view showing a fixed contact in which the tab terminal and the fixed contact are formed of separate members.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a best mode for carrying out the electromagnetic contactor according to the present invention (hereinafter referred to as an embodiment) will be described in detail with reference to the drawings.

As shown in Figs. 1 and 2, the electromagnetic contactor of the present embodiment has a lower case 18a and an upper case 18b formed of a rigid resin material having insulation properties. The upper case 18b is an apparatus in which a plurality of fixed contacts 31 and a pair of coil terminals 32 are disposed. The electromagnet 28 is accommodated in the lower case 18a, And an upper case 18b is attached to the opening.

2, the electromagnet 28 includes a coil frame 28b made of synthetic resin and wound around the electromagnetic coil 28a and a coil frame 28b wound around the coil frame 28b. A fixed core 28c fixed to the side wall of the lower case 18a and a movable core 28c opposed to the fixed core 28c so as to be contactable with and separable from the fixed core 28c, And a pair of coil terminal blocks (not shown) formed integrally on one end side of the coil frame 28b on which the movable iron core 28d is disposed, Respectively, a pair of coil terminals 32 are mounted.

The upper case 18b is provided with a plurality of terminal chambers 20a to 20e on the side of the load on which the fixed contacts 31 are respectively mounted and a plurality of terminals on the power source side on which the fixed contacts 31 are respectively mounted The contacts 21 are housed in the housing space S formed between the terminal chambers 20a to 20e and the terminal chambers 21a to 21e An arc extinguishing cover 23a covering the contact portion 22 and a contact cover 23b covering the base portion of the fixed contact 31 are mounted on the upper case 18b.

2 and 3, the contact portion 22 includes a movable contact support 22a made of synthetic resin, a return spring 22b, a plurality of movable contacts 22c, and a plurality of contact springs 22d . The movable contact support body 22a is arranged so as to move in parallel to the moving direction of the movable iron core 28d of the electromagnet 28. The movable contact point support body 22a is provided with a drive lever 22a1 provided on one side of the moving direction, So as to be interlocked with each other.

The return spring 22b is disposed in the upper case 18b by acting as a spring biasing force toward one side of the movable contact support body 22a. The plurality of movable contacts 22c are respectively disposed within the movable contact supporter 22a by being supported by the contact springs 22d so as to be movable in the same direction as the movable contact supporter 22a. The plurality of contact springs 22d are arranged by applying spring biasing force to the respective movable contacts 22c in the direction opposite to the direction in which the return spring 22b exerts the spring biasing force.

As shown in Fig. 1, the terminal chambers 20a to 20e on the load side are formed by partitioning by a plurality of first partition walls 24a to 24e which are arranged in parallel and spaced apart from each other.

4, the terminal chamber 20a is formed by partitioning between the first partition walls 24a, 24b which are parallel to each other and the storage space S in which the contact portions 22 are arranged Is provided as a space different from the storage space (S) by the second partition wall (25).

The terminal chamber 20a is provided with a rising plate portion 19b rising from the bottom surface of the terminal chamber 20a and a rising portion 19b extending from the top portion of the rising plate portion 19b in the center in the height direction of the terminal chamber 20a in the lateral direction A seat plate portion 19c extending forward from the second partition 25 is formed.

The terminal chamber 20a is formed with a fixed contact insertion space 26 (see FIG. 4) and a first press fit space 27 (see FIG. 5 (a)) and a second press fit space 29 (Fig. 5 (b)).

4, the fixed contact insertion space 26 is a space surrounded by the first and second partition walls 24a and 24b and the second partition 25 along the rising plate portion 19b, 25 are communicated with the accommodating space S in which the contact portion 22 is disposed via the insertion slit 25a formed in the housing 25.

5 (a), the first press-fitting space 27 protrudes forward from the second partition 25 in parallel with the left plate 19c above the left plate 19c And is a space between the first projections 27a.

5 (b), the second press-fitting space 29 has a flat bottom surface 29a provided at the bottom of the terminal chamber 20a and a bottom surface 29b at the top of the bottom surface 29a. And extends in parallel to the insertion slit 29a and is a space between the second projections 29a protruding forward toward the above-described insertion slit 25a. A stepped portion 29c having a different height in the vertical direction is formed on the inner side of the second projecting portion 29a.

7, the stationary contactor 31 mounted on the terminal chamber 20a has a rectangular shape when viewed from above (in plan view) abutting on the upper portion of the left plate portion 19c of the terminal chamber 20a A tab terminal 31b which is bent at a substantially right angle from one side in the width direction on one side in the longitudinal direction of the abutting plate 31a, A folding plate 31c which is bent at a substantially right angle from the other side in the width direction on the other longitudinal direction of the plate 31a and opposite to the tab terminal 31b; A fixed contact 31d extending from the central portion in a direction away from the abutment plate 31a and a second contacted platen 31b protruding from one side in the width direction on the other side in the longitudinal direction of the abutment plate 31a 31e and a protruding plate 31c in a direction away from the abutment plate 31a at the tip end of the bent plate 31c W and installed in claim 2 comprising a blood press-plate (31f) and the engaging tooth (31g) formed at an end (端 部) of the fixed contact (31d) close to the front end side of the bending plate (31c).

The stationary contact 31 having the above configuration is inserted into the terminal chamber 20a from the side of the upper case 18b and the stationary contact 31d is inserted into the accommodating space S through the stationary contact insertion space 26, The first press-fit plate 31e is press-fitted into the first press-fit space 27 as shown in Fig. 5 (a), and as shown in Fig. 5 (b), the second press- 31f are pressed into the second press-fitting space 29 and mounted in the terminal chamber 20a. At this time, the engaging teeth 31g of the fixed contact 31 are engaged with the stepped portion 29c after being placed on the stepped portion 28c provided inside the second press-fitting space 29. [

The stationary contact 31d of the stationary contact 31 inserted in the stationary contact insertion space 26 is arranged to be contactable and separable in the moving direction of the plurality of movable contacts 22c of the contact portion 22. [

The terminal chambers 20b to 20e and the fixed contacts 31 on the other load side are also arranged in the same structure because they are formed in the same shape as the terminal chambers 20a and the fixed contacts 31 described above. The plurality of terminal chambers 21a to 21e on the power supply side are also formed in the same shape as the terminal chambers 20a and the fixed contacts 31 and are arranged in the same structure.

The casing of the present invention corresponds to the upper case 18b and the terminal of the present invention corresponds to the fixed contact 31. The partition of the present invention has the first partition walls 24a to 24e, The fixed contact of the present invention corresponds to the fixed contact 31d and the male terminal of the present invention corresponds to the tab terminal 31b and the first to-be-inserted portion of the present invention corresponds to the first to- The second press-fit portion of the present invention corresponds to the second press-fit plate 31f, and the press-fitting engagement portion of the present invention corresponds to the first press-fit space 27 and the second press-fit space 29 The stopping prevention portion of the present invention corresponds to the engagement tooth 31g of the stationary contact 31 and the stepped portion 29c provided inside the second press fitting space 29. [

Therefore, the fixed contact 31 of the present embodiment is a component in which the tab terminal 31b and the fixed contact 31d are integrally formed, and the labor for assembling the fixed contact 31 is eliminated, Can be improved.

The stationary contactor 31 of the present embodiment has the terminal chambers 20a to 20e and 21a to 21e extending from the side of the upper case 18b even when the tab terminals 31b and the fixed contacts 31d are integrally formed. 21e. Since the casing of which the lower side is opened and the outer diameter is enlarged like the conventional device is not used, the size of the device can be reduced.

When the connection and pull-out operation of the female terminal part to the tab terminal 31b is performed, the fixed contact 31 of the present embodiment acts on the tab terminal 31b with an external force in the direction of the arrow shown in Fig. 5 (a) However, the first to-be-pressed plates 31e and the second to-be-inserted plates 31f of the fixed contacts 31 of the present embodiment are arranged in a direction perpendicular to the aforementioned external force (from the side of the upper case 18b) Fitting space 27 and the second press-fitting space 29, the fixing strength of the stationary contact 31 can be sufficiently secured even if the connecting and pulling operation of the female terminal part is repeated.

As shown in Fig. 5 (b), when connecting / pulling out the female terminal parts, an external force acting on the tab terminals 31b may be applied. In this embodiment, the second to-be-inserted plate 31f is provided at the distal end of the bent plate 31c spaced from the tab terminal 31b and press-fitted and held in the second press-in space 29, A large reaction force moment acts from the second to-be-pushed-in plate 31f against the external force acting on the second to-be-clamped plate 31f.

Since the engaging teeth 31g of the fixed contact 31 are engaged with the step portion 29c after being placed on the step portion 29c provided inside the second press fitting space 29, It is possible to reliably prevent the first press-fit plate 31e and the second press-fit plate 31f from being pulled out with respect to the space 27 and the second press-fit space 29. [

Although the fixed contacts 31 provided with the tab terminals 31b are described in this embodiment, as shown in Fig. 7, by using the fixed contacts 31 provided with the printed board terminals 31h The same effect can be obtained.

[Industrial Availability]

As described above, the electromagnetic contactor according to the present invention achieves downsizing, improves the assembly efficiency by reducing the number of parts, and even if the pulling operation of the female terminal part is repeated, the fixed contact of the fixed contact It is useful to prevent degradation.

18a; The lower case
18b; The upper case
19b; Standing plate
19c; The seat plate portion
20a-20e; Terminal chamber
21a to 21e; Terminal chamber
22; Contact portion
22a1; Drive lever
22c; Movable contact
23a; Extinguishing cover
23b; Contact cover
24a to 24e; 1,
25; The second bank
25a; Insert slit
26; Fixed contact insertion space
27; The first press-
27a; projection part
28a; Electronic coil
28b; Coil frame
28c; Fixed iron core
28d; Movable iron core
29; The second press-
29a; Bottom surface
29b; projection part
29c; Stepped portion
28; Electromagnet
31; Fixed contacts
31a; Abutment plate
31b; Tap terminal
31c; Bending plate
31d; Fixed contact
31e; The first press-fitted plate
31f; The second press-
31g; Jamming teeth
31h; Terminals for printed circuit boards
S; Storage space
32; Coil terminal

Claims (3)

A movable contact support body is housed in a space between the power source side terminal and the load side terminal to face the back side, a plurality of terminal chambers are formed by dividing the movable contact point support body into a plurality of partition walls, An electromagnetic contactor having a casing in which a stationary contact having fixed contacts and male terminals connected to female (female) terminal parts is mounted,
The fixed contact, the male terminal and the to-be-engaged portion are integrally formed,
Wherein the terminal chamber is provided with a press-fit engaging portion for engaging the engaged portion by press-fitting,
Wherein the press-fit direction of the engaged portion with respect to the press-fitting engagement portion is directed to a direction different from a direction in which the female terminal component is pulled and connected to the male terminal. The method according to claim 1,
The engaged portion provided on the fixed contact includes a first to-be-inserted portion formed in the vicinity of the male terminal and a second to-be-inserted portion formed in the vicinity of the fixed contact,
Wherein the press fitting engagement portion provided in the terminal chamber includes a first press fit space in which the first press fit portion is press fit and a second press fit space in which the second press fit portion is press fit. 3. The method according to claim 1 or 2,
Wherein the push-fit engaging portion is provided with a pull-out preventing portion for preventing the fixed contact, to which the engaged portion is press-fitted, from falling out in the direction opposite to the push-in direction.

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