CN1118080C - Electricl device of type comprising contactor including housing for installation of protective module, and protective module - Google Patents

Abstract

An electrical device comprising a contactor and a protection component, the contactor has a recess for accommodating a protection component, the contactor comprises a base, the recess is arranged in one wall of the contactor, the The shape of the protective assembly is made such that the assembly formed by the contactor and the protective assembly supported by the contactor will not exceed the volume formed upward from the above-mentioned foot, and the above-mentioned foot is reserved for close fastening The space required for the screws is characterized in that said recess spans the entire width of the wall of the base, while the protective assembly can be mounted or removed by clamping its sides.

Description

Electrical device with contactor and protective assembly having a recess for receiving the protective assembly

field of invention

The present invention relates to electrical devices and protection assemblies comprising a contactor shaped to accommodate an overvoltage protection assembly within its base.

Background technique

In the known technology, such overvoltage protection components are connected with the contactor to protect the coil of the contactor from external overvoltages that may arise between its terminals, or to protect electronic devices located near the contactor from the movement of the electromagnet. generated interference.

This protection component is generally installed on the contactor when needed after the contactor has been wired and put into use.

Installing protective components is often difficult due to the small space inside the electrical installation, the complex wiring system making access to the electrical installation difficult, or because the coil terminals are already occupied by two wires.

It is sometimes necessary to disassemble and rewire the electrical installations adjacent to the contactors, which is quite expensive in terms of labor.

In order to solve the above problems, European Patent No. 0198099 proposes to set a groove on one side of the contactor, insert the protection component into the groove completely, and make the exposed side of the protection component be on the plane of the side wall of the protector. This construction requires the use of tools to remove the protective assembly from its seat. The advantage of this solution is that the components are completely contained in the contactor volume formed upward from the contactor feet. However, after the contactor is installed, in order to install or remove the components, it must be installed in the adjacent contacts of the electrical device. Leave enough space between the devices.

This solution also has the disadvantage that it occupies a large part of the space available in the area of the contactor.

Not only that, but since the shape of the contactor has evolved and the electrical connections to the coils are now usually on the front side of the contactor, this solution is no longer feasible.

French patent document FR2631738 proposes an assembly consisting of two parallelepiped parts connected by a thin flat part. The two parallelepiped parts are located in cavities formed for this purpose on either side of the front of the contact, in the vicinity of the terminals of the contact, while the flat part rests on the front of said contact. Thus, the protective assembly located on the contactor protrudes from the front of the contactor. The advantage of this configuration is that it is not necessary to move adjacent contactors when installing or removing the module. The main disadvantage of this construction is the fact that, when the assembly is mounted on the contactor, its two parallelepiped parts are mounted in channels that act as fastening screws approaching said contactor, so when it is necessary to move the contactor , the protective assembly must be removed.

Contents of the invention

Therefore, the object of the present invention is to provide a device comprising a contactor and a protective assembly, which is designed so that it is always easy to install or remove the protective assembly, and the presence of this assembly does not hinder the work to be done on the contactor. operate.

In summary, the present invention provides an electrical device comprising a contactor and a protective assembly, the contactor has a recess for mounting a protective assembly, the contactor includes a base, and various electrical components constituting the contactor are installed On the connector, the contactor has feet at the four corners behind it for mounting fastening screws, the space above the feet is freed for tightening the fastening screws, and the recess is arranged in On one wall of the contactor, the shape of the protective assembly is such that the assembly formed by the contactor and the protective assembly supported by the contactor will not exceed the volume formed upward from the above-mentioned feet, and leave Above the foot is the space required for access to the fastening screw, characterized in that the recess spans the entire width of the wall of the base, and the protective assembly can be mounted or removed by clamping its sides.

The electrical device according to the invention also has the following features:

- The upward facing side of the concave part of the installation protection component is defined by the central protrusion between the electrical contacts of the coil;

- there is a wall between the feet of the wall of the base, forming a recess for the installation of protective components;

--The concave part of the above-mentioned installation protection component is formed above the contactor;

--The above-mentioned protection assembly comprises a box, and this box has two vertical arms that are respectively arranged above the two sides of the box, and these two arms support a device for establishing electrical contact between the protection assembly and the contactor coil installation;

- the sides of the box of the above-mentioned protection assembly are located between the above-mentioned feet and rise up to the vertical arm in such a way that a space is left above the said feet for access to the said fastening screws;

--The electrical connectors of the above-mentioned coils are prongs extending into the slots located on both sides of the above-mentioned protrusions;

--Each arm of the above-mentioned protection component has a blade-shaped contact terminal connected to the electrical components in the box, and the blade-shaped contact terminal is located against the pin of the contactor, so that the protection component and the contactor An electrical connection is established between the coils;

- a device for grasping the upper part of the protective assembly box, which consists of a cutout in the protrusion and a flexible tongue on said upper side;

- A device for gripping the underside of the box of the protective assembly, consisting of two openings formed in the above-mentioned wall and two prongs formed in said underside.

By describing the embodiments below with reference to the accompanying drawings, the present invention will be easier to understand, but the embodiments are not intended to limit the present invention, in the accompanying drawings:

Description of drawings

Fig. 1 is a perspective view of a contactor according to the present invention and an unmounted protection assembly;

Fig. 2 is a perspective view of the base of the contactor on which the protection component is installed;

Fig. 3 is a perspective view of the protection assembly.

Detailed ways

As is well known, as shown in Figure 1, the contactor comprises a base 10 in which various electrical components constituting the contactor are installed, these components being a coil and an electromagnet and an upper part with contacts .

The contactor can be inserted into an electrical assembly by means of the base, either by being positioned on the guide rail through the opening 11, or by passing through the holes 12 provided on the feet 13 provided at the four corners of the rear of the base 10. screws to fix. For this purpose, a space is left above the foot 13 so that the fastening screw can be accessed with a tool.

The area 14 where the electrical connection can be established is located in front of two lateral arms 15 which respectively sit on either side of a central protrusion 17 on the upper side of the base 10 .

Regarding the expression methods of the positions or angles of various components in this specification, it should be understood in this way, that is, relative to the contactor in its working position hanging on the vertical support.

Each arm 15 of the protrusion 17 is separated by two slots 16 .

The protrusions 17 extend forward with respect to the upper wall 18 of the base, but remain within the volume enclosed upwards from the base 13 if the feet 13 are considered to support the four corners of the base.

The individual feet 13 are connected by a thin wall 19 .

The upper face of the protrusion 17 is on the same level as the free edge of the thin wall 19, which level is also arranged along the support base.

The electrical connections formed by pins 20 , which are connected to the electrical connections 14 of the coil, protrude into the slots 16 . These pins can be seen in Figure 1, which has been partially cut away to more clearly see the pins on the right side of the figure.

These pins are located at a distance from the opening of the slot 16, towards the front and upwards, so as to avoid the danger of inadvertent contact with the electrical assembly during its operation.

Said protrusion 17 comprises a cutout 21 at an angle to the wall 19 .

The wall 19 has two openings 22 located near the front wall 18 . For ease of moulding, these openings 22 in the embodiment shown in the figures are through openings.

The shape of the contactor described above is such that a free space remains within the volume of the contactor, said free space being located between the protrusion 17 and the wall 19 . This free space forms a recess for mounting the protection assembly 3 over the entire width of the wall of the base, in this embodiment over the top.

The protective assembly 3 used to be installed on the contactor includes a box 30, the width of the box 30 is equal to the lateral free space of the contactor between the feet 13, the height is slightly lower than the space separating the protrusion 17 and the wall 19, and the thickness The distance between the front wall 18 of the fixed contactor and the front surface of the protrusion 17 is equal.

The top of the box 30 is formed by two vertical arms 31 on either side thereof.

In this way, the box 30 can be placed between the protrusion 17 and the wall 19 without exceeding the volume formed upwards from the foot. The sides 37 of the box 30 are located between the feet 13 of the contactor and extend upwards to the vertical arm 31, so that the box does not occupy the free space left above said feet, in order to ensure on the one hand the access to the fastening screws, On the other hand, the sides of the protective assembly can be clipped.

The arm 31 is to be placed in the slot 16 .

Each arm 31 has a blade-shaped contact terminal 32 connected to an electrical component located in the box 30, and the blade-shaped contact terminal 32 is used to contact the pin 20 so as to form an electrical connection between the protection assembly 3 and the coil of the contactor. connect.

The means for hooking the protection assembly 3 onto the contactor are provided between the upper face 35 of the assembly and the projection 17, and between the lower face 36 and the wall 19, respectively.

A flexible tongue 33 for cooperating with the cutout 21 in the protrusion 17 is provided on the upper face 35 of the case 30, between the two arms 31. When pushing in the direction of arrow A in the figure (Fig. 1), the tongue can be pushed aside. On the underside 36 of the box 30 there are two prongs 34 for cooperating with the openings 22 in the wall 19 .

To mount the protection assembly on the contactor, the arm 31 is inserted into the slot 16 and the tongue 33 is snapped into the cutout 21 .

When the assembly is pulled upwards to tilt it, the tongue 33 is pushed out of the way so that the side 36 of the box rests above the wall 19 .

The assembly is then pressed down until the assembly rests against the wall 19 while the prong 34 is inserted into the opening 22 .

In this way, the protection assembly is pressed against the side wall 18 of the contactor while clamping its side wall 37 at the same time.

It is easy to understand that a small volume above the recess for the protective assembly is sufficient for mounting and dismounting said assembly.

Of course, other embodiments are possible without departing from the scope of the present invention.

These other embodiments could be, for example, modifying the size of the free space reserved for mounting the protection component as a functional element to be used in the circuit.

For this purpose, the wall 19 can be at a different level than that in the figure and the protrusion 17 can be thinner or thicker.

The protective assembly can be manufactured in a simple and economical way, the box 30 and the joint 31 being made of a hollow plastic part obtained by moulding. Inside the hollow is arranged the electrical circuits that make up the protective assembly, with contact tongues 32, embedded in a hard resin that protects the components, ensuring their resistance to shocks and vibrations.

Then, the front face of the hollow member is sealed with resin.

The aforementioned front rests against the contactor and is not visible from the outside, thus eliminating any special finishing procedures.

Claims (10)

1. An electrical device comprising a contactor and a protection component (3), the contactor having a recess for accommodating a protection component, the contactor comprising a base (10), various components of the contactor The electrical components are installed on the connector, and the contactor has feet (13) on the four corners behind it, which are used to install fastening screws, and the space above the feet (13) is vacated to facilitate Tighten the fastening screw, the recess is provided in one wall of the contactor, the shape of the protection assembly (3) is such that it makes the assembly formed by the contactor and the protection assembly supported by the contactor not Exceeding the volume formed upwards from the above-mentioned feet (13) and leaving the space above said feet required for access to the fastening screws, characterized in that said recess spans the entire width of the wall of the base (10) , and the protection assembly (3) includes a box (30), the side (37) of which is located between the feet (13) of the contactor, so that the protection assembly can be installed or removed by clamping its side (37). 2. The electrical device according to claim 1, characterized in that, the upward facing side of the recess containing the protective assembly is defined by a central protrusion (17) located between the electrical contacts (20) of the coil. 3. The electrical device according to claim 1 or 2, characterized in that, there is a wall (19) between the feet (13) of the wall of the above-mentioned base (10), forming a recess for accommodating the protection assembly . 4. The electrical device according to claim 1 or 2, wherein the recess for accommodating the protection component is formed above the contactor. 5. The electrical device according to claim 1 or 2, characterized in that, the box (30) of the above-mentioned protection assembly supports two vertical arms (31) that are respectively arranged above the two sides of the box, and these two arms support There is a device for establishing electrical contact between the protective assembly and the contactor coil. 6. The electrical device according to claim 5, characterized in that, the side (37) of the box (30) of the above-mentioned protection assembly (3) is located between the above-mentioned feet (13), and rises up to the vertical arm, so as to keep Clear the space above the feet to ensure access to the fastening screws. 7. The electrical device according to claim 2, characterized in that the electrical connector (20) of the coil is a pin protruding into the slots (16) on both sides of the protrusion (17). 8. The electrical device according to claim 5, characterized in that, each arm (31) of the above-mentioned protection assembly has a sheet-shaped contact terminal (32) connected with the electrical element in the box (30), and the Blade contact terminals are positioned against the pins (20) of the contactor to establish an electrical connection between the protection assembly and the contactor coil. 9. The electrical device according to claim 2, characterized in that it also comprises a device for grasping the upper (35) of the protective assembly box (30), which consists of a cutout (21) in the protrusion (17) and a A flexible tongue (33) on said top consists. 10. The electrical device as claimed in claim 3, characterized in that it also comprises a device for grasping the lower part (36) of the protective assembly box (30), which consists of two formed on the above-mentioned wall (19). The opening (22) consists of two prongs (34) formed on said underside (36).

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