The subject of the invention is an electric connector device, primarily for the hermetically sealed compressor of refrigerators, which is assigned to the cover of the compressor and includes an electric connector socket and connector plug, and an external cable is connected to the connector plug through the connector socket on the outside of the cover, and the connector plug is connected to an internal power cable through a connector socket on the inside of the cover, and the connector socket includes at least two contact components, and the longitudinal section of the contact component is approximately U-shaped.

The state of the art includes the following solutions:

European patent description No. EP0447607 A2 describes an electric connection to engine located in a hermetically sealed compressor.

European publication document No. EP1419554 A2 also describes an electric connector to the engine of a hermetically sealed compressor.

The solution described in UK patent documents Nos. GB1367101 A and GB1469724 A may serve as the external electric connecting unit of hermetically sealed compressors and engines used in refrigerators.

The solution described in US patent description No. US5615071 A describes a protector for engines used in hermetically sealed compressors, which is located in the compressor.

US publication document No. US5942967 A describes a device managing the power supply for a compressor.

International patent document No. WO2009121153 Al describes an invention that allows an electric cable to be connected to the hermetically sealed compressors of refrigerators.

Chinese utility model No. CN201191681 Y presents a connector component for the compressor of refrigerators and air conditioners. The invention has a simple structure, may be implemented at low cost, and closes independently and in a stable manner.

Chinese utility model No. CN203574140 U describes a U-shaped connector unit. According to the extract, the design of traditional U-shaped connectors is no advantageous, because they hardly cover the wire, and the solution aims to improve this situation. The device is a Ushaped contact surface, the connecting springs and holding tubes are located on the Ushaped surface.

Japanese publication document No. JP2002190336 A describes a flexible connector. The unit has a bending part that can follow the wire and provides adequate connection.

International publication document No. WO2014136809 Al describes a flexible connector. The flexibility allows more stable and better connection, and increases the size of the connecting surface.

According to another known solution, the connector providing electric connection has the shape of an open barrel roll, the inside of which is covering the pin of the connector plug ideally. The connecting pressure is provided by the flexibility of the barrel roll. The size of the connecting surface and the connecting pressure depends heavily on to what extent the connecting socket meets the ideal cylinder surface. In addition to the relaxed shape of the connector, this also depends on the connection between the connector and the plastic case, the placement of the connector in the casing etc. A disadvantage of this setup is that production inaccuracies may result in significant deviations (connecting surface, connecting pressure, i.e. temporary resistance pressure). This is particularly true for connector plugs used with small compressors, where the distance between the pins is 4.41 mm.

In another construction, the pin of the connector plug connects to the internal surface of the two legs deformed by the socket through the slit on the U-shaped part of the connecting socket (theoretically along the edge).

None of the solutions is an advantageously tripolar electric connector that is capable of providing a stable electric connection where the connection is implemented on a surface with adequate dimensions, instead of an edge, and that may be used with small dimensions in an excellent manner.

The purpose of the invention is to eliminate the shortfalls of known solutions and to implement a tool that provides a stable electric connection and contact without connection problems between the external electric power cable and the compressor engine, even at a small scale, and that establishes the connection on a relatively larger surface than the known solutions.

The inventive step is based on the recognition that it is advantageous to implement the contact components so that the diameter of the opening on the bottom component of the part with a Ushaped longitudinal section is smaller than the diameter of the connecting component, so that, during connecting the connecting component, the lower part of the contact component is stretched apart, which stretching is allowed by a slit. Furthermore, the inventive step is based on the recognition that the size of the contact surface may be increased by implementing an edge on the opening and by making the side components of the contact component flexible. These recognitions allow the electric connector to exert high connection pressure with the novel contact components, thereby creating a stable electric connection without connection problems and on a relatively large surface.

According to the purpose set, the most general implementation form of the solution according to the invention may be implemented according to claim 1. The various implementation forms are described in the sub-claims. In general, the solution is an electric connector device, primarily for the hermetically sealed compressor of refrigerators, which is assigned to the cover of the compressor and includes an electric connector socket and connector plug, and an external cable is connected to the connector plug through the connector socket on the outside of the cover, and the connector plug is connected to an internal power cable through a connector socket on the inside of the cover, and the connector socket includes at least two contact components, and the longitudinal section of the contact component is approximately U-shaped.

A distinctive feature of the invention is that the contact component is fitted with a bottom component and side components, and the bottom component is fitted with an opening that is suitable for receiving the connecting component and, when inactive, the diameter of which is smaller than the diameter of the connecting component, and the opening is fitted with an edge that is suitable for establishing surface connection on the connecting component, and a slit is located on the bottom component, the side components, and the edge that allows them to be stretched apart.

In another implementation form, the diameter of the connecting component is larger than the smallest distance between the side components, as measured in an inactive state, and the side components are fitted with a top part that provides flexibility and is leaning outward relative to the bottom component. In another implementation form, the contact components are placed into a casing that fixes their relative distance from each other.

In another implementation form, the overall shape of the perpendicular projection of the side components on the bottom is a rectangle.

In another implementation form, one side component is taller than the other side component.

It may be another distinctive feature that the contact components are connected to internal power cable through connecting parts.

It may be yet another feature that the casing is made of plastic and the cover is made of steel.

In yet another implementation form, the connector plug as connecting components on both sides.

The invention is presented in more detail below based on implementation examples and drawings.

On the attached drawings,

Figure 1 shows a spatial image of the connector plug and the connector socket,

Figure 2 shows a spatial image of the connected connector plug and the connector socket Figure 3 shows the operation of the contact component on a spatial image,

Figure 4 shows the operation of the contact component on a spatial image again, Figure 5 shows the longitudinal section of the compressor,

Figure 6 shows a spatial image of the connector socket before inserting the contact components,

Figure 7 shows a cross-section of the casing with the internal power cables placed therein,

Figure 8 shows a spatial image of the connector socket after inserting the contact components,

Figure 9 shows an enlarged segment of the A-A section of the casing,

Figure 10 shows the A-A section of the casing,

Figure 11 shows an enlarged segment of the C-C section of the casing,

Figure 12 shows, the C-C section of the casing, and

Figure 13 shows a section of the casing. Figure 1 shows the electricity conducting connector plug 4 and the connector socket 5 before connection. Connecting components 13 are located in the connector plug 4 and they will connect to and establish tight electric connection with the contact components 7 located in the casing 8.

Figure 2 shows the next step, when the connecting components 13 are held tightly by the contact components 7 located in the casing 8, i.e. when the connector plug 4 and the connector socket 5 are already connected.

Figure 3 shows the operation of the contact component 7. The contact component 7 is implemented in the connecting part 12 so that it can be mounted onto the internal power cable 6 by pressing and it also fixes the insulation thereof. The contact component 7 is quite small, the size of the bottom component 11 thereof is approximately 2-3x2-3 mm. The contact component 7 is responsible for establishing a stable electric connection. Side components 12 and 16, the bottom component 11 - these form a U-shape -, the top parts 12a and 16a of the side components 12 and 16, the connecting part 12b, the slit 14 enabling stretching and forming a continuous and stretchable opening with the opening 15, as well as the edge 10 located on the bottom component 11 form part of the contact component 7. The edge 10 provides more stable connection and increases the connection surface. The opening 15 - having a circle shaped cross-section - leads and facilitates the insertion of the connecting component 13. The diameter d2 of this opening 15 is smaller than the diameter dl of the inserted connecting component 13, so the opening 15 will be stretched somewhat and the edge 10 will fit tightly onto the connecting component 13. The side components 12 and 16 - which are in fact the legs of the U-shaped body of the flexible contact component 7 - also increase the size of the connection surface and held onto the connecting component 13 after connection tightly. The reason for this is that the L distance of the side components 12 and 16 is smaller than the diameter dl of the connecting component 13. The top parts 12a and 16a lean outward mildly. The connecting component 13 fits into the opening 15 tightly, and the connecting pressure is strong on the entire surface of the edge 10 and the lower parts of the side components 12 and 16.

Figure 4 also shows the contact component 7 more closely. The connecting component 13 is connected to the contact component 7. The contact component 7 is connected to the internal power cable 6 through the connecting part 12b. The contact component 7 is implemented so that it allows the internal power cable 6 to be connected by pressing and the fixing of the insulation for the internal power cable 6. The figure also shows as the specially designed and flexible contact component 7 is connected to the connecting component 13 using the stretching slit 14 located on the bottom component 11 and the side components 12 and 16. The slit 14 opens slightly because the diameter dl of the connecting component 13 is large enough the force it open. The diameter dl is also larger than the L distance between the side components 12 and 16, meaning that the side components 12 and 16 are also held tightly onto the connecting component 13 after connection due to the mild deformation. This increases the size of the connecting surface and the stability of the electric connection even further.

Figures 3 and 4 shows the shape changes of the slit 14 that ensure adequate connecting pressure.

Figure 5 shows as the standing part of the engine 2 and the coils 3 are located inside the cover 1 of the compressor. If the compressor is hermetically sealed, the engine 2 is located inside the cover 1. The engine 2 is a condenser motor with a shorted rotating part, and its standing part includes the coil 3 of the main and auxiliary phase. The coils 3 of the engine 2 are supplied with power from the outside of the cover 1 by the external cable 9 and the heat-proofed internal power cable 6 located on the inside of the cover 1, through the conducting connector plug 4 built into the cover 1 in a hermetically sealed manner and through the connector socket 5. This kind of hermetically sealed compressor - the engine 2 of which is powered through the stable connection between the connector plug 4 and the connector socket 5 according to this invention - is primarily used in refrigerators and freezers.

Figure 6 shows the parts of the connector socket as the internal power cable 6s are connected to the contact components 7 through the connecting part 12b. The figure also shows the casing 8, advantageously made of plastic, that includes the contact components 7. Side components 12 and 16 and the bottom component 11, which form a U-shape, are parts of the contact component 7, as well as the connecting part 12b and the stretchable slit 14, which forms a continuous and stretchable slit with the opining 15, and the edge 10 located on the bottom component 11.

Figure 7 shows the internal power cables 6 connected to the contact components 7 inside the casing 8.

Figure 8 is similar to Figure 6, but it shows a subsequent step, when the contact components 7 are already placed inside the casing 8, which is normally made of plastic. The contact components 7 are connected to the internal power cables 6.

Figure 9 shows an enlarged segment of the A-A section when the connecting component

13 is connected. The top parts 12a and 16a are holding the connecting component 13 tightly, because the connecting component 13 is stretching the part due to the size of its diameter dl . The top part 12a is connected to the connecting part 12b.

Figure 10 shows the A-A section of the casing 8, with the connecting component 13 placed into the contact component 7. The connecting part 12b of the contact component

7 is connected to the internal power cable 6 by pressing, and also fixes its sealing, and the internal power cable 6 will reach the engine later. The connecting part 12b is in contact with the top part 12a of the contact component 7.

Figure 11 shows an enlarged segment of the cross-section of the connecting component 13 stuck in the edge 10 of the contact component 7. The edge 10 on the bottom component 11 provides a more stable connection and increased connecting surface. The figure shows an enlarged segment of the C-C section. The edging radius of the edge 10 is designed to facilitate the insertion of the connecting component 13.

Figure 12 shows the C-C section of the casing 8. The drawing also shows the connecting component 13 stuck into the contact component 7.

Figure 13 shows a section of the casing 8 and the location of the A-A and C-C sections. The presented device has numerous advantages. One advantage of the solution is that it provides a stable electric connection between the connecting devices, even if some dimension related errors occur during production accidentally. The flexible contact component is capable of adjusting to small differences regarding the diameter of the connecting component. One advantage of the opening with the edge is that it makes connecting easier, since the edge is leaning inward slightly and helps leading the connecting component. Another advantage of the edge is that the connection is established on a relatively large surface instead of the single-line connection used so far. Another advantage of the invention is that it works with small connectors without problem. The contact surface is increased even further and a more stable connection is provided by the fact that the side components of the contact component also hold tightly onto the connecting component. The connection between the contact component and the connecting component is very strong and hard to move. The use of the flexible contact component is simple, but very reliable, and with limited movement. Another advantage is that the contact components and the power cables are fixed in the casing of the connector socket safely, thereby preventing the movement and vibration of the contact components relative of each other, the wearing of the contact components and the internal power cables, as well as the connection problems that may result.

In addition to the above examples, the invention may be implemented in other forms and with other manufacturing procedures within the scope of protection.