EA021279B1 - Connection base of control circuit board of washing machine - Google Patents

Abstract

A connection base (104) of a control circuit board (100) of a washing machine is provided, in which the control circuit board (100) includes a group of conductive contacts (102), and the connection base (104) includes a connection base body (200) mounted on the control circuit board (100) and covering the conductive contacts (102); wherein a sealing element (300) in provided which is disposed between the connection base body (200) and the control circuit board (100), and which separates the conductive contacts (102) from an outside space of the connection base body (200) hermetically, so that the conductive contacts (102) are sealed in the connection base body (200), and water drops or water vapor are inhibited from enter therein, thereby avoiding the short circuit caused by the action of the water.

Description

The invention relates to a junction block of a control circuit board of a washing machine, wherein the control board contains a group of conductive contacts, and the junction block is installed on the control board and closes the conductive contacts. In particular, the invention relates to a waterproof design of the connection block of a control board of a washing machine with regard to conductive contacts.

The level of technology

The connecting block of the control board of the above type is described in patent application 1P 06-61643 A. Accordingly, the control board for a household electronic water-carrying appliance, in particular a washing machine, is completely covered with synthetic resin in order to form a waterproofing. The current-carrying contacts of the control board, not coated with synthetic resin, are connected with a connecting block covering the contacts.

In the prior art, a washing machine is usually equipped with an electronic control board. Various electrical components of the washing machine are connected to the control board by means of appropriate wires and connectors, in particular crimp connectors. Essentially, the general connection procedure is as follows: a connecting block is formed on the tip of the control board containing end contacts, a positive contact is made on a conductor connected to the electrical element by means of a corresponding conductor, inserted into the connecting block and is connected to the end contact of the control board. Thus, an electrical connection is realized.

The disadvantages of this method of connection are as follows: to ensure the operation of the contact elements after turning on the power, an electric voltage must be applied to the terminal contact, and there is inevitably a technological gap between the connecting block closing the terminal contact and the control board. The washing machine usually operates in a humid environment, and water may penetrate or condense at the end contact, with the result that a short circuit of the end contact and the consequent disruption of the proper functioning of the control board can result.

DISCLOSURE OF INVENTION

The objective of the invention is to develop a method of sealing and sealing the connecting pads control boards of the washing machine in relation to the conductive connection.

According to the invention, the problem is solved by a connecting block of the control board of the washing machine, wherein the control board contains a group of conductive contacts, and the connecting block includes a housing mounted on the control board and closing the conductive contacts; in addition, there is a sealing element located between the housing of the connecting block and the control board and hermetically separating the conductive contacts from the external environment surrounding the housing of the connecting block.

The above technical solution has the following advantages: the sealing element interacts with the housing of the connecting block and the control board in such a way that the conductive contacts are sealed in the housing of the connecting shoe, and drops or water vapor cannot penetrate inside; this prevents short circuits caused by water.

According to a preferred embodiment of the invention, the conductive contacts are located on the edge of the control board, and the housing of the connecting block contains a connecting groove, which includes the edge of the control board, and part of the control board on which the conductive contacts are located is inserted into the connecting groove, and on each side of the connecting groove there is a protrusion, and the sealing element is located around at least one protrusion of the connecting groove. Thus, the sealing element fills the gap formed during the installation of the connection between the control board and the housing of the connecting block, which ensures high-quality waterproofing. In addition, the production technology is implemented very easily, and the costs increase only to a limited extent or not at all.

Preferably the mounting groove of the sealing element is located on the protrusion. The mounting groove is used for convenient fastening and positioning of the sealing element.

Preferably, the sealing element is an elastic sealing ring, in addition, at least one locking element is located on the projection, which prevents the sealing ring from sliding off the projection. Such an improved solution is used to facilitate the mounting of the sealing ring, in addition, it eliminates the sliding of the installed sealing ring, i.e. increases reliability.

Preferably, the locking element is a protruding stop. The protruding stopper can be easily machined.

Under the washing machine described by the invention, refers to a generic device for processing linen. This may be a laundry washing device, a laundry drying device and a device combining the functions of washing and drying laundry. Various embodiments of the invention described

- 1 021279 below and shown in the attached drawings, are intended solely to illustrate the invention and are not restrictive. In the protected scope of the invention includes any modifications of the invention made by a specialist in the framework of the invention.

Brief Description of the Drawings

Preferred embodiments of the invention are described in detail below on the basis of the accompanying drawings, which depict:

FIG. 1 is a wiring diagram of a control board of a washing machine and a connecting block; FIG. 2 is a schematic structural view of a connector block separated from a control board of a washing machine;

FIG. 3 is a structural view of the housing of the connecting block.

The implementation of the invention

As shown in FIG. 1 and 2, a group of conductive contacts 102, for example end contacts 102, is located on the edge of the control board 100 of the washing machine. The connecting block 104 is mounted on the control board 100 and closes the conductive contacts 102. The connecting block 104 includes a housing 200 of the connecting block. The connecting groove 202 into which the edge of the control board 100 is inserted is located on the housing 200 of the connecting shoe, and the protrusion 204 is located on each side of the connecting groove 202. After installing the housing 200 of the connecting shoe on the management board 100, the portion of the control board 100 on which the conductive contacts are located 102 enters the coupling groove 202, as shown in FIG. 2

As shown in FIG. 1 and 3, the mounting groove 206 is located on a protrusion 204 corresponding to the conductive contacts 102 on the housing of the junction box 200, and the elastic sealing ring 300 is mounted on the protrusion 204 and is included in the mounting groove 206. Once installed, a portion of the elastic sealing ring 300 is located between the junctional housing 200 pads and control board 100 and seals the gap between them. In addition, the elastic sealing ring 300 is located outside the conductive contacts 102 and hermetically separates the conductive contacts 102 from the external environment surrounding the housing 200 of the junction block. Thus, the conductive contacts 102 are enclosed in a connecting groove 202, in which they are protected from the ingress of water, which causes short circuits.

In addition, on the ledge 204 of the casing 200 of the connecting block there is a protruding stopper 208, which is designed to fix the elastic sealing ring 300 and prevent it from sliding off the ledge 204 of the casing 200 of the connecting block.

In the following special embodiment, the elastic sealing ring 300 is installed only on one side of the mounting groove 202, since in this embodiment the conductive contacts 102 are located only on one side of the control board 100. In another special embodiment, in which the conductive contacts are located on both sides of the control board, elastic sealing rings can be attached to both lugs of the mounting groove.

Claims (5)

CLAIM 1. The connecting block (104) of the control board (100) of the washing machine, the control board (100) containing a group of conductive contacts (102), and the connecting block (104) containing a housing (200) mounted on the control board (100) and closing conductive contacts (102), characterized in that it is equipped with a sealing element (300) located between the connecting block body (200) and the control board (100) and hermetically separating the conductive contacts (102) from the external environment surrounding the connecting housing (200) pads. 2. A connection block according to claim 1, characterized in that the conductive contacts (102) are located on the edge of the control board (100), and the connection block body (200) has a connection groove (202), which includes the edge of the control board (100) moreover, the part of the control board (100), on which the conductive contacts (102) are located, is inserted into the connecting groove (202), on each side of the connecting groove (202) there is at least one protrusion (204), and a sealing element (300) located around this ledge (204). 3. The connection block according to claim 2, characterized in that the mounting groove (206) of the sealing element is located on the protrusion (204). 4. The connecting block according to claim 2, characterized in that the sealing element (300) is an elastic ring, and at least one locking element (208) is located on the protrusion (204), preventing the sealing ring from sliding off the protrusion. 5. The connection block according to claim 4, characterized in that the locking element (208) is a protruding stopper.