KR20180003296A - Switch for a power window having carbon contact points - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a switch used in a power window of an automobile, and more particularly to a switch used in a power window of an automobile, And a second contact having a first contact having a first contact having a first contact and a second contact having a second contact and a second contact, .

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a power window switch having a carbon contact,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a switch used in a power window of an automobile, and more particularly to a switch used in a power window of an automobile, And a second contact having a first contact having a first contact having a first contact and a second contact having a second contact and a second contact, .

Generally, the power window switch of the vehicle has four contact points in order to perform the manual up and down operation, which is the first stage operation of the window, and the automatic up and down operation, which is the second stage operation.

That is, it has two key contacts for distinguishing the upward or downward movement of the window, and two key contacts for distinguishing the automatic operation as the first stage operation of the window and the manual operation as the second stage operation.

However, the four-contact structure of such a power window switch has a limitation in that the degree of freedom in layout design of the circuit is reduced, and furthermore, the space margin of the power window control module is reduced to restrict the construction of a more compact and slim module .

On the other hand, as a key input circuit for such a switch, a technique of an analog / digital conversion key input circuit of Korean Patent Application No. 10-1993-16989 is known.

SUMMARY OF THE INVENTION The present invention has been made in order to overcome the above-described problems of the related art, and provides a power window switch structure capable of reducing the number of contacts of a power window switch, .

According to an aspect of the present invention, there is provided a power window switch having a carbon contact, comprising: a base contact; a first contact disposed at an upper portion of the base contact and protruding to a first contact length; And a second contact having a first contact having one terminal of the second contact and a second contact having one terminal of the second contact protruding downward between the contacts of the first contact and a second contact of the second contact.

In the power window switch, the base contact 30 has a predetermined length on a substrate 20 on which a switch circuit is mounted, and is formed on one side of the insulator 33 with the center insulator 33 as a center And may have a first base contact 31 and a second base contact 32 formed on the other side of the insulator 33.

In the power window switch, the first contact 40 is located at the upper portion of the base contact 30 and has a plate-like connection portion 43 and a connection portion 43, A first contact terminal 41 protruding in the length m and short-circuited to the first base contact 31 of the base contact 30 in the first step operation; And a second contact point (42) protruding from the first contact point (m) and short-circuited to the second base contact point (32) of the base contact point (30) A second contact terminal (32) protruded downward between the two contact points (41, 42) of the first contact point (40) and short-circuited to the first base contact point (31) of the base contact point 51 of the base contact 30 and the contact points 41, 42 of the first contact 40, It may have a second contact (50) having a second contact other terminal 52 is short-circuited at the point (32).

In the power window switch, one terminal 51 and the other terminal 52 of the second contact 50 are connected to the first terminal 40 of the first contact 40 and the first terminal 41 of the second terminal 50, (N) having a length shorter than the contact length (m).

In the power window switch, the first contact 40 and the second contact 50 may be integrally formed.

In the power window switch, the first contact 40 and the second contact 50 may be formed of a carbon material.

In the power window switch, the base contact 30 may be formed of a gold material.

The power window switch having the above-described carbon contact according to the present invention is characterized in that the power window switch having two contacts reduces the number of contact points of the power window switch, And the space margin of the control module of the power window is enlarged, so that a more compact and slim module can be designed.

In addition, it is a very advanced invention that can reduce the manufacturing cost by reducing the number of resistors used in the power window switch.

1 is a circuit diagram of a power window switch according to the present invention,
2 is a configuration diagram of a power window switch according to the present invention,
Fig. 3 is an operational state diagram of a power window switch according to the present invention, in which Fig. 3a shows an open state of the switch, Fig. 3b shows a first contact short-circuit state of the switch, Fig. 3c shows a second contact short-
Fig. 4 is a graph showing the operating region of the power window switch of the present invention. Fig.

Hereinafter, the construction and operation of the power window switch having the carbon contact of the present invention will be described with reference to the drawings.

It is to be noted, however, that the disclosed drawings are provided as examples for allowing a person skilled in the art to sufficiently convey the spirit of the present invention. Accordingly, the present invention is not limited to the following drawings, but may be embodied in other forms.

In addition, unless otherwise defined, the terms used in the description of the present invention have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. In the following description and the accompanying drawings, A detailed description of known functions and configurations that may be unnecessarily blurred is omitted.

FIG. 1 is a circuit diagram of a power window switch of the present invention, and FIG. 2 is a configuration diagram of a power window switch of the present invention.

1, a power window control circuit using a power window switch according to the present invention includes an electronic control unit (ECU), and a control circuit for controlling an input voltage, to which an applied voltage (Vcc) (R) input to an input port (P1) of the ECU (ECU), and a switch (10) for inputting switch signals for raising and lowering the power window and for automatic and manual operation.

Fig. 2 shows the configuration of the switch 10 of the present invention.

Referring to FIG. 2, the switch 10 of the present invention is formed with a predetermined length on a substrate 20 on which a switch circuit is mounted. The switch 10 is formed on one side of the insulator 33, And a base contact 30 having a base contact 31 and a second base contact 32 formed on the other side of the insulator 33.

A flat plate-shaped connection portion 43 located at the upper portion of the base contact 30 and having a predetermined thickness W and a length L and a connection portion 43 having a first contact length m A first contact terminal 41 which is short-circuited to the first base contact 31 of the base contact 30 in a first-stage operation and a second contact point 41 which extends downward from the other end of the connection portion 43, and a first contact 40 having a first contact terminal 42 protruding from the second base contact 32 of the base contact 30 during a first step operation.

The first contact 40 is formed to protrude downward between the two contact points 41 and 42 of the first contact point 40 of the connection part 43 of the first contact point 40, A second contact terminal 51 projecting at a second contact length n formed by the base contact 30 and being short-circuited to the first base contact 31 of the base contact 30 during the second step operation, (N) having a length shorter than the first contact length (m) downward from the second base contact point (44) of the base contact (30) And a second contact 50 having a short-circuited second terminal 52 on one side.

At this time, the base contact 30 is preferably made of a material having low resistance, and the present invention is made of gold (Au) material.

The first contact 40 and the second contact 50 are integrally formed of a carbon material.

The first-stage operation of the switch of the present invention is an operation in which the first contact 40 is short-circuited to the base contact 30, and the two-stage operation of the switch of the present invention is performed after the first- The first contact 50 is short-circuited to the base contact 30 in a state where the contact 40 is short-circuited to the base contact 30.

The switch according to the present invention configured as described above has an electrical resistance value along the distance X1 between one terminal 41 of the first contact of the first contact 40 and the other terminal 42 of the first contact, A voltage having a different value is input to the electronic control unit (ECU) in accordance with the difference in electric resistance value depending on the distance X2 between the terminal 51 on one side of the second contact of the contact 50 and the terminal 52 on the other side of the second contact The input of the rising or falling signal of the window and the input of the signal of the manual or automatic operation are performed, and the operation state of the switch of the present invention will be described below.

Fig. 3 is an operational state diagram of the power window switch according to the present invention. Fig. 3a is an open state of a switch, Fig. 3b is a first contact short-circuit state of the switch, and Fig. 3c is a second contact short-

First, in the open state of the switch of the present invention shown in FIG. 3A, since the switch of the present invention is in an open state not closed with the base contact 30, the switch 10 shown in FIG. The input voltage V1 applied to the electronic control unit (ECU) becomes unfavorable.

3B, when the user operates the switch of the present invention to place the switch 10 of the present invention in the first-stage operation state, the one terminal 41 of the first contact 40 and the other terminal The terminal 42 is short-circuited to one terminal 31 and the other terminal 32 of the base contact 30 respectively. In this state, the distance between one terminal 41 and the other terminal 42 of the first contact A first resistance value R1 according to the first resistance value X1 is generated.

If the voltage applied to the electronic control unit in the above-described one-step operation state in the switch circuit of the present invention shown in FIG. 1 is V1,

V1 = R1 * Vcc / R (resistance value of R) + R1

The first input voltage V1 is applied to the electronic control unit by the voltage distribution formula of the first voltage V1 and the window according to the first operation state.

In this state, when the user further operates the switch of the present invention to place the switch 10 of the present invention in the second-stage operation state, as shown in Fig. 3C in this state, The first terminal 51 and the second terminal 52 are short-circuited with the first terminal 31 and the second terminal 32 of the base contact 30, respectively. In this state, the first terminal 51 and the second terminal 52 A second resistance value R2 is generated in accordance with the distance X2.

The second resistance value R2 generated by the two terminals 51 and 52 of the second contact 50 according to the two-stage operation is applied to both the terminals 41 and 42 of the first contact 40 Is smaller than the first resistance value R1 generated by the first resistor R1.

This is because the electrical resistance value is generated in proportion to the length of the conductor, and the distance X2 between the both terminals 51 and 52 of the second contact is equal to the distance between the both terminals 41 and 42 of the first contact (X1), the electrical resistance value is reduced.

Therefore, when the voltage applied to the electronic control unit in the above-described two-stage operation in the switch circuit of the present invention shown in Fig. 1 is V2,

V2 = R2 * Vcc / R (resistance value of R) + R2

The second input voltage V2 is applied to the electronic control unit by the voltage distribution formula of the second input voltage V2 and the operation of the window according to the second-stage operation state is performed. Due to the decrease of the second resistance value R2, V2) is also decreased. This reduction of the second input voltage V2 is generally the same principle as the voltage is increased in proportion to the current and the resistance (i.e., V (voltage) = I (current) * R (resistance)).

4 is a graph showing an operating range of the power window switch according to the present invention, and shows graphs of voltages input to the electronic control unit (ECU) during the first stage operation and the second stage operation of the present invention.

According to the graph, the voltage input to the electronic control unit (ECU) fluctuates due to the resistance value of the switch itself, which is varied at the time of shorting the first contact (40) and shorting the second contact (50) The switch operation can be performed according to the operation region and the two-stage operation region.

For example, in the one-stage operation region of the switch of the present invention, when the upward or downward movement of the window is performed by manual operation and the two-stage operation region is the operation of the upward or downward movement of the window by automatic operation, The electronic control unit controls the manual upward or downward movement of the window when the first contact 40 is opened or short-circuited in the region of the first contact 40, and when the second contact 50 is opened in the second- The electronic control unit can control the operation of the window so that the automatic rising or falling of the window occurs at the time of the short circuit.

Accordingly, the power window switch of the present invention reduces the number of contact points of the power window switch, which has been conventionally constituted only by the conventional four-contact type, thereby increasing the degree of freedom in layout design on the circuit and enlarging the spatial margin of the power window control module So that a more compact and slim module can be designed.

In addition, the number of contacts and resistors used in the power window switch is reduced, thereby reducing manufacturing costs.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, Should be construed as falling within the scope of protection of the present invention.

Description of the Related Art [0002]
10; The switch
ECU; Electronic control unit R; resistance
20; Board
30; Base contact
40; The first contact
41; One terminal of the first contact
42; Terminal of the first contact
50; Second contact
51; One terminal of the second contact
52; The second terminal of the second contact

Claims (7)

A base contact 30;
A first contact (40) located on the base contact (30) and having a first contact one terminal (41) and a first contact second terminal (42) protruding at a first contact length (m);
A second contact 50 having a second contact one terminal 51 and a second contact second terminal 52 protruding downward between the two contact points 41 and 42 of the first contact point 40; And a power window switch.
2. The device of claim 1, wherein the base contact (30)
The first base contact 31 formed on one side of the insulator 33 around the center insulator 33 and the other side of the insulator 33 formed on the substrate 20 on which the switch circuit is mounted, And a second base contact (32) formed on the second base contact (32).
3. The apparatus of claim 2, wherein the first contact (40)
A connecting portion 43 having a flat shape and positioned at the upper portion of the base contact 30 and a first contact length m protruding downward from one end of the connecting portion 43 to allow the base contact 30 A first contact point 41 which is short-circuited to the first base contact point 31 of the connecting part 43 and a first contact point m which protrudes downward from the other end of the connecting part 43, (42) which is short-circuited to the second base contact (32) of the first contact (30)
The second contact (50)
A second contact terminal (32) protruded downward between the two contact points (41, 42) of the first contact point (40) and short-circuited to the first base contact point (31) of the base contact point The second base contact point 32 of the base contact point 30 is connected to the second base contact point 32 of the base contact point 30 so as to protrude downward between the two side contact points 41 and 42 of the first contact point 40, And a second contact (50) having a second contact terminal (52).
The connector according to claim 3, wherein one terminal (51) and the other terminal (52) of the second contact (50) are connected to one terminal (41) of the first contact (40) And a second contact length (n) made of a length shorter than the length (m).
The power window switch according to claim 3, wherein the first contact (40) and the second contact (50) are integrally formed.
The power window switch according to claim 3, wherein the first contact (40) and the second contact (50) are made of carbon material.
The power window switch according to claim 3, wherein the base contact (30) is made of a gold material.

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