CN108540120A - A kind of button and Multiconductor press key circuit - Google Patents

Abstract

The invention discloses a kind of button, described by three I/O mouthfuls of key connection, described three I/O mouthfuls include a delivery outlet and two input ports, and the button includes multiple contact regions, and the multiple contact region is separately connected described three I/O mouthfuls.The invention also discloses a kind of Multiconductor press key circuits, including processing chip and multiple such as above-mentioned buttons, and the processing chip is with described by key connection.The present invention relates to technical field of key, a kind of button and Multiconductor press key circuit, including multiple contact regions, compared with traditional each button is only spent there are two key, not the case where reduction does not sweep key or sweeps wrong key, and one is pressed three I/O mouthfuls of key connection, improves chip utilization rate, cost is reduced, the restricted device of circuit board space is suitable for.

Description

A key and multi-contact key circuit

technical field

The invention relates to the technical field of keys, in particular to a key and a multi-contact key circuit.

Background technique

The number of commonly used remote control keys is generally 45 keys, and each key is equipped with two key buttons. Using the two I/O ports of the SOP8 chip to scan a key, it is easy to scan the wrong key or scan the wrong key, and at most it can only scan If there are 20 buttons, it is necessary to increase the number of I/O ports, and to change the chip package, it is necessary to increase the area of the chip. If it is changed to a SOP16 chip, the cost of use will be increased, and it is limited by the circuit board space of the remote control.

Contents of the invention

In order to solve the above-mentioned technical problems, the object of the present invention is to provide a button, which improves the utilization rate of the chip, has low cost, and reduces the situation of not scanning the key or scanning the wrong key.

In order to solve the above-mentioned technical problems, the object of the present invention is to provide a multi-contact button circuit, which improves the chip utilization rate, reduces the cost, and reduces the situation of not scanning the key or scanning the wrong key.

The technical solution adopted in the present invention is: a button, the button is connected to three I/O ports, the three I/O ports include an output port and two input ports, and the button includes a plurality of contacts area, the multiple contact areas are respectively connected to the three I/O ports.

As a further improvement of the above solution, the button includes three contact areas, the three contact areas are distributed in a circle, and the three contact areas are respectively connected to three I/O ports.

As a further improvement of the above solution, the button includes six contact areas, the six contact areas are distributed in a circle, and the six contact areas are divided into three contact groups, and the contact groups include mutually diagonal In the two contact areas provided, the three contact groups are respectively connected to three I/O ports.

As a further improvement of the above scheme, the button includes six contact areas, and the six contact areas are divided into three contact groups, wherein one contact group includes two contact areas arranged diagonally to each other, so The two contact areas arranged diagonally to each other are electrically connected, and the three contact groups are respectively connected to three I/O ports.

As a further improvement of the above solution, the contact area is fan-shaped.

A multi-contact button circuit includes a processing chip and a plurality of buttons as described above, and the processing chip is connected to the buttons.

As a further improvement of the above solution, the number of the keys is 30.

The beneficial effects of the present invention are:

A key, including multiple contact areas, compared with the traditional two keys for each key, it reduces the situation of not scanning the key or scanning the wrong key, and one key is connected to three I/O ports to improve chip utilization , reduce cost, and are suitable for devices with limited board space.

Another beneficial effect of the present invention is:

A multi-contact button circuit, the processing chip is connected to the button with multiple contact areas, compared with the traditional button with only two buttons, it reduces the situation of not scanning the button or scanning the wrong button, and one button is connected Three I/O ports improve chip utilization and reduce costs, and are suitable for devices with limited board space.

Description of drawings

The specific embodiment of the present invention will be further described below in conjunction with accompanying drawing:

Fig. 1 is a structural schematic diagram of a button embodiment 1 of the present invention;

Fig. 2 is a structural schematic diagram of the second embodiment of a button of the present invention;

Fig. 3 is a structural schematic diagram of a button embodiment 3 of the present invention;

Fig. 4 is a schematic diagram of a multi-contact button circuit according to the present invention.

Detailed ways

It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

The invention discloses a key, which is connected to three I/O ports to achieve the purpose of simultaneously scanning the three I/O ports. The three I/O ports include one output port and two input ports. Specifically, the button includes multiple contact areas, and the multiple contact areas are respectively connected to the three I/O ports.

The button of the present invention will be further described below in combination with specific embodiments.

Fig. 1 is a structural schematic diagram of a button embodiment 1 of the present invention. Referring to Fig. 1, in this embodiment, the button includes three contact areas, which are respectively the first contact area 1, the second contact area 2 and the third contact area. In the point area 3, the three contact areas are distributed in a circle. Preferably, in this embodiment, the contact area is in a fan-shaped structure, and the three contact areas are respectively electrically connected to three I/O ports, and the three I/O The port includes one output port and two input ports to achieve the purpose of scanning the I/O port at the same time.

Fig. 2 is a structural schematic diagram of a second embodiment of a button according to the present invention. Referring to Fig. 2, a button includes six contact areas, namely the first contact area 1a, the second contact area 1b, and the third contact area 2a, the fourth contact area 2b, the fifth contact area 3a and the sixth contact area 3b, the six contact areas are distributed in a circle, preferably, in this embodiment, the contact areas are fan-shaped, and the six The contact area is divided into three contact groups. The contact group includes two contact areas arranged diagonally to each other. The first contact area 1a and the second contact area 1b serve as the first contact group, and the second contact area 2a and the second contact area 2b are used as the second contact group, the third contact area 3a and the third contact area 3b are used as the third contact group, and the three contact groups are respectively connected to three I/O ports, Three I/O ports include one output port and two input ports to achieve the purpose of scanning I/O ports at the same time.

Specifically, in this embodiment, one key uses six carbon oil contacts (ie, contact areas), the trace width of the carbon oil key is 0.4MM, and the minimum diameter of the key carbon particles (not shown in the figure) is 2MM. Acting on the middle of the button, when the button is pressed, it can cover all carbon oil contacts.

Fig. 3 is a structural schematic diagram of the third embodiment of a button according to the present invention. Referring to Fig. 3, a button includes six contact areas, which are respectively the first contact area 1a, the second contact area 1b, and the third contact area 2a, the fourth contact area 2b, the fifth contact area 3a and the sixth contact area 3b, the six contact areas are distributed in a circle, preferably, in this embodiment, the contact areas are fan-shaped, and the six The contact areas are divided into three contact groups, and the contact groups include two contact areas arranged diagonally to each other, wherein the two contact areas in one contact group are electrically connected. In this embodiment, the first contact area 1a and the second contact area 1b serve as the first contact group, the second contact area 2a and the second contact area 2b serve as the second contact group, and the third contact area 3a and the third contact area 3b are used as the third contact group, wherein the first contact area 1a and the second contact area 1b are electrically connected, and the three contact groups are respectively connected to three I/O ports. Each I/O port includes an output port and two input ports to achieve the purpose of scanning the I/O port at the same time.

The keys with six contact areas are adopted, and the two contact areas of a contact group are arranged diagonally, so that when the user presses the key, even if the key is slightly tilted, it can also be realized to press and hold three different contact areas. , the trigger button is normal, reducing the situation of not scanning the key or scanning the wrong key. In addition, one button corresponds to three I/O ports, improving chip utilization.

FIG. 4 is a schematic diagram of a multi-contact button circuit according to the present invention. Referring to FIG. 4 , a multi-contact button circuit includes a processing chip and a plurality of the above-mentioned buttons, and the processing chip is electrically connected to the buttons.

Specifically, in this embodiment, the processing chip is an HB8101PK chip, and the processing chip includes a power supply terminal VDD, a ground terminal VSS, a first I/O port PA0, a second I/O port PA1, a third I/O port PA2, The fourth I/O port PA3 and the fifth I/O port PC0, the buttons include the first button S1, the second button S2 ... the thirtieth button S30, the power supply terminal VDD is connected in series with the first diode D1, the first diode The cathode of the tube D1 is used as an infrared output port, and the ground terminal VSS is connected to the power supply ground by connecting the filter capacitor C1.

In this embodiment, the power supply terminal VDD and the ground terminal VSS of the processing chip are used as high and low level output terminals, and one end of the first key S1 to the tenth key S10 is connected to the ground terminal VSS, and the other end is respectively connected to the first I/O port. PA0, the second I/O port PA1, the third I/O port PA2, the fourth I/O port PA3 and the fifth I/O port PC0 are connected to any two I/O ports; the eleventh button S11 to One end of the twentieth button S20 is connected to the power supply terminal VDD, and the other end is respectively connected to the first I/O port PA0, the second I/O port PA1, the third I/O port PA2, the fourth I/O port PA3 and Any two I/O ports of the fifth I/O port PC0 are connected; one end of the twenty-first button S21 to the twenty-sixth button S26 is connected with the first I/O port PA0, and the other end is connected with the second I/O port respectively. Any two I/O ports in the /O port PA1, the third I/O port PA2, the fourth I/O port PA3, and the fifth I/O port PC0 are connected; the twenty-seventh key S27 and the twenty-ninth key One end of the button S29 is connected to the second I/O port PA1, and the other end is respectively connected to any two I/O ports of the third I/O port PA2, the fourth I/O port PA3, and the fifth I/O port PC0. One end of the thirtieth key S30 is connected to the third I/O port PA2, and the other end is respectively connected to the fourth I/O port PA3 and the fifth I/O port PC0, that is, each key is connected to an output port is connected to two input ports.

A multi-contact button circuit, the processing chip is connected to the button with multiple contact areas, compared with the traditional button with only two buttons, it reduces the situation of not scanning the button or scanning the wrong button, and one button is connected Three I/O ports improve chip utilization and reduce costs, and are suitable for devices with limited board space.

The above is a specific description of the preferred implementation of the present invention, but the invention is not limited to the described embodiments, and those skilled in the art can also make various equivalent deformations or replacements without violating the spirit of the present invention. These equivalent modifications or replacements are all within the scope defined by the claims of the present application.

Claims (7)

1. a kind of button, which is characterized in that it is described by three I/O mouthful of key connection, described three I/O mouthful including delivery outlet with Two input ports, the button include multiple contact regions, and the multiple contact region is separately connected described three I/O mouthfuls.

2. a kind of button according to claim 1, which is characterized in that the button include three contact regions, described three A contact region is circumferentially distributed, and three contact regions are connected respectively three I/O mouthfuls.

3. a kind of button according to claim 1, which is characterized in that the button include six contact regions, described six A contact region is circumferentially distributed, and six contact regions is divided into three contact sets, the contact sets include mutually diagonal setting Two contact regions, three contact sets are connected respectively three I/O mouthfuls.

4. a kind of button according to claim 1, which is characterized in that the button includes six contact regions, by six Contact region is divided into three contact sets, and one of contact sets include two two contact regions being mutually diagonally arranged, described Two contact regions being mutually diagonally arranged are electrically connected, and three contact sets are connected respectively three I/O mouthfuls.

5. according to a kind of button of claim 2 to 4 any one of them, which is characterized in that the contact region is in sector structure.

6. a kind of Multiconductor press key circuit, which is characterized in that it includes processing chip and multiple any one of such as claims 1 to 5 The button, the processing chip is with described by key connection.

7. a kind of Multiconductor press key circuit according to claim 6, which is characterized in that the number of the button is 30.