KR200416755Y1 - Portable mp3 player having a single jack - Google Patents

Abstract

The present invention relates to a portable MP3 player, the portable MP3 player according to the present invention is connected to each pole of the plug hole and the plug inserted into the plug hole formed so that the earphone plug or USB cable plug is inserted into one side of the portable MP3 player A single earphone and a USB jack are provided, including the connection terminals, and the connection terminals of the earphone and the USB jack are a grounding terminal, a right sound output and a first USB data communication terminal, and a left sound output and a second jack. And a USB data communication terminal and a USB power input terminal, and an analog switch for connecting one of a sound output path and a USB communication path and shorting the other is installed inside the portable MP3 player. The earphone and USB jack by the conversion operation When the earphone plug is inserted, a sound output path is connected and the earphone and the plug when the USB cable is inserted into the USB jack combination is characterized in being configured so that USB communication path is connected.

MP3 player, earphone jack, USB jack, analog switch

Description

Portable MP3 Player with Single Jack {PORTABLE MP3 PLAYER HAVING A SINGLE JACK}

1 is a perspective view showing the appearance of a portable MP3 player according to the present invention.

Figure 2 is a schematic diagram showing a portable MP3 player and earphones and a USB cable connected thereto according to the present invention.

Figure 3 is a block diagram of the earphone and USB dual jack of the portable MP3 player according to the present invention.

Figure 4 is an internal configuration of a portable MP3 player according to the present invention.

5a and 5b is an operating state diagram of the internal analog switch of the portable MP3 player according to the present invention.

※ Explanation of symbols for main parts of drawing

100: Jack with earphone and USB cable 110: Grounding terminal

120: Left sound output and USB data communication terminal (L / D-)

130: Right sound output and USB data communication terminal (R / D +)

140: USB 5V power input terminal

500: analog switch

The present invention relates to a portable MP3 player, and more particularly, a portable MP3 player earphone and a USB that is configured as a single common jack without separately configuring the earphone jack for inserting the earphone plug and the USB jack for inserting the USB cable plug. It's about a jack.

In the field of digital audio technology, digital audio files compressed with MP3 by digitizing analog audio signals are frequently used. Means for listening to the MP3 files include MP3 player application software that can be used in portable terminals such as desktop PCs, laptops and PDAs, and MP3 dedicated audio player devices (hereinafter referred to as MP3 players).

Here, the MP3 player can be made compact and convenient to carry, and the memory capacity for storing the MP3 file is sufficiently secured to satisfy the user's needs.

In recent years, the portability of MP3 players has been emphasized, and efforts have been made to miniaturize MP3 players as much as possible, and as the MP3 players serve as an accessory, such as carrying a MP3 player around the neck, a stylish and distinctive external design is required. It is becoming an important factor to promote their purchasing desire.

In the conventional MP3 player, two jacks for input and output are provided to be exposed to two places on the outer surface of the MP3 player, one of which is an earphone jack for inserting an earphone plug, and the other is for data transmission such as music files This is a USB jack to insert a USB cable plug to charge the internal rechargeable battery.

However, in the conventional MP3 player, when the earphone jack is viewed from the outside, only a small circular hole of about 3.5 mm in diameter is visible, so that the earphone jack has little influence on the appearance of the MP3 player, but the area occupied by the USB jack is also small. It has a big and complicated shape, and when exposed as it is, it has a problem that it greatly hurts the appearance of the MP3 player, and even if it covers the hole of the USB jack with an openable cover, the appearance is not good, and the manufacturing cost is increased by adding parts and assembly process for the cover. There is a problem that is high.

In addition, in the conventional MP3 player, since each space is required to install two jacks, there is a problem in miniaturizing the MP3 player, and a lot of component values are required.

In addition, it is difficult to implement a USB jack spatially and externally in an MP3 player having an externally smooth curved surface, such as the MP3 player shown in FIG. 1. In other words, the USB jack provides a free and original design of the MP3 player. The fact that there is something in the way is causing the problem of multilateral impressions.

The present invention has been made to solve the problems of the prior art, the present invention is a single common jack without configuring the earphone jack for inserting the earphone plug in the MP3 player and the USB jack for inserting the USB cable plug separately The purpose is to provide an MP3 player with advantages in terms of design and economics.

Portable MP3 player according to the present invention for achieving the above object is connected to each pole of the plug hole and the plug is inserted into the plug hole and the earphone plug or USB cable plug is inserted into one side of the portable MP3 player A single earphone and a USB jack are provided, including the connection terminals, and the connection terminals of the earphone and USB jack are ground terminals, a right sound output and a first USB data communication terminal, and a left sound output and a second USB. And a data communication terminal and a terminal for USB power input. An analog switch for connecting one of a sound output path and a USB communication path and shorting the other is installed inside the portable MP3 player. By operation to the earphone and the USB jack When the phone plug is inserted, it is structured such that the sound output path is connected and the USB cable, the USB plug is inserted into the communication path is connected to the earphone jack and USB combination.

In addition, the earphone and the USB jack is preferably a four-pole jack.

In addition, the plug hole of the earphone and the USB jack jack is configured to correspond to the cylindrical earphone plug, and one plug of the USB cable dedicated to the portable MP3 player is configured to correspond to the plug hole of the earphone and USB jack jack. It is desirable to have a single jack.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The MP3 player shown in FIG. 1 is an MP3 player having a heart-shaped outer case 10 having a size small enough to be invisible when placed in the middle of a palm, and has a circular plug in a valley formed on the upper portion of the heart shape. Earphone having a hole and a USB jack jack 100 is provided, the side is formed with a keypad 11 having a curved surface, the front of the heart-shaped display unit 12 is provided.

As shown in FIG. 2, the earphone plug 21 may be inserted into the earphone and the USB jack 100, or the USB cable plug 31 may be inserted. The earphone and USB jack 100 is the same size and shape of the jack for a conventional three-pole earphone plug, so that any earphone having a three-pole plug can be inserted into the earphone and the USB jack 100.

To transfer data such as music files or to charge the rechargeable battery inside the MP3 player, remove the earphone plug 21 from the earphone and USB jack 100 and plug one side 31 of the USB cable 30 connected to the PC 40. Insert When selling the MP3 player according to the present invention, the dedicated USB cable 30, which is provided as an accessory device, is different from the general USB cable 30 so that one plug 31 is cylindrical like a conventional earphone plug 21, so that the earphone And it can be inserted into the USB dual jack (100).

As shown in Figure 3, the configuration of the earphone and USB jack jack 100 is composed of a plug hole and four connection terminals which are provided inside the plug hole and connected to the inserted plug, the four connection terminals They are ground terminal (GND) 110, left sound output and USB data communication terminal (L / D-) 120, right sound output and USB data communication terminal (R / D +) 130, and USB 5V power input, respectively. Terminal 140.

The ground terminal (GND) is commonly used for earphones and USB cables, and connection terminals for sound output (LEFT / RIGHT) and USB data communication (USB_D + / USB_D-) are implemented in common, and the terminal for USB 5V power input is It is intended to receive power from a PC or the like used only when a USB cable plug is inserted.

In the present embodiment, the earphone and USB jack can be configured as a four-pole jack having four connection terminals, or a jack having more connection terminals as necessary.

4 is a block diagram showing a part of a circuit configuration of the MP3 player according to the present invention.

The digital signal processing apparatus (DSP) 200 performs post-processing such as audio encoding, EQ and bass processing, file management and user interface control, and the audio codec 300 decodes audio data. Output to the amplifier 400 responsible for the sound, the amplifier 400 is responsible for amplifying the audio signal and outputs to the earphone and USB jack jack 100.

Between the earphone and USB jack 100 and the digital signal processing device 200 and between the earphone and USB jack 100 and the audio codec 300 there is an analog switch 500 which is surrounded by a dotted line, the analog switch ( According to the conversion of 500), only one path of the sound output path and the USB communication path is formed. The type of analog switch 500 is very diverse and can be selected as appropriate. Since various methods of implementing the analog switch 500 are well known to those skilled in the art, a detailed description thereof will be omitted.

5A and 5B illustrate the operation of the analog switch 500.

When the earphone plug is inserted into the earphone and the USB jack, the analog switch 500 connects the amplifier with the sound / USB common terminal of the earphone and the USB jack to form a sound output path as shown in FIG. 5A. Zooming in will enable sound output through the earphones.

Meanwhile, when the USB cable plug is inserted into the earphone and the USB jack, the analog switch 500 detects the 5V current input from the USB power input terminal as shown in FIG. 5B and determines that the USB cable is connected. Accordingly, the sound output path is short-circuited and the sound / USB common terminal of the earphone and the USB jack and the digital signal processor are directly connected to form a data communication path, thereby enabling data communication via USB.

As described above, the present invention has been described only with respect to specific examples, but it is apparent to those skilled in the art that various modifications and changes can be made within the technical spirit of the present invention based on the specific examples above. Of course, it belongs to the utility model registration claim attached to the modification.

As described above, according to the portable MP3 player having a single jack according to the present invention, by using only one jack instead of separately configuring the earphone jack and the USB jack, the configuration is simplified, and the cost is reduced due to the reduction of parts. This invisible advantage is advantageous in designing a concise and individual product appearance, and it is a technology that can be particularly useful when it is difficult to implement a USB jack spatially and externally.

Claims (3)

In a portable MP3 player, A single earphone and a USB jack are provided on one side of the portable MP3 player, including a plug hole formed to insert an earphone plug or a USB cable plug and connection terminals connected to respective poles of the plug inserted into the plug hole. , The connection terminals of the earphone and the USB combined jack are configured to include a grounding terminal, a right sound output and a first USB data communication terminal, a left sound output and a second USB data communication terminal, and a terminal for a USB power input. In the portable MP3 player, an analog switch for connecting one of the sound output path and the USB communication path and shorting the other is installed, and the earphone plug is inserted into the earphone and the USB jack by the conversion operation of the analog switch. A portable MP3 player having a single jack configured to connect a USB communication path when a sound output path is connected and a USB cable plug is inserted into the earphone and USB jack. The method of claim 1, Portable earphone and USB jack is a portable MP3 player having a single jack, characterized in that the four-pole jack. The method according to claim 1 or 2, The plug hole of the earphone and the USB jack is configured to correspond to the cylindrical earphone plug, and one plug of the USB cable dedicated to the portable MP3 player is configured to correspond to the plug hole of the earphone and USB jack. Portable mp3 player with.

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