CN200993767Y - Improved Structure of Multimedia Keyboard - Google Patents

Abstract

The utility model relates to a multimedia keyboard improved structure, which comprises a keyboard body, a control circuit, a voice input device and a plurality of voice output devices, wherein the keyboard body comprises a shell, a base which is oppositely connected with the shell, and a plurality of voice chambers which are defined by the shell and the base together; the control circuit is arranged on the keyboard body and comprises a plurality of high-pass filters, a plurality of low-pass filters and a plurality of power amplifiers; the sound input device is arranged on the keyboard body, is electrically connected with the control circuit and is used for receiving sound; the sound output device is arranged in the sound chamber of the keyboard body and is electrically connected with the control circuit; rely on control circuit drive sound output device to the resonance of cooperation sound room makes the utility model has the advantages of promote space utilization, integrate the circuit, improve loudspeaker tone quality and efficiency.

Description

Improved Structure of Multimedia Keyboard

technical field

The utility model relates to a keyboard, in particular to a multimedia keyboard structure.

Background technique

At present, the keyboard integration has quite a variety of functions; among them, the speaker for sound output is installed in the keyboard, so that the keyboard not only has the function of input, but also has the function of sound output. In this way, the trouble of the space occupied by the speakers can be reduced, and the wires can also be reduced. Therefore, it is quite convenient to use, and it also makes the allocation of space more free.

However, the current keyboards equipped with speakers on the market cannot increase the output power of the speakers due to the power limit of the output interface (PS/2 and USB), and of course cannot produce a pure and noise-free effect in terms of sound performance. Consumers stay away from it; thus, consumers would rather connect another set of speakers and supply power to the speakers, and are unwilling to endure keyboard speakers with low power and poor sound quality. In this way, the built-in speakers of the keyboard cannot play their original Function, but also reduce the built-in speaker of the keyboard to a decorative item.

Therefore, how to improve the sound output of the aforementioned keyboard and develop a keyboard with multiple additional functions is the technical difficulty that the utility model designer of this case wants to solve.

Feeling the crux of the problem in the above-mentioned case, the designer of the utility model of this case used his academic knowledge to study with great concentration, and finally innovated a kind of multimedia keyboard for industrial use.

Contents of the invention

Aiming at the deficiencies of the prior art, the purpose of the utility model is to provide an improved structure of a multimedia keyboard, so that the effect of sound output is better.

For realizing above-mentioned object, the technical scheme that the utility model adopts is:

An improved structure of a multimedia keyboard, characterized in that: it is powered by a computer output interface, including a keyboard body, a control circuit, a sound input device and a number of sound output devices, wherein: the keyboard body includes a shell , a base relatively connected to the housing, a sound chamber defined by the housing and the base, and at least one input terminal; the control circuit is arranged on the keyboard body and coupled to the aforementioned input terminals, including several A high-pass filter, a digital low-pass filter and a digital power amplifier, the high-pass filter and the low-pass filter are each electrically connected to a power amplifier; the sound input device is arranged on the keyboard body, and is electrically connected to the control circuit, and used to receive sound; and the sound output device is arranged in the sound chamber of the keyboard body, is electrically connected to the control circuit, and includes at least one tweeter and at least one woofer, and the tweeter and woofer is electrically connected to the output end of the power amplifier mentioned above.

A shock-absorbing film is provided on the inner surface pad of the housing.

The sound input device is a microphone.

The input terminal has an interface joint, a sound input joint and a sound output joint.

The interface connector is a PS/2 connector.

The interface connector is a USB connector.

The interface connectors are PS/2 connectors and USB connectors.

Compared with the prior art, the utility model adopting the above-mentioned technical solution has the advantages of improving space utilization, integrating circuits, and improving speaker sound quality and efficiency.

Description of drawings

Shown in Fig. 1 is the appearance perspective view of preferred embodiment of the present utility model;

Shown in Fig. 2 is the structural exploded perspective view of preferred embodiment of the present utility model;

Shown in Fig. 3 is to represent in Fig. 1 the sectional view along A-A line;

Shown in Fig. 4 is the block diagram of preferred embodiment of the present utility model.

Explanation of reference signs: 1-keyboard body; 11-housing; 111-key; 112-shock-absorbing film; 12-base; 13-independent chamber; 14-sound chamber; 141-reflection conduit; 15-input terminal; 151-interface connector; 152-sound input connector; 153-sound output connector; 2-control circuit; 21-high-pass filter; 22-low-pass filter; 23-power amplifier; 24-filter circuit; 3-sound input device; 4-sound output device; 41-tweeter; 42-woofer; 91-computer audio output interface; 92-computer output interface.

Detailed ways

With regard to the technology, means and effects achieved by the utility model, preferred embodiments are given and detailed descriptions are as follows in cooperation with the drawings:

Please refer to Fig. 1 to Fig. 4, the improved structure of the multimedia keyboard of the present invention is powered by the computer output interface 92, and includes a keyboard body 1, a control circuit 2, a sound input device 3 and a digital sound output device 4, of which:

The keyboard body 1 includes a housing 11, a base 12 relatively connected to the housing 11, an independent chamber 13 and a sound chamber 14 defined by the housing 11 and the base 12, and at least one input terminal 15 One side of the casing 11 is provided with a plurality of buttons 111, and the inner side of the buttons 111 is provided with a shock-absorbing film 112 to reduce vibration; Conduit 141, and several sound cups 142 extending inwardly from the base 12, the sound cup 142 is set on the outer ring side of the reflective conduit 141, and the sound cup 142 and the reflective conduit 141 have a certain distance; The input terminal 15 has an interface connector 151, a sound input connector 152, and a sound output connector 153;

The control circuit 2 is arranged in the independent chamber 13 of the keyboard body 1, and is coupled to the aforementioned input terminal 15, and includes a digital high-pass filter 21, a digital low-pass filter 22, a digital power amplifier 23 and a filter circuit. 24; wherein, the aforementioned input terminal 15 is coupled to the high-pass filter 21, the low-pass filter 22 and the filter circuit 24, and outputs power to the filter circuit 24, and the filter circuit 24 is electrically connected and supplies power to the high-pass filter Device 21, low-pass filter 22 and power amplifier 23, described high-pass filter 21 and low-pass filter 22 are each electrically connected to a power amplifier 23;

The sound input device 3 is arranged in the independent chamber 13 of the keyboard body 1, is electrically connected to the control circuit 2, and is used to receive sound, and the sound input device 3 can be a microphone; and

The sound output device 4 is arranged on the sound chamber 14 of the keyboard body 1, is electrically connected to the control circuit 2, and includes at least one tweeter 41 and at least one woofer 42, and the tweeter 41 and the woofer 42 is electrically connected to the output end of the power amplifier 23 mentioned above.

Please refer to Fig. 4 for the use state of the above-mentioned components. The improved structure of the multimedia keyboard of the present invention is connected with the computer output interface 92 by means of the interface joint 151 of the input terminal 15, and the described interface joint 151 can be a PS/2 or USB joint. , and the sound input connector 152 and the sound output connector 153 of the input terminal 15 are electrically connected to the computer sound effect input and output interface 91, and the computer sound effect output and output interface 91 is to receive the sound received by the sound input device 3, and the computer sound effect output The input interface 91 transmits audio signals to the high-pass filter 21 and low-pass filter 22 of the control circuit 2 to filter high and low frequency sound waves to improve the dynamic range of sound waves. The high and low frequency sound waves are amplified by a power amplifier 23 respectively. Afterwards, it is played through the tweeter 41 and the woofer 42, and by virtue of the resonance effect of the sound chamber 14, the effect of the sound output can be better.

It is also worth noting that the control circuit 2 can simultaneously process the signals of the left and right channels, and output the sound by means of the sound input device 3. Of course, it can also be set as multi-channel. As long as it is properly set, the same effect as above can be achieved. Use purpose and effect.

Claims (7)

1, a kind of MultiMedia Keyboard structure-improved is characterized in that: is by the computer output interface supply power, includes a keyboard body, a control circuit, an acoustic input dephonoprojectoscope and number voice output, wherein:

Described keyboard body includes a housing, and one connects the base of housing relatively, and the tone chamber that number is defined jointly by housing and base is with at least one input terminal;

Described control circuit is to be arranged at the keyboard body, and couples aforesaid input terminal, includes several Hi-pass filters, number low-pass filter and number power amplifier, and described Hi-pass filter is respectively to be electrically connected a power amplifier with low-pass filter;

Described acoustic input dephonoprojectoscope is to be arranged at the keyboard body, and is electrically connected control circuit, and in order to receive sound; And

Described voice output is the tone chamber that is arranged at the keyboard body, is to be electrically connected control circuit, includes at least one loudspeaker and at least one bass horn, and described loudspeaker is the output terminal that is electrically connected above-mentioned power amplifier with bass horn.

2, MultiMedia Keyboard structure-improved according to claim 1 is characterized in that: described housing medial surface pad is provided with a damping film.

3, MultiMedia Keyboard structure-improved according to claim 1 is characterized in that: described acoustic input dephonoprojectoscope is a microphone.

4, MultiMedia Keyboard structure-improved according to claim 1 is characterized in that: described input terminal is to have a port connections, a sound input adapter and a voice output joint.

5, MultiMedia Keyboard structure-improved according to claim 4 is characterized in that: described port connections is the PS/2 joint.

6, MultiMedia Keyboard structure-improved according to claim 4 is characterized in that: described port connections is the USB joint.

7, MultiMedia Keyboard structure-improved according to claim 4 is characterized in that: described port connections is PS/2 joint and USB joint.

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