CN2655581Y - digital audio player - Google Patents

Abstract

A digital audio player. The utility model is provided for providing a sound device which can avoid accumulating dirt, has good durability and can simulate the traditional operation action and fun, and comprises a shell, a playing structure assembled in the shell and a control structure electrically connected with the playing structure; the playing structure is provided with a circuit unit and a record reading unit; the control structure is provided with a turntable unit, a driving unit and a signal reading unit; the rotary disc unit is provided with a first rotary disc, a second rotary disc which synchronously/asynchronously rotates with the first rotary disc and a combination piece; the driving unit comprises a driving unit rotating shaft, an electromagnetic fixed seat and an electromagnetic rotating seat; the signal reading unit is provided with a first shading sheet which is provided with a first supporting bracket and synchronously rotates with the first turntable, a first photoelectric interrupter which reads a first reading signal of the first shading sheet, a second shading sheet which is synchronously and fixedly rotated at the tail end of the rotating shaft and a second photoelectric interrupter which reads a second reading signal of the second shading sheet; the read first and read signals are transmitted to the circuit unit.

Description

digital audio player

technical field

The utility model belongs to audio devices, in particular to a digital audio player.

Background technique

Generally speaking, in order to create a lively atmosphere in some specific occasions, DJ personnel will push the vinyl records on the record player with their hands. These methods can control the rotation speed and rotation direction of the record, so that specific pieces of music can be played at different speeds or even repeated, and combined with the adjustment of the volume, high and low, and changes in high and low, it can produce an effect that attracts the masses and creates a lively atmosphere. atmosphere. The aforementioned functions do achieve good results for some predetermined occasions, but the process of using vinyl records by DJ personnel is easy to cause damage to the records themselves, and at the same time, it is often necessary to prepare a large number of vinyl records to meet the needs of the performance, not only the volume Huge and inconvenient to carry.

Moreover, the music media currently on the market are mainly CD records, which are not only smaller in size but also lighter in weight. Therefore, if CDs can be used as the source of music and can be used by DJ personnel to perform the same changes as the traditional effect, it must be possible to produce music in the future. Under the same effect, the burden on the DJ personnel is reduced. Therefore, a digital audio player is used by DJ personnel to compare the practice of vinyl records, so that the music played is varied.

As shown in FIG. 1 , a conventional digital audio player 1 includes a disc holder 11 for placing a CD disc, a laser head 12 for reading a CD, and is electrically connected with the laser head 12 for processing The circuit unit 13 that sends digital signals from the head 12, the control panel 14 that is electrically connected to the circuit unit 13 and used to set the playback control, the analog turntable 15 that is driven by the driving device 17 and continuously rotates, and detects the phase change of the analog turntable 15 and It is sent to the detector 16 of the circuit unit 13 .

The circuit unit 13 has components such as a high-frequency amplifier, a driver IC, a digital processor, a system microprocessor, a dynamic memory, a digital-to-analog converter, and a low-frequency filter that are electrically connected to each other. This type of circuit unit 13 has been widely used in the industry. use, so it will not be described in detail.

The known digital audio player 1 is mainly to place the CD on the record holder 11, read the data on the CD with the laser head 12 and store it in the dynamic memory of the circuit unit 13, and display the CD music data on the control panel. panel 14, and at this moment, the DJ personnel can input control parameters on the control panel 14 so as to control the rotating speed and steering of the analog turntable 15, and when the detector 16 detects the change of the analog turntable 15 at this time, it can The signal of the phase change is sent back to the system microprocessor of the circuit unit 13, and then the music data stored in the dynamic memory is read, and after the digital-to-analog converter of the circuit unit 13 converts this data into analog data, it can be obtained by A low frequency filter blows the music out.

The analog turntable 15 of the conventional digital audio player 1 has two configurations in structure.

As shown in FIG. 2 , the simulation turntable 15 of the first form has a disk body 151 and a reflective sticker 152 attached around the surface of the disk body 151 . The reflective sticker 152 has several reflective areas 153 spaced apart from each other.

As shown in FIG. 3 , the second form simulation turntable 15' has a disc body 151', a cover plate 153' covering the surface of the disc body 151', and a reflective sticker 154' between the cover plate 153' and the disc body 151'. . The cover plate 153' has a number of reflective perforations 155' around the edge.

As shown in Fig. 1, Fig. 2 and Fig. 3, for the first type of analog turntable 15, the detector 16 sends a signal directly to the reflective sticker 152, and receives the reflected signal to determine the phase change. The second form simulates the turntable 15' so that the detector 16 emits detection light through the reflective perforation 155' on the cover plate 153', and the signal is reflected to the detector 16 by the reflective sticker 154', thereby to judge phase changes. The aforementioned two forms of analog turntables 15, 15' can be used by the detector 16 to detect and judge the phase change of the signal, but there are still some defects in its structure:

1. The analog turntable 15 of the first form is because the reflective sticker 152 is attached to the surface of the disc body 151 by sticking. After a period of use, the reflective sticker 152 is easy to fall off, resulting in unsatisfactory durability.

2. In the second form of the analog turntable 15', several reflective holes 155' are provided on the cover plate 153' for the detector 16 to detect the passage of light. However, this kind of structural design tends to cause dust to easily accumulate in each reflective perforation 155 ′. Once dust accumulates in each reflective perforation 155 ′, it will inevitably reduce the effect of the detector 16 on detecting the reflective sticker 154 ′, and also Hardly an ideal design.

As shown in Figure 4, there is another device in the industry that can also simulate the method of operating a traditional vinyl record, that is, the "audio reproduction device" in Japanese Patent Publication No. 2000-30372, which mainly has another form. The control mechanism 9 mainly utilizes the control mechanism 9 to cooperate with other circuit components to control output audio changes, and the configuration and arrangement of the relevant circuit components are generally well-known technologies, and will not be described further.

The control mechanism 9 generally has a rotating shaft 91, a knob 92 fixed on one end of the rotating shaft 91 and exposed on the panel 90, a signal rotating plate 93 fixed on the other end of the rotating shaft 91, a signal rotating plate 93 on one side and The signal rotary plate 93 emits a signal transmitter 94 for detecting signals and a signal receiver 95 assembled on the opposite side of the signal transmitter 94 .

A plurality of slots 931 are radially arranged on the signal rotating plate 93 , and the laser beam signal emitted by the signal transmitter 94 passes through the slots 931 and is received by the paired signal receivers 95 . When the DJ personnel change the music, they turn the knob 92 to change the signal passing through the groove 931, so that the signal receiver 95 can receive different signal forms through the change. In this way, the music reproducing device can play music at different speeds and directions according to different received signals.

Although this kind of audio reproduction device can avoid insensitivity and lack of accumulated dirt, when the DJ player plays music, the fun is not only in the change of the music itself, but also in the touch of the vinyl record itself by the DJ player. Touch and push the vinyl record to change its rotational speed and direction to change different melodies. However, the aforementioned audio reproduction device cannot meet the needs of DJ personnel in this respect, and it is hardly an ideal design.

Contents of the invention

The purpose of this utility model is to provide a digital audio player that avoids accumulation of dirt, has good durability, and can simulate traditional operation actions and enjoyment.

The utility model comprises a hollow casing forming an assembly space, a playback structure assembled in the casing, and a control structure electrically connected with the playback structure; the playback structure has a circuit unit and a record that is electrically connected with the circuit unit and can read the record The reading unit; the control structure has a turntable unit that can be relatively rotatably installed on the top side of the casing, a drive unit that is arranged in the casing assembly space and drives the turntable unit to rotate, and a signal reading unit that is arranged in the casing assembly space; The turntable unit has a first turntable that is relatively close to the housing, a second turntable that is arranged at intervals on the top side of the first turntable and rotates synchronously/asynchronously with the first turntable, and is arranged between the first and second turntables, and the two sides of the turntable are respectively movable. A coupling piece that is detachably combined with the first and second turntables; the drive unit has a rotating shaft that passes through the housing and rotates synchronously with the turntable unit, an electromagnetic fixing seat that is fixed around the rotating shaft, and is arranged on the outer side of the electromagnetic fixing seat for relative rotation. The electromagnetic rotating seat that drives the turntable unit to rotate; the signal reading unit has a first support bracket arranged at the bottom of the drive unit, a first light shield that rotates synchronously with the first turntable, and is fixed on the upper end of the first support bracket and reads The first photointerrupter for the first reading signal of the first light-shielding plate, the second light-shielding plate that is fixed at the end of the rotating shaft for synchronous rotation, and the second light-shielding plate that is set at the lower end of the first support bracket and reads the second reading of the second light-shielding plate The second photoelectric interrupter for taking signals; the first and second reading signals read are sent to the circuit unit.

in:

The drive unit has a support base arranged in the housing assembly space and fixedly connected to the housing, a center base located in the middle of the support base, a rotating sleeve sleeved outside the rotating shaft and rotating synchronously with the first turntable of the turntable unit, The heat dissipation copper sleeve arranged between the rotating sleeve and the center seat and the joint connecting the top of the rotating sleeve and the first turntable of the turntable unit; the rotating shaft is pivoted on the center seat and rotates synchronously with the second turntable of the turntable unit; The fixed seat surrounds the outer side of the rotating shaft and is fixedly connected with the central seat.

Because the utility model comprises a hollow shell, a play structure assembled in the shell, and a control structure electrically connected with the play structure; the play structure has a circuit unit and a record reading unit; the control structure has a turntable unit, a drive unit and a signal reading unit The take-up unit; the turntable unit has a first turntable, a second turntable that rotates synchronously/non-synchronously with the first turntable, and a bonding piece arranged between the first and second turntables; the drive unit has a rotating shaft that rotates synchronously with the turntable unit, an electromagnetic The fixed seat and the electromagnetic rotating seat; the signal reading unit has a first support bracket, a first shading sheet that rotates synchronously with the first turntable, a first photointerrupter that reads the first reading signal of the first shading sheet, Synchronously rotate the second light-shielding plate fixed at the end of the rotating shaft and the second photointerrupter for reading the second reading signal of the second light-shielding plate; the read first and second reading signals are sent to the circuit unit. When the electromagnetic rotating seat drives the first and second turntables of the turntable unit and the combination sheet to rotate synchronously, the second turntable will rotate the first and second shading sheets at the same speed with the rotation axis; and when the DJ personnel block the second turntable to continue to rotate At this time, the first turntable and the first light-shielding sheet will continue to rotate at a predetermined speed. At the same time, after the second turntable is subjected to an external force to change the rotation speed or turn indefinitely, the second light-shielding sheet that is linked with the second turntable will also be synchronized. The rotation speed and steering direction are changed, so that the second photointerrupter can read the second reading signal with different phases, and transmit the second reading signal to the circuit unit of the playback structure; when the DJ personnel use it too hard When the first turntable also decelerates, the first photointerrupter will read the first reading signal from the first light-shielding plate after the first turntable has decelerated, and the first reading signal will be sent to the circuit unit to increase The amount of current is so that the second turntable is no longer affected by external force, and immediately rotates with the first turntable and the combination piece at the same speed; that is, when the utility model is in normal operation, the first and second turntables of the turntable unit and the combination piece are It will be rotated synchronously driven by the electromagnetic rotating seat of the drive unit. At this time, the digital audio player will play the form of a traditional vinyl record; when the first and second turntables of the turntable unit rotate synchronously, the playback structure will emit normal sound effects ; and when the second turntable is subjected to external force, such as when the DJ personnel change its speed or direction by hand, since the first and second turntables are not synchronously rotating, the second photoelectric interrupter will read the second reading with different phase data. Take the signal and send it to the circuit unit, so that the playback structure produces a special sound effect; the utility model uses the first and second shading sheets and the first and second photoelectric interrupters for reading the first and second shading sheets Installed in the assembly space of the casing, it can indeed prevent dust and dirt from adhering; the control structure provides DJ personnel with traditional operating methods to change music. When the digital audio player plays music and the turntable unit is not affected by external force , the second turntable of the turntable unit will start to rotate, which is just like the rotation state when playing a traditional vinyl record. Then, the DJ personnel can directly apply force on the second turntable to change the rotation speed and direction of the second light-shielding sheet. , the second photointerrupter will read the second light-shielding film to obtain the second reading signal with different phases, and then play the changed music; indeed, it has better durability and can be fully simulated by DJ personnel The state of the traditional operation of the vinyl record; not only avoiding the accumulation of dirt, good durability, but also simulating the traditional operation action and fun, so as to achieve the purpose of the utility model.

Description of drawings

Fig. 1 is a structural schematic diagram of a conventional digital audio player.

Fig. 2 is a schematic perspective view of the disassembled structure of the turntable of the first form of the conventional digital audio player.

Fig. 3 is a schematic perspective view of the disassembled structure of the turntable in the second form of the conventional digital audio player.

FIG. 4 is a perspective view showing the structure of a conventional audio reproduction device.

Fig. 5 is a schematic perspective view of the structure of the utility model.

Fig. 6 is a schematic sectional view of the structure of the utility model.

Fig. 7 is a schematic perspective view of the disassembled structure of the turntable unit of the present invention.

Fig. 8 is a perspective view showing the exploded structure of the driving unit and the reading unit of the present invention.

Detailed ways

As shown in FIGS. 5 and 6 , the digital audio player 2 of the present invention includes a hollow casing 3 , a playback structure 4 assembled in the casing 3 , and a control structure 5 electrically connected to the playback structure 4 .

As shown in FIG. 6 , the housing 3 is roughly a three-dimensional rectangular box, which has an assembly space 31 formed inside it.

The playback structure 4 is assembled in the assembly space 31 of the housing 3 , and has a circuit unit 41 and a disc reading unit 42 electrically connected to the circuit unit 41 and capable of reading discs.

The circuit unit 41 is in the form of a circuit board, which has components such as a high-frequency amplifier, a driver IC, a digital processor, a system microprocessor, a dynamic memory, a digital-to-analog converter, and a low-frequency filter that are electrically connected to each other. The combinations and collocations between the various electronic components are all known technologies, and are not the focus of this creation and will not be repeated here.

The control structure 5 has a turntable unit 6 that can be relatively rotatably installed on the top side of the casing 3, a drive unit 7 that is arranged in the assembly space 31 of the casing 3 and drives the turntable unit 6 to rotate, and a drive unit 7 that is arranged in the assembly space 31 of the casing 3. Signal reading unit 8 .

As shown in Figures 6 and 7, the turntable unit 6 has a first turntable 61 relatively close to the housing 3, a second turntable 62 arranged at intervals on the top side of the first turntable 61, and a second turntable 62 arranged between the first and second turntables 61, 62. The connecting piece 63 is detachably combined with the first and second turntables 61 and 62 in between and on both sides thereof.

The first and second turntables 61 , 62 and the coupling piece 63 of the turntable unit 6 are coaxial circular pieces and rotate synchronously.

The first turntable 61 is made of aluminum, and the second turntable 62 is made of plastic to simulate the touch of a vinyl record.

The bonding sheet 63 is made of non-woven fabric, and its upper and lower sides are in contact with the first and second turntables 61 and 62 respectively and have frictional force, so as to achieve the purpose of combining the first and second turntables 61 and 62 .

As shown in Fig. 6 and Fig. 8, the drive unit 7 has a support base 75 arranged in the assembly space 31 of the housing 3 and fixedly connected with the housing 3, a center base 76 arranged in the middle of the support base 75, and pivotally arranged in the center. Seat 76 and the rotating shaft 71 that rotates synchronously with the second turntable 62 of the turntable unit 6, the rotating sleeve 77 that is sleeved on the outside of the rotating shaft 71 and rotates synchronously with the first turntable 61 of the turntable unit 6, and is arranged on the rotating sleeve 77 and the center The heat dissipation copper sleeve 78 between the seats 76, the electromagnetic fixed seat 72 that surrounds the outer side of the rotating shaft 71 and is fixedly connected with the central seat 76, and the electromagnetic rotating seat 73 that is arranged on the outer side of the electromagnetic fixed seat 72 and can drive the turntable unit 6 to rotate relative to each other And a combination piece 74 for connecting the top end of the rotating sleeve 77 and the first turntable 61 of the turntable unit 6 . The heat dissipation copper sleeve 78 is used to dissipate the heat generated when the rotating shaft 71 rotates relative to the rotating sleeve 77 .

The electromagnetic fixing base 72 and the electromagnetic rotating base 73 are capable of rotating relative to the electromagnetic fixing base 72 through the electromagnetic interaction between the electromagnetic rotating base 73 and the electromagnetic rotating base 73 .

The circuit unit 41 of the playback structure 4 is assembled on the top surface of the flat portion 751 of the supporting base 75 of the driving unit 7 .

The signal reading unit 8 has a first support bracket 811 arranged at the bottom of the support base 75 of the drive unit 7, a second support frame wrapped around the bottom side of the first support bracket 811 and fixed to the bottom side of the flat plate portion 751 of the support base 75. Bracket 812, the first shading plate 82 fixed on the bottom end of the rotating sleeve 77 which rotates synchronously with the first turntable 61, the first reading plate 82 fixed on the upper end of the first supporting bracket 811 and reading the first reading of the first shading plate 82. The first photointerrupter 83 for taking the signal, the second light-shielding plate 84 fixed at the end of the rotating shaft 71 that rotates synchronously with the second turntable 62, and the second light-shielding plate 84 that is arranged in the gap at the lower end of the first support bracket 811 and reads The second photointerrupter 85 for the second reading signal. The read first and second read signals are sent to the circuit unit 41 .

The principle of the first and second photointerrupters 83 and 85 reading the details of the first and second light-shielding sheets 82 and 84 belongs to the category of the prior art, and is not the focus of this application, so it will not be described in detail here.

The signal reading unit 8 further has a first fixed seat 86 for erecting the first light-shielding sheet 82 and fixed on the rotating shaft 71, and a second fixed seat 86 for erecting the second light-shielding sheet 84 and positioned below the first fixing seat 86. Two fixing seats 87 , a washer 881 disposed between the first fixing seat 86 and the second fixing seat 87 , and a bearing 882 arranged between the rotating shaft 71 and the first fixing seat 86 . By means of the bearing 882, the first and second turntables 61, 62 can rotate synchronously without external force, and when the second turntable 62 is subjected to an external force, the first turntable 61 can still be driven by the electromagnetic rotating seat 73 Continue to maintain the predetermined rotation speed.

The first and second reading signals read by the first and second photointerrupters 83 and 85 are sent to the circuit unit 41 of the playback structure 4 . The first reading signal provides the circuit unit 41 to control and maintain the rotating speed of the electromagnetic rotating base 73, and the second reading signal provides the phase change of the circuit unit 41, so that the circuit unit 41 can make the playback structure 4 play according to the second reading signal Matching music. The principles and detailed structures used by the first and second light-shielding sheets 82, 84 and the first and second photointerrupters 83, 85 are all known in the technical field, and are the focus of improvement of this application from time to time, so they will not be repeated here. .

When the electromagnetic rotating base 73 drives the first and second rotating disks 61, 62 and the coupling piece 63 of the rotating disk unit 6 to rotate synchronously, the second rotating disk 62 rotates the first and second light-shielding sheets 82, 84 at the same speed with the rotating shaft 71, and When the DJ personnel blocked the second turntable 62 to continue to rotate with their hands, the first turntable 61 and the first light-shielding sheet 82 would still continue to rotate at a predetermined speed. , the second light-shielding plate 84 linked with the second turntable 62 will also be synchronously changed in speed and direction, so that the second photointerrupter 85 can read the second read signal with a different phase, and the second The read signal is sent to the circuit unit 41 of the playback structure 4 .

Furthermore, when the first turntable 61 is also decelerated due to excessive use by the DJ personnel, the first photointerrupter 83 will read the first reading signal obtained from the first light-shielding sheet 82 after the deceleration of the first turntable 61, The first reading signal will be sent to the circuit unit 41 to increase the current, so that the second turntable 62 will immediately rotate at the same speed as the first turntable 61 and the coupling piece 63 without being affected by external force. As for the aforementioned technical content that the electric current can be adjusted by the circuit unit 41 , it belongs to the conventional technical field and will not be described in detail here.

Therefore, when the utility model is running normally, the first and second turntables 61, 62 and the coupling piece 63 of the turntable unit 6 will be driven by the electromagnetic rotating seat 73 of the drive unit 7 to rotate synchronously. Just like playing a traditional vinyl record.

When the first and second turntables 61, 62 of the turntable unit 6 rotate synchronously, the playback structure 4 will emit normal sound effects; The first and second turntables 61 and 62 do not rotate synchronously, the second photointerrupter 85 will read the second reading signal with different phase data, and send it to the circuit unit 41, so that the playback structure produces a special sound effect .

As mentioned above, the utility model not only can be used for DJ personnel to carry out different music changes with CD records, but also has the following effects and advantages:

1. Eliminate the doubts of dust and dirt: the utility model uses the first and second shading sheets 82 and 84 and the first and second photoelectric interrupters 83 and 85 for reading the first and second shading sheets 82 and 84 Installed in the assembly space 31 of the casing 3, it can surely prevent dust and dirt from adhering.

2. It can provide the fun of simulating the operation of traditional vinyl records, and has better simulation effects: the control structure 5 of the digital audio player 2 of the present utility model provides DJ personnel with traditional operating techniques to perform music changes, and can be used as a digital audio player. 2. When playing music and the turntable unit 6 is not subjected to external force, the second turntable 62 of the turntable unit 6 will start to rotate, which is just like the rotation state when playing a traditional vinyl record, and then the DJ personnel can directly apply force to the second turntable 62, so as to change the rotation speed and direction of the second light-shielding sheet 84. At this time, the second photointerrupter 85 will read the second light-shielding sheet 84 to obtain the second read signal with different phases, and then play out the changed music.

From the description of the above functions and advantages, it can be seen that the utility model has better durability, and can cooperate with DJ personnel to fully simulate the state of traditional operation of vinyl records, and can indeed achieve the purpose of the utility model.

Claims (2)

1. A digital audio player, characterized in that it comprises a hollow housing forming an assembly space, a playback structure assembled in the housing and a control structure electrically connected to the playback structure; the playback structure has a circuit unit and a circuit unit A disc reading unit that is electrically connected and capable of reading discs; the control structure has a turntable unit that can be relatively rotatably installed on the top side of the casing, a drive unit that is arranged in the housing assembly space and drives the turntable unit to rotate, and is arranged on the casing. The signal reading unit in the body assembly space; the turntable unit has a first turntable relatively close to the housing, a second turntable arranged at intervals on the top side of the first turntable and rotated synchronously/asynchronously with the first turntable, and a second turntable arranged on the first, Between the two turntables and its two sides are detachably combined with the first and second turntables; the drive unit has a rotating shaft that passes through the housing and rotates synchronously with the turntable unit, an electromagnetic fixing seat that is fixed around the rotating shaft and Relatively rotate the electromagnetic rotating seat which is arranged on the outer side of the electromagnetic fixed seat and drives the turntable unit to rotate; the signal reading unit has a first support bracket arranged at the bottom of the drive unit, a first shading sheet which rotates synchronously with the first turntable, and a fixed The first photointerrupter on the upper end of the first support bracket and reads the first reading signal of the first light-shielding plate, the second light-shielding plate fixed at the end of the rotating shaft for synchronous rotation, and the second light-shielding plate set at the lower end of the first support bracket And read the second photointerrupter of the second reading signal of the second shading plate; the read first and second reading signals are sent to the circuit unit. 2. The digital audio player according to claim 1, characterized in that the drive unit has a support seat arranged in the shell assembly space and fixedly connected with the shell, a center seat set in the middle of the support seat, A rotating sleeve that is sheathed outside the rotating shaft and rotates synchronously with the first turntable of the turntable unit, a heat-dissipating copper sleeve arranged between the turnable sleeve and the center seat, and a joint that connects the top end of the rotating sleeve and the first turntable of the turntable unit; The rotating shaft system is pivoted on the center base and rotates synchronously with the second turntable of the turntable unit; the electromagnetic fixing base surrounds the outer side of the rotating shaft and is fixedly connected with the center base.

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