CN214045986U - Low-distortion power amplifier device - Google Patents
Low-distortion power amplifier device Download PDFInfo
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- CN214045986U CN214045986U CN202120375039.7U CN202120375039U CN214045986U CN 214045986 U CN214045986 U CN 214045986U CN 202120375039 U CN202120375039 U CN 202120375039U CN 214045986 U CN214045986 U CN 214045986U
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- fixing block
- pass filter
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Abstract
The utility model provides a low distortion power amplifier device, which comprises a power amplifier body, wherein the front end of the power amplifier body is provided with an input end and a tuning knob, the input end is electrically connected with a high-pass filter for eliminating a secondary low-frequency signal and keeping low distortion, and the high-pass filter is electrically connected with a front-end amplifying circuit; power amplifier body front side still is equipped with keeps away dirt mechanism and is used for avoiding power amplifier body front end interface dust accumulation, it includes drive unit to keep away dirt mechanism, dustproof curtain and the transmission unit of establishhing relatively, drive unit inlays in power amplifier body both sides, drive unit includes the gear box, micro motor and drive shaft just are used for driving transmission unit and drive dustproof curtain horizontal migration, transmission unit is including being in on same water flat line and the transmission assembly of establishhing relatively, transmission assembly includes two side fixed blocks, fixed block in at least one, a plurality of connecting rods and brush. The utility model discloses an input adds high pass filter and eliminates intermodulation distortion to avoid the interface deposition through keeping away dirt mechanism.
Description
Technical Field
The utility model belongs to the technical field of power amplifier equipment, concretely relates to low distortion power amplifier device.
Background
The power amplifier is the largest family of various sound equipment and mainly has the function of amplifying a weak signal input by a sound source equipment and then generating enough current to push a loudspeaker to replay sound. The power, impedance, distortion, dynamic state, different application ranges and control and regulation functions are considered, different power amplifiers are different in internal signal processing, circuit design and production process, wherein the distortion degree directly influences the output signal value of the power amplifier, so that the low-distortion power amplifier equipment is widely applied to high-grade multimedia electric classrooms, training rooms, small conference rooms or other sound amplification occasions.
In the prior art, signals of various different frequencies easily cause nonlinear distortion after passing through the power amplifier equipment, namely intermodulation distortion, the intermodulation distortion can make the definition of the whole low-distortion power amplifier equipment descend, a sound field lacks layering sense, the tone quality is poor, and meanwhile, when the low-distortion power amplifier equipment is used for a long time or placed for a long time, the dust is easily accumulated in an interface, and the tone quality is easily damaged due to poor contact.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a low distortion power amplifier device, the input is add high pass filter and is eliminated intermodulation distortion to avoid the interface deposition through keeping away dirt mechanism.
The utility model provides a following technical scheme:
a low-distortion power amplifier device comprises a power amplifier body, wherein the front end of the power amplifier body is provided with an input end and a tuning knob, the input end is electrically connected with a high-pass filter for eliminating a secondary low-frequency signal and keeping low distortion degree, the high-pass filter is electrically connected with a front-end amplifying circuit, the tuning knob is electrically connected with a tuning circuit, the front-end amplifying circuit is electrically connected with the tuning circuit, the tuning circuit is also electrically connected with a frequency dividing circuit, the frequency dividing circuit is electrically connected with a power amplifying circuit, and the power amplifying circuit is electrically connected with a power module and a loudspeaker; the front side of the power amplifier body is also provided with a dust avoiding mechanism for avoiding dust accumulation at the front end interface of the power amplifier body, the dust avoiding mechanism comprises a driving unit, a dust-proof curtain and a transmission unit which are oppositely arranged, the driving unit is embedded in the two sides of the power amplifier body, the driving unit comprises a gear box, a micro motor and a driving shaft and is used for driving the transmission unit to drive the dustproof curtain to horizontally move, the transmission unit comprises transmission components which are arranged on the same horizontal line and are opposite to each other, the transmission components comprise two side fixed blocks, at least one middle fixed block, a plurality of connecting rods and a brush, one end of the connecting rod is provided with a tooth-shaped head and is arranged at one side of the side fixing block and the middle fixing block through the tooth-shaped head, the tooth-shaped heads of the connecting rods on the middle fixing block are meshed and connected, and the brush is arranged on one side of the side fixing block far away from one end of the edge of the power amplifier body and one side of the middle fixing block far away from the connecting rods.
Preferentially, the front side of the power amplifier body is provided with an upper chute and a lower chute respectively, and the upper and lower sides of the power amplifier body are located on the tuning knob.
Preferentially, the end, far away from the connecting rod, of the side fixing block and the middle fixing block is provided with an inserting block, and the inserting block is inserted into the upper sliding groove.
Preferentially, one of the side fixing blocks is connected with the edge of the power amplifier body through a fastener, the other end of the connecting rod on the side fixing block is connected with the other end of the connecting rod on the middle fixing block, and one end, far away from the tooth-shaped head, of the connecting rod is connected with the dustproof curtain.
Preferentially, a proximity sensor is embedded on one side of the side fixing block, far away from the edge of the power amplifier body, of the transmission assembly on one side, and the proximity sensor is electrically connected with the micro motor.
Preferentially, the lower end of the dustproof curtain is inserted with a sliding rod, the sliding rod is inserted into a lower sliding groove, supporting plates are attached to two sides of the dustproof curtain and used for keeping the edges of two sides of the dustproof curtain straight, the upper end of each supporting plate is fixedly connected with a side fixing block on a vertical axis, and iron sheets or magnetic sheets are embedded at the bottom of the supporting plate far away from the edge of the power amplifier body.
Preferably, the micro motor is connected with a gear box, the gear box is connected with a driving shaft, the driving shaft is connected with a driving gear, and the driving gear is meshed with a tooth-shaped head of a side fixing block fixedly arranged on the power amplifier body.
Preferably, the high-pass filter includes an active high-pass filter, the active high-pass filter is electrically connected to the power module, and the speaker is electrically connected to the power module.
Preferentially, a plurality of shock pads are arranged below the power amplifier body.
The utility model has the advantages that:
1. a high-pass filter is additionally arranged between the input end and the front-end amplifying circuit to eliminate secondary low-frequency signals and further keep the low distortion degree of the power amplifying equipment;
2. keep away among the dirt mechanism, impel drive gear through drive unit and rotate, the drive gear drive is fixed in the cusp head of the side fixed block on the power amplifier body and rotates, the cusp head moves the connecting rod and rotates, the connecting rod drives adjacent connecting rod, the side fixed block of well fixed block and the other end is horizontal migration in last spout, and drive dustproof curtain horizontal migration, open through opening of proximity sensor control micro motor, the magnetic sheet and the iron sheet of backup pad lower extreme inhale mutually and make the dustproof curtain concatenation of both sides closed this moment, avoid interface deposition such as input.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a front view of the connection of the present invention;
fig. 2 is a front connection schematic diagram of the transmission unit of the present invention;
fig. 3 is a schematic top connection diagram of the transmission unit of the present invention;
fig. 4 is a schematic diagram of the input terminal connection of the present invention.
Labeled as: 1. the power amplifier comprises a power amplifier body, 11 input ends, 111 a high-pass filter, 12 a tuning knob, 121 a tuning circuit, 13 a front-end amplifying circuit, 14 a frequency dividing circuit, 15 a power amplifying circuit, 16 a power module, 17 a loudspeaker, 18 an upper sliding groove, 181 a lower sliding groove, 19 a shock pad, 2 a dust-proof mechanism, 3 a driving unit, 31 a micro motor, 32 a gear box, 33 a driving shaft, 34 a driving gear, 4 a dust-proof curtain, 41 a sliding rod, 42 a supporting plate, 421 an iron sheet, 422 a magnetic sheet, 5 a transmission unit, 6 a transmission assembly, 61 a side fixing block, 611 a proximity sensor, 62 a middle fixing block, 63 a connecting rod, 631 a tooth-shaped head and 64 a brush.
Detailed Description
As shown in fig. 1 and 4, a low distortion power amplifier device comprises a power amplifier body 1, an input end 11 and a tuning knob 12 are arranged at the front end of the power amplifier body 1, a plurality of shock absorbing pads 19 are arranged below the power amplifier body 1, an upper chute 18 and a lower chute 181 are respectively arranged at the front side of the power amplifier body 1 and at the upper side and the lower side of the tuning knob 12, the input end 11 is electrically connected with a high pass filter 111 for eliminating a sub-low frequency signal and keeping low distortion, the high pass filter 111 comprises an active high pass filter 111, the high pass filter 111 is electrically connected with a front end amplifying circuit 13, the tuning knob 12 is electrically connected with a tuning circuit 121, the front end amplifying circuit 13 is electrically connected with the tuning circuit 121, the tuning circuit 121 is also electrically connected with a frequency dividing circuit 14, the frequency dividing circuit 14 is used for reducing noise pollution and improving definition, the frequency dividing circuit 14 is electrically connected with a power amplifying circuit 15, the power amplifying circuit 15 is electrically connected with a power module 16 and a loudspeaker 17, the active high pass filter 111 is electrically connected to the power module 16, and the speaker 17 is electrically connected to the power module 16.
As shown in fig. 1-2, the front side of the power amplifier body 1 is further provided with a dust-proof mechanism 2 for avoiding dust accumulation at the front end interface of the power amplifier body 1, the dust-proof mechanism 2 comprises a driving unit 3, a dust-proof curtain 4 and a transmission unit 5 which are relatively arranged, the driving unit 3 is embedded in two sides of the power amplifier body 1, the driving unit 3 comprises a gear box 32, a micro motor 31 and a driving shaft 33 are used for driving the transmission unit 5 to drive the dust-proof curtain 4 to move horizontally, the micro motor 31 is connected with the gear box 32, the driving shaft 33 is connected with a driving gear 34, the driving gear 34 is meshed with a tooth-shaped head 631 fixedly arranged on a side fixing block 61 on the power amplifier body 1, the micro motor 31 is electrically connected with a frequency converter or a reversing switching circuit, and is used for changing the steering of the micro motor 31.
As shown in fig. 2-3, the transmission unit 5 includes transmission components 6 disposed on the same horizontal line and opposite to each other, the transmission components 6 include two side fixing blocks 61, at least one middle fixing block 62, a plurality of connecting rods 63 and a brush 64, one end of the connecting rod 63 is provided with a tooth-shaped head 631 and disposed on one side of the side fixing block 61 and the middle fixing block 62 through the tooth-shaped head 631, the tooth-shaped heads 631 of the connecting rods 63 on the middle fixing block 62 are engaged and connected, the brush 64 is disposed on one side of the side fixing block 61 and the middle fixing block 62 away from the connecting rod 63 on one end of the edge of the power amplifier body 1, an insertion block is disposed on one end of the side fixing block 61 and the middle fixing block 62 away from the connecting rod 63 and inserted into the upper chute 18, one of the side fixing blocks 61 is connected with the edge of the power amplifier body 1 through a fastener, the other end of the connecting rod 63 on the side fixing block 61 is connected with the other end of the connecting rod 63 on the middle fixing block 62, one end of the connecting rod 63, which is far away from the tooth-shaped head 631, is connected with the dust curtain 4, and a proximity sensor 611 is embedded at one side of the side fixing block 61, which is far away from the edge of the power amplifier body 1, of the side transmission component 6, and the proximity sensor 611 is electrically connected with the micro motor 31.
As shown in fig. 1, a sliding rod 41 is inserted into the lower end of the dust-proof curtain 4, the sliding rod 41 is inserted into the lower chute 181, support plates 42 are respectively attached to two sides of the dust-proof curtain 4 for keeping two side edges of the dust-proof curtain 4 straight, the upper end of each support plate 42 is fixedly connected with a side fixing block 61 on the same vertical axis, and an iron sheet 421 or a magnetic sheet 422 is embedded in the bottom of each support plate 42 far away from the edge of the power amplifier body 1. The driving gear 34 is driven to rotate by the driving unit 3, the driving gear 34 drives the tooth-shaped head 631 of the side fixing block 61 fixed on the power amplifier body 1 to rotate, the tooth-shaped head 631 drives the connecting rod 63 to rotate, the connecting rod 63 drives the adjacent connecting rod 63, the middle fixing block 62 and the side fixing block 61 at the other end to horizontally move in the upper chute 18 and drives the dustproof curtain 4 to horizontally move, the start and stop of the micro motor 31 are controlled by the proximity sensor 611, at this time, the magnetic sheet 422 at the lower end of the supporting plate 42 is attracted to the iron sheet 421 and the dustproof curtains 4 at the two sides are spliced and closed, so that the dust accumulation at the interfaces of the input end 11 and the like is avoided, when the power amplifier is used, the steering direction of the micro motor 31 is changed by a frequency converter or a reversing switching circuit, the driving gear 34 is reversely driven to rotate, the connecting rod 63, the middle fixing block 62 and the side fixing block 61 carry the dustproof curtain 4 to reversely and horizontally move, and the dustproof curtain 4 is folded and exposes the interfaces of the input end 11 and the like, is convenient for use.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The utility model provides a low distortion power amplifier device, includes the power amplifier body, its characterized in that: the power amplifier comprises a power amplifier body and is characterized in that the front end of the power amplifier body is provided with an input end and a tuning knob, the input end is electrically connected with a high-pass filter for eliminating a secondary low-frequency signal and keeping low distortion degree, the high-pass filter is electrically connected with a front-end amplifying circuit, the tuning knob is electrically connected with a tuning circuit, the front-end amplifying circuit is electrically connected with the tuning circuit, the tuning circuit is also electrically connected with a frequency dividing circuit, the frequency dividing circuit is electrically connected with a power amplifying circuit, and the power amplifying circuit is electrically connected with a power module and a loudspeaker; the front side of the power amplifier body is also provided with a dust avoiding mechanism for avoiding dust accumulation at the front end interface of the power amplifier body, the dust avoiding mechanism comprises a driving unit, a dust-proof curtain and a transmission unit which are oppositely arranged, the driving unit is embedded in the two sides of the power amplifier body, the driving unit comprises a gear box, a micro motor and a driving shaft and is used for driving the transmission unit to drive the dustproof curtain to horizontally move, the transmission unit comprises transmission components which are arranged on the same horizontal line and are opposite to each other, the transmission components comprise two side fixed blocks, at least one middle fixed block, a plurality of connecting rods and a brush, one end of the connecting rod is provided with a tooth-shaped head and is arranged at one side of the side fixing block and the middle fixing block through the tooth-shaped head, the tooth-shaped heads of the connecting rods on the middle fixing block are meshed and connected, and the brush is arranged on one side of the side fixing block far away from one end of the edge of the power amplifier body and one side of the middle fixing block far away from the connecting rods.
2. The low distortion power amplifier device of claim 1, wherein: and the upper side and the lower side of the power amplifier body, which are positioned on the upper side and the lower side of the tuning knob, are respectively provided with an upper chute and a lower chute.
3. The low distortion power amplifier device of claim 2, wherein: the side fixed block and the middle fixed block are provided with an insertion block at one end far away from the connecting rod, and the insertion block is inserted into the upper chute.
4. The low distortion power amplifier device of claim 3, wherein: one of the side fixing blocks is connected with the edge of the power amplifier body through a fastener, the other end of the connecting rod on the side fixing block is connected with the other end of the connecting rod on the middle fixing block, and one end, far away from the tooth-shaped head, of the connecting rod is connected with the dustproof curtain.
5. The low-distortion power amplifier device according to claim 4, wherein: and a proximity sensor is embedded in one side of the side fixing block of the transmission component on one side, which is far away from the edge of the power amplifier body, and the proximity sensor is electrically connected with the micro motor.
6. The low distortion power amplifier device of claim 5, wherein: the power amplifier is characterized in that a sliding rod is inserted at the lower end of the dustproof curtain, the sliding rod is inserted in the lower sliding groove, supporting plates are attached to two sides of the dustproof curtain and used for keeping the edges of two sides of the dustproof curtain straight, the upper end of each supporting plate is fixedly connected with a side fixing block on a vertical axis, and iron sheets or magnetic sheets are embedded at the bottom of each supporting plate far away from the edge of the power amplifier body.
7. The low distortion power amplifier device of claim 6, wherein: the micro motor is connected with the gear box, the gear box is connected with the driving shaft, the driving shaft is connected with the driving gear, and the driving gear is meshed with the toothed head of the side fixing block fixedly arranged on the power amplifier body.
8. The low distortion power amplifier device of claim 1, wherein: the high-pass filter comprises an active high-pass filter, the active high-pass filter is electrically connected with the power supply module, and the loudspeaker is electrically connected with the power supply module.
9. The low distortion power amplifier device of claim 1, wherein: a plurality of shock pads are arranged below the power amplifier body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120375039.7U CN214045986U (en) | 2021-02-18 | 2021-02-18 | Low-distortion power amplifier device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120375039.7U CN214045986U (en) | 2021-02-18 | 2021-02-18 | Low-distortion power amplifier device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214045986U true CN214045986U (en) | 2021-08-24 |
Family
ID=77348144
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120375039.7U Active CN214045986U (en) | 2021-02-18 | 2021-02-18 | Low-distortion power amplifier device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214045986U (en) |
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2021
- 2021-02-18 CN CN202120375039.7U patent/CN214045986U/en active Active
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