CN201928241U - Portable voice frequency amplifying device - Google Patents
Portable voice frequency amplifying device Download PDFInfo
- Publication number
- CN201928241U CN201928241U CN201020677736XU CN201020677736U CN201928241U CN 201928241 U CN201928241 U CN 201928241U CN 201020677736X U CN201020677736X U CN 201020677736XU CN 201020677736 U CN201020677736 U CN 201020677736U CN 201928241 U CN201928241 U CN 201928241U
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- circuit
- amplifying device
- charging
- over switch
- amplifier circuit
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Abstract
The utility model discloses a portable voice frequency amplifying device, which comprises a casing (1), wherein a voice frequency amplifying circuit (2), a rechargeable battery (3) and a charging circuit (4) are arranged in the casing and an input socket (5) and an earphone socket (6) are arranged on the casing. The input socket is connected with a change-over switch (7) which is also connected with the voice frequency circuit and the charging circuit. The amplifying device adopts a combined type space design to narrow the size of a main body, thereby being convenient for carrying. The amplifying device provides excellent sound quality with a high signal to noise ratio by a compact high-performance circuit design. Headphone amplifiers with exchangeable batteries provided at the present markets utilize primary batteries, therefore, the headphone amplifiers are needed to be disassembled to replace batteries which have been used up with new ones. The amplifying device combines the charging circuit and the main voice frequency amplifying circuit, is internally provided with a rechargeable nickel-metal hydride battery, thereby the battery can be charged repeatedly, free of the problem of frequent disassemblies. Charging and power supplying can be switched by only one button with simultaneous indication of an indicating light. No power is offered when charging the battery to prevent circuits from being damaged by large currents so that the amplifying device is safe and reliable.
Description
Technical field
The utility model relates to a kind of signal of telecommunication amplifying device, particularly relates to a kind of portable audio amplifying device, belongs to the portable structure technical field.
Background technology
It is little that player such as MP3, MP4 has a volume, and portable characteristics more and more are subjected to liking of people.But because the sound output of these players is too little, so sound has listened bass and high pitch effect not ideal.So some people is in when listening to the music, MP3 is appreciated by power amplifier, to obtain comparatively ideal frequency response effect.But use because most power amplifier all is an external power supply, and the power amplifier volume is bigger, can't carry.For the ease of carrying, also occurred some portable small-sized power amplifiers successively on the market now, but be to need to change battery mostly, in order to reduce use cost, be to adopt the 3V low voltage power supply mostly, it still is undesirable amplifying the back acoustics.
The utility model content
The purpose of this utility model is, a kind of compact conformation is provided, and volume is little, portable portable audio amplifying device.Charging circuit is combined with audio amplifier circuit, and built-in rechargeable battery can be a battery charge repeatedly, removes bothering of frequent replacing battery from, reduces use cost.
The technical solution of the utility model: a kind of portable audio amplifying device, comprise shell, be provided with audio amplifier circuit, rechargeable battery and charging circuit in the shell, shell is provided with input socket and earphone socket; Input socket is connected with change over switch, and change over switch is connected with charging circuit with audio amplifier circuit.
In the aforementioned portable audio amplifying device, described change over switch is a commutator, and the mid point of change over switch and rechargeable battery are anodal to be connected, and one of two transfer point of change over switch are connected with charging circuit, and another is connected with audio amplifier circuit.
In the aforementioned portable audio amplifying device, described shell is provided with volume adjustment device, and volume adjustment device is connected with audio amplifier circuit.
In the aforementioned portable audio amplifying device, described shell is provided with the screw arm, and the screw of shell in the screw arm is connected with cap.
In the aforementioned portable audio amplifying device, described cap is provided with charging indicator light and relay indicating light, and charging indicator light is connected with charging circuit through lead; Relay indicating light is connected with indicating circuit in the audio amplifier circuit through lead.
In the aforementioned portable audio amplifying device, the junction of described shell and cap is provided with boss or groove.
In the aforementioned portable audio amplifying device, described audio amplifier circuit is the audio amplifier circuit that is made of NE5532 audio frequency amplifier integrated block and peripheral cell, and operating voltage is 9V.
In the aforementioned portable audio amplifying device, described rechargeable battery is the chargeable stacked battery of 9V; Charging circuit is the charging circuit that is made of three terminal regulator and charging indication.
Compared with prior art, the utlity model has following characteristics;
1, compact conformation, volume is little, is easy to carry;
2, charging circuit is combined with audio amplifier circuit, built-in rechargeable battery can be a battery charge repeatedly, removes bothering of frequent replacing battery from, reduces use cost;
3, adopting 9V voltage is the audio amplifier circuit power supply that NE5532 audio frequency amplifier integrated block and peripheral cell constitute, and improves the signal to noise ratio of amplifying circuit, and can improve the high and low frequency effect that promotes in the audio frequency, obtains good tonequality;
4, the signal input and the shared input socket that charges can be saved an input socket;
5, charge by change over switch and magnifying state conversion, when change over switch is positioned at charged state, disconnect audio amplifier circuit, input socket is connected with charge power supply, and rechargeable battery is charged.When change over switch was positioned at magnifying state, input socket was connected with signal source, disconnected charging circuit.Prevent that big electric current from damaging audio amplifier circuit, safe in utilization, reliable;
6, be provided with volume adjustment knob and can regulate volume as required, be provided with charging indicator light and amplify indicator light, so that understand operating state at any time.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the audio amplifier circuit schematic diagram in the utility model;
Fig. 3 is the amplification indicating circuit in the utility model;
Fig. 4 is the charging indication in the utility model.
Being labeled as in the accompanying drawing: 1-shell, 2-audio amplifier circuit, 3-rechargeable battery, the 4-charging circuit, 5-input socket, 6-earphone socket, the 7-change over switch, 8-volume adjustment device, 9-screw arm, the 10-cap, 11-charging indicator light, 12-relay indicating light, the 13-lead, 14-boss or groove, 15-NE5532 audio frequency amplifier integrated block, 16-three terminal regulator.
Embodiment
The utility model is described in further detail below in conjunction with drawings and Examples, but not as to any restriction of the present utility model.
Embodiment.The utility model as shown in Figure 1, a kind of portable audio amplifying device comprises shell 1, is provided with audio amplifier circuit 2, rechargeable battery 3 and charging circuit 4 in the shell 1, shell 1 is provided with input socket 5 and earphone socket 6; Input socket 5 is connected with change over switch 7, and change over switch 7 is connected with charging circuit 4 with audio amplifier circuit 2.Described change over switch 7 is commutators, and 3 anodal connections of the mid point of change over switch 7 and rechargeable battery, one of two transfer point of change over switch 7 are connected with charging circuit 4, and another is connected with audio amplifier circuit 2.Described shell 1 is provided with volume adjustment device 8, and volume adjustment device 8 is connected with audio amplifier circuit 2.Described shell 1 is provided with screw arm 9, and the screw of shell 1 in screw arm 9 is connected with cap 10.Described cap 10 is provided with charging indicator light 11 and relay indicating light 12, and charging indicator light 11 is connected with charging circuit 4 through lead 13; Relay indicating light 12 is connected with indicating circuit in the audio amplifier circuit 2 through lead 13.The junction of described shell 1 and cap 10 is provided with boss or groove 14.Described audio amplifier circuit 2 is the audio amplifier circuits that are made of NE5532 audio frequency amplifier integrated block 15 and peripheral cell, and operating voltage is 9V.Described rechargeable battery 3 is the chargeable stacked batteries of 9V; Charging circuit 4 is the charging circuits that are made of three terminal regulator 16 and charging indication.
During concrete enforcement, shell of the present utility model is not defined as cube shown in Figure 1, can be arbitrary shape.Be provided with charging circuit 4 and audio amplifier circuit 2 and rechargeable battery 3 in the shell, being charged as 9V charging circuit 4 and audio amplifier circuit 2 can be installed on the circuit board, also can be installed in respectively on two circuit boards, specifically can arrange according to the shape and the size of shell.
The audio amplifier circuit that audio amplifier circuit 2 is made of the NE5532 integrated package, physical circuit are as shown in Figure 2.The NE5532 integrated package is a kind of two-way low noise high speed audio operational amplifier, and the audio amplifier circuit signal to noise ratio that is made of this integrated circuit is low, and can promote the high and low frequency effect in the audio frequency, obtains good tonequality.
Input jack of the present utility model is connected with change over switch, when change over switch is positioned at charging one end, input jack is connected with the DC power supply of charger, rechargeable battery in the utility model is charged, rechargeable battery of the present utility model is the 9V rechargeable nickel-hydrogen battery, the charging indication that is positioned at during charging on the lid is lighted, and indication is charged, and circuit as shown in Figure 4.After charging finished, the DC power supply of pulling up charger got final product, and did not need to stir change over switch again.
When needs are listened to the music, change over switch to be dialled to amplifying an end, this moment, audio frequency amplifier was started working, and the indicator light of indication amplifying circuit work is lighted, and amplifies indicating circuit as shown in Figure 3.At this moment the signal output socket with MP3 is connected with input socket of the present utility model, and the signal of MP3 is exported by earphone socket of the present utility model after audio frequency amplifier of the present utility model amplifies, and earphone is inserted in the earphone socket of the present utility model listens to the music.Change over switch plays the conversion effect, charges and the magnifying state conversion by change over switch, when change over switch is positioned at charged state, disconnects audio amplifier circuit, and input socket is connected with charge power supply, and rechargeable battery is charged.When change over switch was positioned at magnifying state, input socket was connected with signal source, disconnected charging circuit.Prevent that big electric current from damaging audio amplifier circuit, safe in utilization, reliable; In order to regulate volume, volume adjustment device can be set, volume adjustment device can be a rotating potentiometer, can be the slidingtype variable resistor also, looks concrete condition and personal like and is provided with.
Claims (8)
1. a portable audio amplifying device comprises shell (1), it is characterized in that: be provided with audio amplifier circuit (2), rechargeable battery (3) and charging circuit (4) in the shell (1), shell (1) is provided with input socket (5) and earphone socket (6); Input socket (5) is connected with change over switch (7), and change over switch (7) is connected with charging circuit (4) with audio amplifier circuit (2).
2. according to the described portable audio amplifying device of claim 1, it is characterized in that: described change over switch (7) is a commutator, the mid point of change over switch (7) is connected with rechargeable battery (3) is anodal, one of two transfer point of change over switch (7) are connected with charging circuit (4), and another is connected with audio amplifier circuit (2).
3. according to the described portable audio amplifying device of claim 2, it is characterized in that: described shell (1) is provided with volume adjustment device (8), and volume adjustment device (8) is connected with audio amplifier circuit (2).
4. according to the described portable audio amplifying device of claim 1, it is characterized in that: described shell (1) is provided with screw arm (9), and the screw of shell (1) in screw arm (9) is connected with cap (10).
5. according to the described portable audio amplifying device of claim 4, it is characterized in that: described cap (10) is provided with charging indicator light (11) and relay indicating light (12), and charging indicator light (11) is connected with charging circuit (4) through lead (13); Relay indicating light (12) is connected with indicating circuit in the audio amplifier circuit (2) through lead (13).
6. according to the described portable audio amplifying device of claim 4, it is characterized in that: the junction of described shell (1) and cap (10) is provided with boss or groove (14).
7. portable audio amplifying device according to claim 1 is characterized in that: described audio amplifier circuit (2) is the audio amplifier circuit that is made of NE5532 audio frequency amplifier integrated block (15) and peripheral cell, and operating voltage is 9V.
8. according to the described portable audio amplifying device of claim 1 claim, it is characterized in that: described rechargeable battery (3) is the chargeable stacked battery of 9V; Charging circuit (4) is the charging circuit that is made of three terminal regulator (16) and charging indication.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020677736XU CN201928241U (en) | 2010-12-23 | 2010-12-23 | Portable voice frequency amplifying device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020677736XU CN201928241U (en) | 2010-12-23 | 2010-12-23 | Portable voice frequency amplifying device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201928241U true CN201928241U (en) | 2011-08-10 |
Family
ID=44432075
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201020677736XU Expired - Fee Related CN201928241U (en) | 2010-12-23 | 2010-12-23 | Portable voice frequency amplifying device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201928241U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108076598A (en) * | 2016-11-14 | 2018-05-25 | 英业达科技有限公司 | Electronic device |
-
2010
- 2010-12-23 CN CN201020677736XU patent/CN201928241U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108076598A (en) * | 2016-11-14 | 2018-05-25 | 英业达科技有限公司 | Electronic device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110810 Termination date: 20121223 |