CN204633320U - A kind of audio-video frequency media centring system - Google Patents
A kind of audio-video frequency media centring system Download PDFInfo
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- CN204633320U CN204633320U CN201520248593.3U CN201520248593U CN204633320U CN 204633320 U CN204633320 U CN 204633320U CN 201520248593 U CN201520248593 U CN 201520248593U CN 204633320 U CN204633320 U CN 204633320U
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Abstract
The utility model discloses a kind of audio-video frequency media centring system, comprise aviation case, audio frequency apparatus, video equipment and power amplifier, audio frequency apparatus, video equipment and power amplifier are all placed in aviation case, audio frequency apparatus is connected with power amplifier respectively with video equipment, audio-video frequency media centring system also comprises short-circuit protection circuit, short-circuit protection circuit is connected with the power end of power amplifier and the output of power amplifier respectively, the power end of power amplifier accesses external power source by short-circuit protection circuit, the output whether short circuit when the output short circuit of power amplifier external power source is cut off of short-circuit protection circuit for detecting power amplifier, advantage is after the short circuit of power amplifier output, can cut off with external power source at once, and audio frequency apparatus and video equipment can not be caused to damage.
Description
Technical field
The utility model relates to a kind of audio-visual system, especially relates to a kind of audio-video frequency media centring system.
Background technology
Existing audio-video frequency media centring system generally includes aviation case, audio frequency apparatus, video equipment and power amplifier, and audio frequency apparatus, video equipment and power amplifier are all placed in aviation case, and audio frequency apparatus is connected with power amplifier respectively with video equipment.When using audio frequency apparatus or video equipment, the power end of power amplifier and external power source are connected, power amplifier enters operating state.
But existing audio-video frequency media centring system exists following problem: when after the short circuit of power amplifier output, cannot cut off with external power source at once, easily cause the damage of audio frequency apparatus and video equipment.
Summary of the invention
Technical problem to be solved in the utility model is to provide a kind of after the short circuit of power amplifier output, can cut off with external power source at once, can not cause the audio-video frequency media centring system that audio frequency apparatus and video equipment damage.
The utility model solves the problems of the technologies described above adopted technical scheme: a kind of audio-video frequency media centring system, comprise aviation case, audio frequency apparatus, video equipment and power amplifier, described audio frequency apparatus, described video equipment and described power amplifier are all placed in aviation case, described audio frequency apparatus is connected with described power amplifier respectively with described video equipment, described audio-video frequency media centring system also comprises short-circuit protection circuit, described short-circuit protection circuit is connected with the power end of described power amplifier and the output of described power amplifier respectively, the power end of described power amplifier is by described short-circuit protection circuit access external power source, the output whether short circuit when the output short circuit of described power amplifier external power source is cut off of described short-circuit protection circuit for detecting described power amplifier.
Described short-circuit protection circuit comprises the first resistance, second resistance, 3rd resistance, 4th resistance, 5th resistance, 6th resistance, 7th resistance, 8th resistance, 9th resistance, tenth resistance, 11 resistance, 12 resistance, first electric capacity, second electric capacity, 3rd electric capacity, 4th electric capacity, first triode, second triode, 3rd triode, 4th triode, 5th triode, 6th triode, 7th triode, first diode, second diode, 3rd diode, switch and relay,
One end of the first described resistance is the first input end of described short-circuit protection circuit, one end of the second described resistance is the second input of described short-circuit protection circuit, the first input end of described short-circuit protection circuit is connected with the output of the second input with described power amplifier, the other end of the first described resistance, one end of the 3rd described resistance, one end of the 4th described resistance is connected with the base stage of the first described triode, the other end of the 3rd described resistance, the other end of the second described resistance is connected with the emitter of the first described triode, the other end of the 4th described resistance is connected with the positive pole of the first described diode, the minus earth of the first described diode, the collector electrode of the first described triode is connected with the negative pole of the second described diode, the positive pole of the second described diode is connected with one end of the 6th described resistance, the other end of the 6th described resistance, one end of the 5th described resistance, one end of the first described electric capacity is connected with the base stage of the second described triode, the other end of the 5th described resistance, the other end of the first described electric capacity is connected with the emitter of the second described triode and its link access 24V voltage, and the collector electrode of the second described triode is connected with one end of the 7th described resistance, the other end of the 7th described resistance, one end of the second described electric capacity, the collector electrode of the 3rd triode described in one end of the 8th described resistance is connected with the base stage of the 3rd described triode, the collector electrode of the 4th described triode, the collector electrode of the 5th described triode, one end of the tenth described resistance, one end of the 4th described electric capacity, one end of the 11 described resistance, one end of the 12 described resistance is connected with the collector electrode of the 6th described triode, the other end of the second described electric capacity, the other end of the 8th described resistance, the emitter of the 3rd described triode, the base stage of the 4th described triode, the emitter of the 5th described triode, one end of the 3rd described electric capacity, one end of the 9th described resistance, one end of described switch, the other end of the 4th described electric capacity, the other end of the 12 described resistance is connected and its link ground connection with the emitter of the 7th described triode, the emitter of the 4th described triode, the base stage of the 5th described triode, the other end of the 3rd described electric capacity is connected with the other end of the 9th described resistance, the other end of the tenth described resistance is connected with the other end of described switch, the other end of the 11 described resistance, the negative pole of the 3rd described diode is connected with the 4th pin of described relay, the positive pole of the 3rd described diode, the collector electrode of the 6th described triode, the collector electrode of the 7th described triode is connected with the 5th pin of described relay, the emitter of the 6th described triode is connected with the base stage of the 7th described triode, 1st pin of described relay is for accessing external power source, 3rd pin of described relay is connected with the power end of described power amplifier.
Described aviation case is provided with power amplifier access interface, described power amplifier access interface is connected with described audio frequency apparatus and described video equipment respectively.This structure is after power amplifier occurs that short trouble is cut-off, and audio frequency apparatus is connected with outside power amplifier by power amplifier access interface with video equipment, thus ensures the normal work of audio frequency apparatus and video equipment.
The bottom of described aviation case is provided with multiple shock absorbing mechanism, described shock absorbing mechanism comprises fixed head, foot pad and elastic mechanism, described fixed head is arranged on described aviation case bottom, described foot pad is positioned at the below of described fixed head, the upper end of described foot pad is provided with cavity, one end of described elastic mechanism is connected with described fixed head, the other end of described elastic mechanism stretches in described cavity and is connected with the bottom of described cavity, and described foot pad is fixedly connected with described fixed head.This structure is in aviation case moving process, and elastic mechanism absorbs the mobile vibrations produced, and aviation case can not produce strenuous vibration thus, and the equipment in aviation case is protected.
Described elastic mechanism comprises n spring, the center of described cavity is provided with threaded rod, the center of described fixed head is provided with the screwed hole mated with described threaded rod, described fixed head is provided with Yan Yiquan and is arranged in n location hole outside described screwed hole, one end one_to_one corresponding of n spring withstands in n location hole, the other end of n spring withstands on the bottom of described cavity, described threaded rod is connected with described screwed hole, described foot pad is by a described n spring-compressed, there is between described foot pad and described fixed head one end distance, wherein, n >=4.This structure can change spring according to the weight of aviation case, and the size of adjustment spring, ensures damping effect.
The outside of described foot pad is arranged with rubber sleeve; Be provided with a circle in described cavity and be arranged in n spring holder outside described threaded rod, n spring one_to_one corresponding is set on n spring holder.This structure improves damping effect further, ensures stability and the reliability of spring.
Described aviation case comprises multiple casing stacked from top to bottom, be fixedly connected with by multiple knocker between two adjacent layer box bodies, multiple rubber blanket is provided with between the casing of last layer and the casing of lower one deck, multiple rubber blanket is fixed on the bottom of the casing of last layer, the top of the casing of lower one deck is provided with multiple installing hole, and multiple rubber blanket one_to_one corresponding is contained in multiple installing hole.This structure improves damping effect further.
The side on described aviation case top is provided with opening, described opening part is provided with described closure of openings and the side plate opened, the inner side of described side plate is provided with installing rack, described installing rack is installed with projecting apparatus, when described side plate is by described closure of openings, described projecting apparatus is positioned at described aviation case.This structure controls side plate by the 3rd atmospheric pressure pole, and easy to operate basis ensures the stability of side plate.
Described installing rack comprises the first supporting plate, second supporting plate, first supporting bracket and the second supporting bracket, the first described supporting bracket and the second described supporting bracket are between the first described supporting plate and the second described supporting plate, the first described supporting bracket and the second described supporting bracket interval are fixed on the first described supporting plate, the bottom of the second described supporting plate is fixedly installed the bracket stretched between the first described supporting bracket and the second described supporting bracket, the front portion of described bracket, the front portion of the first described supporting bracket and the front portion of the second described supporting bracket are by a pinned connection, the front portion of the first described supporting bracket and the front portion of the second described supporting bracket are respectively arranged with the vertical axis hole extended, described bearing pin is positioned at described axis hole, one end of described bearing pin is provided with adjusting knob, described rear bracket part, the rear portion of the first described supporting bracket is coaxially connected with the rear portion of the second described supporting bracket, described projecting apparatus is arranged on the second described supporting plate.This structure adjusts the position of bearing pin by adjusting knob, freely can change the projection angle of projecting apparatus.
Described side plate and described aviation case are connected through the hinge, the first atmospheric pressure pole is provided with between described side plate and described aviation case, one end of the first described atmospheric pressure pole is connected with described side plate, and the other end of the first described atmospheric pressure pole is connected with described aviation case.
Compared with prior art; the utility model has the advantage of and to be connected with the power end of power amplifier and the output of power amplifier respectively by arranging short-circuit protection circuit; the power end of power amplifier accesses external power source by short-circuit protection circuit; the output whether short circuit when the output short circuit of power amplifier external power source is cut off of short-circuit protection circuit for detecting power amplifier; thus after the short circuit of power amplifier output; power amplifier can cut off with external power source at once, and audio frequency apparatus and video equipment can not be caused to damage.
Accompanying drawing explanation
Fig. 1 is theory diagram of the present utility model;
Fig. 2 is the circuit diagram of short-circuit protection circuit of the present utility model;
Fig. 3 is structure chart one of the present utility model;
Fig. 4 is structure chart two of the present utility model;
Fig. 5 is end view of the present utility model;
Fig. 6 is the explosive view of elastic mechanism of the present utility model;
Fig. 7 is the stereogram of elastic mechanism of the present utility model;
Fig. 8 is the stereogram of installing rack of the present utility model.
Embodiment
Below in conjunction with accompanying drawing embodiment, the utility model is described in further detail.
Embodiment: as shown in Figure 1, a kind of audio-video frequency media centring system, comprise aviation case 1, audio frequency apparatus 2, video equipment 3 and power amplifier 4, audio frequency apparatus 2, video equipment 3 and power amplifier 4 are all placed in aviation case 1, audio frequency apparatus 2 is connected with power amplifier 4 respectively with video equipment 3, audio-video frequency media centring system also comprises short-circuit protection circuit 5, short-circuit protection circuit 5 is connected with the power end of power amplifier 4 and the output of power amplifier 4 respectively, the power end of power amplifier 4 accesses external power source by short-circuit protection circuit 5, the output whether short circuit when the output short circuit of power amplifier 4 external power source is cut off of short-circuit protection circuit 5 for detecting power amplifier 4.
As shown in Figure 2, in the present embodiment, short-circuit protection circuit 5 comprises the first resistance R1, second resistance R2, 3rd resistance R3, 4th resistance R4, 5th resistance R5, 6th resistance R6, 7th resistance R7, 8th resistance R8, 9th resistance R9, tenth resistance R10, 11 resistance R11, 12 resistance R12, first electric capacity C1, second electric capacity C2, 3rd electric capacity C3, 4th electric capacity C4, first triode Q1, second triode Q2, 3rd triode Q3, 4th triode Q4, 5th triode Q5, 6th triode Q6, 7th triode Q7, first diode D1, second diode D2, 3rd diode D3, K switch 1 and relay J 1, one end of first resistance R1 is the first input end of short-circuit protection circuit 5, one end of second resistance R2 is the second input of short-circuit protection circuit 5, the first input end of short-circuit protection circuit 5 is connected with the output of the second input with power amplifier 4, the other end of the first resistance R1, one end of 3rd resistance R3, one end of 4th resistance R4 is connected with the base stage of the first triode Q1, the other end of the 3rd resistance R3, the other end of the second resistance R2 is connected with the emitter of the first triode Q1, the other end of the 4th resistance R4 is connected with the positive pole of the first diode D1, the minus earth of the first diode D1, the collector electrode of the first triode Q1 is connected with the negative pole of the second diode D2, the positive pole of the second diode D2 is connected with one end of the 6th resistance R6, the other end of the 6th resistance R6, one end of 5th resistance R5, one end of first electric capacity C1 is connected with the base stage of the second triode Q2, the other end of the 5th resistance R5, the other end of the first electric capacity C1 is connected with the emitter of the second triode Q2 and its link access 24V voltage, and the collector electrode of the second triode Q2 is connected with one end of the 7th resistance R7, the other end of the 7th resistance R7, one end of second electric capacity C2, one end of 8th resistance R8 is connected the collector electrode of the 3rd triode Q3 with the base stage of the 3rd triode Q3, the collector electrode of the 4th triode Q4, the collector electrode of the 5th triode Q5, one end of tenth resistance R10, one end of 4th electric capacity C4, one end of 11 resistance R11, one end of 12 resistance R12 is connected with the collector electrode of the 6th triode Q6, the other end of the second electric capacity C2, the other end of the 8th resistance R8, the emitter of the 3rd triode Q3, the base stage of the 4th triode Q4, the emitter of the 5th triode Q5, one end of 3rd electric capacity C3, one end of 9th resistance R9, one end of K switch 1, the other end of the 4th electric capacity C4, the other end of the 12 resistance R12 is connected and its link ground connection with the emitter of the 7th triode Q7, the emitter of the 4th triode Q4, the base stage of the 5th triode Q5, the other end of the 3rd electric capacity C3 is connected with the other end of the 9th resistance R9, the other end of the tenth resistance R10 is connected with the other end of K switch 1, the other end of the 11 resistance R11, the negative pole of the 3rd diode D3 is connected with the 4th pin of relay J 1, the positive pole of the 3rd diode D3, the collector electrode of the 6th triode Q6, the collector electrode of the 7th triode Q7 is connected with the 5th pin of relay J 1, the emitter of the 6th triode Q6 is connected with the base stage of the 7th triode Q7, 1st pin of relay J 1 is for accessing external power source, 3rd pin of relay J 1 is connected with the power end of power amplifier 4.
In the present embodiment, aviation case 1 is provided with power amplifier access interface, power amplifier access interface is connected with audio frequency apparatus 2 and video equipment 3 respectively.
As shown in Fig. 3 ~ 8, in the present embodiment, the bottom of aviation case 1 is provided with multiple shock absorbing mechanism 6, shock absorbing mechanism 6 comprises fixed head 61, foot pad 62 and elastic mechanism, and fixed head 61 is arranged on aviation case 1 bottom, and foot pad 62 is positioned at the below of fixed head 61, the upper end of foot pad 62 is provided with cavity 63, one end of elastic mechanism is connected with fixed head 61, and the other end of elastic mechanism stretches in cavity 63 and is connected with the bottom of cavity 63, and foot pad 62 is fixedly connected with fixed head 61.
In the present embodiment, elastic mechanism comprises 4 springs 64, the center of cavity 63 is provided with threaded rod 65, the center of fixed head 61 is provided with the screwed hole 66 mated with threaded rod 65, fixed head 61 is provided with Yan Yiquan and is arranged in 4 location holes 67 outside screwed hole 66, one end one_to_one corresponding of 4 springs 64 withstands in 4 location holes 67, the other end of 4 springs 64 withstands on the bottom of cavity 63, threaded rod 65 is connected with screwed hole 66,4 springs 64 compress by foot pad 62, have one end distance between foot pad 62 and fixed head 61.The outside of foot pad 62 is arranged with rubber sleeve 69; Be provided with 4 spring holders, 68,4 spring 64 one_to_one corresponding that a circle is arranged in outside threaded rod 65 in cavity 63 to be set on 4 spring holders 68.
In the present embodiment, aviation case 1 comprises multiple casing 11 stacked from top to bottom, be fixedly connected with by multiple knocker 12 between two adjacent layer box bodies 11, multiple rubber blanket 13 is provided with between the casing 11 of last layer and the casing 11 of lower one deck, multiple rubber blanket 13 is fixed on the bottom of the casing 11 of last layer, the top of the casing 11 of lower one deck is provided with multiple installing hole, and multiple rubber blanket 13 one_to_one corresponding is contained in multiple installing hole.
In the present embodiment, the side on aviation case 1 top is provided with opening 14, and opening 14 place is provided with the side plate 15 that opening 14 is closed and opened, the inner side of side plate 15 is provided with installing rack 7, installing rack 7 is installed with projecting apparatus 8, when opening 14 is closed by side plate 15, projecting apparatus 8 is positioned at aviation case 1.Installing rack 7 comprises the first supporting plate 71, second supporting plate 72, first supporting bracket 73 and the second supporting bracket 74, first supporting bracket 73 and the second supporting bracket 74 are between the first supporting plate 71 and the second supporting plate 72, first supporting bracket 73 and the second supporting bracket 74 interval are fixed on the first supporting plate 71, the bottom of the second supporting plate 72 is fixedly installed the bracket 75 stretched between the first supporting bracket 73 and the second supporting bracket 74, the front portion of bracket 75, the front portion of the first supporting bracket 73 is connected by a bearing pin 76 with the front portion of the second supporting bracket 74, the front portion of the first supporting bracket 73 and the front portion of the second supporting bracket 74 are respectively arranged with the vertical axis hole 77 extended, bearing pin 76 is positioned at axis hole 77, one end of bearing pin 76 is provided with adjusting knob 78, bracket 75 rear portion, the rear portion of the first supporting bracket 73 is coaxially connected with the rear portion of the second supporting bracket 74, projecting apparatus 8 is arranged on the second supporting plate 72.Side plate 15 and aviation case 1 main body are connected through the hinge, and the one end being provided with the first atmospheric pressure pole 9, first atmospheric pressure pole 9 between side plate 15 and aviation case 1 is connected with side plate 15, and the other end of the first atmospheric pressure pole 9 is connected with aviation case 1.
Claims (10)
1. an audio-video frequency media centring system, comprise aviation case, audio frequency apparatus, video equipment and power amplifier, described audio frequency apparatus, described video equipment and described power amplifier are all placed in aviation case, described audio frequency apparatus is connected with described power amplifier respectively with described video equipment, it is characterized in that described audio-video frequency media centring system also comprises short-circuit protection circuit, described short-circuit protection circuit is connected with the power end of described power amplifier and the output of described power amplifier respectively, the power end of described power amplifier is by described short-circuit protection circuit access external power source, the output whether short circuit when the output short circuit of described power amplifier external power source is cut off of described short-circuit protection circuit for detecting described power amplifier.
2. a kind of audio-video frequency media centring system according to claim 1, it is characterized in that described short-circuit protection circuit comprises the first resistance, second resistance, 3rd resistance, 4th resistance, 5th resistance, 6th resistance, 7th resistance, 8th resistance, 9th resistance, tenth resistance, 11 resistance, 12 resistance, first electric capacity, second electric capacity, 3rd electric capacity, 4th electric capacity, first triode, second triode, 3rd triode, 4th triode, 5th triode, 6th triode, 7th triode, first diode, second diode, 3rd diode, switch and relay,
One end of the first described resistance is the first input end of described short-circuit protection circuit, one end of the second described resistance is the second input of described short-circuit protection circuit, the first input end of described short-circuit protection circuit is connected with the output of the second input with described power amplifier, the other end of the first described resistance, one end of the 3rd described resistance, one end of the 4th described resistance is connected with the base stage of the first described triode, the other end of the 3rd described resistance, the other end of the second described resistance is connected with the emitter of the first described triode, the other end of the 4th described resistance is connected with the positive pole of the first described diode, the minus earth of the first described diode, the collector electrode of the first described triode is connected with the negative pole of the second described diode, the positive pole of the second described diode is connected with one end of the 6th described resistance, the other end of the 6th described resistance, one end of the 5th described resistance, one end of the first described electric capacity is connected with the base stage of the second described triode, the other end of the 5th described resistance, the other end of the first described electric capacity is connected with the emitter of the second described triode and its link access 24V voltage, and the collector electrode of the second described triode is connected with one end of the 7th described resistance, the other end of the 7th described resistance, one end of the second described electric capacity, the collector electrode of the 3rd triode described in one end of the 8th described resistance is connected with the base stage of the 3rd described triode, the collector electrode of the 4th described triode, the collector electrode of the 5th described triode, one end of the tenth described resistance, one end of the 4th described electric capacity, one end of the 11 described resistance, one end of the 12 described resistance is connected with the collector electrode of the 6th described triode, the other end of the second described electric capacity, the other end of the 8th described resistance, the emitter of the 3rd described triode, the base stage of the 4th described triode, the emitter of the 5th described triode, one end of the 3rd described electric capacity, one end of the 9th described resistance, one end of described switch, the other end of the 4th described electric capacity, the other end of the 12 described resistance is connected and its link ground connection with the emitter of the 7th described triode, the emitter of the 4th described triode, the base stage of the 5th described triode, the other end of the 3rd described electric capacity is connected with the other end of the 9th described resistance, the other end of the tenth described resistance is connected with the other end of described switch, the other end of the 11 described resistance, the negative pole of the 3rd described diode is connected with the 4th pin of described relay, the positive pole of the 3rd described diode, the collector electrode of the 6th described triode, the collector electrode of the 7th described triode is connected with the 5th pin of described relay, the emitter of the 6th described triode is connected with the base stage of the 7th described triode, 1st pin of described relay is for accessing external power source, 3rd pin of described relay is connected with the power end of described power amplifier.
3. a kind of audio-video frequency media centring system according to claim 1, it is characterized in that described aviation case is provided with power amplifier access interface, described power amplifier access interface is connected with described audio frequency apparatus and described video equipment respectively.
4. a kind of audio-video frequency media centring system according to claim 1, it is characterized in that the bottom of described aviation case is provided with multiple shock absorbing mechanism, described shock absorbing mechanism comprises fixed head, foot pad and elastic mechanism, described fixed head is arranged on described aviation case bottom, described foot pad is positioned at the below of described fixed head, the upper end of described foot pad is provided with cavity, one end of described elastic mechanism is connected with described fixed head, the other end of described elastic mechanism stretches in described cavity and is connected with the bottom of described cavity, described foot pad is fixedly connected with described fixed head.
5. a kind of audio-video frequency media centring system according to claim 4, it is characterized in that described elastic mechanism comprises n spring, the center of described cavity is provided with threaded rod, the center of described fixed head is provided with the screwed hole mated with described threaded rod, described fixed head is provided with Yan Yiquan and is arranged in n location hole outside described screwed hole, one end one_to_one corresponding of n spring withstands in n location hole, the other end of n spring withstands on the bottom of described cavity, described threaded rod is connected with described screwed hole, described foot pad is by a described n spring-compressed, there is between described foot pad and described fixed head one end distance, wherein, n >=4.
6. a kind of audio-video frequency media centring system according to claim 5, is characterized in that the outside of described foot pad is arranged with rubber sleeve; Be provided with a circle in described cavity and be arranged in n spring holder outside described threaded rod, n spring one_to_one corresponding is set on n spring holder.
7. a kind of audio-video frequency media centring system according to claim 4, it is characterized in that described aviation case comprises multiple casing stacked from top to bottom, be fixedly connected with by multiple knocker between two adjacent layer box bodies, multiple rubber blanket is provided with between the casing of last layer and the casing of lower one deck, multiple rubber blanket is fixed on the bottom of the casing of last layer, the top of the casing of lower one deck is provided with multiple installing hole, and multiple rubber blanket one_to_one corresponding is contained in multiple installing hole.
8. a kind of audio-video frequency media centring system according to claim 1, it is characterized in that the side on described aviation case top is provided with opening, described opening part is provided with described closure of openings and the side plate opened, the inner side of described side plate is provided with installing rack, described installing rack is installed with projecting apparatus, when described side plate is by described closure of openings, described projecting apparatus is positioned at described aviation case.
9. a kind of audio-video frequency media centring system according to claim 8, it is characterized in that described installing rack comprises the first supporting plate, second supporting plate, first supporting bracket and the second supporting bracket, the first described supporting bracket and the second described supporting bracket are between the first described supporting plate and the second described supporting plate, the first described supporting bracket and the second described supporting bracket interval are fixed on the first described supporting plate, the bottom of the second described supporting plate is fixedly installed the bracket stretched between the first described supporting bracket and the second described supporting bracket, the front portion of described bracket, the front portion of the first described supporting bracket and the front portion of the second described supporting bracket are by a pinned connection, the front portion of the first described supporting bracket and the front portion of the second described supporting bracket are respectively arranged with the vertical axis hole extended, described bearing pin is positioned at described axis hole, one end of described bearing pin is provided with adjusting knob, described rear bracket part, the rear portion of the first described supporting bracket is coaxially connected with the rear portion of the second described supporting bracket, described projecting apparatus is arranged on the second described supporting plate.
10. a kind of audio-video frequency media centring system according to claim 8, it is characterized in that described side plate and described aviation case are connected through the hinge, the first atmospheric pressure pole is provided with between described side plate and described aviation case, one end of the first described atmospheric pressure pole is connected with described side plate, and the other end of the first described atmospheric pressure pole is connected with described aviation case.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520248593.3U CN204633320U (en) | 2015-04-22 | 2015-04-22 | A kind of audio-video frequency media centring system |
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| CN201520248593.3U CN204633320U (en) | 2015-04-22 | 2015-04-22 | A kind of audio-video frequency media centring system |
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| CN204633320U true CN204633320U (en) | 2015-09-09 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109599844A (en) * | 2018-11-19 | 2019-04-09 | 普联技术有限公司 | A kind of radio circuit guard method, device and antenna equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109599844A (en) * | 2018-11-19 | 2019-04-09 | 普联技术有限公司 | A kind of radio circuit guard method, device and antenna equipment |
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Granted publication date: 20150909 Termination date: 20170422 |