CN210609668U - Wireless surround 5.1 sound track echo wall sound system - Google Patents
Wireless surround 5.1 sound track echo wall sound system Download PDFInfo
- Publication number
- CN210609668U CN210609668U CN201921909367.XU CN201921909367U CN210609668U CN 210609668 U CN210609668 U CN 210609668U CN 201921909367 U CN201921909367 U CN 201921909367U CN 210609668 U CN210609668 U CN 210609668U
- Authority
- CN
- China
- Prior art keywords
- sound
- channel
- shell
- echo wall
- surround
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000004891 communication Methods 0.000 claims abstract description 21
- 230000001154 acute effect Effects 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 13
- 238000010586 diagram Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
Images
Landscapes
- Circuit For Audible Band Transducer (AREA)
Abstract
The utility model discloses a wireless surround 5.1 sound track echo wall sound system, which comprises an echo wall sound box, a bass sound box and two surround sound boxes, wherein the echo wall sound box, the bass sound box and the two surround sound boxes are all in wireless communication connection; the sound box with the echo wall comprises a middle shell, a left shell and a right shell; the left side shell slides towards the direction close to or far away from the middle shell, and the right side shell slides towards the direction close to or far away from the middle shell, so that the distance between the left channel loudspeaker and the right channel loudspeaker can be adjusted. The utility model discloses technical scheme realizes the effect of encircleing of 5.1 sound channels through echo wall audio amplifier, bass audio amplifier and two encircles audio amplifier wireless communication connection, and the distance between left sound channel loudspeaker and the right sound channel loudspeaker is adjustable simultaneously to realized reaching the position that can adjust left sound channel loudspeaker and right sound channel loudspeaker according to the demand that the user is different or the distance between user and the box, in order to reach better sound encircleing effect.
Description
Technical Field
The utility model relates to a video-audio playing technology field, in particular to wireless 5.1 sound track echo wall sound system that encircles.
Background
The sound equipment is a common household appliance in daily life of people, and along with the improvement of the living standard of people, the demand on the aspect of cultural entertainment is increased day by day. The hall of placing home theater needs bigger space mostly, if dispose one set of ordinary split type 5.1 sound track's home theater (2 audio amplifier about leading, put 1 audio amplifier in, 2 audio amplifiers about the surround sound, subwoofer 1), can occupy bigger space, among the correlation technique, be with leading about two audio amplifiers and the set of middle audio amplifier become an echo wall audio amplifier, but the position of controlling loudspeaker and middle loudspeaker in present echo wall audio amplifier is fixed, can't satisfy different space distance and different users ' demand.
The above is only for the purpose of assisting understanding of the technical solutions of the present application, and does not represent an admission that the above is prior art.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a wireless 5.1 sound track echo wall sound system that encircles aims at solving the problem of the fixed position of each loudspeaker in the echo wall sound box to satisfy different users' demand.
In order to achieve the above object, the wireless surround 5.1 sound track echo wall sound system provided by the utility model comprises an echo wall sound box, a bass sound box and two surround sound boxes, wherein the echo wall sound box, the bass sound box and the two surround sound boxes are all in wireless communication connection; wherein the whispering gallery speaker comprises:
the box body is of a long-strip horizontal structure; the box body comprises a middle shell positioned in the middle, and a left side shell and a right side shell which are respectively arranged at two sides of the middle shell, wherein the left side shell is connected with the middle shell in a sliding manner, and the right side shell is connected with the middle shell in a sliding manner;
the middle horn is positioned in the middle shell;
a left channel horn positioned within the left side housing; and
a right channel horn located within the right side housing;
the left side casing is towards being close to or keeping away from the direction of middle casing slides, the right side casing is towards being close to or keeping away from the direction of middle casing slides to adjust the left channel loudspeaker with the distance between the right channel loudspeaker.
In an embodiment of the present invention, the left channel speaker is located on a front panel of the left side housing; the right channel speaker is located on a front panel of the right side housing.
In an embodiment of the present invention, the left side housing has a left side wall far away from the middle housing, the right side housing has a right side wall far away from the middle housing, the left side wall and the right side wall are symmetrically arranged and are all arranged at an acute angle with the back plate of the box body; the left sound channel loudspeaker are arranged on the left side wall, and the right sound channel loudspeaker are arranged on the right side wall.
In an embodiment of the present invention, an included angle between the left sidewall and the back plate of the box body ranges from 30 ° to 60 °; the included angle between the right side wall and the back plate of the box body ranges from 30 degrees to 60 degrees.
In an embodiment of the present invention, the sound box with a sound wall has a slide rail fixedly connected to the middle housing, and the slide rail extends toward two sides away from the middle housing; the left side casing and the right side casing can both move along the slide rail.
In an embodiment of the present invention, the left channel speaker includes a left channel tweeter and a left channel woofer; the right channel speaker comprises a right channel tweeter and a right channel woofer; the left channel woofer with the right channel woofer is located the left channel tweeter with between the right channel tweeter.
In an embodiment of the present invention, the middle housing includes an upper chamber and a lower chamber, and the echo wall sound system further includes a power amplifier module, and the power amplifier module and the center speaker are separately disposed in the upper chamber and the lower chamber; the power amplifier module is connected with the left sound channel loudspeaker, the right sound channel loudspeaker and the middle loudspeaker through audio cables respectively.
The utility model discloses an embodiment, the front of middle casing is equipped with control panel, and the back is equipped with a plurality of audio communication interfaces and power source, control panel with communication interface all corresponds the power amplifier module sets up.
In an embodiment of the present invention, the control panel includes a display screen and a key.
The utility model discloses technical scheme passes through the echo wall audio amplifier, bass audio amplifier and two surround the effect of encircleing of audio amplifier wireless communication connection realization 5.1 sound channel, set up middle casing and divide left side casing and the right side casing of establishing in middle casing both sides in the box of echo wall audio amplifier, put loudspeaker in the middle casing, be equipped with left sound channel loudspeaker in the left side casing, be equipped with right sound channel loudspeaker in the right side casing, left side casing and middle casing sliding connection, right side casing and middle casing sliding connection, make distance between left sound channel loudspeaker and the right sound channel loudspeaker adjustable, thereby realized reaching and to adjust the position of left sound channel loudspeaker and right sound channel loudspeaker according to the demand that the user is different or the distance between user and the box, in order to reach better sound encircleing the effect.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic structural view of an embodiment of the echo wall sound box of the present invention;
FIG. 2 is a schematic structural diagram of the embodiment of FIG. 1 after the left and right housings are slid open;
fig. 3 is a schematic structural view of another embodiment of the echo wall speaker of the present invention;
FIG. 4 is a schematic structural diagram of the embodiment of FIG. 3 after the left and right housings are slid open;
fig. 5 is a schematic structural diagram of the wireless surround 5.1 sound track echo wall sound system of the present invention.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 100 | Echo |
110 | |
| 111 | |
112 | |
| 113 | |
114 | |
| 115 | |
116 | |
| 120 | |
130 | Left |
| 131 | Left sound channel |
132 | |
| 140 | |
141 | Right sound channel |
| 142 | |
150 | |
| 160 | |
170 | |
| 180 | |
200 | |
| 300 | Surround sound box |
The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that, if directional indications (such as upper, lower, left, right, front and rear … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
The utility model provides a wireless 5.1 sound track echo wall sound system that encircles.
In the embodiment of the present invention, as shown in fig. 1 to 5, the wireless surround 5.1 sound channel echo wall sound system includes an echo wall sound box 100, a bass sound box 200 and two surround sound boxes 300, wherein the echo wall sound box 100, the bass sound box 200 and the two surround sound boxes 300 are all in wireless communication connection; wherein the echo wall speaker 100 includes:
the box body 110, the box body 100 is in a long-strip horizontal structure; the box body 110 comprises a middle shell 111 positioned in the middle, and a left shell 112 and a right shell 113 respectively arranged at two sides of the middle shell 111, wherein the left shell 112 is connected with the middle shell 111 in a sliding manner, and the right shell 113 is connected with the middle shell 111 in a sliding manner;
a center horn 120, wherein the center horn 120 is positioned in the middle shell 111;
a left channel speaker 130, the left channel speaker 130 being located within the left side housing 112; and
a right channel speaker 140, the right channel speaker 140 being located within the right side housing 113;
the left side case 112 slides in a direction approaching or separating from the middle case 111, and the right side case 113 slides in a direction approaching or separating from the middle case 111, so as to adjust the distance between the left channel speaker 130 and the right channel speaker 140.
The echo wall speaker 100 is provided with a center speaker 120, a left channel speaker 130 and a right channel speaker 140, so that the echo wall speaker 100, the bass speaker 200 and the two surround speakers 300 can be combined together to form a complete 5.1 channel surround sound system. In the practical application process, with echo wall audio amplifier 100 setting below the TV set, two surround sound box 300 settings are regional behind one's back at user's position, bass speaker 200 sets up the side below at the TV set, can realize opening the TV set at home and just can enjoy the surround sound effect of cinema, and owing to be wireless communication connection, avoided the mixed and disorderly phenomenon of many connecting wires.
In an embodiment of the present invention, the bass sound box 200, two surround the sound box 300 and the echo wall sound box 100 is connected through wireless network communication, bluetooth communication or infrared communication.
The cabinet 110 is provided with a left casing 112, a middle casing 111 and a right casing 113, which are respectively provided with a left channel speaker 130, a middle speaker 120 and a right channel speaker 140, so that the speakers in the three spaces do not interfere with each other inside the cabinet 110. The left housing 112 is slidably connected to the middle housing 111 such that the left housing 112 can slide toward or away from the middle housing 111, thereby adjusting the distance between the left channel speaker 130 and the center speaker 120; similarly, the right side casing 113 is connected with the middle casing 111 in a sliding manner, so that the right side casing 112 can slide towards the direction close to or far away from the middle casing 111, so that the distance between the right channel speaker 130 and the middle speaker 120 can be adjusted, so that the adjustment of the distance between the left channel speaker 130 and the right channel speaker 140 can be realized, and then the positions of the left channel speaker 130 and the right channel speaker 140 can be adjusted according to different requirements of users or the distance between the users and the box body 110, so as to achieve a better surround sound effect.
It is understood that the sliding connection between the left housing 112 and the middle housing 111 can be determined according to the actual situation, such as a slide-and-block combination or a screw transmission. Similarly, the sliding connection between the right housing 113 and the middle housing 111 may also be a sliding rail-sliding block combination or a screw transmission. In practical applications, the center speaker 120 is located right in front of the user, the left channel speaker 130 and the right channel speaker 140 are respectively disposed on the left and right sides of the front of the user, and the left channel speaker 130 and the right channel speaker 140 are preferably symmetrically disposed in consideration of the surround effect of the sound effect.
The utility model discloses technical scheme passes through echo wall audio amplifier 100, bass audio amplifier 200 and two surround the effect of encircleing of audio amplifier 300 wireless communication connection realization 5.1 sound track, set up middle casing 111 and set up left side casing 112 and the right side casing 113 in middle casing 111 both sides in box 110 of echo wall audio amplifier 100, put loudspeaker 120 in the middle casing 111 is equipped with, be equipped with left channel loudspeaker 130 in the left side casing 112, be equipped with right channel loudspeaker 140 in the right side casing 113, left side casing 112 and middle casing 111 sliding connection, right side casing 113 and middle casing 111 sliding connection, make the distance between left channel loudspeaker 130 and the right channel loudspeaker 140 adjustable, thereby realized reaching and to adjust the position of left channel loudspeaker 130 and right channel loudspeaker 140 according to the demand that the user is different or the distance between user and the box 110, in order to reach better sound encircleing effect.
Further, in order to make the enclosure effect better, the left channel speaker 130 and the right channel speaker 140 may be disposed on the front or the side of the cabinet 110, and the specific positions may be determined according to the actual situation:
in an embodiment of the present invention, referring to fig. 3 and 4, the left channel speaker 130 is located on a front panel (not shown) of the left casing 112; the right channel speaker 140 is located on the front panel of the right side case 113; the left channel speaker 130 is disposed symmetrically to the right channel speaker 140. The left channel speaker 130 and the right channel speaker 140 are located at the front of the cabinet 110, and the distance between the left channel speaker 130 and the right channel speaker 140 is adjusted by sliding the left casing 112 and the right casing 113, so that the sound of the left channel speaker 130 and the right channel speaker 140 can surround the sound emitted from the center speaker 120.
In an embodiment of the present invention, referring to fig. 1 and 2, the left side casing 112 has a left side wall (not shown) far away from the middle casing 111, the right side casing 113 has a right side wall (not shown) far away from the middle casing 111, the left side wall and the right side wall are symmetrically disposed and are disposed at an acute angle with the back plate of the box body 110; the left channel speaker 130 is located on the left side wall of the left side housing 112, and the right channel speaker 140 is located on the right side wall of the right side housing 113. Left channel loudspeaker 130 and right channel loudspeaker 140 set up on the relative both sides wall of box 110 this moment respectively, the accessible slides left side casing 112 and right side casing 113 respectively, with the distance of adjusting left channel loudspeaker 130 and right channel loudspeaker 140, and simultaneously, the left side wall is the symmetry setting with the right side wall, and be acute angle setting with the backplate of box 110, make the sound that left channel loudspeaker 130 and right channel loudspeaker 140 sent out can extend towards both sides, the sound that sends out is more had the third dimension, and then make and the sound that middle loudspeaker 120 sent form better encirclement effect.
Furthermore, the included angle between the left side wall and the back plate of the box body 110 ranges from 30 degrees to 60 degrees; the included angle between the right side wall and the back plate of the box body 110 ranges from 30 degrees to 60 degrees. The specific angle can be determined according to the actual situation, for example, the angle between the left sidewall and the back plate of the box body 110 can be 30 °, 45 ° or 60 °; the angle between the right side wall and the back plate of the case 110 may be 30 °, 45 °, 60 °, or the like.
Further, referring to fig. 1 to 4, the echo wall sound box 100 has a slide rail 116 fixedly connected to the middle housing 111, and the slide rail 116 extends towards two sides away from the middle housing 111; both the left housing 112 and the right housing 113 are movable along the slide rail 116. The slide rail 116 mainly plays a role of guiding so that the left housing 112 and the right housing 113 are more stable during sliding.
In an embodiment of the present invention, referring to fig. 1 to 4, in order to make the sound effect of the echo wall sound box 100 better, the left channel speaker 130 includes a left channel tweeter 131 and a left channel woofer 132, the left channel tweeter 131 is disposed obliquely above the left channel woofer 132; the right channel speaker 140 includes a right channel tweeter 141 and a right channel woofer 142, and the right channel tweeter 141 is disposed obliquely above the right channel woofer 142.
Further, referring to fig. 1, the middle shell 111 includes an upper chamber 114 and a lower chamber 115, the echo wall sound system further includes a power amplifier module 150, and the power amplifier module 150 and the center speaker 120 are respectively disposed in the upper chamber 114 and the lower chamber 115; the power amplifier module 150 is connected to the left channel speaker 130, the right channel speaker 140, and the center speaker 120 through audio lines. Since the center speaker 120 can only emit mid-frequency sound, putting together a power amplifier that is not sealed will not affect the emitted mid-frequency sound. The power amplifier module 150 is connected to the left channel speaker 130, the right channel speaker 140 and the center speaker 120 through audio lines, so that the left channel speaker 130, the right channel speaker 140 and the center speaker 120 can make sound outwards smoothly.
In an embodiment of the present invention, referring to fig. 1, the front surface of the middle housing 111 is provided with a control panel 160, the back surface is provided with a plurality of audio communication interfaces 170 and a power interface 180, the control panel 160 and the communication interfaces 170 all correspond to the power amplifier module 150.
In an embodiment of the present invention, referring to fig. 1, the control panel 160 includes a display screen and keys to facilitate the adjustment of the echo wall speaker 100.
The above only is the preferred embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structure changes made by the contents of the specification and the drawings under the inventive concept of the present invention, or the direct/indirect application in other related technical fields are included in the patent protection scope of the present invention.
Claims (10)
1. A wireless surround 5.1 sound track echo wall sound system is characterized by comprising an echo wall sound box, a bass sound box and two surround sound boxes, wherein the echo wall sound box, the bass sound box and the two surround sound boxes are in wireless communication connection; wherein the whispering gallery speaker comprises:
the box body is of a long-strip horizontal structure; the box body comprises a middle shell positioned in the middle, and a left side shell and a right side shell which are respectively arranged at two sides of the middle shell, wherein the left side shell is connected with the middle shell in a sliding manner, and the right side shell is connected with the middle shell in a sliding manner;
the middle horn is positioned in the middle shell;
a left channel horn positioned within the left side housing; and
a right channel horn located within the right side housing;
the left side casing is towards being close to or keeping away from the direction of middle casing slides, the right side casing is towards being close to or keeping away from the direction of middle casing slides to adjust the left channel loudspeaker with the distance between the right channel loudspeaker.
2. The wireless surround 5.1 channel echo wall sound system of claim 1, wherein said left channel speaker is located on a front panel of said left side housing; the right channel speaker is located on a front panel of the right side housing.
3. The wireless surround 5.1 channel echo wall sound system of claim 1, wherein said left side shell has a left side wall remote from said center shell, said right side shell has a right side wall remote from said center shell, said left side wall and said right side wall are symmetrically disposed and are both disposed at an acute angle to a back plate of said cabinet; the left sound channel loudspeaker are arranged on the left side wall, and the right sound channel loudspeaker are arranged on the right side wall.
4. The wireless surround 5.1 channel echo wall sound system of claim 3, wherein the angle between the left side wall and the back plate of the cabinet is in the range of 30 ° to 60 °; the included angle between the right side wall and the back plate of the box body ranges from 30 degrees to 60 degrees.
5. The wireless surround 5.1 sound track echo wall sound system of claim 2 or 3, characterized in that, the echo wall sound box has a slide rail fixedly connected with the middle shell, the slide rail extends towards two sides far away from the middle shell; the left side casing and the right side casing can both move along the slide rail.
6. The wireless surround 5.1 channel echo wall sound system of any one of claims 1 to 3, wherein the left channel horn comprises a left channel tweeter and a left channel woofer; the right channel speaker comprises a right channel tweeter and a right channel woofer; the left channel woofer with the right channel woofer is located the left channel tweeter with between the right channel tweeter.
7. A wireless surround 5.1 channel echo wall sound system according to any of claims 1 to 3, wherein the woofer, two of the surround speakers and the echo wall speaker are connected by wireless network communication, bluetooth communication or infrared communication.
8. The wireless surround 5.1 channel echo wall sound system of any one of claims 1 to 3, wherein the middle housing includes an upper chamber and a lower chamber, the echo wall sound system further including a power amplifier module, the power amplifier module and the center horn being disposed in the upper chamber and the lower chamber, respectively; the power amplifier module is connected with the left sound channel loudspeaker, the right sound channel loudspeaker and the middle loudspeaker through audio cables respectively.
9. The wireless surround 5.1 sound track echo wall sound system of claim 8, wherein the front of the middle shell is provided with a control panel, the back is provided with a plurality of audio communication interfaces and power interfaces, and the control panel and the communication interfaces are both arranged corresponding to the power amplifier module.
10. The wireless surround 5.1 channel echo wall sound system of claim 9, wherein said control panel includes a display and keys.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921909367.XU CN210609668U (en) | 2019-11-06 | 2019-11-06 | Wireless surround 5.1 sound track echo wall sound system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921909367.XU CN210609668U (en) | 2019-11-06 | 2019-11-06 | Wireless surround 5.1 sound track echo wall sound system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210609668U true CN210609668U (en) | 2020-05-22 |
Family
ID=70693743
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921909367.XU Expired - Fee Related CN210609668U (en) | 2019-11-06 | 2019-11-06 | Wireless surround 5.1 sound track echo wall sound system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210609668U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112637715A (en) * | 2020-12-31 | 2021-04-09 | 厦门市派对屋电子有限公司 | Multifunctional home audio-video system |
-
2019
- 2019-11-06 CN CN201921909367.XU patent/CN210609668U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112637715A (en) * | 2020-12-31 | 2021-04-09 | 厦门市派对屋电子有限公司 | Multifunctional home audio-video system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8073176B2 (en) | Speakerbar | |
| KR20150125584A (en) | Speaker apparatus | |
| CN212324354U (en) | Loudspeaker module and electronic equipment | |
| US5222145A (en) | Dual-chamber multi-channel speaker for surround sound stereo audio systems | |
| US6625289B1 (en) | Stereo loudspeaker system | |
| US20150049894A1 (en) | Low profile flat panel speaker system | |
| CN210609668U (en) | Wireless surround 5.1 sound track echo wall sound system | |
| CN203968354U (en) | Integrated multichannel audio | |
| CN213783544U (en) | Scalable video stereo with stereo scene | |
| US20140177883A1 (en) | Total Angle 360-Angled Loudspeaker Cabinet Enclosure Designing Technology | |
| CN210609662U (en) | Echo wall sound box and sound system | |
| WO2007033532A1 (en) | A sound box integrated multi-channel | |
| CN209982661U (en) | Strip-shaped sound box capable of adjusting sound effect | |
| CN217590944U (en) | Combined television surround stereo system | |
| CN205142428U (en) | Multi -functional audio -visual system of integration | |
| US10735860B2 (en) | Soundbar | |
| CN212259321U (en) | Omnibearing multifunctional home cinema sound box combination | |
| CN216313393U (en) | KTV sound system based on subwoofer | |
| CN210518704U (en) | Novel portable stereo set of two bass big guns that has high pitch airtight box | |
| CN200941684Y (en) | Systemic acoustics | |
| CN219812252U (en) | Panoramic sound system | |
| CN217240846U (en) | Combined bar-shaped sound box | |
| CN214799866U (en) | Distributed loudspeaker box and distributed sound system | |
| Jiefeng et al. | Design of Audio system for the 4K-UHD Studio of Communication University of China | |
| CN209767819U (en) | horn speaker of multicavity intercommunication |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200522 |