CN114040306B - Active heat dissipation type loudspeaker - Google Patents
Active heat dissipation type loudspeaker Download PDFInfo
- Publication number
- CN114040306B CN114040306B CN202111307198.4A CN202111307198A CN114040306B CN 114040306 B CN114040306 B CN 114040306B CN 202111307198 A CN202111307198 A CN 202111307198A CN 114040306 B CN114040306 B CN 114040306B
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- Prior art keywords
- air
- flow
- unidirectional
- section
- air outlet
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/06—Loudspeakers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/02—Details
- H04R9/022—Cooling arrangements
Abstract
The invention belongs to the technical field of loudspeakers, and particularly relates to an active heat dissipation type loudspeaker. This initiative heat dissipation formula speaker includes: a speaker housing; a magnetic circuit assembly disposed in the speaker housing; the flow channel assembly is arranged in the loudspeaker shell, is communicated with the outside and is attached to the magnetic loop assembly; and the vibration component is arranged in the flow channel component and is in transmission connection with the magnetic circuit component so as to enable air in the flow channel component to flow out to the outside in a one-way mode through vibration. This initiative heat dissipation formula speaker heat dissipation produces air current can only one-way outflow to the external world to make the air of speaker depths also can discharge to the external world, be difficult for long-pending heat.
Description
Technical Field
The invention belongs to the technical field of loudspeakers, and particularly relates to an active heat dissipation type loudspeaker.
Background
The loudspeaker converts an electric signal into an acoustic signal, converts the input electric signal into mechanical motion of a magnet by means of a magnetic circuit component, and then transmits the mechanical motion of the magnet to a vibration component connected with the magnetic circuit component, and the vibration component produces sound under the action of air.
Can produce a large amount of heats when speaker vibration sound production, the speaker that dispels the heat is carried out to present usable vibration subassembly, and it mainly is the vibration through vibrating diaphragm in the vibration subassembly, makes the inside gas production of speaker flow, takes out the heat outside the speaker. In the heat dissipation scheme, the loudspeaker is generally connected with the outside only through one airflow channel, and the airflow channel is an air outlet and an air inlet, so that most of air entering and exiting each time is only air in and around the airflow channel, and the air in the deep part of the loudspeaker far away from the airflow channel is difficult to circulate, so that the heat dissipation is not uniform.
Disclosure of Invention
The invention aims to provide an active heat dissipation type loudspeaker, so that the heat dissipation inside the loudspeaker is more balanced.
In order to solve the above technical problem, the present invention provides an active heat dissipation type speaker, including: a speaker housing; a magnetic circuit assembly disposed in the speaker housing; the flow channel assembly is arranged in the loudspeaker shell, is communicated with the outside and is attached to the magnetic loop assembly; and the vibration component is arranged in the flow channel component and is in transmission connection with the magnetic circuit component so as to enable air in the flow channel component to flow out to the outside in a one-way mode through vibration.
Further, the runner assembly includes: the air source clapboard is arranged in the loudspeaker shell and is abutted against the inner wall of the loudspeaker shell to form an air source flow channel; and the plurality of unidirectional flow pipes are arranged in the loudspeaker shell, are attached to the magnetic loop assembly, extend out of the loudspeaker shell to be communicated with the outside, are communicated with the air source partition plate and are suitable for enabling air entering the unidirectional flow pipes to flow in a unidirectional mode.
Furthermore, a plurality of pairs of unidirectional flow pipe extension openings are formed in the loudspeaker shell; the unidirectional flow pipe includes: the loudspeaker comprises a heat exchange section, a one-way air inlet section and a one-way air outlet section, wherein the heat exchange section is positioned in a loudspeaker shell, and the one-way air inlet section and the one-way air outlet section are respectively communicated with one end of the heat exchange section; the heat exchange section is attached to the magnetic loop assembly, and is provided with an air source hole so as to be communicated with the air source flow passage; the one-way air inlet section and the one-way air outlet section respectively extend out of the loudspeaker shell through an extending port of the one-way flow pipe, so that outside air enters the heat exchange section and the air source flow passage through the one-way air inlet section, and air in the heat exchange section and the air source flow passage is exhausted through the one-way air outlet section.
Further, the unidirectional air intake section includes: the air inlet airflow partition plate is movably arranged in the one-way air inlet section, and the air inlet airflow partition ring and the air inlet partition plate stopper are positioned at two sides of the air inlet airflow partition plate and are fixedly connected with the one-way air inlet section; the air inlet flow spacer ring is positioned on one side close to an inlet of the one-way air inlet section; the air inlet baffle piece is positioned on one side far away from the inlet of the one-way air inlet section; the air inlet flow partition plate is suitable for being blown to the air inlet partition plate stopper by air flow during air inlet so that the air flow passes through a gap between the air inlet flow partition plate and the inner wall of the one-way air inlet section, and is suitable for being blown to and clinging to the air inlet flow partition ring by the air flow during air outlet so as to block the air inlet flow partition ring.
Further, the one-way air outlet section comprises: the air outlet baffle plate is movably arranged in the one-way air outlet section, and the air outlet flow spacer ring and the air outlet baffle plate stopper are positioned at two sides of the air outlet flow baffle plate and are fixedly connected with the one-way air outlet section; the air outlet flow spacer ring is positioned on one side of the air outlet far away from the unidirectional air outlet section; the air outlet baffle plate is positioned at one side close to the air outlet of the unidirectional air outlet section; the air outlet flow partition plate is suitable for being blown to the air outlet partition plate stopper by air flow during air outlet so as to enable the air flow to pass through a gap between the air outlet flow partition plate and the inner wall of the unidirectional air outlet section, and is suitable for being blown to and tightly attached to the air outlet flow spacer ring by the air flow during air inlet so as to block the air outlet flow spacer ring.
Further, adjacent ones of the unidirectional flow tubes are disposed upside down.
Further, the vibration assembly includes: the air isolating diaphragm is connected with the air source clapboard so as to form an air source space communicated with the air source flow channel; and the transmission part is used for connecting the magnetic loop assembly and the air isolating diaphragm so as to enable the air isolating diaphragm to vibrate, and air outlet and air inlet are formed in the air source space.
The active heat dissipation type loudspeaker has the advantages that the vibration component is driven by the magnetic loop component to generate vibration, airflow is generated in the flow channel component, the flow direction of the airflow is regulated and controlled by the flow channel component and only flows out to the outside in a single direction, so that air in the deep position of the loudspeaker can be discharged to the outside, and heat accumulation is not easy to occur.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic structural diagram of an active heat dissipation speaker according to the present invention;
FIG. 2 is a first cross-sectional view of the active cooling speaker of the present invention;
FIG. 3 is a second cross-sectional view of the active cooling speaker of the present invention;
FIG. 4 is a cross-sectional view of a speaker housing of the present invention;
FIG. 5 is a schematic view of a one-way flow tube according to the present invention;
fig. 6 is a cross-sectional view of the active cooling speaker of the present invention when it is inflated;
FIG. 7 is a cross-sectional view of the active cooling speaker of the present invention in the air vent;
in the figure:
a speaker housing 100, a unidirectional flow tube extension 110;
a magnetic circuit assembly 200;
the heat exchanger comprises a flow channel assembly 300, a gas source partition plate 310, a gas source flow channel 320, a one-way flow pipe 330, a heat exchange section 340, a one-way gas inlet section 350, a one-way gas outlet section 360, a gas source hole 341, a gas inlet flow partition plate 351, a gas inlet flow partition ring 352, a gas inlet partition plate stopper 353, a gas outlet flow partition plate 361, a gas outlet flow partition ring 362 and a gas outlet partition plate stopper 363;
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. All other embodiments based on the embodiments of the present invention, which can be realized by a person skilled in the art without any inventive step, are within the scope of the present invention.
Examples
As shown in fig. 1 and 2, the present invention provides an active heat dissipation type speaker, including: a speaker housing 100; a magnetic circuit assembly 200 disposed in the speaker housing 100; a flow channel assembly 300 disposed in the speaker housing 100, connected to the outside, and attached to the magnetic circuit assembly 200; and a vibration assembly 400 disposed in the flow channel assembly 300 and in transmission connection with the magnetic circuit assembly 200, so that air in the flow channel assembly 300 flows out to the outside in a single direction by vibration.
In the active heat dissipation speaker provided by the invention, the vibration component 400 is driven by the magnetic loop component 200 to generate vibration, airflow is generated in the flow channel component 300, the flow direction of the airflow is regulated and controlled by the flow channel component 300 and only flows out to the outside in a single direction, so that the air in the deep part of the speaker can be discharged to the outside, and heat accumulation is not easy to occur.
As shown in fig. 2, the flow channel assembly 300 may include: an air source partition plate 310, which is arranged in the loudspeaker housing 100 and is abutted against the inner wall of the loudspeaker housing 100 to form an air source flow channel 320; and a plurality of unidirectional flow tubes 330 disposed in the speaker housing 100, attached to the magnetic circuit assembly 200, extending to the outside of the speaker housing 100 to communicate with the outside, and communicating with the air source partition 310, and adapted to allow unidirectional flow of air entering the unidirectional flow tubes 330. In this embodiment, referring to fig. 2 and fig. 3, the air source partition plate 310 is two L-shaped plates, which are respectively abutted against the inner wall of the speaker housing 100 to form an upper air source flow channel 320 and a lower air source flow channel 320; in this embodiment, four unidirectional flow tubes 330 are provided, all of which are attached to the magnetic circuit assembly 200 for sufficient heat exchange; the magnetic circuit assembly 200 may be directly a speaker magnetic circuit module, which is a conventional technology.
As shown in fig. 4, the speaker housing 100 may be formed with a plurality of pairs of unidirectional flow tube extension openings 110;
as shown in fig. 5, the unidirectional flow pipe 330 may include: a heat exchange section 340 located in the speaker housing 100, and a unidirectional air inlet section 350 and a unidirectional air outlet section 360 respectively communicated with one end of the heat exchange section 340; wherein, the heat exchange segment 340 is attached to the magnetic circuit assembly 200, and is provided with an air source hole 341 to communicate with the air source flow channel 320; as shown in fig. 2 and 3, the unidirectional air inlet section 350 and the unidirectional air outlet section 360 respectively extend out of the speaker housing 100 through a unidirectional flow pipe extension port 110, so that the external air enters the heat exchange section 340 and the air source flow passage 320 through the unidirectional air inlet section 350, and the air in the heat exchange section 340 and the air source flow passage 320 is exhausted through the unidirectional air outlet section 360.
As shown in fig. 2 and 5, the unidirectional intake section 350 may include: the air inlet flow partition plate 351 is movably arranged in the one-way air inlet section 350, and the air inlet flow partition ring 352 and the air inlet partition plate stopper 353 are positioned at two sides of the air inlet flow partition plate 351, and the air inlet flow partition ring 352 and the air inlet partition plate stopper 353 are fixedly connected with the one-way air inlet section 350; wherein the inlet airflow spacer 352 is located at a side close to the inlet of the unidirectional inlet section 350; the intake baffle 353 is located on a side away from the inlet of the unidirectional intake section 350; the inlet airflow baffle 351 is suitable for being blown onto the inlet baffle 353 by airflow during air inlet so as to enable the airflow to pass through a gap between the inlet airflow baffle 351 and the inner wall of the unidirectional air inlet section 350, and suitable for being blown onto and tightly attached to the inlet airflow spacer 352 during air outlet so as to block the inlet airflow spacer 352.
As shown in fig. 2 and 5, the unidirectional air outlet segment 360 may include: an outlet airflow partition 361 movably arranged in the unidirectional outlet section 360, and an outlet airflow spacer ring 362 and an outlet partition stopper 363 which are positioned at two sides of the outlet airflow partition 361, wherein the outlet airflow spacer ring 362 and the outlet partition stopper 363 are fixedly connected with the unidirectional outlet section 360; wherein the outlet gas flow spacer 362 is located at the side far away from the outlet of the unidirectional outlet section 360; the air outlet baffle 363 is located at the side close to the air outlet of the unidirectional air outlet section 360; the outlet airflow partition 361 is adapted to be blown onto the outlet partition stopper 363 by the airflow during the outlet process, so that the airflow passes through the gap between the outlet airflow partition 361 and the inner wall of the unidirectional outlet section 360, and is further adapted to be blown onto and tightly attached to the outlet airflow spacer 362 by the airflow during the inlet process, so as to block the outlet airflow spacer 362.
Fig. 6 is a cross-sectional view of the active heat dissipation speaker during air intake, when the vibration assembly 400 retracts to the left, the air in the external, heat exchange segment 340 and the air supply channel 320 is sucked to the air supply space 420, at this time, referring to fig. 2, the air outlet flow partition 361 in the unidirectional air outlet segment 360 is pushed by the external air flow and clings to the air outlet flow partition 362, the unidirectional air outlet segment 360 is closed, the air inlet flow partition 351 in the unidirectional air inlet segment 350 is pushed by the external air flow and clings to the air inlet partition 353, the air flow can pass through the gap between the air inlet flow partition 351 and the inner wall of the unidirectional air inlet segment 350, the air flow direction is as shown in fig. 6, in this embodiment, the volume of the air supply space 420 is greater than the sum of the volume of the heat exchange segment 340 and the volume of the air supply channel 320, so as to fully suck the heat-carrying air in the heat exchange segment 340 and the air supply channel 320, and especially reduce the air retention in the heat exchange segment 340.
Fig. 7 is a cross-sectional view of the active heat dissipation speaker during air outlet, when the vibration assembly 400 extends rightward, the mixture of the ambient air sucked during air inlet, the air in the heat exchange section 340 and the air in the air source channel 320 is extruded out of the air source space 420, and similarly, the air outlet flow partition 361 in the unidirectional air outlet section 360 is pushed by the air flow and tightly adheres to the air outlet partition 363, the air flow can pass through the gap between the air outlet flow partition 361 and the inner wall of the unidirectional air outlet section 360 and is exhausted to the outside, the air inlet flow partition 351 in the unidirectional air inlet section 350 is pushed by the air flow and tightly adheres to the air inlet flow partition ring 352, the unidirectional air inlet section 350 is closed, the air flow extruded from the air source space 420 flows as shown in fig. 7, because the volume of the air source space 420 is greater than the sum of the volume of the heat exchange section 340 and the volume of the air source channel 320, the air in the heat exchange section 340 and the air source channel 320 can be fully cleaned, and the temperature inside of the speaker can be reduced. Meanwhile, air flows only in the unidirectional flow pipe 330, the air source flow passage 320 and the air source space 420, and does not contact the magnetic circuit assembly 200, thereby preventing oxidation and moisture of the magnetic circuit assembly 200.
As shown in fig. 2, the adjacent unidirectional flow tubes 330 may be arranged upside down, and as described above, the unidirectional air outlet section 360 is closed when air is supplied, and at this time, flowing air is present at the unidirectional air inlet section 350, which can transmit sound, and thus is a sound outlet; when air is discharged, the one-way air inlet section 350 is closed, and the one-way air outlet section 360 is provided with flowing air which can transmit sound, so that the one-way air inlet section is a sound producing port; the adjacent unidirectional flow tubes 330 may be arranged upside down, and when air is introduced or discharged, sound emitting ports may be formed on both sides of the speaker housing 100, so as to prevent the sound from suddenly rising on one side and suddenly falling on the other side.
In this embodiment, the vibration assembly 400 may include: an air separation diaphragm 410 connected to the air source partition plate 310 to form an air source space 420 communicated with the air source flow passage 320; and a transmission member 430 for connecting the magnetic circuit assembly 200 and the air-isolating diaphragm 410 to vibrate the air-isolating diaphragm 410, so as to form air outlet and air inlet in the air source space 420.
In summary, according to the active heat dissipation speaker provided by the invention, the vibration component is driven by the magnetic loop component to generate vibration, an air flow is generated in the flow channel component, the flow direction of the air flow is regulated and controlled by the flow channel component, the air flow flows out to the outside in a single direction, air far away from the air outlet in the depth of the speaker can be exhausted, and the speaker is not easy to accumulate heat.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
In light of the foregoing description of the preferred embodiments of the present invention, it is to be understood that various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (6)
1. An active heat dissipation speaker, comprising:
a speaker housing (100);
a magnetic circuit assembly (200) disposed in the speaker enclosure (100);
a flow channel assembly (300) which is arranged in the loudspeaker shell (100), is communicated with the outside and is attached to the magnetic circuit assembly (200);
the vibration assembly (400) is arranged in the flow channel assembly (300) and is in transmission connection with the magnetic circuit assembly (200) so as to enable air in the flow channel assembly (300) to flow out to the outside in a single direction through vibration;
the flow channel assembly (300) comprises:
an air source baffle plate (310) which is arranged in the loudspeaker shell (100) and is abutted with the inner wall of the loudspeaker shell (100) to form an air source flow channel (320);
and the plurality of unidirectional flow pipes (330) are arranged in the loudspeaker shell (100), are attached to the magnetic loop assembly (200), extend out of the loudspeaker shell (100) to be communicated with the outside, are communicated with the air source partition plate (310), and are suitable for enabling air entering the unidirectional flow pipes (330) to flow in a unidirectional mode.
2. The active cooling speaker of claim 1,
a plurality of pairs of unidirectional flow pipe extension openings (110) are formed in the loudspeaker shell (100);
the unidirectional flow tube (330) comprises:
a heat exchange section (340) positioned in the loudspeaker shell (100), and a unidirectional air inlet section (350) and a unidirectional air outlet section (360) which are respectively communicated with one end of the heat exchange section (340); wherein the content of the first and second substances,
the heat exchange section (340) is attached to the magnetic circuit assembly (200) and is provided with an air source hole (341) so as to be communicated with the air source flow passage (320);
the unidirectional air inlet section (350) and the unidirectional air outlet section (360) respectively extend out of the loudspeaker shell (100) through a unidirectional flow pipe extending port (110), so that outside air enters the heat exchange section (340) and the air source flow channel (320) through the unidirectional air inlet section (350), and air in the heat exchange section (340) and the air source flow channel (320) is exhausted through the unidirectional air outlet section (360).
3. The active cooling speaker of claim 2,
the unidirectional intake section (350) comprises:
the air inlet baffle plate (351) is movably arranged in the unidirectional air inlet section (350), and the air inlet flow spacer ring (352) and the air inlet baffle piece (353) are positioned at two sides of the air inlet flow spacer plate (351), and the air inlet flow spacer ring (352) and the air inlet baffle piece (353) are fixedly connected with the unidirectional air inlet section (350); wherein the content of the first and second substances,
the intake airflow spacer ring (352) is positioned on one side close to the inlet of the unidirectional intake section (350);
the air inlet baffle stop (353) is positioned on the side away from the inlet of the one-way air inlet section (350);
the air inlet flow baffle (351) is suitable for being blown to the air inlet baffle stopper (353) by air flow during air inlet so as to enable the air flow to pass through a gap between the air inlet flow baffle (351) and the inner wall of the unidirectional air inlet section (350), and is suitable for being blown to and tightly attached to the air inlet flow spacer ring (352) by the air flow during air outlet so as to block the air inlet flow spacer ring (352).
4. The active cooling speaker of claim 3,
the unidirectional air outlet section (360) comprises:
the air outlet flow partition plate (361) is movably arranged in the unidirectional air outlet section (360), and an air outlet flow partition ring (362) and an air outlet partition plate stopper (363) are positioned at two sides of the air outlet flow partition plate (361), and the air outlet flow partition ring (362) and the air outlet partition plate stopper (363) are fixedly connected with the unidirectional air outlet section (360); wherein the content of the first and second substances,
the outlet gas flow spacer ring (362) is positioned on the side far away from the outlet of the unidirectional outlet section (360);
the air outlet baffle stopper (363) is positioned at one side close to the air outlet of the unidirectional air outlet section (360);
the air outlet flow partition plate (361) is suitable for being blown to the air outlet partition plate stopper (363) by air flow during air outlet so as to enable the air flow to pass through a gap between the air outlet flow partition plate (361) and the inner wall of the unidirectional air outlet section (360), and is suitable for being blown to and tightly attached to the air outlet flow spacer ring (362) by the air flow during air inlet so as to block the air outlet flow spacer ring (362).
5. The active cooling speaker of claim 4,
the adjacent unidirectional flow pipes (330) are arranged upside down.
6. The active cooling speaker of claim 4,
the vibration assembly (400) comprises:
an air-isolating diaphragm (410) connected to the air supply partition (310) to form an air supply space (420) in communication with the air supply flow passage (320);
a transmission member (430) for connecting the magnetic circuit assembly (200) and the air-isolating diaphragm (410) to vibrate the air-isolating diaphragm (410) to form outlet air and inlet air in the air source space (420).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111307198.4A CN114040306B (en) | 2021-11-05 | 2021-11-05 | Active heat dissipation type loudspeaker |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111307198.4A CN114040306B (en) | 2021-11-05 | 2021-11-05 | Active heat dissipation type loudspeaker |
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| CN114040306A CN114040306A (en) | 2022-02-11 |
| CN114040306B true CN114040306B (en) | 2023-03-28 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017219341A1 (en) * | 2016-06-24 | 2017-12-28 | 陈银芳 | High-efficiency heat dissipation mobile phone |
| CN210351614U (en) * | 2019-07-22 | 2020-04-17 | 瑞声科技(新加坡)有限公司 | Speaker device and mobile terminal |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7684585B2 (en) * | 2006-01-31 | 2010-03-23 | Alpine Electronics, Inc. | Thermal management system for speaker system having vented frame for establishing air passages |
| WO2017219340A1 (en) * | 2016-06-24 | 2017-12-28 | 陈银芳 | High-efficiency heat dissipation mobile phone speaker |
| CN110536189A (en) * | 2019-07-23 | 2019-12-03 | 瑞声科技(新加坡)有限公司 | Microphone device and mobile terminal |
| CN110582041B (en) * | 2019-08-14 | 2021-06-15 | 瑞声科技(新加坡)有限公司 | Sounding device and mobile terminal |
| CN112911472A (en) * | 2019-11-19 | 2021-06-04 | 北京小米移动软件有限公司 | Speaker device and mobile terminal |
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2021
- 2021-11-05 CN CN202111307198.4A patent/CN114040306B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017219341A1 (en) * | 2016-06-24 | 2017-12-28 | 陈银芳 | High-efficiency heat dissipation mobile phone |
| CN210351614U (en) * | 2019-07-22 | 2020-04-17 | 瑞声科技(新加坡)有限公司 | Speaker device and mobile terminal |
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| CN114040306A (en) | 2022-02-11 |
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