CN219329827U - Audio test equipment for waterproof sound-transmitting base material - Google Patents
Audio test equipment for waterproof sound-transmitting base material Download PDFInfo
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- CN219329827U CN219329827U CN202222975645.XU CN202222975645U CN219329827U CN 219329827 U CN219329827 U CN 219329827U CN 202222975645 U CN202222975645 U CN 202222975645U CN 219329827 U CN219329827 U CN 219329827U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/30—Against vector-borne diseases, e.g. mosquito-borne, fly-borne, tick-borne or waterborne diseases whose impact is exacerbated by climate change
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Abstract
The utility model provides audio test equipment for a waterproof sound-transmitting substrate, which comprises a mobile test platform, a pressing mechanism, a pressure adjusting mechanism, a test module, a frequency response loudspeaker and a sealing loudspeaker. The mobile test platform is used for placing products to be tested, the pressing mechanism is located above the mobile test platform, the pressure adjusting mechanism is arranged below the pressing mechanism, the test module is connected below the pressure adjusting mechanism and used for pressing the products to be tested on the mobile test platform to perform sound test, and the frequency response loudspeaker and the sealing loudspeaker are communicated with the positioning groove of the mobile test platform. The audio test equipment for the waterproof sound-transmitting substrate can press a product to be tested between the test module and the mobile test platform, can form a sealed and stable test environment, can perform acoustic test under set pressure, simultaneously set a frequency response loudspeaker and the sealing loudspeaker to test the product from different angles, and can test the sound-transmitting attenuation of the sound-transmitting substrate and the qualification of the mosquito coil disc channel groove structure, and the detection is comprehensive.
Description
Technical Field
The utility model relates to the field of sound transmission testing equipment of materials, in particular to audio testing equipment of a waterproof sound transmission base material.
Background
The waterproof performance is one of important performances of the watch, and is directly related to the service life of the watch, particularly for electronic watches, the influence of water on electronic components such as chips, speakers, microphones and cores is emphasized while the aim of powerful functions is fulfilled. Due to the requirements of the function of electronic products such as watches, the holes of the loudspeaker and the microphone are reserved on the dial plate for hearing the sound of the user or the loudspeaker emits the sound so as to be heard by the user. In order to achieve the balance between the microphone and the product housing, the design developer adds a waterproof material, i.e. a waterproof membrane, to prevent external water from entering the microphone, thus requiring that we have to test the acoustic performance of the material in the test of the element, so that the acoustic performance of the microphone is not affected while the highest waterproof performance is achieved.
In addition, when the microphone sound hole is blocked by sweat, dirt and the like during the use process of some products with high requirements, the MIC (microphone) is required to be in a working state, and the voice awakening or conversation condition of the user can be normally heard. Therefore, a product designer adds a mosquito coil shaped sound channel slot design on top of the product to prevent the performance of the microphone from being affected when the product primary acoustic channel is blocked by foreign objects. And simultaneously, the use effect of the front cavity can be added to the MIC (microphone). However, in the prior art, only a sampling inspection mode is generally used for testing the acoustic performance of the original waterproof and acoustic-transmitting membrane before assembly, and only whether the function of the waterproof and acoustic-transmitting membrane in a product is normal is detected and confirmed, the influence of pressure in practical application is not considered, no system is used for detecting the influence of different pressures on materials in the acoustic test, the test is too single, if the pressure control of the acoustic test is not performed, the situation that the test of the whole machine is poor can be caused when the materials are assembled into the whole machine for testing is avoided, and therefore manpower, material resources and financial resources in the reworking process of the whole machine are consumed.
Therefore, there is a need for an audio test apparatus for waterproof and acoustically transparent substrates.
Disclosure of Invention
The utility model provides audio test equipment for a waterproof sound-transmitting substrate, which aims to solve the problem that the test in the prior art is too single, and the acoustic performance of a waterproof sound-transmitting film under the action of pressure is lack, so that the test of the whole machine of a final product is poor.
In order to solve the technical problems, the technical scheme of the utility model is as follows: an audio test apparatus for a waterproof acoustically transparent substrate, comprising:
the mobile test platform is arranged on the base in a sliding manner and is provided with a positioning groove for placing a product to be tested;
the pressing mechanism is positioned above the mobile test platform;
the pressure adjusting mechanism is arranged below the pressing mechanism and is used for measuring the pressure of the product to be tested on the mobile test platform so as to adjust the pressing force of the test module;
the test module is connected below the pressure adjusting mechanism and used for pressing a product to be tested on the mobile test platform to perform sound test;
the frequency response loudspeaker is connected with the mobile test platform and communicated with the positioning groove through a first channel so as to detect the attenuation of sound penetrating through the waterproof and breathable film; and
and the sealing loudspeaker is connected with the mobile test platform and is communicated with the positioning groove through a second channel so as to detect the sound characteristic that sound passes through the channel groove structure of the mosquito-repellent incense disc.
In the utility model, the audio test equipment of the waterproof sound-transmitting substrate further comprises a micro-motion adjusting platform, the micro-motion adjusting platform comprises a main body plate and connecting plates connected to two ends of the main body plate, a boss is arranged on the outer side face of the base, two connecting plates are respectively and slidably connected between the two bosses on the outer side faces of the two ends of the base, the connecting plates are elastically connected with the bosses through spring columns, and the pressing mechanism is connected with the main body plate.
The middle part of the main body plate is provided with a through hole, and the test module passes through the through hole to perform sound test on the product to be tested on the mobile test platform.
In addition, pushing down the mechanism and including pushing down cylinder, vertical fixed plate, vertical slide and connecting vertical backup pad in vertical slide one side, vertical fixed plate with main part board fixed connection, vertical slide with vertical fixed plate sliding connection, the cylinder setting of pushing down is in one side of vertical fixed plate is used for the drive vertical slide slides, pressure adjustment mechanism with vertical backup pad is connected.
Further, the pressure adjusting mechanism comprises an adjusting motor, a sliding plate, a pressure sensor and a spring; the adjusting motor is fixedly connected with the vertical supporting plates, the sliding plates are connected between the two vertical supporting plates in a sliding mode, the pressure sensor is connected with the sliding plates, and the springs are connected between the pressure sensor and the testing module.
In the utility model, the test module comprises a pressing block, a microphone and a silica gel sheet, wherein the bottom surface of the pressing block is provided with a containing groove, the silica gel sheet encapsulates the microphone in the containing groove, and the silica gel sheet is provided with a sound transmission hole communicated with the containing groove.
The mobile test platform is provided with a silica gel carrier plate, and the positioning groove is formed in the silica gel carrier plate.
Further, the product to be tested comprises a mosquito coil channel groove structure and a waterproof sound-transmitting film which are connected with each other, a claw used for clamping the mosquito coil channel groove structure is arranged in the positioning groove, and the waterproof sound-transmitting film is pressed and fixed between the silica gel sheet and the silica gel carrier plate during testing.
In the utility model, the movable test platform, the pressing mechanism, the pressure adjusting mechanism and the test module are all arranged in a shell, one end of the shell is provided with a loading and unloading opening, the loading and unloading opening is positioned on the sliding track of the movable test platform, the audio test equipment of the waterproof sound-transmitting base material further comprises a sealing cover for sealing the loading and unloading opening, and the sealing cover is in sliding connection with the shell through an extension plate.
Further, an opening and closing cylinder is arranged at the bottom of the shell cover, the extension plate is connected with the output end of the opening and closing cylinder, and one end of the mobile test platform is connected with the inner side surface of the sealing cover.
Compared with the prior art, the utility model has the beneficial effects that: according to the audio test equipment for the waterproof sound-transmitting substrate, disclosed by the utility model, the product to be tested is pressed between the test module and the mobile test platform, so that a sealed and stable test environment can be formed, the acoustic test is performed under the set pressure, meanwhile, the product is tested from different angles by arranging the frequency response loudspeaker and the sealing loudspeaker, the sound-transmitting attenuation of the sound-transmitting substrate and the qualification of the mosquito coil disc channel groove structure can be tested, the detection is comprehensive, and the detection operation is convenient and rapid, and the efficiency is high.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the embodiments are briefly described below, and the drawings in the following description are only drawings corresponding to some embodiments of the present utility model.
Fig. 1 is a schematic structural view of a preferred embodiment of an audio test apparatus for a waterproof sound-transmitting substrate of the present utility model.
Fig. 2 is a schematic structural view of the audio test apparatus of the waterproof sound-transmitting substrate of the present utility model after the cover is removed.
Fig. 3 is a schematic structural diagram of a pressure adjusting mechanism of an audio test apparatus for a waterproof sound-transmitting substrate according to the present utility model.
Fig. 4 is a partially disassembled view of the test module and the silica gel carrier.
Fig. 5 is a mating diagram of the first channel and the second channel.
Fig. 6 is a schematic diagram of a channel slot structure of a mosquito coil.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
The terms of directions used in the present utility model, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "side", "top" and "bottom", are used for explaining and understanding the present utility model only with reference to the orientation of the drawings, and are not intended to limit the present utility model.
The words "first," "second," and the like in the terminology of the present utility model are used for descriptive purposes only and are not to be construed as indicating or implying relative importance and not as limiting the order of precedence.
In the present utility model, unless specifically stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
In the prior art, a sampling inspection mode is generally used for performing a simple acoustic performance test on an original waterproof sound-transmitting membrane before assembly, the test is too single, and the acoustic performance test on a structure after the waterproof sound-transmitting membrane is assembled is lacked, so that the final product may have defects in performance.
The following is a preferred embodiment of an audio test apparatus for a waterproof sound-transmitting substrate, which solves the above technical problems.
Referring to fig. 2, fig. 2 is a schematic structural diagram of the audio test apparatus with the waterproof sound-transmitting substrate of the present utility model after the housing is removed.
In the drawings, like structural elements are denoted by like reference numerals.
The utility model provides audio test equipment for a waterproof sound-transmitting substrate, which comprises a mobile test platform 13, a pressing mechanism, a pressure adjusting mechanism, a test module, a frequency response loudspeaker 19 and a sealing loudspeaker 1B.
The movable test platform 13 is slidably disposed on the base 17, and a positioning slot 1311 for placing the product 1C to be tested is disposed on the movable test platform 13.
The pushing mechanism is located above the movable test platform 13. The pressure adjusting mechanism is arranged below the pressing mechanism and is used for measuring the pressure of the product 1C to be tested on the mobile test platform 13 so as to adjust the pressing force of the test module. The test module is connected below the pressure adjusting mechanism and is used for pressing the product 1C to be tested on the mobile test platform 13 to perform sound test, the product 1C to be tested is pressed between the test module and the mobile test platform 13, a sealed and stable test environment can be formed, and the test result is more accurate.
The speaker 19 is connected to the mobile test platform 13 and communicates with the positioning slot 1311 through the first channel 191 to detect the attenuation of sound across the vented membrane. The sealing horn 1B is connected with the mobile test platform 13 and is communicated with the positioning groove through the second channel 1B1 to detect the sound characteristic of sound passing through the mosquito coil channel groove structure. Referring to fig. 6, fig. 6 is a schematic structural diagram of a channel structure of a mosquito coil, and reference numeral 191 in fig. 6 indicates that sound of the first channel 191 goes along the channel structure of the mosquito coil, and sound of the speaker 19 directly passes through a through hole in the middle portion to penetrate through a waterproof breathable film. In fig. 6, reference numeral 1B1 indicates the direction of sound of the second channel 1B1 along the channel groove structure of the mosquito coil, the sealing horn 1B passes through the annular channel and then passes through the through hole in the middle part to penetrate the waterproof and breathable film, and the sound detected after passing through the unqualified annular channel is different. Thus, different items are detected, and the detection is comprehensive.
Referring to fig. 2, the audio test apparatus for a waterproof and acoustically transparent substrate of the present embodiment further includes a micro-adjustment platform, the micro-adjustment platform includes a main body plate 181 and connection plates 182 connected to two ends of the main body plate 181, a boss 171 is disposed on an outer side surface of the base 17, two connection plates 182 are respectively slidably connected between the two bosses 171 on the outer side surfaces of the two ends of the base 17, the connection plates 182 and the bosses 171 are elastically connected through spring columns 183, and a pressing mechanism is connected to the main body plate 181. The test module is provided with a positioning column, and the silica gel carrier plate 131 is provided with a positioning hole corresponding to the positioning column. The elastic force of the spring column 183 is parallel to the sliding direction of the movable test platform 13, so that the main body plate 181 can be subjected to micro-motion adjustment, and the test module can slide adaptively according to the condition of pressing down and positioning, thereby being beneficial to positioning matching of the positioning holes corresponding to the positioning columns.
Wherein, the middle part of main body board 181 sets up the through-hole, and the test module passes the through-hole and carries out the sound test to the product 1C that awaits measuring on the mobile test platform 13 for main body board 181 can be to pushing down mechanism, pressure adjustment mechanism, the stable balanced support of test module.
In addition, the pressing mechanism includes a pressing cylinder 151, a vertical fixing plate 152, a vertical sliding plate 153, and a vertical supporting plate 154 connected to one side of the vertical sliding plate 153. The vertical fixed plate 152 is fixedly connected with the main body plate 181, the vertical sliding plate 153 is in sliding connection with the vertical fixed plate 152, the lower pressure cylinder 151 is arranged on one side of the vertical fixed plate 152 and used for driving the vertical sliding plate 153 to slide, and the pressure adjusting mechanism is connected with the vertical supporting plate 154.
Referring to fig. 3, the pressure adjusting mechanism in the present embodiment includes an adjusting motor 161, a sliding plate 162, a pressure sensor 163, and a spring 164. The adjustment motor 161 is fixedly connected with the vertical support plates 154, the sliding plate 162 is slidably connected between the two vertical support plates 154, the pressure sensor 163 is connected with the sliding plate 162, and the spring 164 is connected between the pressure sensor 163 and the test module. The pressure sensor 163 and the adjusting motor 161 are both connected with a controller of the device, when the pressing mechanism is controlled to press down to be close to a product to be tested, the pressing mechanism stops, then the adjusting motor 161 starts to act, the pressure value is transmitted to the controller in real time through the pressure sensor 163, the controller adjusts the pulse of the adjusting motor according to the received pressure value, and therefore the pressure value required by testing is achieved, the controller can control the adjusting motor 161 to work according to sensing information fed back by the sensor 163, and further the testing module is controlled to press down according to the required pressure.
Referring to fig. 4, the test module in this embodiment includes a pressing block 1A1, a microphone 1A2, and a silica gel sheet 1A3, wherein a receiving groove is provided on a bottom surface of the pressing block 1A1, the silica gel sheet 1A3 encapsulates the microphone 1A2 in the receiving groove, and a sound transmission hole communicating with the receiving groove is provided on the silica gel sheet 1 A3.
The mobile test platform 13 is provided with a silica gel carrier 131, and the positioning slot 1311 is disposed on the silica gel carrier 131. The silica gel sheet 1A3 is in contact with and pressed against the silica gel carrier plate 131, so that the sealing performance is good.
The product 1C to be tested in this embodiment includes a mosquito coil channel structure and a waterproof sound-transmitting film connected to each other, the mosquito coil channel structure can refer to fig. 6, and the waterproof sound-transmitting film covers the bottom surface of the mosquito coil channel structure. The positioning groove 1311 is internally provided with a claw for clamping the sound channel groove structure, and the waterproof sound-transmitting membrane is pressed and fixed between the silica gel sheet 1A3 and the silica gel carrier plate 131 during testing.
The mobile test platform 13, the pressing mechanism, the pressure adjusting mechanism and the test module in the embodiment are all arranged in the shell 11, one end of the shell 11 is provided with an upper blanking port and a lower blanking port, the upper blanking port is positioned on the sliding track of the mobile test platform 13, the audio test equipment for the waterproof sound-transmitting base material further comprises a sealing cover 12 for sealing the upper blanking port, and the sealing cover 12 is in sliding connection with the shell 11 through an extension plate. The sealing cover 12 is sealed with the shell cover 11, so that a test environment with better sealing performance is provided for testing.
The bottom of the shell cover 11 is provided with an opening and closing cylinder 14, the extension plate is connected with the output end of the opening and closing cylinder 14, and one end of the mobile test platform 13 is connected with the inner side surface of the sealing cover 12. The sealing cover 12 can be opened through the opening and closing cylinder 14, and meanwhile, the movable testing platform 13 can be driven to slide out for taking and placing products, so that the operation is convenient.
Referring to fig. 5, in the present embodiment, the speaker 19 is connected to the positioning slot 1311 through the first channel 191, and the sealing speaker 1B is connected to the first channel 191 through the second channel 1B 1.
The working principle of the utility model is as follows: when the device works, firstly, an FR (frequency response) calibration product is used to calibrate a sound frequency band of 100-10KHz in cooperation with a frequency response loudspeaker. When the calibration of the frequency response loudspeaker is finished, testing the FR (frequency response) calibration product once, automatically storing a curve tested by the FR (frequency response) calibration product by software, and recording the curve as a test frequency response standard line. Then, the normal product is tested, the software automatically calculates the difference between the normal product and the calibrator, and then calculates the Sensitivity (Sensitivity), the frequency response curve and The Harmonic Distortion (THD) of the product. The accuracy of the test is ensured by combining sealing environments formed by the two silica gel sheets and the silica gel carrier plate.
And then, using a sealing standard calibration product to be matched with a sealing loudspeaker to calibrate the sound frequency band of 20-500 Hz. When the sealing calibration is finished, the check product is tested once, the software automatically stores the curve tested by the check product, and the curve is recorded as a test sealing sound standard line. Then, the normal product is tested, the software automatically calculates the difference between the normal product and the calibrator, and then calculates the sound allowance (Sealing) of the sound channel passing through the product.
Thus, the test process of the audio test apparatus for the waterproof sound-transmitting substrate of the present preferred embodiment is completed.
The audio test equipment of waterproof sound-transmitting substrate of this preferred embodiment can form sealed, stable test environment through pressing the product that awaits measuring between test module and removal test platform, carries out acoustic test under the settlement pressure, sets up simultaneously and frequency response loudspeaker and sealed loudspeaker from different angle test products, can test the sound-transmitting attenuation nature of sound-transmitting substrate and the qualification of mosquito-repellent incense dish channel groove structure, detects comprehensively, detects simple operation efficient.
In summary, although the present utility model has been described in terms of the preferred embodiments, the preferred embodiments are not limited to the above embodiments, and various modifications and changes can be made by one skilled in the art without departing from the spirit and scope of the utility model, and the scope of the utility model is defined by the appended claims.
Claims (10)
1. An audio test apparatus for a waterproof acoustically transparent substrate, comprising:
the mobile test platform is arranged on the base in a sliding manner and is provided with a positioning groove for placing a product to be tested;
the pressing mechanism is positioned above the mobile test platform;
the pressure adjusting mechanism is arranged below the pressing mechanism and is used for measuring the pressure of the product to be tested on the mobile test platform so as to adjust the pressing force of the test module;
the test module is connected below the pressure adjusting mechanism and used for pressing a product to be tested on the mobile test platform to perform sound test;
the frequency response loudspeaker is connected with the mobile test platform and communicated with the positioning groove through a first channel so as to detect the attenuation of sound penetrating through the waterproof and breathable film; and
and the sealing loudspeaker is connected with the mobile test platform and is communicated with the positioning groove through a second channel so as to detect the sound characteristic that sound passes through the channel groove structure of the mosquito-repellent incense disc.
2. The audio test device of a waterproof sound-transmitting substrate according to claim 1, further comprising a micro-motion adjustment platform, wherein the micro-motion adjustment platform comprises a main body plate and connecting plates connected to two ends of the main body plate, a boss is arranged on the outer side surface of the base, two connecting plates are respectively and slidably connected between the two bosses on the outer side surfaces of the two ends of the base, the connecting plates are elastically connected with the bosses through spring columns, and the pressing mechanism is connected with the main body plate.
3. The audio test device for a waterproof and acoustically transparent substrate according to claim 2, wherein a through hole is formed in the middle of the main body board, and the test module performs acoustic test on the product to be tested on the mobile test platform through the through hole.
4. The audio test device for a waterproof and acoustically transparent substrate according to claim 2, wherein the pressing mechanism comprises a pressing cylinder, a vertical fixing plate, a vertical sliding plate and a vertical supporting plate connected to one side of the vertical sliding plate, the vertical fixing plate is fixedly connected with the main body plate, the vertical sliding plate is slidably connected with the vertical fixing plate, the pressing cylinder is arranged on one side of the vertical fixing plate and used for driving the vertical sliding plate to slide, and the pressure adjusting mechanism is connected with the vertical supporting plate.
5. The audio testing device of a waterproof sound-transmitting substrate according to claim 4, wherein the pressure adjustment mechanism comprises an adjustment motor, a sliding plate, a pressure sensor, and a spring; the adjusting motor is fixedly connected with the vertical supporting plates, the sliding plates are connected between the two vertical supporting plates in a sliding mode, the pressure sensor is connected with the sliding plates, and the springs are connected between the pressure sensor and the testing module.
6. The audio test device of a waterproof and acoustically transparent substrate according to claim 1, wherein the test module comprises a press block, a microphone and a silica gel sheet, wherein a containing groove is formed in the bottom surface of the press block, the microphone is encapsulated in the containing groove by the silica gel sheet, and a sound transmission hole communicated with the containing groove is formed in the silica gel sheet.
7. The audio test device of the waterproof and acoustically transparent substrate of claim 6, wherein the mobile test platform is provided with a silica gel carrier plate, and the positioning groove is formed in the silica gel carrier plate.
8. The audio test device for the waterproof and acoustically transparent substrate according to claim 1, wherein the movable test platform, the pressing mechanism, the pressure adjusting mechanism and the test module are all arranged in a housing, one end of the housing is provided with a loading and unloading opening, the loading and unloading opening is positioned on a sliding track of the movable test platform, the audio test device for the waterproof and acoustically transparent substrate further comprises a sealing cover for sealing the loading and unloading opening, and the sealing cover is in sliding connection with the housing through an extension plate.
9. The audio test device of the waterproof and acoustically transparent substrate according to claim 8, wherein an opening and closing cylinder is arranged at the bottom of the housing, the extension plate is connected with the output end of the opening and closing cylinder, and one end of the movable test platform is connected with the inner side surface of the sealing cover.
10. The audio test device for a waterproof and acoustically transparent substrate according to claim 7, wherein the product to be tested comprises a mosquito coil tray channel structure and a waterproof and acoustically transparent film which are connected with each other, a claw for clamping the mosquito coil tray channel structure is arranged in the positioning groove, and the waterproof and acoustically transparent film is pressed and fixed between the silica gel sheet and the silica gel carrier plate during the test.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222975645.XU CN219329827U (en) | 2022-11-07 | 2022-11-07 | Audio test equipment for waterproof sound-transmitting base material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222975645.XU CN219329827U (en) | 2022-11-07 | 2022-11-07 | Audio test equipment for waterproof sound-transmitting base material |
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| CN219329827U true CN219329827U (en) | 2023-07-11 |
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| CN202222975645.XU Active CN219329827U (en) | 2022-11-07 | 2022-11-07 | Audio test equipment for waterproof sound-transmitting base material |
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- 2022-11-07 CN CN202222975645.XU patent/CN219329827U/en active Active
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