CN209692990U - A kind of sound capturing unit and electronic equipment - Google Patents
A kind of sound capturing unit and electronic equipment Download PDFInfo
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- CN209692990U CN209692990U CN201920655953.XU CN201920655953U CN209692990U CN 209692990 U CN209692990 U CN 209692990U CN 201920655953 U CN201920655953 U CN 201920655953U CN 209692990 U CN209692990 U CN 209692990U
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- flexible shell
- pickup hole
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- hole
- outer housing
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Abstract
This disclosure relates to technical field of electronic equipment, more particularly to a kind of sound capturing unit.The technical problem to be solved is that non interactive external voice, vibration, echo and pickup path is too long etc. influences the effective discrimination of microphone, and then influences user far field interactive experience.It include: wiring board, microphone and shell, shell clamps and printed circuit board, and shell pickup hole and microphone pickup hole are coaxially disposed, and the diameter in shell pickup hole is not less than the diameter in microphone pickup hole.Disclosure sound capturing unit at least has the advantage that the multiple sound chamber for preventing and generating due to gap, weakens external non interactive sound and echo interference；Effectively eliminate the influence of internal sound and vibration for microphone；The elimination in the gap of wiring board, flexible shell and outer housing from each other simultaneously, forms most short microphone pickup path, improves the effective discrimination of microphone.
Description
Technical field
This disclosure relates to technical field of electronic equipment, more particularly to a kind of sound capturing unit and electronic equipment.
Background technique
Intelligent sound interactive device is possible to the function realization layer or decorative layer of more than one at present.Intelligent sound is handed over
Mutual equipment carries out human-computer interaction often through far field voice, and human-computer interaction is that the acquisition based on external active interactive sound is converted into
Valid data and database data comparison form what feedback was reached, and outside realization of the valid data by the microphone inside equipment
The acquisition of portion's sound differentiates to isolate valid data.And non interactive external voice, vibration, equipment inside echo etc. are all
Microphone be will affect to form a large amount of interference invalid data, microphone makes collecting part as sound collection component
It needs as far as possible through the close extraneous active interactive sound source of hole.In addition, effectively interactive sound is to microphone inside equipment
Diffusion path length, that is, microphone pickup path also will affect the acquisition recognition effect of sound.
Microphone is placed in inside equipment more as voice collecting device, and external voice data to be collected is multiple by equipment
The barrier in the gap between shell multiple sound chamber easy to form and multilayer shell thickness reason are formed in longer voice pickup
Portion path.The vibration influence microphone pickup effect of part of speech interactive device itself simultaneously.
In conclusion non interactive external voice, vibration, echo and pickup the path microphone that influences such as too long are effectively known
Not rate, and then influence user far field interactive experience.
Utility model content
The main purpose of the disclosure is, provides a kind of new structural sound capturing unit, and technology to be solved is asked
Topic is non interactive external voice, vibration, echo and pickup path is too long etc. influences the effective discrimination of microphone, and then influences
User far field interactive experience.
It the purpose of the disclosure and solves its technical problem and adopts the following technical solutions to realize.It is proposed according to the disclosure
A kind of sound capturing unit, comprising:
Wiring board；
Microphone is equipped with microphone pickup hole, the wiring board side is fixed on, with the circuit board electrical connection；
Flexible shell is equipped with the corresponding microphone pickup for clamping simultaneously printed circuit board on the flexible shell
The flexible shell pickup hole in hole, the diameter in flexible shell pickup hole are not less than the diameter in microphone pickup hole.
It the purpose of the disclosure and solves its technical problem also following technical measures can be used to further realize.
Preferably, sound capturing unit above-mentioned, wherein further include:
Outer housing, for installing flexible shell, the inner surface of the outer housing is adjacent to the outer surface of the flexible shell, and
And sealing flexible shell, it is equipped on the outer housing coaxial with flexible shell pickup hole and microphone pickup hole
Outer housing pickup hole, the diameter in outer housing pickup hole are not less than the diameter in flexible shell pickup hole.
Preferably, sound capturing unit above-mentioned, wherein the flexible shell includes flexible shell upper cover and flexible shell
Ontology；
The flexible shell upper cover is equipped with the first positioning device；
The flexible shell ontology is equipped with the second positioning device corresponding with first positioning device；
The groove for installing the wiring board is equipped on lid on flexible shell ontology and/or the flexible shell；
The flexible shell upper cover is fastened on the flexible shell ontology, wiring board described in fixing seal.
Preferably, sound capturing unit above-mentioned, wherein the side of the flexible shell upper cover and the flexible shell sheet
The side of body is rotatably coupled.
Preferably, sound capturing unit above-mentioned, wherein flexible shell pickup hole is set on flexible shell on lid.
Preferably, sound capturing unit above-mentioned, wherein outer housing includes outer housing ontology and outer housing cover board；
Outer housing location structure is equipped with inside outer enclosure body；
Flexible shell location structure corresponding with outer housing location structure is equipped in the flexible shell ontology；
The outer housing cover board is fastened on the outer housing ontology.
Preferably, sound capturing unit above-mentioned, wherein outer housing pickup hole is arranged on outer housing cover.
Preferably, sound capturing unit above-mentioned, wherein further including n middle case between flexible shell and outer housing
I-th of middle casing is successively installed on i+1 middle case for fixing and sealing flexible shell by body, the 1st middle casing
In vivo, and between adjacent middle casing it fits closely, n intermediate shell is installed in outer housing, and tight with outer housing
Closely connected conjunction；
The n middle casing is equipped with coaxial middle casing pickup hole, also, the pickup of i+1 middle casing
Diameter of the diameter in hole not less than the pickup hole of i-th of middle casing；
The pickup hole and flexible shell pickup hole of 1st middle casing are coaxially disposed, and the pickup of the 1st middle casing
The diameter in hole is not less than the diameter in flexible shell pickup hole；
Outer housing pickup hole and the pickup hole of n intermediate shell are coaxially disposed, and the diameter in the pickup hole of outer housing
Not less than the diameter in n intermediate shell pickup hole.
Preferably, sound capturing unit above-mentioned works as setting wherein the microphone is at least arranged one in the circuit board
It is arranged when there are multiple microphones in array.
Preferably, sound capturing unit above-mentioned, wherein the microphone is set to the side of wiring board, in the route
Plate is equipped with the wiring board pickup through-hole opposite with microphone pickup hole, and microphone pickup hole, the wiring board pickup are logical
Hole and the coaxial arrangement of flexible shell pickup hole, flexible shell pickup hole is opposite with the wiring board pickup through-hole, and
And the diameter in flexible shell pickup hole be not less than wiring board pickup through-hole diameter, the wiring board pickup through-hole it is straight
Diameter is not less than the diameter in microphone pickup hole.
Preferably, sound capturing unit above-mentioned, wherein the wiring board pickup through-hole, flexible shell pickup hole,
The pickup hole of the n middle casing and the inner surface in outer housing pickup hole are tapered.
It the purpose of the disclosure and solves its technical problem also the following technical solution is employed to realize.It is proposed according to the disclosure
A kind of electronic equipment,
Including above sound acquisition device.
By above-mentioned technical proposal, disclosure sound capturing unit is at least had the advantage that
Wiring board, flexible shell and outer housing held tight and are sealed from each other, are eliminated between three components
Gap, it is therefore prevented that due to the multiple sound chamber that gap generates, weaken external non interactive sound and echo interference；It effectively eliminates
The influence of internal sound and vibration for microphone；The gap of wiring board, flexible shell and outer housing from each other disappears simultaneously
It removes, forms most short microphone pickup path, improve the effective discrimination of microphone.
Above description is only the general introduction of disclosed technique scheme, in order to better understand the technological means of the disclosure,
And can be implemented in accordance with the contents of the specification, with the preferred embodiment of the disclosure and cooperate attached drawing below detailed description is as follows.
Detailed description of the invention
Fig. 1 is the exploded view for the sound capturing unit that embodiment of the disclosure proposes；
Fig. 2 is the sectional view for the sound capturing unit that embodiment of the disclosure proposes；
Fig. 3 is the perspective view for the flexible shell that embodiment of the disclosure proposes；
Fig. 4 is the perspective view for the flexible shell that embodiment of the disclosure proposes；
Fig. 5 is the schematic diagram for the microphone circular array arrangement that embodiment of the disclosure proposes；
Fig. 6 is the schematic diagram for the microphone stripe array arrangement that embodiment of the disclosure proposes；
Fig. 7 is the front schematic view that the microphone that embodiment of the disclosure proposes is set to wiring board；
Fig. 8 is the schematic rear view that the microphone that embodiment of the disclosure proposes is set to wiring board；
Fig. 9 is the perspective view for the electronic equipment that embodiment of the disclosure proposes.
Specific embodiment
Further to illustrate that the disclosure is the technical means and efficacy reaching predetermined open purpose and being taken, below in conjunction with
Attached drawing and preferred embodiment, to according to the disclosure propose sound capturing unit, specific embodiment, structure, feature and its
Effect, detailed description is as follows.In the following description, what different " embodiment " or " embodiment " referred to is not necessarily same implementation
Example.In addition, the special characteristic, structure or feature in one or more embodiments can be combined by any suitable form.
As illustrated in fig. 1 and 2, a kind of sound capturing unit that one embodiment of the disclosure proposes comprising: wiring board
120；Microphone is equipped with microphone pickup hole 141, is fixed on 120 side of wiring board, is electrically connected with the wiring board 120；
Flexible shell 130 is equipped with the corresponding microphone pickup for clamping simultaneously printed circuit board 120 on the flexible shell 130
The diameter in the flexible shell pickup hole 133 in hole 141, flexible shell pickup hole 133 is not less than microphone pickup hole 141
Diameter.
It will be set in flexible shell after microphone and circuit board electrical connection, pass through flexible shell held tight wiring board.
Flexible shell preferably uses the silica gel below of shore hardness 60, rubber or EVA to be made.Flexible shell is needed according to route board foot
Other device sizes that very little, microphone and needs avoid are carried out in inside keeps away position.In corresponding microphone pickup hole in flexible shell
The flexible shell pickup hole coaxial with microphone pickup hole, the loudspeaker that flexible shell pickup hole is preferably amplified outward are set on body
Shape hole, flexible shell pickup hole minimum-value aperture are not less than the maximum diameter of hole in microphone pickup hole.
Wiring board and shell held tight and are sealed from each other, eliminate the gap between wiring board and shell,
The multiple sound chamber generated due to gap is prevented, external non interactive sound and echo interference are weakened；Effectively eliminate internal sound
The influence of sound and vibration for microphone；The elimination in the gap of wiring board and shell from each other simultaneously, forms most short Mike
Wind pickup path improves the effective discrimination of microphone.
Further, as one embodiment, the sound capturing unit, further includes: outer housing 110, it is soft for installing
Property shell 130, the inner surface of the outer housing 110 are adjacent to the outer surface of the flexible shell 130, and sealing shell body 110,
The outer housing coaxial with flexible shell pickup hole 133 and microphone pickup hole 141 is equipped on the outer housing 110
Pickup hole 113, the diameter in outer housing pickup hole 113 are not less than the diameter in flexible shell pickup hole 133.
The above-mentioned flexible shell assembled is installed in outer housing, and outer housing is sealed after clamping flexible shell
Processing, eliminates the gap between outer housing and flexible shell.Outer housing pickup hole and flexible shell pickup hole are coaxially disposed, and
And outer housing pickup hole is horn-like in amplifying outward, ensure that microphone pickup hole, flexible shell pickup hole and outer housing pick up
Sound hole is connected to completely with the external world.
The wiring board equipped with microphone and sealing are clamped by flexible shell, outer housing clamps flexible shell and seals, and
And flexible shell pickup hole and microphone pickup hole coaxial communication are arranged, flexible shell pickup hole minimum-value aperture is not less than the wheat
The structure of the maximum diameter of hole in gram wind pickup hole, eliminates the gap between wiring board, flexible shell and outer housing, it is therefore prevented that due to
The multiple sound chamber that gap generates weakens external non interactive sound and echo interference；Effectively eliminate internal sound and vibration pair
In the influence of microphone；The elimination in the gap of wiring board, flexible shell and outer housing from each other simultaneously, forms most short Mike
Wind pickup path improves the effective discrimination of microphone.
Further, as one embodiment, as shown in figure 3, the flexible shell 130 includes flexible shell upper cover 132
With flexible shell ontology 131；The flexible shell upper cover 132 is equipped with the first positioning device 135；The flexible shell ontology 131
Equipped with second positioning device 135 ' corresponding with first positioning device 135；In flexible shell ontology and/or the flexible shell
Lid is equipped with the groove 134 for installing the wiring board 120 on body；The flexible shell upper cover 132 is fastened on the flexible shell
On ontology 131, wiring board described in fixing seal.
As shown, the wiring board equipped with microphone is set in the groove of flexible shell ontology, it is recessed by being set to
Mutual location structure in slot and on wiring board positions the installation site of wiring board, further, in flexible shell upper cover
When being fastened on flexible shell ontology, flexible shell upper cover and flexible shell are limited by the first positioning device and the second positioning device
The position of ontology, preferably the first positioning device are protrusion, and the second positioning device is groove corresponding with the protrusion.Using two
The purpose of the mode of secondary positioning is so that the flexible shell pickup hole and microphone pickup hole that are set on flexible shell are coaxial
Connection, effectively improves the pickup effect of microphone.
Wiring board is closely clamped by flexible shell upper cover and flexible shell ontology simultaneously, and is pasted in flexible shell upper cover
Conjunction face and flexible shell ontology binding face are sealed by bonding agent, and bond area can be with maximum area after needing to guarantee bonding
Bonding wiring board and microphone.Attached glue is forbidden on microphone pickup hole and periphery, needs to guarantee that aperture is unimpeded.Seal rear board
Change in location cannot occur in flexible shell, ensure that flexible shell pickup hole and the position in microphone pickup hole are fixed, and
And effectively eliminate the pickup effect that microphone is improved due to the vibration that structure is not fixed and is generated.
Further, it is preferred that, as shown in figure 3, the side of the flexible shell upper cover 132 and the flexible shell
The side of body ontology 131 is rotatably coupled.
It is connected by a hinge between flexible shell upper cover and flexible shell ontology, it is easy for installation.
Further, it is preferred that, as shown in figure 3, flexible shell pickup hole 133 is set to flexible shell upper cover
On 132.
Groove is set on flexible shell ontology due to taking, for installing wiring board, it is preferred that, take wheat
Gram wind is arranged towards the direction of flexible shell upper cover, and flexible shell pickup hole is set on flexible shell on lid.
Further, as one embodiment, as shown in Figure 1, outer housing 110 includes outer housing ontology 111 and outer housing
Cover board 112；Outer housing location structure 114 is equipped with inside outer enclosure body 111；As shown in figure 4, in the flexible shell ontology
131 are equipped with flexible shell location structure 136 corresponding with outer housing location structure 114；The outer housing cover board 112 is fastened on
On the outer housing ontology 111.
It is preferred that shell location structure is pillar, flexible shell positioning device is blind hole corresponding with pillar.Pass through shell
The cooperation of body location structure and flexible shell location structure defines installation site of the flexible shell in outer housing, ensure that
The coaxial communication in outer housing pickup hole and flexible shell pickup hole, improves the pickup effect of microphone.
Further, it is preferred that, as shown in Figure 1, outer housing pickup hole 113 be arranged on outer housing cover 112.
Flexible shell pickup hole is set to flexible shell upper cover, and due to passing through outer housing location structure and flexible shell
The cooperation of location structure, installation site of the positioning flexible shell in outer housing, therefore, flexible shell upper cover is towards outer housing lid
Outer housing pickup hole is preferably set to outer housing cover board by plate direction, ensure that outer housing pickup hole and flexible shell pickup hole
Coaxial communication, improve the pickup effect of microphone.
It further, further include n middle casing between flexible shell 130 and outer housing 110 as one embodiment
I-th of middle casing is successively installed on for fixing and sealing flexible shell 130 by (not shown), the 1st middle casing
It in i+1 middle casing, and is fitted closely between adjacent middle casing, n intermediate shell is installed on outer housing 110
It is interior, and fitted closely with outer housing 110；The n middle casing is equipped with coaxial middle casing pickup hole, also, i+1
Diameter of the diameter in the pickup hole of a middle casing not less than the pickup hole of i-th of middle casing；The pickup of 1st middle casing
Hole and flexible shell pickup hole 133 are coaxially disposed, and the diameter in the pickup hole of the 1st middle casing is picked up not less than flexible shell
The diameter of sound hole 133；Outer housing pickup hole 113 and the pickup hole of n intermediate shell are coaxially disposed, and outer housing pickup hole
113 diameter is not less than the diameter in n intermediate shell pickup hole.
In the above-described embodiments, outer housing, flexible shell and wiring board constitute the similar sandwich of tight gluing, sealing
Structure, improve the pickup effect of microphone.On this basis in the present embodiment, between flexible shell and outer housing also
Multiple middle casings can be set, set-up mode is identical as above embodiments, it is necessary to assure tight gluing, sealing between each shell,
The generation for eliminating the multiple sound chamber between each shell, shortens the pickup path of microphone.The pickup hole of each shell is coaxial, and by
Pickup bore dia is sequentially increased or identical from inside to outside, to realize that microphone pickup hole complete is connected to extraneous.
Further, as one embodiment, as it can be seen in figures 5 and 6, at least being set in 140 assist side 120 of the microphone
One is set, is arranged when being provided with multiple microphones 140 in array.
Multiple microphones can be set on a wiring board, to improve audio.It is preferred that each microphone is with array manner
Setting.Two kinds of preferred array manners are taken, one is circular array as shown in Figure 5, the other is bar shaped as shown in FIG. 6
Array.It is to illustrate the structure of sound capturing unit with stripe array above, circular array is equally applicable.Both battle arrays
Column mode can effectively improve the pickup effect of microphone.
Further, as one embodiment, as shown in figure 8, the microphone 140 is set to the side of wiring board 120,
The wiring board pickup through-hole 121 opposite with microphone pickup hole 141, the microphone pickup are equipped on the wiring board 120
Hole 141, the wiring board pickup through-hole 121 and flexible shell pickup hole 133 are coaxially disposed, flexible shell pickup hole
It is opposite with the wiring board pickup through-hole, also, the diameter in flexible shell pickup hole 133 is not less than the wiring board pickup
The diameter of through-hole 121, the diameter of the wiring board pickup through-hole 121 are not less than the diameter in microphone pickup hole 141.
Embodiment of above, as shown in fig. 7, being to illustrate sound with circuit board electrical connection with the front of microphone assist side
The embodiment of the structure of sound acquisition device, microphone pickup hole can be directly connected to flexible shell pickup hole, but applied
In, often for some reason, such as the special designing of wiring board or the effective use in space etc., microphone is set to line
The back side of road plate, as shown in figure 8, preventing it from receiving audio signal well at this point, wiring board has blocked microphone pickup hole
Transmission, therefore, it is necessary to which wiring board pickup through-hole is arranged in the circuit board, in order to transmit audio signal, route well
Plate pickup through-hole and microphone pickup hole are coaxially disposed, also, the diameter of wiring board pickup through-hole is picked up not less than the microphone
The diameter of sound hole.
Further, it is preferred that, the wiring board pickup through-hole 121, flexible shell pickup hole 133, institute
The inner surface in the pickup hole and outer housing pickup hole 113 of stating n middle casing is tapered.
The pickup hole of the taper is similar to horn shape, effectively transmits and concentrates on microphone extraneous sound and picks up
Sound hole improves the effect of microphone pickup.
As shown in figure 9, another embodiment of the present disclosure proposes a kind of electronic equipment, including above sound acquisition device 100.
Above sound acquisition device is applied to electronic equipment, it is therefore prevented that due to the multiple sound chamber that gap generates, weaken outer
Portion's non interactive sound and echo interference；Effectively eliminate the influence of internal sound and vibration for microphone；While wiring board,
The elimination in the gap of flexible shell and outer housing from each other forms most short microphone pickup path, and improving microphone has
Imitate discrimination.
The above is only the preferred embodiment of the disclosure, not makes any form of restriction to the disclosure, according to
According to the technical spirit of disclosure any simple modification, equivalent change and modification to the above embodiments, this public affairs is still fallen within
In the range of opening technical solution.
Claims (12)
1. a kind of sound capturing unit, which is characterized in that
Include:
Wiring board；
Microphone is equipped with microphone pickup hole, the wiring board side is fixed on, with the circuit board electrical connection；
Flexible shell is equipped with corresponding microphone pickup hole for wiring board described in fixing seal on the flexible shell
Flexible shell pickup hole, the diameter in flexible shell pickup hole is not less than the diameter in microphone pickup hole.
2. sound capturing unit according to claim 1, which is characterized in that further include:
Outer housing, for installing flexible shell, the inner surface of the outer housing is adjacent to the outer surface of the flexible shell, and close
Flexible shell is sealed, the shell coaxial with flexible shell pickup hole and microphone pickup hole is equipped on the outer housing
Body pickup hole, the diameter in outer housing pickup hole are not less than the diameter in flexible shell pickup hole.
3. sound capturing unit according to claim 2, which is characterized in that
The flexible shell includes flexible shell upper cover and flexible shell ontology；
The flexible shell upper cover is equipped with the first positioning device；
The flexible shell ontology is equipped with the second positioning device corresponding with first positioning device；
The groove for installing the wiring board is equipped on lid on flexible shell ontology and/or the flexible shell；
The flexible shell upper cover is fastened on the flexible shell ontology, wiring board described in fixing seal.
4. sound capturing unit according to claim 3, which is characterized in that
The side of the flexible shell upper cover and the side of the flexible shell ontology are rotatably coupled.
5. sound capturing unit according to claim 4, which is characterized in that
Flexible shell pickup hole is set on flexible shell on lid.
6. sound capturing unit according to claim 3, which is characterized in that
Outer housing includes outer housing ontology and outer housing cover board；
Outer housing location structure is equipped with inside outer enclosure body；
Flexible shell location structure corresponding with outer housing location structure is equipped in the flexible shell ontology；
The outer housing cover board is fastened on the outer housing ontology.
7. sound capturing unit according to claim 6, which is characterized in that
Outer housing pickup hole is arranged on outer housing cover.
8. sound capturing unit according to claim 2, which is characterized in that
It further include n middle casing between flexible shell and outer housing, the 1st middle casing is for clamping and sealing flexible shell
I-th of middle casing is successively installed in i+1 middle casing by body, and is fitted closely between adjacent middle casing
And seal, n intermediate shell is installed in outer housing, and is fitted closely with outer housing；
The n middle casing is equipped with coaxial middle casing pickup hole, also, the pickup hole of i+1 middle casing
Diameter of the diameter not less than the pickup hole of i-th of middle casing；
The pickup hole and flexible shell pickup hole of 1st middle casing are coaxially disposed, and the pickup hole of the 1st middle casing
Diameter is not less than the diameter in flexible shell pickup hole；
Outer housing pickup hole and the pickup hole of n intermediate shell are coaxially disposed, and the diameter in the pickup hole of outer housing is not small
Diameter in n intermediate shell pickup hole.
9. sound capturing unit according to claim 1, which is characterized in that
The microphone is at least arranged one in the circuit board, is arranged when a plurality of microphones is provided in array.
10. sound capturing unit according to claim 9, which is characterized in that
The microphone is set to the side of wiring board, and the wiring board opposite with microphone pickup hole is equipped on the wiring board
Pickup through-hole, microphone pickup hole, the wiring board pickup through-hole and the coaxial arrangement of flexible shell pickup hole are described
Flexible shell pickup hole is opposite with the wiring board pickup through-hole, also, the diameter in flexible shell pickup hole is not less than line
The diameter in the diameter microphone pickup hole of road plate pickup through-hole.
11. sound capturing unit according to claim 8, which is characterized in that
The wiring board pickup through-hole, flexible shell pickup hole, the pickup hole of the n middle casing and the outer housing
The inner surface in pickup hole is tapered.
12. a kind of electronic equipment, which is characterized in that
Any sound capturing unit including the claims 1 to 11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920655953.XU CN209692990U (en) | 2019-05-09 | 2019-05-09 | A kind of sound capturing unit and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920655953.XU CN209692990U (en) | 2019-05-09 | 2019-05-09 | A kind of sound capturing unit and electronic equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209692990U true CN209692990U (en) | 2019-11-26 |
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ID=68608626
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920655953.XU Active CN209692990U (en) | 2019-05-09 | 2019-05-09 | A kind of sound capturing unit and electronic equipment |
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| Country | Link |
|---|---|
| CN (1) | CN209692990U (en) |
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2019
- 2019-05-09 CN CN201920655953.XU patent/CN209692990U/en active Active
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