CN217099489U - Demonstration device for vocal music education that practicality is strong - Google Patents
Demonstration device for vocal music education that practicality is strong Download PDFInfo
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- CN217099489U CN217099489U CN202121384620.1U CN202121384620U CN217099489U CN 217099489 U CN217099489 U CN 217099489U CN 202121384620 U CN202121384620 U CN 202121384620U CN 217099489 U CN217099489 U CN 217099489U
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- 230000001755 vocal effect Effects 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 claims description 2
- 230000005389 magnetism Effects 0.000 abstract description 4
- 239000011521 glass Substances 0.000 abstract description 3
- 210000000214 mouth Anatomy 0.000 description 13
- 239000000428 dust Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000029058 respiratory gaseous exchange Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000001020 rhythmical effect Effects 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 210000001260 vocal cord Anatomy 0.000 description 1
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Abstract
The utility model discloses a presentation device is used in vocal music education that practicality is strong relates to vocal music exercise equipment technical field, include: the device comprises a base, universal wheels, a support rod, a support frame, a demonstration box, a controller, an inner cavity and a magnetic writing board; four corners of the bottom of the base are fixedly connected with universal wheels; the top of the base is fixedly connected with a supporting rod; has the advantages that: the moving block slides in the second sliding groove by pulling the magnetic writing boards, so that the two magnetic writing boards are respectively unfolded from the two sides of the demonstration box, the observation mirror is completely leaked, and a user can observe the mouth shape of the user and correct the mouth shape in time when practicing or demonstrating vocal music through the observation mirror; important knowledge points can be written through the magnetic writing board; when not using, can fold two magnetism clipboards, make two magnetism clipboards pass through the magnetic stripe and adsorb each other and fix, can protect the sight glass simultaneously, prevent to damage.
Description
Technical Field
The utility model relates to a vocal music exercise equipment technical field, concretely relates to presentation device is used in vocal music education that practicality is strong.
Background
Vocal music is a music form singing by using human voice, and mainly takes vocal cords of a person to cooperate with an oral cavity and a tongue to act on breath, so that rhythmic sound is produced, the breathing of the vocal music is an important element in vocal music singing during vocal music exercise, some teachers usually use a demonstration device in order to improve the mastering of students on the breathing method of the vocal music, and students can more intuitively know contents required to be learned through the demonstration device;
however, the existing presentation apparatus has the following problems:
(1) when the existing demonstration device is used, the height of the demonstration device cannot be conveniently adjusted according to the requirements of users with different heights, and the angle of the demonstration device cannot be adjusted according to the watching angle of the user, so that the use flexibility of the demonstration device is reduced;
(2) the mouth shape of a user during pronunciation cannot be observed by the user during vocal music demonstration, errors cannot be corrected timely according to the demonstration device, and the use of the user is affected;
(3) when the existing demonstration device is not used, the display screen is exposed outside, and the protection and the dustproof protection cannot be carried out;
therefore, a demonstration device for vocal music education with strong practicability is provided to solve the problems.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
In order to overcome the defects of the prior art, the demonstration device for vocal music education with strong practicability is provided, so that the problem that the existing demonstration device is inconvenient to adjust the height of the demonstration device according to the requirements of users with different heights when in use, and the demonstration device cannot be adjusted in angle according to the watching angle of the user, so that the use flexibility of the demonstration device is reduced; meanwhile, a user cannot observe the mouth shape of the user during pronunciation during vocal music demonstration, and cannot correct errors timely according to a demonstration device, so that the use of the user is influenced; meanwhile, when the existing demonstration device is not used, the display screen is exposed outside, and the protection and the dust prevention can not be carried out.
(II) technical scheme
The utility model discloses a following technical scheme realizes: the utility model provides a presentation device is used in vocal music education that practicality is strong, include: the device comprises a base, universal wheels, a supporting rod, a supporting frame, a demonstration box, a controller, an inner cavity and a magnetic writing board; four corners of the bottom of the base are fixedly connected with universal wheels; the top of the base is fixedly connected with a supporting rod; the left side and the right side of the supporting rod are both fixedly connected with supporting frames, and the other ends of the supporting frames are both fixedly connected to the upper surface of the base; the top of the supporting rod is movably connected with a demonstration box; the left side of the demonstration box is fixedly connected with a controller; an inner cavity is fixedly connected to one side inside the demonstration box; the front surface of the demonstration box is fixedly connected with two magnetic writing boards;
the bracing piece includes: the device comprises a servo motor I, a threaded screw rod I, a telescopic rod, a threaded sleeve I, a bearing I and a sliding chute I;
the demonstration box comprises: the observation mirror, the sliding groove II, the rotating shaft, the ball and the camera;
the inner cavity includes: a servo motor II, a threaded screw rod II, a bearing II, a sliding rod, a bottom plate, a threaded sleeve II, a sliding block and a display screen;
the magnetic writing board includes: magnetic stripe, movable block.
As a preferred aspect of the present invention, the bottom inside the supporting rod is fixedly connected with a first servo motor; the output end of the top of the servo motor I is fixedly connected with a threaded screw rod I; the inner part of the supporting rod is movably connected with a telescopic rod; the bottom of the telescopic rod is fixedly connected with a first threaded sleeve, and the interior of the first threaded sleeve is movably connected to a first threaded lead screw; the middle of the top of the telescopic rod is fixedly connected with a bearing I; one side of the top of the telescopic rod is fixedly connected with a first sliding groove.
Preferably, the front surface of the demonstration box is fixedly connected with an observation mirror; the upper side and the lower side of the front surface of the demonstration box are fixedly connected with a second sliding groove; the middle of the bottom of the demonstration box is fixedly connected with a rotating shaft, and the rotating shaft is fixedly connected inside an inner ring of a bearing; the left side and the right side of the bottom of the demonstration box are fixedly connected with balls, and the balls are movably connected inside the first sliding groove; the right side of the top of the demonstration box is fixedly connected with a camera.
Preferably, a servo motor II is fixedly connected to the left side of the bottom inside the inner cavity; the output end of the top of the servo motor II is fixedly connected with a threaded screw rod II; the top of the second threaded screw rod is fixedly connected with a second bearing, and the top of the second bearing is fixedly connected to the top inside the inner cavity; a sliding rod is fixedly connected to the right side inside the inner cavity; a bottom plate is movably connected to one side inside the inner cavity; the left side of the bottom plate is fixedly connected with a second threaded sleeve, and the interior of the second threaded sleeve is fixedly connected to a second threaded lead screw; the right side of the bottom plate is fixedly connected with a sliding block, and the inside of the sliding block is movably connected to the sliding rod; the top of the bottom plate is fixedly connected with a display screen.
Preferably, the magnetic writing board is fixedly connected with a magnetic stripe in the middle of the inner side edge; the upper portion and the lower portion of the left side of the magnetic writing board are fixedly connected with moving blocks, and the moving blocks are movably connected inside the sliding grooves II.
As an optimization of the utility model, the controller is electric connection with the first servo motor, the second servo motor, the display screen and the camera.
(3) Advantageous effects
Compared with the prior art, the utility model, following beneficial effect has:
(1) the moving block slides in the second sliding groove by pulling the magnetic writing boards, so that the two magnetic writing boards are respectively unfolded from the two sides of the demonstration box, the observation mirror is completely leaked, and a user can observe the mouth shape of the user and correct the mouth shape in time when practicing or demonstrating vocal music through the observation mirror; important knowledge points can be written through the magnetic writing board; when not using, can fold two magnetism clipboards, make two magnetism clipboards pass through the magnetic stripe and adsorb each other and fix, can protect the sight glass simultaneously, prevent to damage.
(2) The first threaded screw rod is driven to rotate by the first servo motor, so that the first threaded sleeve moves upwards on the first threaded screw rod, and meanwhile, the first threaded sleeve also drives the telescopic rod to move upwards, so that the telescopic rod also drives the demonstration box to move synchronously when moving upwards, and users with different heights can be adapted by adjusting the height of the demonstration box; simultaneously, the demonstration box is shifted to enable the rotating shaft to rotate in the inner ring of the bearing I, and the round ball also rotates in the sliding groove I, so that the demonstration box is driven to rotate, and the angle of the demonstration box can be adjusted according to the watching angle of a user;
(3) the second threaded lead screw is driven by the second servo motor to rotate inside the inner ring of the second bearing, so that the second threaded sleeve moves upwards on the second threaded rod; meanwhile, the sliding block moves upwards on the sliding rod, so that the threaded sleeve II and the sliding rod are simultaneously brought to the bottom plate display screen to move upwards, and the display screen extends out of the inner cavity, so that the display screen can be used for playing vocal music demonstration teaching videos; when need not use the display screen, the display screen is collapsible inside the inner chamber to can protect the display screen, prevent adhesion dust on the display screen simultaneously.
Drawings
FIG. 1 is a front view of the present invention as a whole;
FIG. 2 is a schematic view of the overall development structure of the present invention;
FIG. 3 is a schematic overall sectional structure of the present invention;
FIG. 4 is a left side view cross-sectional structure diagram of the integral demonstration box of the present invention;
fig. 5 is an enlarged schematic structural diagram of the whole fig. 3A of the present invention.
The reference numerals are explained below:
1. a base; 2. a universal wheel; 3. a support bar; 301. a first servo motor; 302. a first threaded lead screw; 303. a telescopic rod; 304. sleeving a first thread; 305. a first bearing; 306. a chute; 4. a support frame; 5. a demonstration box; 501. an observation mirror; 502. a chute; 503. a rotating shaft; 504. a ball; 6. a controller; 7. an inner cavity; 701. a servo motor II; 702. A second threaded lead screw; 703. a second bearing; 704. a slide bar; 705. a base plate; 706. a second thread sleeve; 707. a slider; 708. A display screen; 8. a magnetic writing board; 801. a magnetic strip; 802. moving the mass.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1 to 5, a presentation apparatus for vocal music education having a strong practicability includes: the device comprises a base 1, universal wheels 2, a support rod 3, a support frame 4, a demonstration box 5, a controller 6, an inner cavity 7 and a magnetic writing board 8; four corners of the bottom of the base 1 are fixedly connected with universal wheels 2; the top of the base 1 is fixedly connected with a supporting rod 3; the left side and the right side of the supporting rod 3 are both fixedly connected with a supporting frame 4, and the other end of the supporting frame 4 is both fixedly connected to the upper surface of the base 1; the top of the supporting rod 3 is movably connected with a demonstration box 5; the left side of the demonstration box 5 is fixedly connected with a controller 6; an inner cavity 7 is fixedly connected to one side inside the demonstration box 5; the front surface of the demonstration box 5 is fixedly connected with two magnetic writing boards 8;
the support rod 3 includes: the device comprises a servo motor I301, a threaded screw rod I302, an expansion rod 303, a threaded sleeve I304, a bearing I305 and a sliding groove I306;
the presentation case 5 includes: a sight glass 501, a second chute 502, a rotating shaft 503, a round ball 504 and a camera 505;
the inner chamber 7 includes: a second servo motor 701, a second threaded lead screw 702, a second bearing 703, a sliding rod 704, a bottom plate 705, a second threaded sleeve 706, a sliding block 707 and a display screen 708;
the magnetic writing board 8 includes: magnetic strip 801, moving block 802.
In this embodiment, the bottom inside the support rod 3 is fixedly connected with a first servo motor 301; the output end of the top of the servo motor I301 is fixedly connected with a threaded screw rod I302; the inside of the support rod 3 is movably connected with a telescopic rod 303; the bottom of the telescopic rod 303 is fixedly connected with a first threaded sleeve 304, and the interior of the first threaded sleeve 304 is movably connected to a first threaded lead screw 302; the middle of the top of the telescopic rod 303 is fixedly connected with a bearing I305; one side of the top of the telescopic rod 303 is fixedly connected with a first sliding groove 306.
During the specific use, drive a screw thread lead screw 302 through servo motor 301 and rotate, make a thread bush 304 rebound on a screw thread lead screw 302, the telescopic link 303 rebound is also driven to a thread bush 304 simultaneously, when making telescopic link 303 rebound, also drives demonstration case 5 synchronous motion simultaneously, through the altitude mixture control of demonstration case 5 to can adapt to the user of different heights.
In this embodiment, the front surface of the demonstration box 5 is fixedly connected with an observation mirror 501; the upper and lower sides of the front surface of the demonstration box 5 are fixedly connected with a second sliding chute 502; the middle of the bottom of the demonstration box 5 is fixedly connected with a rotating shaft 503, and the rotating shaft 503 is fixedly connected inside an inner ring of the bearing I305; the left side and the right side of the bottom of the demonstration box 5 are both fixedly connected with round balls 504, and the round balls 504 are both movably connected inside the first sliding groove 306; a camera 505 is fixedly connected to the right side of the top of the demonstration box 5.
When the mouth-shape correction device is used specifically, the observation mirror 501 enables a user to observe the mouth shape of the user when practicing or demonstrating vocal music, and correct the mouth shape in time;
by shifting the demonstration box 5, the rotating shaft 503 rotates inside the inner ring of the bearing I305, and meanwhile, the round ball 504 also rotates inside the sliding groove I306, so that the demonstration box 5 is driven to rotate, and the angle of the demonstration box 5 can be adjusted according to the watching angle of a user;
mouth shape when can be with user's exercise through camera 505 is recorded, and follow-up accessible display screen 708 is played out, can carry out the comparison before and after the exercise textbook.
In the embodiment, the left side of the bottom inside the inner cavity 7 is fixedly connected with a second servo motor 701; the output end of the top of the second servo motor 701 is fixedly connected with a second threaded lead screw 702; the top of the second threaded screw 702 is fixedly connected with a second bearing 703, and the top of the second bearing 703 is fixedly connected to the top inside the inner cavity 7; a sliding rod 704 is fixedly connected to the right side inside the inner cavity 7; a bottom plate 705 is movably connected to one side inside the inner cavity 7; the left side of the bottom plate 705 is fixedly connected with a second threaded sleeve 706, and the interior of the second threaded sleeve 706 is fixedly connected to a second threaded lead screw 702; a sliding block 707 is fixedly connected to the right side of the bottom plate 705, and the inside of the sliding block 707 is movably connected to the sliding rod 704; a display 708 is fixedly connected to the top of the bottom plate 705.
When the screw rod II is used, the second servo motor 701 drives the second threaded screw rod 702 to rotate inside the inner ring of the second bearing 703, so that the second threaded sleeve 706 moves upwards on the second threaded rod 702; meanwhile, the sliding block 707 moves upwards on the sliding rod 707, so that the threaded sleeve II 706 and the sliding rod 707 simultaneously bring the display screen 708 of the bottom plate 705 to move upwards, and the display screen 708 extends out of the inner cavity 7, so that the display screen 708 can be used for playing vocal music demonstration teaching videos; when the display 708 is not needed, the display 708 may be retracted inside the interior cavity 7, thereby protecting the display 708 while preventing dust from adhering to the display 708.
In this embodiment, the magnetic strips 801 are fixedly connected to the middle of the inner side edges of the magnetic writing board 8; the upper and lower equal fixedly connected with movable block 802 in magnetic clipboard 8 left side, and the equal swing joint of movable block 802 is inside two 502 spouts of spout.
When the demonstration box is used specifically, the moving block 802 slides in the second sliding groove 502 by pulling the magnetic writing boards 8, so that the two magnetic writing boards 8 are respectively unfolded from the two sides of the demonstration box 5, the observation mirror 501 is completely leaked, and important knowledge points can be written through the magnetic writing boards 8; when not in use, the two magnetic writing boards 8 can be folded to enable the two magnetic writing boards 8 to be fixed through mutual adsorption of the magnetic strips 801, and meanwhile, the observation mirror 501 can be protected to prevent damage.
In this embodiment, the controller 6 is electrically connected to the first servo motor 301, the second servo motor 701, the display screen 708, and the camera 505.
During specific use, the controller 6 can control the working states of the first servo motor 301, the second servo motor 701, the display screen 708 and the camera 505.
The utility model provides a demonstration device for vocal music education that practicality is strong's theory of operation:
firstly, connecting a controller 6, a first servo motor 301, a second servo motor 701, a display screen 708 and a camera 505 with a power supply, and controlling the working states of the first servo motor 301, the second servo motor 701, the display screen 708 and the camera 505 through the controller 6;
when the demonstration box is used, the moving block 802 slides in the second sliding groove 502 by pulling the magnetic writing boards 8, so that the two magnetic writing boards 8 are respectively unfolded from the two sides of the demonstration box 5, the observation mirror 501 is completely leaked, and a user can observe the mouth shape of the user and correct the mouth shape in time when practicing or demonstrating vocal music through the observation mirror 501; important knowledge points can be written through the magnetic writing board 8; when the magnetic writing board is not used, the two magnetic writing boards 8 can be folded, so that the two magnetic writing boards 8 are mutually adsorbed and fixed through the magnetic strips 801, and meanwhile, the observation mirror 501 can be protected to prevent damage;
meanwhile, a second threaded lead screw 702 is driven to rotate inside an inner ring of a second bearing 703 through a second servo motor 701, so that a second threaded sleeve 706 moves upwards on the second threaded rod 702; meanwhile, the sliding block 707 moves upwards on the sliding rod 707, so that the threaded sleeve II 706 and the sliding rod 707 simultaneously bring the display screen 708 of the bottom plate 705 to move upwards, and the display screen 708 extends out of the inner cavity 7, so that the display screen 708 can be used for playing vocal music demonstration teaching videos; when the display 708 is not needed, the display 708 may be retracted inside the interior cavity 7, thereby protecting the display 708 while preventing dust from adhering to the display 708;
meanwhile, the mouth shape of the user during exercise can be recorded by the camera 505 and subsequently played through the display screen 708, so that the user can compare the mouth shape with the mouth shape before and after the exercise teaching material;
meanwhile, the first servo motor 301 drives the first threaded lead screw 302 to rotate, so that the first threaded sleeve 304 moves upwards on the first threaded lead screw 302, and meanwhile, the first threaded sleeve 304 also drives the telescopic rod 303 to move upwards, so that the telescopic rod 303 also drives the demonstration box 5 to synchronously move when moving upwards, and the demonstration box 5 can adapt to users with different heights by adjusting the height of the demonstration box 5;
meanwhile, the demonstration box 5 is shifted to enable the rotating shaft 503 to rotate inside the inner ring of the bearing I305, and meanwhile, the round ball 504 also rotates inside the sliding groove I306, so that the demonstration box 5 is driven to rotate, and the angle of the demonstration box 5 can be adjusted according to the watching angle of a user.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention and are not intended to limit the spirit and scope of the present invention. Without departing from the design concept of the present invention, various modifications and improvements made by the technical solution of the present invention by those skilled in the art should fall into the protection scope of the present invention, and the technical contents claimed by the present invention have been fully recorded in the claims.
Claims (2)
1. A presentation device for vocal music education that practicality is strong includes: the device comprises a base (1), universal wheels (2), supporting rods (3), a supporting frame (4), a demonstration box (5), a controller (6), an inner cavity (7) and a magnetic writing board (8); the method is characterized in that: four corners of the bottom of the base (1) are fixedly connected with universal wheels (2); the top of the base (1) is fixedly connected with a supporting rod (3); the left side and the right side of the supporting rod (3) are both fixedly connected with a supporting frame (4), and the other end of the supporting frame (4) is both fixedly connected to the upper surface of the base (1); the top of the supporting rod (3) is movably connected with a demonstration box (5); the left side of the demonstration box (5) is fixedly connected with a controller (6); an inner cavity (7) is fixedly connected to one side inside the demonstration box (5); the front surface of the demonstration box (5) is fixedly connected with two magnetic writing boards (8);
the support rod (3) comprises: the device comprises a servo motor I (301), a threaded screw rod I (302), an expansion rod (303), a threaded sleeve I (304), a bearing I (305) and a sliding groove I (306);
the presentation case (5) comprises: the device comprises an observation mirror (501), a second chute (502), a rotating shaft (503), a round ball (504) and a camera (505);
the inner cavity (7) comprises: a second servo motor (701), a second threaded lead screw (702), a second bearing (703), a sliding rod (704), a bottom plate (705), a second threaded sleeve (706), a sliding block (707) and a display screen (708);
the magnetic writing board (8) comprises: a magnetic strip (801) and a moving block (802);
the bottom inside the supporting rod (3) is fixedly connected with a first servo motor (301); the output end of the top of the servo motor I (301) is fixedly connected with a threaded screw rod I (302); a telescopic rod (303) is movably connected inside the supporting rod (3); the bottom of the telescopic rod (303) is fixedly connected with a first threaded sleeve (304), and the interior of the first threaded sleeve (304) is movably connected to a first threaded lead screw (302); the middle of the top of the telescopic rod (303) is fixedly connected with a first bearing (305); one side of the top of the telescopic rod (303) is fixedly connected with a first sliding groove (306);
the front surface of the demonstration box (5) is fixedly connected with an observation mirror (501); the upper and lower sides of the front surface of the demonstration box (5) are fixedly connected with a second sliding groove (502); the middle of the bottom of the demonstration box (5) is fixedly connected with a rotating shaft (503), and the rotating shaft (503) is fixedly connected inside an inner ring of the first bearing (305); the left side and the right side of the bottom of the demonstration box (5) are fixedly connected with round balls (504), and the round balls (504) are movably connected inside the first sliding groove (306); a camera (505) is fixedly connected to the right side of the top of the demonstration box (5);
a second servo motor (701) is fixedly connected to the left side of the bottom inside the inner cavity (7); the output end of the top of the second servo motor (701) is fixedly connected with a second threaded lead screw (702); the top of the second threaded lead screw (702) is fixedly connected with a second bearing (703), and the top of the second bearing (703) is fixedly connected to the top inside the inner cavity (7); a sliding rod (704) is fixedly connected to the right side inside the inner cavity (7); a bottom plate (705) is movably connected to one side inside the inner cavity (7); a second threaded sleeve (706) is fixedly connected to the left side of the bottom plate (705), and the interior of the second threaded sleeve (706) is fixedly connected to a second threaded lead screw (702); the right side of the bottom plate (705) is fixedly connected with a sliding block (707), and the inside of the sliding block (707) is movably connected to the sliding rod (704); the top of the bottom plate (705) is fixedly connected with a display screen (708);
the middle of the inner side edge of the magnetic writing board (8) is fixedly connected with a magnetic strip (801); and the upper part and the lower part of the left side of the magnetic writing board (8) are fixedly connected with moving blocks (802), and the moving blocks (802) are movably connected inside the second sliding groove (502).
2. A presentation apparatus for vocal music education having a strong practicability according to claim 1, characterized in that: the controller (6) is electrically connected with the first servo motor (301), the second servo motor (701), the display screen (708) and the camera (505).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121384620.1U CN217099489U (en) | 2021-06-22 | 2021-06-22 | Demonstration device for vocal music education that practicality is strong |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121384620.1U CN217099489U (en) | 2021-06-22 | 2021-06-22 | Demonstration device for vocal music education that practicality is strong |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217099489U true CN217099489U (en) | 2022-08-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121384620.1U Expired - Fee Related CN217099489U (en) | 2021-06-22 | 2021-06-22 | Demonstration device for vocal music education that practicality is strong |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217099489U (en) |
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2021
- 2021-06-22 CN CN202121384620.1U patent/CN217099489U/en not_active Expired - Fee Related
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