CN213032525U - A compress tightly sealing device for micro-fluidic chip - Google Patents
A compress tightly sealing device for micro-fluidic chip Download PDFInfo
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- CN213032525U CN213032525U CN202021394294.8U CN202021394294U CN213032525U CN 213032525 U CN213032525 U CN 213032525U CN 202021394294 U CN202021394294 U CN 202021394294U CN 213032525 U CN213032525 U CN 213032525U
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Abstract
The embodiment of the application discloses a compress tightly sealing device for micro-fluidic chip to the cam realizes the up-and-down motion of pressure head as first driving piece, realizes the seesaw of chip slide with the crank as the second driving piece, forms synchronous drive spare through rocker, first band pulley and second band pulley, utilizes the upper cover to rotate the motion of opening and shutting from top to bottom to drive first driving piece and second driving piece in step. The sealing device disclosed by the application integrates two sets of motion mechanisms, and the front and back motion of the chip and the up and down motion of the pressure head are simultaneously realized by using single execution power for rotating the upper cover.
Description
Technical Field
The application relates to the technical field of microfluidic chips, in particular to a compressing and sealing device for a microfluidic chip.
Background
Microfluidic chips (microfluidic chips) are a hot spot area for the development of current micro Total Analysis Systems (minidesigned Total Analysis Systems). In recent years, the microfluidic chip technology, as a novel analysis platform, has the advantages of miniaturization, automation, integration, convenience, rapidness and the like, and has been widely researched and applied in many fields, such as cell biology, analytical chemistry, environmental monitoring and protection, judicial identification, drug synthesis screening, materials science, tissue engineering and the like.
At present, the assembly and sealing of the microfluidic chip are usually completed by two sets of motion mechanisms, namely a front-back motion mechanism of the chip and an up-down motion mechanism of a pressure head. Two sets of motion mechanisms need two actuating powers and are difficult to integrate.
SUMMERY OF THE UTILITY MODEL
An object of the embodiment of this application is to provide a compress tightly sealing device for micro-fluidic chip for solve the assembly of current micro-fluidic chip and seal the technical problem that is difficult to integrate.
In order to achieve the purpose of the application, the technical scheme adopted by the application is as follows:
the present application provides a compression sealing device for a microfluidic chip, the compression sealing device comprising: the chip pressing device comprises a bottom plate, an upper cover, a chip sliding plate, a chip pressing piece, a first driving piece, a second driving piece, a synchronous transmission piece and a supporting piece, wherein the upper cover is arranged on the bottom plate in a vertically rotating opening and closing manner, the chip sliding plate is used for placing a chip, the chip pressing piece presses the chip to the chip sliding plate, the first driving piece drives the chip pressing piece to move vertically, the second driving piece drives the chip sliding plate to move back and forth on the bottom plate, the synchronous transmission piece synchronously drives the first driving piece and the second driving piece through the opening and closing movement of the upper cover, and; the chip sliding plate is installed on a linear guide rail of the bottom plate, the chip pressing piece is installed below the upper end portion of the supporting piece, the first driving piece is installed on the side portion of the supporting piece, the second driving piece is installed on the bottom plate, and the synchronous transmission piece is installed on the inner side of the side edge of the upper cover.
Further, the chip pressing member includes: the pressure head, the pressure head mounting plate and the pressure spring are arranged on the pressure head; the pressure head install in the pressure head mounting panel is followed stretch out below the pressure head mounting panel, be located on the pressure head mounting panel the pressure head both sides are provided with the pressure spring respectively, the pressure spring upper end is connected to below the upper end of support piece.
Preferably, be provided with at least a set of pressure head under the pressure head mounting panel side by side, be provided with the chip on the chip slide and place the piece with every group pressure head corresponding position, every chip is placed the piece and is placed a pressure head.
Preferably, be close to on the pressure head mounting panel the outside of pressure spring is equipped with the guiding hole, the cover is equipped with the guiding axle in the guiding hole, the upper end and the lower extreme of guiding axle install respectively extremely support piece's upper end with the bottom plate.
Further, the first driver includes: two cams, every cam through first pivot install in support piece's lateral part is inboard, the cam has gradual change outline and forms long profile line surface and short profile line surface, the pressure spring is in compression state always makes the outline surface of cam with the outer end lower surface of pressure head mounting panel pastes tightly, the cam follows first pivot rotates, when short profile line surface is upwards, the spring force of pressure spring makes the pressure head mounting panel drive the pressure head is followed the guiding axle downstream, when long profile line surface is upwards, the cam promotes the pressure head mounting panel drives the pressure head is followed the guiding axle upstream.
Further, the second driver includes: the first end of the crank is connected to a second rotating shaft, two ends of the second rotating shaft are mounted on the bottom plate through supporting plates and are parallel to the first rotating shaft, the second end, far away from the second rotating shaft, of the crank is connected to the rear side of the chip sliding plate, the crank rotates along with the second rotating shaft, and when the rotating direction of the second end of the crank is forward, the crank drives the chip sliding plate to move forward along the linear guide rail; when the second end of the crank rotates backwards, the crank drives the chip sliding plate to move backwards along the linear guide rail.
Preferably, the second end of the crank is connected to the rear side of the chip sliding plate through a connecting rod, and when the second end of the crank rotates to the front direction, the crank drives the chip sliding plate to move forwards along the linear guide rail through the connecting rod; when the second end of the crank rotates backwards, the crank drives the chip sliding plate to move backwards along the linear guide rail through the connecting rod.
Further, the synchromesh transmission comprises: the upper end of the rocker is mounted in a slide way on the inner side of the upper cover through a pulley, the lower end of the rocker and the first belt pulley are mounted to the outer side, passing through the side part of the support, of the first rotating shaft, the lower end of the rocker is located on the outer side of the first belt pulley, the second belt pulley is mounted on the outer side of the second rotating shaft, and the first belt pulley and the second belt pulley are connected through a synchronous belt; the upper cover is pulled upwards, the pulley moves backwards along the slide way, the upper cover drives the first rotating shaft to rotate in a first direction through the rocker, the first rotating shaft drives the cam and the first belt pulley to rotate in the first direction simultaneously, the cam drives the pressure head to move upwards through the pressure head mounting plate, the first belt pulley drives the second belt pulley to rotate in the first direction through the synchronous belt, the second belt pulley drives the crank to rotate in the first direction through the second rotating shaft, and the crank drives the chip sliding block to move forwards to a chip assembling position; the upper cover is covered downwards, the pulley is followed the slide moves forward, the upper cover passes through the rocker drives first pivot to with first opposite direction's second direction rotates, first pivot drives simultaneously the cam with first band pulley rotates to the second direction simultaneously, first band pulley warp the hold-in range drives the second band pulley rotates to the second direction, the second band pulley passes through the second pivot drives the crank and rotates to the second direction, the crank drives the chip slider backward motion to the initial position that compresses tightly, the cam passes through the pressure head mounting panel drives the pressure head downstream, the pressure head compresses tightly on the seal ring of chip.
Preferably, a crank rotation opening is formed in the bottom plate below the crank.
Preferably, a handle is arranged on the front side of the upper cover.
Compared with the prior art, the embodiment of the application uses the cam as the first driving part to realize the up-and-down motion of the pressure head, uses the crank as the second driving part to realize the front-and-back motion of the chip sliding plate, forms a synchronous driving part through the rocker, the first belt wheel and the second belt wheel, and synchronously drives the first driving part and the second driving part by utilizing the up-and-down rotation opening and closing motion of the upper cover. The sealing device disclosed by the application integrates two sets of motion mechanisms, and the front and back motion of the chip and the up and down motion of the pressure head are simultaneously realized by using single execution power for rotating the upper cover.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. Some specific embodiments of the present application will be described in detail hereinafter by way of illustration and not limitation with reference to the accompanying drawings. The same reference numbers will be used throughout the drawings to refer to the same or like parts or portions, and it will be understood by those skilled in the art that the drawings are not necessarily drawn to scale, in which:
fig. 1 is a schematic overall structure diagram of a compression sealing device for a microfluidic chip disclosed in an embodiment of the present application;
fig. 2 is another overall structural diagram of a compression sealing device for a microfluidic chip disclosed in an embodiment of the present application;
fig. 3 is a schematic structural diagram of a pressing and sealing device for a microfluidic chip, which is disclosed in an embodiment of the present application, for implementing up-and-down movement of a pressing head;
fig. 4 is a schematic structural diagram of a chip slide plate for implementing back-and-forth movement of a compression sealing device for a microfluidic chip disclosed in an embodiment of the present application.
Detailed Description
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the assembly and sealing of the existing microfluidic chip, the front and back movement of the chip and the up and down movement of a pressure head need two execution powers, and the integration is difficult.
In order to solve the above technical problem, as shown in fig. 1 and 2, an embodiment of the present application discloses a compression sealing device for a microfluidic chip, including: bottom plate 1, upper cover 2, chip slide 3, the chip compresses tightly piece 4, first driving piece 5, second driving piece 6, synchronous drive spare 7 and support piece 8, 2 rear sides of upper cover are installed to bottom plate 1 rear sides through self rotation axis 21, upper cover 2 is established to bottom plate 1 around rotation axis 21 upper and lower rotatory switching cover, chip slide 3 is used for placing chip 9, chip compresses tightly piece 4 and is used for compressing tightly chip 9, synchronous drive spare 7 drives first driving piece 5 and second driving piece 6 through 2 switching motions of upper cover, first driving piece 5 drives the chip and compresses tightly a up-and-down motion, second driving piece 6 drives chip slide 3 seesaw on bottom plate 1.
Referring to fig. 4, a linear guide rail 11 is installed on the bottom plate 1, the chip slide plate 3 is installed on the linear guide rail 11 and moves back and forth along the linear guide rail 11, a chip placing block 31 is arranged on the chip slide plate 3, the chip placing block 31 is used for placing a chip 9, and the chip 9 is placed in a chip placing groove formed in the chip placing block 31.
Referring to fig. 1 and 2, the supporting member 8 includes an upper end portion 81 and a side portion 82, both ends of the upper end portion 81 are mounted on the base plate 1 in parallel through the side portion 82, and a receiving cavity is formed between the upper end portion 81, the side portion 82 and the base plate 1. The linear guide 11 and the chip sled 3 are arranged between the two side portions 82, preferably the linear guide 11 and the chip sled 3 are arranged in the middle between the two side portions 82.
Referring to fig. 1 to 3, the chip pressing member 4 is mounted under the upper end portion 81 of the support member 8, and preferably, the chip pressing member 4 is located at a middle position under the upper end portion 81. Further, the chip pressing member 4 includes: a pressure head 41, a pressure head mounting plate 42 and a pressure spring 43; the pressure head 41 is mounted on the pressure head mounting plate 42 and extends out from the lower side of the pressure head mounting plate 42, the pressure head mounting plate 42 is provided with a pressure spring 43 on each side of the pressure head 41, and the upper end of the pressure spring 43 is connected to the lower side of the upper end 81 of the support member 8.
Preferably, at least one set of the pressing heads 41 is juxtaposed under the pressing head mounting plate 42, for example, as shown in fig. 1 to 3, the pressing heads 41 are divided into three sets of two, the chip placing block 31 is provided on the chip slide plate 3 at a position corresponding to each set of the pressing heads 41, and one pressing head is placed on each chip placing plate 31.
Preferably, referring to fig. 1 to 3, the ram mounting plate 42 is provided with a guide hole (not shown) on the outer side thereof adjacent to the compression spring 43, the ram mounting plate 42 is sleeved with a guide shaft 44 through the guide hole, and the upper end and the lower end of the guide shaft 44 are respectively mounted to the upper end portion 81 of the support member 8 and the base plate 1.
Referring to fig. 1 to 3, the first driver 5 is mounted to the side portion 82 of the support member 8, the first driver 5 including: and two cams 51, each cam 51 is arranged on the inner side of the side part 82 of the support member 8 through a first rotating shaft 52, the cam 82 has a gradually changed outer contour and forms a long contour line surface and a short contour line surface, the pressure spring 43 is always in a compressed state to enable the outer contour surface of the cam 51 to be attached to the lower surface of the outer end of the pressure head mounting plate 42, and the cam 51 rotates along with the first rotating shaft 52 and drives the pressure head mounting plate 42 and the pressure head 41 to move up and down.
Referring to fig. 4, the second driver 6 is mounted to the base plate 1, the second driver 6 comprising: the first end of the crank 61 is connected to the second rotating shaft 62, the two ends of the second rotating shaft 62 are mounted on the bottom plate 1 through the supporting plate 63 and are parallel to the first rotating shaft 52, the second end of the crank 61, which is far away from the second rotating shaft 62, is connected to the rear side of the chip sliding plate 3, preferably, the second end of the crank 61 is connected to the middle of the rear side of the chip sliding plate 3, and the crank 61 rotates along with the second rotating shaft 62 and drives the chip sliding plate 3 to move back and forth.
Referring to fig. 4, preferably, the second end of the crank 61 is connected to the rear side of the chip slide 3 through a connecting rod 64, the crank 61 indirectly drives the chip slide 3 to move back and forth through the connecting rod 64, and the length of the crank 61 is reduced through the connecting rod 64, so that the crank 61 is more flexible. In addition, the distance between the crank 61 and the second rotating shaft 62 and the chip slide 3 is also increased.
Referring to fig. 4, it is more preferable that a crank rotation opening 65 is formed on the bottom plate 1 below the crank 61, so that the crank 61 can rotate 360 ° around the second rotation shaft 62, when the second end of the crank 61 rotates to the lower side, the crank 61 can be prevented from touching the bottom plate 1 through the crank rotation opening 65, and in addition, the height of the support plate 63 can be reduced.
Referring to fig. 1, 2 and 4, a timing transmission 7 is installed inside a side edge of the upper cover 2, and further, the timing transmission 7 includes: the upper end of the rocker 71 is mounted in a slide way 75 on the inner side of the upper cover 2 through a pulley 74, the lower end of the rocker 71 and the first pulley 72 are mounted on the outer side of a side portion 82 of the first rotating shaft 52 penetrating through the support 8, the lower end of the rocker 71 is positioned on the outer side of the first pulley 72, the second pulley 73 is mounted on the outer side of the second rotating shaft 62, and the first pulley 72 and the second pulley 73 are connected through a timing belt 76. The synchronous transmission member 7 drives the first pulley 72 through the rocker 71, and simultaneously the first pulley 72 drives the second pulley 73 through the synchronous belt 76. In the present embodiment, the first pulley 72 and the second pulley 73 are pulleys having different sizes, for example, as shown in fig. 1, the first pulley 72 is a large pulley, and the second pulley 73 is a small pulley.
Preferably, referring to fig. 1 and 2, a handle 22 is provided at a front side of the upper cover 2, and the upper cover 2 is conveniently lifted up or down to cover the upper cover 2 by using the handle 22.
The process for simultaneously realizing the front and back movement of the chip and the up and down movement of the pressure head by using the single execution power of the rotating upper cover for the compression sealing device for the microfluidic chip disclosed in the embodiment of the application is specifically as follows:
the upper cover 2 is pulled up, the pulley 74 moves backward along the slide way 75, the upper cover 2 drives the first rotating shaft 52 to rotate in the first direction through the rocker 71, and the first rotating shaft 52 simultaneously drives the cam 51 and the first belt pulley 72 to rotate in the first direction. When the long-profile surface of the cam 72 is turned upward, the cam 72 pushes the ram mounting plate 42 to move the ram 41 upward along the guide shaft 44. The first belt wheel 72 drives the second belt wheel 73 to rotate towards the first direction through the synchronous belt 76, the second belt wheel 73 drives the crank 61 to rotate towards the first direction through the second rotating shaft 62, and when the second end of the crank 61 rotates towards the front, the crank 61 drives the chip sliding plate 3 to move forwards to the chip assembling position along the linear guide rail 11 so as to install the chip 9; alternatively, when the second end of the crank 61 is turned to the forward direction, the crank 61 drives the chip slide 3 to move forward along the linear guide 11 to the chip mounting position through the connecting rod 64, so as to mount the chip 9.
Conversely, when the upper cover 2 is closed downwards, the pulley 74 moves forward along the slideway 75, the upper cover 2 drives the first rotating shaft 52 to rotate in a second direction opposite to the first direction through the rocker 71, and the first rotating shaft 52 simultaneously drives the cam 51 and the first belt pulley 72 to rotate in the second direction. The first belt pulley 72 drives the second belt pulley 73 to rotate towards the second direction through the synchronous belt 76, the second belt pulley 73 drives the crank 61 to rotate towards the second direction through the second rotating shaft 62, and when the second end of the crank 61 rotates towards the rear direction, the crank 61 drives the chip sliding plate 3 to move backwards along the linear guide rail 11 to the initial compression position; alternatively, when the second end of the crank 61 is turned to the backward direction, the crank 61 drives the chip slide 3 to move backward along the linear guide 11 by the connecting rod 64 to the initial pressing position. Meanwhile, when the surface of the short contour line of the cam 72 turns upward, the spring force of the compression spring 43 causes the pressure head mounting plate 42 to drive the pressure head 41 to move downward along the guide shaft 44, and the pressure head 41 presses the seal ring 91 of the chip 9.
Compared with the prior art, the embodiment of the application uses the cam as the first driving part to realize the up-and-down motion of the pressure head, uses the crank as the second driving part to realize the front-and-back motion of the chip sliding plate, forms a synchronous driving part through the rocker, the first belt wheel and the second belt wheel, and synchronously drives the first driving part and the second driving part by utilizing the up-and-down rotation opening and closing motion of the upper cover. The sealing device disclosed by the application integrates two sets of motion mechanisms, and the front and back motion of the chip and the up and down motion of the pressure head are simultaneously realized by using single execution power for rotating the upper cover.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.
Claims (10)
1. A pinch seal device for a microfluidic chip, the pinch seal device comprising: the chip pressing device comprises a bottom plate, an upper cover, a chip sliding plate, a chip pressing piece, a first driving piece, a second driving piece, a synchronous transmission piece and a supporting piece, wherein the upper cover is arranged on the bottom plate in a vertically rotating opening and closing manner, the chip sliding plate is used for placing a chip, the chip pressing piece presses the chip to the chip sliding plate, the first driving piece drives the chip pressing piece to move vertically, the second driving piece drives the chip sliding plate to move back and forth on the bottom plate, the synchronous transmission piece synchronously drives the first driving piece and the second driving piece through the opening and closing movement of the upper cover, and; the chip sliding plate is installed on a linear guide rail of the bottom plate, the chip pressing piece is installed below the upper end portion of the supporting piece, the first driving piece is installed on the side portion of the supporting piece, the second driving piece is installed on the bottom plate, and the synchronous transmission piece is installed on the inner side of the side edge of the upper cover.
2. The compression sealing device for the microfluidic chip according to claim 1, wherein the chip compression member comprises: the pressure head, the pressure head mounting plate and the pressure spring are arranged on the pressure head; the pressure head install in the pressure head mounting panel is followed stretch out below the pressure head mounting panel, be located on the pressure head mounting panel the pressure head both sides are provided with the pressure spring respectively, the pressure spring upper end is connected to below the upper end of support piece.
3. The pressing and sealing device for the microfluidic chip as claimed in claim 2, wherein at least one group of pressing heads is arranged below the pressing head mounting plate in parallel, and chip placing blocks are arranged on the chip sliding plate at positions corresponding to each group of pressing heads, and each chip placing block is used for placing one pressing head.
4. The pressing and sealing device for the microfluidic chip according to claim 2 or 3, wherein a guide hole is formed in the pressure head mounting plate on the outer side of the pressure spring, a guide shaft is sleeved in the guide hole, and the upper end and the lower end of the guide shaft are respectively mounted to the upper end of the support member and the bottom plate.
5. The compression sealing device for the microfluidic chip according to claim 4, wherein the first driver comprises: two cams, every cam through first pivot install in support piece's lateral part is inboard, the cam has gradual change outline and forms long profile line surface and short profile line surface, the pressure spring is in compression state always makes the outline surface of cam with the outer end lower surface of pressure head mounting panel pastes tightly, the cam follows first pivot rotates, when short profile line surface is upwards, the spring force of pressure spring makes the pressure head mounting panel drive the pressure head is followed the guiding axle downstream, when long profile line surface is upwards, the cam promotes the pressure head mounting panel drives the pressure head is followed the guiding axle upstream.
6. The compression sealing device for the microfluidic chip according to claim 5, wherein the second driving member comprises: the first end of the crank is connected to a second rotating shaft, two ends of the second rotating shaft are mounted on the bottom plate through supporting plates and are parallel to the first rotating shaft, the second end, far away from the second rotating shaft, of the crank is connected to the rear side of the chip sliding plate, the crank rotates along with the second rotating shaft, and when the rotating direction of the second end of the crank is forward, the crank drives the chip sliding plate to move forward along the linear guide rail; when the second end of the crank rotates backwards, the crank drives the chip sliding plate to move backwards along the linear guide rail.
7. The compression sealing device for the microfluidic chip as claimed in claim 6, wherein the second end of the crank is connected to the rear side of the chip sliding plate through a connecting rod, and when the second end of the crank is turned to the forward direction, the crank drives the chip sliding plate to move forward along the linear guide rail through the connecting rod; when the second end of the crank rotates backwards, the crank drives the chip sliding plate to move backwards along the linear guide rail through the connecting rod.
8. The pressure sealing device for the microfluidic chip according to claim 6 or 7, wherein the synchronous transmission member comprises: the upper end of the rocker is mounted in a slide way on the inner side of the upper cover through a pulley, the lower end of the rocker and the first belt pulley are mounted to the outer side, passing through the side part of the support, of the first rotating shaft, the lower end of the rocker is located on the outer side of the first belt pulley, the second belt pulley is mounted on the outer side of the second rotating shaft, and the first belt pulley and the second belt pulley are connected through a synchronous belt; the upper cover is pulled upwards, the pulley moves backwards along the slide way, the upper cover drives the first rotating shaft to rotate in a first direction through the rocker, the first rotating shaft drives the cam and the first belt pulley to rotate in the first direction simultaneously, the cam drives the pressure head to move upwards through the pressure head mounting plate, the first belt pulley drives the second belt pulley to rotate in the first direction through the synchronous belt, the second belt pulley drives the crank to rotate in the first direction through the second rotating shaft, and the crank drives the chip sliding block to move forwards to a chip assembling position; the upper cover is covered downwards, the pulley is followed the slide moves forward, the upper cover passes through the rocker drives first pivot to with first opposite direction's second direction rotates, first pivot drives simultaneously the cam with first band pulley rotates to the second direction simultaneously, first band pulley warp the hold-in range drives the second band pulley rotates to the second direction, the second band pulley passes through the second pivot drives the crank and rotates to the second direction, the crank drives the chip slider backward motion to the initial position that compresses tightly, the cam passes through the pressure head mounting panel drives the pressure head downstream, the pressure head compresses tightly on the seal ring of chip.
9. The compression sealing device for the microfluidic chip as claimed in claim 6, wherein a bottom plate below the crank is provided with a crank rotation opening.
10. The compression sealing device for the microfluidic chip according to claim 1, wherein a handle is provided on the front side of the upper cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021394294.8U CN213032525U (en) | 2020-07-15 | 2020-07-15 | A compress tightly sealing device for micro-fluidic chip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021394294.8U CN213032525U (en) | 2020-07-15 | 2020-07-15 | A compress tightly sealing device for micro-fluidic chip |
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| Publication Number | Publication Date |
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| CN213032525U true CN213032525U (en) | 2021-04-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202021394294.8U Active CN213032525U (en) | 2020-07-15 | 2020-07-15 | A compress tightly sealing device for micro-fluidic chip |
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| CN (1) | CN213032525U (en) |
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