CN211242515U - Deformable table plate and learning table applying same - Google Patents
Deformable table plate and learning table applying same Download PDFInfo
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- CN211242515U CN211242515U CN201921876166.4U CN201921876166U CN211242515U CN 211242515 U CN211242515 U CN 211242515U CN 201921876166 U CN201921876166 U CN 201921876166U CN 211242515 U CN211242515 U CN 211242515U
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Abstract
The utility model relates to a children household articles technical field, specifically speaking relates to a study table of flexible table and applied flexible table. The deformable table plate comprises a table top plate, a elbow supporting plate, a top plate mechanism and an electric telescopic mechanism, wherein the elbow supporting plate can freely extend out of the front side of the table top plate and can be folded to the bottom of the table top plate, the top plate mechanism drives the elbow supporting plate to lift, and the electric telescopic mechanism drives the elbow supporting plate to move back and forth. The learning table applying the deformable table plate comprises a table plate and table legs for supporting the table plate, wherein the table plate adopts the deformable table plate. The utility model realizes the automatic folding and storage of the desk plate of the learning desk, reduces the occupied space when the learning desk is not used, and is beneficial to the reasonable utilization of the space; moreover, the electric control of the keys is adopted, so that the safety of the young children in independent operation is ensured.
Description
Technical Field
The utility model relates to a children household articles technical field, specifically speaking relates to a study table of flexible table and applied flexible table.
Background
The learning table is a novel, scientific, humanized and practical learning auxiliary tool, and can cultivate good writing sitting postures of children. The existing learning table plate occupies a large space, the time for children to use the learning table is limited, and the learning table plate occupies a large space when not in use, so that the reasonable utilization of the space is not facilitated. At present, study table plates convenient to fold and store appear in the market, but most of the study table plates are combined by a mechanical structure and a spring and are not suitable for being independently operated by young children.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a learning table of flexible table and applied flexible table solves above technical problem.
In order to solve the above problems, the utility model adopts the following technical scheme:
a deformable table plate comprises a table plate, a bracket plate, a top plate mechanism and an electric telescopic mechanism, wherein the bracket plate can freely extend out of the front side of the table plate and can be folded to the bottom of the table plate, the top plate mechanism drives the bracket plate to lift, and the electric telescopic mechanism drives the bracket plate to move back and forth.
As a preferable scheme of the technical scheme, the electric telescopic mechanism further comprises a control system for controlling the top plate mechanism and the electric telescopic mechanism to act, wherein the control system comprises a driving control plate, an operation panel and a power switch; the driving control panel comprises a chip, a power input end, a relay output end and a signal input end; the chip at least comprises a motor driving pin, a time timing pin and a stopping pin; the signal input end is connected with a power switch wiring harness; the operation panel is provided with an extension key and a contraction key.
As a preferable scheme of the above technical scheme, the top plate mechanism comprises an M-shaped ejector rod, a direct current solenoid valve for driving the M-shaped ejector rod to lift, and a lifting column fixedly assembled on the elbow support plate through a Z-shaped angle code; two support arms of the M-shaped ejector rod are respectively provided with a long-strip-shaped stroke hole matched with the lifting column; the valve seat of the direct current electromagnetic valve is fixedly assembled on the table top plate, and the valve rod is fixedly assembled on the M-shaped ejector rod.
As a preferred scheme of the above technical scheme, the electric telescopic mechanism comprises two groups of connecting rod assemblies which are symmetrically arranged, a rotating shaft which drives the two groups of connecting rod assemblies to move, and a motor which drives the rotating shaft to rotate; the connecting rod assembly comprises a first connecting rod and a second connecting rod, the front end of the first connecting rod is fixedly assembled on the elbow supporting plate, one end of the second connecting rod is hinged with the tail end of the first connecting rod, and the other end of the second connecting rod is fixedly assembled with the rotating shaft; the outer side of the first connecting rod is provided with a guide stroke hole matched with a guide post fixedly assembled on the desktop plate.
As a preferable scheme of the above technical scheme, two ends of the electric telescopic mechanism are symmetrically provided with tension springs, the tension springs are arranged on the inner side of the connecting rod assembly, one end of each tension spring is assembled on a first corner brace used for fixing the first connecting rod on the elbow supporting plate, and the other end of each tension spring is assembled on the table top plate through a second corner brace.
As a preferable scheme of the above technical scheme, the shape of the elbow supporting plate is rectangular, trapezoid, semicircular, arc, concave circular or concave arc.
A learning desk applying a deformable desk board comprises a desk board and desk legs for supporting the desk board; the table plate adopts a deformable table plate and comprises a table plate, a elbow supporting plate, a top plate mechanism and an electric telescopic mechanism, wherein the elbow supporting plate can freely extend out of the front side of the table plate and can be folded to the bottom of the table plate, the top plate mechanism drives the elbow supporting plate to lift, and the electric telescopic mechanism drives the elbow supporting plate to move back and forth.
As a preferable scheme of the technical scheme, the electric telescopic mechanism further comprises a control system for controlling the top plate mechanism and the electric telescopic mechanism to act, wherein the control system comprises a driving control plate, an operation panel and a power switch; the driving control panel comprises a chip, a power input end, a relay output end and a signal input end; the chip at least comprises a motor driving pin, a time timing pin and a stopping pin; the signal input end is connected with a power switch wiring harness; the operation panel is provided with an extension key and a contraction key.
As a preferable scheme of the above technical scheme, the top plate mechanism comprises an M-shaped ejector rod, a direct current solenoid valve for driving the M-shaped ejector rod to lift, and a lifting column fixedly assembled on the elbow support plate through a Z-shaped angle code; two support arms of the M-shaped ejector rod are respectively provided with a long-strip-shaped stroke hole matched with the lifting column; the valve seat of the direct current electromagnetic valve is fixedly assembled on the table top plate, and the valve rod is fixedly assembled on the M-shaped ejector rod.
As a preferred scheme of the above technical scheme, the electric telescopic mechanism comprises two groups of connecting rod assemblies which are symmetrically arranged, a rotating shaft which drives the two groups of connecting rod assemblies to move, and a motor which drives the rotating shaft to rotate; the connecting rod assembly comprises a first connecting rod and a second connecting rod, the front end of the first connecting rod is fixedly assembled on the elbow supporting plate, one end of the second connecting rod is hinged with the tail end of the first connecting rod, and the other end of the second connecting rod is fixedly assembled with the rotating shaft; the outer side of the first connecting rod is provided with a guide stroke hole matched with a guide post fixedly assembled on the desktop plate; the two ends of the electric telescopic mechanism are symmetrically provided with tension springs, the tension springs are arranged on the inner side of the connecting rod assembly, one end of each tension spring is assembled on a first corner brace used for fixing the first connecting rod on the elbow supporting plate, and the other end of each tension spring is assembled on the table top plate through a second corner brace.
Has the advantages that: compared with the prior art, the utility model realizes the automatic folding and storage of the desk plate of the learning desk, reduces the occupied space when the learning desk is not used, and is beneficial to the reasonable utilization of the space; moreover, the electric control of the keys is adopted, so that the safety of the young children in independent operation is ensured.
Drawings
Fig. 1 is a schematic structural view of the deformable table of the present invention in an extended state;
fig. 2 is a schematic structural view of the deformable table of the present invention in a folded state;
fig. 3 is a schematic structural view of the electric telescopic mechanism of the present invention;
fig. 4 is a schematic structural view of a first connecting rod according to the present invention;
fig. 5 is a schematic structural view of a second connecting rod according to the present invention;
fig. 6 is a schematic structural view of the top plate mechanism of the present invention provided with a dc solenoid valve;
fig. 7 is a schematic structural view of the top plate mechanism of the present invention provided with two dc solenoid valves;
fig. 8 is a schematic structural view of the top plate mechanism of the present invention provided with three dc solenoid valves;
fig. 9 is a schematic circuit diagram of a control system according to the present invention;
fig. 10 is an exploded view of an embodiment of a learning table using a deformable table top according to the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the following detailed description.
Examples
Deformable table embodiments
Referring to fig. 1 to 9, the deformable table top according to the present embodiment includes a table top 1, a elbow supporting plate 2 capable of freely extending to the front side of the table top 1 and being folded to the bottom of the table top 1, a top plate mechanism for driving the elbow supporting plate 2 to lift, and an electric telescopic mechanism for driving the elbow supporting plate 2 to move back and forth. The device also comprises a control system for controlling the top plate mechanism and the electric telescopic mechanism to act.
The top plate mechanism comprises an M-shaped ejector rod 3, a direct-current electromagnetic valve 4 for driving the M-shaped ejector rod 3 to lift and a lifting column 6 fixedly assembled on the elbow supporting plate 2 through a Z-shaped angle bracket 5. Two support arms of the M-shaped ejector rod 3 are respectively provided with a long-strip-shaped stroke hole 7 matched with the lifting column 6. The valve seat of the direct current electromagnetic valve 4 is fixedly assembled on the desktop plate 1, and the valve rod is fixedly assembled on the M-shaped ejector rod 3.
When the length and the weight of the elbow supporting plate 2 are long, the top plate mechanism should respectively add a direct current electromagnetic valve 4 (the specific structure of which is shown in fig. 8) at the middle position of the M-shaped mandril 3 and at the end parts of the two arms of the M-shaped mandril 3, so as to ensure that the force is sufficient and the elbow supporting plate 2 is balanced when being jacked up. When the elbow supporting plate 2 is short and has proper weight, the top plate mechanism only needs to be provided with a direct current electromagnetic valve 4 (the specific structure of the direct current electromagnetic valve is shown in figure 6) at the middle position of the M-shaped ejector rod 3, so that the manufacturing cost is reduced. When the length of the elbow supporting plate 2 is long but the weight is light, the top plate mechanism should respectively add a direct current electromagnetic valve 4 (the specific structure of which is shown in fig. 7) at the end of each of the two arms of the M-shaped ejector rod 3 to ensure the lifting balance of the elbow supporting plate 2.
The electric telescopic mechanism comprises two groups of connecting rod assemblies which are symmetrically arranged, a rotating shaft 8 which drives the two groups of connecting rod assemblies to move and a motor 9 which drives the rotating shaft 8 to rotate. The connecting rod assembly comprises a first connecting rod 10 and a second connecting rod 11, the front end of the first connecting rod 10 is fixedly assembled on the elbow supporting plate 2, one end of the second connecting rod 11 is hinged with the tail end of the first connecting rod 10, and the other end of the second connecting rod 11 is fixedly assembled with the rotating shaft 8. The outer side of the first connecting rod 10 is provided with a guide travel hole 13 which is matched with a guide post 12 fixedly assembled on the table top board 1. Two ends of the electric telescopic mechanism are symmetrically provided with tension springs 14, the tension springs 14 are arranged on the inner side of the connecting rod assembly, one end of each tension spring is assembled on a first corner brace 15 used for fixing the first connecting rod 10 on the elbow supporting plate 2, and the other end of each tension spring is assembled on the table top plate 1 through a second corner brace 16.
The control system comprises a driving control panel, an operation panel and a power switch. The drive control panel comprises a chip, a power input end, a relay output end and a signal input end. The chip at least comprises a motor driving pin, a time timing pin and a stopping pin. The signal input end is connected with a power switch wiring harness. The operation panel is provided with an extension key and a contraction key. The output end of the relay is electrically connected with the motor 9 and the direct current electromagnetic valve 4.
The shape of the elbow supporting plate 2 includes but is not limited to rectangle, trapezoid, semicircle, arc, concave circle and concave arc.
Embodiment of learning desk
Referring to fig. 10, the learning table using the deformable table of the present embodiment includes a table top, table legs 17, a front cross member (not shown in the drawings) disposed at the front ends of the tops of the two table legs 17, and a rear cross member (not shown in the drawings) disposed at the rear ends of the tops of the two table legs 17. The table plate comprises a deformable table plate and a fixed table plate 20, the deformable table plate is hinged to the front cross beam, and the inclination angle of the deformable table plate can be adjusted (the connection mode of the table plate with the adjustable angle is the prior art, and the specific structure of the table plate is not described herein any more). The bookshelf is characterized by further comprising a connecting plate 18 and a bookshelf 19, wherein the connecting plate 18 and the bookshelf 19 are assembled between the two table legs 17, and the bookshelf 19 is assembled at the rear end of the top of the table legs 17 through a fixed table plate 20.
Referring to fig. 1 to 9, the deformable table comprises a table top board 1, a bracket 2 capable of freely extending to the front side of the table top board 1 and being folded to the bottom of the table top board 1, a top board mechanism for driving the bracket 2 to lift, and an electric telescopic mechanism for driving the bracket 2 to move back and forth. The device also comprises a control system for controlling the top plate mechanism and the electric telescopic mechanism to act.
The top plate mechanism comprises an M-shaped ejector rod 3, a direct-current electromagnetic valve 4 for driving the M-shaped ejector rod 3 to lift and a lifting column 6 fixedly assembled on the elbow supporting plate 2 through a Z-shaped angle bracket 5. Two support arms of the M-shaped ejector rod 3 are respectively provided with a long-strip-shaped stroke hole 7 matched with the lifting column 6. The valve seat of the direct current electromagnetic valve 4 is fixedly assembled on the desktop plate 1, and the valve rod is fixedly assembled on the M-shaped ejector rod 3.
When the length and the weight of the elbow supporting plate 2 are long, the top plate mechanism should respectively add a direct current electromagnetic valve 4 (the specific structure of which is shown in fig. 8) at the middle position of the M-shaped mandril 3 and at the end parts of the two arms of the M-shaped mandril 3, so as to ensure that the force is sufficient and the elbow supporting plate 2 is balanced when being jacked up. When the elbow supporting plate 2 is short and has proper weight, the top plate mechanism only needs to be provided with a direct current electromagnetic valve 4 (the specific structure of the direct current electromagnetic valve is shown in figure 6) at the middle position of the M-shaped ejector rod 3, so that the manufacturing cost is reduced. When the length of the elbow supporting plate 2 is long but the weight is light, the top plate mechanism should respectively add a direct current electromagnetic valve 4 (the specific structure of which is shown in fig. 7) at the end of each of the two arms of the M-shaped ejector rod 3 to ensure the lifting balance of the elbow supporting plate 2.
The electric telescopic mechanism comprises two groups of connecting rod assemblies which are symmetrically arranged, a rotating shaft 8 which drives the two groups of connecting rod assemblies to move and a motor 9 which drives the rotating shaft 8 to rotate. The connecting rod assembly comprises a first connecting rod 10 and a second connecting rod 11, the front end of the first connecting rod 10 is fixedly assembled on the elbow supporting plate 2, one end of the second connecting rod 11 is hinged with the tail end of the first connecting rod 10, and the other end of the second connecting rod 11 is fixedly assembled with the rotating shaft 8. The outer side of the first connecting rod 10 is provided with a guide travel hole 13 which is matched with a guide post 12 fixedly assembled on the table top board 1. Two ends of the electric telescopic mechanism are symmetrically provided with tension springs 14, the tension springs 14 are arranged on the inner side of the connecting rod assembly, one end of each tension spring is assembled on a first corner brace 15 used for fixing the first connecting rod 10 on the elbow supporting plate 2, and the other end of each tension spring is assembled on the table top plate 1 through a second corner brace 16.
The control system comprises a driving control panel, an operation panel and a power switch. The drive control panel comprises a chip, a power input end, a relay output end and a signal input end. The chip at least comprises a motor driving pin, a time timing pin and a stopping pin. The signal input end is connected with a power switch wiring harness. The operation panel is provided with an extension key and a contraction key. The output end of the relay is electrically connected with the motor 9 and the direct current electromagnetic valve 4.
As other embodiments of the present invention, the table plate of the learning table may further include a side fixing table plate disposed on the left side and/or the right side of the deformable table plate.
The working principle of the utility model is as follows:
when the elbow supporting plate 2 is folded into the bottom of the desktop plate 1, the power switch is turned on, and the control panel and the motor 9 are driven to obtain power. And a 'shrink' key on the operation panel is clicked, a high-level signal conducts a relay through a driving control panel, and the direct-current electromagnetic valve 4 is electrified to work. When the direct-current electromagnetic valve 4 works, the valve rod extends out under the action of magnetic force to push the M-shaped ejector rod 3 to move downwards, and then the elbow supporting plate 2 is driven to move vertically downwards (the movement amount is consistent with the thickness of the elbow supporting plate 2). When the elbow supporting plate 2 vertically moves downwards to reach the movement amount, the motor 9 is powered, at the moment, the motor 9 works to drive the rotating shaft 8 to rotate, further drive the second connecting rod 11 to rotate by taking the assembly end of the second connecting rod 11 and the rotating shaft 8 as an original point, and further drive the first connecting rod 10 to act to pull the elbow supporting plate 2 to move backwards until the elbow supporting plate 2 is positioned at the bottom of the table top plate 1 (as shown in fig. 2). The power-on time length of the motor 9 is set by a program to be consistent with the time for pulling the elbow supporting plate 2 into the bottom of the desktop plate 1, and the motor 9 stops working after the elbow supporting plate 2 is pulled into the bottom of the desktop plate 1; meanwhile, the working power supply of the direct current electromagnetic valve 4 is also closed.
When the elbow supporting plate 2 is pushed out to the front side of the desktop plate 1, the power switch is turned on, and the control panel and the motor 9 are driven to obtain power. Clicking a 'stretch' key on an operation panel, conducting a relay by a high level signal through a driving control panel, enabling a motor 9 to firstly obtain electricity to work, driving a rotating shaft 8 to rotate reversely, further driving a second connecting rod 11 to rotate reversely by taking the assembly end of the second connecting rod 11 and the rotating shaft 8 as an original point, further driving a first connecting rod 10 to act to push a toggle supporting plate 2 to move forwards to a set position, and stopping the motor 9. When the motor 9 stops working, the direct current solenoid valve 4 obtains reverse current, the valve rod retracts under the action of magnetic force, the M-shaped ejector rod 3 moves upwards, and then the elbow supporting plate 2 is pushed to move vertically upwards (the movement amount is consistent with the thickness of the elbow supporting plate 2) until the elbow supporting plate 2 is flush with the desktop plate 1 (as shown in figure 1).
The utility model realizes the automatic folding and storage of the desk plate of the learning desk, reduces the occupied space when the learning desk is not used, and is beneficial to the reasonable utilization of the space; moreover, the electric control of the keys is adopted, so that the safety of the young children in independent operation is ensured.
The above is only the embodiment of the present invention, not so limit on the other hand through the patent scope of the present invention, all utilize the equivalent structure made in the specification and the attached drawings, directly or indirectly apply to other related technical fields, all with the same principle within the patent protection scope of the present invention.
Claims (10)
1. A transformable table, comprising: comprises a table top plate (1), an elbow supporting plate (2) which can freely extend out of the front side of the table top plate (1) and can be folded to the bottom of the table top plate (1), a top plate mechanism for driving the elbow supporting plate (2) to lift and an electric telescopic mechanism for driving the elbow supporting plate (2) to move back and forth.
2. A transformable table as claimed in claim 1 wherein: the control system controls the top plate mechanism and the electric telescopic mechanism to act, and comprises a driving control plate, an operation panel and a power switch; the driving control panel comprises a chip, a power input end, a relay output end and a signal input end; the chip at least comprises a motor driving pin, a time timing pin and a stopping pin; the signal input end is connected with a power switch wiring harness; the operation panel is provided with an extension key and a contraction key.
3. A transformable table as claimed in claim 1 wherein: the top plate mechanism comprises an M-shaped ejector rod (3), a direct current solenoid valve (4) for driving the M-shaped ejector rod (3) to lift and a lifting column (6) fixedly assembled on the elbow supporting plate (2) through a Z-shaped angle bracket (5); two support arms of the M-shaped ejector rod (3) are respectively provided with a long-strip-shaped stroke hole (7) matched with the lifting column (6); the valve seat of the direct current electromagnetic valve (4) is fixedly assembled on the desktop plate (1), and the valve rod is fixedly assembled on the M-shaped ejector rod (3).
4. A transformable table as claimed in claim 1 wherein: the electric telescopic mechanism comprises two groups of connecting rod assemblies which are symmetrically arranged, a rotating shaft (8) which drives the two groups of connecting rod assemblies to move and a motor (9) which drives the rotating shaft (8) to rotate; the connecting rod assembly comprises a first connecting rod (10) and a second connecting rod (11), the front end of the first connecting rod (10) is fixedly assembled on the elbow supporting plate (2), one end of the second connecting rod (11) is hinged with the tail end of the first connecting rod (10), and the other end of the second connecting rod (11) is fixedly assembled with the rotating shaft (8); the outer side of the first connecting rod (10) is provided with a guide stroke hole (13) matched with a guide column (12) fixedly assembled on the table top plate (1).
5. A transformable table as claimed in claim 4 wherein: the two ends of the electric telescopic mechanism are symmetrically provided with tension springs (14), the tension springs (14) are arranged on the inner side of the connecting rod assembly, one end of each tension spring is assembled on a first corner connector (15) used for fixing the first connecting rod (10) on the elbow supporting plate (2), and the other end of each tension spring is assembled on the table top plate (1) through a second corner connector (16).
6. A transformable table as claimed in claim 1 wherein: the elbow supporting plate (2) is in a rectangular shape, a trapezoid shape, a semicircular shape, an arc shape, a concave circular shape or a concave arc shape.
7. A learning desk applying a deformable table plate comprises a table plate and table legs (17) for supporting the table plate; the method is characterized in that: the table plate is a deformable table plate and comprises a table plate (1), a elbow supporting plate (2) which can freely extend out of the front side of the table plate (1) and can be folded to the bottom of the table plate (1), a top plate mechanism for driving the elbow supporting plate (2) to lift and an electric telescopic mechanism for driving the elbow supporting plate (2) to move back and forth.
8. Learning table applying deformable table according to claim 7, characterized in that: the control system controls the top plate mechanism and the electric telescopic mechanism to act, and comprises a driving control plate, an operation panel and a power switch; the driving control panel comprises a chip, a power input end, a relay output end and a signal input end; the chip at least comprises a motor driving pin, a time timing pin and a stopping pin; the signal input end is connected with a power switch wiring harness; the operation panel is provided with an extension key and a contraction key.
9. Learning table applying deformable table according to claim 7, characterized in that: the top plate mechanism comprises an M-shaped ejector rod (3), a direct current solenoid valve (4) for driving the M-shaped ejector rod (3) to lift and a lifting column (6) fixedly assembled on the elbow supporting plate (2) through a Z-shaped angle bracket (5); two support arms of the M-shaped ejector rod (3) are respectively provided with a long-strip-shaped stroke hole (7) matched with the lifting column (6); the valve seat of the direct current electromagnetic valve (4) is fixedly assembled on the desktop plate (1), and the valve rod is fixedly assembled on the M-shaped ejector rod (3).
10. Learning table applying deformable table according to claim 7, characterized in that: the electric telescopic mechanism comprises two groups of connecting rod assemblies which are symmetrically arranged, a rotating shaft (8) which drives the two groups of connecting rod assemblies to move and a motor (9) which drives the rotating shaft (8) to rotate; the connecting rod assembly comprises a first connecting rod (10) and a second connecting rod (11), the front end of the first connecting rod (10) is fixedly assembled on the elbow supporting plate (2), one end of the second connecting rod (11) is hinged with the tail end of the first connecting rod (10), and the other end of the second connecting rod (11) is fixedly assembled with the rotating shaft (8); a guide stroke hole (13) matched with a guide column (12) fixedly assembled on the desktop plate (1) is formed in the outer side of the first connecting rod (10); the two ends of the electric telescopic mechanism are symmetrically provided with tension springs (14), the tension springs (14) are arranged on the inner side of the connecting rod assembly, one end of each tension spring is assembled on a first corner connector (15) used for fixing the first connecting rod (10) on the elbow supporting plate (2), and the other end of each tension spring is assembled on the table top plate (1) through a second corner connector (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921876166.4U CN211242515U (en) | 2019-10-22 | 2019-10-22 | Deformable table plate and learning table applying same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921876166.4U CN211242515U (en) | 2019-10-22 | 2019-10-22 | Deformable table plate and learning table applying same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211242515U true CN211242515U (en) | 2020-08-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921876166.4U Active CN211242515U (en) | 2019-10-22 | 2019-10-22 | Deformable table plate and learning table applying same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211242515U (en) |
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2019
- 2019-10-22 CN CN201921876166.4U patent/CN211242515U/en active Active
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