CN109793381A - A kind of drawing displaying device with automatic winding function - Google Patents
A kind of drawing displaying device with automatic winding function Download PDFInfo
- Publication number
- CN109793381A CN109793381A CN201910177776.3A CN201910177776A CN109793381A CN 109793381 A CN109793381 A CN 109793381A CN 201910177776 A CN201910177776 A CN 201910177776A CN 109793381 A CN109793381 A CN 109793381A
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- link block
- fixed
- block
- link
- backboard
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Abstract
The invention discloses a kind of, and the drawing with automatic winding function shows device, including pedestal, fixed ring and strut, universal wheel is connected with below the pedestal, it is welding between the pedestal and fixed block, the positioned beneath of the fixed ring has balancing leg, expansion bracket is installed above the pedestal, stop screw is connected on the right side of the fixed link, the strut is fixedly arranged above backboard, extension board is connected on the left of the backboard, it is punch forming between the extension board and the first link block, the positioned inside of first link block has the first winding rod, the inner bottom of second link block is equipped with miniature motor, locating piece is installed above the second winding rod.The drawing with automatic winding function shows that device is placed steadily, can adapt to broken terrain, and conveniently moving, the adjusting being able to carry out in height is easy-to-use, and convenient for packing up drawing.
Description
Technical field
The present invention relates to technical field of tools of giving lessons, specially a kind of drawing with automatic winding function shows device.
Background technique
It needs to use different tools when giving lessons, shows that device is exactly teacher in the tool needed in teaching
One kind, the drawing for being needed when fixed give lessons.
However, existing displaying device is not stable enough when placing, it is difficult to adapt to broken terrain, it is difficult to be moved
It is dynamic, it needs to be lifted when moving it, then be transported to suitable position, it is time-consuming and laborious, it not can be carried out the tune in height
Section, be not easy to carry out using, need frequently to replace drawing, and be not easy to pack up in drawing after the completion of use, for this purpose,
It is proposed that a kind of place steadily, broken terrain, conveniently moving can adapt to, the adjusting being able to carry out in height makes
With convenience, and the displaying device convenient for packing up drawing.
Summary of the invention
The purpose of the present invention is to provide a kind of, and the drawing with automatic winding function shows device, to solve above-mentioned background
The existing displaying device proposed in technology is not stable enough when placing, it is difficult to adapt to broken terrain, it is difficult to it is moved,
It needs to be lifted when moving it, then is transported to suitable position, it is time-consuming and laborious, it not can be carried out the adjusting in height,
It is not easy to carry out using needing frequently to replace drawing, and be not easy to the problem of packing up drawing after the completion of use.
To achieve the above object, the invention provides the following technical scheme: a kind of drawing with automatic winding function is shown
Device, including pedestal, fixed ring and strut are connected with universal wheel below the pedestal, and are equipped with fixation on the right side of pedestal
Block is welding between the pedestal and fixed block, and is connected with shaft on the right side of fixed block, and the positioned beneath of the fixed ring has
Balancing leg, and fixed ring is located at the right side of shaft, expansion bracket is equipped with above the pedestal, and be provided on the right side of expansion bracket
Fixed link, be connected with stop screw on the right side of the fixed link, and fixed link is internally provided with the first slideway, the strut
It is fixedly arranged above backboard, and strut is located at the inside of the first slideway, is connected with extension board on the left of the backboard, and extension board
Left side is fixed with the first link block, is punch forming between the extension board and the first link block, and the front of the first link block
Baffle is installed, the positioned inside of first link block has the first winding rod, and the tip exterior surface patch of the first winding rod
Conjunction has Anti-slip cover, the second link block is equipped on the right side of the backboard, and the left end surface of the second link block is provided with winding mouth,
The inner bottom of second link block is equipped with miniature motor, and the second winding rod is connected with above miniature motor, described
Locating piece is installed above second winding rod.
Preferably, to be threadedly coupled between the balancing leg and fixed ring, and balancing leg passes through between fixed ring and shaft
Cooperation and fixed block constitute rotational structure, and the bottom end surface of the bottom end surface of balancing leg and universal wheel is located at same level
Face.
Preferably, the strut constitutes slide construction by the first slideway and fixed link, and fixed link and strut are and only
Dynamic screw is vertical.
Preferably, the backboard is internally provided with the second slideway, and the positioned inside of the second slideway has sliding block, the branch
It is punch forming between bar and backboard, and backboard passes through the cooperation and pedestal composition lifting between strut, fixed link and expansion bracket
Structure.
Preferably, first link block is connected by extension board with backboard, and the first link block and the second link block
Between about backboard vertical centerline it is symmetrical, and the first link block and the second link block pass through extension board, sliding block and
Cooperation and backboard between two slideways constitute translation structure.
Preferably, the left end surface of first link block is equipped with hinge, and the front-end surface of hinge is fixed with fixation
Screw, the first winding rod is through the first link block, and the first winding rod is by Anti-slip cover composition coarse structure, and the
Vertical centerline between one winding rod and the first link block coincides.
Preferably, the right end face of the baffle is provided with locating slot, and the positioned inside of locating slot has fixture block, the card
Be connected with reset spring below block, and the outside of reset spring is provided with opening, the second winding rod and miniature motor it
Between for rotation connection, and second winding rod be fixedly connected by locating piece with the second link block.
Preferably, the hinge is connected with the first link block and baffle respectively by fixed screw, and baffle passes through conjunction
Page constitutes rotational structure with the first link block, and the structure between the first link block and the second link block is identical.
Preferably, first link block is flexibly connected by locating slot and fixture block with baffle, and fixture block is by resetting bullet
Spring and the first link block constitute pressing structure, and are open and match with the size between fixture block.
Compared with prior art, beneficial effects of the present invention are as follows:
1, the present invention passes through the setting of balancing leg, fixed ring, shaft, fixed block, pedestal and universal wheel, and balancing leg provides device
The effect of balanced support, places device smoothly, improves the stability of device, by balancing leg and fixed ring it
Between threaded connection, be finely adjusted the position of balancing leg vertical direction, to allow to adapt to roughly
Face, improves the stability of device, and universal wheel can be by frictional force of device when mobile between pedestal and ground by sliding friction
It is transformed into rolling friction, is greatly reduced the frictional force generated when device movement with ground, keeps the movement of device more convenient,
Fixed block improves the fastness connected between balancing leg and pedestal, to improve the fastness of device, is needing to device
When being moved, fixed ring can be turned by shaft, so that balancing leg be turned, balancing leg be made not hamper device
It is mobile.
2, the present invention is by strut, fixed link, the first slideway and stop screw setting, strut can in fixed link the
It is moved in one slideway, to the position on strut vertical direction be adjusted, by pivot stop screw, to strut
Position is fixed, and by the movement of strut in the vertical direction, backboard is driven to carry out the adjusting of position on vertical direction, thus
Go up and down device.
3, the present invention passes through the setting of first level extension bar, the second horizontal extension bar, standing screw and nut, the first link block
Rod is wound with first inside the second link block and big drawing is fixed in the second winding rod, and separating on big drawing has difference big
Small and size small drawing, applying active force to the first link block or the second link block moves sliding block in the second slideway
It is dynamic, so that adjusting is able to carry out to the distance between the first link block and the second link block, to make device to different length
Big drawing is adjusted, and improves the scope of application of device.
4, the present invention carries out it to drawing by rotation the first winding rod by the setting of smart platform, backplate, telescopic rod
Winding is stretched at backboard, convenient for teacher to small drawing different on big drawing to wind the drawing wound on rod for second
It is replaced, to explain to different small drawings, Anti-slip cover improves rubbing between teacher's hand and the first winding rod
Power is wiped, the first winding rod is made easily not fall off from hand, keeps the adjusting of device more convenient, is explained to entire big drawing
After the completion, the second winding rod is driven to be rotated by the rotation of miniature motor, to wind to big drawing, locating piece makes
The velocity of rotation of second winding rod can receive limitation, make the revolving speed of the second winding rod will not be too fast, it is therefore prevented that big drawing stress
It is excessive and there is a situation where be broken.
5, the present invention passes through the setting of the first locating rod, the second locating rod, connector sleeve and spinner handle, and fixed screw improves conjunction
The fastness connected between page and the first link block and baffle, makes baffle be able to carry out rotation, to make the first company by hinge
Connecing block can open, and be mounted on hinge and baffle on the first link block and the second link block, install big drawing convenient for teacher
Into device, locating slot provides fixation to the first link block by fixture block, applies downward active force to fixture block, by resetting bullet
The elasticity of spring, is pressed into it in opening, to make locating slot that can not provide fixation to the first link block by fixture block, to make
First link block can be opened, then pin fixture block, and the first link block is closed, and unclamp elastic force of the fixture block by reset spring, will
Fixture block bounces, and makes locating slot continue to provide fixation to fixture block, simplifies the use step of device, makes the use of device more just
Benefit.
Detailed description of the invention
Fig. 1 is schematic view of the front view of the present invention；
Fig. 2 is back board structure schematic diagram of the present invention；
Fig. 3 is baffle left view structural representation of the present invention；
Fig. 4 is baffle right side structural representation of the present invention；
Fig. 5 is the first connecting block structure schematic diagram of the invention；
Fig. 6 is enlarged structure schematic diagram at A of the present invention.
In figure: 1, pedestal；2, universal wheel；3, fixed block；4, shaft；5, fixed ring；6, balancing leg；7, expansion bracket；8, solid
Fixed pole；9, stop screw；10, the first slideway；11, strut；12, backboard；13, extension board；14, the first link block；15, baffle；
16, the first winding rod；17, Anti-slip cover；18, the second link block；19, mouth is wound；20, miniature motor；21, the second winding rod；22,
Locating piece；23, sliding block；24, the second slideway；25, hinge；26, fixed screw；27, locating slot；28, fixture block；29, reset spring；
30, it is open.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Fig. 1-6 is please referred to, the present invention provides a kind of technical solution: a kind of drawing displaying dress with automatic winding function
It sets, including pedestal 1, fixed ring 5 and strut 11, it is characterised in that: the lower section of pedestal 1 is connected with universal wheel 2, and the right side of pedestal 1
Side is equipped with fixed block 3, is welding between pedestal 1 and fixed block 3, and the right side of fixed block 3 is connected with shaft 4, fixed ring 5
Positioned beneath has balancing leg 6, and fixed ring 5 is located at the right side of shaft 4, is threadedly coupled between balancing leg 6 and fixed ring 5, and
Balancing leg 6 constitutes rotational structure, and the bottom end table of balancing leg 6 with fixed block 3 by the cooperation between fixed ring 5 and shaft 4
The bottom end surface of face and universal wheel 2 is located at same level, and balancing leg 6 provides the effect of balanced support to device, makes device
It can smoothly place, improve the stability of device, by the threaded connection between balancing leg 6 and fixed ring 5, make balancing leg
The position of 6 vertical directions can be finely adjusted, to allow to adapt to broken terrain, improve the stabilization of device
Property, frictional force of device when mobile between pedestal 1 and ground can be transformed into rolling friction by sliding friction by universal wheel 2, greatly
Big reduces the frictional force generated when device movement with ground, keeps the movement of device more convenient, fixed block 3 improves balance
The fastness connected between foot 6 and pedestal 1, when needing to move device, passes through to improve the fastness of device
Shaft 4 can play 5 turns of fixed ring, so that 6 turns of balancing leg be risen, balancing leg 6 be made not hamper the movement of device, pedestal 1
Top expansion bracket 7 is installed, and the right side of expansion bracket 7 is provided with fixed link 8, and the right side of fixed link 8 is connected with stop screw
9, and fixed link 8 is internally provided with the first slideway 10, strut 11 is fixedly arranged above backboard 12, and to be located at first sliding for strut 11
The inside in road 10, strut 11 constitute slide construction by the first slideway 10 and fixed link 8, and fixed link 8 and strut 11 are and only
Dynamic screw 9 is vertical, and strut 11 can be moved in the first slideway 10 in fixed link 8, thus to 11 vertical direction of strut
On position be adjusted, by pivot stop screw 9, the position of strut 11 is fixed, the left side of backboard 12 is connected with
Extension board 13, and the left side of extension board 13 is fixed with the first link block 14, is punch forming between strut 11 and backboard 12, and carry on the back
Plate 12 passes through cooperation and the composition lifting structure of pedestal 1 between strut 11, fixed link 8 and expansion bracket 7, by strut 11 vertical
Movement on direction drives backboard 12 to carry out the adjusting of position on vertical direction, so that device be made to be gone up and down, extension board 13 with
It is punch forming between first link block 14, and the front of the first link block 14 is equipped with baffle 15；
The positioned inside of first link block 14 has the first winding rod 16, and the tip exterior surface of the first winding rod 16 be fitted with it is anti-
Sliding sleeve 17, the first winding rod 16 is through the first link block 14, and the first winding rod 16 constitutes coarse structure by Anti-slip cover 17,
And the vertical centerline between the first winding rod 16 and the first link block 14 coincides, and makes it by rotation the first winding rod 16
Drawing is wound, is stretched at backboard 12 to wind the drawing wound on rod 21 for second, convenient for teacher to big drawing
Upper different small drawing is replaced, to explain to different small drawings, Anti-slip cover 17 improves teacher's hand and
Frictional force between one winding rod 16, makes the first winding rod 16 easily not fall off from hand, makes the adjusting of device more just
Benefit, the right side of backboard 12 is equipped with the second link block 18, and the left end surface of the second link block 18 is provided with and winds mouth 19, and second
The inner bottom of link block 18 is equipped with miniature motor 20, and the top of miniature motor 20 is connected with the second winding rod 21, and second
It winds to be rotatablely connected between rod 21 and miniature motor 20, and the second winding rod 21 is solid by locating piece 22 and the second link block 18
Fixed connection drives the second winding rod 21 to be rotated after the completion of to entire big drawing explanation by the rotation of miniature motor 20,
To wind to big drawing, locating piece 22 enables the velocity of rotation of the second winding rod 21 to receive limitation, makes the second winding
The revolving speed of rod 21 will not be too fast, it is therefore prevented that big drawing stress it is excessive and theres is a situation where be broken, the top of the second winding rod 21 is pacified
Equipped with locating piece 22, backboard 12 is internally provided with the second slideway 24, and the positioned inside of the second slideway 24 has a sliding block 23, and first
The left end surface of link block 14 is equipped with hinge 25, and the front-end surface of hinge 25 is fixed with fixed screw 26, the first link block
14 are connected by extension board 13 with backboard 12, and about the vertical of backboard 12 between the first link block 14 and the second link block 18
Center line is symmetrical, and the first link block 14 and the second link block 18 by extension board 13, sliding block 23 and the second slideway 24 it
Between cooperation and backboard 12 constitute translation structure, first inside the first link block 14 and the second link block 18 winds rod 16 and the
Big drawing is fixed in two winding rods 21, the small drawing for having different size and size is separated on big drawing, to the first link block
14 or second link block 18 apply active force move sliding block 23 in the second slideway 24, thus to 14 He of the first link block
The distance between second link block 18 is able to carry out adjusting, to make device that the big drawing of different length be adjusted, is promoted
The scope of application of device, hinge 25 is respectively connected with the first link block 14 and baffle 15 by fixed screw 26, and baffle
15 constitute rotational structure, and the structure between the first link block 14 and the second link block 18 by hinge 25 and the first link block 14
Identical, fixed screw 26 improves the fastness connected between hinge 25 and the first link block 14 and baffle 15, passes through hinge 25
Baffle 15 is set to be able to carry out rotation, to enable the first link block 14 to open, on the first link block 14 and the second link block 18
It is mounted on hinge 25 and baffle 15, big drawing is installed in device convenient for teacher, the right end face of baffle 15 is provided with fixed
Position slot 27, and the positioned inside of locating slot 27 has fixture block 28, the lower section of fixture block 28 is connected with reset spring 29, and reset spring 29
Outside be provided with opening 30, the first link block 14 is flexibly connected by locating slot 27 and fixture block 28 with baffle 15, and fixture block 28
Pressing structure is constituted by reset spring 29 and the first link block 14, and opening 30 matches with the size between fixture block 28,
Locating slot 27 provides fixation to the first link block 14 by fixture block 28, applies downward active force to fixture block 28, by resetting bullet
The elasticity of spring 29 is pressed into it in opening 30, to make locating slot 27 that can not provide by fixture block 28 the first link block 14
It is fixed, so that the first link block 14 be enable to open, then fixture block 28 is pinned, the first link block 14 is closed, it is logical to unclamp fixture block 28
The elastic force for crossing reset spring 29 bounces fixture block 28, makes locating slot 27 continue to provide fixation to fixture block 28, simplifies making for device
With step, keep the use of device more convenient.
Working principle: downward active force first applies fixture block 28 for this kind of displaying device, passes through reset spring
29 elasticity is pressed into it in opening 30, so that it is solid to provide locating slot 27 can not by fixture block 28 to the first link block 14
It is fixed, then by 25 flap shutter 15 of hinge, so that the first link block 14 and the second link block 18 be opened, then will teach and need to make
The big drawing used is wound on the second winding rod 21, then the other end of big drawing is wrapped on the first winding rod 16, will be big
Drawing is adjusted to suitable position, before so that the small drawing of left end on big drawing is presented on backboard 12, then will be fixed by shaft 4
Ring 5 and 6 turns of balancing leg rise, pushing meanss, by the rotation of universal wheel 2, shift device onto suitable position, then by balancing leg 6
Under turning, suitable position is turned by rotary balance foot 6, balancing leg 6 provides support to device, then exists by strut 11
It is moved in the first slideway 10 in fixed link 8, drives backboard 12 to carry out the adjusting in height, backboard 12 is adjusted to properly
Position, pivot stop screw 9 is fixed the position of strut 11, then explains to drawing；
It is wound to drawing by rotation the first winding rod 16, is stretched so that second is wound the drawing wound on rod 21
To backboard 12, small drawing different on big drawing is replaced convenient for teacher, so that different small drawings is explained,
Anti-slip cover 17 improves the frictional force between teacher's hand and the first winding rod 16, makes the first winding rod 16 will not be easily from hand
In fall off, after the completion of to entire big drawing explanation, drive the second winding rod 21 to be rotated by the rotation of miniature motor 20,
To wind to big drawing, applying active force to the first link block 14 or the second link block 18 makes sliding block 23 in the second slideway
It is moved in 24, so that adjusting is able to carry out to the distance between the first link block 14 and the second link block 18, to make to fill
It sets and the big drawing of different length is adjusted, complete the entire use process for showing device like this.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (9)
1. a kind of drawing with automatic winding function shows device, including pedestal (1), fixed ring (5) and strut (11), special
Sign is: being connected with universal wheel (2) below the pedestal (1), and is equipped with fixed block (3), the bottom on the right side of pedestal (1)
It is welding between seat (1) and fixed block (3), and is connected with shaft (4) on the right side of fixed block (3), the lower section of the fixed ring (5)
It is mounted with balancing leg (6), and fixed ring (5) is located at the right side of shaft (4), is equipped with expansion bracket above the pedestal (1)
(7), it and on the right side of expansion bracket (7) is provided with fixed link (8), is connected with stop screw (9) on the right side of the fixed link (8), and
Fixed link (8) is internally provided with the first slideway (10), and the strut (11) is fixedly arranged above backboard (12), and strut (11)
Positioned at the inside of the first slideway (10), it is connected with extension board (13) on the left of the backboard (12), and the left side of extension board (13)
It is fixed with the first link block (14), is punch forming between the extension board (13) and the first link block (14), and first connects
It is equipped in front of block (14) baffle (15), the positioned inside of first link block (14) has the first winding rod (16), and
The tip exterior surface of one winding rod (16) is fitted with Anti-slip cover (17), is equipped with the second link block on the right side of the backboard (12)
(18), and the left end surface of the second link block (18) is provided with winding mouth (19), the inner bottom of second link block (18)
It is equipped with miniature motor (20), and is connected with the second winding rod (21) above miniature motor (20), the second winding rod
(21) locating piece (22) are installed above.
2. a kind of drawing with automatic winding function according to claim 1 shows device, it is characterised in that: described flat
To be threadedly coupled between weighing apparatus foot (6) and fixed ring (5), and balancing leg (6) passes through the cooperation between fixed ring (5) and shaft (4)
Rotational structure is constituted with fixed block (3), and the bottom end surface of the bottom end surface of balancing leg (6) and universal wheel (2) is positioned at same
Horizontal plane.
3. a kind of drawing with automatic winding function according to claim 1 shows device, it is characterised in that: the branch
Bar (11) constitutes slide construction by the first slideway (10) and fixed link (8), and fixed link (8) and strut (11) with stop spiral shell
Silk (9) is vertical.
4. a kind of drawing with automatic winding function according to claim 1 shows device, it is characterised in that: the back
Plate (12) is internally provided with the second slideway (24), and the positioned inside of the second slideway (24) has sliding block (23), the strut
It (11) is punch forming between backboard (12), and backboard (12) passes through between strut (11), fixed link (8) and expansion bracket (7)
Cooperation and pedestal (1) constitute lifting structure.
5. a kind of drawing with automatic winding function according to claim 4 shows device, it is characterised in that: described the
One link block (14) is connected by extension board (13) with backboard (12), and the first link block (14) and the second link block (18) it
Between about backboard (12) vertical centerline it is symmetrical, and the first link block (14) and the second link block (18) pass through extension board
(13), the cooperation between sliding block (23) and the second slideway (24) and backboard (12) constitute translation structure.
6. a kind of drawing with automatic winding function according to claim 1 shows device, it is characterised in that: described the
The left end surface of one link block (14) is equipped with hinge (25), and the front-end surface of hinge (25) is fixed with fixed screw (26),
First winding rod (16) is through the first link block (14), and the first winding rod (16) is coarse by Anti-slip cover (17) composition
Structure, and the vertical centerline between the first winding rod (16) and the first link block (14) coincides.
7. a kind of drawing with automatic winding function according to claim 1 shows device, it is characterised in that: the gear
The right end face of plate (15) is provided with locating slot (27), and the positioned inside of locating slot (27) has fixture block (28), the fixture block
(28) it is connected with below reset spring (29), and the outside of reset spring (29) is provided with opening (30), second winding
It is rotation connection between rod (21) and miniature motor (20), and the second winding rod (21) passes through locating piece (22) and the second link block
(18) it is fixedly connected.
8. a kind of drawing with automatic winding function according to claim 6 shows device, it is characterised in that: the conjunction
Page (25) is connected with the first link block (14) and baffle (15) respectively by fixed screw (26), and baffle (15) passes through hinge
(25) rotational structure, and the structure phase between the first link block (14) and the second link block (18) are constituted with the first link block (14)
Together.
9. a kind of drawing with automatic winding function according to claim 7 shows device, it is characterised in that: described the
One link block (14) is flexibly connected by locating slot (27) and fixture block (28) with baffle (15), and fixture block (28) passes through reset spring
(29) pressing structure is constituted with the first link block (14), and the size being open between (30) and fixture block (28) matches.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910177776.3A CN109793381B (en) | 2019-03-10 | 2019-03-10 | Drawing display device with automatic winding function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910177776.3A CN109793381B (en) | 2019-03-10 | 2019-03-10 | Drawing display device with automatic winding function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109793381A true CN109793381A (en) | 2019-05-24 |
| CN109793381B CN109793381B (en) | 2021-07-09 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910177776.3A Active CN109793381B (en) | 2019-03-10 | 2019-03-10 | Drawing display device with automatic winding function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109793381B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110897346A (en) * | 2019-12-09 | 2020-03-24 | 怀化学院 | Table for product design |
| CN112137253A (en) * | 2020-10-10 | 2020-12-29 | 邵阳博瑞钟表制造有限公司 | Intelligence children wrist-watch watchband subassembly |
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