CN214258319U - A table with adjustable table top angle - Google Patents
A table with adjustable table top angle Download PDFInfo
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- CN214258319U CN214258319U CN202023120620.9U CN202023120620U CN214258319U CN 214258319 U CN214258319 U CN 214258319U CN 202023120620 U CN202023120620 U CN 202023120620U CN 214258319 U CN214258319 U CN 214258319U
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- angle adjustment
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Abstract
本实用新型涉及家居用品技术领域，尤其是指一种桌面角度可调的桌子，包括桌面、桌脚及角度调节装置，角度调节装置包括固定座、角度调节件及将角度调节件与固定座锁固的锁固机构，固定座设于桌面，角度调节件的一端设于桌脚，角度调节件的另一端与固定座转动连接，角度调节件和固定座彼此靠近的一侧分别设有第一角度调节结构和第二角度调节结构，第一角度调节结构为内凹锥形齿面或外凸锥形齿面，对应地，第二角度调节结构为凸锥形齿面或内凹锥形齿面，第一角度调节结构与第二角度调节结构卡接。本实用新型的结构简单，使用便捷，桌面的角度可调，通过内凹锥形齿面与外凸锥形齿面凹凸适配且卡接，使得固定座与角度调节件卡接牢固，桌子使用牢靠。
The utility model relates to the technical field of household appliances, in particular to a table with an adjustable table top angle, comprising a table top, table legs and an angle adjustment device. A fixed locking mechanism, the fixed seat is set on the desktop, one end of the angle adjustment piece is set on the table foot, the other end of the angle adjustment piece is rotatably connected with the fixed base, and the side of the angle adjustment piece and the fixed base close to each other is respectively provided with a first Angle adjustment structure and second angle adjustment structure, the first angle adjustment structure is a concave conical tooth surface or an external convex conical tooth surface, correspondingly, the second angle adjustment structure is a convex conical tooth surface or a concave conical tooth surface On the surface, the first angle adjustment structure is clamped with the second angle adjustment structure. The utility model has the advantages of simple structure, convenient use, and the angle of the table top can be adjusted. reliable.
Description
Technical Field
The utility model belongs to the technical field of household articles technique and specifically relates to indicate a desk of desktop angularly adjustable.
Background
The desk is an indispensable tool for people in life or office, and brings great convenience to people. The existing tables are various and have various functions, and for different use occasions and use requirements, the table tops are required to be inclined into various forward inclination angles for use. However, the tabletop of the existing table is generally fixed, the forward inclination angle of the tabletop cannot be adjusted, the table is inconvenient to use, various different use requirements cannot be met, the universality is poor, and the application range is small. Although a table with an adjustable table top angle is available in the prior art, the angle adjustment steps are complicated, difficult and insecure, even special adjusting tools are needed, and the difficulty of adjusting the table top angle by a user is greatly improved. Therefore, the drawbacks are obvious, and a solution is needed.
SUMMERY OF THE UTILITY MODEL
In order to solve the above technical problem, the present invention aims to provide a table with an adjustable table top angle.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the table with the angle-adjustable table top comprises a table top body, table legs and an angle adjusting device arranged between the table top body and the table legs, wherein the angle adjusting device comprises a fixing seat, an angle adjusting piece and a locking mechanism, the fixing seat is installed on the table top body, one end of the angle adjusting piece is arranged on the table legs, the other end of the angle adjusting piece is rotatably connected with the fixing seat, a first angle adjusting structure and a second angle adjusting structure are respectively arranged on one side, close to the fixing seat, of the angle adjusting piece, the first angle adjusting structure is a concave conical tooth surface or a convex conical tooth surface, correspondingly, the second angle adjusting structure is a convex conical tooth surface or a concave conical tooth surface, and the locking mechanism is used for locking the angle adjusting piece and the fixing seat so that the first angle adjusting structure is clamped with the second angle adjusting structure.
Further, the desktop is provided with a placing groove.
Furthermore, the concave conical tooth surface comprises a concave conical surface and a plurality of first clamping teeth arranged on the concave conical surface, and the plurality of first clamping teeth are arranged around the central axis of the concave conical surface in an annular array; the convex conical tooth surface comprises a convex conical surface and a plurality of second clamping teeth arranged on the convex conical surface, the second clamping teeth are arranged in an annular array around a central bearing of the convex conical surface, the concave conical surface is in concave-convex fit with the convex conical surface, and the first clamping teeth are clamped with the second clamping teeth.
Further, the angle adjusting part is provided with a rotating part, the fixing seat is provided with a rotating drum which is coaxial with the rotating drum, the rotating part protrudes into the rotating drum and is rotatably connected with the rotating drum, the first angle adjusting structure is arranged on the end face of the rotating part, and the second angle adjusting structure is located in the rotating drum.
Further, locking mechanism includes locking closure, first elastic component, pull rod and drive unit, the pull rod runs through locking closure, fixing base and angle modulation piece in proper order, first elastic component sets up between fixing base and locking closure, the one end of pull rod stretches out outside angle modulation piece and is provided with the stopper that is used for conflicting with the outside of angle modulation piece, the other end of pull rod stretches out outside the locking closure and is connected with drive unit, drive unit is used for exerting the locking power or blockking the locking closure to the locking closure, locking closure and fixing base or/and pull rod sliding connection.
Furthermore, the outer side surface of the fixing seat is concavely provided with an accommodating cavity, and the lock cover is accommodated in the accommodating cavity.
Furthermore, the driving unit is a locking handle, one end of the locking handle is rotatably connected with the pull rod and is provided with a cam pressing block, the cam pressing block is provided with a blocking plane and an extrusion convex part located at one end of the blocking plane, the blocking plane is used for blocking the lock cover, and the extrusion convex part is used for applying locking force to the lock cover.
Further, the angle adjusting piece is rotatably connected with the table foot through a folding device.
Further, folding device includes connecting seat, joint spare and second elastic component, the connecting seat is installed in the table foot, angle adjusting piece rotates with the connecting seat to be connected, joint spare goes up and down to set up between connecting seat and angle adjusting piece, the joint spare is contradicted to the one end of second elastic component, and the connecting seat is contradicted to the other end of second elastic component, the one end that second elastic component was kept away from to the joint spare is provided with the card protruding, angle adjusting piece is provided with a plurality of draw-in grooves, and a plurality of draw-in grooves are circular-arc and arrange, the card is protruding and the unsmooth adaptation of draw-in groove.
Further, the desktop is provided with a supporting plate.
The utility model has the advantages that: in practical application, the fixing seat and the angle adjusting piece are fixed together by the locking mechanism, so that the desktop is fixed at a specific angle, and the desktop is supported by the desk legs; when the angle of the desktop needs to be adjusted, the locking mechanism unlocks the fixing seat and the angle adjusting piece, the first angle adjusting structure and the second angle adjusting structure are not clamped, the fixing seat can rotate relative to the angle adjusting piece, the fixing seat and the desktop synchronously rotate to adjust the angle of the desktop, the desktop can be horizontally arranged or obliquely arranged, a user determines the angle of the desktop according to actual requirements, after the angle of the desktop is adjusted, the fixing seat and the angle adjusting piece are locked together by the locking mechanism, and the first angle adjusting structure is clamped with the second angle adjusting structure to fix the angle of the desktop. The utility model has the advantages of simple structure, it is convenient to use, the angularly adjustable of desktop, the practicality is strong, and through indent toper flank of tooth and the unsmooth adaptation of evagination toper flank of tooth and joint for fixing base and angle adjusting piece firmly the joint together, have improved the stability of desktop, and the desk is used firmly, and the security performance is good.
Drawings
Fig. 1 is a schematic perspective view of the present invention.
Fig. 2 is a schematic perspective view of another perspective of the present invention.
Fig. 3 is a partial sectional view (sectional view of the angle adjusting device and the folding device) of the present invention.
Fig. 4 is an exploded schematic view of the angle adjusting device and the folding device of the present invention.
Fig. 5 is an exploded view of the angle adjusting device and the folding device according to another aspect of the present invention.
Description of reference numerals:
1. a desktop; 2. a table leg; 3. an angle adjusting device; 31. a fixed seat; 311. a second angle adjustment structure; 312. a convex conical surface; 313. a second snap tooth; 314. a rotating drum; 315. an accommodating cavity; 32. an angle adjusting member; 321. a first angle adjustment structure; 322. a concave conical surface; 323. a first snap tooth; 324. a rotating part; 33. a locking mechanism; 331. a locking cover; 332. a first elastic member; 333. a pull rod; 334. a drive unit; 335. a limiting block; 336. pressing a cam block; 337. a blocking plane; 338. extruding the convex part; 4. a placement groove; 5. a folding device; 51. a connecting seat; 52. a clamping piece; 53. a second elastic member; 54. clamping convex; 55. A card slot; 6. a support plate; 61. a chute; 62. a non-slip mat.
Detailed Description
In order to facilitate understanding of those skilled in the art, the present invention will be further described with reference to the following examples and drawings, which are not intended to limit the present invention.
As shown in fig. 1 to 5, the present invention provides a table with an adjustable angle of a table top, which comprises a table top 1, a table leg 2 and an angle adjusting device 3 disposed between the table top 1 and the table leg 2, wherein the angle adjusting device 3 comprises a fixing seat 31, an angle adjusting member 32 and a locking mechanism 33, the fixing seat 31 is disposed on the bottom surface of the table top 1, one end of the angle adjusting member 32 is disposed on the table leg 2, the other end of the angle adjusting member 32 is rotatably connected to the fixing seat 31, a first angle adjusting structure 321 and a second angle adjusting structure 311 are respectively disposed on the sides of the angle adjusting member 32 and the fixing seat 31 close to each other, the first angle adjusting structure 321 is an inward concave tapered tooth surface or an outward convex tapered tooth surface, correspondingly, the second angle adjusting structure 311 is an outward convex tapered tooth surface or an inward concave tapered tooth surface, the locking mechanism 33 is used for locking the angle adjusting member 32 and the fixing seat 31, so that the first angle adjusting structure 321 is engaged with the second angle adjusting structure 311. Specifically, when the first angle adjusting structure 321 is a concave tapered tooth surface, the second angle adjusting structure 311 is a convex tapered tooth surface; when the first angle adjusting structure 321 is a convex conical tooth surface, the second angle adjusting structure 311 is a concave conical tooth surface, the first angle adjusting structure 321 is located on the angle adjusting piece 32, the second angle adjusting structure 311 is located on the fixed seat 31, and the concave conical tooth surface is in concave-convex fit with the convex conical tooth surface.
In practical applications, the locking mechanism 33 locks the fixing seat 31 and the angle adjusting member 32 together, so that the table top 1 is fixed at a specific angle, and the table legs 2 support the table top 1; when the angle of the desktop 1 needs to be adjusted, the locking mechanism 33 unlocks the fixed seat 31 and the angle adjusting piece 32, so that the first angle adjusting structure 321 and the second angle adjusting structure 311 are not clamped, the fixed seat 31 can rotate relative to the angle adjusting piece 32, the fixed seat 31 and the desktop 1 synchronously rotate to adjust the angle of the desktop 1, the desktop 1 can be horizontally arranged or obliquely arranged, a user determines the angle of the desktop 1 according to actual requirements, after the angle of the desktop 1 is adjusted, the locking mechanism 33 locks the fixed seat 31 and the angle adjusting piece 32 together, and the first angle adjusting structure 321 is clamped with the second angle adjusting structure 311 to fix the angle of the desktop 1. The utility model has the advantages of simple structure, it is convenient to use, desktop 1's angularly adjustable, and the practicality is strong, and through indent toper flank of tooth and the unsmooth adaptation of evagination toper flank of tooth and joint for fixing base 31 and angle adjusting part 32 firmly the joint together, have improved desktop 1's stability, and the desk is used firmly, and the security performance is good.
In this embodiment, the top surface of the desktop 1 is provided with the long strip-shaped placing groove 4, so that a user can place a product (such as a pen) in the placing groove 4, not only can store the product, but also can support an electronic product (such as a mobile phone or a tablet personal computer) to enable the electronic product to be placed obliquely or vertically, and the user can observe the electronic product conveniently.
In this embodiment, the concave tapered tooth surface includes a concave tapered surface 322 and a plurality of first snap-fit teeth 323 disposed on the concave tapered surface 322, and the plurality of first snap-fit teeth 323 are disposed in an annular array around a central axis of the concave tapered surface 322; the convex conical tooth surface comprises a convex conical surface 312 and a plurality of second clamping teeth 313 arranged on the convex conical surface 312, the second clamping teeth 313 are arranged around a central bearing of the convex conical surface 312 in an annular array, the concave conical surface 322 is in concave-convex fit with the convex conical surface 312, and the first clamping teeth 323 are clamped with the second clamping teeth 313. The structural design is convenient for angle adjustment of the desktop 1, and the concave conical tooth surface and the convex conical tooth surface are clamped more firmly and stably.
Specifically, the first clamping teeth 323 are arranged at equal angular intervals, the second clamping teeth 313 are arranged at equal angular intervals, the first clamping teeth 323 and the second clamping teeth 313 are staggered to realize clamping, and the angle between two adjacent first clamping teeth 323 and the angle between two adjacent second clamping teeth 313 are both 12 degrees; the structural design can adjust the angle of the desktop 1 at equal angles. Preferably, the adjustable angle of the table top 1 is 0, 12, 24 or 36.
In this embodiment, the angle adjusting member 32 is provided with a rotating portion 324, the fixed seat 31 is provided with a rotating drum 314 coaxially arranged with the rotating drum 314, the rotating portion 324 protrudes into the rotating drum 314 and is rotatably connected with the rotating drum 314, the first angle adjusting structure 321 is arranged on an end surface of the rotating portion 324, the second angle adjusting structure 311 is located in the rotating drum 314, and the rotating portion 324 is cylindrical. The rotating portion 324 protrudes into the rotating cylinder 314, when the fixing base 31 rotates relative to the angle adjusting member 32, the rotating portion 324 serves as a rotating shaft, and the rotating cylinder 314 rotates around the central axis of the rotating portion 324, so that the rotation of the fixing base 31 relative to the angle adjusting member 32 is facilitated, the stability of the rotation of the fixing base 31 relative to the angle adjusting member 32 is improved, and the angle of the table top 1 can be adjusted conveniently.
In this embodiment, the locking mechanism 33 includes a lock cover 331, a first elastic member 332, a pull rod 333 and a driving unit 334, the pull rod 333 sequentially penetrates through the lock cover 331, the fixing base 31 and the angle adjusting member 32, the pull rod 333 and the first elastic member 332 are both horizontally disposed, the first elastic member 332 is disposed between the fixing base 31 and the lock cover 331, one end of the pull rod 333 protrudes out of the angle adjusting member 32 and is provided with a limit block 335 for abutting against the outer side of the angle adjusting member 32, the other end of the pull rod 333 protrudes out of the lock cover 331 and is connected to the driving unit 334, the driving unit 334 is configured to apply a locking force to the lock cover 331 or block the lock cover 331, and the lock cover 331 is slidably connected to the fixing base 31 or/and the pull rod 333. When the desktop 1 is fixed at a certain angle, the driving unit 334 applies a locking force to the locking cover 331 and tightens the pull rod 333, so that the limiting block 335 on the pull rod 333 is abutted against the angle adjusting member 32, the limiting block 335 limits the pull rod 333, and meanwhile, the locking cover 331 compresses the first elastic member 332 and presses the fixing seat 31 on the angle adjusting member 32, so that the first angle adjusting structure 321 is clamped with the second angle adjusting structure 311. When the angle of desktop 1 needs to be adjusted, drive unit 334 releases the locking power to locking closure 331, locking closure 331 moves along pull rod 333 towards the direction of keeping away from angle adjusting piece 32 under the resilience force effect of first elastic piece 332, conflict locking closure 331 until drive unit 334, it is spacing to locking closure 331, avoid locking closure 331 to break away from fixing base 31, locking closure 331 unlocks angle adjusting piece 32 and fixing base 31 this moment, second angle adjusting structure 311 of fixing base 31 can rotate relative angle adjusting structure 321 of angle adjusting piece 32, in order to realize carrying out the angle adjustment to desktop 1.
In this embodiment, the outer side surface of the fixing seat 31 is concavely provided with an accommodating cavity 315, and the locking cover 331 is accommodated in the accommodating cavity 315. The structure design makes the structure of the fixing base 31 and the locking cover 331 compact and the appearance beautiful, and facilitates the assembly of the locking cover 331 and the fixing base 31, preventing the locking cover 331 from easily separating from the fixing base 31.
Specifically, the first elastic member 332 is a spring, the spring is sleeved outside the pull rod 333, one end of the spring abuts against the bottom wall of the accommodating cavity 315, and the other end of the spring abuts against the locking cap 331. The pull rod 333 is used for positioning and guiding the spring, on one hand, to facilitate assembly of the spring, and on the other hand, to ensure stability of the operation of the spring, and to prevent the spring from being pressed and inclined or bent.
In this embodiment, the driving unit 334 is a locking handle, one end of the locking handle is rotatably connected to the pull rod 333 and is provided with a cam pressing block 336, the cam pressing block 336 is provided with a blocking plane 337 and a pressing protrusion 338 located at one end of the blocking plane 337, the blocking plane 337 is used for blocking the locking cover 331, the pressing protrusion 338 is used for applying a locking force to the locking cover 331, and a main body of the locking handle is perpendicular to the blocking plane 337. The user only needs to drive the locking handle to rotate, and the desktop 1 can be locked or unlocked. When the angle of the tabletop 1 is locked, the locking mechanism 33 is in a locked state, the pressing protrusion 338 of the locking handle applies a locking force to the locking cover 331, and the main body of the locking handle is parallel to the end surface of the locking cover 331; when the angle of the desktop 1 is unlocked, the locking mechanism 33 is in the unlocked state, the blocking plane 337 of the locking handle abuts against the end surface of the locking cap 331 to block and limit the locking cap 331, and the main body of the locking handle is perpendicular to the end surface of the locking cap 331.
Specifically, the pull rod 333 is a non-circular rod, and the angle adjusting member 32, the fixing seat 31 and the lock cover 331 are all provided with non-circular holes, which are in concave-convex fit with the non-circular rod. Due to the structural design, the pull rod 333 is prevented from rotating relative to the angle adjusting piece 32, the fixed seat 31 and the lock cover 331, and the stability of the pull rod 333 is improved.
In this embodiment, the angle adjusting member 32 is rotatably connected to the table leg 2 via the folding device 5. Through setting up folding device 5 for table foot 2 can be folded relatively desktop 1, is convenient for accomodate, carry, transport and keep the desk etc..
In this embodiment, the folding device 5 includes a connecting seat 51, a clamping member 52 and a second elastic member 53, the bottom end of the connecting seat 51 is sleeved outside the top end of the table leg 2, the angle adjusting member 32 is rotatably connected with the top end of the connecting seat 51, the clamping member 52 is arranged in the cavity of the connecting seat 51, the clamping member 52 is arranged between the connecting seat 51 and the angle adjusting member 32 in a lifting manner, one end of the second elastic member 53 abuts against the bottom surface of the clamping member 52, the other end of the second elastic member 53 abuts against the bottom wall of the cavity of the connecting seat 51, one end of the clamping member 52, which is far away from the second elastic member 53, is provided with a clamping protrusion 54, the angle adjusting member 32 is provided with a plurality of clamping grooves 55, the clamping grooves 55 are arranged in an arc shape, and the clamping protrusion 54 is in concave-convex fit with the clamping grooves 55; second elastic component 53 is the spring, the quantity of second elastic component 53 is a plurality of, the vertical setting of second elastic component 53, protruding 54 of card and draw-in groove 55 all are circular-arcly, and second elastic component 53 applys the elasticity towards being close to angle adjusting piece 32 to joint 52 for protruding 54 of card of joint 52 contradicts with angle adjusting piece 32's lateral wall all the time. When needs folding table foot 2, the user only needs to apply inward effort to table foot 2, make table foot 2 take the relative angle adjusting part 32 of connecting seat 51 to rotate, second elastic component 53 and the synchronous rotation of joint piece 52 of the interior intracavity of placing connecting seat 51 in pivoted connecting seat 51 drives, until the protruding 54 of card of joint piece 52 rotates to another draw-in groove 55 of angle adjusting part 32 in a draw-in groove 55 of angle adjusting part 32, control in protruding 54 rotates to the draw-in groove 55 that corresponds on the angle adjusting part 32 according to the folding angle of user to table foot 2, in order to realize folding table foot 2. When the table legs 2 need to be opened, only reverse operation is needed, and the operation is simple, convenient and fast, and time and labor are saved.
Preferably, the number of the clamping grooves 55 is two, and the two clamping grooves 55 are located at two ends of the quarter-circle arc, that is, the included angle between the two clamping grooves 55 is 90 °. The user only needs to drive the table legs 2 to rotate 90 degrees relative to the angle adjusting piece 32, and then the table legs 2 can be unfolded or folded. When the table legs 2 are opened, the table legs 2 are vertical to the table top 1; when the table legs 2 are folded, the table legs 2 are stored under the table top 1, and the table legs 2 are parallel to the table top 1.
In this embodiment, the tabletop 1 is provided with a supporting plate 6; the supporting plate 6 can limit and support articles on the tabletop 1; especially when desktop 1 inclines, article on the desktop 1 slide and drop to ground along the direction of slope easily, cause the damage of article easily, the utility model discloses a backup pad 6 supports the article on the desktop 1, can reduce the emergence of above-mentioned accident, the security when having improved the desk and using. Preferably, the tabletop 1 is concavely provided with a sliding groove 61, the sliding groove 61 is arranged in parallel with the placing groove 4, the placing groove 4 is arranged on the upper side of the tabletop 1, the sliding groove 61 is arranged on the lower side of the tabletop 1, the length directions of the sliding groove 61 and the placing groove 4 are both parallel to the length direction of the tabletop 1, the supporting plate 6 is arranged in the sliding groove 61 in a sliding manner, the supporting plate 6 slides on the tabletop 1 along the sliding groove 61 to adjust the position of the supporting plate 6 on the tabletop 1, and the practicability is high.
Preferably, the number of angle adjusting device 3, folding device 5 and table foot 2 is two, and angle adjusting device 3, folding device 5 and the setting of table foot 2 one-to-one, the shape of table foot 2 is isosceles trapezoid, and two table feet 2 symmetry set up in the bottom surface of desktop 1. This structural design has improved the structural stability of desk for the desk atress is even, and it is more firm to use.
Preferably, the bottom of the table leg 2 is provided with a non-slip mat 62, and the non-slip mat 62 is a rubber member; due to the structural design, the anti-skid pad 62 not only plays a role in skid resistance, improves the stability of the table, but also plays a role in buffering and shock absorption, avoids hard impact collision between the table feet 2 and external structures (such as the ground and the like), prolongs the service life of the table feet 2, and reduces noise.
All the technical features in the embodiment can be freely combined according to actual needs.
The above-mentioned embodiment is the utility model discloses the implementation scheme of preferred, in addition, the utility model discloses can also realize by other modes, any obvious replacement is all within the protection scope of the utility model under the prerequisite that does not deviate from this technical scheme design.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023120620.9U CN214258319U (en) | 2020-12-22 | 2020-12-22 | A table with adjustable table top angle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023120620.9U CN214258319U (en) | 2020-12-22 | 2020-12-22 | A table with adjustable table top angle |
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| Publication Number | Publication Date |
|---|---|
| CN214258319U true CN214258319U (en) | 2021-09-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023120620.9U Active CN214258319U (en) | 2020-12-22 | 2020-12-22 | A table with adjustable table top angle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214258319U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116114999A (en) * | 2023-03-17 | 2023-05-16 | 陈志海 | Angle-adjustable table |
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2020
- 2020-12-22 CN CN202023120620.9U patent/CN214258319U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116114999A (en) * | 2023-03-17 | 2023-05-16 | 陈志海 | Angle-adjustable table |
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Effective date of registration: 20250126 Address after: Room 105, No. 2 Dongshu 5th Road, Xiegang Town, Dongguan City, Guangdong Province 523590 Patentee after: Dongguan Guanpeng Intelligent Technology Co.,Ltd. Country or region after: China Address before: Zhulin street, Zhulin Town, Qichun County, Huanggang City, Hubei Province 435300 Patentee before: Chen Zhihai Country or region before: China |
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