CN214240271U - Portable drawing board of product design - Google Patents

Portable drawing board of product design Download PDF

Info

Publication number
CN214240271U
CN214240271U CN202023134209.7U CN202023134209U CN214240271U CN 214240271 U CN214240271 U CN 214240271U CN 202023134209 U CN202023134209 U CN 202023134209U CN 214240271 U CN214240271 U CN 214240271U
Authority
CN
China
Prior art keywords
drawing board
rectangular
wall
fixedly connected
block
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202023134209.7U
Other languages
Chinese (zh)
Inventor
李飞
刘�东
张楠
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hebei University of Science and Technology
Original Assignee
Hebei University of Science and Technology
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hebei University of Science and Technology filed Critical Hebei University of Science and Technology
Priority to CN202023134209.7U priority Critical patent/CN214240271U/en
Application granted granted Critical
Publication of CN214240271U publication Critical patent/CN214240271U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Toys (AREA)

Abstract

The utility model belongs to the technical field of the drawing board, especially, for a portable drawing board of product design, including rectangle piece and second drawing board, the outside slip cover of second drawing board is equipped with first drawing board, first drawing board rotates with the rectangle piece to be connected, the U-shaped cavity has been seted up on the first drawing board, and the front side inner wall and the rear side inner wall of U-shaped cavity all rotate and are connected with two fixed pulleys, and the left side inner wall of U-shaped cavity rotates and is connected with first T shape pole, and the left end of first T shape pole extends outside first drawing board, the one end of the equal fixedly connected with flexible steel cable in both sides of first T shape pole, the outside of flexible steel cable respectively with the outside sliding connection of two fixed pulleys that correspond, the front side inner wall and the equal fixedly connected with connecting axle of rear side inner wall of U-shaped cavity. The utility model discloses a set up first spring, second drawing board, first T shape pole, flexible steel cable and circular pole and cooperate, be not portable and can not increase the problem of the volume of drawing board through having solved current drawing board placer.

Description

Portable drawing board of product design
Technical Field
The utility model relates to a drawing board technical field specifically is a portable drawing board of product design.
Background
The product design is a process for converting a certain purpose or requirement into a specific physical form or tool, and is a creative activity process for expressing a planning, imagining and problem solving method through a specific vector. In the process, the shape of the product is shown in a plane or a three-dimensional form through the combination of various elements such as lines, symbols, numbers, colors and the like.
Present drawing board is when drawing, all need use frame easel or triangle easel frame to fix, occupation space is great when frame easel and triangle easel use to only can place a drawing board, can not increase the volume of drawing board, and carry inconveniently, it has brought inconvenience for the drawing, and can not effectively store drawing board and instrument after the drawing is accomplished, can not satisfy the user demand, therefore we have proposed a portable drawing board of product design and have been used for solving above-mentioned problem.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
Not enough to prior art, the utility model provides a portable drawing board of product design has solved the problem that current drawing board placer is not portable and can not increase the volume of drawing board.
(II) technical scheme
In order to achieve the above object, the utility model provides a following technical scheme: a portable drawing board for product design comprises a rectangular block and a second drawing board, wherein a first drawing board is sleeved on the outer side of the second drawing board in a sliding mode, the first drawing board is connected with the rectangular block in a rotating mode, a U-shaped cavity is formed in the first drawing board, two fixed pulleys are respectively connected with the front inner wall and the rear inner wall of the U-shaped cavity in a rotating mode, a first T-shaped rod is connected with the left inner wall of the U-shaped cavity in a rotating mode, the left end of the first T-shaped rod extends out of the first drawing board, one end of a flexible steel rope is fixedly connected with the two sides of the first T-shaped rod, the outer sides of the flexible steel ropes are respectively connected with the outer sides of the two corresponding fixed pulleys in a sliding mode, a connecting shaft is fixedly connected with the front inner wall and the rear inner wall of the U-shaped cavity, a moving shaft is sleeved on the outer side of the connecting shaft in a sliding mode, and a first spring is fixedly connected between the two ends, far away from each other ends of the moving shaft and the front inner wall and the rear inner wall of the U-shaped cavity respectively, the outside fixedly connected with square plate of removal axle, the other end of flexible steel cable and the square plate fixed connection who corresponds, first spring sliding sleeve establish the outside at the removal axle that corresponds, two first rectangular channels have all been seted up to the front side and the rear side of second drawing board, two the one end that the removal axle is close to each other all inlays and is equipped with first ball, first ball and second drawing board cooperate.
As a preferred technical proposal of the utility model, a clip rod is arranged below the first drawing board and is rotationally connected with the first drawing board, a second rectangular groove is arranged on the upper surface of the rectangular block, a plurality of clamping strips are fixedly connected with the inner wall of the bottom of the second rectangular groove and are movably contacted with the clip rod, a third rectangular groove is arranged on the left side of the rectangular block, a rectangular box with an opening at the top is slidably sleeved on the inner wall of the third rectangular groove, a first trapezoid block is fixedly connected with the lower surface of the rectangular box, a first inclined plane is arranged on the right side of the first trapezoid block and is provided with a fourth rectangular groove, a rectangular rod is arranged on the left side of the rectangular block, a rectangular plate is slidably sleeved on the outer side of the rectangular rod and is fixedly connected with the rectangular block, a round block is fixedly connected with the bottom end of the rectangular rod, a second spring is fixedly connected between the lower surface of the rectangular plate and the upper surface of the round block, the second spring is sleeved on the outer side of the rectangular rod in a sliding manner, a second ball is embedded at the top end of the rectangular rod and matched with an inclined plane of the first trapezoidal block, the lower surface of the first drawing board is fixedly connected with the second trapezoidal block, the right side of the second trapezoidal block is arranged as a second inclined plane and provided with a fifth rectangular groove, the upper surface of the rectangular block is provided with a sixth rectangular groove, a cross rod is fixedly connected between the left inner wall and the right inner wall of the sixth rectangular groove, the outer side of the cross rod is sleeved with a vertical plate in a sliding manner, a third spring is fixedly connected between the right side of the vertical plate and the right inner wall of the sixth rectangular groove and sleeved on the outer side of the cross rod in a sliding manner, a circular rod is fixedly connected on the left side of the vertical plate, a third ball is embedded at the left end of the circular rod and matched with the second trapezoidal block, and a second T-shaped rod is fixedly connected on the right side of the vertical plate, the right end of the second T-shaped rod extends to the outside of the rectangular block, and the rectangular block is rotatably sleeved on the outer side of the second T-shaped rod.
As a preferred technical scheme of the utility model, the right side of second drawing board and the equal fixedly connected with arc handle in front side of rectangular block.
As a preferred technical scheme of the utility model, first rectangular hole, the inner wall in first rectangular hole and the outside sliding connection of rectangle pole have been seted up to the upper surface of rectangular plate.
As a preferred technical scheme of the utility model, the circular recess has all been seted up to the one end that two removal axles were kept away from each other, the inner wall of circular recess and the outside sliding connection of the connecting axle that corresponds.
As a preferred technical scheme of the utility model, the circular port has been seted up to the left side inner wall of U-shaped cavity, and the circular port internal fixation cover is equipped with the bearing, the inner circle of bearing and the outside fixed connection of first T shape pole.
As a preferred technical scheme of the utility model, seventh rectangular channel, the inner wall of seventh rectangular channel and the outside sliding connection of second drawing board have been seted up on the right side of first drawing board.
(III) advantageous effects
Compared with the prior art, the utility model provides a portable drawing board of product design possesses following beneficial effect:
this portable drawing board of product design cooperatees through first spring, second drawing board, first T shape pole, flexible steel cable and circular rod, drives flexible steel cable through first T shape pole and removes, under the cooperation of second drawing board, has solved the problem that current drawing board placer is not portable and can not increase the volume of drawing board.
Drawings
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a schematic left-side view of the three-dimensional structure of the present invention;
FIG. 3 is a schematic diagram of the right-side perspective structure of the present invention;
FIG. 4 is a schematic view of the sectional three-dimensional structure of the present invention;
FIG. 5 is an enlarged perspective view of portion A of FIG. 2;
FIG. 6 is an enlarged perspective view of portion B of FIG. 4;
fig. 7 is a schematic view of the internal planar structure of the U-shaped cavity.
In the figure: 1. a rectangular block; 2. a first drawing board; 3. a second drawing board; 4. a first T-bar; 5. a flexible steel cord; 6. a fixed pulley; 7. a connecting shaft; 8. a movable shaft; 9. a first spring; 10. a square plate; 11. a first rectangular groove; 12. a clip rod; 13. clamping the strip; 14. a rectangular box; 15. a first trapezoidal block; 16. a rectangular bar; 17. a rectangular plate; 18. a circular block; 19. a second spring; 20. a cross bar; 21. a vertical plate; 22. a third spring; 23. a circular rod; 24. a second T-bar; 25. a second trapezoidal block.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Examples
Referring to fig. 1-7, the present invention provides the following technical solutions: a portable drawing board for product design comprises a rectangular block 1 and a second drawing board 3, wherein a first drawing board 2 is sleeved on the outer side of the second drawing board 3 in a sliding mode, the first drawing board 2 is rotatably connected with the rectangular block 1, a U-shaped cavity is formed in the first drawing board 2, two fixed pulleys 6 are rotatably connected with the front inner wall and the rear inner wall of the U-shaped cavity, a first T-shaped rod 4 is rotatably connected with the left inner wall of the U-shaped cavity, the left end of the first T-shaped rod 4 extends out of the first drawing board 2, one end of a flexible steel rope 5 is fixedly connected with each of two sides of the first T-shaped rod 4, the outer sides of the flexible steel ropes 5 are respectively and slidably connected with the outer sides of the two corresponding fixed pulleys 6, a connecting shaft 7 is fixedly connected with each of the front inner wall and the rear inner wall of the U-shaped cavity, a moving shaft 8 is sleeved on the outer side of the connecting shaft 7 in a sliding mode, and a first spring 9 is fixedly connected between each of the two moving shafts 8 and the front inner wall and the rear inner wall of the U-shaped cavity, remove the outside fixedly connected with square plate 10 of axle 8, the other end of flexible steel cable 5 and the square plate 10 fixed connection who corresponds, first spring 9 slip cover is established in the outside of the removal axle 8 that corresponds, and two first rectangular channels 11 have all been seted up to the front side and the rear side of second drawing board 3, and the one end that the removal axle 8 of two is close to each other all inlays and is equipped with first ball, and first ball cooperatees with second drawing board 3.
In this embodiment, the fixed pulley 6 functions to reduce friction.
Specifically, a clip 12 is arranged below the first drawing board 2, the clip 12 is rotatably connected with the first drawing board 2, a second rectangular groove is formed in the upper surface of the rectangular block 1, a plurality of clip strips 13 are fixedly connected to the bottom inner wall of the second rectangular groove, the clip strips 13 are movably contacted with the clip 12, a third rectangular groove is formed in the left side of the rectangular block 1, a rectangular box 14 with an opening at the top is slidably sleeved on the inner wall of the third rectangular groove, a first trapezoidal block 15 is fixedly connected to the lower surface of the rectangular box 14, a first inclined surface is formed on the right side of the first trapezoidal block 15, a fourth rectangular groove is formed in the right side of the rectangular block 1, a rectangular rod 16 is arranged on the left side of the rectangular block 1, a rectangular plate 17 is slidably sleeved on the outer side of the rectangular rod 16, the rectangular plate 17 is fixedly connected with the rectangular block 1, a circular block 18 is fixedly connected to the bottom end of the rectangular rod 16, a second spring 19 is fixedly connected between the lower surface of the rectangular plate 17 and the upper surface of the circular block 18, the second spring 19 is sleeved on the outer side of the rectangular rod 16 in a sliding manner, the top end of the rectangular rod 16 is embedded with a second ball, the second ball is matched with the inclined surface of the first trapezoidal block 15, the lower surface of the first drawing board 2 is fixedly connected with a second trapezoidal block 25, the right side of the second trapezoidal block 25 is provided with a second inclined surface and a fifth rectangular groove, the upper surface of the rectangular block 1 is provided with a sixth rectangular groove, a cross rod 20 is fixedly connected between the left inner wall and the right inner wall of the sixth rectangular groove, the outer side of the cross rod 20 is sleeved with a vertical plate 21 in a sliding manner, a third spring 22 is fixedly connected between the right side of the vertical plate 21 and the right inner wall of the sixth rectangular groove, the third spring 22 is sleeved on the outer side of the cross rod 20 in a sliding manner, the left side of the vertical plate 21 is fixedly connected with a circular rod 23, the left end of the circular rod 23 is embedded with a third ball, the third ball is matched with the second trapezoidal block 25, the right side of the vertical plate 21 is fixedly connected with a second T-shaped rod 24, the right end of the second T-shaped rod 24 extends out of the rectangular block 1, and the rectangular block 1 is rotatably sleeved on the outer side of the second T-shaped rod 24.
In this embodiment, the second ball and the third ball function to reduce friction.
Specifically, the right side of second drawing board 3 and the equal fixedly connected with arc handle in front side of rectangular block 1.
In this embodiment, through the effect that the arc handle has played the personnel of being convenient for use.
Specifically, a first rectangular hole is formed in the upper surface of the rectangular plate 17, and the inner wall of the first rectangular hole is slidably connected with the outer side of the rectangular rod 16.
In this embodiment, the first rectangular hole serves to position the rectangular rod 16, so that the rectangular rod 16 can only move up and down.
Specifically, circular grooves are formed in the ends, far away from each other, of the two movable shafts 8, and the inner walls of the circular grooves are connected with the outer sides of the corresponding connecting shafts 7 in a sliding mode.
In this embodiment, the circular groove serves to position the moving shaft 8, so that the moving shaft 8 can only move forward and backward.
Specifically, a circular hole is formed in the inner wall of the left side of the U-shaped cavity, a bearing is fixedly sleeved in the circular hole, and the inner ring of the bearing is fixedly connected with the outer side of the first T-shaped rod 4.
In this embodiment, the bearing serves to position the first T-shaped rod 4, so that the first T-shaped rod 4 does not shift when rotating.
Specifically, a seventh rectangular groove is formed in the right side of the first drawing board 2, and the inner wall of the seventh rectangular groove is connected with the outer side of the second drawing board 3 in a sliding mode.
In this embodiment, the seventh rectangular groove functions to position the second drawing board 3.
The utility model discloses a theory of operation and use flow: when the second drawing board 3 needs to be used, the first T-shaped rod 4 is rotated, the first T-shaped rod 4 winds the two flexible steel ropes 5 in the rotating process, the flexible steel ropes 5 slide on the outer sides of the corresponding fixed pulleys 6, the flexible steel ropes 5 pull the corresponding movable shafts 8 to move in the moving process, the movable shafts 8 compress the corresponding first springs 9 in the moving process, the movable shafts 8 are separated from the two first rectangular grooves 11 on the right side, the arc-shaped handles are pulled outwards, the arc-shaped handles drive the second drawing board 3 to be drawn out from the first drawing board 2, when the movable shafts 8 are aligned with the two first rectangular grooves 11 on the left side, the first springs 9 reset at the moment, the first springs 9 drive the corresponding movable shafts 8 to be clamped into the corresponding first rectangular grooves 11, the second drawing board 3 can be fixed at the moment, when the second drawing board 3 needs to be collected, the same principle, the second drawing board 3 can be put into the first drawing board 2, and the clip bar 13 is separated from the clip bar 12;
the first drawing board 2 is moved downwards, the first drawing board 2 drives the second trapezoidal block 25 to move, when the second trapezoidal block 25 enters the sixth rectangular groove, the second trapezoidal block 25 extrudes a third ball, the third ball drives the vertical plate 21 to move rightwards through the circular rod 23 under the action of the extrusion force, the vertical plate 21 extrudes the third spring 22 in the moving process, when the third ball is aligned with the fifth rectangular groove, the third spring 22 resets, the third spring 22 drives the circular rod 23 to be clamped into the fifth rectangular groove through the vertical plate 21, and therefore the effect of fixing the first drawing board 2 is achieved;
promote rectangle box 14 right, rectangle box 14 drives first trapezoidal piece 15 and removes, first trapezoidal piece 15 extrudees to the second ball at its inclined plane of in-process that removes, the second ball drives rectangular rod 16 and moves down and stretch second spring 19, when rectangular rod 16 aligns with the fourth rectangular channel, second spring 19 resets this moment, thereby it makes rectangle box 14 fixed to drive rectangular rod 16 card income to the fourth rectangular channel, alright reach portable purpose this moment.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (7)

1. The utility model provides a portable drawing board of product design, includes rectangular block (1) and second drawing board (3), its characterized in that: the outside slip cover of second drawing board (3) is equipped with first drawing board (2), first drawing board (2) rotates with rectangular block (1) and is connected, seted up the U-shaped cavity on first drawing board (2), the front side inner wall and the rear side inner wall of U-shaped cavity all rotate and be connected with two fixed pulleys (6), the left side inner wall of U-shaped cavity rotates and is connected with first T shape pole (4), outside the left end of first T shape pole (4) extends to first drawing board (2), the equal fixedly connected with one end of flexible steel cable (5) in both sides of first T shape pole (4), the outside of flexible steel cable (5) respectively with the outside sliding connection of two fixed pulleys (6) that correspond, the front side inner wall and the equal fixedly connected with connecting axle (7) of rear side inner wall of U-shaped cavity, the outside slip cover of connecting axle (7) is equipped with removal axle (8), two removal axle (8) one end of keeping away from each other respectively with between the front side inner wall and the rear side inner wall of U-shaped cavity and the rear side inner wall fixedly connected with fixed pulley (7), removal axle (8) Decide to be connected with first spring (9), the outside fixedly connected with square slab (10) of removal axle (8), the other end of flexible steel cable (5) and the square slab (10) fixed connection that corresponds, first spring (9) slip cap is established in the outside of the removal axle (8) that corresponds, two first rectangular channel (11), two have all been seted up to the front side and the rear side of second drawing board (3) the one end that removes axle (8) and be close to each other all is inlayed and is equipped with first ball, first ball cooperatees with second drawing board (3).
2. The portable drawing board for product design according to claim 1, wherein: a clip rod (12) is arranged below the first drawing board (2), the clip rod (12) is rotatably connected with the first drawing board (2), a second rectangular groove is formed in the upper surface of the rectangular block (1), a plurality of clamping strips (13) are fixedly connected to the inner wall of the bottom of the second rectangular groove, the clamping strips (13) are movably contacted with the clip rod (12), a third rectangular groove is formed in the left side of the rectangular block (1), a rectangular box (14) with an opening at the top is slidably sleeved on the inner wall of the third rectangular groove, a first trapezoidal block (15) is fixedly connected to the lower surface of the rectangular box (14), a first inclined plane is formed in the right side of the first trapezoidal block (15), a fourth rectangular groove is formed in the left side of the rectangular block (1), a rectangular plate (17) is slidably sleeved on the outer side of the rectangular rod (16), and the rectangular plate (17) is fixedly connected with the rectangular block (1), the bottom end of the rectangular rod (16) is fixedly connected with a circular block (18), a second spring (19) is fixedly connected between the lower surface of the rectangular plate (17) and the upper surface of the circular block (18), the second spring (19) is slidably sleeved on the outer side of the rectangular rod (16), a second ball is embedded at the top end of the rectangular rod (16) and matched with the inclined surface of the first trapezoidal block (15), a second trapezoidal block (25) is fixedly connected to the lower surface of the first drawing board (2), the right side of the second trapezoidal block (25) is provided with a second inclined surface and a fifth rectangular groove, the upper surface of the rectangular block (1) is provided with a sixth rectangular groove, a cross rod (20) is fixedly connected between the left inner wall and the right inner wall of the sixth rectangular groove, a vertical plate (21) is slidably sleeved on the outer side of the cross rod (20), and a third spring (22) is fixedly connected between the right side of the vertical plate (21) and the right inner wall of the sixth rectangular groove, the outside at horizontal pole (20) is established to third spring (22) slip cover, the left side fixedly connected with round bar (23) of riser (21), the left end of round bar (23) is inlayed and is equipped with the third ball, and the third ball cooperatees with second trapezoidal piece (25), the right side fixedly connected with second T shape pole (24) of riser (21), the right-hand member of second T shape pole (24) extends to outside rectangular block (1), and rectangular block (1) rotates the cover and establishes the outside at second T shape pole (24).
3. The portable drawing board for product design according to claim 1, wherein: the right side of second drawing board (3) and the equal fixedly connected with arc handle in front side of rectangle piece (1).
4. The portable drawing board for product design according to claim 2, wherein: a first rectangular hole is formed in the upper surface of the rectangular plate (17), and the inner wall of the first rectangular hole is connected with the outer side of the rectangular rod (16) in a sliding mode.
5. The portable drawing board for product design according to claim 1, wherein: circular grooves are formed in the ends, far away from each other, of the two moving shafts (8), and the inner walls of the circular grooves are connected with the outer sides of the corresponding connecting shafts (7) in a sliding mode.
6. The portable drawing board for product design according to claim 1, wherein: a circular hole is formed in the inner wall of the left side of the U-shaped cavity, a bearing is fixedly sleeved in the circular hole, and the inner ring of the bearing is fixedly connected with the outer side of the first T-shaped rod (4).
7. The portable drawing board for product design according to claim 1, wherein: and a seventh rectangular groove is formed in the right side of the first drawing board (2), and the inner wall of the seventh rectangular groove is connected with the outer side of the second drawing board (3) in a sliding manner.
CN202023134209.7U 2020-12-23 2020-12-23 Portable drawing board of product design Active CN214240271U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202023134209.7U CN214240271U (en) 2020-12-23 2020-12-23 Portable drawing board of product design

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202023134209.7U CN214240271U (en) 2020-12-23 2020-12-23 Portable drawing board of product design

Publications (1)

Publication Number Publication Date
CN214240271U true CN214240271U (en) 2021-09-21

Family

ID=77741505

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202023134209.7U Active CN214240271U (en) 2020-12-23 2020-12-23 Portable drawing board of product design

Country Status (1)

Country Link
CN (1) CN214240271U (en)

Similar Documents

Publication Publication Date Title
CN215185486U (en) Cable cutting equipment for communication construction
CN214240271U (en) Portable drawing board of product design
CN106112903B (en) A kind of rod-pulling device and its wire harness coiling die for special purpose
CN214162944U (en) Toolbox for art design
CN2790395Y (en) Line-pull wringing mop
CN213782427U (en) Folding data line
CN210745284U (en) Mobile phone shell with screen protection function
CN214170175U (en) Protection device for road and bridge construction engineering
CN213370421U (en) Draw-bar box with can dismantle handbag
CN213908902U (en) Composite light high-elastic antifouling fiber case
CN216328213U (en) Join in marriage net live working specialized tool box
CN210380036U (en) Communication engineering is with spreading traditional thread binding putting
CN211264506U (en) Display device based on visual intelligent teaching robot
CN213944285U (en) Dustproof outer cover for chromatographic column
CN213594313U (en) Handcart sliding guide groove
CN216770570U (en) Geological engineering survey and drawing sopwith staff device convenient to carry and use
CN217711820U (en) Power wiring planning device for BIM building
CN210539419U (en) Suitcase with telescopic moving wheels
CN210248930U (en) Table leg connecting device convenient to move
CN214283872U (en) Drawing frame for product designer
CN212423944U (en) Containing box for construction engineering cost
CN211942718U (en) File folder for receiving letters and visitors
CN218182770U (en) Digital low-voltage drawer type switch cabinet
CN215042875U (en) Detachable stainless steel handcart
CN210734198U (en) Thread barrel transport trolley for spinning

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant