Lifting writing board

Abstract

The utility model discloses a lifting writing board which comprises a writing board body and a base, the writing board body is connected with a lifting pipe, a vertical pipe is arranged on the base, and the lifting pipe is sleeved with the vertical pipe in an up-down moving mode. A locking assembly is arranged between the lifting pipe and the vertical pipe and comprises a connector sleeve and a locking piece, and the connector sleeve is connected into the upper end of the vertical pipe and arranged outside the lifting pipe in a sleeving mode. A locking sheet capable of moving in the radial direction is arranged on the joint sleeve; a locking hole is formed in the side wall of the vertical pipe, the end of the locking piece can penetrate through the locking hole to abut against the locking piece, and the locking piece can abut against the outer wall of the lifting pipe to limit sliding of the lifting pipe. The locking device of the lifting writing board cannot scratch the outer wall of the lifting pipe in the using process, and the appearance integrity of the lifting pipe is maintained.

Description

Technical Field

[0001] This utility model relates to the field of writing instrument technology, and more specifically to a height-adjustable writing board. Background Technology

[0002] A writing board is a flat surface for writing, such as a whiteboard, blackboard, or glass notice board. It is an erasable writing tool, typically used for teaching, meeting discussions, or personal and family note-taking. For ease of use, writing boards are equipped with a movable stand to allow for easy repositioning.

[0003] A height-adjustable writing tablet is a writing tablet that can be moved up and down via mechanical or electric means to accommodate users of different heights. Height-adjustable writing tablets improve flexibility and convenience, ensuring users can write and present at a comfortable height.

[0004] Currently available height-adjustable writing tablets on the market offer multiple functions such as mobility, angle adjustment, and height adjustment. While these tablets have many advantages, they also have the following drawbacks: After the tablet is positioned, it is locked in place using fastening screws. However, in existing height-adjustable writing tablets, the inner end of the fastening screw directly abuts against the outer wall of the lifting tube, which can easily scratch the outer wall of the lifting tube during use, thus affecting its appearance. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a lifting writing board, wherein the locking device of the lifting writing board will not scratch the outer wall of the lifting tube during use, thus maintaining the appearance integrity of the lifting tube.

[0006] The technical solution of this utility model is to provide a lifting writing board with the following structure: a writing board and a base; the writing board is connected to a lifting tube; a vertical tube is provided on the base; the lifting tube is movably fitted inside the vertical tube; a locking assembly is provided between the lifting tube and the vertical tube; the locking assembly includes...

[0007] A connector sleeve is connected to the upper end of the riser and fitted onto the outside of the lifting pipe; the connector sleeve is provided with a locking piece that can move radially.

[0008] The locking component has a locking hole on the side wall of the riser, and the end of the locking component can pass through the locking hole and abut against the locking plate. The locking plate can abut against the outer wall of the riser to restrict the sliding of the riser.

[0009] With the above structure, the lifting writing board of this utility model has the following advantages compared with the prior art:

[0010] The locking assembly of this utility model's lifting writing board includes a connector sleeve and a locking element. The connector sleeve is connected to the upper end of the riser and fitted onto the outside of the lifting tube. The connector sleeve is equipped with a radially movable locking plate. During the locking process, the end of the locking element passes through the locking hole and abuts against the locking plate. The locking plate abuts against the outer wall of the lifting tube to restrict the sliding of the lifting tube. The locking plate presses down on the lifting tube, and the contact area between the locking plate and the lifting tube is large, so the outer wall of the lifting tube will not be damaged during the pressing process. After the locking element is released, the locking plate also releases the lifting tube. At this time, during the descent or elevation of the lifting tube, the locking plate will not scratch the outer wall of the lifting tube. Therefore, the appearance of the lifting tube is maintained intact.

[0011] As an improvement, the connector sleeve includes a limiting head and a connecting sleeve, with one end of the connecting sleeve connected to one end of the limiting head; the connecting sleeve is inserted into the upper end of the riser, and the limiting head is positioned on the upper surface of the riser. With this structure, the connector sleeve is simple in design and easy to assemble.

[0012] As an improvement, deformation grooves are provided on both sides of the locking plate. With this structure, the locking plate is easier to manufacture and has a better deformation effect.

[0013] As an improvement, the outer surface of the side wall of the connecting pipe sleeve is provided with multiple positioning ribs, which abut against the inner wall of the riser. With this structure, the connecting pipe sleeve and the riser fit more tightly, and the assembly structure is more reliable.

[0014] As an improvement, the inner diameter of the connecting sleeve is matched with the outer diameter of the lifting pipe. With this structure, the lifting and lowering of the lifting pipe is more stable.

[0015] As an improvement, a reinforcing plate is provided on the inner wall of the riser, and the reinforcing plate has a connecting hole that is aligned with the locking hole; the end of the locking member can pass through the locking hole and the connecting hole and abut against the locking plate. With this structure, the reinforcing plate can increase the strength of the riser.

[0016] As an improvement, the locking component includes a knob and a screw, and the connecting hole is a threaded hole, allowing the end of the screw to pass through the locking hole and be threaded into it. With this structure, the locking component is simple in design, and assembly between the locking component and the reinforcing plate is convenient.

[0017] As an improvement, a limiting plate is provided at the lower end of the lifting pipe, and a limiting protrusion is provided on the inner wall of the riser. The limiting plate is located below the limiting protrusion. With this structure, the limiting protrusion can limit the limiting plate, that is, limit the lifting pipe.

[0018] As an improvement, the limiting head is equipped with a slow-descent structure, which includes an inclined slide rail and slow-descent rollers. The slow-descent rollers are slidably engaged with the inclined slide rail. When the lifting tube descends, the slow-descent rollers move towards the lower end of the inclined slide rail and gradually press against the outer wall of the lifting tube while rolling. When the lifting tube rises, the slow-descent rollers move towards the upper end of the inclined slide rail and gradually release from the outer wall of the lifting tube while rolling. With this structure, the slow-descent structure can gradually press against the lifting tube during descent, thereby slowing down the lifting tube and achieving a slow-descent effect.

[0019] As an improvement, the upper end of the lifting tube is provided with a connecting plate, both sides of which are beveled, and the connecting plate is narrower at the top and wider at the bottom. The back of the writing board has two slots that match the beveled sides of the connecting plate, and the beveled sides of the connecting plate are inserted into the two slots one-to-one. With this structure, the assembly of the writing board and the connecting plate is simple, and disassembly is convenient. The narrow upper and wide lower structure of the connecting plate can limit the movement of the writing board. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of a utility model lifting writing board.

[0021] Figure 2 This is a partial exploded structural diagram of the lifting writing board of the utility model.

[0022] Figure 3 This is an exploded structural diagram of the lifting tube section of the utility model lifting writing board.

[0023] Figure 4 This is an exploded structural diagram of the riser section of the utility model's lifting writing board.

[0024] Figure 5 This is a partial cross-sectional structural diagram of the riser tube of the utility model lifting writing board.

[0025] Figure 6 This is a schematic diagram of the connector sleeve for a utility model lifting writing board.

[0026] The figure shows: 1. Writing board, 101. Slot, 2. Base, 3. Lifting tube, 301. Limiting piece, 302. First through hole, 303. Second through hole, 4. Upright tube, 401. Limiting protrusion, 402. Locking hole, 5. Roller, 6. Connector sleeve, 601. Seat body, 602. Top cover, 603. Connecting sleeve, 604. Positioning rib, 605. Deformation groove, 606. Locking piece, 607. Insertion groove, 7. Locking component, 701. Knob, 702. Screw, 8. Reinforcing piece, 801. Connecting hole, 9. Slow-down roller, 10. Track plate, 1001. Angled hole, 11. Connecting plate, 1101. Angled edge, 1102. Fixing bracket, 1103. First fixing hole, 1104. Angle adjustment hole, 12. First fastener, 13. Second fastener. Detailed Implementation

[0027] To better understand this application, various aspects of this application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely illustrative of exemplary embodiments of this application and are not intended to limit the scope of this application in any way. Throughout the specification, the same reference numerals refer to the same elements.

[0028] In the accompanying drawings, the thickness, size, and shape of the objects have been slightly exaggerated for illustrative purposes. The drawings are for illustrative purposes only and are not drawn to scale.

[0029] It should also be understood that the terms “comprising,” “having,” “including,” “containing,” and “comprising”, when used in this specification, indicate the presence of the stated features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or combinations thereof.

[0030] like Figures 1 to 6 As shown in the illustration, this specific embodiment discloses a height-adjustable writing board, including a writing board 1 and a base 2. The writing board 1 is connected to a lifting tube 3, and the base 2 is provided with a vertical tube 4. The lifting tube 3 is movably fitted into the vertical tube 4. The bottom surface of the base 2 is provided with casters 5 for easy repositioning.

[0031] A locking assembly is provided between the riser pipe 3 and the vertical pipe 4. The locking assembly includes a connector sleeve 6 and a locking element 7. The connector sleeve 6 includes a limiting head and a connecting sleeve 603. One end of the connecting sleeve 603 is connected to one end of the limiting head, and the connecting sleeve 603 and the limiting head are integrally formed. The connecting sleeve 603 is inserted into the upper end of the vertical pipe 4, and the limiting head is positioned on the upper end surface of the vertical pipe 4. The connecting sleeve 603 serves as a connector, and the limiting head serves as a limiter. Multiple positioning ribs 604 are provided on the outer surface of the side wall of the connecting sleeve 603. The positioning ribs 604 are evenly distributed around the circumference of the connecting sleeve 603. The positioning ribs 604 abut against the inner wall of the vertical pipe 4, which can ensure that the connecting sleeve 603 is tightly fitted inside the vertical pipe 4 and prevent it from coming out during use.

[0032] The lower end of the lifting pipe 3 passes through the connector sleeve 6 and enters the riser 4. The inner diameter of the connector sleeve 6 matches the outer diameter of the lifting pipe 3. A limiting piece 301 is provided at the lower end of the lifting pipe 3, and a limiting protrusion 401 is provided on the inner wall of the riser 4. The limiting piece 301 is located below the limiting protrusion 401. With this structure, the lifting stroke of the lifting pipe 3 is limited, and the lifting pipe 3 is prevented from being overlifted and dislodged.

[0033] The side wall of the connecting sleeve 603 is provided with two deformation grooves 605, which are arranged parallel to each other. A locking piece 606 is formed on the side wall between the two deformation grooves 605, where the smaller area is located. The locking piece 606 can undergo radial deformation when compressed. A locking hole 402 is provided on the side wall of the riser 4 at a position corresponding to the locking piece 606. A reinforcing piece 8 is provided on the inner wall of the riser 4, and a connecting hole 801 is provided on the reinforcing piece 8, which is aligned with the locking hole 402. The reinforcing piece 8 is fixedly connected to the inner wall of the riser 4, which can be fixed by welding. The locking component 7 includes a knob 701 and a screw 702. The connecting hole 801 is a threaded hole, and the end of the screw 702 can pass through the locking hole 402 and be threaded into the connecting hole 801. When the locking member 7 rotates towards the locking plate 606, the end of the screw 702 slowly enters the cavity of the riser 4 and then abuts against the locking plate 606. When the locking member 7 is difficult to rotate, the locking plate 606 presses firmly against the outer wall of the lifting tube 3 to restrict the sliding of the lifting tube 3, thus achieving a locking effect. When the locking member 7 rotates away from the locking plate 606, the end of the screw 702 gradually releases its contact with the locking plate 606. At the same time, the locking plate 606 also gradually releases its pressure on the lifting tube 3. After a certain degree of release, the lifting tube 3 can be raised and lowered.

[0034] The limiting head is equipped with a slow-descent structure, which includes an inclined track and slow-descent rollers 9. The limiting head includes a base 601 and a top cover 602. The upper end of the base 601 has an opening, and the lower end of the base 601 is connected to the connecting sleeve 603. The top cover 602 covers the opening of the base 601, and the top cover 602 is connected to the base 601 by a snap-fit ​​connection. Track plates 10 are provided on both sides of the through hole of the connecting sleeve 603 within the base 601. In this specific embodiment, the track plates 10 are detachably connected to the base 601, that is, the base 601 has an insertion groove 607, and the track plates 10 are inserted into the insertion groove 607. Each track plate 10 has two inclined holes 1001. Two track plates 10 are arranged parallel to each other, and two inclined holes 1001 on the same side form an inclined track. In this specific embodiment, there are two inclined tracks, and correspondingly, two slow-descent rollers 9 are provided. The lower ends of the two inclined tracks are relatively close together, and the upper ends are relatively far apart. The two ends of each slow-descent roller 9 are respectively tactilely connected to the two inclined holes 1001 of the same inclined track.

[0035] When the lifting tube 3 descends, friction causes it to move the slow-descent rollers 9 towards the lower end of the inclined track. The two slow-descent rollers 9 approach each other, clamping the lifting tube 3. The closer they are to the lower end of the inclined track, the greater the clamping force on the lifting tube 3, thus slowing its descent and preventing it from falling too quickly and injuring the user. When the lifting tube 3 rises, it again moves the slow-descent rollers towards the upper end of the inclined track. The two slow-descent rollers 9 gradually move away from each other, and the clamping force on them gradually decreases, making it easier to lift the lifting tube 3.

[0036] The upper end of the lifting tube 3 is provided with a connecting plate 11. Both sides of the connecting plate 11 are provided with beveled edges 1101, and the connecting plate 11 is narrower at the upper end and wider at the lower end. The back of the writing board 1 is provided with two slots 101 that match the beveled edges 1101 on both sides of the connecting plate 11. The beveled edges 1101 on both sides of the connecting plate 11 are inserted into the two slots 101 in a corresponding manner. A fixing frame 1102 is connected to the side of the connecting plate 11 away from the writing board 1. The connecting plate 11 and the fixing frame 1102 can be integrally formed or welded together. The fixing frame 1102 is provided with a first fixing hole 1103. The upper side wall of the lifting tube 3 is provided with a first through hole 302. The upper end of the lifting tube 3 extends into the fixing frame 1102. The first fixing hole 1103 is aligned with the first through hole 302, and then the tube is fixed by a first fastener 12. The fixing frame 1102 is provided with an angle adjustment hole 1104, which is arc-shaped. The upper side wall of the lifting tube 3 is provided with a second through hole 303. The adjustment hole is aligned with the second through hole 303. After adjusting the angle of the writing board 1, it is then fixed by the second fastener 13.

[0037] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the principles and spirit of this application are included within the protection scope of this application.

Claims

1. A lifting writing board, comprising a writing board (1) and a base (2), wherein the writing board (1) is connected to a lifting tube (3), and the base (2) is provided with a vertical tube (4), and the lifting tube (3) is movably fitted inside the vertical tube (4); characterized in that: A locking assembly is provided between the lifting pipe (3) and the riser pipe (4), the locking assembly comprising, The connector sleeve (6) is connected to the upper end of the riser (4) and fitted onto the outside of the lifting pipe (3); the connector sleeve (6) is provided with a locking piece (606) that can move radially. The locking member (7) has a locking hole (402) on the side wall of the riser (4). The end of the locking member (7) can pass through the locking hole (402) and abut against the locking piece (606). The locking piece (606) can abut against the outer wall of the riser (3) to restrict the sliding of the riser (3).

2. The height-adjustable writing board according to claim 1, characterized in that: The connector sleeve (6) includes a limiting head and a connecting sleeve (603). One end of the connecting sleeve (603) is connected to one end of the limiting head. The connecting sleeve (603) is inserted into the upper end of the riser (4), and the limiting head is limited on the upper end surface of the riser (4).

3. The height-adjustable writing board according to claim 1, characterized in that: The locking piece (606) has deformation grooves (605) on both sides.

4. The height-adjustable writing board according to claim 2, characterized in that: The outer surface of the side wall of the pipe sleeve (603) is provided with multiple positioning ribs (604), and the positioning ribs (604) abut against the inner wall of the riser (4).

5. The height-adjustable writing board according to claim 2, characterized in that: The inner diameter of the connecting sleeve (603) matches the outer diameter of the lifting pipe (3).

6. The height-adjustable writing board according to claim 1, characterized in that: The inner wall of the riser (4) is provided with a reinforcing plate (8), and the reinforcing plate (8) is provided with a connecting hole (801). The connecting hole (801) is aligned with the locking hole (402). The end of the locking member (7) can pass through the locking hole (402) and the connecting hole (801) and abut against the locking plate (606).

7. The height-adjustable writing board according to claim 6, characterized in that: The locking component (7) includes a knob (701) and a screw (702). The connecting hole (801) is a threaded hole. The end of the screw (702) can pass through the locking hole (402) and be threaded into the connecting hole (801).

8. The height-adjustable writing board according to claim 1, characterized in that: The lower end of the lifting pipe (3) is provided with a limiting piece (301), and the inner wall of the riser (4) is provided with a limiting protrusion (401). The limiting piece (301) is located on the lower side of the limiting protrusion (401).

9. The height-adjustable writing board according to claim 2, characterized in that: The limiting head is provided with a slow-descent structure, which includes an inclined slide rail and a slow-descent roller (9). The slow-descent roller (9) is slidably engaged on the inclined slide rail. When the lifting tube (3) descends, the slow-descent roller (9) moves towards the lower end of the inclined slide rail and gradually presses against the outer wall of the lifting tube (3) to roll. When the lifting tube (3) rises, the slow-descent roller (9) moves towards the upper end of the inclined slide rail and gradually releases the outer wall of the lifting tube (3) to roll.

10. The height-adjustable writing board according to claim 1, characterized in that: The upper end of the lifting tube (3) is provided with a connecting plate (11), and both sides of the connecting plate (11) are provided with bevels (1101), and the upper end of the connecting plate (11) is narrow and the lower end is wide; the back of the writing board (1) is provided with two slots (101) that match the bevels (1101) on both sides of the connecting plate (11), and the bevels (1101) on both sides of the connecting plate (11) are inserted into the two slots (101) one by one.

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