A hand-cranked table

Abstract

The utility model discloses a hand -operated table relates to furniture technical field, including desktop, the downside of desktop is provided with telescopic stand and the power component of driving telescopic stand telescopic, the power component includes the handle of being as the power source input, the handle includes horizontal bar, one end of horizontal bar is rotatably installed with the swivel bar and is opened to set up the limit hole, the limit hole is located the side of horizontal bar, the swivel bar is slidably sleeved with the rocker, and the end of rocker is fixed with the limit block of adapting with limit hole, when limit block inserts into limit hole, horizontal bar and rocker are 90 degree angle, when swivel bar, rocker synchronous overturn and horizontal bar are 180 degree angle, to realize avoiding the leg space of user's interference, the utility model discloses handle adopts the foldable structure, through the cooperation of swivel bar, rocker and tension spring, can be stored to the shell side wall when not using, avoids the leg space of user's interference, and promotes the comfort of use.

Description

Technical Field

[0001] This utility model relates to the field of furniture technology, specifically to a hand-cranked table. Background Technology

[0002] In existing technologies, hand-cranked tables, as height-adjustable furniture products, are widely used in offices, studies, and medical settings. Their height adjustment typically relies on a manually operated mechanical structure to raise or lower the desktop. Traditional height-adjustable tables often use screws, chains, or simple lever mechanisms as power transmission components, such as using a knob to drive a screw to extend or retract, thus changing the height of the support legs. However, these existing structures have shortcomings: the handles of traditional hand-cranked tables are designed in a fixed style, which can interfere with the user's legroom during use, affecting comfort and practicality; at the same time, in scenarios with large desktops, a single support component cannot ensure overall stability, and adjustments may cause the desktop to tilt or wobble. These problems not only reduce the applicability and safety of hand-cranked tables but also limit their widespread application in space-constrained or high-frequency use environments. Utility Model Content

[0003] The purpose of this utility model is to provide a hand-cranked table that solves the problem that the handle of a traditional hand-cranked table is designed in a fixed style, which interferes with the user's leg space and affects comfort and practicality during use.

[0004] The present invention solves the above-mentioned technical problems through the following technical solution: The present invention includes a desktop, and a telescopic column and a power component for driving the telescopic column to extend and retract are provided on the lower side of the desktop. The power assembly includes a handle as a power source input. The handle includes a horizontal rod. One end of the horizontal rod is rotatably mounted with a rotating rod and has a limiting hole. The limiting hole is located on the side of the horizontal rod. A rocker arm is slidably sleeved on the rotating rod. The end of the rocker arm is fixed with a limiting block that matches the limiting hole. When the limiting block is inserted into the limiting hole, the horizontal rod and the rocker arm form a 90° angle; when the rotating rod and the rocker arm rotate synchronously to form a 180° angle with the horizontal rod, it is to avoid interfering with the user's legroom.

[0005] Preferably, the telescopic column includes an inner rod and an outer cylinder that is slidably sleeved on the outside of the inner rod, and the upper end of the inner rod is fixed to the bottom of the tabletop.

[0006] Preferably, the number of telescopic columns is one.

[0007] Preferably, the number of telescopic columns is at least two, and the multiple telescopic columns are located on the same straight line.

[0008] Preferably, a bottom plate is fixed to the bottom of the outer cylinder, and a top plate is fixed to the top of the inner rod, with the top plate being fixedly connected to the tabletop.

[0009] Preferably, a tension spring is installed between the rocker arm and the rotating rod to drive the rocker arm to move towards the end of the horizontal rod.

[0010] Preferably, the rocker arm has an elongated hole on its outer circumference, and the power assembly also includes a housing fixed to the outside of the telescopic column, with a stop rod fixed to the outer side of the housing of the power assembly.

[0011] Preferably, the power assembly further includes a housing fixed to the outside of the telescopic column, a drive shaft rotatably mounted inside the housing, and the drive shaft and the inner rod being connected by a gear and rack structure; a worm gear is fixed on the drive shaft, and a worm gear meshing with the worm gear is rotatably mounted inside the housing, with the handle mounted on the end of the worm gear.

[0012] Preferably, the gear rack structure includes a rack machined on the outer surface of the inner rod and a gear fixed on the transmission shaft, and the rack and the gear are meshed together.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. By adopting a worm gear structure to achieve unidirectional drive, the desktop can be automatically locked after being raised and lowered to the set height to avoid accidental slippage due to gravity or external force, thus ensuring safety and stability.

[0014] 2. The telescopic column, combined with the gear and rack structure, enables precise adjustment of the desktop height, adapting to the needs of different usage scenarios and improving the applicability of the furniture.

[0015] 3. The handle adopts a foldable structure. Through the cooperation of the rotating rod, rocker arm and tension spring, it can be stored in the side wall of the shell when not in use, so as not to interfere with the user's leg space and improve the comfort of use.

[0016] 4. Supports single or multiple telescopic columns, suitable for desktops of different sizes. Multiple support components are arranged in a straight line and driven synchronously to ensure smooth and tilt-free desktop lifting. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of an embodiment of the double telescopic column of this utility model; Figure 2 This is a schematic diagram of the structure of an embodiment of the single telescopic column of this utility model; Figure 3 This is a schematic diagram of the internal structure of the power assembly; Figure 4 This is a schematic diagram of the exploded structure of the handle; Figure 5This is a schematic diagram of the structure after the handle is folded. The numbers in the image represent: 1-Tabletop; 21-Outer cylinder; 22-Inner rod; 23-Sliding sleeve; 24-Base plate; 25-Top plate; 31-Rack; 32-Gear; 33-Drive shaft; 34-Worm gear; 35-Worm; 36-Handle; 361-Horizontal rod; 362-Circular part; 363-Rotating rod; 364-Rock arm; 365-Tension spring; 366-Limiting block; 367-Limiting hole; 368-Elongated hole; 369-Support rod; 37-Housing shell. Detailed Implementation

[0018] The above-mentioned and other technical features and advantages of this utility model will be described in more detail below with reference to the accompanying drawings.

[0019] This embodiment provides a technical solution: a hand-cranked table, such as... Figure 1-5 As shown, the device includes a desktop 1, with a telescopic column and a power component for driving the telescopic column to extend and retract on the lower side of the desktop 1, thereby adjusting the height of the desktop 1. When storage or transportation is required, the height of the telescopic column can be shortened to the maximum extent. At the same time, the height of the desktop 1 can be adjusted as needed during use, improving adaptability.

[0020] The telescopic column includes an inner rod 22 and an outer cylinder 21 that is slidably sleeved on the outside of the inner rod 22. The inner rod 22 extends from the upper end of the outer cylinder 21, and the upper end of the inner rod 22 is fixed to the bottom of the tabletop 1. To ensure the connection strength between the inner rod 22 and the tabletop 1, a top plate 25 is welded and fixed to the top of the inner rod 22. The top plate 25 is fixedly connected to the tabletop 1. Specifically, the two can be connected by screws for easy disassembly and assembly. A sliding sleeve 23 is provided in the upper inner cavity of the outer cylinder 21 to reduce the friction when the inner rod 22 slides. The sliding sleeve 23 is made of nylon material with a thickness of 4mm. A base plate 24 is fixed to the bottom of the outer cylinder 21. The base plate 24 increases the support area between the outer cylinder 21 and the ground to ensure the stability of the table.

[0021] All components of the desktop 1 and the telescopic column are made of 316 stainless steel; the thickness of the desktop 1, the base plate 24 and the top plate 25 is 5mm.

[0022] The power assembly includes a housing 37 fixed to the outside of the outer cylinder 21. A drive shaft 33 is rotatably mounted inside the housing 37. The drive shaft 33 is connected to the inner rod 22 via a gear and rack structure. The gear and rack structure includes a rack 31 machined on the outer surface of the inner rod 22 and a gear 32 fixed on the drive shaft 33. A through hole is provided at a corresponding position on the outer cylinder 21. The gear 32 passes through the through hole and meshes with the rack 31. In other embodiments, the rack 31 can also be fixedly mounted on the outer surface of the inner rod 22. A worm gear 34 is fixed on the drive shaft 33. A worm 35 meshes with the worm gear 34 and is rotatably mounted inside the housing 37. A handle 36 is installed at the end of the worm 35. The worm gear 34 and the worm 35 are made of copper, while the rack 31 and the gear 32 are made of stainless steel.

[0023] By cranking the handle 36 to drive the worm 35 to rotate, the worm 35 will cooperate with the worm wheel 34 to drive the transmission shaft 33 to rotate. Then, through the cooperation of the gear 32 and the rack 31, the inner rod 22 will be extended and retracted, thereby achieving the effect of adjusting the height of the tabletop 1. Since the worm gear structure has the characteristic of unidirectional drive, that is, the power can only be transmitted from the worm 35 to the worm wheel 34, and the reverse transmission (from the worm wheel 34 to the worm 35) cannot be realized. That is, when the tabletop 1 is raised or lowered by the handle 36, it will automatically lock, and the tabletop 1 will not fall down on its own. It can also bear weight, which is convenient for use and operation.

[0024] The number of telescopic columns is one, and this implementation method is suitable for situations where the desktop 1 is small.

[0025] The number of telescopic columns is at least two. This implementation is suitable for cases where the desktop 1 is large and multiple telescopic columns are located on the same straight line. The power assembly is set along the straight line. There are multiple racks 31 and gears 32 in the power assembly to ensure that multiple telescopic columns can be driven to rise and fall at the same time.

[0026] Furthermore, to prevent the handle 36 from obstructing the user's legs during use, the handle 36 includes a transverse rod 361 fixed to the end of the worm gear 35. A rotating rod 363 is rotatably mounted on the end of the transverse rod 361 away from the worm gear 35 via a pivot, and the rotation direction of the rotating rod 363 is along the length direction of the transverse rod 361. A rocker arm 364 is slidably sleeved on the rotating rod 363. A tension spring 365 is installed between the rocker arm 364 and the rotating rod 363 to drive the rocker arm 364 to move towards the end of the transverse rod 361. The end of the transverse rod 361 that connects to the rotating rod 363 has a rounded portion 362 to ensure the smoothness of the rotation of the rocker arm 364.

[0027] A limiting hole 367 is provided at the end of the transverse rod 361 away from the worm gear 35. A limiting block 366 that matches the limiting hole 367 is fixed at the end of the rocker arm 364. An elongated hole 368 is provided on the outer circumferential surface of the rocker arm 364. A stop rod 369 is fixed on the outer side of the housing 37. The distance between the rotating shaft and the elongated hole 368 is greater than the distance between the rotating shaft and the stop rod 369.

[0028] When the limiting block 366 aligns with the limiting hole 367, the limiting block 366 will be inserted into the limiting hole 367 due to the force of the tension spring 365. The horizontal rod 361 forms a 90° angle with the rocker arm 364. At this time, the user can adjust the height of the tabletop 1 by shaking the rocker arm 364, thereby driving the worm gear 35 to rotate. After adjusting the height of the tabletop 1, pull the rocker arm 364 to disengage the limiting block 366 from the limiting hole 367, and then rotate the rocker arm 364. Pulling the rocker arm 364 outward will cause the stop rod 369 to insert into the elongated hole 368. At this time, the rocker arm 364 and the horizontal rod 361 are on the same line. In a straight line (i.e., at a 180° angle between the rocker arm 364 and the horizontal bar 361), when the rocker arm 364 is released, it will be pressed against the stop bar 369 due to the force of the tension spring 365. Based on this force, the rocker arm 364 can be restricted to the side wall of the housing 37 to avoid interference with the user's legs. When it is necessary to adjust the height of the tabletop 1, the rocker arm 364 can be rotated outward. Under the force of the tension spring 365, the limiting block 366 contacts the surface of the circular part 362 until the limiting block 366 contacts the limiting hole 367. Under the force of the tension spring 365, the limiting block 366 is inserted into the limiting hole 367.

[0029] The above are merely preferred embodiments of this utility model and are illustrative rather than restrictive. Those skilled in the art will understand that many changes, modifications, and even equivalents can be made within the spirit and scope defined by the claims of this utility model, all of which will fall within the protection scope of this utility model.

Claims

1. A hand-cranked table, characterized in that, Includes a desktop (1), and a telescopic column and a power component for driving the telescopic column to extend and retract are provided on the lower side of the desktop (1); The power assembly includes a handle (36) as a power source input. The handle (36) includes a horizontal rod (361). One end of the horizontal rod (361) is rotatably mounted with a rotating rod (363) via a rotating shaft and has a limiting hole (367). The limiting hole (367) is located on the side of the horizontal rod (361). A rocker arm (364) is slidably sleeved on the rotating rod (363). The end of the rocker arm (364) is fixed with a limiting block (366) that matches the limiting hole (367). When the limiting block (366) is inserted into the limiting hole (367), the horizontal bar (361) and the rocker arm (364) form a 90° angle; when the rotating bar (363) and the rocker arm (364) rotate synchronously to form a 180° angle with the horizontal bar (361), it is to avoid interfering with the user's leg space.

2. The hand-cranked table as described in claim 1, characterized in that, The telescopic column includes an inner rod (22) and an outer cylinder (21) that is slidably sleeved on the outside of the inner rod (22). The upper end of the inner rod (22) is fixed to the bottom of the tabletop (1).

3. The hand-cranked table as described in claim 2, characterized in that, The number of telescopic columns is one.

4. The hand-cranked table as described in claim 2, characterized in that, The number of telescopic columns is at least two, and multiple telescopic columns are located on the same straight line.

5. The hand-cranked table as described in any one of claims 2-4, characterized in that, The bottom of the outer cylinder (21) is fixed with a bottom plate (24), and the top of the inner rod (22) is fixed with a top plate (25). The top plate (25) is fixedly connected to the tabletop (1).

6. The hand-cranked table as described in claim 1, characterized in that, A tension spring (365) is installed between the rocker arm (364) and the rotating rod (363) to drive the rocker arm (364) to move towards the end of the transverse rod (361).

7. The hand-cranked table as described in claim 6, characterized in that, The rocker arm (364) has an elongated hole (368) on its outer circumference. The power assembly also includes a housing (37) fixed to the telescopic column. A stop rod (369) is fixed on the outer side of the housing (37).

8. The hand-cranked table as described in claim 1, characterized in that, The power assembly also includes a housing (37) fixed to the outside of the telescopic column. A drive shaft (33) is rotatably installed inside the housing (37). The drive shaft (33) is connected to the inner rod (22) through a gear and rack structure. A worm gear (34) is fixed on the drive shaft (33). A worm (35) that meshes with the worm gear (34) is rotatably installed inside the housing (37). The handle (36) is installed at the end of the worm (35).

9. The hand-cranked table as described in claim 8, characterized in that, The gear rack structure includes a rack (31) machined on the outer surface of the inner rod (22) and a gear (32) fixed on the transmission shaft (33), and the rack (31) and the gear (32) are meshed together.

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