Desk

Abstract

The utility model provides a desk and belongs to the technical field of desks. The problems that an existing desk is high in production cost and unstable in positioning after lifting adjustment are solved. The desk comprises a desk plate, desk bottom feet and upper desk legs fixedly connected with one end of the desk plate, the desk bottom feet are connected with lower desk legs, the upper desk legs and the lower desk legs are vertically connected in a sliding mode, the upper desk legs and the lower desk legs are flat, the lower desk legs are provided with receding openings, and flat handles are hinged to the lower desk legs. An abutting part which is eccentrically arranged relative to the hinged position is arranged at the inner end of the handle, and the abutting part is transversely arranged, can penetrate through the receding opening and extends into the inner cavity of the lower table leg; and the handle is pulled to drive the abutting part to abut against the upper table leg so as to press the upper table leg on the inner side wall of the lower table leg or to drive the abutting part to release the abutting against the upper table leg so as to enable the upper table leg to slide up and down relative to the lower table leg. According to the desk, the positioning stability of the upper desk legs and the lower desk legs can be greatly improved under the condition that the upper desk legs and the lower desk legs are slightly improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of desks and relates to a desk. Background Art

[0002] Desks and chairs are usually used in combination and are a common teaching setting. In order to meet the needs of existing students for lying down for lunch breaks, the backs of the chairs are usually set to be tilted backwards, and the legs of the desks are designed to be liftable to make room for or provide a place for the legs of students lying down. However, due to the limited space in the entire classroom, the distance between adjacent desks in front and behind is limited. When the backs of the chairs are laid back, they take up a large space, making it impossible to place more sets of desks and chairs in the classroom.

[0003] Therefore, in order to save the use space of desks and chairs, the applicant previously applied for a Chinese patent application [application publication number: CN117179450A] to disclose a desk, including a table top, a cantilever beam, a left table leg and a right table leg, two cantilever beams are arranged front and back, and the two cantilever beams are arranged horizontally. The table top is laid on the two cantilever beams, and a vertically arranged table leg is connected between the left ends of the two cantilever beams and the left table leg. The right ends of the two cantilever beams are suspended, and the right table leg is arranged below the right ends of the two cantilever beams. The left table leg and the right table leg are both long strips and arranged along the front and back direction. The desk also includes a support rod, which is parallel to the above-mentioned cantilever beams. The table leg comprises two vertically arranged telescopic rods, and the two telescopic rods are distributed front and back, the lower ends of the two telescopic rods are fixed on the left table leg, and the upper ends are respectively connected to the left ends of the two cantilever beams. The table leg comprises two vertically arranged telescopic rods, and the telescopic rods include a tube body and a rod body. The lower end of the tube body is fixed on the left table leg, and the upper end of the rod body is connected to the cantilever beam. The lower end of the rod body is slidably inserted into the upper end of the tube body, and a plurality of positioning holes are vertically opened on the side wall of the tube body. An elastic pin that can be extended and retracted is provided on the rod body, and the elastic pin can be inserted and positioned in the positioning hole.

[0004] Since the above structure has a table leg on one side of the table top, in order to ensure the stability of lifting and lowering, a structure of two vertically arranged telescopic rods is adopted. The height of the table top is adjusted by synchronously extending and retracting the two telescopic rods. However, the design of two telescopic rods will lead to a higher overall production cost of the desk. During adjustment, the two telescopic rods need to be adjusted and positioned synchronously, which makes adjustment inconvenient. If a single telescopic rod design is adopted, positioning is achieved through the cooperation of an elastic pin and a positioning hole. Since the elastic pin needs to be quickly extended and retracted in the positioning hole, only vertical positioning is achieved after the elastic pin and the positioning hole are positioned. However, in the front and rear directions of the desk, the elastic pin is only supported by elasticity, which causes the table top to shake in the front and rear directions. Although the production cost of the desk is saved, the stability of the desk will be affected. Utility Model Content

[0005] The purpose of the utility model is to propose a desk in view of the above problems existing in the prior art. The technical problem to be solved by the utility model is: how to solve the problems of high production cost and unstable positioning of the existing desks after lifting and lowering adjustment.

[0006] The purpose of the utility model can be achieved through the following technical solutions:

[0007] A desk, comprising a table top, a table foot and an upper table leg fixedly connected to one end of the table top, the table foot being connected to a lower table leg, the upper table leg being vertically slidably connected to the lower table leg, the upper table leg and the lower table leg being both flat, and characterized in that a yield opening is provided on the lower table leg, a flat handle is hinged on the lower table leg, the inner end of the handle has a supporting portion eccentrically arranged relative to the hinge, the supporting portion is arranged horizontally, the supporting portion can pass through the yield opening and extend into the inner cavity of the lower table leg, and the handle is pulled to drive the supporting portion to press the upper table leg to press it tightly against the inner side wall of the lower table leg, or to drive the supporting portion to release the pressure on the upper table leg so that it can slide up and down relative to the lower table leg.

[0008] Working principle: When the desk is in normal use during class, the upper table leg and the lower table leg slide and position, and the pull handle is in the vertical direction. In actual operation, the handle can be pulled upward or downward, and the abutting portion passes through the yielding opening and is partially located in the inner cavity of the lower table leg, and the abutting portion is arranged directly opposite to the upper table leg, and pushes the upper table leg to press against the inner side wall of the lower table leg, and by eccentrically arranging the abutting portion relative to the junction and arranging it horizontally, the abutting portion presses the upper table leg against the inner side wall of the lower table leg in the front-to-back direction, thereby realizing the positioning of the upper table leg and the lower table leg, and avoiding the table board from shaking in the front-to-back direction. When the height of the desk needs to be adjusted, the handle is pulled, and the rotation of the handle drives the abutting portion to release the lock on the upper table leg, so that the upper table leg can slide vertically along the lower table leg. In order to reduce the upper table leg Due to the influence of the table legs, the handle can be rotated to move the supporting part out of the clearance opening. Through the setting of the clearance opening and the handle, on the one hand, the vertical positioning of the upper and lower legs can be achieved, which avoids the table board from shaking back and forth after positioning, improves the stability of positioning, and by pulling the handle, the operation is more labor-saving and convenient. On the other hand, the supporting part of the handle is positioned by pressing, thus realizing stepless adjustment between the upper and lower legs, improving the convenience of height adjustment of the table board, and can greatly improve the positioning stability of the upper and lower legs with relatively small improvements on the upper and lower legs, and realizes the stability when only one set of upper and lower legs is set on one side of the table board, thereby achieving the purpose of reducing production costs and also improving the stability of desk use.

[0009] The handle is designed to be flat as a whole, so that the width of the handle is wider, and the width of the abutment part at the inner end of the handle is also larger. By eccentrically arranging the abutment part relative to the hinge and arranging it horizontally, the abutment part is equivalent to an eccentric wheel structure. When the handle drives the abutment part to rotate, the abutment part presses the upper table leg against the lower table leg in the front-to-back direction. At this time, the horizontal arrangement of the abutment part can synchronously push the upper table leg and the contact side of the abutment part, thereby ensuring the stability of the positioning and avoiding looseness.

[0010] The above-mentioned desk can adopt the vertical sliding connection of the upper and lower legs on one side, or on both sides, which can improve the stability of positioning and the convenience of height adjustment, realize the height adjustment of the table top, and in order to save more effort, it is usually adopted to pull the handle downward.

[0011] The handle and the abutment portion can be integrally formed or can be designed as a split piece.

[0012] In the above-mentioned desk, a plurality of transversely arranged friction ribs are arranged on the outer side wall of the upper table leg facing the yield opening, and the abutting portion can abut against the friction ribs.

[0013] The setting of the friction ribs improves the stability of the vertical positioning of the upper and lower table legs through the abutment part, and can be further limited by the friction ribs. At this time, the abutment part can abut against the outer wall of the friction ribs or against the lower end wall of the friction ribs, thereby achieving the stability of the upper and lower table legs being positioned only by the handle, which greatly improves the convenience and stability of the positioning of the upper and lower table legs.

[0014] In the above-mentioned desk, a positioning sleeve is provided on the upper end of the lower table leg, a notch connected to the clearance opening is formed on the positioning sleeve, a guide surface is provided on the outer wall of the positioning sleeve and is inclined vertically, one end of the guide surface is connected to the clearance opening, the guide surface is inclined outward from the end connected to the clearance opening to the other end, and the handle is hinged on the positioning sleeve.

[0015] The setting of the guide surface enables the abutting part to quickly rotate into or out of the clearance opening after the handle is pulled. For the convenience of operation, two guide surfaces can be provided, which are respectively located at the upper and lower ends of the clearance opening, further improving the convenience of the handle operation. In addition, since the upper table leg needs to slide vertically along the lower table leg, the inner wall of the lower table leg and the outer wall of the upper table leg are mutually fitted and close. In order to reduce costs, the thickness of the lower table leg is usually set to be smaller, so directly installing the handle on the lower table leg will increase the processing difficulty. The setting of the positioning sleeve enables the handle and the guide surface to be directly set on the positioning sleeve, reducing the processing of the lower table leg, reducing the processing difficulty, making the installation of the handle more convenient, and further achieving the purpose of saving costs. In addition, the length of the abutting part can be set longer during processing, so that the lateral contact area between the abutting part and the upper table leg is larger, thereby further improving the stability of the positioning of the abutting part.

[0016] In the above-mentioned desk, the abutting portion is provided with a plurality of spacing grooves in the vertical direction, and the plurality of spacing grooves are distributed in the horizontal direction, or the abutting portion is provided with a plurality of spacing grooves in the horizontal direction, and the plurality of spacing grooves are distributed in the vertical direction.

[0017] By providing the spacing grooves on the abutting part, the abutting part can realize multiple abutting positioning points against the upper table legs, and the abutting part is more convenient to cool during processing and forming, and the precision requirement of the abutting part is low, which facilitates the manufacturing of the abutting part and reduces the production cost. Whether the spacing grooves are provided horizontally or vertically can reduce the manufacturing precision and also provide a better abutting effect.

[0018] In the above-mentioned desk, the table top is only provided with the above-mentioned upper table leg on one side, and at least one transversely arranged cantilever beam is connected to the outer side wall of the upper end of the upper table leg. The table top is laid above the cantilever beam, and the table top is connected to one end of the cantilever beam.

[0019] The setting of the cantilever beam improves the stability of the connection between the table top and the upper leg when an upper table leg is provided, and the table top is laid on top of the cantilever beam, so that the setting of the cantilever beam does not affect the normal use of the table top. Multiple cantilever beams can be set according to specific stability requirements to improve the stability of the desk.

[0020] In the above-mentioned desk, a plurality of positioning holes are vertically provided on the side wall of the lower table leg, and a retractable elastic pin is provided at the lower end of the upper table leg, and the elastic pin can be inserted into the positioning hole.

[0021] The upper table leg and the lower table leg are plugged and positioned by elastic pins and positioning holes, thereby improving the stability of the vertical positioning of the upper table leg and the lower table leg. Further in conjunction with the positioning of the handle, the handle realizes the front and rear positioning of the upper table leg and the lower table leg, and realizes the positioning of the upper table leg and the lower table leg in two different directions after adjustment, thereby improving the positioning effect of the upper table leg and the lower table leg.

[0022] Preferably, the positioning hole is provided on the side wall on one side of the lower table leg, and the clearance opening is provided on the side wall on the other side of the lower table leg, so that the positioning of the handle and the elastic pin do not affect each other, thereby improving the stability of the positioning.

[0023] In the above-mentioned desk, the lower end of the upper table leg has a shielding portion located below the elastic pin and close to the inner wall of the lower table leg, and the shielding portion is arranged opposite to the positioning hole located below the elastic pin.

[0024] By providing a shielding portion at the lower end of the upper table leg, the shielding portion can shield the positioning hole below the elastic pin when the elastic pin is inserted into one of the positioning holes, thereby preventing students from inserting their fingers into the positioning hole below the elastic pin during operation, thereby improving the safety and stability of the operation.

[0025] In the above-mentioned desk, a shielding shell is fixedly connected to the outer wall of the lower table leg, all the positioning holes below the uppermost positioning hole are located in the shielding shell, and the elastic pin can be inserted in the positioning hole and partially located in the shielding shell.

[0026] The setting of the shielding shell allows the lower end of the upper table leg to be used to set the elastic pin, so that the lifting and lowering between the upper table leg and the lower table leg are not affected. Moreover, since it is set outside the lower table leg, it can also be installed quickly, preventing students from embedding their fingers into the positioning hole below the elastic pin during operation, thereby improving the safety and stability of the operation.

[0027] Specifically, for the convenience of installation, all positioning holes may be arranged in the shielding shell.

[0028] In the above-mentioned desk, one cantilever beam is provided, and a reinforcing block is fixedly provided at the connection between the cantilever beam and the upper table leg.

[0029] When the table top and the upper table leg are connected by only one cantilever beam, the cantilever beam needs to withstand greater pressure. Therefore, a reinforcing block is added at the connection between the cantilever beam and the upper table leg to improve the stability of the desk.

[0030] Preferably, a reinforcement block may be disposed between the lower end of the cantilever beam and the outer side wall of the upper table leg, and the reinforcement block may be triangular in shape to further enhance the stability of the desk.

[0031] In the above-mentioned desk, the base of the desk includes a support rod and a left table leg and a right table leg arranged parallel to each other, the right table leg is connected to the lower table leg, one end of the support rod is fixed to the lower table leg and is higher than the right table leg, the other end of the support rod is connected to the left table leg, and the support rod is arranged parallel to the cantilever beam.

[0032] The lower table leg is connected to the left table foot by a support rod, and the support rod is parallel to the cantilever beam, so that a fulcrum is generated below the right end of the cantilever beam that is suspended in the air to prevent the desk from tipping over. The left and right table feet have four fulcrums, making the desk more stable. Since the right end of the cantilever beam is suspended in the air, the table leg tends to tilt to the right after being stressed. For this reason, the left end of the support rod is higher than the left table foot, so that the connection point between the table leg and the left table foot, the connection point between the support rod and the right table foot, and the connection point between the support rod and the table leg form a three-point support, that is, the support rod can shape the table leg to prevent it from tilting and deforming to the right, thereby improving the stability of the desk.

[0033] In actual use, since the parallel left and right table legs are symmetrical, the suspended end of the desk can face either left or right according to the distribution of aisles in the classroom, thereby improving the adaptability of the desk.

[0034] Compared with the prior art, this desk has the following advantages:

[0035] 1. Through the setting of the handle and the clearance opening, on the one hand, the upper table leg and the lower table leg can be vertically positioned, avoiding the table board from shaking back and forth after positioning, improving the stability of positioning, and by pulling the handle, the operation is more labor-saving and convenient. On the other hand, the abutting part of the handle achieves positioning by pressing, thereby realizing stepless adjustment between the upper table leg and the lower table leg, and improving the convenience of adjusting the height of the table board.

[0036] 2. The setting of the friction ribs can further limit the position of the friction ribs. At this time, the abutting portion can abut against the outer wall of the friction ribs or the lower end wall of the friction ribs, thereby achieving the stability of the upper and lower table legs only by using the handle for positioning, which greatly improves the convenience and stability of the positioning of the upper and lower table legs.

[0037] 3. By providing a shielding portion at the lower end of the upper table leg or adding a shielding sleeve on the outer side wall of the lower table leg, the shielding portion can shield the positioning hole below the elastic pin when the elastic pin is inserted into one of the positioning holes, or the shielding sleeve can shield all the positioning holes, thereby preventing students from inserting their fingers into the positioning holes below the elastic pin during operation, thereby improving the safety and stability of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a structural diagram of the first embodiment.

[0039] Figure 2 It is a rear view of the first embodiment.

[0040] Figure 3 yes Figure 2 Sectional view of AA.

[0041] Figure 4 yes Figure 3 A partial enlarged view of point A in the middle.

[0042] Figure 5 It is an exploded view of the lower table leg, handle and positioning sleeve in the utility model.

[0043] Figure 6 It is a side view of the handle in the utility model.

[0044] Figure 7 It is a partial structural diagram of the first embodiment.

[0045] Figure 8 It is a structural schematic diagram of the upper table leg in the first embodiment.

[0046] Fig. 9 It is a partial structural diagram of the second embodiment.

[0047] Fig.10 It is a structural diagram of the third embodiment.

[0048] Fig.11 It is a schematic diagram of the structure of the handle in the fourth embodiment.

[0049] In the figure, 1, table top; 2, table bottom foot; 21, support rod; 22, left table leg; 23, right table leg; 3, upper table leg; 31, friction rib; 32, elastic pin; 33, shielding part; 4, lower table leg; 41, clearance opening; 42, positioning hole; 43, shielding shell; 5, handle; 51, abutment part; 51a, spacing groove; 52, operating part; 6, positioning sleeve; 61, notch; 62, guide surface; 63, hinge shaft; 7, cantilever beam; 8, reinforcement block; 9, table drawer. DETAILED DESCRIPTION

[0050] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0051] Embodiment 1

[0052] like Figure 1 As shown, the desk comprises a table top 1, a table bottom foot 2 and an upper table leg 3 fixedly connected to one end of the table top 1, the table bottom foot 2 is connected to a lower table leg 4, the upper table leg 3 is vertically slidably connected to the lower table leg 4, and both the upper table leg 3 and the lower table leg 4 are flat.

[0053] Specifically, Figure 1-8 As shown, a clearance opening 41 is provided on the lower table leg 4, and a flat handle 5 is hinged on the lower table leg 4. The inner end of the handle 5 has a supporting portion 51 which is eccentrically arranged relative to the hinge. The supporting portion 51 is arranged horizontally, and the supporting portion 51 can pass through the clearance opening 41 and extend into the inner cavity of the lower table leg 4. By pulling the handle 5, the supporting portion 51 can be driven to press the upper table leg 3 to press it tightly against the inner side wall of the lower table leg 4, or the supporting portion 51 can be driven to release the pressure on the upper table leg 3 so that it can slide up and down relative to the lower table leg 4.

[0054] When the handle 5 is in the vertical direction, the handle 5 can be pulled upward or downward, and the abutting portion 51 passes through the clearance opening 41 and is partially located in the inner cavity of the lower leg 4, and the abutting portion 51 is arranged opposite to the upper leg 3, and pushes the upper leg 3 to press against the inner side wall of the lower leg 4, and by eccentrically arranging the abutting portion 51 relative to the hinge and arranging it horizontally, the abutting portion 51 presses the upper leg 3 against the inner side wall of the lower leg 4 in the front-to-back direction, thereby achieving the positioning of the upper leg 3 and the lower leg 4, and avoiding the table board 1 from shaking in the front-to-back direction. When the height of the desk needs to be adjusted, the handle 5 is pulled, and the handle 5 rotates to drive the abutting portion 51 to release the lock on the upper leg 3, so that the upper leg 3 can slide vertically along the lower leg 4. In order to reduce The influence on the upper table leg 3 can be achieved by rotating the handle 5 to move the supporting part 51 out of the clearance opening 41. Through the setting of the clearance opening 41 and the handle 5, on the one hand, the vertical positioning of the upper table leg 3 and the lower table leg 4 can be achieved, and the table board 1 can be prevented from shaking back and forth after positioning, thereby improving the stability of positioning, and by pulling the handle 5, the operation is more labor-saving and convenient. On the other hand, the supporting part 51 of the handle 5 is positioned by pressing, thereby realizing stepless adjustment between the upper table leg 3 and the lower table leg 4, and improving the convenience of height adjustment of the table board 1. With little improvement on the upper table leg 3 and the lower table leg 4, the positioning stability of the upper table leg 3 and the lower table leg 4 can be greatly improved, and the stability when only one group of upper table legs 3 and lower table legs 4 are set on one side of the table board 1 is achieved, thereby achieving the purpose of reducing production costs and also improving the stability of the desk.

[0055] The handle 5 is designed to be flat as a whole, so that the width of the handle 5 is relatively wide, and the width of the abutment portion 51 at the inner end of the handle 5 is also relatively large. By eccentrically arranging the abutment portion 51 relative to the hinge and arranging it horizontally, the abutment portion 51 is equivalent to an eccentric wheel structure. When the handle 5 drives the abutment portion 51 to rotate, the abutment portion 51 presses the upper table leg 3 against the lower table leg 4 in the front-to-back direction. At this time, the horizontal arrangement of the abutment portion 51 can synchronously push the upper table leg 3 and the contact side of the abutment portion 51, thereby ensuring the stability of the positioning and avoiding looseness.

[0056] The above-mentioned desk can adopt the vertical sliding connection of the upper table leg 3 and the lower table leg 4 on one side, or on both sides, which can improve the positioning stability and the convenience of height adjustment, realize the height adjustment of the table top 1, and in order to save more effort, the handle 5 is usually pulled downward.

[0057] The upper table leg 3 and the lower table leg 4 can be made of square tubes, which makes the positioning more stable.

[0058] like Figure 4-6 As shown, the outer end of the handle 5 has an operating portion 52 protruding outward. When the abutting portion 51 is in a position facing the upper table leg 3, the operating portion 52 is vertically arranged, and the operating portion 52 is close to the outer side wall of the lower table leg 4.

[0059] Through the setting of the operating part 52, when the handle 5 is rotated, the user only needs to pull the operating part 52, which is convenient for the user's operation. When the supporting part 51 presses the upper table leg 3 against the inner wall of the lower table leg 4, the operating part 52 is vertically arranged and close to the outer wall of the lower table leg 4, avoiding the user from accidentally touching and unlocking, thereby improving the stability and convenience of the handle 5 after operation.

[0060] In actual use, the operating portion 52 can be in the shape of a rod or a plate, etc., which are shapes that are easier to hold and convenient for users to apply force to.

[0061] like Figure 3-5 As shown, the upper end of the lower table leg 4 is sleeved with a positioning sleeve 6, and a notch 61 is provided on the positioning sleeve 6 to communicate with the clearance opening 41. The outer wall of the positioning sleeve 6 also has a guide surface 62 arranged vertically and tilted, and one end of the guide surface 62 is connected to the clearance opening 41, and the guide surface 62 is tilted outward from the end connected to the clearance opening 41 to the other end. Two guide surfaces 62 can be provided, respectively located at the upper and lower ends of the clearance opening 41, further improving the convenience of the handle 5 operation.

[0062] like Figure 1-7As shown, a plurality of transversely arranged friction ribs 31 are arranged on the outer wall of the upper table leg 3 facing the yield opening 41, and the abutting portion 51 can abut against the friction ribs 31. The above-mentioned upper table leg 3 is only arranged on one side of the table board 1, and at least two transversely arranged cantilever beams 7 are connected to the outer wall at the upper end of the upper table leg 3. The table board 1 is laid on the top of the cantilever beam 7, and the table board 1 is connected to one end of the cantilever beam 7. The table bottom foot 2 includes a support rod 21 and a left table foot 22 and a right table foot 23 arranged parallel to each other. The right table foot 23 is connected to the lower table leg 4, one end of the support rod 21 is fixed to the lower table leg 4 and is higher than the right table foot 23, and the other end of the support rod 21 is connected to the left table foot 22. The support rod 21 is arranged parallel to the cantilever beam 7, and a table drawer 9 opened toward the rear is provided below the table board 1, and the cantilever beam 7 is arranged below the table drawer 9.

[0063] like Figure 7 and Figure 8 As shown, a plurality of positioning holes 42 are vertically provided on the side wall of the lower table leg 4, a retractable elastic pin 32 is provided at the lower end of the upper table leg 3, and the elastic pin 32 can be inserted into the positioning hole 42, and the lower end of the upper table leg 3 has a shielding portion 33 located below the elastic pin 32 and close to the inner wall of the lower table leg 4, and the shielding portion 33 is arranged opposite to the positioning hole 42 located below the elastic pin 32.

[0064] Embodiment 2

[0065] The content of this embodiment is basically the same as that of the first embodiment, except that: Fig. 9 As shown, a shielding shell 43 is fixedly connected to the outer wall of the lower table leg 4, and all positioning holes 42 below the uppermost positioning hole 42 are located in the shielding shell 43. The elastic pin 32 can be inserted into the positioning hole 42 and partially located in the shielding shell 43. In order to facilitate the observation of the positioning of the elastic pin 32, the shielding shell 43 can be made of a transparent material.

[0066] Embodiment 3

[0067] The content of this embodiment is basically the same as that of the first embodiment, except that: Fig.10 As shown, a cantilever beam 7 is provided, and a reinforcing block 8 is fixedly provided at the connection between the cantilever beam 7 and the upper table leg 3 .

[0068] Preferably, the reinforcing block 8 can be arranged between the lower end of the cantilever beam 7 and the outer side wall of the upper table leg 3, and the reinforcing block 8 can be triangular in shape to further improve the stability of the desk.

[0069] Embodiment 4

[0070] The content of this embodiment is basically the same as that of the first embodiment, except that: Fig.11As shown, the abutting portion 51 is provided with a plurality of spacing grooves 51 a in the vertical direction, and the plurality of spacing grooves 51 a are distributed in the transverse direction; or the abutting portion 51 is provided with a plurality of spacing grooves 51 a in the transverse direction, and the plurality of spacing grooves 51 a are distributed in the vertical direction.

[0071] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A desk, comprising a desk top (1), a desk foot (2) and an upper desk leg (3) fixedly connected to one end of the desk top (1), the desk foot (2) being connected to a lower desk leg (4), the upper desk leg (3) being vertically slidably connected to the lower desk leg (4), the upper desk leg (3) and the lower desk leg (4) being both flat, characterized in that: The lower table leg (4) is provided with a clearance opening (41), and a flat handle (5) is hingedly connected to the lower table leg (4). The inner end of the handle (5) has a supporting portion (51) eccentrically arranged relative to the hinge, and the supporting portion (51) is arranged in the transverse direction. The supporting portion (51) can pass through the clearance opening (41) and extend into the inner cavity of the lower table leg (4), and by pulling the handle (5), the supporting portion (51) can be driven to press the upper table leg (3) to press it tightly against the inner side wall of the lower table leg (4), or to drive the supporting portion (51) to release the pressure on the upper table leg (3) so that it can slide up and down relative to the lower table leg (4).

2. The desk according to claim 1, characterized in that: A plurality of transversely arranged friction ribs (31) are arranged on the outer side wall of the upper table leg (3) facing the clearance opening (41), and the abutting portion (51) can abut against the friction ribs (31).

3. The desk according to claim 2, characterized in that: The upper end of the lower table leg (4) is sleeved with a positioning sleeve (6), the positioning sleeve (6) is provided with a notch (61) connected to the clearance opening (41), the outer wall of the positioning sleeve (6) is provided with a guide surface (62) arranged vertically inclined, one end of the guide surface (62) is connected to the clearance opening (41), and the guide surface (62) is arranged inclined outward from the end connected to the clearance opening (41) to the other end, and the handle (5) is hinged on the positioning sleeve (6).

4. The desk according to claim 2, characterized in that: The abutting portion (51) is provided with a plurality of spacing grooves (51a) in the vertical direction, and the plurality of spacing grooves (51a) are distributed in the horizontal direction, or the abutting portion (51) is provided with a plurality of spacing grooves (51a) in the horizontal direction, and the plurality of spacing grooves (51a) are distributed in the vertical direction.

5. The desk according to claim 1 or 2, characterized in that: The table top (1) is provided with the above-mentioned upper table leg (3) only on one side, and at least one transversely arranged cantilever beam (7) is connected to the outer side wall of the upper end of the upper table leg (3), and the table top (1) is laid on the top of the cantilever beam (7), and the table top (1) is connected to one end of the cantilever beam (7).

6. The desk according to claim 1 or 2, characterized in that: The side wall of the lower table leg (4) is provided with a plurality of positioning holes (42) in the vertical direction, and the lower end of the upper table leg (3) is provided with a retractable elastic pin (32), and the elastic pin (32) can be inserted into the positioning hole (42).

7. The desk according to claim 6, characterized in that: The lower end of the upper table leg (3) has a shielding portion (33) located below the elastic pin (32) and close to the inner wall of the lower table leg (4); the shielding portion (33) is arranged opposite to the positioning hole (42) located below the elastic pin (32).

8. The desk according to claim 6, characterized in that: A shielding shell (43) is fixedly connected to the outer side wall of the lower table leg (4), all positioning holes (42) below the uppermost positioning hole (42) are located in the shielding shell (43), and the elastic pin (32) can be inserted into the positioning hole (42) and partially located in the shielding shell (43).

9. The desk according to claim 5, characterized in that: The cantilever beam (7) is provided with one piece, and a reinforcing block (8) is fixedly provided at the connection between the cantilever beam (7) and the upper table leg (3).

10. The desk according to claim 6, characterized in that: The table foot (2) comprises a support rod (21) and a left table foot (22) and a right table foot (23) which are arranged in parallel with each other, the right table foot (23) is connected to the lower table leg (4), one end of the support rod (21) is fixed to the lower table leg (4) and is higher than the right table foot (23), the other end of the support rod (21) is connected to the left table foot (22), and the support rod (21) is arranged in parallel with the cantilever beam (7).

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