FOLDABLE DESK

Abstract

A foldable desk includes a tabletop, two outer legs, and two inner legs. An outer leg connecting rod and an inner leg connecting rod are connected to upper ends of the two outer legs and the two inner legs, respectively. Each of the two outer legs is rotatably connected to a one of the two inner legs in an X-structure. The tabletop is located between the two outer legs, and a front end of a bottom surface of the tabletop is disposed with a buckle configured to be buckled to the inner leg connecting rod when the foldable desk is unfolded for use. The two outer legs or the two inner legs are telescopic, and the tabletop is configured to be placed horizontally or switched to be placed in a state in which a front of the tabletop is lower than a rear of the tabletop.

Description

FIELD OF THE DISCLOSURE

The present disclosure relates to a foldable desk, and in particular to a foldable desk with an angle-adjustable a tabletop.

BACKGROUND OF THE DISCLOSURE

The panels of most desks are placed horizontally, and an angle of use of the panels cannot be adjusted. Even for a foldable desk, the panel can only be placed horizontally when in use. However, some consumers prefer to adjust the angle of use of the panel so that an angle between books and eyes of a reader can be reduced, allowing the reader to maintain a more comfortable posture without bending their neck excessively. Adjustable desk panels are available on the market, typically comprising a support structure and a locking mechanism between the desk panel and the support frame. The support structure must extend and slide to provide the necessary degrees of freedom for the desk panel to rotate. This means that not only must the connection between the desk panel and the support frame be able to slide, but the structure itself also needs a telescoping positioning function. The locking mechanism must also be usable when the desk panel is adjusted to different positions, and matching parts such as lock holes and lock cores need to be arranged on both the support structure and the desk panel, leading to a relatively complex structure.

BRIEF SUMMARY OF THE DISCLOSURE

The present disclosure provides a foldable desk with the advantage of a simple structure. The technical solutions adopted by the present disclosure to solve the technical problems are described.

A foldable desk comprises a tabletop, two outer legs symmetrically arranged on a left side and a right side of the tabletop, and two inner legs symmetrically arranged on the left and right sides of the tabletop. An outer leg connecting rod is connected to upper ends of the two outer legs, and an inner leg connecting rod is connected to upper ends of the two inner legs. Each of the two outer legs is rotatably connected to one of the two inner legs disposed on a same side as a corresponding one of the two outer legs in an X-structure, and the tabletop is located between the two outer legs. Rear ends of sides of the tabletop are rotatably connected to the two outer legs, and a front end of a bottom surface of the tabletop is disposed with a buckle configured to be buckled to the inner leg connecting rod when the foldable desk is unfolded for use. At least one of the two outer legs or the two inner legs is telescopic, and the tabletop is configured to be placed horizontally or switched to be placed in a state in which a front of the tabletop is lower than a rear of the tabletop.

The two outer legs are pivotally connected to the tabletop, and the two inner legs do not need to be pivotally connected to the tabletop. When the foldable desk is unfolded for use, the buckle inhibits movement of the inner leg connecting rod, and the inner leg connecting rod supports the front end of the bottom surface of the tabletop, allowing the tabletop to be used directly. By adjusting the two outer legs or the two inner legs to extend or retract, the tabletop can be placed horizontally or switched to a front-lower, rear-higher state. The structure is very simple, and the adjustment and folding operations are also very convenient.

In a preferred embodiment, the two inner legs are telescopic, and parts of the two inner legs above pivot points of the two inner legs and the two outer legs are telescopic. The tabletop is configured to be placed horizontally when the two inner legs are fully extended, and when the two inner legs are in a shortened state, the tabletop is placed in the state in which the front of the tabletop is lower than the rear of the tabletop. Shortening the two inner legs lowers a position of the inner leg connecting rod, and the front of the tabletop is also lowered through the buckle being lowered while the two inner legs are adjusted. Additionally, since the two outer legs and the two inner legs form an X-shaped pivoting structure, an angle between the two outer legs and the two inner legs can automatically increase.

In a preferred embodiment, the two inner legs are telescopic, and parts of the two inner legs below pivot points of the two inner legs and the two outer legs are telescopic. The tabletop is configured to be placed horizontally when the two inner legs are fully retracted, and when the two inner legs are in an extended state, the tabletop is placed in the state in which the front of the tabletop is lower than the rear of the tabletop. When the two inner legs are extended, the tabletop rotates forward around the pivot points of the two outer legs and the two inner legs, and the tabletop is adjusted to the front-lower, rear-higher state.

In a preferred embodiment, the two outer legs are telescopic, and parts of the two outer legs above pivot points of the two inner legs and the two outer legs are telescopic. The tabletop is configured to be placed horizontally when the two outer legs are fully retracted, and when the two outer legs are in an extended state, the tabletop is placed in the state in which the front of the tabletop is lower than the rear of the tabletop. Extending the two outer legs directly raises the rear of the tabletop, and since the two outer legs and the two inner legs form an X-shaped pivoting structure, the angle between the two outer legs and the two inner legs can be adjusted to decrease.

In a preferred embodiment, the two outer legs are telescopic, and parts of the two outer legs below pivot points of the two inner legs and the two outer legs are telescopic. The tabletop is configured to be placed horizontally when the two outer legs are fully extended, and when the two outer legs are in a shortened state, the tabletop is placed in the state in which the front of the tabletop is lower than the rear of the tabletop. When the two outer legs are shortened, the tabletop rotates forward around the pivot points of the two outer legs and the two inner legs, and the tabletop is adjusted to the front-lower, rear-higher state.

In a preferred embodiment, the buckle is a C-shaped buckle, and a front end of a top surface of the tabletop is disposed with a blocking strip.

A foldable desk comprises a tabletop, two outer legs symmetrically arranged on a left side and a right side of the tabletop, and two inner legs symmetrically arranged on the left side and the right side of the tabletop. An outer leg connecting rod is connected to upper ends of the two outer legs, and an inner leg connecting rod is connected to upper ends of the two inner legs. Each of the two outer legs is rotatably connected to one of the two inner legs disposed on a same side as a corresponding one of the two outer legs in an X-structure, and the tabletop is located between the two outer legs. Rear ends of sides of the tabletop are rotatably connected to the two outer legs, and the foldable desk comprises one or more tensioning members respectively connected to parts of the two inner legs above pivot points of the two inner legs and the two outer legs and parts of the two outer legs above the pivot points of the two inner legs and the two outer legs. The one or more tensioning members are in a tensioned state when the foldable desk is unfolded for use, and the inner leg connecting rod supports a front position of a lower side of the tabletop when the foldable desk is unfolded for use. The parts of the two inner legs above the pivot points of the two inner legs and the two outer legs are telescopic, and the tabletop is configured to be placed horizontally or switched to be placed in a state in which a front of the tabletop is lower than a rear of the tabletop. The tabletop is placed horizontally when the two inner legs are fully extended, and after the two inner legs are shortened, the tabletop is placed in the state in which the front of the tabletop is lower than the rear of the tabletop.

The two outer legs are pivotally connected to the tabletop, and the two inner legs do not need to be pivotally connected to the tabletop. When the foldable desk is unfolded for use, the one or more tensioning members pulls the two inner legs to enable the inner leg connecting rod to support the front end of the bottom surface of the tabletop, allowing the tabletop to be used directly. By adjusting the two inner legs to extend or retract, the tabletop can be placed horizontally or switched to a front-lower, rear-higher state. The structure is very simple, and the adjustment and folding operations are also very convenient.

In a preferred embodiment, the one or more tensioning members are webbing straps, linkage structures, ropes, or chains.

In a preferred embodiment, a front end of a bottom surface of the tabletop is disposed with a buckle, and the buckle is buckled to the inner leg connecting rod when the tabletop is unfolded and placed horizontally. The buckle can inhibit movement of the inner leg connecting rod, enhancing the stability of the tabletop.

In a preferred embodiment, the buckle is a C-shaped buckle, and a front end of a top surface of the tabletop is disposed with a blocking strip.

BRIEF DESCRIPTION OF THE DRAWINGS

The present disclosure will be further described below in conjunction with the accompanying drawings and embodiments.

FIG. 1 illustrates a perspective view of a foldable desk in Embodiment 1 of the present disclosure, when a tabletop is placed in a horizontal state.

FIG. 2 illustrates a side view of the foldable desk shown in FIG. 1, when the tabletop is placed in the horizontal state.

FIG. 3 illustrates a perspective view of the foldable desk shown in FIG. 1 in a folded state.

FIG. 4 illustrates a side view of the foldable desk shown in FIG. 1, when the tabletop is adjusted to a state in which a front of the tabletop is lower than a rear of the tabletop.

FIG. 5 illustrates another side view of the foldable desk shown in FIG. 1, when the tabletop is adjusted to the state in which the front of the tabletop is lower than the rear of the tabletop.

FIG. 6 illustrates a side view of a foldable desk in Embodiment 2 of the present disclosure, when a tabletop is placed in a horizontal state.

FIG. 7 illustrates a side view of the foldable desk shown in FIG. 6, when the tabletop is adjusted to a state in which a front of the tabletop is lower than a rear of the tabletop.

FIG. 8 illustrates another side view of the foldable desk shown in FIG. 6, when the tabletop is adjusted to the state in which the front of the tabletop is lower than the rear of the tabletop.

FIG. 9 illustrates a side view of a foldable desk in Embodiment 3 of the present disclosure, when a tabletop is placed in a horizontal state.

FIG. 10 illustrates a side view of the foldable desk shown in FIG. 9, when the tabletop is adjusted to a state in which a front of the tabletop is lower than a rear of the tabletop.

FIG. 11 illustrates another side view of the foldable desk shown in FIG. 9, when the tabletop is adjusted to the state in which the front of the tabletop is lower than the rear of the tabletop.

FIG. 12 illustrates a side view of a foldable desk in Embodiment 4 of the present disclosure, when a tabletop is placed in a horizontal state.

FIG. 13 illustrates a side view of the foldable desk shown in FIG. 12, when the tabletop is adjusted to a state in which a front of the tabletop is lower than a rear of the tabletop.

FIG. 14 illustrates another side view of the foldable desk shown in FIG. 12, when the tabletop is adjusted to the state in which the front of the tabletop is lower than the rear of the tabletop.

FIG. 15 illustrates a perspective view of a foldable desk in Embodiment 5 of the present disclosure, when a tabletop is placed in a horizontal state.

FIG. 16 illustrates a side view of the foldable desk shown in FIG. 15, when the tabletop is placed in the horizontal state.

FIG. 17 illustrates a side view of the foldable desk shown in FIG. 15, when the tabletop is adjusted to a state in which a front of the tabletop is lower than a rear of the tabletop.

FIG. 18 illustrates another side view of the foldable desk shown in FIG. 15, when the tabletop is adjusted to the state in which the front of the tabletop is lower than the rear of the tabletop.

FIG. 19 illustrates a perspective view of a foldable desk in Embodiment 6 of the present disclosure, when a tabletop is placed in a horizontal state.

FIG. 20 illustrates a side view of the foldable desk shown in FIG. 19, when the tabletop is placed in the horizontal state.

FIG. 21 illustrates a side view of the foldable desk shown in FIG. 19, when the tabletop is adjusted to a state in which a front of the tabletop is lower than a rear of the tabletop.

FIG. 22 illustrates another side view of the foldable desk shown in FIG. 19, when the tabletop is adjusted to the state in which the front of the tabletop is lower than the rear of the tabletop.

DETAILED DESCRIPTION OF THE EMBODIMENTS

The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present disclosure. It is evident that the described embodiments are preferred embodiments of the present disclosure and should not be regarded as exclusive of other embodiments. Based on the embodiments of the present disclosure, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present disclosure.

In the description of the present disclosure, it should be noted that the terms “horizontal”, “vertical”, “top”, “bottom”, “inner”, “outer”, “upper”, “lower”, “front”, “rear”, “left”, “right”, etc. indicate the orientation or positional relationship based on the orientation shown in the drawings. The positional relationship is only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the referenced device or element must have a specific orientation, be constructed, and be operated in a specific orientation. Therefore, the positional relationship should not be understood as a limitation of the present disclosure.

In the claims, specification, and accompanying drawings of the present disclosure, unless otherwise explicitly defined, the terms “fixedly connected” or “fixed connection” should be broadly interpreted. This means any connection method where there is no displacement or relative rotational movement between the two components. In other words, it includes non-removable fixed connections, removable fixed connections, integral connections, and fixed connections achieved through other devices or elements.

In the claims, specification, and the accompanying drawings of the present disclosure, terms such as “comprising,” “having,” and their variations are intended to mean “including but not limited to.”

Embodiment 1

Referring to FIGS. 1 to 5, a foldable desk comprises a tabletop 10, two outer legs 20 symmetrically arranged on a left side and a right side of the tabletop 10, and two inner legs 40 symmetrically arranged on the left and right sides of the tabletop 10. An outer leg connecting rod 30 is connected to upper ends of the two outer legs 20, and an inner leg connecting rod 50 is connected to upper ends of the two inner legs 40. Each of the two outer legs 20 is rotatably connected to one of the two inner legs 40 disposed on a same side as a corresponding one of the two outer legs 20 in an X-structure, and a pivot point is denoted by a letter O. The tabletop 10 is located between the two outer legs 20, and a rear end of a side of the tabletop 10 is rotatably connected to the two outer legs 20. A front end of a bottom surface of the tabletop 10 is disposed with a buckle 60, and the buckle 60 corresponds to the inner leg connecting rod 50. The buckle 60 is configured to be buckled to the inner leg connecting rod 50 when the foldable desk is unfolded for use. The two outer legs 20 or the two inner legs 40 are telescopic, and the tabletop 10 can be placed horizontally or switched to be placed in a state in which a front of the tabletop 10 is lower than a rear of the tabletop 10.

When in use, a front end of the tabletop 10 is rotated outward and upward, and the two inner legs 40 are unfolded to be buckled to the buckle 60. When folded, the two inner legs 40 are disposed in an inner side of the two outer legs 20, and the tabletop 10 is stacked on the two inner legs 40.

In this embodiment, the two inner legs 40 are telescopic, and a part of each of the two inner legs 40 above the pivot point O is telescopic. The tabletop 10 can be placed horizontally when the two inner legs 40 are fully extended as shown in FIG. 2. After shortening the two inner legs 40, the tabletop 10 is placed in the state in which the front of the tabletop 10 is lower than the rear of the tabletop 10 as shown in FIGS. 4 and 5. It should be understood that shortening the two inner legs 40 corresponds to lowering a height of a front end of the tabletop 10.

In this embodiment, a telescopic structure of each of the two inner legs 40 comprises an outer tube 41 and an inner tube 42 inserted into the outer tube, and the inner tube 42 and the outer tube 41 respectively comprises one or more positioning holes 43 and one or more elastic spherical heads 44. The one or more elastic spherical heads 44 are inserted into the one or more positioning holes 43 to achieve a length adjustment. The one or more positioning holes 43 can be a plurality of positioning holes to provide various adjustable lengths. A fully extended state of the two inner legs 40 refers to the two inner legs 40 being extended to a maximum length of the two inner legs 40. By inserting the one or more elastic spherical heads 44 into different positioning holes of the one or more positioning holes 43, different lengths of the two inner legs 40 can be achieved. A length of the two inner legs 40 in FIG. 5 is shorter than the length of the two inner legs 40 in FIG. 4.

Preferably, the buckle 60 is a C-shaped buckle. Additionally, a front end of a top surface of the tabletop 10 is disposed with a blocking strip 11.

Embodiment 2

Referring to FIGS. 6 to 8, the difference between Embodiment 2 and Embodiment 1 is that a part of each of the two inner legs 40 below the pivot point O is telescopic. The tabletop 10 is placed horizontally when the two inner legs 40 are fully retracted as shown in FIG. 6. After the two inner legs 40 are extended, the tabletop 10 is placed in a state in which a front of the tabletop 10 is lower than a rear of the tabletop 10 as shown in FIGS. 7 and 8.

In this embodiment, a fully retracted state of each of the two inner legs 40 refers to the two inner legs 40 being retracted to a minimum length of the two inner legs 40. By inserting the one or more elastic spherical heads into different positioning holes of the one or more positioning holes, different lengths of the two inner legs 40 can be achieved. A length of the two inner legs 40 in FIG. 7 is longer than the length of the two inner legs 40 in FIG. 6. The length of the two inner legs 40 in FIG. 8 is longer than the length of the two inner legs 40 in FIG. 7. It should be understood that extending the two inner legs 40 corresponds to the tabletop 10 rotating clockwise around the pivot point O.

Embodiment 3

Referring to FIGS. 9 to 11, the difference between Embodiment 3 and Embodiment 1 is that the two outer legs 20 are telescopic and a part of each of the two outer legs 20 above the pivot point O is telescopic. The tabletop 10 is placed horizontally when the two outer legs 20 are fully retracted as shown in FIG. 9. After the two outer legs 20 are extended, the tabletop 10 is placed in a state in which a front of the tabletop 10 is lower than a rear of the tabletop 10 as shown in FIGS. 10 and 11.

In this embodiment, a fully retracted state of each of the two outer legs 20 refers to the two outer legs 20 being retracted to a minimum length of the two outer legs 20. By inserting the one or more elastic spherical heads into different positioning holes of the one or more positioning holes, different lengths of the two outer legs 20 can be achieved. A length of the two outer legs 20 in FIG. 10 is longer than the length of the two outer legs 20 in FIG. 9. The length of the two outer legs 20 in FIG. 11 is longer than the length of the two outer legs 20 in FIG. 10. It should be understood that shortening the two outer legs 20 corresponds to raising a height of a rear end of the tabletop 10.

Embodiment 4

Referring to FIGS. 12 to 14, the difference between Embodiment 4 and Embodiment 1 is that the two outer legs 20 are telescopic and a part of each of the two outer legs 20 below the pivot point O is telescopic. The tabletop 10 is placed horizontally when the two outer legs 20 are fully extended as shown in FIG. 12. After the two outer legs 20 are shortened, the tabletop 10 is placed in a state in which a front of the tabletop 10 is lower than a rear of the tabletop 10 as shown in FIGS. 13 and 14.

In this embodiment, a fully extended state of each of the two outer legs 20 refers to the two outer legs 20 being extended to a maximum length of the two outer legs 20. By inserting the one or more elastic spherical heads into different positioning holes of the one or more positioning holes, different lengths of the two outer legs 20 can be achieved. A length of the two outer legs 20 in FIG. 13 is shorter than the length of the two outer legs 20 in FIG. 12. The length of the two outer legs 20 in FIG. 14 is shorter than the length of the two outer legs 20 in FIG. 13. It should be understood that shortening the two outer legs 20 corresponds to the tabletop 10 rotating clockwise around the pivot point O.

Embodiment 5

Referring to FIGS. 15 to 18, the difference between Embodiment 5 and Embodiment 1 is that one or more tensioning members 70 are provided. Two ends of each of the one or more tensioning members 70 are respectively connected to a part of a corresponding one of the two inner legs 40 above the pivot point O and a part of a corresponding one of the two outer legs 20 above the pivot point O. The one or more tensioning members 70 are in a tensioned state when the foldable desk is unfolded for use, and the one or more tensioning members 70 are configured to pull the two inner legs 40, so that the inner leg connecting rod 50 supports a front position of a lower side of the tabletop 10 when the foldable desk is unfolded for use. Like the structure in Embodiment 1, the part of each of the two inner legs 40 above the pivot point O is telescopic. The tabletop 10 can be placed horizontally or switched to be placed in the state in which the front of the tabletop 10 is lower than the rear of the tabletop 10. The tabletop 10 is placed horizontally when the two inner legs 40 are fully extended. After shortening the two inner legs 40, the tabletop 10 is placed in the state in which the front of the tabletop 10 is lower than the rear of the tabletop 10.

It can be understood that since the one or more tensioning members 70 can inhibit movement of the two inner legs 40 after the two inner legs 40 are unfolded, the buckle 60 can be removed. However, when the buckle 60 is retained on the front end of the bottom surface of the tabletop 10, the buckle 60 will be buckled to the inner leg connecting rod 50 when the tabletop 10 is unfolded and placed horizontally, making the tabletop 10 more stable.

It can be understood that during a shortening process of the two inner legs 40, a height of the inner leg connecting rod 50 decreases, and a position of the inner leg connecting rod 50 supporting the tabletop 10 moves inward.

In this embodiment, the one or more tensioning members 70 are webbing straps.

Embodiment 6

Referring to FIGS. 19 to 22, the difference between Embodiment 6 and Embodiment 5 is that the one or more tensioning members 70 are linkage structures. Alternatively, the one or more tensioning members 70 can also be replaced with ropes or chains.

The above description of the specification and embodiments is used to explain the scope of protection of the present disclosure, but does not constitute a limitation of the scope of protection of the present disclosure. Modifications, equivalent substitutions, or other improvements to the embodiments of the present disclosure or some of the technical features thereof that can be obtained by a person of ordinary skill in the art through logical analysis, reasoning, or limited experimentation by combining common knowledge, ordinary technical knowledge in the art, and/or prior art through the revelation of the present disclosure or the embodiments described above shall be included in the scope of protection of the present disclosure.

INDUSTRIAL APPLICABILITY

A foldable desk comprises a tabletop, two outer legs symmetrically arranged on a left side and a right side of the tabletop, and two inner legs symmetrically arranged on the left and right sides of the tabletop. An outer leg connecting rod is connected to upper ends of the two outer legs, and an inner leg connecting rod is connected to upper ends of the two inner legs. Each of the two outer legs is rotatably connected to one of the two inner legs disposed on a same side as a corresponding one of the two outer legs in an X-structure, and the tabletop is located between the two outer legs. Rear ends of sides of the tabletop are rotatably connected to the two outer legs, and a front end of a bottom surface of the tabletop is disposed with a buckle. At least one of the two outer legs or the two inner legs is telescopic, and the tabletop is configured to be placed horizontally or switched to be placed in a state in which a front of the tabletop is lower than a rear of the tabletop. The two outer legs are pivotally connected to the tabletop, and the two inner legs do not need to be pivotally connected to the tabletop. When the foldable desk is unfolded for use, the buckle inhibits movement of the inner leg connecting rod. By adjusting the two outer legs or the two inner legs to extend or retract, the tabletop can be placed horizontally or switched to a front-lower, rear-higher state. The structure is very simple, and the adjustment and folding operations are also very convenient.

Claims

1. A foldable desk, comprising: a tabletop,two outer legs symmetrically arranged on a left side and a right side of the tabletop, andtwo inner legs symmetrically arranged on the left side and the right side of the tabletop, wherein: an outer leg connecting rod is connected to upper ends of the two outer legs,an inner leg connecting rod is connected to upper ends of the two inner legs,each of the two outer legs is rotatably connected to one of the two inner legs disposed on a same side as a corresponding one of the two outer legs in an X-structure,the tabletop is located between the two outer legs,rear ends of sides of the tabletop are rotatably connected to the two outer legs,a front end of a bottom surface of the tabletop is disposed with a buckle configured to be buckled to the inner leg connecting rod when the foldable desk is unfolded for use,at least one of the two outer legs or the two inner legs is telescopic, andthe tabletop is configured to be placed horizontally or switched to be placed in a state in which a front of the tabletop is lower than a rear of the tabletop.

2. The foldable desk according to claim 1, wherein: the two inner legs are telescopic,parts of the two inner legs above pivot points of the two inner legs and the two outer legs are telescopic,the tabletop is configured to be placed horizontally when the two inner legs are fully extended, andwhen the two inner legs are in a shortened state, the tabletop is placed in the state in which the front of the tabletop is lower than the rear of the tabletop.

3. The foldable desk according to claim 1, wherein: the two inner legs are telescopic,parts of the two inner legs below pivot points of the two inner legs and the two outer legs are telescopic,the tabletop is configured to be placed horizontally when the two inner legs are fully retracted, andwhen the two inner legs are in an extended state, the tabletop is placed in the state in which the front of the tabletop is lower than the rear of the tabletop.

4. The foldable desk according to claim 1, wherein: the two outer legs are telescopic,parts of the two outer legs above pivot points of the two inner legs and the two outer legs are telescopic,the tabletop is configured to be placed horizontally when the two outer legs are fully retracted, andwhen the two outer legs are in an extended state, the tabletop is placed in the state in which the front of the tabletop is lower than the rear of the tabletop.

5. The foldable desk according to claim 1, wherein: the two outer legs are telescopic,parts of the two outer legs below pivot points of the two inner legs and the two outer legs are telescopic,the tabletop is configured to be placed horizontally when the two outer legs are fully extended, andwhen the two outer legs are in a shortened state, the tabletop is placed in the state in which the front of the tabletop is lower than the rear of the tabletop.

6. The foldable desk according to claim 1, wherein: the buckle is a C-shaped buckle, anda front end of a top surface of the tabletop is disposed with a blocking strip.

7. A foldable desk, comprising: a tabletop,two outer legs symmetrically arranged on a left side and a right side of the tabletop, andtwo inner legs symmetrically arranged on the left side and the right side of the tabletop, wherein: each of the two outer legs is rotatably connected to one of the two inner legs disposed on a same side as a corresponding one of the two outer legs in an X-structure,the tabletop is located between the two outer legs,rear ends of sides of the tabletop are rotatably connected to the two outer legs,a front end of a bottom surface of the tabletop is rotatably connected to upper ends of the two inner legs,at least one of the two outer legs or the two inner legs is telescopic, andthe tabletop is configured to be placed horizontally or switched to be placed in a state in which a front of the tabletop is lower than a rear of the tabletop.

8. The foldable desk according to claim 7, wherein: an outer leg connecting rod is connected to upper ends of the two outer legs,an inner leg connecting rod is connected to the upper ends of the two inner legs, andthe bottom surface of the tabletop is disposed with a buckle configured to be buckled to the inner leg connecting rod.

9. The foldable desk according to claim 7, wherein: the two inner legs are telescopic,parts of the two inner legs above pivot points of the two inner legs and the two outer legs are telescopic,the tabletop is configured to be placed horizontally when the two inner legs are fully extended, andwhen the two inner legs are in a shortened state, the tabletop is placed in the state in which the front of the tabletop is lower than the rear of the tabletop.

10. The foldable desk according to claim 7, wherein: the two inner legs are telescopic,parts of the two inner legs below pivot points of the two inner legs and the two outer legs are telescopic,the tabletop is configured to be placed horizontally when the two inner legs are fully retracted, andwhen the two inner legs are in an extended state, the tabletop is placed in the state in which the front of the tabletop is lower than the rear of the tabletop.

11. The foldable desk according to claim 7, wherein: the two outer legs are telescopic,parts of the two outer legs above pivot points of the two inner legs and the two outer legs are telescopic,the tabletop is configured to be placed horizontally when the two outer legs are fully retracted, andwhen the two outer legs are in an extended state, the tabletop is placed in the state in which the front of the tabletop is lower than the rear of the tabletop.

12. The foldable desk according to claim 7, wherein: the two outer legs are telescopic,parts of the two outer legs below pivot points of the two inner legs and the two outer legs are telescopic,the tabletop is configured to be placed horizontally when the two outer legs are fully extended, andwhen the two outer legs are in a shortened state, the tabletop is placed in the state in which the front of the tabletop is lower than the rear of the tabletop.

13. A foldable desk, comprising: a tabletop,two outer legs symmetrically arranged on a left side and a right side of the tabletop, andtwo inner legs symmetrically arranged on the left side and the right side of the tabletop, wherein: each of the two outer legs is rotatably connected to one of the two inner legs disposed on a same side as a corresponding one of the two outer legs in an X-structure,the tabletop is located between the two outer legs,rear ends of sides of the tabletop are rotatably connected to the two outer legs,the foldable desk comprises one or more tensioning members connected to the two inner legs,the one or more tensioning members are connected to the two outer legs above a position of pivot points of the two outer legs and the two inner legs,the one or more tensioning members are located above the position of the pivot points of the two outer legs and the two inner legs,the one or more tensioning members are in a tensioned state when the foldable desk is unfolded for use,upper ends of the two inner legs support a front position of a lower side of the tabletop,parts of the two inner legs above the pivot points of the two inner legs and the two outer legs are telescopic, andthe tabletop is configured to be placed horizontally or switched to be placed in a state in which a front of the tabletop is lower than a rear of the tabletop.

14. The foldable desk according to claim 13, wherein: an outer leg connecting rod is connected to upper ends of the two outer legs,an inner leg connecting rod is connected to the upper ends of the two inner legs,the tabletop is placed horizontally when the two inner legs are fully extended, andafter the two inner legs are shortened, the tabletop is placed in the state in which the front of the tabletop is lower than the rear of the tabletop.

15. The foldable desk according to claim 13, wherein: the one or more tensioning members are webbing straps, linkage structures, ropes, or chains.

16. The foldable desk according to claim 14, wherein: a front end of a bottom surface of the tabletop is disposed with a buckle, andthe buckle is buckled to the inner leg connecting rod when the tabletop is unfolded and placed horizontally.

17. The foldable desk according to claim 16, wherein: the buckle is a C-shaped buckle, anda front end of a top surface of the tabletop is disposed with a blocking strip.