JP3079321U - Folding desk leg frame - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To enable convenient use as the ratio of length and width at the time of development can be freely set, and to expand the development area without increasing the height. SOLUTION: Four corner table leg mechanisms 4, a first deployment mechanism 6 connected between end seats 44 and sliding sleeves 43 of the corner table leg mechanism 4 corresponding to left and right, and square desks corresponding to front and rear. A second unfolding mechanism 7 connected between the end seat 44 of the leg mechanism 4 and the sliding sleeve 43, and the first unfolding mechanism 6 or the second unfolding mechanism in the leg frame 3 of the folding desk which supports the desk surface plate 30 during unfolding. The second deploying mechanism 7 includes a pair of connecting rod sets having two connecting rods 71 and 72. The connecting rods 71 and 72 are pivotally attached to the end seat 44 and the sliding sleeve 43 of the square table leg mechanism 4, and are pivotally connected. At 77, the intersection is pivoted to end seat 44
In the upper connecting rod 72 and the lower connecting rod 71 pivotally connected to the sliding sleeve 43, the extending stepped portions 712 and 722 protruding from the pivot 77 are pivotally connected with the pivots 76 and 74, respectively.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a leg frame of a folding desk, and more particularly to a leg frame of a folding desk which can be set to have a larger ratio of a length and a width or a developed area when it is deployed to a predetermined height.

[0002]

[Prior art]

 Conventionally, folding desks are furniture that is convenient to carry and store. More specifically, a conventional folding desk generally includes a leg frame 1 and a desk panel 10, as shown in FIG.

The leg frame 1 includes four desk legs 11 having the same length. Each desk leg 11 includes an upper end seat 12 provided at an upper end, a lower end seat 13 provided at a lower end, and a sliding sleeve 14 provided so as to be able to slide linearly along the desk leg 11. In order to assemble each leg frame 11 in a three-dimensional manner, a deployment mechanism 15 is provided between each adjacent desk leg 11. The deployment mechanism 15 includes a pair of intersecting connecting rods 151. Each of the connecting rods 151 has its upper end pivotally connected to the upper end seat 12, the lower end pivotally connected to the sliding sleeve 14, and the intersection thereof pivotally connected to the support shaft 152.

[0004] Further, in order to bridge the desk panel 10 on the leg frame 1, one end is pivotally connected to one upper end seat 12 between the pair of opposed upper end seats 12 and the other end is connected to the other upper end seat. A support rod 16 mounted on and engaged with the seat 12 is provided. Further, a locking hook 18 that projects in the same direction is attached to each upper end seat 12.

On the other hand, the desk panel 10 is formed by connecting a number of plate members 101 orthogonal to the support rod 16 in parallel. The two plate members 101 located on the outer edges are provided with locking holes 102 which are engaged with and fixed to the locking hooks 18.

In a state where the above-mentioned conventional folding desk is deployed, each sliding sleeve 14 is pulled up to the same height of each desk leg 11. In addition, a pair of front and rear parallel support rods 16 are horizontally installed between the pair of upper end seats 12, respectively. When the desk plate 10 is placed on the leg frame 1 and the locking hooks 18 are locked in the corresponding locking holes 102, a square folding desk having the same length and width can be assembled.

On the other hand, at the time of folding, first, the desk surface plate 10 is removed, and the other end of the support rod 16 placed and engaged with the upper end seat 12 is rotated. Let Thereby, the connecting rod 151 of each deployment mechanism 15 can be moved toward the center with the support shaft 152 as a fulcrum. At this time, since the upper end of each connecting rod 151 is pivotally attached to the upper end seat 12, the sliding sleeve 14 gradually moves downward in the process of bringing the connecting rods 151 closer to each other, and the sliding sleeve 14 is moved downward. Stops at 13

[0008]

[Problems to be solved by the invention]

 However, the leg frame 1 of the conventional folding desk can maintain the space between the adjacent table legs 11 by deploying the respective unfolding mechanisms 15, but has a relatively small volume when the leg frame 1 is folded. In order to obtain the value (1), the length of the connecting rod 151 of each deployment mechanism 15 must be equal. Therefore, in the unfolded state, the four sliding sleeves 14 have the same height (distance) to move upward due to the regulation of the four sets of unfolding mechanisms 15, and all the intervals between the adjacent desk legs 11 are also equal. Therefore, regardless of the method of deployment, the leg frame 1 is formed in a square shape having an equal length ratio, and the height of the folding desk, the length of each connecting rod 151, the area where the whole is developed, etc. Limited across all.

[0009] Even if the area and shape of the above-mentioned folding desk are limited, the function as the folding desk does not decrease, but the area and the shape are standardized when the number of people surrounding the desk is relatively large. Folding desks are relatively inconvenient to use. Therefore, in such a case, it is necessary to add another folding desk to accommodate a large number of people.

On the other hand, in terms of manufacturing, if the two leg frames 1 are connected to each other to form a rectangular desk board, the use area can be expanded. However, the expansion mechanism 15 restricts the spread rectangular desk board. The length and width ratios are similarly limited. That is, the length is always an integral multiple of the width, and the size cannot be set at the desired ratio of length and width.

Therefore, in the present invention, the ratio of the length and the width at the time of development can be set freely, which can be used conveniently, and the development area can be expanded as desired without increasing the height. It is an object to provide a leg frame of a folding desk.

[0012]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the leg frames of the folding desk according to the present invention are provided at four corners of the leg frames, and are provided with upright-shaped table legs which are installed symmetrically adjacent to the front, rear, left and right. A sliding sleeve slidable in the vertical direction is provided, and four square table leg mechanisms having end seats disposed at the upper end and lower end thereof, respectively, and the end seat and the sliding sleeve of the square table leg mechanism corresponding to left and right, respectively. A pair of first unfolding mechanisms connected to each other and in a state corresponding to the front and rear, and a state corresponding to the left and right connected between the end seat and the sliding sleeve of the square table leg mechanism respectively corresponding to the front and rear. A pair of second unfolding mechanisms, wherein the first unfolding mechanism corresponding to the front and rear or the second unfolding mechanism corresponding to the left and right intersect each other in the leg frame of the folding desk that supports the desk plate at the time of unfolding. Rod with two connecting rods A portion of each of the connecting rod sets on the side of the square table leg mechanism is pivotally attached to an end seat of the square table leg mechanism and a sliding sleeve, and the connecting rod of each connecting rod set is pivotally connected. Extensions that protrude from the pivots at the upper row of each rod set pivotally attached to the end seat and at the lower row of each rod set pivotally attached to the sliding sleeve. The steps are configured to be pivotally connected to each other.

In the leg frame of the folding desk, it is preferable that the first and second unfolding mechanisms include a pair of connecting rod sets each having two connecting rods intersecting each other.

In addition, an intermediate pedestal mechanism is disposed between the left and right square pedestal mechanisms, and a second unfolding mechanism is provided between a pair of intermediate pedestal mechanisms installed before and after. Preferably, a third deployment mechanism is provided, and the structure of the third deployment mechanism is the same as that of the second deployment mechanism.

In this case, the intermediate pedestal mechanism includes a sliding sleeve slidable up and down along the pedestal, and a lower end seat, and the third deployment mechanism is provided with a sliding sleeve of the two intermediate pedestal mechanisms. It is preferable to provide a support rod fixed between the square table leg mechanism and the intermediate table leg mechanism, and a suspension mechanism between the corresponding support rods. Good.

In addition, the hanging mechanism includes a pair of orthogonal rods orthogonal to the support rod, and a contact head that abuts and locks on both ends of each orthogonal rod so as to abut the inner side of the support rod. In addition, a pair of parallel rods parallel to the support rods are erected between the pair of orthogonal rods, and the ends of each parallel rod abut and lock so as to project inside the orthogonal rods. A contact head is provided, and a suspending means having a pair of hanging steps is suspended from the orthogonal rod, and sliding pieces are pivotally attached to the lower ends of the four hanging steps, respectively. It is preferable to suspend a hanging shelf between the sliding pieces.

Further, a second sliding sleeve is provided on a desk leg of the intermediate table leg mechanism, and a locking piece and a locking member that engage with each other when the leg frame is deployed are provided on the sliding sleeves corresponding to the upper and lower sides. It is preferable to provide pins.

Further, it is preferable that an intersecting rod set is disposed between the upper connecting rod and the lower connecting rod that constitute the pair of connecting rod sets.

The leg frame of the folding desk of the present invention configured as described above does not require, for example, the provision of an upright rod between a pair of front and rear square table legs and a pair of intermediate table legs parallel to these. . For this reason, a plurality of cross rod sets can be connected between the extending steps as necessary, so that the width of the leg frame when expanded can be increased. Therefore, the spread width of the leg frame is not limited, and it is possible to easily assemble the leg frame that can be developed to various different length and width ratios as needed.

[0020]

[Embodiment of the invention]

 Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings. As shown in FIGS. 1 and 2, the leg frame 3 according to the embodiment of the present invention is firmly installed on the ground in a stable state, and is used as a folding desk by laying a desk panel 30 on the upper surface. Things. The desk surface plate 30 is formed by joining a number of plate members 301 in parallel, and has an opening 302 provided vertically in the center thereof.

The leg frame 3 of the present embodiment includes four square table leg mechanisms 4, two intermediate table leg mechanisms 5, four first deployment mechanisms 6, two second deployment mechanisms 7, and one third And a hanging mechanism 9.

As shown in FIGS. 1 and 3, each of the square table leg mechanisms 4 is provided at each of the four corners of the leg frame 3 and stands upright on the ground in a symmetrical manner in front, rear, left and right. Each square table leg mechanism 4 includes a square table leg 41 composed of an upright rod, a lower end seat 42 is attached to the lower end of each square table leg 41, and a square sliding sleeve that slides linearly along the rod. 43 is fitted. In addition, an upper end seat 44 is provided at the upper end of each square desk leg 41. On the angular sliding sleeve 43 and the upper end seat 44, pivoting ears 431 and 441 projecting in the direction of the adjacent square table leg mechanism 4 are provided in a protruding manner. Each upper end seat 44 has a locking hook 442 projecting outwardly in the front-rear direction. One end of a support rod 45 having a predetermined length is pivotally connected near each locking hook 442, and the other end is rotatable inward in the middle direction of the adjacent square table leg 41. 451 are formed.

As shown in FIGS. 1, 3, and 4, the intermediate leg mechanism 5 is disposed between the left and right square leg mechanisms 4 and provided so as to correspond to the front and rear. An intermediate table leg 51 made of an upright rod is provided. A lower end seat 52 is attached to the lower ends of the intermediate table legs 51. In addition, a lower sliding sleeve 53 positioned below and an upper sliding sleeve 54 positioned above are fitted in these intermediate table legs 51 so as to be slidable along the rod. Further, an upper end seat 55 is provided at an upper end of the intermediate desk leg 51. The lower sliding sleeve 53 is provided with a pair of pivotal ears 531 protruding toward the square table legs 41 on both sides. The upper sliding sleeve 54 is provided with a pivotal ear 541 that projects in the front-rear direction. Further, in order to enhance the stability when the leg frame 3 is expanded, the upper sliding sleeve 54 is provided with a locking groove 561 and a locking piece 56 that can rotate downward. On the other hand, the lower sliding sleeve 53 is provided with a locking pin 57 having a configuration in which the locking groove 561 of the locking piece 56 is locked to the neck portion 571 so as to vertically correspond to the locking piece 56. are doing. The upper end seat 55 has a holding groove 551 for fixing the joint end 451 of the support rod 45 of the square table leg mechanism 4 on both sides, and also has a pivotal ear 552 extending to the left and right sides.

As shown in FIGS. 1 and 3, each of the first unfolding mechanisms 6 is mounted between the adjacent left and right square table leg mechanisms 4 and the intermediate table leg mechanism 5, and each of the first unfolding mechanisms 6 is mounted in a cross shape. And a pair of crossed connecting rods 61. These intersecting rods 61 are pivotally connected at an intermediate portion by a first pivot 62, and are configured to be rotatable about the pivot 62 as a fulcrum. Both ends of each of the intersecting rods 61 are pivotally connected to the pivot ears 431 and 441 of the square leg mechanism 4 and the pivot ears 531 and 552 of the intermediate leg mechanism 5 by the second pivot 63, respectively. I have.

As shown in FIGS. 2 and 3, each of the second unfolding mechanisms 7 is assembled between the square table leg mechanisms 4 installed so as to be adjacent to each other, and includes a lower connecting rod 71 and an upper connecting rod. It consists of a pair of connecting rod sets having 72. The lower connecting rod 71 has a lower end pivotally connected to a pivoting ear 431 of the angular sliding sleeve 43 by a third pivot 73. The lower connecting rod 71 of each connecting rod set has its upper end pivotally connected to each other by a fourth pivot 74. The upper connecting rod 72 has its upper end pivotally connected to a pivoting ear 441 of the upper end seat 44 corresponding to the front and rear by a fifth pivot 75. Further, the upper connecting rod 72 of each connecting rod set has its lower end overlapped by a sixth pivot 76 so as to be pivotally attached. Each of the intersections of the upper and lower connecting rods 72, 71 is pivotally connected by a seventh pivot 77. In the present embodiment, the upper pivot rod 72 is moved by the seventh pivot 77 so as to extend between the pivot step 721 on the side of the square base 41 and the seventh and sixth pivots 77 and 76. The part 722 is partitioned. Similarly, the lower connecting rod 71 is partitioned into a pivot step 711 and an extension step 712 by the seventh pivot 77. The length of the pivoting steps 711 and 721 is designed to be half (1/2) of the cross rod 61, and the length of each leg 712 and 722 determines the developed width of the leg frame 3. I do.

The third unfolding mechanism 8 is installed between a pair of intermediate desk leg mechanisms 5 installed between the front and rear desk legs 41 and corresponds to the second unfolding mechanism 7 and the left and right. It corresponds to. The third unfolding mechanism 8 has the same configuration as the second unfolding mechanism 7, and has two sets of a large number of eighth pivots 81 pivotally connected to a series of rods 82 corresponding to each other at the same height. ing. Each pivot 82 is provided with a pivot step 821 and an extension step 822 by the pivot 81, and the lower ends of the pair of lower rods 82 are pivotally attached to the lower end seat 52, respectively. It differs from the second deployment mechanism 7 only in that the upper ends of the connecting rods 82 are pivotally attached to the upper sliding sleeves 54, respectively.

As shown in FIGS. 2 and 5, the hanging mechanism 9 hangs on four horizontal support rods 45 corresponding to the opening 302 of the desk surface plate 30 and the upper and lower sides thereof and installed horizontally. . Specifically, the hanging mechanism 9 includes two orthogonal rods 91 installed orthogonally to the support rod 45. At both ends of these orthogonal rods 91, abutment heads 92 are provided, which abut and lock in a state of protruding inside the support rod 45, respectively. Further, a pair of parallel rods 93 parallel to the support rods 45 are provided between the orthogonal rods 91. At both ends of the parallel rods 93, abutment heads 94 are provided, which abut and lock in a state of being protruded inside the orthogonal rod 91. Further, hanging means 95 are suspended from the orthogonal rods 91, respectively. The hanging means 95 is provided with two hanging steps 951, and sliding pieces 96 are pivotally attached to the lower ends of the four hanging steps 951, respectively. A suspending shelf 97 is suspended between these four sliding pieces 96.

As shown in FIGS. 1 to 3, when the leg frame 3 of the present embodiment is expanded, each of the angular sliding sleeves 43 and the lower sliding sleeves 53 move upward, respectively. It is located at the height of the intermediate part of the intermediate table leg 51. At this time, in each of the first unfolding mechanisms 6, the included angle α on the side of the square table leg 41 and the intermediate table leg 51 is equal, and the heights of the angular sliding sleeve 43 and the lower sliding sleeve 53 are the same. For this reason, the included angle β of the pair of second unfolding mechanisms 7 on the side of the square foot 41 is also equal to the included angle α, and all have the same triangular state.

At this time, since both the second and third unfolding mechanisms 7 and 8 have the extending steps 712 and 722, the same side corner machine is provided depending on the length of the extending steps 712 and 722. The width between the legs 41 can be increased. That is, the height of the leg frame 3 is determined by the angular sliding sleeve 43 and the lower sliding sleeve 53 that move upward in synchronization with each other, and the width is determined by the extension steps 712 and 722 of the second and third deployment mechanisms 7 and 8. In order to determine, the leg frame 3 of this embodiment can be developed in a rectangular shape.

As shown in FIG. 4, in the present embodiment, in order to enhance the stability at the time of deployment, the locking piece 56 provided on the upper sliding sleeve 54 is rotated downward so that the lower locking pin 57 It is locked to the net 571. In addition, the hanging mechanism 9 is provided on the four support rods 45, so that a tool such as a furnace can be placed on the hanging shelf 97 for use. In the present embodiment, the reason why the third unfolding mechanism 8 is mounted on the lower side is that the above-mentioned hanging mechanism 9 is installed downward, and it is necessary to hang the hanging mechanism 9. If not, the third unfolding mechanism 8 may be provided on the upper side similarly to the second unfolding mechanism 7.

On the other hand, when the leg frame 3 of the present embodiment is folded, as shown in FIGS. 2, 6, and 7, the hanging mechanism 9 is first removed, and the locking piece 56 is turned upward. After that, the four first deployment mechanisms 6 are brought together toward the central part. Then, each of the angular sliding sleeves 43 and the lower sliding sleeve 53 of the intermediate leg frame mechanism 5 slide downward, and are deployed until the included angle α of the double connecting rod 61 of the first deployment mechanism 6 is maximized. Thereby, the angular sliding sleeve 43 and the lower sliding sleeve 53 are lowered to the lowermost end, and the second deploying mechanism 7 and the third deploying mechanism 8 are converged to the smallest state.

The leg frame 3 of the folding desk according to the present invention is not limited to the configuration of the above embodiment. For example, in the above embodiment, the width of the leg frame 3 at the time of deployment is determined by the length of the extension steps 712 and 722. However, the upright stands between the front and rear square legs 41 and between the intermediate legs 51 parallel thereto. As shown in FIG. 8, a set of crossing rods 70 may be connected between the extending steps 712 and 722 as desired, since there is no need to provide rods for the crossing. This makes it possible to increase the width of the leg frame 3 when deployed. Therefore, the width when the leg frame 3 is deployed is not limited, and the leg frame 3 that can be deployed to various different lengths and width ratios as needed can be conveniently assembled.

Further, the leg frame of the folding desk according to the present invention may be configured as shown in FIG. Specifically, in this modified example, similarly to the above-described embodiment, an even number of table leg mechanisms 21 are provided so as to correspond to the front and rear. A first unfolding mechanism 22 is provided between the left and right adjacent table leg mechanisms 21, and a similar first unfolding mechanism 22 is provided between the left and right adjacent table leg mechanisms 21. I have. Further, a configuration may be adopted in which the second deployment mechanism 23 is provided between the desk leg mechanisms 21 corresponding to the front and rear. In the embodiment configured in this manner, the first and second unfolding mechanisms 22 and 23 have the same structure, and each of the unfolding mechanisms 22 and 23 includes a pair of connecting rods 24 in which both are installed in an intersecting manner. Configuration. With this design, it is possible to increase the area of the leg frame 2 when the desk frame 2 is deployed in a situation where it is not necessary to lengthen the table legs.

Further, in the embodiment of the present invention, the length of the leg frame in the horizontal direction can be determined by the arrangement of the unfolding mechanisms. In addition, four desk leg mechanisms and four unfolding mechanisms are provided for assembling. Then, a crossed rod structure is further formed between any one of the unfolding mechanism deploying mechanisms corresponding to the left-right direction, or any one of the unfolding mechanisms corresponding to the longitudinal direction. Leg frames with different length and width ratios can be assembled. Therefore, six desk leg mechanisms are not necessarily required.

Further, in the embodiment, as shown in FIG. 3, the first unfolding mechanism is assembled at the front and the rear of the folding desk, respectively. May be provided. At this time, the second and third deployment mechanisms are attached in front, rearward, and between them in parallel. Thus, the leg frame of the folding desk of the present invention can be variously modified.

In the present invention, for example, in the embodiment shown in FIG. 9, it is possible to develop a square folding desk of 80 cm × 80 cm while maintaining the height of the desk face plate at 60 cm, or 100 cm × 80 cm. It can also be deployed on an 80 cm rectangular folding desk.

[0037]

[Effect of the invention]

 As is clear from the above description, the leg frame of the folding desk of the present invention can improve the disadvantage that the ratio of length and width is limited when the conventional folding desk is developed. In other words, the area where the leg frames are deployed can be expanded under circumstances where the height of the folding desk is not increased. Therefore, a person skilled in the art can construct a leg frame that can be developed into a rectangular shape having different lengths and width ratios and areas according to the user's request.

[Brief description of the drawings]

FIG. 1 is an exploded front view showing a relationship between a leg frame and a desk board of a folding desk according to an embodiment of the present invention.

FIG. 2 is an exploded side view of FIG.

FIG. 3 is a perspective view showing a deployed state of a desk leg.

FIG. 4 is a perspective view showing the intermediate table leg mechanism of FIG. 1;

FIG. 5 is a perspective view showing a hanging mechanism installed on a table leg.

FIG. 6 is a front view showing a state where the table legs are folded and converged.

FIG. 7 is a side view of FIG. 6;

FIG. 8 is a side view showing a modification of the embodiment of the present invention.

FIG. 9 is a perspective view showing another modification of the embodiment of the present invention.

FIG. 10 is an exploded perspective view of Taiwanese new patent publication No. 361138 according to the present applicant, which is a conventional example.

[Explanation of symbols]

2,3: leg frame 21: desk leg mechanism 6, 22: first deployment mechanism 7, 23: second deployment mechanism 24, 82: connecting rod 30: desk board 301: plate material 302: opening 4: square machine Leg mechanism 41: Square table legs 42, 52: Lower end seat 43: Square sliding sleeve 431, 441, 531, 541, 552: Pivot ear 44, 55: Upper end seat 442: Locking hook 45: Supporting rod 451: Joint end Part 5: Intermediate table leg mechanism 51: Intermediate table leg 53: Lower sliding sleeve 54: Upper sliding sleeve 551: Nipping groove 56: Locking piece 561: Locking groove 57: Locking pin 571: Neck part 61: Crossing connection Rod 62: First pivot 63: Second pivot 70: Crossing rod 71: Lower connecting rod 711, 721, 821: Pivoting step 712, 722
822: extension step portion 72: upper connecting rod 73: third pivot 74: fourth pivot 75: fifth pivot 76: sixth pivot 77: seventh pivot 8: third deployment mechanism 81: third 8 Axis 9: Hanging mechanism 91: Orthogonal rod 92, 94: Contact head 93: Parallel rod 95: Hanging means 951: Hanging step 96: Sliding piece 97: Hanging shelf

Claims (7)

[Utility model registration claims] An upright desk leg which is positioned at four corners of a leg frame and is installed symmetrically adjacent to the front, rear, left and right, and a sliding sleeve slidable up and down along each desk leg is provided. 4 with end seats at each upper and lower end
A pair of first unfolding mechanisms connected between end seats and sliding sleeves of the above-mentioned square desk leg mechanism corresponding to the left and right, respectively, and forming a state corresponding to the front and rear; A pair of second unfolding mechanisms connected between the end seats and the sliding sleeves of the square desk leg mechanism, and supporting the desk surface plate at the time of unfolding. The first deploying mechanism corresponding to the front and rear or the second deploying mechanism corresponding to the left and right includes a pair of connecting rod sets having two connecting rods crossing each other, and the square table in each of the connecting rod sets of the connecting rod set. A portion on the side of the leg mechanism is pivotally attached to the end seat and the sliding sleeve of the square table leg mechanism, and the intersection of the connecting rods of each connecting rod set is pivotally connected by a pivot, and each of the links pivotally connected to the end seat is pivoted. Upper connecting rod of rod set and above sliding sleeve A leg frame of a folding desk, wherein, in a lower connecting rod set of each connecting rod set, an extending step portion protruding from the pivot is pivotally attached to each of the extending rods. 2. The folding desk according to claim 1, wherein each of the first and second unfolding mechanisms includes a pair of connecting rod sets each having two connecting rods intersecting each other. Leg frame. 3. A method according to claim 1, further comprising:
An intermediate pedestal mechanism is provided, and a third deployment mechanism corresponding to the second deployment mechanism is provided between a pair of intermediate pedestal mechanisms installed in front and rear, and the structure of the third deployment mechanism is changed. The leg frame of the folding desk according to claim 1 or 2, wherein the leg frame is the same as the second deployment mechanism. 4. The intermediate table leg mechanism includes a sliding sleeve slidable up and down along the table leg and a lower end seat, and the third deploying mechanism includes a sliding sleeve and lower ends of the both intermediate table leg mechanisms. A support rod fixed to the intermediate table leg mechanism, and a suspension mechanism is provided between the corresponding support rods. Item 4. The leg frame of the folding desk according to Item 3. 5. The hanging mechanism includes a pair of orthogonal rods orthogonal to the support rods, and abutment heads that abut against and lock the ends of each orthogonal rod so as to protrude inside the support rods. A pair of parallel rods parallel to the support rods are installed between the pair of orthogonal rods, and a contact head that abuts and locks both ends of each parallel rod so as to protrude inside the orthogonal rod respectively. A hanging means having a pair of hanging steps is suspended from the orthogonal rod, and a sliding piece is pivotally attached to the lower end of each of the four hanging steps, and a hanging shelf is hung between the four sliding pieces. The leg frame of the folding desk according to claim 4, wherein the frame is lowered. 6. A second sliding sleeve is provided on a desk leg of the intermediate table leg mechanism, and a locking piece and a locking pin which engage with each other when the leg frame is unfolded are provided on the sliding sleeves corresponding to the upper and lower sides. The leg frame of the folding desk according to claim 4 or 5, wherein a leg frame is provided. 7. The leg frame of the folding desk according to claim 1, wherein an intersecting rod set is disposed between the upper connecting rod and the lower connecting rod forming the pair of connecting rod sets.