CN212298391U

CN212298391U - Folding type support

Info

Publication number: CN212298391U
Application number: CN202020762832.8U
Authority: CN
Inventors: 周世旺
Original assignee: Shenzhen Yili Innovation Design Co ltd
Current assignee: Shenzhen Yili Innovation Design Co ltd
Priority date: 2020-05-08
Filing date: 2020-05-08
Publication date: 2021-01-05
Anticipated expiration: 2030-05-08

Abstract

The utility model provides a folding bracket, which comprises a telescopic platform and a lifting part; the lift portion includes two sets of folding support frames that are located the telescopic platform left and right sides, and folding support frame includes first bracing piece and second bracing piece, and the second bracing piece still is provided with the extension rod that extends towards keeping away from telescopic platform one side in the pin joint department with first bracing piece. The utility model provides a folding bracket which comprises a telescopic platform and a lifting part, the bracket structure is simple when in storage, the occupied space is small, and the whole folding bracket can be conveniently stored and carried; the expansion platform can adjust the expansion size according to the size of a placed product, so that the adaptability of the support is improved; folding support frame is provided with the extension rod on the second bracing piece, can change the relative angle of flexible platform and desktop through addding of extension rod for place the angle between the screen of electronic product and the user on flexible platform and laminate ergonomic angle of use more, travelling comfort when improving the electronic product and using.

Description

Folding type support

Technical Field

The utility model belongs to the technical field of digital electronic accessories technique and specifically relates to a foldable support is related to.

Background

With the continuous development of science and technology, the notebook computer, the smart phone and the tablet device are continuously popularized, and the electronic product of the type becomes an intelligent digital device which is required to be used at any time in daily life of people. Particularly, a notebook computer, as a light and portable personal computer, has the advantages of small volume, light weight and portability, and becomes a basic product for replacing a conventional desktop computer as a mobile office. However, when the notebook computer, the smart phone or the tablet device is used, in order to keep a relatively proper use angle between the screen of the device and the user, the device needs to be effectively fixed on the desktop by matching with the auxiliary support.

The following problems generally exist in the auxiliary support on the market at present: firstly, the support is low in applicability, generally suitable for a notebook computer, and not suitable for flat equipment or other electronic products such as a smart phone, so that supports with the same size need to be matched for different electronic equipment; secondly, the supporting angle formed by the bracket and the desktop is relatively fixed and cannot be adjusted, so that the angle between the display screen of the electronic product on the bracket and a user is relatively fixed, and therefore the bracket cannot meet the adjustment requirements of different electronic products or different supporting angles of the same electronic product; third, the current support to notebook computer uses is mostly flat structure, and whole occupation space is great, and is inconvenient to accomodate, is unfavorable for carrying in the lump of support and electronic product more.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to solve the current shortcoming of inconvenient accomodating greatly of the unable regulation of support suitability for electronic product and occupation space lower, angle, provide a foldable support.

The utility model provides a technical scheme that its technical problem adopted is: a folding bracket comprises a telescopic platform for placing a product and a lifting part for arranging the telescopic platform on a desktop; the lift portion includes that two sets of being located the folding support frame of the telescopic platform left and right sides, folding support frame is first bracing piece and the second bracing piece that is a style of calligraphy structure when drawing in, the one end of first bracing piece with the pin joint of second bracing piece, the other end of first bracing piece with the front side of telescopic platform is articulated, the one end of second bracing piece with the rear side of telescopic platform is articulated, first bracing piece with when the second bracing piece expandes with telescopic platform forms first triangle bearing structure on vertical face, the second bracing piece with the pin joint department of first bracing piece still is provided with towards keeping away from the extension rod that telescopic platform one side extended.

Furthermore, the folding support frame further comprises a third support rod which can be folded and arranged with the first support rod, one end of the third support rod is pivoted with the first support rod, and the first support rod and the third support rod form a second triangular support structure on a vertical surface with the extension rod when unfolded.

Specifically, a first bending portion is disposed at a pivot joint of the third support bar and the first support bar, and the third support bar is folded at the bottom of the first support bar through the first bending portion.

Specifically, the end of the first support rod is provided with a notch for the extension rod of the second support rod to be inserted into.

Specifically, an inclined surface abutting against the third support rod is arranged on the extension rod, and the third support rod can abut against the inclined surface of the extension rod.

Furthermore, the folding support frame further comprises a fourth support rod pivoted to the end of the first support rod, and the pivot joint of the fourth support rod and the first support rod is located at the hinge joint of the first support rod and the telescopic platform.

Specifically, a second bending portion is further disposed at a pivot joint of the fourth support bar and the first support bar, and the fourth support bar is folded at the bottom of the first support bar through the second bending portion.

Furthermore, the telescopic platform comprises a first linkage rod and a second linkage rod which are arranged in a cross mode, the middle parts of the first linkage rod and the second linkage rod are pivoted, and the end part of the first linkage rod is movably connected with the end part of the second linkage rod through the lifting part.

Specifically, first gangbar is in pin joint department is provided with third bending portion, in be provided with first recess on the third bending portion, the second gangbar is in pin joint department is provided with fourth bending portion, in be provided with the second recess on the fourth bending portion, first recess with the second recess splices each other, makes first gangbar with when second gangbar intercrossing draws in first gangbar's side with the side of second gangbar is laminated each other.

Specifically, the telescopic platform further comprises a stopping block hinged to the end part of the first linkage rod and/or the end part of the second linkage rod, and the stopping block and the first supporting rod are hinged to two sides of the first linkage rod or the second linkage rod respectively.

The utility model provides a foldable support's beneficial effect lies in: the telescopic platform is of a rod body structure after being stored, the two folding support frames of the lifting part are of a linear structure after being stored and are folded at the bottom of the telescopic platform, the support structure during storage is simple, the occupied space is small, and the whole folding support is convenient to store and carry; meanwhile, the expansion platform of the folding bracket can adjust the expansion size according to the size of a placed product, is suitable for most electronic products in the market, and improves the adaptability of the bracket; simultaneously, the folding support of this foldable support's lift portion is provided with the extension rod on the second bracing piece, can change the relative angle of flexible platform and desktop through addding of extension rod, make the angle of placing between the screen of electronic product and the user on flexible platform laminate ergonomic use angle more, travelling comfort when improving the electronic product use, and this foldable support can also improve the circulation of electronic product bottom air when expanding, strengthen the radiating efficiency of electronic product, and simultaneously, this flexible platform all adopts the metal preparation with lift portion, and support intensity is high, moreover, the steam generator is simple in structure, light in weight.

Drawings

Fig. 1 is a schematic perspective view of a foldable stand according to the present invention;

fig. 2 is a schematic perspective exploded view of a foldable stand according to the present invention;

fig. 3 is a side view of the foldable stand according to the present invention in a folded state;

fig. 4 is a side view of a first expanded state of a foldable stand according to the present invention;

fig. 5 is a side view of a second expanded state of a foldable stand according to the present invention;

fig. 6 is a side view of a third unfolded state of the foldable stand according to the present invention;

fig. 7 is a side view of a fourth unfolded state of the foldable stand according to the present invention.

In the figure: 100-folding type bracket, 10-telescopic platform, 11-first linkage rod, 111-third folding part, 112-first groove, 12-second linkage rod, 121-fourth folding part, 122-second groove, 13-stop block, 131-stop column, 132-stop pad, 14-universal shaft, 15-non-slip pad, 20-lifting part, 21-folding support frame, 211-first support rod, 2111-notch, 2112-magnet, 212-second support rod, 2121-extension rod, 2122-inclined plane, 213-third support rod, 2131-first folding part, 214-fourth support rod, 2141-second folding part, 22-first triangular support structure and 23-second triangular support structure.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1-7, a foldable stand 100 is provided. The folding bracket 100 can be applied to most of the existing electronic products, the electronic products are fixed on the desktop, and the display screens of the electronic products and the desktop form different angles, so that a relatively proper angle can be formed between the screen of the electronic product and a user, and the use comfort of the electronic products is improved. The folding support 100 can be used for electronic products such as a notebook computer, a tablet personal computer and a smart phone, can also be used for supporting paper products such as books and magazines, and can fix books of different sizes when the books are not convenient to take.

As shown in fig. 1, 2 and 4, the present invention provides a foldable stand 100 with a schematic view of the same unfolded state. As shown in fig. 1, the foldable stand 100 includes a telescopic platform 10 for placing a product and a lifting part 20 for placing the telescopic platform 10 on a table. The telescopic platform 10 can be used for fixedly placing different products such as electronic products or books, the lifting part 20 is used for supporting the telescopic platform 10 on a desktop, different angles are formed between the plane of the telescopic platform 10 and the desktop, and the adjustment of the angles between the products and the desktop on the telescopic platform 10 is realized through the adjustment of the different angles.

As shown in fig. 1, the telescopic platform 10 includes a first linkage rod 11 and a second linkage rod 12 which are disposed in a cross manner and are pivoted at the middle portion, and a lifting portion 20 movably connects an end portion of the first linkage rod 11 with an end portion of the second linkage rod 12. The first linkage rod 11 and the second linkage rod 12 are pivoted in the middle, two ends can freely open at an angle according to requirements, and the first linkage rod 11 and the second linkage rod 12 are opened in an X shape. A plane is formed in the area involved by the first linkage bar 11 and the second linkage bar 12, which plane supports the product placement. The supporting area of the telescopic platform 10 can be changed by adjusting the opening angle between the first linkage rod 11 and the second linkage rod 12, so that the supporting area of the first linkage rod 11 and the second linkage rod 12 can be adjusted according to the size of a placed product. The telescopic platform 10 can be adapted to be used for products of different sizes. The utility model provides a foldable support 100 can be applicable to the demand of placing of most electronic product and the books of various sizes on the market basically.

As shown in fig. 2, a rotating shaft is disposed at the center of the first linkage rod 11 and the second linkage rod 12 of the telescopic platform 10, and the center of the first linkage rod 11 and the center of the second linkage rod 12 are pivoted to the rotating shaft. A third bending part 111 is arranged at the pivot joint of the first linkage rod 11, a first groove 112 is arranged on the third bending part 111, a fourth bending part 121 is arranged at the pivot joint of the second linkage rod 12, a second groove 122 is arranged on the fourth bending part 121, and the first groove 112 and the second groove 122 are spliced with each other, so that the side edge of the first linkage rod 11 is attached to the side edge of the second linkage rod 12 when the first linkage rod 11 and the second linkage rod 12 are crossed and folded. The first groove 112 and the second groove 122 are provided to ensure that the first linkage rod 11 and the second linkage rod 12 can form a complete rectangular rod structure when being folded, so as to reduce the occupied volume of the telescopic platform 10 in a folded state as much as possible, and facilitate the folding support 100 to be stored and carried when being folded.

Further, in order to ensure the stability of the product placed on the telescopic platform 10 when the telescopic platform 10 forms a certain angle with respect to the table top, the product is placed on the telescopic platform 10. The telescopic platform 10 further comprises a stop block 13 hinged to the end of the first linkage rod 11 and/or the second linkage rod 12, and the stop block 13 and the first support rod 211 are hinged to two sides of the first linkage rod 11 or the second linkage rod 12 respectively. As shown in fig. 2, in this embodiment, two stop blocks 13 are respectively disposed on the telescopic platform 10, and the two stop blocks 13 are respectively disposed on the end portions of the first linkage rod 11 and the second linkage rod 12 close to the table top. The stop block 13 includes a stop post 131 hinged to the first linkage rod 11 and/or the second linkage rod 12, and a stop pad 132 disposed on the stop post 131. The stop pad 132 also serves both as a scratch and slip stop. Correspondingly, through holes for folding the stop block 13 are also arranged on the first linkage rod 11 and the second linkage rod 12. As shown in fig. 3, in the folded state, the stop block 13 is received in the through holes of the first linkage rod 11 and the second linkage rod 12, and occupies no additional space. As shown in fig. 1, after the telescopic platform 10 is unfolded, the stop block 13 extends from the through hole and abuts against a side surface of the through hole, so that the stop block 13 is perpendicular to the first linkage rod 11 or the second linkage rod 12, thereby playing a role in preventing a product placed on the telescopic platform 10 from sliding off the telescopic platform 10.

Two ends of a first linkage rod 11 on the retractable product platform 10 are respectively hinged with two groups of folding support frames 21 on the lifting part 20. Two ends of the second linkage rod 12 are also respectively hinged with two groups of folding support frames 21. The first linkage rod 11 and the second linkage rod 12 are provided with universal shafts at the hinged positions, the universal shafts are of an upper-middle-lower three-section structure, the upper section is used for hinging the first linkage rod 11 with the stop block 13, the lower section is used for hinging the first linkage rod 11 with the folding support 21, and the middle section is used for fixing the universal shafts into the first linkage rod 11. Similarly, the universal shaft disposed on the second linkage rod 12 is also used to hinge the stopper 13 and the foldable support frame 21 into a whole.

As shown in fig. 1 and 2, on the telescopic platform 10, a non-slip mat 15 is further disposed on a side surface of one side of each of the first linkage rod 11 and the second linkage rod 12, which is opposite to the lifting portion 20, and the non-slip mat 15 provides effective friction force for products placed on the first linkage rod 11 and the second linkage rod 12, so that stability of the products placed on the telescopic platform 10 is ensured, the products are not easy to slip, and risk of the products slipping off from the foldable support 100 is reduced.

As shown in fig. 4-7, in order to provide four different expansion states that the lifting portion 20 of the foldable stand 100 of the present invention can be combined to form, the adjustment of the relative angle between the telescopic platform 10 and the table top and the change of the relative position height between the telescopic platform 10 and the table top are realized through the four different expansion states.

As shown in fig. 1 and 3, the lifting unit 20 of the foldable stand 100 provided by the present invention includes two sets of folding support frames 21 located at the left and right sides of the telescopic platform 10, the folding support frames 21 include a first support rod 211 and a second support rod 212 which are in a straight structure when folded, one end of the first support rod 211 is pivoted to the second support rod 212, the other end of the first support rod 211 is hinged to the front side of the telescopic platform 10, one end of the second support rod 212 is hinged to the rear side of the telescopic platform 10, the first support rod 211 and the second support rod 212 form a first triangular support structure 22 on the vertical surface with the telescopic platform 10 when unfolded, and the second support rod 212 is further provided with an extension rod 2121 extending towards one side of the telescopic platform 10 at the position of pivoting with the first support rod 211. Two groups of folding support frames 21 are arranged in the lifting part 20, and the two groups of folding support frames 21 are movably connected with the side surface of the telescopic platform 10. When the two groups of foldable support frames 21 are folded, as shown in fig. 3, they can be arranged at the bottom of the telescopic platform 10 side by side, and folded together with the telescopic platform 10 into a rectangular rod structure. Along with the expansion of the telescopic platform 10, the two sets of folding support frames 21 can be respectively opened, so that the telescopic platform 10 is supported by the two sets of folding support frames 21. The two sets of folding supports 21 in the lifting part 20 of the folding bracket 100 of the present invention have the same structure, and the folded state and the unfolded state are the same, and only one set of folding supports 21 is taken as an example for detailed description.

Specifically, the folding supporting frame 21 includes a first supporting rod 211 and a second supporting rod 212 pivotally connected to each other. The pivot joint of the first support rod 211 and the second support rod 212 is located in the middle of the second support rod 212, so that the end of the second support rod 212 away from the telescopic platform 10 at the pivot joint also has an extension rod 2121. As shown in fig. 3, when the first support rod 211 and the second support rod 212 are folded, the first support rod 211 is hinged to the front side of the telescopic platform 10, the second support rod 212 is hinged to the rear side of the telescopic platform 10, and the extension rod 2121 of the second support rod 212 is received in the first support rod 211, and a portion of the extension rod 2121 coincides with the first support rod 211 and is disposed at the bottom of the telescopic platform 10 in a straight-line structure.

Specifically, in order to ensure that the foldable support 21 is arranged in a straight shape when folded, the end of the first support rod 211 has a notch 2111 for the extension rod 2121 of the second support rod 212 to be inserted into. The notch 2111 is disposed at an end of the first supporting rod 211 and is located at a side of the first supporting rod 211 pivoted to the second supporting rod 212. The notch 2111 extends from the end of the first support rod 211 to the center of the first support rod 211 to the pivot of the first support rod 211 and the third support rod 213, so that the extension rod 2121 of the second support rod 212 can be completely inserted into the notch 2111. The notch 2111 of the first support rod 211 is disposed such that when the first support rod 211 and the second support rod 212 are folded, the extension rod 2121 of the second support rod 212 can be inserted into the notch 2111, thereby ensuring a partial area overlapping therebetween.

As shown in fig. 5, when the first support bar 211 and the second support bar 212 are unfolded, a certain angle is formed between the end of the first support bar 211 and the front side of the telescopic platform 10, a certain angle is formed between the end of the second support bar 212 and the rear side of the telescopic platform 10, and a first triangular support structure 22 in the vertical direction is formed among the first support bar 211, the second support bar 212 and the telescopic platform 10. In the unfolding structure shown in fig. 5, two ends of the first linkage rod 11 of the telescopic platform 10 are movably connected with the folding support frames 21 at two sides respectively, and two ends of the second linkage rod 12 are movably connected with the folding support frames 21 at two sides respectively. As shown in fig. 5, one end of the first support rod 211 is disposed on the table top to form one support point, and the extension rod 2121 of the second support rod 212 is disposed on the table top to form another support point, so that one set of the foldable support frames 21 forms two support points on one side of the telescopic platform 10, and the other set of the foldable support frames 21 forms another two support points on the other side of the telescopic platform 10. Four supporting points are formed on the table top by two groups of folding supporting frames 21 for fixing the telescopic platform 10 on the table top.

Further, the foldable support frame 21 further includes a third support rod 213 foldable with the first support rod 211, one end of the third support rod 213 is pivotally connected to the first support rod 211, and the first support rod 211 and the third support rod 213 form a second triangular support structure 23 with the extension rod 2121 on a vertical plane when unfolded. The third support bar 213 is arranged to change the relative angle formed between the telescopic platform 10 and the table top. In the unfolded configuration shown in fig. 6, the third support bar 213 is unfolded with respect to the first support bar 211 and then abuts against the extension bar 2121 of the second support bar 212, thereby forming a second triangular support structure 23. Two triangular support structures are simultaneously formed on a set of folding supports 21. One end of the first support rod 211 of the foldable support frame 21 is disposed on the desktop to form a support point, and the other end of the third support rod 213 is disposed on the desktop to form another support point, so that the angle formed between the telescopic platform 10 and the desktop is changed by two triangular support structures. The angle formed by the telescopic platform 10 and the desktop after the third supporting rod 213 is unfolded is larger than the angle formed by the telescopic platform 10 and the desktop when the third supporting rod 213 is not unfolded.

As shown in fig. 4, in order to ensure the stability of the second triangular support structure 23 formed by the third support rod 213 when the third support rod 213 is unfolded. An inclined surface 2122 is provided on the extension rod 2121 of the second support rod 212 to abut against the third support rod 213, and the third support rod 213 can abut against the inclined surface 2122 of the extension rod 2121. The inclined surface 2122 of the extension rod 2121 can abut against and be attached to the top surface of the third support rod 213, so that the contact area between the second support rod 212 and the third support rod 213 is larger when the two support rods abut against each other, the attachment effect is better, and the supporting force between the two support rods is more stable.

Specifically, for the utility model provides a when the foldable support 100 accomodates, the volume is more small and exquisite, as shown in fig. 2, this third bracing piece 213 is provided with first bending portion 2131 in the pin joint department with first bracing piece 211, and third bracing piece 213 is folded in the bottom of first bracing piece 211 through first bending portion 2131. When the third supporting rod 213 is folded, as shown in fig. 3, the first bending portion 2131 of the third supporting rod 213 is pivotally connected to the first supporting rod 211, and the bottom surface of the first supporting rod 211 is attached to the third supporting rod 213.

Further, the folding supporting frame 21 further includes a fourth supporting rod 214 pivotally connected to the end of the first supporting rod 211, and a pivotal connection between the fourth supporting rod 214 and the first supporting rod 211 is located at a hinge joint between the first supporting rod 211 and the telescopic platform 10. As shown in fig. 7, the fourth supporting rod 214 can not only change the relative angle between the telescopic platform 10 and the table top, but also cooperate with the third supporting rod 213 to increase the height between the whole telescopic platform 10 and the table top, as shown in fig. 4. The fourth supporting rod 214 is disposed at the hinge joint of the first supporting rod 211 and the telescopic platform 10, that is, the fourth supporting rod 214 is disposed at the front side of the telescopic platform 10, and the height of the whole telescopic platform 10 and the height of the desktop can be effectively raised by simultaneously unfolding the third supporting rod 213 and the fourth supporting rod 214. The distance between the product on the telescopic platform 10 and the desktop is increased, so that the functions of ventilation and air permeation are achieved, and the heat dissipation of the electronic product placed on the folding support 100 is facilitated.

Specifically, in order to facilitate the storage of the foldable stand 100, as shown in fig. 2, the fourth supporting rod 214 is further provided with a second bending portion 2141 at a pivot joint with the first supporting rod 211, and the fourth supporting rod 214 is folded at the bottom of the first supporting rod 211 by the second bending portion 2141. The second bending portion 2141 of the fourth supporting rod 214 is hinged to an end of the first supporting rod 211, and the fourth supporting rod 214 and the third supporting rod 213 are respectively located at two sides of the first supporting rod 211, and when folded, the third supporting rod 213 and the fourth supporting rod 214 are folded in opposite directions, so that the third supporting rod 213 and the fourth supporting rod 214 are arranged at the bottom of the first supporting rod 211 in parallel. Meanwhile, the length of the third support rod 213 and the length of the fourth support rod 214 are both smaller than the length of the first support rod 211, so as to avoid the mutual interference of the third support rod 213 and the fourth support rod 214 when being folded.

The utility model provides a when foldable support 100 uses, according to the size of the product of placing, at first rotate telescopic platform 10's first gangbar 11 and second gangbar 12 relatively, and then open telescopic platform 10. Then, the first support bar 211 and the second support bar 212 of the two folding supports 21 in the lifting part 20 under the telescopic platform 10 are unfolded to form the first triangular support structure 22, resulting in the unfolded state shown in fig. 5. Then, according to the use requirement of the screen of the placed product, the third support rod 213 of the folding support frame 21 is gradually unfolded to form a second triangular support structure 23, and the unfolded state shown in fig. 6 is obtained. Alternatively, the third support rod 213 may be folded and the fourth support rod 214 may be unfolded as required, so as to obtain the unfolded state shown in fig. 7. Alternatively, the third support bar 213 and the fourth support bar 214 may be unfolded simultaneously as required to obtain the unfolded state shown in fig. 1 and 4. The utility model provides a four kinds of different expansion states that can provide in foldable support 100 can realize the adjustment between four kinds of different angles, still can realize the adjustment between the co-altitude between telescopic platform 10 and the desktop. After the foldable support 100 is used up, the lifting part 20 is only required to be folded, and the two linkage rods on the telescopic platform 10 are folded to obtain a rectangular rod structure, as shown in fig. 3, which is convenient for the foldable support 100 to be stored and carried outside.

The utility model provides a folding support 100, which comprises a telescopic platform 10 and a lifting part 20, wherein the telescopic platform 10 is in a rod structure after being stored, two folding support frames 21 of the lifting part 20 are in a linear structure after being stored and are folded at the bottom of the telescopic platform 10, the support structure during storage is simple, the occupied space is small, and the whole folding support 100 can be conveniently stored and carried; meanwhile, the expansion platform 10 of the folding bracket 100 can adjust the expansion size according to the size of the placed product, is suitable for most of electronic products in the market, and improves the adaptability of the bracket; meanwhile, the folding support frame 21 of the lifting part 20 of the folding support 100 is provided with the extension rod 2121 on the second support rod 212, the relative angle between the telescopic platform 10 and the desktop can be changed by adding the extension rod 2121, so that the angle between the screen of the electronic product placed on the telescopic platform 10 and a user can be more suitable for the use angle of ergonomics, the comfort of the electronic product in use is improved, the circulation of air at the bottom of the electronic product can be improved when the folding support 100 is unfolded, the heat dissipation efficiency of the electronic product is enhanced, meanwhile, the telescopic platform 10 and the lifting part 20 are made of metal, the support strength is high, the structure is simple, and the weight is light.

The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. A folding bracket is characterized by comprising a telescopic platform for placing a product and a lifting part for arranging the telescopic platform on a desktop; the lift portion includes that two sets of being located the folding support frame of the telescopic platform left and right sides, folding support frame is first bracing piece and the second bracing piece that is a style of calligraphy structure when drawing in, the one end of first bracing piece with the pin joint of second bracing piece, the other end of first bracing piece with the front side of telescopic platform is articulated, the one end of second bracing piece with the rear side of telescopic platform is articulated, first bracing piece with when the second bracing piece expandes with telescopic platform forms first triangle bearing structure on vertical face, the second bracing piece with the pin joint department of first bracing piece still is provided with towards keeping away from the extension rod that telescopic platform one side extended.

2. The foldable stand of claim 1, further comprising a third support bar foldably connected to the first support bar, one end of the third support bar being pivotally connected to the first support bar, the first support bar and the third support bar forming a second triangular support structure with the extension bar in a vertical plane when unfolded.

3. The foldable stand of claim 2, wherein said third support bar is provided with a first bend at the pivot with said first support bar, and said third support bar is folded at the bottom of said first support bar by said first bend.

4. The foldable stand of claim 1, wherein said first support bar has notches at its ends for receiving the extension bar of said second support bar.

5. The foldable stand of claim 2, wherein said extension bar is provided with a ramp surface for abutting against said third support bar, said third support bar being adapted to abut against said ramp surface of said extension bar.

6. The foldable stand of claim 1, further comprising a fourth support bar pivotally connected to an end of said first support bar, wherein the pivot of said fourth support bar to said first support bar is located at the hinge of said first support bar to said telescoping platform.

7. The foldable stand of claim 6, wherein said fourth support bar further comprises a second bend at the pivot joint with said first support bar, and said fourth support bar is folded at the bottom of said first support bar by said second bend.

8. The foldable stand of any one of claims 1 to 7, wherein the telescopic platform comprises a first linkage rod and a second linkage rod which are arranged to cross each other and are pivotally connected at their middle portions, and the lifting portion movably connects an end portion of the first linkage rod with an end portion of the second linkage rod.

9. The foldable stand of claim 8, wherein the first linkage rod is provided with a third bending portion at the pivot, a first groove is provided on the third bending portion, the second linkage rod is provided with a fourth bending portion at the pivot, a second groove is provided on the fourth bending portion, and the first groove and the second groove are connected to each other, so that the side edge of the first linkage rod and the side edge of the second linkage rod are attached to each other when the first linkage rod and the second linkage rod are folded in a crossed manner.

10. The foldable stand of claim 8, wherein said telescopic platform further comprises a stop block hinged to an end of said first linkage rod and/or said second linkage rod, said stop block and said first support rod being hinged to two sides of said first linkage rod or said second linkage rod, respectively.