CN111365593A

CN111365593A - Folding support

Info

Publication number: CN111365593A
Application number: CN201911423849.9A
Authority: CN
Inventors: 戴依含; 那志刚
Original assignee: Lenovo Beijing Ltd
Current assignee: Lenovo Beijing Ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-07-03
Anticipated expiration: 2039-12-31
Also published as: CN111365593B

Abstract

The present disclosure provides a foldable stand, comprising: one end of the first support arm is provided with a transmission bearing, and the first support arm can synchronously rotate with the transmission bearing; one end of the second supporting arm is in bearing connection with the other end of the first supporting arm through a first bearing; the base is in bearing type connection with the other end of the second supporting arm through a second bearing, and the second supporting arm can rotate along with the second bearing; the transmission bearing is in transmission connection with the first bearing through a first transmission piece so as to drive the first bearing to rotate through the rotation of the transmission bearing and the transmission action of the first transmission piece; first bearing and second bearing pass through the transmission of second driving medium and connect to the transmission through first bearing moves the second bearing rotation through the drive belt of second driving medium, and then makes under the pivoted circumstances takes place for first support arm, and the rotation that the second support arm can follow first support arm rotates.

Description

Folding support

Technical Field

The present disclosure relates to a stand, and more particularly, to a foldable stand.

Background

Due to the application requirements, a longer support is needed in some occasions, the support is usually required to be disassembled into multiple sections during transportation or is stored in a shorter state in a storage mode for convenient transportation, and the support in a special shape, such as a bent shape, is more complicated to install after being disassembled, and the existing storage mode cannot meet the requirements; in some special occasions, the angle and position of the bracket also need to be properly adjusted, for example, the bracket of an electronic device (such as a projector), and the existing bracket can not meet the requirements of corresponding flexible operation and the like, and is inconvenient to package and portable to move.

Disclosure of Invention

In view of the above, the present disclosure provides a foldable stand to at least partially solve the above technical problems.

The disclosed embodiment provides a foldable support, wherein, include:

one end of the first support arm is provided with a transmission bearing, and the first support arm can synchronously rotate with the transmission bearing;

one end of the second supporting arm is in bearing connection with the other end of the first supporting arm through a first bearing;

the base is in bearing type connection with the other end of the second supporting arm through a second bearing, and the second supporting arm can rotate along with the second bearing;

the transmission bearing and the first bearing are in transmission connection through a first transmission piece, so that the first bearing is driven to rotate through the transmission action of the first transmission piece through the rotation of the transmission bearing; the first bearing and the second bearing are in transmission connection through a second transmission piece, the second bearing is driven to rotate through transmission of the first bearing through transmission of the second transmission piece, and therefore the second supporting arm can rotate along with rotation of the first supporting arm under the condition that the first supporting arm rotates.

In a further embodiment, the foldable support further comprises a third support arm, one end of the third support arm is connected with the end of the first support arm, where the transmission bearing is arranged, through at least one transmission gear, at least one of the at least one transmission gear and the transmission bearing is coaxially arranged and can rotate synchronously, so that when the third support arm rotates, the transmission gear rotates to drive the transmission bearing to rotate.

In a further embodiment, the number of the transmission gears is even, and when the third support arm is stressed to rotate in the forward direction, the transmission gear is driven to rotate and the transmission bearing is driven to rotate in the reverse direction, so that one end of the first support arm, including the transmission bearing, rotates in the reverse direction, and then the first transmission member, the first bearing, the second transmission member and the second bearing are sequentially transmitted to drive the second support arm to rotate in the forward direction, so that the foldable contraction structure is formed.

In a further embodiment, the first transmission member and/or the second transmission member is a conveyor belt, so as to realize synchronous transmission of bearings sleeved at two ends of the conveyor belt through the conveyor belt, and optionally, the conveyor belt comprises a toothed belt.

In a further embodiment, the first transmission member and/or the second transmission member are/is a chain, and correspondingly, the transmission bearing, the first bearing and/or the second bearing are/is provided with a toothed disc respectively, so that the chain drives the toothed disc to rotate by matching of the chain and the toothed disc, and the toothed disc is indirectly driven to rotate corresponding to the bearing.

In a further embodiment, the first support arm comprises a first structural member secured at one end to the drive bearing and at another end to the first bearing;

and/or the second support arm comprises a second structural part, one end of the second structural part is sleeved on the shaft of the first bearing, and the other end of the second structural part is fixed on the second bearing.

In a further embodiment, the first support arm comprises a housing, the first structural element and the first transmission piece are accommodated in the housing, and the first structural element and the first transmission piece are respectively located at two sides of the housing of the first support arm;

and/or the second support arm comprises a shell, the second structural part and the second transmission part are accommodated in the shell, and the second structural part and the second transmission part are respectively positioned on two sides of the shell of the second support arm.

In further embodiments, the first support arm and the second support arm are both arc-shaped structures.

In a further embodiment, the foldable stand further comprises: a motor configured to drive the drive bearing to rotate.

In a further embodiment, the first support arm includes a hollow portion for at least partially receiving the second support arm when one end of the hollow portion rotates along the first bearing.

In a further embodiment, the second support arm includes a hollow portion for at least partially receiving the first support arm when one end thereof rotates along the second bearing.

Linkage between two support arms has been realized through these two driving mediums of first driving medium and second driving medium of this disclosure. In actual operation, as long as external force is applied to one of the supporting arms, the two supporting arms can rotate, and the purpose of integral storage is achieved.

Drawings

Fig. 1 is a schematic view of a folding stand in a storage state according to an embodiment of the disclosure.

Fig. 2 is a schematic view of an unfolded state of a folding stand according to an embodiment of the disclosure.

Fig. 3 is an enlarged schematic view of a portion a in fig. 2.

Fig. 4 is an enlarged schematic view of a portion B in fig. 2.

Fig. 5 is an enlarged schematic view of a portion C in fig. 2.

Fig. 6 is an exploded view of a folding bracket according to an embodiment of the disclosure.

Detailed Description

The use of ordinal numbers such as "first," "second," etc., in the present disclosure to modify a claimed element, region (e.g., a first support arm, a first transmission member, a first structural element, or a first bearing) does not by itself connote or represent any preceding ordinal number for that element, region, or method of manufacture, but rather denote the presence of a particular element or region with a certain name or sequence number.

The technical solution of the present disclosure is further specifically described below by way of examples with reference to the accompanying drawings. In the specification, the same or similar reference numerals denote the same or similar components. The following description of the embodiments of the present disclosure with reference to the accompanying drawings is intended to explain the general inventive concept of the present disclosure and should not be construed as limiting the present disclosure.

In the description of the present disclosure, references to "some embodiments" mean that a particular feature, structure, or parameter described in the embodiment is included in at least one embodiment in accordance with the present disclosure. Those of skill in the art will understand that the particular features, structures or parameters, steps, etc., disclosed in one or more embodiments of the disclosure and in the alternative can be combined in any suitable manner.

Hereinafter, some examples will be provided to explain embodiments of the present disclosure in detail. The advantages and efficacy of the present disclosure will become more apparent from the following disclosure. The drawings accompanying this description are simplified and are for illustration purposes. The number, shape, and size of the components shown in the drawings may be modified depending on the actual situation, and the arrangement of the components may be more complicated. Other aspects of practice or use can be made in the present disclosure, and various changes and modifications can be made without departing from the spirit and scope defined in the present disclosure. Directional phrases used in the embodiments, such as "upper," "lower," "front," "rear," "left," "right," "inner," "outer," and the like, refer only to the orientation of the figures and are not intended to limit the scope of the present disclosure.

Fig. 1 is a schematic view of a folding stand in a storage state according to an embodiment of the disclosure. Fig. 2 is a schematic view of an unfolded state of a foldable stand according to an embodiment of the disclosure. Fig. 3 is an enlarged schematic view of a portion a in fig. 2. Fig. 4 is an enlarged schematic view of a portion B in fig. 2. Fig. 5 is an enlarged schematic view of a portion C in fig. 2. Fig. 6 is an exploded view of a folding bracket according to an embodiment of the disclosure. Referring to fig. 1-6, the foldable stand according to the embodiment of the present disclosure includes two support arms and a base, and two transmission members are used to realize linkage between the two support arms. In actual operation, as long as external force is applied to one of the supporting arms, the two supporting arms can rotate, and the purpose of integral storage is achieved.

The first support arm 110 has two ends, and a transmission bearing 131 is disposed at one end (upper end, hereinafter referred to as a first end) thereof, and the transmission bearing 131 may be disposed in a manner that an opening is formed at one side of the upper end, and the transmission bearing 131 may be inserted into the opening. The drive bearing 131 may rotate itself (e.g., by an external force acting directly on the drive bearing), or the force may be transmitted to the drive bearing through a power transmission device (e.g., a gear, etc.). As shown in fig. 3, the first support arm 110 rotates coaxially with the transmission bearing 131, which can transmit a rotational power through engagement of several gears. Optionally, a motor may be connected to one side of the transmission bearing 131, and the motor may drive the transmission bearing 131 under a power-on condition, so that the rotation of the transmission bearing 131 can also be realized.

The other end (lower end, hereinafter referred to as the second end) of the first support arm 110 is connected to one end (upper end) of the second support arm 120, the connection means is a first bearing 132, and the first bearing 132 realizes a bearing type connection between the first support arm 110 and the second support arm 120, specifically, one end of the first bearing 132 is fixed to one side of the second end of the first support arm 110, the side may be formed by one first structural member 115, and one end of the first bearing is fixed to one end of the corresponding first structural member 115.

In some embodiments, the second supporting arm 120 can also rotate around the first bearing 132, the rotation angle can be 0 ° to 360 °, the width of the upper end of the second supporting arm 120 can be smaller than the width of the lower end of the first supporting arm 110, the first bearing 132 can pass through the openings on both sides of the upper end of the second supporting arm 120, that is, the width of the upper end of the second supporting arm 120 can be reduced, so as to embed the upper end of the second supporting arm 120 in the second end of the first supporting arm 110, and the specific structure can be referred to the structure shown in fig. 4; the second support arm 120 is free to rotate about the first bearing 132.

The other end (lower end) of the second supporting arm 120 is connected to the base 140, and similarly, the second bearing 133 is used to realize the bearing connection between the second supporting arm 120 and the base 140, specifically, one end of the second bearing 133 may be fixed to one side of the lower end of the second supporting arm 120, and the side may be formed by one structural member 125, and correspondingly, one end of the second structural member 125 is fixed to one end of the second bearing 133.

Optionally, the lower end of the second supporting arm 120 can rotate with the second bearing 133, and the second supporting arm rotates around the base 140 during the rotation process, and the rotation angle can be 0-360 °. The base 140 serves a core support effect, and is generally placed or fixed on a plane such as the ground or a table top, as a force bearing component of the support as a whole, which adopts a stable structure, and has relatively heavy weight,

the transmission bearing 131 and the first bearing 132 are in transmission connection through a first transmission piece 151, that is, the rotation of the transmission bearing 131 can be transmitted to the first bearing 132 through the first transmission piece 151, so that the first bearing also rotates, the rotation of the transmission bearing 131 is transmitted through the first transmission piece 151 to drive the first bearing 132 to rotate, and the first support arm 110 can rotate along with the transmission bearing 131 when rotating; further, the first bearing 132 and the second bearing 133 are connected through a second transmission member 152 in a transmission manner, and according to a similar principle, the transmission of the first bearing 132 drives the second bearing 133 to rotate through the transmission of the second transmission member 152, so that the second support arm 120 can rotate along with the rotation of the first support arm 110 under the condition that the first support arm 110 rotates through the two-stage transmission, that is, the follow-up is realized.

In some embodiments, the specific choices of the first transmission member 151 and the second transmission member 152 may be respectively selected from conveyor belts, so as to realize synchronous transmission of bearings sleeved at two ends of the conveyor belts through the conveyor belts; the conveyor belt is a typical transmission member, and can realize transmission at a linear speed of 1: 1, that is, synchronous transmission can be realized, specifically, the first transmission member 151 selected as the conveyor belt can be simultaneously sleeved on the outer ring of the transmission bearing 131 and the first outer ring of the first bearing 132, and the second transmission member 152 selected as the conveyor belt can be simultaneously sleeved on the second outer ring of the first bearing 132 (different from the sleeved position of the first transmission member 151) and the outer ring of the second bearing 133; in addition, optionally, the conveyor belt includes a toothed belt, and the toothed belt is used as a conveying member, for example, the toothed belt is used as a conveying member, and the toothed belt is used as a configuration with a high friction force, which can ensure that the two bearings can rotate synchronously.

In some embodiments, the first transmission member 151 and the second transmission member 152 may also be a chain, and accordingly, the transmission bearing 131, the first bearing 132 and/or the second bearing 133 are respectively provided with a toothed disc, so that the chain drives the toothed disc to rotate through cooperation of the chain and the toothed disc, and indirectly drives the toothed disc to rotate corresponding to the bearing.

Of course, the above two modes can also be used in combination, for example, the first transmission member 151 is a transmission belt, the second transmission member 152 is a chain, the outer ring of the transmission bearing 131 and the first outer ring of the second bearing 132 are smooth surfaces, and the second outer ring of the first bearing 132 and the outer ring of the second bearing 133 are toothed discs.

Through the above components, the linkage of the first support arm 110 and the second support arm 120 can be realized, the contraction elasticity is improved, the folding and position contraction or compensation are simultaneously considered, firstly, the transmission bearing 131 starts to rotate, the first transmission piece 151 transmits the transmission bearing 131 to the first bearing 132, the first bearing 132 is in transmission connection with the second transmission piece 152 of the second bearing 133, and then the second bearing 132 rotates through the transmission of the first bearing 132 and the transmission of the second transmission piece 152, so that under the condition that the first support arm 110 rotates, the second support arm 120 can also rotate along with the rotation of the first support arm 110, and the follow-up is realized. And through the cooperation of the above-mentioned transmission components and bearings, the step jamming problem caused when the first support arm 110 is folded can be avoided, in order to ensure the support stability, usually the first support arm 110 needs to be kept stable through a step or a concave structure, when the first support arm 110 rotates, the corresponding second support arm 120 also rotates, the joint where the two support arms are connected is unfolded, the first support arm 110 can be separated from the joint where the two support arms are connected, and the step jamming problem caused when the third support arm 140 passes through the step or the concave structure can be avoided.

In order to guarantee that the supporting function and the conduction rotation function are implemented simultaneously, the arrangement mode of the two supporting arms can be that a structural part is arranged on one side, a bearing and a transmission part are arranged on the other side, and an implementable mode is as follows: the first support arm 110 includes a first structural member 115, one end (upper end) of the first structural member 115 is fixed to one side of the transmission bearing 131, and the other end is fixed to the first bearing 132; further optionally, the second supporting arm 120 includes a second structural member 125, one end of the second structural member 125 is sleeved on the shaft of the first bearing 13, and the other end is fixed to the second bearing 133.

In some embodiments, the first support arm 110 and the second support arm 120 are provided with a housing, as shown in fig. 6, the first support arm 110 includes a first support arm upper shell 116 and a first support arm lower shell 117, and the second support arm 120 includes a second support arm upper shell 126 and a second support arm lower shell 127, and the housing functions to bring the support arm into overall motion and protect the internal structure. Optionally, the shells of the two support arms are curved, the radii of curvature of the shells are the same or substantially the same, and the arrangement can realize the attachment of the side surfaces of the two support arms, and can also be curved when being unfolded, so as to adapt to specific requirements (for example, supporting electronic equipment such as a projector).

Optionally, as shown in fig. 6, the housing of the first support arm 110 (including the first support arm upper shell 116 and the first support arm lower shell 117) includes a hollow portion, so that the hollow portion at least partially receives the second support arm 120 when one end of the hollow portion rotates along the first bearing 132. Obviously, this arrangement can further reduce the storage space, and this effect is clearly seen in fig. 1. Similarly, the second supporting arm 120 may also include a hollow portion, so that the hollow portion at least partially accommodates the first supporting arm 110 when one end of the hollow portion rotates along the second bearing 133, the arrangement manner is similar to that described above, and the space-saving accommodation can still be achieved when the rotation direction is opposite.

Optionally, the matching mode of the housing and the structural member in each support arm may be as follows: the first support arm 110 comprises a housing, the housing of the first support arm 110 accommodates the first structural member 115 and the first transmission piece 151, and the first structural member 115 and the first transmission piece 151 are respectively located at two side ends of the housing of the first support arm 110; the second support arm 120 includes a housing, and the second structural member 125 and the second transmission member 152 are accommodated inside the housing, and the second structural member 125 and the second transmission member 152 are respectively located at two sides of the housing of the second support arm 120.

In some embodiments, a bracket member may be provided on the first support arm 110 for hanging objects, including but not limited to clothing, electronic equipment, household chemical products, or industrial products. The support member may be a hook, a magnetic object, an adhesive member, or a rivet member, and is used for illustration only, and the embodiments of the present disclosure are not limited thereto. When the hanging object is an electronic device, such as a power supply or other wires (e.g., a network wire) after hanging, the corresponding wires can be led from the base 140, and then pass through the second support arm 120 and the first support arm 110 in turn to access the electronic device, so that several risks and inconveniences caused by threading from the outside can be avoided.

In order to further increase the overall length of the foldable stand or reduce the occupied space after being stored, referring to fig. 1-6, the foldable stand may further include a third supporting arm 160, and the third supporting arm 160 may be matched with the first supporting arm 110, and the third supporting arm 160 may be further unfolded based on the extension of the first supporting arm 110, so as to increase the overall length of the stand. The first support arm 110 and the second support arm 160 are connected by a connecting member, which may be a plurality of transmission gears 134. At least one of the at least one driving gear 1341 of the plurality of driving gears 1344 is coaxially disposed with the driving bearing 131 and can synchronously rotate, so that when the third supporting arm 160 rotates, the driving bearing 131 is further driven to rotate by the rotation of the driving gear 1341.

As shown in fig. 3 and 6, one end (e.g., a lower end) of the third support arm is connected to the end (e.g., an upper end, i.e., a first end) of the first support arm 110 where the transmission bearing 131 is disposed, through at least one transmission gear 134, and the gears are engaged with each other, optionally, the outer diameters and the numbers of teeth of the gears are the same, so as to realize synchronous 1: 1 rotation.

In the plurality of gears, one of the transmission gears 1344 and the second support arm 160 can follow up, and the implementation manner can be various, and the embodiment of the present disclosure only exemplifies one implementation manner, where a fixed shaft 135 passes through the transmission gear 1344 and is fixed on the axis of the gear (i.e., the transmission gear 1344 and the fixed shaft 135 rotate synchronously), two ends of the fixed shaft 135 are respectively connected to a bracket 162, the bracket is disposed in the third support arm 160, and the rotation of the bracket 162 can drive the third support arm 160 to rotate integrally, i.e., realize following up. Of course, the opposite conduction can also be realized, that is, an external force is applied to the third support arm 160, and the external force can be transmitted to the fixed shaft 135 through the bracket 162, and the fixed shaft 135 drives the transmission gear 1344 to be transmitted to the transmission bearing 131 through the transmission of the gear 144, so as to realize the linkage conduction described in the above embodiment. The third support arm 160 can also rotate around the fixed shaft 135 by an angle of 0-360 deg.. Through the gear steering, and the corresponding gear precision meshing design is guaranteed to be tightly matched with the transmission part, so that the folding support can be accurately and simply stored.

In some embodiments, the number of the transmission gears 134 is even, and since the rotation directions of the transmission gears 134 are opposite after the transmission through the even number of the transmission gears 134, as shown in fig. 3, the number of the transmission gears 134 is even, the transmission gears 1341, 1342, 1343 and 1344 are respectively engaged with each other in the directions from the first support arm 110 to the third support arm 160, the transmission gear 1341 and the transmission bearing 131 are coaxially arranged, the two can synchronously rotate, and the rotation angular speeds are the same.

When the third support arm in fig. 3 is subjected to a downward force, the downward force is reflected on the third support arm, that is, the third support arm is subjected to forward rotation, and drives the transmission gear 1344 to rotate, and then the

transmission gear

1343, 1342 and 1341 are used for transmission (the rotation direction is changed after each transmission), and finally the transmission bearing 131 is driven to rotate reversely, so that the end of the first support arm 110, where the transmission bearing 131 is arranged, can rotate reversely, and then the first transmission member 151, the first bearing 132, the second transmission member 152 and the second bearing 133 are sequentially transmitted to drive the second support arm 120 to rotate forward, so as to form a folding type contraction structure, and the final contraction result is as shown in fig. 1.

Optionally, the third support arm 160 further includes two gear clamping plates 163, where the two gear clamping plates 163 are disposed on two sides of the plurality of transmission gears 134, and holes may be formed in the gear clamping plates 163, and the transmission gears may be fixed on the holes; at a position corresponding to the driving gear 1344, the gear clamp 163 is provided with a through hole for the fixed shaft 135 to pass through.

In some embodiments, the third support arm 160 is provided with a housing, as shown in fig. 6, and the third support arm 160 includes a third support arm upper shell 166 and a third support arm lower shell 167. Optionally, the housing of the third support arm 160 and the first support arm 110 are curved, and have the same or substantially the same radius of curvature, and the arrangement may be curved when deployed to suit particular needs (e.g., to support electronic devices such as projectors). Optionally, the third support arm has an overall housing size larger than the first and second support arms to allow more room for accommodating objects to be hung.

In some embodiments, a bracket member may be provided on the third support arm 160 for hanging objects, including but not limited to clothing, electronic equipment, household goods, or industrial goods. The support member may be a hook, a magnetic object, an adhesive member, or a rivet member, and is used for illustration only, and the embodiments of the present disclosure are not limited thereto. When the hanging object is an electronic device, such as a power supply or other wires (e.g., a network wire) after hanging, the corresponding wires can be led from the base 140, and the electronic device can be connected after passing through the inside of the second support arm 120, the first support arm 110 and the third support arm 160 in turn, so that several risks and inconveniences caused by threading from the outside can be avoided.

Optionally, as shown in fig. 6, the housing of the first support arm 110 (including the first support arm upper shell 116 and the first support arm lower shell 117) includes a hollow portion, so that the hollow portion at least partially receives the third support arm 160 when one end of the hollow portion rotates along the first bearing 132.

In some embodiments, at least some of the components of the first support arm 110, the second support arm 120, the third support arm 160, and the rack base 140, or some of the components of at least some of the components, are made of aluminum alloy, magnesium alloy, or aluminum magnesium alloy, which can ensure the strength of the rack product and facilitate handling and transportation.

The foldable support of this disclosure embodiment has been introduced above, has realized the linkage between first support arm and second support arm through setting up two driving mediums of first driving medium and second driving medium, avoids first support arm to cross the dead or card pause problem of step card. In actual operation, only one of the supporting arms is applied with external force, the two supporting arms can rotate, and the purpose of integral storage is achieved; by arranging the transmission bearing, power can be transmitted to the first bearing and the second bearing, and the integral support is folded; by arranging the third supporting arm, the overall extension length of the support can be increased or the occupied space after the support is stored can be reduced; through set up fretwork portion on first supporting arm, can further save and receive the space, make things convenient for the transportation of support. By arranging the structural part, the supporting function and the conduction rotation function of the supporting arm can be ensured to be simultaneously implemented; the transmission bearing is connected to the motor, so that the motor can drive the transmission bearing under the condition of electrification, and therefore the support frame is automatically stored.

The above-mentioned embodiments are intended to illustrate the objects, technical solutions and effects of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only illustrative of the present invention and are not intended to limit the present invention, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A foldable stand, comprising:

the transmission bearing and the first bearing are in transmission connection through a first transmission piece, so that the first bearing is driven to rotate through the transmission action of the first transmission piece through the rotation of the transmission bearing; the first bearing and the second bearing are connected through transmission of a second transmission piece, so that the second bearing is driven to rotate through transmission of the first bearing and transmission of the second transmission piece, and therefore the first supporting arm can rotate along with rotation of the first supporting arm.

2. The foldable stand of claim 1, further comprising a third support arm, wherein one end of the third support arm is connected to the end of the first support arm where the driving bearing is disposed through at least one transmission gear, and at least one of the at least one transmission gear is disposed coaxially with the driving bearing and can rotate synchronously, so that when the third support arm rotates, the transmission gear rotates to drive the driving bearing to rotate.

3. The foldable support according to claim 2, wherein the number of the transmission gears is even, and when the third support arm is forced to rotate in the forward direction, the transmission gear is driven to rotate and the transmission bearing is driven to rotate in the reverse direction, so that one end of the first support arm including the transmission bearing rotates in the reverse direction, and then the first transmission member, the first bearing, the second transmission member and the second bearing are sequentially driven to drive the second support arm to rotate in the forward direction, thereby forming the foldable structure.

4. A foldable stand according to claim 1, wherein the first and/or second transmission members are belts to effect synchronous transmission of bearings journaled at both ends of the belts, optionally the belts comprising toothed belts.

5. The foldable stand of claim 1, wherein the first transmission member and/or the second transmission member are each a chain, and accordingly, the transmission bearing, the first bearing and/or the second bearing are each provided with a toothed disc, so that the chain drives the toothed disc to rotate through cooperation of the chain and the toothed disc, and indirectly drives the corresponding bearings of the toothed disc to rotate.

6. The folding bracket of claim 1, wherein said first support arm comprises a first structural member secured at one end to said drive bearing and at another end to said first bearing;

7. The folding rack of claim 6, wherein the first support arm includes a housing that houses the first structural member and the first transmission member therein, and the first structural member and the first transmission member are respectively located on both sides of the housing of the first support arm;

8. The folding bracket of claim 1, wherein said first support arm and said second support arm are each arc-shaped structures.

9. The folding bracket of claim 1, further comprising:

a motor configured to drive the drive bearing to rotate.

10. The folding bracket of claim 1, wherein said first support arm includes a cutout to at least partially receive said second support arm when one end of said cutout is rotated along said first bearing.

11. The folding bracket of claim 1 wherein said second support arm includes a cutout to at least partially receive said first support arm when one end thereof is rotated along said second bearing.