CN217540241U

CN217540241U - Multi-point control foldable support

Info

Publication number: CN217540241U
Application number: CN202220489073.1U
Authority: CN
Inventors: 谭红春
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-03-08
Filing date: 2022-03-08
Publication date: 2022-10-04
Anticipated expiration: 2032-03-08

Abstract

The utility model discloses a multiple spot control's foldable support, it includes: the device comprises a first plate body, a second plate body, a support rod and a position retaining mechanism, wherein the first plate body and the second plate body are hinged through edges. Wherein, position holding mechanism set up in first plate body with the slide for after changing the contained angle between second plate body and the first plate body, the contained angle after the change is kept automatically, and it includes: the sliding plate comprises a rack extending along a sliding path of the sliding plate, an engaging member with a plurality of tooth parts and an elastic member acting on the engaging member and pressing the engaging member towards the rack, wherein the plurality of tooth parts of the engaging member are engaged with different tooth positions of the same tooth surface of the rack. The utility model discloses a rack, meshing piece and elastic component cooperation, rack and meshing piece multiple spot meshing realize that the automation of relative position keeps between two plate bodys of folding support, have the advantage that the reliability is high.

Description

Multi-point control foldable support

Technical Field

The invention relates to a foldable support, in particular to a multi-point control foldable support formed by hinging two plate bodies.

Background

Some existing foldable racks include: a first plate body; the second plate body is stacked with the first plate body, and one edge of the second plate body is hinged with the first plate body, so that the second plate body can rotate to form a certain included angle with the first plate body; one end of the support rod is hinged with the second plate body, and the other end of the support rod is hinged with a sliding block which is arranged on the first plate body in a sliding manner; and the position holding mechanism is used for automatically holding the changed included angle after the included angle between the second plate body and the first plate body is changed.

When the support is used, the two plate bodies rotate relatively around the hinge parts and are unfolded to form a certain angle, one plate body is supported on the table board, supported equipment, such as a mobile phone, a tablet personal computer, a notebook computer and the like, is placed on the other plate body to form support for the supported equipment, the angle of the supported equipment towards a user can be flexibly adjusted by adjusting the angle between the two plate bodies, and the support is very convenient to use.

However, such stents have the following drawbacks: the position holding mechanism adopts a friction block, and utilizes the pretightening friction force formed between the friction block and a bracket body, such as the bracket disclosed in CN215072519U, the reliability of the position holding mechanism is poor, and especially, the reliability is worse and worse after the friction block is worn or aged along with the increase of the service time.

Disclosure of Invention

It is an object of the present invention to provide a multi-point controlled foldable stand that addresses, at least to some extent, the above-mentioned deficiencies of the related art.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

a multi-point controlled foldable stand, comprising:

a first plate body;

the second plate body is stacked with the first plate body, and one edge of the second plate body is hinged with the first plate body, so that the second plate body can rotate to form a certain included angle with the first plate body;

one end of the support rod is hinged with the second plate body, and the other end of the support rod is hinged with a sliding plate which is arranged on the first plate body in a sliding manner; the position maintaining mechanism is arranged on the first plate body and the sliding plate and is used for automatically maintaining the changed included angle after the included angle between the second plate body and the first plate body is changed; the position holding mechanism includes:

a rack extending along a sliding path of the slide plate;

the meshing part is provided with a plurality of tooth parts which are meshed with different tooth positions of the same tooth surface of the rack; and the elastic piece acts on the meshing piece and extrudes the meshing piece towards the rack.

Preferably, the rack is a double-sided rack, two tooth surfaces of the double-sided rack are respectively meshed with one meshing part, and the two meshing parts are arranged in a mirror image mode relative to the rack.

In some embodiments, the engagement member includes a block, the plurality of teeth of the engagement member being formed on a face of the block; the elastic piece is a spring, and the spring is abutted against the back of the block body.

In some embodiments, the rack is fixed to the slide plate, and the block of the engaging member is slidably engaged with the first plate in a direction approaching or departing from the rack.

In other embodiments, the engaging member and the elastic member are the same elastic piece, two end portions of the elastic piece are respectively arched towards the tooth surface of the rack to form a plurality of tooth portions of the engaging member, and a middle portion of the elastic piece is arched towards a direction away from the tooth surface to form the elastic member. In some embodiments, the rack is fixed to the sliding plate, and the elastic piece is mounted to the first plate. In some embodiments, the rack is fixed to the first plate, and the elastic piece is mounted to the sliding plate.

In still other embodiments, the slide plate comprises: an upper plate; and a lower plate opposite to the upper plate and connected to the upper plate through a plurality of columns; the elastic sheet is arranged between the upper plate and the lower plate, and the arched outer side in the middle of the elastic sheet is abutted to the cylinder.

Preferably, the first plate body or the second plate body is provided with an accommodating cavity corresponding to the position of the stay bar, and the stay bar is accommodated in the accommodating cavity when the support is folded.

Preferably, the end of the stay bar hinged to the second plate has an extension which is turned to protrude from a lower-middle position of the upper surface of the second plate when the stand is changed from the folded state to the unfolded state, so that the second plate constitutes a support part engaged with the back of the supported device and the extension constitutes a support part engaged with the bottom of the supported device.

Preferably, the rack is a double-sided rack, each tooth position of one tooth surface of the double-sided rack is in a circular arc structure, one of two edges of each tooth position of the other tooth surface of the double-sided rack is flat, the other edge of each tooth position of the other tooth surface of the double-sided rack is steep, the back of the meshing piece corresponding to the other tooth surface is provided with an operating rod, and the operating rod extends outwards and is exposed out of the edge of the first plate body.

Compared with the prior art, the invention has at least the following beneficial effects:

the rack, the meshing part and the elastic part are matched, and the rack is meshed with the meshing part at multiple points, so that the relative position between the two plate bodies of the folding support can be automatically maintained, and the folding support has the advantage of high reliability.

Drawings

FIG. 1 is a perspective view of a stent of a first embodiment in a deployed state;

FIG. 2 is a schematic view thereof in a folded state;

FIG. 3 is a side view thereof;

FIG. 4 isbase:Sub>A cross-sectional view A-A of FIG. 3;

FIG. 5 is an enlarged view of portion B of FIG. 4;

FIG. 6 is a schematic view of the engagement member;

FIG. 7 is a perspective view of the stent of the second embodiment in a deployed state;

FIG. 8 is a perspective view of the stand of the second embodiment in a folded condition;

FIG. 9 is a perspective view of the third embodiment stent in a deployed state;

FIG. 10 is a side view of a third embodiment bracket;

FIG. 11 is a cross-sectional view C-C of FIG. 10;

FIG. 12 is a schematic view of the engaging member and the elastic member;

FIG. 13 is a perspective view of the fourth embodiment stent in a deployed state;

FIG. 14 is a side view of a fourth embodiment bracket;

FIG. 15 is a cross-sectional view D-D of FIG. 14;

FIG. 16 is an enlarged view of section F of FIG. 15;

FIG. 17 is a perspective view of a fifth embodiment stent in an expanded state;

FIG. 18 is a schematic view of a sled and engagement members thereon;

FIG. 19 is a side view of a fifth embodiment bracket;

FIG. 20 is a cross-sectional view E-E of FIG. 19;

FIG. 21 is a schematic view of the engaging member and the elastic member;

reference numerals are as follows:

10. a second plate body; 11. an accommodating cavity; 12. an anti-slip layer;

20. a stay bar; 21. an extension;

30. a slide plate; 31. an upper plate; 32. a cylinder; 33. a lower plate;

40. a first plate body; 41. a support;

50. a position holding mechanism; 51. a rack; 511. an edge; 512. the other edge; 52. an engaging member; 521. a tooth portion; 522. a block body; 53. an elastic member; 54. an operating lever.

Detailed Description

The invention is further illustrated with reference to the following figures and examples.

The first embodiment:

referring to fig. 1-3, the foldable stand comprises: a first plate 40, a second plate 10, a brace 20, a slide plate 30, and a position holding mechanism 50.

The first board 40 is adapted to mate with a table top and the second board 10 is adapted to mate with a supported device, which may be a tablet computer, a laptop computer, or the like. The first plate body 40 and the second plate body 10 are provided with hollow structures, and the hollow structures reduce the overall weight of the bracket.

The left edge (in fig. 3) of the second board 10 is hinged to the first board 40, and the angle between the second board 10 and the first board 40 can be changed by rotating the second board 10 around the hinged portion.

Two upward protrusions are fixed to the left end of the first board body 40, and when the supported device is placed on the second board body 10, the protrusions are engaged with the bottom of the supported device, thereby preventing the supported device in an inclined state from sliding leftward.

The stay bar 20 is hinged to the second plate 10 on one hand and to the slide plate 30 on the other hand, and the slide plate 30 is slidably engaged with the first plate 40 and can slide in the left-right direction in fig. 3. The stay bar 20 is a U-shaped structure, so that the support is more stable.

The position maintaining mechanism 50 is disposed on the first board body 40 and the sliding board 30, and is used for automatically maintaining the changed included angle after changing the included angle between the second board body 10 and the first board body 40.

Referring to fig. 3 to 5, the position holding mechanism 50 includes: rack 51, engaging member 52 and elastic member 53.

The rack 51 is integrally formed with the slider 30, but is not limited thereto, and may be manufactured independently of each other, and then the rack 51 is fixed to the slider 30 by a fixing means, for example, by screwing, welding, snapping, riveting, or the like. The rack 51 extends along the sliding path of the slide 30.

The rack 51 is a double-sided rack and comprises two tooth surfaces, each tooth surface is meshed with one meshing part 52, and the two meshing parts 52 are arranged in a mirror image mode relative to the rack 51. With this structure, the two engaging members 52 press the rack 51 from both tooth surfaces of the rack 51, and the folding operation or the unfolding operation of the present stand is made smoother by the forces applied to both sides of the rack 51 as compared with the force applied to one side. However, the present invention is not limited to this, and the position holding mechanism 50 may be constructed by engaging a single-sided rack with an engaging member 52.

Referring to fig. 6, the engaging member 52 includes a block 522 and a plurality of teeth 521 formed on a surface of the block 522.

Referring to fig. 5 and 6, the block 522 of the engaging member 52 is slidably engaged with the seat 41 of the first plate 40, and can slide in a direction approaching or moving away from the rack 51. The elastic member 53 is a spring, and the spring abuts against the back of the block 522 to press the engaging member 52 against the rack 51. A positioning projection to which the spring is attached is also provided on the back of the engaging member 52. The plurality of teeth 521 on the surface of the engaging member 52 are engaged with different tooth positions on the same tooth surface of the rack 51.

The plurality of tooth portions 521 of the engaging member 52 are engaged with different tooth positions of the same tooth surface of the rack 51 under the elastic force of the spring, so as to limit the rack 51 and keep the rack 51 at the current position, thereby automatically keeping the current included angle between the second plate 10 and the first plate 40. When a torsional force is applied to the stand, and the first plate body 40 and the second plate body 10 are relatively rotated according to the folding direction or the unfolding direction of the stand, the torsional force is transmitted to the sliding plate 30, the sliding plate 30 and the rack 51 overcome the resistance of the engaging piece 52 to slide, after the torsional force is released, the elastic force of the spring enables the engaging piece 52 to reset, the rack 51 is limited, and the second plate body 10 and the first plate body 40 are automatically kept at the rotated positions.

It can be seen that, after the position retaining mechanism 50 is relatively rotated according to the folding direction or the unfolding direction of the bracket, the angle of the rotated position can be automatically maintained without manually operating the stay bar 20, which is very convenient for use. The position holding mechanism 50 is realized by a rack 51, an engaging member 52 with a plurality of tooth parts 521 and a spring, on one hand, the rack 51 and the engaging member 52 are not easy to wear, and the position holding function is not influenced even if the rack 51 and the engaging member 52 are worn, on the other hand, the engaging member 52 has a plurality of tooth parts 521, and the engaging member is matched with different tooth positions of the same tooth surface of the rack 51 to realize positioning, so that multi-point control is formed, and the support has the characteristic of high reliability.

Fig. 2 shows the stand in a folded state. The second plate body 10 is provided with a containing cavity 11 corresponding to the position of the stay bar 20, and the stay bar 20 is contained in the containing cavity 11 when the support is folded. Therefore, under the condition that the support is folded, the whole thickness is reduced, and the thinning is realized.

In addition, the anti-slip layer 12 is disposed on the upper surface of the second board body 10, i.e., the surface far away from the first board body 40, at four corners, respectively, so as to increase the friction force with the supported device. The non-slip layer 12 is preferably, but not limited to, a silicone sheet, a soft rubber sheet, or the like.

Second embodiment:

referring to fig. 7 to 8, the foldable stand of the second embodiment includes: the first plate body 40, the second plate body 10, the stay bar 20, the sliding plate 30 and the position holding mechanism 50.

The first board 40 is adapted to cooperate with a table top, and the second board 10 is adapted to cooperate with a supported device, which may be a tablet computer, a laptop computer, or the like. The first plate body 40 and the second plate body 10 are provided with hollow structures, and the hollow structures reduce the overall weight of the bracket.

One edge of the second plate 10 is hinged to the first plate 40, and the angle between the second plate 10 and the first plate 40 can be changed by rotating the second plate 10 around the hinged portion.

The stay bar 20 is hinged to the second plate 10 on one hand and the slide plate 30 on the other hand, and the slide plate 30 is slidably engaged with the first plate 40 in a left-front-to-right-rear direction or a right-rear-to-left-front direction in fig. 7. The stay bar 20 is a U-shaped structure, so that the support is more stable.

Wherein, the end of the stay bar 20 hinged with the second plate body 10 is provided with an extension part 21, when the bracket is changed from a folding state (see fig. 8) to an unfolding state (see fig. 7), the extension part 21 is turned to protrude from the middle lower position of the upper surface of the second plate body 10, so that the second plate body 10 forms a supporting part matched with the back of the supported equipment, and the extension part 21 forms a supporting part matched with the bottom of the supported equipment. Thereby, the supported device can be supported from the bottom and the back of the supported device. Furthermore, the extension part 21 is provided with a groove which can limit the bottom of the supported equipment.

In the folded state of the support, the stay bar 20 and the extension portion 21 thereof are accommodated in the accommodating cavity 11 of the second plate 10, so that the overall thickness of the folded support is reduced.

The position maintaining mechanism 50 is disposed on the first board body 40 and the sliding board 30, and is used for automatically maintaining the changed included angle after changing the included angle between the second board body 10 and the first board body 40. The specific structure of the position holding mechanism 50 is the same as that of the first embodiment, and will not be described here.

The third embodiment:

referring to fig. 9 to 10, the foldable stand of the third embodiment includes: a first plate 40, a second plate 10, a brace 20, a slide plate 30, and a position holding mechanism 50.

The structures of the first plate 40, the second plate 10, the stay bar 20, and the sliding plate 30 are substantially the same as those of the second embodiment, and are not described herein again.

Referring to fig. 9 to 12, the position holding mechanism 50 includes: rack 51, engaging member 52, and elastic member 53.

The rack 51 is a double-sided rack, and includes two tooth surfaces, each of which is engaged with one of the engaging members 52, and the two engaging members 52 are arranged in a mirror image with respect to the rack 51.

Each of the engagement members 52 includes two teeth 521.

The elastic member 53 and the engaging member 52 are the same elastic sheet, preferably a metal sheet. Both end portions of the elastic piece are respectively arched toward the tooth surface of the rack 51 to constitute two tooth portions 521 of the engaging member 52, and the middle portion of the elastic piece is arched away from the tooth surface to constitute the elastic member 53.

The elastic piece is installed in a snap fit manner with the support 41 on the first plate body 40, and generates elastic force on the two tooth parts 521 on the elastic piece, so that the two tooth parts 521 are matched with different tooth positions of the same tooth surface of the rack 51, the rack 51 is limited, the rack 51 is kept at the current position, and the second plate body 10 and the first plate body 40 are automatically kept at the current included angle. When a twisting force is applied to the stand, and the first plate body 40 and the second plate body 10 are relatively rotated according to the folding direction or the unfolding direction of the stand, the twisting force is transmitted to the sliding plate 30, the sliding plate 30 and the rack 51 slide against the elastic force of the elastic piece, after the twisting force is released, the elastic force of the elastic piece enables the two tooth parts 521 on the elastic piece to reset, the rack 51 is limited, and the second plate body 10 and the first plate body 40 are automatically kept at the rotated positions.

It can be seen that, after the position retaining mechanism 50 is relatively rotated according to the folding direction or the unfolding direction of the bracket, the angle of the rotated position can be automatically maintained without manually operating the stay bar 20, which is very convenient for use. The position holding mechanism 50 is realized by adopting the rack 51 and the elastic sheet with the plurality of tooth parts 521, on one hand, the rack 51 and the elastic sheet are not easy to wear, and the position holding function is not influenced even if the rack 51 and the elastic sheet are worn, on the other hand, the elastic sheet is provided with the plurality of tooth parts 521, and is matched with different tooth positions of the same tooth surface of the rack 51 to realize positioning, so that multi-point control is formed, and the support has the characteristic of high reliability.

In addition, in the present embodiment, the engaging member 52 and the elastic member 53 are implemented by using the same elastic piece, so that the position holding mechanism 50 of the bracket has a simpler structure, is more convenient to manufacture, and has lower cost.

The fourth embodiment:

referring to fig. 13, the foldable stand of the fourth embodiment comprises: the first plate body 40, the second plate body 10, the stay bar 20, the sliding plate 30 and the position holding mechanism 50.

The structures of the first plate body 40, the second plate body 10, the stay bar 20 and the sliding plate 30 are substantially the same as those of the second embodiment, and are not described herein again.

Referring to fig. 14 to 16, the position holding mechanism 50 includes: rack 51, engaging member 52 and elastic member 53.

The rack 51 is a double-sided rack and comprises two tooth surfaces, each tooth surface is meshed with one meshing part 52, and the two meshing parts 52 are arranged in a mirror image mode relative to the rack 51. With this structure, the two engaging members 52 press the rack 51 from both tooth surfaces of the rack 51, and the force applied to both sides of the rack 51 makes the folding operation or the unfolding operation of the present bracket smoother than the force applied to one side. However, the present invention is not limited to this, and the position holding mechanism 50 may be constructed by engaging a single-sided rack with an engaging member 52.

The engaging member 52 also includes a block and a plurality of teeth portions formed on a face portion of the block, as in the first embodiment. The block of the engaging member 52 is slidably engaged with the seat 41 of the first plate 40, and is slidable in a direction toward or away from the rack 51. The elastic member 53 is a spring which abuts against the back of the block of the engaging member and presses the engaging member 52 against the rack 51. A positioning projection to which the spring is attached is also provided on the back of the engaging member 52. The plurality of teeth of the engaging member 52 are engaged with different tooth positions of the same tooth surface of the rack 51.

Note that, in the fourth embodiment, the shapes of both tooth surfaces of the double-sided rack 51 are different. Referring to fig. 16, each tooth position of the upper tooth surface of the double-sided rack 51 has a circular arc-shaped configuration, and one edge 511 and the other edge 512 of the two edges of each tooth position of the lower tooth surface of the double-sided rack 51 are flat and steep. Referring to fig. 15, the engaging member 52 corresponding to the lower tooth surface has a rear portion provided with an operating lever 54, and the operating lever 54 extends outward, being exposed from the edge of the first plate 40.

The plurality of tooth portions of the engaging member 52 are engaged with different tooth positions of the same tooth surface of the rack 51 under the elastic force of the spring, limit the rack 51, and maintain the rack 51 at the current position, so that the second plate 10 and the first plate 40 are automatically maintained at the current included angle. When a torsional force is applied to the bracket, and the first plate body 40 and the second plate body 10 are relatively rotated according to the unfolding direction of the bracket, the torsional force is transmitted to the sliding plate 30, at the moment, the meshing piece 52 on the lower side is in abutting fit with the relatively flat edge of the lower tooth surface of the rack 51, the sliding plate 30 and the rack 51 slide against the resistance of the two meshing pieces 52, after the torsional force is relieved, the elastic force of the spring enables the meshing piece 52 to reset, the rack 51 is limited, and the second plate body 10 and the first plate body 40 are automatically kept at the rotated positions. In the unfolded state of the stand, the engaging member 52 on the lower side in fig. 16 has its teeth in abutment with the steeper edge of the lower tooth face of the rack 51, which makes it more difficult to shift the stand in the folding direction, so that the stand can support a heavier device and is more stable in support. However, this also brings about a problem that: the above-mentioned operating rod 54 is designed to make it difficult to directly fold the stand, when the stand needs to be folded, the operating rod 54 is pulled outwards first to separate the lower engaging member 52 from the rack 51 in fig. 16, and then a relative rotation torque is applied to the first board body 40 and the second board body 10 according to the folding direction of the stand, the torque is transmitted to the sliding plate 30, and the sliding plate 30 and the rack 51 slide against the resistance of the upper engaging member 52 in fig. 16, so that the stand can be folded.

It can be seen that, after the position retaining mechanism 50 is relatively rotated according to the folding direction or the unfolding direction of the bracket, the angle of the rotated position can be automatically maintained without manually operating the stay bar 20, which is very convenient for use. The position holding mechanism 50 is realized by a rack 51, a meshing part 52 with a plurality of tooth parts and a spring, on one hand, the rack 51 and the meshing part 52 are not easy to wear, and the position holding function is not influenced even if the rack 51 and the meshing part 52 are worn, on the other hand, the meshing part 52 is provided with a plurality of tooth parts, and is matched with different tooth positions of the same tooth surface of the rack 51 to realize positioning, so that multi-point control is formed, and therefore, the support has the characteristic of high reliability. In addition, the rack 51 with the special structure enables the bracket to support equipment with larger weight and more stable support.

Fifth embodiment:

referring to fig. 17, the foldable stand of the fifth embodiment includes: the first plate body 40, the second plate body 10, the stay bar 20, the sliding plate 30 and the position holding mechanism 50.

Referring to fig. 18 to 21, the position holding mechanism 50 includes: rack 51, engaging member 52 and elastic member 53.

The rack 51 and the first plate 40 are integrally formed, but not limited thereto, and may be manufactured independently, and then the rack 51 is fixed to the first plate 40 by a fixing manner, such as screwing, welding, clamping, riveting, or the like. The rack 51 extends along the sliding path of the slide 30.

The rack 51 is a double-sided rack 51, and comprises two tooth surfaces, wherein each tooth surface is engaged with an engaging part 52, and the two engaging parts 52 are arranged in a mirror image mode relative to the rack 51.

Each engagement member 52 includes two teeth 521.

The elastic member 53 and the engaging member 52 are the same elastic sheet, preferably a metal sheet. Both end portions of the elastic piece are each arched toward the tooth surface of the rack 51 to constitute two tooth portions 521 of the engaging member 52, and a middle portion of the elastic piece is arched away from the tooth surface to constitute the elastic member 53.

The elastic piece is mounted to the slide plate 30.

As shown in fig. 18, the slide board 30 includes: an upper plate 31, a lower plate 33 opposite to the upper plate 31, the upper plate 31 and the lower plate 33 being connected by two sets of columns 32, each set including three columns 32.

Referring to fig. 18 to 21, the elastic piece is disposed between the upper plate 31 and the lower plate 33 of the slide board 30, and the arched outer side of the middle portion of the elastic piece abuts against the column 32 of the slide board 30.

The operation method of the fifth embodiment is the same as that of the third embodiment, and the unfolding or folding of the bracket can be realized only by relatively rotating the first board body 40 and the second board body 10, and the bracket can be automatically kept in a rotated state by the position keeping mechanism 50, and the position keeping mechanism 50 has no easily worn part, so that the characteristics of convenient operation and high reliability are achieved. It should be noted that, in the third embodiment, the rack 51 is fixed to the slide board 30 and the elastic piece is disposed on the first board 40, while in the fifth embodiment, the rack 51 is fixed to the first board 40 and the elastic piece is disposed on the slide board 30.

The utility model discloses a support can extensively be applicable to various mobile devices, is particularly useful for electronic equipment such as cell-phone, panel computer, notebook computer.

It should be understood that the utility model discloses can also be used for with the mesa cooperation with the second plate body, the first plate body be used for with by the support equipment cooperation, slide and first plate body sliding fit, position holding mechanism set up at first plate body and slide, in other words, can with slide and position holding mechanism set up the support with by support equipment complex plate body. In this application, it is preferable that at least a partial region of the surface of the first board body opposite to the second board body is provided with an anti-slip layer to increase the friction force between the support and the back of the supported device.

The present invention has been described in detail with reference to the specific embodiments, and the detailed description is only for assisting the understanding of the present invention by those skilled in the art, and is not to be construed as limiting the scope of the present invention. Various modifications, equivalent changes, etc. made by those skilled in the art under the spirit of the present invention shall be included in the protection scope of the present invention.

Claims

1. A multi-point controlled foldable stand, comprising:

a first plate body (40);

the second plate body (10) is stacked with the first plate body (40), and one edge of the second plate body (10) is hinged with the first plate body (40), so that the second plate body (10) can rotate to form a certain included angle with the first plate body (40);

one end of the support rod (20) is hinged with the second plate body (10), and the other end of the support rod is hinged with a sliding plate (30) which is arranged on the first plate body (40) in a sliding manner; and

the position retaining mechanism (50) is arranged on the first plate body (40) and the sliding plate (30) and is used for automatically retaining the changed included angle after the included angle between the second plate body (10) and the first plate body (40) is changed;

characterized in that the position retaining mechanism (50) comprises:

a rack (51) extending along a sliding path of the slide plate (30);

an engaging member (52) having a plurality of teeth (521), the plurality of teeth (521) engaging with different tooth positions of the same tooth surface of the rack (51); and

and an elastic member (53) acting on the engaging member (52) to press the engaging member (52) against the rack (51).

2. Multipoint-controlled foldable support according to claim 1, characterized in that the toothed rack (51) is a double-sided toothed rack, the two toothed flanks of which are each engaged by one of the engaging members (52), the two engaging members (52) being arranged in mirror image with respect to the toothed rack (51).

3. The multipoint-controlled foldable stand according to claim 1, characterized in that said engaging member (52) comprises a block (522), said plurality of teeth (521) of engaging member (52) being shaped on a face of said block (522); the elastic member (53) is a spring, and the spring abuts against the back of the block body (522).

4. A multipoint-controlled foldable stand according to claim 3, characterized in that the rack (51) is fixed to the slide (30), and the block (522) of the engaging member (52) is slidably engaged with the first plate (40) in a direction approaching or moving away from the rack (51).

5. Multipoint-controlled foldable stand according to claim 1, characterized in that said engaging member (52) and said elastic member (53) are one and the same elastic piece, the two ends of which are arched towards the tooth surface of said rack (51) respectively, constituting a plurality of teeth (521) of the engaging member (52), and the middle of which is arched away from said tooth surface, constituting said elastic member (53).

6. A multipoint controlled foldable stand according to claim 5, characterized in that said rack (51) is fixed with said slide (30) and said elastic tab is mounted to said first plate (40).

7. A multipoint controlled foldable stand according to claim 5, characterized in that said rack (51) is fixed to said first plate (40) and said elastic tab is mounted to said slide (30).

8. Multi-point controlled foldable stand according to claim 7, characterized in that the slide (30) comprises:

an upper plate (31); and

a lower plate (33) opposite to the upper plate (31) and connected to the upper plate (31) via a plurality of columns (32);

the elastic sheet is arranged between the upper plate (31) and the lower plate (33), and the arched outer side of the middle part of the elastic sheet is abutted against the column body (32).

9. The multipoint-controlled foldable support according to claim 1, characterized in that the first plate (40) or the second plate (10) is provided with a housing cavity (11) in a position corresponding to the stay bar (20), and in the support folded state, the stay bar (20) is received in the housing cavity (11).

10. A multipoint controlled foldable support according to claim 1, characterized in that the ends of the stay (20) hinged to the second plate (10) have extensions (21), said extensions (21) being turned to protrude from a lower-middle position of the upper surface of the second plate (10) when the support is changed from the folded to the unfolded state, so that the second plate (10) constitutes a support portion cooperating with the back of the supported equipment and said extensions (21) constitute a support portion cooperating with the bottom of the supported equipment.

11. The multipoint controlled foldable support according to claim 1, characterized in that the rack (51) is a double-sided rack, each tooth position of one tooth surface of the double-sided rack is in a circular arc structure, two edges of each tooth position of the other tooth surface of the double-sided rack are flat, the other edge is steep, the back of the engaging member (52) corresponding to the other tooth surface is provided with an operating rod (54), and the operating rod (54) extends outwards and is exposed from the edge of the first plate body (40).