CN216984268U

CN216984268U - Protective fence

Info

Publication number: CN216984268U
Application number: CN202220235013.7U
Authority: CN
Inventors: 张光兰
Original assignee: Zhongshan Dongjie Baby And Child Product Co ltd
Current assignee: Zhongshan Dongjie Baby And Child Product Co ltd
Priority date: 2022-01-27
Filing date: 2022-01-27
Publication date: 2022-07-19
Anticipated expiration: 2032-01-27

Abstract

The utility model discloses a guard rail, which comprises: the protection main body comprises a first vertical frame and two second vertical frames, and the second vertical frames are rotatably connected to the first vertical frame and can rotate relative to the first vertical frame to be folded or unfolded; the supporting frame is rotatably connected with the first vertical frame and can rotate relative to the first vertical frame to fold or unfold; the first locking structure is arranged between the first vertical frame and the second vertical frame so as to limit the relative rotation of the first vertical frame and the second vertical frame in at least one direction; and the second locking structure is arranged between the first stand and the support frame so as to limit the relative rotation of the first stand and the support frame in at least one direction. When the foldable support is used, the second vertical frame rotates to be unfolded relative to the first vertical frame, and the support frame rotates to be unfolded relative to the first vertical frame. When the protective guard is stored, the support frame is rotated to be folded on the first vertical frame relative to the first vertical frame, the second vertical frame is rotated to be folded on the first vertical frame, locking is reliable, the overall size of the protective guard is reduced, storage and transportation are facilitated, and the occupied space is small.

Description

Protective fence

Technical Field

The utility model relates to the technical field of bed protection devices, in particular to a protective guard.

Background

In daily life, the guard rail is arranged on the bed, so that the safety protection effect is achieved when children play or have a rest. The existing protective guard generally comprises a protective main body and a support frame arranged at the bottom of the protective main body, and when the protective guard is used, the support frame is inserted into a bed bottom or between a mattress and a bed board, and the protective main body can be kept in an upright state by pressing the support frame. Although the protective guard can play a good protection role, the protective main body of the protective guard is long, and the support frame and the protective main body are fixedly arranged, so that the protective guard is large in size, inconvenient to store, capable of occupying a large storage space and troublesome to transport.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the protective guard provided by the utility model is convenient to store and transport and occupies a small space.

The guard rail according to the embodiment of the present invention includes: the protective main body comprises a first stand and at least one second stand, and the second stand is rotatably connected to the first stand and can rotate relative to the first stand to fold or unfold; the support frame is rotatably connected with the first vertical frame and can rotate, fold or unfold relative to the first vertical frame; the first locking structure is arranged between the first vertical frame and the second vertical frame so as to limit relative rotation of the first vertical frame and the second vertical frame in at least one direction; and the second locking structure is arranged between the first stand and the support frame so as to limit the relative rotation of the first stand and the support frame in at least one direction.

The protective guard provided by the embodiment of the utility model at least has the following beneficial effects: adopt above-mentioned structure, when using, rotate the relative first grudging post of second grudging post to expansion, the relative first grudging post of support frame rotates to expansion, inserts at the bottom of the bed or between mattress and the bed board through the support frame, pushes down the support frame and can let the protection main part keep upright state. When accomodating, rotate the support frame relative first grudging post to folding up on first grudging post, the second grudging post rotates to folding up on first grudging post, through being provided with first locking structure and second locking structure, the locking is reliable, has reduced the whole volume of rail guard, is convenient for accomodate and transport, and occupation space is less.

According to some embodiments of the utility model, the first stand is pivotally connected to the second stand, and the first locking structure is configured to limit pivoting of the first stand and the second stand; the first vertical frame is connected with the support frame in a vertically rotating mode, and the second locking structure is used for limiting the first vertical frame and the support frame in a vertically rotating mode. Locking and unblock operation are all very convenient to convenience of customers accomodates and expandes the operation, and the support frame rotates from top to bottom, and the second grudging post rotates from left to right, makes the two draw close in first grudging post in proper order, with the volume that reduces the rail guard, makes things convenient for the use of rail guard.

According to some embodiments of the utility model, the first and second locking structures each comprise: a fixing base provided with a fixing portion; the connecting seat is rotatably connected with the fixed seat, and a connecting part is arranged on the connecting seat; the locking part can slide to the fixed part and the connecting part along with the locking part and is fixedly matched with the fixed part and the connecting part at the same time so as to limit the relative rotation of the connecting seat and the fixed seat; the first elastic piece is arranged between the locking piece and the fixed seat; the unlocking piece is arranged in the connecting seat, the unlocking piece is connected with the locking piece in a transmission mode, the unlocking piece is used for driving the locking part to slide to the connecting part and one of the fixing parts to be disengaged from the matching. When the first locking structure or the second locking structure is in a locking state, the locking part of the locking part is fixedly matched with the fixing part and the connecting part at the same time, and then the fixing seat and the connecting seat cannot rotate relatively, namely the second vertical frame cannot rotate left and right relative to the first vertical frame, and the supporting frame cannot rotate up and down relative to the first vertical frame; when the unblocking piece is pressed downwards, slide through unblocking piece drive locking piece for the sticking part slides to break away from the cooperation with connecting portion, and then fixing base and connecting seat can rotate relatively, thereby the second grudging post can rotate first grudging post relatively, and the support frame can rotate first grudging post relatively, in order to launch, and locking and unblock convenient operation are swift, and can guarantee assembly stability.

According to some embodiments of the present invention, a fixing recess is disposed on the fixing base, the fixing portion is a fixing groove disposed on a sidewall of the fixing recess, a connecting recess is disposed on the connecting base, the connecting portion is a connecting groove disposed on a sidewall of the connecting recess, and the fixing groove is aligned with and communicates with the connecting groove; the locking piece is slidably arranged in the fixed concave position, the upper end surface of the locking piece is abutted against the unlocking piece, and the first elastic piece is positioned between the fixed concave position and the locking piece; the locking part correspond set up in the fixed slot, but the locking part slidable to while with the fixed slot the spread groove joint cooperation, in order to restrict the connecting seat is relative the fixing base rotates, simple structure, the simple operation, stability is good, and can make the locking piece can keep fixed and reset fast through first elastic component.

According to some embodiments of the present invention, the first elastic member is a compression spring disposed in the fixing concave portion, one end of the compression spring abuts against the locking member, and the other end of the compression spring abuts against the fixing concave portion, so as to further prevent the first elastic member from moving, improve the reliability of the reset, and have a stable and reliable structure.

According to some embodiments of the present invention, the connecting seat is provided with a mounting groove, and a guide through hole communicated with the connecting groove is provided in the mounting groove; the unlocking piece comprises a pressing part and a driving part connected with the pressing part, the pressing part is located in the mounting groove, the driving part is slidably inserted into the guide through hole and is in butt fit with the locking part. According to the splenium so that drive division slides towards the locking piece through pressing down to drive locking portion break away from and make the locking piece accept to fixed concave position in with the joint relation of spread groove, simple structure, and played the guide effect, the operation is comparatively convenient.

According to some embodiments of the utility model, a limiting groove communicated with the connecting groove is arranged in the connecting concave position, and the limiting groove is communicated with the guide through hole; the drive portion is provided with a protrusion at one end far away from the pressing portion, and the limiting groove is in sliding fit with the protrusion and can limit the maximum moving distance of the protrusion. Avoid knowing the latch fitting and break away from the mounting groove, improved the stability of installation, compact structure, and be favorable to locking fast or relieve the rotational relation of first grudging post and second grudging post.

According to some embodiments of the utility model, the number of the fixing grooves is provided in plurality, and the plurality of the fixing grooves are circumferentially provided along the fixing concave portion; the number of the connecting grooves is multiple, and the connecting grooves are arranged along the circumferential direction of the connecting concave positions; the number of the locking parts is set to be plural, and the plural locking parts are arranged along the circumferential direction of the locking piece. Further improve the structural strength of first locking structure and second locking structure, improve the operational reliability.

According to some embodiments of the present invention, the first vertical frame includes a first frame body and a second frame body movably connected to the first frame body up and down, and a positioning structure is disposed between the first frame body and the second frame body for limiting relative movement therebetween. The first vertical frame of the protective guard is arranged to be an adjustable telescopic structure, so that the height of the protective guard is adjusted according to needs, the protective effect is further improved, the protective guard can adapt to cribs or other beds with different heights, and the protective guard is good in adaptability, safe and reliable.

According to some embodiments of the utility model, the positioning structure comprises: the moving channel is arranged on the first frame body, and a plurality of positioning concave positions are arranged on the side wall of the moving channel; the locating element, with the movably connection of second support body, the locating element include with location concave position adaptation's location portion, location portion can follow the locating element removes to the card and locates in the location concave position, in order to restrict first support body with the second support body reciprocates. Through pressing the locating piece to make location portion break away from in the concave position of location, thereby second support body and first support body relative movement, simple structure, the location is reliable.

Drawings

Fig. 1 is a schematic view illustrating an overall structure of a guard rail according to an embodiment of the present invention;

fig. 2 is a schematic view illustrating a partial structure of a guard rail according to an embodiment of the present invention;

FIG. 3 is an exploded view of FIG. 2;

FIG. 4 is a schematic view of the first cross-section of FIG. 3;

FIG. 5 is a second cross-sectional view of FIG. 3;

FIG. 6 is an enlarged schematic view of the structure at A in FIG. 5;

FIG. 7 is an enlarged schematic view of the structure at B in FIG. 5;

FIG. 8 is a schematic structural view of the positioning member and the second elastic member;

reference numerals:

a first vertical frame 10, a first frame body 11 and a second frame body 12;

a second stand 20 and a support frame 30;

a fixed seat 41, a fixed part 411, a fixed concave part 412,

The connecting seat 42, the connecting part 421, the connecting recess 422, the mounting groove 423, the guide hole 424, the limiting groove 425, the locking piece 43, the locking part 431, the locking part,

The first elastic member 44, the unlocking member 45, the pressing portion 451, the driving portion 452, the projection 453;

the moving channel 51, the positioning concave 511, the positioning piece 52, the positioning part 521, the pushing part 522 and the second elastic piece 53.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, if there are first and second descriptions for distinguishing technical features, they are not interpreted as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the precedence of the indicated technical features.

In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

As shown in fig. 1 to 6, a guard rail according to an embodiment of the present invention includes: the protection main body comprises a first vertical frame 10 and two second vertical frames 20 respectively positioned at two sides of the first vertical frame 10, wherein the second vertical frames 20 are rotatably connected to the first vertical frame 10 and can rotate relative to the first vertical frame 10 to be folded or unfolded; the supporting frame 30 is rotatably connected with the first vertical frame 10, and the supporting frame 30 can rotate relative to the first vertical frame 10 to fold or unfold; a first locking structure disposed between the first stand 10 and the second stand 20 to restrict relative rotation therebetween in at least one direction; and a second locking structure arranged between the first stand 10 and the support frame 30 to limit the relative rotation of the two in at least one direction.

According to the guard rail of the embodiment of the utility model, by adopting the structure, when the guard rail is used, the second vertical frame 20 rotates relative to the first vertical frame 10 to be unfolded, the support frame 30 rotates relative to the first vertical frame 10 to be unfolded, and the support frame 30 is inserted into a bed bottom or between a mattress and a bed board, so that the support frame 30 is pressed to keep the upright state of the guard main body. When the protective guard is stored, the support frame 30 is rotated relative to the first vertical frame 10 to be folded on the first vertical frame 10, the second vertical frame 20 is rotated to be folded on the first vertical frame 10, and the first locking structure and the second locking structure are arranged, so that the protective guard is reliably locked, the whole volume of the protective guard is reduced, the storage and the transportation are convenient, and the occupied space is small.

It will be appreciated that in some embodiments of the present invention, the number of the second stand 20 is two, and the two stand are respectively rotatably connected to two sides of the first stand 10 through rotating shafts; of course, in some embodiments, the number of the second stand 20 may also be one, and the like, which is not limited herein.

It should be noted that in some embodiments of the present invention, the protective body is provided with a protective cloth covering the first standing frame 10 and the second standing frame 20, or in some embodiments, the first standing frame 10 and the second standing frame 20 are both provided with a grid structure and a protective cloth covering the grid structure.

It will be appreciated that in some embodiments of the present invention, as shown in fig. 1 to 6, the first stand 10 is pivotally connected to the second stand 20 from side to side, and the first locking structure is configured to restrict the first stand 10 from pivoting from side to side with the second stand 20; the first vertical frame 10 is connected with the support frame 30 in a vertical rotating manner, and the second locking structure is used for limiting the vertical rotation of the first vertical frame 10 and the support frame 30. By adopting the structure, when the protective guard needs to be unfolded, the locking state of the first vertical frame 10 and the second vertical frame 20 and the locking state of the first vertical frame 10 and the support frame 30 can be released by sequentially unlocking the first locking structure and the second locking structure, so that the second vertical frame 20 and the support frame 30 can rotate relative to the first vertical frame 10, the first vertical frame 10 and the second vertical frame 20 are locked by the first locking structure again, the second locking structure locks the first vertical frame 10 and the support frame 30 to limit the protective guard to be kept in the unfolded state, the locking and unlocking operations are both convenient, the storage and the unfolding operations of a user are convenient, the support frame 30 rotates up and down, the second vertical frame 20 rotates left and right, the first vertical frame 10 and the second vertical frame 20 can be sequentially closed, the size of the protective guard is reduced, and the use of the protective guard is convenient.

It is understood that the first locking structure can limit at least one direction of relative movement between the first stand 10 and the second stand 20, i.e. the first locking structure can limit the left direction rotation and the right direction rotation of the second stand 20, or limit the left direction rotation or the right direction rotation of the second stand 20; the second locking structure can limit at least one direction of relative movement between the first vertical frame 10 and the support frame 30, that is, the second locking structure can limit the support frame 30 to rotate in the upward direction and the downward direction, or limit the support frame 30 to rotate in the upward direction or the downward direction.

As shown in fig. 1-6, in some embodiments of the present invention, the first and second locking structures each comprise: a holder 41 provided with a fixing portion 411; the connecting seat 42 is rotatably connected with the fixed seat 41, and a connecting part 421 is arranged on the connecting seat 42; a locking member 43 slidably disposed on the fixing base 41, the locking member 43 being provided with a locking portion 431, the locking portion 431 being slidable to follow the locking member 43 and being fixedly engaged with the fixing portion 411 and the connecting portion 421 to limit the relative rotation between the connecting base 42 and the fixing base 41; a first elastic member 44 disposed between the locking member 43 and the fixing base 41; the unlocking piece 45 is arranged on the connecting seat 42, the unlocking piece 45 is in transmission connection with the locking piece 43, and the unlocking piece 45 is used for driving the locking part 431 to slide to be separated from the connecting part 421. During installation, the two ends of the first vertical frame 10 are respectively provided with a fixing seat 41, and the second vertical frame 20 and the supporting frame 30 are both provided with a connecting seat 42. With the above structure, when the first locking structure or the second locking structure is in a locking state, the locking portion 431 of the locking member 43 is simultaneously and fixedly matched with the fixing portion 411 and the connecting portion 421, and then the fixing seat 41 and the connecting seat 42 cannot rotate relatively, that is, the second vertical frame 20 cannot rotate left and right relative to the first vertical frame 10, and the supporting frame 30 cannot rotate up and down relative to the first vertical frame 10; when the unlocking piece 45 is pressed downwards, the locking piece 43 is driven to slide through the unlocking piece 45, so that the locking part 431 slides to be separated from the matching with the connecting part 421, then the fixed seat 41 and the connecting seat 42 can rotate relatively, the second stand 20 can rotate relative to the first stand 10, the supporting frame 30 can rotate relative to the first stand 10 to be unfolded, the locking and unlocking operation is convenient and fast, and the assembling stability can be ensured.

Of course, in some embodiments, the locking portion 431 may be slid out of engagement with the fixture 411; in addition, in some embodiments, the unlocking member 45 is disposed on the fixing base 41, and the locking portion 431 is disengaged from the connecting portion 421 by pulling the unlocking member 45 downward relative to the fixing base 41, which still has the above-mentioned effects.

It is contemplated that in some embodiments, the two ends of the first vertical frame 10 are respectively provided with the connecting seats 42, and the second vertical frame 20 and the supporting frame 30 are provided with the fixing seats 41, i.e. the positions are interchanged with the installation of the embodiment adopted by the present invention.

As shown in fig. 1 to 6, in some embodiments of the present invention, the fixing base 41 is provided with a fixing recess 412, the fixing portion 411 is a fixing groove disposed on a sidewall of the fixing recess 412, the connecting base 42 is provided with a connecting recess 422, the connecting portion 421 is a connecting groove disposed on a sidewall of the connecting recess 422, and the fixing groove is aligned with and communicated with the connecting groove; the locking piece 43 is slidably arranged in the fixing concave part 412, the upper end face of the locking piece 43 is abutted against the unlocking piece 45, and the first elastic piece 44 is positioned between the fixing concave part 412 and the locking piece 43; the locking part 431 is correspondingly disposed in the fixing groove, and the locking part 431 can slide to be simultaneously in snap fit with the fixing groove and the connecting groove so as to limit the connecting seat 42 to rotate relative to the fixing seat 41. Adopt above-mentioned structure, when the sticking department 431 and fixed slot, the connecting groove joint simultaneously, can restrict connecting

seat

42 and 41 relative rotations of fixing base, be in the locking state promptly, break away from the joint when sticking department 431 and connecting groove, but connecting seat 42 relative fixing base 41 rotates, is in the unblock state, simple structure, the simple operation, stability is good, and can make locking piece 43 keep fixed and quick reset through first elastic component 44.

In some embodiments of the present invention, the first elastic element 44 is a compression spring disposed in the fixing recess 412, one end of the compression spring abuts against the locking element 43, and the other end abuts against the fixing recess 412, so as to further prevent the first elastic element 44 from moving, improve the reliability of the reset, and have a stable and reliable structure.

As shown in fig. 1 to 6, in some embodiments of the present invention, a mounting groove 423 is formed on the coupling seat 42, and a guide through hole 424 communicating with the coupling groove is formed in the mounting groove 423; the unlocking member 45 includes a pressing portion 451 and a driving portion 452 connected to the pressing portion 451, the pressing portion 451 is located in the mounting groove 423, and the driving portion 452 is slidably inserted into the guide through hole 424 and is abutted against and engaged with the locking member 43. By adopting the structure, the pressing part 451 is pressed to enable the driving part 452 to slide towards the locking part 43, so that the locking part 431 is driven to be separated from the clamping relation with the connecting groove, the locking part 43 is enabled to be accommodated in the fixed concave position 412, the structure is simple, the guiding effect is achieved, and the operation is convenient.

It is contemplated that, as shown in fig. 1 to 6, in some embodiments of the present invention, a stopper groove 425 communicating with the coupling groove is provided in the coupling recess 422, the stopper groove 425 communicating with the guide through-hole 424; a protrusion 453 is provided at an end of the driving portion 452 away from the pressing portion 451, and the stopper groove 425 is slidably engaged with the protrusion 453 to limit a maximum moving distance of the protrusion 453. By adopting the structure, the maximum moving distance of the unlocking piece 45 sliding downwards is limited, and when the unlocking piece 45 moves downwards and cannot move, the locking state of the fixed seat 41 and the connecting seat 42 can be released; the maximum moving distance of the unlocking member 45 sliding up and down is limited, the unlocking member 45 is prevented from being separated from the mounting groove 423, the mounting stability is improved, the structure is compact, and the rotating relation between the first vertical frame 10 and the second vertical frame 20 is locked or released quickly.

As shown in fig. 3 and 4, in some embodiments of the present invention, the number of the fixing grooves is provided in plurality, and the plurality of fixing grooves are circumferentially provided along the fixing groove 412; the number of the connecting grooves is multiple, and the connecting grooves are arranged along the circumferential direction of the connecting concave position 422; the number of the locking portions 431 is set to be plural, and the plural locking portions 431 are provided along the circumferential direction of the locking member 43, so that the structural strength of the first locking structure and the second locking structure is further improved, and the operational reliability is improved.

It should be noted that, in some embodiments of the present invention, the number of the fixing grooves and the number of the connecting grooves and the number of the locking portions 431 are all four, and the number of the fixing grooves and the number of the connecting grooves and the number of the locking portions 431 are all corresponding to each other.

Of course, in some embodiments, the first locking structure and the second locking structure may also be configured differently, and are not limited herein.

As shown in fig. 1 to 5 and fig. 7 and 8, in some embodiments of the present invention, the first stand 10 includes a first frame body 11 and a second frame body 12 movably connected to the first frame body 11 up and down, and a positioning structure is disposed between the first frame body 11 and the second frame body 12 to limit relative movement therebetween. The first vertical frame 10 of the protective guard is arranged to be an adjustable telescopic structure, so that the height of the protective guard can be adjusted according to needs, the protection effect is further improved, the protective guard can adapt to cribs or other beds with different heights, and the protective guard is good in adaptability, safe and reliable.

It should be noted that, in some embodiments of the present invention, the second vertical frame 20 is a U-shaped structure, one end of the second vertical frame 20 is fittingly installed at one end of the first frame body 11 through the connecting seat 42, the fixing seat 41 and a rotating shaft for rotatably connecting the two, and the other end of the second vertical frame 20 is rotatably connected with the other end of the first frame body 11 through the rotating shaft; the supporting frame 30 is a U-shaped structure, and two ends of the supporting frame 30 are mounted at one end of the second frame 12 through the connecting seat 42, the fixing seat 41 and a rotating shaft connecting the two in a rotating manner.

As shown in fig. 1 to 5 and fig. 7 and 8, in some embodiments of the present invention, the positioning structure comprises: the moving channel is arranged on the first frame body 11, and a plurality of positioning concave positions 511 are arranged on the side wall of the moving channel; the positioning member 52 is movably connected with the second frame 12, the positioning member 52 includes a positioning portion 521 matched with the positioning recess 511, and the positioning portion 521 can move along with the positioning member 52 to be clamped in the positioning recess 511 to limit the up-and-down movement of the first frame 11 and the second frame 12. By adopting the above structure, when the positioning portion 521 of the positioning member 52 is clamped in the positioning concave 511, the relative movement between the second frame body 12 and the first frame body 11 can be limited, when the first vertical frame 10 needs to be extended, the positioning member 52 is pressed to separate the positioning portion 521 from the positioning concave 511, so that the second frame body 12 and the first frame body 11 move relatively, the structure is simple, and the positioning is reliable.

It should be noted that, in some embodiments of the present invention, the first frame body 11 and the second frame body 12 are both hollow tubular structures, the first frame body 11 is sleeved outside the second frame body 12, the second frame body 12 is provided with an insertion hole for the positioning element 52 to be slidably inserted, a second elastic element 53 for driving the positioning element 52 to reset is disposed between the second frame body 12 and the positioning element 52, the second elastic element 53 may be a compression spring or an elastic plate, the positioning element 52 further includes a pushing portion 522 connected to the positioning portion 521, the pushing portion 522 is adapted to the moving channel, the pushing portion 522 is pressed to enable the positioning portion 521 to move toward the second frame body 12, the positioning portion 521 and the positioning concave 511 are separated from the clamping relationship, so that the first frame body 11 and the second frame body 12 can move up and down relatively.

All possible combinations of the technical features in the above embodiments may not be described for the sake of brevity, but should be considered as being within the scope of the present disclosure as long as there is no contradiction between the combinations of the technical features.

The utility model is not limited to the above embodiments, and those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the utility model, and such equivalent modifications or substitutions are included in the scope defined by the claims of the present application.

Claims

1. A guard rail, comprising:

the protection main body comprises a first stand (10) and at least one second stand (20), wherein the second stand (20) is rotatably connected to the first stand (10) and can be folded or unfolded in a rotating mode relative to the first stand (10);

the supporting frame (30) is rotatably connected with the first stand (10), and the supporting frame (30) can rotate relative to the first stand (10) to fold or unfold;

a first locking structure arranged between the first stand (10) and the second stand (20) to limit relative rotation of the first stand and the second stand in at least one direction;

and the second locking structure is arranged between the first stand (10) and the support frame (30) so as to limit the relative rotation of the first stand and the support frame in at least one direction.

2. Guard rail according to claim 1 characterized in that the first stand (10) is connected with the second stand (20) for left and right rotation, the first locking structure is used to limit the left and right rotation of the first stand (10) and the second stand (20);

the first vertical frame (10) is connected with the support frame (30) in a vertically rotating mode, and the second locking structure is used for limiting the vertical rotation of the first vertical frame (10) and the support frame (30).

3. A guard rail according to claim 1 or 2 wherein the first and second locking formations each comprise:

a fixed seat (41) provided with a fixed part (411);

the connecting seat (42) is rotatably connected with the fixed seat (41), and a connecting part (421) is arranged on the connecting seat (42);

the locking piece (43) is slidably arranged on the fixed seat (41), a locking part (431) is arranged on the locking piece (43), and the locking part (431) can slide to the fixed part (411) and the connecting part (421) along with the locking piece (43) and is fixedly matched with the fixed part (411) and the connecting part (421) at the same time so as to limit the relative rotation of the connecting seat (42) and the fixed seat (41);

a first elastic member (44) disposed between the locking member (43) and the fixing seat (41);

unlocking piece (45), set up in connecting seat (42), unlocking piece (45) with locking piece (43) transmission is connected, unlocking piece (45) are used for the drive locking part (431) slide to with connecting portion (421) with one of the two of fixed part (411) breaks away from the cooperation.

4. The guard rail according to claim 3, wherein the fixing base (41) is provided with a fixing recess (412), the fixing portion (411) is a fixing groove formed in a side wall of the fixing recess (412), the connecting base (42) is provided with a connecting recess (422), the connecting portion (421) is a connecting groove formed in a side wall of the connecting recess (422), and the fixing groove is aligned with and communicated with the connecting groove;

the locking piece (43) is slidably arranged in the fixing concave position (412), the upper end surface of the locking piece (43) is abutted against the unlocking piece (45), and the first elastic piece (44) is positioned between the fixing concave position (412) and the locking piece (43);

the locking part (431) is correspondingly arranged in the fixed groove, and the locking part (431) can slide to be simultaneously in clamping fit with the fixed groove and the connecting groove so as to limit the connecting seat (42) to rotate relative to the fixed seat (41).

5. Guard rail according to claim 4 characterized in that said first elastic means (44) are compression springs placed inside said fixed housing (412), one end of said compression springs abutting against said locking means (43) and the other end abutting against said fixed housing (412).

6. The guard rail according to claim 4, wherein the connecting seat (42) is provided with a mounting groove (423), and a guide through hole (424) communicated with the connecting groove is formed in the mounting groove (423);

the unlocking piece (45) comprises a pressing part (451) and a driving part (452) connected with the pressing part (451), the pressing part (451) is located in the installation groove (423), and the driving part (452) can be slidably inserted into the guide through hole (424) and is abutted and matched with the locking piece (43).

7. The guard rail according to claim 6, wherein a limiting groove (425) communicated with the connecting groove is arranged in the connecting concave part (422), and the limiting groove (425) is communicated with the guide through hole (424);

a protrusion (453) is arranged at one end, far away from the pressing part (451), of the driving part (452), and the limiting groove (425) is matched with the protrusion (453) in a sliding mode and can limit the maximum moving distance of the protrusion (453) in a moving mode.

8. The guard rail according to claim 4, wherein the number of the fixing grooves is set to be plural, and the plurality of the fixing grooves are circumferentially arranged along the fixing groove (412);

the number of the connecting grooves is multiple, and the connecting grooves are circumferentially arranged along the connecting concave positions (422);

the number of the locking parts (431) is set to be plural, and the plural locking parts (431) are arranged along the circumferential direction of the locking piece (43).

9. Guard railing according to claim 1, characterized in that the first vertical frame (10) comprises a first frame (11) and a second frame (12) connected to the first frame (11) in a vertically movable manner, and a positioning structure for limiting the relative movement between the first frame (11) and the second frame (12) is arranged between the first frame (11) and the second frame (12).

10. The guard rail according to claim 9, wherein the positioning structure comprises:

the moving channel (51) is arranged on the first frame body (11), and a plurality of positioning concave positions (511) are arranged on the side wall of the moving channel (51);

the positioning piece (52) is movably connected with the second frame body (12), the positioning piece (52) comprises a positioning part (521) matched with the positioning concave position (511), and the positioning part (521) can move along with the positioning piece (52) to be clamped in the positioning concave position (511) so as to limit the first frame body (11) and the second frame body (12) to move up and down.