CN212453905U - Folding arm, pi-shaped frame and large-scale tent support capable of being folded rapidly by single person - Google Patents

Abstract

The utility model provides a folding arm, a n-shaped frame and a large tent bracket which can be folded quickly by a single person, wherein the folding arm comprises a straight pipe A, a straight pipe B, a straight pipe C and a first lock arm mechanism, the straight pipe A and the straight pipe B are connected in a way of being capable of rotating 180 degrees, and the straight pipe B and the straight pipe C are connected in a way of being capable of rotating 90 degrees; when the straight pipe B and the straight pipe C are folded from a vertical state to a parallel state, the pull rope is tensioned and stressed to pull the bolt and compress the elastic element, so that the bolt extends out of the straight pipe A, and the straight pipe A and the straight pipe B can rotate freely; when the straight pipe B and the straight pipe C are unfolded from a parallel state to a vertical state, the pull rope is loosened, the elastic piece resets to push the bolt to be partially inserted into the straight pipe A, and the straight pipe A is fixedly connected with the straight pipe B. The utility model provides a folding arm through folding straight tube B and straight tube C, can realize locking or unblock between straight tube A and the straight tube B, its simple structure, convenient operation.

Description

Folding arm, pi-shaped frame and large-scale tent support capable of being folded rapidly by single person

Technical Field

The utility model relates to a tent technical field, concretely relates to folding arm, pi type frame and single large-scale tent support that can fold fast.

Background

The folding tent can be unfolded when in use and folded and stored when not in use, and has the advantages of wind and rain shielding and convenient carrying.

In the prior art, there are many types of folding tents, such as a folding tent (CN2017207723231) provided by the chinese utility model patent, which includes a support rod, a base and a retractable guide rod; one end of the guide rod is connected with the top connecting seat of the folding tent, and the other end of the guide rod is connected with the base; the base and the guide rod are provided with locking mechanisms which are matched with each other, and when the folding tent is unfolded and fixed, the base and the guide rod are locked through the locking mechanisms. When the tent is used, the following defects exist:

1. for a large-sized tent, multiple persons are required for cooperative operation in supporting and storing, and the tent is difficult to unfold and store by a single person.

2. Need the higher people of height or accomplish to support and accomodate with the help of propping high subassembly, support and accomodate complex operation, hard.

SUMMERY OF THE UTILITY MODEL

To the defect among the prior art, the utility model provides a folding arm, pi type frame and single large-scale tent support that can fold fast through improving folding arm, can conveniently build and fold the tent support, realize one-man operation simultaneously.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model discloses a first aspect provides a folding arm, including straight tube A, straight tube B, straight tube C and first lock arm mechanism, straight tube A is connected with straight tube B in the mode of rotatable 180 degrees through the reverse connecting piece of overcoat formula, straight tube B is connected with straight tube C in the mode of rotatable 90 degrees through the corner connecting piece;

the first lock arm mechanism comprises a fixing part, a guide part, a limiting part, an elastic part, a pull rope and a bolt, wherein the fixing part is fixedly arranged in the straight pipe C, the guide part is arranged in the corner connecting part, the limiting part is fixedly arranged in the straight pipe B, the elastic part is arranged in the straight pipe B, one end of the elastic part is fixedly connected to the limiting part, one end of the bolt is abutted against the elastic part, one end of the pull rope is fixedly arranged on the fixing part, the other end of the pull rope rounds the surface of the guide part, and the pull rope penetrates through the limiting part and the elastic part and then is connected with one end; when the straight pipe B and the straight pipe C are folded from a vertical state to a parallel state, the pull rope is tensioned and stressed to pull the plug pin and compress the elastic element, so that the plug pin extends out of the straight pipe A, and the straight pipe A and the straight pipe B can rotate freely; when the straight pipe B and the straight pipe C are unfolded from a parallel state to a vertical state, the pull rope is loosened, and the elastic piece resets to push the bolt to be partially inserted into the straight pipe A, so that the straight pipe A is fixedly connected with the straight pipe B.

When above-mentioned folding arm expandes, at first with straight tube A and the rotatory collineation of straight tube B, later rotatory straight tube C or rotatory straight tube A and straight tube B simultaneously, make straight tube B be 90 contained angle with straight tube C, rotatory in-process, because the stay cord loses the mounting pulling and relaxes, the elastic component loses the stay cord pulling and resets and promote the bolt local insertion straight tube A, realize straight tube A and straight tube B fixed connection, when folding arm is folding to be accomodate, rotatory straight tube C or rotatory straight tube A and straight tube B simultaneously, make straight tube B and straight tube C parallel, in rotatory in-process, because stay cord atress pulling bolt and compression elastic component, make the bolt stretch out from straight tube A, straight tube A loses the bolt restriction with straight tube B, straight tube A and straight tube B are free rotation.

The utility model provides a folding arm through folding straight tube B and straight tube C, can realize locking or unblock between straight tube A and the straight tube B, its simple structure, convenient operation.

As an improved technical scheme, the reverse connecting piece comprises a first connecting sleeve, a second connecting sleeve and a hinged shaft, the first connecting sleeve is sleeved outside the outer wall of the end part of the straight pipe A close to the straight pipe B, the second connecting sleeve is sleeved outside the outer wall of the end part of the straight pipe B close to the straight pipe A, the first connecting sleeve is provided with a first hinged part extending towards the second connecting sleeve, the second connecting sleeve is provided with a second hinged part extending towards the first connecting sleeve, and the second connecting sleeve is connected with the first connecting sleeve through the hinged shaft penetrating through the first hinged part and the second hinged part.

As an improved technical scheme, the corner connecting piece includes first corner portion, second corner portion and connecting axle, first corner portion includes first grafting pipe and hangs down and locate the inferior valve of first grafting pipe terminal surface lower part, the free end interpolation of first grafting pipe sets firmly in straight tube C, second corner portion includes the second and pegs graft the pipe and hang down the epitheca of locating second grafting pipe terminal surface upper portion, the free end interpolation of second grafting pipe sets firmly in straight tube B, the epitheca forms the casing that has the cylindricality cavity with the stack from top to bottom of inferior valve, the connecting axle activity runs through in epitheca and inferior valve, the binding face of inferior valve has 90 recesses, the binding face of epitheca has can be at recess internal rotation 90 protruding.

The utility model discloses the second aspect provides a pi type frame, it includes two above-mentioned arbitrary items a folding arm, still include the second locking arm structure the same with first locking arm mechanism structure, the same guide of second locking arm structure and first locking arm mechanism sharing, and two straight tubes C that second locking arm structure is used for unblock/locking pi type frame.

As an improved technical scheme, the guide piece shared by the second locking arm structure and the first locking arm structure is a double-winding pulley.

The third aspect of the utility model provides a large tent bracket which can be folded by a single person quickly, comprising a connecting base, a first supporting unit and a second supporting unit; the connecting bases are in a pair, and each connecting base is provided with an opening cavity; the first support unit comprises at least the n-shaped frame, two ends of the n-shaped frame correspondingly extend into the two open cavities, the n-shaped frame positioned at the bottom or the n-shaped frame positioned at the top is fixedly connected with the connecting base, and the rest n-shaped frames are hinged with the connecting base; the second supporting unit comprises two hydraulic rods and at least two telescopic rods, the two hydraulic rods are hinged to the n-shaped frame on the uppermost portion and the n-shaped frame on the lowermost portion respectively, and the connection point of the hydraulic rods and the n-shaped frame is close to the hinged end of the n-shaped frame and the hinged end of the connection base. The telescopic links are at least two, and two ends of the at least two telescopic links are hinged to the bending parts of the n-shaped frame.

As an improved technical scheme, when the number of the n-shaped frames is two, one n-shaped frame forms a vertical support frame, and the other n-shaped frame forms a horizontal support frame; the telescopic link is two, and the one end and the kink of vertical support frame of telescopic link are connected, and the other end and the kink of horizontal support frame of telescopic link are connected, and two telescopic link parallel arrangement.

When the number of the n-shaped frames is more than or equal to three, one n-shaped frame forms a vertical support frame, the other n-shaped frame forms a horizontal support frame, and the rest n-shaped frames form inclined support frames; the telescopic links are multiple and used for supporting two adjacent n-shaped frames.

As an improved technical scheme, the straight tube B is sleeved with a connecting tube sleeve, the connecting tube sleeve is provided with an elastic clamping part, and after the tent support is folded, the telescopic rod is partially clamped into the elastic clamping part to realize clamping connection of the telescopic rod and the straight tube B.

As an improved technical scheme, the opening of the opening cavity of the connecting base is arc-shaped, and the central angle of the opening is 90 degrees.

The utility model provides a pair of single large-scale tent support that can fold fast takes out the tent in accomodating the bag, then opens out, through drawing straight tube C, but rapid prototyping does not need loaded down with trivial details tent skeleton of putting up, single probably need 30 seconds alright put up the tent that family camping that a section is fit for many people to use.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

Fig. 1 is a perspective view of a folding arm according to a first embodiment;

FIG. 2 is a side view of a folding arm according to one embodiment;

FIG. 3 is a sectional view taken along line A-A in FIG. 2 (expanded state);

fig. 4 is a folded sectional view (folded state) of fig. 3;

FIG. 5 is an exploded view of FIG. 1;

fig. 6 is a schematic perspective view of a pi-shaped frame according to the second embodiment;

FIG. 7 is an internal view at B of FIG. 6;

fig. 8 is a perspective view of a large tent frame that can be folded by a single person quickly according to the third embodiment;

reference numerals:

101-straight pipe A; 102-straight tube B; 103-straight pipe C;

201-a fixing member; 202-a guide; 203-a limit stop; 204-an elastic member; 205-a pull rope; 206-a plug pin;

30-corner connectors; 301-a first bayonet tube; 302-inferior shell; 303-a second bayonet tube; 304-upper shell; 305-a connecting shaft; 306-a groove; 307-bumps;

40-reverse link; 401-first coupling sleeve; 402-a second connecting sleeve; 404-a first hinge; 405-a second hinge; 406-a positioning sleeve; 407-a positioning section;

50-a connection base;

601-hydraulic rod; 602-a telescopic rod; 603-vertical support frames; 604-horizontal support frame; 605-tilt support;

70-connecting pipe sleeve; 701-elastic engagement portion.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.

Example one

Referring to fig. 1 to 5, the present invention discloses a folding arm, which includes a straight tube a101, a straight tube B102, a straight tube C103, and a first lock arm mechanism.

As shown in FIG. 1, the straight tubes A101 and B102 are connected by a jacket type reverse connecting piece 40 in a manner of being rotatable 180 degrees, the straight tubes A101 and B102 can be collinear and parallel by the reverse connecting piece 40, the straight tubes B102 and C103 are connected by a corner connecting piece 30 in a manner of being rotatable 90 degrees, and the straight tubes B102 and C103 can be perpendicular and parallel by the corner connecting piece 30.

As shown in fig. 3 and 4, the first lock arm mechanism includes a fixing member 201, a guiding member 202, a limiting member 203, an elastic member 204, a pulling rope 205 and a plug 206, the fixing member 201 is fixedly installed in the straight pipe C103, the guiding member 202 is installed in the corner connecting member 30, the limiting member 203 is fixedly installed in the straight pipe B102, the elastic member 204 is installed in the straight pipe B102, one end of the elastic member 204 is fixedly connected to the limiting member 203, one end of the plug 206 is abutted against the elastic member 204, one end of the pulling rope 205 is fixedly installed on the fixing member 201, the other end of the pulling rope passes around the surface of the guiding member 202, and is connected to one end of the plug 206 after passing through the limiting member 203; when the straight pipe B102 and the straight pipe C103 are folded from a vertical state to a parallel state, the pull rope 205 is tensioned and stressed to pull the plug pin 206 and compress the elastic element 204, so that the plug pin 206 extends out of the straight pipe A101, and the free rotation of the straight pipe A101 and the straight pipe B102 is realized; when the straight pipes B102 and C103 are unfolded from the parallel state to the vertical state, the pull rope 205 is loosened, the elastic piece 204 resets to push the bolt 206 to be partially inserted into the straight pipe A101, and the fixed connection of the straight pipe A101 and the straight pipe B102 is realized.

In this embodiment, when the straight tube B102 is perpendicular to the straight tube C103, the length of the insertion pin 206 extending into the straight tube a101 is the longest, and the length is smaller than the difference between the longest contact length of the pull rope 205 and the guide 202 and the shortest contact length of the pull rope 205 and the guide 202, so that the insertion pin 206 can achieve the purpose of locking and limiting.

In this embodiment, the fixing member 201 is preferably a rod structure for fixedly penetrating the straight pipe C103, and the limiting member 203 is also a rod structure with a through hole for penetrating the pull rope 205.

In this embodiment, the elastic member 40 is preferably a spring, and the pull cord 205 is preferably a wire rope.

As shown in fig. 5, the reverse connecting member 40 includes a first connecting sleeve 401, a second connecting sleeve 402 and a hinge shaft 403, the first connecting sleeve 401 is sleeved on the outer wall of the straight pipe a101 near the end of the straight pipe B102, the second connecting sleeve 402 is sleeved on the outer wall of the straight pipe B102 near the end of the straight pipe a101, the first connecting sleeve 401 has a first hinge portion 404 extending toward the second connecting sleeve 402, the second connecting sleeve 402 has a second hinge portion 405 extending toward the first connecting sleeve 401, and the second connecting sleeve 402 is connected to the first connecting sleeve 401 through the hinge shaft 403 penetrating through the first hinge portion 404 and the second hinge portion 405.

In this embodiment, the first connection sleeve 401 has a positioning sleeve 406 extending toward the second connection sleeve 402, the second connection sleeve 402 has a positioning portion 407 extending toward the first connection sleeve 401, and the positioning portion 407 can extend into the positioning sleeve 406 as the first connection sleeve 401 rotates relative to the second connection sleeve 402.

In this embodiment, the first hinge 404 and the positioning sleeve 406 are located on the same diameter of the first connecting sleeve 401.

As shown in fig. 5, the corner connecting member 30 includes a first corner portion, a second corner portion and a connecting shaft 305, the first corner portion includes a first inserting pipe 301 and a lower casing 302 vertically disposed at a lower portion of an end surface of the first inserting pipe 301, a free end of the first inserting pipe 301 is inserted and fixedly disposed in the straight pipe C103, the second corner portion includes a second inserting pipe 303 and an upper casing 304 vertically disposed at an upper portion of an end surface of the second inserting pipe 303, the free end of the second inserting pipe 303 is inserted and fixedly disposed in the straight pipe B102, the upper casing 304 and the lower casing 302 are stacked up and down to form a casing with a cylindrical cavity, the connecting shaft 305 movably penetrates through the upper casing 304 and the lower casing 302, an engaging surface of the lower casing 302 has a 90 ° groove 306, and an engaging surface of the upper casing 304 has a protrusion 307 capable of rotating 90 ° in the groove 306.

When the folding arm provided by the embodiment is unfolded, firstly, the straight pipe a101 and the straight pipe B102 are rotated to be collinear, then the straight pipe C103 is rotated or the straight pipe a101 and the straight pipe B102 are simultaneously rotated, so that an included angle of 90 degrees is formed between the straight pipe B102 and the straight pipe C103, in the rotating process, due to the fact that the pull rope 205 is loosened, the elastic piece 204 pushes the bolt 206 to be reset to be partially inserted into the straight pipe a101, and the straight pipe a101 and the straight pipe B102 are fixedly connected, when the folding arm needs to be folded and stored, the straight pipe C103 is rotated or the straight pipe a101 and the straight pipe B102 are simultaneously rotated, so that the straight pipe B102 is parallel to the straight pipe C103, in the rotating process, due to the fact that the pull rope 205 is forced to pull the bolt 206 and compress the elastic piece 204, the bolt 206 extends out of the straight pipe a.

The folding arm can realize locking or unlocking between the straight pipe A101 and the straight pipe B102 by folding the straight pipe B102 and the straight pipe C103, and has the advantages of simple structure, convenience in operation and wide application range.

Example two

As shown in fig. 6 and 7, the present embodiment provides a pi-type rack, which includes two folding arms according to embodiment 1, and further includes a second locking arm structure having the same structure as the first locking arm mechanism, wherein the second locking arm structure and the first locking arm mechanism share the same guide 202, and the second locking arm structure is used for unlocking/locking two straight tubes C103 of the pi-type rack.

In this embodiment, the fixing element 201 in the straight tube C103 has a through hole for passing the second locking arm structure pulling rope 205, and the fixing element 201 in the straight tube B102 has a through hole for passing the first locking arm structure pulling rope 205, so that the pulling rope 205 can be conveniently passed through the through hole, and the pulling rope 205 can be limited by the through hole, thereby preventing the two pulling ropes 205 from crossing each other.

In this embodiment, the guide 202 shared by the second latch arm structure and the first latch arm structure is a double wrap pulley that prevents the pull cord 205 from crossing within the corner connector 30.

EXAMPLE III

As shown in fig. 8, the present embodiment provides a large tent frame that can be quickly folded by a single person, which includes a connection base 50, a first support unit, and a second support unit;

the connection bases 50 are a pair, each connection base 50 having an open cavity; the first support unit comprises n-shaped frames provided by at least the second embodiment, two ends of each n-shaped frame correspondingly extend into two open cavities, the n-shaped frame positioned at the bottom or the n-shaped frame positioned at the top is fixedly connected with the connecting base 50, and the rest n-shaped frames are hinged with the connecting base 50; the second supporting unit comprises two hydraulic rods 601 and at least two telescopic rods 602, two ends of each hydraulic rod 601 are hinged to the n-shaped frame on the uppermost portion and the n-shaped frame on the lowermost portion respectively, and a connection point of the hydraulic rods 601 and the n-shaped frames is close to a hinged end of the n-shaped frames and a hinged end of the connection base 50. The number of the at least two telescopic rods 602 is two, and two ends of the at least two telescopic rods 602 are hinged to the bending part of the pi-shaped frame.

Preferably, when the number of the n-shaped frames is two, one n-shaped frame forms a vertical support frame 603, and the other n-shaped frame forms a horizontal support frame 604; at this time, two telescopic rods 602 are provided, one end of each telescopic rod 602 is connected to a bending portion of the vertical support 603, the other end of each telescopic rod 602 is connected to a bending portion of the horizontal support 604, and the two telescopic rods 602 are arranged in parallel.

As shown in fig. 8, when the number of the n-shaped frames is greater than or equal to three, one of the n-shaped frames forms a vertical support 603, the other one forms a horizontal support 604, and the other n-shaped frames forms an inclined support 605; at this time, the number of the telescopic rods 602 is multiple, and the plurality of telescopic rods 602 are used for supporting two adjacent n-shaped frames.

In this embodiment, in order to facilitate the rapid construction of the tent frame, preferably, the opening of the open cavity of the connection base 50 is arc-shaped, and the central angle of the opening is 90 °, so that the connection base 50 can limit the final forming angle of the vertical support frames 603, and the vertical support frames 603 or the horizontal support frames 604 can be folded rapidly.

In this embodiment, the straight tube B102 is sleeved with the connection pipe sleeve 70, the connection pipe sleeve 70 has an elastic engaging portion 701, and when the tent support is folded, the telescopic rod 602 is partially engaged into the elastic engaging portion 701 to achieve the engaging connection between the telescopic rod 602 and the straight tube B102.

When the large-scale tent support capable of being folded by a single person is built, firstly, the straight pipe A101 and the straight pipe B102 are aligned, the two straight pipes C103 are aligned, and meanwhile, the straight pipe C103 is rotated, so that the two bolts 206 are respectively arranged in the straight pipe B102 and the straight pipe C103, and an n-shaped frame is formed by the same principle. After a plurality of n-shaped frames are formed, the hydraulic rods 601 are opened, one n-shaped frame forms a vertical support frame 603, the other n-shaped frame forms a horizontal support frame 604, and the hydraulic rods 601 form temporary supports.

Then, according to the number and height requirements of the n-shaped frames, the length of the telescopic rod 602 is adjusted to achieve a final structure, in the building process, the telescopic rod 602 can be used for supporting the inclined support frame 605 and the vertical support frame 603, then the hydraulic support frame is used for supporting the vertical support frame 603 and the horizontal support frame 604, and finally the telescopic rod 602 is used for supporting the horizontal support frame 604 and the inclined support frame 605.

The single large-scale tent support that can fold fast that this embodiment provides takes out the tent in accomodating the bag, then opens up, through drawing straight tube C103, but rapid prototyping need not loaded down with trivial details skeleton of putting up, need 30 seconds probably alone and just can put up the tent that family camping that a section is fit for many people and uses.

In the description of the present invention, numerous specific details are set forth, however, it can be appreciated that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the scope of the embodiments of the present invention, and are intended to be covered by the claims and the specification.

Claims (10)

1. A folding arm, characterized in that: the locking mechanism comprises a straight pipe A (101), a straight pipe B (102), a straight pipe C (103) and a first locking arm mechanism, wherein the straight pipe A (101) and the straight pipe B (102) are connected in a manner of being capable of rotating 180 degrees through an outer sleeve type reverse connecting piece (40), and the straight pipe B (102) and the straight pipe C (103) are connected in a manner of being capable of rotating 90 degrees through a corner connecting piece (30);

the first lock arm mechanism comprises a fixing piece (201), a guide piece (202), a limiting piece (203), an elastic piece (204), a pull rope (205) and a bolt (206), wherein the fixing piece (201) is fixedly arranged in a straight pipe C (103), the guide piece (202) is arranged in a corner connecting piece (30), the limiting piece (203) is fixedly arranged in a straight pipe B (102), the elastic piece (204) is arranged in the straight pipe B (102), one end of the elastic piece (204) is fixedly connected to the limiting piece (203), one end of the bolt (206) is abutted to the elastic piece (204), one end of the pull rope (205) is fixedly arranged on the fixing piece (201), the other end of the pull rope bypasses the surface of the guide piece (202), and the pull rope penetrates through the limiting piece (203) and the elastic piece (204) and then is connected with one end of the bolt (206);

when the straight pipe B (102) and the straight pipe C (103) are folded to be in a parallel state from a vertical state, the pull rope (205) is tensioned and stressed to pull the plug pin (206) and compress the elastic element (204), so that the plug pin (206) extends out of the straight pipe A (101), and the straight pipe A (101) and the straight pipe B (102) can rotate freely;

when the straight pipe B (102) and the straight pipe C (103) are unfolded from a parallel state to a vertical state, the pull rope (205) is loosened, the elastic piece (204) resets to push the bolt (206) to be partially inserted into the straight pipe A (101), and the straight pipe A (101) and the straight pipe B (102) are fixedly connected.

2. A folding arm according to claim 1, characterized in that: the reverse connecting piece (40) comprises a first connecting sleeve (401), a second connecting sleeve (402) and a hinge shaft (403), the first connecting sleeve (401) is sleeved on the outer wall of the end part of the straight pipe B (102) close to the straight pipe A (101), the second connecting sleeve (402) is sleeved on the outer wall of the end part of the straight pipe B (102) close to the straight pipe A (101), the first connecting sleeve (401) is provided with a first hinge part (404) extending towards the second connecting sleeve (402), the second connecting sleeve (402) is provided with a second hinge part (405) extending towards the first connecting sleeve (401), and the second connecting sleeve (402) is connected with the first connecting sleeve (401) through the hinge shaft (403) penetrating through the first hinge part (404) and the second hinge part (405).

3. A folding arm according to claim 1, characterized in that: the corner connector (30) comprises a first corner portion, a second corner portion and a connecting shaft (305), the first corner part comprises a first plug pipe (301) and a lower shell (302) vertically arranged at the lower part of one end surface of the first plug pipe (301), the free end of the first inserting pipe (301) is fixedly inserted into the straight pipe C (103), the second corner part comprises a second plug pipe (303) and an upper shell (304) vertically arranged at the upper part of one end surface of the second plug pipe (303), the free end of the second inserting pipe (303) is fixedly inserted into the straight pipe B (102), the upper shell (304) and the lower shell (302) are overlapped up and down to form a shell with a cylindrical cavity, the connecting shaft (305) movably penetrates through the upper shell (304) and the lower shell (302), the abutting surface of the lower shell (302) is provided with a groove (306) with an angle of 90 degrees, and the abutting surface of the upper shell (304) is provided with a bulge (307) capable of rotating for 90 degrees in the groove (306).

4. A pi-shaped frame is characterized in that: comprising two folding arms according to any of claims 1 to 3, further comprising a second locking arm structure identical to the first locking arm mechanism, said second locking arm structure sharing the same guide (202) as the first locking arm mechanism, and the second locking arm structure being adapted to unlock/lock the two straight tubes C (103) of the n-frame.

5. A Π -type holder of claim 4, wherein: the guide (202) shared by the second locking arm structure and the first locking arm mechanism is a double-winding pulley.

6. The utility model provides a single large-scale tent support that can fold fast which characterized in that: it comprises a connecting base (50), a first supporting unit and a second supporting unit;

the connecting bases (50) are in a pair, and each connecting base (50) is provided with an opening cavity;

the first support unit comprises at least two pi-shaped frames according to claim 4, two ends of each pi-shaped frame correspondingly extend into two open cavities, the pi-shaped frame positioned at the bottom or the pi-shaped frame positioned at the top is fixedly connected with a connecting base (50), and the rest pi-shaped frames are hinged with the connecting base (50);

the second supporting unit comprises two hydraulic rods (601) and at least two telescopic rods (602), two ends of each hydraulic rod (601) are hinged to the n-shaped frame at the uppermost part and the n-shaped frame at the lowermost part respectively, and a connecting point of the hydraulic rods (601) and the n-shaped frames is close to a hinged end of the n-shaped frames and a hinged end of the connecting base (50);

the number of the telescopic rods (602) is at least two, and two ends of the at least two telescopic rods (602) are hinged to the bending parts of the n-shaped frame.

7. The large tent frame that can be folded by a single person quickly as claimed in claim 6, wherein:

when the number of the n-shaped frames is two, one n-shaped frame forms a vertical support frame (603), and the other n-shaped frame forms a horizontal support frame (604);

the number of the telescopic rods (602) is two, one end of each telescopic rod (602) is connected with a bending part of the vertical support frame (603), the other end of each telescopic rod (602) is connected with a bending part of the horizontal support frame (604), and the two telescopic rods (602) are arranged in parallel.

8. The large tent frame that can be folded by a single person quickly as claimed in claim 6, wherein:

when the number of the n-shaped frames is more than or equal to three, one n-shaped frame forms a vertical support frame (603), the other n-shaped frame forms a horizontal support frame (604), and the other n-shaped frames form inclined support frames (605);

the telescopic rods (602) are multiple, and the telescopic rods (602) are used for supporting two adjacent n-shaped frames.

9. A large stand for a single person to fold quickly as claimed in claim 7 or 8, wherein: the tent support is characterized in that a connecting pipe sleeve (70) is sleeved outside the straight pipe B (102), the connecting pipe sleeve (70) is provided with an elastic clamping part (701), and when the tent support is folded, the telescopic rod (602) is partially clamped into the elastic clamping part (701) to realize clamping connection of the telescopic rod (602) and the straight pipe B (102).

10. A large stand for a single person to fold quickly as claimed in claim 6 or 7, wherein: the opening of the opening cavity of the connecting base (50) is arc-shaped, and the central angle of the opening is 90 degrees.

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