CN220247912U - PVC folding door - Google Patents

Abstract

The utility model discloses a PVC folding door, which comprises a first door leaf, a second door leaf, a third door leaf, a first door leaf connecting structure and a second door leaf connecting structure; the first door leaf and the second door leaf are connected in a foldable way through a first door leaf connecting structure, and the second door leaf and the third door leaf are connected in a foldable way through a second door leaf connecting structure; the first door leaf connecting structure comprises a first left connecting piece connected with the first door leaf, a first right connecting piece connected with the second door leaf and a first connecting decorative cover; the first left connecting piece and the first right connecting piece are inserted into the first connecting decorative cover and are movably connected; the second door leaf connecting structure comprises a second left connecting piece connected with the second door leaf, a second right connecting piece connected with the third door leaf and a second connecting decorative cover; the second left connecting piece and the second right connecting piece are inserted into the second connecting decorative cover and are movably connected. The folding device adopts the structure, has simple structure and quick installation, and plays a role in linkage folding.

Description

PVC folding door

Technical Field

The utility model relates to the technical field of folding doors, in particular to a screen partition door, namely a PVC folding door.

Background

The folding door is generally composed of a plurality of door leaves, the door leaves are connected in a rotating mode to form a foldable door body, and when the folding door is used, the door leaves can be pushed to one side, so that the folding door has the advantage of small occupied space. The PVC folding door is made of PVC as a main raw material. The PVC folding door has the advantages of light door body, heat preservation, cold and heat insulation, dampproofing, noise reduction, sound insulation, no oil smoke, easy cleaning and difficult color change, so that the PVC folding door can be suitable for various places, and meanwhile, the PVC folding door is very simple and convenient to install and is favored by vast users.

However, in the PVC folding door in the prior art, adjacent door leaves are connected through a connecting strip or a connecting structure with a soft connecting body. Because PVC material feel is fragile, lead to the door leaf width generally less, folding mode is comparatively loaded down with trivial details, and holistic aesthetic measure design is not enough. The hinge and the hinge of the connecting structure can be positioned at the edge position of the door leaf after being installed, and the hinge can be exposed when the folding door is folded, so that the door is not attractive.

In order to solve the above-mentioned existing technical problems, several difficulties need to be overcome: 1, a reinforcing rib structural design of a PVC folding fan. And 2, the width of the PVC folding fan is wider. 3. A folding mode of linkage folding. How to solve the problem of hard strength of the PVC folding door when in use, and how to solve the problem that the opening mode of the PVC folding door is complicated when in use, and the design of products with more attractive design is urgent.

Disclosure of Invention

The utility model aims to disclose a PVC folding door, and solves the problems that the existing PVC folding door connecting structure is complicated in opening mode, generally smaller in door leaf width and not good in overall attractive design when in use.

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

a PVC folding door comprises a first door leaf, a second door leaf, a third door leaf, a first door leaf connecting structure and a second door leaf connecting structure; the first door leaf and the second door leaf are connected in a foldable way through a first door leaf connecting structure, and the second door leaf and the third door leaf are connected in a foldable way through a second door leaf connecting structure;

the first door leaf connecting structure comprises a first left connecting piece connected with the first door leaf, a first right connecting piece connected with the second door leaf and a first connecting decorative cover; the first left connecting piece and the first right connecting piece are inserted into the first connecting decorative cover and are movably connected;

the second door leaf connecting structure comprises a second left connecting piece connected with the second door leaf, a second right connecting piece connected with the third door leaf and a second connecting decorative cover; the second left connecting piece and the second right connecting piece are inserted into the second connecting decorative cover and are movably connected.

Further, the structure of the first left connecting piece and the structure of the first right connecting piece are in mirror symmetry, and the first connecting decorative cover comprises a first horizontal part, a first left vertical part connected with the first horizontal part, a left arc-shaped groove connected with the first left vertical part, a first right vertical part connected with the first horizontal part and a right arc-shaped groove connected with the first right vertical part; a first decorative cover opening is formed between the left arc-shaped groove and the right arc-shaped groove;

the left end of the first left connecting piece is connected with the right end of the first door leaf; the right end of the first left connecting piece is provided with a first left connecting piece inserting hook which is inserted into the first connecting decorative cover from the first decorative cover opening; the inner wall of the first left connecting piece inserting hook is provided with a first circular connecting part, the first circular connecting part is clamped with the left arc-shaped groove, and the first circular connecting part rotates in the left arc-shaped groove;

the right end of the first right connecting piece is connected with the left end of the second door leaf; the left end of the first right connecting piece is provided with a first right connecting piece inserting hook which is inserted into the first connecting decorative cover from the opening of the first decorative cover; the inner wall of the first right connecting piece inserting hook is provided with a second circular connecting part, the second circular connecting part is clamped with the right arc-shaped groove, and the second circular connecting part rotates in the right arc-shaped groove.

Further, the shape of the first circular connecting portion and the shape of the left arc-shaped groove are mutually matched, and the shape of the second circular connecting portion and the shape of the right arc-shaped groove are mutually matched.

Further, the radian M of the left arc-shaped groove is larger than or equal to 185 degrees, and the radian of the left arc-shaped groove is the same as the radian of the right arc-shaped groove; the diameter D1 of the first circular connecting part is 5-8 mm; the second circular connecting part has the same size as the first circular connecting part;

the structure of the first door leaf, the structure of the second door leaf and the structure of the third door leaf are the same, the length L1 of the first door leaf is greater than or equal to 260mm, and reinforcing ribs for reinforcing hardness are arranged in the first door leaf.

Further, a first left connecting piece mortise is formed at the left end of the first left connecting piece, and the first left connecting piece mortise is clamped with the right end of the first door leaf; the right end of the first right connecting piece forms a first right connecting piece mortise, and the first right connecting piece mortise is connected with the left end of the second door leaf in a clamping mode.

Further, the second door fan connecting structure comprises a second left connecting piece, a second right connecting piece and a second connecting decorative cover; the structure of the second left connecting piece is mirror symmetrical with the structure of the second right connecting piece; the second connecting decorative cover comprises a second horizontal part, a left arc tooth connected with the second horizontal part and a right arc tooth connected with the second horizontal part, and a second decorative cover opening is formed between the left arc tooth and the right arc tooth;

the left end of the second left connecting piece is connected with the right end of the second door leaf, the right end of the second left connecting piece forms a second left connecting piece inserting hook, and the second left connecting piece inserting hook is inserted into the second connecting decorative cover from the second decorative cover opening; the inner wall of the second left connecting piece inserting hook is provided with a first meshing tooth which is in meshing fit with the left arc-shaped tooth;

the right end of the second right connecting piece is connected with the left end of the third door leaf in a clamping way, the left end of the second right connecting piece is provided with a second right connecting piece inserting hook, and the second right connecting piece inserting hook is inserted into the second connecting decorative cover from the opening of the second decorative cover; the inner wall of the second right connecting piece inserting hook is provided with a second meshing tooth, and the second meshing tooth is meshed with the right arc-shaped tooth.

Further, a second left connecting piece mortise is formed at the left end of the second left connecting piece, and the second left connecting piece mortise is clamped with the right end of the second door leaf; the right end of the second right connecting piece forms a second right connecting piece mortise, and the second right connecting piece mortise is connected with the left end of the third door leaf in a clamping mode.

Further, the outer wall of the second left connector insert hook forms a left connector notch at one side facing the second right connector insert hook (523), the outer wall of the second right connector insert hook forms a right connector notch at one side facing the second left connector insert hook, and the outer wall width D3 of the second left connector tongue-and-groove is the same as the width D2 of the first door leaf.

Further, an end seal is arranged at the right end of the first door leaf; the end seal is provided with a seal mortice, and the left end of the first door leaf is inserted into the seal mortice and is clamped with the seal mortice.

Further, a handle is arranged at the left end of the third door leaf; the handle is provided with a handle mortise and a bending handle part connected with the handle mortise, and the right end of the third door leaf is inserted into the handle mortise and is clamped with the handle mortise.

Compared with the prior art, the utility model has the beneficial effects that:

1. according to the utility model, the first door leaf connecting structure adopts a mortise-tenon connection mode that a first left connecting piece mortise and a first right connecting piece mortise are realized and the first door leaf and the second door leaf are quickly fastened and installed, and in addition, corresponding screws are used for installation and tightening; the second door fan connecting structure adopts a mortise of a second left connecting piece and a mortise of a second right connecting piece to realize mortise connection with the second door fan and the third door fan through quick fastening, and the second door fan connecting structure is fastened by corresponding screw installation, and has simple structure and quick and convenient installation. The first door leaf, the second door leaf, the third door leaf and the cooperation handle realize that the folding device can be used for achieving the convenience of linkage folding without pushing the folding device one by one. When the folding fan is folded from one end with the handle to one end of the end seal, all the door leaves (namely the first door leaf, the second door leaf and the third door leaf) can be gradually closed together along with the continuous pushing of the handle, and the linkage folding effect is achieved.

2. The second door fan connecting structure adopts the structure of the left connecting piece notch and the right connecting piece notch, and prevents the interference phenomenon from occurring when the second left connecting piece and the second right connecting piece rotate.

2. The first door leaf, the second door leaf, the third door leaf, the first door leaf connecting structure and the second door leaf connecting structure are made of PVC materials, so that the folding device has the convenience of linkage folding in use and does not need to push and fold one leaf by one leaf. When the folding fan is folded from one end with the handle to one end of the end seal, all door leaves (namely the first door leaf 1, the second door leaf 2 and the third door leaf 3) can be gradually closed together along with the continuous pushing of the handle, the linkage folding effect is achieved, and 5, the structural design of the handle is adopted to fuse the structure of the folding blade, so that the overall attractiveness is improved.

3. The utility model adopts the structure that the length L1 of the door leaf is more than or equal to 260mm, the width is increased, and meanwhile, the inside is designed with the reinforcing rib for reinforcing the hard strength, so that the appearance is more attractive, practical and high in strength.

4. By adopting the structure, the PVC folding blade has better rigidity; the width of the door leaf is wider, the folding blades contained in the whole door leaf can be better, and the effect of more beautiful appearance is achieved; the folding mode of linkage folding is adopted, so that the folding type folding device is more rapid and convenient to push and use. The structure of the folding fan is integrated with the structural designs such as the handle, and the like, so that the folding fan has better overall aesthetic property and is convenient to assemble. Each door leaf is independent and complete, and the installation of an actual product is convenient and rapid and saves time.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort to a person skilled in the art.

FIG. 1 is a schematic front view of an embodiment of a PVC folding door of the present utility model with the door leaf deployed;

FIG. 2 is a schematic longitudinal section along A-A of FIG. 1;

FIG. 3 is an enlarged schematic view of the portion B of FIG. 2;

FIG. 4 is an enlarged schematic view of portion C of FIG. 2;

FIG. 5 is a schematic view of the first connecting decorative cover of FIG. 4;

FIG. 6 is a schematic view of the first left connector of FIG. 4;

FIG. 7 is a schematic view of the first right connector of FIG. 4;

FIG. 8 is an enlarged schematic view of the portion D of FIG. 2;

FIG. 9 is a schematic view of the second attachment trim cover of FIG. 8;

FIG. 10 is a schematic view of the second left connector of FIG. 8;

FIG. 11 is a schematic view of the second right connection of FIG. 8;

FIG. 12 is an enlarged schematic view of the portion E of FIG. 2;

FIG. 13 is a schematic view of the folded state of the embodiment of FIG. 1;

FIG. 14 is an enlarged schematic view of portion F of FIG. 13;

in the figure, 100, PVC folding door; 1. a first door leaf; 11. reinforcing ribs; 2. a second door leaf; 3. a third door leaf;

4. a first door leaf connecting structure; 41. a first left connecting piece; 411. a first circular connecting portion; 412. a first left connector tongue and groove; 413. a first left connector insert hook; 42. a first right connector; 421. a second circular connecting portion; 422. a first right connector tongue and groove; 423. a first right connector insert hook; 43. a first connection decorative cover; 431. a first horizontal portion; 432. a first left vertical portion; 433. a left arc-shaped groove; 434. a first right vertical portion; 435. a right arc-shaped groove; 436. a first decorative cover opening;

5. a second door leaf connecting structure; 51. a second left connecting piece; 511. a first engagement tooth; 512. a second left connector tongue and groove; 513. a second left connector plug hook; 514. left connector cutout; 52. a second right connector; 521. a second meshing tooth; 522. a second right connector tongue and groove; 523. a second right connector plug hook; 524. a right connector cutout; 53. a second connecting decorative cover; 531. a second horizontal portion; 532. left arc teeth; 533. right arc teeth; 534. a second decorative cover opening;

6. an end seal; 61. a seal tongue groove; 62. a seal insulating cavity;

7. a handle; 71. a handle mortise; 72. a handle insulating cavity; 73. the handle portion is bent.

Detailed Description

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances. The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature. The terms "vertical," "horizontal," "left," "right," "up," "down," and the like are used for descriptive purposes only and are not to indicate or imply that the devices or elements being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the utility model.

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.

A PVC folding door 100, as shown in the embodiment of fig. 1 to 14, comprises a first door leaf 1, a second door leaf 2, a third door leaf 3, a first door leaf connecting structure 4, a second door leaf connecting structure 5. The first door leaf 1 and the second door leaf 2 are connected in a folding way through a first door leaf connecting structure 4, and the second door leaf 2 and the third door leaf 3 are connected in a folding way through a second door leaf connecting structure 5, so that the first door leaf 1, the second door leaf 2 and the third door leaf 3 are connected in a folding way. The first door 1, the second door 2 and the third door 3 have the same structure. The length L1 of the first door leaf 1 is 260mm or more, preferably 264.6mm, and the inside of the first door leaf 1 is provided with a reinforcing rib 11 for reinforcing the hard strength.

As shown in fig. 4 to 7, the first door leaf connecting structure 4 includes a first left connecting piece 41 connecting the first door leaf 1, a first right connecting piece 42 connecting the second door leaf 2, and a first connecting decorative cover 43 into which the first left connecting piece and the first right connecting piece are inserted and movably connected. The structure of the first left connecting piece 41 and the structure of the first right connecting piece 42 are mirror images. The first left connecting piece 41, the first right connecting piece 42, and the first connecting decorative cover 43 are respectively integrally formed as a unitary structure. The first connection decorative cover 43 has a symmetrical cross section, and the first connection decorative cover 43 includes a first horizontal portion 431, a first left vertical portion 432 connected to the first horizontal portion 431, a left arc-shaped groove 433 connected to the first left vertical portion 432, a first right vertical portion 434 connected to the first horizontal portion 431, and a right arc-shaped groove 435 connected to the first right vertical portion 434. A first decorative cover opening 436 is formed between the left arcuate slot 433 and the right arcuate slot 435. The left end of the first left connector 41 forms a first left connector mortise 412, and the first left connector mortise 412 is clamped with the right end of the first door leaf 1. The right end of the first left link 41 is formed with a first left link insertion hook 413, and the first left link insertion hook 413 is inserted into the first link decorative cover 43 from the first decorative cover opening 436; the inner wall of the first left connector inserting hook 413 is of a U-shaped groove structure, the inner wall of the first left connector inserting hook 413 is provided with a first circular connecting portion 411, the first circular connecting portion 411 is clamped with the left arc-shaped groove 433, and the first circular connecting portion 411 rotates in the left arc-shaped groove 433. The right end of the first right link 42 is formed with a first right link mortise 422, the first right link mortise 422 is engaged with the left end of the second door 2, the left end of the first right link 42 is formed with a first right link insert hook 423, and the first right link insert hook 423 is inserted into the first link trim cover 43 from the first trim cover opening 436. The inner wall of the first right connector inserting hook 423 is of a U-shaped groove structure, the inner wall of the first right connector inserting hook 423 is provided with a second circular connecting portion 421, the second circular connecting portion 421 is clamped with the right arc-shaped groove 435, and the second circular connecting portion 421 rotates in the right arc-shaped groove 435. The shape of the first circular connecting portion 411 and the shape of the left arc-shaped groove 433 are matched with each other, and the shape of the second circular connecting portion 421 and the shape of the right arc-shaped groove 435 are matched with each other. The arc M of the left arcuate slot 433 is greater than or equal to 185 deg., preferably 197 deg.. The arc of the left arc-shaped slot 433 is the same as the arc of the right arc-shaped slot 435. The diameter D1 of the first circular connecting portion 411 is 5 to 8mm, preferably 6.5mm; the second circular connection 421 has the same size as the first circular connection 411. The width D2 of the outer wall of the first left joint tongue-and-groove 412 is the same as the width D2 of the first door leaf 1. The first door leaf connecting structure 4 adopts a mortise and tenon connection mode that the first left connecting piece mortise 412 and the first right connecting piece mortise 422 are used for realizing quick fastening installation with the first door leaf 1 and the second door leaf 2, and in addition, the first door leaf and the second door leaf are fastened by corresponding screw installation.

As shown in fig. 8 to 11, the second door leaf connecting structure 5 includes a second left connecting piece 51 connecting the second door leaf, a second right connecting piece 52 connecting the third door leaf, and a second connecting decorative cover 53. The second left connecting piece 51 and the second right connecting piece 52 are inserted into the second connecting decorative cover and movably connected. The structure of the second left connecting piece 51 and the structure of the second right connecting piece 52 are mirror symmetrical. The second left connecting piece 51, the second right connecting piece 52 and the second connecting decorative cover 53 are respectively integrally formed as a unitary structure. The second connection decorative cover 53 has a symmetrical cross section, and the second connection decorative cover 53 includes a second horizontal portion 531, a left arc tooth 532 connected to the second horizontal portion 531, and a right arc tooth 533 connected to the second horizontal portion 531. A second decorative cover opening 534 is formed between the left arcuate tooth 532 and the right arcuate tooth 533. The left end of the second left connector 51 forms a second left connector mortise 512, and the second left connector mortise 512 is snapped into the right end of the second door 2. The right end of the second left link 51 is formed with a second left link insertion hook 513, and the second left link insertion hook 513 is inserted into the second link decorative cover 53 from the second decorative cover opening 534; the inner wall of the second left connector hook 513 is provided with a first engagement tooth 511, and the first engagement tooth 511 and the left arc-shaped tooth 532 are engaged. The right end of the second right connector 52 forms a second right connector mortise 522, the second right connector mortise 522 is clamped with the left end of the third door leaf 3, the left end of the second right connector 52 forms a second right connector insertion hook 523, and the second right connector insertion hook 523 is inserted into the second connection decorative cover 53 from the second decorative cover opening 534. The inner wall of the second right connector catch 523 is provided with a second engagement tooth 521, and the second engagement tooth 521 is engaged with the right arc-shaped tooth 533. The outer wall of the second left connector insertion hook 513 forms a left connector cutout 514 on a side facing the second right connector insertion hook 523, and the outer wall of the second right connector insertion hook 523 forms a right connector cutout 524 on a side facing the second left connector insertion hook 513, and this embodiment adopts the structure of the left connector cutout 514 and the right connector cutout 524 to prevent the interference phenomenon from occurring when the second left connector 51 and the second right connector 52 relatively rotate. The width D3 of the outer wall of the second left joint tongue-and-groove 512 is the same as the width D2 of the first door leaf 1. The second door leaf connecting structure 5 adopts a second left connecting piece mortise 512 and a second right connecting piece mortise 522 to realize a mortise-tenon connection mode of quick fastening installation with the second door leaf 2 and the third door leaf 3, and in addition, the second door leaf is fastened by corresponding screw installation.

As shown in fig. 2, the right end of the first door leaf 1 is provided with an end seal 6. The end seal 6 is provided with a seal mortice 61, and the left end of the first door leaf 1 is inserted into the seal mortice 61 and is clamped with the seal mortice 61. The seal 6 is also provided with a seal heat insulation cavity 62 for heat insulation. The outer wall of the end seal 6 is flush with the outer wall of the first door leaf 1. As shown in fig. 12, the left end of the third door leaf 3 is provided with a handle 7. The handle 7 is provided with a handle mortise 71, and the right end of the third door leaf 3 is inserted into the handle mortise 71 and is clamped with the handle mortise 71. The handle 7 is also internally provided with a handle heat insulation cavity 72 for heat insulation and preservation. The outer wall of the handle 7 is flush with the outer wall of the third door leaf 3. The handle 7 is also provided with a bent handle portion 73. The bending handle 73 is provided on one side of the handle heat insulation chamber 72. The end seal 6 and the handle 7 are adopted in the embodiment, so that the whole product has stronger attractive appearance and integrity and is attractive and concise; and simultaneously, the installation convenience is improved. The handle 7 adopts the bending handle part 73 with a bending shape, so that the buckling folding fan can be directly and quickly installed, and the complexity of screwing is reduced.

In this embodiment, the first door leaf 1, the second door leaf 2, the third door leaf 3, the first door leaf connection structure 4, the second door leaf connection structure 5 adopt PVC material to make this embodiment play the convenience of linkage folding when using, do not need one fan to promote folding. When the folding fan of the embodiment is folded from the end with the handle 7 to the end of the end seal 6, all the door leaves (i.e. the first door leaf 1, the second door leaf 2 and the third door leaf 3) gradually draw together along with the continuous pushing of the handle 7, so as to achieve the effect of linkage folding, as shown in fig. 7.

Other structures of this embodiment are seen in the prior art.

As a further explanation of the present utility model, the embodiments of the present utility model and the technical features in the embodiments may be combined with each other without conflict. The present utility model is not limited to the above-described embodiments, but, if various modifications or variations of the present utility model are not departing from the spirit and scope of the present utility model, the present utility model is intended to include such modifications and variations as fall within the scope of the claims and the equivalents thereof.

Claims (10)

1. A PVC folding door, characterized in that: comprises a first door leaf (1), a second door leaf (2), a third door leaf (3), a first door leaf connecting structure (4) and a second door leaf connecting structure (5); the first door leaf and the second door leaf are connected in a foldable way through a first door leaf connecting structure, and the second door leaf and the third door leaf are connected in a foldable way through a second door leaf connecting structure;

the first door leaf connecting structure comprises a first left connecting piece (41) connected with the first door leaf, a first right connecting piece (42) connected with the second door leaf and a first connecting decorative cover (43); the first left connecting piece and the first right connecting piece are inserted into the first connecting decorative cover and are movably connected;

the second door leaf connecting structure comprises a second left connecting piece (51) connected with the second door leaf, a second right connecting piece (52) connected with the third door leaf and a second connecting decorative cover (53); the second left connecting piece and the second right connecting piece (52) are inserted into the second connecting decorative cover and are movably connected.

2. A PVC folding door as in claim 1, wherein: the structure of the first left connecting piece (41) and the structure of the first right connecting piece (42) are in mirror symmetry, and the first connecting decorative cover comprises a first horizontal part (431), a first left vertical part (432) connected with the first horizontal part, a left arc-shaped groove (433) connected with the first left vertical part, a first right vertical part (434) connected with the first horizontal part and a right arc-shaped groove (435) connected with the first right vertical part; a first decorative cover opening (436) is formed between the left arc-shaped groove and the right arc-shaped groove;

the left end of the first left connecting piece is connected with the right end of the first door leaf (1); the right end of the first left connecting piece is provided with a first left connecting piece inserting hook (413), and the first left connecting piece inserting hook is inserted into the first connecting decorative cover from the first decorative cover opening; the inner wall of the first left connecting piece inserting hook is provided with a first circular connecting part (411), the first circular connecting part is clamped with the left arc-shaped groove, and the first circular connecting part rotates in the left arc-shaped groove;

the right end of the first right connecting piece is connected with the left end of the second door leaf (2); the left end of the first right connecting piece is provided with a first right connecting piece inserting hook (423), and the first right connecting piece inserting hook is inserted into the first connecting decorative cover from the first decorative cover opening; the inner wall of the first right connecting piece inserting hook is provided with a second circular connecting part (421), the second circular connecting part is clamped with the right arc-shaped groove, and the second circular connecting part rotates in the right arc-shaped groove.

3. A PVC folding door as in claim 2, wherein: the shape of the first circular connecting part (411) and the shape of the left arc-shaped groove (433) are matched with each other, and the shape of the second circular connecting part (421) and the shape of the right arc-shaped groove (435) are matched with each other.

4. A PVC folding door according to claim 3, wherein: the radian M of the left arc-shaped groove (433) is larger than or equal to 185 degrees, and the radian of the left arc-shaped groove is the same as the radian of the right arc-shaped groove (435); the diameter D1 of the first circular connecting part (411) is 5-8 mm; the second circular connecting part (421) has the same size as the first circular connecting part;

the structure of the first door leaf (1), the structure of the second door leaf (2) and the structure of the third door leaf (3) are the same, the length L1 of the first door leaf is greater than or equal to 260mm, and a reinforcing rib (11) for reinforcing hardness is arranged in the first door leaf.

5. A PVC folding door according to any of claims 2 to 4, wherein: the left end of the first left connecting piece (41) is provided with a first left connecting piece mortise (412), and the first left connecting piece mortise is clamped with the right end of the first door leaf (1); the right end of the first right connecting piece (42) is provided with a first right connecting piece mortise (422), and the first right connecting piece mortise is clamped with the left end of the second door fan (2).

6. A PVC folding door as in claim 2, wherein: the second door leaf connecting structure (5) comprises a second left connecting piece (51), a second right connecting piece (52) and a second connecting decorative cover (53); the structure of the second left connecting piece is mirror symmetrical with the structure of the second right connecting piece; the second connecting decorative cover comprises a second horizontal part (531), a left arc tooth (532) connected with the second horizontal part and a right arc tooth (533) connected with the second horizontal part, and a second decorative cover opening (534) is formed between the left arc tooth and the right arc tooth;

the left end of the second left connecting piece is connected with the right end of the second door leaf (2), the right end of the second left connecting piece is provided with a second left connecting piece inserting hook (513), and the second left connecting piece inserting hook is inserted into the second connecting decorative cover from the second decorative cover opening; the inner wall of the second left connecting piece inserting hook is provided with a first meshing tooth (511), and the first meshing tooth is in meshing fit with the left arc-shaped tooth;

the right end of the second right connecting piece is connected with the left end of the third door leaf (3) in a clamping way, the left end of the second right connecting piece forms a second right connecting piece inserting hook (523), and the second right connecting piece inserting hook is inserted into the second connecting decorative cover from the second decorative cover opening; the inner wall of the second right connector inserting hook is provided with a second meshing tooth (521), and the second meshing tooth is in meshing fit with the right arc-shaped tooth.

7. The PVC folding door of claim 6, wherein: the left end of the second left connecting piece (51) is provided with a second left connecting piece mortise (512), and the second left connecting piece mortise is clamped with the right end of the second door fan (2); the right end of the second right connecting piece (52) is provided with a second right connecting piece mortise (522), and the second right connecting piece mortise is clamped with the left end of the third door leaf (3).

8. A PVC folding door according to claim 6 or 7, wherein: the outer wall of the second left connector inserting hook (513) forms a left connector notch (514) on the surface facing the second right connector inserting hook (523), the outer wall of the second right connector inserting hook forms a right connector notch (524) on the surface facing the second left connector inserting hook, and the width D3 of the outer wall of the second left connector mortice is the same as the width D2 of the first door leaf (1).

9. A PVC folding door as in claim 1, wherein: an end seal (6) is arranged at the right end of the first door leaf (1); the end seal is provided with a seal mortice (61), and the left end of the first door leaf (1) is inserted into the seal mortice and is clamped with the seal mortice.

10. A PVC folding door according to claim 1 or 9, wherein: a handle (7) is arranged at the left end of the third door leaf (3); the handle is provided with a handle mortise (71) and a bending handle part (73) connected with the handle mortise, and the right end of the third door leaf (3) is inserted into the handle mortise and is clamped with the handle mortise.