CN221096209U

CN221096209U - Hinge structure of folding door and folding door

Info

Publication number: CN221096209U
Application number: CN202321020749.3U
Authority: CN
Inventors: 许姜德
Original assignee: Guangdong OPK Smart Home Technology Co Ltd
Current assignee: Guangdong OPK Smart Home Technology Co Ltd
Priority date: 2023-04-28
Filing date: 2023-04-28
Publication date: 2024-06-07
Anticipated expiration: 2033-04-28

Abstract

The utility model relates to the field of door and window processing, and particularly discloses a folding door hinge structure which is arranged at the end part of a door leaf to connect and fold adjacent door leaves. A folding door is provided with the folding door hinge structure. The folding door hinge structure is simple in structure, and the folding door hinge structure is arranged at the end part of the door leaf, so that the movement process of the folding door hinge structure is well combined with the movement of the end part of the door leaf, and the folding door hinge structure is not easy to catch by human vision, so that the whole folding door is more attractive.

Description

Hinge structure of folding door and folding door

Technical Field

The utility model relates to the field of door and window processing, in particular to a hinge structure of a folding door and the folding door.

Background

Currently, in order to achieve the overall linkage effect of the door leaves, hinges are required to be arranged at the middle positions of the door leaves to install and fix, however, the hinges can achieve the effect of stabilizing the door leaves and linkage the door leaves, but poor visual and organoleptic effects can be given to people due to the fact that the hinges are arranged in visual areas between the door leaves.

Disclosure of utility model

In order to solve the above-mentioned problems of the prior art, it is an object of the present utility model to provide a hinge structure for a folding door, which is used for connecting door leaves and is disposed at a side of the door leaves close to a track, so that a visual sense effect is good for people.

The technical scheme adopted for solving the technical problems is as follows: the folding door hinge structure is used for being arranged at the end parts of two door leaves and comprises an opening and closing piece and a first connecting piece which is arranged at one end of the opening and closing piece and is movably connected with the opening and closing piece, wherein the first connecting piece is used for being connected with the end part of an upper frame or a lower frame of one door leaf; and the second connecting piece is arranged at the other end of the opening and closing piece and is movably connected with the opening and closing piece, and the second connecting piece is used for being connected with the end part of the upper frame or the lower frame of the other door leaf. On the basis of the structure, the hinge structure is arranged at the end parts of the upper frame and the lower frame of the door leaf, but not at the middle part of the door leaf, so that the structure is not easy to catch by human vision, and meanwhile, the opening and closing movement of the opening and closing piece and the opening and closing movement of the two door leaves are well combined, so that the movement process is not obvious, and therefore, the hinge structure can improve the overall aesthetic degree of the folded door leaf, and has good visual sense effect for people.

According to some embodiments of the present utility model, the opening and closing member is configured to drive the first connecting member and the second connecting member to perform an opening-closing motion, and when the opening and closing member is in an open state, the two connecting members are opened and on the same straight line, so that the opening and closing member is received at ends of the upper frame or the lower frame on the same side of the two door pages, so that the two door pages are opened; when the opening and closing piece is in a closed state, the two connecting pieces are in a closed state and are flush with the end parts of the upper frame or the lower frame of the two door leaves, so that the two door leaves are folded.

According to some embodiments of the present utility model, the opening and closing member includes a first rotating member and a second rotating member, the first rotating member and the second rotating member are hinged, the first rotating member is movably assembled to the first connecting member, the second rotating member is movably assembled to the second connecting member, when the two connecting members are in an open state, a part of the first rotating member extends out of the first connecting member, and a part of the second rotating member extends out of the second connecting member, so that the two door leaves are folded; when the two connecting pieces are in a closed state, the first connecting piece is connected with the second connecting piece, so that the first rotating piece and the second rotating piece are completely contained at the end parts of the upper frame or the lower frame of the two door leaves, and the door leaves are opened at the same time. The opening and closing piece specifically completes opening and closing movement through the mutual matching of the first rotating piece and the second rotating piece, so that the door leaf can be opened or closed.

According to some embodiments of the utility model, the first connector is provided with a first guide groove and the second connector is provided with a second guide groove; one end of the first rotating piece is provided with a first guide block, the first guide block is in sliding connection with the first guide groove, and the other end of the first rotating piece is fixedly connected with the second connecting piece; one end of the second rotating piece is provided with a second guide block, the second guide block is in sliding connection with the second guide groove, and the other end of the second rotating piece is fixedly connected with the first connecting piece; when the first connecting piece and the second connecting piece are in an open state, the first guide block is abutted to one end of the first guide groove, and the second guide block is abutted to one end of the second guide groove; when the first connecting piece and the second connecting piece are in a closed state, the first guide block is abutted against the other end of the first guide groove, and the second guide block is abutted against the other end of the second guide groove. On the basis of the structure, the guide blocks of the connecting piece are matched with the guide grooves to move mutually so as to realize the opening and closing of the hinge structure, and the moving process of the hinge structure is more concealed.

According to some embodiments of the utility model, the opening and closing member further comprises a cooperative member, and the cooperative member sequentially penetrates through the first rotating member and the second rotating member, and the cooperative member enables the movement process of the first rotating member and the movement process of the second rotating member to be kept synchronous. The cooperative parts are arranged so that the mutual rotation of the first rotating part and the second rotating part is kept synchronous and stable, and the cooperative parts also play a role in limiting the rotation angle of the first rotating part and the second rotating part.

According to some embodiments of the utility model, the first rotating member rotates around a first rotating shaft, the first rotating shaft is arranged on the second connecting member, the second rotating member rotates around a second rotating shaft, the second rotating shaft is arranged on the first connecting member, the first rotating member is further provided with a groove, the second rotating member is partially arranged in the groove, and the cooperative member enables the rotation of the first rotating shaft and the rotation of the second rotating shaft to be kept synchronous. On the basis of the structure, the rotating shaft is matched with the cooperative piece to synchronously combine the opening and closing movement of the connecting piece and the rotating movement of the rotating piece, so that the movement of the integral hinge structure is more coordinated and synchronous. The whole volume of the hinge structure is smaller due to the arrangement of the grooves, the movement range of the hinge is controlled in a smaller space, and the hinge structure is conveniently installed in a narrower space.

According to some embodiments of the utility model, the first connecting piece is further provided with a buffer piece, and when the two connecting pieces are switched from the open state to the closed state, the buffer piece abuts against the first rotating piece to play a role of buffering. The buffer piece mainly enables the hinge structure to bear the violent push-pull action of a user, the service life of the hinge structure is prolonged, and meanwhile, the opening and closing process of the hinge is light, smooth and low in noise.

According to some embodiments of the utility model, the second rotating member is further provided with a protrusion, the second connecting member is further provided with a resetting member, one end of the resetting member is connected with the protrusion, and the other end of the resetting member is fixedly arranged on the second connecting member. The adoption of the reset piece is beneficial to the rotation reduction of the hinge structure and saves more labor.

The second object of the present utility model is to provide a folding door, which has the above folding door hinge structure, further comprising a door frame, at least two door leaves arranged in the door frame, and the adjacent two door leaves are connected with the ends of the section bar through the folding door hinge structure. On the basis of the structure, the folding door hinge structure is arranged at the end part of the door leaf section bar, so that the folding door hinge structure is not easy to be captured by human vision.

According to some embodiments of the utility model, the folding door further comprises a pulley block connected with the door leaves, the door frame is paved with a guide rail, the pulley block runs in the guide rail, the pulley block is connected with the hinge structure of the folding door, the pulley block is provided with a connecting rod, and the connecting rod is inserted into the cooperative piece, so that the adjacent two door leaves can be folded synchronously in the sliding process under the action of external force. The connecting rod and the cooperative piece cooperate to ensure that the connection stability between the pulley block and the hinge structure is higher, and the sliding of the folding door and the folding movement process of the folding door are synchronously completed.

In summary, compared with the hinge structure of the folding door and the folding door in the prior art, the application has the following advantages:

1. the folding door hinge structure is arranged at the end parts of the upper frame and the lower frame of the door leaf, so that the folding door hinge structure is not easy to be caught by human vision.

2. The hinge structure of the folding door realizes the good combination of the specific rotation movement and the folding and unfolding movement of the door leaf, so that the movement becomes unobvious, and the folding door adopting the hinge structure is more attractive and has simpler visual effect.

3. The hinge structure of the folding door adopts the buffer piece, so that the folding door can be propped against a user to open and close the hinge structure more violently, and the folding door is changed into soft, thus the service lives of the hinge structure and the folding door can be prolonged, and the folding door is not easy to clamp.

4. The hinge structure of the folding door adopts the reset piece, so that the opening process of the hinge structure is more labor-saving, and a user has better use experience in the process of using the folding door.

5. The folding door hinge structure occupies small space, is favorable for the hinge structure to be used in a narrower space, and expands the application range.

6. The folding door adopts the hinge structure of the folding door, so that the door page of the folding door has better and more concise effect.

7. And part of door pages of the folding door are matched with the cooperative parts by adopting connecting rods of pulley blocks, so that the sliding and folding movement processes of the folding door are synchronously completed.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following description will make brief description of the drawings used in the description of the embodiments or the prior art. Like elements or portions are generally identified by like reference numerals throughout the several figures. In the drawings, elements or portions thereof are not necessarily drawn to scale.

FIG. 1 is a schematic view of a hinge structure of a folding door according to the present utility model;

FIG. 2 is a schematic view of a hinge structure of a folding door according to the present utility model (in a closed state);

FIG. 3 is another schematic view of a hinge structure of a folding door according to the present utility model (in an unfolded state);

FIG. 4 is a schematic view of the internal structure of the hinge structure of the folding door of the present utility model (in a closed state);

FIG. 5 is a schematic view of still another internal structure of the hinge structure of the folding door of the present utility model (in an unfolded state);

FIG. 6 is a schematic view showing a split structure of a hinge structure of a folding door according to the present utility model;

FIG. 7 is a schematic view of a hinge structure assembly pulley block for a folding door according to the present utility model;

FIG. 8 is a schematic view of the structure of the folding door of the present utility model (in a folded state);

FIG. 9 is a schematic view of yet another construction of the folding door of the present utility model (in an open state);

Fig. 10 is an installation schematic view of a hinge structure of a folding door in the present utility model.

Drawing and annotating: 1-first connecting piece, 11-first accommodating cavity, 12-first guide groove, 13-first guide block, 14-buffer piece, 141-first bearing, 142-telescopic rod, 2-second connecting piece, 21-second accommodating cavity, 22-second guide groove, 23-second guide block, 24-reset parts, 3-first rotating parts, 31-grooves, 32-first rotating shafts, 4-second rotating parts, 41-protrusions, 42-second rotating shafts, 5-cooperative parts, 6-folding door hinge structures, 7-door pages, 8-pulley blocks, 81-connecting rods, 9-guide rails, 10-door frames and 15-opening and closing parts.

Detailed Description

For a better understanding and implementation of the present utility model, a detailed, clear and complete description of embodiments of the technical solution of the present utility model will be given below with reference to the accompanying drawings. The following examples are only for more clearly and completely describing the technical solution of the present utility model, and thus are only exemplary and should not be construed to limit the scope of the present utility model.

It is noted that unless otherwise indicated, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this utility model belongs. The terms "upper," "lower," "front," "rear," "left," "right," "horizontal," "top," "bottom," "inner," "outer," and the like are used for convenience in describing and simplifying the description of the present utility model based on the orientation or positional relationship shown in the drawings, and do not denote or imply that the devices or elements 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 utility model.

The following describes a folding door hinge structure according to an embodiment of the present utility model with reference to fig. 1 to 6, which may be disposed at an end of an upper frame or a lower frame of a door leaf according to a requirement of use.

Referring first to fig. 1-3, a folding door hinge structure 6 is shown, and in combination with the installation schematic diagram of the folding door hinge structure 6 shown in fig. 10, is configured at the end of the upper frame of two door leaves 7 for connecting and folding two adjacent door leaves 7. The door leaf opening and closing device comprises an opening and closing piece 15, and a first connecting piece 1 and a second connecting piece 2 which are connected with the opening and closing piece 15, wherein the first connecting piece 1 is used for being connected with the upper frame end part of one door leaf, the second connecting piece is used for being connected with the upper frame end part of the other door leaf, and the opening and closing piece 15 is used for driving the first connecting piece 1 and the second connecting piece 2 to perform opening-closing movement so as to further realize opening or closing of the two door leaves. On the basis of the above structure, the folding door hinge structure 6 is arranged at the end part of the upper frame of the door leaf, and compared with the visual obvious area arranged in the middle of the door leaf in the prior art, the folding door hinge structure is less prone to being captured by human visual sense, and further the visual attractive effect of the hinge structure 6 after installation is improved.

Specifically, as shown in fig. 10, in this embodiment, the folding door hinge structure 6 is disposed at the upper frame beam of the door leaf, in other embodiments, it may also be disposed at the end of the lower frame beam of the door leaf, and further, the folding door hinge structure 6 is respectively fixed at the end of the upper frame or the lower frame beam of the door leaf by plugging through the first connecting member 1 and the second connecting member 2.

With continued reference to fig. 1-3, the opening and closing member 15 specifically includes a first rotating member 3, a second rotating member 4 hinged to the first rotating member 3, and a cooperating member 5, where the cooperating member 5 sequentially passes through the first rotating member 3 and the second rotating member 4, and plays a role in synchronizing rotation of the first rotating member 3 and the second rotating member 4, the first rotating member 3 is movably disposed on the first connecting member 1, the second rotating member 4 is movably disposed on the second connecting member 2, and the first connecting member 1 and the second connecting member are respectively connected with a door leaf 7, so that when an external force is applied to push one of the door leaves 7, the external force drives the opening and closing member 15 to perform an opening or closing motion through one of the first connecting member and the second connecting member, thereby realizing folding and opening motions between the door leaves 7. As shown in fig. 3, when the opening and closing member 15 is in an opened state, the two connecting members are opened and connected on the same straight line for accommodating the opening and closing member 15 at the upper frame ends of the two door pages; as shown in fig. 2, when the opening and closing member 15 is in the closed state, the two connecting members are in the closed state, so as to be used for being flush with the upper frame ends of the two door pages. On the basis of the structure, the opening and closing piece cooperates with the movement of the two connecting pieces to realize the opening and closing of the folding door hinge structure 6, and the movement of the door leaf and the movement of the opening and closing piece are combined together, so that the visual effect is good.

Specifically, as shown in fig. 4 and 5, the internal structure diagram of the hinge structure 6 of the folding door is that the first connecting piece 1 is provided with a first guiding groove 12 and a buffer piece 14, one end of the first rotating piece 3 is provided with a first guiding block 13, the first guiding block 13 is slidingly connected with the first guiding groove 12, the other end of the first rotating piece 3 is provided with a first rotating shaft 32, the first rotating shaft 32 is arranged on the second connecting piece 2 and is rotationally connected with the second connecting piece 2, the buffer piece 14 is abutted on the moving path of the first rotating piece 3, and the buffer piece 14 is clamped and fixed in an internal groove 31 of the first connecting piece 1; a second guide groove 22 and a resetting piece 24 are arranged in the second connecting piece 2; one end of the second rotating member 4 is provided with a second guide block 23 and a protrusion 41, the second guide block 23 is slidably connected with the second guide groove 22, the other end of the second rotating member 4 is provided with a second rotating shaft 42, the second rotating shaft 42 is arranged on the first connecting member 1 and is rotationally connected with the first connecting member 1, one end of the resetting member 24 is connected with the protrusion 41, and the other end of the resetting member 24 is fixedly connected with the protrusion 41 arranged in the second connecting member 2.

As shown in fig. 5, when the hinge structure is in the fully opened state, the first and second links 1 and 2 are opened and aligned, the first guide block 13 abuts against one end of the first guide groove 12, and the second guide block 23 abuts against one end of the second guide groove 22, and at this time, the first and second rotating members 3 and 4 are not visible in the human visual area. When the first connecting piece 1 and the second connecting piece 2 are in the open state, the resetting piece 24 is in a compressed energy storage state, and one end of the buffer piece 14 is separated from the first rotating piece 3 at the moment; when the hinge gradually changes from the open state to the closed state, under the action of external force, the reset piece 24 can undergo the change of the compression state to the tension state, the reset piece 24 can release elastic potential energy and store the elastic potential energy again, the buffer piece 14 is abutted with the first rotating piece 3, and the larger impact force in the process is counteracted through the internal structure of the buffer piece 14. As shown in fig. 4, when the hinge is in the fully closed state, the length extending direction of the reset member 24, the length extending direction of the second connecting member 2 and the length extending direction of the first connecting member 1 are all in parallel, the first guide block 13 abuts against the other end of the first guide groove 12, and the second guide block 23 abuts against the other end of the second guide groove 22.

Based on the above structure, the adoption of the buffer member 14 makes the movement process of the hinge structure more gentle, and can prop against the user to open and close the hinge structure 6 more violently, so as to prolong the service life of the hinge structure 6, and the reset member 24 makes the opening and closing process of the hinge structure 6 more labor-saving, so that the user has better use experience in the process of using the folding door.

It should be noted that the specific setting positions of the buffer member 14 and the reset member 24 may be adjusted according to the needs of use, for example, one of the buffer member 14 and the reset member 24 may be respectively disposed in the first connecting member 1 and the second connecting member 2, and the specific internal positions thereof are not limited, and only the specific functions of the buffer member 14 and the reset member 24 need to be achieved; the buffer member 14 and the reset member 24 may be provided at the same time in the first and second connection members 1 and 2.

Specifically, the buffer member 14 includes a first bearing 141 and a telescopic rod 142 that are abutted against the first rotating member 3, and when the two connecting members are switched from the open state to the closed state, the first bearing 141 is abutted against the first rotating member 3 in the process, so that the telescopic rod 142 performs telescopic motion through a transmission function. Because the telescopic rod 142 has higher structural strength, the energy converted from the open state to the closed state of the two connecting pieces is uniformly and softly transferred through self deformation, so that the opening and closing process of the hinge is light, smooth and low in noise, and is not easy to clamp hands. For example, the buffer member 14 may be a nylon hydraulic damper or a brass hydraulic damper, and a damping grease having a lubricating effect may be added during use to achieve an optimal buffering effect.

Specifically, referring to fig. 6, the first rotating member 3 is provided with a groove 31, the second rotating member 4 is partially installed in the groove 31, and the cooperative member 5 sequentially passes through the first rotating member 3 and the second rotating member 4, so that the rotation of the first rotating shaft and the second rotating shaft is kept synchronous by the cooperative member. Preferably, holes are correspondingly arranged on the first rotating member 3 and the second rotating member 4, so that the weight is further reduced.

Preferably, the folding door hinge structure 6 is integrally made of 304 stainless steel or cold rolled steel, and the 304 stainless steel has strong rust resistance and corrosion resistance and can be suitable for relatively humid environments such as kitchen balconies in toilets.

In this embodiment, the first connecting piece 1 includes a first accommodating cavity 11, the second connecting piece 2 includes a second accommodating cavity 21, one end of the first rotating piece 1 is rotatably disposed in the first accommodating cavity 11, one end of the second rotating piece 2 is rotatably disposed in the second accommodating cavity 21, and of course, the rotational relationship between the first rotating piece and the second rotating piece and the rotational relationship between the second rotating piece and the second rotating piece can be selected according to actual requirements, and the rotational relationship can be formed on the upper portions of the first connecting piece and the second connecting piece or on the lower portions of the first connecting piece and the second connecting piece, wherein the rotational relationship is the optimal scheme in the accommodating cavity.

Preferably, according to the needs of using, the first rotating member 3 and the second rotating member 4 are connected in a detachable connection mode, the first connecting member 1 and the first rotating member 3 are connected in a detachable connection mode, and the second connecting member 2 and the second rotating member 4 are connected in a detachable connection mode, so that the whole hinge structure is convenient to install and detach.

With continued reference to fig. 8 and 9, on the basis of combining fig. 7 and 10, the folding door hinge structure 6 is mounted at the upper frame end of the door leaf 7, and the folding door has the folding door hinge structure 6, and further includes a door frame 10, at least two door leaves 7 disposed in the door frame 10, a pulley block 8 connected with the door leaf 7, the door frame 10 is laid with a guide rail 9, the pulley block 8 runs in the guide rail 9, the pulley block 8 is connected with the folding door hinge structure 6, two adjacent door leaves 7 are connected through the folding door hinge structure 6, the pulley block 8 is provided with a connecting rod 81, and the connecting rod 81 is inserted into the cooperative piece 5, so that the two adjacent door leaves 7 synchronously realize mutual folding in the sliding process under the action of external force. When the folding door is in the fully opened state, as shown in fig. 9, the corresponding folding door hinge structure 6 is in the fully opened state as shown in fig. 3, and the existence of the hinge structure is not easily visually observed; when the folding door is in the fully folded state, as shown in fig. 8, the corresponding folding door hinge structure 6 correspondingly assumes the closed state as shown in fig. 2, the presence of which is still not easily visible visually.

On the basis of the structure, the opening and closing movement process of the folding door hinge structure 6 and the opening and closing movement process of the folding door leaf 7 are well fused, the pulley block 8 is matched with the cooperative piece 5 through the connecting rod 81, so that the door leaf 7 can be synchronously folded or unfolded in the sliding process, and meanwhile, the stability of the movement process is high, and the door leaf 7 is not easy to be visually captured.

Preferably, a handle is provided on the front or back of the door leaf 7, and the handle is typically provided at an edge of the door leaf 7, so that a user can open or close the folding door by using the handle of any door leaf 7.

Preferably, for better operation of the folding door, the hinge structures of the folding door can be matched and used in pairs, the hinge structures 6 can be arranged at the joints of the upper frame end and the lower frame end of the door leaves one by one to realize stable operation of the folding door, and as the number of the door leaves used is increased, the upper hinge structure and the lower hinge structure are arranged at intervals to be connected with the pulley block through connecting rods, so that reasonable sliding and folding of the folding door are realized, in the embodiment shown in fig. 9, the hinge structures connected with the pulley block through the connecting rods are adopted between the upper end and the lower end of the second door leaf and the lower end of the third door leaf, and the end parts between the other door leaves are not connected with the pulley block through connecting rods.

The technical means disclosed by the scheme of the utility model is not limited to the technical means disclosed by the embodiment, and also comprises the technical scheme formed by any combination of the technical features. It should be noted that modifications and adaptations to the utility model may occur to one skilled in the art without departing from the principles of the present utility model and are intended to be within the scope of the present utility model.

Claims

1. A folding door hinge structure for setting at the ends of two door leaves, comprising:

An opening/closing member (15); and

A first connecting piece (1) and a second connecting piece (2) which are respectively arranged at two ends of the opening and closing piece (15) and are movably connected with the opening and closing piece (15),

The first connecting piece (1) is used for being connected with the end part of the upper frame or the lower frame of one door leaf;

the second connecting piece (2) is used for being connected with the end part of the upper frame or the lower frame of the other door leaf.

2. A folding door hinge structure according to claim 1, wherein said opening and closing member is adapted to drive said first connecting member and said second connecting member to perform an opening-closing movement,

When the opening and closing piece (15) is in an opening state, the two connecting pieces are opened on the same straight line and are used for accommodating the opening and closing piece (15) at the end parts of the upper frame or the lower frame on the same side of the two door pages, so that the two door pages are opened;

When the opening and closing piece (15) is in a closed state, the two connecting pieces are closed, so that the two connecting pieces are flush with the end parts of the upper frame or the lower frame of the two door leaves, and the two door leaves are folded.

3. A folding door hinge structure according to claim 2, characterized in that the opening and closing member comprises a first rotating member (3), a second rotating member (4), the first rotating member (3) and the second rotating member (4) being hinged;

the first rotating piece (3) is movably assembled on the first connecting piece (1);

the second rotating piece (4) is movably assembled on the second connecting piece (2);

When the two connecting pieces are in an open state, the first rotating piece (3) partially extends out of the first connecting piece (1), and the second rotating piece (4) partially extends out of the second connecting piece (2), so that the two door pages are folded;

When the two connecting pieces are in a closed state, the first connecting piece (1) and the second connecting piece (2) are connected, so that the first rotating piece (3) and the second rotating piece (4) are completely contained at the end parts of the upper frame or the lower frame of the two door pages, and the two door pages are simultaneously opened.

4. A folding door hinge structure according to claim 3, wherein,

The first connecting piece (1) is provided with a first guide groove (12), and the second connecting piece (2) is provided with a second guide groove (22);

One end of the first rotating piece (3) is provided with a first guide block (13), the first guide block (13) is in sliding connection with the first guide groove (12), and the other end of the first rotating piece (3) is in rotating connection with the second connecting piece (2);

One end of the second rotating piece (4) is provided with a second guide block (23), the second guide block (23) is in sliding connection with the second guide groove (22), and the other end of the second rotating piece (4) is in rotating connection with the first connecting piece (1);

When the two connecting pieces are in an open state, the first guide block (13) is abutted against one end of the first guide groove (12), and the second guide block (23) is abutted against one end of the second guide groove (22);

When the two connecting pieces are in a closed state, the first guide block (13) is abutted against the other end of the first guide groove (12), and the second guide block (23) is abutted against the other end of the second guide groove (22).

5. A folding door hinge structure according to claim 4, characterized in that said opening and closing member further comprises a cooperating member (5), said cooperating member (5) passing through said first rotating member (3) and said second rotating member (4) in sequence,

The co-operating member (5) keeps the movement of the first rotating member (3) and the second rotating member (4) synchronized.

6. A folding door hinge structure according to claim 5, wherein,

The first rotating member (3) rotates around a first rotating shaft (32), the first rotating shaft (32) is arranged on the second connecting member (2),

The second rotating piece (4) rotates around a second rotating shaft (42), the second rotating shaft (42) is arranged on the first connecting piece (1),

The first rotating member (3) is provided with a groove (31), the second rotating member (4) is partially arranged in the groove (31),

The co-ordinating member (5) keeps the rotation of the first shaft (32) and the second shaft (42) synchronized.

7. A folding door hinge structure according to claim 2, characterized in that the first connecting piece (1) is further provided with a buffer piece (14), said buffer piece (14) abutting on the first rotating piece (3) for buffering when the two connecting pieces are switched from the open state to the closed state.

8. A folding door hinge structure according to claim 3, wherein the second rotating member (4) is further provided with a protrusion (41), the second connecting member (2) is further provided with a resetting member (24), one end of the resetting member (24) is connected with the protrusion (41), and the other end of the resetting member (24) is fixedly arranged on the second connecting member (2).

9. A folding door comprising a door frame (10), at least two door leaves (7) arranged in the door frame (10), and a folding door hinge structure (6) according to any one of claims 1-8, wherein two adjacent door leaves (7) are connected at the end parts of an upper frame or a lower frame of the door leaves (7) through the folding door hinge structure (6).

10. A folding door according to claim 9, characterized in that it further comprises a pulley block (8) connected to the door leaf (7), the door frame (10) being laid with a guide rail (9), the pulley block (8) running in the guide rail (9), the pulley block (8) being provided with a connecting rod (81),

The connecting rod (81) is inserted into the cooperative piece (5), so that two adjacent door pages (7) can be synchronously folded in the sliding process under the action of external force.