CN214247052U

CN214247052U - Invisible door

Info

Publication number: CN214247052U
Application number: CN202023140501.XU
Authority: CN
Inventors: 王生; 汤荣发; 孙茜慧; 李金刚
Original assignee: Golden Curtain Wall Group Co ltd
Current assignee: Golden Curtain Wall Group Co ltd
Priority date: 2020-12-23
Filing date: 2020-12-23
Publication date: 2021-09-21
Anticipated expiration: 2030-12-23

Abstract

The utility model discloses an invisible door, include: a stone panel; the stone panel is fixed on the keel frame; the hinge is arranged at the back of the stone panel and used for connecting the curtain wall and the keel frame, and the stone panel is opened or closed through the hinge; and an invagination type handle. This stealthy door, the stone material panel is fixed on keel frame, and adopt hinge formula design, the mode of door-hinge and ball bearing open about adopting with the tradition is compared, the structure is firm, high durability and convenient installation, the hinge hides the back that sets up at the stone material panel, can't open the hinge from the front, the hinge is inside and outside open-type hinge, one kind in one-way outer open-type hinge and the one-way interior open-type hinge, open in a flexible way, furthermore, adopt the sunken formula handle that caves in that sets up, the stone material panel of being convenient for is opened, the attached stone material paster on surface of the formula handle that caves in, wholly seem to be integrative stone material, and keep highly uniform with peripheral stone material curtain, this utility model is used for the building curtain field.

Description

Invisible door

Technical Field

The utility model relates to a building curtain field especially relates to an invisible door.

Background

Along with the development of curtain wall technique, the door and window system of various forms appears, no matter use at glass curtain wall, still the door and window of curtain such as stone material, aluminum plate, adopt aluminum alloy frame and glass's configuration mostly, require when door and window and keep unanimous with curtain facade appearance effect, like fire hydrant door and window among stone material door and window, aluminum plate door and window, the curtain, aluminum alloy frame inlays glass panels and obviously can not embody the uniformity of the whole effect of curtain facade well.

Particularly, in the stone curtain wall, the condition that the stone is used as the invisible door is required to be selected for keeping the appearance of the curtain wall consistent, and the stone door needs to be stable in structure, attractive in decorative surface, simple to install and convenient to maintain. Most stone doors are processed in a way similar to wall stone dry hanging, and the doors are opened mostly in a way of adopting an upper door shaft, a lower door shaft and a ball bearing. Although the method can keep the consistency of the whole stone wall surface, the method has the problems of high construction and installation difficulty, complex working procedures, single opening direction, difficult maintenance and the like.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to solve one of the technical problem that exists among the prior art at least, provide an open nimble convenient and simple to operate's stealthy door.

According to the utility model discloses an embodiment provides a stealthy door, include:

a stone panel;

the stone panel is fixed on the keel frame;

the hinge is arranged at the back of the stone panel and used for connecting the curtain wall with the keel frame, the stone panel is opened or closed through the hinge, and the hinge is one of an inward and outward opening type hinge, an unidirectional outward opening type hinge and an unidirectional inward opening type hinge; and

invagination formula handle, invagination formula handle is sunken to the inboard and is set up the front of stone material panel, invagination formula handle includes attached stone material paster on surface for form with stone material panel integrative visual effect.

The invisible door at least has the following beneficial effects: this stealthy door, the stone material panel is fixed on keel frame, and adopt hinge formula design, door-hinge and ball bearing open's mode is compared about adopting with the tradition, the structure is firm, high durability and convenient installation, the hinge is hidden and is set up at the back of stone material panel, can't open the hinge from the front, the hinge is inside and outside open-type hinge, one kind in one-way outer open-type hinge and the one-way interior open-type hinge, open in a flexible way, furthermore, adopt the sunken formula handle that caves in that sets up, the stone material panel of being convenient for is opened, the attached stone material paster on the surface of the formula handle that caves in, wholly seem to be integrative stone material, and keep the highly uniform nature with peripheral stone material curtain.

According to the utility model discloses stealthy door, be equipped with the crash pad on the hinge, the back of stone material panel is close to one side of hinge is equipped with the safe edge, be used for when the stone material panel is opened with the crash pad contact forms spacingly.

According to the invisible door of the embodiment of the utility model, the inner and outer opening type hinge comprises a first fixing piece, a first inner opening piece and a first outer opening piece; the first fixing piece is used for being fixedly connected with a curtain wall; one end of the first inner opening piece is rotatably connected with the first fixing piece and can rotate inwards; the first outer opening piece is rotatably connected with the other end of the first inner opening piece and can rotate outwards; the keel frame is fixedly connected with the first external opening piece.

According to the utility model discloses stealthy door, first mounting has the rotation connecting portion, be in on the first mounting the outside of rotating connecting portion is equipped with the first spacing portion of convex, in first open on the piece with first mounting rotates the one end of connecting and is equipped with first limiting plate, be used for with the contact of first spacing portion forms spacingly, in order to restrict open toward the outside in first open.

According to the utility model discloses stealthy door, be in on the first mounting the inboard of rotating connecting portion is equipped with the spacing portion of convex second, be used for with it is spacing that the contact forms when opening to the inboard in the first interior division of parts.

According to the embodiment of the utility model provides an invisible door, be equipped with first draw-in groove in the spacing portion of second, in open in first be equipped with the second draw-in groove that first draw-in groove corresponds, inside and outside open-type hinge still includes first fixed fastener, first fixed fastener can with first draw-in groove with second draw-in groove joint for the restriction in first open in the piece is rotatory.

According to the embodiment of the utility model provides an invisible door, first outer opening last keep away from with the first one end of interior opening rotation hookup location is equipped with the third draw-in groove, interior outer open-type hinge still includes the fixed fastener of second, the fixed fastener of second can with the second draw-in groove with third draw-in groove joint for the restriction first outer opening is relative first interior opening is rotatory.

According to the utility model discloses stealthy door, first outer division go up keep away from with the first one end of interior division of rotation hookup location of opening is equipped with the spacing portion of convex third, be used for with the side contact of the first interior division of opening forms spacingly, with the restriction first outer division of opening toward the inboard opening.

According to stealthy door, one-way outward opening hinge include the second mounting and the second outer piece that opens, the second mounting be used for with curtain fixed connection, the second outer piece that opens with the second mounting rotates to be connected, keel frame with the second outer piece fixed connection that opens, be equipped with the spacing portion of convex fourth on the second outer piece that opens, be used for with the side contact of second mounting forms spacingly, in order to restrict the second outer piece that opens toward the inboard and open.

According to the invisible door of the embodiment of the utility model, the one-way inward opening type hinge comprises a third fixing piece and a second inward opening piece, the third fixing piece is used for being fixedly connected with the curtain wall, the second inward opening piece is rotatably connected with the third fixing piece, the keel frame is fixedly connected with the second inward opening piece, and the third fixing piece is provided with a rotating connecting part; a second limiting plate is arranged at one end, rotatably connected with the third fixing piece, of the second inner opening piece and is used for being in contact with the fifth limiting part to form limiting so as to limit the second inner opening piece to be opened towards the outer side; and the third fixing piece is provided with a convex sixth limiting part on the inner side of the rotating connecting part, and the third fixing piece is used for being contacted with the second inner opening piece to form limiting when the second inner opening piece is opened inwards.

According to the utility model discloses stealthy door, the stone material panel is tied the installation through the back and is fixed on the keel frame, keel frame's back cladding has the aluminum plate that is used for decorating.

Drawings

The present invention will be further explained with reference to the accompanying drawings:

FIG. 1 is a front view of an invisible door according to an embodiment of the present invention;

FIG. 2 is a side view of a privacy door according to an embodiment of the present invention;

FIG. 3 is a schematic sectional view of the invisible door according to the embodiment of the present invention;

FIG. 4 is a schematic structural view of the hinge of the embodiment of the present invention, which is opened inside and outside the hinge, installed in the shaft core;

fig. 5 is a top view of the inner and outer opening hinge according to the embodiment of the present invention;

fig. 6 is a schematic structural view of a first fixing member according to an embodiment of the present invention;

FIG. 7 is a top view of a first mount according to an embodiment of the present invention;

fig. 8 is a schematic structural view of a first inner opening piece according to an embodiment of the present invention;

fig. 9 is a schematic structural view of the first inner opening piece from another perspective according to the embodiment of the present invention;

FIG. 10 is a schematic structural view of a first external opening member according to an embodiment of the present invention;

FIG. 11 is a top view of a first external opening member according to an embodiment of the present invention;

fig. 12 is a schematic structural view of the first fixing clip mounted on the inward and outward opening hinge according to the embodiment of the present invention;

fig. 13 is a schematic sectional view of the invisible door according to the embodiment of the present invention, wherein the inward and outward opening hinges are opened outward;

fig. 14 is a schematic sectional view of the invisible door according to the embodiment of the present invention, wherein the inward and outward opening hinges are opened to the maximum outward direction;

fig. 15 is a schematic structural view of the second fixing clip mounted on the inward and outward opening hinge according to the embodiment of the present invention;

fig. 16 is a schematic structural view of the inner and outer opening type hinge of the embodiment of the present invention engaged with the second fixing clip;

fig. 17 is a schematic sectional view of the invisible door according to the embodiment of the present invention, in which the inner and outer opening hinges are opened inward;

fig. 18 is a schematic sectional view of the invisible door according to the embodiment of the present invention, wherein the inner and outer opening hinges are opened inward to a maximum angle;

fig. 19 is a schematic sectional view of the invisible door according to the embodiment of the present invention, wherein the hinge is an one-way outward-opening hinge;

fig. 20 is a schematic sectional view of the invisible door according to the embodiment of the present invention, wherein the hinge is an one-way inward-opening hinge;

reference numerals: the panel comprises a stone panel 100, a protective edge 110, a keel frame 200, an inward and outward opening hinge 300, a first fixing member 310, a first limiting portion 311, a second limiting portion 312, a first clamping groove 313, a first inward opening piece 320, a first limiting plate 321, a second clamping groove 322, a first outward opening piece 330, a third limiting portion 331, a third clamping groove 332, a first fixing clamping piece 340, a first transverse plate 341, a first side plate 342, a second side plate 343, a second fixing clamping piece 350, a second transverse plate 351, a third side plate 352, a fourth side plate 353, a fifth side plate 354, a unidirectional outward opening hinge 400, a second fixing member 410, a second outward opening piece 420, a fourth limiting portion, a unidirectional inward opening hinge 500, a third fixing member 510, a fifth limiting portion 511, a sixth limiting portion 512, a second inward opening piece 520, a second limiting plate 521, an inward recessed handle 600, a curtain wall 700, an anti-collision pad 800, an electric plug lock 900, a rotating shaft barrel 10 and a shaft core 20.

Detailed Description

This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.

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

In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

Referring to fig. 1 to 3, an embodiment of the present invention provides a stealth door, including: the stone panel 100, the stone panel 100 can be a pure stone panel 100 or a honeycomb stone panel 100; the stone panel 100 is fixedly installed on the keel frame 200 through a back bolt, the keel frame 200 is a steel frame, and the back of the keel frame 200 is coated with an aluminum plate for decoration; the hinges are arranged at the back of the stone panel 100 and the side of the keel frame 200 and are used for connecting the curtain wall 700 and the keel frame 200, the stone panel 100 is opened or closed through the hinges, and the hinges are one of inward and outward opening hinges 300, one-way outward opening hinges 400 and one-way inward opening hinges 500; and sunken formula handle 600 in, sunken formula handle 600 in sets up in stone panel 100's front to the inboard sunken, sunken formula handle 600 in includes corrosion resistant plate and attached stone material paster on surface, the stone material paster is the same with stone panel 100's material, the stone material paster can form the visual effect integrative with stone panel 100.

The stealthy door of this embodiment, stone material panel 100 is fixed on keel frame 200, and adopt the design of hinge formula, the mode that door-hinge and ball bearing opened about adopting with the tradition compares, the structure is firm, high durability and convenient installation, the hinge is hidden to be set up at stone material panel 100's back, from the front unable hinge of opening, the hinge is inside and outside open-type hinge 300, one of one-way outward opening type hinge 400 and one-way inward opening type hinge 500, open in a flexible way, in addition, adopt sunken formula handle 600 that sets up, be convenient for stone material panel 100 to open, the attached stone material paster on surface of sunken formula handle 600, whole looks be integrative stone material, and keep the highly uniform nature with peripheral stone material curtain 700.

In this embodiment, the hinge is provided with the crash pad 800, one side of the back of the stone panel 100 close to the hinge is provided with the protective edge 110, the side is used for contacting the crash pad 800 when the stone panel 100 is opened to form a limit position, the maximum opening angle is 90 °, the crash pad 800 and the protective edge 110 simultaneously play a role of crash prevention, and the invisible door is prevented from being collided to generate abrasion or damage when the maximum opening angle is opened, referring to fig. 3, 12 and 13.

The hinge is one of an inward and outward opening type hinge 300, a one-way outward opening type hinge 400 and a one-way inward opening type hinge 500, wherein the inward and outward opening type hinge 300 is adopted, and the stone panel 100 can be selectively opened towards the inner side or the outer side; the stone panel 100 can be opened to the outside by adopting the unidirectional outward-opening hinge 400; with the unidirectional inward-opening hinge 500, the stone panel 100 can be opened inward. The electrical plug lock 900 is disposed above the stone panel 100, and in a closed state, the electrical plug lock 900 can lock the stone panel 100.

It will be appreciated that the inner side is the side near the curtain wall 700 and the outer side is the side away from the curtain wall 700.

Referring to fig. 4 to 11, in the present embodiment, the inside-outside opening hinge 300 includes a first fixing member 310, a first inside opening member 320, and a first outside opening member 330; the first fixing piece 310 is fixedly connected with the upright post of the curtain wall 700 through screws, and a mounting plate is arranged on the first fixing piece 310 and provided with mounting holes for the screws to pass through; one end of the first inner opening piece 320 is rotatably connected with the first fixing piece 310 and can rotate inwards; the first outer opening part 330 is rotatably connected with the other end of the first inner opening part 320 and can rotate outwards; the keel frame 200 is fixedly connected to the first outer opening 330.

The first fixing member 310, the first inner opening member 320 and the first outer opening member 330 each have a rotation connection portion, specifically, the rotation connection portion is a rotation shaft barrel 10, the rotation shaft barrel 10 is inserted by using the shaft core 20, and the bottom portion is locked by using double nuts, so that the rotation connection between the first fixing member 310 and the first inner opening member 320, and between the first inner opening member 320 and the first outer opening member 330 can be formed, as shown in fig. 4.

In some embodiments, the first fixing member 310 is provided with a protruding first position-limiting portion 311 on the outer side of the rotating shaft cylinder 10; the first limiting plate 321 is disposed at one end of the first inward opening piece 320 rotatably connected to the first fixing member 310, and the first limiting plate 321 can contact with the first limiting portion 311 to limit the opening of the first inward opening piece 320 to the outside, i.e., the first inward opening piece 320 can only open the stone panel 100 to the inside.

The first fixing member 310 is provided with a second protruding limiting portion 312 at the inner side of the rotation connecting portion, the second limiting portion 312 can contact with the first inner opening piece 320 to form a limiting position when the first inner opening piece 320 is opened inwardly, and the maximum rotation angle of the first inner opening piece 320 when the first inner opening piece 320 is opened inwardly is 90 °.

Referring to fig. 12 to 14, further, a first engaging groove 313 is disposed on the second limiting portion 312, a second engaging groove 322 corresponding to the first engaging groove 313 is disposed on the first inner opening piece 320, the inner and outer opening hinge 300 further includes a first fixing engaging piece 340, and the first fixing engaging piece 340 can be engaged with the first engaging groove 313 and the second engaging groove 322 to limit the rotation of the first inner opening piece 320. Specifically, the first fixing clip 340 includes a first transverse plate 341, and a first side plate 342 and a second side plate 343 disposed on both sides of the first transverse plate 341, and the first fixing clip 340 can be installed by rotating the first internally-opened piece 320 to make the first slot 313 and the second slot 322 on the same straight line, wherein the first transverse plate 341 is inserted into the first slot 313 and the second slot 322, and is limited by the first side plate 342 and the second side plate 343.

When the stone panel 100 is opened outwards, the first fixing fastener 340 is installed to limit the rotation of the first inward opening piece 320, the first fixing piece 310 and the first inward opening piece 320 are integrated, the first outward opening piece 330 is not limited, the first outward opening piece 330 is rotatably connected with the first inward opening piece 320, and the stone panel 100 can be opened outwards through the first outward opening piece 330.

In some embodiments, a protruding third position-limiting portion 331 is disposed on an end of the first external opening member 330 away from the position where the first external opening member 320 is rotatably connected, and the third position-limiting portion 331 can contact with a side surface of the first internal opening member 320 to form a position-limiting function, so as to limit the first external opening member 330 from being opened inward, that is, the first external opening member 330 can only open the stone panel 100 outward.

Referring to fig. 15 to 18, a third engaging groove 332 is formed at an end of the first outer opening member 330 away from the position where the first outer opening member is rotatably connected to the first inner opening member 320, and the inner and outer opening hinge 300 further includes a second fixing engaging member 350, and the second fixing engaging member 350 is engageable with the second engaging groove 322 and the third engaging groove 332 to limit the first outer opening member 330 from rotating relative to the first inner opening member 320. Specifically, the second fixing clip 350 includes a second horizontal plate 351, a third side plate 352 and a fourth side plate 353 disposed on two sides of the second horizontal plate 351, and a fifth side plate 354 disposed on a side edge of the third side plate 352, and the second fixing clip 350 can be installed by rotating the first external opening piece 330 to make the third limiting portion 331 contact with the first internal opening piece 320, wherein the third side plate 352 is in snap fit with the second slot 322, and the fourth side plate 353 is in snap fit with the third slot 332 and is limited by the fifth side plate 354.

When the stone panel 100 selects the inward opening mode, the first fixing fastener 340 is removed, the second fixing fastener 350 is installed, the first outward opening piece 330 is limited to rotate relative to the first inward opening piece 320, the first outward opening piece 330 and the first inward opening piece 320 are equivalent to a whole, the first inward opening piece 320 does not rotate relative to the first fixing piece 310, and the stone panel 100 can be opened inward through the first inward opening piece 320. In order to avoid the interference between the second fixing clip 350 and the second limiting portion 312, an avoiding opening is provided at a corresponding position of the second limiting portion 312 to avoid the second fixing clip 350.

Therefore, in the inward and outward opening hinge 300 of the present embodiment, the first fixing clip 340 or the second fixing clip 350 is installed as required, and an outward opening or inward opening mode can be selected, so that the opening of the stone panel 100 is more flexible; of course, it can be understood that when the first fixing latch 340 and the second fixing latch 350 are not installed, the first inner opening member and the first outer opening member are not limited, and the stone panel 100 can be opened toward the inner side or the outer side.

Besides the above-mentioned inward and outward opening hinge 300, the hinge may also be an unidirectional outward opening hinge 400 or an unidirectional inward opening hinge 500.

Referring to fig. 19, in some embodiments, the unidirectional outward opening hinge 400 includes a second fixing member 410 and a second outward opening member 420, the second fixing member 410 is fixedly connected to the upright of the curtain wall 700 by screws, the second outward opening member 420 is rotatably connected to the second fixing member 410, the keel frame 200 is fixedly connected to the second outward opening member 420, a fourth protruding limiting portion 421 is disposed on the second outward opening member 420, and the fourth limiting portion 421 can contact with a side surface of the second fixing member 410 to form a limiting position so as to limit the second outward opening member 420 from being opened inward, that is, the second outward opening member 420 can only open the stone panel 100 outward.

Referring to fig. 20, in some embodiments, the unidirectional inward opening hinge 500 includes a third fixing member 510 and a second inward opening member 520, the third fixing member 510 is fixedly connected to the pillar of the curtain wall 700 by a screw, the second inward opening member 520 is rotatably connected to the third fixing member 510, and the keel frame 200 is fixedly connected to the second inward opening member 520; a convex fifth limiting part 511 is arranged on the third fixing part 510 at the outer side of the rotating shaft cylinder 10, a second limiting plate 521 is arranged at one end of the second inner opening part 520 rotatably connected with the third fixing part 510, and the second limiting plate 521 can contact with the fifth limiting part 511 to form limiting so as to limit the second inner opening part 520 to be opened towards the outer side, that is, the second inner opening part 520 only can open the stone panel 100 towards the inner side; the third fixing member 510 is provided with a convex sixth limiting portion 512 on the inner side of the rotating shaft cylinder 10, the sixth limiting portion 512 can contact with the second inner opening piece 520 to form a limiting position when the second inner opening piece 520 is opened inwards, and the maximum rotation angle of the second inner opening piece 520 when the second inner opening piece 520 is opened inwards is 90 °.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.

Claims

1. A hidden door, comprising:

a stone panel;

the stone panel is fixed on the keel frame;

2. The invisible door of claim 1, wherein: the stone panel is characterized in that an anti-collision pad is arranged on the hinge, and a protective edge is arranged on one side, close to the hinge, of the back of the stone panel and used for limiting the stone panel in contact with the anti-collision pad when the stone panel is opened.

3. The invisible door of claim 1, wherein: the inner and outer opening type hinge comprises a first fixing piece, a first inner opening piece and a first outer opening piece; wherein the content of the first and second substances,

the first fixing piece is used for being fixedly connected with the curtain wall;

one end of the first inner opening piece is rotatably connected with the first fixing piece and can rotate inwards;

the first outer opening piece is rotatably connected with the other end of the first inner opening piece and can rotate outwards;

the keel frame is fixedly connected with the first external opening piece.

4. The invisible door of claim 3, wherein: first mounting has the rotation connecting portion, be in on the first mounting the outside of rotating connecting portion is equipped with convex first spacing portion, in first open on the piece with the one end that first mounting rotated the connection is equipped with first limiting plate, be used for with it is spacing that first spacing portion contact forms, opens towards the outside in order to restrict in first open the piece.

5. The invisible door of claim 4, wherein: the first fixing piece is provided with a second protruding limiting part on the inner side of the rotating connecting part and used for limiting when the first inner opening piece is opened inwards in a contacting mode.

6. The invisible door of claim 5, wherein: the hinge comprises a first limiting part and a second limiting part, wherein the first limiting part is provided with a first clamping groove, the first inner opening part is provided with a second clamping groove corresponding to the first clamping groove, the inner and outer opening type hinge further comprises a first fixing clamping part, and the first fixing clamping part can be clamped with the first clamping groove and the second clamping groove to limit the first inner opening part to rotate.

7. The invisible door of claim 6, wherein: the first outer opening part is provided with a third clamping groove at one end far away from the first inner opening part rotating connection position, the inner and outer opening type hinge further comprises a second fixing clamping part, and the second fixing clamping part can be clamped with the second clamping groove and the third clamping groove to limit the first outer opening part to rotate relative to the first inner opening part.

8. The invisible door of claim 1, wherein: the one-way outward-opening hinge comprises a second fixing piece and a second outward-opening piece, the second fixing piece is used for being fixedly connected with a curtain wall, the second outward-opening piece is rotatably connected with the second fixing piece, the keel frame is fixedly connected with the second outward-opening piece, and a convex fourth limiting portion is arranged on the second outward-opening piece and used for limiting the side face of the second fixing piece in a contact mode to limit the second outward-opening piece to be opened towards the inner side.

9. The invisible door of claim 1, wherein: the unidirectional inward opening type hinge comprises a third fixing piece and a second inward opening piece, the third fixing piece is used for being fixedly connected with a curtain wall, the second inward opening piece is rotatably connected with the third fixing piece, the keel frame is fixedly connected with the second inward opening piece, and the third fixing piece is provided with a rotating connecting part;

a second limiting plate is arranged at one end, rotatably connected with the third fixing piece, of the second inner opening piece and is used for being in contact with the fifth limiting part to form limiting so as to limit the second inner opening piece to be opened towards the outer side;

and a sixth limiting part protruding from the inner side of the rotating connecting part is arranged on the third fixing part and is used for limiting when the third fixing part and the second inner opening part are opened inwards.

10. The invisible door of claim 1, wherein: the stone panel is fixed on the keel frame through back bolts, and the back of the keel frame is coated with an aluminum plate for decoration.