A hidden hinge of the flat opening type

Abstract

The utility model belongs to door and window technical field provides a flat -open type hides the hinge, including frame hinge and fan hinge, frame hinge is embedded in the fixed frame of door and window's installation cavity, and with the fixed frame of door and window detachable fixed connection, the downside of frame hinge is equipped with first threaded hole, first threaded hole penetrates frame hinge along the height direction, be equipped with first adjusting spare in first threaded hole, be equipped with the external thread structure of first threaded hole adaptation on first adjusting spare, the lower end of first adjusting spare supports on the section bar end face of installation cavity, the upper end of first adjusting spare is control end, be equipped with the operation space of being able to let the tool and control end adaptation butt joint on frame hinge, fan hinge and the fan frame of door and window are detachable fixed connection, and fan hinge with frame hinge rotatable connection, the utility model has the function of adjustable height, and the installation of hinge and door and window fan is convenient.

Description

Technical Field

[0001] This utility model belongs to the field of door and window technology, specifically relating to a casement concealed hinge. Background Technology

[0002] Concealed hinges are assembled between the door / window sash and the fixed frame through a special embedded installation structure, allowing the door / window sash to rotate without being exposed, thus improving the clean appearance of the door / window product. Although existing concealed hinges have height-adjustable functions, the installation of related height-adjustment components is complex, increasing the assembly requirements of the hinge and the door / window sash. Utility Model Content

[0003] In order to overcome the above-mentioned shortcomings of the prior art, the purpose of this utility model is to provide a hinged concealed hinge with height adjustable function, and easy installation, which facilitates the installation of hinges and door / window sashes.

[0004] The technical solution adopted by this utility model to solve its technical problem is:

[0005] A hinged hinge with a hinged opening mechanism, comprising a frame hinge and a fan hinge;

[0006] The hinge is embedded in the mounting cavity of the fixed frame of the door and window, and is detachably and fixedly connected to the fixed frame of the door and window; the lower side of the hinge has a first threaded hole, which penetrates the hinge along the height direction, and a first adjusting member is provided in the first threaded hole. The first adjusting member has an external thread structure adapted to the first threaded hole, and the lower end of the first adjusting member is supported on the profile end face of the mounting cavity; the upper end of the first adjusting member is a control end, and the hinge has an operating space that allows tools to be adapted to and connected to the control end; when the first adjusting member is rotated, the hinge can move up and down relative to the fixed frame;

[0007] The sash hinge is detachably and fixedly connected to the sash frame of the door and window, and the sash hinge is rotatably connected to the frame hinge.

[0008] In a preferred embodiment of this utility model, the frame hinge has a partially open cavity, and in the closed state, part of the fan hinge is located in the cavity; the first threaded hole penetrates the lower side of the cavity.

[0009] Preferably, the frame hinge includes a base and two connecting parts respectively connected to the upper and lower sides of the base; the two connecting parts are detachably and fixedly connected to the fixed frame; the cavity is provided on the base.

[0010] Preferably, each of the connecting parts is provided with a first adjusting hole and a first locking hole; the first locking hole is an oblong hole extending in the front-back direction, and a first locking member is provided in the first locking hole. The first locking member passes through the first locking hole and is locked and fixed to the fixed frame of the door and window; a second adjusting member is provided in the first adjusting hole, and the second adjusting member includes an eccentrically arranged first adjusting part and a second adjusting part. The first adjusting part is located in the first adjusting hole, and the second adjusting part is rotatably connected to the fixed frame.

[0011] Preferably, the seat body includes a first plane, a second plane, a first side surface, and a second side surface. The first plane and the second plane are parallel to each other and horizontal. The first side surface and the second side surface are located between the first plane and the second plane, and the first side surface and the second side surface are perpendicular to each other. The first plane, the second plane, the first side surface, and the second side surface form the concave cavity.

[0012] The first plane and / or the second plane are provided with the first threaded hole. Both the first plane and the second plane can serve as the lower side of the hinge, so the first threaded hole can be provided on the first plane or the second plane to adapt to the first adjusting member.

[0013] Preferably, the fixing frame is provided with a first clamping piece, which is embedded in the groove of the fixing frame and abuts against both sides of the groove of the fixing frame; the first locking member is locked in place with the first clamping piece.

[0014] Preferably, the first clamping piece is provided with a damping piece, and the two sides of the damping piece abut against the two sides of the groove of the fixing frame.

[0015] In a preferred embodiment of this utility model, the first adjusting member includes a head and a threaded post. The head is larger than the threaded post. One end of the threaded post is connected to the head, and the other end is provided with a shaped recessed hole that is adapted to mate with a tool. The shaped recessed hole constitutes the control end. The head is supported on the profile end face of the mounting cavity.

[0016] In a preferred embodiment of this utility model, the fan hinge includes a first hinge and a second hinge; the first hinge includes a first plate and a second plate, and in the closed state, the first plate and the second plate are connected at a certain angle and correspond to the closed side of the cavity; the first plate is rotatably engaged with the frame hinge; one side of the second hinge is connected to the second plate, and the other side extends in the front-rear direction; the fan frame is detachably and fixedly connected to the second hinge.

[0017] Preferably, the second hinge is mounted on the second plate by a plurality of second locking members; the second plate is provided with a second adjustment hole extending along the height direction and penetrating the second plate; a third adjustment member is provided in the second adjustment hole, the third adjustment member including an eccentrically arranged first column and a second column, the first column being matched and located in the second adjustment hole, and the second column being rotatably connected to the second hinge; a plurality of second locking members are distributed on the upper and lower sides of the third adjustment member, and the second plate is provided with a plurality of second locking holes matching each of the second locking members, the second locking holes extending along the left and right direction, and each of the second locking members passing through the second locking holes and being detachably locked to the second hinge.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] This utility model's hinged concealed hinge features height adjustment. When adjusting the hinge height, loosening the locking mechanism between the hinge and the fixed frame allows them to remain in a pre-fixed state (allowing for vertical movement under external force). Rotating the first adjusting member then engages with the first threaded hole on the hinge, changing the height of the lower end of the adjusting member protruding from the hinge, thus raising or lowering the hinge. The first adjusting member is directly installed on the lower side of the hinge, requiring only a matching first threaded hole on the hinge's lower side, simplifying installation. Furthermore, the first adjusting member's location on the lower side of the hinge and its protrusion through the first threaded hole, with its lower end supported on the profile end face of the fixed frame's mounting cavity, helps prevent the door / window sash and hinge from sagging due to gravity. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a perspective view (closed state) of the hinged concealed hinge of this utility model.

[0022] Figure 2 This is a front view (closed state) of the hinged concealed hinge of this utility model.

[0023] Figure 3 This is a partial exploded perspective view (open state) of the connecting part of the hinge of the present invention.

[0024] Figure 4 This is a partial exploded perspective view (open state) of the hinge in the casement concealed hinge of this utility model.

[0025] Figure 5 This is a schematic diagram of the installation of the hinged concealed hinge, fan frame, and fixing frame of this utility model (open state).

[0026] Figure 6 This is a perspective view (open state) of the hinged concealed hinge of this utility model.

[0027] Figure 7 This is a three-dimensional view of the first hinge.

[0028] Figure 8 This is a three-dimensional view of the second hinge.

[0029] Figure 9 This is a perspective view of the concealed hinge (hidden fan hinge) of this utility model.

[0030] in:

[0031] 1-Frame hinge, 101-Base, 1011-First side, 1012-Second side, 1013-First plane, 1014-Second plane, 102-Connecting part, 1021-First adjusting hole, 1022-First locking hole, 103-First threaded hole, 104-Cavity;

[0032] 2-Hinge, 201-First hinge, 2011-First plate, 2012-Second plate, 20121-Second locking hole, 20122-Second adjusting hole, 202-Second hinge, 2021-Third threaded hole;

[0033] 3-First clamping piece, 301-Second threaded hole;

[0034] 4-First adjusting component, 401-Head, 402-Threaded post, 403-Irregular concave hole;

[0035] 5-Second adjusting member, 501-First adjusting part, 502-Second adjusting part;

[0036] 6-Damping plate, 601-Hollow hole;

[0037] 7-First locking element;

[0038] 8-Second locking element;

[0039] 9-Third adjusting component, 901-First column, 902-Second column;

[0040] 10 - Second clamping piece;

[0041] 11-Clamping screw;

[0042] 12-Fixing frame, 1201-Mounting cavity, 1202-Profile end face;

[0043] 13-Sector frame;

[0044] 14-Spindle. Detailed Implementation

[0045] To better understand the above-mentioned objectives, features, and advantages of this utility model, it will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. Many specific details are set forth in the following description to provide a thorough understanding of this utility model; the described embodiments are merely some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0047] See Figures 1-9 This embodiment discloses a hinged, concealed hinge, including a frame hinge 1 and a fan hinge 2. The hinged, concealed hinge of this embodiment has adjustable height, adjustable front-to-back position, and adjustable left-to-right position, thereby achieving three-dimensional adjustability of the hinge.

[0048] In this embodiment, the frame hinge 1 is embedded in the mounting cavity 1201 of the fixed frame 12 of the door and window, and is detachably and fixedly connected to the fixed frame 12 of the door and window. A first threaded hole 103 is provided on the lower side of the frame hinge 1, extending through the frame hinge 1 along its height direction. A first adjusting member 4 is provided in the first threaded hole 103, and the first adjusting member 4 has an external thread structure adapted to the first threaded hole 103. The lower end of the first adjusting member 4 is supported on the profile end face 1202 of the mounting cavity 1201. The upper end of the first adjusting member 4 is a control end, and the frame hinge 1 has an operating space that allows tools to be adapted to and connected to the control end. When the first adjusting member 4 is rotated using a tool, the frame hinge 1 can move up and down relative to the fixed frame 12 to achieve height adjustment of the hinge. In this embodiment, the sash hinge 2 is detachably and fixedly connected to the sash frame 13 of the door and window, and the sash hinge 2 is rotatably connected to the frame hinge 1.

[0049] When the hinge height needs to be adjusted, loosening the locking mechanism between the frame hinge 1 and the fixed frame 12 allows the frame hinge 1 and the fixed frame 12 to maintain a pre-fixed state (allowing them to move up and down under external force). At this time, rotating the first adjusting member 4 causes it to engage with the first threaded hole 103 of the frame hinge 1, thereby changing the height of the lower end of the first adjusting member 4 protruding from the lower side of the frame hinge 1, achieving the purpose of lifting or lowering the frame hinge 1. In this embodiment, the first adjusting member 4 is directly installed on the lower side of the frame hinge 1, with a matching first threaded hole 103 provided on the lower side of the frame hinge 1. Installation is simple, and the engagement of the first threaded hole 103 with the first adjusting member 4 allows for a large adjustment range, improving the hinge's flexibility. In addition, the first adjusting member 4 in this embodiment is disposed on the lower side of the frame hinge 1 and extends through the first threaded hole 103. The lower end of the first adjusting member 4 is supported on the profile end face 1202 of the mounting cavity 1201 of the fixed frame 12, which helps to prevent the door and window sash and hinge from sagging due to gravity.

[0050] Furthermore, the first adjusting member 4 in this embodiment includes a head 401 and a threaded post 402. The head 401 is larger than the threaded post 402. One end of the threaded post 402 is connected to the head 401, and the other end is provided with a shaped recess 403 that mates with a tool. The shaped recess 403 constitutes the control end. The head 401 is supported on the profile end face 1202 of the mounting cavity 1201. To facilitate tool adaptation, the shaped recess 403 in this embodiment can be a countersunk hole with an internal hexagonal socket or other shapes, as long as it can be adapted to the relevant tool and can rotate with the tool.

[0051] In this embodiment, the frame hinge 1 has a partially open cavity 104, and in the closed state, part of the fan hinge 2 is located in the cavity 104; the first threaded hole 103 penetrates the lower side of the cavity 104. To facilitate the insertion of tools into the cavity 104 to connect with the control end of the first adjusting member 4, a gap is left between the fan hinge 2 and the lower side of the cavity 104 to form an operating space.

[0052] To facilitate connection with the fixed frame 12, the frame hinge 1 includes a base 101 and two connecting parts 102 respectively connected to the upper and lower sides of the base 101; the two connecting parts 102 are detachably and fixedly connected to the fixed frame 12; the cavity 104 is provided on the base 101.

[0053] The seat 101 in this embodiment includes a first plane 1013, a second plane 1014, a first side surface 1011, and a second side surface 1012. The first plane 1013 and the second plane 1014 are parallel to each other and horizontal. The first side surface 1011 and the second side surface 1012 are located between the first plane 1013 and the second plane 1014, and the first side surface 1011 and the second side surface 1012 are perpendicular to each other. The first plane 1013, the second plane 1014, the first side surface 1011, and the second side surface 1012 form a concave cavity 104.

[0054] In this embodiment, the first plane 1013 and / or the second plane 1014 are provided with a first threaded hole 103. Both the first plane 1013 and the second plane 1014 can serve as the lower side of the hinge, therefore, the first threaded hole 103 can be provided on either the first plane 1013 or the second plane 1014 to fit the first adjusting member 4. Preferably, as in this embodiment, the first threaded hole 103 is provided on both the first plane 1013 and the second plane 1014, allowing the hinge to be used in both directions, improving the hinge's adaptability and flexibility. This allows the first adjusting member 4 to be assembled using the first threaded hole 103 located on the lower first plane 1013 or the second plane 1014, depending on the actual installation direction, thereby achieving the hinge's height adjustable function.

[0055] Furthermore, in this embodiment, a pivot 14 is provided between the first plane 1013 and the second plane 1014; the fan hinge 2 is connected to the pivot 14; the pivot 14 is located on one side of the first side surface 1011. The pivot 14 enables a rotatable connection between the fan hinge 2 and the frame hinge 1.

[0056] In this embodiment, a corresponding structure is provided on the connecting part 102 to achieve the adjustability of the hinge in the front-to-back direction, thereby enabling adjustment of the seal between the door / window sash and the fixed frame 12. Specifically, each connecting part 102 is provided with a first adjustment hole 1021 and a first locking hole 1022; the first locking hole 1022 is an oblong hole extending in the front-to-back direction, and a first locking member 7 is provided in the first locking hole 1022. The first locking member 7 passes through the first locking hole 1022 and is locked and fixed to the fixed frame 12 of the door / window. A second adjustment member 5 is provided in the first adjustment hole 1021. The second adjustment member 5 includes an eccentrically arranged first adjustment part 501 and a second adjustment part 502. The first adjustment part 501 is located in the first adjustment hole 1021, and the second adjustment part 502 is rotatably connected to the fixed frame 12.

[0057] Furthermore, in this embodiment, the first adjusting hole 1021 and the first locking hole 1022 are arranged along the height direction, and the first adjusting hole 1021 is located on the side of the first locking hole 1022 away from the seat 101. In this embodiment, the first adjusting hole 1021 is open, and the opening of the first adjusting hole 1021 is located on the side opposite to the first locking hole 1022. Alternatively, the first adjusting hole 1021 in this embodiment can also be a closed, oblong hole, whose shape extends along the height direction, thereby enabling the hinge to move back and forth when the second adjusting member 5 rotates.

[0058] During the forward and backward adjustment, since the first locking hole 1022 extends in the forward and backward direction, the first locking member 7 can move in the forward and backward direction within the first locking hole 1022. This allows the door and window sashes and hinges to be pre-fixed to the fixed frame 12 before adjustment. Then, the second adjusting member 5 is rotated to move the hinges and door and window sashes forward and backward, changing their forward and backward positions. After adjustment, the first locking member 7 is completely locked to the fixed frame 12, thus fixing the relative positions of the hinges, door and window sashes, and fixed frame 12. The advantage of this is that it reduces the burden of supporting the door and window sashes during adjustment, and may even eliminate the need to support them, reducing the difficulty of adjustment and greatly improving convenience.

[0059] In this embodiment, the fixed frame 12 is provided with a first clamping piece 3, which is embedded in the groove of the fixed frame 12 and abuts against both sides of the groove. The first locking member 7 is locked in place with the first clamping piece 3. The second adjusting part 502 of the second adjusting member 5 can be movably riveted to the first clamping piece 3, so that the frame hinge 1 can be moved back and forth when the second adjusting member 5 is rotated. Of course, in addition to being movably riveted to the first clamping piece 3, the second adjusting part 502 of the second adjusting member 5 can also adopt other movable connection methods, or the second adjusting part 502 can be configured to be movably connected to the profile of the fixed frame 12.

[0060] In this embodiment, the locking engagement between the first locking member 7 and the first clamping piece 3 can effectively and stably lock the frame hinge 1 onto the fixed frame 12. The clamping method helps to improve the locking stability and also helps to avoid gaps between the frame hinge 1 and the fixed frame 12, thereby preventing the door and window from shaking during use.

[0061] In this embodiment, two first locking holes 1022 are provided, both of which are countersunk holes. This improves the stability of the locking holes with the profile of the fixing frame 12 and allows for a better fit with the first locking member 7. The first locking member 7 in this embodiment can be a screw, including a head 401 and a threaded section; of course, other threaded components can also be used for the first locking member 7 in this embodiment. To better fit with the threaded section of the first locking member 7, a second threaded hole 301 is provided on the first clamping piece 3.

[0062] The first clamping piece 3 is provided with a damping piece 6, the two sides of which abut against the two sides of the groove of the fixing frame 12. This prevents the first clamping piece 3 from falling off during pre-installation and allows for flexible adjustment of its position within the groove of the fixing frame 12. In this embodiment, the damping piece 6 and the first clamping piece 3 can be connected by riveting. Both sides of the damping piece 6 are provided with perforated holes 601, giving the damping piece 6 a certain degree of deformability.

[0063] The fan hinge 2 in this embodiment includes a first hinge 201 and a second hinge 202; the first hinge 201 includes a first plate 2011 and a second plate 2012. In the closed state, the first plate 2011 and the second plate 2012 are connected at a certain angle and correspond to the closed side of the cavity 104; the first plate 2011 is rotatably engaged with the frame hinge 1, specifically with the rotating shaft 14; one side of the second hinge 202 is connected to the second plate 2012, and the other side extends in the front-back direction; the fan frame 13 is detachably and fixedly connected to the second hinge 202.

[0064] The cooperation between the sash hinge 2 and the frame hinge 1 facilitates a rotatable connection between the door / window sash and the fixed frame 12, and allows the hinge to be more compactly hidden between the door / window sash and the fixed frame 12, achieving the purpose of concealment. Furthermore, this layout of the sash hinge 2 allows the first plane 1013 and the second plane 1014 of the frame hinge 1's base 101 to be exposed as much as possible, thus facilitating the insertion of tools into the recess 104 to properly engage with the first adjusting member 4, thereby completing the height adjustment of the hinge.

[0065] Furthermore, the second hinge 202 is mounted on the second plate 2012 by a plurality of second locking elements 8; the second plate 2012 is provided with a second adjusting hole 20122 extending along the height direction and penetrating the second plate 2012, such as Figure 3 As shown, the second adjusting hole 20122 has an oblong shape. A third adjusting member 9 is provided within the second adjusting hole 20122. The third adjusting member 9 includes an eccentrically positioned first column 901 and second column 902. The first column 901 is located within the second adjusting hole 20122, and the second column 902 is rotatably connected to the second hinge 202. Several second locking members 8 are distributed on the upper and lower sides of the third adjusting member 9. The second plate 2012 has several second locking holes 20121 that match each of the second locking members 8. The second locking holes 20121 extend in the left-right direction, and each second locking member 8 passes through the second locking hole 20121 and is detachably locked to the second hinge 202. When the second hinge 202 is not fully locked to the second plate 2012, rotating the third adjusting member 9 can cause the second hinge 202 to move left and right, thereby achieving a left-right adjustment effect.

[0066] Furthermore, the rotatable connection between the second column 902 and the second hinge 202 in this embodiment can be achieved using a movable riveting or other existing technologies. The second locking member 8 in this embodiment has an external thread structure, and the second hinge 202 has a third threaded hole 2021; the second locking member 8 passes through the second locking hole 20121 on the second plate 2012 and engages with the third threaded hole 2021. The second locking member 8 in this embodiment can be a screw, bolt, or other part with an external thread structure. To further facilitate locking or pre-fixing of the second hinge 202, the second locking hole 20121 in this embodiment can be a countersunk hole.

[0067] In this embodiment, the second hinge 202 is locked and fixed to the sash frame 13 by a second clamping piece 10. The second clamping piece 10 is located in the groove of the sash frame 13 and abuts against the side of the groove. The second hinge 202 is provided with a clamping screw 11, which is connected to the second clamping piece 10. By using the second clamping piece 10 to lock and fix the second hinge 202 and the sash frame 13, the stability of both can be improved, and the defect of gaps between the second hinge 202 and the sash frame 13 can be effectively overcome, making the door and window sash more stable and reliable during opening and closing, and avoiding shaking.

[0068] During the left-right adjustment of the door and window sashes and the second hinge 202, the cooperative assembly relationship of the first hinge 201, the second hinge 202 and the second locking part 8 is utilized, so that the door and window sashes can be temporarily pre-fixed without the need for manual support of the door and window sashes. This greatly facilitates the adjustment of the position of the hinges and the door and window sashes and significantly reduces the difficulty of operation.

[0069] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Therefore, any modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A hinged concealed hinge, comprising a frame hinge and a fan hinge; characterized in that, The hinge is embedded in the mounting cavity of the fixed frame of the door and window, and is detachably and fixedly connected to the fixed frame of the door and window; the lower side of the hinge has a first threaded hole, which penetrates the hinge along the height direction, and a first adjusting member is provided in the first threaded hole. The first adjusting member has an external thread structure adapted to the first threaded hole, and the lower end of the first adjusting member is supported on the profile end face of the mounting cavity; the upper end of the first adjusting member is a control end, and the hinge has an operating space that allows tools to be adapted to and connected to the control end; when the first adjusting member is rotated, the hinge can move up and down relative to the fixed frame; The sash hinge is detachably and fixedly connected to the sash frame of the door and window, and the sash hinge is rotatably connected to the frame hinge.

2. The hinged concealed hinge according to claim 1, characterized in that, The frame hinge has a partially open cavity on one side, and in the closed state, part of the fan hinge is located in the cavity; the first threaded hole penetrates the lower side of the cavity.

3. The hinged concealed hinge according to claim 2, characterized in that, The frame hinge includes a base and two connecting parts respectively connected to the upper and lower sides of the base; the two connecting parts are detachably and fixedly connected to the fixed frame; the cavity is provided on the base.

4. The hinged concealed hinge according to claim 3, characterized in that, Each of the connecting parts is provided with a first adjustment hole and a first locking hole; the first locking hole is an oblong hole extending in the front-back direction, and a first locking member is provided in the first locking hole. After the first locking member passes through the first locking hole, it is locked and fixed to the fixed frame of the door and window; a second adjustment member is provided in the first adjustment hole, and the second adjustment member includes an eccentrically arranged first adjustment part and a second adjustment part. The first adjustment part is located in the first adjustment hole, and the second adjustment part is rotatably connected to the fixed frame.

5. The hinged concealed hinge according to claim 3 or 4, characterized in that, The seat body includes a first plane, a second plane, a first side surface, and a second side surface. The first plane and the second plane are parallel to each other and horizontal. The first side surface and the second side surface are located between the first plane and the second plane, and the first side surface and the second side surface are perpendicular to each other. The first plane, the second plane, the first side surface, and the second side surface form the concave cavity. The first plane and / or the second plane are provided with the first threaded hole.

6. The hinged concealed hinge according to claim 4, characterized in that, The fixed frame is provided with a first clamping piece, which is embedded in the groove of the fixed frame and abuts against both sides of the groove of the fixed frame; the first locking member is locked in place with the first clamping piece.

7. The hinged concealed hinge according to claim 6, characterized in that, The first clamping piece is provided with a damping plate, and the two sides of the damping plate abut against the two sides of the groove of the fixing frame.

8. The casement concealed hinge according to any one of claims 1-4, characterized in that, The first adjusting component includes a head and a threaded post. The head is larger than the threaded post. One end of the threaded post is connected to the head, and the other end is provided with a shaped recessed hole that mates with a tool. The shaped recessed hole constitutes the control end. The head is supported on the profile end face of the mounting cavity.

9. The casement concealed hinge according to any one of claims 2-4, characterized in that, The fan hinge includes a first hinge and a second hinge; the first hinge includes a first plate and a second plate, and in the closed state, the first plate and the second plate are connected at a certain angle and correspond to the closed side of the cavity; the first plate is rotatably engaged with the frame hinge; one side of the second hinge is connected to the second plate, and the other side extends in the front-back direction; the fan frame is detachably and fixedly connected to the second hinge.

10. The hinged concealed hinge according to claim 9, characterized in that, The second hinge is mounted on the second plate by a plurality of second locking members; the second plate is provided with a second adjustment hole extending along the height direction and penetrating the second plate; a third adjustment member is provided in the second adjustment hole, the third adjustment member including an eccentrically arranged first column and a second column, the first column being matched and located in the second adjustment hole, and the second column being rotatably connected to the second hinge; a plurality of second locking members are distributed on the upper and lower sides of the third adjustment member, and the second plate is provided with a plurality of second locking holes matching each of the second locking members, the second locking holes extending along the left and right direction, and each of the second locking members passing through the second locking holes and being detachably locked to the second hinge.

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