Hidden hinge

Abstract

The hidden hinge comprises two mounting seats and two connecting rods which are arranged in a crossed mode, mounting grooves are formed in the mounting seats, the mounting grooves are fixedly connected with sliding shafts, and the sliding shafts are arranged in the length directions of the mounting grooves; the middles of the two connecting rods are rotationally connected through a connecting shaft, the connecting shaft is perpendicular to the sliding shafts, the two ends of each connecting rod are rotationally connected with a first shaft sleeve and a second shaft sleeve correspondingly, the two sliding shafts are sleeved with the first shaft sleeve and the second shaft sleeve correspondingly, each sliding shaft is provided with a first guide part, and the first shaft sleeve can slide along the first guide part. The moving path of the first shaft sleeve is a three-dimensional curve and synchronously extends in the axial direction and the circumferential direction of the sliding shaft. According to the hidden hinge, the structural size can be reduced, and the use experience of a user can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of hinges, and particularly relates to a concealed hinge. Background Art

[0002] A concealed hinge is a common hardware fitting for connecting furniture components such as doors and windows, mainly used to achieve the rotational connection between the door and the door frame, and between the window and the window sill. The existing concealed hinge uses hinge arms to open and close the doors and windows. However, due to the large size of the hinge arms themselves, the concealed hinge itself has a large thickness, which limits the scope of use of the concealed hinge, affects the overall aesthetics, and is not conducive to improving the user experience. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. For this purpose, the present invention provides a concealed hinge that can reduce the structural size and help improve the user experience.

[0004] The concealed hinge according to the first aspect embodiment of the present invention includes two mounting seats and two cross-arranged connecting rods. The mounting seat is provided with a mounting groove, and a sliding shaft is fixedly connected to the mounting groove. The sliding shaft is arranged along the length direction of the mounting groove. The middle parts of the two connecting rods are rotatably connected by a connecting shaft, the connecting shaft is perpendicular to the sliding shaft, the two ends of the connecting rod are respectively rotatably connected with a first shaft sleeve and a second shaft sleeve, the first shaft sleeve and the second shaft sleeve are respectively sleeved on the two sliding shafts, the sliding shaft is provided with a first guiding portion, the first shaft sleeve can slide along the first guiding portion, and the moving path of the first shaft sleeve is a three-dimensional curve, which synchronously extends along the axial direction and the circumferential direction of the sliding shaft.

[0005] The concealed hinge according to the embodiment of the present invention has at least the following beneficial effects: The mounting seat is provided with a mounting groove, the sliding shaft is fixed in the mounting groove, and the sliding shaft is arranged along the length direction of the mounting groove. The middle parts of the two connecting rods are rotatably connected by a connecting shaft, the first shaft sleeve and the second shaft sleeve are respectively rotatably connected to the two ends of the connecting rod. By providing a first guiding portion on the sliding shaft and making the first shaft sleeve slide on the first guiding portion, when the two mounting seats rotate relative to each other, the first shaft sleeve can rotate on the sliding shaft and can slide along the axial direction of the sliding shaft, so as to drive the two connecting rods to rotate around the connecting shaft, and enable the two connecting rods to pull the two mounting seats together or open, realizing the opening and closing actions, and can reduce the space. Through the first guiding portion, the first shaft sleeve can be guided to move along a three-dimensional curve trajectory, so that the first shaft sleeve can rotate circumferentially along the sliding shaft and move axially along the sliding shaft at the same time, thereby enabling the first shaft sleeve to move efficiently, and the cross-connecting rod structure can significantly reduce the size and thickness, and only a smaller mounting groove is required to accommodate and hide, enhancing the structural compactness, ensuring the working performance of the concealed hinge while improving the aesthetics and practicality.

[0006] According to some embodiments of the present invention, along the axial direction of the sliding shaft, the position of the second bushing is fixed relative to the sliding shaft.

[0007] According to some embodiments of the present invention, the sliding shaft is provided with a second guiding portion. The first guiding portion and the second guiding portion are symmetrically arranged about the center of the sliding shaft. The second bushing is capable of sliding along the second guiding portion. Along the axial direction of the sliding shaft, the movement path of the second bushing is opposite to that of the first bushing.

[0008] According to some embodiments of the present invention, the sliding shaft includes a first shaft body and a second shaft body. The first shaft body and the second shaft body are respectively arranged at two ends of the installation groove, and the first guiding portion is arranged on the first shaft body, and the second guiding portion is arranged on the second shaft body.

[0009] According to some embodiments of the present invention, the installation groove is further provided with two adjusting seats. The two adjusting seats are respectively connected to two ends of the installation groove. The adjusting seat is provided with an anti-rotation hole, and the first shaft body and the second shaft body are respectively inserted into the two anti-rotation holes.

[0010] According to some embodiments of the present invention, at least one first plane is provided on the inner side wall of the anti-rotation hole, and at least one second plane is provided on the side walls of the first shaft body and the second shaft body. The first plane abuts against the second plane.

[0011] According to some embodiments of the present invention, the installation groove is further provided with a support member. The support member is fixedly connected between the two adjusting seats, and the first shaft body and the second shaft body are both arranged between the adjusting seat and the support member.

[0012] According to some embodiments of the present invention, an adjusting lug is provided at the end of the adjusting seat. Slots are provided on the inner walls at two ends of the installation groove. The adjusting lug is inserted into the slot. The adjusting lug is provided with a first guiding portion, and the thickness of the first guiding portion gradually decreases in a direction away from the adjusting seat. The installation seat is provided with a first adjusting hole communicating with the slot, and a first fastener is inserted through the first adjusting hole. The first fastener can abut against the first guiding portion.

[0013] According to some embodiments of the present invention, the adjusting lug is provided with two second guiding portions. The two second guiding portions are respectively arranged on both sides of the first guiding portion. The thickness of the second guiding portion gradually decreases in a direction away from the first guiding portion. The installation seat is provided with two second adjusting holes communicating with the slot. The second adjusting holes correspond to the second guiding portions one by one. A second fastener is inserted through the second adjusting hole. The second fastener can abut against the second guiding portion.

[0014] According to some embodiments of the present invention, the support member is provided with reinforcing ribs, and the reinforcing ribs are arranged along the length direction of the mounting groove.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present invention. Brief Description of the Drawings

[0016] The present invention will be further described below in conjunction with the drawings and embodiments, where: Figure 1 is a schematic diagram of a hidden hinge according to an embodiment of the present invention; Figure 2 is an exploded schematic diagram of a hidden hinge according to an embodiment of the present invention; Figure 3 is a schematic diagram of a mounting seat of a hidden hinge according to an embodiment of the present invention; Figure 4 is Figure 3 a partial enlarged view of part A of

[0017] Reference Signs: Mounting seat 100, mounting groove 110, sliding shaft 111, first shaft body 112, second shaft body 113, first guiding portion 114, second guiding portion 115, second plane 116, slot 117, first adjusting hole 118, second adjusting hole 119, adjusting seat 120, anti-rotation hole 121, first plane 122, adjusting ear 123, first guiding portion 124, second guiding portion 125, first mounting hole 126, support member 130, reinforcing rib 131, second mounting hole 132; Link rod 200, first shaft sleeve 210, second shaft sleeve 220. Detailed Description of the Embodiments

[0018] Embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention and should not be construed as limiting the present invention.

[0019] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as up, down, front, back, left, right, etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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.

[0020] In the description of the present invention, "several" means one or more, "multiple" means more than two, and understandings such as "greater than", "less than", and "exceeding" do not include the corresponding number, while understandings such as "above", "below", and "within" include the corresponding number. If there is a description of "first" and "second", it is only for the purpose of distinguishing technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0021] In the description of the present invention, unless otherwise clearly defined, words such as "set", "installed", and "connected" should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

[0022] It can be understood that the hidden hinge of this embodiment can be applied to the opening and closing connection members of mechanisms such as doors and windows, and the following will be described by taking the door as an example.

[0023] It can be understood that with reference to Figures 1 to 3 , the hidden hinge of the present invention includes two mounting seats 100 and two cross-arranged connecting rods 200. The mounting seat 100 is provided with a mounting groove 110, and a sliding shaft 111 is fixedly connected to the mounting groove 110. The sliding shaft 111 is arranged along the length direction of the mounting groove 110; the middle parts of the two connecting rods 200 are rotatably connected by a connecting shaft, the connecting shaft is perpendicular to the sliding shaft 111, and the two ends of the connecting rod 200 are respectively rotatably connected with a first bushing 210 and a second bushing 220. The first bushing 210 and the second bushing 220 are respectively sleeved on the two sliding shafts 111. The sliding shaft 111 is provided with a first guiding portion 114, and the first bushing 210 can slide along the first guiding portion 114. The moving path of the first bushing 210 is a three-dimensional curve and extends synchronously along the axial and circumferential directions of the sliding shaft 111.

[0024] The mounting base 100 is provided with a mounting groove 110, and the sliding shaft 111 is fixed in the mounting groove 110 and arranged along the length direction of the mounting groove 110. The middle parts of the two connecting rods 200 are rotatably connected through a connecting shaft. The first sleeve 210 and the second sleeve 220 are respectively rotatably connected to the two ends of the connecting rod 200. The first sleeve 210 and the second sleeve 220 on the connecting rod 200 are respectively sleeved on the sliding shafts 111 of the two mounting bases 100. By providing a first guiding portion 114 on the sliding shaft 111 and enabling the first sleeve 210 to slide on the first guiding portion 114, when the two mounting bases 100 rotate relative to each other, the first sleeve 210 can rotate on the sliding shaft 111 and can slide axially along the sliding shaft 111, so as to drive the two connecting rods 200 to rotate around the connecting shaft, enabling the two connecting rods 200 to pull the two mounting bases 100 to close or open relative to each other, realizing the opening and closing actions, and reducing the space. Through the first guiding portion 114, the first sleeve 210 can be guided to move along a three-dimensional curve trajectory, enabling the first sleeve 210 to rotate circumferentially along the sliding shaft 111 and move axially along the sliding shaft 111 at the same time, so that the first sleeve 210 can move efficiently, and the cross connecting rod 200 can significantly reduce the size and thickness, and only a smaller mounting groove 110 is needed to accommodate and hide it, enhancing the structural compactness, ensuring the working performance of the hidden hinge while improving the aesthetics and practicality.

[0025] Among them, the two mounting bases 100 are respectively fixedly connected to the door frame and the door, and the two mounting bases 100 are connected by two cross-arranged connecting rods 200. When the user closes the door, the two mounting bases 100 respectively installed on the door and the door frame close to each other, and the two connecting rods 200 rotate relative to the mounting bases 100 through the first sleeve 210 and the second sleeve 220. At the same time, the first sleeve 210 and the second sleeve 220 can move away from each other along the sliding shaft 111, so that the two connecting rods 200 rotate and close; when the user opens the door, the two mounting bases 100 move away from each other, and the two connecting rods 200 rotate relative to the mounting bases 100 through the first sleeve 210 and the second sleeve 220. At the same time, the first sleeve 210 and the second sleeve 220 can move towards each other along the sliding shaft 111, so that the two connecting rods 200 rotate and open. By connecting the two mounting bases 100 with two cross-arranged connecting rods 200, the thickness of the hidden hinge can be reduced, the structure of the hidden hinge can be made compact, and the overall aesthetics can be improved.

[0026] It should be noted that the first guiding portion 114 and the first sleeve 210 are in sliding connection, so that when the first sleeve 210 rotates on the sliding shaft 111, the first sleeve 210 can move circumferentially and axially along the sliding shaft 111 at the same time, so as to drive the two connecting rods 200 to rotate around the connecting shaft. Among them, the second sleeve 220 can rotate on the sliding shaft 111, the second sleeve 220 can be fixed axially on the sliding shaft 111, or can move axially along the sliding shaft 111, which is not limited herein.

[0027] Specifically, the first guiding portion 114 may be a groove provided on the side wall of the sliding shaft 111, and the shape of the groove is a three-dimensional curve. The first bushing 210 is correspondingly provided with a convex block, and the convex block is slidably connected to the groove, so that when the first bushing 210 slides on the first guiding portion 114, the first bushing 210 can move synchronously along the axial direction and the circumferential direction of the sliding shaft 111.

[0028] Wherein, the convex block may also be provided on the first guiding portion 114, and the groove is provided on the first bushing 210, which is not limited herein.

[0029] It can be understood that the groove and the convex block may be an internal thread and an external thread respectively, so that the first bushing 210 can move along a three-dimensional curve when sliding on the first guiding portion 114.

[0030] Specifically, referring to Figure 1 , both the first bushing 210 and the second bushing 220 are rotatably connected to the connecting rod 200, and the axes of the first bushing 210 and the second bushing 220 are both perpendicular to the axis of the connecting shaft.

[0031] It should be noted that a first rotating shaft perpendicular to the connecting shaft is provided on the outer wall of the first bushing 210, and a second rotating shaft perpendicular to the connecting shaft is provided on the outer wall of the second bushing 220. The two ends of the connecting rod 200 are respectively rotatably connected to the first rotating shaft and the second rotating shaft.

[0032] It can be understood that referring to Figures 1 to 3 , along the axial direction of the sliding shaft 111, the position of the second bushing 220 is fixed relative to the sliding shaft 111. The second bushing 220 is fixed in the axial direction of the sliding shaft 111, so that the second bushing 220 can rotate around the sliding shaft 111 but cannot move along the axial direction of the sliding shaft 111, which simplifies the movement of the second bushing 220. When the two connecting rods 200 are brought closer together or separated from each other, the second bushing 220 can only perform rotational movement, while the first bushing 210 can move along the circumferential and axial directions of the sliding shaft 111, thereby being able to drive the two connecting rods 200 to rotate around the connecting shaft. While ensuring the working performance of the hidden hinge, the wear caused by the movement of the second bushing 220 is reduced, and the service life of the hidden hinge is improved.

[0033] It should be noted that a stop block (not shown in the drawings) may be provided in the axial direction of the sliding shaft 111, and the stop block can abut against both ends of the second bushing 220, so as to limit the second bushing 220 in the axial direction of the sliding shaft 111, which is not limited herein.

[0034] It can be understood that referring to Figures 1 to 3, a sliding shaft 111 is provided with a second guiding portion 115. The first guiding portion 114 and the second guiding portion 115 are symmetrically arranged about the center of the sliding shaft 111. The second shaft sleeve 220 can slide along the second guiding portion 115. Along the axial direction of the sliding shaft 111, the moving path of the second shaft sleeve 220 is opposite to that of the first shaft sleeve 210. By providing the second guiding portion 115 on the sliding shaft 111 and making the second shaft sleeve 220 slide on the second guiding portion 115, when the two mounting seats 100 rotate relative to each other, both the first shaft sleeve 210 and the second shaft sleeve 220 rotate on the sliding shaft 111, and the first shaft sleeve 210 and the second shaft sleeve 220 can move closer to or away from each other along the axial direction of the sliding shaft 111, enabling the first shaft sleeve 210 and the second shaft sleeve 220 to move away from or towards each other more efficiently, balancing the forces on the two link rods 200, helping to reduce wear and noise, enhancing the stability and durability of the concealed hinge, and improving reliability.

[0035] It should be noted that the sliding path of the second shaft sleeve 220 on the second guiding portion 115 is a three-dimensional curve. When the two mounting seats 100 rotate relative to each other, the first shaft sleeve 210 and the second shaft sleeve 220 rotate in the same direction along the circumferential direction of the sliding shaft 111, and the first shaft sleeve 210 and the second shaft sleeve 220 move away from or towards each other along the axial direction of the sliding shaft 111, thereby being able to drive the two link rods 200 to rotate simultaneously and improving the moving efficiency of the link rods 200.

[0036] Specifically, referring to Figure 2 , the sliding shaft 111 includes a first shaft body 112 and a second shaft body 113. The first shaft body 112 and the second shaft body 113 are respectively arranged at both ends of the mounting groove 110, and the first guiding portion 114 is arranged on the first shaft body 112, and the second guiding portion 115 is arranged on the second shaft body 113. By arranging the first shaft body 112 and the second shaft body 113 at both ends of the mounting groove 110 respectively, and arranging the first guiding portion 114 on the first shaft body 112 and the second guiding portion 115 on the second shaft body 113, the manufacturing difficulty of the sliding shaft 111 can be reduced, which helps to reduce production costs, and can also improve the machining accuracy of the first guiding portion 114 and the second guiding portion 115, enabling the first shaft sleeve 210 and the second shaft sleeve 220 to move smoothly on the first guiding portion 114 and the second guiding portion 115 respectively, and improving the reliability of the concealed hinge.

[0037] Specifically, the first shaft body 112 and the second shaft body 113 are coaxially arranged so that the lengths of the two link rods 200 are equal, thereby being able to balance the rotating lever arms of the two link rods 200, helping to reduce the structural size of the concealed hinge, enhancing the overall aesthetic appearance, and improving the user experience.

[0038] Specifically, referring to Figure 3 and Figure 4, the installation groove 110 is also provided with two adjusting seats 120. The two adjusting seats 120 are respectively connected to both ends of the installation groove 110. The adjusting seat 120 is provided with a rotation-preventing hole 121, and the first shaft body 112 and the second shaft body 113 are respectively inserted into the two rotation-preventing holes 121. The two adjusting seats 120 are respectively connected to both ends of the installation groove 110. By providing the rotation-preventing hole 121 in the adjusting seat 120, the first shaft body 112 and the second shaft body 113 can be respectively inserted into the rotation-preventing holes 121 on the two adjusting seats 120, so as to provide a more stable support point, reduce the deviation or looseness of the first shaft body 112 and the second shaft body 113 caused by long-term use or external force, avoid the wear of the first shaft body 112 and the second shaft body 113 and the mounting seat 100, and further enhance the overall stability and durability of the hidden hinge.

[0039] It should be noted that the adjusting seat 120 can be fixed in the installation groove 110 by means of fastener connection, snap connection, etc., so that the adjusting seat 120 can be stable in the installation groove 110; the shape of the rotation-preventing hole 121 can be a non-circular positioning hole, and the shapes of the first shaft body 112 and the second shaft body 113 are matched with the shape of the rotation-preventing hole 121 to fix the positions of the first shaft body 112 and the second shaft body 113, which is not limited herein.

[0040] Specifically, referring to Figure 3 and Figure 4 , at least one first plane 122 is provided on the inner side wall of the rotation-preventing hole 121, and at least one second plane 116 is provided on the side walls of the first shaft body 112 and the second shaft body 113, and the first plane 122 abuts against the second plane 116. By providing at least one first plane 122 on the inner side wall of the rotation-preventing hole 121, and the first shaft body 112 and the second shaft body 113 are correspondingly provided with at least one second plane 116, when the first shaft body 112 or the second shaft body 113 is inserted into the rotation-preventing hole 121, the first plane 122 can abut against the second plane 116, preventing the relative rotation of the first shaft body 112 or the second shaft body 113 in the rotation-preventing hole 121, ensuring the stability and reliability of the hidden hinge during the opening and closing processes, and avoiding loosening or damage caused by the rotation of the first shaft body 112 or the second shaft body 113, and extending the service life of the hinge.

[0041] In addition, the number of the first plane 122 and the second plane 116 can be set to be multiple. The cooperation of the multiple first planes 122 and the multiple second planes 116 can increase the contact area between the first shaft body 112 or the second shaft body 113 and the adjusting seat 120, thereby enhancing the connection strength between the first shaft body 112 or the second shaft body 113 and the adjusting seat 120, improving the bearing capacity of the first shaft body 112 or the second shaft body 113, reducing the possibility of damage and failure of the adjusting seat 120, and improving the reliability of the hidden hinge.

[0042] Specifically, refer to Figure 1 and Figure 2 The mounting groove 110 is also provided with a support member 130, and the support member 130 is fixedly connected between the two adjustment seats 120, and the first shaft body 112 and the second shaft body 113 are arranged between the adjustment seat 120 and the support member 130. The support member 130 is fixedly connected between the two adjustment seats 120, and the first shaft body 112 and the second shaft body 113 are arranged between the adjustment seat 120 and the support member 130, so that the adjustment seat 120 and the support member 130 cooperate to provide axial constraints for the first shaft body 112 and the second shaft body 113, effectively preventing the first shaft body 112 and the second shaft body 113 from axial movement or loosening under long-term use or external force, making the positions of the first shaft body 112 and the second shaft body 113 stable, preventing the first shaft body 112 or the second shaft body 113 from escaping from the anti-rotation hole 121, and improving the reliability of the hidden hinge.

[0043] Specifically, refer to Figure 3 and Figure 4 The end of the adjustment seat 120 is provided with an adjustment lug 123, and both ends of the inner wall of the mounting groove 110 are provided with a slot 117. The adjustment lug 123 is inserted into the slot 117. The adjustment lug 123 is provided with a first guide portion 124, and the thickness of the first guide portion 124 gradually decreases in the direction away from the adjustment seat 120. The mounting seat 100 is provided with a first adjustment hole 118 connected to the slot 117. The first adjustment hole 118 is penetrated by a first fastener, and the first fastener (not shown in the drawings) can abut against the first guide portion 124. The adjustment lug 123 is provided at the end of the adjustment seat 120, and both ends of the inner wall of the mounting groove 110 are provided with a slot 117. The adjustment lug 123 is arranged in the slot 117 to limit the position of the adjustment seat 120 in the mounting groove 110, thereby reducing the position shaking of the adjustment seat 120. By providing a first guide portion 124 on the adjustment lug 123 and opening a first adjustment hole 118 connected to the slot 117 in the mounting seat 100, when the first fastener is inserted into the first adjustment hole 118, the first fastener can abut against the first guide portion 124, so that the first fastener and the first guide portion 124 cooperate to fine-tune the position of the adjustment seat 120 relative to the mounting seat 100 in the height direction to adapt to the deviation of the installation position on the door or door frame, thereby ensuring that the connecting rod 200 can work normally.

[0044] It should be noted that the first fastener may be a bolt, a screw, etc., and the first fastener is threadedly connected to the first adjustment hole 118 so that the first fastener can be screwed into or out of the first adjustment hole 118. The first guide portion 124 is conical in shape so that when the first fastener abuts against the first guide portion 124, the first fastener can push the first guide portion 124 to slide in an inclined direction, thereby adjusting the position of the adjustment seat 120 relative to the mounting seat 100.

[0045] Specifically, referring to Figure 3 and Figure 4 , the adjusting lug 123 is provided with two second guiding portions 125, the two second guiding portions 125 are respectively arranged on both sides of the first guiding portion 124, the thickness of the second guiding portion 125 gradually decreases in the direction away from the first guiding portion 124, the mounting seat 100 is provided with two second adjusting holes 119 communicating with the slot 117, the second adjusting holes 119 and the second guiding portions 125 are in one-to-one correspondence, a second fastener (not shown in the drawings) is inserted through the second adjusting hole 119, and the second fastener can abut against the second guiding portion 125. The two second guiding portions 125 are arranged on both sides of the first guiding portion 124, and the thickness of the second guiding portion 125 gradually decreases in the direction away from the first guiding portion 124. The mounting seat 100 is provided with two second adjusting holes 119 communicating with the slot 117. By arranging the second fastener to abut against the second guiding portion 125, the second fastener can push the adjusting seat 120 to slide in the slot 117, so as to improve the convenience of adjustment, adapt to the deviation of the installation position on the door or door frame, and ensure the normal operation of the connecting rod 200.

[0046] It should be noted that the second fastener can be a bolt, a screw, etc. The second fastener is threadedly connected to the second adjusting hole 119 so that the second fastener can be screwed into or out of the second adjusting hole 119. The shape of the second guiding portion 125 is also conical, so that when the second fastener abuts against the second guiding portion 125, the second fastener can push the second guiding portion 125 to slide in an inclined direction, thereby being able to adjust the position of the adjusting seat 120 relative to the mounting seat 100.

[0047] Specifically, referring to Figure 3 , the support member 130 is provided with a reinforcing rib 131, and the reinforcing rib 131 is arranged along the length direction of the mounting groove 110. By arranging the reinforcing rib 131 on the support member 130 and making it arranged along the length direction of the mounting groove 110, the structural strength and stability of the support member 130 are improved, so that the support member 130 can absorb more axial forces when the first bushing 210 and the second bushing 220 rotate on the first guiding portion 114 and the second guiding portion 115 respectively, and can effectively disperse and resist the stress concentration under the action of external forces, preventing the support member 130 from deforming or being damaged due to excessive force. The reliability of the concealed hinge is improved.

[0048] Specifically, referring to Figure 3, the adjusting seat 120 is provided with a first mounting hole 126, and the support member 130 is provided with a second mounting hole 132. The first mounting hole 126 is docked with the second mounting hole 132, and the first mounting hole 126 and the second mounting hole 132 are connected by a third fastener (not shown in the drawings). The adjusting seat 120 is provided with a first mounting hole 126, and the support member 130 is provided with a second mounting hole 132. By setting the first mounting hole 126 to be docked with the second mounting hole 132 and enabling the third fastener to sequentially pass through the first mounting hole 126 and the second mounting hole 132, the adjusting seat 120 and the support member 130 can be stably connected together, which not only simplifies the installation process, improves the assembly efficiency, but also facilitates subsequent maintenance and replacement, and helps to extend the service life of the concealed hinge.

[0049] It should be noted that the third fastener can be a bolt, a screw, etc., and is not limited herein.

[0050] The embodiments of the present invention have been described in detail above with reference to the drawings. However, 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 scope of those of ordinary skill in the art.

Claims

1. Concealed hinge, characterized in that, Comprising: Two mounting seats, the mounting seats are provided with mounting grooves, the mounting grooves are fixedly connected with sliding shafts, and the sliding shafts are arranged along the length direction of the mounting grooves; Two cross-arranged connecting rods, the middle parts of the two connecting rods are rotationally connected through a connecting shaft, the connecting shaft is perpendicular to the sliding shaft, the two ends of the connecting rod are respectively rotationally connected with a first bushing and a second bushing, the first bushing and the second bushing are respectively sleeved on the two sliding shafts, the sliding shaft is provided with a first guiding portion, the first bushing can slide along the first guiding portion, and the moving path of the first bushing is a three-dimensional curve, synchronously extending along the axial direction and the circumferential direction of the sliding shaft.

2. The hidden hinge according to claim 1, wherein Along the axial direction of the sliding shaft, the position of the second bushing is fixed relative to the sliding shaft.

3. The concealed hinge according to claim 1, wherein The sliding shaft is provided with a second guiding portion, the first guiding portion and the second guiding portion are symmetrically arranged with respect to the center of the sliding shaft, the second bushing can slide along the second guiding portion, and along the axial direction of the sliding shaft, the moving path of the second bushing is opposite to the moving path of the first bushing.

4. The hidden hinge according to claim 3, characterized in that, The sliding shaft comprises a first shaft body and a second shaft body, the first shaft body and the second shaft body are respectively arranged at both ends of the mounting groove, and the first guiding portion is arranged on the first shaft body, and the second guiding portion is arranged on the second shaft body.

5. The hidden hinge according to claim 4, characterized in that, The mounting groove is further provided with two adjusting seats, the two adjusting seats are respectively connected to both ends of the mounting groove, the adjusting seats are provided with anti-rotation holes, and the first shaft body and the second shaft body are respectively inserted into the two anti-rotation holes.

6. The concealed hinge according to claim 5, wherein, At least one first plane is provided on the inner side wall of the anti-rotation hole, and at least one second plane is provided on the side wall of the first shaft body and the second shaft body, and the first plane abuts against the second plane.

7. The hidden hinge according to claim 5, characterized in that, The mounting groove is further provided with a support member, the support member is fixedly connected between the two adjusting seats, and the first shaft body and the second shaft body are both arranged between the adjusting seat and the support member.

8. The hidden hinge according to claim 7, wherein An adjusting lug is provided at the end of the adjusting seat, slots are provided on the inner walls at both ends of the mounting groove, the adjusting lug is inserted into the slot, the adjusting lug is provided with a first guiding portion, the thickness of the first guiding portion gradually decreases in the direction away from the adjusting seat, the mounting seat is provided with a first adjusting hole communicating with the slot, and a first fastener is inserted through the first adjusting hole, and the first fastener can abut against the first guiding portion.

9. The hidden hinge according to claim 8, wherein, The adjusting lug is provided with two second guiding portions, the two second guiding portions are respectively arranged on both sides of the first guiding portion, the thickness of the second guiding portion gradually decreases in the direction away from the first guiding portion, the mounting seat is provided with two second adjusting holes communicating with the slot, the second adjusting holes correspond to the second guiding portions one by one, and a second fastener is inserted through the second adjusting hole, and the second fastener can abut against the second guiding portion.

10. The hidden hinge according to claim 7, characterized in that, The support member is provided with reinforcing ribs, and the reinforcing ribs are arranged along the length direction of the mounting groove.

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