Hidden hinge

Abstract

The utility model discloses a hidden type hinge which comprises two mounting seats and two connecting rods which are arranged in a crossed mode, each mounting seat is provided with a mounting groove, and a sliding shaft is arranged in each mounting groove in the length direction. The middles of the two connecting rods are rotatably connected through a connecting shaft, the connecting shaft is perpendicular to the sliding shaft, the sliding shaft is sleeved with first shaft sleeves, the same ends of the two connecting rods are rotatably connected to the two mounting bases respectively, the other ends of the two connecting rods are rotatably connected to the two first shaft sleeves respectively, guide columns are arranged on the outer walls of the first shaft sleeves, and guide grooves are formed in the inner side walls of the mounting grooves. The guide column is inserted into the guide groove and can move along the guide groove, and the moving path of the guide column is a spiral line of the sliding shaft. The hidden type hinge provided by the embodiment of the utility model can solve the problems caused by thicker size of the traditional hidden type hinge.

Description

Technical Field

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

[0002] At present, concealed hinges are widely used in the design of household items due to their concealment and aesthetics. Traditional concealed hinges use articulated arms to achieve the opening and closing between a door and a doorframe. However, due to the relatively large size of the articulated arms themselves, the size of the concealed hinges designed is often relatively thick, which may lead to a relatively large gap between the door and the doorframe in some cases, thus affecting the overall aesthetics and may also limit the choices of designers when designing household items, with poor practicality. Content of the Utility Model

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. For this purpose, the utility model provides a concealed hinge, which can solve the problems brought by the relatively thick size of traditional concealed hinges.

[0004] A concealed hinge according to the utility model includes two mounting seats and two cross-arranged connecting rods. The mounting seats are provided with mounting grooves, and sliding shafts are arranged along the length direction in the mounting grooves; the middle parts of the two connecting rods are rotatably connected through a connecting shaft, the connecting shaft is perpendicular to the sliding shaft, a first bushing is sleeved on the sliding shaft, the same ends of the two connecting rods are respectively rotatably connected to the two mounting seats, and the other ends are respectively rotatably connected to the two first bushings. Guide columns are arranged on the outer walls of the first bushings, and guide grooves are arranged on the inner side walls of the mounting grooves. The guide columns are inserted into the guide grooves and can move along the guide grooves. The movement path of the guide columns is a three-dimensional space curve, which extends synchronously along the axial and circumferential directions of the sliding shaft.

[0005] The concealed hinge according to the above embodiments of the utility model has at least the following beneficial effects:

[0006] In the embodiment of the present utility model, the concealed hinge is provided by adopting a connecting rod structure to replace the traditional articulated arm structure. When the user closes the door, the two mounting seats respectively installed on the door and the door frame are brought together. The same ends of the two connecting rods rotate relative to the mounting seats, and the other ends can move along the sliding shaft while rotating through the first bushing, so that the two connecting rods can be brought together; when the user opens the door, the two mounting seats are opened, the same ends of the two connecting rods rotate relative to the mounting seats, and the other ends can move along the sliding shaft while rotating through the first bushing, so that the two connecting rods can be opened. Compared with the mounting seat of the traditional concealed hinge which needs to set a relatively large mounting groove to accommodate the articulated arm, the concealed hinge provided by the embodiment of the present utility model realizes the opening and closing actions of the door by adopting a cross connecting rod structure. The two connecting rods that are brought together only need a relatively small mounting groove to accommodate and conceal, which not only ensures the working performance of the concealed hinge but also significantly reduces the size and thickness, improving the aesthetics and practicality. On the other hand, the concealed hinge provided by the embodiment of the present utility model can guide the first bushing to move along the circumferential direction of the sliding shaft while moving along the axial direction of the sliding shaft by adopting the cooperation of the guiding column and the guiding groove with a three-dimensional curve trajectory in space, so as to guide the two connecting rods to cooperate with the two mounting seats to smoothly complete the closing or separation, realizing the efficient movement of the first bushing on the sliding shaft, thus ensuring the coherence of the user's opening and closing of the door and making the structure of the concealed hinge more reasonable and compact.

[0007] According to some embodiments of the present utility model, the connecting rod is flat, and splicing parts are arranged at both ends of the mutually attached surfaces of the two connecting rods. Second inclined surfaces are arranged on the side walls of the splicing parts, and the two second inclined surfaces are arranged oppositely. Third inclined surfaces are arranged on the opposite side walls of the connecting rod. When the two connecting rods rotate relative to each other, the second inclined surface can be attached to the third inclined surface.

[0008] According to some embodiments of the present utility model, a ball head is arranged at one end of the connecting rod far away from the first bushing, a spherical groove is arranged on the mounting seat, and the ball head is rotatably connected to the spherical groove.

[0009] According to some embodiments of the present utility model, a mounting part is arranged on the inner side wall of the mounting groove, the sliding shaft passes through the mounting part, and one end of the connecting rod far away from the first bushing is rotatably connected to the sliding shaft through a second bushing, and the second bushing is clamped between the mounting part and the inner wall of the mounting groove.

[0010] According to some embodiments of the present utility model, an adjusting seat is slidably arranged in the mounting groove, a connecting groove is arranged on the adjusting seat, the mounting part and the guiding groove are arranged on the inner side wall of the connecting groove, and through holes communicating with the connecting groove are arranged at both ends of the adjusting seat along the axial direction of the sliding shaft, and both ends of the sliding shaft respectively pass through the two through holes.

[0011] According to some embodiments of the present utility model, along the axial direction of the sliding shaft, adjusting lugs are provided at both ends of the adjusting seat, slots are provided on the inner walls at both ends of the mounting groove, the adjusting lugs are inserted into the slots, a first inclined surface is provided at the end of the adjusting lug, an adjusting hole communicating with the slot is provided at the end of the mounting seat, and an eccentric screw cooperating with the first inclined surface is provided in the adjusting hole.

[0012] According to some embodiments of the present utility model, a kidney-shaped guiding hole is provided in the middle of the adjusting lug, the kidney-shaped guiding hole extends along the axial direction of the sliding shaft, a positioning hole communicating with the slot is provided at the end of the mounting seat, and a positioning screw cooperating with the kidney-shaped guiding hole is provided in the positioning hole.

[0013] According to some embodiments of the present utility model, two fixing holes are provided on the adjusting lug, the two fixing holes are symmetrically arranged on both sides of the kidney-shaped guiding hole, two threaded holes communicating with the slot are provided at the end of the mounting seat, the kidney-shaped guiding hole corresponds to the threaded hole one by one, and fixing screws cooperating with the fixing holes are provided in the threaded holes.

[0014] According to some embodiments of the present utility model, along the axial direction of the sliding shaft, a convex strip is provided at the top edge of the inner side wall of the mounting groove, a first clamping groove is provided on the outer wall of the first shaft sleeve, and when the first shaft sleeve rotates, the convex strip can be clamped into the first clamping groove.

[0015] According to some embodiments of the present utility model, a second clamping groove is provided on the outer wall of the second shaft sleeve, and when the second shaft sleeve rotates, the convex strip can be clamped into the second clamping groove.

[0016] Additional aspects and advantages of the present utility model will be given in part in the following description, will become apparent in part from the following description, or will be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The following further describes the present utility model in conjunction with the drawings and embodiments, where:

[0018] Figure 1 is a schematic structural diagram of a hidden hinge in some embodiments of the present utility model when it is opened;

[0019] Figure 2 is a schematic structural diagram of a hidden hinge in some embodiments of the present utility model when it is closed;

[0020] Figure 3 is an exploded view of a hidden hinge in some embodiments of the present utility model;

[0021] Figure 4Structural schematic diagram of the mounting base according to some embodiments of the present utility model;

[0022] Figure 5 Structural schematic diagram of the adjusting base according to some embodiments of the present utility model;

[0023] Figure 6 Partial structural exploded view of the concealed hinge according to some embodiments of the present utility model.

[0024] Among them, reference numerals:

[0025] Mounting base 100; mounting groove 110; sliding shaft 120; guiding groove 130; mounting portion 140; slot 150; adjusting hole 160; positioning hole 170; threaded hole 180; rib 190;

[0026] Connecting rod 200; splicing portion 210; second inclined surface 220; third inclined surface 230;

[0027] First bushing 300; guiding column 310; first rotating shaft 320; first card slot 330;

[0028] Second bushing 400; second rotating shaft 410; second card slot 420;

[0029] Adjusting base 500; connecting groove 510; through hole 520; adjusting lug 530; first inclined surface 531; waist-shaped guiding hole 532; fixing hole 533. Detailed description of the specific implementation

[0030] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation of the present utility model.

[0031] In the description of the present utility model, 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 utility model 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 therefore should not be construed as a limitation of the present utility model.

[0032] In the description of the present utility model, the meaning of "a number of" is one or more, the meaning of "a plurality of" is two or more, and understandings such as "greater than", "less than", "exceeding", etc. do not include the corresponding number, and understandings such as "above", "below", "within", etc. 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.

[0033] In the description of the present utility model, unless otherwise clearly defined, words such as "arrangement", "installation", "connection", etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meaning of the above words in the present utility model in combination with the specific content of the technical solution. In the description of the present utility model, the description referring to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0034] Referring to Figures 1 to 6 , a hidden hinge proposed according to the present utility model 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 120 is arranged along the length direction in the mounting groove 110; the middle parts of the two connecting rods 200 are rotatably connected through a connecting shaft, the connecting shaft is perpendicular to the sliding shaft 120, a first shaft sleeve 300 is sleeved on the sliding shaft 120, the same ends of the two connecting rods 200 are respectively rotatably connected to the two mounting seats 100, and the other ends are respectively rotatably connected to the two first shaft sleeves 300. A guiding column 310 is arranged on the outer wall of the first shaft sleeve 300, a guiding groove 130 is arranged on the inner side wall of the mounting groove 110, the guiding column 310 is inserted into the guiding groove 130 and can move along the guiding groove 130, and the moving path of the guiding column 310 is a three-dimensional space curve and extends synchronously along the axial direction and the circumferential direction of the sliding shaft 120.

[0035] Specifically, the hidden hinge provided by the embodiment of the present utility model replaces the traditional hinge arm structure with a connecting rod 200 structure. When the user closes the door, the two mounting seats 100 respectively installed on the door and the door frame are brought closer to each other. The same ends of the two connecting rods 200 rotate relative to the mounting seats 100, and the other ends can move along the sliding shaft 120 while rotating through the first bushing 300, so that the two connecting rods 200 can be brought closer to each other. When the user opens the door, the two mounting seats 100 move away from each other. The same ends of the two connecting rods 200 rotate relative to the mounting seats 100, and the other ends can move along the sliding shaft 120 while rotating through the first bushing 300, so that the two connecting rods 200 can move away from each other. Compared with the mounting seat 100 of the traditional hidden hinge that needs to be provided with a relatively large mounting groove 110 to accommodate the hinge arm, the hidden hinge provided by the embodiment of the present utility model realizes the opening and closing actions of the door by adopting a cross connecting rod 200 structure. The two mutually-approaching connecting rods 200 only need a relatively small mounting groove 110 to be accommodated and concealed, which ensures the working performance of the hidden hinge while significantly reducing the size and thickness, and improves the aesthetics and practicality. On the other hand, the hidden hinge provided by the embodiment of the present utility model can guide the first bushing 300 to move along the circumferential direction of the sliding shaft 120 while moving along the axial direction of the sliding shaft 120 by adopting the cooperation of the guide post 310 and the guide groove 130 with a three-dimensional space curve trajectory, so as to guide the two connecting rods 200 to cooperate with the two mounting seats 100 to smoothly complete the mutual approach or separation, realizing the efficient movement of the first bushing 300 on the sliding shaft 120, thereby ensuring the coherence of the user's opening and closing of the door and making the structure of the hidden hinge more reasonable and compact.

[0036] Further, referring to Figure 1 and Figure 3 , according to some embodiments of the present utility model, the connecting rod 200 is flat. The two ends of the mutually-adjacent surfaces of the two connecting rods 200 are both provided with splicing parts 210. The side wall of the splicing part 210 is provided with a second inclined surface 220. The two second inclined surfaces 220 are oppositely arranged. The opposite side walls of the connecting rod 200 are both provided with third inclined surfaces 230. When the two connecting rods 200 rotate relative to each other, the second inclined surface 220 can be attached to the third inclined surface 230.

[0037] It can be understood that by setting the connecting rod 200 to be flat, the thickness of the hidden hinge can be further reduced, and by increasing the contact area between the two connecting rods 200, the two connecting rods 200 can fit better during relative rotation, increasing the overall structural stability, reducing the shaking and noise during use, and improving the smoothness and coherence of the user's door opening and closing. Through the cooperation of the second inclined surface 220 and the third inclined surface 230, the two connecting rods 200 can be better positioned and fitted when approaching each other, increasing the overall structural stability, and can play a role of mutual limitation, avoiding excessive displacement, and ensuring the working performance of the connecting rod 200.

[0038] Furthermore, according to some embodiments of the present invention, a ball head is provided at one end of the connecting rod 200 away from the first bushing 300, a spherical groove is provided on the mounting seat 100, and the ball head is rotatably connected to the spherical groove. Through the cooperation of the ball head and the spherical groove, when the two mounting seats 100 approach or separate from each other, the end of the connecting rod 200 away from the first bushing 300 can rotate relative to the mounting seat 100.

[0039] It should be noted that in addition to using the cooperation of the ball head and the spherical groove, other structural methods can also be used to achieve the rotatable connection between the connecting rod 200 and the mounting seat 100, which can be designed according to actual usage requirements.

[0040] Furthermore, referring to Figure 1 and Figure 3 , according to some embodiments of the present invention, a mounting portion 140 is provided on the inner side wall of the mounting groove 110, the sliding shaft 120 passes through the mounting portion 140, and one end of the connecting rod 200 away from the first bushing 300 is rotatably connected to the sliding shaft 120 through a second bushing 400, thereby realizing the rotatable connection between the connecting rod 200 and the mounting seat 100. The second bushing 400 is clamped between the mounting portion 140 and the inner wall of the mounting groove 110, so as to be able to fix the position of the second bushing 400 in the axial direction of the sliding shaft 120.

[0041] Furthermore, referring to Figure 3 , according to some embodiments of the present invention, a first rotating shaft 320 perpendicular to the sliding shaft 120 is provided on the outer wall of the first bushing 300, a second rotating shaft 410 perpendicular to the sliding shaft 120 is provided on the outer wall of the second bushing 400, and both ends of the connecting rod 200 are respectively rotatably connected to the first rotating shaft 320 and the second rotating shaft 410.

[0042] It should be noted that the position of the guide post 310 on the first bushing 300 can be designed according to actual usage requirements. For example, in an embodiment of the present utility model, in the radial direction of the first bushing 300, the guide post 310 and the first rotating shaft 320 are oppositely arranged on both sides of the first bushing 300; and in the axial direction of the first bushing 300, the guide post 310 and the first rotating shaft 320 are respectively located on both sides of the first bushing 300, but it is not limited thereto and can be designed according to actual usage requirements.

[0043] It should be noted that the movement path of the first guide post 310 can be designed according to actual usage requirements. For example, the movement path of the first guide post 310 can be a spiral line, then the movement path of the first guide post 310 changes regularly both in the axial direction and the circumferential direction of the sliding shaft 120, that is, the movement speed of the first guide post 310 is constant both in the axial direction and the circumferential direction of the sliding shaft 120; it is also possible to design the movement path of the first guide post 310 to change irregularly in the axial direction of the sliding shaft 120, so that the movement speed of the first guide post 310 changes in the axial direction of the sliding shaft 120; or by designing the movement path of the first guide post 310 to change irregularly in the circumferential direction of the sliding shaft 120, so that the movement speed of the first guide post 310 changes in the circumferential direction of the sliding shaft 120 to meet different usage requirements.

[0044] Furthermore, referring to Figure 1 and Figure 3 , according to some embodiments of the present utility model, an adjusting seat 500 is slidably arranged in the installation groove 110. The adjusting seat 500 is provided with a connecting groove 510. The inner side wall of the connecting groove 510 is provided with an installation portion 140 and a guide groove 130. Along the axial direction of the sliding shaft 120, through holes 520 communicating with the connecting groove 510 are arranged at both ends of the adjusting seat 500, and both ends of the sliding shaft 120 are respectively inserted through the two through holes 520.

[0045] It can be understood that during the actual installation process of the concealed hinge, there may be a deviation in the installation positions of the door and the mounting seat 100 on the door frame in height, or for other reasons, it is necessary to set the adjusting seat 500 to adjust the positional relationship between the two mounting seats 100 in height. It should be noted that in the embodiments of the present utility model, both mounting seats 100 can be provided with the adjusting seat 500, or only one mounting seat 100 can be provided with the adjusting seat 500.

[0046] On the other hand, through holes 520 are provided at both ends of the adjusting seat 500 to cooperate with the installation part 140 to penetrate through the adjusting seat 500. During installation, first place the first bushing 300 and the second bushing 400 in the corresponding positions of the connecting groove 510, then insert the sliding shaft 120 through one through hole 520, and sequentially pass through the first bushing 300, the installation part 140 and the second bushing 400, and finally pass through the other through hole 520. The operation is simple and convenient, and the structure is simple.

[0047] Similarly, in some embodiments of the present invention, when only one mounting seat 100 is provided with an adjusting seat 500, through holes 520 communicating with the mounting groove 110 may also be provided at both ends of the other mounting seat 100. Both ends of the sliding shaft 120 are respectively inserted into the two through holes 520. During installation, first place the first bushing 300 and the second bushing 400 in the corresponding positions of the mounting groove 110, then insert the sliding shaft 120 through one through hole 520, and sequentially pass through the first bushing 300, the installation part 140 and the second bushing 400, and finally pass through the other through hole 520. The operation is simple and convenient, and the structure is simple.

[0048] Further, referring to Figure 3 and Figure 6 , according to some embodiments of the present invention, along the axial direction of the sliding shaft 120, adjusting lugs 530 are provided at both ends of the adjusting seat 500, slot holes 150 are provided on the inner walls at both ends of the mounting groove 110, the adjusting lugs 530 are inserted into the slot holes 150, a first inclined surface 531 is provided at the end of the adjusting lug 530, an adjusting hole 160 communicating with the slot hole 150 is provided at the end of the mounting seat 100, and an eccentric screw cooperating with the first inclined surface 531 is provided in the adjusting hole 160. Through the cooperation of the first inclined surface 531 and the eccentric screw, the user can fine-tune the position of the adjusting seat 500 relative to the mounting seat 100 in the height direction by tightening or loosening the eccentric screw to adapt to the deviation of the mounting position on the door or door frame, so as to ensure the normal operation of the connecting rod 200.

[0049] Further, referring to Figure 3 and Figure 6 , according to some embodiments of the present invention, a waist-shaped guiding hole 532 is provided in the middle of the adjusting lug 530, the waist-shaped guiding hole 532 extends along the axial direction of the sliding shaft 120, a positioning hole 170 communicating with the slot hole 150 is provided at the end of the mounting seat 100, and a positioning screw cooperating with the waist-shaped guiding hole 532 is provided in the positioning hole 170. Through the waist-shaped guiding hole 532 and the cooperating positioning screw, precise control of the position of the adjusting seat 500 is achieved, and the skew phenomenon caused by inaccurate positioning is avoided.

[0050] Further, referring to Figure 3 and Figure 6, according to some embodiments of the present utility model, the adjusting lug 530 is provided with two fixing holes 533, and the two fixing holes 533 are symmetrically arranged on both sides of the kidney-shaped guiding hole 532. The end of the mounting seat 100 is provided with two threaded holes 180 communicating with the slot 150, and the kidney-shaped guiding hole 532 corresponds to the threaded hole 180 one by one. A fixing screw cooperating with the fixing hole 533 is arranged in the threaded hole 180. By using the cooperation of the fixing hole 533 and the threaded hole 180 to fix the position of the adjusting seat 500, the phenomenon of loosening or deviation during use is avoided, the use performance is ensured, and the overall structural stability is improved.

[0051] It should be noted that in the embodiments of the present utility model, mounting holes for fixing and mounting on the door or door frame are also provided at both ends of the mounting seat 100, which will not be elaborated here.

[0052] Furthermore, referring to Figure 4 and Figure 6 , according to some embodiments of the present utility model, along the axial direction of the sliding shaft 120, a rib 190 is provided at the top edge of the inner side wall of the mounting groove 110. A first clamping groove 330 is provided on the outer wall of the first shaft sleeve 300. When the first shaft sleeve 300 rotates, the rib 190 can be clamped into the first clamping groove 330. A second clamping groove 420 is provided on the outer wall of the second shaft sleeve 400. When the second shaft sleeve 400 rotates, the rib 190 can be clamped into the second clamping groove 420.

[0053] It can be understood that through the cooperation of the first clamping groove 330 and the rib 190, a limiting effect can be achieved, avoiding excessive displacement of the first shaft sleeve 300 during rotation, ensuring the working performance, and when installing the first shaft sleeve 300, a positioning effect can be achieved through the cooperation of the first clamping groove 330 and the rib 190. Just clamp the rib 190 into the first clamping groove 330, which simplifies the installation process and improves the installation efficiency. The working principle of the second clamping groove 420 is the same as that of the above-mentioned first clamping groove 330, which will not be elaborated here.

[0054] The embodiments of the present utility model have been described in detail above with reference to the drawings. However, the present utility model is not limited to the above embodiments, and various changes can be made without departing from the gist of the present utility model within the scope of knowledge possessed by those of ordinary skill in the art.

Claims

1. A concealed hinge, characterized in that, Comprising: Two mounting seats, each mounting seat is provided with a mounting groove, and a sliding shaft is arranged along the length direction in the mounting groove; Two cross-arranged connecting rods, the middle parts of the two connecting rods are rotatably connected through a connecting shaft, the connecting shaft is perpendicular to the sliding shaft, a first bushing is sleeved on the sliding shaft, the same ends of the two connecting rods are respectively rotatably connected to the two mounting seats, and the other ends are respectively rotatably connected to the two first bushings. A guiding column is arranged on the outer wall of the first bushing, and a guiding groove is arranged on the inner side wall of the mounting groove. The guiding column is inserted into the guiding groove and can move along the guiding groove. The moving path of the guiding column is a three-dimensional space curve, which extends synchronously along the axial direction and the circumferential direction of the sliding shaft.

2. The concealed hinge according to claim 1, wherein The connecting rod is flat-shaped, and splicing parts are arranged at both ends of the mutually attached surfaces of the two connecting rods. A second inclined surface is arranged on the side wall of the splicing part, and the two second inclined surfaces are arranged oppositely. Third inclined surfaces are arranged on the opposite side walls of the connecting rod. When the two connecting rods rotate relative to each other, the second inclined surface can be attached to the third inclined surface.

3. The concealed hinge according to claim 1, characterized in that, A ball head is arranged at one end of the connecting rod far from the first bushing, and a spherical groove is arranged on the mounting seat. The ball head is rotatably connected to the spherical groove.

4. The concealed hinge according to claim 1, characterized in that, An installation part is arranged on the inner side wall of the mounting groove. The sliding shaft passes through the installation part. One end of the connecting rod far from the first bushing is rotatably connected to the sliding shaft through a second bushing. The second bushing is clamped between the installation part and the inner wall of the mounting groove.

5. The concealed hinge according to claim 4, characterized in that, An adjusting seat is slidably arranged in the mounting groove. The adjusting seat is provided with a connecting groove. The inner side wall of the connecting groove is provided with the installation part and the guiding groove. Along the axial direction of the sliding shaft, through holes communicating with the connecting groove are arranged at both ends of the adjusting seat. The two ends of the sliding shaft respectively pass through the two through holes.

6. The concealed hinge according to claim 5, characterized in that, Along the axial direction of the sliding shaft, adjusting lugs are arranged at both ends of the adjusting seat. Slots are arranged on the inner walls at both ends of the mounting groove. The adjusting lugs are inserted into the slots. A first inclined surface is arranged at the end of the adjusting lug. An adjusting hole communicating with the slot is arranged at the end of the mounting seat. An eccentric screw cooperating with the first inclined surface is arranged in the adjusting hole.

7. The concealed hinge according to claim 6, wherein A kidney-shaped guiding hole is arranged in the middle of the adjusting lug. The kidney-shaped guiding hole extends along the axial direction of the sliding shaft. A positioning hole communicating with the slot is arranged at the end of the mounting seat. A positioning screw cooperating with the kidney-shaped guiding hole is arranged in the positioning hole.

8. The concealed hinge according to claim 7, characterized in that, Two fixing holes are arranged on the adjusting lug. The two fixing holes are symmetrically arranged on both sides of the kidney-shaped guiding hole. Two threaded holes communicating with the slot are arranged at the end of the mounting seat. The kidney-shaped guiding hole corresponds to the threaded hole one by one. A fixing screw cooperating with the fixing hole is arranged in the threaded hole.

9. The concealed hinge according to claim 4, characterized in that, Along the axial direction of the sliding shaft, a convex strip is arranged at the top edge of the inner side wall of the mounting groove. A first clamping groove is arranged on the outer wall of the first bushing. When the first bushing rotates, the convex strip can be clamped into the first clamping groove.

10. The concealed hinge according to claim 9, characterized in that, A second clamping groove is arranged on the outer wall of the second bushing. When the second bushing rotates, the convex strip can be clamped into the second clamping groove.

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