Adjusting assembly and hidden hinge with same

Abstract

The utility model provides an adjusting assembly and a hidden hinge with the adjusting assembly. The adjusting assembly comprises a first adjusting block and a second adjusting block, the first adjusting block is connected to a hinge seat, the second adjusting block is connected to the first adjusting block, and a first positioning tooth part is arranged on the lower surface of the second adjusting block; a positioning boss is arranged at the bottom of the containing cavity in an upward protruding mode, a second positioning tooth part matched with the first positioning tooth part is arranged on the upper surface of the positioning boss, and the first positioning tooth part and the second positioning tooth part are connected in an engaged mode. The utility model further provides a hidden hinge. The hidden hinge comprises a fan part hinge seat, a frame part hinge seat and a swing arm assembly. The adjusting assemblies are hinged to the two ends of one side of the swing arm assembly correspondingly. According to the adjusting assembly, through mutual cooperation of the first positioning tooth part and the second positioning tooth part, the position of the adjusting assembly relative to the hinge seat can be flexibly adjusted, and the structural stability can be improved. According to the concealed hinge, through the arrangement of the adjusting assembly, the position can be flexibly adjusted, and the concealed hinge has good structural stability.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of door and window hardware fittings, in particular to an adjusting assembly and a concealed hinge with the same. BACKGROUND

[0002] In the existing hinge device of door and window, the adjusting precision and the structural stability of the adjusting assembly are often limited, causing the instability of the hinge performance of door and window.

[0003] In the prior art, much attention is paid to the adjusting precision of the adjusting assembly, but the improvement of the structural stability is less, and there is a lack of a device capable of effectively adjusting the installation depth and the buffering force of the hinge of door and window and having higher adjusting precision and stability.

[0004] Therefore, there is an urgent need for a new adjusting assembly and a concealed hinge to solve the above problems. CONTENT OF THE INVENTION

[0005] In order to overcome the defects of the prior art, the present application provides an adjusting assembly and a concealed hinge with the same, which can realize precise adjusting function while ensuring stability; in particular, the adjusting assembly is applied to the concealed hinge, which can effectively improve the structural stability and adjust the installation depth and the buffering force of the hinge of door and window.

[0006] In a first aspect, the present application provides an adjusting assembly, which is arranged in a hinge seat, the hinge seat is provided with a containing cavity, and the containing cavity is provided with the adjusting assembly; wherein the adjusting assembly comprises a first adjusting block and a second adjusting block, the first adjusting block is connected to the hinge seat, the second adjusting block is connected to the first adjusting block, and the lower surface of the second adjusting block is provided with a first positioning tooth portion; the bottom of the containing cavity is upwardly protrudingly provided with a positioning boss, the upper surface of the positioning boss is provided with a second positioning tooth portion matched with the first positioning tooth portion, the first positioning tooth portion and the second positioning tooth portion are engagedly connected, and the tooth bar arrangement direction of the first positioning tooth portion and the second positioning tooth portion is consistent with the length direction of the hinge seat.

[0007] In an alternative implementation manner, the upper surface of the positioning boss is protrudingly provided with a transverse protruding strip, the lower surface of the second adjusting block is provided with a transverse recess matched with the transverse protruding strip, and the transverse protruding strip and the transverse recess are slidingly matched.

[0008] In an alternative implementation manner, the adjusting assembly comprises a longitudinal screw rod, and the second adjusting block is downwardly and vertically provided with a longitudinal waist groove; the first adjusting block comprises a connecting portion and a positioning portion which are perpendicular to each other, and the positioning portion is arranged in parallel with the lower surface of the second adjusting block; the positioning portion is provided with a positioning hole, and the longitudinal screw rod is downwardly and vertically penetrated into the positioning hole and engagedly connected with the positioning hole through the longitudinal waist groove.

[0009] In an alternative implementation, the first adjusting block is provided with a longitudinal protrusion, the second adjusting block is provided with a longitudinal groove matched with the longitudinal protrusion, the longitudinal protrusion and the longitudinal groove are in sliding fit, and the longitudinal protrusion is perpendicular to the transverse protrusion.

[0010] In an alternative implementation, the adjusting assembly includes a transverse screw, the second adjusting block is provided with a transverse slot, the locating boss is provided with a fixing hole, and the transverse screw is penetrated by the transverse slot and engaged to the fixing hole.

[0011] In a second aspect, the application provides a concealed hinge for connecting a door leaf and a door frame. Specifically, the concealed hinge includes a leaf hinge seat for being mounted on the door leaf, a frame hinge seat for being mounted on the door frame, and a swing arm assembly hinged to the leaf hinge seat and the frame hinge seat; the frame hinge seat is provided with a first accommodating cavity, and two ends of one side of the swing arm assembly are respectively hinged with first adjusting assemblies, and the first adjusting assemblies are accommodated in the first accommodating cavity; wherein the first adjusting assembly is any one of the adjusting assemblies in the alternative implementations of the first aspect.

[0012] In an alternative implementation, the leaf hinge seat is provided with a second accommodating cavity; the other side of the swing arm assembly is hinged with a buffer cylinder, one end of the buffer cylinder is connected with a buffer adjusting assembly for adjusting the buffer force of the buffer cylinder, and the other end of the buffer cylinder is connected with a depth adjusting assembly for adjusting the installation depth; the buffer cylinder, the buffer adjusting assembly and the depth adjusting assembly are accommodated in the second accommodating cavity.

[0013] In an alternative implementation, the depth adjusting assembly includes a depth adjusting block, a first depth screw and a first fixing screw, the depth adjusting block is connected with one end of the buffer cylinder, the first depth screw is clamped with the depth adjusting block and engaged with the frame hinge seat, and the first fixing screw is engaged with the depth adjusting block and the frame hinge seat.

[0014] In an alternative implementation, the buffer adjusting assembly includes a buffer adjusting block, an adjusting gear, a control gear, a second depth screw and a second fixing screw, the buffer adjusting block is connected with the other end of the buffer cylinder, the adjusting gear is clamped with the adjusting end of the buffer cylinder, the control gear is rotationally arranged on the side of the buffer adjusting block away from the buffer cylinder and engaged with the adjusting gear, the second depth screw is clamped with the buffer adjusting block and engaged with the frame hinge seat, and the second fixing screw is engaged with the buffer adjusting block and the frame hinge seat.

[0015] In an alternative implementation, the swing arm assembly comprises a first connecting arm, a second connecting arm and a third connecting arm, two sides of one end of the first connecting arm are respectively hinged to the buffer adjusting block and the depth adjusting block, the other end of the first connecting arm is hinged to one end of the third connecting arm, the arm body of the first connecting arm is hinged to the arm body of the second connecting arm, one end of the second connecting arm is hinged to the buffer cylinder, the other end of the second connecting arm is respectively hinged to two first adjusting assemblies, and the other end of the third connecting arm is respectively hinged to two first adjusting assemblies.

[0016] According to the technical solutions provided by the foregoing implementation, at least the following beneficial effects are achieved:

[0017] (1) The adjusting assembly of the present application can flexibly adjust the position of the adjusting assembly relative to the hinge seat and improve the structural stability through the cooperation of the first positioning tooth part and the second positioning tooth part.

[0018] (2) The adjusting assembly of the present application can play a smooth guiding role and facilitate horizontal accurate adjustment through the cooperation of the horizontal protrusions and the horizontal grooves.

[0019] (3) The adjusting assembly of the present application can play a smooth guiding role and facilitate vertical accurate adjustment through the cooperation of the vertical protrusions and the vertical grooves.

[0020] (4) The adjusting assembly of the present application can realize four-way flexible adjustment and positioning through the cooperation of the vertical screw rod and the vertical waist groove and the cooperation of the horizontal screw rod and the horizontal groove.

[0021] (5) The concealed hinge of the present application can flexibly adjust the position and has good structural stability through the arrangement of the adjusting assembly.

[0022] (6) The concealed hinge of the present application can stably and smoothly open and close the door leaf and has a buffering effect through the cooperation of the buffer cylinder and the swing arm assembly.

[0023] (7) The concealed hinge of the present application can adjust the buffering force of the buffer cylinder to adapt to different use requirements and accurately adjust the installation position to improve the tightness of the door leaf through the cooperation of the buffer adjusting assembly and the depth adjusting assembly. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0025] Figure 1 The mounting schematic diagram of the adjusting assembly provided by an embodiment of the present application is shown in the figure.

[0026] Figure 2 An exploded view of the adjustment assembly according to an embodiment of the present application.

[0027] Figure 3 A bottom view of the adjustment assembly according to an embodiment of the present application.

[0028] Figure 4 A structural view of the hinge seat according to an embodiment of the present application.

[0029] Figure 5 An exploded view of the first and second adjustment blocks of the adjustment assembly according to an embodiment of the present application.

[0030] Figure 6 A structural view of the concealed hinge according to an embodiment of the present application.

[0031] Figure 7 An exploded view of the concealed hinge according to an embodiment of the present application.

[0032] Figure 8 A structural view of the internal components of the concealed hinge according to an embodiment of the present application.

[0033] Figure 9 A partial structural view of the concealed hinge according to an embodiment of the present application, showing the structure of the buffer cylinder, the buffer adjustment assembly, and the depth adjustment assembly.

[0034] Figure 10 A partial structural view of the concealed hinge according to an embodiment of the present application, showing the structure of the buffer cylinder, the swing arm assembly, and other components.

[0035] Explanation of Reference Signs:

[0036] 1. Adjustment assembly; 11. First adjustment block; 111. Connecting portion; 112. Positioning portion; 113. Positioning hole; 114. Longitudinal protrusion; 115. Shaft hole; 12. Second adjustment block; 121. First positioning tooth portion; 122. Transverse groove; 123. Longitudinal waist groove; 124. Longitudinal groove; 125. Transverse slot; 13. Longitudinal screw; 14. Transverse screw; 2. Hinge seat; 21. Accommodation cavity; 22. Positioning boss; 221. Second positioning tooth portion; 222. Transverse protrusion; 223. Fixing hole;

[0037] 100, frame hinge seat; 101, first accommodating cavity; 102, first adjusting assembly; 200, fan hinge seat; 201, second accommodating cavity; 300, swing arm assembly; 301, first connecting arm; 302, second connecting arm; 303, third connecting arm; 304, buffer cylinder; 305, hinge lug; 400, buffer adjusting assembly; 401, buffer adjusting block; 402, adjusting gear; 403, control gear; 404, second depth screw rod; 405, second fixed screw rod; 406, anti-dropping part; 407, gasket; 500, depth adjusting assembly; 501, depth adjusting block; 502, first depth screw rod; 503, first fixed screw rod. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0039] Herein, the terms "first", "second", and the like are used only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0040] In addition, herein, the orientation terms such as "upper", "lower", and the like are defined with respect to the orientation of the structure shown in the drawings, and it should be understood that these directional terms are relative concepts, which are used for relative description and clarification, and can be changed accordingly according to the change of the orientation of the structure.

[0041] Embodiment 1

[0042] Please refer to Figures 1 to 5 An adjusting assembly 1 is provided in an embodiment of the present application, which can be used in a hinge product of a door leaf.

[0043] In combination with Figure 1 As shown in the drawings, in the present application, the adjusting assembly 1 can be arranged in a hinge seat 2, and the hinge seat 2 is provided with an accommodating cavity 21, and the adjusting assembly 1 is arranged in the accommodating cavity 21.

[0044] Specifically, in combination with Figure 2As shown, in the embodiment, the adjusting assembly 1 comprises a first adjusting block 11 connected to the hinged seat 2 and a second adjusting block 12 connected to the first adjusting block 11, and the lower surface of the second adjusting block 12 is provided with a first positioning tooth portion 121; the bottom of the accommodating cavity 21 is upwardly protrudingly provided with a positioning boss 22, and the upper surface of the positioning boss 22 is provided with a second positioning tooth portion 221 matched with the first positioning tooth portion 121, and the first positioning tooth portion 121 and the second positioning tooth portion 221 are engagedly connected, and the direction of the toothed strips of the first positioning tooth portion 121 and the second positioning tooth portion 221 is consistent with the length direction of the hinged seat 2.

[0045] Through the cooperation of the first positioning tooth portion 121 and the second positioning tooth portion 221, the adjusting assembly 1 can be accurately adjusted in the hinged seat 2, and has good structural stability, so as to realize the adjusting function of the door and window hinge.

[0046] As shown in Figure 3 and Figure 4 As shown, in the embodiment, in order to further increase the stability and adjusting accuracy of the adjusting assembly 1, the upper surface of the positioning boss 22 is protrudingly provided with a transverse protruding strip 222, the lower surface of the second adjusting block 12 is provided with a transverse recess 122 matched with the transverse protruding strip 222, and the transverse protruding strip 222 and the transverse recess 122 are slidingly matched. Through the cooperation of the transverse protruding strip 222 and the transverse recess 122, the transverse guiding adjustment and auxiliary positioning can be realized.

[0047] As shown in Figure 2 , Figure 3 and Figure 5 As shown, the adjusting assembly 1 comprises a longitudinal screw rod 13, and the second adjusting block 12 is provided with a longitudinal waist groove 123 from top to bottom; the first adjusting block 11 comprises a connecting portion 111 and a positioning portion 112 perpendicular to each other; the positioning portion 112 is provided parallel to the lower surface of the second adjusting block 12; the positioning portion 112 is provided with a positioning hole 113, and the longitudinal screw rod 13 is downwardly penetrated through the longitudinal waist groove 123 to the positioning hole 113 and is engagedly connected with the positioning hole 113.

[0048] Through the cooperation of the longitudinal screw rod 13 and the longitudinal waist groove 123, the second adjusting block 12 can be accurately adjusted and positioned in the longitudinal direction.

[0049] As shown in Figure 5 As shown in the embodiment, the first adjusting block 11 is provided with a longitudinal protruding strip 114, the second adjusting block 12 is provided with a longitudinal recess 124 matched with the longitudinal protruding strip 114, the longitudinal protruding strip 114 and the longitudinal recess 124 are slidingly matched, and the direction of the longitudinal protruding strip 114 is perpendicular to the direction of the transverse protruding strip 222.

[0050] The sliding engagement between the longitudinal protrusion 114 and the longitudinal groove 124 can serve as a longitudinal guide for adjustment and auxiliary positioning.

[0051] Combination Figure 2 , Figure 4 and Figure 5 As shown, in this embodiment, the adjustment component 1 includes a transverse screw 14, the second adjustment block 12 is provided with a transverse groove 125, the positioning boss 22 is provided with a fixing hole 223, and the transverse screw 14 is connected to the fixing hole 223 by passing through the transverse groove 125 and engaging with it.

[0052] The first adjusting block 11 and the second adjusting block 12 can be precisely adjusted and positioned laterally by the cooperation of the transverse screw 14 and the transverse groove 125.

[0053] Combination Figure 1 As shown, in order to facilitate hinge connection with other components, in this embodiment, the connecting part 111 is provided with a shaft hole 115 for hinged shaft on the side facing away from the positioning part 112.

[0054] Example 2

[0055] Combination Figures 6 to 10 As shown, this application also provides a concealed hinge for connecting a door leaf and a door frame.

[0056] Combination Figure 6 As shown, in one embodiment, the concealed hinge includes a sash hinge seat 200 for mounting on a door sash, a frame hinge seat 100 for mounting on a door frame, and a swing arm assembly 300 hinged to the sash hinge seat 200 and the frame hinge seat 100.

[0057] Combination Figure 7 As shown, in one embodiment, the frame hinge seat 100 is provided with a first receiving cavity 101, and the two ends of one side of the swing arm assembly 300 are respectively hinged with a first adjustment assembly 102, and the first adjustment assembly 102 is received in the first receiving cavity 101; wherein, the first adjustment assembly 102 adopts the adjustment assembly provided in Embodiment 1 of this application.

[0058] By adjusting the first adjustment component 102, the installation precision and depth of the door leaf can be adjusted to meet different installation requirements.

[0059] Combination Figure 7 As shown, in this embodiment, the fan-shaped hinge seat 200 is provided with a second receiving cavity 201; a buffer cylinder 304 is hinged to the other side of the swing arm assembly 300, one end of the buffer cylinder 304 is connected to a buffer adjustment component 400 for adjusting the buffering force of the buffer cylinder 304, and the other end of the buffer cylinder 304 is connected to a depth adjustment component 500 for adjusting the installation depth; the buffer cylinder 304, the buffer adjustment component 400 and the depth adjustment component 500 are housed in the second receiving cavity 201.

[0060] Through the cooperation of these components, the buffering degree of the buffer cylinder 304 and the installation depth of the dark hinge connecting component can be effectively adjusted to improve the opening and closing speed and tightness of the door leaf.

[0061] In combination Figure 8 and Figure 9 As shown in the drawings, in the embodiment, the depth adjustment assembly 500 includes a depth adjustment block 501, a first depth screw 502, and a first fixing screw 503. The depth adjustment block 501 is connected to one end of the buffer cylinder 304. The first depth screw 502 is engaged with the depth adjustment block 501 and is meshingly connected with the frame hinge seat 100. The first fixing screw 503 is meshingly connected with the depth adjustment block 501 and the frame hinge seat 100.

[0062] The buffer adjustment assembly 400 includes a buffer adjustment block 401, an adjustment gear 402, a control gear 403, a second depth screw 404, and a second fixing screw 405. The buffer adjustment block 401 is connected to the other end of the buffer cylinder 304. The adjustment gear 402 is engaged with the adjustment end of the buffer cylinder 304. The control gear 403 is rotationally arranged on the side of the buffer adjustment block 401 away from the buffer cylinder 304 and is meshingly connected with the adjustment gear 402. The second depth screw 404 is engaged with the buffer adjustment block 401 and is meshingly connected with the frame hinge seat 100. The second fixing screw 405 is meshingly connected with the buffer adjustment block 401 and the frame hinge seat 100.

[0063] Through the depth screw and the fixing screw, the installation depth of the depth adjustment assembly 500 and the buffer adjustment assembly 400 relative to the hinge seat can be adjusted, and then the tightness distance of the leaf hinge seat 200 and the frame hinge seat 100 is adjusted to improve the tightness of the door leaf closing.

[0064] In combination Figure 8 and Figure 10 As shown in the drawings, in the embodiment, the swing arm assembly 300 includes a first connecting arm 301, a second connecting arm 302, and a third connecting arm 303. The two sides of one end of the first connecting arm 301 are respectively hingedly connected with the buffer adjustment block 401 and the depth adjustment block 501. The other end of the first connecting arm 301 is hingedly connected with one end of the third connecting arm 303. The arm body of the first connecting arm 301 is hingedly connected with the arm body of the second connecting arm 302. One end of the second connecting arm 302 is hingedly connected with the buffer cylinder 304. The other end of the second connecting arm 302 is hingedly connected with two first adjustment assemblies 102 on both sides. The other end of the third connecting arm 303 is hingedly connected with two first adjustment assemblies 102 on both sides.

[0065] Among them, the buffer cylinder 304 used in the present application can be realized by using the existing technology, and the internal buffer adjustment structure is not particularly limited and described in the present application.

[0066] In order to facilitate the hinge connection of the buffer cylinder 304 and the swing arm assembly 300, in the embodiment, a hinge lug 305 is integrally formed outside the cylinder body of the buffer cylinder 304, and the hinge lug 305 is hingedly connected to the second connecting arm 302.

[0067] In the embodiment, shafts or other components are used to achieve the hinge connection between the connecting arms of the swing arm assembly 300 and between the connecting arms and the adjusting assemblies.

[0068] In combination Figure 9 As shown, in order to prevent the control gear 403 from being displaced or falling off during use, the outer side wall of the buffer adjusting block 401 extends to form a anti-falling part 406, which cooperates with the outer side wall of the buffer adjusting block 401 to form a limiting enclosure for the control gear 403.

[0069] In combination Figure 10 As shown, in order to prevent the control gear 403 and the adjusting gear 402 from being damaged by friction with the buffer adjusting block 401 during use, in the embodiment, a gasket 407 is arranged on the side of the buffer adjusting block 401 close to the control gear 403. Specifically, the gasket 407 can adopt a "U" type structure for convenient insertion.

[0070] The adjusting assembly and the hidden hinge provided by the embodiment of the application are described in detail above, the principle and implementation manner of the application are illustrated by using specific embodiments, and the above description is only used to help understand the method of the application and its core mechanism; meanwhile, for those skilled in the art, according to the idea of the application, the specific embodiments and application range will be changed, and the above description should not be understood as a limitation on the application.

Claims

1. An adjustment assembly, characterized by: The adjusting assembly is arranged in a hinged seat, and the hinged seat is provided with a containing cavity in which the adjusting assembly is arranged; The adjusting assembly comprises a first adjusting block and a second adjusting block, the first adjusting block is connected to the hinged seat, the second adjusting block is connected to the first adjusting block, and the lower surface of the second adjusting block is provided with a first positioning tooth portion; the bottom of the containing cavity is provided with a positioning boss upwardly protruding, the upper surface of the positioning boss is provided with a second positioning tooth portion matched with the first positioning tooth portion, the first positioning tooth portion and the second positioning tooth portion are engagedly connected, and the tooth bar arrangement direction of the first positioning tooth portion and the second positioning tooth portion is consistent with the length direction of the hinged seat.

2. The adjustment assembly of claim 1, wherein: The upper surface of the positioning boss is provided with a transverse protruding strip protruding upwardly, the lower surface of the second adjusting block is provided with a transverse recess matched with the transverse protruding strip, and the transverse protruding strip and the transverse recess are slidingly matched.

3. The adjustment assembly of claim 2, wherein: The adjusting assembly comprises a longitudinal screw, and the second adjusting block is provided with a longitudinal waist groove penetrating from top to bottom; the first adjusting block comprises a connecting portion and a positioning portion which are perpendicular to each other, and the positioning portion is arranged in parallel with the lower surface of the second adjusting block; The positioning portion is provided with a positioning hole, and the longitudinal screw penetrates from the longitudinal waist groove to the positioning hole downwardly and is engagedly connected with the positioning hole.

4. The adjustment assembly of claim 3, wherein: The first adjusting block is provided with a longitudinal protruding strip, the second adjusting block is provided with a longitudinal recess matched with the longitudinal protruding strip, the longitudinal protruding strip and the longitudinal recess are slidingly matched, and the direction of the longitudinal protruding strip is perpendicular to the direction of the transverse protruding strip.

5. The adjustment assembly of claim 3, wherein: The adjusting assembly comprises a transverse screw, the second adjusting block is provided with a transverse groove, the positioning boss is provided with a fixing hole, and the transverse screw penetrates from the transverse groove and is engagedly connected to the fixing hole.

6. The adjustment assembly of claim 3, wherein: The side of the connecting portion away from the positioning portion is provided with a shaft hole for a hinged shaft rod.

7. A concealed hinge for connecting a door leaf and a door frame, characterized in that: The concealed hinge comprises a leaf portion hinged seat for being mounted on a door leaf, a frame portion hinged seat for being mounted on a door frame, and a swing arm assembly hinged to the leaf portion hinged seat and the frame portion hinged seat; the frame portion hinged seat is provided with a first containing cavity, and two ends of one side of the swing arm assembly are respectively hinged with first adjusting assemblies, and the first adjusting assemblies are contained in the first containing cavity; The first adjusting assembly is the adjusting assembly of any one of claims 1-6.

8. The blind hinge according to claim 7, wherein: The leaf portion hinged seat is provided with a second containing cavity; the other side of the swing arm assembly is hinged with a buffer cylinder, one end of the buffer cylinder is connected and provided with a buffer adjusting assembly for adjusting the buffer force of the buffer cylinder, and the other end of the buffer cylinder is connected and provided with a depth adjusting assembly for adjusting the mounting depth; The buffer cylinder, the buffer adjusting assembly and the depth adjusting assembly are contained in the second containing cavity.

9. The blind hinge according to claim 8, wherein: The depth adjusting assembly comprises a depth adjusting block, a first depth screw and a first fixing screw, the depth adjusting block is connected to one end of the buffer cylinder, the first depth screw is clamped with the depth adjusting block and is engagedly connected with the frame portion hinged seat, and the first fixing screw is engagedly connected with the depth adjusting block and the frame portion hinged seat; The buffer adjusting assembly comprises a buffer adjusting block, an adjusting gear, a control gear, a second depth screw rod and a second fixing screw rod, the buffer adjusting block is connected with the other end of the buffer cylinder, the adjusting gear is clamped with the adjusting end of the buffer cylinder, the control gear is rotationally arranged on the side of the buffer adjusting block away from the buffer cylinder and is meshingly connected with the adjusting gear, the second depth screw rod is clamped with the buffer adjusting block and is meshingly connected with the frame hinged seat, and the second fixing screw rod is meshingly connected with the buffer adjusting block and the frame hinged seat.

10. The blind hinge according to claim 9, wherein: The swing arm assembly comprises a first connecting arm, a second connecting arm and a third connecting arm, two sides of one end of the first connecting arm are respectively hingedly connected with the buffer adjusting block and the depth adjusting block, the other end of the first connecting arm is hingedly connected with one end of the third connecting arm, the arm body of the first connecting arm is hingedly connected with the arm body of the second connecting arm, one end of the second connecting arm is hingedly connected with the buffer cylinder, two sides of the other end of the second connecting arm are respectively hingedly connected with two first adjusting assemblies, and two sides of the other end of the third connecting arm are respectively hingedly connected with two first adjusting assemblies.

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