CN111219114A

CN111219114A - Angle-adjustable hinge

Info

Publication number: CN111219114A
Application number: CN201811428832.8A
Authority: CN
Inventors: 山下直伸
Original assignee: Koyo Giken KK
Current assignee: Koyo Giken KK
Priority date: 2018-11-27
Filing date: 2018-11-27
Publication date: 2020-06-02

Abstract

The invention relates to the technical field of furniture hinges, and discloses an angle-adjustable hinge which comprises a first connecting arm, a second connecting arm, a gear part, a connecting shaft and a floating wedge part, wherein the gear part can rotate around the axis of a through hole, the connecting shaft is arranged along the axis direction of the through hole of the gear part, one end of the connecting shaft is detachably connected with the second connecting arm, and when the hinge is installed, the gear part, the connecting shaft and the floating wedge part are assembled with the first connecting arm in advance to form an integral installation, so that the installation error of the connecting shaft and the gear part can be avoided, the second connecting arm can be ensured to be smoothly connected onto the first connecting arm, the installation is convenient, and the installation precision and the yield are improved; and when later maintenance, the second connecting arm can be directly detached from the connecting shaft for maintenance, replacement and assembly.

Description

Angle-adjustable hinge

Technical Field

The invention relates to the technical field of furniture hinges, in particular to an angle-adjustable hinge.

Background

An angularly adjustable hinge is applied to furniture such as a sofa, a chair, a bed, a headrest, a footrest, a swing door, etc., for holding a member which swings (tilts) up and down within a predetermined angular range so as to adjust a tilt angle. For example, an angularly adjustable hinge is applied to the sofa S as shown in fig. 1 to pivot the backrest S1 toward the seat S0 so as to be freely inclined rearward.

The angle adjustable hinge generally comprises a first component connected with the sofa and a second component connected with the sofa backrest to swing around the first component, the existing second component is detachably inserted into the gear component on the first component through a matching shaft part thereon, generally, the matching shaft part is integrally formed with the second component, such as an angle adjustable hinge (publication number is CN101892781B) disclosed by the applicant in 11/12.2014, as shown in FIG. 2, the housing part of the first component 1 of the angle adjustable hinge is provided with a gear component 4, the gear component 4 is provided with a non-circular through hole 23 so that the gear component rotates around the axis of the through hole, the second component 2 is provided with a matching shaft part 20 detachably inserted into the through hole 23 of the gear component 4, but when the hinge is actually installed, the second component 2 is assembled with the

first components

1 and 4, due to errors of machining and installation, the matching shaft part 20 of the second component 2 cannot be smoothly inserted into the non-circular through hole 23 of the gear component 4, or the matching shaft part of the second component 2 and the non-circular through hole 23 of the gear component cannot be completely matched and attached during installation, and the installation precision is low, so that the gear component and the floating wedge component cannot be meshed or separated, and the whole hinge cannot be used.

Disclosure of Invention

In view of the above problems in the prior art, an object of the present invention is to provide an angle-adjustable hinge, which is convenient to install, high in installation accuracy, and easy to maintain.

In order to solve the above problems, the present invention provides an angle adjustable hinge, including a first connecting arm, a second connecting arm, a gear member, a connecting shaft, and a floating wedge member;

the surfaces of two sides of the gear part are provided with bulges with sliding peripheral surfaces, and the gear part is provided with a through hole which runs through the surface of the bulge along the axial direction of the gear part so that the gear part can rotate around the axis of the through hole;

the first link arm includes a pair of opposing plate portions and a first attachment portion interposed between the pair of opposing plate portions, the gear member is provided between the pair of opposing plate portions and the first attachment portion, each of the opposing plate portions has a holding hole in which a sliding outer peripheral surface of the boss portion is slidably fitted; the connecting shaft is inserted into the through hole of the gear part along the axis direction and is matched with the through hole in shape, and one end of the connecting shaft is detachably connected with the second connecting arm;

the first link arm having a wedge sliding surface thereon to form a wedge-shaped space between the wedge sliding surface and the arcuate outer tooth surface of the gear member as viewed in the axial direction;

the floating wedge member has an inner surface side which is an arc-shaped inner tooth surface engaged with an outer tooth surface of the gear member and an outer surface side which is a contact surface contacting a wedge sliding surface, and is movable in the space, the contact surface of the floating wedge member contacts the wedge sliding surface, the floating wedge member can achieve engagement or disengagement of the inner tooth surface with or from the outer tooth surface during the movement, and the swing of the gear member in one direction toward the first connecting arm is restricted by a wedge action of the floating wedge member between the outer tooth surface and the wedge sliding surface.

Further preferably, an internal thread hole is formed in the end portion of the connecting shaft, a through hole matched with the connecting shaft in shape is formed in the second connecting arm, and one end of the connecting shaft penetrates through the through hole and is in threaded connection through a fastening piece.

Further preferably, the connecting shaft is fixedly connected with the gear part.

Further preferably, the connecting shaft and the gear part are integrally formed.

Further preferably, the connecting shaft is connected with the through hole in an interference fit manner.

Further preferably, the through hole is a circular through hole or a non-circular through hole;

when the through hole is a circular through hole, the connecting shaft is fixedly connected with the gear part.

Further preferably, the projection is circular or quasi-circular with rounded corners.

Further preferably, a window portion is formed on the pair of opposing plate portions, and a part of the wedge sliding surface is formed on the window portion.

Further preferably, an elastic member is provided between the pair of opposing plate portions and the first attachment portion for elastically urging the floating wedge member toward the gear member.

Further preferably, one end of the elastic member is connected to the first attaching portion, and the other end faces the gear member and abuts against an outer surface side of the floating wedge member.

Further preferably, the floating wedge component comprises a floating wedge component body and connecting columns penetrating and protruding out of two sides of the floating wedge component body, and two protruding ends of the connecting columns can be arranged in the window in a floating mode.

Further preferably, the inner side of the opposite plate portion is provided with a gasket, the gasket extends outwards to form a grading contact portion, and the outer peripheral wall of the connecting column is provided with a sliding outer peripheral surface which is in contact with the grading contact portion to realize meshing or separation of the inner tooth surface and the outer tooth surface.

Further preferably, the window portion is wedge-shaped or arc-shaped.

The invention provides an angle-adjustable hinge, which comprises a first connecting arm, a second connecting arm, a connecting shaft, a gear part and a floating wedge part, wherein the connecting shaft is inserted in a through hole of the gear part along the axis direction; and when later maintenance, the second connecting arm can be directly detached from the connecting shaft for maintenance, replacement and assembly.

Drawings

FIG. 1 is a schematic view of an application of an angularly adjustable hinge;

FIG. 2 is a schematic exploded view of a conventional adjustable angle hinge;

FIG. 3 is a schematic view of the construction of the adjustable angle hinge of the present invention;

FIG. 4 is a schematic exploded view of a first embodiment of the adjustable angle hinge of the present invention;

FIG. 5 is a schematic exploded view of the essential parts of a first embodiment of the angle adjustable hinge of the present invention;

FIG. 6 is an explanatory enlarged view of a main part of a first embodiment of the angle adjustable hinge of the present invention;

FIG. 7 is an exploded view of the gear member and the connecting shaft of the present invention;

FIG. 8 is a schematic structural view of a second embodiment of the angle adjustable hinge of the present invention;

FIG. 9 is a schematic view showing a swing state of the second embodiment of the angle adjustable hinge of the present invention;

FIG. 10 is a schematic view showing another swing state of the second embodiment of the angle adjustable hinge of the present invention;

FIG. 11 is a schematic structural view of a floating wedge member according to a second embodiment of the present invention;

fig. 12 is a schematic structural view of the opposing plate portion in the second embodiment of the invention;

fig. 13 is a schematic view of the fitting structure of the gear member and the washer according to the second embodiment of the present invention.

In the figure, A, an angle adjustable hinge; 1. a first connecting arm/first part; 2. a second connecting arm/second part; 3. a gasket; 4. a gear component; 5. a window section; 6. a floating wedge member; 7. an inner tooth surface; 8. a wedge sliding surface; 9. a contact surface; y, an external tooth surface; z, a wedge-shaped space; K. a cover; 10. pushing back the bulge; 11. withdrawing the space; 12. pushing out the protrusion; 13. an elastic member; 14. a fastener; 15. a fixing hole; 16. a first connection hole; 16a, a second connecting hole; 17. an opposite plate section; 18. a first attachment portion; 19. a second attachment portion; 20. a connecting shaft/shaft mating portion; 21. a retaining hole; 22. a sliding outer peripheral surface; 23. a through hole; 24. a boss portion; 25. concave-convex gear teeth; 26. a circular arc surface; 27. a guide ramp; 28. a graded contact portion; 29. a through hole; 30. an internally threaded bore; 31. an abutment projection; 32. a limiting bulge; 33. an annular groove; 34. a chute; 6a, a floating wedge component body; 6b, connecting columns; 6c, groove portion.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "top", "bottom", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

The first embodiment is as follows:

referring to fig. 3 to 7, an angularly adjustable hinge a according to an embodiment of the present invention is schematically shown, including a first connecting arm 1, a second connecting arm 2, a gear part 4, a connecting shaft 20 and a floating wedge part 6, wherein the first connecting arm 1 includes a pair of opposite plate parts 17 and a first attaching part 18 interposed between the pair of opposite plate parts 17, the gear part 4 is disposed between the pair of opposite plate parts 17 and the first attaching part 18, a cover K made of plastic or thin metal plate is attached to each of the side parts of the pair of opposite plate parts 17, the first attaching part 18 has a plate-shaped structure, the second connecting arm 2 has a second attaching part 19 having a plate shape, a plurality of fixing holes 15 are provided in the first attaching part 18 and the second attaching part 19, and the first connecting arm 1 and the second connecting arm 2 are fixed to a piece of furniture by fasteners 14 such as screws or rivets passing through the fixing holes 15; preferably, the opposing plate portions 17 are approximately rectangular, provided with a first connecting hole 16 therethrough, the first attaching portion 18 is provided with a second connecting hole 16a therethrough, the fastener 14 passes through the first connecting hole 16 and the second connecting hole 16a to firmly fix the first attaching portion 18 between the pair of opposing plate portions 17 in parallel, both side surfaces of the gear member 4 are provided with bosses 24 having sliding outer peripheral surfaces 22, and the gear member 4 has a through hole 23 along the axial direction and penetrating the surface of the boss 24 so that the gear member 4 rotates about an axis C1 of the through hole 23, each of the opposing plate portions 17 has a holding hole 21, the sliding outer peripheral surface 22 of the boss 24 is slidably fitted in the corresponding holding hole 21 so as to be slidable under an extremely low contact pressure, and the gear member 4 is held in the housing portion 3 so as to rotate about an axis C1 of the through hole 23. Preferably, the protruding portion 24 is circular or round-like with rounded corners, and may be a rounded polygonal prism, such as a hexagonal prism, a quadrangular prism, a pentagonal prism, etc., so as to ensure smooth sliding action of the protruding portion 24 in the holding hole 21.

The first link arm 1 has a wedge sliding surface 8 to form a wedge-shaped space Z as viewed in the direction of the axis C1 between the wedge sliding surface 8 and the arc-shaped external tooth surface Y of the gear member 4, and in the present embodiment, the wedge sliding surface 8 is formed in an arc shape having a center of an axis C2 (shown with reference to fig. 6) that is eccentric from the axis C1; the inner surface side of the floating wedge component 6 is an arc-shaped inner tooth surface 7 meshed with the outer tooth surface Y of the gear component 4, the outer surface side of the floating wedge component 6 is a contact surface 9 contacted with a wedge sliding surface 8, the floating wedge component 6 can move in a wedge-shaped space Z, the contact surface 9 of the floating wedge component 6 is contacted with the wedge sliding surface 8, the floating wedge component 6 can realize the meshing or separation of the inner tooth surface 7 and the outer tooth surface Y in the moving process, and the swinging of the gear component 4 towards the first connecting arm 1 along one direction is limited by the wedge action of the floating wedge component 6 between the outer tooth surface Y and the wedge sliding surface 8 so as to realize the angle adjustment;

the connecting shaft 20 is inserted into the through hole 23 in the gear part 4 along the direction of the axis C1, the shape of the connecting shaft 20 is matched with that of the through hole 23, one end of the connecting shaft 20 is detachably connected with the second connecting arm 2, when the hinge is installed, the gear part 4, the connecting shaft 20, the floating wedge part 6 and the first connecting arm 1 are assembled into an integral installation in advance, and then the second connecting arm 2 is connected to one end of the connecting shaft 20, so that the installation error of the connecting shaft 20 and the gear part 4 can be avoided, the second connecting arm 2 can be ensured to be smoothly connected to the first connecting arm 1, the installation is convenient, and the installation precision and the yield are improved; and when later maintenance, the second connecting arm 2 can be directly detached from the connecting shaft 20 for maintenance and replacement and assembly.

Specifically, the end of the connecting shaft 20 is provided with an internal threaded hole 30, the second connecting arm 2 is provided with a through hole 29 matched with the connecting shaft 20 in shape, one end of the connecting shaft 20 penetrates through the through hole 29 and is in threaded connection with the fastening piece 14, so that it is ensured that the second connecting arm 2 can drive the connecting shaft 20 and further drive the gear part 4 to rotate, the fastening piece 14 is a screw or a rivet and the like, and further the detachable connection of the second connecting arm 2 and one end of the connecting shaft 20 is realized.

Preferably, the connecting shaft 20 is fixedly connected with the gear part 4 to ensure synchronous rotation of the second connecting arm 2, the connecting shaft 20 and the gear part 4, and preferably, the connecting shaft 20 may be configured to be integrally formed with the gear part 4, thereby facilitating processing. The connecting shaft 20 may also be connected with the through hole 23 in an interference fit manner, and it should be noted that the connecting shaft 20 and the gear member 4 may also be fixedly connected in other manners, which is not limited herein.

The through hole 23 may be a circular through hole or a non-circular through hole, and may be a cylinder, a prism or an irregular-shaped column, such as a hexagonal prism, a quadrangular prism, a pentagonal prism, etc.; when the through hole 23 is a circular through hole, the section of the corresponding connecting shaft 20 is circular, the connecting shaft 20 is fixedly connected with the gear part 4 to ensure that the connecting shaft 20 can drive the gear part 4 to rotate, in addition, when the connecting shaft 20 is matched with the through hole 29 on the second connecting arm 2, a fastening structure can be arranged at the joint of the through hole 29 and the connecting shaft 20 to ensure that the second connecting arm 2 drives the connecting shaft 20 to rotate, and the fastening structure can be a buckle and clamping groove structure which can be clamped and matched, or a clamping protrusion and clamping groove structure and the like; alternatively, the end of the connecting shaft 20 that engages with the through hole 29 of the second connecting arm 2 may be polygonal, and accordingly, the through hole 29 may also be polygonal.

The pair of opposing plate portions 17 are formed with window portions 5, which are preferably wedge-shaped window portions, a part of the wedge sliding surface 8 is formed on the window portions 5, and the remaining part of the wedge sliding surface 8 is formed on the first attaching portion 18. The window portion 5 formed to be recessed when the axis C1 of the through-hole 23 is on the center side is a wedge-shaped hole expanding in the direction of the arrow N, both ends of the floating wedge member 6 are inserted in the window portion 5, and in addition, the window portion 5 has a retreat space 11 at the end on the side of the arrow N direction for storing the floating wedge member 6 so as to release the engagement of the inner tooth face with the gear member 4. The window portion 5 has a stepped contact portion 28 stepped on the circular arc surface 26 on the inner side, and the other surface side of the floating wedge member 6 is a contact surface 9 for contact with the wedge sliding surface 8 of the window portion 5. On the inner tooth face 7, a guide slope 27 that can contact the stepped contact portion 28 is formed.

Further, an elastic member 13 for elastically urging the floating wedge member 6 toward the gear member 4 is provided between the pair of opposing plate portions 17 and the first attachment portion, one end of the elastic member 13 is connected to the first attachment portion 18, and the other end abuts against the outer surface side of the floating wedge member 6 toward the gear member 4 to provide a force to the floating wedge member 6, and in the present embodiment, the elastic member 13 is a plate spring composed of one steel plate, both ends of which are attached to the first attachment portion 18, and the elastic member 13 contacts the middle portion of the contact surface 9 of the floating wedge member 6. The floating wedge member 6 is disposed in a wedge-shaped space Z formed between the gear member 4 and the wedge sliding surface 8, and is elastically urged toward the gear member 4;

the male and female gear teeth 25 of the gear member 4 extend in the direction of the arrow N from the push-back projection 10 projecting from an arc whose centre is the centre of the axis P1 of the through-hole 23 over a range (100 ° to 120 °) slightly exceeding (over 10 ° to 30 °) a quarter circle (90 °) on the same arc. An ejecting projection 12 projecting from an arc centered at the center of the axis P1 is provided on the end of the section where the male and female gear teeth 25 are formed. The radius R0 of the sliding outer peripheral surface 22 is set to 60 to 80% of the gear radius Rg of the spur gear teeth 25 (outer tooth surface Y), where the center of the circle of the radius R0 is the center of the axis P1 and the center of the gear radius Rg is the center of the axis P1.

The angle-adjustable hinge a according to the embodiment of the present invention is embodied such that when the first connecting arm 1 and the second connecting arm 2 are positioned on the same straight line, the second connecting arm 2 is mounted to the connecting shaft 20, and at this time, the floating wedge member 6 is engaged with the concave-convex gear teeth 25 on the side of the push-out projection 12 by the inner tooth surface 7 and is in contact with the wedge slide surface 8 by the contact surface 9 to restrict the rotation of the gear member 4 in the arrow R direction, and when the second connecting arm 2 is further lifted in the arrow N direction, the contact surface 9 of the floating wedge member 6 elastically pushed toward the gear member 4 by the elastic member 13 is slightly separated from the wedge slide surface 8 to form a gap. As the lifting movement continues, the leading inclined surface 27 of the floating wedge member 6 contacts the stepped contact portion 28 of the window portion 5, the floating wedge member 6 is separated from the gear member 4 by the gap, and the inner flank 7 passes over the concave-convex gear teeth 25 of the outer flank Y, rattling, at which time the floating wedge member 6 engages with the concave-convex gear teeth 25 through the inner flank 7 and contacts with the wedge sliding surface 8 through the contact surface 9 to restrict the rotation of the second link arm 2 in the direction of arrow R. Thus, the second connecting arm 2 is maintained at a desired inclination. The slide outer circumferential surface 22 is substantially slid on the holding hole 21 to firmly hold the posture of the second connecting arm 2 because the gear member 4 is held by the boss 24 fitted in the holding hole 21.

When the second link arm 2 is lifted, the floating wedge member 6 contacts the push-back projection 10, the guide slope surface 27 contacts the stepped contact portion 28, and then, when the second link arm 2 is further swung in the direction of the arrow N, the floating wedge member 6 pushed back by the push-back projection 10 against the elastic force of the elastic piece 13 is separated from the gear member 4, passes over the stepped contact portion 28, and is stored in the retraction space 11. That is, the engagement of the internal tooth surface 7 with the male and female gear teeth 25 is released by the separation of the floating wedge member 6 from the gear member 4. In addition, the floating wedge member 6 bears against the gear member 4 to restrict rotation in the direction of arrow N. This state is a swing end state in which an angle formed by the first link arm 1 and the second link arm 2 is a swing end angle. In the swing end state, the second link arm 2 does not swing in the direction of the arrow N toward the first link arm 1 beyond the swing end angle. The engagement of the inner tooth face 7 with the concave-convex gear teeth 25 is released, and the second link arm 2 becomes a free swing state with respect to the first link arm 1 in a range from the swing start angle to the swing end angle. When the second link arm 2 swings in the direction of the arrow N to bring the first link arm 1 and the second link arm 2 into a straight state (having a swing start angle), the guide slope 27 is pressed by the push-out projection 12 of the gear part 4, the floating wedge part 6 is pushed out of the retraction space 11, and the engagement of the internal tooth surface 7 with the concave-convex gear teeth 25 of the gear part 4 is restored to complete an angle adjustment process.

Example two:

as shown in fig. 8 to 13, the present embodiment is different from the first embodiment in that one end of the elastic member 13 is connected to the first attaching portion 18, and the other end abuts against the upper end portion of the floating wedge member 6 toward the gear member 4, preferably, a groove portion 6c for abutting against the elastic member 13 is provided at the upper end portion of the floating wedge member 6, preferably, the elastic member 13 is a spring, the floating wedge member 6 includes a floating wedge member body 6a and a connecting post 6b penetrating and protruding from both sides of the body, the floating wedge member 6 composed of the floating wedge member body 6a and the connecting post 6b floats in a wedge-shaped space Z, both protruding ends of the connecting post 6b are floatingly placed in the window portion 5, the window portion 5 is arc-shaped to bridge a pair of opposite plate portions 17, a gasket 3 is provided inside the opposite plate portions 17, an outer diameter of the gasket 3 is slightly larger than an outer diameter of the gear member 4, the gasket 3 is provided in an annular groove 33 inside the opposite plate, and the gasket 3 can slide along the annular groove 33, the gasket 3 is provided with a grading contact part 28 extending outwards, the grading contact part 28 is positioned between the pair of opposite plate parts 17 and the first attachment part 18 to limit the grading contact part 28 to slide in a small range of the opposite plate parts 17, the grading contact part 28 comprises a sliding chute 34 for the connecting column 6b to slide and an abutting salient point 31 arranged at the end part of the sliding chute 34 for abutting against the connecting column 6b, the gasket 3 is also provided with a limit bulge 32 extending towards the gear part 4, the outer peripheral wall of the connecting column 6b is provided with a sliding outer peripheral surface for contacting the grading contact part 28 to mesh or separate the inner tooth surface 7 with or from the outer tooth Y, when the gasket 3 slides to the abutting salient point 31 abutting against the sliding outer peripheral surface of the connecting column 6b, the inner tooth surface 7 of the floating wedge part 6 is separated from the outer tooth Y of the gear part, the connecting stud 6b slides into the slide slot 34 and the inner toothed surface 7 of the floating wedge member 6 re-engages with the outer teeth Y of the gear member 4.

The specific working process of the angle-adjustable hinge A in the embodiment is as follows: referring to fig. 9, when the first link arm 1 and the second link arm 2 are positioned on the same straight line, the second link arm 2 is mounted to the link shaft 20, at which time the floating wedge member 6 engages with the concave-convex gear teeth 25 on the side of the push-out projection 12 through the inner tooth surface 7 and contacts with the wedge sliding surface 8 through the contact surface 9 to restrict the rotation of the gear member 4 in the arrow R direction, and when the second link arm 2 is further lifted in the arrow N direction, since the coupling post 6b of the floating wedge member 6 is floatingly placed in the window portion 5, the contact surface 9 of the floating wedge member 6 elastically pushed toward the gear member 4 by the elastic member 13 is slightly separated from the wedge sliding surface 8 to form a gap, the floating wedge member 6 is separated from the gear member 4 by the gap, and the inner tooth surface 7 passes over the concave-convex gear teeth 25 to generate a click sound, at which time the floating wedge member 6 engages with the concave-convex gear teeth 25 through the inner tooth surface 7 and contacts with the wedge sliding surface 8 through the contact The rotation in the R direction, therefore, the second connecting arm 2 is maintained at a desired inclination, and the sliding outer circumferential surface 22 is slid substantially on the holding hole 21 to firmly hold the posture of the second connecting arm 2 because the gear member 4 is held by the boss 24 fitted in the holding hole 21.

The second connecting arm 2 is lifted continuously, the pushing-out protrusion 12 of the gear component 4 abuts against the limiting protrusion 32 of the washer 3 to prevent the lifting action, and the second connecting arm is lifted continuously in the direction N, the limiting protrusion 32 is pressed by the pushing-out protrusion 12 to slide slightly along the annular groove 33 of the opposite plate portion 17, so that the abutting protrusion of the stepped contact portion 28 abuts against the connecting column 6b to overcome the elastic force of the elastic member 13 to press the floating wedge component 6 to separate the gear component 4 from the floating wedge component 6, as shown in fig. 10, that is, the meshing between the internal tooth surface 7 and the concave-convex gear teeth 25 of the external teeth Y is released by separating the floating wedge component 6 from the gear component 4. Further, the push-back projection 10 of the gear part 4 abuts on the first attaching part 18 to restrict the rotation in the arrow N direction, which is a swing-terminated state, and at the same time, since the inner tooth face 7 is separated from the outer teeth of the gear part 4, the second link arm 2 becomes a free-swing state with respect to the first link arm 1 in the range from the swing-starting angle to the swing-terminating angle, and when the second link arm 2 swings in the arrow N direction to bring the first link arm 1 and the second link arm 2 into a straight state (having the swing-starting angle), at which time the push-back projection 10 of the gear part 4 abuts on the stopper projection 32 of the washer 3, and continues to be pressed down in the R direction, the stopper projection 32 is reversely pressed by the push-back projection 10 to slide along the annular groove 33 of the opposing plate part 17, so that the link post 6b passes over the abutment projection of the stepped contact part 28 to enter the slide groove 34, and under the elastic force of, the inner tooth surface 7 of the floating wedge component 6 is meshed with the concave-convex gear teeth of the outer tooth Y of the gear component 4 in a recovering mode, and therefore an angle adjusting process is completed.

In summary, the connecting shaft 20 is disposed in the gear component 4 along the axis C1, one end of the connecting shaft 20 is detachably connected to the second connecting arm 2, when the hinge is installed, the gear component 4, the connecting shaft 20, the floating wedge component 6 and the first connecting arm 1 are assembled in advance to be installed as a whole, and then the second connecting arm 2 is connected to one end of the connecting shaft 20, so that the installation error between the connecting shaft 20 and the gear component 4 can be avoided, the second connecting arm 2 can be ensured to be smoothly connected to the first connecting arm 1, the installation is convenient, and the installation accuracy and the yield are improved; and when later maintenance, the second connecting arm 2 can be directly detached from the connecting shaft 20 for maintenance and replacement and assembly.

It should be understood that the terms "first", "second", etc. are used herein to describe various information, but the information should not be limited to these terms, which are only used to distinguish one type of information from another. For example, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information, without departing from the scope of the present invention.

The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. An angle adjustable hinge is characterized by comprising a first connecting arm, a second connecting arm, a gear part, a connecting shaft and a floating wedge part;

2. The angle-adjustable hinge according to claim 1, wherein an end of the connecting shaft is provided with an internal threaded hole, the second connecting arm is provided with a through hole having a shape matching the connecting shaft, and one end of the connecting shaft passes through the through hole and is threadedly connected by a fastener.

3. The adjustable angle hinge of claim 1, wherein said connecting shaft is fixedly connected to said gear member.

4. The adjustable angle hinge of claim 3, wherein said connecting shaft is integrally formed with said gear member.

5. The adjustable angle hinge of claim 3, wherein the connecting shaft is connected with the through hole in an interference fit.

6. The angle adjustable hinge according to any one of claims 1 to 5, wherein the through hole is a circular through hole or a non-circular through hole;

7. An angularly adjustable hinge according to any of claims 1 to 5, wherein said boss is circular or rounded-like with rounded corners.

8. The angle adjustable hinge according to any one of claims 1 to 5, wherein a window portion is formed on a pair of said opposing plate portions, and a part of said wedge sliding surface is formed on said window portion.

9. The angle adjustable hinge according to any one of claims 1 to 5, wherein an elastic member is provided between a pair of said opposing plate portions and said first attaching portion for elastically urging said floating wedge member toward said gear member.

10. The angle adjustable hinge according to claim 9, wherein one end of the elastic member is connected to the first attaching portion, and the other end faces the gear member and abuts on an outer surface side of the floating wedge member.

11. The adjustable angle hinge according to claim 8, wherein the floating wedge member includes a floating wedge member body and a coupling post penetrating and protruding from both sides of the floating wedge member body, both protruding ends of the coupling post being floatingly received in the window portion.

12. The angle adjustable hinge according to claim 11, wherein a washer is provided on an inner side of said opposite plate portion, said washer is provided with a stepped contact portion extending outward, and a sliding outer peripheral surface contacting said stepped contact portion to engage or disengage said inner tooth surface with or from said outer tooth surface is provided on an outer peripheral wall of said connecting post.

13. The adjustable angle hinge of claim 8, wherein the window portion is wedge-shaped or arcuate.