Hinge having damping structure

Abstract

A hinge having a damping structure, the hinge comprising: a pipe unit, which defines an inner cavity and an outer cavity; a shaft unit; and a valve unit, which is arranged on the pipe unit and is configured to control the flow direction of a fluid, wherein the pipe unit is constructed to have a first flow path, a second flow path and a third flow path which are in communication with the inner cavity and the outer cavity; the shaft unit comprises a shaft member which can move in the inner cavity; the shaft member enables the fluid in the inner cavity to be squeezed into the outer cavity, such that the fluid pushes the valve unit to close the first flow path and the third flow path; and when the shaft member is moving, same can also draw the fluid in the outer cavity to enter the inner cavity via the third flow path and enter a shaft cavity of the shaft member via the first flow path. In this way, the fluid is held in the inner cavity and the shaft cavity, which can not only reduce the size of the pipe unit, but can also simplify the overall structure.

Description

Damping structural hinge Technical Field

[0001] [Corrected 07.09.2023 according to Rule 91] The present invention relates to a damping structural hinge, and in particular to a damping structural hinge that provides a cushioning effect through hydraulic pressure. Background Art

[0002] [Corrected 07 / 09 / 2023 according to Rule 91] Taiwan Patent No. 1654363 discloses a conventional hinge device comprising a first leaf that secures two objects together, and two sleeve units interposed between the first leaves and rotating synchronously with the plurality of first leaves. Thus, when an external force acts on either object, the hydraulic module in one of the sleeve units generates a cushioning effect to control the speed of relative displacement of the objects, thereby achieving a cushioning effect.

[0003] [Corrected 07.09.2023 according to Rule 91] However, the oil circuit design of the hydraulic module is relatively complex, and there is still room for improvement in terms of the number and cost of components, processing difficulty, and assembly procedures. More importantly, as shown in Figure 4 of Taiwan Patent No. I654363, one of the kit units is designed with double bevels, so that a shaft segment and an active member push each other during relative rotation, triggering the hydraulic module to achieve a buffering effect, and the multiple bevels are prone to slippage problems.

[0004] [Corrected 07.09.2023 in accordance with Rule 91] Summary of the invention

[0005] [Corrected 07.09.2023 according to Rule 91] Therefore, the purpose of the present invention is to provide a damping structure hinge that can reduce the overall volume, has a simple structure, is easy to install and has reliable motion transmission.

[0006] [Corrected 07.09.2023 according to Rule 91] Therefore, the damping structure hinge of the present invention includes a pipe unit, a shaft unit, and a valve unit.

[0007] [Corrected 07.09.2023 according to Rule 91] The tubular unit extends along an axial direction, including an inner sleeve, an outer sleeve surrounding the inner sleeve and defining an outer cavity with the inner sleeve, and an axial sleeve surrounding the outer sleeve. The tubular unit also constructs a first flow path, a second flow path and a third flow path connected to the outer cavity.

[0008] [Corrected 07.09.2023 according to Rule 91] The shaft unit includes a shaft member capable of moving along the axial direction, the shaft member having a buffer portion that is inserted into the inner sleeve and defines an inner cavity with the inner sleeve, the buffer portion defines an axial cavity connected to the inner cavity, and has an axial channel connected to the axial cavity.

[0009] [Corrected 07.09.2023 according to Rule 91] The valve unit includes a first valve group that is arranged between the axial channel and the axial cavity and can be opened to block the first flow path, and a second valve group that is arranged between the second flow path and the third flow path and can be opened to block the third flow path.

[0010] [Corrected 07.09.2023 according to Rule 91] Thereby, the shaft can move between a first position and a second position relative to the inner sleeve, and in the first position, the volume of the inner cavity is the smallest, and in the second position, the volume of the inner cavity is the largest. When the shaft moves from the first position toward the second position, the fluid will push the second valve group to open the third flow path, and enter the inner cavity from the outer cavity through the third flow path. When the shaft is adjacent to the second position, the fluid will further push the first valve group to open the first flow path, and enter the shaft cavity from the outer cavity through the first flow path and the shaft channel. When the shaft moves from the second position toward the first position, the fluid will enter the outer cavity from the inner cavity through the second flow path, and push the first valve group to close the first flow path, and push the second valve group to close the third flow path.

[0011] [Corrected 07 / 09 / 2023 according to Rule 91] The present invention is effective in that, through the design of the shaft cavity, the fluid can be collected in the inner cavity or the shaft cavity during the movement of the shaft. Thus, the use of the inner cavity and the shaft cavity to accommodate the fluid not only reduces the volume of the pipe unit but also simplifies the overall structure.

[0012] [Corrected 07.09.2023 according to Rule 91] In one embodiment, the inner sleeve has the first flow path, which extends in a direction perpendicular to the axial line and is adjacent to one end of the inner sleeve, and when the shaft is in the second position, the axial channel of the shaft is connected to the first flow path.

[0013] [Corrected 07.09.2023 according to Rule 91] In one embodiment, the buffer portion also has an opening connected to the shaft cavity and the inner cavity, the first valve group has a first valve member, and a first ball member, the first valve member has a plunger inserted into the buffer portion, and an arc plug opposite to the plunger and capable of airtight contact with the buffer portion, the first ball member is suitable for being pushed by fluid to close the opening, or for forcing the first valve member to block the shaft cavity from connecting to the shaft channel.

[0014] [Corrected 07.09.2023 according to Rule 91] In one embodiment, the inner sleeve further has the second flow path, which is adjacent to the other end of the inner sleeve and has a direct flow section extending along the axial direction and connected to the inner cavity, and a cross-flow section extending in a direction perpendicular to the axial direction and connected to the outer cavity and the direct flow section.

[0015] [Corrected 07.09.2023 according to Rule 91] In one embodiment, the inner sleeve also has the third flow path, which extends in a direction perpendicular to the axis and is connected to the direct current section, the second valve group has a second valve member, and a second ball member, the second valve member has a plunger inserted into the inner sleeve, and an arc plug opposite to the plunger of the second valve member and capable of airtight contact with the inner sleeve, the second ball member is suitable for being pushed by the fluid, and is used to press against the second valve member to block the third flow path from connecting to the inner cavity.

[0016] [Corrected 07.09.2023 according to Rule 91] In one embodiment, the valve unit further includes a throttle valve, which is screwed onto the other end of the inner sleeve along the axial direction, and has a throttle portion defining a throttle gap with the inner sleeve, and the widths of the throttle gap and the throttle portion along the direction perpendicular to the axial direction gradually increase from one end adjacent to the inner cavity toward the other end away from the inner cavity, and the screwing depth of the throttle valve and the inner sleeve is inversely proportional to the width of the throttle gap.

[0017] [Corrected 07.09.2023 according to Rule 91] In one embodiment, it further includes a pivot unit, which includes two operable pages, each of the pages has a sleeve, and the multiple sleeves are arranged along the axial direction and define a pipe around the axis. The pipe unit is inserted into the pipe along the axial direction and rotates together with one of the pages. The shaft of the shaft unit rotates together with the other page and is capable of moving along the axial direction during the rotation of any of the pages, and generating a buffering force through the fluid between the inner cavity and the outer cavity.

[0018] [Corrected 07.09.2023 according to Rule 91] In one embodiment, the shaft unit further includes a slot, a dividing plate, at least one annular gasket (preferably four plates), a first action member, and at least one first bolt. The slot, the dividing plate, the annular gasket, and the first action member are fixed by metal riveting. When the first bolt of the shaft member rotates, it is fixed and slides up and down, so that the door leaf slowly closes. It is further explained that the shaft member rotates together with the other leaf plate, and the first action member is installed on the shaft sleeve and rotates together with the shaft sleeve. The first acting member has two spaced-apart high grooves and two low grooves spaced apart from the multiple high grooves along the axial direction. The at least one first bolt is connected to the shaft and can be rolled against the first acting member and can be sunk into the multiple high grooves or the multiple low grooves. When one of the pages drives the tube unit to rotate, or the other page drives the shaft to rotate, the first acting member and the at least one first bolt will push each other and drive the shaft to move along the axial direction.

[0019] [Corrected 07.09.2023 according to Rule 91] In one embodiment, the shaft sleeve has two axial notches that are spaced apart and extend from one end face along the axial direction, and the first active member also has two convex portions that are spaced apart and formed on the circumferential surface, and the multiple convex portions correspond to the multiple axial notches of the shaft sleeve.

[0020] [Corrected 07.09.2023 according to Rule 91] In one embodiment, it also includes a pressure storage unit, which is inserted into the pipe along the axial direction and includes a first sleeve that rotates together with one of the pages, a second sleeve that is rotatably sleeved on the first sleeve and rotates together with the other page, and a ratchet part that is movably and rotatably sleeved on the first sleeve, and the ratchet part is disengageable from the first sleeve. The shaft unit also includes a torsional elastic element inserted into the first sleeve and connected to the ratchet part and the second sleeve. When one of the pages drives the first sleeve to rotate forward, or the other page drives the second sleeve to rotate forward, the torsional elastic element will be twisted by the ratchet part or the second sleeve, thereby generating an elastic force that drives the corresponding page to rotate in the opposite direction.

[0021] [Corrected 07.09.2023 according to Rule 91] In one embodiment, the first sleeve of the pressure accumulation unit has a ring tooth portion forming an inner circumferential surface, the ratchet member has a sleeve portion that is sleeved on the shaft member, an operable driving portion that extends from the sleeve portion along the axial direction, and a plurality of latching teeth formed on the sleeve portion and disengageably engaged with the ring tooth portion.

[0022] [Corrected 07.09.2023 according to Rule 91] In one embodiment, the pressure storage unit also includes a locking bolt, and the ratchet part also has a C-shaped annular groove formed on the outer peripheral surface, the locking bolt is screwed into one of the leaves in a direction perpendicular to the axis and inserted into the first sleeve, and has an extension portion that can be detachably inserted into the annular groove of the ratchet part.

[0023] [Corrected 07.09.2023 according to Rule 91] In one embodiment, it further includes a pressure accumulation unit, which is inserted into the pipe along the axial direction and includes a first sleeve that rotates together with one of the leaves, a second sleeve that is rotatably sleeved on the first sleeve and rotates together with the other leaf, and a pressure accumulation member that is screwed on the first sleeve and can push the second sleeve along the axial direction. The shaft unit also includes a torsional elastic element that is inserted between the second sleeve and the shaft sleeve and connected to the second sleeve and the pipe unit. When one of the leaves drives the first sleeve and the shaft sleeve to rotate, or the other leaf drives the second sleeve to rotate, an inserting portion of the torsional elastic element is inserted into a sleeve portion of the ratchet member and an inserting hole of the second sleeve. The torsional elastic element is twisted by the shaft sleeve or the second sleeve, thereby generating an elastic force that drives the corresponding leaf to rotate in the opposite direction. The screwing depth of the pressure accumulation member and the first sleeve is proportional to the pressure of the second sleeve pressing the torsional elastic element.

[0024] [Corrected 07.09.2023 according to Rule 91] In one embodiment, the shaft unit further includes a second acting member and at least one second bolt member, the second acting member is installed between the first sleeve and the second sleeve and rotates together with the first sleeve, the second acting member has two spaced-apart high grooves, and two low grooves that are spaced from the multiple high grooves along the axial direction and have a position difference with the multiple high grooves and are spaced from the multiple high grooves, the at least one second bolt member is connected to the shaft member and can be rolled against the second acting member, and can be sunk into the multiple high grooves of the second acting member or the multiple low grooves of the second acting member, when the first sleeve is driven to rotate, or the shaft member is driven to rotate, the second acting member and the at least one second bolt member will push each other, thereby generating friction to slow down the rotation speed.

[0025] [Corrected 07.09.2023 according to Rule 91] In one embodiment, the sleeve of the other leaf also has two interlocking parts protruding from the inner surface and facing each other, the second sleeve of the pressure storage unit has a rotating part that is sleeved on the first sleeve, and a limiting part opposite to the rotating part, the rotating part has two second notches extending from an end face opposite to the rotating part along the axial direction and engaged with the multiple interlocking parts, and a rectangular hole formed on the end face, the shaft also has a pressure storage part opposite to the buffer part and with a rectangular cross-section, the pressure storage part is inserted into the pressure storage unit along the axial direction and sleeved on the rectangular hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] [Corrected 07.09.2023 according to Rule 91] FIG1 is a schematic top view illustrating an embodiment of a door leaf and a fixed surface connected to a damping structure hinge of the present invention;

[0027] [Corrected 07.09.2023 according to Rule 91] Figure 2 is an exploded perspective view of the embodiment;

[0028] [Corrected 07.09.2023 according to Rule 91] Figure 3 is an incomplete exploded perspective view of the first embodiment;

[0029] [Corrected 07.09.2023 according to Rule 91] FIG4 is a fragmentary cross-sectional view illustrating a pressure accumulator unit of the embodiment;

[0030] [Corrected 07.09.2023 according to Rule 91] Figure 5 is another incomplete exploded perspective view of the embodiment;

[0031] [Corrected 07.09.2023 according to Rule 91] FIG6 is a fragmentary cross-sectional view illustrating a shaft member of the embodiment in a first position;

[0032] [Corrected 07.09.2023 according to Rule 91] FIG7 is a fragmentary cross-sectional view similar to FIG6 , but with a first valve group blocking a first flow path and a second valve group opening a third flow path;

[0033] [Corrected 07.09.2023 according to Rule 91] FIG8 is a fragmentary cross-sectional view taken at an angle different from FIG7 , illustrating the embodiment of the shaft member being in the second position and the first valve group opening the first flow path;

[0034] [Corrected 07.09.2023 according to Rule 91] FIG9 is a fragmentary cross-sectional view similar to FIG7 , but with the first valve group blocking the first flow path and the second valve group blocking the third flow path;

[0035] [Corrected 07.09.2023 according to Rule 91] Figure 10 is a cross-sectional view of the embodiment;

[0036] [Corrected 07.09.2023 according to Rule 91] FIG11 is a cross-sectional view at an angle different from that of FIG10 , illustrating a torsional elastic element of the embodiment being twisted;

[0037] [Corrected 07.09.2023 according to Article 91] Figure 12 is a fragmentary exploded perspective view similar to Figure 3, but the pressure accumulator unit is different;

[0038] [Corrected 07.09.2023 according to Rule 91] FIG13 is a fragmentary cross-sectional view illustrating a variation of the pressure accumulator unit and a shaft unit in the embodiment; and

[0039] Legend: 11: Door leaf 12: Fixed surface 2: Pivot unit 20: Pipe 21: First leaf 211: First sleeve 212: Reinforcement portion 22: Second leaf 221: Second sleeve 222: Fitting portion 23: Spacer ring 231: Spacer ring protrusion 24: Ring buckle 3: Pressure storage unit 31: First sleeve 311: First notch 312: Perforation 313: Ring tooth portion 32: Second sleeve 321: Rotating portion 322: Limiting portion 323: Second notch 324: Rectangular hole 325: Socket 33: Ratchet 331: Socket 332: Drive 333: Gear 334: Annular groove 34: Locking pin 35: Locking bolt 351: Extension 36: Pressure accumulator 4: Pipe unit 40: Outer cavity 41: Inner sleeve 411: First flow path 412: Second flow path 4121: Direct flow section 4122: Cross flow section 413: Third flow path 414: Screw hole 415: Through hole 416: Leak-proof gasket 42: Outer sleeve 421: Leak-proof pad Ring 43: Shaft kit 431: Axial notch 432: Metal rivet 44: Locking pin 45: Locking bolt 451: Extension 46: Indexing plate 461: Slot 5: Shaft unit 50: Inner cavity 51: Shaft 510: Shaft cavity 511: Buffer portion 512: Pressure storage portion 513: Opening 514: Shaft channel 52: Oil seal 520: Annular gap 53: First action member 531: Protrusion 532: High groove 533: Low groove 54: First bolt 55: Annular gasket Plate 551: protrusion 56: torsional elastic element 561: plug-in portion 57: auxiliary elastic element 58: second action member 582: upper groove 583: lower groove 59: second bolt 6: valve unit 61: first valve group 611: first valve member 612: first ball member 613: plug 62: second valve group 621: second valve member 622: second ball member 623: plug 63: throttle valve 630: throttle gap 631: throttle portion 632: leak-proof gasket X: axis DETAILED DESCRIPTION

[0040] [Corrected 07 / 09 / 2023 in accordance with Rule 91] Referring to Figures 1 and 2, one embodiment of the damping structure hinge of the present invention is suitable for connecting a door leaf 11 to a fixed surface 12. The fixed surface 12 can be a door frame, a wall, or the ground. The door leaf 11 and the fixed surface 12 form an angle. The angle ranges from 0 to 200 degrees. When 0 degrees is set, the door is closed, and when it is greater than 0 degrees, the door is open.

[0041] [Corrected 07.09.2023 according to Rule 91] The damping structure hinge includes a pivot unit 2, a pressure storage unit 3, a pipe unit 4, an axis unit 5, and a valve unit 6 (as shown in FIG6 ).

[0042] 2 , 3 and 4 , the pivot unit 2 includes a first leaf 21 and a second leaf 22 , two spacer rings 23 , and two buckles 24 , which are pivotally connected to each other and can be operated to rotate by an external force.

[0043] [Corrected 07.09.2023 according to Rule 91] The first leaf 21 has two first sleeves 211 surrounding an axis X and spaced apart along the axis XX direction, and a reinforcing portion 212 connecting the multiple first sleeves 211.

[0044] [Corrected 07.09.2023 according to Rule 91] The second leaf 22 has a second sleeve 221 that surrounds the axis X and is inserted between the plurality of first sleeves 211. The second sleeve 221 and the plurality of first sleeves 211 define a channel 20 extending along the axis X (as shown in FIG10 ) and has two equiangularly distributed interlocking portions 222 protruding from the inner surface.

[0045] [Corrected 07.09.2023 according to Rule 91] The multiple spacer rings 23 further include a spacer ring protrusion 231, and the spacer ring protrusion 231 is arranged in the multiple first sleeves 211 or in the second sleeve 221.

[0046] The ring buckles 24 are embedded in the inner surfaces of the first sleeves 211 .

[0047] [Corrected 07.09.2023 according to Rule 91] The pressure accumulator unit 3 and the pipe unit 4 are inserted into the pipe 20 along the axis X. The pressure accumulator unit 3 includes a first sleeve 31 that rotates together with one of the first sleeves 211 of the first leaf 21, a second sleeve 32 that is rotatably sleeved on the first sleeve 31 and rotates together with the second sleeve 221 of the second leaf 22, a ratchet 33 that can move along the axis X and is rotatably sleeved on the first sleeve 31, two locking pins 34, and a locking bolt 35.

[0048] The first sleeve 31 has two first notches 311 spaced apart and extending from one end surface along the axis X, a through hole 312 extending from the outer surface perpendicular to the axis X, and an annular tooth portion 313 forming the inner circumference.

[0049] The second sleeve 32 has a rotating portion 321 rotatably sleeved on the first sleeve 31, and a stopper portion 322 opposite the rotating portion 321. The stopper portion 322 has two spaced-apart second notches 323 extending along the axis X from an end surface opposite the rotating portion 321, and a rectangular hole 324 formed on the end surface. The plurality of second notches 323 engage with the engagement portion 222 of the second sleeve 221, allowing the second sleeve 32 of the pressure accumulator unit 3 to rotate together with the second leaf 22.

[0050] [Corrected 07.09.2023 according to Rule 91] The ratchet member 33 has a socket portion 331, an operable driving portion 332 extending from the socket portion 331 along the axis X direction, a plurality of latching teeth 333 formed on the socket portion 331 and disengageably engaged with the annular tooth portion 313, and a C-shaped annular groove 334 formed between the socket portion 331 and the driving portion 332.

[0051] [Corrected 07.09.2023 according to Rule 91] The multiple locking pins 34 pass through one of the first sleeves 211 along a direction perpendicular to the axis X and are inserted into the first sleeve 31, so that the first page 21 rotates together with the first sleeve 31.

[0052] [Corrected 07.09.2023 according to Rule 91] The locking bolt 35 is screwed into one of the first sleeves 211 in a direction perpendicular to the axis X and extends through the through-hole 312 of the first sleeve 31. The locking bolt 35 has an extension portion 351 extending in a direction perpendicular to the axis X. The extension portion 351 is detachably inserted into the annular groove 334 of the ratchet member 33.

[0053] [Corrected 07.09.2023 according to Rule 91] Referring to Figures 2, 5 and 6, the pipe unit 4 is inserted into the pipe 20 and includes an inner sleeve 41, an outer sleeve 42 surrounding the inner sleeve 41 and defining an outer cavity 40 with the inner sleeve 41, an axis sleeve 43 surrounding the outer sleeve 42, two locking pins 44, and a locking bolt 45.

[0054] [Corrected 07 / 09 / 2023 according to Rule 91] The inner sleeve 41 has a first flow path 411 extending perpendicularly along the axis X and adjacent to one end of the inner sleeve 41, a second flow path 412 adjacent to the other end of the inner sleeve 41, a third flow path 413 extending perpendicularly along the axis X, a threaded hole 414 extending from an end surface adjacent to the other end along the axis X, and a through hole 415 extending perpendicularly to the axis X and intersecting the threaded hole 414. The first flow path 411 connects the outer cavity 40 with the interior of the inner sleeve 41. The second flow path 412 has a direct flow section 4121 extending along the axis X and connecting to the interior of the inner sleeve 41, and a cross-flow section 4122 extending perpendicularly to the axis X and connecting the outer cavity 40 with the direct flow section 4121. The third flow path 413 connects to the second flow path 412.

[0055] [Corrected 07.09.2023 according to Rule 91] The shaft sleeve 43, the outer sleeve 42, and the inner sleeve 41 are pressed against the corresponding ring buckle 24, and have two axial notches 431 spaced apart and extending from one end face along the axis X direction.

[0056] [Corrected 07.09.2023 according to Rule 91] The multiple locking pins 44 pass through another first sleeve 211 along a direction perpendicular to the axis X and are inserted into the shaft kit 43, so that the first leaf 21 rotates together with the shaft kit 43.

[0057] [Corrected 07.09.2023 according to Rule 91] The locking bolt 45 is screwed into the other first sleeve 211 in a direction perpendicular to the axis X and passes through the shaft sleeve 43 and the outer sleeve 42 to the through hole 415 passing through the inner sleeve 41. The locking bolt 45 has an extension portion 451 extending in a direction perpendicular to the axis X.

[0058] [Corrected 07.09.2023 according to Rule 91] The shaft unit 5 includes a shaft member 51, two oil seals 52, a first action member 53, two first bolt members 54, several annular gaskets 55, a torsional elastic element 56, and two auxiliary elastic elements 57, and there is a leak-proof gasket 421 between the first action member 53 and the outer sleeve 42.

[0059] [Corrected 07 / 09 / 2023 according to Rule 91] The shaft member 51 is movable along the axis X and includes a buffer portion 511 that passes through the inner sleeve 41 and defines an inner cavity 50 with the inner sleeve 41, and a pressure accumulator portion 512 that extends opposite the buffer portion 511 and passes through the pressure accumulator unit 3. The buffer portion 511 defines an axial cavity 510 and includes an opening 513 extending from one end surface along the axis X and connecting the axial cavity 510 with the inner cavity 50, and an axial passage 514 extending perpendicular to the axis X and connecting the axial cavity 510 with the interior of the inner sleeve 41. The pressure accumulator portion 512 has a rectangular cross-section and fits within the rectangular hole 324 of the second sleeve 32, allowing the shaft member 51 and the second sleeve 32 to rotate together.

[0060] [Corrected 07.09.2023 according to Rule 91] The multiple oil seals 52 are mounted on the pressure storage portion 512 of the shaft member 51 and are in airtight contact with the inner surface of the inner sleeve 41. The multiple oil seals 52 surround the shaft passage 514 and define an annular gap 520 with the inner surface of the inner sleeve 41.

[0061] [Corrected 07.09.2023 according to Rule 91] The first actuator 53 is mounted on the shaft sleeve 43 and includes two spaced-apart protrusions 531 formed on its circumferential surface, two spaced-apart high grooves 532 formed on one end surface facing the pressure accumulator unit 3, and two spaced-apart low grooves 533 formed on the end surface and spaced apart from the high grooves 532. The protrusions 531 mate with the axial notches 431 of the shaft sleeve 43 and rotate together with the shaft sleeve 43. The low grooves 533 are offset from the high grooves 532 along the axis X direction.

[0062] [Corrected 07.09.2023 according to Rule 91] The plurality of first bolts 54 are connected to the shaft member 51 and are located between the buffer portion 511 and the pressure accumulation portion 512. The plurality of first bolts 54 are rollably abutted against the first operating member 53 and can be sunk into the plurality of high grooves 532 or the plurality of low grooves 533.

[0063] [Corrected 07.09.2023 according to Rule 91] The plurality of annular washers 55 are mounted on the shaft sleeve 43. Each annular washers 55 has two protrusions 551 formed on its circumference at intervals. The protrusions 551 engage with the axial notches 431 of the shaft sleeve 43, allowing the annular washers 55 to rotate together with the shaft sleeve 43.

[0064] [Corrected 07.09.2023 according to Rule 91] The torsional elastic element 56 is disposed between the ratchet member 33 and the limiting portion 322 of the second sleeve 32 and has two opposite plug-in portions 561 extending along the axis X. The multiple plug-in portions 561 are plugged into the ratchet member 33 and the second sleeve 32.

[0065] [Corrected 07.09.2023 according to Rule 91] The auxiliary elastic element 57 is pressed between the shaft 51 and the ratchet 33, constantly generating an elastic force that moves the shaft 51 away from the ratchet 33. This elastic force reduces the resistance felt by the shafts 51 when rolling on the first actuating member 53, thereby improving the smoothness of the door opening from 0 degrees to approximately 90 degrees.

[0066] [Corrected 07.09.2023 according to Rule 91] The valve unit 6 includes a first valve group 61 that is movably arranged between the axial channel 514 and the axial cavity 510 along the axis X direction and can be opened to block the first flow path 411, a second valve group 62 that is movably arranged between the second flow path 412 and the third flow path 413 along a direction perpendicular to the axis X and can be opened to block the third flow path 413, and a throttle valve 63 that is screwed into the screw hole 414 of the inner kit 41.

[0067] [Corrected 07.09.2023 according to Rule 91] The first valve assembly 61 includes a first valve member 611 and a first ball member 612. The first valve member 611 includes a plunger inserted into the buffer portion 511, and an arc plug opposite the plunger and capable of airtight contact with the buffer portion 511. The first ball member 612 is adapted to be pushed by fluid to close the opening 513, or to press against the first valve member 611 to block the connection between the shaft cavity 510 and the shaft passage 514.

[0068] [Corrected 07.09.2023 according to Rule 91] The second valve assembly 62 includes a second valve member 621 and a second ball member 622. The second valve member 621 includes a plunger inserted into the inner sleeve 41 and a curved plug opposite the plunger of the second valve member 621 and capable of airtight contact with the inner sleeve 41. The second ball member 622 is adapted to be pushed by fluid and pressed against the second valve member 621 to block the third flow path 413 from connecting to the inner cavity 50.

[0069] [Corrected 07.09.2023 according to Rule 91] The throttle valve 63 has a throttle portion 631 that defines a throttle gap 630 with the inner sleeve 41. Specifically, when the throttle valve 63 and the inner sleeve 41 move vertically, a throttle portion 631 is located between the throttle valve 63 and the inner sleeve 41. The widths of the throttle gap 630 and the throttle portion 631 along a direction perpendicular to the axis X gradually increase from one end adjacent to the inner cavity 50 toward the other end away from the inner cavity 50. The threading depth of the throttle valve 63 and the inner sleeve 41 is inversely proportional to the width of the throttle gap 630. When the threading depth of the throttle valve 63 and the inner sleeve 41 is deeper, the width of the throttle gap 630 along the direction perpendicular to the axis X is smaller. When the threading depth of the throttle valve 63 and the inner sleeve 41 is shallower, the width of the throttle gap 630 along the direction perpendicular to the axis X is larger.

[0070] [Corrected 07 / 09 / 2023 according to Rule 91] Referring to Figures 6, 7, 8, and 9, the shaft member 51 is movable relative to the inner sleeve 41 between a first position (as shown in Figure 6) and a second position (as shown in Figure 8). In the first position, the volume of the inner cavity 50 is minimized, and in the second position, the volume of the inner cavity 50 is maximized.

[0071] [Corrected 07 / 09 / 2023 according to Rule 91] When the shaft member 51 moves vertically from the first position to the second position, a tight leak-proof gasket 421 is located between the first actuator 53 and the outer sleeve 42, and an oil seal 52 is located within the outer sleeve 42. As shown by the arrows in Figure 7 , the fluid pushes the second valve assembly 62 to open the third flow path 413, and then enters the inner chamber 50 from the outer chamber 40 through the third flow path 413. When the shaft member 51 approaches the second position, the axial passage 514 communicates with the outer chamber 40 through the annular gap 520. At this point, the fluid filling the buffer portion 511 and the outer chamber 40 further pushes the first valve assembly 61 to open the first flow path 411, and then enters the axial chamber 510 from the outer chamber 40 through the first flow path 411 and the axial passage 514, as shown by the arrows in Figure 8 .

[0072] [Corrected 07 / 09 / 2023 according to Rule 91] When the shaft 51 moves from the second position toward the first position, or vertically from the second position toward the first position, a tight leak-proof gasket 421 is present, and fluid flows from the inner chamber 50 through the second flow path 412 into the outer chamber 40. This pushes the first valve assembly 61 to close the first flow path 411, and pushes the second valve assembly 62 to close the third flow path 413. At this point, fluid can only flow from the inner chamber 50 through the second flow path 412 into the outer chamber 40, as indicated by the arrows in Figure 9 .

[0073] [Corrected 07.09.2023 according to Rule 91] Referring to Figures 2, 10, and 11, during assembly, the pre-assembled pipe unit 4, shaft unit 5, and valve unit 6 are simply inserted into the pipe 20 along the axis X until they abut against the corresponding ring buckles 24. Then, the pre-assembled pressure accumulator unit 3 is inserted into the pipe 20 until the first sleeve 31 of the pressure accumulator unit 3 engages with the corresponding ring buckle 24 and abuts against the corresponding first sleeve 211, thereby preliminarily positioning the pressure accumulator unit 3 within the pipe 20.

[0074] [Corrected 07.09.2023 according to Rule 91] Next, the plurality of locking bolts 45, 35 are screwed into the plurality of first sleeves 211 until the locking bolts 35 are inserted into the through-holes 312 of the first sleeve 31. The locking bolts 45 are then inserted through the shaft sleeve 43 and the outer sleeve 42 into the through-holes 415 of the inner sleeve 41. The pressure accumulator unit 3, the pipe unit 4, and the pivot unit 2 are then connected via the plurality of locking bolts 45, 35. Finally, the plurality of locking pins 44, 34 are driven between the plurality of first sleeves 211, the first sleeve 31, and the pipe unit 4. The plurality of locking pins 44, 34 are then driven into position between the plurality of first sleeves 211, the first sleeve 31, and the pipe unit 4. The plurality of locking pins 44, 34 further restrict the pressure accumulator unit 3, the pipe unit 4, and the pivot unit 2.

[0075] [Corrected 07 / 09 / 2023 in accordance with Rule 91] Referring to Figures 7, 8, 10, and 11, when an external force drives the door leaf 11 to cause the second leaf 22 to rotate in a positive direction about the axis X relative to the fixed surface 12, rotating leftward or rightward from a closed position of 0 degrees to an open position of 85 to 95 degrees, the second leaf 22 drives the shaft member 51 to rotate together via the second sleeve 32 of the pressure accumulator unit 3. Because the rotating portion 321 of the second sleeve 32 is in an idle state with the first sleeve 31, when the first leaf 21 is not rotating, the shaft member 51 will twist the torsional elastic element 56 during rotation to generate a restoring force.

[0076] [Corrected 07.09.2023 according to Rule 91] Meanwhile, the indexing plate 46, the annular gasket 55, and the first operating member 53 are fixed to the shaft sleeve 43 and the axial notch 431 by metal rivets 432. Simultaneously, the shaft member 51 drives the multiple shaft members 51 to roll from the multiple lower grooves 533 of the first operating member 53 to the multiple higher grooves 532. Furthermore, during the rolling process of the multiple shaft members 51, the position difference between the multiple lower grooves 533 and the multiple higher grooves 532 drives the shaft members 51 to move along the axis X direction from the first position to the second position. As a result, during the movement of the buffer portion 511, the pressure change in the inner chamber 50 generates a siphon effect (suction), drawing fluid from the outer chamber 40 toward the third flow path 413. This also pushes the second valve assembly 62 to open the third flow path 413, allowing the fluid to quickly enter the inner chamber 50 from the third flow path 413 through the second flow path 412. Because the fluid can flow more quickly, the buffer force generated is smaller, and the resistance when opening the door is minimized.

[0077] [Corrected 07 / 09 / 2023 according to Rule 91] When the shaft member 51 moves from the position adjacent to the second position to the second position, the fluid filling the buffer portion 511 and the outer chamber 40 further pushes the first valve assembly 61 to open the first flow path 411, as shown by the arrow in FIG8 . The fluid then enters the shaft chamber 510 from the outer chamber 40 through the first flow path 411 and the shaft passage 514. Thus, by accommodating the fluid entering the outer chamber 40 through the shaft chamber 510, the volume of the outer chamber 40 can be reduced, thereby further reducing the volume of the outer sleeve 42.

[0078] [Corrected 07.09.2023 according to Rule 91] Referring to Figures 8, 9, 10, and 11, when the external force driving the door leaf 11 is released, the second sleeve 32 is acted upon by the restoring force of the torsional elastic element 56, causing the shaft member 51 to rotate in the opposite direction. During the rotation of the shaft member 51, the shaft member 51 causes the plurality of shaft members 51 to roll from the plurality of high grooves 532 of the first actuating member 53 to the plurality of low grooves 533. Due to the positional difference between the plurality of low grooves 533 and the plurality of high grooves 532, the shaft members 51 move along the axis X from the second position toward the first position.

[0079] [Corrected 07 / 09 / 2023 according to Rule 91] During the reverse rotation of the second flap 22 from the open position to the closed position, either rightward or leftward, the buffer portion 511 of the shaft member 51 pushes against the fluid within the inner chamber 50, causing the fluid to push against the first valve member 611 of the first valve assembly 61 to open the axial chamber 510 and block the axial passage 514 and the first flow path 411. Simultaneously, fluid entering the second flow path 412 from the inner chamber 50 also pushes against the second valve assembly 62 to block the third flow path 413. Consequently, the fluid, which is restricted to flowing toward the second flow path 412, can only flow from the inner chamber 50 through the direct flow section 4121 of the second flow path 412 into the throttle gap 630, then from the throttle gap 630 into the cross-flow section 4122, and finally from the cross-flow section 4122 into the outer chamber 40. At this time, due to the small space of the throttle gap 630, the fluid can only pass through the throttle gap 630 slowly, generating a larger buffering force. Combined with the rolling friction effect of the multiple first bolts 54 and the first operating member 53, the second leaf 22 can be rotated at a slow speed, achieving the effect of slow door closing and reducing the closing speed.

[0080] [Corrected 07 / 09 / 2023 according to Rule 91] It should be noted that the present invention is not limited to achieving the cushioning and door opening and closing effects by rotating the second leaf 22. In other variations of this embodiment, when an external force drives the first leaf 21 to rotate about the axis X, the plurality of first sleeves 211 can drive the shaft sleeve 43 and the first sleeve 31 to rotate. Furthermore, when the first sleeve 31 rotates idly relative to the second sleeve 32 and the second leaf 22, the second sleeve 32, and the shaft 51 remain stationary, the shaft sleeve 43 drives the first operating member 53 to rotate relative to the shaft 51, and the first sleeve 31 drives the ratchet member 33 to rotate. In this manner, the first operating member 53 can also push the shaft 51 along the axis X, generating a cushioning force. The ratchet member 33 can also twist the torsional elastic element 56 to generate a restoring force, which, combined with the vertical compressive pressure and lateral thrust torque, further enhances the restoring force. The present invention has no directional restrictions when being installed.

[0081] [Corrected 07.09.2023 according to Rule 91] Referring to Figures 6 and 8, it is worth noting that the throttle valve 63 can be inserted with a hand tool (not shown). By rotating the throttle valve 63 with the hand tool, the threading depth of the throttle valve 63 in the screw hole 414 of the inner sleeve 41 can be adjusted, thereby adjusting the size of the throttle gap 630. For example, the larger the throttle gap 630, the faster the flow rate of the fluid in the second flow path 412, and the faster the closing speed of the first leaf 21 or the second leaf 22. When the gap is maximum, the hydraulic damping effect is completely eliminated, and only the mechanical sliding resistance of the multiple shaft members 51 and the first actuating member 53 is used to buffer the closing speed. At this point, the ratchet member 33 can be rotated to reduce the accumulated torque value, and the aforementioned mechanical sliding resistance can be used to slow the closing speed, achieving a balanced effect. Conversely, when the throttle gap 630 is smaller, the flow rate of the fluid in the second flow path 412 is slower, the damping effect of the oil pressure buffer is greater, and the closing speed of the first leaf 21 or the second leaf 22 is slower, thereby achieving the effect of adjustable closing speed.

[0082] [Corrected 07.09.2023 according to Rule 91] Referring to Figure 4, to adjust the stored torque value, the ratchet member 33 can be first pressed down using the hand tool to disengage the multiple latching teeth 333 of the ratchet member 33 from the annular tooth portion 313 of the first sleeve 31. Rotating the ratchet member 33 can then twist the torsional elastic element 56 and change the elastic force of the torsional elastic element 56. After the hand tool releases the ratchet member 33, the ratchet member 33 is again pushed by the torsional elastic element 56, and the multiple latching teeth 333 engage with the annular tooth portion 313. For example, the ratchet member 33 can rotate 360 ​​degrees, and each 36-degree rotation can increase the restoring force by approximately 18.5 kg.

[0083] [Corrected 07 / 09 / 2023 according to Rule 91] It is worth noting that although the ratchet member 33 can rotate 360 ​​degrees, it is limited to approximately 324 degrees by the extension 351 of the locking bolt 35. The locking bolt 35 must be unscrewed until the extension 351 is disengaged from the annular groove 334 before the ratchet member 33 can continue to rotate.

[0084] [Corrected 07 / 09 / 2023 according to Rule 91] It should be noted that the torsional elastic element 56 is not limited to being twisted. In other variations of this embodiment, the torsional elastic element 56 can also be compressed by changes in the pressure accumulator unit 3. Referring to Figures 2, 12, and 13, the pressure accumulator unit 3 similarly includes the first sleeve 31, the second sleeve 32, the multiple locking pins 34, and the locking bolt 35. The difference is that the pressure accumulator unit 3 omits the ratchet element 33 shown in Figure 3 and also includes a pressure accumulator 36.

[0085] [Corrected 07.09.2023 according to Rule 91] The pressure accumulator 36 is screwed to the first sleeve 31 and is capable of pushing the second sleeve 32 along the axis X direction.

[0086] [Corrected 07.09.2023 according to Rule 91] In addition, the pipe unit 4 further includes a plurality of indexing plates 46 engaged with the shaft sleeve 43. Each indexing plate 46 has a plurality of slots 461 surrounding the axis X and in a wave shape.

[0087] [Corrected 07.09.2023 according to Rule 91] The torsional elastic element 56 of the shaft unit 5 is inserted between the second sleeve 32 and the shaft sleeve 43 and inserted into the slot 461 between the second sleeve 32 and the corresponding indexing plate 46. The shaft unit 5 also includes a second operating member 58 and a second bolt 59. The second operating member 58 is installed between the first sleeve 31 and the second sleeve 32 and rotates together with the first sleeve 31. The second operating member 58 has two spaced-apart high grooves 582 and two low grooves 583 that are spaced apart from the high grooves 582 along the axis X direction and are spaced apart from the high grooves 582. The multiple second bolts 59 are connected to the shaft member 51 and can roll against the second operating member 58, and can be sunk into the multiple high grooves 582 or the multiple low grooves 583 of the second operating member 58.

[0088] [Corrected 07 / 09 / 2023 in accordance with Rule 91] When the first sleeve 31 rotates, or the shaft 51 rotates, the second actuator 58 and the plurality of second bolts 59 push against each other, generating friction that slows the rotation. Similarly, simply rotating the pressure accumulator 36 with the hand tool pushes the second sleeve 32 against the torsional elastic element 56, thereby changing the elastic force of the torsional elastic element 56. The threaded depth of the pressure accumulator 36 and the first sleeve 31 is proportional to the pressure applied by the second sleeve 32 against the torsional elastic element 56.

[0089] [Corrected 07.09.2023 according to Rule 91] Through the above description, the advantages of the aforementioned embodiment can be summarized as follows:

[0090] [Corrected 07 / 09 / 2023 according to Rule 91] 1. The present invention utilizes a unique oil circuit configuration, combined with the design of the shaft cavity 510 of the shaft member 51, to funnel fluid into the inner cavity 50 or the shaft cavity 510 during the movement of the shaft member 51. Furthermore, a leak-proof gasket 632 is located between the throttle valve 63 and the inner sleeve 41 to prevent vertical movement. Thus, by accommodating fluid within the inner cavity 50 and the shaft cavity 510, the volume of the tubing unit 4 is reduced and the overall structure is simplified.

[0091] [Corrected 07.09.2023 according to Rule 91] 2. The present invention has no directional restrictions on installation and door opening, and in the case of being able to reduce the volume of the pipe unit 4 as mentioned above, the overall length can be further reduced, and it is suitable as a hinge connecting different types of door frames, or between the fixed surface 12 and the door leaf 11.

[0092] [Corrected 07.09.2023 according to Rule 91] 3. The present invention can control the closing speed of the door leaf 11 and change the resistance when closing the door by simply adjusting the ratchet member 33 or adjusting the throttle valve 63. This can not only meet the needs of different users but also is very easy to use.

[0093] [Corrected 07.09.2023 according to Rule 91] 4. The pipe unit 4, the shaft unit 5 and the valve unit 6 can be assembled into a single unit for providing a buffering force. Therefore, it is applicable to any other object that needs to provide a buffering force, and has a wide range of applications.

[0094] [Corrected 07.09.2023 according to Rule 91] However, the above description is merely an embodiment of the present invention and should not be used to limit the scope of implementation of the present invention. Any simple equivalent changes and modifications made in accordance with the claims and the contents of the patent specification of the present invention are still within the scope of the patent of the present invention.

Claims

1. [Corrected 07.09.2023 in accordance with Rule 91] A damping structural hinge, characterized in that: Include: A pipe unit extends along an axial direction, comprising an inner sleeve, an outer sleeve surrounding the inner sleeve and defining an outer cavity with the inner sleeve, and an axial sleeve surrounding the outer sleeve, wherein the pipe unit further constructs a first flow path, a second flow path, and a third flow path connected to the outer cavity; an axis unit, comprising an axis member capable of moving along the axis direction, the axis member having a buffer portion penetrating the inner sleeve and defining an inner cavity with the inner sleeve, the buffer portion defining an axis cavity connected to the inner cavity, and having an axis channel connected to the axis cavity; and a valve unit, comprising a first valve group interposed between the shaft passage and the shaft cavity and capable of opening and blocking the first flow path, and a second valve group interposed between the second flow path and the third flow path and capable of opening and blocking the third flow path; Thereby, the shaft member can move between a first position and a second position relative to the inner sleeve. In the first position, the volume of the inner cavity is the smallest, and in the second position, the volume of the inner cavity is the largest. When the shaft member moves from the first position toward the second position, the fluid will push the second valve group to open the third flow path, and enter the inner cavity from the outer cavity through the third flow path. When the shaft member is adjacent to the second position, the fluid will further push the first valve group to open the first flow path, and enter the shaft cavity from the outer cavity through the first flow path and the shaft channel. When the shaft member moves from the second position toward the first position, the fluid will enter the outer cavity from the inner cavity through the second flow path, and push the first valve group to close the first flow path, and push the second valve group to close the third flow path.

2. [Corrected 07.09.2023 according to Rule 91] The damping structural hinge according to claim 1, characterized in that: The inner sleeve has the first flow path, which extends in a direction perpendicular to the axis and is adjacent to one end of the inner sleeve. When the shaft is located at the second position, the shaft channel of the shaft is connected to the first flow path.

3. [Corrected 07.09.2023 according to Rule 91] The damping structural hinge according to claim 2, characterized in that: The buffer portion also has an opening connected to the shaft cavity and the inner cavity. The first valve group has a first valve component and a first ball component. The first valve component has a plunger inserted into the buffer portion, and an arc plug opposite to the plunger and capable of airtight contact with the buffer portion. The first ball component is suitable for being pushed by fluid to close the opening, or to press against the first valve component to block the shaft cavity from connecting to the shaft channel.

4. [Corrected 07.09.2023 according to Rule 91] The damping structural hinge according to claim 2, characterized in that: The inner sleeve also has the second flow path, which is adjacent to the other end of the inner sleeve and has a direct flow section extending along the axial direction and connected to the inner cavity, and a cross-flow section extending in a direction perpendicular to the axial direction and connected to the outer cavity and the direct flow section.

5. [Corrected 07.09.2023 according to Rule 91] The damping structural hinge according to claim 4, characterized in that: The inner sleeve also has the third flow path, which extends in a direction perpendicular to the axis and is connected to the direct flow section. The second valve group has a second valve member and a second ball member. The second valve member has a plunger inserted into the inner sleeve and an arc plug opposite to the plunger of the second valve member and capable of airtight contact with the inner sleeve. The second ball member is suitable for being pushed by fluid and is used to press against the second valve member to block the third flow path from connecting to the inner cavity.

6. [Corrected 07.09.2023 according to Rule 91] The damping structural hinge according to claim 5, characterized in that: The valve unit also includes a throttle valve, which is screwed into the other end of the inner sleeve along the axial direction and has a throttle portion that defines a throttle gap with the inner sleeve. The widths of the throttle gap and the throttle portion along a direction perpendicular to the axial direction gradually increase from one end adjacent to the inner cavity toward the other end away from the inner cavity, and the screwing depth of the throttle valve and the inner sleeve is inversely proportional to the width of the throttle gap.

7. [Corrected 07.09.2023 according to Rule 91] The damping structural hinge according to claim 1, characterized in that: It also includes a pivot unit, which includes two operable leaves, each of which has a sleeve, and the multiple sleeves are arranged along the axial direction and define a pipeline around the axis. The pipe unit is inserted into the pipeline along the axial direction and rotates together with one of the leaves. The shaft unit's shaft rotates together with the other leaf and can move along the axial direction during the rotation of any leaf, and generates a buffer force through the fluid between the inner cavity and the outer cavity.

8. [Corrected 07.09.2023 according to Rule 91] The damping structural hinge according to claim 7, characterized in that: The shaft unit also includes a slot, a dividing plate, at least one annular gasket, a first action member, and at least one first bolt. The slot, the dividing plate, the annular gasket, and the first action member are fixed by metal riveting. When the first bolt of the shaft member rotates, they are fixed and slide up and down. The shaft member rotates together with the other page. The first action member is installed on the shaft sleeve and rotates together with the shaft sleeve. The first action member has two spaced-apart high grooves and two low grooves that form a position difference with the multiple high grooves along the axial direction and are spaced from the multiple high grooves. The at least one first bolt is connected to the shaft member and can be rolled against the first action member and can be sunk into the multiple high grooves or the multiple low grooves. When one of the pages drives the pipe unit to rotate, or the other page drives the shaft member to rotate, the first action member and the at least one first bolt will push each other and drive the shaft member to move along the axial direction.

9. [Corrected 07.09.2023 according to Rule 91] The damping structural hinge according to claim 8, characterized in that: The shaft sleeve has two axial notches that are spaced apart and extend from one end face along the axial direction. The first acting member also has two convex portions that are spaced apart and formed on the circumferential surface. The multiple convex portions correspond to the multiple axial notches of the shaft sleeve.

10. [Corrected 07.09.2023 according to Rule 91] The damping structural hinge according to claim 8, characterized in that: The cam is configured to move the spring member to a position adjacent to the first sleeve and to move the spring member to a position adjacent to the first sleeve when the cam member is in a position adjacent to the first sleeve. The cam member is configured to move the spring member to a position adjacent to the first sleeve and to move the spring member to a position adjacent to the first sleeve when the cam member is in a position adjacent to the first sleeve.

11. [Corrected 07.09.2023 according to Rule 91] The damping structural hinge according to claim 10, characterized in that: The first sleeve of the pressure storage unit has a ring tooth portion forming an inner circumferential surface, and the ratchet member has the sleeve portion sleeved on the shaft member, an operable driving portion extending from the sleeve portion along the axial direction, and a plurality of latching teeth formed on the sleeve portion and disengageably engaged with the ring tooth portion.

12. [Corrected 07.09.2023 according to Rule 91] The damping structural hinge according to claim 10, characterized in that: The pressure storage unit also includes a locking bolt, and the ratchet part also has a C-shaped annular groove formed on the outer peripheral surface. The locking bolt is screwed into one of the leaves in a direction perpendicular to the axis and inserted into the first sleeve, and has an extension portion that can be detachably inserted into the annular groove of the ratchet part.

13. [Corrected 07.09.2023 according to Rule 91] The damping structural hinge according to claim 8, characterized in that: The cam is an axially coupled device for translating a plurality of pistons into and out of the piston rods, wherein the pistons are coupled to a plurality of pistons and a plurality of pistons are coupled to the piston rods. The plurality of pistons are coupled to a plurality of pistons and a plurality of pistons are coupled to the piston rods. The plurality of pistons are coupled to a plurality of pistons and a plurality of pistons are coupled to the piston rods. The plurality of pistons are coupled to a plurality of pistons and a plurality of pistons are coupled to the piston rods.

14. [Corrected 07.09.2023 according to Rule 91] The damping structural hinge according to claim 13, characterized in that: The shaft unit also includes a second acting member and at least one second bolt member. The second acting member is installed between the first sleeve and the second sleeve and rotates together with the first sleeve. The second acting member has two spaced-apart high grooves and two low grooves that are spaced from the multiple high grooves along the axial direction and have a position difference with the multiple high grooves. The at least one second bolt member is connected to the shaft member and can be rolled against the second acting member and can be sunk into the multiple high grooves of the second acting member or the multiple low grooves of the second acting member. When the first sleeve is driven to rotate, or the shaft member is driven to rotate, the second acting member and the at least one second bolt member will push each other to generate friction to slow down the rotation speed.

15. [Corrected 07.09.2023 according to Rule 91] A damping structural hinge according to claim 10 or 13, characterized in that: The sleeve of the other leaf piece also has two engaging parts protruding from the inner surface and facing each other. The second sleeve of the pressure storage unit has a rotating part that is sleeved on the first sleeve, and a limiting part opposite to the rotating part. The rotating part has two second notches extending from an end face opposite to the rotating part along the axial direction and engaged with the multiple engaging parts, and a rectangular hole formed on the end face. The shaft member also has a pressure storage part opposite to the buffer part and with a rectangular cross-section. The pressure storage part is inserted into the pressure storage unit along the axial direction and sleeved on the rectangular hole.

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