TWM456184U - Pneumatic buffering device - Google Patents

Description

Air pressure buffer

The present invention relates to a pneumatic cushioning device, and more particularly to a pneumatic cushioning device for a prosthetic knee joint.

The advent of the prosthetic knee joint facilitates the amputation of a person with a physical limb defect, trauma or lesion, so that these people can use the prosthetic knee joint to walk. The common prosthetic knee joint is mainly composed of a knee seat, a plurality of connecting rods, a cushioning device and a joint seat, and can achieve both knee flexion and knee extension movement. Among them, the cushioning device provides a cushioning effect in the knee flexion and knee extension of the prosthetic knee joint, and thus plays an important role in the prosthetic knee joint.

Referring to FIG. 1, a conventional hydraulic buffer device 7 includes a piston chamber 71 filled with hydraulic oil and a buffer chamber 73 located below the piston chamber 71 and communicating with the piston chamber 71. In addition, a piston 72 is disposed in the piston chamber 71 for up-and-down displacement as the knee joint is stretched or bent, and an inert gas-filled air bag 74 is disposed in the buffer chamber 73, and the prosthetic knee is actuated every time. When the piston 72 is driven to push the hydraulic oil in the piston chamber 71 to move into the buffer chamber 73, after the hydraulic oil enters the buffer chamber 73, the air bag 74 is squeezed. The gas in the air bag 74 naturally causes a reaction force to the hydraulic oil, so that the hydraulic oil flows with a certain resistance, and the hydraulic oil also generates resistance to the displacement of the piston 72, thus When moving, the piston 72 can be properly cushioned when displaced.

However, during the use of the hydraulic buffer device 7, the internal hydraulic oil is slowly leaked over time, so the hydraulic pressure buffer device 7 must be appropriately supplemented with hydraulic oil for a certain period of time. However, the oil leakage itself causes considerable trouble. In addition, if the hydraulic buffering device 7 is filled with hydraulic oil, it is not easy to repair, so another buffer that does not require the use of hydraulic oil is designed. The device is an important direction of effort.

Therefore, it is an object of the present invention to provide a pneumatic cushioning device that does not require hydraulic oil and is convenient for maintenance.

Therefore, the air pressure buffer device of the present invention comprises a housing, a piston unit, a knee flexing adjustment unit and a knee extension damping unit.

The housing defines a knee damper mounting slot, a knee damper mounting slot that is not directly connected to the knee damper mounting slot, and a lower knee damper mounting slot and the knee damper mounting slot and respectively The buffer space connected to each other.

The piston unit includes an outer cylinder disposed on the housing, an inner cylinder disposed in the outer cylinder, and a piston member that is driven to be vertically displaced within the inner cylinder, the outer cylinder A space is defined between the body and the inner cylinder to communicate with the knee damper mounting groove, and the piston member separates an upper air chamber and a knee extending from the inner space A lower air chamber in which the damper mounting groove is connected.

The knee flexing adjustment unit is mounted on the knee flexing mounting groove and is used for adjusting fluid flow through the knee flexing mounting groove when the piston member is displaced .

The knee extension damping adjustment unit is mounted to the knee extension damping mounting groove and is used to adjust the fluid flow rate of the mounting groove through the knee extension when the piston member is displaced.

Preferably, the housing further includes a base wall above the knee flexing mounting slot and the knee extension damping slot, a surrounding wall extending upward from the base wall and engaging the outer barrel with the outer wall, the inner The inner diameter of the barrel is uniform and has a barrel body portion located above the top surface of the surrounding wall, a lower neck portion extending downward from the bottom surface of the barrel body portion and abutting against the inner wall surface of the surrounding wall, and a barrel body An upper neck portion extending upwardly, and an inner tube through hole penetrating the upper neck portion and communicating the space with the upper air chamber, wherein the outer diameter of the lower neck portion and the upper neck portion are both Less than the barrel body portion.

Preferably, the housing further includes a plurality of outer passages extending from the top surface of the surrounding wall to the surrounding wall and the base wall to communicate the spacing space with the knee flexing mounting groove, and the lower air chamber is penetrated through the base wall An inner through hole communicating with the knee damper mounting groove, a partition wall located below the knee damper mounting groove and the knee damper mounting groove, and a bent knee extending through the partition wall to connect the knee damper mounting groove to the buffer space a damper through hole, and a knee damper through hole penetrating the partition wall to connect the knee damper mounting groove to the buffer space.

Preferably, the knee flexing mounting groove has a first opening communicating with the outside from the outside to the inside, a first outer mounting portion communicating with the spacing space through the outer passages, and a through-buckle damping passage a first inner mounting portion that communicates with the buffer space; the knee flexing adjustment unit includes a first shunt ring disposed mainly on the first inner mounting portion, and a portion is disposed on the first The outer mounting portion is adjacent to the first fixing sleeve at the first opening, a first throttle tube mainly located between the first diverting ring and the first fixing sleeve, and is displaceably located at the first throttle tube a first fine adjustment member, and a first fine adjustment screw displaceably disposed in the first fixing sleeve and combined with the first fine adjustment member; the first fine adjustment screw is closed together with the first fixing sleeve The first opening, the first diverter ring is disposed for the first throttle tube to communicate with the first outer mounting portion and the first inner mounting portion, and the first fine adjustment screw portion is located The movement of the first fine adjustment member is driven in the first throttle tube by its displacement, thereby controlling the flow of fluid into the first throttle tube.

Preferably, the first diverter ring has a first central diversion hole and a plurality of first side diversion holes surrounding the first intermediate diversion hole; the first throttle tube has a portion fixed to the first fixed sleeve a first surrounding portion in the barrel, a first tubular body portion extending rearward from the first surrounding portion and passing through the first intermediate diverting hole of the first diverting ring, and a first defining portion defined by the first surrounding portion a first flow space, a first throttle defined by the first tubular body portion and communicating with the first throttle space, and a plurality of first through the first surrounding portion and the first throttle space a first outflow portion communicating with the first throttle holes, the first inner mounting portion being in communication with the first throttle channel; the knee flexing adjustment unit further comprising a set of the first a splitter ring and a plurality of first gaskets adjacent to the opening of the first outer mounting portion, a first gasket disposed on the first shunt ring and abutting the first gasket, and a first gasket spaced apart from the opening of the first outer mounting portion, and a first spring disposed on the first tubular body portion and having two ends respectively abutting the first surrounding portion and the first gasket A first spring abutting in turn forcing the first pad Causing the first gasket to close the first side splitting holes to form a one-way valve structure, such that the first gasket can be pushed away from the first inner mounting portion through the first side splitting holes when the fluid is driven by force Flowing to the first outer mounting portion, but not from the first outer mounting portion to the first inner mounting portion, the first fine adjustment screw having a first end located in the first throttle space, the first a fine adjustment member having a first joint portion coupled to the first end portion in the first throttle space, and a first portion extending rearward from the first joint portion and partially located in the first throttle passage The fine adjustment column has a gap between the first fine adjustment column and the first tube body portion, and the first fine adjustment column is displaceable in the first throttle channel to adjust the flow rate of the fluid in the first throttle channel.

Preferably, the first fine adjustment column is tapered away from the first joint.

Preferably, the knee damper mounting groove has a second opening communicating with the outside from the outside to the inside, a second outer mounting portion communicating with the lower plenum through the inner through hole, and a through the extension a second inner mounting portion of the knee damper through hole communicating with the buffer space; the knee damper adjusting unit includes a second shunt ring disposed mainly at the second inner mounting portion, and a portion is disposed adjacent to the second outer mounting portion a second fixing sleeve at the second opening, a second throttle tube mainly located between the second shunt ring and the second fixing sleeve, and a second fine adjustment displaceably located in the second throttle tube a second fine adjustment screw that is displaceably disposed in the second fixing sleeve and combined with the second fine adjustment member; the second fine adjustment screw and the second fixing sleeve together close the second opening The second diverter ring is disposed for the second throttle tube to communicate with the second outer mounting portion and the second inner mounting portion, the second trimming The screw portion is located in the second throttle tube and is displaced by the displacement of the second fine adjustment member to control the flow of fluid into the second throttle tube.

Preferably, the second diverter ring has a second splitter hole and a plurality of second splitter holes surrounding the second splitter hole; the second throttle has a portion fixed to the second sleeve a second surrounding portion in the cylinder, a second tubular body portion extending rearward from the second surrounding portion and extending through the second intermediate splitting hole of the second shunt ring, and a second defined by the second surrounding portion a second throttle space, a second throttle passage defined by the second tubular body portion and communicating with the second throttle space, and a plurality of second communication passages communicating with the second throttle portion and the second throttle portion a second orifice; the second outer mounting portion is in communication with the second throttle, the second inner mounting portion is in communication with the second throttle; the knee damping adjustment unit further includes a set a second shunt ring and a second gasket spaced apart from the opening of the second outer mounting portion, a second gasket disposed on the second shunt ring and abutting the second gasket, And a second spring disposed on the second body portion and having two ends respectively abutting the second surrounding portion and the second spacer, The second spring abuts against the second gasket to force the second gasket to close the second side split holes to form a one-way valve structure, so that the fluid can be driven to push through the second side split holes a second washer flows from the second inner mounting portion to the second outer mounting portion, but cannot flow from the second outer mounting portion to the second inner mounting portion; the second fine adjustment screw has a second section a second end portion in the flow space, the second fine adjustment member has a second joint portion in the second throttle space combined with the second end portion, and a portion extending rearward from the second joint portion Located in the second a second fine adjustment column in the throttle channel, the second fine adjustment column and the second tube body portion maintain a gap, and the second fine adjustment column is displaceable in the second throttle channel to adjust fluid in the second section The flow in the flow channel.

Preferably, the second fine adjustment column is tapered away from the second joint.

Preferably, the housing further defines an air passage between the knee flexing mounting groove and the knee damper mounting groove, the air passage is in communication with the buffer space for supplementing the gas in the air pressure buffer.

Preferably, the gas pressure device is internally filled with a gas pressure of 170 to 230 PSI.

The utility model has the advantages that the overall design of the air pressure buffer device can achieve a good buffering effect, and can also adjust the personalized optimal comfort for different users, and also, compared with the oil pressure, when maintenance is required. The cushioning device is much easier, and it is also easy to inhale to supplement the internal pressure of the new air pressure cushioning device.

The foregoing and other technical aspects, features and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments. And the directional terms mentioned in the new model, such as "upper", "lower", "before", "after", "left", "right", etc., are only directions referring to the additional schema. Therefore, the directional terminology used is intended to be illustrative, and not to limit the invention.

Referring to FIG. 2, FIG. 3 and FIG. 4, a preferred embodiment of the present air pressure buffering device is filled with an inert gas having a pressure of 200 PSI, and may also be selected. The selection pressure is in the range of 170 to 230 PSI and includes a housing 1, a piston unit 2, a knee flexing adjustment unit 3, and a knee extension damping unit 4.

Referring to Figures 5 and 6, the housing 1 defines a knee flexing mounting groove 14, a knee damper mounting groove 15 not directly communicating with the knee damper mounting groove 14, a knee damper mounting groove 14 and the extension The cushioning space 16 below the knee damper mounting groove 15 and communicating therewith (to cooperate with FIG. 11 and FIG. 12), in other words, the buffer space 16 is connected to the knee flexing mounting groove 14 and the knee damper mounting groove 15, respectively. The knee damper mounting groove 14 is indirectly communicated with the knee damper mounting groove 15. The housing 1 further defines an air passage 17 (with FIG. 9) between the knee damper mounting groove 14 and the knee damper mounting groove 15, and a bottom opening 18 at the bottom connected to the buffer space 16 and the outside. . Specifically, the air blowing passage 17 is located above the buffer space 16, and the air blowing passage 17 communicates with the buffer space 16 to supplement the gas in the air pressure buffer device, that is, the air pressure inside the preferred embodiment. When the battery is insufficient, the present embodiment can be used to inject gas into the preferred embodiment. More specifically, in this embodiment, an airing screw 171 (see FIG. 9) is disposed outside the air blowing passage 17 and a The rubber sealing block 172 which seals the air passage 17 and the outside in the air blowing screw 171 prevents the gas in the embodiment from flowing out from the air blowing passage 17, and when it is necessary to supplement the gas in the embodiment, it is only necessary to use the tool The air blowing screw 171 is disconnected from the closing block 172, that is, the air blowing passage 17 can be inflated.

In addition, referring to FIG. 5 and FIG. 7, the housing 1 further includes a base wall 11 and a base plate 11 above the knee flexing mounting slot 14 and the knee extension damping slot 15. a surrounding wall 13 extending upward from the base wall 11 , a plurality of outer passages 131 extending through the surrounding wall 13 and the base wall 11 and the knee damper mounting groove 14 , a through-the base wall 11 and the knee damper mounting groove 15 communicating inner through hole 111, a partition wall 12 located under the knee damper mounting groove 14 and the knee damper mounting groove 15, and a penetrating through the partition wall 12 to connect the knee damper mounting groove 14 with the buffer space 16 a knee damper through hole 121, a knee damper through hole 122 penetrating the partition wall 12 to connect the knee damper mounting groove 15 with the buffer space 16, and a bottom cover 19 for closing the bottom opening 18 (see FIG. 3). Specifically, in the present embodiment, the number of the outer passages 131 is three, and the knee damper mounting groove 14 and the knee damper mounting groove 15 are located side by side between the base wall 11 and the partition wall 12 . .

Referring to FIG. 6 and FIG. 7 , the knee flexing mounting groove 14 has a first opening 141 communicating with the outside from the outside to the inside, a first outer mounting portion 142 communicating with the outer channels 131 , and a passing The knee-damping through hole 121 is connected to the first inner mounting portion 143 of the buffer space 16. The knee damper mounting groove 15 has a second opening 151 communicating with the outside from the outside to the inside, a second outer mounting portion 152 communicating with the inner through hole 111, and a through-the-hole damper through hole 122 A second inner mounting portion 153 that communicates with the buffer space 16.

Referring to FIG. 2, FIG. 3 and FIG. 11, the piston unit 2 includes an outer cylinder 24 disposed on the housing 1 and joined to the outer cylinder 24, and an inner cylinder disposed in the outer cylinder 24. a piston rod 21 located in the inner cylinder 25, a piston member 26 connected to the piston rod 21 and being driven to be vertically displaced in the inner cylinder 25, and a piston rod 21 for the piston rod 21 to be Sealing the outer barrel 24 A top opening leakage preventing washer 23, and a top cover 22 fixed to the top of the outer cylinder 24 and the leakage preventing washer 23. An outer space between the outer cylinder 24 and the inner cylinder 25 defines a space 29 communicating with the knee damper mounting groove 14. The piston member 26 is spaced apart from the inner cylinder 25 to communicate with the space 29. The upper air chamber 27 and a lower air chamber 28 communicating with the knee extension damping groove 15. Specifically, the space 29 is communicated with the first outer mounting portion 142 through the outer passages 131, and the lower air chamber 28 is connected to the second outer mounting portion 152 through the inner through hole 111 (eg, Figure 12)).

Referring to FIG. 8 and FIG. 11, for further explanation, the inner cylinder 25 has a uniform inner diameter and has a barrel body portion 251 located above the top surface of the surrounding wall 13, and a downwardly extending bottom surface of the barrel body portion 251. a lower necking portion 252 that abuts against an inner wall surface of the surrounding wall 13, an upper necking portion 253 extending upward from the barrel body portion 251, and a plurality of through the upper necking portion 253 and the spacing space 29 and the upper portion The inner cylinder through hole 254 through which the gas chamber 27 communicates, the outer diameter of the lower neck portion 252 and the upper neck portion 253 are smaller than the barrel body portion 251. It is to be noted that a part of the bottom surface of the barrel body portion 251 may be located above the openings of the outer passages 131, and in the present embodiment, the number of the inner tube through holes 254 is four.

Referring to FIGS. 3, 9, and 10, the knee flexing adjustment unit 3 is mounted to the knee flexing mounting groove 14 and is used to adjust the fluid flow rate through the knee flexing mounting groove 14 when the piston member 26 is displaced. Specifically, the knee flexing adjustment unit 3 includes a first shunt ring 31 disposed mainly on the first inner mounting portion 143, and a first fixing portion disposed at the first outer mounting portion 142 adjacent to the first opening 141. a sleeve 33, a first throttle tube 32 mainly located between the first diverter ring 31 and the first fixed sleeve 33, and a set of the first throttle tube 32 a first washer 35 of a shunt ring 31, a first spacer 36 disposed on the first shunt ring 31 and abutting the first washer 35, a first spring 37, and a displaceable position in the first section A first fine adjustment member 38 in the flow tube 32, and a first fine adjustment screw 34 displaceably disposed in the first fixed sleeve 33 and combined with the first fine adjustment member 38. The first trimming screw 34 and the first fixing sleeve 33 together close the first opening 141. The first shunt ring 31 is disposed through the first throttle tube 32 such that the first throttle tube 32 and the first throttle tube 32 respectively An outer mounting portion 142 is in communication with the first inner mounting portion 143. The first fine adjustment screw 34 is partially located in the first throttle tube 32 and is displaced to drive the movement of the first fine adjustment member 38 to control the fluid. The flow into the first throttle 32 is entered.

Further, the first split ring 31 has a first splitter hole 311 and a plurality of first splitter holes 312 surrounding the first splitter 311. The first throttle tube 32 has a first surrounding portion 321 fixed to the first fixing sleeve 33 , a first extending from the first surrounding portion 321 and extending through the first dividing ring 31 . a first tubular body portion 322 of the middle split hole 311, a first throttle space 323 defined by the first surrounding portion 321 , and a first tubular body portion 322 defined by the first tubular body portion 322 and connected to the first throttle space 323 The first throttle channel 324 and a plurality of first throttle holes 325 extending through the first surrounding portion 321 and the first throttle space 323. The first outer mounting portion 142 is in communication with the first throttle holes 325 , and the first inner mounting portion 143 is in communication with the first throttle channel 324 . The first washer 35 is sleeved on the first shunt ring 31 and can close the opening of the first side shunt hole 312 adjacent to the first outer mounting portion 142. The first shim 36 is sleeved on the first The shunt ring 31 abuts against the first washer 35, and the first spring 37 is sleeved on the The first tubular body portion 322 and the two ends respectively abut against the first surrounding portion 321 and the first gasket 36, and the first spring 37 abuts against the first gasket 36 to force the first gasket 35 to close the Waiting for the first side splitting holes 312 to form a one-way valve structure, so that when the fluid is driven by the force, the first gasket 35 can be pushed away by the first side branching holes 312 to flow from the first inner mounting portion 143 to the The first outer mounting portion 142 does not flow from the first outer mounting portion 142 to the first inner mounting portion 143. Further, after the first washer 35 is not pushed by the fluid, the first spring 35 is restored by the elastic force of the first spring 37. The first side split holes 312 are closed in situ. The first fine adjustment screw 34 has a first end portion 341 located in the first throttle space 323, and an exposed and rotatable inner hexagon first screw head 342. The first screw head 342 can utilize a hexagonal wrench. Turn. The first fine adjustment member 38 has a first joint portion 381 which is combined with the first end portion 341 in the first throttle space 323, and a rearward extension portion from the first joint portion 381 and partially located at the first joint portion 381. a first fine adjustment column 382 in the throttle channel 324, the first fine adjustment column 382 is tapered away from the first coupling portion 381, and a gap is maintained between the first tube portion 322 to allow fluid to flow from the gap. The first fine adjustment column 382 is displaceable within the first throttle passage 324 to adjust the flow rate of the fluid in the first throttle passage 324.

The knee extension damping adjustment unit 4 is mounted to the knee extension damping mounting groove 15 and is used to adjust the fluid flow rate through the knee extension damping mounting groove 15 when the piston member 26 is displaced. Specifically, the knee extension damping adjustment unit 4 includes a second shunt ring 41 disposed mainly on the second outer mounting portion 152, and a second portion disposed adjacent to the second outer opening portion 152. Fixing sleeve a second throttle tube 42 disposed between the second shunt ring 41 and the second fixed sleeve 43 and a second washer 45 disposed on the second shunt ring 41. a second spacer 46 of the second shunt ring 41, a second spring 47, a second fine adjustment member 48 displaceably located in the second throttle tube 42, and a second fixed sleeve displaceably disposed A second fine adjustment screw 44 in the barrel 43 and combined with the second fine adjustment member 48. The second fine adjustment screw 44 and the second fixing sleeve 43 together close the second opening 151, and the second diverter ring 41 is disposed for the second throttle tube 42 to make the second throttle tube 42 and the second The second outer mounting portion 152 is in communication with the second inner mounting portion 153. The second fine adjustment screw 44 is partially located in the second throttle tube 42 and is displaced to drive the movement of the second fine adjustment member 48 to control the fluid. The flow into the second throttle tube 42 is entered.

Further, the second split ring 41 has a second splitter hole 411 and a plurality of second splitter holes 412 surrounding the second splitter 411. The second throttle tube 42 has a second surrounding portion 421 fixed in the second fixing sleeve 43 , and a second extending portion extending from the second surrounding portion 421 and passing through the second shunt ring 41 . a second tubular body portion 422 of the second splitter hole 411, a second throttle space 423 defined by the second surrounding portion 421, and a second tubular body portion 422 defined by the second tubular body portion 422 and associated with the second throttled space 423 The connected second throttle channel 424 and a plurality of second throttle holes 425 extending through the second surrounding portion 421 and the second throttle space 423. The second outer mounting portion 152 is in communication with the second throttle holes 425 , and the second inner mounting portion 153 is in communication with the second throttle passage 424 . The second washer 45 is sleeved on the second shunt ring 41 and can separately close the second side shunt holes 412 An opening of the second outer mounting portion 152 is disposed on the second shunt ring 41 and abuts against the second washer 45. The second spring 47 is sleeved on the second tubular body portion 422. And the two ends abut against the second surrounding portion 421 and the second spacer 46, respectively, and the second spring 47 abuts against the second spacer 46 to force the second washer 45 to close the second side shunt holes The 412 is formed to form a one-way valve structure, and the second gasket 45 can be pushed away from the second inner mounting portion 153 to the second outer mounting portion 152 when the fluid is driven by the force. However, the second outer mounting portion 152 cannot flow from the second outer mounting portion 152 to the second inner mounting portion 153. Further, after the second washer 45 is not pushed by the fluid, the second spring 45 is returned to the home position by the elastic force of the second spring 47. The second side split hole 412 is equal. The second fine adjustment screw 44 has a second end portion 441 located in the second throttle space 423, and an exposed and rotatable inner hexagon second screw head 442. The second screw head 442 can be driven by a hexagonal plate. The hand turns. The second fine adjustment member 48 has a second joint portion 481 which is combined with the second end portion 441 in the second throttle space 423, and a second extending portion 481 extending from the second joint portion 481 and partially located at the second portion a second fine adjustment column 482 in the throttle 424, the second fine adjustment column 482 is tapered away from the second joint portion 481, and a gap is maintained between the second tube portion 422 to allow fluid to flow from the gap. Passing (see FIG. 14), and the second fine adjustment column 482 is displaceable in the second throttle 424 to adjust the flow rate of the fluid in the second throttle 424

Referring to Figures 11 and 12, the piston member 26 is displaced up and down within the inner barrel 25 and the flow of fluid in the present embodiment during actuation of the preferred embodiment. As shown in FIG. 11, when the piston member 26 is contracted upward, the upper air chamber The gas in the chamber 27 is pressed by the piston member 26, so that the gas in the upper chamber 27 flows out of the inner cylinder through hole 254 into the space 29, and then flows downward through the outer passage 131 to enter the The first outer mounting portion 142 then flows into the first throttle space 323 through the first throttle holes 325, and then flows backward through the first throttle channel 324 to the first inner mounting portion 143, and finally The buffer space 16 is reached through the knee flexing through hole 121, and for convenience of explanation, this fluid path is referred to as a first fluid path 5, and the first fluid path 5 is indicated by a double arrow line segment in FIG. In addition, as shown in FIG. 12, the gas in the buffer space 16 also has a tendency to flow upward due to the upward contraction of the piston member 26. First, the gas in the buffer space 16 passes upward. The knee dampering through hole 122 flows into the second inner mounting portion 153, then enters the second throttle space 423 through the second throttle passage 424, and flows into the second throttle hole 425 through the second throttle hole 425. The second outer mounting portion 152 finally reaches the lower air chamber 28 through the inner through hole 111, and for convenience of explanation, the fluid path is referred to as a second fluid path 6, and the second fluid path 6 is in FIG. Double arrow line segments are indicated. When the piston member 26 is extended downward, the direction in which the fluid moves away from the first fluid path 5 is opposite to when the piston member 26 is contracted upward, and the direction in which the fluid moves away from the second fluid path 6 is also related to the piston member. 26 is reversed when contracted upwards. It is to be noted that the fluid does not only travel the first fluid path 5 and the second fluid path 6, for example, in FIG. 11, when fluid flows from the first inner mounting portion 143 to the first outer mounting portion 142 In addition to the first throttle channel 324, the first gasket 35 is pushed away through the first side branch holes 312 to flow into the first outer mounting portion from the first inner mounting portion 143. 142. In FIG. 12, when the fluid flows from the second inner mounting portion 153 to the second outer mounting portion 152, in addition to the second throttle passage 424, the second side splitting holes 412 are pushed. The second washer 45 is opened and flows into the second outer mounting portion 152 from the second inner mounting portion 153. In addition, since the first fluid path 5 passes through the first throttle space 323 and the first throttle channel 324, it is adjusted by the first fine adjustment member 38, and the second fluid path 6 passes through the The second throttle space 423 and the second throttle channel 424 are thus adjusted by the second fine adjustment member 48, so the first fine adjustment member 38 and the second fine adjustment member 48 can affect the first fluid path 5, respectively. The flow rate and the flow rate of the second fluid path 6.

Next, how the preferred embodiment of the novel air pressure cushioning device produces a cushioning effect. As shown in Fig. 11, when the user bends the knee, the piston member 26 contracts upwardly, pushing the gas in the upper air chamber 27, forcing it. The gas in the upper air chamber 27 flows downwardly from the first fluid path 5, and the pressed gas also generates a resistance to the displacement of the piston member 26, thereby causing the knee joint to achieve a cushioning effect, and the resistance is The first screw head 342 of the first fine adjustment screw 34 can be adjusted by using a tool, so that the first end portion 341 and the first fine adjustment member 38 advance or retreat in the first throttle space 323, so that the first More or less portions of a fine adjustment column 382 are within the first throttle channel 324 to affect the flow rate of fluid in the first throttle space 323 and the first throttle channel 324, when the flow rate is large The gas in the upper air chamber 27 is relatively easy to flow, so the resistance generated when the piston member 26 is contracted upward is small, and the knee is relatively easy to bend. On the contrary, when the flow rate is small, the resistance generated is larger, Not easy to bend the knee, and because the piston member 26 is up When shrink, Since the first outer mounting portion 142 flows into the first inner mounting portion 143 and can only pass the first throttle channel 324 on the first fluid path 5, the displacement of the first fine adjustment member 38 is highly sensitive to the influence of fluid resistance. . As shown in FIG. 12, when the user stretches the knee, the piston member 26 will extend downward to push the gas in the lower air chamber 28, forcing the gas in the lower air chamber 28 to move toward the second fluid path 6. The downward flow, while the compressed gas will generate a resistance to the piston member 26, thereby causing the knee joint to achieve a cushioning effect, and the magnitude of the resistance can be adjusted by the tool to the second screw head 442 of the second fine adjustment screw 44. The second end portion 441 is advanced or retracted in the second throttle space 423 to affect the flow rate of the gas in the second throttle space 423. When the flow rate is large, the lower air chamber 28 is in the lower air chamber 28 The gas flows more easily, so the resistance generated when the piston member 26 is extended downward is smaller, and the knee is easier to extend. Conversely, when the flow rate is larger, the resistance generated is larger, and the knee is less likely to be stretched, and When the piston member 26 is extended downward, the second inner mounting portion 153 flows from the second outer mounting portion 152 to the second throttle passage 424 on the second fluid path 6, so that the second fine adjustment member 48 The effect of displacement on fluid resistance is very sensitive. Therefore, the preferred embodiment of the present air pressure cushioning device can exert a damping buffer effect on the knee extension or the knee flexion when the user uses the prosthetic knee joint (not shown), and can adjust the first fine adjustment by adjusting the first fine adjustment. The screw 34 and the second fine adjustment screw 44 adjust the damping size of the preferred embodiment.

In summary, the overall design of the air pressure cushioning device can achieve a good cushioning effect, and can also be adjusted for personalized optimal comfort for different users, and in addition, it can be compared with the oil pressure buffer once maintenance is required. Device capacity It is easy to use, and it can easily supplement the internal pressure of the new air pressure buffer device by air pumping, so it can achieve the purpose of the present invention.

However, the above description is only a preferred embodiment of the present invention, and the scope of the present invention cannot be limited thereto, that is, the simple equivalent change and modification made by the novel patent application scope and the novel description content, All remain within the scope of this new patent.

[this invention]

1‧‧‧Shell

11‧‧‧ base wall

111‧‧‧through hole

12‧‧‧ partition wall

121‧‧‧Knee flexing through hole

122‧‧‧Knee damper through hole

13‧‧‧ Around the wall

131‧‧‧Outer channel

14‧‧‧Knee flexing installation slot

141‧‧‧ first opening

142‧‧‧First External Installation Department

143‧‧‧First internal installation

15‧‧‧Knee extension damping installation slot

151‧‧‧ second opening

152‧‧‧Second External Installation Department

153‧‧‧Second internal installation

16‧‧‧ buffer space

17‧‧‧Aeration channel

171‧‧‧Aspirating screw

172‧‧‧closed block

18‧‧‧ bottom opening

19‧‧‧ bottom cover

2‧‧‧piston unit

21‧‧‧ piston rod

22‧‧‧Top cover

23‧‧‧ leakproof gasket

24‧‧‧Outer barrel

25‧‧‧Inner barrel

251‧‧‧The body of the barrel

252‧‧‧ Lower neck

253‧‧‧Upper neck

254‧‧‧Inner tube through hole

26‧‧‧ piston parts

27‧‧‧Upper air chamber

28‧‧‧Air chamber

29‧‧‧Interval space

3‧‧‧Knee flexion adjustment unit

31‧‧‧First Shunt Ring

311‧‧‧First Central Diversion

312‧‧‧ first side split hole

32‧‧‧First throt

321‧‧‧The first surrounding department

322‧‧‧ first body

323‧‧‧First throttling space

324‧‧‧The first section of the runner

325‧‧‧The first orifice

33‧‧‧First fixed sleeve

34‧‧‧First fine adjustment screw

341‧‧‧ first end

342‧‧‧First screw head

35‧‧‧First washer

36‧‧‧First gasket

37‧‧‧First spring

38‧‧‧ First fine-tuning

381‧‧‧ first joint

382‧‧‧First fine-tuning column

4‧‧‧Knee extension damping adjustment element

41‧‧‧Second diverter ring

411‧‧‧Second medium split hole

412‧‧‧Second side split hole

42‧‧‧Second throttle

421‧‧‧Second Surroundings

422‧‧‧Second body

423‧‧‧Second throttling space

424‧‧‧Second section runner

425‧‧‧Second orifice

43‧‧‧Second fixing sleeve

44‧‧‧Second fine adjustment screw

441‧‧‧second end

442‧‧‧Second screw head

45‧‧‧second washer

46‧‧‧Second gasket

47‧‧‧Second spring

48‧‧‧Second fine-tuning

481‧‧‧Second junction

482‧‧‧Second fine-tuning column

5‧‧‧First fluid path

6‧‧‧Second fluid path

[Prior technology]

7‧‧‧Hydraulic buffer

71‧‧‧Piston chamber

72‧‧‧Piston

73‧‧‧buffer chamber

74‧‧‧Airbag

1 is a cross-sectional view showing a conventional hydraulic buffering device; FIG. 2 is a perspective view showing a preferred embodiment of the present pneumatic cushioning device; FIG. 3 is an exploded view of the preferred embodiment; Is a front view of the preferred embodiment; FIG. 5 is a partial perspective perspective view showing a housing of the preferred embodiment; FIG. 6 is a cross-sectional view taken along line VI-VI of FIG. The connecting relationship between a knee flexing through hole and a knee extending damping through hole respectively and a buffer space is shown in FIG. 7 is a cross-sectional view taken along line VII-VII in FIG. 4, illustrating the preferred embodiment. The communication relationship between the three outer passages and the one knee flexing mounting groove, and the communication relationship between the inner through hole and the one knee extension damping groove; FIG. 8 is a cross-sectional view taken along line VIII-VIII in FIG. The connecting relationship between the four inner tube through holes, the upper air chamber and the one space in the preferred embodiment; FIG. 9 is a cross-sectional view taken along line IX-IX in FIG. A knee flexing adjustment unit of the preferred embodiment is mounted to the knee flexing mounting slot, and a knee extension damping adjustment unit is mounted to the knee extension damping mounting slot; FIG. 10 is an exploded view of FIG. 9; A cross-sectional view taken along the line XI-XI illustrates a first fluid path; FIG. 12 is a cross-sectional view taken along line XII-XII in FIG. 4, illustrating a second fluid path; FIG. 13 is a FIG. The partial enlarged view of the preferred embodiment illustrates a spacing relationship between a first tubular body portion and a first fine tuning column; and FIG. 14 is a partial enlarged view of FIG. 9 illustrating the preferred embodiment. A spaced relationship between a second tubular body and a second fine tuning column.

1‧‧‧Shell

11‧‧‧ base wall

13‧‧‧ Around the wall

131‧‧‧Outer channel

14‧‧‧Knee flexing installation slot

15‧‧‧Knee extension damping installation slot

18‧‧‧ bottom opening

19‧‧‧ bottom cover

2‧‧‧piston unit

21‧‧‧ piston rod

22‧‧‧Top cover

23‧‧‧ leakproof gasket

24‧‧‧Outer barrel

25‧‧‧Inner barrel

251‧‧‧The body of the barrel

252‧‧‧ Lower neck

253‧‧‧Upper neck

254‧‧‧Inner tube through hole

26‧‧‧ piston parts

3‧‧‧Knee flexion adjustment unit

31‧‧‧First Shunt Ring

311‧‧‧First Central Diversion

312‧‧‧ first side split hole

32‧‧‧First throt

321‧‧‧The first surrounding department

322‧‧‧ first body

323‧‧‧First throttling space

325‧‧‧The first orifice

33‧‧‧First fixed sleeve

34‧‧‧First fine adjustment screw

341‧‧‧ first end

342‧‧‧First screw head

35‧‧‧First washer

36‧‧‧First gasket

37‧‧‧First spring

38‧‧‧ First fine-tuning

381‧‧‧ first joint

382‧‧‧First fine-tuning column

4‧‧‧Knee extension damping adjustment unit

41‧‧‧Second diverter ring

411‧‧‧Second medium split hole

412‧‧‧Second side split hole

42‧‧‧Second throttle

421‧‧‧Second Surroundings

422‧‧‧Second body

423‧‧‧Second throttling space

425‧‧‧Second orifice

43‧‧‧Second fixing sleeve

44‧‧‧Second fine adjustment screw

441‧‧‧second end

442‧‧‧Second screw head

45‧‧‧second washer

46‧‧‧Second gasket

47‧‧‧Second spring

48‧‧‧Second fine-tuning

481‧‧‧Second junction

482‧‧‧Second fine-tuning column

Claims (11)

An air pressure buffering device comprising: a housing defining a knee flexing mounting slot, a knee damper mounting slot not directly communicating with the knee flexing mounting slot, and a damper mounting slot and the knee damper mounting a buffer space below the slot and communicating with the first two; a piston unit comprising an outer cylinder disposed on the housing, an inner cylinder disposed in the outer cylinder, and a driveable a piston member that is displaced up and down in the inner cylinder, and a space between the outer cylinder and the inner cylinder that communicates with the knee damper mounting groove, the piston member is separated from the inner cylinder An upper air chamber communicating with the space and a lower air chamber communicating with the knee damper mounting groove; a knee flexing adjustment unit mounted on the knee damper mounting groove and configured to adjust the displacement of the piston member through the knee damper installation a fluid flow rate of the groove; and a knee extension damping adjustment unit mounted to the knee extension damping mounting groove for adjusting the fluid flow rate of the mounting groove through the knee extension when the piston member is displaced. The air pressure buffer device according to claim 1, wherein the housing further includes a base wall located above the knee flexing mounting groove and the knee extension damping slot, and extending upward from the base wall for The outer cylinder is joined to the outer surrounding wall, the inner cylinder has a uniform inner diameter and has a barrel body portion located above the top surface of the surrounding wall, and a downwardly extending bottom surface of the barrel body portion and abuts the surrounding wall The lower neck portion of the wall surface An upper neck portion extending upwardly, and an inner tube through hole penetrating the upper neck portion and communicating the space with the upper air chamber, wherein the outer diameter of the lower neck portion and the upper neck portion are both Less than the barrel body portion. The air pressure cushioning device of claim 2, wherein the housing further comprises a plurality of outer peripheral walls extending from the surrounding wall and the base wall to communicate the spacing space with the knee flexing mounting groove a passage, an inner through hole penetrating the base wall to communicate the lower air chamber with the knee damper mounting groove, a partition wall located below the knee damper mounting groove and the knee damper mounting groove, and a partition wall The knee-damping mounting groove communicates with the buffer space, and a knee-sucking through-hole that penetrates the partition wall to connect the knee-stable damper mounting groove to the buffer space. The air pressure buffering device according to claim 3, wherein the knee flexing mounting groove has a first opening communicating with the outside from the outside to the inside, and a first communicating with the space through the outer passage An outer mounting portion, and a first inner mounting portion communicating with the buffer space through the knee flexing through hole; the knee flexing adjustment unit includes a first shunt ring disposed mainly on the first inner mounting portion, and a portion is disposed on the first inner mounting portion The first outer mounting portion is adjacent to the first fixing sleeve at the first opening, a first throttle tube mainly located between the first shunt ring and the first fixing sleeve, and is displaceably located at the first a first fine adjustment screw in the throttle tube, and a first fine adjustment screw displaceably disposed in the first fixing sleeve and combined with the first fine adjustment member; the first fine adjustment screw and the first fixing sleeve The first opening is closed by the tube, and the first diverter ring is configured to pass the first throttle tube to the first outer tube and the first outer mounting portion and the first inner mounting portion In communication, the first fine adjustment screw portion is located in the first throttle tube and is displaced by the displacement thereof to control the movement of the first fine adjustment member, thereby controlling the flow of fluid into the first throttle tube. The air pressure buffering device of claim 4, wherein the first diverter ring has a first intermediate diverting hole, and a plurality of first side diverting holes surrounding the first intermediate diverting hole; The flow tube has a first surrounding portion fixed in the first fixing sleeve, a first tubular body extending rearward from the first surrounding portion and passing through the first intermediate diverting hole of the first diverting ring a first throttle space defined by the first surrounding portion, a first throttle passage defined by the first tubular body portion and communicating with the first throttle space, and a plurality of through the first a first throttle hole communicating with the first throttle space; the first outer mounting portion is in communication with the first throttle holes, the first inner mounting portion is in communication with the first throttle channel; The damping adjustment unit further includes a first gasket disposed on the first diverter ring and capable of separately closing the first side diversion holes adjacent to the opening of the first outer mounting portion, and a set is disposed on the first shunt ring a first gasket of the first gasket, and a set of the first tube body portion and the two ends respectively The first surrounding portion and the first spring of the first spacer, the first spring abutting against the first spacer and forcing the first gasket to close the first side shunting holes to form a one-way valve structure, When the fluid is driven by the force, the first gasket can be pushed through the first side split holes to flow from the first inner mounting portion to the first outer mounting portion, but cannot flow from the first outer mounting portion to the a first inner mounting portion, the first fine adjustment screw has a first end located in the first throttle space, and the first fine adjustment member has a first throttle portion a first joint portion combined with the first end portion, and a first fine adjustment column extending rearward from the first joint portion and partially located in the first throttle passage, the first fine adjustment column and the first A gap is maintained between the tubes, and the first fine adjustment column is displaceable within the first throttle to adjust the flow of fluid in the first throttle. The air pressure cushioning device of claim 5, wherein the first fine adjustment column tapers away from the first joint portion. The air pressure buffering device according to the third or sixth aspect of the invention, wherein the knee damper mounting groove has a second opening communicating with the outside from the outside to the inside, and passing through the inner through hole a second outer mounting portion communicating with the lower air chamber, and a second inner mounting portion communicating with the buffer space through the knee-extending damper through hole; the knee extension damping adjusting unit includes a second inner mounting portion a second shunt ring, a second fixing sleeve disposed at the second outer mounting portion adjacent to the second opening, a second throttle tube mainly located between the second shunt ring and the second fixing sleeve, a second fine adjustment member displaceably disposed in the second throttle tube, and a second fine adjustment screw displaceably disposed in the second fixed sleeve and combined with the second fine adjustment member; the second The fine adjustment screw and the second fixing sleeve together enclose the second opening, the second diverter ring is configured for the second throttle tube to pass through the second throttle tube and the second outer mounting portion and the second inner portion The mounting portion is in communication, and the second trimming screw portion is located in the second throttle tube And its displacement by the movement of the driven member of the second trimming, and thus control the fluid flow into the second flow within the tube. According to the air pressure buffer device of claim 7, wherein The second diverter ring has a second splitter hole and a plurality of second splitter holes surrounding the second splitter hole; the second throttle has a portion fixed in the second fixed sleeve a second surrounding portion extending from the second surrounding portion and passing through the second central dividing hole of the second dividing ring, and a second throttle space defined by the second surrounding portion a second throttle body defined by the second tubular body portion and communicating with the second throttle space, and a plurality of second throttle holes extending through the second surrounding portion and the second throttle space The second outer mounting portion is in communication with the second throttle holes, and the second inner mounting portion is in communication with the second throttle channel; the knee extension damping adjustment unit further includes a set of the second shunt ring disposed on the second shunt ring Separably closing the second gasket of the second side distribution hole adjacent to the opening of the second outer mounting portion, a second spacer disposed on the second shunt ring and abutting the second gasket, and a set of And the second spring of the second tubular body portion and the two ends respectively abut against the second surrounding portion and the second spacer Abutting the second gasket to force the second gasket to close the second side split holes to form a one-way valve structure, such that the second washer can be pushed through the second side split holes when the fluid is driven by force And flowing from the second inner mounting portion to the second outer mounting portion, but not from the second outer mounting portion to the second inner mounting portion; the second fine adjustment screw has a second throttle space a second end portion, the second fine adjustment member has a second joint portion coupled to the second end portion in the second throttle space, and a rearward extending portion from the second joint portion and partially located at the second joint portion a second fine adjustment column in the second flow channel, the second fine adjustment column and the second tube body portion maintain a gap, and the second fine adjustment column is displaceable in the second throttle channel to adjust the fluid to the second The flow in the throttle. The air pressure cushioning device of claim 8, wherein the second fine adjustment column is tapered toward a direction away from the second joint portion. The air pressure buffer device of claim 9, wherein the housing further defines an air passage between the knee flexing mounting groove and the knee extension damping slot, the air passage being connected to the buffer space And used to supplement the gas in the air pressure buffer device. The air pressure buffer device according to claim 10, wherein the gas pressure inside is 170 to 230 PSI.