CN211841975U - Accompanying chair with ratchet wheel type knee joint - Google Patents
Accompanying chair with ratchet wheel type knee joint Download PDFInfo
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- CN211841975U CN211841975U CN201922467266.8U CN201922467266U CN211841975U CN 211841975 U CN211841975 U CN 211841975U CN 201922467266 U CN201922467266 U CN 201922467266U CN 211841975 U CN211841975 U CN 211841975U
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Abstract
The utility model provides a retinue chair with ratchet formula knee joint, include: a foot fixing frame for fixing a user's foot; an ankle joint module provided on the foot fixing frame for supporting an ankle joint; the shank connecting rod is arranged on the ankle joint module; the front shank supporting plate is of a semicircular arc-shaped plate structure, is fixed at the top of the shank connecting rod and is used for supporting a shank; the lower leg gear connecting rod is detachably connected with the lower leg connecting rod, the top end of the lower leg gear connecting rod is provided with a first gear, and the center of the first gear is provided with a first round hole; the bottom end of the thigh gear connecting rod is provided with a second gear meshed with the first gear, and the center of the second gear is provided with a second round hole; the thigh rear supporting plate is of a semicircular arc-shaped plate-shaped structure, is fixed at the top of the thigh gear connecting rod and is used for supporting the thigh; and the spring pre-tightening self-unlocking unidirectional ratchet wheel module is arranged at the joint of the shank gear connecting rod and the thigh gear connecting rod. The utility model discloses a passive wearable equipment, but many grades of lockings are adjusted.
Description
Technical Field
The utility model belongs to the technical field of wearable equipment, a retinue chair is related to, concretely relates to retinue chair with ratchet formula knee joint.
Background
The workman of assembly line in the present mill, doctor in the hospital before the operation table, the teacher who gives lessons in the school need maintain for a long time and stand or half the posture of squatting and carry out the operation, lead to low limbs muscle to be in a fixed state for a long time, make this kind of crowd's shank accumulation fatigue easily, carry out long-time repetitive work for a long time, cause all kinds of low limbs occupational diseases more easily. Therefore, in order to solve the problem of the type, the lower limb exoskeleton for work needs to be worn, and the existing exoskeleton equipment is a plurality of active driving equipment which needs to be driven by a motor and needs to be charged after being used for a certain time; passive equipment has only added a spacing lock in knee joint department, and latched position is single, and needs artificial manual unblock, and if the wearer forgets the unblock, has great risk of falling down. In addition, whether the active device or the passive device is designed in an under-constrained state, and redundant mechanical parts for increasing stability are more, the weight is larger, the gait behavior of the user can be interfered, and the user can feel great discomfort when walking, particularly in special modes such as going upstairs and downstairs. It is therefore desirable to design an apparatus that solves the above problems.
SUMMERY OF THE UTILITY MODEL
The present invention has been made to solve the above problems, and an object of the present invention is to provide a chairlift having a ratchet type knee joint.
The utility model provides a retinue chair with ratchet formula knee joint has such characteristic, include: a foot fixing frame for fixing a user's foot; an ankle joint module provided on the foot fixing frame for supporting an ankle joint; the shank connecting rod is arranged on the ankle joint module; the front shank supporting plate is of a semicircular arc-shaped plate structure, is fixed at the top of the shank connecting rod and is used for supporting a shank; the lower leg gear connecting rod is detachably connected with the lower leg connecting rod, the top end of the lower leg gear connecting rod is provided with a first gear, and the center of the first gear is provided with a first round hole; the bottom end of the thigh gear connecting rod is provided with a second gear meshed with the first gear, and the center of the second gear is provided with a second round hole; the thigh rear supporting plate is of a semicircular arc-shaped plate-shaped structure, is fixed at the top of the thigh gear connecting rod and is used for supporting the thigh; and a spring pre-tensioned self-unlocking unidirectional ratchet module comprising: the joint inner side cover plate is arranged on the inner sides of the shank gear connecting rod and the thigh gear connecting rod; the structure limiting block is arranged on the inner side of the joint inner side cover plate and used for limiting the rotation angle of the knee joint; the first sliding sleeve is arranged on the inner side of the shank gear connecting rod; the second sliding sleeve is arranged on the inner side of the thigh gear connecting rod; the ratchet wheel is sleeved on the periphery of the first sliding sleeve, and a cylindrical bulge is arranged on the surface of the ratchet wheel; the ratchet wheel shifting sheet is attached to the ratchet wheel, and the end part of the ratchet wheel shifting sheet is provided with a cylindrical protrusion insertion arc-shaped groove which rotates by 50 degrees; the pawl is sleeved on the periphery of the second sliding sleeve; the pre-tightening spring is used for generating pre-tightening force to enable the pawl to be in contact with the ratchet wheel or the ratchet wheel plectrum, and one end of the pre-tightening spring is fixed at the pawl protruding fixed end on the pawl, and the other end of the pre-tightening spring is fixed at the thigh gear connecting rod protruding fixed end at the edge of the thigh gear connecting rod; and the joint outer side cover plate is arranged on the outer sides of the ratchet plectrum and the pawl and is connected with the joint inner side cover plate through three bolts, wherein a rotating shaft of the pawl is coaxial with thigh side joint shafts of the joint inner side cover plate and the joint outer side cover plate and rotates around the shaft, a central shaft of the ratchet wheel, a rotating shaft of the ratchet plectrum and a rotating shaft of the shank gear connecting rod are coaxial with shank side joint shafts of the joint inner side cover plate and the joint outer side cover plate and rotate around the shafts, when an included angle between thighs and shanks of a user and a swing state change, the shank gear connecting rod rotates around the shank side joint shaft, so that a cylindrical bulge of the ratchet wheel slides in an arc-shaped groove of the ratchet plectrum and drives the ratchet plectrum to rotate around the shank side joint shaft, and the pawl and.
The utility model provides an in the retinue chair with ratchet formula knee joint, can also have such characteristic: wherein, the bottom of the foot fixing frame is fixed with an antiskid buffer rubber mat, and the opening is provided with a foot bandage for tying the foot.
The utility model provides an in the retinue chair with ratchet formula knee joint, can also have such characteristic: wherein, the ankle joint module includes: the ankle joint fixing frame comprises a first ankle joint hinge block connected with a lower leg connecting rod, a second ankle joint hinge block connected with the foot fixing frame and an adjusting bolt inserted into a long hole in the side edge of the first ankle joint hinge block and used for adjusting the forward inclination angle of the first ankle joint hinge block.
The utility model provides an in the retinue chair with ratchet formula knee joint, can also have such characteristic: wherein, the inside of backup pad is provided with 2 soft protection pads of shank before the shank, and 2 soft protection pads of shank have formed V type protection pads, still is provided with two shank bandages that are used for tying up the shank before the shank on the backup pad, and the inside of backup pad is provided with the soft protection pad of thigh behind the thigh, still is provided with two thigh bandages that are used for tying up the thigh behind the thigh on the backup pad.
The utility model provides an in the retinue chair with ratchet formula knee joint, can also have such characteristic: wherein, the shank flexible protection pad and the thigh flexible protection pad are respectively made of filler, outer fabric wrapped outside the filler and magic tapes with barbed hair connected with the outer fabric at one side and with the other side adhered to the inner side surfaces of the shank front support plate and the thigh front support plate.
The utility model provides an in the retinue chair with ratchet formula knee joint, can also have such characteristic: wherein, the ratchet wheel and the shank gear connecting rod are fixed by three screws.
The utility model provides an in the retinue chair with ratchet formula knee joint, can also have such characteristic: the thigh gear connecting rod, the joint inner side cover plate and the joint outer side cover plate are hinged to a thigh side joint shaft, the shank gear connecting rod, the joint inner side cover plate and the joint outer side cover plate are hinged to a shank side joint shaft, and gear teeth at the end part of the thigh gear connecting rod are meshed with gear teeth at the end part of the shank gear connecting rod.
The utility model provides an in the retinue chair with ratchet formula knee joint, can also have such characteristic: wherein the range of the rotation angle of the double rotation shafts of the knee joint is 0-130 degrees, and the locking angle between the pawl and the ratchet wheel is 50 degrees, 70 degrees and 90 degrees.
Action and effect of the utility model
According to the utility model, the accompanying chair with ratchet wheel type knee joint has the foot fixing frame, so that the feet of the user can be fixed; because of having the ankle module hinged with the foot fixing frame, it is possible to support the ankle; because the top of the shank connecting rod is fixed with the shank front supporting plate, the shank can be supported; the thigh rear supporting plate is fixed at the top of the thigh gear connecting rod, so that the thigh can be supported; the spring pre-tightening self-unlocking one-way ratchet wheel module is provided with a structure limiting block, so that the rotation angle of the double rotation shafts of the knee joint can be limited; because the surface of the ratchet wheel of the spring pre-tightening self-unlocking one-way ratchet wheel module is provided with an arc-shaped groove, the cylindrical protrusion of which is inserted into the end part of the ratchet wheel shifting piece and the rotation angle of which is 50 degrees, the cylindrical protrusion of the ratchet wheel can slide in the arc-shaped groove of the ratchet wheel shifting piece and drive the ratchet wheel shifting piece to rotate around the crus side joint shaft while the crus gear connecting rod rotates around the crus side joint shaft, so that the pawl and the ratchet wheel are controlled to be in a locking state or an unlocking state; because the spring pre-tightening self-unlocking unidirectional ratchet wheel module is provided with the pre-tightening spring of which one end is fixed at the pawl protrusion fixed end on the pawl and the other end is fixed at the thigh gear connecting rod protrusion fixed end at the edge of the thigh gear connecting rod, the pre-tightening force can be generated, so that the pawl is contacted with the ratchet wheel or the ratchet wheel plectrum, and the pawl can be contacted with the ratchet wheel or the ratchet wheel plectrum frequently, thereby ensuring the self-locking performance; because the spring pre-tightening self-unlocking unidirectional ratchet module is provided with the joint inner side cover plate and the joint outer side cover plate, the structures in the spring pre-tightening self-unlocking unidirectional ratchet module can be protected.
Therefore, the utility model discloses a retinue chair with ratchet formula knee joint has the two pivot knee joints of spring pretension self-unlocking unidirectional ratchet module, and can carry out the rotary motion of single degree of freedom at 0-130 within range, in addition, can also be according to the change of contained angle and swing state between the big shank for the ratchet plectrum slides in the ratchet plectrum along with the cylinder arch on the ratchet, drives the ratchet plectrum rotation, thereby control pawl and ratchet locking or unblock, and can lock at adjustable 50 °, 70 °, 90 three angle gears.
To sum up, the utility model discloses a retinue chair with ratchet formula knee joint is passive wearable equipment, need not battery powered, need not manual locking and unblock equipment, can also adjust the latched position by many grades, can closely tie up with the human body and tie up, in addition, because most parts adopt carbon fibre and light metal material, so the integrated device is comparatively light, reduce user's burden sense, can not produce too big interference to the gait, make the user can not produce uncomfortable sense when the walking, the use comfort of wearer has been improved, solved simultaneously because maintain for a long time stand or the gesture of squatting carries out the low limbs muscle that the operation leads to and be in a state for a long time, and then make the tired problem of shank accumulation, and solved because carry out the problem of the all kinds of occupational diseases of long-time repetitive work initiation for a long time.
Drawings
FIG. 1 is a schematic view of a walker chair with a ratchetable knee joint in an embodiment of the present invention;
FIG. 2 is a schematic view of a foot securing frame and ankle module of a walker chair having a ratchetable knee joint in an embodiment of the present invention;
fig. 3 is a schematic structural view of a spring-preloaded self-unlocking unidirectional ratchet module of a walker with a ratchet-type knee joint according to an embodiment of the present invention;
fig. 4 is a schematic view illustrating the working status process of the spring pre-tightening self-unlocking unidirectional ratchet module of the following chair with the ratchet type knee joint according to the embodiment of the present invention.
Detailed Description
In order to make the technical means and functions of the present invention easy to understand, the present invention will be described in detail with reference to the following embodiments and accompanying drawings.
Example (b):
fig. 1 is a schematic structural view of a walker with a ratchet-type knee joint according to an embodiment of the present invention.
As shown in fig. 1, the chairlift with a ratchetable knee joint of the present embodiment includes: the foot fixing frame 10, the ankle joint module 20, the shank link 30, the shank anterior support plate 40, the shank gear link 50, the thigh gear link 60, the thigh posterior support plate 70 and the spring pre-tightening self-unlocking one-way ratchet module 80.
Fig. 2 is a schematic view of a foot securing frame and an ankle module of a walker chair having a ratchetable knee joint in an embodiment of the present invention.
As shown in fig. 2, the foot fixing frame 10 is used for fixing the foot of the user, and has a non-slip cushion 101 fixed to the bottom thereof and a foot strap 102 for tying the foot at the opening thereof.
An ankle module 20 is provided on the foot fixing frame 10 for supporting an ankle, and includes: a first ankle joint hinge block 201 connected with the lower leg link by a set of first fixing bolts 204, a second ankle joint hinge block 202 connected with the foot fixing frame 10 by two sets of second fixing bolts 205, and an adjusting bolt 203 inserted into a long hole at the side of the first ankle joint hinge block 201 and used for adjusting the forward-tilting angle of the first ankle joint hinge block 201.
In this embodiment, the central axis of the circular hole of the first ankle hinge block 201 coincides with the rotation axis of the second ankle hinge block 202, and the first ankle hinge block 201 and the second ankle hinge block 202 are provided with a protruding structure near the heel side for limiting and allowing the first ankle hinge block 201 to rotate 45 ° backward.
The lower leg link 30 is disposed on the ankle module 20.
The lower leg front support plate 40 is a semicircular arc-shaped plate-shaped structure, is fixed on the top of the lower leg connecting rod 30 and is used for supporting the lower leg.
In this embodiment, the anterior calf support plate 40 is secured specifically at the mid-portion of the calf link 30 to the end near the ankle joint.
In this embodiment, 2 calf flexible pads 401 are disposed inside the anterior calf support plate 40, the 2 calf flexible pads 401 form a V-shaped pad 403, two calf straps 402 for binding calves are further disposed on the anterior calf support plate 40, and the calf straps 402 are located on the posterior calf side.
In this embodiment, the 2 calf flexible pads 401 of the anterior calf support plate 40 are positioned on either side of the vertical centerline of the support plate and have a groove near the centerline, thus forming a V-shaped structure that better conforms to the anterior calf shank contour.
The shank gear connecting rod 50 is connected with the shank connecting rod 30 through two groups of detachable bolts 501, the top end of the shank gear connecting rod is provided with a first gear, the center of the first gear is provided with a first round hole 502, and the shank gear connecting rod 50 and the shank connecting rod 30 can be adjusted in length to match the shank length of a user to wear.
The bottom end of the thigh gear link 60 is provided with a second gear engaged with the first gear, and a second circular hole 601 is opened at the center of the second gear.
The rear thigh support plate 70 has a semicircular arc plate-shaped structure, and is fixed to the top of the thigh gear link 60 to support the thigh.
In this embodiment, the rear thigh support plate 70 is specifically located at the middle of the thigh gear link 60 to the end near the trunk, and the end of the rear thigh support plate 70 near the knee joint is attached to the thigh.
In this embodiment, a flexible thigh pad 701 is disposed inside the back thigh supporting plate 70, and two thigh straps 702 for binding the thighs are disposed on the back thigh supporting plate.
In this embodiment, the shank flexible pad 401 and the thigh flexible pad 701 are made of a filler, an outer fabric wrapped outside the filler, and a magic tape having a barbed hair connected to the outer fabric on one side and adhered to the inner surface of the front shank support plate 40 and the inner surface of the front thigh support plate 70 on the other side.
In this embodiment, outer fabric uses knitting or veneer mode to seal, divide into two sides, and the one side is the soft hair fibre face of being connected with the magic subsides one side that has the collude thorn hair, and the opposite side is the antiskid face of coating anti-skidding rubber.
In this embodiment, the shape of the pad is the same as or similar to the shape of the front flap of the lower leg, so that the pad can fit the lower leg and the upper leg.
Fig. 3 is a schematic structural diagram of a spring pre-tensioned self-unlocking unidirectional ratchet module of a walker with a ratchet type knee joint according to an embodiment of the present invention.
As shown in fig. 3, the spring-preloaded self-unlocking one-way ratchet module 80 includes: an inner joint side cover plate 801, a structural limiting block 802, a first sliding sleeve 803, a second sliding sleeve 804, a ratchet 805, a ratchet pulling sheet 806, a pawl 807, a pre-tightening spring 808 and an outer joint side cover plate 809.
The joint inner cover 801 is provided on the inner side of the lower leg gear link 50 and the thigh gear link 60.
The structure limiting block 802 is disposed on the inner side of the joint inner cover plate 801 for limiting the rotation angle of the knee joint dual rotation axis.
The first runner 803 is provided inside the lower leg gear link 50.
Second sliding sleeve 804 is disposed on the inside of thigh gear link 60.
The ratchet 805 is sleeved on the periphery of the first sliding sleeve 803, a cylindrical protrusion 8010 is disposed on the surface of the first sliding sleeve, and the ratchet 805 and the lower leg gear link 50 are fixed by three screws 8013.
The ratchet pick 806 is attached to the ratchet 805 and has an arcuate slot 8011 at the end thereof for receiving the cylindrical protrusion 8010, which is angled by 50 °.
The pawl 807 is disposed around the second sleeve 804.
The joint outer cover 809 is provided on the outer side of the ratchet wheel 806 and the pawl 807, and is connected to the joint inner cover 801 by three bolts.
In this embodiment, a first bolt hole 8014, a second bolt hole 8015 and a third bolt hole 8016 are formed in the joint outer side cover plate 809, a fourth bolt hole 8017 is formed in the joint inner side cover plate 801, the inner side surface of the joint inner side cover plate has a first bolt fixing piece 8018 and a second bolt fixing piece 8019 which respectively pass through the first round hole 502 and the second round hole 601, and the joint inner side cover plate 801 and the joint outer side cover plate 809 are connected by a second bolt 8021 which sequentially passes through the first bolt hole 8014, the first sliding sleeve 803, the first round hole 502 and the first bolt fixing piece 8018, a second bolt hole 8015, the second sliding sleeve 804, the second round hole 601 and the second bolt fixing piece 8019, and a third bolt hole 8022 which sequentially passes through the third bolt hole 8016, the structure limiting block 802 and the fourth bolt hole 8017.
In this embodiment, the rotation axis of the pawl 807 is coaxial with and rotates about the thigh-side joint axis of the joint inner cover plate 801 and the joint outer cover plate 809, and the center axis of the ratchet 805, the rotation axis of the ratchet paddle 806, and the rotation axis of the shank gear link 50 are coaxial with and rotate about the shank-side joint axis of the joint inner cover plate 801 and the joint outer cover plate 809.
In this embodiment, when the angle between the thigh and the calf and the swing state change, the calf gear link 50 rotates around the calf side joint axis, so that the cylindrical protrusion 8010 of the ratchet 805 slides in the arc groove 8011 of the ratchet dial 806, and drives the ratchet dial 806 to rotate around the calf side joint axis, thereby controlling the pawl 807 and the ratchet 805 to be in the locked state or the unlocked state.
In this embodiment, the thigh gear link 60, the joint inner side cover plate 801 and the joint outer side cover plate 809 are hinged to the thigh side joint shaft, the shank gear link 50, the joint inner side cover plate 801 and the joint outer side cover plate 809 are hinged to the shank side joint shaft, the teeth of the end of the thigh gear link 60 and the teeth of the end of the shank gear link 50 are meshed with each other, the range of the rotation angle of the dual rotation axes of the knee joint is 0 ° to 130 °, and the locking angle between the pawl 807 and the ratchet 805 is 50 °, 70 ° and 90 °.
Furthermore, most parts in the embodiment are made of carbon fiber and light metal materials, so that the whole device is light and convenient, and the load sense of a user is reduced.
Fig. 4 is a schematic view illustrating the working status process of the spring pre-tightening self-unlocking unidirectional ratchet module of the following chair with the ratchet type knee joint according to the embodiment of the present invention.
The spring pre-loads the locking and self-unlocking functions of the self-unlocking one-way ratchet die 80 as shown in fig. 4. When the knee of the user enters the bending state from the upright state, the cylindrical protrusion 8010 of the ratchet 805 touches one side of the arc-shaped groove 8011 of the ratchet dial 806 and rotates the ratchet 805 in the direction of the side, when the knee moves back to the upright state again, the cylindrical protrusion 8010 moves back, the ratchet dial 806 does not rotate until touching the other side of the arc-shaped groove 8011 of the ratchet dial 806, the ratchet of the ratchet 805 can be engaged with the pawl 807, at the moment, the knee bends again, and the knee enters the one-way locking state due to the pressure-bearing engagement of the ratchet 805 and the ratchet 807, cannot be bent further, but can move back to the upright state, and the locking state locks in the three angular gear positions of 50 degrees, 70 degrees and 90 degrees of the rotation angle of the knee joint. When the rotation angle exceeds 90 °, the cylindrical protrusion 8010 of the ratchet 805 contacts the other side of the ratchet dial 806 and dials it in the opposite direction, and when the rotation angle exceeds a certain angle, the outer edge of the ratchet dial 806 collides with the teeth of the pawl 807, and the pawl 807 is dialed up in the direction of releasing occlusion, and the knee joint is in an unlocked state.
Effects and effects of the embodiments
According to the pallet with the ratchet type knee joint according to the present embodiment, since the pallet has the foot fixing frame, the foot of the user can be fixed; because of having the ankle module hinged with the foot fixing frame, it is possible to support the ankle; because the top of the shank connecting rod is fixed with the shank front supporting plate, the shank can be supported; the thigh rear supporting plate is fixed at the top of the thigh gear connecting rod, so that the thigh can be supported; the spring pre-tightening self-unlocking one-way ratchet wheel module is provided with a structure limiting block, so that the rotation angle of the double rotation shafts of the knee joint can be limited; because the surface of the ratchet wheel of the spring pre-tightening self-unlocking one-way ratchet wheel module is provided with an arc-shaped groove, the cylindrical protrusion of which is inserted into the end part of the ratchet wheel shifting piece and the rotation angle of which is 50 degrees, the cylindrical protrusion of the ratchet wheel can slide in the arc-shaped groove of the ratchet wheel shifting piece and drive the ratchet wheel shifting piece to rotate around the crus side joint shaft while the crus gear connecting rod rotates around the crus side joint shaft, so that the pawl and the ratchet wheel are controlled to be in a locking state or an unlocking state; because the spring pre-tightening self-unlocking unidirectional ratchet wheel module is provided with the pre-tightening spring of which one end is fixed at the pawl protrusion fixed end on the pawl and the other end is fixed at the thigh gear connecting rod protrusion fixed end at the edge of the thigh gear connecting rod, the pre-tightening force can be generated, so that the pawl is contacted with the ratchet wheel or the ratchet wheel plectrum, and the pawl can be contacted with the ratchet wheel or the ratchet wheel plectrum frequently, thereby ensuring the self-locking performance; because the spring pre-tightening self-unlocking unidirectional ratchet module is provided with the joint inner side cover plate and the joint outer side cover plate, the structures in the spring pre-tightening self-unlocking unidirectional ratchet module can be protected.
According to the accompanying chair with the ratchet type knee joint, the anti-slip buffer rubber pad is fixed at the bottom of the foot fixing frame, so that a user can be prevented from slipping and falling during use; because the opening part of the foot fixing frame is provided with the foot binding belt, the foot can be bound, and then the foot is arranged on the foot fixing frame, so that walking is facilitated.
According to the pallet chair with the ratchet-type knee joint related to the present embodiment, since the adjustment bolt is inserted into the first ankle hinge block side long hole, the forward-tilt angle of the first ankle hinge block can be adjusted by adjusting the screw-in depth of the adjustment bolt.
According to the accompanying chair with the ratchet type knee joint, 2 pieces of lower leg flexible pads form the V-shaped pads, so that the accompanying chair is more suitable for the leg shape of the lower leg and protects the lower leg from being injured; because the two shank binding bands are arranged on the shank front support plate, the shanks can be bound, so that the shanks can be better fixed; because the inside of backup pad is provided with the flexible protection pad of thigh behind the thigh, and still be provided with two thigh bandages that are used for tying up the thigh behind the thigh on the backup pad, so can fix better and protect the thigh.
Therefore, the accompanying chair with the ratchet type knee joint of the embodiment is provided with the double-rotating-shaft knee joint of the spring pre-tightening self-unlocking unidirectional ratchet module, can perform single-degree-of-freedom rotation movement within the range of 0-130 degrees, and can enable the ratchet plectrum to slide in the ratchet plectrum along with the cylindrical protrusion on the ratchet according to the change of the included angle and the swing state between the upper leg and the lower leg so as to drive the ratchet plectrum to rotate, so that the pawl and the ratchet are controlled to be locked or unlocked, and the locking can be performed at three adjustable angle gears of 50 degrees, 70 degrees and 90 degrees.
In conclusion, the retinue chair with ratchet formula knee joint of this embodiment is passive wearable equipment, need not battery powered, need not manual locking and unblock equipment, can also many grades adjust the latched position, can closely tie up with the human body, in addition, because most parts adopt carbon fiber and light metal material, so the integrated device is comparatively light, reduce user's sense of burden, can not produce too big interference to the gait, make the user can not produce uncomfortable sense when walking, the use comfort of wearing person has been improved, the problem of the low limbs muscle that leads to because the operation is carried out in the posture of keeping standing or half squatting for a long time is in a state for a long time has been solved simultaneously, and then make the tired problem of shank accumulation, and solved because carry out the problem of all kinds of low limbs occupational disease that long-time repetitive work arouses for a long time.
The above embodiments are preferred examples of the present invention, and are not intended to limit the scope of the present invention.
Claims (8)
1. A walker chair having a ratchetable knee joint, comprising:
a foot fixing frame for fixing a user's foot;
an ankle module provided on the foot fixing frame for supporting an ankle;
the shank connecting rod is arranged on the ankle joint module;
the front shank supporting plate is of a semicircular arc-shaped plate-shaped structure, is fixed at the top of the shank connecting rod and is used for supporting a shank;
the lower leg gear connecting rod is detachably connected with the lower leg connecting rod, the top end of the lower leg gear connecting rod is provided with a first gear, and the center of the first gear is provided with a first round hole;
the bottom end of the thigh gear connecting rod is provided with a second gear meshed with the first gear, and the center of the second gear is provided with a second round hole;
the thigh rear supporting plate is of a semicircular arc-shaped plate-shaped structure, is fixed at the top of the thigh gear connecting rod and is used for supporting a thigh; and
spring pretension is from unblock one-way ratchet module, includes:
the joint inner side cover plate is arranged on the inner sides of the shank gear connecting rod and the thigh gear connecting rod;
the structure limiting block is arranged on the inner side of the joint inner side cover plate and used for limiting the rotation angle of the knee joint;
the first sliding sleeve is arranged on the inner side of the shank gear connecting rod;
the second sliding sleeve is arranged on the inner side of the thigh gear connecting rod;
the ratchet wheel is sleeved on the periphery of the first sliding sleeve, and a cylindrical bulge is arranged on the surface of the ratchet wheel;
a ratchet wheel shifting sheet which is attached to the ratchet wheel and the end part of which is provided with a rotating angle of 50 degrees°The cylindrical protrusion is inserted into the arc-shaped groove;
the pawl is sleeved on the periphery of the second sliding sleeve;
the pre-tightening spring is used for generating pre-tightening force to enable the pawl to be in contact with the ratchet wheel or the ratchet plectrum, and one end of the pre-tightening spring is fixed at a pawl protrusion fixed end on the pawl, and the other end of the pre-tightening spring is fixed at a thigh gear connecting rod protrusion fixed end at the edge of the thigh gear connecting rod; and
the joint outer side cover plate is arranged on the outer sides of the ratchet plectrum and the pawl and is connected with the joint inner side cover plate through three bolts,
wherein a rotation axis of the pawl is coaxial with and rotates around a thigh-side joint axis of the joint inner side cover plate and the joint outer side cover plate,
the central shaft of the ratchet wheel, the rotating shaft of the ratchet wheel plectrum and the rotating shaft of the shank gear connecting rod are coaxial with and rotate around shank side joint shafts of the joint inner side cover plate and the joint outer side cover plate,
when the included angle between the thigh and the shank of the user and the swing state are changed, the shank gear connecting rod rotates around the shank side joint shaft, so that the cylindrical protrusion of the ratchet wheel slides in the arc-shaped groove of the ratchet wheel shifting piece, the ratchet wheel shifting piece is driven to rotate around the shank side joint shaft, and the pawl and the ratchet wheel are controlled to be in a locking state or an unlocking state.
2. The ottoman with a ratchetable knee joint of claim 1, wherein:
the bottom of the foot fixing frame is fixed with an anti-skid buffering rubber mat, and a foot binding belt used for binding the foot is arranged at the opening.
3. The ottoman with a ratchetable knee joint of claim 1, wherein:
wherein the ankle module comprises: the ankle joint fixing frame comprises a first ankle joint hinge block connected with the lower leg connecting rod, a second ankle joint hinge block connected with the foot fixing frame and an adjusting bolt inserted into a long hole in the side edge of the first ankle joint hinge block and used for adjusting the forward tilting angle of the first ankle joint hinge block.
4. The ottoman with a ratchetable knee joint of claim 1, wherein:
wherein 2 shank flexible protection pads are arranged inside the shank front support plate, the 2 shank flexible protection pads form a V-shaped protection pad, two shank binding bands for binding shanks are also arranged on the shank front support plate,
the inside of the back thigh supporting plate is provided with a flexible thigh protection pad, and the back thigh supporting plate is also provided with two thigh binding bands for binding the thighs.
5. The ottoman with a ratchetable knee joint of claim 4, wherein:
the shank flexible protection pad and the thigh flexible protection pad are respectively filled with filler, outer fabric wrapped outside the filler and magic tapes, wherein one side of each magic tape is connected with the outer fabric and is provided with barbed bristles, and the other side of each magic tape is adhered to the inner side surface of the front shank support plate and the inner side surface of the front thigh support plate.
6. The ottoman with a ratchetable knee joint of claim 1, wherein:
the ratchet wheel and the lower leg gear connecting rod are fixed through three screws.
7. The ottoman with a ratchetable knee joint of claim 1, wherein:
wherein the thigh gear connecting rod, the joint inner side cover plate and the joint outer side cover plate are hinged on the thigh side joint shaft,
the shank gear connecting rod, the joint inner side cover plate and the joint outer side cover plate are all hinged on the shank side joint shaft,
the gear teeth at the end of the thigh gear connecting rod are meshed with the gear teeth at the end of the shank gear connecting rod.
8. The ottoman with a ratchetable knee joint of claim 1, wherein:
wherein the range of the rotation angle of the knee joint is 0°-130°And the locking angle between the pawl and the ratchet wheel is 50°、70°、90°。
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922467266.8U CN211841975U (en) | 2019-12-31 | 2019-12-31 | Accompanying chair with ratchet wheel type knee joint |
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| CN201922467266.8U CN211841975U (en) | 2019-12-31 | 2019-12-31 | Accompanying chair with ratchet wheel type knee joint |
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| CN211841975U true CN211841975U (en) | 2020-11-03 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113580102A (en) * | 2021-06-28 | 2021-11-02 | 北京机械设备研究所 | Upper limb passive power assisting exoskeleton |
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2019
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113580102A (en) * | 2021-06-28 | 2021-11-02 | 北京机械设备研究所 | Upper limb passive power assisting exoskeleton |
| CN113580102B (en) * | 2021-06-28 | 2023-03-14 | 北京机械设备研究所 | Upper limb passive power assisting exoskeleton |
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