CN113116487B

CN113116487B - Spinal column orthopedic non-invasive growth rod

Info

Publication number: CN113116487B
Application number: CN201911401826.8A
Authority: CN
Inventors: 张立争
Original assignee: Minimally Invasive Investment Holdings Ltd
Current assignee: Shanghai Weiwei Investment Holding Co ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2022-09-06
Anticipated expiration: 2039-12-31
Also published as: CN113116487A

Abstract

The invention provides a spinal column correction non-invasive growth rod which comprises a box body assembly, a first connecting rod and a second connecting rod, wherein one end of the first connecting rod and one end of the second connecting rod are positioned on two opposite sides of the box body assembly, at least one of the ends of the first connecting rod and the second connecting rod is movably connected with the box body assembly, the other ends of the first connecting rod and the second connecting rod are respectively fixed on a spinal column, the box body assembly comprises a box body, a permanent magnet, a driving piece and a driven piece, the box body is provided with an inner cavity, the permanent magnet, the driving piece and the driven piece are arranged in the inner cavity, and the permanent magnet drives the first connecting rod and the second connecting rod to be far away or close to each other through the driving piece and the driven piece under the action of an in-vitro permanent magnet source so as to correct the spinal column.

Description

Spinal column orthopedic non-invasive growth rod

Technical Field

The invention belongs to the field of medical instruments, and particularly relates to a spine orthopedic non-invasive growth rod.

Background

The scoliosis of children is a malformed orthopedic disease which seriously influences the growth and development of children, and causes of the malformed orthopedic disease comprise idiopathic diseases, congenital diseases, neuromuscular diseases, syndromes and the like. The children scoliosis affects not only the appearance of the infant, but also the cardiopulmonary development caused by serious spinal deformity. Clinical practice proves that conservative treatment such as wearing a brace and the like for children with advanced scoliosis has poor curative effect and poor prognosis, and the early and positive operation control of the progress of deformity becomes common recognition in the field. For the treatment of children with scoliosis, attention is paid to the treatment of the three-dimensional structures of the coronal position, the sagittal position and the horizontal position, and because the children are in the growth and development stage, the treatment cannot influence or influence the growth and development of the children as little as possible, and the problems of spine correction and avoidance of influence on the growth and development of the spine and the thorax are urgently needed to be solved by children spinal surgeons.

In order to solve the difficulty in the treatment of the scoliosis of children, the technology of the spinal growing rod is produced. The spinal growth rod technique refers to the placement of a support system on both sides of the spine, which is capable of correcting scoliosis and has the ability to continuously correct. The growth rod can be continuously unfolded along with the natural growth and development of children so as to achieve the aim of continuous correction.

However, the existing spinal growth rod has the following technical problems in use: firstly, the spine growth rod needs to be operated every time of distraction, namely, a distraction lengthening operation is performed for an infant patient every 4-6 months, an internal fixing device is distracted to obtain spine growth, and on average, each infant patient needs to be operated 6 times, so that the infection rate is increased by a frequent operation scheme, scars are serious, the spontaneous fusion of the posterior path of the spine and the spontaneous fusion of costal joints are promoted by frequent operations, the stiffness of the lateral curvature of the spine is increased, and the problem that the extension cannot be performed in the middle period of the operation is caused possibly; meanwhile, repeated operations cause permanent and serious trauma to the body and mind of the infant patient, the treatment cost is high, and the occurrence rate of operation complications is extremely high; secondly, although there is also a technical solution at present, for example, as shown in patent application CN108703798A, the purpose of non-invasively spreading the growing rod is achieved by driving the permanent magnet inside the growing rod to rotate forward or backward through the external electromagnetic field, but this method cannot avoid the influence of the external non-active electromagnetic field, and is poor in reliability.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention aims to provide the spinal column orthopedic non-invasive growth rod capable of avoiding the influence of an external non-active electromagnetic field.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

the invention provides a spinal column correction non-invasive growing rod which comprises a box body assembly, a first connecting rod and a second connecting rod, wherein one end of the first connecting rod and one end of the second connecting rod are positioned on two opposite sides of the box body assembly, at least one of the ends of the first connecting rod and the second connecting rod is movably connected with the box body assembly, the other ends of the first connecting rod and the second connecting rod are respectively fixed on a spinal column, the box body assembly comprises a box body, a permanent magnet, a driving piece and a driven piece, the box body is provided with an inner cavity, the permanent magnet, the driving piece and the driven piece are arranged in the inner cavity, and the permanent magnet drives the first connecting rod and the second connecting rod to be far away from or close to each other through the driving piece and the driven piece under the action of an in-vitro permanent magnet source so as to correct the spinal column.

Preferably, the driving member comprises a main bevel gear, the driven member comprises a first secondary bevel gear, the main bevel gear and the first secondary bevel gear are mutually meshed, and the permanent magnet is used for driving the main bevel gear and the first secondary bevel gear to be changed from a separated state to a meshed state under the action of the extracorporeal permanent magnet source, so as to drive the first secondary bevel gear in the meshed state to rotate to realize the separation or approach between the first connecting rod and the second connecting rod.

Preferably, one end of the inner cavity is a first open end, one end of the second connecting rod is movably connected with the first open end, the first slave bevel gear is rotatably arranged at the first open end of the inner cavity so that the second connecting rod is far away from or close to the first open end, the main bevel gear is arranged at an angle with the first slave bevel gear, and the main bevel gear is rotatably and movably arranged in the inner cavity.

Preferably, in the direction of the rotation axis of the main bevel gear, the inner cavity is provided with a groove for accommodating the permanent magnet; the permanent magnet is connected with the main bevel gear, can move up and down and rotate relative to the groove, and the magnetization direction of the permanent magnet is consistent with the direction of the rotation axis of the main bevel gear.

Preferably, the box assembly further comprises a first shaft, a sleeve; the main bevel gear is axially fixed with one end of the first shaft and is in circumferential rotation connection with the first shaft; the sleeve is arranged in an inner cavity on one side opposite to the first shaft, the sleeve is provided with a first accommodating hole and an elastic piece, the elastic piece is arranged in the first accommodating hole, the other end of the first shaft extends into the first accommodating hole of the sleeve and is in contact with the elastic piece, and the elastic piece is used for providing elastic force to enable the main bevel gear and the first slave bevel gear to be in a separation state.

Preferably, the box body assembly further comprises a first bearing, an outer ring of the first bearing is fixed with the main bevel gear, and an inner ring of the first bearing is fixed with the first shaft, so that the main bevel gear and the first shaft are axially fixed and circumferentially and rotatably connected.

Preferably, the box body further comprises a first extension part, the first extension part is provided with a first extension hole and is communicated with the inner cavity through a first opening end; the box body assembly further comprises a first reversing assembly, the first reversing assembly is arranged in the first extending hole and used for converting the rotating motion of the first slave bevel gear into the movement of the second connecting rod.

Preferably, the first reversing assembly comprises a second shaft, a first guide rail and a first moving body, the second shaft is rotatably arranged in the first extending hole and extends to the second connecting rod, one end, close to the first opening end, of the second shaft is fixedly connected with the first driven bevel gear, one end, close to the second shaft, of the second connecting rod is provided with a second accommodating hole so as to accommodate one end, close to the second connecting rod, of the second shaft, the first guide rail is arranged on the first extending hole, the first moving body is in threaded connection with the second shaft, a protruding structure is arranged on the periphery of the first moving body, the protruding structure can slide along the first guide rail, and the first moving body is fixedly connected with or abutted against the second connecting rod.

Preferably, the box assembly further comprises a second bearing, an outer ring of the second bearing is fixed to the first extending hole, and an inner ring of the second bearing is fixed to the second shaft to support the second shaft.

Preferably, the box assembly further comprises a third shaft, one end of the third shaft is fixedly connected with the outer wall of the sleeve, and the other end of the third shaft is rotatably connected with the second shaft or is rotatably connected with the first driven bevel gear.

Preferably, the box assembly further comprises a third bearing, one end of the second shaft, which is close to the first slave bevel gear, further comprises a third accommodating hole, an outer ring of the third bearing is arranged in the third accommodating hole, and an inner ring of the third bearing is arranged on the third shaft; or, the first slave bevel gear further comprises a third accommodating hole, an outer ring of the third bearing is arranged in the third accommodating hole, and an inner ring of the third bearing is arranged on the third shaft.

Preferably, the box assembly comprises a second slave bevel gear, the second slave bevel gear and the main bevel gear can be mutually meshed, the inner cavity further comprises a second open end opposite to the first open end, one end of the first connecting rod is movably connected with the second open end, and the second slave bevel gear is rotatably arranged at the second open end of the inner cavity so as to enable the first connecting rod to be far away from or close to the second open end.

Preferably, the box body further comprises a second extending part which is provided with a second extending hole and is communicated with the inner cavity through a second opening end; the box body assembly further comprises a second reversing assembly, and the second reversing assembly is arranged in the second extending hole and used for converting the rotary motion of the second secondary bevel gear into the movement of the first connecting rod.

Preferably, the second switching-over subassembly includes the fourth shaft, the fourth shaft is rotatable set up in the second extends downtheholely, and extend to first connecting rod, the fourth shaft be close to the one end of second open end with bevel gear fixed connection is followed to the second, first connecting rod is close to the one end of fourth shaft is equipped with the fourth accommodation hole, in order to hold the fourth shaft is close to the one end of first connecting rod, the second guide rail set up in the second extends the hole, the second moving body with fourth shaft threaded connection, the periphery of second moving body is provided with protruding structure, protruding structure can be followed the second guide rail slides, second moving body and first connecting rod fixed connection or butt.

Preferably, the box assembly further includes a fourth bearing, an outer race of the fourth bearing is fixed to the second extension hole, and an inner race of the fourth bearing is fixed to the fourth shaft.

Preferably, the box body assembly further comprises a fifth shaft, one end of the fifth shaft is fixedly connected with the outer wall of the sleeve, and the other end of the fifth shaft is rotatably connected with the fourth shaft or is rotatably connected with a second driven bevel gear.

Preferably, the box body assembly further comprises a fifth bearing, one end of the fourth shaft, which is close to the second slave bevel gear, further comprises a fifth accommodating hole, an outer ring of the fifth bearing is arranged in the fifth accommodating hole, and an inner ring of the fifth bearing is arranged on the fifth shaft; or the second slave bevel gear further comprises a fifth accommodating hole, an outer ring of the fifth bearing is arranged in the fifth accommodating hole, and an inner ring of the fifth bearing is arranged on the fifth shaft.

Preferably, the box body assembly further comprises a first bone nail and a second bone nail, and the first bone nail and the second bone nail are used for enabling the first connecting rod and the second connecting rod to be fixed with the spine of the human body respectively.

The invention also provides a spinal column orthopedic system, which comprises the spinal column orthopedic non-invasive growth rod and an external permanent magnet source, wherein the external permanent magnet source acts on the spinal column orthopedic non-invasive growth rod to enable the first connecting rod and the second connecting rod to be far away or close to each other.

The spinal column orthopedic non-invasive growth rod provided by the invention overcomes the defect that the traditional growth rod needs repeated operations to realize distraction orthopedic treatment, avoids risks such as surgical infection and complications, reduces the trauma to the body and the mind of an infant patient, and reduces the treatment cost. Meanwhile, the spinal column orthopedic non-invasive growth rod can control the expansion or the shortening of the length of the growth rod in a non-invasive manner, can avoid the risk of unstable performance caused by the electromagnetic influence of an external non-active electromagnetic field, and has stability and reliability.

Drawings

The various aspects of the present invention will become more apparent to the reader after reading the detailed description of the invention with reference to the attached drawings. Wherein:

FIG. 1 is a schematic view of one embodiment of an orthopedic spinal atraumatic growth rod of the present invention;

FIG. 2 is a schematic structural view of a locked state cassette assembly of one embodiment of the spinal orthopedic atraumatic rod of the present invention;

FIG. 3 is a block diagram of a cassette assembly in an unlocked state of one embodiment of the spinal orthopedic atraumatic rod of the present invention;

FIG. 4 is an enlarged partial schematic view of the box assembly of one embodiment of the spinal orthopedic non-invasive growing bar of the present invention;

FIG. 5 is a schematic structural view of another embodiment of the spinal orthopedic atraumatic growth rod of the present invention;

fig. 6 is a schematic structural view of a box assembly of another embodiment of the spinal orthopedic atraumatic growth rod of the present invention.

Wherein the reference numerals are meant to:

11: a box body; 12: a first connecting rod; 13: a first bone pin; 14: a second connecting rod; 15: a second bone pin; 16: an extracorporeal permanent magnet source;

111: a main bevel gear; 112: a first slave bevel gear; 112': a second slave bevel gear; 113: a permanent magnet; 114: a first shaft; 115: a sleeve; 116: a second shaft; 116': a fourth axis; 117: a third axis; 117': a fifth axis; 118: a first mobile body; 118': a second movable body; 119: a first guide rail; 119': a second guide rail;

1110: an elastic member; 1111: a first bearing; 1112: a second bearing; 1112': a fourth bearing; 1113: a third bearing; 1113': a fifth bearing; 1114: a first extension portion; 1114': a second extension portion.

Detailed Description

In order to make the disclosure more complete and complete, reference is made to the appended drawings and the following detailed description of the invention. However, it should be understood by those skilled in the art that the examples provided below are not intended to limit the scope of the present invention. In addition, the drawings are only for illustrative purposes and are not drawn to scale.

The invention provides a spinal column orthopedic non-invasive growing rod, which comprises a box body assembly, a first connecting rod 12 and a second connecting rod 14, wherein one end of the first connecting rod 12 and one end of the second connecting rod 14 are positioned at two opposite sides of the box body assembly, at least one of the ends of the first connecting rod 12 and the second connecting rod 14 is movably connected with the box body assembly, the other ends of the first connecting rod 12 and the second connecting rod 14 are respectively fixed on a spinal column, the box body assembly comprises a box body 11, a permanent magnet 113, a driving part and a driven part, the box body 11 is provided with an inner cavity, the permanent magnet 113, the driving part and the driven part are arranged in the inner cavity, the permanent magnet 113 is used for driving the first connecting rod 12 and the second connecting rod 14 to be far away or close under the action of an in-vitro permanent magnet source 16 through the driving part and the driven part, to correct the spine.

Specific embodiments of various aspects of the present invention are described in further detail below with reference to the accompanying drawings. In the following embodiments, the driving member is a master bevel gear, and the driven member is a slave bevel gear, and the module and the profile angle of the master bevel gear and the slave bevel gear are equal, that is, the master bevel gear and the slave bevel gear can be engaged with each other. It will be appreciated by those skilled in the art that the drive member and the driven member of the present invention are not limited to bevel gears, and other means such as worm and gear arrangements, hypoid gear sets, etc. may be used.

Referring to fig. 1, a schematic view of an embodiment of the spinal orthopedic non-invasive growing rod of the present invention is shown, and referring to fig. 2, a schematic view of a box assembly shown in fig. 3 and a partially enlarged schematic view of the box assembly shown in fig. 4. In this embodiment, the spinal orthopedic atraumatic growth rod is shown as being one-way extended or shortened. That is, in this embodiment, one end of the first connecting rod 12 and one end of the second connecting rod 14 are located at two opposite sides of the box assembly, one of the ends of the first connecting rod 12 and the second connecting rod 14 is movably connected to the box assembly, the other ends of the first connecting rod 12 and the second connecting rod 14 are respectively fixed on the spine, the box assembly includes a box 11, a permanent magnet 113, a main bevel gear 111, and a first secondary bevel gear 112, the box 11 is provided with an inner cavity, the permanent magnet 113, the main bevel gear 111, and the first secondary bevel gear 112 are disposed in the inner cavity, and the permanent magnet 113 is used for driving the first connecting rod 12 and the second connecting rod 14 to move away from or approach to each other through the main bevel gear 111 and the first secondary bevel gear 112 under the action of the external permanent magnet source 16, so as to correct the spine.

Specifically, the first connecting rod 12 and the second connecting rod 14 are respectively connected to the left side and the right side of the box assembly, wherein the first connecting rod 12 is fixedly connected to the box 11, and the second connecting rod 14 is movably connected to the box 11, and it should be understood by those skilled in the art that "left side" and "right side" herein are merely exemplary to illustrate the relative positional relationship of the components, and should not be understood as any limitation to the present invention.

In this embodiment, the module and the tooth form angle of the main bevel gear 111 and the first slave bevel gear 112 are equal, that is, the main bevel gear 111 and the first slave bevel gear 112 can be engaged with each other. The permanent magnet 113 is used for driving the main bevel gear 111 and the first secondary bevel gear 112 to be converted from a separation state to an engagement state under the action of the external permanent magnet source 16. Further, the permanent magnet 113 is used for driving the main bevel gear 111 to drive the first slave bevel gear 112 in the engaged state to rotate under the action of the permanent magnet source 16, so as to drive the second connecting rod 14 to move relative to the box 11, so as to realize the moving away or approaching of the first connecting rod 12 and the second connecting rod 14. The primary bevel gear 111 and the first secondary bevel gear 112 are further configured such that when the extracorporeal permanent magnet source is removed, the primary bevel gear 111 and the first secondary bevel gear 112 are disengaged from each other.

In this embodiment, one end of the inner cavity is a first open end, one end of the second connecting rod 14 is movably connected with the first open end, and the first slave bevel gear 112 is rotatably disposed at the first open end of the inner cavity, so that the second connecting rod 14 is far away from or close to the first open end. The main bevel gear 111 is disposed at an angle to the first slave bevel gear 112, and the main bevel gear 111 is rotatably and movably provided to the inner cavity. Further, the rotation axis of the master bevel gear 111 is perpendicular to the rotation axis of the first slave bevel gear 112, and still further, the rotation axis of the first slave bevel gear 112 is parallel or collinear with the axis of the second connecting rod 14.

In this embodiment, the inner cavity of the housing 11 is provided with a groove along the rotation axis of the main bevel gear 111. The groove is used for accommodating the permanent magnet 113; the permanent magnet 113 is connected with the main bevel gear 111, can move up and down and rotate relative to the groove, and the magnetization direction of the permanent magnet 113 is consistent with the direction of the rotation axis of the main bevel gear 111. Further, the maximum outer diameter of the main bevel gear 111 is not smaller than the diameter of the groove. As shown in fig. 2, the rotation axis of the main bevel gear 111 extends in the up-down direction, and the groove may be provided at an upper portion of the inner cavity or at a lower portion of the inner cavity. The permanent magnet 113 is arranged at the upper end of the main bevel gear 111, and the permanent magnet 113 drives the main bevel gear 111 to move up and down or rotate relative to the groove. When the permanent magnet 113 is acted upon by the in vitro permanent magnet source 16, the main bevel gear 111 is driven to move downward, engaging with the first slave bevel gear 112. And under the action of the in vitro permanent magnet source 16, the permanent magnet 113 drives the main bevel gear 111 to drive the first slave bevel gear 112 in an engaged state to rotate.

In this embodiment, the box assembly further comprises a first shaft 114, a sleeve 115; the main bevel gear 111 is axially fixed with one end of the first shaft 114 and is connected with the first shaft in a circumferential rotating manner; the first shaft 114 is disposed opposite to the sleeve 115, i.e., the sleeve 115 is disposed in the inner cavity on the opposite side of the first shaft 114. The sleeve 115 is provided with a first receiving hole and an elastic member 1110, the elastic member 1110 is disposed in the first receiving hole, the other end of the first shaft 114 extends into the first receiving hole of the sleeve 115 and contacts the elastic member 1110, and the elastic member 1110 is used for providing an elastic force to separate the main bevel gear 111 from the first secondary bevel gear 112. In this embodiment, the elastic member 1110 is preferably a compression spring. So configured, the first shaft 114 is movable relative to the sleeve 115. When the external permanent magnet source 16 is removed, the compression spring drives the main bevel gear 111 to move upwards through the first shaft 114, so that the main bevel gear 111 and the first secondary bevel gear 112 are separated from each other.

In this embodiment, the case assembly preferably further includes a first bearing 1111, and the main bevel gear 111 is connected to one end of the first shaft 114 through the first bearing 1111. Specifically, the outer ring of the first bearing 1111 is fixed to the main bevel gear 111, and the inner ring of the first bearing 1111 is fixed to the first shaft 114, so that the main bevel gear 111 and the first shaft 114 are axially fixed and circumferentially and rotationally connected.

In this embodiment, the box body 11 further includes a first extending portion 1114, and the first extending portion 1114 is provided with a first extending hole and is communicated with the inner cavity. The housing assembly further includes a first reversing assembly disposed in the first elongated aperture for converting rotational movement of the first slave bevel gear 112 into movement of the second connecting rod 14. That is, the input end of the first reversing component is connected with the first driven bevel gear 112, and the output end of the first reversing component is connected with the second connecting rod 14. Further, the input end of the first reversing assembly receives the driving of the first slave bevel gear 112, and the output end of the first reversing assembly drives the second connecting rod 14 to move, for example, reciprocate.

As shown in fig. 2, in the present embodiment, the first reversing assembly includes a second shaft 116, a first guide rail 119, and a first moving body 118. The second shaft 116 is rotatably disposed in the first extending hole and extends to the second connecting rod 14, and preferably, the axes of the second shaft 116, the first connecting rod 12 and the second connecting rod 14 are parallel or collinear. One end of the second shaft 116 close to the first open end is fixedly connected with the first driven bevel gear 112, and one end of the second connecting rod 14 close to the second shaft 116 is provided with a second accommodating hole for accommodating one end of the second shaft 116 close to the second connecting rod 14. In this way, the first secondary bevel gear 112 is rotatably disposed at the first open end and can drive the second shaft 116 to rotate. The first guide rail 119 is disposed on the first extending hole, the first moving body 118 is in threaded connection with the second shaft 116, specifically, the first moving body 118 is an internal thread, correspondingly, an external thread matched with the internal thread is disposed at one end of the second shaft 116 far away from the first driven bevel gear 112, and preferably, the internal thread and the external thread are of a self-locking thread structure. The first moving body 118 is provided at its outer periphery with a protrusion structure which is slidable along the first guide rail 119, and the first moving body 118 is fixedly connected or abutted to the second connecting rod 14.

In this embodiment, the housing assembly further includes a second bearing 1112 for supporting the second shaft 116. The outer race of the second bearing 1112 is secured to the first elongated bore, preferably to an end of the first elongated bore adjacent the first open end, and the inner race of the second bearing 1112 is secured to the second shaft 116 to support the second shaft 116.

In this embodiment, in order to prevent the first slave bevel gear 112 from jumping when rotating, the box assembly further includes a third shaft 117, one end of the third shaft 117 is fixedly connected to the outer wall of the sleeve 115, and the other end of the third shaft 117 is rotatably connected to the second shaft 116 or rotatably connected to the first slave bevel gear 112.

In this embodiment, the housing assembly further comprises a third bearing 1113, and the third shaft 117 is connected to the second shaft 116 by the third bearing 1113. Preferably, the axis of the third shaft 117 is parallel or collinear with the axis of the second shaft 116. As shown in fig. 4, one end of the second shaft 116 near the first slave bevel gear 112 further includes a third receiving hole, in which an outer race of the third bearing 1113 is disposed, and an inner race of the third bearing 1113 is disposed on the third shaft 117. Obviously, the other end of the third shaft 117 may also be connected to the first slave bevel gear 112 through a third bearing 1113. At this time, a third receiving hole connected to the outer race of the third bearing 1113 is provided in the first slave bevel gear 112.

In this embodiment, the box assembly further comprises a first bone nail 13 and a second bone nail 15, and the first bone nail 13 and the second bone nail 15 are used for fixing the first connecting rod 12 and the second connecting rod 14 with the spine of the human body respectively so as to realize the position adjustment between the vertebrae on the spine of the human body.

Referring to the structural schematic diagram of the box assembly of an embodiment of the spinal orthopedic non-invasive growth rod shown in fig. 2 in the locked state, when there is no external permanent magnet source 16, the permanent magnet 113 is kept stationary in the groove by the elastic member 1110, the first shaft 114 and the main bevel gear 111 are also kept stationary, and the main bevel gear 111 and the first slave bevel gear 112 are in a separated state. At this time, even if the main bevel gear 111 rotates, the first secondary bevel gear 112 cannot be driven to move, and this state is a locking state of the spinal column orthopedic non-invasive growth rod, and the influence of an external non-active permanent magnet magnetic field can be effectively avoided.

Referring to the structural diagram of the box assembly of fig. 3 in the unlocked state of an embodiment of the spinal correction non-invasive growing rod, when the permanent magnet source 16 is close to the permanent magnet 113 outside the body, when the polarity of the side of the permanent magnet source 16 close to the permanent magnet 113 is the same as the polarity of the side of the permanent magnet 113 away from the upper end of the main bevel gear 111, the permanent magnet source 16 is continuously close to the permanent magnet 113, and since the two permanent magnets are in the same polarity and are in the same polarity, the permanent magnet 113 generates pressure on the main bevel gear 111 and the first shaft 114, thereby compressing the elastic member 1110, and the permanent magnet 113 moves downwards from the groove arranged on the inner wall of the box 11, and drives the main bevel gear 111 to slowly approach the first secondary bevel gear 112 until the main bevel gear 111 is completely engaged with the first secondary bevel gear 112, at which time the state of the spinal correction non-invasive growing rod is the unlocked state. In this state, the axis of the main bevel gear 111 is taken as the axis of the permanent magnet source 16, and the permanent magnet source 16 is slowly rotated in one direction, so that the permanent magnet 113 correspondingly rotates along with the external permanent magnet source 16, and the main bevel gear 111 drives the first auxiliary bevel gear 112 to rotate, and further drives the second shaft 116 to rotate, so that the first moving body 118 correspondingly linearly moves, and the second connecting rod 14 is driven to be far away from or close to the box body 11 and the first connecting rod 12. Specifically, when the permanent magnet source 16 is rotated clockwise, the second shaft 116 is rotated clockwise accordingly, so that the first moving body 118 moves linearly in a direction away from the housing 11 and the first connecting rod 12, and accordingly, the second connecting rod 14 is extended outwardly. When the permanent magnet source 16 is rotated counterclockwise, the second shaft 116 is rotated counterclockwise accordingly, so that the first mover 118 is linearly moved in a direction approaching the first connecting rod 12, and accordingly, the second connecting rod 14 is inwardly shortened. The extended or shortened length of the second connecting rod 14 can be calculated from the pitch of the screw thread at which the first movable body 118 is screw-coupled with the second shaft 116. Thus, the first and second connecting

rods

12, 14 are moved away from or closer together when the spinal orthopaedic atraumatic growth rod is in the unlocked state, increasing or decreasing the length of the spinal orthopaedic atraumatic growth rod, respectively; when the required length is reached, the permanent magnet source 16 is removed, and the spinal orthopedic non-invasive growth rod returns to the locking state, thereby avoiding the influence of external non-active electromagnetic field and having stability and reliability. Referring to fig. 5, another embodiment of the spinal orthopedic non-invasive growth rod is schematically illustrated, which provides a spinal orthopedic non-invasive growth rod capable of being lengthened or shortened in two directions, and the embodiment is an improvement of the above spinal orthopedic non-invasive growth rod capable of being lengthened or shortened in one direction, and the main improvement is that: both the first connecting rod 12 and the second connecting rod 14 are movable relative to the housing, preferably the first connecting rod 12 moves in a manner consistent with the second connecting rod 14. In this embodiment, the spinal orthopedic noninvasive growth rod comprises a box assembly, a first connecting rod 12 and a second connecting rod 14, wherein one end of the first connecting rod 12 and one end of the second connecting rod 14 are located at two opposite sides of the box assembly, and one ends of the first connecting rod 12 and the second connecting rod 14 are both used for being movably connected with the box assembly, the other ends of the first connecting rod 12 and the second connecting rod 14 are used for being respectively fixed on the spinal column, and the box assembly comprises a box 11, a permanent magnet 113, a driving piece and a driven piece. The box body 11 is provided with an inner cavity, the permanent magnet 113, the driving member and the driven member are arranged in the inner cavity, and the permanent magnet 113 is used for driving the first connecting rod 12 and the second connecting rod 14 to be simultaneously away from or close to each other under the action of the external permanent magnet source 16 through the driving member and the driven member so as to correct the spine.

Referring to fig. 6, a structural diagram of a box assembly of another embodiment of the spinal column orthopaedic non-invasive growth rod according to the invention is shown, in this embodiment, the driving member is a main bevel gear 111, and the driven members are a first secondary bevel gear 112 and a second secondary bevel gear 112'. The module and the profile angle of the main bevel gear 111 and the first and second slave bevel gears 112 and 112 'are equal, that is, the main bevel gear 111 can be meshed with the first and second slave bevel gears 112 and 112', respectively, and the permanent magnet 113 is used to drive the main bevel gear 111 and the first and second slave bevel gears 112 and 112 'to be changed from a disengaged state to an engaged state under the action of the external permanent magnet source 16, so as to drive the first and second slave bevel gears 112 and 112' to rotate to realize the distance or approach between the first and second connecting

rods

12 and 14.

In this embodiment, one end of the inner cavity is a first open end, one end of the second connecting rod 14 is movably connected with the first open end, and the first slave bevel gear 112 is rotatably disposed at the first open end of the inner cavity, so that the second connecting rod 14 is far away from or close to the first open end. The inner cavity further includes a second open end opposite to the first open end, one end of the first connecting rod 12 is movably connected to the second open end, and the second slave bevel gear 112' is rotatably disposed at the second open end of the inner cavity to allow the first connecting rod 12 to be far away from or close to the second open end. Preferably, the rotation axis of the first slave bevel gear 112 is parallel or collinear with the axis of the second connecting rod 14, and the rotation axis of the second slave bevel gear 112' is parallel or collinear with the axis of the first connecting rod 12. The main bevel gear 111 is arranged at an angle to the first and second slave bevel gears 112 and 112', and the main bevel gear 111 is rotatably and movably provided to the inner cavity.

In this embodiment, the inner cavity of the housing 11 is provided with a groove along the rotation axis of the main bevel gear 111. The groove is used for accommodating the permanent magnet 113; the permanent magnet 113 is connected with the main bevel gear 111, can move up and down and rotate relative to the groove, and the magnetization direction of the permanent magnet 113 is consistent with the direction of the rotation axis of the main bevel gear 111. Further, the maximum outer diameter of the main bevel gear 111 is not smaller than the diameter of the groove. The rotation axis of the main bevel gear 111 extends in the up-down direction, and the groove may be disposed at an upper portion of the inner cavity or at a lower portion of the inner cavity. The permanent magnet 113 is arranged at the upper end of the main bevel gear 111, and the permanent magnet 113 drives the main bevel gear 111 to move up and down or rotate relative to the groove. When the permanent magnet 113 is acted by the in vitro permanent magnet source 16, the main bevel gear 111 is driven to move downwards to be meshed with the first secondary bevel gear 112 and the second secondary bevel gear 112'. And under the action of the in vitro permanent magnet source 16, the permanent magnet 113 drives the main bevel gear 111 to drive the first slave bevel gear 112 and the second slave bevel gear 112' which are in an engaged state to rotate. In this embodiment, the box assembly further includes a first shaft 114, a sleeve 115; the main bevel gear 111 is axially fixed with one end of the first shaft 114 and is connected with the first shaft in a circumferential rotating manner; the first shaft 114 is disposed opposite the sleeve 115, and the sleeve 115 is disposed in the inner cavity on the opposite side of the first shaft 114. The sleeve 115 is provided with a first receiving hole and an elastic member 1110, the elastic member 1110 is disposed in the first receiving hole, the other end of the first shaft 114 extends into the first receiving hole of the sleeve 115 and contacts with the elastic member 1110, and the elastic member 1110 is used for providing an elastic force to separate the main bevel gear 111 from the first and second slave bevel gears 112 and 112'. In this embodiment, the elastic member 1110 is preferably a compression spring. So configured, the first shaft 114 is movable relative to the sleeve 115. When the external permanent magnet source 16 is removed, the compression spring drives the main bevel gear 111 to move upwards through the first shaft 114, so that the main bevel gear 111 and the first and second slave bevel gears 112 and 112' are separated from each other.

In this embodiment, the box assembly preferably further comprises a first bearing 1111, and the main bevel gear 111 is connected to one end of the first shaft 114 through the first bearing 1111; specifically, the outer ring of the first bearing 1111 is fixed to the main bevel gear 111, and the inner ring of the first bearing 1111 is fixed to the first shaft 114, so that the main bevel gear 111 and the first shaft 114 are axially fixed and circumferentially and rotationally connected.

In this embodiment, the box 11 further includes a first extending portion 1114, and the first extending portion 1114 is provided with a first extending hole and communicates with the inner cavity through a first opening end. The housing assembly further includes a first reversing assembly disposed in the first elongated aperture for converting rotational movement of the first slave bevel gear 112 into movement of the second connecting rod 14.

In this embodiment, the first reversing component includes a second shaft 116, a first guide rail 119 and a first moving body 118. The second shaft 116 is rotatably disposed in the first extending hole and extends to the second connecting rod 14, and preferably, the axes of the second shaft 116 and the second connecting rod 14 are parallel or collinear. One end of the second shaft 116 close to the first open end is fixedly connected with the first driven bevel gear 112, and one end of the second connecting rod 14 close to the second shaft 116 is provided with a second accommodating hole for accommodating one end of the second shaft 116 close to the second connecting rod 14. As such, the first secondary bevel gear 112 is rotatably disposed at the first open end and can drive the second shaft 116 to rotate. Preferably, the housing assembly further includes a second bearing 1112 for supporting the second shaft 116. Further, an outer ring of the second bearing 1112 is fixed to the first extending hole, and an inner ring of the second bearing 1112 is fixed to the second shaft 116.

In this embodiment, the first guide rail 119 is disposed in the first extending hole, the first moving body 118 is screwed with the second shaft 116, and a protruding structure is disposed on an outer circumference of the first moving body 118 and is slidable along the first guide rail 119. The first moving body 118 is fixedly connected to or abutted against the second connecting rod 14.

In this embodiment, the box body 11 further includes a second extending portion 1114 ', and the second extending portion 1114' is provided with a second extending hole and is communicated with the inner cavity through a second opening end. The housing assembly further includes a second reversing assembly disposed in the second extension hole for converting the rotational motion of the second slave bevel gear 112' into the movement of the first connecting rod 12. The second reversing assembly includes a fourth shaft 116 ', a second guide rail 119 ' and a second moving body 118 '. The fourth shaft 116 'is rotatably disposed in the second extending hole and extends to the first connecting rod 12, and preferably, the axes of the fourth shaft 116' and the first connecting rod 12 are parallel or collinear. The end of the fourth shaft 116 'near the second open end is fixedly connected to the second bevel gear 112', and the end of the first connecting rod 12 near the fourth shaft 116 'is provided with a fourth receiving hole for receiving the end of the fourth shaft 116' near the first connecting rod 12. In this way, the second secondary bevel gear 112 'is rotatably disposed at the second open end and can drive the fourth shaft 116' to rotate. Preferably, the box assembly further comprises a fourth bearing 1112 'for supporting the fourth shaft 116'. Further, an outer ring of the fourth bearing 1112 ' is fixed to the second extension hole, and an inner ring of the fourth bearing 1112 ' is fixed to the fourth shaft 116 '.

In this embodiment, the second guide rail 119 ' is disposed on the second extension hole, and the second moving body 118 ' is screw-coupled with the fourth shaft 116 '. For example, the second moving body 118 ' is an internal thread, and correspondingly, an end of the fourth shaft 116 ' far away from the second slave bevel gear 112 ' is provided with an external thread matching with the internal thread, and preferably, the internal thread and the external thread are of a self-locking thread structure. The outer circumference of the second moving body 118 'is provided with a protrusion structure that is slidable along the second guide rail 119'. Furthermore, the second moving body 118' is fixedly connected or abutted with the first connecting rod 12. Further, the rotation direction of the external thread on the second shaft 116 is opposite to that of the external thread of the fourth shaft 116 ', so that the first connecting rod 12 and the second connecting rod 14 can simultaneously approach or depart from the box assembly on the premise that the first slave bevel gear 112 and the second slave bevel gear 112' rotate oppositely.

In this embodiment, the box assembly further includes a third shaft 117, one end of the third shaft 117 is fixedly connected to the outer wall of the sleeve 119, and the other end is rotatably connected to the second shaft 116. Further, the box assembly further includes a third bearing 1113, and the third shaft 117 is connected to the second shaft 116 through the third bearing 1113. Specifically, one end of the second shaft 116 near the first slave bevel gear 112 further includes a third receiving hole in which the outer race of the third bearing 1113 is disposed, and the inner race of the third bearing 1113 is disposed on the third shaft 117. Similarly, the box assembly further comprises a fifth shaft 117 ', one end of the fifth shaft 117 ' is fixedly connected with the outer wall of the sleeve 115, and the other end is rotatably connected with the fourth shaft 116 '. Preferably, the axis of the fifth shaft 117 'is parallel or collinear with the axis of the fourth shaft 116'. Specifically, the box assembly further includes a fifth bearing 1113 ', and one end of the fourth shaft 116' near the second slave bevel gear 112 'further includes a fifth receiving hole, in which an outer race of the fifth bearing 1113' is disposed, and an inner race of the fifth bearing 1113 'is disposed on the fifth shaft 117'. Obviously, the other end of the fifth shaft 117 ' may also be connected to the second slave bevel gear 112 ' through a fifth bearing 1113 '. At this time, a fifth receiving hole connected to the outer race of the fifth bearing 1113 'is provided in the second slave bevel gear 112'. In this embodiment, the box assembly further comprises a first bone nail 13 and a second bone nail 15, and the first bone nail 13 and the second bone nail 15 are used for fixing the first connecting rod 12 and the second connecting rod 14 with the spine of the human body respectively so as to realize the position adjustment between the vertebrae on the spine of the human body. In this embodiment, when the permanent magnet source 16 is close to the permanent magnet 113 outside the body, when the polarity of the side of the permanent magnet source 16 close to the permanent magnet 113 is the same as the polarity of the side of the permanent magnet 113 far from the upper end of the main bevel gear 111, the permanent magnet source 16 is kept close to the permanent magnet 113, and since the two permanent magnets have the same polarity and repel each other, the permanent magnet 113 is driven to generate pressure on the main bevel gear 111 and the first shaft 114, so as to compress the elastic member 1110, the permanent magnet 113 will move downwards from the groove provided on the inner wall of the box 11, and the main bevel gear 111 is driven to slowly approach the first secondary bevel gear 112 and the second secondary bevel gear 112 ', until the main bevel gear 111 is completely engaged with the first secondary bevel gear 112 and the second secondary bevel gear 112', and then the state of the spinal column orthopaedic non-invasive growing rod is an unlocked state. In this state, the axis of the main bevel gear 111 is taken as the axis of the permanent magnet source 16, and the permanent magnet source 16 is slowly rotated in one direction, and the permanent magnet 113 correspondingly rotates along with the external permanent magnet source 16, so that the main bevel gear 111 is driven to drive the first slave bevel gear 112 and the second slave bevel gear 112 ' to simultaneously rotate, and further drive the second shaft 116 and the fourth shaft 116 ' to simultaneously rotate, so that the first moving body 118 and the second moving body 118 ' simultaneously generate corresponding linear motions, and the first connecting rod 12 and the second connecting rod 14 are driven to simultaneously move away from or approach the box 11. For example, in the present embodiment, when the permanent magnet source 16 is rotated clockwise, the main bevel gear 111 drives the first and second secondary bevel gears 112 and 112 'to rotate clockwise and counterclockwise respectively, but because the thread directions of the second and fourth shafts 116 and 116' are opposite, the second and fourth shafts 116 and 116 'rotate clockwise simultaneously, so that the first and second moving bodies 118 and 118' move linearly in a direction away from each other simultaneously, and accordingly, the first and second connecting

rods

12 and 14 extend outward simultaneously; also, when the permanent magnet source 16 is rotated counterclockwise, the second shaft 116 and the fourth shaft 116 'are simultaneously rotated counterclockwise, respectively, so that the first moving body 118 and the second moving body 118' are simultaneously linearly moved in a direction approaching the housing 11, and accordingly, the first connection rod 12 and the second connection rod 14 are simultaneously shortened inward. The extended or shortened lengths of the first and

second connection rods

12 and 14 may be calculated from the thread pitches of the threaded connection of the second and fourth shafts 118 'and 116', and the first and

second shafts

118 and 116, respectively. Thus, the first and second connecting

rods

12, 14 move away from or towards each other when the spinal orthopaedic atraumatic growth rod is in the unlocked state, increasing or decreasing the length of the spinal orthopaedic atraumatic growth rod. When the required length is reached, the permanent magnet source 16 is removed, and the spinal orthopedic non-invasive growth rod returns to the locking state, thereby avoiding the influence of an external non-active electromagnetic field and having stability and reliability.

The spinal column orthopedic non-invasive growth rod provided by the embodiment of the invention overcomes the defect that the traditional growth rod needs repeated operations to realize distraction orthopedic treatment, avoids risks such as surgical infection and complications, reduces the trauma to the body and the mind of an infant patient, and reduces the treatment cost. Meanwhile, the spinal orthopedic non-invasive growth rod provided by the embodiment of the invention can not only control the growth or the shortening of the length of the growth rod in a non-invasive manner, but also avoid the risk of unstable performance caused by the electromagnetic influence of an external non-active electromagnetic field, and has stability and reliability.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the invention and are not intended to limit the embodiments of the present invention, and that various other changes and modifications may be made on the basis of the above-described descriptions by those skilled in the art. All documents mentioned in this application are incorporated by reference into this application as if each were individually incorporated by reference.

Claims

1. The spinal column orthopedic non-invasive growing rod is characterized by comprising a box body assembly, a first connecting rod and a second connecting rod, wherein one end of the first connecting rod and one end of the second connecting rod are positioned on two opposite sides of the box body assembly, at least one of the ends of the first connecting rod and the second connecting rod is movably connected with the box body assembly, the other ends of the first connecting rod and the second connecting rod are respectively fixed on a spinal column, the box body assembly comprises a box body, a permanent magnet, a driving piece, a driven piece and a first reversing assembly, an inner cavity is formed in the box body, and the permanent magnet, the driving piece and the driven piece are arranged in the inner cavity; the driving piece comprises a main bevel gear, the driven piece comprises a first secondary bevel gear, the main bevel gear and the first secondary bevel gear can be meshed with each other, the permanent magnet is used for driving the main bevel gear and the first secondary bevel gear to be changed from a separation state to a meshing state under the action of an in vitro permanent magnet source so as to drive the first secondary bevel gear in the meshing state to rotate, and the first secondary bevel gear drives the second connecting rod to move through the first reversing assembly so as to enable the first connecting rod and the second connecting rod to be far away from or close to each other to correct the spine.

2. The spinal orthopedic non-invasive growing rod according to claim 1, wherein one end of the inner cavity is a first open end, one end of the second connecting rod is movably connected with the first open end, the first slave bevel gear is rotatably disposed at the first open end of the inner cavity so that the second connecting rod is far away from or close to the first open end, the main bevel gear is arranged at an angle to the first slave bevel gear, and the main bevel gear is rotatably and movably disposed at the inner cavity.

3. A spinal orthopaedic non-invasive growth rod according to claim 2, wherein the internal cavity is provided with a recess in the direction of the primary bevel gear rotation axis, the recess being for receiving the permanent magnet; the permanent magnet is connected with the main bevel gear and can move up and down and rotate relative to the groove, and the magnetization direction of the permanent magnet is consistent with the direction of the rotation axis of the main bevel gear.

4. The spinal orthopedic atraumatic growth rod of claim 3, wherein the case assembly further comprises a first shaft, a sleeve; the main bevel gear is axially fixed with one end of the first shaft and is in circumferential rotation connection with the first shaft; the sleeve is arranged in an inner cavity on one side opposite to the first shaft, the sleeve is provided with a first accommodating hole and an elastic piece, the elastic piece is arranged in the first accommodating hole, the other end of the first shaft extends into the first accommodating hole of the sleeve and is in contact with the elastic piece, and the elastic piece is used for providing elastic force to enable the main bevel gear and the first slave bevel gear to be in a separation state.

5. The spinal orthopedic non-invasive growth bar according to claim 4, wherein the housing assembly further comprises a first bearing having an outer race fixed to the main bevel gear and an inner race fixed to the first shaft to provide an axially fixed, circumferential rotational connection between the main bevel gear and the first shaft.

6. The spinal orthopedic atraumatic growth rod of claim 4, wherein the case further comprises a first extension provided with a first extension aperture and communicating with the internal cavity through the first open end; the first reversing component is arranged in the first extending hole and used for converting the rotary motion of the first slave bevel gear into the movement of the second connecting rod.

7. The spinal column orthopaedic non-invasive growth rod according to claim 6, wherein the first reversing assembly includes a second shaft rotatably disposed in the first extending hole and extending to the second connecting rod, one end of the second shaft near the first open end is fixedly connected to the first bevel gear, one end of the second connecting rod near the second shaft is provided with a second receiving hole to receive one end of the second shaft near the second connecting rod, the first guide rail is disposed on the first extending hole, the first moving body is in threaded connection with the second shaft, the outer periphery of the first moving body is provided with a protruding structure, the protruding structure can slide along the first guide rail, and the first moving body is fixedly connected or abutted to the second connecting rod.

8. The spinal orthopedic atraumatic growth rod of claim 7, wherein the cage assembly further includes a second bearing having an outer race secured to the first elongated bore and an inner race secured to the second shaft to support the second shaft.

9. The spinal orthopedic non-invasive growth rod according to claim 7, wherein the box assembly further comprises a third shaft, one end of the third shaft is fixedly connected with the outer wall of the sleeve, and the other end of the third shaft is rotatably connected with the second shaft or the first slave bevel gear.

10. The spinal orthopedic atraumatic growth rod of claim 9, wherein the case assembly further comprises a third bearing, an end of the second shaft proximate the first slave bevel gear further comprising a third receiving hole, an outer race of the third bearing disposed in the third receiving hole, an inner race of the third bearing disposed on the third shaft; or, the first slave bevel gear further includes a third accommodation hole, an outer race of the third bearing is disposed in the third accommodation hole, and an inner race of the third bearing is disposed on the third shaft.

11. The spinal orthopedic atraumatic growth rod of claim 4, wherein the follower comprises a second slave bevel gear intermeshable with the master bevel gear, the internal cavity further comprising a second open end disposed opposite the first open end, the first connecting rod having one end movably coupled to the second open end, the second slave bevel gear rotatably disposed at the second open end of the internal cavity to move the first connecting rod away from or toward the second open end.

12. The spinal orthopedic non-invasive growth rod according to claim 11, wherein the case further comprises a second extension provided with a second extension hole and communicating with the internal cavity through the second open end; the box body assembly further comprises a second reversing assembly, the second reversing assembly is arranged in the second extending hole and used for converting the rotary motion of the second secondary bevel gear into the movement of the first connecting rod.

13. The spinal orthopedic atraumatic growth rod of claim 12, wherein the second reversing component includes a fourth shaft rotatably disposed within the second elongated bore and extending to the first connector rod, an end of the fourth shaft proximate the second open end fixedly coupled to the second slave bevel gear, an end of the first connector rod proximate the fourth shaft having a fourth receiving bore for receiving an end of the fourth shaft proximate the first connector rod, the second guide track disposed within the second elongated bore, the second body threadably coupled to the fourth shaft, the second body having a raised structure disposed about an outer periphery thereof, the raised structure being slidable along the second guide track, the second body being fixedly coupled to or abutting the first connector rod.

14. The spinal orthopedic atraumatic growth rod of claim 13, wherein the cage assembly further comprises a fourth bearing having an outer race secured to the second elongated bore and an inner race secured to the fourth shaft.

15. The spinal orthopedic atraumatic growth rod of claim 13, wherein the cage assembly further comprises a fifth shaft having one end fixedly attached to the outer wall of the sleeve and another end rotatably attached to the fourth shaft or to the second slave bevel gear.

16. The spinal orthopedic atraumatic growth rod of claim 15, wherein the cage assembly further comprises a fifth bearing, an end of the fourth shaft proximate the second slave bevel gear further comprising a fifth receiving hole, an outer race of the fifth bearing disposed in the fifth receiving hole, an inner race of the fifth bearing disposed on the fifth shaft; or the second slave bevel gear further comprises a fifth accommodating hole, an outer ring of the fifth bearing is arranged in the fifth accommodating hole, and an inner ring of the fifth bearing is arranged on the fifth shaft.

17. The spinal orthopedic atraumatic growth rod of claim 1, wherein the cage assembly further comprises first and second bone screws for securing the first and second connector rods, respectively, to a human spinal column.

18. An orthopaedic spinal system comprising an orthopaedic spinal noninvasive growth rod of any of claims 1-17 and an extracorporeal permanent magnet source for acting on the orthopaedic spinal noninvasive growth rod to move the first connection rod away from or toward the second connection rod.