Growth valve assembly

Abstract

The application provides a growth valve assembly, which comprises a fixed sleeve and two rod members; each rod member comprises a connecting rod and a matching rod, one end of the matching rod is connected with the connecting rod, and the other end of the matching rod is provided with a rod part limiting sleeve; the matching rod has a mounting surface and two parallel arranged bearing side surfaces; each bearing side surface is provided with a boss, and the support surfaces of the two bosses and the mounting surface of the matching rod constitute a stretching surface; the stretching surface is provided with a tooth part, the tooth part comprises a plurality of ratchets, and all the ratchets are sequentially arranged along the length direction of the stretching surface; the rod part limiting sleeve comprises two limiting stop pieces; and the fixed sleeve comprises a sleeve body pressing plate and two parallel arranged positioning plates. The growth valve assembly can exist in the patient's body for a long time, can reduce the operation frequency of the patient, and can reduce the pain of the patient during operation.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a growing valve assembly. BACKGROUND

[0002] For children with congenital scoliosis, the curvature of the spine needs to be controlled before the bone growth matures, otherwise the degree of their lateral curvature may become very serious, affecting the development of the thorax and even important internal organs, and even leading to death. For patients with mild degree and good spine flexibility, conservative treatment methods such as wearing a brace can be implemented, but for a large number of patients, surgical intervention is needed to reduce or slow down the progression of the lateral curvature angle, so that the lateral curvature angle of the patient's spine is controlled within a certain range before development is completed.

[0003] The commonly used surgical treatment method at present is to use a traditional growing valve. After the growing valve is installed to the vertebral body on the concave side of the lateral curvature, the upper and lower connecting rods can be stretched along the longitudinal direction to straighten the curved segment of the spine. After the first operation, due to the growth and development of the patient, the spine becomes longer, and every six months or so, a reoperation is needed to loosen the fixed screw plug on one side, so that the upper connecting rod or the lower connecting rod is stretched along the longitudinal direction, and then locked with the screw plug. Most patients who undergo such surgery are less than fourteen years old, so they need to undergo up to ten times of stretching surgery. Such high-frequency surgery not only brings great pain to the patient, but also brings heavy economic burden to the patient's family.

[0004] How to design a growing valve assembly that can be automatically lengthened without the need for multiple surgeries is a problem that needs to be solved by those skilled in the art. SUMMARY

[0005] In view of the above-mentioned shortcomings of the prior art, the technical problem to be solved by the present application is to provide a growing valve assembly that can be automatically lengthened without the need for multiple surgeries.

[0006] To achieve the above-mentioned and other related purposes, the present application provides a growing valve assembly, comprising: a fixed sleeve and two rod members.

[0007] Each of the rods comprises a connecting rod and a matching rod, one end of the matching rod is connected with the connecting rod, the other end of the matching rod is provided with a rod part limiting sleeve, the axial direction of the connecting rod is the same as the axial direction of the matching rod, and the axial direction of the matching rod is the same as the length direction of the matching rod; the matching rod has a mounting face and two parallel arranged receiving side faces, each of the receiving side faces is perpendicular to the mounting face; each of the receiving side faces is provided with a boss, the length of the boss is smaller than the length of the receiving side face, the boss has a support platform face, the support platform face is coplanar with the mounting face, the side face of each of the bosses away from the matching rod is a platform receiving face, the platform receiving face is perpendicular to the support platform face, and the support platform faces of the two bosses and the mounting face of the matching rod form a stretching face; the stretching face is provided with a tooth part, the tooth part comprises a plurality of ratchets, and all the ratchets are sequentially arranged along the length direction of the stretching face.

[0008] The rod part limiting sleeve comprises two oppositely arranged limiting stop pieces, each of the limiting stop pieces is connected with the receiving side face, each of the limiting stop pieces has a stop piece inner side face, the stop piece inner side faces of the two limiting stop pieces are oppositely arranged, and the stop piece inner side face of each of the limiting stop pieces is perpendicular to the mounting face; the stop piece inner side faces of the two limiting stop pieces and the mounting face surround a bayonet, the stop piece inner side face of each of the limiting stop pieces is provided with a limiting protruding part, and the limiting protruding parts of the two limiting stop pieces are oppositely arranged; each of the receiving side faces, the boss connected with the receiving side face and the connecting rod surround a matching groove.

[0009] The sum of the height value of the platform receiving face and the height value of the tooth part is a platform tooth height value, the height value between the limiting protruding part and the mounting face is a protruding height value, and the sum of the platform tooth height value and the height value of the tooth part is smaller than the protruding height value.

[0010] The fixing sleeve comprises a sleeve body pressing plate and two parallel arranged positioning plates, the two sides of the sleeve body pressing plate are connected with the two positioning plates respectively; the positioning plates are provided with plate body inner side faces, and the plate body inner side faces of the two positioning plates are oppositely arranged; each of the plate body inner side faces is provided with a clamping protruding piece away from the sleeve body pressing plate;

[0011] Two limiting stoppers of the rod part limiting sleeve on each of the matching rods are respectively inserted into two matching grooves on the other matching rod, the two matching rods form a nested structure, when the tooth parts of the two matching rods are engaged with each other, the fixing sleeve covers the two matching rods, the sleeve body pressing plate presses one of the matching rods, and each positioning plate presses two protrusions on the same side, and two clamping protrusions respectively abut against two protrusions on the other matching rod; the connecting rod driving the two rod parts moves, so that the rod part limiting sleeves of the two rod parts move relatively along the length direction of the rod part, and the clamping sleeves of the rod part limiting sleeves of each rod part are sleeved on the two protrusions of the other rod part.

[0012] Preferably, the inner side of the positioning plate is provided with a plate hole.

[0013] Preferably, the clamping protrusion has a clamping surface, and the included angle between the clamping surface and the inner side of the plate body is greater than 90 degrees.

[0014] As described above, the growth valve assembly has the following beneficial effects:

[0015] Before use, the two matching rods form a nested structure, and when the tooth parts of the two matching rods are engaged with each other, the fixing sleeve covers the two matching rods; the connecting rod driving the two rod parts moves along the length direction, so that the rod part limiting sleeves of the two rod parts move relatively along the length direction of the rod part, and the clamping sleeves of the rod part limiting sleeves of each rod part are sleeved on the two protrusions of the other rod part; when in use, one of the rod parts of the first growth valve assembly is installed in the screw groove of the first pedicle screw, the first pedicle screw is installed on the first vertebral body without lateral bending, the other rod part of the first growth valve assembly is installed in the first screw groove of the first double-head pedicle screw, and the first double-head pedicle screw is installed on the vertebral body with the largest lateral bending; one of the rod parts of the second growth valve assembly is installed in the second screw groove of the first double-head pedicle screw, and the other rod part of the second growth valve assembly is installed in the screw groove of the second pedicle screw, the second pedicle screw is installed on the second vertebral body without lateral bending, and the vertebral body with the largest lateral bending is between the first vertebral body without lateral bending and the second vertebral body without lateral bending; then the fixing sleeve is removed from each growth valve assembly, and the fixing sleeve is separated from the two rod parts, so that as the patient's height increases, the connecting rod of the two rod parts of each growth valve assembly continues to move along the length direction, so that the two rod part limiting sleeves of each growth valve assembly move relatively, that is, the growth valve assembly can automatically lengthen as the patient's height increases; the growth valve assembly can exist in the patient's body for a long time, can reduce the number of operations of the patient, and can reduce the pain of the patient during the operation. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 A perspective view showing the growth valve assembly of the present embodiment in an initial state.

[0017] Figure 2 A side view showing the growth valve assembly of the present embodiment in an initial state.

[0018] Figure 3 A cross-sectional view showing the A-A direction of Figure 2 .

[0019] Figure 4 A side view showing the growth valve assembly of the present embodiment in an initial state without the fixing sleeve.

[0020] Figure 5 A cross-sectional view showing the B-B direction of Figure 4 .

[0021] Figure 6 An exploded view showing the growth valve assembly of the present embodiment.

[0022] Figure 7 An enlarged view showing the C of Figure 6 .

[0023] Figure 8 A view showing one end of the rod of the growth valve assembly of the present embodiment with a rod position limiting sleeve.

[0024] Figure 9 A perspective view showing the rod of the growth valve assembly of the present embodiment.

[0025] Figure 10 A side view showing the rod of the growth valve assembly of the present embodiment.

[0026] Figure 11 An enlarged view showing the D of Figure 10 .

[0027] Figure 12 A view showing the end face of the fixing sleeve of the growth valve assembly of the present embodiment.

[0028] Figure 13 A view showing the side face of the fixing sleeve of the growth valve assembly of the present embodiment.

[0029] Figure 14 A perspective view showing the growth valve assembly of the present embodiment in an initial state without the fixing sleeve.

[0030] Figure 15 A perspective view showing the growth valve assembly of the present embodiment in a limit state without the fixing sleeve.

[0031] Figure 16 The structure diagram showing the growth valve assembly of the present embodiment installed on the vertebral body.

[0032] BRIEF DESCRIPTION OF DRAWINGS

[0033] 100 fixed sleeve

[0034] 110 sleeve pressing plate

[0035] 120 positioning plate

[0036] 121 plate inner side

[0037] 122 plate through hole

[0038] 130 latching protruding piece

[0039] 131 latching surface

[0040] 200 rod piece

[0041] 210 connecting rod

[0042] 211 rod body

[0043] 212 transition connecting portion

[0044] 220 matching rod

[0045] 221 installation surface

[0046] 222 receiving side surface

[0047] 230 rod portion limiting sleeve

[0048] 231 limiting stop piece

[0049] 2311 stop piece inner side surface

[0050] 232 limiting protruding portion

[0051] 240 boss

[0052] 241 support platform surface

[0053] 242 platform receiving surface

[0054] 250 tooth portion

[0055] 251 ratchet tooth

[0056] 260 matching groove

[0057] 310 first pedicle screw

[0058] 320 second pedicle screw

[0059] 330 third pedicle screw

[0060] 340 fourth pedicle screw

[0061] 410 first vertebra body

[0062] 420 second vertebra body

[0063] 510 first double-end pedicle screw

[0064] 520 second double-end pedicle screw

[0065] H1 height of coping surface of abutment

[0066] H2 height of tooth

[0067] H3 height of protrusion

[0068] L1 length of tooth

[0069] L2 length of fixing sleeve

[0070] L3 length of boss

[0071] L4 length of abutment side surface DETAILED DESCRIPTION

[0072] The embodiments of the present application will be described in detail by the following specific examples, and other advantages and effects of the present application can be easily understood by those skilled in the art from the contents disclosed in the specification.

[0073] Please refer to the drawings. It should be understood that the structures, proportions, sizes, etc. shown in the drawings attached to the specification are only used to cooperate with the contents disclosed in the specification for those skilled in the art to understand and read, and are not used to limit the defined conditions that the present application can be implemented, so they do not have technical significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects that the present application can produce and the purposes that the present application can achieve, should still fall within the scope of the technical content disclosed by the present application. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the specification are only for the convenience of clear description, and are not used to limit the scope of the present application, and the change or adjustment of the relative relationship, without substantially changing the technical content, is also considered as the scope of the present application.

[0074] As shown in Figures 1 to 16 , the growth valve assembly of the present embodiment comprises a fixing sleeve 100 and two rod members 200;

[0075] Each rod piece 200 comprises a connecting rod 210 and a matching rod 220, one end of the matching rod 220 is connected with the connecting rod 210, the other end of the matching rod 220 is provided with a rod part limiting sleeve 230, the axial direction of the connecting rod 210 is the same as the axial direction of the matching rod 220, and the axial direction of the matching rod 220 is the same as the length direction of the matching rod 220; the matching rod 220 has a mounting surface 221 and two parallel arranged receiving side surfaces 222, each receiving side surface 222 is perpendicular to the mounting surface 221; each receiving side surface 222 is provided with a boss 240, the length L3 of the boss 240 is less than the length L4 of the receiving side surface 222, the boss 240 has a support platform 241, the support platform 241 is coplanar with the mounting surface 221, the side of each boss 240 away from the matching rod 220 is a platform receiving surface 242, the platform receiving surface 242 is perpendicular to the support platform 241, and the support platforms 241 of the two bosses 240 and the mounting surface 221 of the matching rod 220 form a stretching surface; the stretching surface is provided with a tooth part 250, the tooth part 250 comprises a plurality of ratchets 251, and all the ratchets 251 are sequentially arranged along the length direction of the stretching surface;

[0076] The rod part limiting sleeve 230 comprises two oppositely arranged limiting stop pieces 231, each limiting stop piece 231 is connected with the receiving side surface 222, each limiting stop piece 231 has a stop piece inner side surface 2311, the stop piece inner side surfaces 2311 of the two limiting stop pieces 231 are oppositely arranged, and the stop piece inner side surface 2311 of each limiting stop piece 231 is perpendicular to the mounting surface 221; the stop piece inner side surfaces 2311 of the two limiting stop pieces 231 and the mounting surface 221 form a bayonet, the stop piece inner side surface 2311 of each limiting stop piece 231 is provided with a limiting protruding part 232, and the limiting protruding parts 232 of the two limiting stop pieces 231 are oppositely arranged; each receiving side surface 222, the boss 240 connected with the receiving side surface 222 and the connecting rod 210 form a matching groove 260;

[0077] The sum of the value of the height H1 of the platform receiving surface 242 and the value of the height H2 of the tooth part 250 is the value of the platform tooth height, the platform tooth height is H1 plus H2, the value of the height between the limiting protruding part 232 and the mounting surface 221 is the value of the protruding height H3, and the sum of the value of the platform tooth height and the value of the height H2 of the tooth part 250 is less than the value of the protruding height H3;

[0078] The fixing sleeve 100 comprises a sleeve body pressing plate 110 and two parallel arranged positioning plates 120, the two sides of the sleeve body pressing plate 110 are respectively connected with the two positioning plates 120; the positioning plate 120 is provided with a plate body inner side surface 121, and the plate body inner side surfaces 121 of the two positioning plates 120 are oppositely arranged; one side of each plate body inner side surface 121 away from the sleeve body pressing plate 110 is provided with a clamping protruding piece 130;

[0079] The two limiting stoppers 231 of the rod part limiting sleeve 230 on each fitting rod 220 are respectively inserted into the two fitting grooves 260 on the other fitting rod 220, the two fitting rods 220 form a nested structure, when the tooth parts 250 of the two fitting rods 220 are engaged with each other, the fixing sleeve 100 covers the two fitting rods 220, the sleeve body pressing plate 110 presses one of the fitting rods 220, each positioning plate 120 presses the two bosses 240 on the same side, and the two clamping protrusions 130 respectively abut against the two bosses 240 on the other fitting rod 220; the connecting rod 210 drives the two rod parts 200 to move, so that the two rod part limiting sleeves 230 move relatively along the length direction of the rod part 200, and the clamping sleeve of the rod part limiting sleeve 230 of each rod part 200 is sleeved on the two bosses 240 of the other rod part 200.

[0080] Before use, the two fitting rods 220 form a nested structure, when the tooth parts 250 of the two fitting rods 220 are engaged with each other, the fixing sleeve 100 covers the two fitting rods 220; the connecting rod 210 drives the two rod parts 200 to move in the length direction in opposite directions, the two rod part limiting sleeves 230 move relatively, and the clamping sleeve of the rod part limiting sleeve 230 of each rod part 200 is sleeved on the two bosses 240 of the other rod part 200; when used, one of the rod parts 200 of the first growth valve assembly is installed in the screw groove of the first pedicle screw 310, the first pedicle screw 310 is installed on the first vertebral body 410 without lateral bending, the other rod part 200 of the first growth valve assembly is installed in the first screw groove of the first double-head pedicle screw 510, and the first double-head pedicle screw 510 is installed on the vertebral body 610 with the largest lateral bending; one of the rod parts 200 of the second growth valve assembly is installed in the second screw groove of the first double-head pedicle screw 510, the other rod part 200 of the second growth valve assembly is installed in the screw groove of the second pedicle screw 320, and the second pedicle screw 320 is installed on the second vertebral body 420 without lateral bending; the largest lateral bending vertebral body 610 is between the first vertebral body 410 without lateral bending and the second vertebral body 420 without lateral bending; then the fixing sleeve 100 is removed from each growth valve assembly, and the fixing sleeve 100 is separated from the two rod parts 200, so that, as the patient's height increases, the connecting rod 210 of the two rod parts 200 of each growth valve assembly continues to move in the length direction, so that the two rod part limiting sleeves 230 of each growth valve assembly move relatively, that is, the growth valve assembly can automatically lengthen as the patient's height increases, until a suitable opportunity for the final fusion surgery is found; the growth valve assembly can exist in the patient's body for a long time, can reduce the number of surgeries of the patient, and can reduce the pain of the patient during surgery. The growth valve assembly is used for the surgery of congenital scoliosis of children.

[0081] When the socket of the rod part limiting sleeve 230 of each rod member 200 is sleeved on the two bosses 240 of the other rod member 200, the bosses 240 block the radial movement of the limiting protrusions 232 along the rod member 200.

[0082] In the growth valve assembly of the embodiment, the length L1 of the tooth part 250 is greater than the length L2 of the fixing sleeve 100. This structure enables the connecting rod 210 driving the two rod members 200 to move along the length direction before the growth valve assembly is used, so that the two rod part limiting sleeves 230 move relatively, and after the socket of the rod part limiting sleeve 230 of each rod member 200 is sleeved on the two bosses 240 of the other rod member 200, the fixing sleeve 100 is located between the two rod part limiting sleeves 230.

[0083] The growth valve assembly of the embodiment comprises the fixing sleeve 100 and two identical rod members 200, which are single in parts and are convenient for production and assembly; the growth valve assembly is assembled by using the "buckling type" mounting and connecting mode, which greatly reduces the assembly time and only needs to align the sockets of the two rod members 200 with the matching grooves 260.

[0084] After the socket of each rod member 200 is matched with the corresponding matching groove 260, the tooth part 250 of each matching rod 220 is engaged with each other, so that the two rod members 200 can only move in the direction away from the matching groove 260; the matching of the rod member 200 with the matching groove 260 is a "buckling type" mounting and connecting mode, which greatly reduces the assembly time and only needs to align the two rod members 200 with the matching groove 260.

[0085] When the fixing sleeve 100 is separated from the two rod members 200, the connecting rod 210 driving the two rod members 200 continues to move along the length direction, and the two rod part limiting sleeves 230 continue to move relatively. Since the socket of the rod part limiting sleeve 230 of each rod member 200 is sleeved on the two bosses 240 of the other rod member 200, the bosses 240 block the radial movement of the limiting protrusions 232 along the rod member 200, so the limiting protrusions 232 can only move along the length direction of the connecting rod 210; the assembly of the socket with the boss 240 forms a limiting mechanism.

[0086] When the two ends of the growth valve assembly are matched with the spine, the fixing sleeve 100 is pulled out, and only an axial pulling force needs to be given to the two rod members 200, so that automatic expansion can be realized.

[0087] The connection of the two rod members 200 adopts the engagement of the ratchet teeth 251, which not only limits the relative sliding and relative rotation between the two rod members 200, but also enables each rod member 200 to only move in the direction away from the matching groove 260, so that the reverse stroke of the growth valve assembly is prevented; at the same time, the rigid connection of the ratchet teeth 251 enables the two rod members 200 to bear axial pressure and the matching of the two rod members 200 is more firm.

[0088] When each rod 200 moves along the direction away from the matching groove 260, and the tooth portion 250 of the two rods 200 is disengaged, the distance that one of the matching rods 220 moves towards the direction away from the other matching rod 220 is the height H2 of the tooth portion 250, the sum of the value of the value of the height H2 of the tooth portion 250 and the value of the value of the height H3 of the convex is less than the value of the convex height H3, which can ensure that the rod 200 moves stably and prevents the rod 200 from being stuck in the socket.

[0089] The two clamping protrusions 130 abut against the two bosses 240 on the other matching rod 220 respectively, at this time, the bosses 240 limit the radial movement of the clamping protrusions 130 along the rod 200.

[0090] In this embodiment, the ratchet teeth 251 are one-way ratchet teeth 251; due to the restriction of the socket, the boss 240 and the one-way ratchet teeth 251, the two rods 200 of the growth valve assembly can only move in one direction, that is, the distance between the two ends of the growth valve assembly can only increase until the rod portions limiting sleeves 230 of the two rods 200 are in contact.

[0091] The plate body inner side surface 121 of the positioning plate 120 is provided with a plate member through hole 122, which extends to the side of the positioning plate 120 away from the sleeve body pressing plate 110. The plate member through hole 122 is provided to facilitate the disassembly of the fixing sleeve 100.

[0092] The clamping surface 131 is provided on the clamping protrusion 130, and the included angle E between the clamping surface 131 and the plate body inner side surface 121 is greater than 90 degrees. This structure facilitates the disassembly and installation of the fixing sleeve 100.

[0093] In order to make the structure of the rod 200 more compact, the connecting rod 210 includes a rod body 211 and a transition connecting portion 212, one end of the transition connecting portion 212 is connected with the rod body 211, and the other end of the transition connecting portion 212 is connected with the matching rod 220. The rod body 211 is a cylindrical structure.

[0094] In order to facilitate installation, the length of the slot of the matching groove 260 is greater than the length of the limiting stop piece 231 of the rod portion limiting sleeve 230; the distance between the limiting protrusions 232 of the two limiting stop pieces 231 is less than the distance between the two table body receiving surfaces 242, the distance between the limiting protrusions 232 of the two limiting stop pieces 231 is greater than the distance between the two receiving side surfaces 222; the distance between the stop piece inner side surfaces 2311 of the two limiting stop pieces 231 is greater than the distance between the two table body receiving surfaces 242.

[0095] The use method of the growth valve assembly of the embodiment, the growth valve assembly is four, the four growth valve assemblies are respectively a first growth valve assembly, a second growth valve assembly, a third growth valve assembly and a fourth growth valve assembly, which includes the following steps:

[0096] 1) one of the rods 200 of the first growth valve assembly is installed in the screw groove of the first pedicle screw 310, the first pedicle screw 310 is installed on the first vertebral body 410 without lateral bending, the other rod 200 of the first growth valve assembly is installed in the first screw groove of the first double-head pedicle screw 510, the first double-head pedicle screw 510 is installed on the vertebral body 610 with the largest lateral bending; one of the rods 200 of the second growth valve assembly is installed in the second screw groove of the first double-head pedicle screw 510, the other rod 200 of the second growth valve assembly is installed in the screw groove of the second pedicle screw 320, the second pedicle screw 320 is installed on the second vertebral body 420 without lateral bending, the vertebral body 610 with the largest lateral bending is between the first vertebral body 410 without lateral bending and the second vertebral body 420 without lateral bending;

[0097] 2) one of the rods 200 of the third growth valve assembly is installed in the screw groove of the third pedicle screw 330, the third pedicle screw 330 is installed on the first vertebral body 410 without lateral bending, the other rod 200 of the third growth valve assembly is installed in the first screw groove of the second double-head pedicle screw 520, the second double-head pedicle screw 520 is installed on the vertebral body 610 with the largest lateral bending; one of the rods 200 of the fourth growth valve assembly is installed in the second screw groove of the second double-head pedicle screw 520, the other rod 200 of the fourth growth valve assembly is installed in the screw groove of the fourth pedicle screw 340, the fourth pedicle screw 340 is installed on the second vertebral body 420 without lateral bending.

[0098] The one-way expandability of the growth valve assembly of the embodiment enables the growth valve assembly to exist in the patient's body for a long time and enables the growth valve assembly to automatically extend with the increase of the patient's height until reaching the expansion limit; the growth valve assembly of the embodiment is a passive device, simple in structure, convenient to operate, automatically expanded and adjusted, effectively prevents reverse movement of the device, can avoid multiple surgeries, and reduces spinal injury. The use method of the growth valve assembly of the embodiment can retain growth potential while avoiding rotation of the vertebral body to cause the deformity to be more severe. When the growth valve assembly is matched with the pedicle screw, the connecting rod of the rod is directly placed into the screw groove, which is conducive to implanting the growth valve assembly into the human body.

[0099] The above embodiments only exemplarily illustrate the principles and effects of the present application, and are not used to limit the present application. Any person skilled in the art can modify or change the above embodiments without departing from the spirit and scope of the present application. Therefore, all equivalent modifications or changes completed by those skilled in the art without departing from the spirit and technical thought disclosed by the present application should be covered by the claims of the present application.

Claims

1. A grow valve assembly, characterized by, The utility model relates to a kind of fixed sleeve (100) and two bars (200);Each of the bar (200) includes connecting rod (210) and cooperation rod (220), one end of the cooperation rod (220) is connected with the connecting rod (210), the other end of the cooperation rod (220) is equipped with rod part limiting sleeve (230), the axial direction of the connecting rod (210) is same with the axial direction of the cooperation rod (220), the axial direction of the cooperation rod (220) is same with the length direction of the cooperation rod (220);The cooperation rod (220) has installation surface (221) and two parallelly arranged receiving side surfaces (222), each of the receiving side surface (222) is perpendicular to the installation surface (221);Each of the receiving side surface (222) is equipped with boss (240), the length of the boss (240) is less than the length of the receiving side surface (222), the boss (240) has support mesa (241) on it, the support mesa (241) is coplanar with the installation surface (221), the side of each of the boss (240) away from the cooperation rod (220) is mesa receiving surface (242), the mesa receiving surface (242) is perpendicular to the support mesa (241), the support mesa (241) of two bosses (240) and the installation surface (221) of the cooperation rod (220) form stretching surface;The stretching surface is equipped with gear portion (250), the gear portion (250) includes a plurality of ratchets (251), all the ratchets (251) are sequentially arranged along the length direction of the stretching surface; The rod part limiting sleeve (230) includes two oppositely arranged limiting stop pieces (231), each of the limiting stop piece (231) is connected with the receiving side surface (222), each of the limiting stop piece (231) has stop piece inner side surface (2311), the stop piece inner side surface (2311) of two limiting stop pieces (231) is oppositely arranged, the stop piece inner side surface (2311) of each of the limiting stop piece (231) is perpendicular to the installation surface (221);The stop piece inner side surface (2311) of two limiting stop pieces (231) and the installation surface (221) form bayonet, the stop piece inner side surface (2311) of each of the limiting stop piece (231) is equipped with limiting protruding portion (232), the limiting protruding portion (232) of two limiting stop pieces (231) is oppositely arranged;Each of the receiving side surface (222), the boss (240) connected with the receiving side surface (222) and the connecting rod (210) form cooperation groove (260);The distance between the limiting protruding portion (232) of two limiting stop pieces (231) is less than the distance between two mesa receiving surfaces (242); The height value of the mesa receiving surface (242) and the height value of the gear portion (250) are added to the sum value, which is the tooth height value, the height value between the limiting protruding portion (232) and the installation surface (221) is the protruding height value, the sum value of the tooth height value and the height value of the gear portion (250) is less than the protruding height value. ​ ​ The fixed sleeve (100) comprises a sleeve pressing plate (110) and two parallel positioning plates (120), two positioning plates (120) are connected to the two sides of the sleeve pressing plate (110) respectively; the positioning plate (120) is provided with a plate body inner side (121), and the plate body inner sides (121) of the two positioning plates (120) are oppositely arranged; the side of each plate body inner side (121) away from the sleeve pressing plate (110) is provided with a clamping protruding piece (130); The two limiting stop pieces (231) of the rod part limiting sleeve (230) on each cooperating rod (220) are respectively inserted into the two cooperating grooves (260) on the other cooperating rod (220), the two cooperating rods (220) form a nested structure, when the tooth parts (250) of the two cooperating rods (220) are engaged with each other, the fixed sleeve (100) sleeves the two cooperating rods (220), the sleeve pressing plate (110) presses one of the cooperating rods (220), each positioning plate (120) presses two bosses (240) on the same side, and the two clamping protruding pieces (130) abut against the two bosses (240) on the other cooperating rod (220) respectively; the connecting rod (210) driving the two rod pieces (200) to move, so that the two rod part limiting sleeves (230) relatively move along the length direction of the rod piece (200), and the bayonet sleeve of the rod part limiting sleeve (230) of each rod piece (200) is sleeved on the two bosses (240) of the other rod piece (200).

2. The growth valve assembly of claim 1, wherein: The plate body inner side (121) of the positioning plate (120) is provided with a plate piece through hole (122).

3. The growth valve assembly of claim 1, wherein: The clamping protruding piece (130) has a clamping surface (131), and the included angle between the clamping surface (131) and the plate body inner side (121) is greater than 90 degrees.

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