Adjustable hook assembly for fixed double rods

Abstract

The present invention provides an adjustable hook assembly for fixing double rods, comprising: a rod hook, which includes a hook head and a connecting rod connected to the hook head; a receiving groove is provided on the hook head, a positioning through hole is provided on the upper part of the hook head, and a positioning internal thread portion is provided at one end of the positioning through hole away from the receiving groove; one end of the hook head in the length direction is connected to the connecting rod; a hook plug is installed in the positioning through hole; a support seat is provided with a seat body installation groove; the top of the support seat is provided with a seat body axial installation hole; two relatively arranged rod installation through holes are also provided on the support seat; a pressing member is inserted into the seat body axial installation hole, a pressing receiving groove is provided at the top of the pressing member; a pressing groove is provided at the bottom of the pressing member. The present invention is an adjustable hook assembly for fixing double rods that can adjust the distance and angle between two fixed rods.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly to an adjustable hook assembly for fixing double rods. Background Art

[0002] Adolescent idiopathic scoliosis, adult degenerative scoliosis deformity, etc. are relatively common diseases. Severe scoliosis with serious deformities often combines with cardiopulmonary dysfunction and nervous system deformities, and the treatment is difficult. Currently, generally traction, release, one-stage or two-stage posterior orthopedics, and spinal osteotomy are required. Although these methods have achieved certain curative effects, there are also problems such as a high incidence of complications and damage such as spinal internal fixation failure. In order to obtain more stable support and curative effects, unilateral double-rod internal fixation is now used to treat severe spinal scoliosis deformities.

[0003] The double-rod fixation system is a system for fixing two fixing rods. Now, the double-rod fixation system has structures such as double-headed screws and double-headed connecting seats. These structures have effectively improved common complications and reduced internal fixation failures through various surgical methods, but they also have structural limitations and lead to deficiencies in surgical operations. For example, they can only fix double rods with a certain spacing and cannot be adjusted flexibly. How to design a hook structure that can adjust the spacing and angle of double rods is a problem that needs to be solved by those skilled in the art. Summary of the Invention

[0004] In view of the above-mentioned disadvantages of the prior art, the technical problem solved by the present invention is to provide an adjustable hook assembly for fixing double rods that can adjust the spacing and angle of double rods.

[0005] To achieve the above object and other related objects, the present invention provides an adjustable hook assembly for fixing double rods, including:

[0006] A rod-shaped hook, the rod-shaped hook includes a hook head and a connecting rod connected to the hook head; a receiving groove is provided on the hook head, the notch of the receiving groove faces downward, and the receiving groove penetrates along the width direction of the hook head. A positioning through hole is provided on the upper part of the hook head, the positioning through hole communicates with the receiving groove, and a positioning internal thread portion is provided at one end of the positioning through hole far from the receiving groove; one end of the hook head in the length direction is connected to the connecting rod, and a recessed groove is provided on the upper part of the connecting rod;

[0007] A hook plug, installed in the positioning through hole;

[0008] Support base, on which there is a seat body mounting groove that penetrates along the radial direction of the support base; there is a seat body axial mounting hole at the top of the support base; there are also two relatively arranged rod member mounting through holes on the support base, each rod member mounting through hole communicates with the seat body axial mounting hole, and the size of the vertical cross-section of each rod member mounting through hole increases sequentially from inside to outside; each rod member mounting through hole is for inserting the connecting rod.

[0009] Pressing member, inserted into the seat body axial mounting hole, the outer peripheral surface of the pressing member has a clearance fit with the seat body axial mounting hole, there is a pressing receiving groove at the top of the pressing member, and the pressing receiving groove penetrates along the radial direction of the pressing member; there is a pressing groove at the bottom of the pressing member, and the pressing groove penetrates along the radial direction of the pressing member, and the bottom of the pressing groove includes two relatively arranged groove body inclined surfaces, and the two groove body inclined surfaces are connected by an arc-shaped groove bottom surface; the groove wall of the pressing groove is two relatively arranged groove body wall surfaces, and each groove body wall surface is connected to one of the groove body inclined surfaces; the pressing groove is for inserting the connecting rod, and both groove body wall surfaces of the pressing groove are in contact with the connecting rod.

[0010] Preferably, there is a seat body retaining platform on the seat body axial mounting hole.

[0011] There are a limiting groove and a guiding groove on the pressing member, the limiting groove is above the guiding groove, and a flange portion is formed between the limiting groove and the guiding groove.

[0012] When the flange portion of the pressing member moves below the seat body retaining platform of the support base, the seat body retaining platform blocks the flange portion.

[0013] Preferably, the external thread portion of the hook plug includes a mounting external thread portion and a limiting external thread portion arranged sequentially from top to bottom, the pitch of the mounting external thread portion is smaller than the pitch of the limiting external thread portion, and the mounting external thread portion can be threadedly connected with the positioning internal thread portion.

[0014] Preferably, the groove wall on the side of the receiving groove away from the connecting rod is an arc-shaped groove wall.

[0015] Preferably, the recessed groove includes a top groove and two side grooves, the two side grooves are respectively arranged on both sides of the top groove, the bottom surface of the top groove is an arc-shaped bottom surface, the bottom surface of each side groove is a plane, and the bottom surface of each side groove is tangent to the bottom surface of the top groove; the bottom surface of the top groove is coaxially arranged with the connecting rod.

[0016] Preferably, there is a circular recessed structure on the end surface of the end of the connecting rod away from the hook head.

[0017] Preferably, a pressing receiving groove is provided at the top of the pressing member. The pressing receiving groove penetrates along the radial direction of the pressing member. The pressing receiving groove includes a first groove portion and a second groove portion arranged in sequence along the radial direction of the pressing member. The first groove portion and the second groove portion have the same structure. The sizes of the vertical cross-sections of the first groove portion and the second groove portion both increase sequentially from inside to outside along the radial direction of the pressing member.

[0018] Furthermore, the included angle formed by two opposite groove walls of the first groove portion is equal to the included angle formed by two vertical hole walls of each rod mounting through hole.

[0019] As described above, an adjustable hook assembly for fixing double rods of the present invention has the following beneficial effects:

[0020] When the adjustable hook assembly for fixing double rods is in use, the connecting rod is sequentially passed through two rod mounting through holes of the support seat, the pressing member is inserted into the axial mounting hole of the seat body of the support seat, the connecting rod in the support seat is inserted into the recessed groove, both groove walls of the pressing groove are in contact with the connecting rod, and the arc-shaped groove bottom surface of the pressing groove is in contact with the groove bottom surface of the recessed groove of the connecting rod. The fixing rod can be installed in the receiving groove of the rod-with-hook, and the hook part plug can extend into the receiving groove, and the hook part plug can block the fixing rod in the receiving groove from moving out, so that the position of the fixing rod in the receiving groove is stable;

[0021] A fixing rod is installed in the pressing receiving groove of the pressing member; since the support seat can drive the pressing member to slide along the axial direction of the connecting rod, the distance between the two fixing rods can be adjusted;

[0022] Since the sizes of the vertical cross-sections of each rod mounting through hole increase sequentially from inside to outside, the rod-with-hook and the support seat can swing relative to each other around the central axis of the axial mounting hole of the seat body of the support seat; since a recessed groove is provided in the upper part of the connecting rod, the rod-with-hook and the support seat can swing relative to each other around the central axis of the connecting rod; therefore, the angle between the fixing rod installed in the pressing receiving groove of the pressing member and the fixing rod installed in the receiving groove of the rod-with-hook can be adjusted;

[0023] The present invention is an adjustable hook assembly for fixing double rods that can adjust the distance and angle between two fixing rods. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It shows a three-dimensional structural schematic diagram of the adjustable hook assembly for fixing double rods of this embodiment.

[0025] Figure 2 It shows a three-dimensional structural schematic diagram when the adjustable hook assembly for fixing double rods of this embodiment is disassembled.

[0026] Figure 3Schematic cross-sectional structure diagram of the rod hook of the adjustable hook assembly with fixed double rods according to this embodiment.

[0027] Figure 4 Shown as Figure 3 Schematic cross-sectional structure diagram in the E-E direction of

[0028] Figure 5 Schematic top view structure diagram of the rod hook of the adjustable hook assembly with fixed double rods according to this embodiment.

[0029] Figure 6 Schematic structure diagram of the hook plug of the adjustable hook assembly with fixed double rods according to this embodiment.

[0030] Figure 7 Shown as Figure 6 Schematic cross-sectional structure diagram in the F-F direction of

[0031] Figure 8 Schematic three-dimensional structure diagram of the support seat of the adjustable hook assembly with fixed double rods according to this embodiment.

[0032] Figure 9 Schematic half-sectional structure diagram of the support seat of the adjustable hook assembly with fixed double rods according to this embodiment.

[0033] Figure 10 Schematic side view structure diagram of the support seat of the adjustable hook assembly with fixed double rods according to this embodiment.

[0034] Figure 11 Shown as Figure 10 Schematic cross-sectional structure diagram in the G-G direction of

[0035] Figure 12 Schematic side view structure diagram of the pressing member of the adjustable hook assembly with fixed double rods according to this embodiment.

[0036] Figure 13 Shown as Figure 12 Schematic cross-sectional structure diagram in the J-J direction of

[0037] Figure 14 Schematic top view structure diagram of the pressing member of the adjustable hook assembly with fixed double rods according to this embodiment.

[0038] Figure 15 Schematic structure diagram of the hook plug of the adjustable hook assembly with fixed double rods inserted into the receiving groove according to this embodiment.

[0039] Figure 16 Schematic structure diagram of the hook plug of the adjustable hook assembly with fixed double rods installed in the positioning through hole according to this embodiment.

[0040] Figure 17Schematic three-dimensional structure diagram when showing the rod installation through-hole of the connecting rod alignment support seat of the adjustable hook assembly with fixed double rods of the present embodiment.

[0041] Figure 18 Schematic three-dimensional structure diagram when showing the adjustable hook assembly with fixed double rods of the present embodiment after assembly and when the support seat is not in contact with the hook head.

[0042] Figure 19 Schematic cross-sectional structure diagram at the connection between the pressing member and the connecting rod when showing the adjustable hook assembly with fixed double rods of the present embodiment after assembly.

[0043] Figure 20 Shown as Figure 19 Enlarged structure diagram at position K of

[0044] Figure 21 Schematic three-dimensional structure diagram when showing the operation of turning over one end of the connecting rod of the adjustable hook assembly with fixed double rods of the present embodiment away from the hook head.

[0045] Figure 22 Enlarged structure diagram after the operation of turning over one end of the connecting rod of the adjustable hook assembly with fixed double rods of the present embodiment away from the hook head.

[0046] Figure 23 Schematic side structure diagram when showing the adjustable hook assembly with fixed double rods of the present embodiment after assembly.

[0047] Figure 24 Shown as Figure 23 Cross-sectional structure diagram in the M-M direction of

[0048] Figure 25 Shown as Figure 23 Cross-sectional structure diagram in the N-N direction of

[0049] Figure 26 Schematic cross-sectional structure diagram after the connecting rod of the rod-equipped hook of the adjustable hook assembly with fixed double rods of the present embodiment and the support seat swing relative to each other around the central axis of the connecting rod.

[0050] Figure 27 Schematic cross-sectional structure diagram when the connecting rod of the rod-equipped hook of the adjustable hook assembly with fixed double rods of the present embodiment and the support seat swing relative to each other around the central axis of the connecting rod to two extreme positions.

[0051] Figure 28 Schematic cross-sectional structure diagram after the connecting rod of the rod-equipped hook of the adjustable hook assembly with fixed double rods of the present embodiment and the support seat swing relative to each other around the central axis of the axial installation hole of the seat body of the support seat.

[0052] Figure 29Schematic cross-sectional structure diagram when the connecting rod of the rod hook of the adjustable hook assembly with fixed double rods in this embodiment and the support seat swing relative to the central axis of the axial mounting hole of the seat body of the support seat to two extreme positions.

[0053] Figure 30 Schematic structure diagram showing the adjustable hook assembly with fixed double rods in this embodiment installed on two fixed rods and before the correction of the two fixed rods.

[0054] Figure 31 Shown as Figure 30 Enlarged structure diagram at P of

[0055] Figure 32 Schematic structure diagram showing the adjustable hook assembly with fixed double rods in this embodiment installed on two fixed rods and after the correction of the two fixed rods.

[0056] Figure 33 Shown as Figure 32 Enlarged structure diagram at Q of

[0057] Figure 34 Schematic structure diagram when the hook plug of the adjustable hook assembly with fixed double rods in this embodiment extends into the receiving groove.

[0058] Figure 35 Schematic three-dimensional structure diagram of the pressing member of the adjustable hook assembly with fixed double rods in this embodiment.

[0059] Explanation of reference numerals in the drawings

[0060] 1 Fixed rod

[0061] 10 Rod hook

[0062] 110 Hook head

[0063] 111 Receiving groove

[0064] 112 Arc-shaped groove wall

[0065] 113 Smooth hole part

[0066] 114 Threaded hole part

[0067] 115 Positioning through hole

[0068] 120 Connecting rod

[0069] 121 Concave groove

[0070] 122 Top groove

[0071] 123 Bottom surface of the top groove

[0072] 124 Bottom surface of the side groove

[0073] 125 Side groove

[0074] 126 Circular depression structure

[0075] 20 Hook plug

[0076] 210 Installation external thread part

[0077] 211 Limit external thread part

[0078] 212 Conical structure

[0079] 213 Driving groove

[0080] 30 Support base

[0081] 301 Lower part of the base body

[0082] 302 Upper part of the base body

[0083] 303 Arm part of the base body

[0084] 311 Base body installation groove

[0085] 312 Axial internal thread part of the base body

[0086] 313 Axial installation hole of the base body

[0087] 314 Stopping platform of the base body

[0088] 315 Through hole for rod installation

[0089] 40 Compression part

[0090] 411 Outer peripheral surface

[0091] 412 Limit groove

[0092] 413 Guide groove

[0093] 414 Flange part

[0094] 420 Compression groove

[0095] 421 Bottom surface of the arc-shaped groove

[0096] 422 Inclined surface of the groove body

[0097] 423 Wall surface of the groove body

[0098] 430 Compression accommodation groove

[0099] 431 First groove part

[0100] 432 Second groove part

[0101] 50 Compression plug Detailed implementation mode

[0102] The following specific embodiments illustrate the implementation mode of the present invention. Those familiar with this technology can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0103] Please refer to the attached drawings. It should be noted that the structures, proportions, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the limited conditions for the implementation of the present invention. Therefore, they do not have any technical substance. Any modification of the structure, change of the proportional relationship, or adjustment of the size should still fall within the scope covered by the technical content disclosed in the present invention without affecting the effects that the present invention can produce and the purposes that can be achieved. At the same time, the terms such as "upper", "lower", "left", "right", "middle", and "one" cited in this specification are only for the convenience of clear narration and are not used to limit the scope for the implementation of the present invention. The change or adjustment of their relative relationships should also be regarded as the scope for the implementation of the present invention without substantial change in the technical content.

[0104] The adjustable hook assembly of the fixed double rods in this embodiment includes:

[0105] As Figures 1 to 5 、 Figure 8 、 Figures 10 to 14 、 Figures 23 to 26 、 Figure 28 、 Figures 30 to 34 shown, the rod - equipped hook 10, the rod - equipped hook 10 includes a hook head 110 and a connecting rod 120 connected to the hook head 110; a receiving groove 111 is provided on the hook head 110, the notch of the receiving groove 111 faces downward, and the receiving groove 111 penetrates along the width direction of the hook head 110. A positioning through - hole 115 is provided on the upper part of the hook head 110, the positioning through - hole 115 is communicated with the receiving groove 111, and a positioning internal thread part is provided at the end of the positioning through - hole 115 far from the receiving groove 111; one end of the hook head 110 in the length direction is connected to the connecting rod 120, and a concave groove 121 is provided on the upper part of the connecting rod 120;

[0106] The hook - part plug 20 is installed in the positioning through - hole 115;

[0107] The support seat 30, a seat - body installation groove 311 is provided on the support seat 30, and the seat - body installation groove 311 penetrates along the radial direction of the support seat 30; a seat - body axial installation hole 313 is provided at the top of the support seat 30; two relatively arranged rod - installation through - holes 315 are also provided on the support seat 30, each rod - installation through - hole 315 is communicated with the seat - body axial installation hole 313, and the size of the vertical cross - section of each rod - installation through - hole 315 increases sequentially from inside to outside; each rod - installation through - hole 315 is for the connecting rod 120 to be inserted;

[0108] The pressing member 40 is inserted into the axial mounting hole 313 of the seat body. The outer peripheral surface 411 of the pressing member 40 and the axial mounting hole 313 of the seat body are in clearance fit. The top of the pressing member 40 is provided with a pressing receiving groove 430, and the pressing receiving groove 430 penetrates along the radial direction of the pressing member 40; the bottom of the pressing member 40 is provided with a pressing groove 420, and the pressing groove 420 penetrates along the radial direction of the pressing member 40. The groove bottom of the pressing groove 420 includes two oppositely arranged groove body inclined surfaces 422, and the two groove body inclined surfaces 422 are connected by an arc-shaped groove bottom surface 421; the groove walls of the pressing groove 420 are two oppositely arranged groove body wall surfaces 423, and each groove body wall surface 423 is connected to a groove body inclined surface 422; the pressing groove 420 is for the connecting rod 120 to be inserted, and the two groove body wall surfaces 423 of the pressing groove 420 are both in contact with the connecting rod 120.

[0109] When the adjustable hook assembly for fixing the double rods is in use, the connecting rod 120 is sequentially inserted through the two rod mounting through holes 315 of the support seat 30, and the pressing member 40 is inserted into the axial mounting hole 313 of the seat body of the support seat 30. The connecting rod 120 in the support seat 30 is inserted into the recessed groove 121, and the two groove body wall surfaces 423 of the pressing groove 420 of the pressing member 40 are in contact with the connecting rod 120; when the adjustable hook assembly is installed, when the connecting rod 120 and the support seat 30 are in the initial state and there is no relative rotation between the connecting rod 120 and the support seat 30, the arc-shaped groove bottom surface 421 of the pressing groove 420 can be in contact with the groove bottom surface of the recessed groove 121 of the connecting rod 120;

[0110] The fixed rod 1 can be installed in the receiving groove 111 of the belt rod hook 10. The hook portion plug 20 can extend into the receiving groove 111, and the hook portion plug 20 can block the fixed rod 1 in the receiving groove 111 from moving out, so that the position of the fixed rod 1 in the receiving groove 111 is stable; the fixed rod 1 is installed in the pressing receiving groove 430 of the pressing member 40; after the two fixed rods 1 are corrected to the preset positions, the pressing plug 50 is installed in the axial mounting hole 313 of the seat body of the support seat 30, and the pressing plug 50 presses the fixed rod 1 in the pressing receiving groove 430, then the adjustable hook assembly can fix the two fixed rods 1.

[0111] Since the support seat 30 can drive the pressing member 40 to slide along the axial direction of the connecting rod 120, the distance between the support seat 30 and the hook head 110 is adjustable, and the distance between the two fixed rods 1 can be adjusted;

[0112] Since the size of the vertical cross-section of each rod installation through-hole 315 increases sequentially from the inside to the outside, the rod hook 10 and the support base 30 can swing relative to each other around the central axis of the seat body axial installation hole 313 of the support base 30. Then, the rod hook 10 can drive the pressing member 40 to swing around the central axis of the seat body axial installation hole 313 of the support base 30. Since the upper part of the connecting rod 120 is provided with a recessed groove 121, the rod hook 10 and the support base 30 can swing relative to each other around the central axis of the connecting rod 120. Then, the support base 30 can drive the pressing member 40 to swing around the central axis of the connecting rod 120. Therefore, the angle between the fixing rod 1 installed in the pressing accommodation groove 430 of the pressing member 40 and the fixing rod 1 installed in the receiving groove 111 of the rod hook 10 can be adjusted;

[0113] The present invention is an adjustable hook assembly for fixing two rods that can adjust the distance and angle between the two fixing rods 1. Then, the adjustable hook assembly can instantaneously stabilize the orthopedic effects such as rotation and translation of the spine during the operation. The distance between the support base 30 and the hook head 110 is adjustable, which can meet the dynamic traction of the two fixing rods 1 during the operation, so that the offset spine approaches the midline, assisting in completing the translational orthopedics of the spine. The rod hook 10 and the support base 30 can swing relative to each other around the central axis of the seat body axial installation hole 313 of the support base 30, and the rod hook 10 and the support base 30 can swing relative to each other around the central axis of the connecting rod 120. This enables the adjustable hook assembly to adapt to the adjustment requirements of various spatial angles of the two fixing rods 1, facilitating the locking and fixing of the fixing rods 1, reducing operations such as bending the rods and adjustment, saving the operation time. After pre-tightening the compression plug 50, the rotational orthopedic effect during the operation can be stabilized, gradually achieving the optimal orthopedic state, restoring the normal physiological structure of the spine. After the operation, it can prevent the fixing rods 1 and the vertebral body from rotating, pull the two fixing rods 1, strengthen the stability of the internal fixation system, and maintain the balance state of the spine. The adjustable hook assembly is easy to operate, especially meeting the needs of doctors to instantaneously stabilize the orthopedic effect during the operation.

[0114] A seat body stop 314 is provided on the seat body axial installation hole 313;

[0115] The pressing member 40 is provided with a limiting groove 412 and a guiding groove 413. The limiting groove 412 is located above the guiding groove 413, and a flange portion 414 is formed between the limiting groove 412 and the guiding groove 413;

[0116] When the flange portion 414 of the pressing member 40 moves below the seat body stop 314 of the support base 30, the seat body stop 314 blocks the flange portion 414. This structure enables the seat body stop 314 to limit the upward movement of the pressing member 40, ensuring the stable position of the pressing member 40 when the rod hook 10 drives the pressing member 40 to move.

[0117] The outer peripheral surface 411 of the pressing member 40 is a cylindrical surface; there are two limiting grooves 412 and two guiding grooves 413. One guiding groove 413 is provided directly below each limiting groove 412; a flange portion 414 is formed between each limiting groove 412 and the guiding groove 413 below it, so there are two flange portions 414. The flange portion 414 is an annular structure.

[0118] As Figures 12 to 14 , Figure 35 shown, in order to make the structure of the pressing member 40 more compact, the vertical plane passing through the central axis of the pressing member 40 is the middle plane S1 of the pressing portion. The two limiting grooves 412 are symmetrically arranged with the middle plane S1 of the pressing portion as the central plane. The two guiding grooves 413 are symmetrically arranged with the middle plane S1 of the pressing portion as the central plane. The pressing groove 420 is a structure symmetrically arranged with the middle plane S1 of the pressing portion as the central plane. Each groove body inclined surface 422 is tangent to the arc-shaped groove bottom surface 421, and the groove body wall surface 423 is a vertically arranged plane.

[0119] As Figure 3 , Figure 6 , Figure 7 , Figure 15 and Figure 16 shown, the external thread portion of the hook plug 20 includes a mounting external thread portion 210 and a limiting external thread portion 211 arranged in sequence from top to bottom. The pitch of the mounting external thread portion 210 is smaller than that of the limiting external thread portion 211, and the mounting external thread portion 210 can be threadedly connected to the positioning internal thread portion. Since the hook plug 20 is inserted from the lower end of the positioning through hole 115, the arrangement of the mounting external thread portion 210 and the limiting external thread portion 211 enables the mounting external thread portion 210 to be threadedly connected to the positioning internal thread portion. When the hook plug 20 rotates to the position where it cannot rotate anymore, the limiting external thread portion 211 is used to block the hook plug 20 from continuing to advance, preventing the hook plug 20 from being screwed out and falling into the human body during the operation. When the hook plug 20 rotates to the position where it cannot rotate anymore, the hook plug 20 does not block the receiving groove 111 at all, and the fixing rod 1 can slide into the receiving groove 111.

[0120] The lower end of the hook plug 20 is a conical structure 212, and the limiting external thread portion 211 is located between the conical structure 212 and the mounting external thread portion 210. The setting of the conical structure 212 facilitates the hook plug 20 to extend into the positioning through hole 115; a driving groove 213 is provided at the upper end of the hook plug 20, and the central axis of the driving groove 213 is coaxially arranged with the central axis of the hook plug 20. The setting of the driving groove 213 facilitates the connection of the tool to the hook plug 20 to facilitate the tool to rotate the hook plug 20.

[0121] Since the cross-section of the fixing rod 1 is circular, and the groove wall on the side of the receiving groove 111 away from the connecting rod 120 is an arc-shaped groove wall 112, the fixing rod 1 can enter the receiving groove 111 from the notch of the receiving groove 111 and then slide to the arc-shaped groove wall 112, facilitating the stable accommodation of the fixing rod 1 by the arc-shaped groove wall 112. In this embodiment, the arc-shaped groove wall 112 is semi-circular.

[0122] The axial direction of the positioning through hole 115 is inclined with respect to the axial direction of the connecting rod 120. The positioning through hole 115 includes a light hole portion 113 and a threaded hole portion 114 arranged in sequence from bottom to top. There is no thread in the light hole portion 113, and a positioning internal thread portion is provided in the threaded hole portion 114; the diameter of the light hole portion 113 is larger than the diameter of the threaded hole portion 114 to ensure that the hook plug 20 matching the positioning internal thread portion can pass through the light hole portion 113.

[0123] As Figures 2 to 5 shown, the recessed groove 121 includes a top groove 122 and two side grooves 125. The two side grooves 125 are respectively arranged on both sides of the top groove 122. The bottom surface 123 of the top groove is an arc-shaped bottom surface, the bottom surface 124 of each side groove is a plane, and the bottom surface 124 of each side groove is tangent to the bottom surface 123 of the top groove; the bottom surface 123 of the top groove is coaxially arranged with the connecting rod 120. Since the support seat 30 drives the pressing member 40 to swing around the central axis of the connecting rod 120; the setting of the recessed groove 121 enables the belt rod hook 10 and the support seat 30 to have a larger swing angle when swinging around the central axis of the connecting rod 120. In this embodiment, the vertical plane passing through the central axis of the connecting rod 120 is the vertical middle plane S2 of the rod member, and the recessed groove 121 is a symmetrically arranged structure with the vertical middle plane S2 of the rod member as the central plane.

[0124] As Figure 4 、 Figure 12 、 Figure 19 、 Figure 20 and Figure 27 shown, the included angle between the bottom surfaces 124 of the two side grooves is angle A; the included angle between the two groove inclined surfaces 422 of the pressing member 40 is angle C, and the swing angle range of the belt rod hook 10 and the support seat 30 around the central axis of the connecting rod 120 is angle Y; the value of angle Y is equal to the difference between angle C and angle A.

[0125] The depth of the top groove 122 is the maximum depth of the recessed groove 121. The depth of the top groove 122 is the minimum radial distance a between the groove bottom surface 123 of the top groove and the circle where the outer peripheral surface 411 of the connecting rod 120 is located; the distance between the bottom wall of the rod mounting through hole 315 of the support base 30 and the lower end of the seat body retaining table 314 of the support base 30 is H; the connecting rod 120 is cylindrical, and the diameter of the connecting rod 120 is d; the distance between the upper end of the flange portion 414 of the pressing member 40 and the bottom end of the pressing groove 420 is h;

[0126] When the flange portion 414 of the pressing member 40 moves below the seat body retaining table 314 of the support base 30 and the seat body retaining table 314 blocks the flange portion 414, it is necessary to satisfy that the flange portion 414 of the pressing member 40 can reach below the seat body retaining table 314 of the support base 30, and at the same time, ensure that the pressing member 40 has a clearance c. The clearance c of the pressing member 40 must satisfy the design dimension requirement: c > 0;

[0127] c = H - h - (d - a) > 0;

[0128] That is, H - h - d + a > 0;

[0129] That is, h + d < H + a; (Formula 1)

[0130] To ensure that the rod - equipped hook 10 does not come out of the support base 30, it is necessary to ensure the design dimension: a > c;

[0131] That is, a > H - h - (d - a);

[0132] That is, h + d > H. (Formula 2)

[0133] Combining Formula 1 and Formula 2, to ensure that after the rod - equipped hook 10, the support base 30 and the pressing ring are assembled, the pressing member 40 is stably inserted between the rod - equipped hook 10 and the support base 30 and the rod - equipped hook 10, the support base 30 and the pressing member 40 cannot come out of each other, then it is necessary to satisfy the design dimension requirement: H < h + d < H + a.

[0134] As Figure 21 and Figure 22 shown, a circular recessed structure 126 is provided on the end face of the end of the connecting rod 120 far from the hook head 110. The circular recessed structure 126 makes the end of the connecting rod 120 far from the hook head 110 form an annular wall portion, which is convenient for flanging operation.

[0135] As Figure 3 、 Figure 8 、 Figure 9 and Figure 33As shown, an upper portion of the seat body axial mounting hole 313 of the support seat 30 is provided with a seat body axial internal thread portion 312, and the compression plug 50 can be threadedly connected to the seat body axial internal thread portion 312. The compression plug 50 can be used to compress and fix the fixing rod 1.

[0136] The support seat 30 includes a connected seat body lower portion 301 and a seat body upper portion 302. The seat body mounting groove 311 divides the seat body upper portion 302 into two relatively arranged seat body arm portions 303. In this embodiment, there are two seat body retaining platforms 314, and each seat body arm portion 303 is provided with a seat body retaining platform 314. The two seat body retaining platforms 314 are relatively arranged. In order to make the structure of the support seat 30 more compact, a plane passing through the central axis of the support seat 30 and vertically arranged is the seat body vertical middle plane S3. The two seat body arm portions 303 are symmetrically arranged with the seat body vertical middle plane S3 as the central plane. The two seat body retaining platforms 314 are symmetrically arranged with the seat body vertical middle plane S3 as the central plane. Two rod member mounting through holes 315 are provided on the seat body lower portion 301. The through direction of the rod member mounting through holes 315 is perpendicular to the through direction of the seat body mounting groove 311. The two rod member mounting through holes 315 are symmetrically arranged with the seat body vertical middle plane S3 as the central plane.

[0137] The bottom surface of the seat body axial mounting hole 313 is lower than the bottom surface of each rod member mounting through hole 315. This structure ensures that when the connecting rod 120 moves relative to the support seat 30, the bottom surface of the seat body axial mounting hole 313 will not interfere with the connecting rod 120.

[0138] As Figure 10 、 Figure 11 shown, since the size of the vertical cross-section of each rod member mounting through hole 315 increases sequentially from inside to outside, on the horizontal cross-section of each rod member mounting through hole 315, the included angle formed by the two side hole walls of the rod member mounting through hole 315 is angle B1.

[0139] As Figures 10 to 14 shown, the top of the pressing member 40 is provided with a pressing receiving groove 430. The pressing receiving groove 430 penetrates along the radial direction of the pressing member 40. The pressing receiving groove 430 includes a first groove portion 431 and a second groove portion 432 arranged sequentially along the radial direction of the pressing member 40. The first groove portion 431 and the second groove portion 432 have the same structure. The size of the vertical cross-section of the first groove portion 431 and the size of the vertical cross-section of the second groove portion 432 both increase sequentially from inside to outside along the radial direction of the pressing member 40. This structure enables the fixing rod 1 placed in the pressing receiving groove 430 to swing in the pressing receiving groove 430.

[0140] The included angle formed by two opposite groove walls of the first groove portion 431 is angle B2, and angle B2 is equal to angle B1. Angle B2 corresponds to the swinging angle of the fixing rod 1 in the pressing receiving groove 430, and angle B1 corresponds to the swinging angle of the connecting rod 120 in the support seat 30. Angle B2 being equal to angle B1 can ensure that both the fixing rod 1 and the connecting rod 120 can reach the preset swinging angles.

[0141] The installation method of the adjustable hook assembly with fixed double rods in this embodiment includes the following steps:

[0142] As Figures 15 to 16 shown in, 1) Insert the hook plug 20 from the lower end of the positioning through hole 115 of the rod - with - hook 10. After the external threaded portion 210 for installation of the hook plug 20 is thread - connected to the threaded hole portion 114 of the positioning through hole 115, rotate the hook plug 20 until it cannot be rotated further. The limiting external threaded portion 211 blocks the further advancement of the hook plug 20; this prevents the hook plug 20 from being screwed out and falling into the human body during the operation. At this time, the hook plug 20 is in the positioning through hole 115, and the hook plug 20 does not block the receiving groove 111 at all, and the fixing rod 1 can be placed into the receiving groove 111.

[0143] As Figure 8 、 Figures 17 to 20 shown in, 2) Insert the connecting rod 120 into the two rod - installation through holes 315 of the support seat 30 in sequence, and insert the pressing member 40 into the axial installation hole 313 of the seat body of the support seat 30. The outer peripheral surface 411 of the pressing member 40 fits against the hole wall of the axial installation hole 313 of the seat body. Adjust the pressing member 40 so that the seat body stop 314 of the support seat 30 falls into the guiding groove 413, and the pressing groove 420 of the pressing member 40 is directly above the recessed groove 121 of the connecting rod 120. After pressing down the pressing member 40, the flange portion 414 of the pressing member 40 crosses over the seat body stop 314 of the support seat 30, and the pressing member 40 is embedded in the axial installation hole 313 of the seat body and will not come out. At this time, both groove wall surfaces 423 of the pressing groove 420 are in contact with the connecting rod 120, and the arc - shaped groove bottom surface 421 of the pressing groove 420 is in contact with the groove bottom surface of the recessed groove 121 of the connecting rod 120.

[0144] As Figures 23 to 29 shown in, 3) After assembling the support seat 30 and the pressing member 40, the support seat 30 can drive the pressing member 40 to slide along the axial direction of the connecting rod 120. The rod - with - hook 10 and the support seat 30 can swing relative to each other around the central axis of the axial installation hole 313 of the seat body of the support seat 30, and the swinging angle is B1; the rod - with - hook 10 and the support seat 30 can swing relative to each other around the central axis of the connecting rod 120, and the swinging angle is Y.

[0145] As Figures 20 to 21 shown in, 4) Finally, in order to further enhance the anti - detachment ability of the adjustable hook assembly, turn over the flanging of the circular - ring - shaped wall portion at the end of the connecting rod 120.

[0146] The usage method of the adjustable hook assembly for fixing double rods in this embodiment includes the following steps:

[0147] As Figure 3 、 Figures 30 to 33 shown, install this adjustable hook assembly between two fixing rods 1 to be orthopedically treated. One fixing rod 1 is placed into the receiving groove 111, and the hook plug 20 moves into the receiving groove 111. The hook plug 20 is in a pre-locked state to prevent the fixing rod 1 from sliding out of the receiving groove 111. The other fixing rod 1 is placed into the seat body installation groove 311, and the pressing plug 50 is installed in the seat body installation groove 311. The pressing plug 50 is in a pre-locked state. At this time, the rod spacing between the two fixing rods 1 is relatively large, and the support seat 30 and the pressing member 40 slide on the connecting rod 120 to a position farther away from the hook head 110. Through orthopedic operations, the vertebral offset distance gradually decreases. During the orthopedic process, the adjustable hook assembly always maintains the pulling of the two fixing rods 1 and resists the rotation between the two fixing rods 1 to maintain the immediate stability of the spine after orthopedics until the ideal orthopedic effect is achieved. Then lock the hook plug 20 and the pressing plug 50. At this time, the support seat 30 and the pressing member 40 are compressed to a position closer to the hook head 110.

[0148] The present invention provides an adjustable hook assembly that can dynamically tighten two fixing rods 1 at the beginning of the operation and can stably rotate the orthopedic effect at any time. This adjustable hook assembly can not only make the existing operation of connecting and fixing between double rods simpler and more reliable, but also connect and fix two fixing rods 1 that cannot be connected and fixed in the existing operation with the adjustable hook assembly.

[0149] The above embodiments are only illustrative of the principles and effects of the present invention and are not used to limit the present invention. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. An adjustable hook assembly for fixing double rods, characterized in that, Comprising: A rod - equipped hook (10), the rod - equipped hook (10) comprising a hook head (110) and a connecting rod (120) connected to the hook head (110); a receiving groove (111) is provided on the hook head (110), the notch of the receiving groove (111) faces downward, and the receiving groove (111) penetrates along the width direction of the hook head (110). A positioning through - hole (115) is provided in the upper part of the hook head (110), the positioning through - hole (115) communicates with the receiving groove (111), and a positioning internal thread portion is provided at one end of the positioning through - hole (115) away from the receiving groove (111); the connecting rod (120) is connected to one end of the hook head (110) in the length direction thereof, and a recessed groove (121) is provided in the upper part of the connecting rod (120). A hook - part plug (20), installed in the positioning through - hole (115). A support seat (30), a seat - body installation groove (311) is provided on the support seat (30), and the seat - body installation groove (311) penetrates along the radial direction of the support seat (30); a seat - body axial installation hole (313) is provided at the top of the support seat (30); two relatively - arranged rod - installation through - holes (315) are further provided on the support seat (30), each rod - installation through - hole (315) communicates with the seat - body axial installation hole (313), and the size of the vertical cross - section of each rod - installation through - hole (315) increases sequentially from the inside to the outside; each rod - installation through - hole (315) is for the connecting rod (120) to be inserted. A pressing member (40), inserted into the seat - body axial installation hole (313), the outer peripheral surface (411) of the pressing member (40) has a clearance fit with the seat - body axial installation hole (313). A pressing receiving groove (430) is provided at the top of the pressing member (40), and the pressing receiving groove (430) penetrates along the radial direction of the pressing member (40); a pressing groove (420) is provided at the bottom of the pressing member (40), and the pressing groove (420) penetrates along the radial direction of the pressing member (40). The bottom of the pressing groove (420) includes two relatively - arranged groove body inclined surfaces (422), and the two groove body inclined surfaces (422) are connected by an arc - shaped groove bottom surface (421); the groove wall of the pressing groove (420) is two relatively - arranged groove body wall surfaces (423), and each groove body wall surface (423) is connected to one of the groove body inclined surfaces (422); the pressing groove (420) is for the connecting rod (120) to be inserted, and both groove body wall surfaces (423) of the pressing groove (420) are in contact with the connecting rod (120).

2. The adjustable hook assembly for fixing double rods according to claim 1, wherein: A seat - body stop (314) is provided on the seat - body axial installation hole (313). The pressing member (40) is provided with a limiting groove (412) and a guiding groove (413). The limiting groove (412) is above the guiding groove (413), and a flange portion (414) is formed between the limiting groove (412) and the guiding groove (413). When the flange portion (414) of the pressing member (40) moves below the seat body retaining platform (314) of the support seat (30), the seat body retaining platform (314) blocks the flange portion (414).

3. The adjustable hook assembly for fixing double rods according to claim 1, wherein: The external thread portion of the hook plug (20) includes an installation external thread portion (210) and a limiting external thread portion (211) which are arranged in sequence from top to bottom. The pitch of the installation external thread portion (210) is smaller than the pitch of the limiting external thread portion (211), and the installation external thread portion (210) can be threadedly connected with the positioning internal thread portion.

4. The adjustable hook assembly for fixing double rods according to claim 1, wherein: The groove wall on the side of the receiving groove (111) away from the connecting rod (120) is an arc-shaped groove wall (112).

5. The adjustable hook assembly for fixing double rods according to claim 1, characterized in that: The recessed groove (121) includes a top groove (122) and two side grooves (125). The two side grooves (125) are respectively arranged on both sides of the top groove (122). The bottom surface (123) of the top groove is an arc-shaped bottom surface, the bottom surface (124) of each side groove is a plane, and the bottom surface (124) of each side groove is tangent to the bottom surface (123) of the top groove. The bottom surface (123) of the top groove is coaxially arranged with the connecting rod (120).

6. The adjustable hook assembly for fixing double rods according to claim 1, characterized in that: A circular recessed structure (126) is provided on the end surface of the end of the connecting rod (120) away from the hook head (110).

7. The adjustable hook assembly for fixing double rods according to claim 1, wherein: The pressing receiving groove (430) includes a first groove portion (431) and a second groove portion (432) which are arranged in sequence along the radial direction of the pressing member (40). The first groove portion (431) and the second groove portion (432) have the same structure. The dimensions of the vertical cross-section of the first groove portion (431) and the dimensions of the vertical cross-section of the second groove portion (432) both increase in sequence from inside to outside along the radial direction of the pressing member (40).

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