Single head fixation structure, double head fixation structure and spinal fixation assembly

Abstract

The application provides a single-head fixing structure, a double-head fixing structure and an intraspinal fixation assembly. The single-head fixing structure comprises two clamping rings, a first connecting rod and a clamping part screw. When the first connecting rod is placed in an arc-shaped groove and the two clamping rings are respectively sleeved on the two ends of a clamping part nail seat, the upper hole walls of the two clamping rings press the first connecting rod, and the two clamping rings are clamped with the first connecting rod. The lower hole walls of the two clamping rings respectively press the first side bottom surface and the second side bottom surface of the clamping part nail seat, and the two clamping rings are clamped with the clamping part nail seat. The intraspinal fixation assembly comprises a clamping type fixing structure and a single-head fixing structure. The single-head fixing structure is convenient to install and stable in structure. The intraspinal fixation assembly can connect the clamping type fixing structure and the single-head fixing structure through the first connecting rod to adapt to the installation requirements of different vertebral bodies.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a single-head fixation structure, a double-head fixation structure, and a spinal internal fixation component. Background Technology

[0002] Patients with spinal tumors require internal fixation with screws after resection of the tumor and involved vertebrae. This, combined with anterior vertebral support structures such as artificial vertebrae, helps maintain the normal physiological curvature and function of the spine, bear the body's load, and ultimately achieve fixation and fusion. Designing a simple, easy-to-install, and stable fixation structure is a problem that needs to be solved by those skilled in the art. Summary of the Invention

[0003] In view of the shortcomings of the prior art described above, the technical problem solved by the present invention is to provide a single-head fixation structure, a double-head fixation structure, and a spinal internal fixation component that are simple in structure, easy to install, and structurally stable.

[0004] To achieve the above and other related objectives, the present invention provides a single-head fixing structure, comprising: two clamping rings, a first connecting rod, and a clamping screw;

[0005] The locking screw includes a locking screw body and a locking screw seat connected to the upper end of the locking screw body. The top surface of the locking screw seat is provided with an arc-shaped groove into which the first connecting rod can be inserted. The bottom surface of the locking screw seat includes a first side bottom surface, a middle bottom surface, and a second side bottom surface connected in sequence. The middle bottom surface is connected to the locking screw body. The first side bottom surface and the second side bottom surface are both arc-shaped structures with successively increasing radii towards the middle bottom surface. The first side bottom surface and the second side bottom surface have the same dimensions.

[0006] Each of the clamping rings is provided with an axial through hole for clamping. The wall of the axial through hole for clamping includes an upper hole wall and a lower hole wall connected to each other. The upper hole wall is an arc-shaped hole wall, and the diameter of the cross-section of the upper hole wall is less than or equal to the diameter of the first connecting rod. The cross-section of the lower hole wall is an arc-shaped hole wall, and the diameter of the cross-section of the lower hole wall increases sequentially along the axial direction of the lower hole wall.

[0007] When the first connecting rod is placed in the arc-shaped groove and the two clamping rings are respectively fitted onto the two ends of the clamping part nail seat, the end with the larger cross-sectional dimension of the lower hole wall of the clamping part axial through hole of each clamping ring is closer to the middle bottom surface; the upper hole walls of the two clamping rings press against the first connecting rod, and the two clamping rings are engaged with the first connecting rod; the lower hole walls of the two clamping rings press against the first side bottom surface and the second side bottom surface of the clamping part nail seat respectively, and the two clamping rings are engaged with the clamping part nail seat.

[0008] The present invention also relates to a spinal internal fixation component, comprising: a clip-type fixation structure and the aforementioned single-head fixation structure;

[0009] The latch-type fixing structure includes a latch screw and a latch component. The latch component includes a latch seat and a latch post connected to the lower end of the latch seat. The latch post is a frustum-shaped structure with dimensions decreasing from top to bottom. The latch seat has a latch mounting hole for inserting the first connecting rod. The latch post has a latch partition groove communicating with the latch mounting hole, which divides the latch post into two post blocks.

[0010] The locking screw includes a locking screw body and a locking screw seat connected to the top of the locking screw body. The top surface of the locking screw seat is provided with a locking groove for the locking pin to be inserted into. When the first connecting rod is inserted into the locking mounting hole and the locking pin is inserted into the locking groove, the locking mounting hole of the locking seat will lock the first connecting rod.

[0011] The first connecting rod passes sequentially through the mounting hole of the plug part of the plug seat and the arc-shaped groove of the clamping part nail seat of the single-head fixing structure. The mounting hole of the plug part of the plug seat clamps the first connecting rod, and the two clamping rings engage with the first connecting rod and the two clamping rings engage with the clamping part nail seat.

[0012] The present invention also relates to a double-headed fixing structure, comprising: a clamping base, a clamping insert, a second connecting rod, and the single-headed fixing structure;

[0013] The clamping insert includes an insert base and an insert post connected to the lower end of the insert base. The insert base has an insert hole into which the second connecting rod can be inserted. The insert post is a frustum-shaped structure with a cross-sectional dimension decreasing from top to bottom. The insert post has a column partition groove communicating with the insert hole, which divides the insert post into two insert bodies. The clamping base is connected to the locking pin seat of the single-head fixing structure. The clamping base has a clamping groove for the insert post to be inserted into, and the axial direction of the clamping groove is perpendicular to the axial direction of the arc-shaped groove of the locking pin seat.

[0014] As the second connecting rod is inserted into the insertion hole of the insertion seat, and the insertion post is inserted into the clamping groove, the insertion post is continuously closed under the pressure of the groove sidewall of the clamping groove, the column partition groove gradually decreases, and the pressure applied by the insertion hole of the insertion seat to the second connecting rod increases, so that the insertion hole of the insertion seat jams the second connecting rod.

[0015] The present invention also relates to a spinal internal fixation assembly, comprising: a clip-type fixation structure and a double-headed fixation structure as described above;

[0016] The latch-type fixing structure includes a latch screw and a latch component. The latch component includes a latch seat and a latch post connected to the lower end of the latch seat. The latch post is a frustum-shaped structure with dimensions decreasing from top to bottom. The latch seat has a latch mounting hole for inserting the second connecting rod. The latch post has a latch partition groove communicating with the latch mounting hole, which divides the latch post into two column blocks.

[0017] The locking screw includes a locking screw body and a locking screw seat connected to the top of the locking screw body. The top surface of the locking screw seat is provided with a locking groove for the locking pin to be engaged.

[0018] The second connecting rod is inserted into the mounting hole of the locking part of the locking seat. As the locking rod is inserted into the groove of the locking part, the locking rod is continuously closed under the pressure of the groove sidewall of the locking part groove. The locking part groove gradually decreases, and the pressure applied by the mounting hole of the locking part of the locking seat to the second connecting rod increases, so that the mounting hole of the locking part of the locking seat locks the second connecting rod.

[0019] The present invention also relates to a spinal internal fixation assembly, comprising: the single-headed fixation structure and the double-headed fixation structure; the first connecting rod of the single-headed fixation structure is connected to the second connecting rod of the double-headed fixation structure to form a series rod.

[0020] The present invention also relates to a spinal internal fixation component, comprising: a column clamping structure and the aforementioned double-headed fixation structure;

[0021] The column clamping structure includes a clamping member, a locking ring, and a clamping screw. The clamping member includes a clamping seat and a clamping post connected to the lower end of the clamping seat. The clamping post is cylindrical. The clamping seat has a clamping mounting hole for inserting a second connecting rod, and the clamping post has a clamping part partition groove communicating with the clamping mounting hole, which divides the clamping post into two column blocks. The clamping screw includes a clamping part nail body and a clamping part nail seat connected to the upper end of the clamping part nail body. The top surface of the clamping part nail seat has a groove for inserting the clamping post. The clamping part seat has an insertable mounting groove, and the outer surface of the clamping part nail seat is a frustum-shaped structure with dimensions decreasing from top to bottom. Along the circumference of the outer surface of the clamping part nail seat, multiple clamping part opening slots communicating with the clamping part seat mounting groove are provided, each clamping part opening slot extending to the upper end face of the clamping part nail seat. The locking ring has an axial through hole for the clamping part nail seat to be inserted, and the axial through hole is a frustum-shaped structure with dimensions decreasing from top to bottom. The diameter of the upper end of the outer surface of the clamping part nail seat is larger than the diameter of the upper end face of the axial through hole.

[0022] The second connecting rod passes through the clamping part mounting hole of the clamping seat, the locking ring is sleeved on the clamping part nail seat, the locking ring presses against the clamping part nail seat, and the clamping part nail seat presses against the clamping column, so that the clamping part mounting hole of the clamping seat locks the second connecting rod.

[0023] The present invention also relates to a spinal internal fixation assembly, comprising: a double-headed hinge structure and the double-headed fixation structure;

[0024] The double-headed hinge structure includes a double-headed hinge component, a clamping ring, and a hinge screw. The double-headed hinge component includes a hinge base and a hinge body connected to the lower end of the hinge base. The lower end face of the hinge body is spherical. The hinge base has a hinge mounting hole for inserting a second connecting rod. The hinge body has a hinge partition groove communicating with the hinge mounting hole, which divides the hinge body into two hinge blocks. The hinge screw includes a hinge pin body and a hinge pin seat connected to the upper end of the hinge pin body. The top surface of the hinge pin seat has a mounting hole for the hinge body. The hinge pin holder has an insertable spherical mounting groove, and its outer surface is a frustum-shaped structure with dimensions decreasing from top to bottom. Along the circumference of the outer surface of the hinge pin holder, multiple hinge opening slots communicating with the mounting groove are provided, each extending to the upper end face of the hinge pin holder. The clamping ring has an axial through hole for inserting the hinge pin holder, and the axial through hole is a frustum-shaped structure with dimensions decreasing from top to bottom. The diameter of the upper end of the outer surface of the hinge pin holder is larger than the diameter of the upper end face of the axial through hole.

[0025] The second connecting rod passes through the hinge mounting hole of the hinge seat, the clamping ring is sleeved on the hinge pin seat, the clamping ring presses against the hinge pin seat, and the hinge pin seat presses against the hinge body, so that the hinge mounting hole of the hinge seat locks the second connecting rod.

[0026] The present invention also relates to a spinal internal fixation assembly, comprising: a third connecting rod, a double-seat clamping structure, and the aforementioned double-headed fixation structure;

[0027] The dual-seat clamping structure includes a clamping part with a double groove, a positioning screw, a screw plug, a clamping part insert, and a positioning ball ring. The clamping part with a double groove includes a positioning seat and a clamping seat connected together. The upper part of the positioning seat has a downwardly recessed positioning groove, and the lower part of the positioning seat is connected to the positioning screw. The positioning groove has a positioning internal thread, which is threadedly connected to the screw plug. The positioning ball ring is inserted into the positioning groove, and the positioning ball ring is positioned above the positioning screw. The bottom surface of the positioning ball ring presses against the positioning screw. The third connecting rod presses against the top surface of the positioning ball ring.

[0028] The clamping insert includes an insert base and an insert post connected to the lower end of the insert base. The insert base has an insert hole for inserting a second connecting rod. The insert post is a frustum-shaped structure with a cross-sectional dimension decreasing from top to bottom. The insert post has a column partition groove communicating with the insert hole, which divides the insert post into two insert bodies. The clamping base has a clamping groove for the insert post to be engaged, and the axial direction of the clamping groove is parallel to the recessed direction of the positioning groove.

[0029] The second connecting rod passes through the insertion hole of the insertion seat of the double-body clamping structure, and the insertion hole of the insertion seat of the double-body clamping structure holds the second connecting rod in place;

[0030] The third connecting rod passes through the positioning groove of the double-seat clamping structure, and the screw plug can press down on the third connecting rod passing through the positioning groove.

[0031] The present invention also relates to a spinal internal fixation component, comprising: a third connecting rod, a double-seat snap-fit ​​structure, and the aforementioned double-headed fixation structure;

[0032] The dual-seat snap-fit ​​structure includes a snap-fit ​​double-groove seat, a fixing screw, a screw plug, a snap-fit ​​sleeve, and a fixing ball ring; the snap-fit ​​double-groove seat includes a fixed seat and a snap-fit ​​seat connected to each other; the upper part of the fixed seat is provided with a downwardly recessed receiving groove, and the lower part of the fixed seat is movably connected to the fixing screw; the receiving groove is provided with a receiving internal thread, the receiving internal thread is threadedly connected to the screw plug, the fixing ball ring is inserted into the receiving groove, the fixing ball ring is above the fixing screw, the bottom surface of the fixing ball ring presses against the fixing screw, and the third connecting rod presses against the top surface of the fixing ball ring;

[0033] The outer surface of the snap-fit ​​sleeve is a frustum-shaped structure. The snap-fit ​​sleeve is provided with an axial through hole for inserting the second connecting rod. The outer side of the snap-fit ​​sleeve is provided with a snap-fit ​​groove communicating with the axial through hole. The snap-fit ​​seat is provided with a slot for the snap-fit ​​sleeve to snap into. The recessed direction of the receiving groove is perpendicular to the axial direction of the slot.

[0034] The second connecting rod passes through the axial through hole of the snap-fit ​​part of the snap-fit ​​part sleeve of the double-seat snap-fit ​​structure, and the axial through hole of the snap-fit ​​part sleeve of the double-seat snap-fit ​​structure holds the second connecting rod in place.

[0035] The third connecting rod passes through the receiving groove of the double-seat snap-fit ​​structure, and the screw plug can press down the third connecting rod passing through the receiving groove.

[0036] As described above, the single-head fixation structure, double-head fixation structure, and spinal internal fixation assembly of the present invention have the following beneficial effects:

[0037] When using the single-head fixing structure of the present invention, the clamping rings are fitted onto the first connecting rod from both sides, and then the first connecting rod is placed into the arc-shaped groove of the clamping part nail seat. Two clamping rings are pushed in from both sides of the first connecting rod towards the center. As the two clamping rings gradually approach the clamping part screw, the friction between the clamping rings and the clamping part nail seat gradually increases, and the friction between the clamping rings and the first connecting rod also gradually increases. When the friction between the clamping rings and the clamping part nail seat finally increases to the point that the clamping rings and the clamping part nail seat reach a locked state, the clamping rings also simultaneously lock the first connecting rod. Thus, synchronous locking is achieved between the clamping rings and the clamping part nail seat, between the first connecting rod and the clamping rings, and between the first connecting rod and the arc-shaped groove of the clamping part nail seat. The single-head fixing structure of the present invention is easy to install, simple in structure, and stable. Attached Figure Description

[0038] Figure 1 This is a three-dimensional structural diagram showing the first connecting rod of Embodiment 1 being placed on the single-head fixing structure.

[0039] Figure 2The diagram shows the structure at the end face of the first connecting rod when the first connecting rod of Embodiment 1 is placed on the single-head fixing structure.

[0040] Figure 3 Displayed as Figure 2 A schematic diagram of the DD-direction cross-sectional structure.

[0041] Figure 4 The diagram shows a three-dimensional structure of the locking screw of the single-headed fixing structure in Example 1.

[0042] Figure 5 The diagram shows a three-dimensional structure of the clamping ring of the single-head fixing structure as shown in Example 1.

[0043] Figure 6 The diagram shows the end face structure of the clamping ring of the single-head fixing structure in Example 1.

[0044] Figure 7 The diagram shown is a three-dimensional structural schematic of the spinal internal fixation assembly of Example 1.

[0045] Figure 8 The diagram shown is a three-dimensional structural schematic of the clip-type fixing structure of Example 1.

[0046] Figure 9 The diagram shown is a structural schematic of the plug component of the plug-type fixing structure in Example 1.

[0047] Figure 10 The diagram shows a three-dimensional structure of the screw in the locking part of the locking structure as shown in Example 1.

[0048] Figure 11 The diagram shown is a three-dimensional structural schematic of the spinal internal fixation assembly of Example 2.

[0049] Figure 12 This is a three-dimensional structural diagram of the spinal internal fixation assembly of Embodiment 2 when the double-headed fixation structure is not equipped with a second connecting rod.

[0050] Figure 13 This is a three-dimensional structural diagram of the double-headed fixation structure of the spinal internal fixation component in Example 2 when no locking ring is provided.

[0051] Figure 14 The diagram shows a cross-sectional view of the double-headed fixation structure of the spinal internal fixation assembly in Example 2 when no locking ring is provided.

[0052] Figure 15 This is a schematic diagram of the clamping insert of the double-headed fixation structure of the spinal internal fixation assembly in Example 2.

[0053] Figure 16The diagram shown is a three-dimensional structural schematic of the spinal internal fixation assembly of Example 3.

[0054] Figure 17 The diagram shown is a three-dimensional structural schematic of the spinal internal fixation assembly of Example 4.

[0055] Figure 18 This is a schematic diagram of the structure at the end face of the first connecting rod when the second connecting rod of the spinal internal fixation assembly shown in Example 4 is inserted into the column clamping structure and the locking ring is at the lower end of the clamping part nail seat.

[0056] Figure 19 Displayed as Figure 18 A schematic diagram of the AA-direction cross-sectional structure.

[0057] Figure 20 This is a side view of the spinal internal fixation assembly of Example 4, showing the second connecting rod inserted into the column clamping structure and the locking ring located at the lower end of the clamping part nail seat.

[0058] Figure 21 Displayed as Figure 20 A schematic diagram of the BB-direction cross-sectional structure.

[0059] Figure 22 This is a schematic diagram showing the second connecting rod of the spinal internal fixation assembly of Example 4 being inserted into the column clamping structure, and the locking ring pressing against the clamping pin seat.

[0060] Figure 23 Displayed as Figure 22 A schematic diagram of the CC-direction cross-sectional structure.

[0061] Figure 24 This is a three-dimensional structural diagram of the clamping member of the column clamping structure of the spinal internal fixation assembly shown in Example 4.

[0062] Figure 25 This is a three-dimensional structural diagram of the clamping screw of the column clamping structure of the spinal internal fixation component shown in Example 4.

[0063] Figure 26 The diagram shows a three-dimensional structure of the locking ring of the column clamping structure of the spinal internal fixation component as shown in Example 4.

[0064] Figure 27 The diagram shown is a three-dimensional structural schematic of the spinal internal fixation assembly of Example 5.

[0065] Figure 28 The diagram shows a three-dimensional structure of the spinal internal fixation assembly of Example 5, in which the second connecting rod is inserted into the double-headed hinge structure and the clamping ring is located at the lower end of the hinge pin seat.

[0066] Figure 29 Displayed as Figure 28 A schematic diagram of the EE cross-sectional structure.

[0067] Figure 30 The diagram shows a three-dimensional structure of the spinal internal fixation assembly of Example 5, in which the second connecting rod is inserted into the double-headed hinge structure and the clamping ring clamps the hinge pin seat.

[0068] Figure 31 Displayed as Figure 30 A schematic diagram of the FF-direction cross-sectional structure.

[0069] Figure 32 This is a three-dimensional structural diagram showing the second connecting rod of the spinal internal fixation assembly of Example 5 being inserted into the double-headed hinge structure, and the double-headed hinge rotating and the clamping ring clamping the hinge pin seat.

[0070] Figure 33 Displayed as Figure 32 A schematic diagram of the GG-direction cross-sectional structure.

[0071] Figure 34 The diagram shows a three-dimensional structural schematic of the hinge screw of the double-headed hinge structure of the spinal internal fixation assembly of Example 5.

[0072] Figure 35 This is a three-dimensional structural diagram of the double-headed hinge structure of the spinal internal fixation assembly shown in Example 5.

[0073] Figure 36 The diagram shown is a three-dimensional structural schematic of the spinal internal fixation assembly of Example 6.

[0074] Figure 37 The diagram shows a three-dimensional structure of the dual-body clamping structure of the spinal internal fixation component in Example 6, in a disassembled state.

[0075] Figure 38 The diagram shows a cross-sectional view of the dual-body clamping structure of the spinal internal fixation assembly in Example 6, in an exploded state.

[0076] Figure 39 The diagram shown is a three-dimensional structural schematic of the dual-seat clamping structure of the spinal internal fixation component after installation, as shown in Example 6.

[0077] Figure 40 The diagram shows a three-dimensional structure of the double-groove clamping part of the double-seat clamping structure of the spinal internal fixation assembly of Example 6.

[0078] Figure 41 The diagram shows a three-dimensional view of the positioning ball ring of the dual-body clamping structure of the spinal internal fixation assembly as shown in Example 6.

[0079] Figure 42The diagram shown is a three-dimensional structural schematic of the spinal internal fixation assembly of Example 7.

[0080] Figure 43 The diagram shown is a three-dimensional structural schematic of the double-seat snap-fit ​​structure of the spinal internal fixation component in Example 7 when it is in a disassembled state.

[0081] Figure 44 The diagram shows a vertical cross-sectional view of the double-seat snap-fit ​​structure of the spinal internal fixation assembly in Example 7 when it is in a disassembled state.

[0082] Figure 45 The diagram shows a transverse cross-sectional view of the double-seat snap-fit ​​structure of the spinal internal fixation assembly in Example 7 when it is in a disassembled state.

[0083] Figure 46 The diagram shown is a three-dimensional structural schematic of the double-seat snap-fit ​​structure of the spinal internal fixation component after installation, as shown in Example 7.

[0084] Figure 47 The diagram shown is a transverse cross-sectional view of the double-seat snap-fit ​​structure of the spinal internal fixation assembly after installation, as shown in Example 7.

[0085] Figure 48 This is a three-dimensional structural diagram of the double-groove seat of the double-seat snap-fit ​​structure of the spinal internal fixation assembly shown in Example 7.

[0086] Figure 49 This is a three-dimensional structural diagram of the locking sleeve of the double-seat locking structure of the spinal internal fixation component shown in Example 7.

[0087] Figure 50 The diagram shown is a three-dimensional structural schematic of the spinal internal fixation assembly of Example 8.

[0088] Figure 51 The diagram shown is a three-dimensional structural schematic of the spinal internal fixation assembly of Example 9.

[0089] Figure 52 This is a schematic diagram showing the initial state of the double-headed fixing structure of Embodiment 2, with the insertion post inserted into the clamping groove and not engaged with it.

[0090] Figure 53 This is a schematic diagram showing the double-headed fixing structure of Example 2 with the insertion post in a locked state and the insertion post inserted into the clamping groove.

[0091] Explanation of icon numbers

[0092] 110 First connecting rod

[0093] 120 Second connecting rod

[0094] 130 Third connecting rod

[0095] 140 series rods

[0096] 200 column clamping structure

[0097] 210 Clamping component

[0098] 211 Clamping base

[0099] 212 Clamping Post

[0100] 213 Clamping part mounting hole

[0101] 214 Clamping Part Spacing

[0102] 215 Columnar Block

[0103] 220 Locking Ring

[0104] 221 Axial through hole of ring body

[0105] 230 Clamping screw

[0106] 231 Clamping part nail body

[0107] 232 Clamping part pin seat

[0108] 233 Clamping part mounting slot

[0109] 234 Clamping part opening groove

[0110] 300 Single-head fixed structure

[0111] 310 Clamping Ring

[0112] 311 Axial through hole of clamping part

[0113] 312 Upper hole wall

[0114] 313 Lower hole wall

[0115] 314 Hole Wall Extension

[0116] 320 clamping screw

[0117] 321 Clamping part nail body

[0118] 322 Clamping Pin Seat

[0119] 323 Arc-shaped groove

[0120] 324 First side bottom surface

[0121] 325 Middle bottom surface

[0122] 326 Second side bottom surface

[0123] 400 Double-headed hinge structure

[0124] 410 Double-headed hinge

[0125] 411 Hinge base

[0126] 412 Hinge

[0127] 413 Spherical surface

[0128] 414 Hinge mounting hole

[0129] 415 Hinge section groove

[0130] 416 Hinge Block

[0131] 420 clamping ring

[0132] 421 Axial through hole in the ring

[0133] 430 Hinge screw

[0134] 431 Hinge nail body

[0135] 432 Hinge pin seat

[0136] 433 Hinge Part Seat Mounting Slot

[0137] 434 Hinge joint opening groove

[0138] 500 Dual-seat clamping structure

[0139] 510 Clamping Part Double Slot Seat

[0140] 511 Positioning Seat

[0141] 512 Clamping base

[0142] 513 Positioning slot

[0143] 514 Positioning internal thread part

[0144] 515 Clamping slot

[0145] 516 Positioning Base

[0146] 517 Positioning Pin Arm

[0147] 518 Positioning Ball Groove

[0148] 520 positioning screw

[0149] 521 Positioning nail body

[0150] 522 Positioning nail head

[0151] 530 screw plug

[0152] 540 Clamping part insert

[0153] 541 Insert socket

[0154] 542 Insertion column

[0155] 543 Insertion Hole

[0156] 544 Columnar partition groove

[0157] 545 Insertion

[0158] 550 positioning ball ring

[0159] 560 Positioning Block

[0160] 600 Double-seat snap-fit ​​structure

[0161] 610 Double-slot connector

[0162] 611 Fixture

[0163] 612 Card Connector

[0164] 613 Receiving groove

[0165] 614 Receiver of internal thread section

[0166] 615 Card Slot

[0167] 6151 First groove end

[0168] 6152 Second groove end

[0169] 616 Fixed base

[0170] 617 Fixed nail arm

[0171] 618 Fixed ball groove

[0172] 620 fixing screw

[0173] 621 Fixing nail body

[0174] 622 Fixing nail head

[0175] 630 Connecting Sleeve

[0176] 631 Axial through hole of the snap-fit ​​part

[0177] 632 Snap-fit ​​Part Spacing

[0178] 633 Snap-fit ​​Body

[0179] 634 Insertion end

[0180] 635 Installation Terminal

[0181] 640 Fixed Ball Ring

[0182] 650 Fixed blocking part

[0183] 700 Double-headed fixing structure

[0184] 900 Snap-fit ​​Fixing Structure

[0185] 910 Snap-in Screw

[0186] 911 Cappette nail body

[0187] 912 Caliper Pin Seat

[0188] 913 Socket groove

[0189] 914 Pin seat flange

[0190] 920 cartridge

[0191] 921 cassette

[0192] 922 Plug

[0193] 923 Plug mounting hole

[0194] 924 Clog Partial Divider

[0195] 925 column block Detailed Implementation

[0196] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0197] Please refer to the accompanying drawings. It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of the invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of the invention, should still fall within the scope of the disclosed technical content. Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and are not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention.

[0198] Example 1

[0199] like Figures 1 to 6As shown, the single-head fixing structure 300 of this embodiment includes: two clamping rings 310, a first connecting rod 110 and a clamping screw 320;

[0200] The locking screw 320 includes a locking screw body 321 and a locking screw seat 322 connected to the upper end of the locking screw body 321. The top surface of the locking screw seat 322 is provided with an arc-shaped groove 323 into which the first connecting rod 110 can be inserted. The bottom surface of the locking screw seat 322 includes a first side bottom surface 324, a middle bottom surface 325, and a second side bottom surface 326 connected in sequence. The middle bottom surface 325 is connected to the locking screw body 321. The first side bottom surface 324 and the second side bottom surface 326 are both arc-shaped structures with successively increasing radii towards the middle bottom surface 325. The first side bottom surface 324 and the second side bottom surface 326 have the same dimensions.

[0201] Each of the clamping rings 310 is provided with an axial through hole 311 for clamping. The wall of the axial through hole 311 includes an upper hole wall 312 and a lower hole wall 313 connected to each other. The upper hole wall 312 is an arc-shaped hole wall, and the diameter of the cross-section of the upper hole wall 312 is less than or equal to the diameter of the first connecting rod 110. The cross-section of the lower hole wall 313 is arc-shaped, and the diameter of the cross-section of the lower hole wall 313 increases sequentially along the axial direction of the lower hole wall 313. Along the axial direction of the upper hole wall 312, the cross-sectional dimensions of the upper hole wall 312 are the same. The axial direction of the upper hole wall 312 is the same as the axial direction of the axial through hole 311 for clamping, and the axial direction of the lower hole wall 313 is the same as the axial through hole 311 for clamping.

[0202] When the first connecting rod 110 is placed in the arc-shaped groove 323, and the two clamping rings 310 are respectively fitted onto both ends of the clamping part nail seat 322, in the two ends of the clamping part axial through hole 311 of each clamping ring 310, the end with the larger cross-sectional dimension of the lower hole wall 313 of the clamping part axial through hole 311 is closer to the middle bottom surface 325; the upper hole walls 312 of the two clamping rings 310 press against the first connecting rod 110, and the two clamping rings 310 are engaged with the first connecting rod 110; the lower hole walls 313 of the two clamping rings 310 press against the first side bottom surface 324 and the second side bottom surface 326 of the clamping part nail seat 322, and the two clamping rings 310 are engaged with the clamping part nail seat 322.

[0203] In this embodiment, when the single-head fixing structure 300 is in use, the clamping rings 310 are slipped onto the connecting rod from both sides of the first connecting rod 110, and then the connecting rod is placed into the arc-shaped groove 323 of the clamping part nail seat 322. Two clamping rings 310 are pushed in from both sides of the first connecting rod 110 towards the center. The two clamping rings 310 move along the first side bottom surface 324 and the second side bottom surface 326 of the clamping part nail seat 322 towards the central axis of the clamping part screw 320. The upper hole wall 312 of the clamping rings 310 is always in contact with the first connecting rod 110. As the two clamping rings 310 gradually move closer to the clamping part screw 320, the friction between the lower hole wall 313 of the clamping rings 310 and the clamping part nail seat 322 gradually increases, and the friction between the upper hole wall 312 of the clamping rings 310 and the first connecting rod 110 also gradually increases. When the friction between the lower hole wall 313 of the locking ring 310 and the locking pin seat 322 eventually increases to the point that the locking ring 310 and the locking pin seat 322 are locked together, the upper hole wall 312 of the locking ring 310 also simultaneously locks the first connecting rod 110. Thus, synchronous locking is achieved between the locking ring 310 and the locking pin seat 322, between the first connecting rod 110 and the locking ring 310, and between the first connecting rod 110 and the arc-shaped groove 323 of the locking pin seat 322.

[0204] To make the structure more compact, the axial direction of the arc-shaped groove 323 is perpendicular to the axial direction of the clamping screw 320, and the length direction of the clamping pin seat 322 is in the same direction as the axial direction of the arc-shaped groove 323; the arc-shaped groove 323 extends to both ends of the length direction of the clamping pin seat 322.

[0205] For vertebrae that do not require angle adjustment during installation and have limited installation space in the axial direction of the clamping screw 320, a single-head fixing structure 300 can be installed on the vertebrae.

[0206] To ensure a stable engagement between the lower hole wall 313 of the locking ring 310 and the locking pin seat 322, the diameter of the larger end of the lower hole wall 313 is smaller than the diameter of the larger end of the first side bottom surface 324, and the diameter of the larger end of the lower hole wall 313 is smaller than the diameter of the larger end of the second side bottom surface 326. The axial through hole 311 of one locking ring 310 engages with the first side bottom surface 324 of the locking pin seat 322, and the axial through hole 311 of the other locking ring 310 engages with the second side bottom surface 326 of the locking pin seat 322. The lower ends of the upper hole wall 312 are connected to the lower hole wall 313 via hole wall extensions 314.

[0207] like Figures 1 to 10 As shown, the spinal internal fixation assembly of this embodiment includes: a clip-type fixation structure 900 and a single-head fixation structure 300;

[0208] The latch-type fixing structure 900 includes a latch screw 910 and a latch component 920. The latch component 920 includes a latch seat 921 and a latch post 922 connected to the lower end of the latch seat 921. The latch post 922 is a frustum-shaped structure with dimensions decreasing from top to bottom. The latch seat 921 is provided with a latch mounting hole 923 for inserting the first connecting rod 110. The latch post 922 is provided with a latch part partition groove 924 communicating with the latch mounting hole 923, which divides the latch post 922 into two post blocks 925.

[0209] The locking screw 910 includes a locking screw body 911 and a locking screw seat 912 connected to the top of the locking screw body 911. The top surface of the locking screw seat 912 is provided with a locking groove 913 for the locking pin 922 to be inserted into. When the first connecting rod 110 is inserted into the locking mounting hole 923 and the locking pin 922 is inserted into the locking groove 913, the locking mounting hole 923 of the locking seat 921 locks the first connecting rod 110.

[0210] The first connecting rod 110 passes sequentially through the plug mounting hole 923 of the plug seat 921 and the arc-shaped groove 323 of the clamping nail seat 322 of the single-head fixing structure 300. The plug mounting hole 923 of the plug seat 921 clamps the first connecting rod 110, and the two clamping rings 310 engage with the first connecting rod 110 and the two clamping rings 310 engage with the clamping nail seat 322.

[0211] When the first connecting rod 110 is installed on the latch-type fixing structure 900, the first connecting rod 110 is first inserted into the latch mounting hole 923 of the latch seat 921, and then the latch post 922 with the latch partition groove 924 is inserted into the latch groove 913 of the latch nail seat 912. As the latch post 922 gradually extends into the latch groove 913, the latch post 922, which is divided into two column blocks 925 by the latch partition groove 924, gradually closes, and the friction between the latch post 922 and the latch groove 913 of the latch nail seat 912 gradually increases, thus locking the latch. As the width of the partition groove 924 gradually decreases, the friction between the first connecting rod 110 and the mounting hole 923 of the locking seat 921 increases accordingly. When the friction between the locking pin 922 and the locking groove 913 of the locking pin seat 912 finally increases to the point that the locking pin 922 and the locking pin seat 912 are locked together, the mounting hole 923 of the locking seat 921 also clamps the first connecting rod 110 at the same time. Thus, synchronous locking is achieved between the locking pin 922 and the locking pin seat 912, and between the first connecting rod 110 and the clamping insert 540.

[0212] To facilitate the insertion of the plug 922 into the plug groove 913, the plug groove 913 is a frustum-shaped structure with the cross-sectional dimensions decreasing from top to bottom; the plug 922 is also a frustum-shaped structure with the cross-sectional dimensions decreasing from top to bottom; the diameter of the upper end of the plug 922 is larger than the diameter of the upper end of the plug groove 913.

[0213] To facilitate the installation of the locking screw 910 of the locking type fixing structure 900 onto the cone body, a screw seat flange 914 with an octagonal structure is provided on the outer peripheral surface of the screw seat 912 of the locking type fixing structure 900. The screw seat flange 914 facilitates connection with an octagonal tool, which is beneficial for quick installation. The locking type fixing structure 900 is easy to install and remove.

[0214] For vertebrae where angle adjustment is required during installation and where the installation space along the axial direction of the locking screw 910 is small, a locking-type fixation structure 900 can be installed on the vertebrae. In this embodiment, the spinal internal fixation assembly can connect the locking-type fixation structure 900 and the single-head fixation structure 300 in series via a first connecting rod to accommodate the installation requirements of different vertebrae.

[0215] Example 2

[0216] like Figures 11 to 15 , Figure 52 and Figure 53 As shown, the double-headed fixing structure 700 of this embodiment includes: a clamping base 512, a clamping part insert 540, a second connecting rod 120, and a single-headed fixing structure 300.

[0217] The clamping insert 540 includes an insert base 541 and an insert post 542 connected to the lower end of the insert base 541. The insert base 541 is provided with an insert hole 543 for the second connecting rod 120 to be inserted. The insert post 542 is a frustum-shaped structure with the cross-sectional dimensions decreasing from top to bottom. The insert post 542 is provided with a column partition groove 544 communicating with the insert hole 543. The column partition groove 544 divides the insert post 542 into two insert bodies 545. The clamping base 512 is connected to the clamping nail seat 322 of the single-head fixing structure 300. The clamping base 512 is provided with a clamping groove 515 for the insert post 542 to be inserted into. The axial direction of the clamping groove 515 is perpendicular to the axial direction of the arc-shaped groove 323 of the clamping nail seat 322.

[0218] The second connecting rod 120 is inserted into the insertion hole 543 of the insertion seat 541. During the process of the insertion post 542 being inserted into the clamping groove 515, the two insertion bodies 545 of the insertion post 542 are continuously closed under the pressure of the groove sidewall of the clamping groove 515. The column body partition groove 544 gradually decreases, and the pressure applied by the insertion hole 543 of the insertion seat 541 to the second connecting rod 120 increases, so that the insertion hole 543 of the insertion seat 541 jams the second connecting rod 120.

[0219] When the second connecting rod 120 is installed on the double-headed fixing structure 700, the second connecting rod 120 is first inserted into the insertion hole 543 of the insertion seat 541, and then the insertion post 542 with the column dividing groove 544 is inserted into the clamping groove 515 of the clamping seat 512. As the insertion post 542 gradually enters the clamping groove 515, the two insertion bodies 545 of the insertion post 542 continuously close under the pressure of the groove sidewall of the clamping groove 515, and the column dividing groove 544 gradually decreases. At the same time, the locking pressure applied by the insertion hole 543 of the insertion seat 541 to the second connecting rod 120 gradually increases. As the insertion post 542 continuously enters the clamping groove 515, the pressure and friction between the insertion post 542 and the groove sidewall of the clamping groove 515 gradually increase. The closing process of the two inserts 545 of the insert post 542 and the process of the insert post 542 being gradually pressed into the clamping groove 515 are related to each other but have no independent termination position. That is, before the size of the column partition groove 544 becomes 0, the insert post 542 can be continuously inserted into the clamping groove 515. As a result, the reduction of the column partition groove 544 causes the insert post 542 to be further inserted into the clamping groove 515 until there is no more space for movement in either process, which reaches the maximum locking force of the insertion hole 543 to lock the second connecting rod 120.

[0220] When the insertion post 542 and the clamping seat 512 are locked, the insertion hole 543 of the insertion seat 541 also clamps the second connecting rod 120 at the same time. Thus, synchronous locking is achieved between the insertion seat 541 and the insertion post 542, and between the second connecting rod 120 and the clamping part insertion 540.

[0221] To facilitate the insertion of the insertion post 542 into the clamping groove 515, the clamping groove 515 is a frustum-shaped structure with the cross-sectional dimensions decreasing from top to bottom; the insertion post 542 is a frustum-shaped structure with the cross-sectional dimensions decreasing from top to bottom; the diameter of the upper end of the insertion post 542 is larger than the diameter of the upper end of the clamping groove 515.

[0222] The spinal internal fixation assembly of this embodiment includes: a clip-type fixation structure 900 and a double-headed fixation structure 700;

[0223] The latch-type fixing structure 900 includes a latch screw 910 and a latch component 920. The latch component 920 includes a latch seat 921 and a latch post 922 connected to the lower end of the latch seat 921. The latch post 922 is a frustum-shaped structure with dimensions decreasing from top to bottom. The latch seat 921 is provided with a latch mounting hole 923 for inserting the second connecting rod 120. The latch post 922 is provided with a latch part partition groove 924 communicating with the latch mounting hole 923, which divides the latch post 922 into two post blocks 925.

[0224] The locking screw 910 includes a locking screw body 911 and a locking screw seat 912 connected to the top of the locking screw body 911. The top surface of the locking screw seat 912 is provided with a locking groove 913 for the locking pin 922 to be inserted into.

[0225] The second connecting rod 120 is inserted into the plug mounting hole 923 of the plug seat 921. During the process of the plug pin 922 being inserted into the plug groove 913, the plug pin 922 is continuously closed under the pressure of the groove sidewall of the plug groove 913. The plug groove 924 gradually decreases, and the pressure applied by the plug mounting hole 923 of the plug seat 921 to the second connecting rod 120 increases, so that the plug mounting hole 923 of the plug seat 921 locks the second connecting rod 120.

[0226] The second connecting rod 120 is first inserted into the locking part mounting hole 923 of the locking part seat 921. Then, the locking pin 922, which has a locking part partition groove 924, is inserted into the locking part groove 913 of the locking part nail seat 912. As the locking pin 922 gradually engages with the locking part groove 913, the two pin blocks 925 of the locking pin 922 continuously close under the pressure of the groove sidewall of the locking part groove 913, and the locking part partition groove 924 gradually decreases. At the same time, the locking rod pressure applied by the locking part mounting hole 923 of the locking part seat 921 to the second connecting rod 120 gradually increases. As the locking pin 922 continuously enters the locking part groove 913, the pressure and friction between the locking pin 922 and the groove sidewall of the locking part groove 913 gradually increase. The closing process of the two pillar blocks 925 of the latch 922 and the process of the latch 922 gradually being pressed into the latch groove 913 are related to each other but have no independent termination position. That is, before the size of the latch groove 924 becomes 0, the latch 922 can continuously insert into the latch groove 913. As a result, the reduction of the latch groove 924 causes the latch 922 to be further inserted into the latch groove 913 until there is no more room for movement in either process, which reaches the maximum locking force of the latch mounting hole 923 to lock the second connecting rod 120.

[0227] The second connecting rod 120 passes through the plug mounting hole 923 of the plug seat 921 and the insertion hole 543 of the insertion seat 541 of the double-headed fixing structure 700 in sequence. The plug mounting hole 923 of the plug seat 921 holds the second connecting rod 120 in place, and the insertion hole 543 of the insertion seat 541 of the double-headed fixing structure 700 holds the second connecting rod 120 in place.

[0228] When the first connecting rod 110 is placed on the arc-shaped groove 323 of the single-head fixing structure 300, the two clamping rings 310 are respectively sleeved on both ends of the clamping part nail seat 322, the inner walls of the two clamping rings 310 press against the first connecting rod 110, and the inner walls of the two clamping rings 310 are engaged with the clamping part nail seat 322.

[0229] The spinal internal fixation assembly with a double-headed fixation structure 700 can connect the first connecting rod 110 and the second connecting rod 120.

[0230] Example 3

[0231] like Figures 1 to 6 ,like Figures 12 to 16 As shown, the spinal internal fixation assembly of this embodiment includes: a single-head fixation structure 300 and a double-head fixation structure 700;

[0232] The first connecting rod 110 of the single-headed fixing structure 300 is connected to the second connecting rod 120 of the double-headed fixing structure 700 to form a series rod 140.

[0233] Example 4

[0234] like Figures 17 to 26 ,like Figures 1 to 6 ,like Figures 12 to 15 As shown, the spinal internal fixation assembly of this embodiment includes: a column clamping structure 200 and a double-headed fixation structure 700;

[0235] The column clamping structure 200 includes a clamping member 210, a locking ring 220, and a clamping screw 230. The clamping member 210 includes a clamping seat 211 and a clamping column 212 connected to the lower end of the clamping seat 211. The clamping column 212 is cylindrical. The clamping seat 211 has a clamping mounting hole 213 for inserting a second connecting rod 120. The clamping column 212 has a clamping part partition groove 214 communicating with the clamping mounting hole 213, which divides the clamping column 212 into two column blocks 215. The clamping screw 230 includes a clamping nail body 231 and a clamping nail seat 232 connected to the upper end of the clamping nail body 231. The top of the clamping nail seat 232... The surface is provided with a clamping part seat mounting groove 233 for inserting the clamping post 212. The outer side of the clamping part nail seat 232 is a frustum-shaped structure with the size decreasing from top to bottom. Along the circumference of the outer side of the clamping part nail seat 232, there are multiple clamping part opening grooves 234 communicating with the clamping part seat mounting groove 233. Each clamping part opening groove 234 extends to the upper end face of the clamping part nail seat 232. The locking ring 220 is provided with an axial through hole 221 for inserting the clamping part nail seat 232. The axial through hole 221 is a frustum-shaped structure with the size decreasing from top to bottom. The diameter of the upper end of the outer side of the clamping part nail seat 232 is larger than the diameter of the upper end face of the axial through hole 221.

[0236] The second connecting rod 120 passes through the clamping part mounting hole 213 of the clamping seat 211, and the locking ring 220 is sleeved on the clamping part nail seat 232. The locking ring 220 presses down on the clamping part nail seat 232, and the clamping part nail seat 232 presses down on the clamping post 212, so that the clamping part mounting hole 213 of the clamping seat 211 holds the second connecting rod 120 in place.

[0237] When the column clamping structure 200 is in use, the second connecting rod 120 is inserted into the clamping part mounting hole 213 of the clamping seat 211, and the clamping column 212 with the clamping part partition groove 214 is inserted into the clamping part seat mounting groove 233 of the clamping part nail seat 232. When the locking ring 220 is fitted at the bottom of the clamping part nail seat 232 and the clamping column 212 is inserted into the clamping part seat mounting groove 233, the locking ring 220 is lifted upward along the axial direction of the clamping part nail seat 232. During the lifting process, the pressure of the axial through hole 221 of the frustum-shaped ring of the locking ring 220 on the clamping part nail seat 232 gradually increases, forcing the clamping part nail seat 232 to deform inward. The clamping part nail seat 232 then presses inward to divide the clamped part partition groove 214 into two column parts. As the clamping post 212 of block 215 gradually closes, the friction between the clamping post 212 and the clamping part seat mounting groove 233 gradually increases, the width of the clamping part partition groove 214 gradually decreases, and the friction between the second connecting rod 120 and the clamping part mounting hole 213 of the clamping seat 211 increases accordingly. When the friction between the clamping post 212 and the clamping part seat mounting groove 233 finally increases to the point that the clamping post 212 and the clamping part nail seat 232 reach a locked state, the clamping part mounting hole 213 of the clamping seat 211 also simultaneously clamps the second connecting rod 120. Thus, synchronous locking is achieved between the locking ring 220 and the clamping part nail seat 232, between the clamping part screw 230 and the clamping member 210, and between the second connecting rod 120 and the clamping member 210. In this embodiment, the clamping part opening groove 234 facilitates the insertion of the clamping post 212 into the clamping part seat mounting groove 233.

[0238] In the column clamping structure 200, the central axis of the clamping part mounting hole 213 is perpendicular to the central axis of the clamping column 212. The cross-section of the clamping part mounting hole 213 is circular, and the diameter of the cross-section of the clamping part mounting hole 213 is larger than the diameter of the cross-section of the second connecting rod 120. The cross-section of the clamping part seat mounting groove 233 is also circular. This structure facilitates the installation of the clamping column 212 and the second connecting rod 120 and is easy to manufacture.

[0239] In order to facilitate the insertion of the second connecting rod 120 into the mounting hole 213 of the clamping part, the clamping part groove 214 in the column clamping structure 200 extends along the axial direction of the clamping column 212.

[0240] For cones that require angle adjustment during installation and have a large installation space in the axial direction of the clamping screw 230, the column clamping structure 200 can be installed on the cone. The clamping member 210 can rotate in the clamping nail seat 232 of the clamping screw 230. Therefore, the column clamping structure 200 has a greater degree of freedom than the single-head fixing structure 300.

[0241] Example 5

[0242] like Figures 27 to 35 ,like Figures 1 to 6 ,like Figures 12 to 15 As shown, the spinal internal fixation assembly of this embodiment includes: a double-headed hinge structure 400 and a double-headed fixation structure 700;

[0243] The double-headed hinge structure 400 includes a double-headed hinge member 410, a clamping ring 420, and a hinge screw 430. The double-headed hinge member 410 includes a hinge seat 411 and a hinge body 412 connected to the lower end of the hinge seat 411. The lower end surface of the hinge body 412 is a spherical surface 413. The hinge seat 411 is provided with a hinge mounting hole 414 for inserting a second connecting rod 120. The hinge body 412 is provided with a hinge portion partition groove 415 communicating with the hinge mounting hole 414, which divides the hinge body 412 into two hinge blocks 416. The hinge screw 430 includes a hinge pin body 431 and a hinge pin seat 432 connected to the upper end of the hinge pin body 431. The top surface of component 2 is provided with a spherical hinge seat mounting groove 433 into which the hinge body 412 can be inserted. The outer side of the hinge pin seat 432 is a frustum-shaped structure with the size decreasing from top to bottom. Along the circumference of the outer side of the hinge pin seat 432, there are multiple hinge opening grooves 434 communicating with the hinge seat mounting groove 433. Each hinge opening groove 434 extends to the upper end face of the hinge pin seat 432. The clamping ring 420 is provided with an axial through hole 421 for the hinge pin seat 432 to be inserted. The axial through hole 421 is a frustum-shaped structure with the size decreasing from top to bottom. The diameter of the upper end of the outer side of the hinge pin seat 432 is larger than the diameter of the upper end face of the axial through hole 421.

[0244] The second connecting rod 120 passes through the hinge mounting hole 414 of the hinge seat 411. The clamping ring 420 is sleeved on the hinge pin seat 432. The clamping ring 420 presses down on the hinge pin seat 432, and the hinge pin seat 432 presses down on the hinge body 412, so that the hinge mounting hole 414 of the hinge seat 411 holds the second connecting rod 120 in place.

[0245] In this embodiment, when using the double-headed hinge structure 400, the second connecting rod 120 is inserted into the hinge mounting hole 414 of the hinge seat 411, and the hinge body 412 with the hinge partition groove 415 is inserted into the hinge seat mounting groove 433 of the hinge pin seat 432. When the clamping ring 420 is fitted at the bottom of the hinge pin seat 432 and the hinge body 412 is inserted into the hinge partition groove 415, the clamping ring 420 is lifted upward along the axial direction of the hinge pin seat 432. During the lifting process, the pressure of the axial through hole 221 of the frustum-shaped ring body of the clamping ring 420 on the hinge pin seat 432 gradually increases, forcing the hinge pin seat 432 to deform inward. The hinge pin seat 432 is then pressed inward and divided into two hinges by the hinge partition groove 415. As the hinge body 412 of block 416 gradually closes, the friction between the hinge body 412 and the hinge seat mounting groove 433 gradually increases, the width of the hinge part partition groove 415 gradually decreases, and the friction between the second connecting rod 120 and the hinge part mounting hole 414 of the hinge seat 411 increases accordingly. When the friction between the hinge body 412 and the hinge seat mounting groove 433 finally increases to the point that the hinge body 412 and the hinge part nail seat 432 reach a locked state, the hinge part mounting hole 414 of the hinge seat 411 also clamps the second connecting rod 120 at the same time. Thus, synchronous locking is achieved between the clamping ring 420 and the hinge part nail seat 432, between the hinge part screw 430 and the double-headed hinge 410, and between the second connecting rod 120 and the double-headed hinge 410. In this embodiment, the hinge opening slot 434 facilitates the insertion of the hinge body 412 into the hinge seat mounting slot 433.

[0246] In order to facilitate the insertion of the second connecting rod 120 into the hinge mounting hole 414, in the double-headed hinge structure 400, the hinge part groove 415 extends along the vertical direction of the hinge body 412.

[0247] For a vertebra that requires angle adjustment during installation, a double-headed hinge structure 400 can be installed on the vertebra. The hinge body 412 can rotate in the hinge seat mounting groove 433, so that the degree of freedom of the double-headed hinge structure 400 is greater than that of the column clamping structure 200.

[0248] Example 6

[0249] like Figures 36 to 41 ,like Figures 1 to 6 ,like Figures 12 to 15 As shown, the spinal internal fixation assembly of this embodiment includes: a third connecting rod 130, a double-seat clamping structure 500, and a double-headed fixation structure 700.

[0250] The dual-seat clamping structure 500 includes a clamping part double-groove seat 510, a positioning screw 520, a screw plug 530, a clamping part insert 540, and a positioning ball ring 550. The clamping part double-groove seat 510 includes a positioning seat 511 and a locking screw seat 912 connected to each other. The upper part of the positioning seat 511 is provided with a downwardly recessed positioning groove 513, and the lower part of the positioning seat 511 is connected to the positioning screw 520. The positioning groove 513 is provided with a positioning internal thread 514, which is threadedly connected to the screw plug 530. The positioning ball ring 550 is inserted into the positioning groove 513, and the positioning ball ring 550 is positioned above the positioning screw 520. The bottom surface of the positioning ball ring 550 presses against the positioning screw 520. The third connecting rod 120 presses against the top surface of the positioning ball ring 550.

[0251] The clamping insert 540 includes an insert seat 541 and an insert post 542 connected to the lower end of the insert seat 541. The insert seat 541 is provided with an insert hole 543 into which the second connecting rod 120 can be inserted. The insert post 542 is a frustum-shaped structure with the cross-sectional dimensions decreasing from top to bottom. The insert post 542 is provided with a column partition groove 544 communicating with the insert hole 543. The column partition groove 544 divides the insert post 542 into two insert bodies 545. The latching nail seat 912 is provided with a clamping groove 515 for the insert post 542 to be inserted into. The axial direction of the clamping groove 515 is parallel to the recessed direction of the positioning groove 513.

[0252] The second connecting rod 120 passes through the insertion hole 543 of the insertion seat 541 of the double-seat clamping structure 500, and the insertion hole 543 of the insertion seat 541 of the double-seat clamping structure 500 holds the second connecting rod 120 in place.

[0253] The third connecting rod 130 passes through the positioning groove 513 of the double-seat clamping structure 500, and the screw plug 530 can press down the third connecting rod 130 that passes through the positioning groove 513.

[0254] In the dual-body clamping structure 500, the positioning groove 513 penetrates the positioning seat 511 radially. The positioning seat 511 includes a positioning base 516 and a positioning upper arm disposed on the upper end of the positioning base 516. The positioning upper arm includes two opposing positioning pin arms 517 respectively located on both sides of the positioning groove 513. The positioning screw 520 includes a positioning pin body 521 and a positioning pin head 522 connected to the upper end of the positioning pin body 521. The positioning base 516 is provided with a positioning ball groove 518 for the positioning pin head 522 to be inserted. A positioning ball ring 550 is located above the positioning pin head 522, and the bottom surface of the positioning ball ring 550 presses against the positioning pin head 522. The third connecting rod 130 presses against the top surface of the positioning ball ring 550. Each positioning pin arm 517 is arc-shaped; the positioning base 516 is cylindrical; a vertical plane passing through the central axis of the positioning base 516 and equidistant from the two positioning pin arms 517 is the intermediate plane; the two positioning pin arms 517 are symmetrically arranged with the intermediate plane as their central axis. A positioning blocking part 560 is provided on the inner side of the upper positioning arm, located between the internal positioning thread 514 and the positioning ball groove 518. The positioning blocking part 560 is used to prevent the positioning ball ring 550 from moving outward.

[0255] In this embodiment, when the dual-body clamping structure 500 is used, the third connecting rod 130 is inserted into the positioning groove 513 in the positioning seat 511, and the screw plug 530 is used to press the third connecting rod 130 onto the positioning ball ring 550. The positioning ball ring 550 presses against the positioning pin head 522 of the positioning screw 520. When the pressure generated by the screw plug 530 further increases, the third connecting rod 130, the positioning ball ring 550, and the positioning pin head 522 of the positioning screw 520 can be locked. The second connecting rod 120 is first inserted into the insertion hole 543 of the insertion seat 541, and then the insertion post 542 with the column partition groove 544 is inserted into the clamping groove 515 of the clamping seat 512. As the insertion post 542 gradually extends into the clamping groove 515, it is... As the column partition groove 544 divides into two inserts 545, the insert post 542 gradually closes, the friction between the insert post 542 and the clamping groove 515 of the clamping seat 512 gradually increases, the width of the column partition groove 544 gradually decreases, and the friction between the second connecting rod 120 and the insertion hole 543 of the insert seat 541 increases accordingly. When the friction between the insert post 542 and the clamping groove 515 of the clamping seat 512 finally increases to the point that the insert post 542 and the clamping seat 512 are locked together, the insertion hole 543 of the insert seat 541 also clamps the second connecting rod 120 at the same time. Thus, the clamping seat 512 and the clamping part insert 540, as well as the second connecting rod 120 and the clamping part insert 540, are synchronously locked together.

[0256] To facilitate the insertion of the insertion post 542 into the clamping groove 515, the clamping groove 515 is a frustum-shaped structure with the cross-sectional dimensions decreasing from top to bottom; the insertion post 542 is a frustum-shaped structure with the cross-sectional dimensions decreasing from top to bottom; the diameter of the upper end of the insertion post 542 is larger than the diameter of the upper end of the clamping groove 515.

[0257] In order to facilitate the insertion of the second connecting rod 120 into the insertion hole 543, in the double-seat clamping structure 500, the column partition groove 544 extends along the axial direction of the insertion column 542.

[0258] For a cone with a large axial installation space for the positioning screw 520, a double-seat clamping structure 500 can be installed on the cone. The double-seat clamping structure 500 has a greater degree of freedom than the double-seat snap-fit ​​structure 600.

[0259] Example 7

[0260] like Figures 42 to 49 ,like Figures 1 to 6 ,like Figures 12 to 15 As shown, the spinal internal fixation assembly of this embodiment includes: a third connecting rod 130, a double-seat snap-fit ​​structure 600, and a double-headed fixation structure 700.

[0261] The double-seat snap-fit ​​structure 600 includes a snap-fit ​​double-groove seat 610, a fixing screw 620, a screw plug 530, a snap-fit ​​sleeve 630, and a fixing ball ring 640. The snap-fit ​​double-groove seat 610 includes a fixed seat 611 and a snap-fit ​​seat 612 connected to each other. The upper part of the fixed seat 611 is provided with a downwardly recessed receiving groove 613, and the lower part of the fixed seat 611 is movably connected to the fixing screw 620. The receiving groove 613 is provided with a receiving internal thread 614, which is threadedly connected to the screw plug 530. The fixing ball ring 640 is inserted into the receiving groove 613, and the fixing ball ring 640 is located above the fixing screw 620. The bottom surface of the fixing ball ring 640 presses against the fixing screw 620, and the third connecting rod 130 presses against the top surface of the fixing ball ring 640.

[0262] The outer surface of the snap-fit ​​sleeve 630 is a frustum-shaped structure. The snap-fit ​​sleeve 630 is provided with a snap-fit ​​axial through hole 631 for inserting the second connecting rod 120. The outer surface of the snap-fit ​​sleeve 630 is provided with a snap-fit ​​groove 632 that communicates with the snap-fit ​​axial through hole 631. The snap-fit ​​seat 612 is provided with a snap-fit ​​groove 615 for the snap-fit ​​sleeve 630 to be snapped into. The recessed direction of the receiving groove 613 is perpendicular to the axial direction of the snap-fit ​​groove 615.

[0263] The second connecting rod 120 passes through the axial through hole 631 of the snap-fit ​​part sleeve 630 of the double-seat snap-fit ​​structure 600, and the axial through hole 631 of the snap-fit ​​part sleeve 630 of the double-seat snap-fit ​​structure 600 holds the second connecting rod 120 in place.

[0264] The third connecting rod 130 passes through the receiving groove 613 of the double-seat snap-fit ​​structure 600, and the screw plug 530 can press down the third connecting rod 130 passing through the receiving groove 613.

[0265] In the double-seat snap-fit ​​structure 600, the smaller end of the snap-fit ​​sleeve 630 is the insertion end 634, and the larger end is the mounting end 635. The snap-fit ​​sleeve 630 has a frustum-shaped structure, and along the axial direction of the snap-fit ​​sleeve 630, the cross-sectional dimensions of the snap-fit ​​sleeve 630 increase sequentially from the insertion end 634 to the mounting end 635. The insertion end 634 of the snap-fit ​​sleeve 630 is used to insert into the slot 615 of the snap-fit ​​base 612. Along the axial direction of the slot 615, the two ends of the slot 615 are the first slot end 6151 and the second slot end 6152, respectively. The insertion end 634 of the engaging sleeve 630 passes through the first slot end 6151 and the second slot end 6152 in sequence. The slot 615 has a frustum-shaped structure. Along the axial direction of the slot 615, from the first slot end 6151 to the second slot end 6152, the cross-sectional dimensions of the slot 615 decrease sequentially. The diameter of the larger end of the engaging sleeve 630 is smaller than the diameter of the larger end of the engaging sleeve 630. A mounting head is provided on the larger end of the engaging sleeve 630, and the outer surface of the mounting head is cylindrical.

[0266] The receiving groove 613 penetrates the fixing seat 611 radially. The fixing seat 611 includes a fixing base 616 and a fixing upper arm disposed on the upper end of the fixing base 616. The fixing upper arm includes two opposing fixing nail arms 617 respectively located on both sides of the receiving groove 613. The fixing screw 620 includes a fixing nail body 621 and a fixing nail head 622 connected to the upper end of the fixing nail body 621. The fixing base 616 is provided with a fixing ball groove 618 for the fixing nail head 622 to be inserted. A fixing ball ring 640 is located above the fixing nail head 622, and the bottom surface of the fixing ball ring 640 presses against the fixing nail head 622. The third connecting rod 130 presses against the top surface of the fixing ball ring 640. Each fixing nail arm 617 is arc-shaped; the fixing base 616 is cylindrical; the vertical plane passing through the central axis of the fixing base 616 and equidistant from the two fixing nail arms 617 is the intermediate plane; the two fixing nail arms 617 are symmetrically arranged with the intermediate plane as the central axis. A fixing stop 650 is provided on the inner side of the fixed upper arm portion, and the fixing stop 650 is located between the fixing internal thread portion and the fixing ball groove 618. The fixing stop 650 is used to prevent the fixing ball ring 640 from moving outward.

[0267] In this embodiment, when the dual-seat snap-fit ​​structure 600 is used, the third connecting rod 130 is inserted into the receiving groove 613 of the fixing seat 611, and the third connecting rod 130 is pressed onto the fixing ball ring 640 using the screw plug 530. The fixing ball ring 640 presses against the fixing head 622 of the fixing screw 620. When the pressure generated by the screw plug 530 further increases, the third connecting rod 130, the fixing ball ring 640, and the fixing head 622 of the fixing screw 620 can be locked. The second connecting rod 120 is first inserted into the axial through hole 631 of the snap-fit ​​part sleeve 630, and then the second connecting rod 120 is inserted into the snap-fit ​​groove 615 of the fixing seat 611 from the opening of the snap-fit ​​groove 615. Then, the snap-fit ​​part sleeve 630 is pressed into the snap-fit ​​groove 615 of the snap-fit ​​seat 612 from the end face of the snap-fit ​​seat 612. As the insertion end 634 of the snap-fit ​​sleeve 630 gradually extends into the slot 615 of the snap-fit ​​seat 612, the snap-fit ​​partition 632 gradually closes, the friction between the snap-fit ​​sleeve 630 and the slot 615 of the snap-fit ​​seat 612 gradually increases, the width of the slot 632 gradually decreases, and the friction between the second connecting rod 120 and the insertion end 634 of the snap-fit ​​sleeve 630 increases accordingly. When the friction between the snap-fit ​​sleeve 630 and the slot 615 of the snap-fit ​​seat 612 finally increases to the point that the snap-fit ​​sleeve 630 and the snap-fit ​​seat 612 are locked together, the axial through hole 631 of the snap-fit ​​part at the center of the snap-fit ​​sleeve 630 also clamps the second connecting rod 120 at the same time. Thus, the snap-fit ​​seat 612 and the snap-fit ​​sleeve 630, as well as the snap-fit ​​sleeve 630 and the second connecting rod 120, are also synchronously locked together.

[0268] In order to facilitate the insertion of the second connecting rod 120 into the axial through hole 631 of the snap-fit ​​part, in the double-seat snap-fit ​​structure 600, the snap-fit ​​part groove 632 extends along the axial direction of the snap-fit ​​part sleeve 630.

[0269] For vertebrae with limited installation space in the axial direction of the fixing screw 620, a double-seat snap-fit ​​structure 600 can be installed on the vertebrae.

[0270] Example 8

[0271] like Figure 50 , Figures 42 to 49 , Figures 1 to 6 ,like Figures 12 to 15 , Figures 36 to 41 As shown, the spinal internal fixation assembly of this embodiment includes: a double-body clamping structure 500, a plug-type fixation structure 900, a single-head fixation structure 300, and a double-body snap-fit ​​structure 600; the first connecting rod 110 sequentially passes through the insertion hole 543 of the insertion seat 541 of the double-body clamping structure 500, the plug mounting hole 923 of the plug seat 921, the arc-shaped groove 323 of the clamping part nail seat 322 of the single-head fixation structure 300, and the double-body snap-fit ​​structure 600. The first connecting rod 110 is held in place by the axial through hole 631 of the snap-fit ​​sleeve 630 of the 00 and the snap-fit ​​mounting hole 923 of the snap-fit ​​seat 921. The inner walls of the two clamping rings 310 press against the first connecting rod 110. The insertion hole 543 of the insertion seat 541 of the double-seat clamping structure 500 holds the first connecting rod 110. The first connecting rod 110 is held in place by the axial through hole 631 of the snap-fit ​​sleeve 630 of the double-seat snap-fit ​​structure 600.

[0272] The second connecting rod 120 passes through the positioning groove 513 of the double-seat clamping structure 500, and the screw plug 530 can press down the second connecting rod 120 passing through the positioning groove 513.

[0273] The third connecting rod 130 passes through the receiving groove 613 of the double-seat snap-fit ​​structure 600, and the screw plug 530 can press the third connecting rod 130 passing through the receiving groove 613.

[0274] Example 9

[0275] like Figure 51 , Figures 42 to 49 , Figures 1 to 6 ,like Figures 12 to 15 , Figures 36 to 41 ,like Figures 17 to 35As shown, the spinal internal fixation assembly of this embodiment includes: a double-body clamping structure 500, a plug-type fixation structure 900, a single-head fixation structure 300, a double-head hinge structure 400, and a double-body snap-fit ​​structure 600; the first connecting rod 110 sequentially passes through the insertion hole 543 of the insertion seat 541 of the double-body clamping structure 500, the plug mounting hole 923 of the plug seat 921, the arc-shaped groove 323 of the clamping part nail seat 322 of the single-head fixation structure 300, the hinge mounting hole 414 of the hinge seat 411, and the double-body snap-fit ​​structure 600. The first connecting rod 110 is held in place by the axial through hole 631 of the snap-fit ​​sleeve 630 of the snap-fit ​​part and the snap-fit ​​mounting hole 923 of the snap-fit ​​part of the snap-fit ​​seat 921. The inner walls of the two clamping rings 310 press against the first connecting rod 110. The first connecting rod 110 is held in place by the insertion hole 543 of the insertion seat 541 of the double-seat clamping structure 500. The first connecting rod 110 is held in place by the axial through hole 631 of the snap-fit ​​sleeve 630 of the double-seat snap-fit ​​structure 600. The first connecting rod 110 is held in place by the hinge mounting hole 414 of the hinge seat 411.

[0276] The second connecting rod 120 passes through the positioning groove 513 of the double-seat clamping structure 500, and the screw plug 530 can press down the second connecting rod 120 passing through the positioning groove 513.

[0277] The third connecting rod 130 passes through the receiving groove 613 of the double-seat snap-fit ​​structure 600, and the screw plug 530 can press the third connecting rod 130 passing through the receiving groove 613.

[0278] In the above embodiments, the clamping nail body 231, the locking nail body 321, the hinge nail body 431, the positioning nail body 521, the fixing nail body 621, and the plug nail body 911 can all be installed on the cone body.

[0279] Medical staff can select the spinal internal fixation component in the above embodiments to install on the vertebral body according to the specific location and condition of the patient's spinal tumor. The spinal internal fixation component has a simple structure and can be used to treat multi-segment spinal tumors.

[0280] The first connecting rod 110, the second connecting rod 120, and the third connecting rod 130 can be straight or curved, allowing the spinal internal fixation assembly to adapt to different surgical needs. In the above embodiment, the first connecting rod 110 is curved, while the second connecting rod 120 and the third connecting rod 130 are straight. The cross-sections of the first connecting rod 110, the second connecting rod 120, and the third connecting rod 130 are all circular. The first connecting rod 110, the second connecting rod 120, and the third connecting rod 130 are made of metallic or non-metallic materials.

[0281] Since most of the existing spinal internal fixation systems used in clinical practice are made of titanium alloy, the following problems exist when these titanium alloy products are used for spinal tumor patients: 1. During postoperative imaging, the metal spinal internal fixation system produces artifacts, making it difficult to accurately judge the lesions and fusions; 2. During subsequent radiotherapy, the metal spinal internal fixation system will block radiation, affecting the quality and effectiveness of tumor treatment.

[0282] Existing internal fixation systems used clinically to treat spinal tumors are typically made of metal, which produces artifacts under radiation, affecting postoperative tumor observation and interfering with postoperative radiotherapy. The column clamping structure 200, single-head fixation structure 300, double-head hinged structure 400, double-head fixation structure 700, cascade fixation structure 900, double-head fixation structure 700, and double-seat clamping structure 500 can all be made of non-metallic materials. When the first connecting rod 110, second connecting rod 120, and third connecting rod 130 are all made of non-metallic materials, the spinal internal fixation components of the above embodiments, after being installed on the vertebral body, will not produce artifacts, thus avoiding difficulties in accurately judging lesions and fusions. During subsequent radiotherapy, the spinal internal fixation components will not block radiation, thus not affecting tumor quality and efficacy. Therefore, the spinal internal fixation components of this embodiment are radiation-permeable structures.

[0283] In Embodiment 6 above, in the dual-body clamping structure 500, the clamping part double-groove seat 510, positioning screw 520, screw plug 530, and positioning ball ring 550 are all made of metal; the clamping part insert 540 is made of non-metallic material, and the second connecting rod 120 passing through the positioning groove 513 is generally made of metal. In Embodiment 7 above, in the dual-body snap-fit ​​structure 600, the snap-fit ​​part double-groove seat 610, fixing screw 620, screw plug 530, and fixing ball ring 640 are all made of metal; the snap-fit ​​part sleeve 630 is made of non-metallic material, and the third connecting rod 130 passing through the receiving groove 613 is generally made of metal. When the dual-body clamping structure 500 and / or the dual-body snap-fit ​​structure 600 are installed on the vertebral body, non-metallic components can be interfaced with existing metallic internal fixation systems, expanding the application range of non-metallic components in spinal internal fixation. The non-metallic components can be one or more of the following: column clamping structure 200, single-head fixing structure 300, snap-fit ​​fixing structure 900, and double-head hinge structure 400.

[0284] In this embodiment, the non-metallic material is a polymer material or a polymer-based composite material. In this embodiment, the polymer material is medical-grade polyetheretherketone (PEEK), and the polymer-based composite material is carbon fiber-reinforced medical-grade PEEK.

[0285] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A single-head fixing structure, characterized in that, include: Two locking rings (310), a first connecting rod (110), and a locking screw (320); The locking screw (320) includes a locking screw body (321) and a locking screw seat (322) connected to the upper end of the locking screw body (321). The top surface of the locking screw seat (322) is provided with an arc-shaped groove (323) into which the first connecting rod (110) can be inserted. The bottom surface of the locking screw seat (322) includes a first side bottom surface (324), a middle bottom surface (325), and a second side bottom surface (326) connected in sequence. The middle bottom surface (325) is connected to the locking screw body (321). The first side bottom surface (324) and the second side bottom surface (326) are both arc-shaped structures with the radius increasing sequentially towards the middle bottom surface (325). The first side bottom surface (324) and the second side bottom surface (326) have the same size. Each of the clamping rings (310) is provided with an axial through hole (311) for clamping part. The hole wall of the axial through hole (311) includes an upper hole wall (312) and a lower hole wall (313) connected to each other. The upper hole wall (312) is an arc-shaped hole wall, and the diameter of the cross-section of the upper hole wall (312) is less than or equal to the diameter of the first connecting rod (110). The cross-section of the lower hole wall (313) is an arc-shaped hole wall, and the diameter of the cross-section of the lower hole wall (313) increases sequentially along the axial direction of the lower hole wall (313). When the first connecting rod (110) is placed in the arc-shaped groove (323) and the two clamping rings (310) are respectively fitted onto the two ends of the clamping part nail seat (322), the end with the larger cross-sectional dimension of the lower hole wall (313) of the clamping part axial through hole (311) of each clamping ring (310) is closer to the middle bottom surface (325); the upper hole wall (312) of the two clamping rings (310) presses against the first connecting rod (110), and the two clamping rings (310) are engaged with the first connecting rod (110); the lower hole wall (313) of the two clamping rings (310) presses against the first side bottom surface (324) and the second side bottom surface (326) of the clamping part nail seat (322), and the two clamping rings (310) are engaged with the clamping part nail seat (322).

2. A spinal internal fixation component, characterized in that, include: The plug-type fixing structure (900) and the single-head fixing structure (300) as described in claim 1; The latch-type fixing structure (900) includes a latch screw (910) and a latch component (920). The latch component (920) includes a latch seat (921) and a latch post (922) connected to the lower end of the latch seat (921). The latch post (922) is a frustum-shaped structure with dimensions decreasing from top to bottom. The latch seat (921) is provided with a latch mounting hole (923) for inserting the first connecting rod (110). The latch post (922) is provided with a latch partition groove (924) communicating with the latch mounting hole (923). The latch partition groove (924) divides the latch post (922) into two post blocks (925). The locking screw (910) includes a locking screw body (911) and a locking screw seat (912) connected to the top of the locking screw body (911). The top surface of the locking screw seat (912) is provided with a locking groove (913) for the locking pin (922) to be inserted into. When the first connecting rod (110) is inserted into the locking mounting hole (923) and the locking pin (922) is inserted into the locking groove (913), the locking mounting hole (923) of the locking seat (921) locks the first connecting rod (110). The first connecting rod (110) passes sequentially through the plug mounting hole (923) of the plug seat (921) and the arc-shaped groove (323) of the clamping nail seat (322) of the single-head fixing structure (300). The plug mounting hole (923) of the plug seat (921) clamps the first connecting rod (110). Two clamping rings (310) are engaged with the first connecting rod (110) and the two clamping rings (310) are engaged with the clamping nail seat (322).

3. A double-headed fixing structure, characterized in that, include: The clamping base (512), the clamping insert (540), the second connecting rod (120), and the single-head fixing structure (300) as described in claim 1; The clamping insert (540) includes an insert base (541) and an insert post (542) connected to the lower end of the insert base (541). The insert base (541) is provided with an insert hole (543) into which the second connecting rod (120) can be inserted. The insert post (542) is a frustum-shaped structure with a cross-sectional dimension decreasing from top to bottom. The insert post (542) is provided with a column partition groove (544) communicating with the insert hole (543). The column dividing groove (544) divides the insertion column (542) into two insertion bodies (545); the clamping seat (512) is connected to the clamping part nail seat (322) of the single-head fixing structure (300); the clamping seat (512) is provided with a clamping groove (515) for the insertion column (542) to be inserted into, and the axial direction of the clamping groove (515) is perpendicular to the axial direction of the arc-shaped groove (323) of the clamping part nail seat (322); As the second connecting rod (120) is inserted into the insertion hole (543) of the insertion seat (541), and the insertion post (542) is inserted into the clamping groove (515), the insertion post (542) is continuously closed under the pressure of the groove sidewall of the clamping groove (515), the column partition groove (544) gradually decreases, and the pressure exerted by the insertion hole (543) of the insertion seat (541) on the second connecting rod (120) increases, so that the insertion hole (543) of the insertion seat (541) jams the second connecting rod (120).

4. A spinal internal fixation component, characterized in that, include: The plug-type fixing structure (900) and the double-headed fixing structure (700) as described in claim 3; The latch-type fixing structure (900) includes a latch screw (910) and a latch component (920). The latch component (920) includes a latch seat (921) and a latch post (922) connected to the lower end of the latch seat (921). The latch post (922) is a frustum-shaped structure with dimensions decreasing from top to bottom. The latch seat (921) is provided with a latch mounting hole (923) for inserting a second connecting rod (120). The latch post (922) is provided with a latch partition groove (924) communicating with the latch mounting hole (923). The latch partition groove (924) divides the latch post (922) into two column blocks. The locking screw (910) includes a locking screw body (911) and a locking screw seat (912) connected to the top of the locking screw body (911). The top surface of the locking screw seat (912) is provided with a locking groove (913) for the locking pin (922) to be inserted into. The second connecting rod (120) is inserted into the plug mounting hole (923) of the plug seat (921). During the process of the plug pin (922) being inserted into the plug groove (913), the plug pin (922) is continuously closed under the pressure of the groove sidewall of the plug groove (913). The plug groove (924) gradually decreases. The pressure applied by the plug mounting hole (923) of the plug seat (921) on the second connecting rod (120) increases, so that the plug mounting hole (923) of the plug seat (921) locks the second connecting rod (120).

5. A spinal internal fixation component, characterized in that, include: The single-head fixing structure (300) as described in claim 1 and the double-head fixing structure (700) as described in claim 3; The first connecting rod (110) of the single-head fixing structure (300) is connected to the second connecting rod (120) of the double-head fixing structure (700) to form a series rod (140).

6. A spinal internal fixation assembly, characterized in that, Includes: a column clamping structure (200) and a double-headed fixing structure (700) as described in claim 3; The column clamping structure (200) includes a clamping member (210), a locking ring (220), and a clamping screw (230); The clamping member (210) includes a clamping seat (211) and a clamping post (212) connected to the lower end of the clamping seat (211); the clamping post (212) is cylindrical, the clamping seat (211) is provided with a clamping part mounting hole (213) for inserting a second connecting rod (120), the clamping post (212) is provided with a clamping part partition groove (214) communicating with the clamping part mounting hole (213), the clamping part partition groove (214) divides the clamping post (212) into two column blocks (215); the clamping part screw (230) includes a clamping part screw body (231) and a clamping part screw seat (232) connected to the upper end of the clamping part screw body (231), the top surface of the clamping part screw seat (232) is provided with a clamping post (212) for inserting a second connecting rod (120). 212) The clamping part seat mounting groove (233) is inserted. The outer side of the clamping part nail seat (232) is a frustum-shaped structure with the size decreasing from top to bottom. Along the circumference of the outer side of the clamping part nail seat (232), a plurality of clamping part opening grooves (234) communicating with the clamping part seat mounting groove (233) are provided. Each clamping part opening groove (234) extends to the upper end face of the clamping part nail seat (232). The locking ring (220) is provided with an axial through hole (221) for the clamping part nail seat (232) to be inserted. The axial through hole (221) is a frustum-shaped structure with the size decreasing from top to bottom. The diameter of the upper end of the outer side of the clamping part nail seat (232) is larger than the diameter of the upper end face of the axial through hole (221). The second connecting rod (120) passes through the clamping part mounting hole (213) of the clamping seat (211), the locking ring (220) is sleeved on the clamping part nail seat (232), the locking ring (220) presses against the clamping part nail seat (232), and the clamping part nail seat (232) presses against the clamping column (212), so that the clamping part mounting hole (213) of the clamping seat (211) locks the second connecting rod (120).

7. A spinal internal fixation assembly, characterized in that, include: Double-headed hinge structure (400) and double-headed fixing structure (700) as described in claim 3; The double-headed hinge structure (400) includes a double-headed hinge member (410), a clamping ring (420), and a hinge screw (430); the double-headed hinge member (410) includes a hinge seat (411) and a hinge body (412) connected to the lower end of the hinge seat (411); the lower end surface of the hinge body (412) is a spherical surface (413), and the hinge seat (411) is provided with a space for the second connecting rod (120) to be inserted. The hinge mounting hole (414) is provided on the hinge body (412), which is connected to the hinge mounting hole (414) and the hinge part partition groove (415) divides the hinge body (412) into two hinge blocks (416); the hinge screw (430) includes a hinge screw body (431) and a hinge screw seat (432) connected to the upper end of the hinge screw body (431). The top surface of the hinge pin seat (432) is provided with a spherical hinge seat mounting groove (433) into which the hinge body (412) can be inserted. The outer surface of the hinge pin seat (432) is a frustum-shaped structure with dimensions decreasing from top to bottom. Along the circumference of the outer surface of the hinge pin seat (432), a plurality of hinge opening slots (434) communicating with the hinge seat mounting groove (433) are provided. Each hinge... The joint opening groove (434) extends to the upper end face of the hinge pin seat (432); the clamping ring (420) is provided with an axial through hole (421) for the hinge pin seat (432) to be inserted, and the axial through hole (421) is a frustum-shaped structure with the size decreasing from top to bottom; the diameter of the upper end of the outer side of the hinge pin seat (432) is larger than the diameter of the upper end face of the axial through hole (421); The second connecting rod (120) passes through the hinge mounting hole (414) of the hinge seat (411), the clamping ring (420) is sleeved on the hinge pin seat (432), the clamping ring (420) presses against the hinge pin seat (432), and the hinge pin seat (432) presses against the hinge body (412), so that the hinge mounting hole (414) of the hinge seat (411) locks the second connecting rod (120).

8. A spinal internal fixation assembly, characterized in that, include: The third connecting rod (130), the double-seat clamping structure (500), and the double-headed fixing structure (700) as described in claim 3; The dual-seat clamping structure (500) includes a clamping part double-groove seat (510), a positioning screw (520), a screw plug (530), a clamping part insert (540), and a positioning ball ring (550); the clamping part double-groove seat (510) includes a positioning seat (511) and a clamping seat (512) connected to each other, the upper part of the positioning seat (511) is provided with a downwardly recessed positioning groove (513), and the lower part of the positioning seat (511) is connected to the positioning screw (520). Connection; the positioning groove (513) is provided with a positioning internal thread (514), the positioning internal thread (514) is threadedly connected to the screw plug (530), the positioning ball ring (550) is inserted into the positioning groove (513), the positioning ball ring (550) is above the positioning screw (520), the bottom surface of the positioning ball ring (550) presses against the positioning screw (520); the third connecting rod presses against the top surface of the positioning ball ring (550); The clamping insert (540) includes an insert base (541) and an insert post (542) connected to the lower end of the insert base (541). The insert base (541) is provided with an insert hole (543) into which the second connecting rod (120) can be inserted. The insert post (542) is a frustum-shaped structure with a cross-sectional dimension decreasing from top to bottom. The insert post (542) is provided with a column partition groove (544) communicating with the insert hole (543). The column partition groove (544) divides the insert post (542) into two insert bodies (545). The clamping base (512) is provided with a clamping groove (515) for the insert post (542) to be inserted into. The axial direction of the clamping groove (515) is parallel to the recessed direction of the positioning groove (513). The second connecting rod (120) passes through the insertion hole (543) of the insertion seat (541) of the double-seat clamping structure (500), and the insertion hole (543) of the insertion seat (541) of the double-seat clamping structure (500) holds the second connecting rod (120). The third connecting rod (130) passes through the positioning groove (513) of the double-seat clamping structure (500), and the screw plug (530) can press down the third connecting rod (130) passing through the positioning groove (513).

9. A spinal internal fixation assembly, characterized in that, include: The third connecting rod (130), the double-seat snap-fit ​​structure (600), and the double-head fixing structure (700) as described in claim 3; The double-seat snap-fit ​​structure (600) includes a snap-fit ​​double-groove seat (610), a fixing screw (620), a screw plug (530), a snap-fit ​​sleeve (630), and a fixing ball ring (640); the snap-fit ​​double-groove seat (610) includes a fixed seat (611) and a snap-fit ​​seat (612) connected to each other; the upper part of the fixed seat (611) is provided with a downwardly recessed receiving groove (613), and the lower part of the fixed seat (611) is movably connected to the fixing screw (620); The receiving groove (613) is provided with a receiving internal thread (614), the receiving internal thread (614) is threadedly connected to the screw plug (530), the fixing ball ring (640) is inserted into the receiving groove (613), the fixing ball ring (640) is above the fixing screw (620), the bottom surface of the fixing ball ring (640) presses against the fixing screw (620), and the third connecting rod (130) presses against the top surface of the fixing ball ring (640); The outer surface of the snap-fit ​​sleeve (630) is a frustum-shaped structure. The snap-fit ​​sleeve (630) is provided with a snap-fit ​​axial through hole (631) into which the second connecting rod (120) can be inserted. The outer surface of the snap-fit ​​sleeve (630) is provided with a snap-fit ​​groove (632) that communicates with the snap-fit ​​axial through hole (631). The snap-fit ​​seat (612) is provided with a snap-fit ​​groove (615) into which the snap-fit ​​sleeve (630) is inserted. The recessed direction of the receiving groove (613) is perpendicular to the axial direction of the snap-fit ​​groove (615). The second connecting rod (120) passes through the axial through hole (631) of the snap-fit ​​sleeve (630) of the double-seat snap-fit ​​structure (600), and the axial through hole (631) of the snap-fit ​​sleeve (630) of the double-seat snap-fit ​​structure (600) holds the second connecting rod (120). The third connecting rod (130) passes through the receiving groove (613) of the double-seat snap-fit ​​structure (600), and the screw plug (530) can press the third connecting rod (130) passing through the receiving groove (613).

Images