Strap Fixators and Spinal Fixation Systems

Abstract

The present invention relates to a bandage fixator and a spinal fixation system, the bandage fixator comprises: a base, a first fixing member and a transmission device, the base is used to be fixed to a connecting rod, a mounting cavity is provided in the base, the first fixing member is connected to the base, the first fixing member is used to fix one end of the bandage on the base, the transmission device comprises a transmission wheel, the transmission wheel is rotatably mounted in the mounting cavity, the transmission wheel and the inner wall of the mounting cavity define a stretching channel, the other end of the bandage is passed through the stretching channel, the transmission wheel has a traction surface, and the traction surface can drive the bandage to move. The bandage fixator of the present invention has a simple structural design, is easy to use, and is conducive to shortening the operation time.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a binding fastener and a spinal fixation system. Background Art

[0002] In spinal orthopedic surgery, a screw-rod fixation system is usually required. When implanting the screw-rod fixation system, the doctor first implants the screw into the vertebral pedicle, puts the connecting rod into the screw cap of the adjacent segment pedicle screw, and pre-locks it with a screw plug. Since the screw on the vertebral body with spinal deformity is a certain distance away from the posterior screw rod, an orthopedic instrument is required to forcibly pull the pedicle screw at the vertebral body to the posterior connecting rod for locking, thereby achieving the purpose of correction. However, the structural design of the orthopedic instrument in the related art is complex, which is inconvenient for the doctor's intraoperative operation. Summary of the invention

[0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0004] To this end, an embodiment of the present invention provides a bandage fixator, which has a simple structural design, is easy to use, and is conducive to shortening the operation time.

[0005] The embodiment of the present invention further provides a spinal fixation system.

[0006] The strap fastener of an embodiment of the present invention includes: a base, the base is used to be fixed to a connecting rod, and a mounting cavity is provided in the base; a first fixing member, the first fixing member is connected to the base, and the first fixing member is used to fix one end of the strap to the base; a transmission device, the transmission device includes a transmission wheel, the transmission wheel is rotatably installed in the mounting cavity, the transmission wheel and the inner wall of the mounting cavity define a stretching channel, the other end of the strap is inserted into the stretching channel, and the transmission wheel has a traction surface, and the traction surface can drive the strap to move.

[0007] According to the strap fixer of the embodiment of the present invention, when the strap fixer is used, one end of the strap can be fixed on the base through the first fixing member, and because the traction surface of the transmission wheel can drive the strap to move, under the rotation of the transmission wheel, the other end of the strap can move in the stretching channel and gradually tighten the strap, thereby pulling the vertebral body wrapped by the strap to a position close to the connecting rod. Therefore, the strap fixer of the embodiment of the present invention has a simple structural design, is easy to use, and is conducive to shortening the operation time.

[0008] In some embodiments, the transmission device also includes a worm, which is arranged in the installation cavity, the transmission wheel is a worm wheel, the traction surface is a meshing tooth surface, the meshing tooth surface is arranged on the outer peripheral wall of the worm wheel, and is transmitted to the worm wheel and the belt.

[0009] In some embodiments, a screwing portion is provided at the end of the worm, and the screwing portion is used to connect a wrench; and / or, a protrusion that cooperates with the meshing tooth surface is provided on the binding strap.

[0010] In some embodiments, a positioning groove is provided on the inner wall of the installation cavity, one end of the worm is rotatably installed in the positioning groove, a connecting port is provided on the base, and the screwing part is arranged opposite to the connecting port; and / or the screwing part is a wrench groove.

[0011] In some embodiments, the stretching channel and the worm are respectively arranged on two sides of the worm wheel in a radial direction.

[0012] In some embodiments, a clamping cavity is provided on the base, and the first fixing member passes through the clamping cavity and can press the connecting rod.

[0013] In some embodiments, the first fixing member is a screw plug, and a threaded channel and a through hole are provided on the base. The through hole is connected with the threaded channel along the radial direction of the threaded channel. One end of the strap can be inserted into the threaded channel through the through hole. The threaded channel is connected with the clamping cavity. The screw plug is fitted in the threaded channel and presses the strap against the connecting rod.

[0014] In some embodiments, the base includes a fixing box and a box cover, the fixing box and the box cover are detachably connected and enclose the installation cavity, and the first fixing member is connected to the fixing box.

[0015] In some embodiments, the base further includes a second fixing member, the second fixing member is penetrated through the fixing box, the box cover and the second fixing member, and the transmission wheel is pivotally connected to the second fixing member.

[0016] A spinal fixation system according to another embodiment of the present invention comprises a connecting rod; a pedicle screw, wherein the pedicle screw is mounted on the connecting rod; and a strap fixator, wherein the strap fixator is any one of the strap fixators described in the embodiments of the present invention, and the strap fixator is mounted on the connecting rod.

[0017] According to the spinal fixation system of the embodiment of the present invention, when the bandage fixator is used, one end of the bandage can be fixed on the base through the first fixing member. Since the traction surface of the transmission wheel can drive the bandage to move, under the rotation of the transmission wheel, the other end of the bandage can move in the stretching channel and gradually tighten the bandage, thereby pulling the vertebral body wrapped by the bandage to a position close to the connecting rod. Therefore, the bandage fixator of the embodiment of the present invention has a simple structural design, is easy to use, and is conducive to shortening the operation time. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the installation of the strap fastener and the connecting rod according to an embodiment of the present invention.

[0019] Figure 2 Schematic diagram of the installation of the base (without the box cover), the connecting rod and the strap of the strap fastener according to an embodiment of the present invention.

[0020] Figure 3 This is a front view of the installation of the base (without the box cover), the connecting rod and the strap of the strap fastener according to an embodiment of the present invention.

[0021] Figure 4 1 is an exploded view of a strap fastener, a connecting rod and a wrench according to an embodiment of the present invention.

[0022] Figure 5 1 is a schematic diagram of the installation of the strap fastener and the connecting rod from another perspective according to an embodiment of the present invention.

[0023] Figure 6 It is a schematic diagram of the installation of the connecting rod and the pedicle screw on the spine according to an embodiment of the present invention.

[0024] Reference numerals:

[0025] 1. Base; 11. Fixing box; 111. Installation cavity; 112. Stretching channel; 113. Clamping cavity; 114. Threading hole; 115. Threaded channel; 12. Box cover; 13. Second fixing member; 14. Positioning groove; 15. Communication port;

[0026] 2. First fixing member; 21. Screw plug;

[0027] 3. Transmission device; 31. Transmission wheel; 311. Traction surface; 312. Worm wheel; 32. Worm; 321. Screwing part;

[0028] 4. Binding straps;

[0029] 5. Connecting rod;

[0030] 6. Pedicle screws;

[0031] 7. Wrench. DETAILED DESCRIPTION

[0032] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0033] Please refer to the following Figures 1 to 6 The strap fixator and spinal fixation system according to the embodiments of the present invention are described.

[0034] like Figures 1 to 4 As shown, the strap fastener of the embodiment of the present invention comprises: a base 1, a first fixing member 2 and a transmission device 3. The base 1 is used to be fixed to the connecting rod 5, a mounting cavity 111 is provided in the base 1, the first fixing member 2 is connected to the base 1, the first fixing member 2 is used to fix one end of the strap 4 on the base 1, and the transmission device 3 comprises a transmission wheel 31, the transmission wheel 31 is rotatably mounted in the mounting cavity 111, the transmission wheel 31 and the inner wall of the mounting cavity 111 define a stretching channel 112, the other end of the strap 4 is passed through the stretching channel 112, the transmission wheel 31 has a traction surface 311, and the traction surface 311 can drive the strap 4 to move.

[0035] According to the strap fixer of the embodiment of the present invention, when the strap fixer is used, one end of the strap 4 can be fixed on the base 1 through the first fixing member 2, and because the traction surface 311 of the transmission wheel 31 can drive the strap 4 to move, under the rotation of the transmission wheel 31, the other end of the strap 4 can move in the stretching channel 112 and gradually tighten the strap 4, thereby pulling the vertebral body wrapped by the strap 4 to a position close to the connecting rod 5. Therefore, the strap fixer of the embodiment of the present invention has a simple structural design, is easy to use, and is conducive to shortening the operation time.

[0036] It is understandable that if Figure 2 and Figure 3 As shown, before the other end of the bandage 4 is passed through the stretching channel 112, it is necessary to first wrap the bandage 4 around the vertebral body, and then pass the other end of the bandage 4 through the stretching channel 112, and rotate the transmission wheel 31 to tighten the ring structure formed by the bandage 4, thereby achieving the purpose of vertebral traction correction.

[0037] In other words, the transmission wheel 31 can rotate clockwise and counterclockwise to continuously roll in and out the bandage 4. Rolling in the bandage 4 stretches the vertebral body, while rolling out the bandage 4 reduces the stretching effect of the bandage 4 on the vertebral body.

[0038] Exemplarily, the traction surface 311 is a meshing tooth surface, and the strap 4 is provided with a protrusion that matches the meshing tooth surface, thereby increasing the friction between the traction surface 311 and the strap 4 and reducing the probability of relative sliding and loosening of the strap 4 and the transmission wheel 31.

[0039] For example, the strap 4 is a flexible plastic strap structure, and a convex toothed surface is provided on the strap 4, so that the traction surface 311 on the transmission wheel 31 can engage with the toothed surface on the strap 4, so as to drive the strap 4 to be tightened under the rotation of the transmission wheel 31, thereby reducing the probability of relative sliding and loosening of the strap 4 and the transmission wheel 31.

[0040] Alternatively, if Figures 2 to 4As shown, the transmission device 3 also includes a worm 32, which is arranged in the installation cavity 111, the transmission wheel 31 is a worm wheel 312, the traction surface 311 is a meshing tooth surface and is arranged on the outer peripheral wall of the worm wheel 312, and the traction surface 311 (meshing tooth surface) is meshed with the worm wheel 312 and the strap 4 for transmission. It can be understood that the transmission device 3 is transmitted by the worm wheel 312 and the worm 32, and the worm 32 is the power input end, and the worm wheel 312 is the power output end. The transmission principle of the worm wheel 312 and the worm 32 is: the worm 32 can drive the worm wheel 312 to rotate, while the worm wheel 312 cannot drive the worm 32 to rotate, and the worm wheel 312 will self-lock when driving the worm 32 to rotate.

[0041] Take the tightening of the bandage 4 when the worm wheel 312 rotates clockwise as an example. When the worm 32 is stagnant and the worm wheel 312 is not rotating, the bandage 4 will give the worm wheel 312 a counterclockwise rotation force under the action of the restoring force of the vertebral body. According to the self-locking principle of the worm 32 and the worm wheel 312, the worm wheel 312 will not rotate counterclockwise. At this time, even if the doctor does not move the restraining force to the worm 32, the worm wheel 312 will not rotate in the opposite direction, and thus the bandage 4 will not fall back and loosen, thereby improving the convenience and reliability of the bandage 4 during traction.

[0042] Alternatively, if Figure 4 As shown, the end of the worm 32 is provided with a screwing portion 321, and the screwing portion 321 is used to connect the wrench 7. It can be understood that the worm 32 is driven by the wrench 7, thereby reducing the manufacturing cost of the strap fastener, and the structure is simple and easy to operate.

[0043] For example, the screwing portion 321 is a wrench slot, and the wrench slot can be a hexagonal slot or a plum blossom slot, which is not limited in the present application.

[0044] Furthermore, if Figure 4 As shown, the inner wall of the installation cavity 111 is provided with a positioning groove 14, one end of the worm 32 is rotatably installed in the positioning groove 14, the base 1 is provided with a connecting port 15, and the screwing portion 321 is arranged opposite to the connecting port 15. It can be understood that the worm 32 is completely located in the installation cavity 111, thereby reducing the occupied space of the strap fastener and making the structure compact. In addition, the positioning groove 14 and the connecting port 15 can axially limit the worm 32, which can improve the stability of the worm 32 during installation and transmission.

[0045] Alternatively, if Figure 3 As shown, the stretching channel 112 and the worm 32 are respectively arranged on both sides of the radial direction of the worm wheel 312. Therefore, when the strap 4 is rolled in and out, the worm 32 will not interfere with the movement of the strap 4, making the movement of the strap 4 smoother. Figure 3As shown, the arrangement direction of the worm wheel 312 and the worm 32 is the same as the extension direction of the connecting rod 5, thereby reducing the radial space occupied by the strap fastener on the connecting rod 5, reducing the damage of the strap fastener to the soft tissue around the patient's spine, reducing the wound area, and facilitating the patient's postoperative recovery.

[0046] In some embodiments, Figure 2 As shown, the base 1 is provided with a clamping cavity 113, and the first fixing member 2 is passed through the clamping cavity 113 and can press the connecting rod 5. It can be understood that the first fixing member 2 can fix the connecting rod 5 and the strap 4 at the same time, thereby reducing the use of parts, making the strap fixing device simple in structure and convenient for processing and manufacturing.

[0047] It should be noted that the first fixing member 2 may be in direct contact with the connecting rod 5 or may be in indirect contact with the connecting rod 5 , and this application does not limit this.

[0048] Alternatively, if Figure 2 and Figure 4 As shown, the first fixing member 2 is a screw plug 21, and the base 1 is provided with a threaded channel 115 and a through hole, the through hole is connected with the threaded channel 115 along the radial direction of the threaded channel 115, one end of the strap 4 can be inserted into the threaded channel 115 through the through hole, the threaded channel 115 is connected with the clamping cavity 113, the screw plug 21 is fitted in the threaded channel 115, and abuts against the strap 4 and the connecting rod 5. In other words, the screw plug 21 can abut the strap 4 against the connecting rod 5 to limit the strap 4 and the connecting rod 5.

[0049] It can be understood that the through hole penetrates the threaded channel 115 along the radial direction of the threaded channel 115, one end of the strap 4 is inserted into the threaded channel 115 through the through hole, the plug 21 is screwed into the threaded channel 115, and the plug 21 is abutted against one end of the strap 4 and the wall of the connecting rod 5, thereby fixing the strap fastener on the connecting rod 5 and connecting to one end of the strap 4.

[0050] In some embodiments, Figure 1 , Figure 2 and Figure 5 As shown, the base 1 includes a fixing box 11 and a box cover 12, which are detachably connected and enclose a mounting cavity 111, and the first fixing member 2 is connected to the fixing box 11. Since the fixing box 11 and the box cover 12 are detachably connected, the transmission device 3 can be conveniently installed and arranged in the mounting cavity 111, which is convenient for the processing and manufacturing of the base 1 and the assembly of the strap fastener.

[0051] For example, the fixing box 11 and the box cover 12 can be connected by snap-fitting or fastening with screws.

[0052] In the example of the present invention, Figure 2and Figure 4 As shown, the base 1 further includes a second fixing member 13, which is inserted through the fixing box 11, the box cover 12 and the second fixing member 13, and the transmission wheel 31 is pivotally connected to the second fixing member 13. Thus, the second fixing member 13 can fix the fixing box 11 and the box cover 12, and can also rotatably support the transmission wheel 31, which is beneficial to reduce the number of components of the strap fastener and make the strap fastener more compact.

[0053] For example, the second fixing member 13 is a pin.

[0054] A spinal fixation system according to another embodiment of the present invention comprises a connecting rod 5 , a pedicle screw 6 and a strap fixer, wherein the pedicle screw 6 is mounted on the connecting rod 5 , and the strap fixer is the strap fixer of the present invention, and the strap fixer is mounted on the connecting rod 5 .

[0055] According to the spinal fixation system of the embodiment of the present invention, when the bandage fixator is used, one end of the bandage 4 can be fixed on the base 1 through the first fixing member 2, and because the traction surface 311 of the transmission wheel 31 can drive the bandage 4 to move, under the rotation of the transmission wheel 31, the other end of the bandage 4 can move in the stretching channel 112 and gradually tighten the bandage 4, thereby pulling the vertebral body wrapped by the bandage 4 to a position close to the connecting rod 5. Therefore, the bandage fixator of the embodiment of the present invention has a simple structural design, is easy to use, and is conducive to shortening the operation time.

[0056] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0057] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0058] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0059] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0060] In the present invention, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0061] Although the above embodiments have been shown and described, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present invention.

Claims

1. A strap fastener, characterized in that: include: A base, the base is used to be fixed to the connecting rod, and a mounting cavity is provided in the base; A first fixing member, the first fixing member is connected to the base, and the first fixing member is used to fix one end of the strap on the base; A transmission device, the transmission device comprising a transmission wheel, the transmission wheel is rotatably mounted in the installation cavity, the transmission wheel and the inner wall of the installation cavity define a stretching channel, the other end of the strap is passed through the stretching channel, the transmission wheel has a traction surface, and the traction surface can drive the strap to move; The transmission device further comprises a worm, the worm is arranged in the installation cavity, the transmission wheel is a worm wheel, the traction surface is a meshing tooth surface, the meshing tooth surface is arranged on the outer peripheral wall of the worm wheel and is transmitted with the worm wheel and the binding belt; The base is provided with a clamping cavity, and the first fixing member is passed through the clamping cavity and can press the connecting rod; The first fixing member is a screw plug, and a threaded channel and a through hole are provided on the base. The through hole is connected with the threaded channel along the radial direction of the threaded channel. One end of the strap can be inserted into the threaded channel through the through hole. The threaded channel is connected with the clamping cavity. The screw plug is fitted in the threaded channel and presses the strap against the connecting rod.

2. The strap fastener according to claim 1, characterized in that: The end of the worm is provided with a screwing portion, and the screwing portion is used to connect a wrench; And / or, the binding strap is provided with a protrusion which matches with the meshing tooth surface.

3. The strap fastener according to claim 2, characterized in that: The inner wall of the installation cavity is provided with a positioning groove, one end of the worm is rotatably installed in the positioning groove, the base is provided with a communication port, and the screwing portion is arranged opposite to the communication port; And / or, the screwing portion is a wrench slot.

4. The strap fastener according to claim 1, characterized in that: The stretching channel and the worm are respectively arranged on two sides of the worm wheel in a radial direction.

5. The strap fastener according to claim 1, characterized in that: The base includes a fixing box and a box cover, the fixing box and the box cover are detachably connected and enclose the installation cavity, and the first fixing member is connected to the fixing box.

6. The strap fastener according to claim 5, characterized in that: The base also includes a second fixing member, which is penetrated by the fixing box, the box cover and the second fixing member, and the transmission wheel is pivotally connected to the second fixing member.

7. A spinal fixation system, characterized in that: include: Connecting rod; A pedicle screw, wherein the pedicle screw is mounted on the connecting rod; A strap fastener, wherein the strap fastener is the strap fastener according to any one of claims 1 to 6, and the strap fastener is installed on the connecting rod.

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