Multifunctional bone cement filler and method of use thereof

Abstract

The present invention discloses a multifunctional bone cement filler and a method for using the same, comprising: a barrel, a distal plug and a clutch are arranged on the barrel, a screw sleeve is movably provided in the clutch, a clearance groove is arranged in the screw sleeve, the upper and lower heights of the clearance groove are the same as the linear motion stroke of the piston when the specified volume of bone cement monomer is absorbed, a booster spring is arranged in the screw sleeve, a pressurizing component is slidably arranged in the screw sleeve, a convex ball is arranged on the pressurizing component, the pressurizing component abuts on the booster spring, the pressurizing component compresses the booster spring so that the convex ball abuts on the bottom of the arc-shaped stopper, a piston is sealed and slidably arranged in the barrel, the piston is connected to the pressurizing component, a stirring component is slidably arranged in the pressurizing component, and the stirring component is connected to the stirring head after passing through the piston. The present invention can automatically and accurately control the absorption amount of bone cement monomer, and is also convenient for switching between direct push pressurized injection and spiral pressurized injection.

Description

Technical Field

[0001] The invention relates to the technical field of medical instruments, and in particular to a multifunctional bone cement filler. Background Art

[0002] Bone cement is a medical material used in orthopedic surgery. It is composed of liquid monomers and powders. After the two are mixed in a certain proportion, they can be injected into the patient's affected area in a fluid state for solidification. There are many types of agitators and syringes on the market, but most of them are used separately. They need to be stirred in the agitator first and then injected into the syringe for injection. This method is not only inefficient, but also easy to solidify bone cement during the injection process, which reduces the treatment effect. At present, the bone cement mixing syringes on the market are generally pre-filled with a certain amount of bone cement powder, and then the piston needs to be manually pulled to absorb the bone cement monomer. Manual operation is not only inefficient, but also cannot control the absorption accuracy, which cannot guarantee the mixing ratio between bone cement monomer and bone cement powder. When the mixing ratio of the two is not up to standard, it will affect the physical properties, chemical properties and biocompatibility of bone cement. In addition, the bone cement mixing syringes on the market are cumbersome to operate when switching between direct push pressure injection and spiral pressure injection. Summary of the invention

[0003] The purpose of the present invention is to provide a multifunctional bone cement filler and a method of using the same, which can accurately control the absorption amount of bone cement monomer according to the amount of bone cement powder pre-filled in the cylinder, thereby ensuring the mixing ratio of bone cement monomer and bone cement powder.

[0004] To achieve the above-mentioned purpose, the technical scheme adopted by the present invention is: a multifunctional bone cement filler, comprising: a barrel, a joint is arranged at the lower end of the barrel, a distal plug is blocked in the joint, a filter membrane is arranged in the distal plug, and a clutch is arranged at the upper end of the barrel, the clutch comprising: a base sealed and connected to the barrel, two half nuts are slidably clamped on the base forward and backward, protrusions are arranged at the rear end of one half nut and the front end of the other half nut, a clutch spring is arranged between the two half nuts, a rotary sleeve is rotatably clamped on the base, a rotary cover is arranged on the rotary sleeve, an elliptical clutch hole is arranged on the bottom of the rotary cover, the two half nuts are located in the clutch holes, a screw sleeve is movably inserted in the clutch, the external thread on the screw sleeve matches the internal thread of the two half nuts, and two arc-shaped blocks are symmetrically arranged in the screw sleeve, between the two arc-shaped blocks Two symmetrically arranged give-way grooves are left, and a short sleeve is clamped in the upper part of the screw sleeve, and the short sleeve rests on the top of the two arc-shaped blocks, and two lower bottom grooves are symmetrically arranged at the bottom of the short sleeve, and the two lower bottom grooves are respectively connected with the two give-way grooves, and the upper and lower heights of the give-way grooves are the same as the linear motion stroke of the piston when absorbing a specified volume of bone cement monomer. A booster spring is arranged in the screw sleeve, and a pressurizing component is slidably arranged in the screw sleeve, and two convex balls are symmetrically arranged on the pressurizing component, and the outer diameter of the convex balls is matched with the upper and lower widths of the lower bottom grooves, and the pressurizing component rests on the booster spring. After the pressurizing component compresses the booster spring, the two convex balls are respectively rested on the bottom of the two arc-shaped blocks, and a piston is sealingly and slidingly arranged in the cylinder, and the piston is connected to the pressurizing component, and a stirring component is slidably arranged in the pressurizing component, and the stirring component is connected to the stirring head after passing through the piston.

[0005] Furthermore, in the aforementioned multifunctional bone cement filler, sliders are provided downwardly at the front end of one half nut and the rear end of the other half nut, smooth surfaces are provided on the left and right outer walls at the fractures of the two half nuts, two slide grooves are symmetrically provided front and back on the base, and two sliding blocks are symmetrically provided left and right on the base, the sliders of the two half nuts are respectively slidably clamped in the two slide grooves, and the smooth surfaces of the two half nuts are respectively abutted against the sliding blocks on the corresponding sides.

[0006] Furthermore, the aforementioned multifunctional bone cement filler, wherein two limit columns are symmetrically arranged on the base, and two arc-shaped limit grooves are symmetrically arranged on the bottom of the rotary cover, the centers of the two arc-shaped limit grooves are concentric with the symmetry center of the clutch hole, the two arc-shaped limit grooves on the rotary cover are respectively engaged with the two limit columns, the central angle of the arc-shaped limit grooves is 90°, and a loosening rotation direction indication mark and a locking rotation direction indication mark are arranged on the outer top wall of the rotary cover.

[0007] Furthermore, in the aforementioned multifunctional bone cement filler, a long sleeve is clamped at the lower section of the screw sleeve, the long sleeve rests against the bottom of the two arc-shaped blocks, and two upper top grooves are symmetrically arranged at the top of the long sleeve, the two upper top grooves are respectively connected with the two giveway grooves, and an assist spring is arranged in the long sleeve, and the connected upper top grooves, the giveway grooves and the lower bottom grooves are connected to form a Z-shaped groove, and the upper and lower groove widths of the lower bottom grooves are larger than the outer diameter of the convex balls, and when the pressure component compresses the assist spring so that the two convex balls rest against the bottom of the two arc-shaped blocks respectively, the two convex balls are respectively located in the two upper top grooves.

[0008] Furthermore, the aforementioned multifunctional bone cement filler, wherein the pressurizing component includes: a pressurizing rod and a piston rod, the pressurizing rod extends into the short sleeve and the long sleeve, the pressurizing rod rests on the booster spring, a boss is provided on the top of the pressurizing rod, a pressurizing handle is provided on the boss, a through hole is provided on the pressurizing handle, two convex balls are symmetrically provided on the pressurizing rod, a piston rod is fixedly connected in the pressurizing rod, the piston rod extends through the booster spring and the long sleeve and is connected to the piston, and the stirring component passes through the through hole in the pressurizing handle, the pressurizing rod, the piston rod and the piston in sequence and is connected to the stirring head.

[0009] Furthermore, the aforementioned multifunctional bone cement filler, wherein two clamping blocks are symmetrically arranged on the piston, an L-shaped hole is left between the two clamping blocks, a baffle is arranged at the lower end of the piston rod, the baffle is clamped in the large diameter end of the L-shaped hole, and the piston rod is located in the small diameter end of the L-shaped hole.

[0010] Furthermore, the aforementioned multifunctional bone cement filler, wherein the stirring assembly includes: a stirring rod, an extension rod, the stirring rod sequentially passes through the through hole in the pressure handle, the pressure rod, the piston rod and the piston and is connected to the stirring head, an external thread is provided on the stirring rod, an internal thread hole is provided on the extension rod, the external thread on the stirring rod is threadedly connected with the internal thread hole on the extension rod, a breaking groove is provided on the outer side wall of the extension rod, when the stirring head abuts against the piston, the breaking groove of the extension rod is flush with the top of the pressure handle, and a stirring handle is provided on the top of the extension rod.

[0011] Furthermore, the aforementioned multifunctional bone cement filler, wherein a sealing ring groove is provided at the lower end of the piston, a sealing ring is provided in the sealing ring groove, a blocking cover is embedded in the lower end of the piston, a through hole is provided on the blocking cover, the stirring rod is sealed and fitted with the sealing ring, and the stirring rod is connected to the stirring head after passing through the sealing ring and the blocking cover.

[0012] Furthermore, in the aforementioned multifunctional bone cement filler, two holding handles are symmetrically arranged on the outer side wall of the cylinder.

[0013] The method of using the aforementioned multifunctional bone cement filler is as follows:

[0014] S1. During the production process, a certain amount of bone cement powder is added to the cylinder, and the joint is blocked with a distal plug, and then a clutch is installed on the cylinder, a screw sleeve is arranged in the clutch, a pressurizing component connected to the piston in the cylinder is movably arranged in the screw sleeve, and a stirring component connected to the stirring head is movably arranged in the pressurizing component;

[0015] S2, the joint is tilted upward to make the bone cement powder in the cylinder away from the joint, the distal plug is pulled out, the joint is connected to the device for storing bone cement monomer, the pressurizing component is reversed to align the convex ball on the pressurizing component with the clearance groove, and the pressurizing component is released. Under the action of the booster spring, the pressurizing component and the piston will move rapidly to absorb a certain amount of bone cement monomer, and then the joint is separated from the device for storing bone cement monomer, the distal plug is plugged in the joint again, and the pressurizing component is pressed down and rotated forward to reset the piston;

[0016] S3, holding the stirring assembly and pushing and pulling the stirring head, mixing the bone cement monomer and the bone cement powder in the cylinder through the stirring head to form bone cement;

[0017] S4. Take out the distal plug and connect the nozzle to the joint. First, separate the two half nuts in the clutch so that they are not engaged with the screw sleeve. Push the pressurizing component directly to pressurize it so that the screw sleeve moves with the piston. The piston pushes the bone cement in the cylinder into the nozzle. Finally, inject it through the nozzle. When the injection encounters resistance at the later stage, lock the two half nuts in the clutch to engage with the screw sleeve. Rotate the pressurizing component to drive the screw sleeve and the clutch to generate threaded transmission, and push the bone cement under spiral pressure.

[0018] The advantages of the present invention are as follows: a booster spring is arranged in the screw sleeve, two arc-shaped stoppers are symmetrically arranged in the screw sleeve, a clearance groove with the same upper and lower heights as the linear motion stroke of the piston when absorbing a specified volume of bone cement monomer is reserved between the two arc-shaped stoppers, a short sleeve is arranged on the upper section of the screw sleeve, a lower bottom groove connected to the clearance groove is arranged on the short sleeve, a convex ball is arranged on the pressurizing component, and when the pressurizing component is rotated, the convex ball on the pressurizing component will be aligned with the clearance groove, and then the pressurizing component drives the piston to move forward under the elastic force of the booster spring. The piston can automatically absorb the bone cement monomer when the convex ball in the pressurizing component moves in the clearance groove, and the upper and lower heights of the clearance groove are the same as the linear motion stroke of the piston when absorbing a specified volume of bone cement monomer. In this way, the piston can automatically absorb the specified volume of bone cement monomer, thereby ensuring the absorption accuracy of bone cement and thus ensuring the mixing ratio between bone cement monomer and bone cement powder. When injecting bone cement, the two half nuts in the clutch can be separated from the screw sleeve to push the screw sleeve directly. The pressurized method can be used for rapid injection, and the two half nuts in the clutch can be locked and meshed with the screw sleeve to perform pressurized injection in a spiral pressurized method. When switching between the direct push pressurization method and the spiral pressurization method, only the rotary sleeve needs to be rotated to quickly complete the switch, which is convenient and labor-saving. In order to improve the matching degree between the two half nuts in the clutch and the screw sleeve, an elliptical clutch hole is provided on the bottom of the rotary cover, two limiting columns are symmetrically provided on the base, and two arc-shaped limiting grooves are symmetrically provided on the bottom of the rotary cover, and the center of the two arc-shaped limiting grooves is aligned with the clutch sleeve. The symmetry centers of the engagement holes are concentric, and the two arc-shaped limit grooves on the rotary cover are respectively engaged with the two limit pillars, and the central angle of the arc-shaped limit groove is 90°, so that the rotation angle of the rotary cover can be limited to 90°. When the rotary cover is rotated forward or reversely until the arc-shaped limit groove contacts the limit pillar, it means that the two ends of the short axis of the clutch hole on the rotary cover are pressed against the two half nuts to make them engage, or the two ends of the long axis of the clutch hole are in contact with the two half nuts to separate them. In this way, there will be no situation where the clutch is not fully opened or the engagement is not complete, which affects the direct push pressurization and spiral pressurization. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the multifunctional bone cement filler of the present invention.

[0020] Figure 2 yes Figure 1 Schematic diagram of the cross-sectional structure.

[0021] Figure 3 It is a schematic diagram of the explosion structure of the clutch.

[0022] Figure 4 It is a schematic diagram of the cross-sectional structure of the clutch.

[0023] Figure 5 It is a schematic diagram of the connection structure between the screw sleeve, the short sleeve and the long sleeve.

[0024] Figure 6 It is a schematic diagram of the connection structure between the pressurizing component and the screw sleeve.

[0025] Figure 7 It is a structural schematic diagram in which a piston and a stirring head are connected to a piston rod and a stirring rod respectively. DETAILED DESCRIPTION

[0026] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and preferred embodiments.

[0027] like Figure 1 to Figure 7As shown, the multifunctional bone cement filler of the present invention comprises: a barrel 1, a piston 11 is sealingly and slidably arranged in the barrel 1, two gripping handles 12 are symmetrically arranged on the outer wall of the barrel 1 for easy gripping, a joint 13 is arranged at the lower end of the barrel 1, a distal plug 131 is blocked in the joint 13, a filter membrane 132 is arranged in the distal plug 131, air can penetrate the filter membrane 132, but bone cement powder cannot penetrate the filter membrane 132, after bone cement powder is pre-installed in the barrel 1, the distal plug 131 is used to block the joint 13 to prevent the bone cement powder from falling out, and a clutch 2 is arranged at the upper end of the barrel 1, and the clutch 2 comprises: a base 21 sealed and connected to the barrel 1, two semi-screws are slidably clamped on the base 21 back and forth The nut 22 is provided with a protrusion 221 at the rear end of one half nut 22 and the front end of the other half nut 22, and a smooth surface 222 is provided on the left and right outer walls at the fracture of the two half nuts 22. A slider 223 is provided downwardly at the front end of one half nut 22 and the rear end of the other half nut 22. Two slide grooves 211 are symmetrically provided on the base 21, and the sliders 223 of the two half nuts 22 are respectively slidably clamped in the two slide grooves 211. Two sliding blocks 212 are symmetrically provided on the base 21. The smooth surfaces 222 of the two half nuts 22 are respectively abutted against the sliding blocks 212 on the corresponding sides. A clutch spring 23 is provided between the two half nuts 22, and a rotary sleeve 24 is rotatably clamped on the base 21. The rotary cover 25 is provided with an elliptical clutch hole 251 at the bottom thereof, and the two half nuts 22 are located in the clutch hole 251. When the rotary sleeve 24 is rotated, the rotary cover 25 can be driven to rotate together, thereby driving the clutch hole 251 in the rotary cover 25 to rotate together. When the clutch hole 251 is rotated until the two ends of the short axis respectively abut against the protrusions 221 of the two half nuts 22, the two half nuts 22 overcome the elastic force of the clutch spring 23 and then fit together. When the clutch hole 251 is rotated until the two ends of the long axis are respectively aligned with the protrusions 221 of the two half nuts 22, the two half nuts 22 are separated under the elastic force of the clutch spring 23, and the protrusions 221 on the two half nuts 22 respectively abut against the two ends of the long axis. Two limit posts 21 are symmetrically provided on the base 21. 3. Two arc-shaped limit grooves 252 are symmetrically arranged at the bottom of the rotary cover 25. The centers of the two arc-shaped limit grooves 252 are concentric with the symmetry center of the clutch hole 251. The center angle of the arc-shaped limit grooves 252 is 90°. The two arc-shaped limit grooves 252 on the rotary cover 25 are respectively engaged with the two limit pillars 213, so that the rotation angle of the rotary cover 25 can be limited to 90°. When the rotary cover 25 is rotated forward or reversely until the arc-shaped limit grooves 252 contact the limit pillars 213, it means that the two ends of the short axis of the clutch hole 251 on the rotary cover 25 are pressed against the two half nuts 22 to make them match, or the two ends of the long axis of the clutch hole 251 are in contact with the two half nuts 22 to separate them. A loosening rotation direction indication mark and a locking rotation direction indication mark are arranged on the outer top wall of the rotary cover 25.The two half nuts 22 can be separated by rotating in the direction of the loosening rotation direction indicator, and the two half nuts 22 can be locked together by rotating in the direction of the locking rotation direction indicator.

[0028] A screw sleeve 3 is movably provided in the clutch 2, and the external thread on the screw sleeve 3 matches the internal thread of the two half nuts 22. Two arc-shaped blocks 31 are symmetrically provided in the screw sleeve 3, and two symmetrically provided concession grooves 32 are left between the two arc-shaped blocks 31. A long sleeve 33 is clamped in the lower section of the screw sleeve 3, and the long sleeve 33 abuts against the bottom of the two arc-shaped blocks 31. Two upper top grooves 331 are symmetrically provided on the top of the long sleeve 33. 331 are respectively connected with the two give way grooves 32, a booster spring 34 is arranged in the long sleeve 33, a short sleeve 35 is clamped on the upper part of the screw sleeve 3, the short sleeve 35 abuts against the top of the two arc-shaped blocks 31, and two lower bottom grooves 351 are symmetrically arranged at the bottom of the short sleeve 35, the two lower bottom grooves 351 are respectively connected with the two give way grooves 32, and the connected upper top groove 331, the give way groove 32 and the lower bottom groove 351 are connected to form a Z-shaped groove.

[0029] A pressurizing assembly 4 is slidably arranged in the screw sleeve 3, and the pressurizing assembly 4 includes: a pressurizing rod 41 and a piston rod 42. The pressurizing rod 41 extends into the short sleeve 35 and the long sleeve 33, and the pressurizing rod 41 abuts against the assist spring 34. Two convex balls 411 are symmetrically arranged on the pressurizing rod 41. The outer diameters of the two convex balls 411 are adapted to the upper and lower groove widths of the lower bottom groove 351, but are smaller than the upper and lower groove widths of the upper top groove 331. The two convex balls 411 are slidably arranged in the two give-way grooves 32, respectively. A convex shoulder is arranged on the top of the pressurizing rod 41, and a pressurizing handle 43 is arranged on the convex shoulder. A through hole 431 is provided on the pressure handle 43, and the piston rod 42 extends into the pressure rod 41 and is fixedly connected to the pressure rod 41. The piston rod 42 is inserted into the booster spring 34 and is connected to the piston 11 after passing through the booster spring 34 and the long sleeve 33. Two clamping blocks 111 are symmetrically provided on the piston 11, and an L-shaped hole 112 is left between the two clamping blocks 111. A baffle 421 is provided at the lower end of the piston rod 42, and the baffle 421 is clamped in the large diameter end of the L-shaped hole 112. The piston rod 42 is located in the small diameter end of the L-shaped hole 112, which facilitates the installation between the piston rod 42 and the piston 11. When the pressurizing assembly 4 is pressed down, the pressurizing rod 41 drives the piston rod 42 and the piston 11 to move downward, and the pressurizing rod 41 compresses the assisting spring 34 downward. When the convex ball 411 on the pressurizing rod 41 abuts against the long sleeve 33, the pressurizing handle 43 is rotated, the pressurizing rod 41 rotates forward, and the two convex balls 411 on the pressurizing rod 41 are respectively inserted into the corresponding upper grooves 331. The convex balls 411 located in the upper grooves 331 are blocked by the arc-shaped stopper 31, and the assisting spring 34 is in a compressed state. The pressurizing handle 43 is rotated in the reverse direction, and the pressurizing rod 41 rotates in the reverse direction. When the two convex balls 411 on the pressure rod 41 rotate to abut against the side walls of the upper top groove 331, the two convex balls 411 are aligned with the two make way grooves 32 respectively, and the pressure handle 43 is released. After the convex balls 411 on the pressure rod 41 are unobstructed, the pressure rod 41 will move upward rapidly under the elastic force of the assisting spring 34. At this time, the piston 11 moves upward rapidly with the pressure rod 41 to generate a large suction force until the two convex balls 411 abut against the corresponding two lower bottom grooves 351 in the short sleeve 35 and stop.When the piston 11 moves upward to extract the bone cement monomer, the volume obtained by the rising stroke of the piston 11 multiplied by the bottom area of ​​the cylinder 1 is the volume of the absorbed bone cement monomer. Since the bottom area of ​​the cylinder 1 is fixed, the absorption amount of the bone cement monomer can be controlled by controlling the stroke of the piston 11, and the stroke of the piston 11 is consistent with the stroke of the convex ball 411. The stroke of the convex ball 411 is completed in the clearance groove 32. When the convex ball 411 moves upward in the clearance groove 32 until it abuts against the lower bottom groove 351 of the short sleeve 35, since the upper and lower groove widths of the lower bottom groove 351 are matched with the outer diameter of the convex ball 411, when the convex ball 411 abuts against the lower bottom groove 351, it will not affect the stroke of the convex ball 411 in the clearance groove 32, that is, the upper and lower heights of the clearance groove 32 are determined by the convex ball 411 in the clearance groove. The stroke in the positioning groove 32 is the same as that in the piston 11, so the stroke of the piston 11 can be controlled by controlling the upper and lower heights of the positioning groove 32. During production, the volume of the bone cement monomer required can be known based on the amount of pre-filled bone cement powder, and the movement stroke of the piston 11 can be calculated based on the volume of the bone cement monomer and the bottom area of ​​the cylinder 1. The upper and lower heights of the positioning groove 32, that is, the upper and lower heights of the two arc-shaped blocks 31 are set according to the movement stroke, so that the upper and lower heights of the positioning groove 32 are the same as the linear movement stroke of the piston 11 when absorbing a specified volume of bone cement monomer. When the assist spring 34 pushes the pressurizing component 4, the piston 11 can automatically absorb the specified volume of bone cement monomer, thereby ensuring the absorption accuracy of the bone cement monomer, thereby ensuring the mixing ratio between the bone cement monomer and the bone cement powder.

[0030] When direct push pressurization is required, the two half nuts 22 in the clutch 2 are separated so that the internal threads in the two half nuts 22 do not contact the external threads of the screw sleeve 3, and then the pressurizing rod 41 is pressed down until the two convex balls 411 on the pressurizing rod 41 respectively abut against the two corresponding upper grooves 331 in the long sleeve 33, and then the pressurizing handle 43 is rotated to make the two convex balls 411 on the pressurizing rod 41 screw into the two corresponding upper grooves 331, and the two convex balls 411 are blocked by the two arc-shaped blocks 31 again. At this time, the pressurizing rod 41 abuts against the short sleeve 35, and then the pressurizing handle 43 is pushed downward. The screw sleeve 3 and the piston 11 are driven to move downward together. When spiral pressure is required, the two half nuts 22 in the clutch 2 are locked together so that the internal threads in the two half nuts 22 are meshed with the external threads of the screw sleeve 3. When the two convex balls 411 on the pressure rod 41 are re-inserted into the corresponding upper top grooves 331 and blocked by the two arc-shaped blocks 31, the pressure handle 43 is rotated, and the two convex balls 411 on the pressure rod 41 abut against the long sleeve 33, which can drive the long sleeve 33 and the screw sleeve 3 to rotate together. A threaded transmission can be formed between the screw sleeve 3 and the two half nuts 22, and the piston 11 is pushed downward by the threaded transmission force.

[0031] A stirring assembly 5 is movably provided in the pressurizing assembly 4, and the stirring assembly 5 comprises: a stirring rod 51 and an extension rod 52. The stirring rod 51 sequentially passes through the through hole 431 in the pressurizing handle 43, the pressurizing rod 41, the piston rod 42 and the piston 11, and then extends downward from the piston 11. A sealing ring groove is provided at the lower end of the piston 11, and a sealing ring 113 is provided in the sealing ring groove. A blocking cover 114 is embedded in the lower end of the piston 11, and the blocking cover 114 blocks the sealing ring 113. A through hole is provided on the blocking cover 114. The stirring rod 51 It is sealed with the sealing ring 113, and the stirring rod 51 is connected to the stirring head 53 after passing through the sealing ring 113 and the blocking cover 114. An external thread is arranged on the stirring rod 51, and an internal thread hole is arranged on the extension rod 52. The external thread on the stirring rod 51 is threadedly connected with the internal thread hole on the extension rod 52, and a breaking groove 521 is arranged on the outer side wall of the extension rod 52. When the stirring head 53 abuts against the piston 11, the breaking groove 521 of the extension rod 52 is flush with the top of the pressure handle 43, and a stirring handle 54 is arranged on the top of the extension rod 52.

[0032] By holding the stirring handle 54, the stirring rod 51 and the extension rod 52 can be pulled and pushed up and down, so that the stirring head 53 mixes the materials in the cylinder 1. When the mixing is completed, the stirring head 53 is pulled up until it rests on the piston 11. At this time, the breaking groove 521 of the extension rod 52 is flush with the top of the pressurizing handle 43, and then the extension rod 52 is broken off through the breaking groove 521, so that the extension rod 52 remaining on the stirring rod 51 after breaking does not protrude from the top of the pressurizing handle 43. In this way, when the pressurizing handle 43 is held to push the piston 11, the pressurizing handle 43 will not protrude and hinder the staff from applying pressure to the pressurizing handle 43.

[0033] The specific steps are as follows:

[0034] S1. A distal plug 131 is plugged in the joint 13, and then a certain amount of bone cement powder is added to the barrel 1. The connected pressurizing rod 41 and piston rod 42 are inserted into the short sleeve 35 and the long sleeve 33 in the screw sleeve 3. The pressurizing rod 41 compresses the booster spring 34. The two convex balls 411 on the pressurizing rod 41 are respectively stuck in the two upper top grooves 331 in the long sleeve 33 and blocked by the arc-shaped stopper 31. Then the piston 11 is stuck on the piston rod 42. A stirring rod 51 is inserted in the pressurizing rod 41, the piston rod 42 and the pressurizing handle 43. The stirring rod 51 passes downward through the piston 11 and is connected to the stirring head 53. Then the piston 11 and the stirring head 53 are placed in the barrel 1, and then the clutch 2 is sealed and connected to the barrel 1. The screw sleeve 3 is located in the clutch 2. The extension rod 52 is threadedly connected to the stirring rod 51. This step is completed during the production process.

[0035] S2, the joint 13 is tilted upward to make the bone cement powder in the cylinder 1 away from the joint 13, the distal plug 131 is pulled out, the joint 13 is connected to the device for storing bone cement monomers, the pressurizing handle 43 is held and the pressurizing rod 41 is reversed to align the convex ball 411 on the pressurizing rod 41 with the clearance groove 32, and the pressurizing handle 43 is released. Under the elastic force of the booster spring 34, the pressurizing rod 41 drives the piston rod 42 and the piston 11 to move rapidly. When the convex ball 411 abuts against the short sleeve 35, the piston 11 also stops moving, thereby controlling the movement stroke of the piston 11. By controlling the movement stroke of the piston 11, the volume of the bone cement monomer absorbed can be accurately controlled. Then the joint 13 is detached from the device for storing bone cement monomers, and then the distal plug 131 is plugged in the joint 13 again, and the pressurizing handle 43 is pressed down and turned forward to reset the piston 11, and some of the air in the cylinder 1 is discharged;

[0036] S3, tilt the cylinder 1 so that the joint 13 faces upward, hold the stirring handle 54, push and pull the extension rod 52, the stirring rod 51 and the stirring head 53, the stirring head 53 stirs and mixes the bone cement monomer and the bone cement powder in the cylinder 1, and the bone cement monomer and the bone cement powder are mixed to form bone cement. After the mixing is completed, the stirring head 53 is reset to abut against the piston 11, and then the extension rod 52 is broken so that the extension rod 52 does not protrude from the pressurizing handle 43, and then the piston 11 is pushed and pushed. The piston 11 pushes the bone cement. When the bone cement contacts the filter membrane 132 on the distal plug 131, the piston 11 is continued to be pushed and pushed. The piston 11 cooperates with the filter membrane 132 to pressurize the bone cement, and the air in the bone cement is discharged through the filter membrane 132, so that the bone cement is denser.

[0037] S4. Take out the distal plug 131, connect the nozzle to the joint 13, first separate the two half nuts 22 in the clutch 2 so that they are not engaged with the screw sleeve 3, press the pressurizing handle 43 to push the screw sleeve 3 and the piston 11 to move together, the piston 11 pushes the bone cement in the cylinder 1 into the nozzle, and injects it through the nozzle. When the injection encounters resistance at a later stage, the two half nuts 22 in the clutch 2 are locked together, the two half nuts 22 are engaged with the screw sleeve 3, and then the pressurizing handle 43 is rotated to drive the screw sleeve 3 to rotate together, and thread transmission occurs between the rotating screw sleeve 3 and the two half nuts 22. Under the action of the thread transmission, the screw sleeve 3 can drive the piston 11 to continue pushing the bone cement into the nozzle.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. Multifunctional bone cement filler, including: The cylinder is characterized in that: a joint is arranged at the lower end of the cylinder, a distal plug is blocked in the joint, a filter membrane is arranged in the distal plug, a clutch is arranged at the upper end of the cylinder, the clutch comprises: a base sealed with the cylinder, two half nuts are slidably clamped on the base forward and backward, protrusions are arranged at the rear end of one half nut and the front end of the other half nut, a clutch spring is arranged between the two half nuts, a rotary sleeve is rotatably clamped on the base, a rotary cover is arranged on the rotary sleeve, an elliptical clutch hole is arranged on the bottom of the rotary cover, the two half nuts are located in the clutch holes, a screw sleeve is movably inserted in the clutch, the external thread on the screw sleeve matches the internal thread of the two half nuts, two arc-shaped blocks are symmetrically arranged in the screw sleeve, two symmetrically arranged give way grooves are left between the two arc-shaped blocks, A short sleeve is provided on the upper section of the screw sleeve, and the short sleeve rests on the tops of the two arc-shaped blocks. Two lower bottom grooves are symmetrically arranged at the bottom of the short sleeve, and the two lower bottom grooves are respectively connected with the two make way grooves. The upper and lower heights of the make way grooves are the same as the linear motion stroke of the piston when absorbing a specified volume of bone cement monomer. A booster spring is arranged in the screw sleeve, and a pressurizing assembly is slidably arranged in the screw sleeve. Two convex balls are symmetrically arranged on the pressurizing assembly, and the outer diameter of the convex balls is matched with the upper and lower widths of the lower bottom grooves. The pressurizing assembly rests on the booster spring. After the pressurizing assembly compresses the booster spring, the two convex balls are respectively rested on the bottoms of the two arc-shaped blocks. A piston is sealingly and slidingly arranged in the cylinder body, and the piston is connected to the pressurizing assembly. A stirring assembly is slidably arranged in the pressurizing assembly, and the stirring assembly is connected to the stirring head after passing through the piston.

2. The multifunctional bone cement filler according to claim 1, characterized in that: Slide blocks are arranged downwardly at the front end of one half nut and the rear end of the other half nut, smooth surfaces are arranged on the left and right outer walls at the fractures of the two half nuts, two slide grooves are symmetrically arranged front and back on the base, and two sliding blocks are symmetrically arranged left and right on the base. The slide blocks of the two half nuts are respectively slidably clamped in the two slide grooves, and the smooth surfaces of the two half nuts are respectively abutted against the sliding blocks on the corresponding sides.

3. The multifunctional bone cement filler according to claim 2, characterized in that: Two limit columns are symmetrically arranged on the base, and two arc-shaped limit grooves are symmetrically arranged on the bottom of the rotary cover. The centers of the two arc-shaped limit grooves are concentric with the symmetry center of the clutch hole. The two arc-shaped limit grooves on the rotary cover are respectively engaged with the two limit columns, and the central angle of the arc-shaped limit grooves is 90°. A loosening rotation direction indicator mark and a locking rotation direction indicator mark are arranged on the outer top wall of the rotary cover.

4. The multifunctional bone cement filler according to claim 1, characterized in that: A long sleeve is provided at the lower section of the screw sleeve, and the long sleeve rests against the bottom of the two arc-shaped blocks. Two upper grooves are symmetrically provided at the top of the long sleeve, and the two upper grooves are respectively connected with the two give-way grooves. An assist spring is provided in the long sleeve, and the connected upper grooves, the give-way grooves and the lower bottom grooves are connected to form a Z-shaped groove. The upper and lower groove widths of the lower bottom groove are larger than the outer diameter of the convex ball. When the pressure component compresses the assist spring so that the two convex balls rest against the bottom of the two arc-shaped blocks respectively, the two convex balls are respectively located in the two upper grooves.

5. The multifunctional bone cement filler according to claim 4, characterized in that: The pressurizing assembly includes: a pressurizing rod and a piston rod. The pressurizing rod extends into a short sleeve and a long sleeve, the pressurizing rod rests on a booster spring, a boss is provided on the top of the pressurizing rod, a pressurizing handle is provided on the boss, a through hole is provided on the pressurizing handle, two convex balls are symmetrically provided on the pressurizing rod, a piston rod is fixedly connected in the pressurizing rod, the piston rod extends through the booster spring and the long sleeve and is connected to the piston, and the stirring assembly passes through the through hole in the pressurizing handle, the pressurizing rod, the piston rod and the piston in sequence and is connected to the stirring head.

6. The multifunctional bone cement filler according to claim 5, characterized in that: Two clamping blocks are symmetrically arranged on the piston, an L-shaped hole is left between the two clamping blocks, a baffle is arranged at the lower end of the piston rod, the baffle is clamped in the large diameter end of the L-shaped hole, and the piston rod is located in the small diameter end of the L-shaped hole.

7. The multifunctional bone cement filler according to claim 5, characterized in that: The stirring assembly includes: a stirring rod and an extension rod. The stirring rod passes through the through hole in the pressure handle, the pressure rod, the piston rod and the piston in sequence and is connected to the stirring head. An external thread is arranged on the stirring rod, and an internal thread hole is arranged on the extension rod. The external thread on the stirring rod is threadedly connected with the internal thread hole on the extension rod. A breaking groove is arranged on the outer side wall of the extension rod. When the stirring head abuts against the piston, the breaking groove of the extension rod is flush with the top of the pressure handle, and a stirring handle is arranged on the top of the extension rod.

8. The multifunctional bone cement filler according to claim 7, characterized in that: A sealing ring groove is arranged at the lower end of the piston, a sealing ring is arranged in the sealing ring groove, a blocking cover is embedded in the lower end of the piston, a through hole is arranged on the blocking cover, the stirring rod is sealed and fitted with the sealing ring, and the stirring rod is connected with the stirring head after passing through the sealing ring and the blocking cover.

9. The multifunctional bone cement filler according to claim 1, characterized in that: Two holding handles are symmetrically arranged on the outer side wall of the cylinder.

10. A method for using the multifunctional bone cement filler according to any one of claims 1 to 9, characterized in that: The specific steps are as follows: S1. During the production process, a certain amount of bone cement powder is added to the cylinder, and the joint is blocked with a distal plug, and then a clutch is installed on the cylinder, a screw sleeve is arranged in the clutch, a pressurizing component connected to the piston in the cylinder is movably arranged in the screw sleeve, and a stirring component connected to the stirring head is movably arranged in the pressurizing component; S2, the joint is tilted upward to make the bone cement powder in the cylinder away from the joint, the distal plug is pulled out, the joint is connected to the device for storing bone cement monomer, the pressurizing component is reversed to align the convex ball on the pressurizing component with the clearance groove, and the pressurizing component is released. Under the action of the booster spring, the pressurizing component and the piston will move rapidly to absorb a certain amount of bone cement monomer, and then the joint is separated from the device for storing bone cement monomer, the distal plug is plugged in the joint again, and the pressurizing component is pressed down and rotated forward to reset the piston; S3, holding the stirring assembly and pushing and pulling the stirring head, mixing the bone cement monomer and the bone cement powder in the cylinder through the stirring head to form bone cement; S4. Take out the distal plug and connect the nozzle to the joint. First, separate the two half nuts in the clutch so that they are not engaged with the screw sleeve. Push the pressurizing component directly to pressurize it so that the screw sleeve moves with the piston. The piston pushes the bone cement in the cylinder into the nozzle. Finally, inject it through the nozzle. When the injection encounters resistance at the later stage, lock the two half nuts in the clutch to engage with the screw sleeve. Rotate the pressurizing component to drive the screw sleeve and the clutch to generate threaded transmission, and push the bone cement under spiral pressure.

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