Bone cement filling device capable of switching materials in different areas

Abstract

The invention provides a bone cement filling device capable of switching materials in different areas, and belongs to the technical field of medical instruments, and the device comprises a mounting frame, an air spring, an on-off mechanism, an adjusting mechanism, a supporting mechanism and a filling mechanism. Wherein the gas spring is detachably assembled in the mounting frame and is used for providing stable pressure in the conveying process of bone cement; the on-off mechanism is connected with the fluid channel of the gas spring and used for accurately controlling opening and closing of the fluid channel of the gas spring; the adjusting mechanism is arranged on the mounting frame and is in transmission connection with the gas spring, the adjusting mechanism comprises an eccentric rubber block, and the eccentric rubber block can rotate and is used for adjusting the moving speed of the output end of the gas spring; and the supporting mechanism is fixedly arranged on the mounting frame and used for supporting the filling mechanism and achieving position switching of the filling mechanism. According to the device, bone cement conveying pressure can be stably provided, it is ensured that the filling amount is uniform, the model forming precision is improved, bone cement with different viscosities can be conveniently switched, and wound regional accurate filling is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a bone cement filling device capable of switching materials in different regions. BACKGROUND

[0002] Bone cement filling is a minimally invasive or auxiliary treatment technology widely used in the field of orthopedics and neurosurgery. The core is to inject special bone cement material into bone defects, lesion areas or vertebral bodies to achieve the purpose of stabilizing bones, relieving pain and restoring function. Its core characteristics are "self-curing", "load-bearing" and "biocompatibility". In many orthopedic scenarios, it is mainly used to treat vertebral compression fractures, "prosthesis fixation" in artificial joint replacement, fill bone cavities and restore bone structure.

[0003] Bone cement is not only used for orthopedic treatment, but also can be used in special wounds such as irregular deep pits after hip debridement. In the repair process, a contrast model is made to guide autologous tissue transplantation, which requires high model accuracy. However, irregular wounds have filling blind spots, and overall injection can easily cause uneven distribution of bone cement or cavities, so the clinical practice adopts a regional injection logic. Current regional injection of bone cement relies on traditional manual filling methods, and it is difficult to accurately control the filling pressure. If the filling pressure is too high, it can cause extrusion or damage to the fragile tissues and blood vessels around the wound. If the pressure is too low, the flowability of the bone cement is insufficient, affecting the filling and solidification. The experience dependence on the operator is high, which leads to insufficient stability of the model accuracy. Therefore, there is an urgent need for a bone cement filling device capable of switching materials in different regions and accurately controlling the filling pressure. SUMMARY

[0004] The present application aims to at least solve one of the problems in the prior art or related art.

[0005] To this end, the present application provides a bone cement filling device capable of switching materials in different regions, which can stably provide bone cement delivery pressure, ensure uniform filling volume, improve model forming accuracy, and facilitate switching between different viscosity bone cements.

[0006] The application provides a cement filling device for subarea switching, which comprises a mounting frame, an air spring, an on-off mechanism, an adjusting mechanism, a supporting mechanism and a filling mechanism. The air spring is detachably assembled in the mounting frame, and is used for providing stable pressure for the delivery process of the cement. The on-off mechanism is connected with the fluid channel of the air spring, and is used for accurately controlling the opening and closing of the fluid channel of the air spring. The adjusting mechanism is arranged on the mounting frame and is in transmission connection with the air spring. The adjusting mechanism comprises an eccentric rubber block, and the eccentric rubber block is rotatable and is used for adjusting the moving speed of the output end of the air spring. The supporting mechanism is fixedly arranged on the mounting frame, and is used for supporting the filling mechanism and realizing the position switching of the filling mechanism. The three filling mechanisms are rotatably arranged on the supporting mechanism, each of the filling mechanisms comprises a storage cylinder, different viscosity cements are respectively stored in the storage cylinders, and the feeding end of one of the storage cylinders is correspondingly connected with the output end of the air spring.

[0007] In some embodiments, the mounting frame comprises a supporting frame in a U-shaped structure, a handle fixedly arranged at the bottom of the supporting frame, and a fixed cover slidingly arranged on the supporting frame.

[0008] In some embodiments, the air spring comprises an outer cylinder arranged in the supporting frame, a fixed block fixedly arranged at one end of the outer cylinder, an inner cylinder arranged in the inner cylinder and in sealing connection with the fixed block, a control valve penetratingly arranged in the fixed block, a gas channel being formed in the fixed block and connecting the outer cylinder with the cavity of the inner cylinder, the control valve being slidingly arranged in the gas channel, and a blocking block being arranged at the end of the control valve.

[0009] In some embodiments, the air spring further comprises a first piston slidingly arranged on the inner wall of the inner cylinder, an extension rod fixedly arranged at the end of the first piston away from the control valve, and a sealing block fixedly arranged on the inner wall of the outer cylinder, and a through hole being formed in the sealing block and penetrating through the extension rod.

[0010] In some embodiments, the on-off mechanism comprises a fixed seat fixedly arranged at one end of the outer cylinder close to the control valve, a lever rotatably arranged on the fixed seat, a groove frame fixedly connected with the lever, a connecting seat fixedly connected with the control valve, connecting columns being arranged at the two sides of the connecting seat, and sliding grooves being formed in the two sides of the groove frame and being adapted to the connecting columns, and the connecting columns being slidingly embedded in the sliding grooves.

[0011] In some embodiments, the adjusting mechanism comprises: a mounting base fixedly arranged on the top of the fixed cover, a rotating shaft rotatably arranged inside the mounting base; a rotating wheel fixedly arranged on the rotating shaft of the mounting base, the eccentric rubber block is fixedly sleeved on the rotating wheel; a finger ring arranged on one end of the rotating shaft; a torsional spring arranged between the rotating wheel and the mounting base; a speed adjusting frame slidingly arranged inside the mounting base and fixedly connected with the telescopic rod, the eccentric rubber block is in contact with the speed adjusting frame, and one end of the speed adjusting frame away from the telescopic rod is provided with a pull handle.

[0012] In some embodiments, the supporting mechanism comprises: a cross frame fixedly connected with the fixed cover; a limiting ring fixedly arranged on one end of the cross frame away from the fixed cover; a mounting ring rotatably arranged in the limiting ring; three positioning recesses uniformly and spacedly arranged on the outer circumferential surface of the mounting ring; and a positioning rubber column penetrating through the side wall of the limiting ring and embedded into the corresponding positioning recess.

[0013] In some embodiments, each of the filling mechanisms comprises: a storage cylinder arranged in the mounting ring; a second piston slidingly arranged on the inner wall of the storage cylinder; a pressing piece fixedly arranged on one end of the second piston close to the gas spring, and the pressing piece is matched with the telescopic rod; and an injection pipe assembled on the output end of the storage cylinder.

[0014] In some embodiments, a sealing ring is arranged between the outer cylinder and the inner cylinder.

[0015] In some embodiments, the storage cylinder is of a transparent structure, and a dose scale line is uniformly and axially engraved on the outer wall of the storage cylinder.

[0016] Compared with the prior art, the above technical solution provided by the present application has at least the following technical effects: The bone cement filling device for switching the filling area provided by the application can stably provide the bone cement conveying pressure, ensure the uniform filling amount, improve the model forming precision, and facilitate switching different viscosity bone cements. Three storage barrels are filled with bone cements with corresponding required viscosity, the filling mechanism position is adjusted through the supporting mechanism, the feeding end of the first storage barrel to be used is butted with the air spring output end, the air spring is stably assembled in the mounting frame, the on-off mechanism is opened, the fluid channel of the air spring is in the open state, the air spring outputs stable pressure after the fluid channel is conducted, the pressure is transmitted to the butted storage barrel feeding end through the air spring output end, the bone cement in the storage barrel is pushed to move in the output direction, the bone cement is finally injected into the target area of the wound from the storage barrel output end, and the output speed of the air spring output end is reduced during the movement, at this time, the operator manually rotates the eccentric rubber block and fixes the position of the eccentric rubber block, so that the movement of the air spring output end is kept at an appropriate speed. When the bone cement with another viscosity needs to be switched, the fluid channel of the air spring is kept open, the output end of the air spring is manually pulled back to move until it returns to the initial position, the eccentric rubber block can automatically lock the movement of the air spring output end, so that the filling mechanism position is adjusted through the rotation of the supporting mechanism, the feeding end of the storage barrel filled with the bone cement with the target viscosity is butted with the air spring output end again, and the above steps are repeated until the precise filling of the wound in the area is completed. The air spring provides stable pressure for the bone cement conveying, avoids the problems of overfilling or underfilling of the bone cement caused by pressure fluctuation during manual filling, ensures the uniform filling amount of the bone cement in each area, and improves the model forming precision.

[0017] Additional aspects and advantages of the application will become apparent from the following description with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0018] The above and / or additional aspects and advantages of the application will become apparent and be readily appreciated from the following description, taken in conjunction with the accompanying drawings, in which: Figure 1 The overall structure schematic diagram of the filling device for some embodiments of the application; Figure 2 The structure schematic diagram of the mounting frame and the outer cylinder for some embodiments of the application; Figure 3 The structure schematic diagram of the mounting frame for some embodiments of the application; Figure 4 The plane structure schematic diagram of the air spring for some embodiments of the application; Figure 5 The structure schematic diagram of the air spring and the on-off mechanism for some embodiments of the application; Figure 6 The structure schematic diagram of the adjusting mechanism and the air spring for some embodiments of the application; Figure 7 Structure diagram of the adjusting mechanism for some embodiments of the present application; Figure 8 Structure diagram of the supporting mechanism for some embodiments of the present application; Figure 9 Structure diagram of the positioning glue column for some embodiments of the present application; Figure 10 Structure diagram of the mounting ring and the positioning concave hole for some embodiments of the present application; Figure 11 Structure diagram of the filling mechanism for some embodiments of the present application; Figure 12 Structure diagram of the second piston and the telescopic rod for some embodiments of the present application.

[0019] In the drawings, Figures 1 to 12 The correspondence between the reference signs and the component names in the drawings is as follows: 100, mounting frame; 110, supporting frame; 120, handle; 130, fixed cover; 200, gas spring; 210, outer cylinder; 220, fixed block; 230, inner cylinder; 240, control valve; 250, first piston; 260, telescopic rod; 270, sealing block; 300, on-off mechanism; 310, fixed seat; 320, lever; 330, slot frame; 340, connecting seat 400, adjusting mechanism; 410, mounting seat; 420, rotating wheel; 430, finger ring; 440, eccentric glue block; 450, torsional spring; 460, speed regulating frame; 500, supporting mechanism; 510, cross frame; 520, limiting ring; 530, mounting ring; 531, positioning concave hole; 540, positioning glue column; 600, filling mechanism; 610, storage cylinder; 620, second piston; 630, extrusion piece; 640, injection tube. DETAILED DESCRIPTION

[0020] In order to enable the above objects, features and advantages of the present application to be more clearly understood, the following will further describe the present application with reference to the drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0021] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application, but the present application can also be implemented in other ways different from those described herein, and therefore, the scope of protection of the present application is not limited by the specific embodiments disclosed below.

[0022] The following will be described with reference to the drawings. Figures 1 to 12This application describes a bone cement filling device for regional switching material provided according to some embodiments.

[0023] like Figure 1 As shown, the bone cement filling device for regional switching material provided according to some embodiments of this application includes a mounting frame 100, a gas spring 200, an on / off mechanism 300, an adjusting mechanism 400, a supporting mechanism 500, and a filling mechanism 600. The system includes a gas spring 200, detachably mounted within the mounting frame 100, which provides stable pressure for the delivery of bone cement; an on / off mechanism 300, connected to the fluid channel of the gas spring 200, which precisely controls the opening and closing of the fluid channel; an adjustment mechanism 400, mounted on the mounting frame 100 and connected to the gas spring 200, which includes an eccentric rubber block 440 that is rotatable to adjust the moving speed of the output end of the gas spring 200; a support mechanism 500, fixedly mounted on the mounting frame 100, which supports the filling mechanism 600 and enables its position switching; and three filling mechanisms 600, rotatably mounted on the support mechanism 500. Each filling mechanism 600 includes a storage cylinder 610, which stores bone cement of different viscosities, and the inlet end of one of its storage cylinders 610 is connected to the output end of the gas spring 200.

[0024] In this embodiment, three storage cylinders 610 are respectively filled with bone cement of the required viscosity. The position of the filling mechanism 600 is then adjusted by the support mechanism 500 so that the feed end of the first storage cylinder 610 is aligned with the output end of the gas spring 200. Simultaneously, the gas spring 200 is stably assembled within the mounting frame 100. The on / off mechanism 300 is opened, opening the fluid channel of the gas spring 200. After the fluid channel is open, the gas spring 200 outputs stable pressure. This pressure is transmitted through the output end of the gas spring 200 to the feed end of the aligned storage cylinder 610, pushing the bone cement within the storage cylinder 610 towards the output direction. The bone cement is ultimately injected into the target wound area from the output end of the storage cylinder 610. Simultaneously, during the movement of the gas spring 200's output end… Friction with the eccentric rubber block 440 will cause the eccentric rubber block 440 to rotate, and the output speed will decrease. At this time, the operator needs to manually rotate the eccentric rubber block 440 and fix its position to ensure that the output end of the gas spring 200 moves at an appropriate speed. When it is necessary to switch to bone cement of another viscosity, keep the fluid channel of the gas spring 200 open and manually pull the output end of the gas spring 200 backward until it returns to the initial position. The eccentric rubber block 440 can automatically lock the movement of the output end of the gas spring 200, thereby adjusting the position of the filling mechanism 600 by rotating the support mechanism 500, so that the feed end of the storage cylinder 610 containing the target viscosity bone cement is reconnected with the output end of the gas spring 200. Repeat the above steps until the precise filling of the entire wound area is completed.

[0025] In the design, the gas spring 200 provides stable pressure for the cement delivery, avoids the problem of overfilling or underfilling caused by pressure fluctuation during manual filling, ensures the uniformity of cement filling amount in each area, and improves the model forming precision.

[0026] In some possible embodiments, as shown in Figure 2 、 Figure 3 , the mounting frame 100 includes: a support frame 110 in a U-shaped structure; a handle 120 fixedly arranged at the bottom of the support frame 110; and a fixed cover 130 slidingly arranged on the support frame 110.

[0027] In this embodiment, the support frame 110 serves as a core framework, carries the gas spring 200 and defines the position; the handle 120 is based on the support frame 110 and the stable gripping point, facilitating the movement and operation of the device; the fixed cover 130 is slidingly matched with the support frame 110 to fix the gas spring 200 and provide a mounting base for the adjusting mechanism 400; and the mounting frame 100 as a whole is used to provide a basic support frame.

[0028] In some possible embodiments, as shown in Figure 4 、 Figure 5 , the gas spring 200 includes: an outer cylinder 210 arranged in the support frame 110; a fixed block 220 fixedly arranged at one end of the outer cylinder 210; an inner cylinder 230 arranged inside the outer cylinder 210 and sealingly connected with the fixed block 220; a control valve 240 penetratingly arranged inside the fixed block 220, the fixed block 220 being provided with a gas passage that communicates the chambers of the outer cylinder 210 and the inner cylinder 230, the control valve 240 being slidingly arranged in the gas passage and provided with a plugging block at the end thereof; a first piston 250 slidingly arranged on the inner wall of the inner cylinder 230; an extension rod 260 fixedly arranged at the end of the first piston 250 away from the control valve 240; and a sealing block 270 fixedly arranged on the inner wall of the outer cylinder 210 and provided with a through hole for the extension rod 260 to pass through.

[0029] In this embodiment, in the initial state, the outer cylinder 210 is filled with high-pressure nitrogen gas of the same pressure at both ends of the first piston 250, the blocking block at the end of the control valve 240 is tightly attached to the communication port of the gas channel and the inner cylinder 230, and at this time, the compressed gas is stored in the annular gap chamber between the outer cylinder 210 and the inner cylinder 230. When it is necessary to deliver bone cement, the operator drives the control valve 240 to slide along the gas channel through the on-off mechanism 300, and the blocking block at the end is synchronously away from the communication port, and the gas channel is conducted. Because the area of the rodless end of the piston is larger than that of the rod end, according to the principle of "pressure = pressure × area", the thrust generated by the rodless end is greater than the counter-thrust of the rod end, forming a resultant force towards the end of the telescopic rod 260, pushing the first piston 250 to move along the axis of the inner cylinder 230 to the end of the telescopic rod 260, and the telescopic rod 260 extends outward. During the movement of the first piston 250 to the end of the telescopic rod 260, the volume of the chamber at the rod end gradually decreases, and the internal gas continuously presses into the annular gap chamber of the outer cylinder 210 through the through hole of the inner cylinder 230, and then replenishes the chamber at the rodless end through the gas channel, forming a continuous circulation of gas, ensuring that the chamber at the rodless end always maintains a stable pressure, and the first piston 250 moves at a constant speed, and the telescopic rod 260 extends at a constant speed and contacts the feeding end of the storage cylinder 610, uniformly extruding the bone cement, so that the bone cement is injected into the wound at a stable rate, avoiding uneven filling caused by fluctuation of the thrust, and after the bone cement is filled, the on-off mechanism 300 is operated in reverse to drive the control valve 240 to slide, and the blocking block tightly presses the gas channel again. The channel is closed, and the high-pressure space at both ends of the first piston 250 is closed respectively, and it is difficult to be further compressed, and the first piston 250 stops moving.

[0030] In some possible embodiments, as shown in Figure 5 The on-off mechanism 300 includes a fixed seat 310 fixedly arranged at one end of the outer cylinder 210 close to the control valve 240, a lever 320 rotatably arranged on the fixed seat 310, a groove frame 330 fixedly connected with the lever 320, a connecting seat 340 fixedly connected with the control valve 240, and connecting columns arranged on both sides of the connecting seat 340, and sliding grooves adapted to the connecting columns are formed in both sides of the groove frame 330.

[0031] In this embodiment, when it is necessary to start the gas spring 200 to deliver pressure, the operator rotates the holding end of the lever 320 downward, and the lever 320 rotates downward around the pin shaft of the fixed seat 310, driving the groove frame 330 fixedly connected therewith to rotate synchronously, and when the groove frame 330 rotates, the sliding grooves in the groove frame 330 slide relative to the connecting columns of the connecting seat 340, and the sliding grooves generate a thrust along the axis of the outer cylinder 210 towards the inside of the connecting seat 340 through the connecting columns, and the connecting seat 340 drives the control valve 240 to slide along the axis of the gas channel outward, so that the blocking block at the end of the control valve 240 is away from the communication port of the gas channel, and the gas channel is conducted. When it is necessary to stop the delivery of bone cement, the lever 320 is rotated in reverse, and the blocking block of the control valve 240 is tightly attached to the communication port again.

[0032] In some possible embodiments, as shown in Figure 6 、 Figure 7 , the adjusting mechanism 400 comprises: a mounting seat 410 fixedly arranged on the top of the fixed cover 130, a rotating shaft rotatably arranged inside the mounting seat 410; a rotating wheel 420 fixedly arranged on the rotating shaft of the mounting seat 410, an eccentric rubber block 440 fixedly sleeved on the rotating wheel 420; a finger ring 430 arranged at one end of the rotating shaft; a torsional spring 450 arranged between the rotating wheel 420 and the mounting seat 410; a speed regulating frame 460 slidably arranged inside the mounting seat 410 and fixedly connected with the telescopic rod 260, the eccentric rubber block 440 being in contact with the speed regulating frame 460, and a handle being arranged at the end of the speed regulating frame 460 away from the telescopic rod 260.

[0033] In this embodiment, the telescopic rod 260 moves towards the filling mechanism 600 under the action of the gas pressure, drives the speed regulating frame 460 fixedly connected therewith to move synchronously along the sliding cavity of the mounting seat 410, the friction force surface of the speed regulating frame 460 being in contact with the eccentric rubber block 440, the speed regulating frame 460 being driven to rotate the eccentric rubber block 440 around the rotating shaft when the speed regulating frame 460 moves, the eccentric rubber block 440 being gradually rotated from the short radius end to the long radius end to be in contact with the speed regulating frame 460, the extrusion force of the eccentric rubber block 440 on the speed regulating frame 460 being gradually increased, the resistance of the telescopic rod 260 being continuously increased synchronously as the telescopic rod 260 continues to move, the speed of the bone cement delivery being correspondingly slowed down, the operator observing the extrusion rate of the bone cement from the storage cylinder 610 to determine whether the current rate is suitable for the filling requirement of the wound, rotating the finger ring 430 clockwise to drive the eccentric rubber block 440 to rotate further and increase the extrusion force if the rate is too fast, the moving speed of the telescopic rod 260 being adjusted to the target value, and rotating the finger ring 430 counterclockwise to adjust the rate if the rate is too slow, the operator continuously observing the extrusion rate of the bone cement until the rate is stabilized in the appropriate range, the bone cement being delivered at a constant speed.

[0034] In some possible embodiments, as shown in Figures 8 to 11 , the supporting mechanism 500 comprises: a cross frame 510 fixedly connected with the fixed cover 130; a limiting ring 520 fixedly arranged at the end of the cross frame 510 away from the fixed cover 130; a mounting ring 530 rotatably arranged in the limiting ring 520; three positioning concave holes 531 uniformly and spacedly arranged on the outer circumferential surface of the mounting ring 530; and a positioning rubber column 540 penetrating through the side wall of the limiting ring 520 and embedded in the corresponding positioning concave hole 531.

[0035] In this embodiment, in the initial state, the positioning glue column 540 is embedded in one of the positioning recesses 531 of the mounting ring 530, and the mounting ring 530 is locked in the initial position. The feeding end of the cartridge 610 corresponding to the positioning recess 531 is precisely connected with the telescopic rod 260 of the gas spring 200. When it is needed to switch to another viscosity of bone cement filling, the operator removes the positioning glue column 540 from the current positioning recess 531, and rotates the cartridge 610 in the limiting ring 520 under the driving of the mounting ring 530. When the rotation is 120°, the lower positioning recess 531 is rotated to the position aligned with the through hole of the limiting ring 520. At this time, the positioning glue column 540 is embedded in the new positioning recess 531 through the limiting ring 520, and the mounting ring 530 is locked again. The switching process is completed, and the mounting ring 530 is locked. The feeding end of the cartridge 610 corresponding to the viscosity of bone cement is coaxially connected with the telescopic rod 260 of the gas spring 200.

[0036] In some possible embodiments, as shown in Figure 11 , Figure 12 Each filling mechanism 600 includes a cartridge 610 arranged in the mounting ring 530, a second piston 620 slidingly arranged on the inner wall of the cartridge 610, a pressing piece 630 fixedly arranged on one end of the second piston 620 close to the gas spring 200, and the pressing piece 630 is matched with the telescopic rod 260, and an injection pipe 640 assembled at the output end of the cartridge 610.

[0037] In this embodiment, through the switching operation of the supporting mechanism 500, the cartridge 610 containing the target viscosity of bone cement is rotated to the working position, and the cartridge 610 is aligned with the telescopic rod 260 of the gas spring 200. The operator opens the gas passage of the gas spring 200 through the on-off mechanism 300. The gas in the gas spring 200 circulates to make the telescopic rod 260 extend to the cartridge 610. The end of the telescopic rod 260 is precisely embedded in the connecting groove of the pressing piece 630. With the continuous output pressure of the gas spring 200, the telescopic rod 260 applies a stable pushing force to the pressing piece 630 through the connecting groove. The pressing piece 630 drives the second piston 620 to slide along the inner wall of the cartridge 610 in the direction of the injection pipe 640. The bone cement flows out of the injection pipe 640 for filling.

[0038] In some possible embodiments, as shown in Figure 4 The fixed block 220 is provided with a sealing ring between the outer cylinder 210 and the inner cylinder 230.

[0039] In this embodiment, when the gas spring 200 works, the annular gap chamber between the outer cylinder 210 and the inner cylinder 230 and the inner chamber of the inner cylinder 230 need to maintain stable compressed gas pressure. The sealing ring realizes the sealing of the gas cavity to avoid the fluctuation of the bone cement conveying rate caused by pressure leakage.

[0040] In some possible embodiments, the cartridge 610 is a transparent structure, and the dose scale lines are uniformly marked along the outer wall of the cartridge 610 in the axial direction.

[0041] In this embodiment, the transparent structure cartridge 610 facilitates the operator to observe the state of the bone cement and the position of the piston, and at the same time, the operator can observe the current output of the bone cement metering with the aid of the metering scale lines, so as to avoid the dose deviation caused by experience judgment.

[0042] When the bone cement filling device of the sub-region switching material is in operation, the corresponding viscosity bone cement is injected into each storage cylinder 610. When filling, the operator holds the bottom handle 120 of the installation frame 100 to stabilize the device, rotates the toggle lever 320 of the on-off mechanism 300 downward, the toggle lever 320 rotates around the pin shaft of the fixed seat 310, drives the synchronous movement of the groove frame 330, the connecting column pushes the connecting seat 340 and the control valve 240 to slide along the gas channel through the sliding groove of the groove frame 330, the end blocking block of the control valve 240 is away from the communication port, the gas channel is open, because the area of the rodless end of the piston is larger than that of the rod end, the thrust of the rodless end is greater than the counter-thrust of the rod end, the first piston 250 is pushed to move towards the end of the telescopic rod 260, the telescopic rod 260 is extended, at the same time, the gas in the rod end cavity of the first piston 250 enters the annular gap cavity through the through hole of the inner cylinder 230, and then is supplemented to the rodless end, forming continuous gas circulation, ensuring that the telescopic rod 260 extends at a constant speed, and the telescopic rod 260 drives the speed regulating frame 460 to move synchronously when it is extended, the force receiving surface of the speed regulating frame 460 rubs against the eccentric rubber block 440, driving the eccentric rubber block 440 to rotate around the rotating shaft, the eccentric rubber block 440 is subjected to the turning from the short radius end to the long radius end, and the extrusion force on the speed regulating frame 460 gradually increases, the resistance of the telescopic rod 260 increases, and the bone cement conveying rate slows down. The operator observes the extrusion state of the bone cement through the transparent storage cylinder 610, if the rate is too fast, the index ring 430 is rotated clockwise, driving the eccentric rubber block 440 to further rotate and be fixed at the position, the extrusion force is increased, and the speed of the telescopic rod 260 is reduced, if the rate is too slow, the index ring 430 is counterclockwise, after the bone cement of the current viscosity is filled, the operator manually pulls the speed regulating frame 460 handle backward, driving the telescopic rod 260 and the first piston 250 to return to the initial position, at this time, no external force is applied to the index ring 430, the torsional spring 450 of the eccentric rubber block 440 restores the elastic potential energy, the long radius end of the eccentric rubber block 440 extrudes the speed regulating frame 360, the speed regulating frame 360 is locked, the position of the telescopic rod 260 is fixed, the positioning rubber column 540 of the supporting mechanism 500 is taken out, so as to be separated from the current positioning concave hole 531, the installation ring 530 is rotated to drive the three storage cylinders 610 to rotate synchronously by 120°, when the feeding end of the storage cylinder 610 of the target viscosity is aligned with the telescopic rod 260, the positioning rubber column 540 is embedded into the corresponding positioning concave hole 531, and the installation ring 530 is locked, at this time, the extrusion piece 630 of the new storage cylinder 610 is precisely matched with the end of the telescopic rod 260, the viscosity switching is completed, the above process is repeated, the bone cement of three viscosities is switched according to the needs of different regions of the wound, the bone cement is precisely injected into the target region through the injection pipe 640, after the injection is completed, the toggle lever 320 of the on-off mechanism 300 is rotated in the reverse direction, the blocking block of the control valve 240 is pressed tightly to the gas channel again, the gas channel is closed, the high-pressure space at both ends of the first piston 250 is closed respectively, it is difficult to be further compressed, the position of the telescopic rod 260 is fixed, and the injection is closed.

[0043] In the present application, it should be noted that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0044] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0045] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through intermediate medium. The term "plurality" refers to two or more, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0046] In the present application, unless otherwise explicitly specified and limited, the first feature "on" or "under" the second feature can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0047] In the present application, the description of the terms "one embodiment", "some embodiments", "a specific embodiment" and the like means 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 application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0048] The above descriptions are only the preferred embodiments of the present application, and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, and the like made within the principle and technical scope of the present application should be included in the protection scope of the present application.

Claims

1. A bone cement filling device for regional material switching, characterized in that, include: Mounting frame; A gas spring, detachably mounted within the mounting frame, is used to provide stable pressure during the delivery of bone cement. An on / off mechanism, connected to the fluid channel of the gas spring, is used to precisely control the opening and closing of the fluid channel of the gas spring; An adjustment mechanism is provided on the mounting frame and is connected to the gas spring via a transmission. The adjustment mechanism includes an eccentric rubber block, which is rotatable to adjust the moving speed of the output end of the gas spring. A support mechanism is fixedly mounted on the mounting frame to support the filling mechanism and enable its position switching; Three filling mechanisms are rotatably mounted on the support mechanism. Each filling mechanism includes a storage cylinder containing bone cement of different viscosities. The inlet end of one of the storage cylinders is connected to the outlet end of the gas spring.

2. The bone cement filling device for regional switching material according to claim 1, characterized in that, The mounting frame includes: The support frame is U-shaped; A handle is fixedly installed at the bottom of the support frame; The fixed cover is slidably mounted on the support frame.

3. The bone cement filling device for regional switching material according to claim 2, characterized in that, The gas spring includes: The outer cylinder is installed inside the support frame; A fixing block is fixedly installed at one end of the outer cylinder; The inner cylinder is disposed inside the outer cylinder and is sealed to the fixing block; A control valve is installed inside the fixed block. A gas channel is provided inside the fixed block, which connects the outer cylinder and the inner cylinder. The control valve is slidably installed in the gas channel, and a sealing block is provided at the end of the control valve.

4. The bone cement filling device for regional switching material according to claim 3, characterized in that, The gas spring also includes: The first piston is slidably disposed on the inner wall of the inner cylinder; A telescopic rod is fixedly installed at the end of the first piston away from the control valve; A sealing block is fixedly installed on the inner wall of the outer cylinder, and a through hole is provided inside the sealing block for the telescopic rod to pass through.

5. The bone cement filling device for regional switching material according to claim 4, characterized in that, The switching mechanism includes: A fixed base is fixedly installed at one end of the outer cylinder near the control valve; The lever is rotatably mounted on the fixed base; The slot frame is fixedly connected to the lever; A connecting seat is fixedly connected to the control valve. Connecting columns are provided on both sides of the connecting seat, and sliding grooves adapted to the connecting columns are opened on both sides inside the slot frame. The connecting columns are slidably embedded in the sliding grooves.

6. The bone cement filling device for regional switching material according to claim 4, characterized in that, The adjustment mechanism includes: A mounting base is fixedly disposed on the top of the fixed cover, and a rotating shaft is rotatably disposed inside the mounting base; A rotating wheel is fixedly mounted on the rotating shaft of the mounting base, and the eccentric rubber block is fixedly sleeved on the rotating wheel; A ring is disposed at one end of the rotating shaft; A torsion spring is disposed between the rotating wheel and the mounting base; The speed regulating frame is slidably disposed inside the mounting base and fixedly connected to the telescopic rod. The eccentric rubber block is in contact with the speed regulating frame, and a handle is provided at the end of the speed regulating frame away from the telescopic rod.

7. The bone cement filling device for regional switching material according to claim 4, characterized in that, The supporting structure includes: The crossbar is fixedly connected to the fixed cover; A limiting ring is fixedly installed at the end of the cross frame away from the fixed cover; The mounting ring is rotatably positioned within the limiting ring; Three positioning recesses are evenly spaced on the outer circumferential surface of the mounting ring; The positioning rubber post is inserted through the side wall of the limiting ring and embedded in the corresponding positioning recess.

8. The bone cement filling device for regional switching material according to claim 7, characterized in that, Each of the filling mechanisms includes: A storage cylinder is disposed within the mounting ring; The second piston is slidably disposed on the inner wall of the storage cylinder; An extrusion member is fixedly disposed at one end of the second piston near the gas spring, and the extrusion member is adapted to the telescopic rod; An injection tube is assembled at the output end of the storage cylinder.

9. The bone cement filling device for regional switching material according to claim 3, characterized in that, A sealing ring is installed between the outer cylinder and the inner cylinder on the fixing block.

10. The bone cement filling device for the zone-switching material according to any one of claims 1 to 9, characterized in that, The storage cylinder is transparent and has dosage scale lines uniformly engraved along the outer wall of the storage cylinder.

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