A bone cement automatic stirring injection device

Abstract

The present invention discloses an automatic bone cement stirring and injection device, comprising a cylindrical structure, a sliding block, an agitator, a piston, an agitator driving device and a piston driving device; the two ends of the cylindrical structure are respectively an open mounting port and a contracted injection port, and a feed port is provided on the side wall; one end of the agitator passes through the mounting port of the cylindrical structure and is placed inside the cylindrical structure, and the other end is connected to the rotating shaft of the agitator driving device; one end of the piston passes through the mounting port of the cylindrical structure and is placed inside the cylindrical structure, and the other end is against the sliding block; the sliding block is connected to the piston driving device and driven by the piston driving device to perform linear motion. The present invention realizes the integrated operation of stirring and injecting bone cement through a uniquely designed piston and agitator combination; the high degree of automation, the use of electrical drive stirring and injection process, shortens the overall operation time, reduces the physical burden of the operator, and reduces the exposure of the operator and / or the patient to radiation.

Description

Technical Field

[0001] The invention relates to the field of medical surgical operations, in particular to an automatic bone cement stirring and injection device. Background Art

[0002] Bone cement, a medical material widely used in orthopedic surgery, is named for its unique physical properties and its appearance and shape after solidification, which is similar to white cement used in construction. As a common implant in the body, bone cement has a wide range of applications in the medical field, especially in vertebroplasty, joint replacement and other surgeries. With the continuous improvement of my country's medical level, the use of bone cement has also shown an increasing trend year by year.

[0003] The use of bone cement mainly involves two key processes: stirring and injection. Before the operation, the doctor needs to mix the solid and liquid raw materials and stir them manually for several minutes to ensure the uniform mixing of the bone cement. Then, the doctor transfers the stirred bone cement to the syringe and prepares for injection.

[0004] However, the bone cement mixing devices currently developed by researchers still have some shortcomings. First, most of these devices are manually operated, using tools with stirring blades for stirring, which is time-consuming and laborious. Secondly, these devices usually only have a stirring function and lack an injection function, which requires doctors to change tools for injection after stirring, increasing the complexity of the operation. Finally, since the injection of bone cement requires precise control of the injection volume, doctors often need to move frequently between the operating table and the medical imaging room to control the injection volume by observing the images. This method not only prolongs the operation time, but also brings inconvenience to the operation of medical staff and increases the exposure of operators and / or patients to radiation.

[0005] In order to improve these problems, patents CN202221323452.X and CN201120395926.7 respectively proposed two new bone cement mixing devices. Patent CN202221323452.X shows a micro electric stirrer, which drives the spiral blade to rotate by a motor, transports the raw materials from the bottom of the centrifuge tube to the upper end and stirs them, thereby improving the stirring efficiency. However, the device still has some limitations, such as the inability to adjust the stirring speed, the inability to be directly used for injection operations, and the inability to achieve remote operation.

[0006] On the other hand, patent CN201120395926.7 introduces a convenient bone cement stirring and injection device. The device cleverly combines the stirring frame and the syringe body to achieve the integrated operation of stirring and injection. The bone cement can be stirred by turning the stirring handle, and the injection can be achieved by pressing the handle down. This design simplifies the operation process and improves the efficiency of the operation. However, the device also has some shortcomings, such as the stirring and injection operations are all performed manually, the inability to achieve automated operation, and the lack of remote operation function.

[0007] In summary, although these two new bone cement mixing devices have solved the problems existing in the traditional surgical preparation process to a certain extent, there are still some limitations that need to be further improved and perfected. Summary of the invention

[0008] The purpose of the present invention is to propose an automatic bone cement stirring and injection device, which has the functions of automatically adjusting the stirring speed and integrating stirring and injection, so as to meet a wider range of clinical needs and improve surgical efficiency, and enhance the convenience and efficiency of bone cement surgery.

[0009] In order to achieve the above object, the technical solution of the present invention is:

[0010] A bone cement automatic stirring and injection device comprises a cylindrical structure, a sliding block, an agitator, a piston, an agitator driving device and a piston driving device; the two ends of the cylindrical structure are respectively an open mounting port and a contracted injection port, and a feed port is provided on the side wall; one end of the agitator passes through the mounting port of the cylindrical structure and is placed inside the cylindrical structure, and the other end is connected to the rotating shaft of the agitator driving device; one end of the piston passes through the mounting port of the cylindrical structure and is placed inside the cylindrical structure, and the other end abuts against the sliding block; the sliding block is connected to the piston driving device and is driven thereby to perform linear motion.

[0011] The sliding block is composed of an upper sliding block, a lower sliding block, a bearing and a retaining ring. The upper sliding block and the lower sliding block have grooves that match the outer ring of the bearing. The bearing is placed in the groove, the retaining ring abuts against the bearing, and the other end of the piston abuts against the retaining ring of the sliding block.

[0012] The installation port is equipped with an end cover which cooperates with the agitator and the piston and closes the installation port.

[0013] One end of the stirrer installed inside the cylindrical structure is provided with a plurality of blades, and the blades are arranged along the axial direction of the stirrer, and an installation and movement space for the piston is formed between two adjacent blades and the cylinder wall of the cylindrical structure.

[0014] The blades are provided with through holes to facilitate the mixing of bone cement.

[0015] One end of the piston installed inside the cylindrical structure has a columnar structure that is tightly matched with the adjacent blades and the cylinder wall.

[0016] A nut is fixed on the sliding block, a screw is fixed on the output shaft of the piston drive device, and the nut is mounted on the screw. In this process, the cooperation between the nut and the sliding block ensures that the piston only performs linear motion.

[0017] The working principle of the present invention is as follows:

[0018] Stirring action: When the agitator drive is started, it drives the agitator and the piston on it to rotate, thereby achieving uniform mixing of the bone cement;

[0019] Injection action: The activation of the piston drive device transmits linear motion to the three pistons through a series of mechanical connections, pushing the bone cement along the axis of the agitator for injection.

[0020] The present invention realizes the integrated operation of bone cement stirring and injection through the uniquely designed piston and stirrer combination; the high degree of automation, the use of electrical drive stirring and injection process, shortens the overall operation time, reduces the physical burden of the operator, and reduces the exposure of the operator and or the patient to radiation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the assembly of the actuator of the present invention.

[0022] Figure 2 yes Figure 1 Section view of the AA plane.

[0023] Figure 3 It is an exploded view of the piston and the agitator in the present invention. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0025] like Figure 1and 2 As shown, the bone cement automatic stirring and injection device of the present invention comprises a cylindrical structure 100, a sliding block 200, an agitator 300, a piston 400, an agitator driving device 500 and a piston driving device 600; the two ends of the cylindrical structure are respectively an open installation port 110 and a narrowed injection port 120, and a feed port 130 is provided on its side wall, and the feed port can be completely sealed after the feeding is completed; one end of the agitator passes through the installation port of the cylindrical structure and is placed inside the cylindrical structure, and the other end is connected to the rotating shaft of the agitator driving device, and this connection can be a direct connection or an indirect connection. In this embodiment, it is connected through a coupling 700; the sliding block is connected to the piston driving device and is driven by it to perform linear motion; the sliding block is composed of an upper sliding block 210, a lower sliding block 220, a bearing 230 and a retaining ring 240, the upper sliding block and the lower sliding block have a groove matched with the outer ring of the bearing, the bearing is placed in the groove, and the retaining ring is against the bearing, one end of the piston passes through the installation port of the cylindrical structure and is placed inside the cylindrical structure, and the other end of the piston is against the retaining ring of the sliding block.

[0026] The installation port is equipped with an end cover that cooperates with the agitator and the piston and closes the installation port. The end cover in this embodiment is composed of a left end cover 1101 and a right end cover 1102.

[0027] A plurality of blades 310 are provided at one end of the agitator installed inside the cylindrical structure. In this embodiment, three blades are provided. The blades are arranged along the axial direction of the agitator, and an installation and movement space for the piston is formed between two adjacent blades and the cylinder wall of the cylindrical structure.

[0028] The blade is provided with a through hole 3101 to facilitate the mixing of bone cement.

[0029] One end of the piston installed inside the cylindrical structure has a columnar structure 410 that is tightly matched with the adjacent blades and the cylinder wall.

[0030] The sliding block is fixed with a nut 250, and the nut in this embodiment is fixed below the lower sliding block, and the output shaft of the piston drive device is fixed with a screw rod 610, and the nut is installed on the screw rod. In this process, the cooperation between the nut and the sliding block ensures that the piston only performs linear motion.

[0031] The agitator drive device and the piston drive device in this embodiment both use electric motors, but this choice is not used to limit the scope of protection of the present invention. Any device that can achieve the same technical effect and manual operation are within the scope of protection required by the present invention.

[0032] In another embodiment of the present invention, a remote wireless operating device may be further included, and a control device disposed on the main body of the bone cement automatic stirring and injection device of the present invention receives a signal from the remote wireless operating device and controls the agitator drive device and the piston drive device according to the instruction. For those skilled in the art, the remote wireless operating device and the control device here are both based on existing electrical and automation technologies.

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A bone cement automatic stirring injection device, characterized in that: It includes a cylindrical structure, a sliding block, an agitator, a piston, an agitator driving device and a piston driving device; the two ends of the cylindrical structure are an open installation port and a contracted injection port respectively, and a feed port is provided on the side wall; one end of the agitator passes through the installation port of the cylindrical structure and is placed inside the cylindrical structure, and the other end is connected to the rotating shaft of the agitator driving device; one end of the piston passes through the installation port of the cylindrical structure and is placed inside the cylindrical structure, and the other end abuts against the sliding block; the sliding block is connected to the piston driving device and is driven by it to make linear motion; one end of the agitator installed inside the cylindrical structure is provided with a plurality of blades, and the blades are arranged along the axial direction of the agitator, and the installation and movement space of the piston is formed between two adjacent blades and the cylindrical wall of the cylindrical structure.

2. The bone cement automatic stirring injection device according to claim 1, characterized in that: The sliding block is composed of an upper sliding block, a lower sliding block, a bearing and a retaining ring. The upper sliding block and the lower sliding block have grooves that match the outer ring of the bearing. The bearing is placed in the groove, the retaining ring abuts against the bearing, and the other end of the piston abuts against the retaining ring of the sliding block.

3. The bone cement automatic stirring injection device according to claim 1, characterized in that: The installation port is equipped with an end cover which cooperates with the agitator and the piston and closes the installation port.

4. The bone cement automatic stirring injection device according to claim 1, characterized in that: The blades are provided with through holes to facilitate the mixing of bone cement.

5. The bone cement automatic stirring injection device according to claim 1, characterized in that: One end of the piston installed inside the cylindrical structure has a columnar structure that is tightly matched with the adjacent blades and the cylinder wall.

6. The bone cement automatic stirring injection device according to claim 1, characterized in that: A nut is fixed on the sliding block, a screw rod is fixed on the output shaft of the piston driving device, and the nut is installed on the screw rod.

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