Bone cement electric screw pushing injection device

Abstract

The invention discloses a bone cement electric screw pushing injection device, and relates to the field of orthopedic surgical instruments, the bone cement electric screw pushing injection device comprises a base, one end of the base is connected with an electric driving unit, a variable-pitch screw penetrates through the middle of the base, and one end of the variable-pitch screw is connected with the electric driving unit; one end of the material cavity is connected with the other end of the base, and the other end of the variable-pitch screw is arranged in the material cavity; the needle head is connected with the other end of the trough; the pitch of the variable-pitch screw is gradually reduced from one end to the other end; according to the injection device, the injection amount of bone cement can be well controlled through the electric driving unit, and the injection device is divided into the material cavity and the needle head, so that cleaning is convenient, and the operation cost can be effectively reduced.

Description

Technical Field

[0001] The invention belongs to the field of orthopedic surgical instruments, and more specifically, relates to a bone cement electric screw driving injection device. Background Art

[0002] Bone cement injectors are tools used to inject bone cement during fracture repair or tumor interventional treatment. Existing injection devices rely on manual operation of the injector, and the force is difficult to control. During the curing process of bone cement, the injection force needs to be changed according to the injection force requirements at each stage, but it is difficult for surgical personnel to ensure this operation requirement. In addition, blind injection is difficult to control the amount of bone cement injected, which is easy to cause sequelae. If the injection amount is observed under X-ray scanning, the surgical personnel will be exposed to a large amount of radiation. In addition, existing injectors can only be operated manually, and since it is not convenient to clean the injector after surgery, it will not be reusable, resulting in increased surgical costs. Summary of the invention

[0003] The purpose of the present invention is to address the deficiencies in the prior art and provide a bone cement electric screw-driven injection device, which can well control the injection volume of bone cement through an electric drive unit, and the injection device is divided into a material chamber and a needle, which is convenient for cleaning and can effectively reduce surgical costs.

[0004] In order to achieve the above object, the present invention provides a bone cement electric screw driving injection device, comprising:

[0005] A base, one end of which is connected to the electric drive unit, a variable pitch screw is provided through the middle of the base, and one end of the variable pitch screw is connected to the electric drive unit;

[0006] A material cavity, one end of which is connected to the other end of the base, and the other end of the variable pitch screw is arranged in the material cavity;

[0007] A needle connected to the other end of the trough;

[0008] The pitch of the variable pitch screw decreases from one end to the other end.

[0009] Optionally, a connecting block is provided between the base and the material chamber, the rod portion of the variable pitch screw is penetrated through a mounting hole of the connecting block, and a ceramic bearing is provided in the mounting hole.

[0010] Optionally, the material cavity includes a feed portion, a material pipe and a discharge head, the feed portion and one end of the material pipe are integrally connected, and the other end of the material pipe is threadedly connected to the discharge head.

[0011] Optionally, the feed part includes a feed pipe body and a branch pipe, the feed pipe body is provided with a accommodating cavity inside, the inner cavity of the branch pipe is communicated with the accommodating cavity, and the variable pitch screw passes through the accommodating cavity.

[0012] Optionally, the discharge head and the needle head are detachably connected.

[0013] Optionally, the cavity wall of the accommodating cavity cooperates with the spiral blades of the variable pitch screw.

[0014] Optionally, a plug connector is provided on the outside of the base, a retractable card block is provided on the plug connector, and the base is connected to the robot arm via the plug connector.

[0015] Optionally, the electric drive unit is an adjustable speed rotating motor, and a signal receiver is provided on the adjustable speed rotating motor.

[0016] Optionally, the output end of the adjustable speed rotating motor is connected to the variable pitch screw via a plum blossom coupling.

[0017] Optionally, the needle is a stainless steel needle.

[0018] The present invention provides a bone cement electric screw driving injection device, which has the beneficial effects of: in the injection device, a variable pitch screw is controlled by an adjustable speed rotating motor to achieve adjustment of the bone cement injection force, and a signal receiver is connected to the adjustable speed rotating motor, so that surgical personnel can remotely control and avoid receiving a large amount of radiation, and a material tube in the material chamber and a discharge head are connected by a screw connection, so that the injection device can be disassembled and cleaned, which is convenient for reuse of the injection device.

[0019] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, wherein like reference numerals generally represent like components throughout the exemplary embodiments of the present invention.

[0021] Figure 1 A schematic structural diagram of a bone cement electric screw driving injection device according to an embodiment of the present invention is shown.

[0022] Figure 2 A schematic structural diagram of a bone cement electric screw driving injection device according to an embodiment of the present invention is shown with the base and the feeding part removed.

[0023] Figure 3A schematic structural diagram of a variable pitch screw according to an embodiment of the present invention is shown.

[0024] Description of reference numerals:

[0025] 1. Base; 101. Plug connector; 2. Adjustable speed motor; 3. Variable pitch screw; 301. Rod; 302. Spiral blade; 4. Needle; 5. Connecting block; 6. Feeding part; 7. Feeding pipe; 8. Discharging head; 9. Internal threaded pipe; 10. Branch pipe; 11. Plum blossom coupling. DETAILED DESCRIPTION

[0026] The preferred embodiments of the present invention will be described in more detail below. Although the preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0027] The present invention provides a bone cement electric screw driving injection device, comprising:

[0028] A base, one end of which is connected to the electric drive unit, a variable pitch screw is provided through the middle of the base, and one end of the variable pitch screw is connected to the electric drive unit;

[0029] A material cavity, one end of which is connected to the other end of the base, and the other end of the variable pitch screw is arranged in the material cavity;

[0030] A needle, connected to the other end of the trough;

[0031] The pitch on a variable pitch screw decreases from one end to the other.

[0032] Specifically, the injection device is connected to the mechanical arm through the base, and the surgical position of the injection device can be adjusted by the mechanical arm to facilitate the surgical operation; the base is connected to the material chamber through the driving mechanism, and the rotating variable pitch screw can deliver bone cement to the needle end to achieve the injection of bone cement. The variable pitch screw is only provided with spiral blades in the part inside the material chamber, and the pitch is larger at the end close to the bone cement inlet, and the pitch is smaller at the end close to the bone cement outlet, and the spacing of the entire spiral blades is getting smaller and smaller; when the bone cement just enters the material chamber, due to the larger pitch, the flow speed of the same mass of bone cement slows down, so that the bone cement can be fully mixed, and the residual air in the material chamber can be emptied. In the process of bone cement flowing to the needle, due to the gradual reduction of the pitch, the flow speed of the same mass of bone cement begins to increase, and finally injected into the patient's affected area through the needle.

[0033] Optionally, a connecting block is provided between the base and the material cavity, the rod portion of the variable pitch screw is penetrated through a mounting hole of the connecting block, and a ceramic bearing is provided in the mounting hole.

[0034] Specifically, bolt holes are respectively provided on the outer circumference of the base, the connecting block and the material cavity, and the three are connected through bolts, and the variable pitch screw is connected to the central connecting block. This ensures that under the drive of the electric drive unit, the variable pitch screw can stably rotate in the material cavity to deliver bone cement to the needle.

[0035] Optionally, the material cavity includes a feed portion, a feed pipe and a discharge head, the feed portion and one end of the feed pipe are integrally connected, and the other end of the feed pipe is threadedly connected to the discharge head.

[0036] Specifically, the material cavity introduces bone cement into the material tube through the feed part, and under the transportation of the variable pitch screw, the bone cement enters the needle through the discharge head and is finally injected into the patient's affected area; when the injection device is used for postoperative disinfection, the discharge head can be separated from the material tube, so that the bone cement in the material cavity can be thoroughly cleaned for easy reuse.

[0037] Optionally, the feeding part includes a feeding pipe body and a branch pipe, the feeding pipe body is provided with an accommodating cavity inside, the inner cavity of the branch pipe is communicated with the accommodating cavity, and the variable pitch screw runs through the accommodating cavity.

[0038] Specifically, a accommodating chamber and a branch tube cavity are provided in the feed part, and bone cement is injected into the cavity through the branch tube cavity. When the bone cement enters the accommodating chamber, the bone cement is contacted by the spiral blades of the variable pitch screw, and is discharged into the material tube under the thrust of the spiral blades. The variable pitch screw includes a central rod portion and peripheral spiral blades, and the spiral blades are arranged on the periphery of a section of the rod portion located in the material cavity. The rod portion passes through the feed tube body. In order to prevent the bone cement entering the accommodating chamber from flowing toward the electric drive unit, a ceramic bearing is installed between the rod portion and the accommodating chamber, and the outer wall of the ceramic bearing is sealed to the hole wall of the accommodating hole, and the inner wall of the ceramic bearing is sealed to the outer surface of the rod portion, so as to ensure that the bone cement flows toward the needle tip under the action of the spiral blades.

[0039] Optionally, the discharge head and the needle are detachably connected.

[0040] Specifically, in the injection device, the discharging head and the needle are detachably connected, which makes it convenient for doctors to install needles of different thicknesses.

[0041] Optionally, the cavity wall of the accommodating cavity cooperates with the spiral blades of the variable pitch screw.

[0042] Specifically, the inner diameters of the accommodating cavity and the inner cavity of the branch tube are the same, and the outer sides of the spiral blades of the variable pitch screw slide in contact with the walls of the accommodating cavity and the inner cavity, so that bone cement will not flow from between the spiral blades and the cavity wall into the adjacent cavity when being transported by the spiral blades.

[0043] Optionally, a plug connector is provided on the outside of the base, a retractable card block is provided on the plug connector, and the base is connected to the robot arm through the plug connector.

[0044] Specifically, the injection device cooperates with the universal interface of the robotic arm through the plug connector on the base. When the injection device needs to be connected to the surgical robot, it is only necessary to plug and fix the base and the robotic arm, which facilitates the automatic injection operation of bone cement.

[0045] Optionally, the electric drive unit is an adjustable speed rotating motor, and a signal receiver is provided on the adjustable speed rotating motor.

[0046] Specifically, the rotation speed of the variable pitch screw can be changed by rotating the motor with an adjustable speed, so that the injection force of the bone cement can be changed to meet the requirements of injection force changes at various stages during the operation; in addition, a signal receiver is connected to the motor to perform remote injection operations, which makes it convenient for surgeons to hide behind lead plates and reduce body radiation.

[0047] Optionally, the output end of the adjustable speed rotating motor is connected to the variable pitch screw through a plum blossom coupling.

[0048] Specifically, the output end of the motor is connected to the screw rod by using a plum blossom coupling, which can ensure the connection strength between the two, can efficiently transmit torque, and is relatively easy to install.

[0049] Optionally, the needle is a stainless steel needle.

[0050] Specifically, the use of a stainless steel needle can facilitate postoperative cleaning, so that the injection device can be reused, thereby reducing surgical costs.

[0051] Example

[0052] like Figures 1 to 3 As shown, the present invention provides a bone cement electric screw driving injection device, comprising:

[0053] A base 1, one end of which is connected to a speed-adjustable rotating motor 2, a variable pitch screw 3 is provided through the middle of the base 1, and one end of the variable pitch screw 3 is drivingly connected to the speed-adjustable rotating motor 2;

[0054] A material cavity, one end of which is connected to the other end of the base 1, and the other end of the variable pitch screw 3 is arranged in the material cavity;

[0055] The needle 4 is connected to the other end of the trough;

[0056] The pitch of the variable pitch screw 3 decreases from the upper end to the lower end.

[0057] In this embodiment, a connecting block 5 is provided between the base 1 and the material chamber, and the rod portion 301 of the variable pitch screw 3 is penetrated in the mounting hole of the connecting block 5, and a ceramic bearing is provided in the mounting hole.

[0058] In this embodiment, the material chamber includes a feed portion 6 , a feed pipe 7 and a discharge head 8 . The feed portion 6 and one end of the feed pipe 7 are integrally connected, and the other end of the feed pipe 7 is connected to the discharge head 8 via an internal threaded tube 9 .

[0059] In this embodiment, the other end of the material pipe 7 is provided with an external thread, the end of the discharge head 8 is provided with a flange, and the end of the internal threaded tube 9 is provided with a clamping portion corresponding to the flange. While the internal threaded tube 9 is threadedly connected to the external thread on the material pipe 7, the discharge head 8 is pressed onto the end face of the other end of the material pipe 7 through the fit and fixation of the clamping portion and the flange.

[0060] In this embodiment, the feed part 6 includes a feed pipe body and a branch pipe 10. The feed pipe body is provided with a receiving cavity inside. The inner cavity of the branch pipe 10 is connected with the receiving cavity. The variable pitch screw 3 passes through the receiving cavity.

[0061] In this embodiment, the discharge head 8 and the needle head 4 are detachably connected.

[0062] In this embodiment, the cavity wall of the accommodating cavity cooperates with the spiral blade 302 of the variable pitch screw 3 .

[0063] In this embodiment, a plug connector 101 is disposed on the outside of the base 1 , a retractable clamping block is disposed on the plug connector 101 , and the base 1 is connected to the robot arm via the plug connector 101 .

[0064] In this embodiment, a signal receiver is provided on the adjustable speed rotating motor 2 .

[0065] In this embodiment, the output end of the adjustable speed rotating motor 2 is connected to the variable pitch screw 3 via a plum blossom coupling 11 .

[0066] In this embodiment, the needle 4 is a stainless steel needle.

[0067] In summary, during use of the bone cement electric screw push injection device, the base 1 is moved to a specified position by a mechanical arm, and the bone cement is injected into the feed part 6 through the branch pipe 10. Driven by the adjustable speed rotating motor 2, the spiral blades 302 on the variable pitch screw 3 transport the bone cement toward the needle 4. Since the spacing of the spiral blades 302 at the upper end of the variable pitch screw 3 is larger, the flow speed of the bone cement is slowed down, so that the bone cement can fully react and the remaining air in the material cavity can be completely discharged; when the bone cement flows to the lower end of the variable pitch screw 3, the spacing of the spiral blades 302 gradually decreases, and the flow speed of the bone cement is accelerated, so that the bone cement flowing from the needle 4 to the patient's affected part quickly diffuses into the bone gap.

[0068] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A bone cement electric screw driving injection device, characterized in that: include: A base, one end of which is connected to the electric drive unit, a variable pitch screw is provided through the middle of the base, and one end of the variable pitch screw is connected to the electric drive unit; A material cavity, one end of which is connected to the other end of the base, and the other end of the variable pitch screw is arranged in the material cavity; A needle connected to the other end of the trough; The pitch of the variable pitch screw decreases from one end to the other end.

2. The bone cement electric screw driving injection device according to claim 1, characterized in that: A connecting block is arranged between the base and the material cavity, the rod portion of the variable pitch screw is penetrated and arranged in a mounting hole of the connecting block, and a ceramic bearing is arranged in the mounting hole.

3. The bone cement electric screw driving injection device according to claim 1, characterized in that: The material cavity comprises a feed portion, a material pipe and a discharge head. The feed portion and one end of the material pipe are integrally connected, and the other end of the material pipe is threadedly connected to the discharge head.

4. The bone cement electric screw driving injection device according to claim 3, characterized in that: The feeding part comprises a feeding pipe body and a branch pipe. The feeding pipe body is provided with a containing cavity inside. The inner cavity of the branch pipe is communicated with the containing cavity. The variable pitch screw runs through the containing cavity.

5. The bone cement electric screw driving injection device according to claim 3, characterized in that: The discharge head and the needle head are detachably connected.

6. The bone cement electric screw driving injection device according to claim 4, characterized in that: The cavity wall of the accommodating cavity matches with the spiral blades of the variable pitch screw.

7. The bone cement electric screw driving injection device according to claim 1, characterized in that: A plug connector is arranged outside the base, a retractable card block is arranged on the plug connector, and the base is connected to the mechanical arm through the plug connector.

8. The bone cement electric screw driving injection device according to claim 1, characterized in that: The electric drive unit is a speed-adjustable rotating motor, and a signal receiver is arranged on the speed-adjustable rotating motor.

9. The bone cement electric screw driving injection device according to claim 8, characterized in that: The output end of the adjustable speed rotating motor is connected to the variable pitch screw through a plum blossom coupling.

10. The bone cement electric screw driving injection device according to claim 1, characterized in that: The needle is a stainless steel needle.

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