Bone cement pusher

Abstract

The utility model discloses a bone cement pusher which comprises a pusher body and a bone cement injector. Limiting sliding rods are fixedly installed at the four corners of the inner side of the pusher body, a driving motor is fixedly installed on the rear side of the upper end of the pusher body in a supporting mode, a transmission lead screw is fixedly installed on a transmission shaft part at the lower end of the driving motor, and the outer curved surfaces of the upper end and the lower end of the transmission lead screw are in threaded connection with moving blocks correspondingly. The two side ends of the moving block are rotationally connected with a front swing arm and a rear swing arm through pin shafts correspondingly, the front swing arm is rotationally connected with a first pushing block through a pin shaft, the front end of the first pushing block is movably connected with a second pushing block in an attached mode, and supporting springs are fixedly installed at the four corners of the front end of the second pushing block; a pushing groove is formed in the middle of the front end face of the second pushing block. The push rod part at the rear tail end of the bone cement injector can be uniformly pushed to push and inject forwards by controlling and starting the driving motor.

Description

Technical Field

[0001] The utility model relates to the technical field of bone cement, in particular to a bone cement pusher. Background Art

[0002] Bone cement is a commonly used material in medicine, especially in orthopedic surgery. Its physical properties and appearance after solidification are similar to those of white cement used in construction and decoration, hence the name. The chemical name of bone cement is acrylic cement or polymethyl methacrylate.

[0003] The main functions of bone cement include support and fixation. In orthopedic surgery, bone cement can be filled into bone defects or between bones and prostheses to provide temporary support and fixation. For example, in artificial joint replacement surgery, bone cement can firmly bond the prosthesis to the bone and increase the stability of the prosthesis. In vertebroplasty surgery, bone cement can be injected to stabilize the vertebrae and quickly relieve pain. In addition, bone cement can also be used to fill osteomyelitis and bone defects. On the one hand, it can fill the cavity, and on the other hand, it can continuously release antibiotics to play an anti-inflammatory role.

[0004] Among them, application number 202023311114.8 discloses "a new type of bone cement pusher for orthopedics", including a push handle and a main pipe, a push rod is fixedly connected to the middle end of the right side of the push handle, a moving block is fixedly connected to the right side of the push rod, a rubber plug is fixedly connected to the right side of the moving block, the upper and lower ends of the rubber plug are in contact with the inner wall of the main pipe, the left sides of the upper and lower ends of the main pipe are fixedly connected with fixing rings, the lower end of the outer surface of the main pipe is provided with an outer sheath, and the middle end of the right side of the main pipe is fixedly connected to a discharge pipe.

[0005] However, when the above-mentioned device is in use, during the bone cement pushing process, manual pushing is performed through a push rod. However, when using the push rod for manual pushing, it is difficult to manually control the pushing force and uniformity of the bone cement, resulting in insufficient operating accuracy, resulting in uneven bone cement pushing, thereby affecting the patient's treatment effect and recovery. Utility Model Content

[0006] The purpose of the utility model is to provide a bone cement pusher to solve the problem proposed in the above background technology that in the process of pushing bone cement, manual pushing is performed by a push rod, but when using the push rod for manual pushing, it is difficult to manually control the pushing force and uniformity of the bone cement, resulting in insufficient operating accuracy, resulting in uneven bone cement pushing, thereby affecting the patient's treatment effect and recovery problem.

[0007] In order to achieve the above-mentioned purpose, the utility model provides the following technical solution: comprising a pusher body and a bone cement injector;

[0008] The rear end of the driving mechanism is fixedly provided with a limit slide bar at the four corners of the inner side of the driving mechanism body, and a driving motor is fixedly installed on the rear support of the upper end of the driving mechanism body, and a transmission screw is fixedly installed on the transmission shaft part of the driving motor, and the outer curved surfaces of the upper and lower ends of the transmission screw are respectively threadedly connected to a moving block, and the two side ends of the moving block are respectively rotatably connected to a front swing arm and a rear swing arm by a pin shaft, and the front swing arm is rotatably connected to a first pushing block by a pin shaft, and the front end of the first pushing block is movably connected to a second pushing block in affixed manner, and the front end four corners of the second pushing block are fixedly provided with supporting springs, and a pushing groove is opened in the middle of the front end surface of the second pushing block; the lower end support of the driving mechanism body is fixedly provided with a supporting groove, and a mobile control power supply for providing working power to the driving motor is fixedly installed inside the supporting groove;

[0009] The bone cement syringe is penetrated and movably connected to the middle part of the front end of the pusher body. The outer curved surface at the rear end of the bone cement syringe is threadedly connected with a fastening ring for fastening and locking the bone cement syringe. The push rod part at the rear end of the bone cement syringe is movably connected to the inner wall of the pushing groove.

[0010] Preferably, there are four limit sliding rods, which are symmetrically distributed at the four corners of the inner side of the pusher body.

[0011] Preferably, the outer curved threads of the upper and lower ends of the transmission screw rod are oriented in opposite directions, and the middle portion of the transmission screw rod is rotatably connected to the inner side of the rear end of the pusher body through the support of a bearing seat.

[0012] Preferably, there are two moving blocks, which are symmetrically distributed at the upper and lower ends of the transmission screw, and the rear top end of the rear swing arm is rotatably connected to the rear end of the pusher body through a pin shaft.

[0013] Preferably, the four corners of the first pushing block pass through and fit flexibly connected to the outer curved surface at the rear end of the limiting slide rod, the four corners of the second pushing block pass through and fit flexibly connected to the outer curved surface at the middle end of the limiting slide rod, and the front top end of the support spring is fixedly installed on the inner side of the front end of the pusher body.

[0014] Preferably, a supporting handle is fixedly installed at the lower end of the supporting groove, and a display control panel for controlling the driving motor is fixedly installed at the rear end of the pusher body.

[0015] Preferably, an outer side of the rear end of the bone cement syringe is provided with an external thread, and there are two fastening rings, which are symmetrically distributed at the rear end of the bone cement syringe.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] When the driving motor is turned on, the utility model will drive the moving block to move synchronously inward or outward due to the force generated by the threaded connection with the outer curved surfaces of the upper and lower ends of the transmission screw rod. When the moving block moves synchronously inward, it will drive the inner sides of the front swing arm and the rear swing arm to swing toward the middle of the transmission screw rod. When the inner sides of the front swing arm and the rear swing arm swing toward the middle of the transmission screw rod, they will push the first push block to move forward in a straight line along the outer curved surface at the rear end of the limiting slide rod. When the first push block moves forward in a straight line, it will push the second push block to move forward in a straight line along the outer curved surface at the middle end of the limiting slide rod. When the second push block moves forward in a straight line, it will push the push rod part at the rear end of the bone cement syringe forward for injection through the pushing groove, thereby realizing that the push rod part at the rear end of the bone cement syringe can be evenly pushed forward for injection by controlling to turn on the driving motor, thereby avoiding the situation where the bone cement is pushed unevenly due to manual pushing of the push rod.

[0018] The utility model also can replace the bone cement syringe by rotating and loosening the fastening ring when it is needed. When the fastening ring is loosened, the bone cement syringe can be taken out from the middle of the front end of the pusher body to replace the bone cement syringe, thereby achieving uniform pushing of the bone cement and facilitating the replacement of the bone cement syringe. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The overall structure of the bone cement pusher of the utility model is shown in FIG. Figure 1 ;

[0020] Figure 2 The overall structure of the bone cement pusher of the utility model is shown in FIG. Figure 2 ;

[0021] Figure 3 The overall structure of the bone cement pusher of the utility model is shown in FIG. Figure 3 ;

[0022] Figure 4 The utility model is a schematic cross-sectional view of the overall structure of the bone cement pusher.

[0023] In the figure: 1. Pusher body; 2. Bone cement syringe; 3. Limiting slide bar; 4. Driving motor; 5. Transmission screw; 6. Moving block; 7. Front swing arm; 8. Rear swing arm; 9. First push block; 10. Second push block; 11. Support spring; 12. Pushing groove; 13. Supporting groove; 14. Mobile control power supply; 15. Display control panel; 16. Fastening ring. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] See also Figure 1-4 The utility model provides a technical solution of a bone cement pusher: comprising a pusher body 1 and a bone cement syringe 2;

[0026] The four inner corners of the pusher body 1 are fixedly installed with limit slide bars 3, and there are four limit slide bars 3, which are symmetrically distributed at the four inner corners of the pusher body 1. A driving motor 4 is fixedly installed on the rear support of the upper end of the pusher body 1, and a transmission screw 5 is fixedly installed on the transmission shaft part of the lower end of the driving motor 4, and the threads of the upper and lower outer curved surfaces of the transmission screw 5 are in opposite directions. The middle part of the transmission screw 5 is rotatably connected to the inner side of the rear end of the pusher body 1 through the bearing seat support, and the upper and lower outer curved surfaces of the transmission screw 5 are respectively threadedly connected with moving blocks 6, and there are two moving blocks 6, which are symmetrically distributed at the upper and lower ends of the transmission screw 5, and the two side ends of the moving block 6 are respectively rotatably connected with the front swing arm 7 and the rear swing arm 8 through the pin shaft, and the rear top end of the rear swing arm 8 is rotatably connected to the rear end of the pusher body 1 through the pin shaft, the front swing arm 7 is rotatably connected with the first push block 9 through the pin shaft, and the first push block 9 The four corners penetrate and fit movably connected to the outer curved surface at the rear end of the limiting slide bar 3, the front end of the first pushing block 9 fits and is movably connected with the second pushing block 10, and the four corners of the second pushing block 10 penetrate and fit movably connected to the outer curved surface at the middle end of the limiting slide bar 3, the four corners of the front end of the second pushing block 10 are fixedly installed with supporting springs 11, and the front top end of the supporting spring 11 is fixedly installed on the inner side of the front end of the pusher body 1, so that the second pushing block 10 is elastically supported by the supporting spring 11, and a pushing groove 12 is provided in the middle part of the front end surface of the second pushing block 10, and a supporting groove 13 is fixedly installed at the lower end of the pusher body 1, and a mobile control power supply 14 for providing working power to the drive motor 4 is fixedly installed inside the supporting groove 13, and a supporting handle is fixedly installed at the lower end of the supporting groove 13, and a display control panel 15 for controlling the drive motor 4 is fixedly installed at the rear end of the pusher body 1;

[0027] The bone cement syringe 2 passes through and is flexibly connected to the middle part of the front end of the pusher body 1. An external thread is provided on the outer side of the rear end of the bone cement syringe 2. The outer curved surface of the rear end of the bone cement syringe 2 is threadedly connected to a fastening ring 16 for fastening and locking the bone cement syringe 2. There are two fastening rings 16, which are symmetrically distributed at the rear end of the bone cement syringe 2. The push rod part at the rear end of the bone cement syringe 2 is flexibly connected to the inner wall of the pushing groove 12.

[0028] Working principle: When in use, the utility model controls the start-up of the driving motor 4 through the display control panel 15. When the driving motor 4 is turned on, it will drive the transmission screw 5 to rotate. When the transmission screw 5 rotates, it will drive the moving block 6 to move synchronously inward or outward due to the force generated by the threaded connection with the outer curved surfaces of the upper and lower ends of the transmission screw 5. When the moving block 6 moves synchronously inward, it will drive the inner sides of the front swing arm 7 and the rear swing arm 8 to swing toward the middle of the transmission screw 5. When the inner sides of the front swing arm 7 and the rear swing arm 8 swing toward the middle of the transmission screw 5, it will push the first pushing block 9 to move forward in a straight line along the outer curved surface at the rear end of the limiting slide bar 3. When the first pushing block 9 moves forward in a straight line, it will push the second pushing block 10 to move forward in a straight line along the outer curved surface at the middle end of the limiting slide bar 3. When the second pushing block 10 moves forward in a straight line, it will push the bone cement through the pushing groove 12. The push rod part at the rear end of the syringe 2 is pushed forward for injection. At the same time, when the second push block 10 moves forward linearly, it will push the compression support spring 11, so that when the moving block 6 moves outward synchronously, it will drive the inner sides of the front swing arm 7 and the rear swing arm 8 to swing toward the outer side of the transmission screw 5. When the inner sides of the front swing arm 7 and the rear swing arm 8 swing toward the outer side of the transmission screw 5, it will drive the first push block 9 to move backward linearly. When the first push block 9 moves backward linearly, the second push block 10 will move backward linearly under the action of the elastic potential energy generated by the compression deformation of the support spring 11, so that the second push block 10 is always in contact with the front end of the first push block 9, so that the push rod part at the rear end of the bone cement syringe 2 can be evenly pushed forward for injection by controlling the start of the drive motor 4, avoiding the situation where the bone cement is pushed unevenly due to manual pushing of the push rod;

[0029] At the same time, when the bone cement syringe 2 needs to be replaced, the fastening ring 16 is loosened by rotating. When the fastening ring 16 is loosened, the bone cement syringe 2 can be replaced by taking it out from the middle of the front end of the pusher body 1, thereby achieving uniform pushing of the bone cement and facilitating the replacement of the bone cement syringe 2.

[0030] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. Bone cement pusher, characterized in that: It comprises a pusher body (1) and a bone cement syringe (2); The pusher body (1) is fixedly provided with limit slide bars (3) at the four inner corners, the upper rear support of the pusher body (1) is fixedly provided with a drive motor (4), the lower transmission shaft of the drive motor (4) is fixedly provided with a drive screw (5), the upper and lower outer curved surfaces of the drive screw (5) are respectively threadedly connected with moving blocks (6), the two side ends of the moving block (6) are respectively rotatably connected with a front swing arm (7) and a rear swing arm (8) through a pin shaft, the front swing arm (7) is rotatably connected with a first push block (9) through a pin shaft, the front end of the first push block (9) is movably connected with a second push block (10), the front end of the second push block (10) is fixedly provided with support springs (11) at the four front corners, the front end of the second push block (10) is provided with a pushing groove (12) in the middle of the front end surface, the lower support of the pusher body (1) is fixedly provided with a supporting groove (13), and a mobile control power supply (14) for providing working power to the drive motor (4) is fixedly provided inside the supporting groove (13); The bone cement syringe (2) penetrates and fits movably connected to the middle part of the front end of the pusher body (1); the outer curved surface at the rear end of the bone cement syringe (2) is threadedly connected to a fastening ring (16) for fastening and locking the bone cement syringe (2); and the push rod portion at the rear end of the bone cement syringe (2) is fit movably connected to the inner wall of the push groove (12).

2. The bone cement pusher according to claim 1, characterized in that: There are four limit sliding rods (3), which are symmetrically distributed at the four inner corners of the pusher body (1).

3. The bone cement pusher according to claim 2, characterized in that: The outer curved threads of the upper and lower ends of the transmission screw rod (5) are oriented in opposite directions, and the middle portion of the transmission screw rod (5) is rotatably connected to the inner side of the rear end of the pusher body (1) via a bearing seat support.

4. The bone cement pusher according to claim 3, characterized in that: There are two moving blocks (6), which are symmetrically distributed at the upper and lower ends of the transmission screw rod (5), and the rear top end of the rear swing arm (8) is rotatably connected to the rear end of the pusher body (1) through a pin shaft.

5. The bone cement pusher according to claim 4, characterized in that: The four corners of the first pushing block (9) penetrate through and fit movably connected to the outer curved surface at the rear end of the limiting slide bar (3); the four corners of the second pushing block (10) penetrate through and fit movably connected to the outer curved surface at the middle end of the limiting slide bar (3); the front top end of the support spring (11) is fixedly installed on the inner side of the front end of the pusher body (1).

6. The bone cement pusher according to claim 5, characterized in that: A supporting handle is fixedly mounted on the lower end of the supporting groove (13), and a display control panel (15) for controlling the driving motor (4) is fixedly mounted on the rear end of the pusher body (1).

7. The bone cement pusher according to claim 6, characterized in that: An external thread is provided on the outer side of the rear end of the bone cement syringe (2), and there are two fastening rings (16), which are symmetrically distributed at the rear end of the bone cement syringe (2).

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