CN107224322B - bone cement injector - Google Patents
bone cement injector Download PDFInfo
- Publication number
- CN107224322B CN107224322B CN201710414135.6A CN201710414135A CN107224322B CN 107224322 B CN107224322 B CN 107224322B CN 201710414135 A CN201710414135 A CN 201710414135A CN 107224322 B CN107224322 B CN 107224322B
- Authority
- CN
- China
- Prior art keywords
- movable block
- push rod
- sleeve
- side wall
- bone cement
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000002639 bone cement Substances 0.000 title claims abstract description 57
- 238000002347 injection Methods 0.000 claims abstract description 48
- 239000007924 injection Substances 0.000 claims abstract description 48
- 238000003780 insertion Methods 0.000 claims description 47
- 230000037431 insertion Effects 0.000 claims description 47
- 230000000670 limiting effect Effects 0.000 claims description 36
- 230000007246 mechanism Effects 0.000 claims description 7
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000004378 air conditioning Methods 0.000 claims 1
- 230000033001 locomotion Effects 0.000 abstract description 7
- 238000000034 method Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 3
- 206010066902 Surgical failure Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/88—Osteosynthesis instruments; Methods or means for implanting or extracting internal or external fixation devices
- A61B17/8802—Equipment for handling bone cement or other fluid fillers
- A61B17/8805—Equipment for handling bone cement or other fluid fillers for introducing fluid filler into bone or extracting it
- A61B17/8825—Equipment for handling bone cement or other fluid fillers for introducing fluid filler into bone or extracting it characterised by syringe details
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
- A61B17/7061—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant for stabilising vertebrae or discs by improving the condition of their tissues, e.g. using implanted medication or fluid exchange
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
- A61B17/7094—Solid vertebral fillers; devices for inserting such fillers
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/88—Osteosynthesis instruments; Methods or means for implanting or extracting internal or external fixation devices
- A61B17/8802—Equipment for handling bone cement or other fluid fillers
- A61B17/8805—Equipment for handling bone cement or other fluid fillers for introducing fluid filler into bone or extracting it
- A61B17/8822—Equipment for handling bone cement or other fluid fillers for introducing fluid filler into bone or extracting it characterised by means facilitating expulsion of fluid from the introducer, e.g. a screw pump plunger, hydraulic force transmissions, application of vibrations or a vacuum
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B2017/564—Methods for bone or joint treatment
Abstract
The invention relates to a bone cement injector, which comprises a syringe, a syringe piston, a push rod, a supporting component, a movable block and a moving piece. The outer side wall of the push rod is provided with a first thread section, and one end of the push rod is connected with the injection piston. The support assembly is disposed on the syringe. The movable block is slidably arranged on the supporting component and is provided with a first contact surface for contacting the outer side wall of the push rod. The first contact surface is provided with a second thread section which is matched with the thread of the first thread section. The moving piece is used for driving the movable block to slide on the supporting component so that the first contact surface is contacted with the outer side wall of the push rod. The movable piece drives the movable block to enable the first contact surface to be in contact with the outer side wall of the push rod, so that the second thread section on the movable block can limit the linear drawing movement of the push rod, the push rod can be continuously pushed into the injection cylinder by rotating the push rod, the injection failure phenomenon under the working condition of large injection pressure can be avoided, and bone cement can be smoothly injected into a human body.
Description
Technical Field
The present invention relates to an injector, and more particularly to a bone cement injector.
Background
In vertebroplasty, bone cement is poured into the vertebral body to enable the bone cement to flow into and fill bone gaps and gaps, so that the effect of stabilizing the vertebral body can be achieved. The specific operation method comprises the following steps: firstly pouring bone cement powder into a bowl-shaped stirrer, introducing liquid and stirring to form bone cement, then pouring the bone cement into an injector from the stirrer, installing the injector, and injecting the bone cement into a human body by using the injector. However, when bone cement is injected into a human body, there is often a large injection pressure at the injection end of the injector, so that bone cement cannot be injected into the human body, and there is a risk of surgical failure.
Disclosure of Invention
Based on this, it is necessary to overcome the defects of the prior art, and to provide a bone cement injector which can smoothly inject bone cement into a human body and improve the success rate of bone cement injection surgery.
The technical scheme is as follows: a bone cement injector, comprising: the injection device comprises an injection cylinder, an injection piston and a push rod, wherein the injection piston is arranged in the injection cylinder, a first thread section is arranged on the outer side wall of the push rod, and one end of the push rod is connected with the injection piston; a support assembly disposed on the syringe; the movable block is slidably arranged on the supporting component and is provided with a first contact surface for contacting the outer side wall of the push rod, and a second thread section which is matched with the thread of the first thread section is arranged on the first contact surface; and the moving piece is in transmission connection with the movable block and is used for driving the movable block to slide on the supporting component so as to enable the first contact surface to be in contact with the outer side wall of the push rod.
In the bone cement injector, the first contact surface of the movable block is separated from the outer side wall of the push rod before filling bone cement in the injection cylinder, so that the push rod can be pulled to suck the bone cement into the injection cylinder; in the bone cement injection process, the moving part drives the movable block to slide on the supporting component, so that the first contact surface is contacted with the outer side wall of the push rod, the threads on the first thread section on the first contact surface are matched with the second thread section, so that the second thread section on the movable block can limit the linear drawing movement of the push rod, the push rod can be continuously pushed into the injection cylinder by rotating the push rod, and when the push rod is stopped, the second thread section on the movable block limits the push rod to move, thereby avoiding the phenomenon of injection failure under the working condition of large injection pressure, and smoothly injecting the bone cement into a human body.
In one embodiment, the support assembly comprises a sleeve, a first limiting block and a second limiting block, wherein the sleeve is arranged at the end part of the injection cylinder and sleeved outside the push rod; the first limiting block and the second limiting block are arranged on the inner side wall of the sleeve at intervals, and the movable block is slidably arranged between the first limiting block and the second limiting block. Therefore, the first limiting block and the second limiting block are abutted against the two end faces of the movable block, so that the movable block is prevented from moving in the axial direction of the injection cylinder.
In one embodiment, the side wall of the sleeve is provided with a first inserting port, the moving piece is arranged in the sleeve through the first inserting port and can move along the axial direction of the injection cylinder, and the end part of the moving piece is in contact fit with the end part of the movable block; the second contact surface of the end part of the moving piece, which is contacted with the movable block, is a guide inclined surface, and/or the third contact surface of the end part of the movable block, which is contacted with the moving piece, is a guide inclined surface. In the initial state, the end part of the moving piece is in contact fit with the end part of the movable block, at the moment, the first contact surface of the movable block is separated from the outer side wall of the push rod, the movable block cannot lock the push rod, and the push rod can perform drawing movement; in the injection process, the moving part can be pushed in along the axial direction of the injection cylinder, under the guiding effect of the guiding inclined plane, the moving part pushes the movable block to enable the first contact surface to be in contact with the outer side wall of the push rod, the movable block can play a role of locking the push rod, and after the moving part is pushed in, the side wall of the moving part is abutted against the side wall of the movable block, so that the first contact surface is tightly in contact with the outer side wall of the push rod.
In one embodiment, the side wall of the sleeve is provided with a second insertion opening, the moving piece is installed in the sleeve through the second insertion opening, and the moving direction of the moving piece is matched with the sliding direction of the movable block. Thus, the movable block slides and contacts the outer side wall of the push rod by pushing the movable piece.
In one embodiment, the bone cement injector further comprises a limiting member, the limiting member is provided with an insertion end, a third insertion opening is formed in the side wall of the sleeve, the limiting member is installed in the sleeve through the third insertion opening and can move along the axial direction of the injection cylinder, a first insertion hole capable of being inserted into the insertion end is formed in the end face, facing the limiting member, of the movable block, and when the first contact surface of the movable block contacts the outer side wall of the push rod, the first insertion hole corresponds to the insertion end in position. Therefore, after the movable block slides and contacts the outer side wall of the push rod by pushing the movable piece, the first insertion hole corresponds to the insertion end, and the insertion end of the limiting piece is inserted into the first insertion hole, so that the movable block can be limited. In addition, the movable block is provided with a second jack which can be inserted into the insertion end facing the end face of the limiting piece, and when the first contact surface of the movable block is separated from the outer side wall of the push rod, the insertion end of the limiting piece can be inserted into the second jack so as to limit the movable block.
In one embodiment, the bone cement injector further comprises an elastic return member disposed in the sleeve, wherein one end of the elastic return member is connected to the inner side wall of the sleeve, and one end of the elastic return member is connected to a side of the movable block away from the movable member. Therefore, after the bone cement injection process is finished, the elastic restoring piece pushes the movable block, so that the first contact surface of the movable block is separated from the outer side wall of the push rod, and the reset operation of the movable block is conveniently finished. In this embodiment, the elastic return member is a spring. The movable block is provided with a first through hole, the push rod is arranged in the first through hole, the outer diameter of the push rod is smaller than the diameter of the first through hole, and the first contact surface is arranged on the inner side wall of the first through hole.
In one embodiment, the moving member includes a gear and a rotating shaft; the gear is rotatably arranged inside the sleeve, the gear is connected with the rotating shaft, a second through hole is formed in the side wall of the sleeve, and the rotating shaft extends out of the sleeve through the second through hole; the end face of the movable block is provided with a rack meshed with the gear, and the setting direction of the rack is matched with the sliding direction of the movable block. In an initial state, the first contact surface of the movable block is separated from the outer side wall of the push rod, the movable block cannot lock the push rod, and the push rod can perform drawing movement; in the injection process, the gear can be driven to rotate through the rotating shaft, the movable block is driven to move when the gear rotates, the movable block is pushed to enable the first contact surface to contact the outer side wall of the push rod, and the movable block can play a role in locking the push rod.
In one embodiment, the bone cement injector further comprises a ratchet mechanism, wherein the ratchet mechanism comprises a one-way ratchet wheel and a pawl matched with the one-way ratchet wheel, the one-way ratchet wheel is coaxially arranged with the gear, and the pawl is rotatably arranged on the sleeve. The ratchet mechanism enables the gear to rotate in one direction only, so that when the first contact surface of the movable block is contacted with the outer side wall of the push rod, the gear cannot rotate, and the limit effect on the movable block is achieved, and the first contact surface of the movable block is tightly contacted with the outer side wall of the push rod.
In one embodiment, the moving member includes a cam and a swing lever; the cam is rotatably arranged on the sleeve, is connected with the swinging rod and is contacted with the side wall of the movable block far away from the first limiting block; the side wall of the sleeve is provided with an opening area, and the swing rod extends out of the sleeve through the opening area. Therefore, the swinging rod swings to drive the cam to rotate, and after the cam rotates, the movable block can be pushed to move, so that the first contact surface of the movable block contacts the outer side wall of the push rod. In addition, after the cam swings to push the movable block, the first contact surface of the movable block contacts the outer side wall of the push rod, so that the cam cannot rotate continuously to form a locking state, and the first contact surface is tightly abutted against the outer side wall of the push rod.
In one embodiment, the bone cement injector further comprises a handle, and the other end of the push rod is connected to the handle. The handle at the end part of the push rod can be used for conveniently driving the push rod to rotate, so that bone cement can be injected into a human body.
Drawings
Fig. 1 is a schematic view showing a state of a bone cement injector before injecting bone cement according to one embodiment of the present invention;
FIG. 2 is a schematic view showing a state of the bone cement injector during injection of bone cement according to one embodiment of the present invention;
FIG. 3 is a schematic view showing a bone cement injector according to another embodiment of the present invention;
fig. 4 is a schematic view showing a structure of a bone cement injector according to still another embodiment of the present invention;
fig. 5 is a schematic view showing a bone cement injector according to still another embodiment of the present invention.
10. The injection device comprises an injection cylinder, 20, an injection piston, 30, a push rod, 31, a first thread section, 41, a sleeve, 411, a first insertion opening, 412, a second insertion opening, 413, a third insertion opening, 42, a first limiting block, 43, a second limiting block, 44, an opening area, 50, a movable block, 51, a first contact surface, 52, a third contact surface, 53, a first insertion hole, 54, a first through hole, 55, a rack, 60, a moving member, 61, a second contact surface, 62, a gear, 63, a rotation shaft, 64, a one-way ratchet, 65, a pawl, 66, a cam, 67, a swinging rod, 70, a limiting member, 71, an insertion end, 80, an elastic return member, 90 and a handle.
Detailed Description
In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the invention, whereby the invention is not limited to the specific embodiments disclosed below.
In the description of the present invention, it should be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
It should be noted that in the following embodiments, when one element is considered as being "connected" to another element, it may be directly connected to the other element or may also exist in the middle of the element. In contrast, when an element is referred to as being "directly connected" to another element, there are no intervening elements present.
As shown in fig. 1 to 5, a bone cement injector includes a syringe 10, a syringe piston 20, a push rod 30, a support assembly, a movable block 50, and a moving member 60. The injection piston 20 is arranged inside the injection cartridge 10. The outer side wall of the push rod 30 is provided with a first thread section 31, and one end of the push rod 30 is connected with the injection piston 20. The support assembly is disposed on the syringe 10. The movable block 50 is slidably disposed on the support assembly, and the movable block 50 has a first contact surface 51 for contacting the outer sidewall of the push rod 30. The first contact surface 51 is provided with a second thread segment adapted to the thread of the first thread segment 31. The moving member 60 is in transmission connection with the movable block 50, and the moving member 60 is used for driving the movable block 50 to slide on the supporting component, so that the first contact surface 51 contacts with the outer side wall of the push rod 30.
In the bone cement injector, before filling bone cement in the syringe 10, the first contact surface 51 of the movable block 50 is separated from the outer sidewall of the push rod 30, so that the push rod 30 can be pulled to suck bone cement into the syringe 10; in the bone cement injection process, the moving part 60 drives the movable block 50 to slide on the supporting component, so that the first contact surface 51 is in contact with the outer side wall of the push rod 30, the threads on the first thread section 31 on the first contact surface 51 are matched with the second thread section, so that the second thread section on the movable block 50 can limit the linear drawing movement of the push rod 30, the push rod 30 can be continuously pushed into the injection cylinder 10 by rotating the push rod 30, and when the push rod 30 stops rotating, the second thread section on the movable block 50 limits the push rod 30 to move, thereby avoiding the phenomenon of injection failure under the working condition of large injection pressure, and smoothly injecting the bone cement into a human body.
In this embodiment, the support assembly includes a sleeve 41, a first stopper 42 and a second stopper 43. The sleeve 41 is disposed at an end of the syringe 10 and is sleeved outside the push rod 30, and the first stopper 42 and the second stopper 43 are disposed on an inner side wall of the sleeve 41 at intervals. The movable block 50 is slidably disposed between the first stopper 42 and the second stopper 43. In this way, the first limiting block 42 and the second limiting block 43 are abutted against the two end surfaces of the movable block 50, so that the movable block 50 is prevented from moving in the axial direction of the syringe 10. In other embodiments, the inner side wall of the sleeve 41 may be provided with a guide rail, and the movable block 50 is correspondingly provided with a sliding block in sliding fit with the guide rail; alternatively, the inner side wall of the sleeve 41 may be provided with a guide sleeve, and the movable block 50 is correspondingly provided with a guide rod in sliding fit with the guide sleeve.
In one embodiment, referring to fig. 1 and 2, the side wall of the sleeve 41 is provided with a first insertion opening 411. The moving member 60 is inserted into the sleeve 41 through the first insertion opening 411 and is movable in the axial direction of the syringe 10, and an end of the moving member 60 is in contact engagement with an end of the movable block 50. The second contact surface 61 on the end of the moving member 60 contacting the movable block 50 is a guiding inclined surface, and/or the third contact surface 52 on the end of the movable block 50 contacting the moving member 60 is a guiding inclined surface. In the initial state, the end of the moving piece 60 is in contact fit with the end of the movable block 50, at this time, the first contact surface 51 of the movable block 50 is separated from the outer side wall of the push rod 30, the movable block 50 cannot lock the push rod 30, and the push rod 30 can perform drawing motion; during injection, the moving member 60 can be pushed in along the axial direction of the syringe 10, under the guiding action of the guiding inclined plane, the moving member 60 pushes the movable block 50 to make the first contact surface 51 contact the outer side wall of the push rod 30, the movable block 50 can play a role in locking the push rod 30, and after pushing the moving member 60, the side wall of the moving member 60 abuts against the side wall of the movable block 50, so that the first contact surface 51 tightly contacts the outer side wall of the push rod 30.
In another embodiment, referring to fig. 3, the side wall of the sleeve 41 is provided with a second insertion opening 412. The moving member 60 is fitted into the sleeve 41 through the second insertion port 412, and the moving direction of the moving member 60 is adapted to the sliding direction of the movable block 50. Thus, pushing the moving member 60 slides the movable block 50 and contacts the outer sidewall of the push rod 30.
Further, the bone cement injector also includes a stop 70. The stop 70 has an insertion end 71. The side wall of the sleeve 41 is provided with a third insertion opening 413. The stopper 70 is fitted into the sleeve 41 through the third insertion port 413 and is movable in the axial direction of the syringe 10. The end surface of the movable block 50 facing the limiting member 70 is provided with a first insertion hole 53 into which the insertion end 71 can be inserted. When the first contact surface 51 of the movable block 50 contacts the outer sidewall of the push rod 30, the first insertion hole 53 corresponds to the position of the insertion end 71. Thus, after the movable block 50 is slid and contacts the outer sidewall of the push rod 30 by pushing the moving member 60, the first insertion hole 53 corresponds to the insertion end 71, and the insertion end 71 of the limiting member 70 is inserted into the first insertion hole 53, so that the limiting effect on the movable block 50 can be achieved. In addition, the end surface of the movable block 50 facing the limiting member 70 is provided with a second insertion hole into which the insertion end 71 can be inserted, and when the first contact surface 51 of the movable block 50 is separated from the outer side wall of the push rod 30, the insertion end 71 of the limiting member 70 can be inserted into the second insertion hole to limit the movable block 50.
With reference to fig. 1 to 3, the bone cement injector further comprises an elastic return 80 disposed in the sleeve 41. One end of the elastic return member 80 is connected to the inner side wall of the sleeve 41, and one end of the elastic return member 80 is connected to the side of the movable block 50 away from the movable member 60. Thus, when the bone cement injection process is completed, the elastic restoring member 80 pushes the movable block 50 to separate the first contact surface 51 of the movable block 50 from the outer sidewall of the push rod 30, thereby facilitating the completion of the restoring operation of the movable block 50. In this embodiment, the elastic restoring member 80 is a spring. The movable block 50 is provided with a first through hole 54, the push rod 30 is arranged in the first through hole 54, the outer diameter of the push rod 30 is smaller than the diameter of the first through hole 54, and the first contact surface 51 is arranged on the inner side wall of the first through hole 54.
In one embodiment, referring to fig. 4, the moving member 60 includes a gear 62 and a rotating shaft 63. The gear 62 is rotatably provided inside the sleeve 41, and the gear 62 is connected to the rotation shaft 63. The side wall of the sleeve 41 is provided with a second through hole. The rotation shaft 63 protrudes outside the sleeve 41 through the second through hole. The end surface of the movable block 50 is provided with a rack 55 meshed with the gear 62, and the setting direction of the rack 55 is adapted to the sliding direction of the movable block 50. In the initial state, the first contact surface 51 of the movable block 50 is separated from the outer side wall of the push rod 30, the movable block 50 cannot lock the push rod 30, and the push rod 30 can perform drawing motion; in the injection process, the gear 62 can be driven to rotate through the rotating shaft 63, the gear 62 drives the movable block 50 to move when rotating, the movable block 50 is pushed to enable the first contact surface 51 to contact the outer side wall of the push rod 30, and the movable block 50 can play a role in locking the push rod 30.
Further, the bone cement injector also includes a ratchet mechanism. The ratchet mechanism comprises a unidirectional ratchet wheel 64 and a pawl 65 matched with the unidirectional ratchet wheel 64. The one-way ratchet 64 is disposed coaxially with the gear 62, and the pawl 65 is rotatably disposed on the sleeve 41. The ratchet mechanism enables the gear 62 to rotate in only one direction, so that when the first contact surface 51 of the movable block 50 contacts with the outer side wall of the push rod 30, the gear 62 cannot rotate, and therefore the movable block 50 is limited, and the first contact surface 51 of the movable block 50 tightly contacts with the outer side wall of the push rod 30.
In one embodiment, referring to fig. 5, the moving member 60 includes a cam 66 and a swing lever 67. The cam 66 is rotatably disposed on the sleeve 41, the cam 66 is connected to the swing lever 67, and the cam 66 contacts a side wall of the movable block 50 away from the first stopper 42. The side wall of the sleeve 41 is provided with an opening area 44, and the swing rod 67 extends out of the sleeve 41 through the opening area 44. In this way, the swing rod 67 swings to drive the cam 66 to rotate, and after the cam 66 rotates, the movable block 50 can be pushed to move, so that the first contact surface 51 of the movable block 50 contacts the outer side wall of the push rod 30. In addition, after the cam 66 swings to push the movable block 50, since the first contact surface 51 of the movable block 50 contacts the outer sidewall of the push rod 30, the cam 66 cannot rotate continuously to form a locking state, so that the first contact surface 51 tightly abuts against the outer sidewall of the push rod 30.
In this embodiment, the bone cement injector further includes a handle 90. The other end of the push rod 30 is connected to the handle 90. The handle 90 at the end of the push rod 30 can facilitate driving the push rod 30 to rotate, which is beneficial to injecting bone cement into human body.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (10)
1. A bone cement injector, comprising:
the injection device comprises an injection cylinder, an injection piston and a push rod, wherein the injection piston is arranged in the injection cylinder, a first thread section is arranged on the outer side wall of the push rod, and one end of the push rod is connected with the injection piston;
a support assembly disposed on the syringe;
the movable block is slidably arranged on the supporting component and is provided with a first contact surface for contacting the outer side wall of the push rod, and a second thread section which is matched with the thread of the first thread section is arranged on the first contact surface; a kind of electronic device with high-pressure air-conditioning system
The moving piece is in transmission connection with the movable block and is used for driving the movable block to slide on the supporting component so as to enable the first contact surface to be in contact with the outer side wall of the push rod;
the support assembly comprises a sleeve, a first limiting block and a second limiting block, wherein the sleeve is arranged at the end part of the injection cylinder and sleeved outside the push rod; the first limiting block and the second limiting block are arranged on the inner side wall of the sleeve at intervals, and the movable block is slidably arranged between the first limiting block and the second limiting block; the movable block is provided with a first through hole, the movable block push rod is arranged in the first through hole, the outer diameter of the push rod is smaller than the diameter of the first through hole, the first contact surface is arranged on the inner side wall of the first through hole, the movable part is positioned on one side of the push rod, and the first limiting block and the second limiting block are positioned on the other opposite side of the push rod.
2. The bone cement injector according to claim 1, wherein the sleeve inner side wall is provided with a guide rail, and the movable block is correspondingly provided with a sliding block in sliding fit with the guide rail; or, the inner side wall of the sleeve is provided with a guide sleeve, and the movable block is correspondingly provided with a guide rod in sliding fit with the guide sleeve.
3. The bone cement injector according to claim 1, wherein the sleeve sidewall is provided with a first insertion port through which the moving member is inserted into the sleeve and movable in the axial direction of the syringe, the moving member end being in contact engagement with the movable block end; the second contact surface of the end part of the moving piece, which is contacted with the movable block, is a guide inclined surface, and/or the third contact surface of the end part of the movable block, which is contacted with the moving piece, is a guide inclined surface.
4. The bone cement injector according to claim 1, wherein the sleeve side wall is provided with a second insertion opening through which the moving member is inserted into the sleeve, and a moving direction of the moving member is adapted to a sliding direction of the movable block.
5. The bone cement injector according to claim 4, further comprising a stopper having an insertion end, wherein the sleeve side wall is provided with a third insertion opening through which the stopper is inserted into the sleeve and movable in the axial direction of the syringe, and wherein an end surface of the movable block facing the stopper is provided with a first insertion hole into which the insertion end can be inserted, the first insertion hole corresponding to the insertion end position when the first contact surface of the movable block contacts the outer side wall of the push rod.
6. The bone cement injector of claim 3 or 5, further comprising an elastic return member disposed within the sleeve, the elastic return member having one end connected to an inner sidewall of the sleeve and one end connected to a side of the movable block remote from the movable member.
7. The bone cement injector of claim 1, wherein the moving member comprises a gear and a rotational shaft; the gear is rotatably arranged inside the sleeve, the gear is connected with the rotating shaft, a second through hole is formed in the side wall of the sleeve, and the rotating shaft extends out of the sleeve through the second through hole; the end face of the movable block is provided with a rack meshed with the gear, and the setting direction of the rack is matched with the sliding direction of the movable block.
8. The bone cement injector of claim 7, further comprising a ratchet mechanism including a one-way ratchet and a pawl disposed in cooperation with the one-way ratchet, the one-way ratchet being disposed coaxially with the gear, the pawl being rotatably disposed on the sleeve.
9. The bone cement injector of claim 1, wherein the moving member comprises a cam and a swing rod; the cam is rotatably arranged on the sleeve, is connected with the swinging rod and is contacted with the side wall of the movable block far away from the first limiting block; the side wall of the sleeve is provided with an opening area, and the swing rod extends out of the sleeve through the opening area.
10. The bone cement injector of claim 1, further comprising a handle, the other end of the pushrod being connected to the handle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710414135.6A CN107224322B (en) | 2017-06-05 | 2017-06-05 | bone cement injector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710414135.6A CN107224322B (en) | 2017-06-05 | 2017-06-05 | bone cement injector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107224322A CN107224322A (en) | 2017-10-03 |
| CN107224322B true CN107224322B (en) | 2023-12-26 |
Family
ID=59936302
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710414135.6A Active CN107224322B (en) | 2017-06-05 | 2017-06-05 | bone cement injector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107224322B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109363762A (en) * | 2018-12-18 | 2019-02-22 | 艾科美医疗器械（深圳）有限公司 | A kind of negative pressure suction type bone cement device for casting and method for filling |
| CN111658003B (en) * | 2020-06-19 | 2021-08-20 | 浙江大学 | But pressure regulating medical science supersound is swept and is looked into device based on arm |
| CN112603519B (en) * | 2020-12-11 | 2022-02-15 | 南京佗道医疗科技有限公司 | Push injection stirring device |
| CN112790853B (en) * | 2020-12-21 | 2022-03-01 | 无锡市锡山人民医院 | Spinal bone cement injector with secondary injection mechanism |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103126759A (en) * | 2012-12-08 | 2013-06-05 | 宁波市鄞州云帆工程咨询有限公司 | Push rod disassembling double-way self-locking bone screw |
| CN204745218U (en) * | 2015-07-24 | 2015-11-11 | 冯强 | Paediatrics injection auxiliary device |
| CN105056337A (en) * | 2015-08-17 | 2015-11-18 | 上海聚民生物科技有限公司 | Balloon pressure injection pump |
| CN206081232U (en) * | 2016-07-15 | 2017-04-12 | 南阳医学高等专科学校第一附属医院 | High accuracy anesthetic syringe |
| CN106562819A (en) * | 2016-11-15 | 2017-04-19 | 河北医科大学第三医院 | Guiding apparatus used for minimally invasive surgery of orthopedics department |
| CN106618716A (en) * | 2017-02-16 | 2017-05-10 | 常州凯耀医疗器械有限公司 | Bone cement injector |
| CN207785268U (en) * | 2017-06-05 | 2018-08-31 | 广州爱锘德医疗器械有限公司 | Bone cement injector |
-
2017
- 2017-06-05 CN CN201710414135.6A patent/CN107224322B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103126759A (en) * | 2012-12-08 | 2013-06-05 | 宁波市鄞州云帆工程咨询有限公司 | Push rod disassembling double-way self-locking bone screw |
| CN204745218U (en) * | 2015-07-24 | 2015-11-11 | 冯强 | Paediatrics injection auxiliary device |
| CN105056337A (en) * | 2015-08-17 | 2015-11-18 | 上海聚民生物科技有限公司 | Balloon pressure injection pump |
| CN206081232U (en) * | 2016-07-15 | 2017-04-12 | 南阳医学高等专科学校第一附属医院 | High accuracy anesthetic syringe |
| CN106562819A (en) * | 2016-11-15 | 2017-04-19 | 河北医科大学第三医院 | Guiding apparatus used for minimally invasive surgery of orthopedics department |
| CN106618716A (en) * | 2017-02-16 | 2017-05-10 | 常州凯耀医疗器械有限公司 | Bone cement injector |
| CN207785268U (en) * | 2017-06-05 | 2018-08-31 | 广州爱锘德医疗器械有限公司 | Bone cement injector |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107224322A (en) | 2017-10-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107224322B (en) | bone cement injector | |
| US10441723B2 (en) | Variable fill drug delivery device | |
| CN102639169B (en) | Cartridge insertion assembly for drug delivery system | |
| US9616175B2 (en) | Frost protected injection device | |
| RU2387460C2 (en) | Automatic injector | |
| EP2774637B1 (en) | Cartridge interface assembly | |
| EP0692988B1 (en) | Manifold medication injection apparatus and method | |
| CA2652396C (en) | An injection device with mode locking means | |
| AU2007283996B2 (en) | Blocking element for a dosing mechanism | |
| US20150290082A1 (en) | Apparatuses, systems, and methods for filling a container with a liquid drug | |
| US20130030383A1 (en) | Injection device | |
| GB2458773A (en) | Inserting a cleaning member into a drill string | |
| RU2730986C2 (en) | System and method of plunger introduction into engagement with injector | |
| PL220720B1 (en) | Injection device with a reset mechanism of the dose | |
| JP2008043761A (en) | Syringe with adjustable screw guide | |
| CN104284689A (en) | Injection device | |
| CN105899248A (en) | Auto-injection device with button activation | |
| WO2015187913A1 (en) | Rotatable end of dose feedback mechanism | |
| AU2007207310A1 (en) | Pusher with a coupling element | |
| JP5755700B2 (en) | Syringe | |
| JP6569412B2 (en) | Drug administration device | |
| CN207785268U (en) | Bone cement injector | |
| EP3278826A1 (en) | Locking structure for injection pen | |
| EP3287160A1 (en) | Portable liquid drug delivery device | |
| TWI507176B (en) | Can be used with two kinds of dental anesthesia with the cartridge of the electric syringe |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |