Pushing injector

Abstract

The invention relates to the technical field of medical apparatus and instruments, in particular to an injector which comprises a shell, and a puncture unit, an injection unit, a gear unit and a driving unit which are arranged in the shell, wherein the puncture unit and the injection unit are both in sliding connection with the shell; the gear unit and the driving unit are fixedly connected with the shell; the driving unit is connected with the gear unit and drives the gear unit to rotate; the injection unit is propped against the gear unit; the puncturing unit is meshed with the gear unit; in the rotating process of the gear unit, the pushing and injecting unit is driven to move forwards, and meanwhile the puncturing unit is driven to move backwards. According to the injector provided by the invention, the injection unit and the puncture unit are simultaneously driven to act through the action of the gear unit, so that the implantation process of the drainage tube and the withdrawing process of the puncture assembly are synchronously carried out, the operation steps are simplified, and the implantation efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to an injection device. Background Art

[0002] Glaucoma is a group of diseases characterized by optic neuropathy and corresponding visual field defects, and increased intraocular pressure is one of its primary risk factors. In the clinical treatment of glaucoma, lowering intraocular pressure is currently the main treatment method to control the progression of the disease.

[0003] The existing method of reducing intraocular pressure is mainly to implant a drainage tube to remove the aqueous humor in the anterior chamber to achieve the purpose of reducing intraocular pressure.

[0004] During the process of drainage tube implantation, the more common method is to first puncture the corresponding part of the eye, then withdraw the puncture component, and then implant the drainage tube. The operation process is cumbersome and has the problem of low efficiency. Summary of the invention

[0005] In order to solve the problem of complicated operation in the drainage tube implantation process in the prior art, the present invention provides a pusher, which pushes the drainage tube for implantation through a gear assembly, while driving the rack connected to the puncture needle to move, thereby retracting the puncture needle, so that the implantation process of the drainage tube is synchronized with the retraction process of the puncture needle, thereby solving the problem of complicated drainage tube implantation steps in the prior art.

[0006] The technical solution adopted by the present invention to solve its technical problem is: A push injector comprises a housing, and a puncture unit, a push injector unit, a gear unit and a drive unit arranged in the housing; wherein: The puncture unit and the injection unit are both slidably connected to the housing; The gear unit and the driving unit are both fixedly connected to the housing; The driving unit is connected to the gear unit and drives the gear unit to rotate; The push injection unit abuts against the gear unit; The puncture unit is meshed with the gear unit; During the rotation of the gear unit, the injection unit is driven to move forward and the puncture unit is driven to move backward.

[0007] Optionally, the gear unit includes a first gear, a second gear, and a third gear that are meshed with each other in sequence; the first gear is connected to the driving unit; the push injection unit is in contact with the third gear; and the puncture unit is meshed with the third gear. Optionally, the third gear includes a stacked push gear and a puncture gear; the push gear abuts against the push unit; the puncture gear is meshed with the puncture unit; the push gear is plugged into the puncture gear; the push gear is meshed with the second gear.

[0008] Optionally, a plug-in column is provided at the bottom end of the push gear; and a plug-in groove matched with the plug-in column is provided on the puncture gear.

[0009] Optionally, a convex ring is provided at the axis center of the push gear; the convex ring is an elliptical ring; and the push unit abuts against the convex ring.

[0010] Optionally, the push injection unit includes a push rod; the push rod abuts against the convex ring.

[0011] Optionally, the push injection unit further comprises a flat-head needle connected to the push rod.

[0012] Optionally, the push injection unit further includes a spring sleeved on the outside of the push rod.

[0013] Optionally, a protrusion is provided on the outer side of the push rod, one end of the spring is fixedly connected to the housing, and the other end abuts against the protrusion.

[0014] Optionally, the puncture unit includes a puncture needle and a rack connected to the puncture needle; the rack is meshed with the third gear.

[0015] Optionally, the driving unit includes a motor, and the motor includes a screw; the screw is connected to the gear unit.

[0016] Optionally, the driving unit further includes a battery; the battery is electrically connected to the motor.

[0017] The beneficial effects of the present invention are: The pusher provided by the present invention drives the pusher unit and the puncture unit to move simultaneously through the action of the gear unit, so that the drainage tube implantation process and the puncture component withdrawal process are carried out synchronously, which helps to simplify the operation steps and improve the implantation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0019] Figure 1 It is a simplified structural diagram of the push injector in the present invention; Figure 2 is an exploded view of the bolus of the present invention; Figure 3 is a simplified structural diagram of the third gear in the present invention; Figure 4It is a structural diagram of the push injection gear in the present invention; Figure 5 It is a structural diagram of the piercing gear in the present invention.

[0020] In the figure: 1-housing; 11-switch; 12-start button; 2-puncture unit; 21-puncture needle; 22-rack; 3-injection unit; 31-push rod; 311-bump; 32-flat-head needle; 33-spring; 4-gear unit; 41-first gear; 42-second gear; 43-third gear; 431-injection gear; 4311-plug-in column; 4312-convex ring; 432-puncture gear; 4321-plug-in slot; 5-drive unit; 51-motor; 511-screw; 52-battery. DETAILED DESCRIPTION

[0021] The present invention is now further described in detail. The embodiments described below are exemplary and intended to be used to explain the present invention, but cannot be understood as limiting the present invention. All other embodiments obtained by ordinary technicians in this field without creative work based on the embodiments of the present invention belong to the scope of protection of the present invention. In the description of the present invention, it should be understood that the terms "first" and "second" are only used to simplify the description, and should not be understood as indicating or implying relative importance, or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0022] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" the first feature may include that the first feature is in direct contact with the second feature, or may include that the first feature and the second feature are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0023] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0024] In order to solve the problem that the drainage tube implantation step and the puncture assembly withdrawal step cannot be performed synchronously in the prior art, the present invention provides an injection device, see Figure 1 , Figure 2As shown, the push injector includes a shell 1, and a puncture unit 2, a push injection unit 3, a gear unit 4 and a drive unit 5 arranged in the shell 1; wherein the puncture unit 2 is used to puncture before implanting the drainage tube; the push injection unit 2 is used to implant the drainage tube along the puncture position; the puncture unit 2 and the push injection unit 3 in the present invention are both slidably connected to the shell 1; the gear unit 4 and the drive unit 5 are both fixedly connected to the shell 1; and the drive unit 5 is connected to the gear unit 4 and drives the gear unit 4 to rotate; at the same time, the push injection unit 3 is in contact with the gear unit 4; the puncture unit 2 is meshed with the gear unit 4; during the rotation of the gear unit 4, the push injection unit 3 is driven to move forward and the puncture unit 2 is driven to move backward.

[0025] During the operation of the push injector, the push injector is first held, and after puncturing the drainage tube implantation site through the puncture unit 2, the gear unit 4 is driven to rotate through the driving unit 5; since the push injector unit 3 is in contact with the gear unit 4, and the puncture unit 2 is meshed with the gear unit 4, the push injector unit 3 is pushed forward during the rotation of the gear unit 4, that is, the push injector unit 3 is pushed to move in the direction away from the gear unit 4, and then the drainage tube is implanted through its forward movement; at the same time, the rotation process of the gear unit 4 will also drive the puncture unit 2 meshed with it to move in the direction close to the gear unit 4, so as to realize the withdrawal of the puncture unit 2.

[0026] The pusher provided by the present invention drives the pusher unit 3 and the puncture unit 2 to move simultaneously through the action of the gear unit 4, so that the drainage tube implantation process and the puncture assembly withdrawal process are carried out synchronously, which helps to simplify the operation steps and improve the implantation efficiency.

[0027] The gear unit 4 in the present invention comprises a first gear 41 , a second gear 42 , and a third gear 43 meshing with each other in sequence; the first gear 41 is connected to the driving unit 5 ; the injection unit 3 abuts against the third gear 43 ; and the puncture unit 2 meshes with the third gear 43 .

[0028] The driving unit 5 drives the first gear 41 to rotate. During the rotation of the first gear 41, the second gear 42 and the third gear 43 are driven to rotate in turn; through the rotation of the third gear 43, the injection unit 3 is pushed forward, and the puncture unit 2 is driven to be withdrawn, thereby realizing the synchronization of the two actions.

[0029] To simplify the steps, see Figure 3As shown, the third gear 43 includes a stacked push gear 431 and a puncture gear 432; the push gear 431 is in contact with the push unit 3, and is used to drive the push unit 3 to move forward to achieve drainage tube implantation; the puncture gear 432 is meshed with the puncture unit 2, and is used to drive the puncture unit 2 to move backward to achieve the withdrawal of the puncture unit 2; at the same time, the push gear 431 is plugged into the puncture gear 432, and the push gear 431 is meshed with the second gear 42, so that during the rotation of the gear unit 4, the push unit 3 is driven forward and the puncture unit 2 is driven backward.

[0030] For details, see Figure 4 , Figure 5 As shown, in the present invention, a plug-in column 4311 is disposed at the bottom end of the push gear 431 ; and a plug-in groove 4321 matched with the plug-in column 4311 is disposed on the piercing gear 432 .

[0031] During the working process of the third gear 43, the push gear 431 is first driven to rotate by the rotation of the second gear 42. Through the rotation of the push gear 431, the push unit 3 is first driven to move forward. At this time, the plug-in column 4311 moves in the plug-in slot 4321, and the puncture gear 432 remains stationary; when the plug-in column 4311 moves to the edge of the plug-in slot 4321, the push gear 431 continues to rotate driven by the second gear 43. At this time, driven by the plug-in column 4311, the puncture gear 432 starts to rotate; because the puncture gear 432 is meshed with the puncture unit 2, during the rotation of the puncture gear 432, the puncture unit 2 is driven to move, thereby realizing the backward movement and withdrawal of the puncture unit 2.

[0032] To ensure successful placement of the drainage tube, refer to Figure 4 As shown, in the present invention, a convex ring 4312 is preferably provided at the axis center of the push gear 431; the convex ring 4312 is an elliptical ring, that is, the cross section of the convex ring 4312 is an ellipse; the push unit 3 is in contact with the convex ring 4312.

[0033] Since the convex ring 4312 is an elliptical ring and the push injection unit 3 is in contact with the convex ring 4312, during the rotation of the push injection gear 431, when the push injection unit 3 contacts the position with a shorter diameter on the convex ring 4312, the push injection unit 3 is located relatively close to the gear unit 4; as the push injection gear 431 rotates, when the push injection unit 3 contacts the position with a longer diameter on the convex ring 4312, the push injection unit 3 moves away from the gear unit 4 under the push of the convex ring 4312, thereby achieving forward movement. During the forward movement, the drainage tube is pushed out to achieve the implantation of the drainage tube.

[0034] Specifically, the drainage tube implantation process is as follows: as the push gear 431 rotates, the length of the diameter on the convex ring 4312 in contact with the push rod 31 changes from short to long. During this process, under the push of the convex ring 4312, the push rod 31 moves away from the push gear 431, thereby achieving the implantation of the drainage tube.

[0035] In the present invention, the push injection unit 3 preferably includes a push rod 31 ; the push rod 31 abuts against the convex ring 4312 , so that when the third gear 43 rotates, the convex ring 4312 pushes the push rod 31 forward.

[0036] Furthermore, the push injection unit 3 in the present invention also includes a flat-headed needle 32 connected to the push rod 31, and the flat-headed needle 32 is located at the end of the push rod 31 away from the gear unit 4. The drainage tube for implantation can be placed at the front end of the flat-headed needle 32, that is, the drainage tube is placed at the end of the flat-headed needle 32 away from the push rod 31, so that through the forward movement of the push rod 31, the flat-headed needle 32 can push the drainage tube forward, thereby realizing the implantation of the drainage tube.

[0037] In order to improve the stability of the drainage tube implantation and facilitate the resetting of the push injection unit 3, the push injection unit 3 of the present invention preferably further includes a spring 33 sleeved on the outside of the push rod 31.

[0038] Specifically, in the present invention, a protrusion 311 is preferably provided on the outer side of the push rod 31 , one end of the spring 33 is fixedly connected to the housing 1 , and the other end is in contact with the protrusion 311 .

[0039] During the forward movement of the push-injection unit 3, the spring 33 is squeezed by the protrusion 311, so that the push rod 31 overcomes the elastic force generated by the spring 33 under the thrust of the convex ring 4312, and moves in the direction away from the gear unit 4; after the drainage tube is implanted, as the third gear 43 rotates, the length of the diameter on the convex ring 4312 in contact with the push rod 31 changes from long to short. In this process, the elastic force of the spring 33 keeps the push rod 31 in contact with the convex ring 4312 and moves in the direction close to the third gear 431, thereby realizing the resetting of the push-injection unit 3.

[0040] In addition, to ensure smooth implantation of the drainage tube, the present invention may also provide limiting grooves distributed along the length direction of the shell 1, or other limiting structures to prevent the push rod 31 from lateral movement, so that the push rod 31 is always in contact with the convex ring 4312.

[0041] To achieve puncture, the present invention preferably includes a puncture unit 2 that includes a puncture needle 21 for puncture, which is sleeved on the outside of the flat-head needle 32; and a rack 22 connected to the puncture needle 21; the rack 22 is meshed with the puncture gear 432, so that during the rotation of the puncture gear 432, the rack 22 can be driven to move toward the direction close to the gear unit 4, and the puncture needle 21 can be driven to withdraw through the rack 22.

[0042] To reduce the difficulty of operation, the present invention preferably has the driving unit 5 include a motor 51, and the motor 51 includes a screw 511; the screw 511 is connected to the gear unit 4, and specifically, the screw 511 is meshed with the first gear 41 through a threaded structure.

[0043] The motor 51 can be powered by connecting to a power source, or by using an energy storage element such as a battery. To improve convenience, the drive unit 5 of the present invention preferably also includes a battery 52 . The battery 52 is electrically connected to the motor 51 so that the battery 52 can power the motor 51 .

[0044] Furthermore, in the present invention, a switch 11 is preferably provided on the shell 1, and the switch 11 is electrically connected to the battery 52; at the same time, a start button 12 is also provided on the shell 1, and the start button 12 is electrically connected to the motor 51; when the injector is used, the switch 11 is first turned on so that the battery 52 supplies power to the motor 51; then the start button 12 is pressed to start the motor 51 and start the drainage tube implantation operation.

[0045] The push injector provided by the present invention is an electric push injector, which reduces the operation steps, improves the implantation efficiency, and also reduces the operation difficulty.

[0046] The push injector provided by the present invention can be programmed to select motor reversal after the drainage tube is implanted, so that the push injector unit 3 and the puncture unit 2 are reset; a corresponding induction switch can also be arranged in the shell 1 to realize the reset, forward movement, backward movement and other actions of the push injector unit 3 and the puncture unit 2 through the induction switch.

[0047] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A push syringe, characterized in that: It comprises a housing (1), and a puncture unit (2), a push injection unit (3), a gear unit (4), and a drive unit (5) arranged in the housing (1); wherein: The puncture unit (2) and the injection unit (3) are both slidably connected to the housing (1); The gear unit (4) and the drive unit (5) are both fixedly connected to the housing (1); The driving unit (5) is connected to the gear unit (4) and drives the gear unit (4) to rotate; The push injection unit (3) is in abutment with the gear unit (4); The puncture unit (2) is meshed with the gear unit (4); During the rotation of the gear unit (4), the injection unit (3) is driven to move forward, and the puncture unit (2) is driven to move backward.

2. The injector according to claim 1, characterized in that: The gear unit (4) comprises a first gear (41), a second gear (42), and a third gear (43) which mesh with each other in sequence; the first gear (41) is connected to the driving unit (5); the injection unit (3) is in contact with the third gear (43); and the puncture unit (2) is meshed with the third gear (43).

3. The injector according to claim 2, characterized in that: The third gear (43) comprises a stacked push gear (431) and a puncture gear (432); the push gear (431) is in contact with the push unit (3); the puncture gear (432) is meshed with the puncture unit (2); the push gear (431) is plugged into the puncture gear (432); and the push gear (431) is meshed with the second gear (42).

4. The injector according to claim 3, characterized in that: The bottom end of the push gear (431) is provided with a plug-in column (4311); and the piercing gear (432) is provided with a plug-in groove (4321) adapted to the plug-in column (4311).

5. The injector according to claim 2, characterized in that: A convex ring (4312) is provided at the axis of the push gear (431); the convex ring (4312) is an elliptical ring; and the push unit (3) is in contact with the convex ring (4312).

6. The injector according to claim 5, characterized in that: The push-injection unit (3) comprises a push rod (31); the push rod (31) is in abutment with the convex ring (4312).

7. The injector according to claim 6, characterized in that The push injection unit (3) further comprises a flat-head needle (32) connected to the push rod (31).

8. The injector according to claim 6, characterized in that The push injection unit (3) further comprises a spring (33) sleeved on the outside of the push rod (31).

9. The injector according to claim 8, characterized in that A protrusion (311) is provided on the outer side of the push rod (31); one end of the spring (33) is fixedly connected to the housing (1), and the other end abuts against the protrusion (311).

10. The injector according to claim 2, characterized in that: The puncture unit (2) comprises a puncture needle (21) and a rack (22) connected to the puncture needle (21); the rack (22) is meshed with the third gear (43).

11. The injector according to any one of claims 1 to 10, characterized in that: The driving unit (5) comprises a motor (51), and the motor (51) comprises a screw rod (511); the screw rod (511) is connected to the gear unit (4).

12. The injector according to claim 11, characterized in that The drive unit (5) further comprises a battery (52); the battery (52) is electrically connected to the motor (51).

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