A syringe

Abstract

The application relates to the technical field of medical devices, in particular to a push injector which comprises a shell, a puncture unit, a push injection unit, a gear unit and a driving unit arranged in the shell; wherein the puncture unit and the push injection unit are in sliding connection with the shell; the gear unit and the driving unit are in fixed connection with the shell; the driving unit is connected with the gear unit and drives the gear unit to rotate; the push injection unit is in abutment with the gear unit; the puncture unit is in engagement with the gear unit; in the rotating process of the gear unit, the push injection unit is driven to move forward, and the puncture unit is driven to move backward at the same time. The push injector provided by the application drives the push injection unit and the puncture unit to move at the same time through the action of the gear unit, so that the implantation process of the drainage tube and the withdrawal process of the puncture assembly are carried out synchronously, thereby helping to simplify the operation steps and improve the implantation efficiency.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and more particularly to an injection device. Background Technology

[0002] Glaucoma is a group of diseases characterized by optic nerve damage and corresponding visual field defects, with elevated intraocular pressure being one of its primary risk factors. Clinically, lowering intraocular pressure is currently the main treatment method for controlling the progression of glaucoma.

[0003] The current method for lowering intraocular pressure mainly involves implanting a drainage tube to remove aqueous humor from the anterior chamber, thereby reducing intraocular pressure.

[0004] The most common method for inserting a drainage tube involves first making a puncture at the corresponding site in the eye, then withdrawing the puncture device, and then inserting the drainage tube. This process is cumbersome and inefficient. Summary of the Invention

[0005] To address the cumbersome procedure involved in the implantation of drainage tubes in existing technologies, this invention provides an injection device. This device uses a gear assembly to push the drainage tube during implantation while simultaneously moving a rack connected to the puncture needle, thereby retracting the puncture needle. This synchronizes the implantation and retraction of the drainage tube, solving the problem of cumbersome procedures in existing technologies.

[0006] The technical solution adopted by this invention to solve its technical problem is:

[0007] An injection device includes a housing, and a puncture unit, an injection unit, a gear unit, and a drive unit disposed within the housing; wherein,

[0008] Both the puncture unit and the injection unit are slidably connected to the housing;

[0009] Both the gear unit and the drive unit are fixedly connected to the housing.

[0010] The drive unit is connected to the gear unit and drives the gear unit to rotate;

[0011] The injection unit abuts against the gear unit;

[0012] The puncture unit meshes with the gear unit;

[0013] During the rotation of the gear unit, the injection unit moves forward, while the puncture unit moves backward.

[0014] Optionally, the gear unit includes a first gear, a second gear, and a third gear that mesh in sequence; the first gear is connected to the drive unit; the injection unit abuts against the third gear; and the puncture unit meshes with the third gear.

[0015] Optionally, the third gear includes stacked injection gears and piercing gears; the injection gear abuts against the injection unit; the piercing gear meshes with the piercing unit; the injection gear is inserted into the piercing gear; and the injection gear meshes with the second gear.

[0016] Optionally, the bottom end of the injection gear is provided with a plug-in post; the piercing gear is provided with a plug-in groove that matches the plug-in post.

[0017] Optionally, a convex ring is provided at the center of the injection gear; the convex ring is an elliptical ring; the injection unit abuts against the convex ring.

[0018] Optionally, the injection unit includes a push rod; the push rod abuts against the convex ring.

[0019] Optionally, the injection unit may further include a flat-headed needle connected to the injector rod.

[0020] Optionally, the injection unit further includes a spring sleeved on the outside of the push rod.

[0021] 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.

[0022] Optionally, the puncture unit includes a puncture needle and a rack connected to the puncture needle; the rack meshes with the third gear.

[0023] Optionally, the drive unit includes a motor, and the motor includes a screw; the screw is connected to the gear unit.

[0024] Optionally, the drive unit further includes a battery; the battery is electrically connected to the motor.

[0025] The beneficial effects of this invention are:

[0026] The injector provided by this invention drives the injector 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, thereby helping to simplify the operation steps and improve the implantation efficiency. Attached Figure Description

[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0028] Figure 1This is a simplified structural diagram of the injector in this invention;

[0029] Figure 2 This is an exploded view of the injector of the present invention;

[0030] Figure 3 This is a simplified structural diagram of the third gear in this invention;

[0031] Figure 4 This is a simplified structural diagram of the injection gear in this invention;

[0032] Figure 5 This is a simplified structural diagram of the puncture gear in this invention.

[0033] In the diagram: 1-Housing; 11-Switch; 12-Start button; 2-Piercing unit; 21-Piercing needle; 22-Rack; 3-Injection unit; 31-Push rod; 311-Protrusion; 32-Flat-headed needle; 33-Spring; 4-Gear unit; 41-First gear; 42-Second gear; 43-Third gear; 431-Injection gear; 4311-Insertion post; 4312-Protruding ring; 432-Piercing gear; 4321-Insertion groove; 5-Drive unit; 51-Motor; 511-Screw; 52-Battery. Detailed Implementation

[0034] The present invention will now be described in further detail. The embodiments described below are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0035] In the description of this invention, it should be understood that the terms "first" and "second" are used only for simplification and should not be construed as indicating or implying relative importance, or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0036] In this invention, unless otherwise explicitly specified and limited, "above" or "below" a first feature may include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of a first feature above a second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" of a first feature below a second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0037] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0038] To address the problem in existing technologies where the insertion of the drainage tube and the withdrawal of the puncture component cannot be performed synchronously, this invention provides an injection device, see below. Figure 1 , Figure 2 As shown, the injector includes a housing 1, and a puncture unit 2, an injecting unit 3, a gear unit 4, and a drive unit 5 disposed within the housing 1. The puncture unit 2 is used to puncture the drainage tube before implantation; the injecting unit 2 is used to implant the drainage tube along the puncture site. Both the puncture unit 2 and the injecting unit 3 are slidably connected to the housing 1; both the gear unit 4 and the drive unit 5 are fixedly connected to the housing 1; and the drive unit 5 is connected to the gear unit 4 and drives the gear unit 4 to rotate. Simultaneously, the injecting unit 3 abuts against the gear unit 4; the puncture unit 2 meshes with the gear unit 4; during the rotation of the gear unit 4, it drives the injecting unit 3 forward and simultaneously drives the puncture unit 2 backward.

[0039] During operation, the injector is first held by hand, and then punctured at the drainage tube implantation site by the puncture unit 2. Then, the drive unit 5 drives the gear unit 4 to rotate. Since the injector unit 3 abuts against the gear unit 4 and the puncture unit 2 meshes with the gear unit 4, the rotation of the gear unit 4 pushes the injector unit 3 forward, that is, pushes the injector unit 3 to move away from the gear unit 4, thereby implanting the drainage tube. At the same time, the rotation of the gear unit 4 also drives the puncture unit 2, which meshes with it, to move closer to the gear unit 4, thereby withdrawing the puncture unit 2.

[0040] The injector provided by the present invention drives the injector 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 component withdrawal process are carried out synchronously, thereby helping to simplify the operation steps and improve the implantation efficiency.

[0041] The gear unit 4 in this invention includes a first gear 41, a second gear 42, and a third gear 43 that mesh in sequence; the first gear 41 is connected to the drive unit 5; the injection unit 3 abuts against the third gear 43; and the piercing unit 2 meshes with the third gear 43.

[0042] The first gear 41 is driven to rotate by the drive unit 5. During the rotation of the first gear 41, the second gear 42 and the third gear 43 are driven to rotate in sequence. The rotation of the third gear 43 pushes the injection unit 3 forward and at the same time drives the puncture unit 2 to retract, so as to realize the synchronization of the two actions.

[0043] For simplified operation steps, please refer to Figure 3 As shown, the third gear 43 includes a stacked injection gear 431 and a puncture gear 432; the injection gear 431 abuts against the injection unit 3 and is used to drive the injection unit 3 forward to realize the implantation of the drainage tube; the puncture gear 432 meshes with the puncture unit 2 and is used to drive the puncture unit 2 backward to realize the retraction of the puncture unit 2; at the same time, the injection gear 431 and the puncture gear 432 are inserted into each other, and the injection gear 431 meshes with the second gear 42 so that during the rotation of the gear unit 4, the injection unit 3 is driven forward and the puncture unit 2 is driven backward.

[0044] For details, see Figure 4 , Figure 5 As shown, in this invention, the bottom end of the push gear 431 is provided with a plug post 4311; the piercing gear 432 is provided with a plug groove 4321 that is adapted to the plug post 4311.

[0045] During the operation of the third gear 43, the rotation of the second gear 42 first drives the injection gear 431 to rotate. The rotation of the injection gear 431 first drives the injection unit 3 to move forward. At this time, the insertion post 4311 moves in the insertion groove 4321, while the piercing gear 432 remains stationary. When the insertion post 4311 moves to the edge of the insertion groove 4321, the injection gear 431 continues to rotate under the drive of the second gear 43. At this time, the piercing gear 432 begins to rotate under the drive of the insertion post 4311. Since the piercing gear 432 meshes with the piercing unit 2, the rotation of the piercing gear 432 drives the piercing unit 2 to move, thereby realizing the backward movement and retraction of the piercing unit 2.

[0046] To ensure successful insertion of the drainage tube, please refer to... Figure 4 As shown, the present invention preferably provides a convex ring 4312 at the shaft center of the injection gear 431; the convex ring 4312 is an elliptical ring, that is, the cross-section of the convex ring 4312 is elliptical; the injection unit 3 abuts against the convex ring 4312.

[0047] Since the convex ring 4312 is an elliptical ring, and the injection unit 3 abuts against the convex ring 4312, when the injection unit 3 contacts the position with a shorter diameter on the convex ring 4312 during the rotation of the injection gear 431, the injection unit 3 is located relatively close to the gear unit 4; as the injection gear 431 rotates, when the injection unit 3 contacts the position with a longer diameter on the convex ring 4312, the injection unit 3 moves away from the gear unit 4 under the pushing action of the convex ring 4312, thus achieving forward movement. During the forward movement, the drainage tube is pushed out, realizing the implantation of the drainage tube.

[0048] Specifically, the drainage tube implantation process is as follows: as the injection gear 431 rotates, the diameter of the convex ring 4312 that contacts 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 injection gear 431, thereby realizing the implantation of the drainage tube.

[0049] The preferred injection unit 3 of the present invention includes a push rod 31; the push rod 31 abuts against the convex ring 4312, so that the convex ring 4312 pushes the push rod 31 forward during the rotation of the third gear 43.

[0050] Furthermore, the injection unit 3 in this invention also includes a flat-headed needle 32 connected to the push rod 31. 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. Thus, by moving the push rod 31 forward, the flat-headed needle 32 can push the drainage tube forward to realize the implantation of the drainage tube.

[0051] To improve the stability of the drainage tube implantation and facilitate the repositioning of the injection unit 3, the injection unit 3 preferably includes a spring 33 sleeved on the outside of the push rod 31.

[0052] Specifically, the present invention preferably provides a protrusion 311 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.

[0053] During the forward movement of the injection unit 3, the spring 33 is squeezed by the protrusion 311, causing the push rod 31 to overcome the elastic force generated by the spring 33 under the pushing force of the convex ring 4312 and move away from the gear unit 4. After the drainage tube is implanted, as the third gear 43 rotates, the length of the diameter of the convex ring 4312 that contacts the push rod 31 changes from long to short. During this process, the elastic force of the spring 33 keeps the push rod 31 in contact with the convex ring 4312 and moves towards the third gear 431, thereby realizing the reset of the injection unit 3.

[0054] In addition, to ensure the smooth implantation of the drainage tube, the present invention may also provide a limiting groove or other limiting structure distributed along the length of the housing 1 to prevent the push rod 31 from moving laterally, so that the push rod 31 always abuts against the convex ring 4312.

[0055] To achieve puncture, the present invention preferably includes a puncture needle 21 for puncture, which is sleeved on the outside of the flat-headed needle 32; and a rack 22 connected to the puncture needle 21; the rack 22 meshes with the puncture gear 432, so that during the rotation of the puncture gear 432, the rack 22 can be driven to move towards the gear unit 4, and the puncture needle 21 can be retracted by the rack 22.

[0056] To reduce operational difficulty, the drive unit 5 of the present invention preferably includes a motor 51, which includes a screw 511; the screw 511 is connected to the gear unit 4, specifically, the screw 511 meshes with the first gear 41 through a threaded structure.

[0057] The motor 51 can be powered by a power source or by an energy storage device such as a battery. To improve convenience, the drive unit 5 preferably includes a battery 52. ​​The battery 52 is electrically connected to the motor 51 so that the motor 51 can be powered by the battery 52.

[0058] Furthermore, the present invention preferably also provides a switch 11 on the housing 1, which is electrically connected to the battery 52; at the same time, the housing 1 is also provided with a start button 12, which is electrically connected to the motor 51; when using the injector, first turn on the switch 11 so that the battery 52 supplies power to the motor 51; then press the start button 12 to start the motor 51 and begin the drainage tube implantation operation.

[0059] The injector provided by this invention is an electric injector, which reduces the number of operation steps, improves implantation efficiency, and also reduces the difficulty of operation.

[0060] The injector provided by the present invention can be programmed to reverse the motor after the drainage tube is implanted, so that the injector unit 3 and the puncture unit 2 are reset; a corresponding induction switch can also be set in the housing 1 to realize the reset, forward and backward actions of the injector unit 3 and the puncture unit 2.

[0061] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A syringe, characterized by, The utility model provides a kind of injection device, including shell (1), and the puncture unit (2) being arranged in the shell (1), bolus unit (3), gear unit (4) and drive unit (5);Wherein, The puncture unit (2), the bolus unit (3) are connected with the shell (1) slidingly; The gear unit (4) and the drive unit (5) are fixedly connected with the shell (1); The drive unit (5) is connected with the gear unit (4), and drives the gear unit (4) to rotate; The bolus unit (3) is abutted with the gear unit (4); The puncture unit (2) is engaged with the gear unit (4); The gear unit (4) rotates, and drives the bolus unit (3) to move forward, simultaneously drives the puncture unit (2) to move backward; The gear unit (4) includes first gear (41), second gear (42), third gear (43) engaged in turn;The first gear (41) is connected with the drive unit (5);The bolus unit (3) is abutted with the third gear (43);The puncture unit (2) is engaged with the third gear (43); The third gear (43) includes bolus gear (431) and puncture gear (432) stacked;The bolus gear (431) is abutted with the bolus unit (3);The puncture gear (432) is engaged with the puncture unit (2);The bolus gear (431) is inserted with the puncture gear (432);The bolus gear (431) is engaged with the second gear (42); The bottom end of the bolus gear (431) is provided with insertion column (4311);The puncture gear (432) is provided with insertion slot (4321) matched with the insertion column (4311).

2. The injector of claim 1 wherein, The shaft center of the bolus gear (431) is provided with convex ring (4312);The convex ring (4312) is oval ring;The bolus unit (3) is abutted with the convex ring (4312).

3. The injector of claim 2 wherein, The bolus unit (3) includes push rod (31);The push rod (31) is abutted with the convex ring (4312).

4. The injector of claim 3 wherein, The bolus unit (3) further includes flat head needle (32) connected with the push rod (31).

5. The injector of claim 3 wherein, The bolus unit (3) further includes spring (33) sleeved outside the push rod (31).

6. The injector of claim 5 wherein, The outside of the push rod (31) is provided with convex block (311), one end of the spring (33) is fixedly connected with the shell (1), and the other end is abutted with the convex block (311).

7. The injector of claim 1 wherein, The puncture unit (2) includes puncture needle (21), and rack (22) connected with the puncture needle (21);The rack (22) is engaged with the third gear (43).

8. The injector of any one of claims 1-7, wherein, The drive unit (5) includes motor (51), and the motor (51) includes screw rod (511);The screw rod (511) is connected with the gear unit (4).

9. The injector of claim 8 wherein, The drive unit (5) further includes battery (52);The battery (52) is electrically connected with the motor (51).

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