Umbrella-shaped handheld syringe

Abstract

The umbrella-shaped handheld syringe comprises a syringe needle and an outer cylinder, the syringe needle is detachably installed at the front end of the outer cylinder, the outer cylinder is composed of a liquid storage part and a working part, the liquid storage part comprises a liquid storage cylinder body, a liquid storage bag body is arranged in the liquid storage cylinder body, and the working part is connected with the liquid storage bag body. Pressure is applied to the tail part of the liquid storage bag body to force the liquid in the liquid storage bag body to be discharged along the front end of the liquid storage bag body; the working part comprises a working barrel, a propelling piston is arranged in the working barrel, an umbrella-shaped propelling gripper is arranged outside the working barrel, and the propelling gripper is contracted inwards and then obliquely and downwards presses the propelling piston through a component penetrating through the working barrel, so that the propelling piston is forced to slide forwards and extrude the tail part of the liquid storage bag body. When the injector is used, the injector is held by a single hand in a pen holding mode, the two fingers press the pushing gripper inwards, the pushing gripper presses the pushing piston downwards to extrude the liquid storage bag body to complete injection operation, operation is fast and convenient, operation can be completed by the single hand, and stability is high.

Description

Technical Field

[0001] This disclosure relates to the field of drug delivery and injection equipment technology, specifically to an umbrella-shaped grip syringe. Background Technology

[0002] The information disclosed in this background section is intended only to enhance understanding of the overall background of this disclosure and is not necessarily an admission or implication in any way that such information constitutes related technology that is already known to those skilled in the art.

[0003] In ophthalmology, intravitreal injections are necessary for the treatment of certain eye conditions. The instruments used for intravitreal injections are typically syringes, employing either a push-in or knob-type injection method. However, in practice, the vitreous body has a small operating area, and the push-in syringe requires the thumb to press and advance the needle, resulting in a relatively long distance between the needle and hand. Holding the syringe with one hand can easily cause the needle to wobble, requiring the other hand to stabilize the needle. Since the eyeball is a rotating organ, a slow insertion method causes constant eyeball rotation, making injection difficult, while rapid insertion can easily cause injury. Therefore, intravitreal injections generally require two people: one to inject and the other to stabilize the eyeball. Furthermore, the coordination between the two is difficult to control, increasing the surgical difficulty and increasing the risk of accidents due to low teamwork, resulting in very low efficiency. Utility Model Content

[0004] This addresses the problems in related technologies, such as the difficulty in operating existing intravitreal injection instruments, which leads to the need for multiple operators, low coordination, easy accidents, and reduced efficiency.

[0005] To address the aforementioned problems and achieve the goal of providing an instrument that allows a single person to perform intravitreal injections, the embodiments of this disclosure provide the following technical solution:

[0006] In an embodiment of this disclosure, an umbrella-shaped grip syringe is provided, including an injection needle and an outer barrel. The injection needle is detachably mounted on the front end of the outer barrel. The outer barrel includes a liquid reservoir and a working part that are mated to each other. The injection needle is mounted on the front end of the liquid reservoir.

[0007] The liquid storage section includes a liquid storage cylinder, inside which is a liquid storage bladder. Pressure is applied to the tail of the liquid storage bladder to force the liquid inside to be discharged along the front of the liquid storage bladder.

[0008] The working part includes a working cylinder, inside which is provided a propulsion piston, and outside which is provided an umbrella-shaped propulsion gripper. After the propulsion gripper retracts inward, it presses the propulsion piston obliquely downward through a component passing through the working cylinder, forcing the propulsion piston to slide forward and squeeze the tail of the liquid storage bladder.

[0009] In one embodiment of this disclosure, the propulsion gripper includes an annular assembly disposed at the end of the working cylinder. The annular assembly includes a bushing with a plurality of mounting positions. A movable arm is movably connected to each mounting position via an annular spindle. The movable arm is provided with an adjustable support rod. The propulsion piston is provided with a plurality of annular slots. The support rod passes through the working cylinder and is engaged in the slots.

[0010] In one embodiment of this disclosure, the mounting position is provided with an arc-shaped guard member near the outer side of the annular assembly. The mounting position is also provided with a torsion spring, the support member of which is located on the inner side of the annular assembly, and one of the support members is fastened to the movable arm.

[0011] In one embodiment of this disclosure, the bottom of the bushing is provided with an inwardly extending fixed edge, which covers the end face of the working cylinder, and the width of the fixed edge is less than the thickness of the cylinder wall of the working cylinder.

[0012] In one embodiment of this disclosure, the end of the support rod is mounted on the movable arm via a shaft connection structure, and the shaft connection structure is provided with an inwardly inclined stop, forming an angle α between the support rod and the movable arm.

[0013] In one embodiment of this disclosure, the working cylinder is provided with a plurality of strip holes for the support rods to pass through. The strip holes are located within the maximum projection area of ​​the support rods, and the length of the strip holes is greater than half the length of the support rods.

[0014] In one embodiment of this disclosure, the outer cylinder is further provided with a check valve, which is disposed between the liquid storage part and the working part. The check valve includes a retaining ring, and the inner side of the retaining ring is provided with a plurality of elastic tongues facing the liquid storage part.

[0015] In one embodiment of this disclosure, the fixing ring is an annular sheet structure, and a plurality of elastic tongues are evenly disposed on the fixing ring with an included angle between them. The elastic tongues are arc-shaped structures with their outer arc surfaces facing the center of the outer cylinder.

[0016] In one embodiment of this disclosure, the liquid storage bladder includes a liquid tube whose shape conforms to the inner wall of the liquid storage cylinder. The front end of the liquid tube has a conical liquid outlet, and the rear end of the liquid tube is provided with a bladder piston. Multiple support ribs are provided between the bladder piston and the liquid tube. The injection needle is mounted on the outer cylinder or the liquid tube.

[0017] In one embodiment of this disclosure, the outer cylinder is provided with an outer cover at its tail end, and the outer cover is fastened to the outer cylinder via a snap-fit ​​connection.

[0018] According to the embodiments of this disclosure, the syringe has the following advantages: it includes an injection needle and an outer barrel. The injection needle is detachably mounted on the front end of the outer barrel. The outer barrel consists of a liquid reservoir and a working part. The liquid reservoir includes a liquid reservoir body, inside which is a liquid reservoir sac. Pressure is applied to the tail end of the liquid reservoir sac to force the liquid inside to be discharged along the front end of the liquid reservoir sac. The working part includes a working barrel, inside which is a push piston. An umbrella-shaped push handle is provided on the outside of the working barrel. After the push handle retracts inward, it pushes the push piston obliquely downward through a component passing through the working barrel, forcing the push piston to slide forward and squeeze the tail end of the liquid reservoir sac. In use, the syringe is held in a pen-like manner with one hand, and two fingers press the push handle inward. The push handle pushes the piston downward to squeeze the liquid reservoir sac to complete the injection operation. The pen-like operation method is quick and convenient, and the operation can be completed with one hand. The other hand is used to stabilize the eyeball, which is highly stable. The operation is quick and convenient, improving efficiency and avoiding accidents caused by multiple people operating the syringe. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments or related technologies of this disclosure, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0020] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which this disclosure can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effectiveness and purpose that this disclosure can achieve, should still fall within the scope of the technical content disclosed herein.

[0021] Figure 1 This is a front view of an umbrella-shaped grip syringe according to an exemplary embodiment;

[0022] Figure 2 for Figure 1 Sectional view along line AA;

[0023] Figure 3 This is a front view of the working cylinder according to an exemplary embodiment;

[0024] Figure 4 This is a front view of a ring-shaped assembly according to an exemplary embodiment;

[0025] Figure 5 for Figure 4 Sectional view along the BB direction;

[0026] Figure 6 This is a front view of the structure at the movable arm according to an exemplary embodiment;

[0027] Figure 7 This is a top view of the structure at the movable arm according to an exemplary embodiment;

[0028] Figure 8 A front view of a check valve according to an exemplary embodiment;

[0029] Figure 9 for Figure 8 C-axis sectional view;

[0030] Figure 10 This is a front view of a reservoir body according to an exemplary embodiment.

[0031] In the diagram: 1. Injection needle; 2. Liquid reservoir; 3. Liquid reservoir body; 31. Liquid tube; 32. Liquid outlet; 33. Capsule piston; 34. Support rib; 4. Working cylinder; 41. Strip hole; 5. Push piston; 51. Slot; 6. Push gripper; 61. Annular assembly; 62. Mounting position; 63. Bushing; 64. Mandrel; 65. Movable arm; 66. Support rod; 67. Barrier; 68. Torsion spring; 69. Fixed edge; 610. Shaft connection structure; 611. Stop block; 7. Check valve; 71. Retaining ring; 72. Elastic tongue; 8. Outer cover. Detailed Implementation

[0032] The following specific embodiments illustrate the implementation of this disclosure. Those skilled in the art can easily understand other advantages and effects of this disclosure from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0033] The terms “upper,” “lower,” “left,” “right,” and “middle” used in this specification are merely for clarity of description and are not intended to limit the scope of this disclosure. Any changes or adjustments to their relative relationships, without substantially altering the technical content, shall also be considered within the scope of this disclosure.

[0034] like Figure 1 , Figure 2The diagram illustrates an embodiment of an umbrella-shaped grip syringe provided by this disclosure. It includes an injection needle 1 and an outer barrel. The injection needle 1 is detachably mounted on the front end of the outer barrel, and an outer cap 8 is provided at the rear end of the outer barrel. The outer cap 8 is fastened to the outer barrel via a latch. The outer barrel consists of a liquid storage section and a working section. The liquid storage section includes a liquid storage cylinder 2, inside which is a liquid storage bladder 3. Pressure is applied to the rear end of the liquid storage bladder 3 to force the liquid inside to be discharged along the front end of the liquid storage bladder 3. The working section includes a working cylinder 4, inside which is a push piston 5. An umbrella-shaped push handle 6 is provided on the outside of the working cylinder 4. After the push handle 6 retracts inward, it presses the push piston 5 obliquely downward through a component passing through the working cylinder 4, forcing the push piston 5 to slide forward and squeeze the rear end of the liquid storage bladder 3.

[0035] The syringe and the working part are connected by a screw assembly. The syringe reservoir 3 is a refillable, independent structure, which allows for independent packaging and aseptic treatment. In use, the syringe is held in one hand like a pen, with two fingers pressing inward to advance the gripper 6. Advancing the gripper 6 pushes down, causing the piston to squeeze the syringe reservoir 3 and complete the injection. This pen-like operation method is quick and convenient, allowing for operation with just one hand. The other hand is used to stabilize the eyeball, ensuring high stability and improving efficiency while preventing accidents caused by multiple people operating the syringe.

[0036] like Figure 4 , Figure 5 As shown, the propulsion gripper 6 includes an annular assembly 61 disposed at the end of the working cylinder 4. The annular assembly 61 includes a bushing 63 having several mounting positions 62. A movable arm 65 is movably connected to the mounting position 62 via an annular spindle 64. An adjustable support rod 66 is provided on the movable arm 65. The propulsion piston 5 is provided with multiple annular slots 51. The support rod 66 passes through the working cylinder 4 and is obliquely supported in the slots 51.

[0037] By setting the bushing 63 structure, one end of the movable arm 65 is fixed in the bushing and can be adjusted along the bushing 63. The movable support rod 66 is inserted into the working cylinder 4 and locked in the slot 51 of the push piston 5. Pressing the movable arm 65 inward causes the support rod 66 to push the push piston 5 to slide forward.

[0038] Specifically, the end of the strut 66 is mounted on the movable arm 65 via a shaft connection structure 610. The shaft connection structure 610 has an inwardly inclined stop 611 on its outside. The purpose of the stop 611 is to prevent the strut from opening excessively outward. An angle α is formed between the strut 66 and the movable arm 65, and this angle α is an acute angle.

[0039] Among them, such as Figure 3As shown, the working cylinder 4 is provided with several strip holes 41 for the support rod 66 to pass through. The strip holes 41 are located in the maximum projection area of ​​the support rod 66, and the length of the strip holes 41 is greater than half the length of the support rod 66.

[0040] To avoid the movable arm opening too far outward at an excessive angle, such as Figure 6 , Figure 7 As shown, the mounting position 62 is provided with an arc-shaped baffle 67. The baffle 67 is located near the outer side of the annular assembly 61, which limits the angle at which the movable arm 65 opens outward, so that the push gripper 6 maintains an umbrella-shaped structure. Optionally, it can also be connected by pull ropes on the inner side of all movable arms 65.

[0041] To ensure that the movable arm 65 can rebound in time after being pressed and to carry out continuous pressing, a torsion spring 68 is also provided in the mounting position 62. The support of the torsion spring 68 is located on the inner side of the annular kit 61, and one of the support members is fastened to the movable arm 65. The fastening of one support member of the torsion spring 68 to the movable arm 65 can determine its installation position.

[0042] See you again Figure 4 , Figure 5 As shown, the bottom of the bushing 63 is provided with an inwardly extending fixed edge 69. The fixed edge 69 covers the end face of the working cylinder 4. The width of the fixed edge 69 is less than the thickness of the cylinder wall of the working cylinder 4. The fixed edge 69 wraps around the end face of the working cylinder 4 to prevent the bushing 63 from sliding to the rear end of the working cylinder 4 after installation, which would affect the pushing effect of the support rod 66. Furthermore, the fixed edge 69 located on the end face of the working cylinder 4 is clamped in the upper structure position between the liquid storage cylinder 2 and the working cylinder 4 after installation, ensuring the absolute stability of the pushing gripper 6. The pushing gripper 6 is a structure that is pre-installed on the working cylinder 4.

[0043] During use, to prevent the piston 5 from sliding backward and retracting, such as Figure 8 , Figure 9 As shown, the outer cylinder is also equipped with a check valve 7, which is located between the liquid storage section and the working section. The check valve 7 includes a retaining ring 71, and the inner side of the retaining ring 71 is provided with a plurality of elastic tongues 72 facing the liquid storage section. After the push piston 5 moves forward, the elastic tongues 72 are directly locked in the slots 51 of the push piston 5, thereby preventing it from retracting backward.

[0044] In one embodiment of this disclosure, in order to ensure the stability of the check valve 7, the check valve 7 is clamped in the upper structure position between the liquid storage cylinder 2 and the working cylinder 4. The fixing ring 71 is an annular sheet structure, and multiple elastic tongues 72 are evenly arranged on the fixing ring 71, with an included angle between them. The elastic tongues 72 are arc-shaped structures, with their outer arc surface facing the center of the outer cylinder.

[0045] In one embodiment of this disclosure, such as Figure 10 As shown, it is an independent liquid storage bladder 3, which includes a liquid tube 31 whose shape fits the inner wall of the liquid storage cylinder 2. The front end of the liquid tube 31 has a conical liquid outlet 32, and the rear end of the liquid tube 31 is provided with a bladder piston 33. Multiple support ribs 34 are provided between the bladder piston 33 and the liquid tube 31, and the support ribs 34 are symmetrically arranged. The injection needle 1 is installed on the outer cylinder or the liquid tube 31. The purpose of the support ribs 34 in this structure is to prevent the bladder piston 33 from being accidentally bumped and causing the liquid to be pushed out when the liquid storage bladder 3 is placed independently. The liquid outlet 32 ​​can be provided with a sterile seal.

[0046] In one embodiment of this disclosure, since the liquid storage cylinder 2 and the working cylinder 4 are separate structures, before use, the supporting rib 34 on the liquid storage bladder 3 is removed and placed inside the liquid storage cylinder 2. The check valve 7 is placed into the installation port of the liquid storage cylinder 2. The working cylinder 4 is then rotated and installed at the installation port of the liquid storage cylinder 2 and tightened. The piston 5 can be installed by pre-opening the outer cover 8 and inserting it from the tail of the working cylinder 4. After preparation, the sterile seal is removed, and the injection needle 1 is installed at the liquid outlet 32 ​​or the external mounting position 62 of the outer cylinder for operation. The application scenario disclosed in this technical effect is only one of the single-handed injection operations and is not limited to this scenario.

[0047] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0048] Although the present disclosure has been described in detail above with general descriptions and specific embodiments, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, such modifications or improvements made without departing from the spirit of the present disclosure are all within the scope of protection claimed by the present disclosure.

Claims

1. An umbrella-shaped grip syringe, comprising an injection needle and an outer barrel, characterized in that, The injection needle is detachably mounted on the front end of the outer cylinder, which includes a liquid storage section and a working section that are connected to each other, and the injection needle is mounted on the front end of the liquid storage section. The liquid storage section includes a liquid storage cylinder, inside which is a liquid storage bladder. Pressure is applied to the tail of the liquid storage bladder to force the liquid inside to be discharged along the front of the liquid storage bladder. The working part includes a working cylinder, inside which is provided a propulsion piston, and outside which is provided an umbrella-shaped propulsion gripper. After the propulsion gripper retracts inward, it presses the propulsion piston obliquely downward through a component passing through the working cylinder, forcing the propulsion piston to slide forward and squeeze the tail of the liquid storage bladder.

2. The umbrella-shaped grip syringe according to claim 1, characterized in that, The propulsion gripper includes an annular assembly disposed at the end of the working cylinder. The annular assembly includes a bushing with several mounting positions. A movable arm is movably connected to each mounting position via an annular spindle. The movable arm is provided with an adjustable support rod. The propulsion piston is provided with multiple annular slots. The support rod passes through the working cylinder and is engaged in the slots.

3. The umbrella-shaped grip syringe according to claim 2, characterized in that, The mounting position is provided with an arc-shaped guard, which is located near the outer side of the annular assembly. The mounting position is also provided with a torsion spring, the support of which is located on the inner side of the annular assembly, and one of the supports is fastened to the movable arm.

4. The umbrella-shaped grip syringe according to claim 3, characterized in that, The bottom of the bushing is provided with an inwardly extending fixed edge, which covers the end face of the working cylinder. The width of the fixed edge is less than the thickness of the cylinder wall of the working cylinder.

5. The umbrella-shaped grip syringe according to claim 4, characterized in that, The end of the support rod is mounted on the movable arm via a shaft connection structure. The shaft connection structure is provided with an inwardly inclined stop, and an angle α is formed between the support rod and the movable arm.

6. The umbrella-shaped grip syringe according to claim 5, characterized in that, The working cylinder has several strip-shaped holes for the support rods to pass through. The strip-shaped holes are located within the maximum projection area of ​​the support rods, and the length of the strip-shaped holes is greater than half the length of the support rods.

7. The umbrella-shaped grip syringe according to claim 1, characterized in that, The outer cylinder is also provided with a check valve, which is located between the liquid storage part and the working part. The check valve includes a fixing ring, and the inner side of the fixing ring is provided with a plurality of elastic tongues facing the liquid storage part.

8. The umbrella-shaped grip syringe according to claim 7, characterized in that, The fixing ring is a ring-shaped sheet structure, and multiple elastic tongues are evenly arranged on the fixing ring with an included angle between them. The elastic tongues are arc-shaped with their outer arc surfaces facing the center of the outer cylinder.

9. The umbrella-shaped grip syringe according to claim 1, characterized in that, The liquid storage bladder includes a liquid tube whose shape fits the inner wall of the liquid storage cylinder. The front end of the liquid tube has a conical liquid outlet, and the rear end of the liquid tube is provided with a bladder piston. Multiple support ribs are provided between the bladder piston and the liquid tube. The injection needle is installed on the outer cylinder or the liquid tube.

10. The umbrella-shaped grip syringe according to claim 1, characterized in that, The outer cylinder is provided with an outer cover at its tail end, and the outer cover is fastened to the outer cylinder by means of a fastener.

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