Syringe with automatic needle separation structure

Abstract

The utility model discloses an injector with a needle head automatic separation structure, which can easily and safely separate a pintle through the structure of the injector, can maintain the silent state of the separation structure when pushing and injecting liquid medicine, and does not influence the normal operation of pushing and injecting the liquid medicine. According to the technical scheme, the syringe is characterized by comprising a pintle, a needle cylinder, a push rod and a separation assembly, the two ends of the push rod are connected with a piston and a push seat, the piston and the push rod both move in the needle cylinder, the end, away from the push seat, of the needle cylinder is provided with a guide tube communicated with the interior of the needle cylinder, and the pintle is detachably connected to the guide tube; the separation assembly comprises a control button and a linkage part, the control button is arranged at the push seat, the linkage part is arranged at the push rod, the control button moves to drive the linkage part to release the connection state of the pintle and the guide tube, and the separation assembly further comprises a mistaken touch prevention structure used for preventing random touch of the control button, so that normal operation of injection treatment operation is guaranteed, and the safety of injection treatment is improved. The guarantee degree of life safety of a patient is improved.

Description

Technical Field

[0001] The utility model relates to the medical field, in particular to a syringe with an automatic needle separation structure. Background Art

[0002] Syringe needles are widely used in the medical field. Injecting medication into patients through syringes is a common clinical treatment method. After use, syringes must be separated from the syringe before recycling to avoid injuries to medical staff or medical waste handlers, and to prevent accidental infection from residual bacteria and blood on the needle. This separation involves separating the needle and syringe, placing the needle in a dedicated sharps container or sharps bin, and the syringe in a separate medical waste bin.

[0003] However, in the sharps separation operation for syringes, there are the following problems:

[0004] Currently, there are two main methods: direct separation and separator. Direct separation is a method in which medical staff manually pull out the syringe. During this process, the sharp needle can easily injure the hands, posing a risk of occupational exposure. With the help of a separator, the syringe needle is inserted into the separator. Although there is no direct contact with the needle, hand force is required to pull out the syringe. This operation is not only laborious, but also some residual liquid medicine can easily splash or spill outside at the moment the needle is separated, causing pollution to the external environment. In addition, the hospital consumes a large number of syringes every day. This method will take up a lot of working time of medical staff.

[0005] Therefore, there is a need for a syringe with an automatic needle separation structure that is convenient, safe and efficient. Utility Model Content

[0006] The purpose of the utility model is to provide a syringe with an automatic needle separation structure, which can easily and safely separate the needle plug through the structure provided on the syringe, and can maintain the silent state of the separation structure when injecting the liquid medicine, without affecting the normal operation of injecting the liquid medicine.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] A syringe with an automatic needle separation structure includes a needle bolt, a syringe, a push rod and a separation assembly, wherein the two ends of the push rod are connected to a piston and a push seat, and the piston and the push rod are both movable in the syringe, and the end of the syringe away from the push seat is provided with a guide tube connected to the interior of the syringe, and the needle bolt is detachably connected to the guide tube, and the separation assembly includes a control button and a linkage, wherein the control button is provided at the push seat, and the linkage is provided at the push rod, and the control button moves to drive the linkage to release the connection state between the needle bolt and the guide tube, and also includes an anti-accidental touch structure for preventing the control button from being touched at will.

[0009] Compared with the prior art, the syringe with the automatic needle separation structure using the above technical solution has the following beneficial effects:

[0010] 1. The syringe with an automatic needle separation structure of the present invention can achieve the purpose of separating the needle plug and the guide tube connected to the needle by controlling the movement of the control button at the push rod after the injection of the liquid medicine is completed, that is, the sharp object separation operation of the needle and the syringe is realized, and the guide tube, needle plug and piston structure are used in the same way as the existing syringe structure, and the syringe can meet the normal injection needs of the liquid medicine.

[0011] Second, since the control button for controlling the linkage is located on the push seat, that is, the control button is located at the end of the syringe away from the needle, there is no need to use hands to pull out the needle, which can effectively avoid the risk of accidental punctures and infections when pulling out the needle; in addition, since the force applied is concentrated on the control button and does not need to act on the entire syringe, when concentrated force is applied to separate the needle plug, the problem of residual liquid splashing or contamination caused by pulling out the syringe can be avoided.

[0012] 3. In addition, when injecting the drug solution, the risk of accidental separation of the needle plug can be effectively avoided through the anti-accidental touch structure, thereby ensuring the normal progress of the injection treatment operation and improving the level of protection for the patient's life safety.

[0013] Preferably, the linkage is a push rod that moves within the push rod, and both the piston and the push seat are provided with a slot for the push rod to pass through. The control button is connected to the push rod, and the pintle can be clamped onto the guide tube. When the control button is displaced, the push rod can pass through the guide tube and push the pintle. Unlike existing methods of separating the syringe and needle, the push rod can be driven to unidirectionally separate the pintle with the needle from the syringe. The pintle can be quickly separated by pressing, resulting in a fast and efficient operation without difficulty, making it easy for medical personnel to operate directly.

[0014] Preferably, a slot is defined on the side of the push seat away from the push rod, allowing the control button to move. The anti-accidental touch structure is a cover, which is detachably connected to the slotted surface and is connected to the push seat via an anti-loss sheet. The cover and the slot cooperate to isolate or connect the control button to the outside world, and the slot provides sufficient displacement distance between the control button and the push rod. When injection is completed, the push rod is in a position where pressing the control button can push the pintle.

[0015] Preferably, the side wall of the push seat is provided with a groove for inserting a finger or nail, or the side wall of the cover is provided with an extension piece. The groove or extension piece provides a strong support point for the medical staff to control the opening of the cover, facilitating the medical staff to quickly open the cover, thereby effectively improving the efficiency of sharps separation and syringe recovery.

[0016] Preferably, the separation assembly further comprises a push tube adapted to the guide tube, the piston comprising a positioning portion and a docking portion, the docking portion being locked in the positioning portion and connected to the push rod, the push tube being arranged at an end of the positioning portion away from the push rod, the ejector rod being movable and simultaneously passing through the positioning portion and the docking portion. Upon completion of injection, the push tube passes through the guide tube and contacts the needle bolt, and a certain length of ejector rod can be provided inside so that the end of the ejector rod is flush with the end of the push tube. With the ejector rod in this mating state, separation can be achieved by simply pressing the control button, without having to consider the influence of the guide tube length on the ejector rod's movable distance. Accordingly, the thickness of the ejector seat and the depth of the slotted groove do not need to be considered in light of the guide tube length, further improving the convenience and efficiency of the separation operation.

[0017] Preferably, a movable cavity is provided within the positioning portion, and the movable cavity is located on a side of the docking portion away from the push rod. The outer wall of the push rod is connected to a limiting tube, and the portion of the push rod body facing the guide tube extends from the limiting tube. The limiting tube is movable within the docking portion and the push rod, and the outer diameter of the limiting tube does not exceed the inner diameter of the push tube. By virtue of the larger outer diameter of the limiting tube relative to the push tube, and because the limiting tube and the push rod are connected, the displacement path of the push rod can be restricted while the limiting tube is blocked, thereby avoiding the accident of the push rod pushing the pintle to pop out or fly elsewhere due to excessive force.

[0018] Preferably, an elastic member is connected to the side of the control button facing the ejector rod, so that when the control button is not subjected to external force, the ejector rod does not extend from the push tube. Utilizing the elastic properties of the elastic material, the ejector rod can be maintained in its position when not in separation, and can also be driven to reset the control button and ejector rod when a single press is performed to separate the pintle. That is, if a single separation is incomplete, the ejector rod can be repeatedly pushed to achieve complete separation of the pintle. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic structural diagram of an embodiment of a syringe with an automatic needle separation structure according to the present invention.

[0020] Figure 2 Schematic diagram of the structure of each component in the embodiment in a separated state.

[0021] Figure 3 It is a structural diagram of the embodiment in which the cover is in an open state (without a control button).

[0022] Figure 4 Schematic diagram of the structure of the push rod, the limiting tube and the control button in the embodiment.

[0023] Figure 5 It is a structural diagram of the embodiment in which the cover is in an open state (in use state).

[0024] Figure 6 It is a schematic cross-sectional structural diagram of the use state in the embodiment.

[0025] Figure 7 For example Figure 6 A magnified detail of point A in the middle.

[0026] Figure numerals: 1. needle bolt; 2. syringe; 20. guide tube; 3. push rod; 4. piston; 40. positioning part; 41. docking part; 42. movable chamber; 5. push seat; 50. slot; 51. cover body; 52. anti-loss piece; 53. groove; 6. control button; 7. push rod; 70. limit tube; 8. push tube; 9. elastic part. DETAILED DESCRIPTION

[0027] The present invention will be further described below in conjunction with the accompanying drawings.

[0028] like Figures 1 to 7 The syringe with an automatic needle separation structure shown includes a needle plug 1, a syringe 2, a push rod 3 and a separation assembly.

[0029] The two ends of the push rod 3 are connected to the piston 4 and the push seat 5, and the piston 4 and the push rod 3 are both movable in the syringe 2; the end of the syringe 2 away from the push seat 5 is provided with a guide tube 20 connected to the interior of the syringe 2, and the needle bolt 1 can be detachably connected to the guide tube 20.

[0030] The separation assembly includes a control button 6 and a linkage. The control button 6 is provided at the push seat 5 and the linkage is provided at the push rod 3. The control button 6 moves to drive the linkage to release the connection between the pintle 1 and the guide tube 20.

[0031] Regarding the connection structure between the needle bolt 1 and the guide tube 20, and the specific structure of the corresponding linkage that can achieve separation, the needle bolt 1 can be clamped on the guide tube 20, or the needle bolt 1 can be threadedly connected to the guide tube 20. The corresponding linkage can be used to push the needle bolt 1, and the corresponding connection can also be used to separate the needle bolt 1 by driving the screw.

[0032] In this embodiment, the pintle 1 can be mounted on the guide tube 20. Correspondingly, the linkage is a push rod 7 that moves within the push rod 3. Both the piston 4 and the push seat 5 are provided with slots through which the push rod 7 can pass. The control button 6 is connected to the push rod 7. That is, when the control button 6 is pushed, the push rod 7 can pass through the guide tube 20 and push the pintle 1.

[0033] In order to facilitate faster separation of the needle plug 1, the separation assembly also includes a push tube 8 adapted to the guide tube 20. In this embodiment, the piston 4 is divided into a positioning portion 40 and a docking portion 41. The docking portion 41 is clamped in the positioning portion 40, and the docking portion 41 is connected to the push rod 3. The push tube 8 is provided at one end of the positioning portion 40 away from the push rod 3. The push rod 7 is movable and passes through the positioning portion 40 and the docking portion 41 at the same time. That is, when the injection of the liquid medicine is completed, the push tube 8 can pass through the guide tube 20 and contact the inside of the needle plug 1.

[0034] In addition, when pushing the control button 6 to separate the pintle 1, in order to prevent the push rod 7 from being excessively displaced and causing the pintle 1 to fly a long distance, this embodiment limits the maximum displacement distance of the push rod 7. A movable cavity 42 is provided in the positioning portion 40, and the movable cavity 42 is located on the side of the docking portion 41 away from the push rod 3. The outer wall of the push rod 7 is connected to the limiting tube 70, and the part of the rod body of the push rod 7 facing the guide tube 20 extends from the limiting tube 70. The limiting tube 70 can move in the docking portion 41 and the push rod 3, and the outer diameter of the limiting tube 70 does not exceed the inner diameter of the push tube 8.

[0035] In order to further strengthen the control over the displacement distance of the push rod 7 and prevent the push rod 7 from directly contacting the pintle 1 under normal conditions, an elastic member 9 is connected to the side of the control button 6 facing the push rod 7. In this embodiment, when the control button 6 is not subjected to external force in the assembled state, part of the rod body of the push rod 7 is exactly located in the push tube 8, and the push rod 7 does not extend from the push tube 8.

[0036] It also includes an anti-accidental touch structure for preventing the control button 6 from being touched at will. The anti-accidental touch structure can be in the form of a small-volume control button 6 arranged on the side wall or middle of the push seat 5, or through a structure such as an adjustable snap-in block to limit the movement of the control button 6.

[0037] In this embodiment, the anti-accidental touch structure is an opening and closing structure at the push seat 5 that facilitates the direct use of the control button 6, that is, a slot 50 for the control button 6 to move is provided on the side of the push seat 5 away from the push rod 3, and the anti-accidental touch structure is a cover body 51, which is detachably connected to the surface of the slot 50, and the cover body 51 is connected to the push seat 5 through an anti-loss piece 52.

[0038] Regarding the connection structure of the cover body 51 , the inner side of the cover body 51 can be directly clamped on the notch of the slot 50 , or it can be attached or adsorbed on the notch of the slot 50 . In this embodiment, the cover body 51 can be clamped on the slot 50 .

[0039] To facilitate use by medical staff, the side wall of the push seat 5 is provided with a groove 53 for easy insertion of fingers or nails, or the side wall of the cover body 51 is provided with an extension piece. Both the groove 53 and the extension piece structures can facilitate quick operation by medical staff. In this embodiment, the groove 53 structure is selected.

[0040] The following is how this embodiment is used:

[0041] When not in use, the above-mentioned components are pre-assembled into one. First, according to normal medical operation standards, the push seat 5 can be pulled to draw the prepared liquid medicine into the syringe 2. After the patient's skin is sterilized, puncture and gradually push the push seat 5 to perform normal injection of liquid medicine.

[0042] After the injection is completed, the syringe is moved away from the patient. The medical staff can insert their fingers into the groove 53 of the side wall of the push seat 5 and pry open the cover 51 so that the slot 50 and the control button 6 are exposed to the outside world. Align the needle plug 1 with the sharps box. At this time, the state of the syringe is as follows: Figure 6 and Figure 7 As shown, pressing the control button 6 pushes the limiting tube 70 and the push rod 7 at the same time, part of the rod body of the push rod 7 extends from the push tube 8, and the push rod 7 pushes the needle bolt 1 to separate it from the guide tube 20. At this time, since the outer diameter of the limiting tube 70 does not exceed the inner diameter of the push tube 8, the limiting tube 70 is blocked to prevent the push rod 7 from excessive displacement. At this point, the separation of the needle bolt 1 and the syringe 2 is completed, and the needle bolt 1 automatically falls into the sharps box. Medical staff can hold the syringe 2 and throw it into other medical waste bins.

[0043] The above is a preferred embodiment of the present invention. Those skilled in the art may make several modifications and improvements without departing from the principles of the present invention, and these modifications and improvements should also be considered as within the scope of protection of the present invention.

Claims

1. A syringe with an automatic needle separation structure, characterized in that: The invention comprises a needle bolt (1), a syringe (2) (2), a push rod (3) and a separation component, wherein the two ends of the push rod (3) are connected with a piston (4) and a push seat (5), and the piston (4) and the push rod (3) are both movable in the syringe (2) (2), and the end of the syringe (2) (2) away from the push seat (5) is provided with a guide tube (20) which is connected with the inside of the syringe (2) (2), and the needle bolt (1) is detachably connected to the guide tube (20), and the separation component comprises a control button (6) and a linkage, wherein the control button (6) is arranged at the push seat (5), and the linkage is arranged at the push rod (3), and the control button (6) moves to drive the linkage to release the connection state between the needle bolt (1) and the guide tube (20), and also comprises an anti-mistouch structure for preventing the control button (6) from being touched at will.

2. The syringe with an automatic needle separation structure according to claim 1, characterized in that: The linkage is a push rod (7) movable in the push rod (3), and the piston (4) and the push seat (5) are both provided with a through groove for the push rod (7) to pass through, the control button (6) is connected to the push rod (7), and the pintle (1) can be clamped on the guide tube (20), and when the control button (6) is displaced, the push rod (7) can pass through the guide tube (20) and push the pintle (1).

3. The syringe with an automatic needle separation structure according to claim 2, characterized in that: A slot (50) for the control button (6) to move is provided on a side of the push seat (5) away from the push rod (3); the anti-mistaken touch structure is a cover (51); the cover (51) is detachably connected to the surface of the slot (50), and the cover (51) is connected to the push seat (5) via an anti-loss sheet (52).

4. The syringe with an automatic needle separation structure according to claim 3, characterized in that: The side wall of the push seat (5) is provided with a groove (53) for inserting fingers or nails, or the side wall of the cover body (51) is provided with an extension piece.

5. The syringe with an automatic needle detaching structure according to claim 2, characterized in that: The separation assembly also includes a push tube (8) adapted to the guide tube (20); the piston (4) includes a positioning portion (40) and a docking portion (41); the docking portion (41) is clamped in the positioning portion (40), and the docking portion (41) is connected to the push rod (3); the push tube (8) is arranged at one end of the positioning portion (40) away from the push rod (3); and the push rod (7) is movable and passes through the positioning portion (40) and the docking portion (41) at the same time.

6. The syringe with an automatic needle detaching structure according to claim 5, characterized in that: The positioning portion (40) is provided with an active cavity (42), and the active cavity (42) is located on a side of the docking portion (41) away from the push rod (3); the outer wall of the push rod (7) is connected to a limiting tube (70), and a portion of the rod body of the push rod (7) facing the guide tube (20) extends out of the limiting tube (70); the limiting tube (70) is movable in the docking portion (41) and the push rod (3); and the outer diameter of the limiting tube (70) does not exceed the inner diameter of the push tube (8).

7. The syringe with an automatic needle detachment structure according to claim 6, characterized in that: The side of the control button (6) facing the push rod (7) is connected with an elastic member (9), and when the control button (6) is not subjected to external force, the push rod (7) does not extend out of the push tube (8).

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