CN119326991A

CN119326991A - Automatic retractable syringe

Info

Publication number: CN119326991A
Application number: CN202411470627.3A
Authority: CN
Inventors: 王高麒
Original assignee: Guangdong Intmed Medical Appliance Co ltd
Current assignee: Guangdong Intmed Medical Appliance Co ltd
Priority date: 2024-10-21
Filing date: 2024-10-21
Publication date: 2025-01-21

Abstract

The invention discloses an automatic retraction type injector, which relates to the technical field of injectors and aims to provide an automatic retraction type injector capable of automatically retracting a needle point after the injector is used and avoiding the needle point from damaging human bodies, and the automatic retraction type injector is technically characterized by comprising an empty cylinder, a piston handle and a piston block, wherein the end surface of the empty cylinder is in threaded connection with a needle bolt, the outer side of the needle bolt is sleeved with a protective sleeve, the inner side of the needle bolt is in sliding fit with a needle stem, one end of the needle stem positioned in the needle bolt is connected with a passive triggering component, the technical effect is that through setting up initiative trigger part, passive trigger part and spring, push the piston handle to empty section of thick bamboo bottom for initiative trigger part and passive trigger part joint in the piston handle then continue to push down the piston handle, make initiative trigger part cross the bulge loop, then upwards pop up initiative trigger part under the elasticity effect of spring, in stretching out the needle stalk into the piston handle, avoid the needle stalk to expose the problem that has the injury people risk.

Description

Automatic retraction type injector

Technical Field

The invention relates to the technical field of syringes, in particular to an automatic retraction type syringe.

Background

The syringe is a common medical device, which consists of a syringe with a small hole at the front end and a piston core rod matched with the syringe, the syringe is used for injecting a small amount of liquid or gas into areas inaccessible to other methods or extracting the liquid from the areas, the process of extracting or injecting the gas or the liquid by using the syringe and a needle is called injection, the syringe is disposable, in order to protect the personal health of a patient, the needle of the syringe is very sharp, if the needle is improperly treated, the risk of stabbing and infection is easily caused, the needle tip is manually pulled out after the syringe is used, the process has a great risk, and the stabbing problem is easily caused.

Disclosure of Invention

(One) solving the technical problems

Aiming at the defects of the prior art, the invention provides an automatic retraction type injector which can automatically retract the needle point after the use is finished and avoid the harm of the needle point to human body.

(II) technical scheme

The automatic retraction type injector comprises an empty cylinder, a piston handle and a piston block, wherein the end face of the empty cylinder is in threaded connection with a pintle, the outer side of the pintle is sleeved with a protective sleeve, the inner side of the pintle is in sliding fit with a needle stem, one end of the needle stem, which is positioned in the pintle, is connected with a passive trigger component, one end of the piston handle, which is positioned in the empty cylinder, is clamped with a connecting handle, the other end of the connecting handle is clamped with the piston block, the piston block is attached to the inner wall of the empty cylinder, an active trigger component is arranged in the piston handle, a spring is arranged on the outer side of the active trigger component, the spring applies thrust to the active trigger component, the active trigger component is used for connecting the passive trigger component, a convex ring which is clamped with the active trigger component is also arranged in the piston handle, and the top end of the piston handle is clamped with a handle cover.

Preferably, the passive triggering component comprises a connecting rod, the connecting rod is connected with the needle stem and is in hollow arrangement, a hanging point which is clamped with the active triggering component is arranged at the top end of the connecting rod, the size of the connecting rod is smaller than that of the hanging point, and the size of the hanging point is smaller than that of an inner hole of the active triggering component.

Preferably, the initiative trigger part includes the trigger lever, trigger lever sliding fit is in the piston handle, and inside for hollow setting, the top of trigger lever is equipped with the top circle of laminating with the bulge loop, and the bottom is equipped with the hanging ring with hanging point joint.

Preferably, the piston handle comprises an upper handle body and a lower handle body, the lower handle body is connected with the connecting handle and the active triggering component in a matched mode, a breaking point capable of breaking off is arranged between the upper handle body and the lower handle body, a fixing component capable of being clamped with the passive triggering component is arranged at the top end of the inner portion of the upper handle body, and a handle cover is inserted at the top end of the upper handle body.

Preferably, the fixing component comprises a boss arranged in the upper handle body, a plurality of clamping strips inclining upwards are arranged on the boss, the clamping strips are elastic, and a clamping block for fixing the positions of the clamping strips is arranged in the upper handle body.

Preferably, an ejector component is arranged in the handle cover and used for pushing the passive triggering component to be separated from the fixed component, the ejector component comprises an ejector rod, the ejector rod is in sliding fit with the handle cover, and a pressing sheet in sliding fit with the handle cover is arranged under the ejector rod.

Preferably, a rubber ring is arranged between the pintle and the passive triggering component, a rubber tube is arranged below the rubber ring, and the rubber tube is attached between the passive triggering component and the inner wall of the pintle.

Preferably, a weak seal is provided under the piston block in alignment with the active trigger member, the weak seal being adapted to prevent ingress of liquid medicament into the piston stem.

(III) beneficial effects

Compared with the prior art, the invention provides an automatic retraction type injector, which has the following beneficial effects:

1. Through setting up initiative trigger part, passive trigger part and spring, initiative trigger part is restricted by bulge loop in the piston handle under the normality for initiative trigger drives the spring and is in potential energy compression state, after the syringe uses to accomplish, push away the piston handle to empty barrel bottom, make initiative trigger part and passive trigger part joint in the piston handle, then continue to push down the piston handle, make initiative trigger part receive upward reaction force, make initiative trigger part cross the bulge loop, lose fixed effect, then upwards bounce initiative trigger part under the elasticity effect of spring, and initiative trigger part then through the joint with passive trigger part, in with the tensile income piston handle of needle stalk, in time with needle stalk shrink after the realization use is accomplished, avoid the needle stalk to expose the problem that has the injury people risk.

2. By arranging the fixing part and the ejection part, the fixing part is arranged in the upper handle body, when the active triggering part pulls the passive triggering part upwards under the action force of the spring, the passive triggering part can be subjected to the same pulling force, so that the passive triggering part is sprung upwards and extrudes the fixing part, the fixing part is fixed at the end part of the upper handle body, and the passive triggering part and the needle stem can be prevented from sliding randomly;

When the injector is collected and processed, the metal needle peduncles are required to be separated from the main body of the injector, the upper handle body and the lower handle body can be broken by utilizing the connection mode of breaking points, the broken upper handle body is connected with the passive triggering component and the needle peduncles through the fixing component, the needle peduncles can be taken out without contacting the needle peduncles, then the passive triggering component and the needle peduncles are ejected by the ejection component, so that the needle peduncles fall into a special recovery device, and the needle peduncles are independently taken out when the classification processing is convenient, and the needle peduncles do not need to be contacted with the needle peduncles.

Drawings

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a schematic illustration of a cross-section of the present invention;

FIG. 3 is a schematic illustration of a cross-section of a piston stem of the present invention;

FIG. 4 is a schematic diagram of a cross-section of an active triggering element according to the present invention;

FIG. 5 is a schematic view of a passive triggering element according to the present invention

FIG. 6 is a schematic illustration of a cross-section of an ejection assembly of the present invention;

FIG. 7 is an enlarged schematic view of FIG. 2A in accordance with the present invention;

fig. 8 is an enlarged schematic view of the invention at B in fig. 2.

In the figure, 1, a hollow cylinder; 2, a piston handle, 201, an upper handle body, 202, a lower handle body, 203, a breaking point, 204, a fixing part, 2041, a clamping strip, 2042, a boss, 2043, a clamping block, 205, a handle cover, 3, a protective sleeve, 4, an ejection part, 401, a push rod, 402, a pressing sheet, 5, an active triggering part, 501, a triggering rod, 502, a top ring, 503, a hanging ring, 6, a spring, 7, a passive triggering part, 701, a connecting rod, 702, a hanging point, 8, a pintle, 9, a piston block, 10, a connecting handle, 11, a needle stem, 12, a rubber ring, 13, a rubber tube, 14, a convex ring, 15 and a weak sealing gasket.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Example 1

Referring to fig. 1-8, an automatic retraction type injector comprises a hollow cylinder 1, a piston handle 2 and a piston block 9, wherein a needle bolt 8 is connected to the end surface of the hollow cylinder 1 in a threaded manner, a protective sleeve 3 is sleeved on the outer side of the needle bolt 8, a needle stem 11 is slidingly matched with the inner side of the needle bolt 8, one end of the needle stem 11 positioned in the needle bolt 8 is connected with a passive trigger part 7, one end of the piston handle 2 positioned in the hollow cylinder 1 is clamped with a connecting handle 10, the other end of the connecting handle 10 is clamped with the piston block 9, the piston block 9 is attached to the inner wall of the hollow cylinder 1, an active trigger part 5 is arranged in the piston handle 2, a spring 6 is arranged on the outer side of the active trigger part 5, the spring 6 applies thrust to the active trigger part 5, the active trigger part 5 is used for connecting the passive trigger part 7, and a convex ring 14 for clamping the active trigger part 5 is also arranged in the piston handle 2;

According to the invention, the active trigger part 5, the passive trigger part 7 and the spring 6 are arranged, the convex ring 14 in the piston handle 2 in the active trigger part 5 is limited under the normal state, so that the active trigger drives the spring 6 to be in a potential energy compression state, after the use of the injector is completed, the piston handle 2 is pushed to the bottom of the hollow cylinder 1, the active trigger part 5 in the piston handle 2 is clamped with the passive trigger part 7, then the piston handle 2 is pushed downwards continuously, the active trigger part 5 is subjected to upward reaction force, the active trigger part 5 passes over the convex ring 14, the fixing effect is lost, then the active trigger part 5 is sprung upwards under the elastic force of the spring 6, and the active trigger part 5 stretches the needle stem 11 into the piston handle 2 through the clamping with the passive trigger part 7, so that the needle stem 11 is contracted in time after the use is completed, and the problem that the needle stem 11 is exposed to hurt people is avoided.

The passive triggering component 7 comprises a connecting rod 701, the connecting rod 701 is connected with a needle stem 11 and is in hollow arrangement, a hanging point 702 which is clamped with the active triggering component 5 is arranged at the top end of the connecting rod 701, the size of the connecting rod 701 is smaller than that of the hanging point 702, the size of the hanging point 702 is smaller than that of an inner hole of the active triggering component 5, the active triggering component 5 comprises a triggering rod 501, the triggering rod 501 is slidably matched in a piston handle 2 and is in hollow arrangement, a top ring 502 which is attached to a convex ring 14 is arranged at the top of the triggering rod 501, and a hanging ring 503 which is clamped with the hanging point 702 is arranged at the bottom of the triggering rod 501;

When the piston handle 2 is continuously pushed downwards, the top of the trigger rod 501 in the piston handle 2 is abutted against the convex ring 14 by the aid of the top ring 502 and drives the hanging ring 503 at the bottom to move downwards, the hanging ring 503 downwardly extrudes the hanging point 702 at the top end of the connecting rod 701 and is clamped with the hanging point, then under the continuous downward pressing acting force, the trigger rod 501 is subjected to upward reaction force, the top ring 502 at the top end of the trigger rod passes through the convex ring 14 under extrusion, at the moment, the trigger rod 501 is fixed at the top end of the spring 6 and bounces up, and the hanging ring 503 at the bottom end drives the hanging point 702 and the connecting rod 701 to pull the needle stalk 11 into the piston handle 2, so that the aim of shrinking the needle stalk 11 is fulfilled.

Example 2

Referring to fig. 3, 5, 6, 7 and 8, the specific piston handle 2 includes an upper handle body 201 and a lower handle body 202, the lower handle body 202 is connected with the connecting handle 10 and the active triggering component 5 in a matching manner, a breaking point 203 which can be broken off is arranged between the upper handle body 201 and the lower handle body 202, a fixing component 204 which can be clamped with the passive triggering component 7 is arranged at the top end of the inner part of the upper handle body 201, and a handle cover 205 is inserted at the top end of the upper handle body 201;

in the invention, by using the fixing component 204, the fixing component 204 is arranged in the upper handle 201, when the active triggering component 5 pulls the passive triggering component 7 upwards under the action of the spring 6, the passive triggering component 7 can be subjected to the same pulling force, so that the passive triggering component 7 is sprung upwards and the fixing component 204 is extruded, and the fixing component 204 is fixed at the end part of the upper handle 201, so that the passive triggering component 7 and the needle stalk 11 can be prevented from sliding randomly.

The fixing component 204 comprises a boss 2042 arranged in the upper handle body 201, a plurality of clamping strips 2041 inclining upwards are arranged on the boss 2042, the clamping strips 2041 have elasticity, and a clamping block 2043 for fixing the clamping strips 2041 is arranged in the upper handle body 201;

Through setting up card strip 2041 and fixture block 2043, when the equipment, put into card strip 2041 in the upper handle body 201 earlier, then inwards press for card strip 2041 laminating is on boss 2042, and by fixture block 2043 restriction, utilize this kind of mode, can separate injection moulding with card strip 2041 and piston handle 2, reduce the degree of difficulty of die sinking cost and drawing of patterns, and when initiative trigger part 5 drives needle stalk 11 through passive trigger part 7 and bounce, initiative trigger part 5 is blocked by card strip 2041, and hanging point 702 in the passive trigger part 7 can squeeze out card strip 2041, then block on card strip 2041, realize fixing effect with needle stalk 11, prevent its random rocking.

An ejector component 4 is arranged in the handle cover 205, the ejector component 4 is used for pushing the passive triggering component 7 to be separated from the fixed component 204, the ejector component 4 comprises an ejector rod 401, the ejector rod 401 is in sliding fit with the handle cover 205, and a pressing sheet 402 which is in sliding fit with the handle cover 205 is arranged below the ejector rod 401;

When the injector is collected and processed, the metal needle stalk 11 is required to be separated from the main body of the injector, the upper handle body 201 and the lower handle body 202 can be broken by utilizing the connection mode of the breaking point 203, the broken upper handle body 201 is connected with the passive triggering component 7 and the needle stalk 11 through the fixing component 204, the passive triggering component 7 and the needle stalk 11 can be taken out under the condition that the needle stalk 11 is not contacted, and then the passive triggering component 7 and the needle stalk 11 are ejected by the ejection component 4 so as to fall into a special recovery device, so that the needle stalk 11 is independently taken out when the classification processing is convenient, and the needle stalk 11 is not required to be contacted with the needle stalk;

in a normal state, when the ejector rod 401 is retracted into the handle cover 205 and the passive triggering component 7 needs to be separated from the needle stem 11 through the ejection component 4, the ejector rod 401 can be pushed by a tool to push the passive triggering component 7 to be separated from the fixing component 204, so that the purpose of collecting the needle stem 11 without contacting the needle stem is achieved.

A rubber ring 12 is arranged between the pintle 8 and the passive triggering part 7, a rubber tube 13 is arranged below the rubber ring 12, and the rubber tube 13 is attached between the passive triggering part 7 and the inner wall of the pintle 8;

Can seal between pintle 8 and passive triggering part 7 through setting up rubber circle 12 for both have reliable sealed effect, prevent the problem of weeping, when passive triggering is pulled the shrink in to piston handle 2, passive triggering part 7 can utilize frictional force inwards rolling with the rubber tube 13 of laminating with it, makes rubber tube 13 turn over into in the pintle 8, utilizes the mode of turning over to reduce the problem of remaining liquid medicine outflow in the syringe.

A weak sealing gasket 15 is arranged at the position aligned with the active triggering part 5 below the piston block 9, and the weak sealing gasket 15 is used for preventing the liquid medicine from entering the piston handle 2;

Through setting up weak sealed pad 15, weak sealed pad 15 is in the state of sealing the central hole of piston piece 9 under the normal state, makes it can be smooth inhale and release the liquid medicine, prevents that the liquid medicine from entering into in the piston handle 2, and when initiative trigger part 5 and passive trigger part 7 butt joint, can be with weak sealed pad 15 broken for the passageway that needle stalk 11 was retracted is opened.

Working principle:

When the needle stem 11 is required to retract, the piston handle 2 is continuously pushed into the hollow cylinder 1, so that the trigger rod 501 in the piston handle 2 is clamped with the hanging point 702 through the hanging ring 503 at the bottom, then is continuously pushed, the top ring 502 at the top end of the trigger rod 501 is separated from the convex ring 14, then the spring 6 releases the elastic force of the spring to upwards spring the trigger rod 501, the trigger rod 501 drives the connecting rod 701 to upwards spring the needle stem 11, the needle stem 11 is retracted into the piston handle 2, and the connecting rod 701 and the needle stem 11 are clamped with the clamping strip 2041 by utilizing the hanging point 702 under the pushing of the elastic force, so that the connecting rod 701 and the needle stem 11 are fixed;

When the needle stalk 11 needs to be separated, the upper handle body 201 and the lower handle body 202 are broken off, the upper handle body 201 takes out the connecting rod 701 and the needle stalk 11 by using the inner clamping strip 2041, then the needle stalk 11 is placed in the collecting device, and meanwhile, the push rod 401 is pushed downwards by using a tool, so that the push rod 401 pushes the connecting rod 701 and the hanging point 702 to be separated from the clamping strip 2041, and the needle stalk 11 falls into the collecting device.

The above is only a specific embodiment of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent substitutions or modifications and the like made on the basis of the present invention to solve the substantially same technical problems and achieve the substantially same technical effects are included in the scope of the present invention.

Claims

1. An automatic retractable syringe, comprising an empty barrel (1), a piston handle (2), and a piston block (9), characterized in that: the end surface of the empty barrel (1) is threadedly connected to a needle plug (8), the outer side of the needle plug (8) is provided with a protective sleeve (3), and the inner side is slidably fitted with a needle stem (11), one end of the needle stem (11) located in the needle plug (8) is connected to a passive trigger component (7), one end of the piston handle (2) located in the empty barrel (1) is clamped with a connecting handle (10), and the other end of the connecting handle (10) is connected to the active The piston block (9) is engaged, the piston block (9) is in contact with the inner wall of the hollow cylinder (1), an active trigger component (5) is provided inside the piston handle (2), a spring (6) is provided on the outer side of the active trigger component (5), the spring (6) applies thrust to the active trigger component (5), the active trigger component (5) is used to connect the passive trigger component (7), a convex ring (14) for engaging the active trigger component (5) is also provided inside the piston handle (2), and a handle cover (205) is engaged at the top end of the piston handle (2).

2. An automatic retractable syringe according to claim 1, characterized in that: the passive trigger component (7) includes a connecting rod (701), the connecting rod (701) is connected to the needle stem (11) and is hollow, the top of the connecting rod (701) is provided with a hanging point (702) that is engaged with the active trigger component (5), the size of the connecting rod (701) is smaller than the hanging point (702), and the size of the hanging point (702) is smaller than the inner hole of the active trigger component (5).

3. An automatic retractable syringe according to claim 2, characterized in that: the active trigger component (5) includes a trigger rod (501), the trigger rod (501) is slidably fitted in the piston handle (2), and the interior is hollow, the top of the trigger rod (501) is provided with a top ring (502) that fits with the convex ring (14), and the bottom is provided with a hanging ring (503) that is clamped with the hanging point (702).

4. An automatic retractable syringe according to claim 1, characterized in that: the piston handle (2) includes an upper handle body (201) and a lower handle body (202), the lower handle body (202) is cooperatively connected with the connecting handle (10) and the active trigger component (5), a break point (203) that can be broken off is provided between the upper handle body (201) and the lower handle body (202), the top end of the upper handle body (201) is provided with a fixing component (204) that can be clamped with the passive trigger component (7), and the top end of the upper handle body (201) is plugged with a handle cover (205).

5. An automatic retractable syringe according to claim 4, characterized in that: the fixing component (204) includes a boss (2042) opened in the upper handle body (201), and a plurality of upwardly inclined clamping strips (2041) are provided on the boss (2042), and the clamping strips (2041) are elastic, and a clamping block (2043) for fixing the position of the clamping strips (2041) is opened inside the upper handle body (201).

6. An automatic retractable syringe according to claim 1, characterized in that: an ejection component (4) is provided in the handle cover (205), and the ejection component (4) is used to push the passive trigger component (7) to separate from the fixed component (204), and the ejection component (4) includes a push rod (401), and the push rod (401) is slidably matched with the handle cover (205), and a pressing piece (402) is provided under the push rod (401) and is slidably matched with the handle cover (205).

7. An automatic retractable syringe according to claim 1, characterized in that a rubber ring (12) is provided between the needle plug (8) and the passive trigger component (7), a rubber tube (13) is provided under the rubber ring (12), and the rubber tube (13) is fitted between the passive trigger component (7) and the inner wall of the needle plug (8).

8. An automatic retractable syringe according to claim 1, characterized in that a weak sealing gasket (15) is provided under the piston block (9) at a position aligned with the active trigger component (5), and the weak sealing gasket (15) is used to prevent the drug solution from entering the piston handle (2).