Syringe protection device and safety syringe

Abstract

A syringe protection device and a safety syringe. The syringe at least comprises a barrel (300). The protection device at least comprises a protection sleeve (100) and an elastic member (200). Limiting members (110) are provided at one end of the protection sleeve (100), and a through hole (120) is formed at the other end. In a first state, the barrel (300) is pressed in the protection sleeve (100), the end of the barrel (300) distant from a needle (350) is clamped in the limiting members (110), and the needle (350) passes through the through hole (120) and is exposed outside the protection sleeve (100). In a second state, the end of the barrel (300) distant from the needle (350) is distant from the limiting members (110), and the needle (350) is coated inside the protection sleeve (100). According to the syringe protection device, when the syringe is used and a push rod (400) of the syringe is pressed to the bottom, pressure is applied to the limiting members (110), so that the barrel (300) is released from the limiting members (110) under the push force of the elastic member (200), and the needle (350) enters the protection sleeve (100) through the through hole (120), thereby solving the problem of secondary damage to a person after injection of the syringe is completed. Additionally, the structure is simple, reducing the use amount of manufacturing materials, better achieving environmental protection and saving costs.

Description

Syringe protection device and safety syringe Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to a syringe protection device and a safety syringe. Background Art

[0002] Disposable syringes are currently the most commonly used medical devices. To prevent the needle from accidentally injuring the user, causing drug contamination, or the syringe from being reused, it is generally required that the needle be collected and recycled after the injection is completed. However, with the further tightening of medical device management, some institutions have required the installation of special protective devices on disposable syringes. After the injection is completed, the protective device is activated to protect the needle part, preventing accidental injury from the needle and preventing the needle from separating from the syringe body, thereby improving the safety of disposable syringes.

[0003] However, the related syringe protection devices in the existing technology are limited by the properties of the molding materials and the protection requirements. Most of them have problems such as large overall size, complex structure, large shell and spring materials, low environmental protection, high production cost, and inconvenient operation.

[0004] Therefore, it is urgent to propose a new syringe protection device to solve the above problems.

[0005] Summary of the Invention

[0006] In order to solve one or more of the above-mentioned technical problems existing in the prior art, the embodiments of the present application provide a new syringe protection device and a safety syringe to solve the problems of complex structure, inconvenient operation, high manufacturing cost, etc. existing in the syringe protection device in the prior art.

[0007] In order to achieve the above objectives, the technical solutions adopted by this application to solve the technical problems are:

[0008] In a first aspect, the present application provides a syringe protection device, wherein the syringe comprises at least a syringe barrel and a push rod that cooperate with each other, and the device comprises at least a protective sleeve and an elastic member;

[0009] The protective sleeve is arranged on the outside of the syringe, and a limiting member is provided at one end of the protective sleeve, and a through hole is opened at the other end;

[0010] The elastic member is sleeved on the syringe, and the syringe is press-fitted into the protective sleeve after the elastic member is sleeved on the syringe;

[0011] In the first state, the syringe is pressed into the protective sleeve, the end of the syringe away from the needle is clamped in the limiting member, and the needle passes through the through hole and is exposed outside the protective sleeve;

[0012] In the second state, the end of the syringe away from the needle is away from the limiting member, and the needle is covered inside the protective sleeve.

[0013] It can be understood that the protective sleeve is a hollow structure, and the internal accommodating space of the protective sleeve is used to accommodate the syringe and / or needle.

[0014] Preferably, the protective cover is a hollow cylinder.

[0015] In a specific embodiment, a limiting protrusion is provided on the outer wall of the syringe, and a limiting groove is provided on the side wall of the protective sleeve, and the limiting protrusion can move along the limiting groove.

[0016] In a specific embodiment, the limiting groove includes a groove body and a first limiting point and a second limiting point located at different positions of the groove body;

[0017] The limiting protrusion can reach the first limiting point or the second limiting point along the groove body;

[0018] When the syringe is not in use, the limiting protrusion is located at the first limiting point. When the syringe is in use, the limiting protrusion is located at the second limiting point.

[0019] In a specific embodiment, the groove body comprises at least a first portion and a second portion that are interconnected, the first portion is arranged along the circumference of the protective sleeve, and the second portion is arranged along the axial direction of the protective sleeve;

[0020] The first limiting point is located at one end of the second part close to the through hole, and the second limiting point is located at the connection between the first part and the second part.

[0021] In a specific embodiment, the protective cover further includes a stopper, and the stopper is formed to extend along an edge of the first portion close to the limiting member in a direction away from the edge.

[0022] In a specific embodiment, a passage groove is provided on the inner wall of one end of the protective cover close to the limiting member, one end of the passage groove is connected to the first part of the limiting groove, and the limiting protrusion can enter the limiting groove along the passage groove.

[0023] In a specific embodiment, the number of the limiting protrusions, the limiting grooves, and the passing grooves is two, and each of the limiting protrusions is used in conjunction with one of the limiting grooves and one of the passing grooves.

[0024] In a specific embodiment, the two limiting protrusions are symmetrically arranged on the outer wall of the syringe, the two limiting grooves are symmetrically arranged on the side wall of the protective sleeve, and the two passing grooves are symmetrically arranged on the inner wall of the protective sleeve at one end close to the limiting member.

[0025] In a specific embodiment, the syringe includes a first end and a second end that are oppositely disposed, the first end is provided with a first flange extending radially outward from the syringe, and the second end is provided with the needle;

[0026] The limiting member includes a connecting member connected to the protective sleeve and a second flange formed at an end of the connecting member away from the protective sleeve and extending radially inwardly from the protective sleeve;

[0027] When the syringe is not in use, the second flange abuts against the first flange to press the syringe into the protective sleeve.

[0028] In a specific embodiment, the limiting members include at least two, and the at least two limiting members are arranged opposite to each other or spaced apart at one end of the protective sleeve.

[0029] In a specific embodiment, the limiting member is made of elastic material.

[0030] In a specific embodiment, the elastic member includes a spring.

[0031] In a specific embodiment, at least one weight-reducing groove is further provided on the side wall of the protective cover.

[0032] In a second aspect, corresponding to the above-mentioned syringe protection device, the present application further provides a safety syringe, comprising a syringe and a push rod that cooperate with each other, and also comprising the above-mentioned syringe protection device, wherein the protection device comprises at least a protective sleeve and an elastic member, wherein one end of the protective sleeve is provided with a limit member, and the other end is provided with a through hole;

[0033] In the first state, the syringe is pressed into the protective sleeve, the end of the syringe away from the needle is clamped in the limiting member, and the needle passes through the through hole and is exposed outside the protective sleeve;

[0034] In the second state, the end of the syringe away from the needle is away from the limiting member, and the needle is covered inside the protective sleeve.

[0035] In a specific embodiment, a limiting protrusion is provided on the outer wall of the syringe, and a limiting groove is provided on the side wall of the protective sleeve, and the limiting protrusion can move along the limiting groove.

[0036] In a specific embodiment, the limiting protrusion is integrally formed with the outer wall of the syringe or the limiting protrusion is connected to the outer wall of the syringe.

[0037] In a specific embodiment, the limiting protrusion is arranged on the outer wall of the syringe near one end of the through hole.

[0038] The beneficial effects of the technical solution provided by the embodiments of the present application are:

[0039] The syringe protection device and safety syringe provided in the embodiment of the present application include at least a syringe, and the device includes at least a protective sleeve and an elastic member; the protective sleeve is mounted on the outer side of the syringe, with a limit member provided at one end and a through hole at the other end; the elastic member is mounted on the syringe, and the syringe is press-fitted into the protective sleeve after being mounted on the elastic member; in a first state, the syringe is press-fitted into the protective sleeve, with the end of the syringe away from the needle retained in the limit member, and the needle is exposed outside the protective sleeve through the through hole; in a second state, the end of the syringe away from the needle is away from the limit member, and the needle is enclosed within the protective sleeve. The syringe protection device provided in the present application, when the syringe is used, applies pressure to the limit member when the syringe plunger is pressed to the bottom, so that the syringe is released from the limit member under the thrust of the elastic member, and the needle enters the protective sleeve through the through hole, thereby solving the problem of secondary injury to the person after the syringe injection is completed. The device has a simple structure, reduces the amount of preparation materials, is more environmentally friendly, and saves costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0041] FIG1 is an exploded view of a syringe protection device provided in an embodiment of the present application;

[0042] FIG2 is a schematic structural diagram of a syringe protection device provided by an embodiment of the present application and a syringe in an unused state after the syringe is assembled;

[0043] FIG3 is a schematic structural diagram of a syringe protection device provided by an embodiment of the present application, wherein the syringe is assembled with the syringe and the syringe is in use;

[0044] FIG4 is a schematic structural diagram of a protective cover of a syringe protection device provided in an embodiment of the present application;

[0045] FIG5 is an exploded view of the safety syringe provided in an embodiment of the present application. DETAILED DESCRIPTION

[0046] To make the purpose, technical solutions, and advantages of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0047] As described in the background art, existing integrated syringe protection devices are limited by the properties of molding materials and protection requirements, and most of them have problems such as large overall size, complex structure, large shell and spring materials, low environmental protection, high production cost, and inconvenient operation.

[0048] In order to solve one or more of the above problems, the embodiment of the present application creatively proposes a new syringe protection device. When in use, the device is mounted on the outside of the syringe and is configured to apply pressure to the limit member through the push rod or other means when the syringe is in use and the push rod of the syringe is pressed to the bottom, so that the syringe is released from the limit member under the thrust of the elastic member, and the needle enters the inside of the protective cover through the through hole, thereby solving the problem of secondary injury to people after the injection of the syringe is completed. The syringe protection device provided by the present application has a simple structure, reduces the amount of preparation materials, is more environmentally friendly and saves costs.

[0049] The present embodiments do not specify the specific materials and preparation processes for the syringe protection device and safety syringe. Any known materials may be used in the present embodiments without violating the inventive concept of the present invention. As an illustrative, non-limiting illustration, the syringe protection device and safety syringe disclosed in the present embodiments can be prepared using 3D printing technology using a suitable polymer material. The specific preparation process is outside the scope of this application and will not be detailed here.

[0050] The following describes the embodiments of the present application in detail with reference to the accompanying drawings.

[0051] Example 1

[0052] The syringe protection device provided in the present application is sleeved on the outside of the syringe. The syringe protection device can wrap the needle after the syringe is used to prevent secondary damage to people. Referring to Figures 1 to 4, the syringe protection device generally includes a protective sleeve 100 and an elastic member 200, etc. The syringe used in conjunction with the syringe protection device includes at least a syringe 300 and a push rod 400 that cooperate with each other. Preferably, the elastic member 200 is a spring. Among them, the protective sleeve 100 is used to be sleeved on the outside of the syringe 300. A limiting member 110 is provided at one end of the protective sleeve 100, and a through hole 120 is opened at the other end. The elastic member 200 is sleeved on the syringe 300, and the syringe 300 is pressed into the protective sleeve after being sleeved with the elastic member 200.

[0053] It can be understood that, as a preferred implementation, in the embodiment of the present application, the limiting member 110 and the protective cover 100 are integrally formed.

[0054] As an optional implementation, the limiting member 110 is an independent component, which is assembled on the protective cover 100 .

[0055] 2 and 3 , in the first state, the syringe 300 is press-fitted into the protective sleeve 100, with the end of the syringe 300 away from the needle stuck in the stopper 110. The needle passes through the through hole 120 and is exposed to the outside of the protective sleeve 100 for subsequent injection. In the second state, after the push rod 400 applies pressure to the stopper 110, the syringe 300 is released from the stopper 110 under the thrust of the elastic member 200, and the needle enters the interior of the protective sleeve 100 through the through hole 120 to prevent the needle from causing secondary damage to the user. The first state includes but is not limited to the syringe unused state, and the second state includes but is not limited to the syringe used state.

[0056] It should be noted that in the embodiments of the present application, the shape of the protective cover 100 is not specifically limited. As an illustrative, non-restrictive example, the protective cover 100 is a hollow structure, preferably a hollow cylinder. It is understood that the protective cover 100 has a storage space formed therein for accommodating a syringe and / or a needle.

[0057] It should be noted here that in the embodiment of the present application, when the syringe is in use, the needle completely enters the interior of the protective sleeve through the through hole, thereby avoiding secondary injury to the person.

[0058] Referring to Figures 1 and 4, as a preferred embodiment, in the embodiment of the present application, a limiting groove 130 is further provided on the side wall of the protective sleeve 100. Correspondingly, a limiting protrusion 310 is provided on the outer wall of the syringe 300. Preferably, the limiting protrusion 310 is provided on the outer wall of the syringe 300 near one end of the through hole 120, and the limiting protrusion 310 can move along the limiting groove 130. The size of the limiting protrusion 310 is adapted to the size of the limiting groove 130. Preferably, the size of the limiting protrusion 310 is slightly smaller than the size of the limiting groove 130 in a direction perpendicular to the moving direction of the limiting protrusion 310. It should be noted that in the embodiment of the present application, there is no specific restriction on the shape of the limiting protrusion 310. Without violating the inventive concept of the present application, any known shape can be used as the shape of the limiting protrusion of the present application. As an exemplary and non-restrictive explanation, the limiting protrusion in the implementation of the present application is circular or cylindrical.

[0059] As an optional implementation, in the embodiment of the present application, the limiting protrusion is integrally formed with the outer wall of the syringe.

[0060] As another optional embodiment, in the embodiment of the present application, the limiting protrusion is connected to the outer wall of the syringe, wherein the present application does not limit the specific connection method between the limiting protrusion and the outer wall of the syringe. As an example, the limiting protrusion and the outer wall of the syringe can be connected by pasting, gluing, etc.

[0061] 4 , the limiting groove 130 includes a groove body 131 and a first limiting point 132 and a second limiting point 133 located at different positions of the groove body 131. The limiting protrusion 310 can move in the groove body 131 and can move along the groove body 131 to the first limiting point 132 or the second limiting point 133. The groove body 131 is formed on and passes through the side wall of the protective cover 100. Preferably, the groove body 131 is a long hole passing through the side wall of the protective cover 100. In a first state (e.g., when the syringe is not in use), the syringe 300 is press-fitted into the protective cover 100, and the end of the syringe 300 away from the needle is clamped in the limiting member 110. The needle passes through the through hole 120 and is exposed to the outside of the protective cover 100. At this time, the limiting protrusion 310 is located at the first limiting point 132 in the limiting groove 130. In the second state (such as the state after the syringe is used), after the push rod 400 applies pressure to the limit member 110, the syringe 300 is released from the limit member 110 under the thrust of the elastic member 200, and the needle enters the interior of the protective cover 100 through the through hole 120. At this time, the limit protrusion 310 is located at the second limit point 133 in the limit groove 130.

[0062] As further shown in Figure 4, the groove body 131 includes a first portion 134 and a second portion 135 that are arranged at an angle to each other. Preferably, the first portion 134 and the second portion 135 are arranged perpendicular to each other. The first portion 134 and the second portion 135 are connected to each other, and the limiting protrusion 310 can move from the first portion 134 to the second portion 135 along the groove body 131, and can also move from the second portion 135 to the first portion 134 along the groove body 131. In a specific implementation, the first portion 134 is arranged along the circumference of the protective cover 100, and the second portion 135 is arranged along the axial direction of the protective cover 100. It is assumed that the second portion 135 includes a first end and a second end, and the first end of the second portion 135 is arranged near the limiting member 110, and the second end of the second portion 135 is arranged near the through hole 120. The first portion 134 is arranged at the first end of the second portion 135 and is connected to the first end of the second portion 135. The first limiting point 132 is provided at one end of the second portion 135 near the through hole 120 (i.e., the second end of the second portion 135), and the second limiting point 133 is provided at the junction of the first portion 134 and the second portion 135. Thus, in a first state (e.g., when the syringe is not in use), the syringe 300 is press-fitted into the protective sleeve 100, and the end of the syringe 300 away from the needle is retained in the limiting member 110. When the limiting protrusion 310 is located at the first limiting point 132 in the limiting groove 130, the needle can pass through the through hole 120 and be exposed outside the protective sleeve 100. In the second state (such as the state after the syringe is used), after the push rod 400 applies pressure to the limit member 110, the syringe 300 is released from the limit member 110 under the thrust of the elastic member 200, and the limit protrusion 310 is located at the second limit point 133 in the limit groove 130. At this time, the needle enters the interior of the protective cover 100 through the through hole 120 and can be completely surrounded by the protective cover 100.

[0063] It is understandable that the above-mentioned trough body consisting of the first part and the second part is only an exemplary and non-restrictive description. Without violating the inventive concept of the present application, the trough body can also be set to other shapes or structures.

[0064] In order to facilitate the assembly of the syringe 300 in the protective sleeve 100, further referring to the figure, in an embodiment of the present application, a passage groove 150 is further provided on the inner wall of the end of the protective sleeve 100 close to the limit member 110, and an opening is provided at the end of the passage groove 150 away from the first part 134, so that the end of the passage groove 150 away from the first part 134 is connected to the outside of the protective sleeve 100, and the end of the passage groove 150 close to the first part 134 is connected to the first part 134, so that the limiting protrusion 310 can enter the passage groove 150 through the opening and can enter the limiting groove along the passage groove 150.

[0065] Preferably, the passage groove 150 is provided at one end of the first part 134 away from the second part 135, and the passage groove 150 and the first part 134 are arranged perpendicular to each other to prevent the syringe from being rushed out of the inside of the protective cover 100 due to the thrust of the elastic member after the syringe is used, causing the syringe to fall out of the protective cover.

[0066] It should be noted that the specific shape of the passageway 150 is not limited in the embodiments of this application and can be configured by the user according to actual needs. This is provided as an example and not as a limitation. The passageway 150 in the embodiments of this application can be rectangular, L-shaped, Z-shaped, etc., and these are not listed here one by one.

[0067] Since the second limit point 133 is set at the connection between the first part 134 and the second part 135, the first part 134 is connected to the passage groove 150, and the end of the passage groove 150 away from the first part 134 is connected to the outside of the protective cover 100, in order to prevent the syringe from falling out of the protective cover 100 when it is pushed out from the inside of the protective cover 100 by the thrust of the elastic member in the second state (such as the state after the syringe is used), thereby exposing the needle tip to the outside of the protective cover 100, causing secondary harm to the personnel. In response to the above problem, as a preferred embodiment, the protective cover 100 in the embodiment of the present application also includes a stopper 140. As further shown in Figure 4, the stopper 140 is set at the second part 135 near the first part 134. In specific implementation, the stopper 140 is formed by extending along the edge of the first part 134 in a direction away from the edge. Preferably, the stopper 140 is formed by extending along the edge of the first part 134 (i.e., the upper edge of the first part 134) near the limiter 110 in a direction away from the edge. It should be noted that the size and shape of the stopper 140 are not specifically limited in the embodiment of the present application and can be set by the user according to actual needs. Preferably, the stopper 140 is made of an elastic material, and the distance between the stopper 140 and the edge (i.e., the lower edge) of the first portion 134 away from the stopper 110 is slightly smaller than the size of the stopper protrusion 310. Therefore, after the stopper protrusion 310 enters the first portion 134 of the stopper groove 130 through the passage groove 150, it can be deformed by applying a certain extrusion force when entering the second portion 135 along the first portion 134, thereby allowing the stopper 140 to enter the second portion 135 from the first portion 134. Conversely, when the syringe is in use, the syringe is pushed out of the protective cover 100 by the thrust of the elastic member. The stopper 140 can prevent the syringe from falling out of the protective cover 100 due to the obstruction of the syringe.

[0068] As a preferred embodiment, in the embodiment of the present application, the number of the limiting protrusions 310 can be one or more. Preferably, the number of the limiting protrusions 310 can be set to two. Correspondingly, the number of the limiting grooves 130 and the passing grooves 150 also includes two, and each limiting protrusion is used in conjunction with one of the limiting grooves and one of the passing grooves. Further preferably, the two limiting protrusions 310 are symmetrically arranged on the outer wall of the syringe 300, the two limiting grooves 130 are symmetrically arranged on the side wall of the protective cover 100, and the two passing grooves are symmetrically arranged on the inner wall of the protective cover 100 near the end of the limiting member 110. It can be understood that arranging the limiting protrusions 310 and other components in a symmetrical arrangement is conducive to smoother movement of the limiting protrusions 310 in the limiting grooves 130 and the passing grooves 150 to avoid jamming.

[0069] It is understandable that the syringe 300 includes a first end and a second end that are arranged opposite to each other, the first end is provided with a first flange 320, and the second end is provided with a needle 350. Specifically, the first flange 320 is formed at the first end of the syringe 300 and extends radially outward along the syringe. Correspondingly, as a preferred embodiment, in the embodiment of the present application, the limiter 110 includes a connector 111 and a second flange 112. Further referring to Figure 4, the connector 111 is connected to the protective sleeve 100, and the second flange 112 is formed at one end of the connector 111 away from the protective sleeve and extends radially inward along the protective sleeve. In the first state (such as the syringe is not in use), when the syringe 300 is pressed into the protective sleeve 100, the second flange 112 abuts against the first flange 320 to press the syringe 300 into the protective sleeve 100.

[0070] With further reference to FIG. 4 , as a preferred embodiment, in the embodiment of the present application, a side edge of the second flange 112 away from the connector 111 is recessed inward (i.e., toward the connector 111) to form a notch 113. The size and shape of the notch 113 match the push-twist cap 410 of the push rod 400. For example, as an illustrative and non-limiting explanation, when the push-twist cap 410 is cylindrical, the notch 113 is an inwardly recessed arc. The provision of the notch 113 facilitates the release of the syringe by the stopper when the push rod 400 applies pressure to the stopper.

[0071] As a preferred embodiment, in the embodiment of the present application, the limiting members 110 include at least two. When the number of the limiting members 110 is two, the two limiting members 110 are arranged opposite to each other at one end of the protective cover 100. When the number of the limiting members 110 is more than two, the limiting members 110 are arranged at intervals at one end of the protective cover 100.

[0072] As a preferred example, in the embodiment of the present application, the push rod can apply force to the stopper 110 to release the first flange of the syringe from the stopper 110. The stopper 110 is preferably made of an elastic material. With this arrangement, when the push rod pushes the bottom of the syringe, the push rod applies pressure to the stopper 110, causing the stopper 110 to deform, thereby releasing the first flange of the syringe trapped therein, allowing the syringe to move away from the through hole under the thrust of the elastic member, thereby allowing the needle to enter the protective sleeve through the through hole.

[0073] In order to reduce the amount of materials used in the production of the protective cover and reduce costs, in an embodiment of the present application, at least one weight-reducing groove 160 is further provided on the protective cover. Further referring to FIG4 , the weight-reducing groove 160 is provided on the side wall of the protective cover and passes through the side wall of the protective cover. The number, size and shape of the weight-reducing grooves 160 are not specifically limited in this application, and users can set them according to actual needs. Further referring to FIG4 , as an exemplary and non-restrictive explanation, in an embodiment of the present application, the number of weight-reducing grooves 160 can be four, and the four weight-reducing grooves are arranged on the side wall of the protective cover in pairs, and the shape of the weight-reducing grooves can be any regular shape or any irregular shape such as a rectangle, a circle, a triangle, a trapezoid, a diamond, etc.

[0074] Example 2

[0075] Corresponding to the above-mentioned syringe protection device, an embodiment of the present application provides a safety syringe. Referring to FIG5 , the safety syringe includes a syringe barrel 300 and a push rod 400 that cooperate with each other, as well as the above-mentioned syringe protection device. The syringe protection device includes a protective sleeve 100 and an elastic member 200. The protective sleeve 100 is provided with a limit member 110 at one end and a through hole 120 at the other end. For details regarding the syringe protection device, please refer to the content of Example 1 and will not be elaborated here.

[0076] With further reference to Figures 2 and 3, in a first state (such as when the syringe is not in use), the syringe barrel 300 is pressed into the protective sleeve 100, and the end of the syringe barrel 300 away from the needle is clamped in the limiter 110, and the needle is exposed to the outside of the protective sleeve 100 through the through hole 120 for subsequent injection; in a first state (such as when the syringe is in use), after the push rod 400 applies pressure to the limiter 110, the syringe barrel 300 is released from the limiter 110 under the thrust of the elastic member 200, and the needle enters the interior of the protective sleeve 100 through the through hole 120 to avoid secondary injury to the person caused by the needle.

[0077] 5 , the syringe 300 generally includes a stopper 310, a first flange 320, a needle holder 330, a liquid inlet 340, a needle 350, a needle cap 360, and a barrel 370. The stopper 310 is disposed on the sidewall of the barrel 370. Preferably, the stopper 310 is disposed on one end of the barrel 370 near the through hole 120, and the stopper 310 is movable along the stopper groove 130. A storage space is formed within the barrel 370 for storing the medicinal solution to be injected. The needle holder 330 and the liquid inlet 340 are disposed at opposite ends of the barrel 370 and are both connected to the storage space within the barrel 370. The needle 350 is disposed within the needle holder 330 and is connected to the storage space within the barrel 370 for subsequent injection of the medicinal solution. The needle cap 360 is mounted on the outside of the needle 350 to protect the needle 350 from contamination and to protect relevant personnel from being pricked by the needle.

[0078] As an optional implementation, in the embodiment of the present application, the limiting protrusion is integrally formed with the outer wall of the syringe.

[0079] As another optional embodiment, in the embodiment of the present application, the limiting protrusion is connected to the outer wall of the syringe, wherein the present application does not limit the specific connection method between the limiting protrusion and the outer wall of the syringe. As an example, the limiting protrusion and the outer wall of the syringe can be connected by pasting, gluing, etc.

[0080] With further reference to Figure 5, push rod 400 includes a push-twist cap 410, a connecting rod 420 and a seal 430. The push-twist cap 410 and the seal 430 are respectively connected to the opposite ends of the connecting rod 420. The push-twist cap 410 is used to provide a force application point to relevant personnel when the syringe is in use. The seal 430 is interference fit with the syringe to prevent the syringe from leaking. Preferably, the push-twist cap 410 and the connecting rod 420 are made of the same material, and the seal 430 is made of an elastic material. Further preferably, the push-twist cap 410 and the connecting rod 420 are integrally formed, and the seal 430 and the connecting rod 420 are threadedly connected. Exemplarily, the seal 430 is provided with an internal thread, and one end of the connecting rod 420 connected to the seal 430 is provided with an external thread matching the internal thread, and the seal 430 and the connecting rod 420 are threadedly connected by the internal thread and the external thread.

[0081] When assembling the safety syringe, first put the elastic member 200 into the protective cover 100, and then insert the syringe barrel 300 through the protective cover 100 and the elastic member 200. Specifically, the needle fixing member 330 and the needle 350 of the syringe barrel 300 pass through the elastic member 200, and the needle fixing member 330 and the needle 350 are inserted through the through hole 120 opened at the bottom of the protective cover 100 and exposed to the outside of the protective cover 100. The limiting protrusion 310 passes through the passage groove opened on the protective cover 100. 150, enters the first portion 134 of the limiting groove 130, and enters the second portion 135 of the limiting groove 130 through the first portion 134 of the limiting groove 130 until it moves to the first limiting point 132. At this time, the elastic member 200 forms an elastic force under the pressure of the syringe 300 and the protective cover 100, and the limiting member 110 on the protective cover 100 buckles onto the first flange 320 of the syringe 300, restricting the syringe 300 and preventing the syringe 300 and the protective cover 100 from being bounced apart by the elastic member 200. The needle cap 360 is placed on the needle head 350 to form a seal. After the liquid is poured into the liquid inlet 340 at the top of the syringe 300, the connecting rod 420 of the push rod 400 is connected to the sealing member 430 through a screw connection, and then inserted into the syringe 300 to form the entire safety syringe (i.e., the syringe in the unused state).

[0082] When the safety syringe is used, the needle cap 360 is removed from the needle 350 and the push-twist cap 410 is pressed downward to squeeze the liquid medicine. After the liquid medicine is injected, the push-twist cap 410 reaches the first end of the syringe 300 and squeezes the second flange 112 of the limiter 110 of the protective sleeve 100, and the syringe 300 is dislocated from the limiter 110. The elastic member 200 bounces the syringe 300 in the opposite direction, and the protective cover 100 bounces in the opposite direction at the first limit point 132 of the limit groove 130. The limit protrusion 310 moves in the opposite direction from the first limit point 132 of the limit groove 130 to the second limit point 133 of the limit groove. The needle 350 enters the protective cover 100 through the through hole 120 and is covered by the protective cover 100. The use state is completed. At the same time, the limit protrusion 310 is restricted at the second limit point 133, so that the syringe 300 and the protective cover 100 cannot move to expose the needle 350, thereby playing a protective role and avoiding secondary harm to people.

[0083] In the description of the present application, it should be understood that the terms "vertical", "parallel", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, "multiple" means two or more.

[0084] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0085] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A syringe protection device, wherein the syringe comprises at least a syringe barrel, characterized in that: The device at least comprises a protective cover and an elastic member; The protective sleeve is sleeved on the outside of the syringe, a limiting member is arranged at one end of the protective sleeve, and a through hole is opened at the other end; The elastic member is sleeved on the syringe, and the syringe is pressed into the protective sleeve after the elastic member is sleeved on the syringe; In the first state, the syringe is pressed into the protective sleeve, one end of the syringe away from the needle is clamped in the stopper, and the needle passes through the through hole and is exposed outside the protective sleeve; In the second state, the end of the syringe away from the needle is away from the limiting member, and the needle is covered inside the protective cover.

2. The syringe protection device according to claim 1, characterized in that: A limiting convex point is arranged on the outer wall of the syringe, and a limiting groove is arranged on the side wall of the protective sleeve, and the limiting convex point can move along the limiting groove.

3. The syringe protection device according to claim 2, characterized in that: The limiting groove comprises a groove body and a first limiting point and a second limiting point located at different positions of the groove body; The limiting protrusion can reach the first limiting point or the second limiting point along the groove body; In the first state, the limiting protrusion is located at the first limiting point, and in the second state, the limiting protrusion is located at the second limiting point.

4. The syringe protection device according to claim 3, characterized in that: The groove body at least comprises a first part and a second part which are connected to each other, the first part is arranged along the circumference of the protective sleeve, and the second part is arranged along the axial direction of the protective sleeve; The first limiting point is located at one end of the second part close to the through hole, and the second limiting point is located at the connection between the first part and the second part.

5. The syringe protection device according to claim 4, characterized in that: The protective cover further includes a stopper, and the stopper is formed by extending along an edge of the first portion close to the limiting member toward a direction away from the edge.

6. The syringe protection device according to claim 5, characterized in that: A passage groove is arranged on the inner wall of one end of the protective cover close to the limiting member, one end of the passage groove is connected with the first part of the limiting groove, and the limiting protrusion can enter the limiting groove along the passage groove.

7. The syringe protection device according to any one of claims 1 to 6, characterized in that: The number of the limiting protrusions, the limiting grooves and the passing grooves all includes two, and each of the limiting protrusions is used in conjunction with one of the limiting grooves and one of the passing grooves.

8. The syringe protection device according to claim 7, characterized in that: The two limiting protrusions are symmetrically arranged on the outer wall of the syringe, the two limiting grooves are symmetrically arranged on the side wall of the protective sleeve, and the two passing grooves are symmetrically arranged on the inner wall of the protective sleeve at one end close to the limiting member.

9. The syringe protection device according to any one of claims 1 to 6, characterized in that: The syringe comprises a first end and a second end which are arranged opposite to each other, the first end is provided with a first flange extending radially outward from the syringe, and the second end is provided with the needle; The limiting member includes a connecting member connected to the protective sleeve and a connecting member disposed away from the protective sleeve. A second flange is formed by extending radially inwardly from one end of the protective sleeve; In the first state, the second flange abuts against the first flange to press fit the syringe into the protective sleeve.

10. The syringe protection device according to claim 9, characterized in that: The limiting members include at least two, and at least two limiting members are arranged opposite to each other or spaced apart at one end of the protective sleeve.

11. The syringe protection device according to claim 10, characterized in that: The material of the limiting member is elastic material.

12. The syringe protection device according to any one of claims 1 to 6, characterized in that: The elastic member includes a spring.

13. The syringe protection device according to any one of claims 1 to 6, characterized in that: At least one weight-reducing groove is also provided on the side wall of the protective cover.

14. A safety syringe, comprising a syringe and a push rod that cooperate with each other, characterized in that: Also includes the syringe protection device according to any one of claims 1 to 13, the protection device at least comprising a protective sleeve and an elastic member, a limiting member is provided at one end of the protective sleeve, and a through hole is opened at the other end; In the first state, the syringe is pressed into the protective sleeve, one end of the syringe away from the needle is clamped in the stopper, and the needle passes through the through hole and is exposed outside the protective sleeve; In the second state, the end of the syringe away from the needle is away from the limiting member, and the needle is covered inside the protective cover.

15. The safety syringe according to claim 14, characterized in that: A limiting convex point is arranged on the outer wall of the syringe, and a limiting groove is arranged on the side wall of the protective sleeve, and the limiting convex point can move along the limiting groove.

16. The syringe protection device according to claim 14, characterized in that: The limiting protrusion is integrally formed with the outer wall of the syringe or the limiting protrusion is connected to the outer wall of the syringe.

17. The safety syringe according to claim 14 or 15, characterized in that: The limiting protrusion is arranged on the outer wall of the syringe close to one end of the through hole.

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