Safety protection device for injection and injector

Abstract

The utility model discloses a safety protection device for injection and an injector, the safety protection device for injection comprises a base which can be sleeved on a needle cylinder, one end of the base is provided with a limiting table, the other end of the base is provided with a clamping jaw, and the clamping jaw abuts against a step; the sleeve is movably mounted on the needle cylinder, and a first limiting part and a second limiting part are arranged on the sleeve; when the sleeve is in an initial state or a protection state to shield the needle head, the first limiting part is clamped with the limiting table, and when the sleeve is in a recovery state to release the needle head, the second limiting part is clamped with the limiting table. According to the safety protection device for injection, the base and the sleeve are arranged, the limiting table is arranged on the base, limiting of the sleeve in the initial state, the protection state and the recovery state is achieved, the base and the needle cylinder are arranged in a split mode, machining of the base can be facilitated, and through the arrangement of the clamping jaws, machining is convenient, and machining efficiency is improved. The base and the needle cylinder are more convenient to assemble, the assembling efficiency is high, and installation is firm.

Description

Technical Field

[0001] The utility model relates to the field of syringe equipment, in particular to a safety protection device for injection and a syringe. Background Art

[0002] Currently, prefilled syringes need to be recycled after use, and the exposed needle is a risk to both patients and medical staff. The needle can easily puncture the rubber core when it is inserted back into the protective cap, so the whole process is very difficult.

[0003] In order to protect the needle and reduce the risk of injury to the staff, the pre-filled protective device in the prior art generally adopts a sleeve method. When the syringe is used, the sleeve is retracted to the syringe barrel to expose the needle. After the syringe is used, the sleeve is extended to the needle to block the needle and prevent the needle from being exposed. However, the pre-filled protective device in the prior art often needs to be assembled by the user before use. It is too large, takes up transportation space, and has processing costs. In addition, there are too many matching items, which greatly increases the risk of failure.

[0004] Therefore, how to improve the ease of use of the injection safety protection device and reduce the cost is a technical problem that those skilled in the art currently need to solve. Utility Model Content

[0005] The utility model aims to provide a safety protection device and a syringe for injection, which can reduce production cost, facilitate operation and have high stability.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A safety protection device for injection, applied to a syringe, wherein a step is provided at the front end of the syringe; comprising:

[0008] A base can be sleeved on the syringe, and one end of the base is provided with a limit platform, and the other end is provided with a claw, and the claw abuts against the step;

[0009] A sleeve is movably mounted on the syringe, and is provided with a first limiting portion and a second limiting portion; when the sleeve is in an initial state or a protective state to cover the needle, the first limiting portion is engaged with the limiting platform, and when the sleeve is in a retracted state to release the needle, the second limiting portion is engaged with the limiting platform.

[0010] Preferably, a limiting arm is further provided on the sleeve, and when the sleeve moves toward the second direction, the suspended end of the limiting arm can pass over the limiting platform, or be clamped with the second side of the limiting platform.

[0011] Preferably, it also includes a soft needle cap for covering the needle head, the soft needle cap is detachably mounted on the syringe, and a support platform is provided on the soft needle cap, and the support platform can lift the suspended end of the limit arm so that the suspended end passes over the limit platform when the sleeve moves toward the second direction.

[0012] Preferably, the base, the soft needle cap and the sleeve are preassembled into a protection assembly.

[0013] Preferably, a damping component is further provided on the inner wall of the sleeve, and the damping component is arranged close to the second limiting portion. When the sleeve is in the recovery state, the damping component is in contact with the surface of the syringe.

[0014] Preferably, the base and / or the sleeve is a plastic part.

[0015] Preferably, the second limiting portion is an internal thread arranged inside the sleeve; the limiting platform is provided with an external thread, and the internal thread and the external thread can be tightened and fixed.

[0016] Preferably, the inner circumference of the limiting platform is a conical surface, and the taper of the inner circumference of the limiting platform is different from the taper of the front end outer circumference of the syringe, so that the outer end of the inner wall of the limiting platform is in line contact with the front end outer circumference of the syringe.

[0017] Preferably, the inner circumferential surface of the clamping jaw is a conical surface, the diameter of the inner circumferential surface of the clamping jaw gradually increases from one end away from the limit platform to the other end, and the taper of the inner circumferential surface of the clamping jaw is greater than the conical surface of the front end outer circumferential surface of the syringe, so that a gap is formed between the inner wall of the clamping jaw and the front end outer circumferential surface of the syringe.

[0018] The utility model also provides a syringe, comprising any one of the above-mentioned safety protection devices for injection.

[0019] The injection safety protection device provided by the utility model is applied to a syringe, and a step is provided at the front end of the syringe; it comprises: a base, which can be sleeved on the syringe, and a limit platform is provided at one end of the base, and a clamping claw is provided at the other end, and the clamping claw abuts against the step; a sleeve, which is movably mounted on the syringe, and a first limit part and a second limit part are provided on the sleeve; when the sleeve is in an initial state or a protective state to cover the needle, the first limit part is clamped with the limit platform, and when the sleeve is in a recovery state to release the needle, the second limit part is clamped with the limit platform. The safety protection device for injection provided by the utility model realizes the limitation of the sleeve in the initial state, the protection state and the recovery state by arranging the base and the sleeve and arranging the limit platform on the base. The base and the syringe are arranged separately, which facilitates the processing of the base. The material of the base can be selected to be processed with a material with lower cost than that of the syringe, thereby reducing the processing cost. Moreover, by the arrangement of the clamping claws, the assembly of the base and the syringe is more convenient, the assembly efficiency is high, and the installation is firm.

[0020] The syringe provided by the utility model is provided with the above-mentioned injection safety protection device. Since the above-mentioned injection safety protection device has the above-mentioned technical effects, the syringe provided with the injection safety protection device should also have corresponding technical effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 This is a schematic diagram of the exploded structure of a specific implementation of the injection safety protection device provided by the utility model;

[0023] Figure 2-1 This is a schematic diagram of the structure of the injection safety protection device provided by the utility model in the initial state;

[0024] Figure 2-2 for Figure 2-1 An enlarged schematic diagram of structure A is shown;

[0025] Figure 3-1 A schematic diagram of the injection safety protection device provided by the utility model in a recovery state;

[0026] Figure 3-2 for Figure 3-1AA cross-sectional schematic diagram of the safety protection device for injection shown;

[0027] Figure 3-3 for Figure 3-2 An enlarged schematic diagram of structure B is shown;

[0028] Figure 4-1 A schematic diagram of the injection safety protection device provided by the utility model in the protection state;

[0029] Figure 4-2 for Figure 4-1 A schematic diagram of the BB cross section of the safety protection device for injection shown;

[0030] Figure 4-3 for Figure 4-2 An enlarged schematic diagram of the C structure shown;

[0031] Figure 5-1 for Figure 1 A left side view of the sleeve in the safety protection device for injection shown;

[0032] Figure 5-2 for Figure 5-1 A schematic CC cross-sectional view of the sleeve shown;

[0033] Figure 6-1 for Figure 1 A front view of the sleeve in the safety protection device for injection shown;

[0034] Figure 6-2 for Figure 6-1 A schematic diagram of the DD section of the sleeve shown;

[0035] Figure 7-1 for Figure 1 The assembly diagram of the syringe and the base in the injection safety protection device shown;

[0036] Figure 7-2 for Figure 7-1 An enlarged schematic diagram of the D structure shown;

[0037] Wherein: sleeve 1; first limiting part 11; second limiting part 12; limiting arm 13; damping component 14; soft needle cap 2; supporting platform 21; notch 22; base 3; limiting platform 31; claw 32; syringe 4; step 41; needle 42. DETAILED DESCRIPTION

[0038] The core of the utility model is to provide a safety protection device and a syringe for injection, which can ensure reliability while reducing the manufacturing difficulty and cost as much as possible.

[0039] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0040] Please refer to Figure 1 to Figure 7-2 , Figure 1 This is a schematic diagram of the exploded structure of a specific implementation of the injection safety protection device provided by the utility model; Figure 2-1 This is a schematic diagram of the structure of the injection safety protection device provided by the utility model in the initial state; Figure 2-2 for Figure 2-1 An enlarged schematic diagram of structure A is shown; Figure 3-1 A schematic diagram of the injection safety protection device provided by the utility model in a recovery state; Figure 3-2 for Figure 3-1 AA cross-sectional schematic diagram of the safety protection device for injection shown; Figure 3-3 for Figure 3-2 An enlarged schematic diagram of structure B is shown; Figure 4-1 A schematic diagram of the injection safety protection device provided by the utility model in the protection state; Figure 4-2 for Figure 4-1 A schematic diagram of the BB cross section of the safety protection device for injection shown; Figure 4-3 for Figure 4-2 An enlarged schematic diagram of the C structure shown; Figure 5-1 for Figure 1 A left side view of the sleeve in the safety protection device for injection shown; Figure 5-2 for Figure 5-1 A schematic CC cross-sectional view of the sleeve shown; Figure 6-1 for Figure 1 A front view of the sleeve in the safety protection device for injection shown; Figure 6-2 for Figure 6-1 A schematic diagram of the DD section of the sleeve shown; Figure 7-1 for Figure 1 The assembly diagram of the syringe and the base in the injection safety protection device shown; Figure 7-2 for Figure 7-1 A magnified schematic diagram of the D structure is shown.

[0041] In this embodiment, the injection safety protection device is applied to the syringe 4, and a step 41 is provided at the front end of the syringe 4; it includes: a base 3, which can be sleeved on the syringe 4, and a limit platform 31 is provided at one end of the base 3, and a claw 32 is provided at the other end, and the claw 32 abuts against the step 41; a sleeve 1, which is movably installed on the syringe 4, and a first limit portion 11 and a second limit portion 12 are provided on the sleeve 1; when the sleeve 1 is in the initial state or the protective state to cover the needle 42, the first limit portion 11 is engaged with the limit platform 31, and when the sleeve 1 is in the recovery state to release the needle 42, the second limit portion 12 is engaged with the limit platform 31.

[0042] Specifically, the role of the injection safety protection device is to prevent the needle 42 from being exposed and reduce personal injury to the user; the base 3 plays a limiting role, by installing the base 3 on the syringe 4, and then limiting the position of the sleeve 1 to ensure the position stability of the sleeve 1 in different states; specifically, when the sleeve 1 is in the initial state, such as Figure 2-1 and Figure 2-2 As shown in FIG. 1 , the injection safety protection device is assembled with the syringe 4. At this time, the sleeve 1 covers the needle 42, which is convenient for transportation and taking. When in use, the sleeve 1 needs to be pulled in a direction away from the needle 42 so that the sleeve 1 enters a recovery state. Figure 3-1 to Figure 3-3 As shown, the needle 42 is exposed at this time, which is convenient for injection. After the injection is completed, the sleeve 1 is returned to the initial position again. At this time, the needle 42 is in a protective state, as shown in FIG. Figure 4-1 to Figure 4-3 As shown, the needle 42 is no longer used, and the sleeve 1 can prevent the needle 42 from hurting the user.

[0043] Furthermore, there may be multiple claws 32 on the base 3, which are preferably evenly distributed around the limit platform 31 of the base 3 to ensure the positional stability of the base 3. It should be noted that after the base 3 and the syringe 4 are assembled, the end of the claw 32 of the base 3 should abut against the step 41, and the end of the limit platform 31 of the base 3 should be fitted and fixed to the surface of the syringe 4 to ensure that the axial and radial directions of the base 3 are restricted to avoid shaking of the base 3, thereby ensuring the positional stability of the sleeve 1.

[0044] Furthermore, the first limiting portion 11 and the second limiting portion 12 of the sleeve 1 can be structures such as a buckle, a clamping arm or a limiting boss. If the above structure is adopted, when the sleeve 1 is in the initial state or the protective state to cover the needle 42, the first limiting portion 11 is clamped with the first side of the limiting platform 31, and when the sleeve 1 is in the recovery state to release the needle 42, the second limiting portion 12 is clamped with the second side of the limiting platform 31; the first side of the limiting platform 31 is the side of the limiting platform 31 away from the needle 42, and the second side of the limiting platform 31 is the side of the limiting platform 31 close to the needle 42.

[0045] In one embodiment, in order to ensure that the sleeve 1 does not shake when it is in the protection state, the first limit portion 11 and the limit platform 31 are preferably threadedly connected, and the first limit portion 11 and the limit platform 31 can be fastened, that is, the first limit portion 11 and the limit platform 31 have different pitches, which can ensure that the first limit platform 31 is better threadedly fastened with the limit platform 31. When the position of the sleeve 1 needs to be changed, the first limit portion 11 and the limit platform 31 can be twisted to separate;

[0046] Similarly, in order to ensure that the sleeve 1 does not shake when it is in the recovered state, the second limit portion 12 and the limit platform 31 are also preferably threadedly connected, that is, the second limit portion 12 is an internal thread arranged inside the sleeve 1, and the limit platform 31 is provided with an external thread, and the internal thread and the external thread can be tightened and fixed; and the second limit portion 12 and the limit platform 31 can be tightened, that is, the second limit portion 12 and the limit platform 31 have different pitches, which can ensure that the second limit platform 31 is better threadedly fastened with the limit platform 31. When the position of the sleeve 1 needs to be changed, the second limit portion 12 and the limit platform 31 can be separated by twisting.

[0047] The safety protection device for injection provided by the utility model is provided with a base 3 and a sleeve 1, and a limit platform 31 is provided on the base 3 to limit the sleeve 1 in the initial state, the protection state and the recovery state. The separate setting of the base 3 and the syringe 4 can facilitate the processing of the base 3. The material of the base 3 can be selected to be processed with a material with lower cost than the syringe 4, thereby reducing the processing cost. In addition, through the setting of the claw 32, the assembly of the base 3 and the syringe 4 is more convenient, the assembly efficiency is high, and the installation is firm.

[0048] In some embodiments, Figure 5-1 to Figure 6-2 As shown, the sleeve 1 is further provided with a limit arm 13, and when the sleeve 1 moves toward the second direction, the suspension end of the limit arm 13 can pass over the limit platform 31, or be engaged with the second side of the limit platform 31. Specifically, through the setting of the limit arm 13, the limit arm 13 forms a protrusion inside the sleeve 1 in the initial state, and when supported by external force, the limit arm 13 can swing to be flush with the inner wall of the sleeve 1, and at this time, the limit arm 13 will not play a limiting role. When the sleeve 1 is in the initial state, the first limit portion 11 is engaged with the limit platform 31. When the sleeve 1 needs to be recovered, the limit arm 13 is swung at least flush with the inner wall of the sleeve 1 by external force. At this time, the sleeve 1 can be smoothly recovered to the recovery state until the second limit portion 12 is engaged with the limit platform 31 to prevent the sleeve 1 from continuing to be recovered. Then, when the sleeve 1 is extended to the protection state again, the limit arm 13 is restricted at this time. The limit arm 13 will be engaged with the limit platform 31 under the action of elastic force. At this time, the first limit portion 11 and the limit arm 13 are respectively engaged with the left and right sides of the limit platform 31, so as to ensure that the sleeve 1 is stably locked in the position of the limit platform 31 and cannot move, thereby achieving the protection purpose.

[0049] Preferably, the suspended end of the limit arm 13 has a plane that can abut against the end surface of the limit platform 31 , a boss is provided on the inner wall of the limit arm 13 , and guide slopes are provided on both sides of the boss to ensure that the limit arm 13 passes over the limit platform 31 smoothly.

[0050] In some embodiments, a soft needle cap 2 for covering the needle 42 is further included, and the soft needle cap 2 is detachably mounted on the syringe 4. A support platform 21 is provided on the soft needle cap 2, and the support platform 21 can lift the suspension end of the limit arm 13 so that when the sleeve 1 moves toward the second direction, the suspension end passes over the limit platform 31. The support platform 21 is consistent with the size of the limit portion, so that when the sleeve 1 is retracted, the first limit arm 13 can pass over the limit portion. Specifically, the support platform 21 cooperates with the guide bevel, and when the sleeve 1 moves toward the rear end of the syringe 4, the support platform 21 will support the limit arm 13, so that the limit arm 13 swings toward the outside of the sleeve 1 until the boss on the limit arm 13 smoothly passes over the limit platform 31; after the injection is completed, since the soft needle cap 2 is removed at this time, the support platform 21 no longer works, and when the sleeve 1 moves toward the front end of the syringe 4, the limit arm 13 will pass over the limit platform 31 again under the action of the guide bevel, and then under the elastic deformation of the limit arm 13, the end face of the suspension end of the limit arm 13 will fit with the end face of the limit platform 31 to achieve a snap connection. Preferably, the soft needle cap 2 is a rubber soft needle cap 2, which is easy to process, easy to disassemble and assemble, and has a good protective effect.

[0051] Furthermore, in order to ensure that the soft needle cap 2 can be removed smoothly, a notch 22 is provided at one end of the soft needle cap 2 close to the syringe 4 to avoid the second limiting portion 12 structure of the second sleeve 1.

[0052] In some embodiments, the base 3, the soft needle cap 2 and the sleeve 1 are preassembled as a protective component. Specifically, since the base 3 and the syringe 4 are limited by the claw 32, the claw 32 can be automatically reset under the action of elastic deformation. Therefore, the base 3, the soft needle cap 2 and the sleeve 1 can be preassembled as a protective component, and then the entire protective component can be loaded into the syringe 4. During assembly, the base 3 and the sleeve 1 will be fixed to the syringe 4 at the same time; through preassembly, the syringe 4 or the protective component can be produced separately, reducing the difficulty of assembly. In other words, two plastic parts, namely the base 3 and the sleeve 1, and a rubber part, namely the soft needle cap 2, can be combined into a unit, which can be sterilized and sold as a whole to improve market competitiveness.

[0053] In some embodiments, a damping component 14 is further provided on the inner wall of the sleeve 1, and the damping component 14 is provided close to the second limiting portion 12. When the sleeve 1 is in the retracted state, the damping component 14 is in contact with the surface of the syringe 4. Specifically, the damping component 14 is preferably rubber. By providing the damping component 14, the sleeve 1 can be prevented from sliding toward the front end of the syringe 4 when in the retracted state, thereby ensuring the smooth progress of the injection process.

[0054] In some embodiments, the first limiting portion 11 and / or the second limiting portion 12 is a limiting boss, and an introduction slope is provided on one side of the limiting boss of the first limiting portion 11. Specifically, the introduction slope of the first limiting portion 11 is located on one side of the second limiting portion 12, so that when the sleeve 1 is loaded into the syringe 4, the introduction slope first cooperates with the limiting platform 31 until the end face of the limiting boss of the first limiting portion 11 is engaged with the end face of the limiting platform 31, so that the sleeve 1 cannot move toward the front end of the syringe 4. The end face of the limiting boss of the second limiting portion 12 faces the first limiting portion 11, ensuring that when the sleeve 1 is in the recovery state, the sleeve 1 will not continue to move toward the rear end of the syringe 4.

[0055] In some embodiments, the base 3 and / or the sleeve 1 are plastic parts, which are low in cost, easy to process and convenient to assemble. Specifically, the parts made of plastic are preferably made of resin materials commonly used in the traditional medical industry, and are assembled and used together in a sterile environment. The assembled products can be sterilized with ethylene oxide.

[0056] In some embodiments, a chamfer is provided on the inner side of the rear end of the sleeve 1 to prevent the label scale paper on the syringe 4 from being torn off.

[0057] In some embodiments, the inner circumference of the limiting platform 31 is a conical surface, and the taper of the inner circumference of the limiting platform 31 is different from the taper of the front end outer circumference of the syringe 4, so that the outer end of the inner wall of the limiting platform 31 is in line contact with the front end outer circumference of the syringe 4. This arrangement is to ensure that when the claw 32 of the base 3 just abuts against the step 41, the outer end of the inner wall of the limiting platform 31 abuts against the front end outer circumference of the syringe 4, thereby achieving radial and axial positioning of the base 3. The above arrangement is to avoid assembly interference problems caused by processing errors, thereby ensuring the installation reliability and stability of the base 3. Preferably, the base 3 is integrally cast. In order to facilitate the molding of the base 3, the inner circumference of the limiting platform 31 gradually increases in diameter from one end close to the claw 32 to the other end, that is, the inner circumference of the limiting platform 31 should have a certain draft angle to facilitate demolding.

[0058] In some embodiments, Figure 7-1 and Figure 7-2As shown, the inner circumference of the claw 32 is a conical surface, and the diameter of the inner circumference of the claw 32 gradually increases from one end away from the limiting platform 31 to the other end, and the taper of the inner circumference of the claw 32 is greater than the conical surface of the front end outer circumference of the syringe 4, so that a gap is formed between the inner wall of the claw 32 and the front end outer circumference of the syringe 4. Similarly, the inner circumference of the claw 32 gradually increases in diameter from one end away from the limiting platform 31 to the other end, so that the inner circumference of the claw 32 has a certain draft angle, which is convenient for demoulding. The above arrangement, by forming a gap between the inner wall of the claw 32 and the front end outer circumference of the syringe 4, can reduce the assembly interference problem caused by processing errors on the one hand, and provide a certain space for the movement of the claw 32 on the other hand, so that the connection between the claw 32 and the step 41 is more reliable and the stability is improved.

[0059] Specifically, when the base 3 is axially downwardly fitted with the glass tube of the syringe 4, the claw 32 of the base 3 is elastically deformed, and after the base 3 moves axially to a certain position, the claw 32 is automatically rebounded and stuck on the step 41 of the syringe 4, and after a "click", it cannot move axially toward the front end; at this time, the lower end of the base 3, that is, the inner circumferential end of the limit platform 31 of the base 3 and the front end conical surface of the syringe 4 are in line contact, and the base 3 cannot move axially toward the rear end of the syringe 4, and there is no radial movement gap; there is no axial movement and no radial movement, and the connection between the base 3 and the syringe 4 is completed. In other words, the vertical distance between the position where the front end conical surface of the syringe 4 is in line contact with the end face of the step 41 is consistent with the axial height of the base 3; the position where the front end conical surface of the syringe 4 is in line contact with the base 3, such as Figure 7-2 As shown in FIG. 4 , its diameter is the same as the inner diameter of the end of the limiting platform 31 of the base 3.

[0060] Specifically, in a specific embodiment, the injection safety protection device comprises a sleeve 1, a soft needle cap 2 and a base 3, the base 3 is provided with a limit platform 31 and a claw 32, the soft needle cap 2 is provided with a support platform 21, and the sleeve 1 is provided with a first limit portion 11, a second limit portion 12 and a limit arm 13. The use process of the injection safety protection device comprises the following steps:

[0061] The base 3 is installed at the front end of the syringe 4, and the front end of the syringe 4 refers to the end close to the needle 42; the soft needle cap 2 is installed at the front end of the syringe 4 to cover the needle 42, and the soft needle cap 2 is stretched open by the syringe 4, and the end of the soft needle cap 2 is pressed against the end surface of the limiting platform 31 of the base 3, and the soft needle cap 2 can be removed, but cannot continue to move toward the rear end of the syringe 4; then the sleeve 1 is installed on the syringe 4 until the first limiting portion 11 of the sleeve 1 is engaged with the limiting platform 31 of the base 3; because the support platform 21 of the soft needle cap 2 will lift the limiting arm 13, the sleeve 1 can move toward the rear end of the syringe 4 to a recovery state;

[0062] Pull out the soft needle cap 2 to perform injection. After the injection is completed, the sleeve 1 moves toward the front end of the syringe 4. Since the soft needle cap 2 has been removed, when the sleeve 1 moves toward the front end of the syringe 4 to the protective state, the limit arm 13 of the sleeve 1 will pop out until the end of the limit arm 13 abuts against the limit platform 31 of the base 3. At this time, the first limit portion 11 and the limit arm 13 are simultaneously engaged with the left and right sides of the limit platform 31 to fix the position of the sleeve 1.

[0063] The injection safety protection device has a simple structure, high stability, convenient operation, few parts and low production cost.

[0064] In addition to the above-mentioned injection safety protection device, the present invention also provides a syringe including the above-mentioned injection safety protection device. For the structure of other parts of the syringe, please refer to the prior art and will not be described in detail herein.

[0065] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0066] The above is a detailed introduction to the injection safety protection device provided by the utility model. This article uses specific examples to illustrate the principle and implementation method of the utility model. The description of the above embodiments is only used to help understand the method and core idea of ​​the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A safety protection device for injection, applied to a syringe (4), wherein a step (41) is provided at the front end of the syringe (4); characterized in that: include: A base (3) can be sleeved on the syringe (4), and one end of the base (3) is provided with a limit platform (31), and the other end is provided with a clamping claw (32), and the clamping claw (32) abuts against the step (41); A sleeve (1) is movably mounted on the syringe (4), and a first limiting portion (11) and a second limiting portion (12) are provided on the sleeve (1); when the sleeve (1) is in an initial state or a protective state to shield the needle (42), the first limiting portion (11) is engaged with the limiting platform (31); when the sleeve (1) is in a retracted state to release the needle (42), the second limiting portion (12) is engaged with the limiting platform (31).

2. The safety protection device for injection according to claim 1, characterized in that: The sleeve (1) is also provided with a limit arm (13); when the sleeve (1) moves toward the second direction, the suspended end of the limit arm (13) can pass over the limit platform (31), or be clamped with the second side of the limit platform (31).

3. The injection safety protection device according to claim 2, characterized in that: It also includes a soft needle cap (2) for covering the needle head (42), the soft needle cap (2) being detachably mounted on the syringe (4), the soft needle cap (2) being provided with a support platform (21), the support platform (21) being capable of lifting up the suspension end of the limiting arm (13) so that when the sleeve (1) moves toward the second direction, the suspension end passes over the limiting platform (31).

4. The injection safety protection device according to claim 3, characterized in that: The base (3), the soft needle cap (2) and the sleeve (1) are preassembled into a protective component.

5. The injection safety protection device according to claim 1, characterized in that: A damping component (14) is also provided on the inner wall of the sleeve (1), and the damping component (14) is arranged close to the second limiting portion (12). When the sleeve (1) is in the recovery state, the damping component (14) is in contact with the surface of the syringe (4).

6. The injection safety protection device according to claim 1, characterized in that: The base (3) and / or the sleeve (1) are plastic parts.

7. The injection safety protection device according to any one of claims 1 to 6, characterized in that: The second limiting portion (12) is an internal thread arranged inside the sleeve (1); the limiting platform (31) is provided with an external thread, and the internal thread and the external thread can be tightened and fixed.

8. The injection safety protection device according to any one of claims 1 to 6, characterized in that: The inner circumference of the limiting platform (31) is a conical surface, and the taper of the inner circumference of the limiting platform (31) is different from the taper of the outer circumference of the front end of the syringe (4), so that the outer end of the inner wall of the limiting platform (31) is in line contact with the outer circumference of the front end of the syringe (4).

9. The injection safety protection device according to any one of claims 1 to 6, characterized in that: The inner circumference of the clamping claw (32) is a conical surface, and the diameter of the inner circumference of the clamping claw (32) gradually increases from one end away from the limiting platform (31) to the other end, and the taper of the inner circumference of the clamping claw (32) is greater than the taper of the outer circumference of the front end of the syringe (4), so that a gap is formed between the inner wall of the clamping claw (32) and the outer circumference of the front end of the syringe (4).

10. A syringe, comprising a safety protection device for injection, characterized in that: The injection safety protection device is the injection safety protection device according to any one of claims 1 to 9.

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