Self-destructive protection device for syringe needle

Abstract

The invention discloses a self-destruction protection device for a syringe needle, and belongs to the technical field of needle protection equipment, the self-destruction protection device comprises a syringe, a syringe needle, a protection device for wrapping and protecting the syringe needle, and a prying and separating device for conveniently separating the syringe needle from the syringe; on the premise of not changing the shapes and the injection principle of a traditional injector and a traditional injection needle, the self-destruction protection device for the injection needle is designed and is matched with a protection device of the traditional injection needle, so that the situation that the injection needle is punctured to injure a user accidentally in the process that the injection needle is taken down from the injector to be independently stored and collected is avoided, and the service life of the injection needle is prolonged. Meanwhile, residual liquid medicine in the syringe can be prevented from flowing out, the syringe needle is stored in a sealed mode, the syringe needle is directly isolated from the outside, bacteria are prevented from being volatilized in air, and the risk that the bacteria volatilize and infect after the syringe needle is used is greatly reduced.

Description

Technical Field

[0001] The invention relates to the technical field of needle protection equipment, and in particular to a self-destructive protection device for a syringe needle. Background Art

[0002] The traditional syringe is a commonly used medical device, which includes a needle, a syringe, and a push rod. The syringe consists of a syringe with a small hole at the front end and a matching piston push rod. The syringe is used to inject a small amount of liquid or gas into or extract it from areas that are inaccessible by other methods. When the push rod is pulled out, the liquid or gas is sucked from the small hole at the front end of the syringe, and the liquid or gas is squeezed out when the push rod is pushed in. The process of extracting or injecting gas or liquid with a syringe and a needle is called injection. Although this type of syringe is simple to operate, the disposable syringes that are widely used nowadays are still ordinary disposable syringes, and the syringes sold in large quantities on the market and used in clinical practice in my country are still ordinary disposable syringes.

[0003] Since the injection needle is a sharp product after the use of the syringe, the injection needle needs to be removed from the syringe and stored separately. During the removal of the injection needle, if the medical staff does not operate properly, it is easy to cause puncture and accidental injury to the medical staff's hands and infection. At the same time, after the medical staff uses the syringe to inject medicine into the patient, the needle has no protective device and is exposed to the outside, which is also easy to cause harm to the medical staff and the patient's hands, affecting the medical staff's subsequent work. Therefore, the device provides a self-destructive protection device for the syringe needle. Summary of the invention

[0004] The embodiment of the present invention provides a self-destructive protection device for a syringe needle to solve the above-mentioned technical problems.

[0005] The embodiment of the present invention adopts the following technical scheme: it includes a syringe and an injection needle, and also includes a protective device for wrapping the injection needle for protection and a prying and detaching device for conveniently detaching the injection needle from the syringe, the syringe and the injection needle are adaptively arranged, the injection needle includes a needle sleeve and a puncture needle, the needle sleeve is sleeved at the injection port of the syringe, the protective device includes a protective sleeve, a telescopic sleeve, a self-elastic telescopic component and a limiting sleeve, the protective sleeve is sleeved on the needle sleeve, the telescopic sleeve is telescopically arranged and connected to the protective sleeve, the self-elastic telescopic component is arranged on the telescopic sleeve and can provide a telescopic driving force for the telescopic sleeve, the limiting sleeve is arranged on the telescopic sleeve to limit the self-elastic telescopic component, and the prying and detaching device is arranged on the protective sleeve.

[0006] Furthermore, the upper end of the protective sleeve is trumpet-shaped, and after the protective sleeve is completely sleeved on the needle sleeve, the trumpet-shaped position of the upper end of the protective sleeve is in contact and fit with the lower end of the syringe.

[0007] Furthermore, the telescopic sleeve includes a first telescopic sleeve, a second telescopic sleeve and a third telescopic sleeve, the length of the first telescopic sleeve is greater than the length of the second telescopic sleeve, the length of the second telescopic sleeve is greater than the length of the third telescopic sleeve, the first telescopic sleeve is connected to the protective sleeve, the second telescopic sleeve is arranged inside the first telescopic sleeve and is in a rotatable and telescopic fitting state, the third telescopic sleeve is arranged inside the second telescopic sleeve and is in a rotatable and telescopic fitting state, and the first telescopic sleeve, the second telescopic sleeve and the third telescopic sleeve are all plastic transparent tubes.

[0008] Furthermore, the self-elastic telescopic assembly includes a fixed ring, a spring, a telescopic tube, a limit block and an adjusting block. The fixed ring is arranged on the outside of the first telescopic sleeve. There are two adjusting blocks, which are symmetrically arranged and located at the outer end of the third telescopic sleeve. There are two springs, one end of the two springs is respectively connected to the fixed ring and the other end is respectively connected to the corresponding adjusting block. There are two limit blocks, which are respectively arranged on the corresponding adjusting blocks, and both limit blocks are arranged in an inverted L shape. There are two telescopic tubes, the upper ends of the two telescopic tubes are respectively connected to the fixed ring and the lower ends are respectively connected to the corresponding adjusting blocks. The two telescopic tubes wrap the corresponding springs and are in a non-contact state. The two telescopic tubes are both multi-section telescopic tubes.

[0009] Furthermore, the limiting sleeve is in a circular ring shape, and is symmetrically provided with two slots adapted to the two limiting blocks and used to limit the two limiting blocks. The openings of the two slots are both straight and the inside is hook-shaped.

[0010] Furthermore, the prying and disengaging device includes a connecting block, a connecting shaft, a prying plate and a torsion spring. The protective cover is provided with a prying groove. There are two connecting blocks, and the two connecting blocks are symmetrically arranged on the outside of the protective cover and are close to the prying groove. The connecting shaft is arranged on the two connecting blocks. The middle part of the prying plate is connected to the connecting shaft through a torsion spring. The upper end of the prying plate is hook-shaped, and the upper end of the prying plate passes through the prying groove and is placed on the upper end of the needle sleeve.

[0011] Furthermore, the lower end of the third telescopic sleeve is connected to the interior through a through groove, a protective column is provided at the upper end of the internal through groove of the third telescopic sleeve, a through hole is provided in the middle of the protective column for the puncture needle to pass through, the center position of the protective column corresponds to the center position of the puncture needle, the through hole is also arranged in an inverted trapezoidal shape, the protective column is made of rubber and has a certain tension, and the lower end of the through hole is in a closed state when the puncture needle passes halfway through the through hole or does not pass through it.

[0012] Furthermore, after the second telescopic sleeve and the third telescopic sleeve are fully extended and retracted, the puncture needle can be wrapped and the head end of the puncture needle is located inside the third telescopic sleeve and does not contact the protective column.

[0013] Furthermore, it also includes a piston cap, which can be inserted into the upper end of the protective sleeve to seal the interior.

[0014] At least one of the above technical solutions adopted in the embodiments of the present invention can achieve the following beneficial effects:

[0015] Firstly, since the injection needle is a sharp product after the use of the syringe, the injection needle needs to be removed from the syringe and stored separately. During the removal of the injection needle, if the medical staff does not operate properly, it is easy to cause puncture and accidental injury to the medical staff's hands and infection. Without changing the shape and injection principle of traditional syringes and injection needles, this device is designed to be compatible with traditional injection needles to avoid puncture and accidental injury to oneself during the process of removing the injection needle from the syringe and storing it separately. At the same time, it can also prevent the residual liquid in the syringe from flowing out, and realize sealed storage of the injection needle to directly isolate the injection needle from the outside world and prevent bacteria from volatilizing into the air, greatly reducing the risk of bacterial infection after the injection needle is used.

[0016] Secondly, after the medical staff injects the drug into the syringe, the drug liquid inside the syringe is generally not completely injected out, and the residual liquid that has not been injected out generally remains at the connection position between the syringe and the injection needle. Therefore, the drug liquid remaining at the connection position between the syringe and the injection needle will flow into the third telescopic sleeve for storage through the protective sleeve during the process of the injection needle detaching from the syringe. The needle head end of the injection needle moves from the original state of being located in the third telescopic sleeve without contacting the protective column to the state where the needle head end passes halfway through the through hole. At this time, the lower end of the through hole is always in a closed state, and the residual drug liquid will not flow out and the injection needle is isolated from the outside world, which prevents bacteria from volatilizing into the air, greatly reducing the risk of bacterial volatilization infection after the injection needle is used, and realizes separate storage and collection for subsequent disposal into the sharps box. Medical staff greatly reduce the risk of accidental puncture and infection caused by their hands during the entire operation.

[0017] Thirdly, the syringe and injection needle are not packaged together with the protective device and the prying and detaching device in the device, but are packaged separately. After using the syringe, the medical staff only needs to pass the upper end of the protective cover of the protective device in the fully retracted state through the injection needle and put it on the needle sleeve in the injection needle. The whole process is relatively convenient, and the injection needle is directly isolated from the outside world to prevent bacteria from volatilizing into the air, which greatly reduces the risk of bacterial infection after the injection needle is used.

[0018] Fourthly, the current syringe and injection needle are disposable products packaged together, and the protection device and the prying and detaching device in the present device can also be directly sleeved on the injection needle for packaging together, and the protection device in the packaging state is in the state of wrapping the injection needle. In view of the above, when the medical staff uses the syringe, the syringe package is first disassembled, and then the injection needle can be directly connected to the injection port of the syringe. Next, the medical staff holds the syringe in the posture of hand injection, and hooks the middle finger and index finger of the hand on the corresponding adjustment block, and the thumb is in contact with the head end of the piston rod of the syringe. At this time, the middle finger and index finger of the medical staff's hand and the thumb are inward, that is, the middle finger and index finger are in the direction of the thumb, and the thumb is squeezed in the direction of the middle finger and index finger. The two adjustment blocks are subjected to the force to make the third telescopic sleeve move and shrink toward the inside of the second telescopic sleeve, and the second telescopic sleeve will shrink toward the inside of the first telescopic sleeve. At this time, the two springs are in a state of continuous compression, and the two telescopic tubes are also When the third telescopic sleeve is completely retracted into the second telescopic sleeve and the second telescopic sleeve is completely retracted into the first telescopic sleeve, the two limit blocks just move into the corresponding slots and are at the corresponding openings. Then the middle finger and index finger hook the two adjustment blocks and rotate them slightly, so that the corresponding limit blocks on the two adjustment blocks move toward the corresponding hook-shaped inner direction of the slots respectively. After the movement is completed, the two limit blocks will be hooked in the corresponding slots. At this time, the two springs are in a compressed state, and the injection needle has been fully exposed to the outside. Medical staff can use the syringe to extract medicine to perform puncture drug injection treatment or sprint blood extraction. The protective device in the fully retracted state will not hinder the treatment process. At this time, the length of the protective device is only one-fourth of the needle sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0020] Figure 1 The three-dimensional structure of the present invention is shown in FIG. Figure 1 ;

[0021] Figure 2 The three-dimensional structure of the present invention is shown in FIG. Figure 2 ;

[0022] Figure 3 The structure of the protective device in the present invention is shown in the fully extended state. Figure 1;

[0023] Figure 4 It is a schematic diagram of the structure of the protective device and the injection needle in the present invention in a separated state;

[0024] Figure 5 It is a schematic diagram of the three-dimensional structure of the protection device and the prying and disengaging device in the present invention;

[0025] Figure 6 It is a three-dimensional structural schematic diagram of the protection device and the piston cap in the present invention;

[0026] Figure 7 The structure of the protective device in the present invention is shown in the fully extended state. Figure 2 ;

[0027] Figure 8 The schematic diagram of the cutaway structure of the third telescopic sleeve in the present invention is shown in FIG. Figure 1 ;

[0028] Fig. 9 The schematic diagram of the cutaway structure of the third telescopic sleeve in the present invention is shown in FIG. Figure 2 ;

[0029] Fig.10 This is a schematic diagram of the structure of the protective device of the present invention wrapping the injection needle;

[0030] Fig.11 for Figure 2 Enlarged view of point A in the middle;

[0031] Fig.12 for Figure 2 Enlarged view of point B in the middle;

[0032] Fig.13 for Figure 5 Enlarged view of point C in the middle;

[0033] Fig.14 for Figure 8 Enlarged view of point D in the middle.

[0034] Reference numerals

[0035] Syringe 1, injection needle 2, needle sleeve 21, puncture needle 22, protection device 3, protection sleeve 31, prying groove 311, telescopic sleeve 32, first telescopic sleeve 321, second telescopic sleeve 322, third telescopic sleeve 323, through groove 324, protection column 325, through hole 326, self-elastic telescopic component 33, fixed ring 331, spring 332, telescopic tube 333, limit block 334, adjustment block 335, limit sleeve 34, slot 341, prying and disengaging device 4, connecting block 41, connecting shaft 42, prying plate 43, piston cap 5. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] The technical solutions provided by various embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0038] The embodiment of the present invention provides a self-destructive protection device for a syringe needle, comprising a syringe 1 and an injection needle 2, and also comprising a protection device 3 for wrapping the injection needle 2 for protection and a prying and detaching device 4 for conveniently detaching the injection needle 2 from the syringe 1. The syringe 1 and the injection needle 2 are adaptively arranged, the injection needle 2 comprises a needle sleeve 21 and a puncture needle 22, the needle sleeve 21 is sleeved at the injection port of the syringe 1, the protection device 3 comprises a protective sleeve 31, a telescopic sleeve 32, a self-elastic telescopic component 33 and a limiting sleeve 34, the protective sleeve 31 is sleeved on the needle sleeve 21, the telescopic sleeve 32 is telescopically arranged and connected to the protective sleeve 31, the self-elastic telescopic component 33 is arranged on the telescopic sleeve 32 and can provide a telescopic driving force for the telescopic sleeve 32, the limiting sleeve 34 is arranged on the telescopic sleeve 32 to limit the self-elastic telescopic component 33, and the prying and detaching device 4 is arranged on the protective sleeve 31.

[0039] Since the injection needle 2 is a sharp product after the use of the syringe 1, the injection needle 2 needs to be removed from the syringe 1 and stored separately. During the removal of the injection needle 2, if the medical staff does not operate properly, it is easy to cause puncture and accidental injury to the medical staff's hands, resulting in infection. Without changing the shape and injection principle of the traditional syringe 1 and the injection needle 2, the present device designs a self-destructive protection device for the syringe needle, and is adapted to the protection device 3 of the traditional injection needle 2 to avoid puncture and accidental injury during the process of removing the injection needle 2 from the syringe 1 for separate storage and collection. At the same time, it can also prevent the residual liquid medicine in the syringe 1 from flowing out, and realize sealed storage treatment of the injection needle 2 to directly isolate the injection needle 2 from the outside world, prevent bacteria from volatilizing into the air, and greatly reduce the risk of bacterial volatilization and infection after the injection needle 2 is used.

[0040] Preferably, the upper end of the protective cover 31 is trumpet-shaped. After the protective cover 31 is completely sleeved on the needle sleeve 21, the trumpet-shaped position of the upper end of the protective cover 31 is in contact and fit with the lower end of the syringe 1. The lower end position of the syringe 1 described here is the lower end position of the syringe 1 after removing the injection port on the syringe 1.

[0041] Preferably, the telescopic sleeve 32 includes a first telescopic sleeve 321, a second telescopic sleeve 322 and a third telescopic sleeve 323, the length of the first telescopic sleeve 321 is greater than the length of the second telescopic sleeve 322, the length of the second telescopic sleeve 322 is greater than the length of the third telescopic sleeve 323, the first telescopic sleeve 321 is connected to the protective sleeve 31, the second telescopic sleeve 322 is arranged inside the first telescopic sleeve 321 and is in a rotatable and telescopic matching state, the third telescopic sleeve 323 is arranged inside the second telescopic sleeve 322 and is in a rotatable and telescopic matching state, and the first telescopic sleeve 321, the second telescopic sleeve 322 and the third telescopic sleeve 323 are all plastic transparent tubes;

[0042] Since the first telescopic sleeve 321 , the second telescopic sleeve 322 and the third telescopic sleeve 323 are all plastic transparent tubes, the state of the puncture needle 22 during the penetration and storage of the injection needle 2 can be easily observed.

[0043] Preferably, the self-elastic telescopic assembly 33 includes a fixed ring 331, a spring 332, a telescopic tube 333, a limit block 334 and an adjustment block 335. The fixed ring 331 is arranged outside the first telescopic sleeve 321. Two adjustment blocks 335 are provided. The two adjustment blocks 335 are symmetrically arranged and located at the outer end of the third telescopic sleeve 323. Two springs 332 are provided. One end of the two springs 332 is respectively connected to the fixed ring 331 and the other end is respectively connected to the corresponding adjustment block 3 35, two limit blocks 334 are provided, and the two limit blocks 334 are respectively arranged on the corresponding adjustment blocks 335, and the two limit blocks 334 are both arranged in an inverted L shape, and two telescopic tubes 333 are provided, and the upper ends of the two telescopic tubes 333 are respectively connected to the fixed ring 331 and the lower ends are respectively connected to the corresponding adjustment blocks 335, and the two telescopic tubes 333 wrap the corresponding springs 332 and are in a non-contact state, and the two telescopic tubes 333 are multi-section telescopic tubes 333;

[0044] The device is provided with two adjustment blocks 335 so that when medical staff place the syringe 1 on the desktop after using it, the two adjustment blocks 335 will not cause the syringe 1 to roll randomly, thus achieving a limiting effect.

[0045] Preferably, the limiting sleeve 34 is in a circular ring shape, and is symmetrically provided with two slots 341 adapted to the two limiting blocks 334 and limiting the two limiting blocks 334 . The openings of the two slots 341 are both straight and hook-shaped inside.

[0046] Preferably, the prying and disengaging device 4 includes a connecting block 41, a connecting shaft 42, a prying plate 43 and a torsion spring. The protective cover 31 is provided with a prying groove 311. There are two connecting blocks 41. The two connecting blocks 41 are symmetrically arranged on the outside of the protective cover 31 and are close to the prying groove 311. The connecting shaft 42 is arranged on the two connecting blocks 41. The middle part of the prying plate 43 is connected to the connecting shaft 42 through a torsion spring. The upper end of the prying plate 43 is hook-shaped, and the upper end of the prying plate 43 passes through the prying groove 311 and is placed on the upper end of the needle sleeve 21.

[0047] Preferably, the lower end of the third telescopic sleeve 323 is connected to the interior with a through groove 324, and a protective column 325 is provided at the upper end of the internal through groove 324 of the third telescopic sleeve 323. A through hole 326 for the puncture needle 22 to pass through is provided in the middle of the protective column 325. The center position of the protective column 325 corresponds to the center position of the puncture needle 22. The through hole 326 is also arranged in an inverted trapezoidal shape. The protective column 325 is made of rubber and has a certain tension. When the puncture needle 22 passes halfway through the through hole 326 or does not pass through, the lower end of the through hole 326 is in a closed state.

[0048] Reference Figure 2 , Figure 5 and Fig.12As shown, after the medical staff completes the treatment with the syringe 1, they need to remove the injection needle 2 from the syringe 1 for separate storage and collection. At this time, the medical staff directly hooks the two adjustment blocks 335 with the middle finger and index finger, slightly pulls them upwards and rotates them in the corresponding opening direction, so that the two limit blocks 334 are disengaged from the hooks in the corresponding card slots 341. At this time, the two springs 332 are not restricted by force, and the two springs 332 are immediately released from the compressed and tight state. Under the action of the two springs 332, the third telescopic sleeve 323 will be telescoped out from the inside of the second telescopic sleeve 322, and the second telescopic sleeve 322 is also the same. The first telescopic sleeve 321 is extended and retracted, so that the first telescopic sleeve 321, the second telescopic sleeve 322 and the third telescopic sleeve 323 are in a fully extended state at this time, and the sprint needle is wrapped and protected. At this time, the two springs 332 are in a normal state. Then, the medical staff touches the upper trumpet-shaped outer part of the protective sleeve 31 with their hands, so that the protective sleeve 31 is tightly attached to the lower end of the syringe 1. At this time, the lower end of the prying plate 43 is moved outward and upward, so that the middle part of the prying plate 43 rotates with the connecting shaft 42 as the axis through the cooperation of the twisting spring, and the upper end of the prying plate 43 is moved from the upper end of the needle sleeve 21 to the upper end of the needle sleeve 21. The upper end of the prying plate 43 applies a pushing force in the opposite direction of the syringe 1 to the upper end of the needle sleeve 21, so as to separate the injection needle 2 from the injection port of the syringe 1. After the injection needle 2 is separated from the injection port of the syringe 1, since the syringe 1 is injected with drugs by medical personnel, the liquid medicine inside the syringe 1 is generally not completely injected out, and the residual liquid that is not injected out generally remains at the connection position between the syringe 1 and the injection needle 2. Therefore, the liquid medicine remaining at the connection position between the syringe 1 and the injection needle 2 will flow into the third via the protective cover 31 during the process of the injection needle 2 separating from the syringe 1. The needle head of the injection needle 2 is stored in the telescopic sleeve 323, and moves from the original state of being located inside the third telescopic sleeve 323 and contacting the protective column 325 to the state where the needle head end passes halfway through the through hole 326. At this time, the lower end of the through hole 326 is always in a closed state, and the residual liquid medicine will not flow out and the injection needle 2 is isolated from the outside world, which prevents bacteria from volatilizing into the air after the injection needle 2 is used, greatly reducing the risk of bacterial volatilization infection after use, and realizing separate storage and collection for subsequent disposal into the sharps box. During the entire operation, medical staff greatly reduce the risk of accidental puncture and infection caused by their hands.

[0049] Reference Figure 4As shown, if the syringe 1 and the injection needle 2 are not packaged uniformly with the protection device 3 and the prying and detaching device 4 in the device, but are packaged separately, the medical staff can only pass the upper end of the protection device 3 with the protection cover 31 in the fully retracted state through the injection needle 2 and sleeve it on the needle sleeve 21 in the injection needle 2 after the syringe 1 is used. The whole process is relatively convenient, and the injection needle 2 is directly isolated from the outside world to prevent bacteria from volatilizing into the air, which greatly reduces the risk of bacterial infection after the injection needle 2 is used.

[0050] Reference Fig.10 As shown, the syringes 1 sold in large quantities and used clinically in the market in my country are still ordinary disposable syringes 1. Since they do not have the self-destruction function, they are easily illegally recycled and reused, causing cross infection and easily causing disease transmission. Therefore, after the syringe 1 is used, the injection needle 2 needs to be destroyed. After the medical staff of the device completes the treatment with the syringe 1, they first detach the injection needle 2 from the injection port of the syringe 1. At this time, the head end of the injection needle 2 is inserted into the through hole 326 in the protective column 325 and the protective column 325 is also In the closed state, then, the protective cover 31 and the needle sleeve 21 are separated from the sleeve state, and the protective cover 31 is pressed down a certain distance in the direction of the third telescopic sleeve 323, so that the protective cover 31 is in an exposed state. At this time, the medical staff only needs to hold the needle sleeve 21 with one hand to keep it still, and hold the telescopic sleeve 32 with the other hand to force it, then the puncture needle 22 will be bent. During the whole process, the medical staff will not be injured by puncture, and the self-destruction method of the injection needle 2 is relatively simple. After the puncture needle 22 is bent, it can be discarded into the sharps box.

[0051] Preferably, after the second telescopic sleeve 322 and the third telescopic sleeve 323 are fully telescopic, the puncture needle 22 can be wrapped and the head end of the puncture needle 22 is located inside the third telescopic sleeve 323 and does not contact the protective column 325;

[0052] The current syringe 1 and injection needle 2 are disposable products packaged together, and the protection device 3 and the prying and detaching device 4 in the device can also be directly sleeved on the injection needle 2 for packaging together, and the protection device 3 in this packaging state is in the state of wrapping the injection needle 2. In view of the above, when the medical staff uses the syringe 1, the syringe 1 is first packaged and disassembled, and then the injection needle 2 can be directly connected to the injection port of the syringe 1. Then, the medical staff holds the syringe 1 in the posture of hand injection, and hooks the middle finger and index finger of the hand on the corresponding adjustment block 335, and the thumb is in contact with the head end of the piston rod of the syringe 1. At this time, the middle finger and index finger of the medical staff's hand and the thumb are inward, that is, the middle finger and index finger are in the direction of the thumb, and the thumb is squeezed in the direction of the middle finger and index finger. The two adjustment blocks 335 are subjected to the force to make the third telescopic sleeve 323 move and shrink toward the inside of the second telescopic sleeve 322, and the second telescopic sleeve 322 will move toward the first telescopic sleeve 3 21, at this time, the two springs 332 are in a continuously compressed state, and the two telescopic tubes 333 are also in a corresponding multi-section telescopic state. In the process of the third telescopic sleeve 323 contracting into the second telescopic sleeve 322, the injection needle 2 will pass through the through hole 326 in the middle of the protective column 325 and the through groove 324 at the lower end of the third telescopic sleeve 323 and finally be exposed to the outside. Finally, after the third telescopic sleeve 323 is completely contracted into the second telescopic sleeve 322 and the second telescopic sleeve 322 is completely contracted into the first telescopic sleeve 321, the two limit blocks 334 just move into the corresponding slots 341 and are at the corresponding openings. Then the middle finger and index finger hook the two adjustment blocks 335 and rotate slightly, so that the corresponding limit blocks 334 on the two adjustment blocks 335 move toward the hook-shaped internal direction of the corresponding slots 341 respectively. After the movement is completed, the two limit blocks 334 will be hooked in the corresponding slots 341. At this time, the two springs 332 are in a compressed state. Figure 1 , Figure 2 and Figure 5 As shown, the injection needle 2 has been fully exposed to the outside, and medical staff can extract medicine through the syringe 1 to perform puncture drug injection treatment or sprint blood extraction with the injection needle 2. The protection device 3 in a completely contracted state will not cause any obstruction to the treatment process. At this time, the length of the protection device 3 is only longer than one-fourth of the needle sleeve 21.

[0053] Preferably, it also includes a piston cap 5, which can be inserted into the upper end of the protective sleeve 31 to seal the interior thereof;

[0054] Reference Figure 6As shown, after the injection needle 2 is separated from the injection port of the syringe 1, since the protective cover 31 is sleeved on the injection needle 2, the protective cover 31 is always sleeved on the injection needle 2 after the injection needle 2 is separated. At this time, the piston cap 5 is inserted from the upper end of the protective cover 31 to seal the inside and can be discarded, thereby achieving a sealing effect, preventing bacteria from volatilizing into the air, and greatly reducing the risk of bacterial volatilization infection after the injection needle 2 is used.

[0055] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A self-destructive protection device for a syringe needle, comprising a syringe (1) and an injection needle (2), characterized in that ； It also includes a protective device (3) for wrapping the injection needle (2) to protect it; A prying and detaching device (4) for conveniently detaching the injection needle (2) from the syringe (1); The syringe (1) and the injection needle (2) are matched to each other, the injection needle (2) comprises a needle sleeve (21) and a puncture needle (22), the needle sleeve (21) is sleeved at the injection port of the syringe (1), and the protection device (3) comprises a protection sleeve (31), a telescopic sleeve (32), a self-elastic telescopic component (33) and a limiting sleeve (34); The protective sleeve (31) is sleeved on the needle sleeve (21); the telescopic sleeve (32) is telescopically arranged and connected to the protective sleeve (31); the self-elastic telescopic component (33) is arranged on the telescopic sleeve (32) and can provide a telescopic driving force for the telescopic sleeve (32); the limiting sleeve (34) is arranged on the telescopic sleeve (32) to limit the self-elastic telescopic component (33); and the prying and disengaging device (4) is arranged on the protective sleeve (31).

2. A self-destructive protection device for a syringe needle according to claim 1, characterized in that: The upper end of the protective sleeve (31) is trumpet-shaped. After the protective sleeve (31) is completely sleeved on the needle sleeve (21), the trumpet-shaped position of the upper end of the protective sleeve (31) is in contact with the lower end of the syringe (1).

3. A self-destructive protection device for a syringe needle according to claim 1, characterized in that: The telescopic sleeve (32) comprises a first telescopic sleeve (321), a second telescopic sleeve (322) and a third telescopic sleeve (323); the length of the first telescopic sleeve (321) is greater than that of the second telescopic sleeve (322); the length of the second telescopic sleeve (322) is greater than that of the third telescopic sleeve (323); the first telescopic sleeve (321) is connected to the protective sleeve (31); the second telescopic sleeve (322) is arranged inside the first telescopic sleeve (321) and is in a rotatable and telescopic matching state; the third telescopic sleeve (323) is arranged inside the second telescopic sleeve (322) and is in a rotatable and telescopic matching state; the first telescopic sleeve (321), the second telescopic sleeve (322) and the third telescopic sleeve (323) are all plastic transparent tubes.

4. A self-destructive protection device for a syringe needle according to claim 3, characterized in that: The self-elastic telescopic component (33) comprises a fixed ring (331), a spring (332), a telescopic tube (333), a limit block (334) and an adjustment block (335); the fixed ring (331) is arranged outside the first telescopic sleeve (321); two adjustment blocks (335) are provided, and the two adjustment blocks (335) are symmetrically arranged and located at the outer end of the third telescopic sleeve (323); two springs (332) are provided, and one end of the two springs (332) is respectively connected to the fixed ring (331) and the other end is respectively connected to the corresponding adjustment block (3 35), two limit blocks (334) are provided, the two limit blocks (334) are respectively arranged on the corresponding adjustment blocks (335), the two limit blocks (334) are both arranged in an inverted L shape, two telescopic tubes (333) are provided, the upper ends of the two telescopic tubes (333) are respectively connected to the fixed ring (331) and the lower ends are respectively connected to the corresponding adjustment blocks (335), the two telescopic tubes (333) wrap the corresponding springs (332) and are in a non-contact state, and the two telescopic tubes (333) are both multi-section telescopic tubes (333).

5. A self-destructive protection device for a syringe needle according to claim 1, characterized in that: The limiting sleeve (34) is arranged in a circular ring shape, and two slots (341) are symmetrically arranged on the limiting sleeve (34) and are adapted to the two limiting blocks (334) and limit the two limiting blocks (334). The openings of the two slots (341) are both arranged in a straight shape and the inside is arranged in a hook shape.

6. A self-destructive protection device for a syringe needle according to claim 1, characterized in that: The prying and disengaging device (4) comprises a connecting block (41), a connecting shaft (42), a prying plate (43) and a torsion spring. The protective sleeve (31) is provided with a prying groove (311). Two connecting blocks (41) are provided. The two connecting blocks (41) are symmetrically arranged outside the protective sleeve (31) and are located close to the prying groove (311). The connecting shaft (42) is arranged on the two connecting blocks (41). The middle part of the prying plate (43) is connected to the connecting shaft (42) through the torsion spring. The upper end of the prying plate (43) is hook-shaped. The upper end of the prying plate (43) passes through the prying groove (311) and is placed on the upper end of the needle sleeve (21).

7. A self-destructive protection device for a syringe needle according to claim 3, characterized in that: The lower end of the third telescopic sleeve (323) is connected to the interior with a through groove (324), and a protective column (325) is provided at the upper end of the internal through groove (324) of the third telescopic sleeve (323). A through hole (326) for the puncture needle (22) to pass through is provided in the middle of the protective column (325). The center position of the protective column (325) corresponds to the center position of the puncture needle (22). The through hole (326) is also arranged in an inverted trapezoidal shape. The protective column (325) is made of rubber and has a certain tension. When the puncture needle (22) passes halfway through the through hole (326) or does not pass through, the lower end of the through hole (326) is in a closed state.

8. A self-destructive protection device for a syringe needle according to claim 3, characterized in that: After the second telescopic sleeve (322) and the third telescopic sleeve (323) are fully telescopic, the puncture needle (22) can be wrapped and the head end of the puncture needle (22) is located inside the third telescopic sleeve (323) and does not contact the protective column (325).

9. A self-destructive protection device for a syringe needle according to claim 1, characterized in that: It also comprises a piston cover cap (5), and the piston cover cap (5) can be inserted into the upper end of the protective sleeve (31) to seal the interior thereof.

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