Self-destruction peripheral blood taking needle

Abstract

The invention provides a self-destruction type tip blood taking needle and relates to the technical field of blood taking equipment, the self-destruction type tip blood taking needle comprises a shell, an upper cover, a needle seat, a spring and an excitation piece, the needle seat, the spring and the excitation piece are arranged in the shell, the upper cover is arranged at the supporting end of the shell, a blood taking needle of the needle seat faces the blood taking end of the shell, and a buckle on the side wall of the needle seat is clamped with a clamping block on the inner wall of the shell; one end of the spring is connected with a base of the needle seat, the other end of the spring is connected with the upper cover, the excitation part is used for sliding towards one end close to the upper cover to release clamping between the buckle and the clamping block, and the spring is used for ejecting the blood taking needle out of the shell and stretching the blood taking needle after clamping between the buckle and the clamping block is released. And the shielding self-destruction device is also used for changing from a stretching state to a normal length so as to retract the needle seat and the blood taking needle, so that the self-destruction peripheral blood taking needle is switched from a blood taking state to a shielding self-destruction state. According to the invention, the fear of a patient can be avoided, the phenomena of accidental injury, accidental stabbing, blood infection and repeated use of the needle head are avoided, and no safety risk exists.

Description

Technical Field

[0001] The present invention relates to the technical field of blood collection equipment, in particular to a self-destructive distal blood collection needle. Background Art

[0002] A peripheral blood collection needle is a medical device used to collect peripheral blood samples from the human body. It is usually used for micro-blood collection from fingertips, earlobes and other parts of the body. It is suitable for clinical testing projects such as blood sugar monitoring, blood routine, and newborn screening.

[0003] In the related art, most peripheral blood collection needles consist of a stainless steel needle, a needle handle, and a protective cap. When in use, the protective cap must be unscrewed to expose the needle, and then blood is collected by manually pressing. However, since the peripheral blood collection needle consists only of a stainless steel needle, a needle handle, and a protective cap, the needle is exposed after the protective cap is unscrewed and blood is collected. This can easily cause fear in patients and can also easily lead to accidental injuries, mispunctures, and blood infections. Moreover, for users who lack medical knowledge, there is a possibility of reusing the needle, which poses a serious safety risk. In addition, manual pressing of blood collection is difficult to control the force, affecting the blood collection effect. Summary of the Invention

[0004] The present invention aims to solve at least one of the above problems.

[0005] In order to solve the above problems, the present invention provides a self-destructive distal blood collection needle, comprising a shell, an upper cover, a needle seat, a spring and an excitation member arranged in the shell, the upper cover is arranged at the supporting end of the shell, the blood collection needle of the needle seat faces the blood collection end of the shell, the buckle of the side wall of the needle seat is elastically engaged with the block on the inner wall of the shell, so that the spring is pressed between the needle seat and the upper cover, and one end of the spring is connected to the base of the needle seat, and the other end is connected to the upper cover; the excitation member is arranged along the extension direction of the shell at the The trigger member is used to slide toward one end close to the upper cover to release the engagement between the buckle and the card block, and the spring is used to eject the lancet from the outer shell and be stretched after the engagement between the buckle and the card block is released, so that the self-destructive terminal lancet switches from the initial state to the blood collection state and then enters the shielded self-destructive state; the spring is also used to change from the stretched state to a normal length to retract the needle seat and the lancet, so that the self-destructive terminal lancet switches from the blood collection state to the shielded self-destructive state.

[0006] Optionally, the excitation member includes a first pressing portion and a first release portion, the first pressing portion is arranged at the blood collection end of the shell, and the first release portion is arranged inside the shell, and in the initial state, the first release portion and the card block are combined to form a first limiting groove, and the buckle is placed in the first limiting groove. In the blood collection state, the first release portion moves in a direction close to the upper cover to disengage the buckle from the first limiting groove.

[0007] Optionally, the upper cover includes an elastic rib and an upper cover fixing seat, the upper cover fixing seat is arranged at the supporting end of the outer shell, and the elastic rib is arranged on the upper cover fixing seat. In the blood collection state, the elastic rib is constructed to abut against the end of the first release part away from the first pressing part, and the elastic rib is in a compressed state. In the shield self-destruction state, the elastic rib is in a rebound state.

[0008] Optionally, the first pressing part includes a first pressing shell and a first sliding clip, the first pressing shell is adapted to the blood collection end of the shell, and the first pressing shell is provided with a through hole adapted to the blood collection needle along its axial direction, the first sliding clip is provided on the side wall of the first pressing shell close to one end of the first release part, and the inner wall of the shell is provided with a first sliding groove adapted to the first sliding clip, in the initial state and the shielding self-destruction state, the first sliding clip is configured to be engaged with one end of the first sliding groove close to the blood collection end of the shell, and in the process of switching from the initial state to the blood collection state, the first sliding clip is configured to slide along the first sliding groove toward the support end of the shell.

[0009] Optionally, the card block extends from the inner wall of the shell toward the direction close to the buckle and is engaged with the buckle, the excitation member includes a second pressing portion and a second release portion, the second pressing portion is provided at the blood collection end of the shell, the second release portion is provided inside the shell, and the side wall of the needle seat is provided with a second slide groove that passes through the buckle. In the process of switching from the initial state to the blood collection state, the second release portion is configured to slide in the second slide groove in the direction close to the upper cover and squeeze the card block in the direction away from the buckle to disconnect the buckle from the card block.

[0010] Optionally, the second pressing part includes a second pressing shell and a second sliding clip, the second pressing shell is adapted to the blood collection end of the shell, and the second pressing shell is provided with a through hole adapted to the blood collection needle along its axial direction, the second sliding clip is provided on the side wall of the second pressing shell close to one end of the second limit release part, and the inner wall of the shell is provided with a third sliding groove adapted to the second sliding clip, in the initial state and the shielding self-destruction state, the second sliding clip is configured to be engaged with one end of the third sliding groove close to the blood collection end of the shell, and in the blood collection state, the second sliding clip is configured to slide along the third sliding groove toward the support end of the shell.

[0011] Optionally, the excitation member is adapted to the supporting end of the shell, and the excitation member is sleeved on the upper cover, the upper cover and the excitation member slide in the shell along the direction close to the buckle, and when moving along the direction close to the buckle, they enter the blood collection state from the initial state, disconnecting the buckle from the card block.

[0012] Optionally, the buckle extends from the side wall of the needle seat toward the inner wall of the shell and is engaged with the card block. The excitation member includes a third pressing portion and a third release portion. The third pressing portion is connected to the end of the upper cover away from the buckle. The third release portion is arranged on two opposite sides of the upper cover, and in the process of switching from the initial state to the blood collection state, the third release portion is configured to slide in the shell along the direction close to the buckle and squeeze the buckle toward the side wall of the needle seat to disconnect the buckle from the card block.

[0013] Optionally, the inner wall of the shell and the third limit release part in the same direction is provided with a first card slot and a second card slot in sequence, and the first card slot is close to the third pressing part, and the second card slot is away from the third pressing part, and the end of the third limit release part away from the third pressing part is provided with a limit buckle adapted to the first card slot and the second card slot. In the initial state, the limit buckle is configured to be engaged with the first card slot, and in the blood collection state and the shielding self-destruction state, the limit buckle is configured to be engaged with the second card slot.

[0014] Optionally, the needle seat further includes a needle protection handle, and the needle protection handle is sleeved on the blood collection needle.

[0015] The beneficial effects of the self-destructive distal blood collection needle of the present invention are:

[0016] By arranging the needle seat inside the shell, the blood collection needle can be hidden, the patient will not see the blood collection needle, will not cause fear to the patient, and can avoid accidental injury or accidental puncture. By pressing a spring between the needle seat and the upper cover, and when the trigger member slides in the direction close to the upper cover from the initial state to the blood collection state, the connection between the buckle and the block is disconnected, so that the spring is converted from a compressed state to a stretched state, releasing elastic potential energy, and thus releasing the needle seat and the blood collection needle under the action of the spring force, and the blood collection needle is ejected from the shell, which can realize automatic blood collection, avoids the problem of manual press-type blood collection that is difficult to control the force, and improves the blood collection effect. Moreover, after the spring ejects the blood collection needle from the shell, the spring is in a stretched state and has a tendency to retract from the stretched state to a normal state, so that the blood collection needle can be pulled back into the shell, further avoiding accidental injury or accidental puncture. At the same time, after the blood collection needle is pulled back into the shell, the spring and the trigger member will no longer work, that is, the device self-destructs, making the blood collection needle unable to be reused, avoiding blood infection and reuse of needles, and there is no corresponding safety risk. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of a self-destructive peripheral blood collection needle provided by one embodiment of the present invention;

[0018] Figure 2 The second structural diagram of the self-destructive distal blood collection needle provided by one embodiment of the present invention;

[0019] Figure 3 A schematic structural diagram of a self-destructive distal blood collection needle with its outer shell removed provided by one embodiment of the present invention;

[0020] Figure 4 A schematic structural diagram of a first limiting groove of a self-destructive distal blood collection needle provided by one embodiment of the present invention;

[0021] Figure 5 A schematic diagram of the structure of a self-destructive peripheral blood collection needle provided by one embodiment of the present invention entering a blood collection state from an initial state;

[0022] Figure 6 A schematic structural diagram of a self-destructive peripheral blood collection needle in a blood collection state according to an embodiment of the present invention;

[0023] Figure 7 A schematic structural diagram of a self-destructive peripheral blood collection needle shielded in a self-destructive state according to an embodiment of the present invention;

[0024] Figure 8 This is a schematic diagram of the structure of a self-destructive peripheral blood collection needle provided by another embodiment of the present invention;

[0025] Figure 9 A second structural diagram of a self-destructive distal blood collection needle provided by another embodiment of the present invention;

[0026] Figure 10 A schematic structural diagram of a self-destructive distal blood collection needle with its outer shell removed provided by another embodiment of the present invention;

[0027] Figure 11 A schematic structural diagram of a self-destructive peripheral blood collection needle in a blood collection state provided by another embodiment of the present invention;

[0028] Figure 12 A schematic structural diagram of a self-destructive peripheral blood collection needle in a shielded self-destruct state provided by another embodiment of the present invention;

[0029] Figure 13 A schematic structural diagram of a self-destructive distal blood collection needle provided by yet another embodiment of the present invention;

[0030] Figure 14 A schematic structural diagram of an initial state of a self-destructive peripheral blood collection needle provided by another embodiment of the present invention;

[0031] Figure 15 A schematic structural diagram of a self-destructive peripheral blood collection needle provided by another embodiment of the present invention entering a blood collection state from an initial state;

[0032] Figure 16 A schematic structural diagram of a self-destructive peripheral blood collection needle in a blood collection state according to another embodiment of the present invention;

[0033] Figure 17 This is a structural diagram of a self-destructive peripheral blood collection needle in a shielded self-destructive state provided by another embodiment of the present invention.

[0034] Description of reference numerals:

[0035] 1. Shell; 11. Block; 12. First slide groove; 13. Third slide groove; 14. First slot; 15. Second slot; 2. Upper cover; 21. Elastic rib; 22. Upper cover fixing seat; 3. Needle seat; 31. Buckle; 32. Blood collection needle; 33. Second slide groove; 34. Needle protection handle; 4. Spring; 5. Trigger; 51. First pressing part; 511. First pressing shell; 512. First sliding buckle; 52. First release part; 53. Second pressing part; 531. Second pressing shell; 532. Second sliding buckle; 54. Second release part; 55. Third pressing part; 56. Third release part; 561. Limit buckle. DETAILED DESCRIPTION

[0036] To make the above-mentioned objects, features, and advantages of the present invention more clearly understood, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. Although certain embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be construed as being limited to the embodiments described herein. Instead, these embodiments are provided to provide a more thorough and complete understanding of the present invention. It should be understood that the drawings and embodiments of the present invention are for illustrative purposes only and are not intended to limit the scope of protection of the present invention.

[0037] The term "including" and its variations used in this document are open inclusions, that is, "including but not limited to"; the term "based on" means "based at least in part on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one other embodiment"; the term "some embodiments" means "at least some embodiments"; the term "optionally" means "optional embodiments". The relevant definitions of other terms will be given in the following description. It should be noted that the concepts of "first", "second", etc. mentioned in the present invention are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0038] It should be noted that the modifications of "one" and "multiple" mentioned in the present invention are illustrative rather than restrictive. Those skilled in the art should understand that unless otherwise clearly indicated in the context, it should be understood as "one or more".

[0039] In view of the problems existing in the above-mentioned related technologies, such as Figure 1 As shown, an embodiment of the present invention provides a self-destructive peripheral blood collection needle, comprising a shell 1, an upper cover 2, a needle seat 3, a spring 4 and an excitation member 5 arranged in the shell 1, the upper cover 2 is arranged at the supporting end of the shell 1, the blood collection needle 32 of the needle seat 3 faces the blood collection end of the shell 1, the buckle 31 of the side wall of the needle seat 3 is elastically engaged with the block 11 on the inner wall of the shell 1, so that the spring 4 is pressed between the needle seat 3 and the upper cover 2, and one end of the spring 4 is connected to the base of the needle seat 3, and the other end is connected to the upper cover 2; the excitation member 5 extends along the shell 1. The trigger member 5 is used to slide toward one end close to the upper cover 2 to release the engagement between the buckle 31 and the block 11, and the spring 4 is used to eject the blood collection needle 32 from the housing 1 and be stretched after the buckle 31 and the block 11 are released, so that the self-destructive peripheral blood collection needle switches from the initial state to the blood collection state and then enters the shielded self-destructive state; the spring 4 is also used to change from the stretched state to the normal length to retract the needle seat 3 and the blood collection needle 32, so that the self-destructive peripheral blood collection needle switches from the blood collection state to the shielded self-destructive state.

[0040] Specifically, the outer shell 1 is cylindrical and has a blood collection end and a support end. The blood collection end is provided with an opening for the blood collection needle 32 to pass through, and the support end is provided with an opening for the upper cover 2 to be installed. The upper cover 2 is snap-connected to the support end of the outer shell 1. The inner wall of the outer shell 1 is provided with a clamping block 11, which protrudes inward from the inner wall of the outer shell 1 and is used to clamp with the clamp 31 on the side wall of the needle seat 3. The needle seat 3 includes a base and a blood collection needle 32. The base is cylindrical and adapts to the inner cavity of the outer shell 1. The side wall of the base is provided with a clamp 31, which protrudes outward and is used to clamp with the clamp 11 on the inner wall of the outer shell 1. The blood collection needle 32 is fixed to the front end of the base, facing the blood collection end of the outer shell 1. Spring 4 is a compression spring, one end of which is connected to the base of the needle holder 3 and the other end to the upper cover 2. The sum of the normal length of spring 4 and the length of the needle holder 3 is less than the length of the housing 1 in the blood collection direction. This ensures that when the shielded self-destruction state is in effect, the lancet 32 can be fully retracted into the housing 1, preventing accidental injury caused by needle exposure. The elastic force of spring 4 has been precisely calculated to provide both sufficient thrust to extend the lancet 32 from the housing 1 during blood collection and sufficient pullback force to retract the needle holder 3 and lancet 32, retracting the lancet 32 into the housing 1 to achieve the shielded self-destruction state. The trigger 5 slides within the housing 1 along the extension direction of the housing 1, sliding toward the end closest to the upper cover 2 to release the latch 31 from the latch block 11, disconnecting the latch 31 from the latch block 11. Under the action of spring 4, the lancet 32 is then pushed out of the housing 1.

[0041] Exemplarily, the housing 1 is made of a transparent or translucent medical-grade plastic material, allowing for easy observation of the internal structure during operation. The needle hub 3 is approximately one-third to one-half the length of the housing 1, ensuring that the lancet 32 can properly extend from the blood collection end of the housing 1 during blood collection and fully retract into the housing 1 during shield self-destruction.

[0042] In this embodiment, the blood collection needle 32 can be hidden by arranging the needle seat 3 inside the shell 1, and the patient will not see the blood collection needle 32, which will not cause fear to the patient and can avoid accidental injury or puncture. A spring 4 is pressed between the needle seat 3 and the upper cover 2, and when the triggering member 5 slides in the direction close to the buckle 31 from the initial state to the blood collection state, the connection between the buckle 31 and the block 11 is disconnected, so that the spring 4 is converted from the compressed state to the extended state, releasing elastic potential energy, thereby releasing the needle seat 3 and the blood collection needle 32 under the elastic force of the spring 4, and the blood collection needle 32 is ejected from the shell 1, which can realize automatic blood collection and avoid the difficulty of manual pressing blood collection. The blood collection effect is improved by controlling the force. Moreover, since the sum of the normal length of the spring 4 and the length of the needle seat 3 is less than the length of the shell 1 in the blood collection direction, after the spring 4 pops the blood collection needle 32 out of the shell 1, the spring 4 is in a stretched state and has a tendency to retract from the stretched state to the normal state, so that the blood collection needle 32 can be pulled back into the shell 1, further avoiding accidental injury or puncture. At the same time, after the blood collection needle 32 is pulled back into the shell 1, the spring 4 and the excitation member 5 will no longer work, that is, the device self-destructs, making the blood collection needle 32 unable to be reused, avoiding blood infection and reuse of needles, and there is no corresponding safety risk.

[0043] Alternatively, in one embodiment of the present invention, Figure 2 and Figure 3 As shown, the excitation member 5 includes a first pressing portion 51 and a first limiting portion 52. The first pressing portion 51 is provided at the blood collection end of the shell 1, and the first limiting portion 52 is provided inside the shell 1. In the initial state, the first limiting portion 52 and the card block 11 are combined to form a first limiting groove, and the buckle 31 is placed in the first limiting groove. In the blood collection state, the first limiting portion 52 moves in a direction close to the upper cover 2 to disengage the buckle 31 from the first limiting groove.

[0044] Specifically, the trigger member 5 includes a first pressing portion 51 and a first release portion 52. The first pressing portion is disc-shaped and is adapted to the blood collection end of the shell 1. The first pressing portion 51 is provided at the blood collection end of the shell 1, and in the initial state, the first pressing portion 51 partially protrudes from the shell 1 to facilitate the pressing operation. The first release portion 52 is cylindrical and adapted to the inner cavity of the shell 1. One end of the first release portion 52 is connected to the first pressing portion 51, and the other end extends toward the upper cover 2. Figure 4As shown, the first release limit portion 52 cooperates with the card block 11 left and right, and the right side wall of the first release limit portion 52 cooperates with the left side wall of the card block 11, or the left side wall of the first release limit portion 52 cooperates with the right side wall of the card block 11, and the first release limit portion 52 is provided with a groove at the connection with the card block 11, so that the groove and the side wall of the card block 11 form a first limiting groove, or the card block 11 is provided with a groove at the connection with the first release limit portion 52, so that the groove and the side wall of the first release limit portion 52 form a first limiting groove, and the notch of the first limiting groove faces the needle seat 3, for accommodating the buckle 31 of the side wall of the needle seat 3, and as shown Figure 2 and Figure 3 As shown, the buckle 31 abuts against the groove wall of the first limiting groove toward the blood collection end, thereby limiting the displacement of the buckle 31 in the direction close to the blood collection end in the initial state. In the initial state, the buckle 31 is placed in the first limiting groove. When entering the blood collection state, as shown in FIG. Figure 5 As shown, the first release limit portion 52 moves in the direction close to the upper cover 2 to release the first limiting groove formed by the block 11, thereby allowing the buckle 31 to disengage from the first limiting groove. Then, the buckle 31 moves along the first release limit portion 52 and the side wall of the block 11 toward the direction close to the blood collection end under the action of the spring 4, as shown in FIG. Figure 6 As shown, the blood collection needle 32 extends out of the housing 1 under the action of the spring 4.

[0045] Alternatively, in one embodiment of the present invention, Figure 3 and Figure 7 As shown, the upper cover 2 includes an elastic rib 21 and an upper cover fixing seat 22. The upper cover fixing seat 22 is arranged at the supporting end of the outer shell 1, and the elastic rib 21 is arranged on the upper cover fixing seat 22. In the blood collection state, the elastic rib 21 is constructed to abut against the end of the first release portion 52 away from the first pressing portion 51, and the elastic rib 21 is in a compressed state. In the shielding self-destruction state, the elastic rib 21 is in a rebound state.

[0046] Specifically, the upper cover 2 includes an elastic rib 21 and an upper cover fixing seat 22. The upper cover fixing seat 22 is disc-shaped and is adapted to the support end of the housing 1. The elastic rib 21 is made of an elastic material, with one end fixed to the upper cover fixing seat 22 and the other end extending toward the first limit release portion 52. In the blood collection state, the elastic rib 21 is constructed to abut against the end of the first limit release portion 52 away from the first pressing portion 51, and the elastic rib 21 is in a compressed state. In the shielding self-destruction state, the elastic rib 21 is in a rebound state. For example, the elastic coefficient of the elastic rib 21 is precisely calculated to ensure that it can be compressed by the first limit release portion 52 in the blood collection state and can rebound in the shielding self-destruction state, assisting the trigger member 5 to return to its initial position.

[0047] Alternatively, in one embodiment of the present invention, Figure 3 and Figure 5 As shown, the first pressing part 51 includes a first pressing shell 511 and a first sliding buckle 512, the first pressing shell 511 is adapted to the blood collection end of the shell 1, and the first pressing shell 511 is provided with a through hole adapted to the blood collection needle 32 along its axial direction, the first sliding buckle 512 is provided on the side wall of the first pressing shell 511 close to one end of the first limit release part 52, and the inner wall of the shell 1 is provided with a first slide groove 12 adapted to the first sliding buckle 512, in the initial state and the shielding self-destruction state, the first sliding buckle 512 is configured to be engaged with one end of the first slide groove 12 close to the blood collection end of the shell 1, and in the process of switching from the initial state to the blood collection state, the first sliding buckle 512 is configured to slide along the first slide groove 12 toward the direction close to the support end of the shell 1.

[0048] Specifically, the first pressing portion 51 includes a first pressing shell 511 and a first sliding buckle 512. The first pressing shell 511 is adapted to the blood collection end of the shell 1, and the first pressing shell 511 is provided with a through hole adapted to the blood collection needle 32 along its axial direction, so that the blood collection needle 32 passes through and completes blood collection. The first sliding buckle 512 is provided on the side wall of the first pressing shell 511 close to one end of the first release portion 52. The inner wall of the shell 1 is provided with a first sliding groove 12 adapted to the first sliding buckle 512. In the initial state and the shielding self-destruction state, the first sliding buckle 512 It is configured to be engaged with one end of the first slide groove 12 close to the blood collection end of the shell 1 to limit the movement of the excitation member 5 along the shell, on the one hand to prevent the excitation member 5 from being triggered by mistake, and on the other hand to prevent the excitation member 5 from falling off from the shell; in the process of switching from the initial state to the blood collection state, by pressing the first pressing part 51, the first sliding buckle 512 can be released from the engaged state and slide along the first slide groove 12 toward the support end close to the shell 1, so that the first release part 52 moves in the direction close to the upper cover 2, thereby disengaging the buckle 31 from the first limiting groove, thereby triggering the blood collection operation.

[0049] In this embodiment, the working process of the self-destructive peripheral blood collection needle includes three stages: initial state, blood collection state and shielding self-destruction state.

[0050] In the initial state, if Figure 2 As shown, the buckle 31 on the side wall of the needle seat 3 is engaged with the block 11 on the inner wall of the shell 1, the spring 4 is in a compressed state, the first release portion 52 and the block 11 are combined to form a first limiting groove, the buckle 31 is placed in the first limiting groove, and the first sliding buckle 512 is engaged with the end of the first slide groove 12 close to the blood collection end of the shell 1. When a blood collection operation is required, as shown in FIG. Figure 5As shown, the user presses the first pressing portion 51, causing the first pressing portion 51 and the first release portion 52 to move in a direction close to the upper cover 2. The first sliding buckle 512 slides along the first slide groove 12 toward the support end of the housing 1, and the first release portion 52 moves in a direction close to the upper cover 2, causing the buckle 31 to disengage from the first limiting groove. At the same time, the end of the first release portion 52 away from the first pressing portion 51 abuts against the elastic rib 21, causing the elastic rib 21 to be in a compressed state. At this time, as shown in FIG. Figure 6 As shown, the buckle 31 releases the restriction, and the elastic force of the spring 4 can push the needle seat 3 to move toward the blood collection end of the housing 1, so that the blood collection needle 32 extends out of the blood collection end of the housing 1. At the same time, the spring 4 is stretched and enters the blood collection state. In addition, since the sum of the normal length of the spring 4 and the length of the needle seat 3 is less than the length of the housing 1 in the blood collection direction, after the blood collection is completed, the elastic force of the stretched spring 4 can automatically retract the needle seat 3 and the blood collection needle 32 into the interior of the housing 1, thereby entering the shielded self-destruction state. In addition, after the blood collection is completed, as shown in FIG. Figure 7 As shown, when the user releases the first pressing portion 51, the elastic rib 21 rebounds, pushing the first release portion 52 and the first pressing portion 51 toward the blood collection end of the housing 1, causing the trigger member 5 to return to its initial state. At this point, the first sliding latch 512 reengages with the end of the first chute 12 near the blood collection end of the housing 1, preventing the first release portion 52 and the first pressing portion 51 from sliding out of the housing 1. At this point, the needle holder 3 and spring 4 cannot be reset, preventing a second use, thus achieving a single-use self-destruct function.

[0051] Alternatively, in another embodiment of the present invention, Figures 8 to 10 As shown, the card block 11 extends from the inner wall of the shell 1 toward the direction close to the buckle 31 and is engaged with the buckle 31. The excitation member 5 includes a second pressing portion 53 and a second release portion 54. The second pressing portion 53 is provided at the blood collection end of the shell 1, and the second release portion 54 is provided inside the shell 1. The side wall of the needle seat 3 is provided with a second slide groove 33 that passes through the buckle 31. In the process of switching from the initial state to the blood collection state, the second release portion 54 is configured to slide in the second slide groove 33 in the direction close to the upper cover 2 and squeeze the card block 11 in the direction away from the buckle 31 to disconnect the buckle 31 from the card block 11.

[0052] Specifically, the latch block 11 extends from the inner wall of the housing 1 toward the latch 31 and engages with the latch 31. The trigger member 5 includes a second pressing portion 53 and a second release portion 54. The second pressing portion 53 is disposed at the blood collection end of the housing 1 and is disposed within the housing 1. A second slot 33 is defined on the sidewall of the needle hub 3, extending through the latch 31. The second pressing portion 53 is disc-shaped and fits within the blood collection end of the housing 1. The second release portion 54 is strip-shaped, with one end connected to the second pressing portion 53 and the other end inserted into the second slot 33. The thickness of the second release portion 54 gradually increases as it approaches the second pressing portion 53. The length of the second release portion 54 is sufficient to reach the latch block 11 during the blood collection state. Therefore, during the transition from the initial state to the blood collection state, the second release portion 54 slides within the second slot 33 toward the upper cover 2, thereby squeezing the latch block 11 away from the latch 31. Exemplarily, the width of the second slide groove 33 is slightly larger than the width of the second release portion 54, and the length is approximately one-third to one-half of the length of the needle seat 3, so that the second release portion 54 can slide smoothly and squeeze the block 11 away from the buckle 31 to disconnect the connection between the buckle 31 and the block 11.

[0053] Optionally, in another embodiment of the present invention, the second pressing portion 53 includes a second pressing shell 531 and a second sliding buckle 532, the second pressing shell 531 is adapted to the blood collection end of the shell 1, and the second pressing shell 531 is provided with a through hole adapted to the blood collection needle 32 along its axial direction, the second sliding buckle 532 is provided on the side wall of the second pressing shell 531 close to one end of the second limit release portion 54, and the inner wall of the shell 1 is provided with a third slide groove 13 adapted to the second sliding buckle 532, in the initial state and the shielding self-destruction state, the second sliding buckle 532 is configured to be engaged with one end of the third slide groove 13 close to the blood collection end of the shell 1, and in the blood collection state, the second sliding buckle 532 is configured to slide along the third slide groove 13 toward the support end close to the shell 1.

[0054] Specifically, in another embodiment of the present invention, the second pressing portion 53 includes a second pressing shell 531 and a second sliding buckle 532. The second pressing shell 531 is adapted to the blood collection end of the shell 1, and the second pressing shell 531 is provided with a through hole adapted to the blood collection needle 32 along its axial direction so that the blood collection needle 32 can pass through. The second sliding buckle 532 is provided on the side wall of the second pressing shell 531 near one end of the second release portion 54. The inner wall of the shell 1 is provided with a third sliding groove 13 adapted to the second sliding buckle 532. In the initial state and the shielding self-destruction state, as shown in FIG. Figure 8 and Figure 12As shown, the second sliding buckle 532 is configured to engage with one end of the third slide groove 13 close to the blood collection end of the shell 1. In the blood collection state, the second sliding buckle 532 is configured to slide along the third slide groove 13 toward the support end close to the shell 1.

[0055] In this embodiment, the working process of the self-destructive peripheral blood collection needle includes three stages: initial state, blood collection state and shielding self-destruction state.

[0056] In the initial state, if Figure 8 and Figure 10 As shown, the buckle 31 on the side wall of the needle seat 3 is engaged with the block 11 on the inner wall of the housing 1, the spring 4 is in a compressed state, the second release portion 54 is located in the second slide groove 33 but has not reached the block 11, and the second sliding buckle 532 is engaged with the end of the third slide groove 13 close to the blood collection end of the housing. When a blood collection operation is required, as shown in FIG. Figure 11 As shown, the user presses the second pressing portion 53, causing the second pressing portion 53 and the second release portion 54 to move in the direction close to the upper cover 2. The second sliding buckle 532 slides along the third slide groove 13 in the direction close to the support end of the shell 1, and the second release portion 54 slides in the second slide groove 33 in the direction close to the upper cover 2, and squeezes the block 11 in the direction away from the buckle 31, disconnecting the buckle 31 from the block 11. At this time, the elastic force of the spring 4 pushes the needle seat 3 to move toward the blood collection end of the shell 1, and the blood collection needle 32 extends out of the blood collection end of the shell and enters the blood collection state. After the blood collection is completed, as shown Figure 12 As shown, when the user releases the second pressing portion 53, the elastic force of the spring 4 retracts the lancet 32 into the interior of the housing, since the sum of the normal length of the spring 4 and the length of the needle hub 3 is less than the length of the housing 1 in the blood collection direction. At this point, the second sliding catch 532 reengages with the end of the third slot 13 near the blood collection end of the housing 1, preventing the second release portion 53 and the second pressing portion 54 from sliding out of the housing 1. At this point, the needle hub 3 and spring 4 cannot be reset, preventing a second use, thus achieving the self-destruct function of the single-use device.

[0057] Alternatively, in another embodiment of the present invention, Figure 13 and Figure 14 As shown, the excitation member 5 is adapted to the supporting end of the shell 1, and the excitation member 5 is sleeved on the upper cover 2. The upper cover 2 and the excitation member 5 slide in the shell 1 in the direction close to the buckle 31, and when moving in the direction close to the buckle 31, the initial state enters the blood collection state, and the connection between the buckle 31 and the block 11 is disconnected.

[0058] Specifically, the excitation member 5 is adapted to the supporting end of the shell 1, and the excitation member 5 is sleeved on the upper cover 2, that is, the excitation member 5 and the shell 1 are both arranged at the supporting end of the shell 1, and the upper cover 2 and the excitation member 5 slide in the shell 1 along the direction close to the buckle 31, and when moving along the direction close to the buckle 31, they enter the blood collection state from the initial state, disconnecting the buckle 31 from the card block 11.

[0059] Alternatively, in another embodiment of the present invention, Figure 13 and Figure 14 As shown, the buckle 31 extends from the side wall of the needle seat 3 toward the inner wall of the shell 1 and is engaged with the block 11. The excitation member 5 includes a third pressing portion 55 and a third release portion 56. The third pressing portion 55 is connected to the end of the upper cover 2 away from the buckle 31. The third release portion 56 is provided on two opposite sides of the upper cover 2. In the process of switching from the initial state to the blood collection state, the third release portion 56 is configured to slide in the shell 1 in the direction close to the buckle 31 and squeeze the buckle 31 in the direction close to the side wall of the needle seat 3 to disconnect the buckle 31 from the block 11.

[0060] Specifically, the buckle 31 extends from the side wall of the needle seat 3 toward the inner wall of the housing 1 and is engaged with the card block 11. The trigger member 5 includes a third pressing portion 55 and a third release portion 56. The third pressing portion 55 is connected to the end of the upper cover 2 away from the buckle 31. The third release portion 56 is provided on opposite sides of the upper cover 2, and when the initial state is switched to the blood collection state, as shown in FIG. Figure 15 As shown, during the process of switching from the initial state to the blood collection state, the third release portion 56 is configured to slide in the housing 1 in the direction close to the buckle 31 and squeeze the buckle 31 in the direction close to the side wall of the needle seat 3 to disconnect the connection between the buckle 31 and the block 11.

[0061] Alternatively, in another embodiment of the present invention, Figures 13 to 17 As shown, the inner wall of the shell 1 in the same direction as the third release part 56 is provided with a first card slot 14 and a second card slot 15 in sequence, and the first card slot 14 is close to the third pressing part 55, and the second card slot 15 is away from the third pressing part 55. The end of the third release part 56 away from the third pressing part 55 is provided with a limit buckle 561 adapted to the first card slot 14 and the second card slot 15. In the initial state, the limit buckle 561 is configured to be engaged with the first card slot 14. In the blood collection state and the shielding self-destruction state, the limit buckle 561 is configured to be engaged with the second card slot 15.

[0062] Specifically, the inner wall of the shell 1 in the same direction as the third release part 56 is provided with a first card slot 14 and a second card slot 15 in sequence, and the first card slot 14 is close to the third pressing part 55, and the second card slot 15 is away from the third pressing part 55. The end of the third release part 56 away from the third pressing part 55 is provided with a limit buckle 561 adapted to the first card slot 14 and the second card slot 15. In the initial state, the limit buckle 561 is configured to be engaged with the first card slot 14. In the blood collection state and the shielding self-destruction state, the limit buckle 561 is configured to be engaged with the second card slot 15.

[0063] In this embodiment, the working process of the self-destructive peripheral blood collection needle includes three stages: initial state, blood collection state and shielding self-destruction state.

[0064] In the initial state, if Figure 14 As shown, the buckle 31 on the side wall of the needle seat 3 is engaged with the block 11 on the inner wall of the housing 1, the spring 4 is in a compressed state, and the limit buckle 561 is engaged with the first slot 14. When a blood sampling operation is required, Figure 15 As shown, the user presses the third pressing portion 55, so that the third pressing portion 55, the upper cover 2 and the third release portion 56 move in the direction close to the buckle 31. The third release portion 56 presses the buckle 31 in the direction close to the side wall of the needle seat 3, disconnecting the buckle 31 from the block 11. At this time, Figure 16 As shown, the elastic force of the spring 4 pushes the needle seat 3 to move toward the blood collection end of the housing 1, and the blood collection needle 32 extends out of the blood collection end of the housing 1 and enters the blood collection state. At the same time, the limit buckle 561 moves from the first card slot 14 to the second card slot 15 and engages with the second card slot 15. After the blood collection is completed, as shown in FIG. Figure 17 As shown, because the sum of the normal length of spring 4 and the length of needle hub 3 is less than the length of housing 1 in the blood collection direction, the elastic force of spring 4 retracts needle hub 3 and lancet 32 into housing 1, entering a shielded, self-destructing state. At this point, the retaining clip 561 remains engaged with the second retaining slot 15, preventing the third pressing portion 55, upper cover 2, and third release portion 56 from sliding out of housing 1. At this point, the needle hub 3 and spring 4 cannot be reset, preventing a second use, thus achieving a single-use, self-destructing function.

[0065] Optionally, the needle seat 3 further includes a needle protection handle 34 , and the needle protection handle 34 is sleeved on the blood collection needle 32 .

[0066] Specifically, if Figure 3 、 9As shown in Figures 10 and 13, the needle hub 3 also includes a needle protection handle 34, which is mounted on the lancet 32 to protect the lancet 32 before use. When in use, the needle protection handle 34 is unscrewed to enter the initial state. For example, the needle protection handle 34 is cylindrical, with an inner diameter slightly larger than the outer diameter of the lancet 32. The needle protection handle 34 is made of soft medical-grade silicone material. One end is detachably connected to the base of the needle hub 3, and the other end is provided with a handle for easy gripping, so that the needle protection handle 34 can be removed through the handle. The function of the needle protection handle 34 is to protect the needle tip of the lancet 32 when it is not in use, preventing the needle tip from being damaged or contaminated, and also preventing the user from being accidentally pricked by the needle tip.

[0067] Although the present invention is disclosed as above, the protection scope of the present invention is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. A self-destructive peripheral blood collection needle, characterized in that: The invention comprises a shell (1), an upper cover (2), a needle seat (3), a spring (4) and an excitation member (5) arranged in the shell (1), wherein the upper cover (2) is arranged at the supporting end of the shell (1), the blood collection needle (32) of the needle seat (3) faces the blood collection end of the shell (1), the buckle (31) on the side wall of the needle seat (3) is elastically engaged with the block (11) on the inner wall of the shell (1), so that the spring (4) is pressed between the needle seat (3) and the upper cover (2), and one end of the spring (4) is connected to the base of the needle seat (3), and the other end is connected to the upper cover (2); the excitation member (5) is arranged along the extension direction of the shell (1) at the position of the needle seat (3). The trigger member (5) is used to slide toward one end close to the upper cover (2) to release the engagement between the buckle (31) and the block (11); the spring (4) is used to eject the blood collection needle (32) from the housing (1) and be stretched after the buckle (31) and the block (11) are released, so that the self-destructive distal blood collection needle switches from the initial state to the blood collection state and then enters the shielded self-destructive state; the spring (4) is also used to change from the stretched state to the normal length to retract the needle seat (3) and the blood collection needle (32), so that the self-destructive distal blood collection needle switches from the blood collection state to the shielded self-destructive state.

2. The self-destructive distal blood collection needle according to claim 1, characterized in that: The excitation member (5) comprises a first pressing portion (51) and a first release portion (52), wherein the first pressing portion (51) is arranged at the blood collection end of the housing (1), and the first release portion (52) is arranged inside the housing (1), and in the initial state, the first release portion (52) and the clamping block (11) are combined to form a first limiting groove, and the buckle (31) is placed in the first limiting groove. In the blood collection state, the first release portion (52) moves in a direction close to the upper cover (2) to allow the buckle (31) to disengage from the first limiting groove.

3. The self-destructive distal blood collection needle according to claim 2, characterized in that: The upper cover (2) includes an elastic rib (21) and an upper cover fixing seat (22), wherein the upper cover fixing seat (22) is provided at the supporting end of the shell (1), and the elastic rib (21) is provided on the upper cover fixing seat (22). In the blood collection state, the elastic rib (21) is constructed to abut against one end of the first release portion (52) away from the first pressing portion (51), and the elastic rib (21) is in a compressed state. In the shield self-destruction state, the elastic rib (21) is in a rebound state.

4. The self-destructive peripheral blood collection needle according to claim 2, characterized in that: The first pressing portion (51) includes a first pressing shell (511) and a first sliding buckle (512), the first pressing shell (511) is adapted to the blood collection end of the shell (1), and the first pressing shell (511) is provided with a through hole adapted to the blood collection needle (32) along its axial direction, the first sliding buckle (512) is provided on the side wall of the first pressing shell (511) close to one end of the first limit release portion (52), and the inner wall of the shell (1) is provided with a first sliding groove (12) adapted to the first sliding buckle (512), in the initial state and the shielding self-destruction state, the first sliding buckle (512) is configured to be engaged with one end of the first sliding groove (12) close to the blood collection end of the shell (1), and in the process of switching from the initial state to the blood collection state, the first sliding buckle (512) is configured to slide along the first sliding groove (12) toward the support end close to the shell (1).

5. The self-destructive distal blood collection needle according to claim 1, characterized in that: The card block (11) extends from the inner wall of the shell (1) in a direction close to the buckle (31) and is engaged with the buckle (31). The excitation member (5) includes a second pressing portion (53) and a second release portion (54). The second pressing portion (53) is provided at the blood collection end of the shell (1). The second release portion (54) is provided inside the shell (1). The side wall of the needle seat (3) is provided with a second slide groove (33) passing through the buckle (31). In the process of switching from the initial state to the blood collection state, the second release portion (54) is configured to slide in the second slide groove (33) in a direction close to the upper cover (2) and squeeze the card block (11) in a direction away from the buckle (31) to disconnect the buckle (31) from the card block (11).

6. The self-destructive distal blood collection needle according to claim 5, characterized in that: The second pressing portion (53) includes a second pressing shell (531) and a second sliding buckle (532), the second pressing shell (531) is adapted to the blood collection end of the shell (1), and the second pressing shell (531) is provided with a through hole adapted to the blood collection needle (32) along its axial direction, the second sliding buckle (532) is provided on the side wall of the second pressing shell (531) close to one end of the second limit release portion (54), and the inner wall of the shell (1) is provided with a third slide groove (13) adapted to the second sliding buckle (532), in the initial state and the shielding self-destruction state, the second sliding buckle (532) is configured to be engaged with one end of the third slide groove (13) close to the blood collection end of the shell (1), and in the blood collection state, the second sliding buckle (532) is configured to slide along the third slide groove (13) toward the support end close to the shell (1).

7. The self-destructive peripheral blood collection needle according to claim 1, characterized in that: The excitation member (5) is adapted to the supporting end of the housing (1), and the excitation member (5) is sleeved on the upper cover (2). The upper cover (2) and the excitation member (5) slide in the housing (1) in a direction close to the buckle (31), and when moving in a direction close to the buckle (31), the excitation member (5) enters a blood sampling state from an initial state, disconnecting the buckle (31) from the card block (11).

8. The self-destructive distal blood collection needle according to claim 7, characterized in that: The buckle (31) extends from the side wall of the needle seat (3) toward the inner wall of the shell (1) and is engaged with the card block (11). The excitation member (5) includes a third pressing portion (55) and a third release portion (56). The third pressing portion (55) is connected to an end of the upper cover (2) away from the buckle (31). The third release portion (56) is provided on two opposite sides of the upper cover (2). In the process of switching from the initial state to the blood collection state, the third release portion (56) is configured to slide in the shell (1) in a direction close to the buckle (31) and squeeze the buckle (31) in a direction close to the side wall of the needle seat (3) to disconnect the buckle (31) from the card block (11).

9. The self-destructive distal blood collection needle according to claim 8, characterized in that: The inner wall of the shell (1) and the third release portion (56) in the same direction is provided with a first card slot (14) and a second card slot (15) in sequence, and the first card slot (14) is close to the third pressing portion (55), and the second card slot (15) is away from the third pressing portion (55). One end of the third release portion (56) away from the third pressing portion (55) is provided with a limit buckle (561) adapted to the first card slot (14) and the second card slot (15). In the initial state, the limit buckle (561) is configured to be engaged with the first card slot (14). In the blood collection state and the shielding self-destruction state, the limit buckle (561) is configured to be engaged with the second card slot (15).

10. The self-destructive peripheral blood collection needle according to claim 1, characterized in that: The needle seat (3) further comprises a needle protection handle (34), and the needle protection handle (34) is sleeved on the blood collection needle (32).

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