Disposable retracting type anti-needle-sticking venous blood collector

Abstract

The utility model discloses one -off retraction type prevents needle stick phlebotomy instrument, including outer sleeve, inner card core, the inner card core slide card is established in the outer sleeve, the inner card core front end connection needle head, the inner card core rear end sealed connection blood taking tube, the outer sleeve is provided with first clamping mechanism, second clamping mechanism, when the first clamping mechanism of inner card core and outer sleeve clamping, the needle head projects the outer sleeve, when the second clamping mechanism of inner card core and outer sleeve clamping, the needle head retracts the outer sleeve, the inner card core and outer sleeve between setting forced retraction mechanism, when the first clamping mechanism of inner card core and releasing clamping, the forced retraction mechanism will inner card core remove to second clamping mechanism, the utility model discloses after the first clamping mechanism of inner card core and releasing clamping, through forced retraction mechanism will inner card core remove to second clamping mechanism, make needle head retract, make phlebotomy instrument will not hurt medical staff by mistake.

Description

Technical Field

[0001] This utility model relates to the field of medical equipment technology, specifically a disposable retractable anti-needle-puncture venous blood collection device. Background Technology

[0002] A blood collection device is a widely used medical instrument, mainly used to collect venous blood samples from the human body for blood testing and analysis. During medical use, the needle of the blood collection device may carry viruses or bacteria after blood collection. If not handled in time, it can easily cause accidental injury and infection to medical staff. Utility Model Content

[0003] In view of the above-mentioned defects in the existing technology, the purpose of this utility model is to provide a disposable retractable anti-needle-puncture venous blood collection device.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A disposable retractable needle-puncture-proof venous blood collection device includes an outer sleeve and an inner core. The inner core is slidably locked inside the outer sleeve. The front end of the inner core is connected to a needle, and the rear end is connected to a blood collection tube. The outer sleeve is provided with a first locking mechanism and a second locking mechanism. When the inner core engages with the first locking mechanism of the outer sleeve, the needle extends out of the outer sleeve. When the inner core engages with the second locking mechanism of the outer sleeve, the needle retracts into the outer sleeve. A forced retraction mechanism is provided between the inner core and the outer sleeve. When the inner core is released from the first locking mechanism, the forced retraction mechanism moves the inner core to the second locking mechanism.

[0006] Furthermore, the inner card core includes a connecting tube, the front end of which is connected to the needle, and the rear end of which is connected to the blood collection tube;

[0007] Specifically, an arc-shaped elastic body is provided on the upper rear end of the outer wall of the connecting tube body, and a buckle is provided on the outer wall of the end of the arc-shaped elastic body away from the connecting tube body. A first slot is provided between the rear end of the buckle and the arc-shaped elastic body for connection with the first snap-fit ​​mechanism.

[0008] Furthermore, the outer sleeve includes an outer body, the sleeve wall of which is provided with a snap-fit ​​hole, the snap-fit ​​hole being a first snap-fit ​​mechanism, the buckle being inserted into the snap-fit ​​hole under the action of an arc-shaped elastic body, and the first slot engaging with the edge of the snap-fit ​​hole;

[0009] Specifically, a baffle is provided on the lower rear end of the inner wall of the outer casing body. The baffle is a second snap-fit ​​mechanism and can contact and cooperate with the rear end face of the inner spring seat.

[0010] Furthermore, the forced retraction mechanism is a spring, with an inner spring seat provided on the outer wall of the connecting tube and an outer spring seat provided on the inner wall of the front end of the outer sleeve body. A spring is provided between the inner spring seat and the outer spring seat, and the spring is sleeved on the outer wall of the connecting tube.

[0011] Specifically, the rear end of the spring seat can contact the second snap-fit ​​mechanism.

[0012] Furthermore, a handle ring groove is provided on the outer wall of the outer casing body, and a handle is assembled in the handle ring groove. The handle includes a circular ring body, and a horizontal handle piece is provided at the lower end of the outer wall of the circular ring body.

[0013] Furthermore, it also includes a first locking mechanism, which includes a resilient handle and a resistance block;

[0014] Specifically, the outer sleeve is provided with two symmetrically distributed horizontal U-shaped holes, and the U-shaped holes contain elastic handles. The inner wall of the end of the elastic handle is provided with an inner locking block. The connecting tube is provided with two symmetrically distributed resistance blocks. The front and rear end faces of the inner locking block and the resistance block are both inclined surfaces. When the first slot is engaged with the locking hole, the rear end face of the resistance block contacts the front end face of the inner locking block.

[0015] Furthermore, it also includes a second card-connecting safety mechanism, which includes a card-connecting block and a second card slot;

[0016] Specifically, a snap-fit ​​block is provided on the upper rear side of the inner wall of the outer body, a second snap-fit ​​groove is provided on the outer wall of the buckle, the rear end of the buckle can cooperate with the snap-fit ​​block, and the buckle causes the second snap-fit ​​groove to cooperate with the snap-fit ​​block under the action of the arc-shaped elastic body.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] 1. After the inner core is disengaged from the first locking mechanism, the present invention moves the inner core to the second locking mechanism through a forced retraction mechanism, thereby retracting the needle and preventing the blood collection device from accidentally injuring medical personnel.

[0019] 2. This utility model adapts to the operating habits of different medical staff through single-wing handles and double-wing handles.

[0020] 3. This utility model makes the extension and retraction states of the needle more stable through the first and second locking safety mechanisms, thereby further improving safety. Attached Figure Description

[0021] Figure 1 This is a side sectional view of the extended state of the disposable retractable anti-needle-puncture venous blood collection device of this utility model.

[0022] Figure 2This is a side sectional view of the retracted state of the disposable retractable anti-needle-puncture venous blood collection device of this utility model.

[0023] Figure 3 This is a top-section structural diagram of the extended state of the disposable retractable anti-needle-puncture venous blood collection device of this utility model.

[0024] Figure 4 This is a top-section structural diagram of the retracted state of the disposable retractable anti-needle-puncture venous blood collection device of this utility model.

[0025] Figure 5 This is a top view of the disposable retractable anti-needle-puncture venous blood collection device of this utility model;

[0026] Figure 6 This is a side view of the disposable retractable anti-needle-puncture venous blood collection device of this utility model;

[0027] Figure 7 This is a schematic diagram of the single-wing handle in this utility model.

[0028] In the picture: 1. Needle;

[0029] 2. Outer sleeve; 21. Outer body; 22. Snap-fit ​​hole; 23. Snap-fit ​​block; 24. Handle ring groove; 25. Outer spring seat; 26. Elastic handle; 27. Inner snap-fit ​​block; 28. Baffle;

[0030] 3. Inner core; 31. Connecting tube; 32. Arc-shaped elastic body; 33. Buckle; 34. First slot; 35. Second slot; 36. Inner spring seat; 37. Resistance block;

[0031] 4. Handle; 41. Ring body; 42. Horizontal handle plate;

[0032] 5. Blood collection tubes; 6. Springs. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] Example 1: Please refer to Figure 1 , Figure 2 , Figure 5 , Figure 6 , Figure 7The present invention provides a disposable retractable anti-needle-puncture venous blood collection device, comprising an outer sleeve 2 and an inner core 3. The inner core 3 is slidably locked inside the outer sleeve 2. The front end of the inner core 3 is sealed and connected to a needle 1, and the rear end of the inner core 3 is sealed and connected to a blood collection tube 5. The outer sleeve 2 is provided with a first locking mechanism and a second locking mechanism. When the inner core 3 is locked with the first locking mechanism of the outer sleeve 2, the needle 1 extends out of the outer sleeve 2. When the inner core 3 is locked with the second locking mechanism of the outer sleeve 2, the needle 1 retracts into the outer sleeve 2. A forced retraction mechanism is provided between the inner core 3 and the outer sleeve 2. When the inner core 3 is released from the first locking mechanism, the forced retraction mechanism moves the inner core 3 to the second locking mechanism.

[0035] Furthermore, the inner core 3 includes a connecting tube 31, the front end of which is sealed and inserted into the needle 1 or sealed and connected with medical adhesive, and the rear end of which is sealed and inserted into the blood collection tube 5 or sealed and connected with medical adhesive; an arc-shaped elastic body 32 is provided on the upper side of the rear end of the outer wall of the connecting tube 31, and a buckle 33 is provided on the outer wall of the end of the arc-shaped elastic body 32 away from the connecting tube 31, and a first slot 34 is provided between the rear end of the buckle 33 and the arc-shaped elastic body 32 for connection with the first snap-fit ​​mechanism.

[0036] Furthermore, the outer sleeve 2 includes an outer body 21, the sleeve wall of which is provided with a snap-fit ​​hole 22, the snap-fit ​​hole 22 being a first snap-fit ​​mechanism, the buckle 33 being inserted into the snap-fit ​​hole 22 under the action of the arc-shaped elastic body 32, and the first slot 34 engaging with the edge of the snap-fit ​​hole 22; a baffle 28 is provided on the lower rear end of the inner wall of the outer body 21, the baffle 28 being a second snap-fit ​​mechanism, the baffle 28 being able to contact and engage with the rear end face of the inner spring seat to prevent the inner core 3 from popping out.

[0037] Furthermore, the forced retraction mechanism is a spring 6, an inner spring seat 36 is provided on the outer wall of the connecting tube 31, an outer spring seat 25 is provided on the inner wall of the front end of the outer sleeve body 21, a spring 6 is provided between the inner spring seat 36 and the outer spring seat 25, the spring 6 is sleeved with the outer wall of the connecting tube 31, and the rear end of the spring seat 25 can contact the second snap-fit ​​mechanism.

[0038] Specifically, both the inner spring seat 36 and the outer spring seat 25 are connected to the end of the spring 6 through an annular groove.

[0039] Furthermore, the outer wall of the outer casing 21 is provided with a handle ring groove 24, and a handle 4 is assembled in the handle ring groove 24. The handle 4 includes a circular ring body 41, and a horizontal handle piece 42 is provided at the lower end of the outer wall of the circular ring body 41. One or two horizontal handle pieces 42 are provided, including a single-wing handle and a double-wing handle.

[0040] In the production process of this embodiment of the venous blood collection device, the assembly worker presses the arc-shaped elastic body 32 to push the inner core 3 into the outer sleeve 2, so that the buckle 33 passes through the locking block 23, and then pushes the blood collection tube 5 to make the inner core 3 into place, and the first slot 34 cooperates with the edge of the locking hole 22.

[0041] In this embodiment, when using the venous blood collection device, the single-wing handle or double-wing handle can be selected according to the medical staff's habits, such as left-handedness, right-handedness, and needle-holding habits. The handle 4 is fitted into the handle ring groove 24. The venous blood collection device is used with the assistance of the handle 4. After blood collection is completed, the buckle 33 is pressed, the first locking groove 34 is disengaged from the edge of the locking hole 22, the spring 6 causes the inner locking core 3 to move, and the inner spring seat 36 contacts the baffle 28. At this time, the needle 1 is completely retracted into the outer locking sleeve 2. The venous blood collection device is then discarded into a medical waste bag, eliminating the risk of accidental puncture to medical staff.

[0042] Example 2: Based on Example 1, combined with Figure 3 , Figure 4 In this embodiment, a first card-connecting insurance mechanism and a second card-connecting insurance mechanism are provided.

[0043] Furthermore, the first locking safety mechanism includes an elastic handle 26 and a resistance block 37. The outer sleeve 2 is provided with two symmetrically distributed horizontal U-shaped holes, and the elastic handle 26 is inside the U-shaped holes. An inner locking block 27 is provided on the inner wall of the end of the elastic handle 26. The connecting tube body 31 is provided with two symmetrically distributed resistance blocks 37. The front and rear end faces of the inner locking block 27 and the resistance block 37 are both inclined. When the first slot 34 is locked with the locking hole 22, the rear end face of the resistance block 37 contacts the front end face of the inner locking block 27. The resistance block 37 and the inner locking block 27 cannot maintain the extended state of the needle 1 by themselves.

[0044] Specifically, the center surfaces of the elastic handle 26 and the resistance block 37 coincide, and the center surface of the snap-fit ​​hole is the symmetrical surface of the two elastic handles 26 and the two resistance blocks 37.

[0045] Furthermore, the second locking mechanism includes a locking block 23 and a second locking groove 35. The locking block 23 is provided on the upper rear end of the inner wall of the outer casing 21, and the second locking groove 35 is provided on the outer wall of the buckle 33. The rear end of the buckle 33 can cooperate with the locking block 23. Under the action of the arc-shaped elastic body 32, the second locking groove of the buckle 33 cooperates with the locking block 23.

[0046] Specifically, the center surface of the snap-fit ​​hole 22 coincides with the center surface of the snap-fit ​​block 23, the center surface of the buckle 33 coincides with the center surface of the second slot 35, and the center surface of the snap-fit ​​block 23 coincides with the center surface of the second slot 35.

[0047] In the production process of this embodiment of the venous blood collection device, the assembly worker presses the arc-shaped elastic body 32 to push the inner core 3 into the outer sleeve 2, so that the buckle 33 passes through the snap-fit ​​block 23, and the rear end of the buckle 33 contacts the snap-fit ​​block 23. Then, by pushing the blood collection tube 5, the inner core 3 is put into place, the first slot 34 matches the edge of the snap-fit ​​hole 22, and the rear end face of the resistance block 37 contacts the front end face of the inner snap-fit ​​block 27.

[0048] The rear end of the buckle 33 contacts the locking block 23, reducing the probability that the inner card core 3 will pop out during the worker's switching between pushing the inner card core 3 and pushing the blood collection tube 5.

[0049] After blood collection is completed, the venous blood collection device in this embodiment presses the buckle 33, disengaging the first slot 34 from the edge of the locking hole 22. The spring 6 moves the inner locking core 3, and the rear end of the buckle 33 contacts the locking block 23. At this time, the arc-shaped elastic body 32 extends out of the outer sleeve 2. By pressing the arc-shaped elastic body 32, the buckle 33 is moved, causing the second slot 35 to engage with the locking block 23. The inner spring seat 36 contacts the baffle 28, and the needle 1 is completely retracted into the outer sleeve 2. The venous blood collection device can then be discarded into a medical waste bag, eliminating the risk of accidental puncture wounds to medical personnel.

[0050] The rear end of the buckle 33 contacts the snap-fit ​​block 23 to absorb the energy of the spring 6, reducing the probability that the spring 6 will cause the inner core 3 to pop out directly from the outer sleeve 2. The second slot 35 cooperates with the snap-fit ​​block 23 to improve the stability of the venous blood collection device in the retracted state.

[0051] All components not discussed in detail in this application, as well as the connection methods of these components, are well-known technologies in this field. They can be directly applied and will not be elaborated further.

[0052] In this utility model, the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0053] In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0054] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0055] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A disposable retractable anti-needle-puncture venous blood collection device, characterized in that, It includes an outer card sleeve and an inner card core, wherein the inner card core is slidably locked inside the outer card sleeve, the front end of the inner card core is connected to a needle, and the rear end of the inner card core is connected to a blood collection tube; The outer sleeve is provided with a first locking mechanism and a second locking mechanism. When the inner core is locked with the first locking mechanism of the outer sleeve, the needle extends out of the outer sleeve. When the inner core is locked with the second locking mechanism of the outer sleeve, the needle retracts into the outer sleeve. A forced retraction mechanism is provided between the inner card core and the outer card sleeve. When the inner card core is disengaged from the first card engagement mechanism, the forced retraction mechanism moves the inner card core to the second card engagement mechanism.

2. The disposable retractable anti-needle-puncture venous blood collection device according to claim 1, characterized in that, The inner core includes a connecting tube, the front end of which is connected to a needle, and the rear end of which is connected to a blood collection tube. An arc-shaped elastic body is provided on the upper rear end of the outer wall of the connecting tube. A buckle is provided on the outer wall of the end of the arc-shaped elastic body away from the connecting tube. A first slot is provided between the rear end of the buckle and the arc-shaped elastic body for connection with the first snap-fit ​​mechanism.

3. The disposable retractable anti-needle-puncture venous blood collection device according to claim 2, characterized in that, The outer sleeve includes an outer body, and the sleeve wall of the outer body is provided with a snap-fit ​​hole. The snap-fit ​​hole is a first snap-fit ​​mechanism. The buckle is inserted into the snap-fit ​​hole under the action of the arc-shaped elastic body, and the first slot cooperates with the edge of the snap-fit ​​hole. A baffle is provided on the lower rear end of the inner wall of the outer casing. The baffle is a second snap-fit ​​mechanism and can contact and cooperate with the rear end face of the inner spring seat.

4. The disposable retractable anti-needle-puncture venous blood collection device according to claim 3, characterized in that, The forced retraction mechanism is a spring. An inner spring seat is provided on the outer wall of the connecting tube, and an outer spring seat is provided on the inner wall of the front end of the outer sleeve body. A spring is provided between the inner spring seat and the outer spring seat, and the spring is sleeved on the outer wall of the connecting tube. The rear end of the spring seat can contact the second snap-fit ​​mechanism.

5. The disposable retractable anti-needle-puncture venous blood collection device according to claim 4, characterized in that, The outer wall of the outer casing is provided with a handle ring groove, and a handle is assembled in the handle ring groove. The handle includes a circular ring body, and a horizontal handle piece is provided at the lower end of the outer wall of the circular ring body.

6. The disposable retractable anti-needle-puncture venous blood collection device according to claim 4, characterized in that, It also includes a first locking mechanism, which includes a resilient handle and a resistance block; The outer sleeve is provided with two symmetrically distributed horizontal U-shaped holes. The U-shaped holes contain elastic handles. The inner wall of the end of the elastic handle is provided with an inner locking block. The connecting tube is provided with two symmetrically distributed resistance blocks. The front and rear end faces of the inner locking block and the resistance block are both inclined. When the first slot is engaged with the locking hole, the rear end face of the resistance block contacts the front end face of the inner locking block.

7. The disposable retractable anti-needle-puncture venous blood collection device according to claim 4, characterized in that, It also includes a second card-connecting safety mechanism, which includes a card-connecting block and a second card slot; A snap-fit ​​block is provided on the upper rear end of the inner wall of the outer body, and a second snap-fit ​​groove is provided on the outer wall of the buckle. The rear end of the buckle can cooperate with the snap-fit ​​block, and the buckle makes the second snap-fit ​​groove cooperate with the snap-fit ​​block under the action of the arc-shaped elastic body.

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