Blood sampling needling device
By designing a blood collection needle that can complete the needle and blood rubbing in one operation, it solves the problem of low blood collection efficiency and complex operation in existing technologies, and achieves a more efficient and safe blood collection process.
Patent Information
- Application Number
- CN202322718024.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-10-10
- Publication Date
- 2025-01-28
- Estimated Expiration
- 2033-10-10
Smart Images
Figure CN222398368U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of medical consumables, and in particular to a blood collection needle device. Background Art
[0002] The existing blood collection needle device consists of a needle and a needle rod. The needle is arranged at the head of the needle rod, and a sheath is slidably connected to the needle rod. A reset spring is arranged between the sheath and the needle rod, and the initial position of the sheath is located at the head of the needle and the needle rod. When the operator holds the needle tube and presses the head of the blood collection needle on the patient's limb, the sheath retracts under the elastic force of the skin, causing the needle to protrude and pierce the skin to cause minimal trauma. When the blood collection needle is removed, the sheath is reset under the action of the reset spring to cover the needle to prevent the needle from accidentally piercing the human body.
[0003] The initial blood (or first drop of blood) that flows out after finger pricking usually has a certain degree of contamination, because the first drop of blood is easily contaminated by the tissue around the skin, so the first drop of blood after finger pricking needs to be wiped off, and then the second drop of blood is squeezed out for testing.
[0004] At present, fingertip blood collection in various hospitals is done manually by nurses. The nurse directly holds the finger of the blood collector, disinfects and dries it with a cotton swab, uses a needle to pierce the skin of the fingertip, and then uses a cotton ball or cotton swab to wipe off the first drop of blood. In this process, the needle piercing and wiping the first drop of blood are completed in two steps, and the efficiency of blood collection is low. Utility Model Content
[0005] In order to simplify the process of fingertip blood collection and combine the steps of pricking the needle and wiping off the first drop of blood into one, the present application provides a blood collection needle device.
[0006] A blood collection needle device adopts the following technical solution:
[0007] A blood collection needle device comprises:
[0008] Shell tube;
[0009] A triggering member is axially nested with the outer shell tube and limitedly protrudes from the head end of the outer shell tube, and a through hole is provided at the head end of the triggering member;
[0010] A needle core is axially nested with the trigger member, the needle core comprises a core shaft and a needle head disposed at the head end of the core shaft, and the needle head is axially aligned with the through hole;
[0011] A first spring, disposed between the trigger and the needle;
[0012] A second spring is disposed between the core shaft and the rear end of the outer shell tube;
[0013] A cotton sleeve, which is sleeved on the outer periphery of the head end of the trigger member;
[0014] When the blood collection needle is used, the head end of the trigger member is pressed against the finger and elastically retracts into the outer shell tube so that the needle punctures the skin, and the cotton sleeve is used to wipe the initial blood after the finger is punctured.
[0015] By adopting the above technical solution, the head end of the trigger member is pressed toward the finger, the trigger member slides toward the outer shell tube, the trigger member squeezes the first spring, the first spring pushes the needle core, the needle core compresses the second spring so that the needle core can slide relative to the trigger member under the elastic force of the second spring, so that the needle passes through the through hole to pierce the finger, the first drop of blood flowing out after the fingertip is pierced is absorbed by the cotton sheath, and the needle core can be retracted into the trigger member under the elastic force of the first spring, thereby achieving the purpose of piercing the finger and wiping off the first drop of blood from the fingertip, and the needle can be retracted into the trigger member to avoid the needle being exposed to the outside and causing cross infection.
[0016] Preferably, the outer shell includes an outer cylinder and a limiting ring, and the limiting ring is connected to the head end of the outer cylinder;
[0017] The trigger member includes an exposed tube and an inner tube, the exposed tube and the inner tube are connected in a step shape, the inner tube is nested in the outer tube, the exposed tube is telescopic relative to the limiting ring and is axially slidably limited by the limiting ring.
[0018] By adopting the above technical solution, the inner tube is nested in the outer tube, and the exposed tube is exposed at the head end of the outer tube. The limit ring can limit the inner tube from sliding out of the head end of the outer tube, thereby realizing the axial movement of the trigger member in the outer tube and the trigger member will not be adjusted out from the head of the outer tube.
[0019] Preferably, the needle core further comprises a slider protruding from the outer peripheral surface of the core shaft;
[0020] The inner circumferential surface of the outer shell is provided with a first rib and a second rib, and a first slide groove and a second slide groove are formed between the first rib and the second rib;
[0021] The inner connecting tube also includes arc blocks arranged at intervals, and interval grooves are formed between the arc blocks. The arc blocks include a first arc plate, a second arc plate, and a third arc plate connected in sequence. The thickness of the second arc plate is less than the thickness of the first arc plate and the third arc plate, so as to form a guide groove between the first arc plate and the third arc plate, and the guide groove matches and slides with the first rib, and the first arc plate slides and is embedded in the first slide groove at the same time. A stop slope is formed on the free end of the first arc plate, and the second rib is embedded in the interval groove. The slider is initially loaded on the stop slope and is located in the first slide groove. When the trigger member retracts toward the outer shell tube, the slider passes over the top of the second rib from the first slide groove and enters the interval groove based on the push of the stop slope.
[0022] By adopting the above technical solution, the first rib is embedded in the guide groove, the first arc plate is embedded in the first slide groove, and the second rib is sleeved in the spacing groove, so that the trigger member can slide along the first rib and the second rib on the outer shell tube. The first rib and the second rib are provided to enable the trigger member to be stably nested in the outer shell tube and slide smoothly; the second rib and the stop bevel cooperate to enable the slider on the needle core to be stopped on the first arc plate, so that the needle core will not slide into the first slide groove prematurely.
[0023] Preferably, a guiding slope is provided on the top of the second rib.
[0024] By adopting the above technical solution, the guiding inclined surface can make it easier for the sliding block to slide into the first sliding groove when it is free from the obstruction of the second rib.
[0025] Preferably, an interlocking groove is further provided between the arc-shaped blocks, and the interlocking groove is matched and slidably interlocked with the second rib.
[0026] By adopting the above technical solution, the engaging groove and the second rib cooperate to enable the slider trigger member to slide along the second rib, and the engaging groove provides a matching space for the second rib.
[0027] Preferably, a first flared guide surface is provided on a side of the guide groove close to the exposed tube, and a second flared guide surface is provided on a side of the engagement groove close to the exposed tube, so as to facilitate the alignment and insertion of the trigger member relative to the outer shell tube.
[0028] By adopting the above technical solution, the guide groove is provided with a first flared guide surface to facilitate the first rib to be aligned when the trigger member and the outer shell are installed in cooperation, and the engaging groove is provided with a second flared guide surface to facilitate the second rib to be aligned when the trigger member and the outer shell are installed in cooperation.
[0029] Preferably, the blood collection needle device includes a rear cover, which is connected to the rear end of the outer cylinder, and one end of the second spring abuts against the rear cover.
[0030] By adopting the above technical solution, the second spring abuts against the rear cover, and when the trigger member pushes the needle core, the second spring is compressed toward the rear cover, and the elastic force of the second spring is used to launch the needle core.
[0031] Preferably, the rear cover comprises an insert cylinder and an end plate, the inner peripheral wall of the insert cylinder is provided with a tightening rib abutting against the second spring, and the protrusion degree of the tightening rib gradually increases in the direction toward the end plate.
[0032] By adopting the above technical solution, the second spring is fixedly mounted on the rear cover, so that the second spring can be clamped on the rear cover and is not easy to shake.
[0033] Preferably, the outer shell includes a first barrel section and a second barrel section connected in a stepped shaft shape, the free end of the first barrel section is provided with the limiting ring, and the second barrel section is a cylindrical barrel or a conical barrel.
[0034] By adopting the above technical solution, the outer shell tube is arranged in such a simple structure and the production cost is reduced.
[0035] Preferably, the blood collection needle device further comprises an end cover, and the end cover is sleeved with the first barrel section.
[0036] By adopting the above technical solution, sleeve-connecting the end cover on the first cylinder section can isolate the cotton sleeve from the air, making the cotton sleeve less likely to be contaminated.
[0037] In summary, the present application includes at least one of the following beneficial technical effects:
[0038] 1. It can achieve the purpose of piercing the finger with the needle core and wiping the first drop of blood from the fingertip through the cotton sleeve;
[0039] 2. The needle can be retracted into the trigger under the elastic force of the first spring, ensuring the safety of personnel and preventing them from being accidentally injured by the needle and from cross infection;
[0040] 3. It can realize the smooth firing of the trigger and reduce the stinging feeling. BRIEF DESCRIPTION OF THE DRAWINGS
[0041] Figure 1 It is a cross-sectional view of an embodiment of the present application.
[0042] Figure 2 It is a side sectional view of the outer shell cylinder of the embodiment of the present application.
[0043] Figure 3 It is a top sectional view of the outer shell cylinder of the embodiment of the present application.
[0044] Figure 4 It is a schematic diagram of the trigger structure of an embodiment of the present application.
[0045] Figure 5 It is a schematic diagram of the needle core structure of an embodiment of the present application.
[0046] Figure 6 It is a schematic diagram of the back cover structure of an embodiment of the present application.
[0047] Description of reference numerals: 1, outer shell; 11, outer cylinder; 12, limiting ring; 13, first rib; 14, second rib; 15, first slide groove; 16, second slide groove; 2, trigger member; 21, through hole; 22, inner tube; 221, arc block; 2211, first arc plate; 2212, second arc plate; 2213, third arc plate; 2214, guide groove; 2215, fitting groove; 222 , spacing groove; 23, exposed tube; 3, needle core; 31, core shaft; 32, needle; 33, slider 4, first spring; 5, second spring; 6, cotton sleeve; 7, back cover; 71, plug-in tube; 711, tightening rib; 72, end plate; 8, end cover; S1, stop slope; S2, guide slope; S3, first flaring guide surface; S4, second flaring guide surface; P1, first barrel section; P2, second barrel section. DETAILED DESCRIPTION
[0048] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.
[0049] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back...), such directional indications are only used to explain the relative position relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.
[0050] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.
[0051] The following is combined with Figure 1-6 This application is described in further detail.
[0052] like Figure 1 As shown, the blood collection needle device provided in the embodiment of the present application includes an outer shell tube 1, a trigger member 2, a needle core 3, a first spring 4, a second spring 5, a cotton sheath 6, a back cover 7, and an end cover 8. The needle core 3 is used to puncture the skin to allow blood to flow out, the trigger member 2 is used to push the needle core 3, and the cotton sheath 6 is used to absorb the first drop of blood that flows out.
[0053] like Figure 1 As shown, the blood collection needle device also includes an end cover 8, which is a cylinder with one end sealed, and can be used to protect the cotton sleeve 6 from being contaminated by the external environment when the blood collection needle device is not used.
[0054] like Figure 1 As shown, when using the blood collection needle device, the head end of the trigger member 2 is pressed, the trigger member 2 slides axially in the outer shell tube 1, the trigger member 2 pushes the first spring 4 to make the first spring 4 abut against the needle core 3, and the trigger member 2 continues to be pressed. The second spring 5 is compressed and generates elastic force to launch the needle core 3 to the head end of the trigger member 2. The needle core 3 pierces the skin to bleed out the first drop of blood, and then the cotton sheath 6 absorbs the first drop of blood.
[0055] like Figure 1 and Figure 2 As shown, the outer shell 1 includes a first barrel section P1 and a second barrel section P2, the first barrel section P1 and the second barrel section P2 are connected in a stepped shaft shape, a limiting ring 12 is provided at the free end of the first barrel section P1, the limiting ring 12 abuts against the trigger member 2 to prevent the trigger member 2 from falling off from the outer shell 1, and the second barrel section P2 is a conical barrel;
[0056] like Figure 1 and Figure 5As shown, the trigger member 2 is nested in the outer shell tube 1, and the needle core 3 is nested in the trigger member 2. The needle core 3 includes a core shaft 31 and a needle head 32 arranged at the head end of the core shaft 31. A first spring 4 is arranged between the first cylinder section P1 and the needle core 3. One end of the first spring 4 abuts against the trigger member 2 and the other end is a free end. A second spring 5 is arranged between the second cylinder section P2 and the needle core 3; a cotton sleeve 6 is sleeved on the outer periphery of the head end of the trigger member 2, an end cover 8 is sleeved on the outer periphery of the head end of the outer shell tube 1, and a rear cover 7 is provided at the tail end of the outer shell tube 1.
[0057] like Figure 2 and Figure 3 As shown, the outer shell tube 1 includes an outer cylinder body 11 and a limiting ring 12, the limiting ring 12 is connected to the head end of the outer cylinder body 11, and the inner circumference of the outer shell tube 1 is provided with a first rib 13 and a second rib 14 at intervals, and the first rib 13 and the second rib 14 are respectively provided with two and symmetrically distributed and fixed on the inner circumference of the outer shell body, and a first slide groove 15 and a second slide groove 16 are formed between the first rib 13 and the second rib 14.
[0058] like Figure 4 and Figure 5 As shown, two sliders 33 are symmetrically provided on the needle core 3, and the trigger member 2 includes an inner tube 22 and an outer tube 23, which are connected in a step shape, and the inner tube 22 is nested in the outer tube body 11, and the outer tube 23 is telescopic relative to the limiting ring 12 and is axially slidably limited by the limiting ring 12; a through hole 21 is provided on the outer tube 23 for the needle 32 to pass through, and the diameter of the through hole 21 is larger than the diameter of the needle 32.
[0059] like Figure 4 As shown, the inner tube 22 also includes two arc blocks 221 evenly spaced apart, the two arc blocks 221 have the same structure, a spacing groove 222 is formed between the arc blocks 221, the arc block 221 includes a first arc plate 2211, a second arc plate 2212, and a third arc plate 2213 connected in sequence, the thickness of the second arc plate 2212 is less than the thickness of the first arc plate 2211 and the third arc plate 2213, and a guide groove 2214 is formed between the first arc plate 2211 and the third arc plate 2213. 2214 is engaged with the first rib 13, and the first rib 13 can slide on the guide groove 2214. At the same time, the first arc plate 2211 is slidably engaged in the first slide groove 15. The free end of the first arc plate 2211 is formed with a stop slope S1. The second rib 14 is embedded in the spacing groove 222. An engaging groove 2215 is also provided between the arc blocks 221 for sliding engagement with the second rib 14. The width of the spacing groove 222 should be able to accommodate the slider 33 and the second rib 14 and enable the slider 33 to slide in the spacing groove 222.
[0060] like Figure 1 and Figure 4As shown, when the blood collection needle device is installed, the slider 33 of the needle core 3 is aligned with the stop bevel S1, and the stop bevel S1 has a certain limiting and blocking effect on the slider 33 of the needle core 3. After the trigger member 2 of the blood collection needle device is compressed, the first spring 4 pushes the trigger member 2 and the trigger member 2 pushes the second spring 5. The second spring 5 is deformed and compressed by the thrust and generates a reverse thrust to push the needle core 3. The needle core 3 is pushed by the first spring 4 to overcome the obstruction of the stop bevel S1 and quickly rushes out of the through hole 21 toward the first slide groove 15 to pierce the finger, and then returns to the inner tube 22 based on the elastic resistance of the first spring 4.
[0061] like Figure 2 and Figure 4 As shown, a guiding slope S2 is also provided at the top of the second rib 14, and the guiding slope S2 is parallel to the stop slope S1. The stop slope S1 of the trigger member 2 is pressed to push the slider 33. When the slider 33 is pushed to the top of the second rib 14, the stop slope S1 and the guiding slope S2 are on the same slope. At this time, the slider 33 can slide along the stop slope S1 to the guiding slope S2, and the slider 33 enters the spacing groove 222 through the guiding slope S2.
[0062] like Figure 4 As shown, a first flared guide surface S3 is provided on the side of the guide groove 2214 close to the exposed tube 23, and a second flared guide surface S4 is provided on the side of the engaging groove 2215 close to the exposed tube 23. Both the first flared guide surface S3 and the second flared guide surface S4 are symmetrically arranged oblique openings, which facilitates easier alignment of the trigger member 2 relative to the outer shell tube 1 when it is inserted.
[0063] like Figure 6 As shown, the blood collection needle device also includes a rear cover 7, which is nested in the rear end of the outer shell tube 1. The rear cover 7 includes a plug-in tube 71 and an end plate 72. The convex ribs arranged on the outer periphery of the plug-in tube 71 cooperate with the grooves arranged on the inner periphery of the outer shell tube 1, so that the rear cover 7 can be fixed to the rear end of the outer shell tube 1. The end plate 72 is fixed on the plug-in tube 71 to seal the outer cylinder body 11 and protect the outer cylinder body 11 from contamination. A tightening rib 711 is fixedly provided on the inner periphery of the plug-in tube 71. The convex thickness of the tightening rib 711 gradually increases along the direction of the end plate 72. The tightening rib 711 cooperates with the second spring 5 to clamp and fix the second spring 5, so that the second spring 5 is stably stressed and will not easily deviate when compressed.
[0064] The implementation principle of the blood collection needle device provided in the embodiment of the present application is as follows: the manipulator clamps the blood collection needle device and uses another manipulator to remove the end cover 8 of the blood collection needle device, moves the blood collection needle device above the finger so that the trigger member 2 is aligned with the finger position, and presses the blood collection needle device downward, and the trigger member 2 begins to push the first spring 4 to slide toward the rear end of the outer shell tube 1, and the first spring 4 is pushed to abut against the needle core 3 and continues to be compressed, and the second spring 5 is gradually compressed until the second spring 5 is compressed to the point where it can no longer be compressed, and the slider 33 on the needle core 3 breaks free from the restriction of the second rib 14 and slides toward the spacing groove 222. Under the elastic force of the second spring 5, the needle core 3 is rapidly ejected along the spacing groove 222. At this time, the needle head 32 on the needle core 3 can quickly complete the needle insertion operation, and the first drop of blood flows out after the fingertip is punctured. Since the finger is abutted against the cotton sheath 6 at this time, the first drop of blood can be absorbed by the cotton sheath 6; after the needle insertion action is completed, the needle head 32 is retracted into the trigger member 2 under the elastic force of the first spring 4 to prevent the needle head 32 from being exposed to the outside and causing cross infection.
[0065] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.
Claims
1. A blood collection needle device, characterized in that: include: An outer shell cylinder (1); A trigger member (2) is axially nested with the outer shell tube (1) and limitedly protrudes from the head end of the outer shell tube (1); a through hole (21) is provided at the head end of the trigger member (2); A needle core (3) is axially nested with the trigger member (2), the needle core (3) comprising a core shaft (31) and a needle head (32) disposed at the head end of the core shaft (31), the needle head (32) being axially aligned with the through hole (21); A first spring (4) is arranged between the trigger member (2) and the needle (32); a second spring (5) disposed between the core shaft (31) and the rear end of the outer shell tube (1); A cotton sleeve (6) is sleeved on the outer periphery of the head end of the trigger member (2); When the blood collection needle device is in use, the head end of the trigger member (2) is pressed against the finger and elastically retracts into the outer shell tube (1) so that the needle (32) punctures the skin, and the cotton sleeve (6) is used to wipe the initial blood after the finger is punctured.
2. The blood collection needle device according to claim 1, characterized in that: The outer shell (1) comprises an outer cylinder (11) and a limiting ring (12), wherein the limiting ring (12) is connected to the head end of the outer cylinder (11); The trigger member (2) comprises an inner tube (22) and an outer tube (23), wherein the inner tube (22) and the outer tube (23) are connected in a step-like manner, the inner tube (22) is nested in the outer tube body (11), and the outer tube (23) is telescopic relative to the limiting ring (12) and is axially slidably limited by the limiting ring (12).
3. The blood collection needle device according to claim 2, characterized in that: The needle core (3) further comprises a sliding block (33) protruding from the outer peripheral surface of the core shaft (31); The inner circumferential surface of the outer shell (1) is provided with a first rib (13) and a second rib (14), and a first slide groove (15) and a second slide groove (16) are formed between the first rib (13) and the second rib (14); The inner connecting tube (22) further comprises arc blocks (221) arranged at intervals, wherein interval grooves (222) are formed between the arc blocks (221), and the arc blocks (221) comprise a first arc plate (2211), a second arc plate (2212), and a third arc plate (2213) which are connected in sequence, wherein the thickness of the second arc plate (2212) is smaller than the thickness of the first arc plate (2211) and the third arc plate (2213), so as to form a guide groove (2214) between the first arc plate (2211) and the third arc plate (2213), and the guide groove (2214) and the first rib (13) are connected to each other. When the first arc plate (2211) is slidably engaged in the first slide groove (15) during the matching sliding engagement, a stop slope (S1) is formed at the free end of the first arc plate (2211), the second rib (14) is embedded in the spacing groove (222), the slider (33) is initially supported on the stop slope (S1) and is located in the first slide groove (15), and when the trigger member (2) retracts toward the outer shell tube (1), the slider (33) passes over the top of the second rib (14) from the first slide groove (15) and enters the spacing groove (222) based on the push of the stop slope (S1).
4. The blood collection needle device according to claim 3, characterized in that: A guiding slope (S2) is provided on the top of the second rib (14).
5. The blood collection needle device according to claim 3, characterized in that: An engaging groove (2215) is further provided between the arc-shaped blocks (221), and the engaging groove (2215) is matched and slidably engaged with the second rib (14).
6. The blood collection needle device according to claim 5, characterized in that: A first flared guide surface (S3) is provided on a side of the guide groove (2214) close to the exposed tube (23), and a second flared guide surface (S4) is provided on a side of the engagement groove (2215) close to the exposed tube (23), so as to facilitate the alignment and insertion of the trigger member (2) relative to the outer shell tube (1).
7. The blood collection needle device according to claim 2, characterized in that: The blood collection needle device comprises a rear cover (7), the rear cover (7) is connected to the rear end of the outer cylinder (11), and one end of the second spring (5) is in contact with the rear cover (7).
8. The blood collection needle device according to claim 7, characterized in that: The rear cover (7) comprises an insert cylinder (71) and an end plate (72); the inner peripheral wall of the insert cylinder (71) is provided with a tightening rib (711) that abuts against the second spring (5); the protrusion of the tightening rib (711) gradually increases in a direction toward the end plate (72).
9. The blood collection needle device according to claim 2, characterized in that: The outer shell cylinder (1) comprises a first cylinder section (P1) and a second cylinder section (P2) connected in a stepped shaft shape, the free end of the first cylinder section (P1) is provided with the limiting ring (12), and the second cylinder section (P2) is a cylindrical cylinder or a conical cylinder.
10. The blood collection needle device according to claim 9, characterized in that: The blood collection needle device further comprises an end cover (8), wherein the end cover (8) is sleeved with the first barrel section (P1) and is used to protect the cotton sleeve (6).