Single pre-pressure blood collection device

Abstract

The application provides a single pre-press blood collector, which comprises a sealing cover, a bottom cover, a piston rod, a first spring, a needle seat, an unlocking rod, a microneedle, a second spring, a handle cap and a blood collection tube. When the unlocking rod is pressed down, the needle holder is extruded and ejected to pierce the skin, and when a certain distance is pressed, the buckle of the piston rod on the bottom cover of the blood collector is extruded, the piston rod moves upward under the action of the large spring force, the blood enters the blood collection tube under the action of the negative pressure, and the microneedle is automatically pulled out and collected after completing the piercing. The application adopts a double-spring structure, and the needle and the negative pressure cavity are limited by the two pairs of inclined surfaces and the buckle device on the piston rod and the unlocking rod through twice clamping, so that the user can complete the piercing, blood collection and resetting three steps at one time, the technical threshold of blood collection is reduced, the labor is saved, and the user convenience is greatly improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of medical devices, and particularly relates to a blood collector for non-professional operation and use. BACKGROUND

[0002] In the current medical testing industry, blood sample collection plays a key role in disease diagnosis. However, the traditional blood collection method has many problems, especially for patients who are non-professionals, and it is difficult to find the blood vessel and accurately puncture the needle. With the development of society and the continuous growth of medical needs, the development of blood collection technology suitable for environments outside the hospital has become a necessity for patients.

[0003] The current blood collection technology has the following shortcomings: when collecting blood in a hospital, there are often long queues, noisy environments, and other situations, which are very inconvenient for elderly people, children, and patients with limited mobility to go to the hospital to collect blood. Moreover, blood collection work is usually completed by professional medical staff, which not only limits the choice of blood collection location, but also puts a lot of pressure on medical resources. In addition, the traditional blood collection method also has the risk of cross infection, especially when the same blood collection equipment is repeatedly used. From a technical point of view, the existing multi-needle puncture blood collection and vacuum blood collection tube blood collection technology, although to some extent, meet the blood collection needs, but still have many technical problems to be solved, such as complicated operation, unstable negative pressure, etc.

[0004] The applicant's prior application CN202411036196.X proposes a blood collector for non-professional operation and use, which sets the blood collection needle at the first end of the needle holder, the second end of the needle holder is in contact with the piston through the elastic device, the needle holder is provided with a stop arm, and when the launch cylinder moves in the first direction, the stop arm and the blocking member in the launch cylinder change from the first state to the second state, control the blood collection needle to be launched in the first direction, and under the control of the elastic device, the blood collection needle moves in the second direction by a preset distance, so that the blood collection needle cannot contact the skin again after one-time launching, thereby avoiding the problem of cross infection caused by multiple punctures. However, in the above-mentioned method, the negative pressure needs to be provided by the handle reset, which means that the patient needs to go through multiple steps to complete the blood collection when using it, which is easy to cause misoperation or quantitative deviation problems, and also causes inconvenience to the user. In addition, the blood collector of the above-mentioned prior application needs to be triggered by the user pressing the microneedle during use, and the user also needs to press the piston to generate negative pressure, which is not suitable for the elderly and children. SUMMARY

[0005] The application provides a blood collector, which comprises a sealing cover, a bottom cover, a piston rod, a first spring, a needle seat, an unlocking rod, a microneedle, a second spring, a handle cap and a blood collection tube; the unlocking rod is provided with a pair of reverse buckle bosses for pre-pressing the second spring, and further comprises a pair of first inclined surface bosses and a pair of second inclined surface bosses, which correspond to the needle seat and the piston rod respectively.

[0006] The application provides a blood collector, which comprises a sealing cover, a bottom cover, a piston rod, a first spring, a needle seat, an unlocking rod, a microneedle, a second spring, a handle cap and a blood collection tube;

[0007] The first spring (06) is located between the bottom cover (02) and the unlocking rod (08), and the second spring (10) is located between the piston rod (04) and the bottom cover (02);

[0008] The bottom cover (02) is provided with four first bosses (023) for limiting the needle seat (07);

[0009] The piston rod (04) comprises a first guide boss (042) arranged on the inner side and an outer side concave boss (043) arranged on the outer side, and a reverse buckle (045) corresponding to the first groove (024) of the bottom cover (02) and clamping the first spring (06) to be pre-pressed on the bottom cover (02);

[0010] The needle seat (07) is fixedly connected with the microneedle (09) through a buckle (071);

[0011] The unlocking rod (08) is provided with a pair of reverse buckle bosses (082) for pre-pressing the second spring (10); the unlocking rod (08) further comprises a pair of first inclined surface bosses (083) and a pair of second inclined surface bosses (084), the first inclined surface bosses (083) correspond to the needle seat (07), and the second inclined surface bosses (084) correspond to the piston rod (04).

[0012] In an embodiment, the blood sampler further comprises a top cover (03) which is tightly sealed with the bottom cover (02).

[0013] In an embodiment, the inside of the top cover (03) is provided with a guide groove (031) which corresponds to the guide of the piston rod (04).

[0014] In an embodiment, the blood sampler further comprises a first sealing ring (05) which forms a sealed cavity between the piston rod (04) and the top cover (03).

[0015] In an embodiment, the piston rod (04) is provided with a sealing groove (041) for mounting the first sealing ring (05), a groove guide groove (044) corresponding to the inside of the outside recess (043) for providing a guide for the unlocking rod (08).

[0016] The piston rod (04) further comprises a second groove (046) for limiting the unlocking rod (08).

[0017] The piston rod (04) further comprises a second boss (047) for providing an assembly support surface for the needle holder (07).

[0018] In an embodiment, the blood sampler further comprises a second sealing ring (12) which is mounted on the third groove (086) of the unlocking rod (08).

[0019] In an embodiment, when the unlocking rod (08) is pressed down, the first inclined boss (083) extrudes and deforms the spring inverted buckle (074) in the needle holder (07) inward, so that the spring inverted buckle (074) is separated from the second boss (047) of the piston rod (04), and then the elastic force of the second spring (10) is released, the microneedle (09) on the needle holder (07) is pushed out, so that the microneedle (09) pierces the skin.

[0020] In an embodiment, when the unlocking rod (08) is continuously pressed down, the second inclined boss (084) extrudes and deforms the inverted buckle (045) in the piston rod (04) outward, so that the second inclined boss (084) is separated from the first groove (024) of the bottom cover (02), and then the elastic force of the first spring (06) is released to push the piston rod (04) to move upward, forming a negative pressure cavity, under the negative pressure of the negative pressure cavity, blood can enter the inside of the blood sampling tube (13).

[0021] In a feasible embodiment, after the skin is punctured, under the action of negative pressure, the piston rod (04) first spring (06) continues to move by the elastic force, drives the second guide boss (081) of the unlocking rod (08) to move upward together through the second groove (046), so that the microneedle (09) moves upward from the skin.

[0022] In a feasible embodiment, the needle holder (07) is bonded inside the second spring (10), and the outer side is provided with a guide table (072) corresponding to the third groove (022) of the bottom cover (02):

[0023] Compared with the prior art, the present application has the following beneficial effects:

[0024] 1. The blood collector piston rod is provided with a buckle to be clamped on the blood collector bottom cover, and a large spring forming negative pressure is pre-pressed in the sealed cavity. After the unlocking rod is unlocked by pressing downward, the piston rod moves upward under the action of the elastic force of the large spring. The whole cavity directly forms negative pressure during the blood collection process, without the need for the user to additionally operate the handle to form negative pressure, thereby simplifying the operation process. Such design saves labor and greatly improves the user convenience.

[0025] 2. A locking buckle is arranged in the piston rod to clamp the unlocking rod in the piston rod. The unlocking rod presses the spring below, and the needle holder installed below the spring is clamped in the piston rod. When the unlocking rod is pressed downward, the needle holder can be sequentially extruded and ejected for puncture. After pressing for a certain distance, the buckle of the piston rod clamped on the blood collector bottom cover can be extruded, and the piston rod moves upward under the action of the elastic force of the large spring, thereby completing the blood collection step, shortening the blood collection time, and reducing the fear of blood collection of the user.

[0026] 3. The unlocking stroke of the unlocking rod can be adjusted to a closer distance for unlocking, so that the unlocking becomes pre-pressing, and the needle holder can be returned to the original position after unlocking only a small stroke.

[0027] 4. The mechanism pre-presses the large spring in the sealed cavity through the buckle mode, forms negative pressure after the unlocking rod is triggered, and the unlocking mode saves labor.

[0028] 5. The unlocking stroke of the unlocking rod can be adjusted to a closer or farther distance for pressing and unlocking, thereby preventing the mechanism from being triggered by mistake.

[0029] 6. The ingenious arrangement of the first spring (06) and the second spring (10) provides power for the microneedle puncture and negative pressure formation during the blood collection process. Through the operation of the unlocking rod (08), the spring elastic force is sequentially released, the microneedle can quickly and accurately puncture the skin, and the blood can be smoothly collected under the action of negative pressure. The whole process is simple and efficient to operate. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 Three views of the blood collection tube sealing cover of the present application.

[0031] Figure 2 Front view and top view of the bottom cover of the blood collection tube of the present application.

[0032] Figure 3 Bottom view of the top cover of the blood collection tube of the present application.

[0033] Figure 4 Front view and top view of the piston rod of the blood collection tube of the present application.

[0034] Figure 5 Front view and top view of the needle seat of the blood collection tube of the present application.

[0035] Figure 6 Front view of the unlocking rod of the blood collection tube of the present application Figure 1 , front view Figure 2 and top view.

[0036] Figure 7 Schematic diagram of the original working state of the blood collection tube of the present application.

[0037] Figure 8 Schematic diagram of the first unlocking working state of the blood collection tube of the present application.

[0038] Figure 9 Schematic diagram of the working state of the blood collection tube of the present application when the microneedle pierces the skin.

[0039] Figure 10 Schematic diagram of the second unlocking working state of the blood collection tube of the present application.

[0040] Figure 11 Schematic diagram of the working completion state of the blood collection tube of the present application. DETAILED DESCRIPTION

[0041] According to the drawings Figures 1-11 , the present application provides a blood collection device, comprising a sealing cover (01), a bottom cover (02), a top cover (03), a piston rod (04), a first sealing ring (05), a first spring (06), a needle seat (07), an unlocking rod (08), a microneedle (09), a second spring (10), a handle cap (11), a second sealing ring (12), and a blood collection tube (13).

[0042] In a feasible embodiment, referring to Figure 1 , the sealing cover (01) is made of soft rubber to adhere to the skin, and a sealing surface formed by adhering to the skin under vacuum negative pressure facilitates the blood to flow into the blood collection tube (13) after being sucked out through the microneedle.

[0043] The outer surface of the sealing cover (01) is a lip-shaped sealing ring (011), which can be attached to the skin surface using adhesive, and the back of the adhesive surface has a beveled guide groove. Blood flows into the blood collection tube along the flow channel, reducing the time of blood in the collector, and preventing blood clots from forming in the flow channel to interfere with detection sampling.

[0044] The micro-channel (015) of the sealing cover (01) has a hydrophobic soft rubber surface, and the flow channel curve is the fastest curve, which can make the blood sample take the shortest time and flow out the fastest after walking in the same position.

[0045] In a feasible embodiment, refer to Figure 2 , the bottom cover (02) supports the sealing cover (01) and forms a male-female buckle with the top cover (03) to press the sealing cover to form a seal. The support ring inside is provided with a guide groove on the inside and outside, the outside is used for the first guide (021) provided by the piston rod, and the inside is used for the second guide provided by the needle holder; additionally, there are four first bosses (023) inside, which are used to limit the needle holder (07) after launching, so that the micro-needles are launched to the skin surface at a fixed distance, and the micro-needles are also ensured to penetrate the skin at a fixed depth; additionally, the support ring inside is provided with a pair of first grooves (024), which are used to clamp the reverse buckle of the piston rod (04).

[0046] In a feasible embodiment, refer to Figure 3 , the top cover (03) is the support of the entire sampler shell, which forms a male-female buckle with the bottom cover (02) to press the sealing cover to form a seal. The top end is an opening, and the inner side of the circular ring is provided with a guide groove (031) for guiding the piston rod (04).

[0047] In a feasible embodiment, refer to Figure 4 , the piston rod (04) is provided with a sealing groove (041) for installing a sealing ring, and the inner side is provided with a first guide boss (042) for guiding movement in the bottom cover (02). It is provided with an outer recess (043), which can be guided to move in the top cover (03); the inner side corresponding to the outer recess (043) has a groove guide groove (044), which provides a guide for the unlocking rod (08); it is provided with a reverse buckle (045), which is clamped in the first groove (024) of the bottom cover (02) during assembly, and the first spring (06) is pre-pressed on the bottom cover (02); it is provided with a second groove (046), which is used to clamp the unlocking rod (08) inside for limiting; the inside is also provided with a second boss (047), which provides an assembly support surface for the needle holder (07).

[0048] In a feasible embodiment, the first sealing ring (05) forms a sealed cavity between the piston rod (04) and the top cover (03). When the piston rod (04) moves upward, the first sealing ring (05) and the top cover (03) form an air sealing area with pressure, making the sealing better, and there is a small amount of medical silicone oil inside, making the sealing better and the pressing smoother.

[0049] Further, the first spring (06) forms a vacuum degree emptying continuous power for the vacuum cavity.

[0050] In a feasible embodiment, referring to Figure 5 , the needle holder (07) is used for mounting microneedles, and the microneedle holder is clamped by buckling (071) to have better adaptability; the second spring (10) is bonded inside the needle holder (07) and assembled on the piston rod (04); the guiding table (072) is arranged on the outside of the needle holder (07) and can move in the third groove (022) of the bottom cover (02); a pair of third protrusions (073) are further arranged on the needle holder (07), the first protrusion (023) of the bottom cover (02) limits the needle holder (07) after being ejected, and ensures that the microneedle has a fixed depth when penetrating the skin; a pair of spring reverse buckles (074) are further arranged on the needle holder (07), when the unlocking lever (08) is pressed downward, the guiding surface of the unlocking lever (08) extrudes and deforms the spring reverse buckle (074) inward, so that the spring reverse buckle (074) is separated from the second protrusion (047) of the piston rod (04), and the needle holder (07) is ejected downward under the elastic force of the second spring (10), so that the microneedle penetrates the skin, and when the movement is fixed distance, the first protrusion (023) of the bottom cover (02) limits the needle holder (07) to complete the whole penetration action.

[0051] In a feasible embodiment, referring to Figure 6 , the unlocking lever (08) is provided with the second guiding protrusion (081) on the outside, which can move in the piston rod (040) and move a certain distance, when the piston rod (04) moves upward in the opposite direction, the second guiding protrusion (081) of the unlocking lever (08) is driven upward together with the second groove (046) of the piston rod (04); a pair of reverse buckle protrusions (082) are arranged on the unlocking lever (08), the second spring (10) is bonded inside the reverse buckle protrusions (082) during assembly, the reverse buckle protrusions (082) are clamped in the second groove (046) of the piston rod (04) when the second spring (10) is pre-pressed, the first inclined surface protrusion (083) and the second inclined surface protrusion (084) are arranged on the unlocking lever (08), when the unlocking lever (08) is pressed downward to unlock, the first inclined surface protrusion (083) first extrudes and deforms the spring reverse buckle (074) of the needle holder (07) inward, so that the spring reverse buckle (074) is separated from the second protrusion (047) of the piston rod (04), and the needle holder (07) is ejected downward under the elastic force of the second spring (10), so that the microneedle penetrates the skin.

[0052] Further, when the unlocking rod (08) continues to press down to unlock, the other pair of second inclined surface bosses (084) will extrude and deform the reverse buckle (045) of the piston rod (04) outward, and the reverse buckle (045) will be separated from the first groove (024) of the bottom cover (02). Under the elastic force of the first spring (06), the piston rod (04) moves upward, and the air in the sealed cavity is sucked out to form a negative pressure cavity. Under the action of negative pressure, a small amount of blood will continue to flow out after being pricked by the needle, and the blood will flow into the blood collection tube (13) along the guide groove of the sealing cover under the action of gravity. At this time, the piston rod (04) continues to move upward, and the second groove (046) of the piston rod (04) also drives the second guide boss (081) of the unlocking rod (08) to move upward, and the microneedle (09) is installed on the needle seat (07). The needle seat (07) is connected together through the second spring (10) and the unlocking rod (08). At this time, the microneedle also moves back from the skin; the unlocking rod is provided with a pair of fourth grooves (085) for clamping the handle cap (11); the unlocking rod is provided with a third groove (086) for installing the second sealing ring (12), which is used to form a sealed cavity.

[0053] Further, the microneedle (09) installed on the needle seat (07) provides the effect of pricking the skin for blood collection.

[0054] Further, the second spring (10) is respectively bonded on the needle seat (07) and the inner concave surface of the unlocking rod (08) at both ends, which is used to store power to provide power for the microneedle.

[0055] Further, the handle cap (11) is installed on the unlocking rod (08) for aesthetic effect and user pressing.

[0056] Further, the second sealing ring (12) is installed on the third groove (086) of the unlocking rod (08) to form a sealed cavity.

[0057] Further, the blood collection tube (13) collects the blood sample flowing from the skin after pricking.

[0058] In a feasible embodiment, reference can be made to Figures 7-11The user needs to cover the blood collection tube on the sealed cover sample bleeding port and form a seal with the sealed cover when using the blood collector. The blood collector mechanism is a one-key trigger type. When the user presses the handle cap (11) by a certain distance, the unlocking rod (08) will also press the unlocking rod downward at the same time. One of the two inclined face bosses, the first inclined face boss (083), of the unlocking rod first extrudes the spring reverse buckle (074) of the needle holder (07) inward to deform, so that the spring reverse buckle (074) is separated from the second boss (047) of the piston rod (04), and is launched downward under the action of the spring force, so that the microneedle (09) pierces the skin. The bottom cover (02) is provided with four first bosses (023) inside. When the needle holder (07) is launched, it is limited, so that the microneedle (09) is launched to the skin surface by a fixed distance, and also ensures that the microneedle (09) pierces the skin to a fixed depth; when the unlocking rod (08) continues to unlock downward, the other pair of second inclined face bosses (084) extrude the reverse buckle (045) of the piston rod (04) outward to deform, and separate from the first groove (024) of the bottom cover (02). Under the action of the first spring (06), the piston rod (04) moves upward to exhaust the air in the sealed cavity, forming a negative pressure cavity. Under the action of negative pressure, the blood pierced by the needle will continue to flow out in small amounts, and after the blood is collected, it will flow into the blood collection tube (13) under the action of gravity along the guide groove edge of the sealed cover. At this time, the piston rod (04) continues to move upward, and the second groove (046) of the piston rod (04) also drives the second guide boss (081) of the unlocking rod (08) to move upward. The needle holder (07) is connected with the unlocking rod (08) through the second spring (10), at this time, the microneedle (09) is separated from the skin and moves back.

[0059] Further, under the action of negative pressure, the blood pierced by the needle will continue to flow out in small amounts, and after the blood is collected, it will flow into the blood collection tube (13) under the action of gravity along the guide groove edge of the sealed cover.

[0060] Further, after the microneedle (09) pierces, a wound surface is formed, and after the blood sample seeps out, the blood will stay in place due to the small amount, and when the blood reaches a certain volume and is adsorbed together, the blood will flow to the sealed cover (01) along the wound due to the difference in hydrophilicity.

[0061] Further, the sealed cover (01) is tightly attached to the skin, and under the condition of negative pressure, it is tightly attached to the skin. The guide inclined surface (012) flows the blood sample together and flows downward. The guide inclined surface (012) is a hydrophobic new material, the surface does not stick to the sample, the collected sample accelerates to the guide inclined surface (012) along the micro channel (015) under the action of gravity, and enters the blood collection tube 13 of the guide pipe.

[0062] While the application has been described in connection with what is presently considered to be the most practical and preferred embodiments, it is to be understood that the application is not to be limited to the disclosed embodiments, but on the contrary, is intended to cover various modifications and equivalent arrangements. Accordingly, other embodiments of the application are intended to be within the scope of the appended claims, although other alternatives can occur to those skilled in the art upon employment of the novel teachings presented herein.

Claims

1. A blood collection device, characterized in that: The device includes a sealing cover (01), a bottom cover (02), a piston rod (04), a first spring (06), a needle holder (07), an unlocking rod (08), a microneedle (09), a second spring (10), a handle cap (11), and a blood collection tube (13). The first spring (06) is located between the bottom cover (02) and the unlocking rod (08), and the second spring (10) is located between the piston rod (04) and the bottom cover (02). The bottom cover (02) is provided with four first protrusions (023), which are used to limit the needle holder (07). The piston rod (04) has a first guide protrusion (042) on its inner side and an outer recess (043) on its outer side. The buckle (045) corresponds to the first groove (024) of the bottom cover (02), and the buckle engages to pre-press the first spring (06) onto the bottom cover (02); the needle seat (07) is fixedly connected to the micro needle (09) by a buckle (071); the unlocking rod (08) is provided with a pair of buckle protrusions (082), which pre-press the second spring (10); the unlocking rod (08) also includes a pair of first inclined protrusions (083) and a pair of second inclined protrusions (084), the first inclined protrusions (083) correspond to the needle seat (07), and the second inclined protrusions (084) correspond to the piston rod (04).

2. The blood collection device as claimed in claim 1, the blood collection device further comprising a top cover (03), the top cover (03) being pressed and sealed with the bottom cover (02).

3. The blood collection device as described in claim 2, wherein a guide groove (031) is provided on the inner side of the top cover (03), and the guide groove (031) is guided and corresponds to the piston rod (04).

4. The blood collection device as claimed in claim 2, wherein the blood collection device further comprises a first sealing ring (05), the first sealing ring (05) forming a sealed cavity between the piston rod (04) and the top cover (03).

5. The blood collection device as described in claim 4, wherein the piston rod (04) is provided with a sealing groove (041) for installing the first sealing ring (05) and a groove guide groove (044) corresponding to the inner side of the outer recess (043) to provide guidance for the unlocking rod (08); The piston rod (04) also includes a second groove (046) which limits the unlocking rod (08); The piston rod (04) also includes a second boss (047) which provides an assembly support surface for the needle seat (07).

6. The blood collection device as claimed in claim 1, the blood collection device further comprising a second sealing ring (12), the second sealing ring (12) being mounted on the third groove (086) of the unlocking rod (08).

7. The blood collection device as described in claim 5, when the unlocking rod (08) is pressed down, the first inclined boss (083) squeezes and deforms the spring buckle (074) in the needle seat (07) inward, so that the spring buckle (074) disengages from the second boss (047) of the piston rod (04), thereby causing the second spring (10) to release its elasticity and push the microneedle (09) on the needle seat (07) out, so that the microneedle (09) pierces the skin.

8. In the blood collection device as described in claim 7, when the unlocking rod (08) is continuously pressed down, the second inclined boss (084) squeezes and deforms the buckle (045) in the piston rod (04) outward, so that the second inclined boss (084) is disengaged from the first groove (024) of the bottom cover (02), thereby causing the first spring (06) to release its elastic force and push the piston rod (04) upward to form a negative pressure cavity. Under the negative pressure of the negative pressure cavity, blood can enter the blood collection tube (13).

9. In the blood collection device as described in claim 8, after the skin is punctured, under the negative pressure, the piston rod (04) moves continuously under the elastic force of the first spring (06), and the second groove (046) drives the second guide boss (081) of the unlocking rod (08) to move upward together, so that the microneedle (09) is disengaged from the skin and moves upward.

10. The blood collection device as claimed in claim 1, wherein the needle seat (07) is internally bonded to the second spring (10), and a guide platform (072) is provided on its outer side, the guide platform (072) corresponding to the third groove (022) of the bottom cover (02).

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