Needle holder and lancet assembly

Abstract

The utility model discloses a kind of needle holder and blood taking needle assembly, needle holder includes sleeve and clamping structure. Sleeve has the hollow cavity for accommodating blood taking tube, sleeve is equipped with needle body mounting part and the blood taking tube installation port communicated at hollow cavity respectively in axial direction, the circumferential wall of sleeve is also provided with the avoidance slot communicated hollow cavity;Clamping structure includes annular clamp sleeve and presss and clamps convex, presss and clamps convex is connected on the outer circumferential surface of annular clamp sleeve;Wherein, annular clamp sleeve is located in hollow cavity, presss and clamps convex extends to avoidance slot and is configured as in the radial direction of sleeve in avoidance slot to drive the inner circumferential surface of annular clamp sleeve and abuts blood taking tube. The needle holder of the application can hold tightly blood taking tube, make blood taking tube keep axial fixed during needle body puncture, reduce the possibility of blood taking tube separation and ejection.

Description

Technical Field

[0001] This utility model relates to the field of medical devices, and in particular to a needle holder and a blood collection needle assembly. Background Technology

[0002] Blood collection needles are a common medical device widely used in clinical blood collection procedures.

[0003] During the use of a blood collection needle, one end of the needle is inserted into the blood vessel of the person being sampled to collect blood, while the other end is inserted into the blood collection tube for collection.

[0004] In related technologies, the opening of the blood collection tube is equipped with an elastic rubber stopper, and the needle needs to pierce the elastic rubber stopper to collect the blood into the blood collection tube. However, during the process of piercing the elastic rubber stopper, the blood collection tube tends to spring back due to the elastic force of the rubber stopper, resulting in blood collection failure. Utility Model Content

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one objective of the present invention is to provide a needle holder that can hold the blood collection tube tightly, keeping the blood collection tube axially fixed during needle puncture, thereby reducing the possibility of the blood collection tube detaching or popping out.

[0006] This utility model also proposes a blood collection needle assembly.

[0007] A first aspect of this utility model provides a needle holder, which includes a sleeve and a clamping structure. The sleeve has a hollow cavity for accommodating a blood collection tube. At both axial ends of the sleeve are a needle mounting portion and a blood collection tube mounting port communicating with the hollow cavity. A clearance groove communicating with the hollow cavity is also formed on the peripheral wall of the sleeve. The clamping structure includes an annular clamp and a pressing protrusion. The pressing protrusion is connected to the outer peripheral surface of the annular clamp. The annular clamp is disposed within the hollow cavity, and the pressing protrusion extends into the clearance groove and is configured to move radially within the clearance groove along the sleeve to drive the inner peripheral surface of the annular clamp to abut against the blood collection tube.

[0008] In some embodiments, the pressing protrusion extends to protrude beyond the outer peripheral surface of the sleeve.

[0009] In some embodiments, the number of the clearance groove and the number of the pressing protrusion are both multiple and are configured in a one-to-one correspondence.

[0010] In some embodiments, at least two of the clearance slots are formed on opposite sides of the sleeve in the circumferential direction.

[0011] In some embodiments, the annular jacket is coaxially arranged with the sleeve.

[0012] In some embodiments, along the axial direction from the blood collection tube mounting port to the needle mounting portion, the inner circumferential surface of the annular jacket has a gradually narrowing circumferential surface and a gradually expanding circumferential surface arranged sequentially; the radial dimension of the gradually narrowing circumferential surface gradually decreases; and the radial dimension of the gradually expanding circumferential surface gradually increases.

[0013] In some embodiments, the inner circumferential surface of the annular jacket further includes a transition circumferential surface; the inner diameter of the transition circumferential surface is the same as the minimum inner diameter of the tapered circumferential surface and the minimum inner diameter of the expanding circumferential surface, respectively; the inner diameter of the transition circumferential surface is constant along the axial direction of the sleeve.

[0014] In some embodiments, the inner circumferential surface of the annular jacket is provided with an elastic material layer.

[0015] In some embodiments, the pressing protrusion and the annular sleeve are integrally formed from elastic material.

[0016] A second aspect of this utility model provides a blood collection needle assembly, which includes a needle body and a needle holder according to a first aspect of this utility model. The needle body is fixedly mounted on the needle body mounting portion of the needle holder.

[0017] As can be seen from the technical solution, the embodiments provided by this utility model have the following advantages: When the pressing protrusion is pressed radially in the relief groove, the pressing protrusion forces the annular sleeve to undergo elastic deformation, the inner diameter of the annular sleeve decreases, and the inner circumferential surface of the annular sleeve presses against and holds the blood collection tube tightly, so that the blood collection tube remains axially fixed during the needle puncture process, reducing the possibility of the blood collection tube detaching and popping out. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a cross-sectional schematic diagram of the needle holder according to an embodiment of the present utility model;

[0020] Figures 2-3 This is a schematic diagram of the needle holder according to an embodiment of the present utility model;

[0021] Figure 4 This is a cross-sectional schematic diagram of the assembly structure of the needle holder and blood collection tube according to an embodiment of the present utility model;

[0022] Figure 5 This is a schematic diagram of the assembly structure of the needle holder and blood collection tube according to an embodiment of the present utility model.

[0023] Figure label:

[0024] 100 needle holders, 200 blood collection tubes;

[0025] Sleeve 1, hollow cavity 10, needle body mounting part 11, blood collection tube mounting port 12, clearance groove 13;

[0026] Clamping structure 2, annular sleeve 21, outer circumferential surface of annular sleeve 211, inner circumferential surface of annular sleeve 212, tapered circumferential surface 2121, transition circumferential surface 2122, expanding circumferential surface 2123, pressing protrusion 22. Detailed Implementation

[0027] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0028] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] The following is for reference. Figures 1-5 This invention describes a needle holder 100 and a blood collection needle assembly according to an embodiment of the present invention.

[0031] Example 1

[0032] like Figure 1 As shown, this embodiment provides a needle holder 100, which includes a sleeve 1 and a clamping structure 2. The sleeve 1 has a hollow cavity 10, which can be used to accommodate a blood collection tube 200. One end of the sleeve 1 in the axial direction is provided with a needle mounting part 11, and the other end of the sleeve 1 in the axial direction is provided with a blood collection tube mounting port 12, which communicates with the hollow cavity 10, so that the blood collection tube 200 can be accommodated in the hollow cavity 10 through the blood collection tube mounting port 12. A clearance groove 13 is also formed on the peripheral wall of the sleeve 1, which communicates with the hollow cavity 10.

[0033] The clamping structure 2 includes an annular sleeve 21 and a pressing protrusion 22, which is connected to the outer peripheral surface 211 of the annular sleeve.

[0034] The annular sleeve 21 is located in the hollow cavity 10, and the pressing protrusion 22 extends into the relief groove 13. The pressing protrusion 22 can move radially along the sleeve 1 within the relief groove 13. The pressing protrusion 22 can also drive the inner circumferential surface 212 of the annular sleeve to abut against the blood collection tube 200.

[0035] In a specific application scenario, when the pressing protrusion 22 is pressed radially within the relief groove 13, it forces the annular sleeve 21 to undergo elastic deformation. This reduces the inner diameter of the annular sleeve 21, causing its inner circumferential surface 212 to press against and hold the blood collection tube 200 tightly, thus maintaining the axial fixation of the blood collection tube 200 during puncture and reducing the possibility of detachment or ejection. After releasing the pressure, the annular sleeve 21 elastically resets and releases the blood collection tube 200.

[0036] Here, the clearance groove 13 refers to the groove structure that runs through the circumferential wall of the sleeve 1.

[0037] As can be seen from the technical solution, the embodiments provided by this utility model have the following advantages: When the pressing protrusion 22 is pressed radially in the relief groove 13, the pressing protrusion 22 forces the annular sleeve 21 to undergo elastic deformation, the inner diameter of the annular sleeve 21 decreases, so that the inner circumferential surface 212 of the annular sleeve presses against and holds the blood collection tube 200 tightly, so that the blood collection tube 200 remains axially fixed during the puncture of the needle body, reducing the possibility of the blood collection tube 200 detaching and popping out.

[0038] like Figure 2 and Figure 3 As shown, the pressing protrusion 22 further extends to protrude from the outer peripheral surface of the sleeve 1. The pressing protrusion 22 passes through the relief groove 13, and the outer surface of the pressing protrusion 22 is higher than the outer surface, forming a protruding structure that makes pressing operation more convenient.

[0039] For example, the clearance groove 13 is constructed as a groove structure with both ends closed in the axial direction and both ends closed in the circumferential direction of the sleeve 1. Thus, the clearance groove 13 can restrict the movement of the pressing protrusion 22 in the axial and circumferential directions of the sleeve 1, constraining the pressing protrusion 22 to move only radially along the sleeve 1. The outer diameter of the annular sleeve 21 at the position corresponding to the clearance groove 13 is larger than the circumferential width of the clearance groove 13, restricting the annular sleeve 21 from radially disengaging from the clearance groove 13.

[0040] Example 2

[0041] like Figure 2 and Figure 3 As shown, there are multiple clearance grooves 13 and multiple pressing protrusions 22, with each clearance groove 13 and pressing protrusion 22 corresponding to the other. Multi-point synchronous clamping enhances the fixation of the blood collection tube 200, reducing deviation or loosening caused by single-point pressure.

[0042] like Figure 2 and Figure 3 As shown, furthermore, at least two clearance grooves 13 are formed on opposite sides of the sleeve 1 in the circumferential direction. Here, opposite sides in the circumferential direction means that the central angles of the two clearance grooves 13 differ by approximately 180°.

[0043] Example 3

[0044] like Figure 4 As shown, the annular sleeve 21 is further coaxially arranged with the sleeve 1. The coaxial structure of the annular sleeve 21 and the sleeve 1 facilitates automatic centering of the blood collection tube 200 after installation, and makes it convenient to position the insertion position between the blood collection tube 200 and the needle body of the blood collection needle assembly.

[0045] As can be seen from Embodiment 2 above, at least two clearance grooves 13 are formed on opposite sides of the sleeve 1 in the circumferential direction. Here, opposite sides in the circumferential direction means that the central angles of the two clearance grooves 13 differ by approximately 180°. This means that the annular sleeve 21 is coaxially arranged with the sleeve 1. When the two pressing protrusions 22 with a central angle difference of 180° are pressed simultaneously, the inner circumferential surface 212 of the annular sleeve symmetrically abuts against the blood collection tube 200, further improving the automatic centering capability of the blood collection tube 200 after installation.

[0046] like Figure 4As shown, further, along the axial direction from the blood collection tube mounting port 12 to the needle mounting part 11, the inner circumferential surface 212 of the annular jacket has a gradually narrowing circumferential surface 2121 and a gradually expanding circumferential surface 2123 arranged sequentially. The radial dimension of the gradually narrowing circumferential surface 2121 gradually decreases; the radial dimension of the gradually expanding circumferential surface 2123 gradually increases. That is to say, the radial dimension of the gradually narrowing circumferential surface 2121 gradually decreases along the insertion direction of the blood collection tube 200, forming a conical inlet, which is beneficial for guiding the blood collection tube 200 to the center position by the conical surface when inserted, avoiding deflection. The radial dimension of the gradually expanding circumferential surface 2123 gradually decreases along the withdrawal direction of the blood collection tube 200, which is beneficial for guiding the blood collection tube 200 to withdraw more smoothly from the clamping structure 2 and the sleeve 1.

[0047] It should be further explained that the axial direction from the blood collection tube installation port 12 to the needle body installation part 11 refers to the axial direction of the sleeve 1. When the annular sleeve 21 is inside the sleeve 1 and is not subjected to external force, the inner circumferential surface 212 of the annular sleeve is approximately coaxial with the sleeve 1.

[0048] like Figure 4 As shown, the inner circumferential surface 212 of the annular jacket further includes a transition circumferential surface 2122; the inner diameter of the transition circumferential surface 2122 is the same as the minimum inner diameter of the tapered circumferential surface 2121 and the maximum inner diameter of the expanding circumferential surface 2123, respectively; the inner diameter of the transition circumferential surface 2122 is constant along the axial direction of the sleeve 1. The constant inner diameter of the transition circumferential surface 2122, connecting the minimum inner diameter of the tapered circumferential surface 2121 and the minimum inner diameter of the expanding circumferential surface 2123, allows the clamping force to be distributed more evenly along the circumference of the blood collection tube 200, while increasing the contact area with the blood collection tube 200, which helps to keep the blood collection tube 200 axially fixed during puncture and reduces the possibility of detachment and ejection.

[0049] like Figure 4 and Figure 5 As shown, for example, the maximum diameter of the blood collection tube 200 is smaller than the inner diameter of the transition circumferential surface 2122. For example, the inner diameter of the transition circumferential surface 2122 is 20.4 mm, and the maximum diameter of the blood collection tube 200 is 20 mm.

[0050] Example 4

[0051] Furthermore, the inner circumferential surface 212 of the annular jacket is provided with an elastic material layer. The elastic material layer provides flexible clamping, improves the clamping effect, and reduces damage to the blood collection tube 200.

[0052] The elastic material layer here can be a rubber layer.

[0053] Example 5

[0054] Furthermore, the pressing protrusion 22 and the annular sleeve 21 are integrally formed elastic material components.

[0055] The elastic material here can be rubber.

[0056] Example 6

[0057] This embodiment provides a blood collection needle assembly, which includes a needle body (not shown in the figure) and a needle holder 100. The needle body is fixedly installed on the needle body mounting part 11 of the needle holder 100.

[0058] The needle mounting part 11 is specifically opened in the through hole at the end of the sleeve 1, and the through hole is provided with an internal thread for screwing the needle body.

[0059] In this embodiment, by setting the needle holder 100 as described above, when the pressing protrusion 22 is pressed radially within the relief groove 13, the pressing protrusion 22 forces the annular clip 21 to undergo elastic deformation. The inner diameter of the annular clip 21 decreases, thereby pressing and holding the blood collection tube 200 tightly against the inner circumferential surface 212 of the annular clip. This keeps the blood collection tube 200 axially fixed during puncture, reducing the possibility of the blood collection tube 200 detaching or popping out. After releasing the pressure, the annular clip 21 elastically resets and releases the blood collection tube 200.

[0060] Other components and operations of the blood collection needle assembly according to embodiments of the present invention are known to those skilled in the art and will not be described in detail here. In the description of the present invention, "first feature" and "second feature" may include one or more of the features. The up-down direction, left-right direction, and front-back direction are defined as shown in the figures.

[0061] In the description of this utility model, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features not in direct contact but through another feature between them. Moreover, "above," "over," and "on top" of the second feature include the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature.

[0062] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example 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.

[0063] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A needle holder, characterized in that, include: The sleeve (1) has a hollow cavity (10) for accommodating blood collection tubes. The sleeve (1) has a needle mounting part (11) and a blood collection tube mounting port (12) communicating with the hollow cavity (10) at both ends in the axial direction. The sleeve (1) also has a relief groove (13) communicating with the hollow cavity (10) on its peripheral wall. The clamping structure (2) includes an annular sleeve (21) and a pressing protrusion (22), the pressing protrusion (22) being connected to the outer peripheral surface (211) of the annular sleeve; The annular jacket (21) is located in the hollow cavity (10), and the pressing protrusion (22) extends into the relief groove (13) and is configured to move radially along the sleeve (1) in the relief groove (13) to drive the inner circumferential surface (212) of the annular jacket to abut against the blood collection tube.

2. The needle holder according to claim 1, characterized in that, The pressing protrusion (22) extends to protrude from the outer peripheral surface of the sleeve (1).

3. The needle holder according to claim 1, characterized in that, The number of the clearance groove (13) and the number of the pressing protrusion (22) are both multiple and are set in a one-to-one correspondence.

4. The needle holder according to claim 3, characterized in that, At least two of the clearance grooves (13) are formed on opposite sides of the sleeve (1) in the circumferential direction.

5. The needle holder according to claim 1, characterized in that, The annular sleeve (21) is coaxially arranged with the sleeve (1).

6. The needle holder according to claim 5, characterized in that, In the axial direction from the blood collection tube mounting port (12) to the needle mounting part (11), the inner circumferential surface (212) of the annular jacket has a gradually narrowing circumferential surface (2121) and a gradually expanding circumferential surface (2123) arranged sequentially. The radial dimension of the tapered circumferential surface (2121) gradually decreases; The radial dimension of the gradually expanding circumferential surface (2123) gradually increases.

7. The needle holder according to claim 6, characterized in that, The inner circumferential surface (212) of the annular jacket also includes a transition circumferential surface (2122). The inner diameter of the transition circumferential surface (2122) is the same as the minimum inner diameter of the tapered circumferential surface (2121) and the minimum inner diameter of the expanding circumferential surface (2123), respectively. Along the axial direction of the sleeve (1), the inner diameter of the transition circumferential surface (2122) is constant.

8. The needle holder according to claim 1, characterized in that, The inner circumferential surface (212) of the annular jacket is provided with an elastic material layer.

9. The needle holder according to claim 1, characterized in that, The pressing protrusion (22) and the annular sleeve (21) are elastic material parts integrally formed.

10. A blood collection needle assembly, characterized in that, include: Needle body; The needle holder according to any one of claims 1-9; The needle body is fixedly installed in the needle body mounting part (11) of the needle holder.

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