Blood sampling needle holder capable of preventing end opening from loosening

Abstract

The utility model discloses a blood sampling needle holder capable of preventing a port from loosening, which relates to the technical field of medical instruments and comprises a cylinder, the bottom of the cylinder is fixedly connected with an extending seat, the upper end of the cylinder is fixedly connected with a connecting seat, the upper end of the connecting seat is fixedly connected with a clamping seat used for mounting a blood sampling needle, and the end of the clamping seat is fixedly connected with a connecting rod. And the diameter of the top of the clamping seat is smaller than that of the bottom of the clamping seat. The blood taking needle is inserted into the clamping seat from one side of the positioning block through the arranged expansion groove and the positioning block, the top of the clamping seat can be gradually tightened by rotating the conical nut arranged on the clamping seat in a sleeving mode, finally, the outer wall of the blood taking needle is clamped and fixed through the multiple positioning blocks at the same time, and the blood taking needle can be clamped and fixed along with adjustment of the position of the conical nut. The clamping force formed between the end positioning blocks can be flexibly controlled, the phenomena such as port looseness are effectively avoided, the mounting stability of the blood taking needle is improved, and the blood taking efficiency is prevented from being affected by displacement or shaking of the blood taking needle in the puncture process.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a blood collection needle holder that prevents port loosening. Background Technology

[0002] A blood collection needle holder is a medical device that plays a crucial role in the blood collection process. It is generally made of medical materials such as plastic. It has a device to fix the blood collection needle, which usually includes a needle hub fixing part. This part can firmly clamp the needle hub of the blood collection needle, ensuring that the blood collection needle will not easily shake during use and can be accurately inserted into the vein. When the medical staff holds the blood collection needle holder and inserts the blood collection needle into the vein, the other end of the blood collection needle is connected to the blood collection tube. Using the venous blood pressure and the negative pressure in the blood collection tube, blood flows into the blood collection tube.

[0003] In clinical blood testing, blood collection needle holders are frequently used. Repeated insertion and withdrawal of the needle causes wear on the port, gradually weakening the clamping force of the existing structure. This results in the needle becoming loose and unable to be firmly secured after insertion, increasing the risk of needle displacement or movement during puncture. Furthermore, it can lead to a loose connection between the needle and blood collection tube, causing blood leakage and contaminating the blood collection environment, thus affecting efficiency. Therefore, this application proposes a blood collection needle holder designed to prevent port loosening. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a blood collection needle holder that prevents port loosening.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A blood collection needle holder with anti-loosening port includes a cylindrical body, an extension seat fixedly connected to the bottom of the cylindrical body, a connecting seat fixedly connected to the upper end of the cylindrical body, a clamping seat for installing a blood collection needle fixedly connected to the upper end of the connecting seat, and the diameter of the top of the clamping seat is smaller than the diameter of the bottom of the clamping seat, and the side wall of the clamping seat is provided with external threads.

[0007] A conical nut is fitted on the threaded portion of the clamping seat corresponding to the external thread, and the diameter of the top of the conical nut is smaller than the diameter of the bottom of the conical nut. The conical nut, together with the clamping seat, enables the quick disassembly of the blood collection needle. An assembly plate is fixedly connected to the top of the conical nut, and a reinforcing plate is fixedly connected to the bottom of the conical nut.

[0008] As a further preferred embodiment of this technical solution, an annular seat is fixedly connected to the inner top of the cylinder, and the diameter of the annular seat is equal to the diameter of the through groove opened at the top of the cylinder.

[0009] A limiting plate is fixedly connected to the bottom of the annular seat. The diameter of the limiting plate is smaller than that of the annular seat. By setting the limiting plate, when placing the blood collection needle into the cylinder, the needle seat of one end of the blood collection needle contacts the side wall of the limiting plate, which can quickly complete the positioning of the blood collection needle and keep the needle tip of the blood collection needle extending to the outside of the cylinder at an appropriate length.

[0010] As a further preferred embodiment of this technical solution, the inner wall of the conical nut is provided with a threaded groove, and the size of the threaded groove corresponds to the size of the external thread. Through the engagement between the external thread and the threaded groove, self-locking can be provided between the clamping seat and the conical nut, preventing the conical nut from moving during use. Furthermore, in medical clinical blood testing projects, if blood collection needles of the same specification need to be used, the conical nut can be slightly turned. After a short stroke, the conical nut drives the positioning block at the end to contact the limiting position of the blood collection needle, which can quickly complete the replacement of the blood collection needle. The operation is convenient, saves manpower, and improves blood collection efficiency.

[0011] As a further preferred embodiment of this technical solution, the clamping seat is provided with partition plates separated by multiple expansion grooves opened in the circumferential direction. Each partition plate is provided with a spherical pad on its top. When the end of the clamping seat contracts inward, the spherical pad will first contact the blood collection needle and deform by its own material, thereby adjusting the force applied to the blood collection needle body at different angles.

[0012] As a further preferred embodiment of this technical solution, a positioning block is fixedly connected to the top of each of the multiple partition plates, and the multiple positioning blocks are all vertically arranged relative to the cylinder. By moving the multiple positioning blocks simultaneously, the blood collection needle can be quickly clamped. The vertical arrangement of the positioning blocks ensures that the sidewalls of the positioning blocks and the blood collection needles are in the same direction, increasing the contact area between the positioning blocks and the blood collection needles and improving the stability of clamping.

[0013] As a further preferred embodiment of this technical solution, multiple adhesive strips are respectively provided on the side wall of the positioning block. By providing multiple adhesive strips, the friction between the positioning block and the blood collection needle can be increased, avoiding the reduction of the clamping force of the positioning block due to the excessive smoothness of the contact surface, and preventing the side wall of the positioning block from directly contacting the blood collection needle, thereby reducing the damage to the outer surface of the blood collection needle.

[0014] This utility model has the following beneficial effects:

[0015] 1. This utility model, through the setting of expansion grooves and positioning blocks, allows the blood collection needle to be inserted into the clamping seat from one side of the positioning block during blood collection. The needle seat of the blood collection needle contacts the limiting plate, ensuring that the blood collection needle extends to a suitable length. At this time, rotating the conical nut sleeved on the clamping seat, under the engagement of the external thread and the thread groove, allows the top of the clamping seat to gradually tighten. Finally, multiple positioning blocks simultaneously clamp and fix the outer wall of the blood collection needle. With the adjustment of the position of the conical nut, the clamping force formed between the end positioning blocks can be flexibly controlled, effectively avoiding phenomena such as port loosening due to wear, improving the stability of the blood collection needle installation, and preventing the blood collection needle from shifting or shaking during puncture, thus affecting the blood collection efficiency.

[0016] 2. The spherical pad and rubber strip of this utility model can simultaneously contact the side wall of the blood collection needle when the positioning blocks move closer to each other, so as to ensure that the clamping force is applied evenly to the blood collection needle, avoid damage to the structure of the blood collection needle, improve the accuracy of the blood collection needle installation, avoid the risk of tilting during subsequent puncture, and improve the practicality of this device. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the main structure of a blood collection needle holder for preventing port loosening proposed in this utility model;

[0018] Figure 2 This is a cross-sectional structural diagram of the cylinder of a blood collection needle holder for preventing port loosening proposed in this utility model;

[0019] Figure 3 This is a schematic diagram of the main structure of the conical nut of a blood collection needle holder for preventing port loosening proposed in this utility model;

[0020] Figure 4 This is a schematic diagram of the main structure of the clamping seat of a blood collection needle holder that prevents port loosening, as proposed in this utility model.

[0021] Figure 5 This is a cross-sectional view of the clamping structure of a blood collection needle holder for preventing port loosening proposed in this utility model.

[0022] In the diagram: 1. Cylinder; 11. Extension seat; 12. Connecting seat; 2. Annular seat; 21. Limiting plate; 3. Clamping seat; 31. External thread; 32. Expansion groove; 33. Spherical pad; 4. Positioning block; 41. Rubber strip; 5. Conical nut; 51. Threaded groove; 52. Assembly plate; 53. Reinforcing plate. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0024] This utility model provides a technical solution: such as Figure 1-5 As shown, a blood collection needle holder with anti-loosening port includes a cylindrical body 1. An extension seat 11 is fixedly connected to the bottom of the cylindrical body 1, and a connecting seat 12 is fixedly connected to the upper end of the cylindrical body 1. A clamping seat 3 for installing a blood collection needle is fixedly connected to the upper end of the connecting seat 12. The diameter of the top of the clamping seat 3 is smaller than the diameter of the bottom of the clamping seat 3, and an external thread 31 is provided on the side wall of the clamping seat 3.

[0025] A conical nut 5 is fitted on the threaded portion of the clamping seat 3 corresponding to the external thread 31. The diameter of the top of the conical nut 5 is smaller than the diameter of the bottom of the conical nut 5. The conical nut 5 works with the clamping seat 3 to enable quick disassembly of the blood collection needle. An assembly plate 52 is fixedly connected to the top of the conical nut 5. The assembly plate 52 can limit the opening angle of the clamping seat 3. When the clamping seat 3 is damaged and expands outward, it will damage the inner wall of the conical nut 5. A reinforcing plate 53 is fixedly connected to the bottom of the conical nut 5. When the conical nut 5 is screwed down and contacts the cylinder 1, the reinforcing plate 53 can provide a certain degree of protection for the bottom of the conical nut 5 and reduce the wear of the conical nut 5.

[0026] The inner top of the cylinder 1 is fixedly connected to an annular seat 2, and the diameter of the annular seat 2 is equal to the diameter of the through groove opened at the top of the cylinder 1. The bottom of the annular seat 2 is fixedly connected to a limiting plate 21, the diameter of the limiting plate 21 is smaller than the diameter of the annular seat 2. By setting the limiting plate 21, when the blood collection needle is placed into the cylinder 1, the needle seat at one end of the blood collection needle contacts the side wall of the limiting plate 21, which can quickly complete the positioning of the blood collection needle and keep the needle tip of the blood collection needle extending to the outside of the cylinder 1 at an appropriate length.

[0027] The conical nut 5 has a threaded groove 51 on its inner wall, and the size of the threaded groove 51 corresponds to the size of the external thread 31. Through the engagement between the external thread 31 and the threaded groove 51, a self-locking mechanism can be provided between the clamping seat 3 and the conical nut 5, preventing the conical nut 5 from moving during use. Furthermore, in medical clinical blood testing projects, if the same specification blood collection needle is required, the conical nut 5 can be slightly turned. The conical nut 5 travels a short distance and drives the end positioning block 4 to contact the limit of the blood collection needle, which can quickly complete the replacement of the blood collection needle. The operation is convenient, saves manpower, and improves blood collection efficiency.

[0028] The clamping seat 3 is divided into partition plates by multiple expansion grooves 32 opened in the circumferential direction. Each partition plate is provided with a spherical pad 33 on its top. When the end of the clamping seat 3 contracts inward, the spherical pad 33 will first contact the blood collection needle and deform by its own material, thereby adjusting the force applied to the blood collection needle body at different angles.

[0029] The top of each of the multiple partition plates is fixedly connected to a positioning block 4, and the multiple positioning blocks 4 are all vertically set relative to the cylinder 1. By moving the multiple positioning blocks 4 at the same time, the blood collection needle can be quickly clamped. The vertical setting of the positioning blocks 4 ensures that the side walls of the blood collection needle are in the same direction, increasing the contact area between the positioning blocks 4 and the blood collection needle and improving the stability of clamping.

[0030] The positioning block 4 has multiple adhesive strips 41 on its side wall. These adhesive strips 41 increase the friction between the positioning block 4 and the blood collection needle, preventing the clamping force of the positioning block 4 from being reduced due to an overly smooth contact surface. They also prevent the side wall of the positioning block 4 from directly contacting the blood collection needle, thus reducing damage to the outer surface of the blood collection needle.

[0031] This utility model provides a blood collection needle holder to prevent port loosening. The specific working principle is as follows: When blood collection is required, one end of the blood collection needle is inserted into the cylinder 1 from one side of the positioning block 4. The blood collection needle is continuously moved until one end of the needle holder contacts the side wall of the limiting plate 21, initially restricting the position of the blood collection needle and maintaining a suitable length at the end extending outside the cylinder 1. At this time, the conical nut 5 is tightened. Guided by the external thread 31, the conical nut 5 moves along the outer surface of the clamping seat 3. Accompanying the tightening action of the conical nut 5 on the end of the clamping seat 3, the multiple expansion grooves 32 formed on the clamping seat 3 cause deformation of the multiple partition plates, thereby... The end of the clamping seat 3 retracts inward simultaneously, and the multiple spherical pads 33 provided on the clamping seat 3 contact the side wall of the blood collection needle. By relying on the deformation of the spherical pads 33 themselves, the force applied by the clamping seat 3 to the blood collection needle at various angles can be adjusted to ensure uniform force during clamping and avoid tilting after fixing. Finally, the positioning block 4 at the top of the clamping seat 3 abuts against the side wall of the blood collection needle. The rubber strip 41 provided on the positioning block 4 can increase the friction between it and the blood collection needle, further improving the stability of clamping and avoiding damage to the outer surface of the blood collection needle. The installation and fixing of the blood collection needle is completed by continuously turning the conical nut 5. The stability of the blood collection needle is maintained by the self-locking property formed between the external thread 31 and the thread groove 51.

[0032] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A blood collection needle holder with anti-loosening port, comprising a cylindrical body (1), characterized in that, An extension seat (11) is fixedly connected to the bottom of the cylinder (1), and a connecting seat (12) is fixedly connected to the upper end of the cylinder (1). A clamping seat (3) for installing blood collection needles is fixedly connected to the upper end of the connecting seat (12), and the diameter of the top of the clamping seat (3) is smaller than the diameter of the bottom of the clamping seat (3). An external thread (31) is provided on the side wall of the clamping seat (3). A tapered nut (5) is fitted on the threaded portion of the clamping seat (3) corresponding to the external thread (31), and the diameter of the top of the tapered nut (5) is smaller than the diameter of the bottom of the tapered nut (5). The tapered nut (5) works with the clamping seat (3) to achieve quick disassembly of the blood collection needle. An assembly plate (52) is fixedly connected to the top of the tapered nut (5), and a reinforcing plate (53) is fixedly connected to the bottom of the tapered nut (5).

2. The blood collection needle holder for preventing port loosening according to claim 1, characterized in that, The inner top of the cylinder (1) is fixedly connected to an annular seat (2), and the diameter of the annular seat (2) is equal to the diameter of the through groove opened at the top of the cylinder (1). A limiting plate (21) is fixedly connected to the bottom of the annular seat (2), and the diameter of the limiting plate (21) is smaller than the diameter of the annular seat (2).

3. A blood collection needle holder for preventing port loosening according to claim 1, characterized in that, The inner wall of the tapered nut (5) is provided with a threaded groove (51), and the size of the threaded groove (51) corresponds to the size of the external thread (31).

4. A blood collection needle holder for preventing port loosening according to claim 1, characterized in that, The clamping seat (3) is provided with partition plates separated by multiple expansion grooves (32) opened in the circumferential direction, and each partition plate is provided with a spherical pad (33) on its top.

5. A blood collection needle holder for preventing port loosening according to claim 4, characterized in that, Each of the partition plates has a positioning block (4) fixedly connected to its top, and the positioning blocks (4) are all vertically arranged relative to the cylinder (1).

6. A blood collection needle holder for preventing port loosening according to claim 5, characterized in that, Multiple adhesive strips (41) are respectively provided on the side wall of the positioning block (4).

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