Needle holder and sample needle mounting structure

Abstract

The utility model discloses a needle holder and a sample needle mounting structure, and belongs to the field of automatic micromachining, one end of a main body of the needle holder is an insertion end, a guide hole in the main body is communicated with a mounting hole, the guide hole and the mounting hole are coaxially arranged, the diameter of the mounting hole is larger than that of the guide hole, and the guide hole is located between the insertion end and the mounting hole. The needle holder further comprises an elastic tube and a fastener, the elastic tube is installed in the installation hole and positioned through the fastener, the elastic tube is located at the end, away from the insertion end, of the main body, and the elastic tube tightly holds the sample needle inserted from the insertion end. The elastic tube is inserted into the rear section of the elastic tube and is tightly held by the elastic tube, so that the operation is convenient and the breakage is not easy; the guide hole guides the sample needle to ensure the coaxiality of the sample needle and the needle holder; when the sample needle is too long, the sample needle can penetrate through the elastic tube and the hollow fastener, so that the needle holder is suitable for sample needles with different lengths.

Description

Technical Field

[0001] This utility model relates to the field of automated micromachining, and in particular to a needle holder. Background Technology

[0002] In in vitro fertilization (IVF) procedures such as nuclear transfer, capillary glass tubes are widely used for various micromanipulations, including sperm injection and oocyte processing. These procedures require capillary glass tubes to have specific shapes and sizes to ensure accuracy and effectiveness. To meet these requirements, capillary glass tubes often need to undergo calcination treatment.

[0003] During the calcination process of capillary glass tubes, a needle holder is required to clamp the tube, suspending its end for deformation during calcination. Existing needle holders have a relatively flexible front end, resulting in an unstable needle position after insertion, and significant deviations between the needle's axis and the holder's axis, affecting the processing accuracy of the capillary glass tube. Furthermore, the silicone tube of the needle holder is located near the insertion end. Once the needle enters the insertion end, it quickly enters the silicone tube, where strong and difficult-to-control damping occurs. Therefore, when the needle is long, inserting most of it results in a long and laborious insertion and removal process, increasing the risk of breakage due to improper force. If only a small portion is inserted, the needle tip deviates significantly from the holder's axis, severely impacting the efficiency of subsequent position adjustments. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, one of the objectives of this utility model is to provide a needle holder that has high coaxiality between the sample needle and the needle holder during use, makes it easy to insert and remove the sample needle, and is not easy to break.

[0005] In order to overcome the shortcomings of the prior art, the second objective of this utility model is to provide a sample needle mounting structure that has high coaxiality between the sample needle and the needle holder, makes sample needle insertion and removal easy, and is not easily broken.

[0006] One of the objectives of this utility model is achieved through the following technical solution:

[0007] A needle holder includes a main body and an elastic tube. One end of the main body is an insertion end. The main body has a guide hole and a mounting hole inside. The guide hole communicates with the mounting hole and is coaxially arranged with the mounting hole. The diameter of the mounting hole is larger than the diameter of the guide hole. The guide hole is located between the insertion end and the mounting hole. The needle holder also includes an elastic tube and a fastener. The elastic tube is installed in the mounting hole and positioned by the fastener. The elastic tube is located at the end of the main body away from the insertion end. The elastic tube holds the sample needle inserted from the insertion end.

[0008] Furthermore, the mounting hole is a threaded hole, and the fastener has an external thread. The fastener cooperates with the threaded hole to position the elastic tube.

[0009] Furthermore, a boss is formed at the end of the mounting hole, and both ends of the elastic tube abut against the boss and the fastener, respectively.

[0010] Furthermore, the main body is provided with a through hole, the diameter of which is smaller than the diameter of the mounting hole. The through hole is located between the guide hole and the mounting hole, and the through hole is coaxial with the mounting hole. The boss is formed at the connection between the through hole and the mounting hole.

[0011] Furthermore, the elastic tube has a hollow structure with a through hole inside, the fastener has a hollow structure with a through hole inside, and the elastic tube and the fastener are coaxial.

[0012] Furthermore, the elastic tube is a silicone tube.

[0013] Furthermore, the outer surface of the main body is provided with a snap-fit ​​groove.

[0014] Furthermore, the snap-fit ​​groove is annular.

[0015] The second objective of this utility model is achieved by the following technical solution:

[0016] The sample needle mounting structure includes a sample needle and any of the above-mentioned needle holders. The sample needle portion is mounted on the needle holder, and the end of the sample needle extends out of the insertion end and is suspended in the air. The guide hole is clearance-fitted with the sample needle, and the elastic tube holds the sample needle tightly.

[0017] Furthermore, the sample needle mounting structure also includes a rotating shaft, which includes a shaft body and a spring plunger mounted on the shaft body. The needle holder is at least partially mounted on the rotating shaft and coaxially arranged with the rotating shaft. The spring plunger engages with a snap-fit ​​groove on the outer wall of the needle holder to axially position the needle holder.

[0018] Compared to existing technologies, the main body of this utility model needle holder has an insertion end at one end. The main body contains a guide hole and a mounting hole, which are connected and coaxially arranged. The diameter of the mounting hole is larger than that of the guide hole. The guide hole is located between the insertion end and the mounting hole. The needle holder also includes an elastic tube and a fastener. The elastic tube is installed in the mounting hole and positioned by the fastener. The elastic tube is located at the end of the main body furthest from the insertion end. The elastic tube holds the sample needle inserted from the insertion end. Through this design, after the sample needle is inserted into the needle holder, it passes through the front and middle sections with almost no damping, inserts into the elastic tube in the rear section, and is held tightly by the elastic tube. This design is convenient to operate and less prone to breakage. The guide hole guides the sample needle, ensuring coaxiality between the sample needle and the needle holder. When the sample needle is too long, it can pass through the elastic tube and the hollow fastener, making the needle holder suitable for sample needles of different lengths. Attached Figure Description

[0019] Figure 1 This is a perspective view of the needle holder of this utility model;

[0020] Figure 2 for Figure 1 3D exploded view of the needle holder;

[0021] Figure 3 for Figure 2 A three-dimensional sectional view of the main body of the needle holder;

[0022] Figure 4 for Figure 1 A three-dimensional sectional view of the needle holder;

[0023] Figure 5 for Figure 1 A 3D view of the needle holder in use;

[0024] Figure 6 for Figure 5 A three-dimensional sectional view of the needle holder in use.

[0025] In the diagram: 100, needle holder; 10, main body; 11, insertion end; 12, connecting part; 13, extension part; 130, snap-fit ​​groove; 14, guide hole; 15, through hole; 16, mounting hole; 17, boss; 20, elastic tube; 30, fastener; 40, sample needle; 50, rotating shaft; 51, shaft body; 52, spring plunger; 520, plunger head; 521, elastic element; 522, snap-fit ​​element. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or it can be fixed through another intermediate component. When a component is said to be "connected to" another component, it can be directly connected to the other component or it may be fixed through another intermediate component. When a component is said to be "set on" another component, it can be set directly on the other component or it may be set through another intermediate component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0029] The needle holder 100 of this utility model is used to install the sample needle 40, so that the tip of the sample needle 40 is moved to a preset position for heating and bending to process it into the required shape and size.

[0030] Please see Figure 1 as well as Figure 2 The needle holder 100 includes a main body 10, an elastic tube 20, and a fastener 30.

[0031] Please see Figure 2 as well as Figure 3The main body 10 is cylindrical and hollow. It includes an insertion end 11, a connecting portion 12, and an extension portion 13. Both the insertion end 11 and the extension portion 13 are cylindrical, with the outer diameter of the insertion end 11 being smaller than that of the extension portion 13, facilitating operator identification of the insertion end 11's position. Specifically, the insertion end 11 has a diameter of 2.5 mm, and the extension portion 13 has a diameter of 4 mm. The connecting portion 12 connects to both the insertion end 11 and the extension portion 13 at its two ends, and is tapered. The outer wall of the extension portion 13 has a locking groove 130, which engages with the spring plunger 52 of the rotating shaft 50 to axially position the needle holder 100 when installed on the rotating shaft 50. In this embodiment, the locking groove 130 is annular, allowing the needle holder 100 to engage at any installation angle when installed inside the rotating shaft 50. There are multiple snap-fit ​​slots 130, which are spaced apart along the axis of the main body 10, so that the user can judge the depth of the needle holder 100 inserted into the rotating shaft 50 by the vibration and sound generated by the snap-fit.

[0032] The main body 10 has a guide hole 14, a through hole 15, and a mounting hole 16 arranged sequentially from the insertion end 11 to the extension 13. The guide hole 14, through hole 15, and mounting hole 16 are interconnected and coaxially arranged. The diameter of the guide hole 14 is slightly larger than the diameter of the sample needle 40, allowing for a clearance fit between the sample needle 40 and the guide hole 14. The diameter of the through hole 15 is larger than the diameter of the guide hole 14; the through hole 15 is designed to reduce machining difficulty. The diameter of the mounting hole 16 is larger than the diameter of the through hole 15, and a boss 17 is formed at the connection between the mounting hole 16 and the through hole 15. The boss 17 is used to mount the elastic tube 20. The diameter of the elastic tube 20 is larger than the diameter of the mounting hole 16, causing the elastic tube 20 to be compressed and deformed when installed in the mounting hole 16, achieving circumferential positioning. Specifically, the mounting hole 16 is a threaded hole for easy fixing of the fastener 30.

[0033] Please continue reading. Figure 4 The elastic tube 20 is made of an elastic material. When compressed, the elastic tube 20 contracts and holds the sample needle 40 tightly. In this embodiment, the elastic tube 20 is made of silicone. The elastic tube 20 has an axial through hole, allowing the sample needle 40 to pass through the elastic tube 20 when it is long. The middle and rear sections of the sample needle 40 are held tightly by the elastic tube 20, making the needle holder 100 suitable for sample needles 40 of different lengths and enhancing the versatility of the needle holder 100.

[0034] Fastener 30 is fixedly installed in mounting hole 16, pressing against elastic tube 20 to axially position elastic tube 20. In this embodiment, fastener 30 is a set screw. Fastener 30 has an axial through hole, so that when sample needle 40 is long, sample needle 40 can pass through fastener 30.

[0035] Please continue reading. Figure 5 as well as Figure 6When using the needle holder 100, the sample needle 40 is inserted into the needle holder 100 through the guide hole 14 at the insertion end 11. The end of the guide hole 14 is chamfered to facilitate the insertion of the sample needle 40. The sample needle 40 passes through the guide hole 14 at the front and the through hole 15 at the middle with almost no damping, and is inserted into the elastic tube 20 at the rear, where it is held in place. If the sample needle 40 is too long, it can pass through the elastic tube 20 and the hollow fastener 30. The total length of the sample needle 40 and the needle holder 100 should be adjusted within the tooling limits. The needle holder 100 is mounted on the shaft 51 of the rotating shaft 50. A spring plunger 52 is mounted on the side wall of the shaft 51. Each spring plunger 52 includes a plunger head 520, an elastic element 521, and a locking element 522. The plunger head 520 is mounted on the side wall of the shaft 51. The elastic element 521 is housed within the plunger head 520, and its two ends are fixedly connected to the locking element 522 and the plunger head 520, respectively, so that the locking element 522 is elastically mounted on the plunger head 520. In this embodiment, the elastic element 521 is a spring, and the locking element 522 is a ball bearing.

[0036] The guide hole 14 at the front of the needle holder 100 is a precision-machined positive tolerance hole. Its 10mm length can effectively ensure that the axis of the sample needle 40 is basically coincident with the outer diameter axis of the needle holder 100. Secondly, the elastic tube 20 is tightly held at the rear or middle rear section of the sample needle 40. Therefore, the length with greater damping during actual insertion and removal is shorter, making the operation convenient and quick. Thirdly, the positioning requirements of the fastener 30 for the elastic tube 20 are low. It is only necessary to roughly limit the axial movement range of the elastic tube 20, as long as it is ensured that the elastic tube 20 will not be pushed out of the needle holder 100 by the sample needle 40. Fourthly, the two snap-fit ​​slots 130 and the spring plunger 52 of the rotating shaft 50 can realize the axial positioning of the needle holder 100 in the automatic capillary rotation mechanism. This ensures that when the automatic rotation mechanism moves along the axis of the needle holder to a fixed coordinate, the sample needle 40 appears in the microscope field of view. It can also be used for auxiliary positioning in a manual needle holder to roughly determine the relative position between the needle holder 100 and the mounting base.

[0037] The structure of the needle holder 100 in this application optimizes the operation process of loading the sample needle 40 into the needle holder 100, reduces the damping and failure risk during operation, improves the coaxiality between the needle holder 100 and the sample needle 40, and adds an axial positioning structure.

[0038] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the concept of this utility model. These are all equivalent modifications and improvements made to the above embodiments based on the essential technology of this utility model, and all of these fall within the protection scope of this utility model.

Claims

1. Needle holder comprising a main body and an elastic tube, characterized in that: One end of the main body is an insertion end. The main body has a guide hole and a mounting hole inside. The guide hole communicates with the mounting hole and is coaxially arranged with the mounting hole. The diameter of the mounting hole is larger than the diameter of the guide hole. The guide hole is located between the insertion end and the mounting hole. The needle holder also includes an elastic tube and a fastener. The elastic tube is installed in the mounting hole and positioned by the fastener. The elastic tube is located at the end of the main body away from the insertion end. The elastic tube holds the sample needle inserted from the insertion end.

2. The needle holder of claim 1, wherein: The mounting hole is a threaded hole, and the fastener has an external thread. The fastener cooperates with the threaded hole to position the elastic tube.

3. The needle holder of claim 2, wherein: A boss is formed at the end of the mounting hole, and both ends of the elastic tube abut against the boss and the fastener, respectively.

4. The needle holder of claim 3, wherein: The main body is also provided with a through hole, the diameter of which is smaller than the diameter of the mounting hole. The through hole is located between the guide hole and the mounting hole. The through hole is coaxial with the mounting hole, and the boss is formed at the connection between the through hole and the mounting hole.

5. The needle holder of claim 1, wherein: The elastic tube has a hollow structure with a through hole inside. The fastener has a hollow structure with a through hole inside. The elastic tube and the fastener are coaxial.

6. The needle holder of claim 1, wherein: The elastic tube is a silicone tube.

7. The needle holder of claim 1, wherein: The outer surface of the main body is provided with a snap-fit ​​groove.

8. The needle holder of claim 7, wherein: The buckle groove is circular.

9. A sample needle mounting structure comprising a sample needle, characterized by: It also includes a needle holder as described in any one of claims 1-8, wherein the sample needle portion is mounted on the needle holder, the end of the sample needle extends out from the insertion end and is suspended, the guide hole is clearance-fitted with the sample needle, and the elastic tube holds the sample needle tightly.

10. The sample needle mounting structure of claim 9, wherein: The sample needle mounting structure also includes a rotating shaft, which includes a shaft body and a spring plunger mounted on the shaft body. The needle holder is at least partially mounted on the rotating shaft and coaxially arranged with the rotating shaft. The spring plunger engages with a snap-fit ​​groove on the outer wall of the needle holder to axially position the needle holder.

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