Welding jig for bone marrow puncture needle

Abstract

The utility model relates to a welding jig for a bone marrow puncture needle, and relates to the technical field of medical instrument welding. The positioning device comprises an abutting block and a positioning block which are oppositely arranged, the abutting block is provided with a supporting groove, the groove wall of the supporting groove is matched with the side wall of the needle handle, the positioning block is provided with a positioning groove in the length direction of the positioning block, the groove wall of the positioning groove is matched with the side wall of the needle body, and the supporting groove and the positioning groove are coaxially arranged. During welding, the needle handle is placed on the supporting groove of the abutting block, then the needle body is placed on the positioning groove of the positioning block, the needle handle and the needle body are coaxially arranged, the end of the needle handle is attached to the end of the needle body, and then a laser welding machine is used for welding the joint of the needle handle and the needle body. Compared with a mode of manually positioning the needle handle and the needle body in the prior art, the positioning mode provided by the utility model is higher in stability.

Description

Technical Field

[0001] This application relates to the field of medical device welding technology, and in particular to a welding fixture for bone marrow aspiration needles. Background Technology

[0002] A bone marrow aspiration needle is a common clinical medical device for obtaining bone marrow samples. Currently, the diagnosis of many hematopoietic system diseases requires the use of a bone marrow aspiration needle.

[0003] The bone marrow aspiration needle used in clinical practice mainly consists of a handle and a body. Since the handle and body are not formed in one piece, they need to be welded together.

[0004] In related technologies, the joint between the needle handle and the needle body is usually aligned and positioned manually before welding. Due to the instability of manual positioning, inaccurate welds and needle body tilting are common problems, leading to rework and significantly increasing costs. Utility Model Content

[0005] To address the instability inherent in manually positioning the needle handle and body, this application provides a welding fixture for bone marrow aspiration needles.

[0006] The welding fixture for bone marrow aspiration needles provided in this application adopts the following technical solution:

[0007] A welding fixture for a bone marrow aspiration needle includes an abutment block and a positioning block arranged opposite to each other. The abutment block is provided with a support groove, the groove wall of which matches the side wall of the needle handle. The positioning block is provided with a positioning groove along its own length, the groove wall of which matches the side wall of the needle body. The support groove and the positioning groove are coaxially arranged.

[0008] By adopting the above technical solution, the needle handle is placed on the support groove of the abutment block, and then the needle body is placed on the positioning groove of the positioning block, so that the needle handle and the needle body are coaxially arranged and the ends of the needle handle and the needle body are attached. Then, a laser welding machine is used to weld the joint of the needle handle and the needle body. Compared with the method of manually positioning the needle handle and the needle body in related technologies, the positioning method of this application has higher stability.

[0009] Optionally, the abutting block is provided with an abutting surface, which abuts against the end face of the needle handle away from the needle body. The groove wall of the positioning groove extends to provide a positioning piece opposite to the abutting surface. The length direction of the positioning piece is perpendicular to the length direction of the positioning block. The periphery of the needle body is provided with an installation groove for the positioning piece to be fitted and inserted.

[0010] By adopting the above technical solution, the needle handle and needle body can be relatively fixed, so that the needle handle and needle body are not easy to move away from each other during the welding process.

[0011] Optionally, the positioning block is provided with a reserved slot for the positioning piece to be inserted into.

[0012] By adopting the above technical solution, the positioning piece and the positioning block can be processed separately, thereby saving processing costs, and the reserved slot facilitates the quick installation of the positioning piece.

[0013] Optionally, the abutment block is fixedly provided with a guide rod, the axial direction of the guide rod is perpendicular to the length direction of the positioning piece, and the positioning block has an adjustment hole through it along its own length for the guide rod to be inserted. The positioning block can move along the axial direction of the guide rod towards or away from the abutment block.

[0014] By adopting the above technical solution, the guide rod helps the positioning block to always move along the axis of the guide rod, making it less likely for the positioning block to tilt as it moves closer to or away from the abutment block, thereby keeping the two end faces of the needle handle and the needle body joint parallel.

[0015] Optionally, the abutment block and the positioning block are connected to a tension spring, which is used to move the positioning block along the axial direction of the guide rod and toward the abutment block.

[0016] By adopting the above technical solution, the tension spring is used to move the positioning block along the axial direction of the guide rod and toward the abutment block, thereby pulling the abutment block and the positioning block together so that the ends of the needle handle and the needle body abut against each other, thus making the joint of the welded needle handle and the needle body more secure.

[0017] Optionally, both the abutment block and the positioning block are provided with hanging holes, and the two ends of the tension spring are provided with two hooks, which are respectively hung in the two hanging holes.

[0018] By adopting the above technical solution, the hook of the tension spring is hung in the hanging hole, which facilitates the installation of the tension spring.

[0019] Optionally, a base is provided below the abutting block and the positioning block, the abutting block is fixedly connected to the base, the base is provided with a sliding groove, the length direction of the sliding groove is consistent with the axial direction of the guide rod, and the positioning block is provided with a slider that can be adapted to be inserted into the sliding groove, the slider can slide along the length direction of the sliding groove.

[0020] By adopting the above technical solution, the positioning block can be installed by setting a base, so that the abutment block and the positioning block are on the same horizontal plane; the positioning block slides along the length of the slide groove with the slider, so that the positioning block moves more smoothly along the axis of the guide rod, which helps to adjust the relative position of the positioning block and the abutment block.

[0021] Optionally, a stop block is provided at the end of the slide away from the abutment block, and the positioning block is located between the abutment block and the stop block.

[0022] By adopting the above technical solution, the stop block can block one side of the positioning block, and the stop block can prevent the positioning block from slipping off the slide groove, so that the positioning block always slides along the length direction of the slide groove.

[0023] Optionally, a handle is provided at the end of the abutment block away from the positioning block.

[0024] By adopting the above technical solution, it is easier to place the welding fixture onto the laser welding machine.

[0025] Optionally, the abutment block is provided with an insertion rod, one end of which is inserted through the abutment block and into the end of the needle handle away from the needle body.

[0026] By adopting the above technical solution, the insertion rod can fix the abutment block and the needle handle, making it difficult for the needle handle to slide relative to the abutment surface.

[0027] In summary, this application includes at least one of the following beneficial effects:

[0028] 1. The support groove and the positioning groove are coaxially arranged. The needle handle is placed on the support groove of the abutment block, and then the needle body is placed on the positioning groove of the positioning block, so that the needle handle and the needle body are coaxially arranged and the ends of the needle handle and the needle body are attached. Then, the joint of the needle handle and the needle body is welded using a laser welding machine. Compared with the method of manually positioning the needle handle and the needle body in related technologies, the positioning method of this application has higher stability.

[0029] 2. The abutment block and the positioning block are connected by a tension spring. The tension spring is used to move the positioning block along the axis of the guide rod and toward the abutment block, thereby pulling the abutment block and the positioning block together so that the ends of the needle handle and the needle body are pressed together, thus making the joint of the welded needle handle and the needle body more secure.

[0030] 3. A stop is provided at the end of the slide groove away from the abutment block, which can block one side of the positioning block and prevent the positioning block from slipping off the slide groove. Attached Figure Description

[0031] Figure 1This is a schematic diagram illustrating the structure of the bone marrow aspiration needle in the embodiments of this application;

[0032] Figure 2 This is a schematic diagram of the structure of an embodiment of this application;

[0033] Figure 3 This is a structural diagram illustrating the connection relationship between the abutment block and the positioning block in an embodiment of this application;

[0034] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0035] Figure 5 This is a structural diagram illustrating the connection relationship between the positioning block and the base in an embodiment of this application.

[0036] In the diagram: 1. Abutment block; 11. Support groove; 12. Abutment surface; 13. Guide rod; 14. Insert rod; 2. Positioning block; 21. Positioning groove; 22. Positioning piece; 23. Reserved groove; 24. Adjustment hole; 25. Hanging rod; 251. Hanging hole; 26. Sliding block; 3. Needle handle; 4. Needle body; 41. Mounting groove; 5. Tensioning spring; 51. Hook; 6. Base; 61. Slide groove; 62. Stop block; 7. Handle. Detailed Implementation

[0037] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0038] The needle handle and needle body welded in the embodiments of this application refer to... Figure 1 As shown, the end face of the needle handle 3 away from the needle body 4 is an inclined surface, and the needle body 4 is a hollow tubular structure. During the welding process, the joint of the needle handle 3 and the needle body 4 needs to be welded together.

[0039] This application discloses a welding fixture for bone marrow aspiration needles. (See also...) Figure 2 and Figure 4The welding fixture for bone marrow aspiration needles includes abutment block 1 and positioning block 2 arranged opposite to each other. Abutment block 1 and positioning block 2 are integrally formed. A support groove 11 is formed on the top wall of abutment block 1 near the end of positioning block 2. The cross-section of support groove 11 is arc-shaped. The groove wall of support groove 11 matches the side wall of needle handle 3. A positioning groove 21 is formed on the top wall of positioning block 2 along its own length direction. The cross-section of positioning groove 21 is arc-shaped. The groove wall of positioning groove 21 matches the side wall of needle body 4. Support groove 11 and positioning groove 21 are coaxially arranged. The needle handle 3 is placed on the support groove 11 of the abutment block 1, and then the needle body 4 is placed on the positioning groove 21 of the positioning block 2, so that the needle handle 3 and the needle body 4 are coaxially arranged and the ends of the needle handle 3 and the needle body 4 are attached together. Then, the joint of the needle handle 3 and the needle body 4 is welded using a laser welding machine. Compared with the method of manually positioning the needle handle 3 and the needle body 4 in related technologies, the positioning method of this application has higher stability.

[0040] Reference Figure 3 and Figure 4 A handle 7 is fixedly provided at the end of the abutment block 1 away from the positioning block 2. A rod 14 is inserted through the end of the abutment block 1 away from the positioning block 2. The end of the rod 14 that passes through the abutment block 1 is inserted into the end of the needle handle 3 away from the needle body 4. An abutment surface 12 is provided on the side of the abutment block 1 close to the positioning block 2. The inclination of the abutment surface 12 is the same as that of the end face of the needle handle 3 away from the needle body 4, and the abutment surface 12 abuts against the end face of the needle handle 3 away from the needle body 4. A positioning piece 22 is provided on the groove wall of the positioning groove 21, which is opposite to the abutment surface 12. The positioning block 2 has a reserved groove 23 for the positioning piece 22 to be inserted. The length direction of the positioning piece 22 is perpendicular to the length direction of the positioning block 2. An installation groove 41 for the positioning piece 22 to be inserted is provided on the periphery of the needle body 4. First, place the needle handle 3 in the support groove 11, so that the end face of the needle handle 3 away from the needle body 4 is in contact with the abutment surface 12, and insert the insertion rod 14 into the end of the needle handle 3 away from the needle body 4. Then, place the needle body 4 in the positioning groove 21, so that the ends of the needle handle 3 and the needle body 4 are in contact, and insert the positioning piece 22 of the needle body 4 into the mounting groove 41. This fixes the needle handle 3 and the needle body 4 relatively, so that the needle handle 3 and the needle body 4 are not easy to move away from each other during the welding process.

[0041] Reference Figure 4 and Figure 5A guide rod 13 is fixedly inserted through the abutment block 1. The guide rod 13 is horizontally positioned, and its axis is perpendicular to the length direction of the positioning piece 22. An adjustment hole 24 for inserting the guide rod 13 is provided through the positioning block 2 along its own length. The positioning block 2 can move closer to or further away from the abutment block 1 along the axis of the guide rod 13. By setting the guide rod 13, the positioning block 2 can always move along the axis of the guide rod 13, making it less likely to tilt during the movement closer to or further away from the abutment block 1, thereby keeping the two end faces of the needle handle 3 and the needle body 4 joint parallel.

[0042] A tension spring 5 is connected to the abutment block 1 and the positioning block 2. A hanging rod 25 is fixedly connected to both the abutment block 1 and the positioning block 2 on the same side. Both hanging rods 25 have hanging holes 251. Two hooks 51 are integrally formed at both ends of the tension spring 5, and the two hooks 51 are respectively hung in the two hanging holes 251. The tension spring 5 is used to move the positioning block 2 along the axis of the guide rod 13 towards the abutment block 1, thereby tightening the abutment block 1 and the positioning block 2 together, so that the ends of the needle handle 3 and the needle body 4 are pressed together, thus making the joint of the welded needle handle 3 and needle body 4 more secure.

[0043] Reference Figure 5 A base 6 is provided below the abutment block 1 and the positioning block 2. The base is horizontally positioned, and the bottom end of the abutment block 1 is fixedly connected to the top end of the base 6. A groove 61 is formed on the top wall of the base 6 along its length, and the length direction of the groove 61 is consistent with the axis of the guide rod 13. The bottom of the positioning block 2 is integrally formed with a slider 26 that can be inserted into the groove 61. The slider 26 can slide along the length direction of the groove 61. A stop 62 is provided at the end of the groove 61 away from the abutment block 1. The stop 62 is fixedly installed on the base 6, and the positioning block 2 is located between the abutment block 1 and the stop 62. By setting the base 6, the positioning block 2 can be installed so that the abutment block 1 and the positioning block 2 are on the same horizontal plane. The positioning block 2 slides along the length direction of the groove 61 with the slider 26, so that the positioning block 2 moves more smoothly along the axis of the guide rod 13, which helps to adjust the relative position of the positioning block 2 and the abutment block 1. The stop block 62 can block one side of the positioning block 2, and the stop block 62 can prevent the positioning block 2 from slipping off the slide groove 61, so that the positioning block 2 always slides along the length direction of the slide groove 61.

[0044] The implementation principle of a welding fixture for a bone marrow aspiration needle in this application embodiment is as follows: the needle handle 3 is placed on the support groove 11 of the abutment block 1, and then the needle body 4 is placed on the positioning groove 21 of the positioning block 2, so that the needle handle 3 and the needle body 4 are coaxially arranged and the ends of the needle handle 3 and the needle body 4 are attached to each other. Then, a laser welding machine is used to weld the joint of the needle handle 3 and the needle body 4. Compared with the method of manually positioning the needle handle 3 and the needle body 4 in related technologies, the positioning method of this application has higher stability.

[0045] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A welding fixture for bone marrow aspiration needles, characterized in that: It includes a contact block (1) and a positioning block (2) arranged opposite to each other. The contact block (1) is provided with a support groove (11). The groove wall of the support groove (11) matches the side wall of the needle handle (3). The positioning block (2) is provided with a positioning groove (21) along its own length direction. The groove wall of the positioning groove (21) matches the side wall of the needle body (4). The support groove (11) and the positioning groove (21) are coaxially arranged.

2. The welding fixture for bone marrow aspiration needle according to claim 1, characterized in that: The abutting block (1) is provided with an abutting surface (12), which abuts against the end face of the needle handle (3) away from the needle body (4). The groove wall of the positioning groove (21) extends to provide a positioning piece (22) opposite to the abutting surface (12). The length direction of the positioning piece (22) is perpendicular to the length direction of the positioning block (2). The periphery of the needle body (4) is provided with an installation groove (41) for the positioning piece (22) to be fitted and inserted.

3. The welding fixture for bone marrow aspiration needle according to claim 2, characterized in that: The positioning block (2) is provided with a reserved slot (23) for the positioning piece (22) to be inserted.

4. The welding fixture for bone marrow aspiration needle according to claim 2, characterized in that: The abutment block (1) is fixedly provided with a guide rod (13). The axial direction of the guide rod (13) is perpendicular to the length direction of the positioning piece (22). The positioning block (2) has an adjustment hole (24) through it along its own length direction for the guide rod (13) to be inserted. The positioning block (2) can move along the axial direction of the guide rod (13) towards or away from the abutment block (1).

5. The welding fixture for bone marrow aspiration needle according to claim 4, characterized in that: The abutment block (1) and the positioning block (2) are connected to a tension spring (5), which is used to move the positioning block (2) along the axial direction of the guide rod (13) and toward the abutment block (1).

6. The welding fixture for bone marrow aspiration needle according to claim 5, characterized in that: Both the abutment block (1) and the positioning block (2) are provided with hanging holes (251), and the two ends of the tension spring (5) are provided with two hooks (51), and the two hooks (51) are respectively hung in the two hanging holes (251).

7. The welding fixture for bone marrow aspiration needle according to claim 4, characterized in that: A base (6) is provided below the abutting block (1) and the positioning block (2). The abutting block (1) is fixedly connected to the base (6). The base (6) has a sliding groove (61). The length direction of the sliding groove (61) is consistent with the axial direction of the guide rod (13). The positioning block (2) is provided with a slider (26) that can be fitted into the sliding groove (61). The slider (26) can slide along the length direction of the sliding groove (61).

8. The welding fixture for bone marrow aspiration needle according to claim 7, characterized in that: The end of the slide (61) away from the abutment block (1) extends upward and is provided with a stop block (62), and the positioning block (2) is located between the abutment block (1) and the stop block (62).

9. The welding fixture for bone marrow aspiration needle according to claim 1, characterized in that: A handle (7) is provided at the end of the abutment block (1) away from the positioning block (2).

10. The welding fixture for bone marrow aspiration needle according to claim 1, characterized in that: The abutment block (1) is provided with a rod (14), and one end of the rod (14) is inserted into the end of the needle handle (3) away from the needle body (4).

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