Fixing structure of hollow needle and heating wire and electric heating needle
By applying pressure outside the hollow needle to form an indentation groove and a tightening projection, the problem of difficulty in fixing the heating wire and the hollow needle is solved, and firm connection and efficient production are achieved.
Patent Information
- Application Number
- CN202421042329.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-14
- Publication Date
- 2025-05-23
- Estimated Expiration
- 2034-05-14
AI Technical Summary
During the production process of existing electric heating needles, it is difficult to fix the heating wire and the hollow needle, resulting in failure of the electric heating needle. There are many processing steps and are difficult, which can easily lead to breaking of the heating wire.
通过在空心针的外部施加压力，使空心针产生形变并在其外壁形成凹槽，形成缩进槽和紧合凸起，夹定于发热丝外壁，使其与空心针内壁固定接合。
The firm connection between the heating wire and the hollow needle is achieved to prevent loosening, reduce the risk of the heating wire breakage, simplify the processing process, and improve production efficiency.
Smart Images
Figure CN222889187U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of electric heating needles / internal heating needles, in particular to a fixing structure of a hollow needle and a heating wire and an electric heating needle. Background Art
[0002] The electrothermal needle is mainly used for acupuncture treatment. The electrothermal needle is a hollow needle body with a heating element installed inside, and the heating element is usually a heating wire. The current electrothermal needle mainly adopts the form of extending the heating wire into the hollow needle until it is connected to the needle tip of the hollow needle, and then the heating wire and the outer wall of the hollow needle are connected to the positive and negative electrodes, and the hollow needle is heated through the passage for acupuncture treatment.
[0003] During the production process of electric heating needles, it is particularly important to firmly fix the heating wire and the hollow needle. If the head of the heating wire cannot be well connected and fixed with the needle tip of the hollow needle, the electric heating needle will fail. One end of the hollow needle is open and the other end is the needle tip, that is, closed, and the internal space of the hollow needle is very small, which makes it particularly difficult to fix the heating wire.
[0004] An existing fixing form is to first configure a hollow needle tube with both ends of the hollow needle tube open, then insert the heating wire into one end of the needle tube and extend it out from the other end, and then sharpen one of the ends of the needle tube to form a needle tip (i.e., seal it). In this way, the hollow needle and the heating wire are fixed during the sharpening process. However, since both the needle and the heating wire are very thin, this method has many processing steps, great processing difficulty, and long processing cycle, and it is easy for the heating wire to break during the sharpening process. Utility Model Content
[0005] The purpose of the utility model is to overcome the shortcomings of the prior art. By applying pressure to the outside of the hollow needle, the hollow needle is deformed and a groove is formed on its outer wall, so that the inner wall of the hollow needle and the heating wire are squeezed and fixed, so that the two are tightly connected and not easy to loosen, and are easy to batch process, thereby proposing a fixing structure of a hollow needle and a heating wire and an electric heating needle.
[0006] The utility model is realized by the following technical solutions:
[0007] A fixing structure of a hollow needle and a heating wire comprises a hollow needle and a heating wire extending into the hollow needle. The hollow needle has a retraction groove near a piercing section, the retraction groove is formed by extrusion, and a tightening protrusion corresponding to the position of the retraction groove is formed on the inner wall of the hollow needle. The tightening protrusion is clamped on the outer wall of the heating wire so that the heating wire is fixedly engaged with the inner wall of the hollow needle.
[0008] The technical solution is further configured as follows: the indentation groove has at least one.
[0009] The technical solution is further configured as follows: the number of the retracted grooves is two and they are symmetrically arranged.
[0010] The technical solution is further configured as follows: the outer diameter of the hollow needle is 0.2 mm-0.6 mm.
[0011] The technical solution is further configured as follows: the inner diameter of the hollow needle is 0.1 mm-0.35 mm.
[0012] The technical solution is further configured as follows: the outer diameter of the heating wire is 0.04 mm-0.1 mm.
[0013] The technical solution is further configured as follows: the heating wire is not covered with an insulating layer at a position corresponding to the tight-fitting protrusion.
[0014] An electric heating needle comprises the above-mentioned hollow needle and a fixing structure of a heating wire.
[0015] The utility model discloses a fixing structure of a hollow needle and a heating wire. Compared with the prior art:
[0016] The technical solution sets an indentation groove on the hollow needle near the insertion section. The indentation groove is formed by extrusion, so that the inner wall of the hollow needle is fixedly engaged with the heating wire, preventing the heating wire from loosening and firmly fixing the heating wire to the hollow needle, and the heating wire is not easy to break during the processing. Compared with the existing technology, the technical solution is reasonably designed and easy to mass process, which greatly improves the production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a cross-sectional view of the utility model.
[0018] The numbers and letters in the figure represent the corresponding component names:
[0019] Wherein: 100, hollow needle; 101, needle tube; 102, insertion section; 200, heating wire; 300, retraction groove; 400, tight-fitting protrusion. DETAILED DESCRIPTION
[0020] The technical solution of the utility model is further described below in conjunction with the accompanying drawings and through specific implementation methods. Among them, the accompanying drawings are only used for exemplary descriptions, and only represent schematic diagrams rather than physical drawings, and cannot be understood as limitations on this patent; in order to better illustrate the embodiments of the utility model, some parts of the accompanying drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the accompanying drawings may be omitted.
[0021] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "inner", "outer", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.
[0022] See also Figure 1As shown, a fixing structure of a hollow needle and a heating wire comprises a hollow needle 100 and a heating wire 200 extending into the hollow needle 100, wherein the hollow needle 100 comprises a needle tube 101 and a piercing section 102, wherein the piercing section 102 is a needle tip, and one end of the hollow needle 100 is open and the other end is closed, i.e., the piercing section 102 (needle tip) is closed, and the piercing section 102 is used to pierce the inside of the skin. In the technical solution, the hollow needle 100 is firstly processed in batches, i.e., the needle tip 102 (i.e., sealed) is formed by sharpening one end of the needle tube 100; a retracted groove 300 is provided near the piercing section on the hollow needle 100, and the retracted groove 300 is provided on the hollow needle 100. The inlet groove 300 is formed by extrusion, and a tight-fitting protrusion 400 corresponding to the position of the inlet groove 300 is formed on the inner wall of the needle tube 101. The tight-fitting protrusion 400 is clamped on the outer wall of the heating wire 200, so that the heating wire 200 is fixedly engaged with the inner wall of the needle tube 101; the inlet groove 300 is formed on the hollow needle 100 near the piercing section 102 by adopting the form of external force extrusion, that is, the inlet groove 300 is formed at the position of the needle tube 101 near the piercing section 102 (needle tip). The inlet groove 300 is a groove. Due to the extrusion action, the outer wall of the hollow needle 100 is deformed, so that the tight-fitting protrusion 400 is formed on the inner wall of the hollow needle 100. The tight-fitting protrusion 400 00 squeezes the heating wire 200, so that the inner wall of the hollow needle 100 is fixed to the heating wire 200, and the two are tightly connected and not easy to loosen; the technical solution forms the insertion section 102 (needle tip) by first sharpening one end of the needle tube 101, that is, the hollow needle 100 is first mass-produced, and then the heating wire 200 is inserted into the hollow needle 100, and then the inner wall of the hollow needle 100 is tightly connected to the heating wire 200 by squeezing, and the tight-fitting protrusion 400 forms a surface contact with the heating wire 200. This form is easy to mass-produce, and has low processing difficulty. The heating wire 200 is not easy to break, and the production efficiency is greatly improved. ; It is worth noting that the present technical solution uses an external force to squeeze the hollow needle 100, which can be achieved by fixing the hollow needle 100 and then providing an extrusion force to the hollow needle 100 through a stamping part (punch column, punch needle), so that the hollow needle 100 is deformed to produce a retracted groove 300; in addition, the retracted groove 300 can be an arc groove; as an extension, the present technical solution can also use a spinning method to form a retracted ring groove on the outside of the hollow needle 100, which can form a tight-fitting convex ring on the inner wall of the hollow needle 100 corresponding to the position of the retracted ring groove, and the tight-fitting convex ring is clamped on the outer wall of the heating wire 200, so that the heating wire 200 is fixedly engaged with the inner wall of the hollow needle 100.
[0023] See also Figure 1As shown, there is at least one retraction groove 300; as a preferred embodiment, the number of the retraction grooves 300 is two, and they are symmetrically arranged. The technical solution extrudes both sides of the outer wall of the hollow needle 100 at the same time, so that the inner wall of the hollow needle 100 and the heating wire 200 are fixed more firmly, and the extrusion on both sides at the same time is more conducive to processing.
[0024] As a preferred embodiment of the present technical solution, the outer diameter of the needle tube 101 is 0.2 mm-0.6 mm.
[0025] As a preferred embodiment of the present technical solution, the inner diameter of the needle tube 101 is 0.1 mm-0.35 mm.
[0026] As a preferred solution of the present technical solution, the outer diameter of the heating wire 200 is 0.04 mm-0.1 mm.
[0027] As a preferred embodiment of the present technical solution, the heating wire 200 is not covered with an insulating layer at a position corresponding to the tight-fitting protrusion 400; the heating wire 200 is an enameled wire, which is a conductor inside and has an insulating layer outside. Before the hollow needle 100 and the heating wire 200 are fixed, the insulating layer (paint removal) is first performed on the position of the heating wire 200 corresponding to the tight-fitting protrusion 400, and then the two are fixed, so as to prevent the existence of the insulating layer from causing the inability to form a path among the positive electrode, the hollow needle, the heating wire, and the negative electrode, thereby greatly reducing the defective rate.
[0028] Preferably, the hollow needle 100 is made of 304 stainless steel, the heating wire 200 is an enameled wire with an insulating layer on the outside and a conductor on the inside, the conductor is made of nickel-chromium wire, and the outer insulating layer is made of a polymer material, such as polyurethane, polyester, polyesterimide, polyimide, etc.
[0029] It is worth noting that since the retraction groove 300 is located on the hollow needle 100 close to the insertion section 102 (needle tip), which is only a few millimeters away from the needle tip, due to the presence of the heating wire 200, it will conduct heat through the hollow needle 100, that is, the needle tip will also heat up.
[0030] An electric heating needle comprises the above-mentioned hollow needle and heating wire fixing structure; the electric heating needle has the technical effect of the hollow needle and heating wire fixing structure.
[0031] The above are only preferred specific implementation methods of the utility model, but the protection scope of the utility model is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the utility model, who makes equivalent replacements or changes based on the technical scheme and utility model concept of the utility model, should be covered by the protection scope of the utility model.
[0032] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.
Claims
1. A fixing structure of a hollow needle and a heating wire, comprising a hollow needle (100) and a heating wire (200) extending into the hollow needle, characterized in that: The hollow needle (100) comprises a needle tube (101) and a piercing section (102). The hollow needle (100) has a retracted groove (300) at a position close to the piercing section. The retracted groove (300) is formed by extrusion, and a tight-fitting protrusion (400) corresponding to the position of the retracted groove (300) is formed on the inner wall of the hollow needle (100). The tight-fitting protrusion (400) is clamped on the outer wall of the heating wire (200), so that the heating wire (200) is fixedly connected to the inner wall of the hollow needle (100).
2. A fixing structure of a hollow needle and a heating wire according to claim 1, characterized in that: The indentation groove (300) has at least one.
3. A fixing structure of a hollow needle and a heating wire according to claim 2, characterized in that: The number of the retracted grooves (300) is two and they are symmetrically arranged.
4. The fixing structure of the hollow needle and the heating wire according to claim 1, characterized in that: The outer diameter of the needle tube (101) is 0.2 mm-0.6 mm.
5. The fixing structure of the hollow needle and the heating wire according to claim 1, characterized in that: The inner diameter of the needle tube (101) is 0.1 mm-0.35 mm.
6. The fixing structure of the hollow needle and the heating wire according to claim 1, characterized in that: The outer diameter of the heating wire (200) is 0.04 mm-0.1 mm.
7. The fixing structure of the hollow needle and the heating wire according to claim 1, characterized in that: The heating wire (200) is not covered with an insulating layer at a position corresponding to the tight-fitting protrusion (400).
8. An electrothermal needle, characterized in that: The invention comprises a fixing structure of a hollow needle and a heating wire as described in any one of claims 1 to 7.