A water-light needle device with adjustable needle tip extension length

Abstract

This disclosure relates to a hyaluronic acid injection device with adjustable needle tip extension length, including an adjusting rod and an adjusting cover; one of the adjusting rod and the adjusting cover is provided with a thread, and the corresponding other is provided with a protruding structure that can move within the thread groove of the thread. According to the hyaluronic acid injection device of this disclosure, the needle tip extension scale can be accurately identified to adjust the required needle tip extension length.

Description

Technical Field

[0001] The embodiments disclosed herein relate to the field of medical devices, and more particularly to a water-light acupuncture device with adjustable needle tip extension length. Background Technology

[0002] Before using a mesotherapy treatment, it's necessary to select an appropriate needle length based on skin thickness and control the insertion depth. The needle length affects the absorption of the mesotherapy solution, and an improperly chosen needle length can lead to leakage. The needle length is adjusted by changing the relative position of the adjustment cap and lever on the mesotherapy needle. The adjustment of the cap and lever is achieved through a screw mechanism. After adjustment, the needle length is indicated by markings on the outer casing or adjustment cap.

[0003] In the prior art, the adjusting cover and the adjusting rod typically each have multiple turns of thread, as shown in Figure 1 and... Figure 2 As shown, the adjusting cover and the adjusting rod can rotate multiple times. However, when adjusting by rotating back and forth, if the rotation angle exceeds one full turn, the operator will often get confused when identifying the scale. Utility Model Content

[0004] To alleviate or solve at least one aspect or point of the above problems, this disclosure provides a water-light needle device with adjustable needle tip extension length, comprising: an adjustment rod and an adjustment cover;

[0005] One of the adjusting rod and the adjusting cover is provided with a thread, and the corresponding other is provided with a protrusion structure that can move within the thread groove of the thread.

[0006] Optionally, a limiting surface is provided in the threaded groove to restrict further movement of the protrusion structure.

[0007] Optionally, the limiting surface includes a first limiting surface and a second limiting surface, wherein the first limiting surface is located at one end of the thread and the second limiting surface is located at the other end of the thread.

[0008] Optionally, the first limiting surface and the second limiting surface are configured such that the maximum circumferential rotation angle of the protrusion structure within the threaded groove is 360°.

[0009] Optionally, the vertical distance between the first limiting surface and the second limiting surface in the axial direction is 1 to 2 thread pitches.

[0010] Optionally, one end of the thread is provided with a slotted structure suitable for the protrusion structure to enter the thread groove.

[0011] Optionally, the number of both the protruding structure and the slotted structure is at least two.

[0012] Optionally, the length of the protrusion structure in the circumferential direction is 0.5 to 4 mm.

[0013] Optionally, the adjusting rod is provided with threads, and the inner wall of the adjusting cover is provided with a radially inward protruding protrusion; or the inner wall of the adjusting cover is provided with threads, and the adjusting rod is provided with a radially outward protruding protrusion.

[0014] Optionally, the adjusting rod is provided with threads, and the inner wall of the adjusting cover is provided with a radially inward protruding protrusion structure, and groove structures are provided on both sides of the inner wall surface where the protrusion structure is located. Attached Figure Description

[0015] Figure 1(a) and Figure 1(b) are schematic diagrams of the adjustment cover structure with multiple threads in the prior art;

[0016] Figure 2 This is a schematic diagram of the assembly structure of an adjusting cover with multiple threads and an adjusting rod with multiple threads in the prior art;

[0017] Figure 3 This is a schematic diagram of the overall structure of a water-light needle device according to an embodiment of the present invention;

[0018] Figure 4 and Figure 5 This is a perspective view of the adjusting rod according to an embodiment of the present invention from different angles;

[0019] Figure 6 This is a cross-sectional schematic diagram of an adjusting rod according to an embodiment of the present invention;

[0020] Figure 7 This is a perspective view of an adjusting cover according to an embodiment of the present invention;

[0021] Figure 8 This is a top view of the adjusting cover according to an embodiment of the present invention;

[0022] Figure 9 This is a schematic diagram of the assembly structure of the adjusting rod and the adjusting cover according to an embodiment of the present invention.

[0023] In the picture:

[0024] 10. Adjusting rod;

[0025] 11. Thread, 12. Thread groove, 13. First limiting surface, 14. Second limiting surface, 15. Slotting;

[0026] 20. Adjustable cover;

[0027] 21. Raised structure; 22. Groove. Detailed Implementation

[0028] 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 based on this application are within the protection scope of the present utility model.

[0029] As shown in Figure 1 and Figure 2 The image shows a water-light needle device in the prior art with an adjusting cap and an adjusting rod that are both threaded with multiple turns of thread. The adjusting cap has multiple turns of thread M1 or M2, and the adjusting rod has multiple turns of thread N. The adjusting cap and adjusting rod can rotate back and forth multiple turns. However, when adjusting by rotating back and forth, if the rotation angle exceeds one turn, the operator often becomes confused when reading the scale.

[0030] like Figures 3 to 9 As shown, this utility model provides a water light needle device with adjustable needle tip extension length, including: an adjusting rod 10 and an adjusting cover 20.

[0031] One of the adjusting rod 10 and the adjusting cover 20 is provided with a thread, and the other is provided with a protruding structure that can move within the thread groove of the thread.

[0032] In an optional embodiment, the adjusting rod 10 is provided with threads, and the inner wall of the adjusting cover 20 is provided with a radially inward protruding protrusion structure.

[0033] Optionally, the inner wall of the adjusting cover 20 is provided with threads, and the adjusting rod 10 is provided with a radially outward protruding structure.

[0034] In the technical solution of this utility model, a thread is provided only on one of the adjusting rod and the adjusting cover, and a protruding structure is provided on the other, so that the protruding structure rotates and moves within the thread groove of the thread.

[0035] The following description is exemplarily provided with a thread 11 on the adjusting rod 10 and a radially inwardly protruding protrusion structure 21 on the inner wall of the adjusting cover 20.

[0036] In embodiments of this disclosure, a limiting surface is provided within the threaded groove to restrict further movement of the protruding structure.

[0037] Optionally, the limiting surface includes a first limiting surface and a second limiting surface, wherein the first limiting surface is located at one end of the thread and the second limiting surface is located at the other end of the thread. The first and second limiting surfaces are provided to limit the circumferential rotational position of the protruding structure of the adjusting cover.

[0038] like Figure 4 and Figure 5 As shown, the adjusting rod 10 is provided with a thread 11, and a first limiting surface 13 is provided at one end of the thread, that is, the starting end of the thread (the end away from the water light needle head). The first limiting surface 13 prevents the protruding structure from sliding out in the thread groove 12.

[0039] At the other end of the thread, i.e. the end of the thread (the end near the water light needle tip), a second limiting surface 14 is provided, which can also prevent the protruding structure from sliding out of the thread groove 12.

[0040] The terms "upper," "lower," "one end," and "the other end" used in this disclosure are illustrative descriptions. In this disclosure, the direction in which the water-light needle is inserted is "lower" or "the other end," and vice versa, it is "upper" or "one end."

[0041] Optionally, the vertical distance between the first limiting surface and the second limiting surface in the axial direction is 1 to 2 thread pitches.

[0042] like Figure 6 As shown, the vertical distance between the first limiting surface 13 and the second limiting surface 14 in the axial direction is L, which can be the axial distance from the bottom end of the first limiting surface 13 to the bottom end of the second limiting surface 14.

[0043] Optionally, the first and second limiting surfaces are configured such that the maximum circumferential rotation angle of the protrusion structure within the threaded groove is 360°.

[0044] like Figure 5 and Figure 9 As shown, the protruding structure 21 rotates within the threaded groove 12. The maximum rotation angle of the protruding structure 21 in the circumferential direction of the thread is 360°, meaning it rotates at most one revolution. This avoids the problem mentioned in the prior art, where multiple revolutions are caused by setting multiple threads in both the adjusting rod and the adjusting cover, making it impossible for the operator to identify how many revolutions have been made.

[0045] Optionally, the adjusting cover may have two raised structures, symmetrically arranged on the inner wall of the adjusting cover. Optionally, the number of raised structures may also be three, four, etc., and is not limited here.

[0046] In an optional embodiment, one end of the thread is provided with a slotted structure suitable for the protruding structure to enter the thread groove.

[0047] like Figure 4 As shown, a slot 15 is provided at one end of the thread 11, that is, the end away from the water light needle head.

[0048] Optionally, the number of slots must be at least two.

[0049] In the embodiments of this utility model, the number of slots is consistent with the number of protrusions, that is, each protrusion corresponds to one slot, so that the protrusion enters the thread groove through the slot.

[0050] Optionally, the length of the protrusion in the circumferential direction is 0.5 to 4 mm.

[0051] like Figure 8 As shown, the length W of the protrusion structure 21 in the circumferential direction ranges from 0.5 to 4 mm. The vertical distance between the two limiting surfaces in the threaded groove of the adjusting rod and the number of thread pitches are adjusted according to the length of the protrusion structure in the circumferential direction.

[0052] In embodiments of this disclosure, such as Figure 7 As shown, grooves 22 are provided on both sides of the inner wall surface where the protruding structure 21 is located.

[0053] When the adjusting cover 20 is inserted into the adjusting rod 10, the protruding structure 21 enters the threaded groove from the slot 15 on the adjusting rod 10. The inner diameter of the protruding structure 21 is smaller than the minor diameter of the slot 15, meaning the distance from the inner wall surface of the protruding structure 21 to the central axis is less than the distance from the end face of the slot 15 to the central axis. This ensures an interference fit between the protruding structure 21 and the slot 15 during assembly, guaranteeing that the adjusting cover 20 will not detach from the adjusting rod 10 during use. This disclosure provides grooves 22 on both sides of the inner wall surface where the protruding structure 21 is located, ensuring that the protruding structure 21 has outward deformation space during installation, allowing it to break through the end face of the slot 15 and engage while being pressed down.

[0054] According to one embodiment of the present invention, such as Figure 3 As shown, the scale markings indicating the needle tip extension length are arranged circumferentially on the top of the adjustment cover, and the scale is identified by the scale markings aligned with the negative pressure port; alternatively, the scale markings can be arranged circumferentially on the outer circle of the adjustment cover, and the scale is identified by the scale markings aligned with the negative pressure port.

[0055] Because one of the adjusting rod and the adjusting cover of this utility model is provided with a thread and the other with a raised structure, the raised structure rotates around the thread groove of the thread. Therefore, the exposed needle scale can be accurately identified to adjust the required exposed needle length.

[0056] It should be noted that the above technical solutions can be combined arbitrarily where logically permissible, and all are within the protection scope of this utility model. In this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0057] The various embodiments in this specification are described in a related manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0058] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that variations and combinations of elements may be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A water-light needle device with adjustable needle tip extension length, comprising an adjusting rod and an adjusting cover; Its features are: One of the adjusting rod and the adjusting cover is provided with a thread, and the corresponding other is provided with a protrusion structure that can move within the thread groove of the thread.

2. The water-light needle device according to claim 1, characterized in that: The threaded groove is provided with a limiting surface that restricts further movement of the protruding structure.

3. The water-light needle device according to claim 2, characterized in that: The limiting surface includes a first limiting surface and a second limiting surface, the first limiting surface being located at one end of the thread and the second limiting surface being located at the other end of the thread.

4. The water-light needle device according to claim 3, characterized in that: The first limiting surface and the second limiting surface are configured such that the maximum circumferential rotation angle of the protrusion structure within the threaded groove is 360°.

5. The water-light needle device according to claim 3, characterized in that: The vertical distance between the first limiting surface and the second limiting surface in the axial direction is 1 to 2 thread pitches.

6. The water-light needle device according to claim 3, characterized in that: One end of the thread is provided with a slotted structure suitable for the protrusion to enter the thread groove.

7. The water-light needle device according to claim 6, characterized in that: The number of both the protruding structure and the slotted structure is at least two.

8. The water-light needle device according to claim 1, characterized in that: The length of the protrusion in the circumferential direction is 0.5 to 4 mm.

9. The water-light needle device according to any one of claims 1-8, characterized in that: The adjusting rod is threaded, and the inner wall of the adjusting cover has a radially inwardly protruding structure; or The inner wall of the adjusting cover is provided with threads, and the adjusting rod is provided with a radially outward protruding structure.

10. The water-light needle device according to claim 1, characterized in that: The adjusting rod is threaded, and the inner wall of the adjusting cover is provided with a radially inward protruding protrusion structure. Grooves are provided on both sides of the inner wall surface where the protrusion structure is located.

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