Single-circle adjusting injection needle
By designing a single-turn adjustment injection needle, using the structure of the drive shaft and threaded connection, the precise adjustment of the needle length is solved, and the existing injection needle cannot adapt to the gap in skin thickness and poor adjustment accuracy in different people.
Patent Information
- Application Number
- CN202411830015.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-12
- Publication Date
- 2025-03-11
AI Technical Summary
The length of the existing injection needles is fixed or need to be adjusted by twisting multiple turns, which cannot adapt to the difference between the thickness of the epidermis to the dermis of different people, and the number of twisting turns is not directly judged, resulting in poor adjustment accuracy.
A single-turn adjustment injection needle is designed, including a needle holder assembly, a screw member and a needle sleeve. Through the drive shaft and threaded connection, the rotating screw member drives the needle holder assembly to move, adjust the needle output length, and achieve accurate adjustment of the needle length.
This injection needle can adapt to the thickness difference between epidermis and dermis of different people, improves the accuracy of needle length adjustment, and avoids the trouble of user memory number of twists.
Smart Images
Figure CN119587809A_ABST
Abstract
Description
Technical Field
[0001] Embodiments of the present disclosure relate to the technical field of cosmetic devices, and in particular to a single-turn adjustment injection needle. Background Art
[0002] Injection needles are widely used in the skin beauty industry. Injection needles can deliver drugs into the patient's skin through the needle set at the front end. When the active ingredients penetrate into the dermis, the beauty effect is better. At present, the needle length of the commonly used injection needles is fixed, or it is necessary to turn the needle several times to adjust the extended length to the maximum.
[0003] However, when using the above-mentioned injection needle, the following technical problems often occur: when using an injection needle with a fixed needle length, the needle withdrawal length of the injection needle cannot be adjusted, which makes it difficult to adapt to the thickness difference from the epidermis to the dermis of different people; for an injection needle that needs to be twisted multiple times, the user needs to remember the number of turns during use, but there is no direct basis for judging the number of turns, and it can only rely on the user's memory, resulting in poor accuracy in adjusting the needle length of the injection needle.
[0004] The above information disclosed in this Background section is only for enhancement of understanding of the background of the present disclosure concept and therefore it may contain information that does not form the prior art that is already known in this country to a person of ordinary skill in the art. Summary of the invention
[0005] The content of this disclosure is used to introduce concepts in a brief form, which will be described in detail in the detailed implementation section below. The content of this disclosure is not intended to identify the key features or essential features of the technical solution claimed for protection, nor is it intended to limit the scope of the technical solution claimed for protection.
[0006] Some embodiments of the present disclosure provide a single-turn adjustment injection needle to solve one or more of the technical problems mentioned in the above background technology section.
[0007] Some embodiments of the present disclosure provide a single-turn adjustable injection needle, which includes a needle seat assembly, a screw and a needle sleeve, wherein the needle seat assembly includes a drive shaft, a main body and a needle group, wherein the drive shaft is located at the upper end of the main body, and the needle group is located at the lower end of the main body; an axial thread is provided on the outer side of the drive shaft, and a drive shaft cavity is provided inside the drive shaft, and an injection port connected to the drive shaft cavity is provided on the upper end surface of the drive shaft; a main body cavity is provided inside the main body, wherein the upper end of the main body cavity is connected to the drive shaft cavity, and the lower end is provided with a drug delivery port connected to the needle group; the needle group It comprises at least one needle head; a screw thread is provided on the inner side of the screw member, and a first buckle is provided on the lower end of the screw member; a second buckle matching the first buckle is provided on the upper end of the needle sleeve; in a use state, the needle seat assembly, the screw member and the needle sleeve are assembled along the same axial direction, wherein the needle seat assembly and the screw member are screwed together and connected with the screw thread through the shaft thread, and the screw member and the needle sleeve are engaged and connected with the first buckle and the second buckle through the first buckle; in a use state, rotating the screw member will drive the needle seat assembly to move along the driving shaft, wherein, when the needle seat assembly moves to the maximum distance, the screw member rotates less than one circle.
[0008] Optionally, the single-turn adjustable injection needle further comprises an annular sealing ring, which is sleeved on the outside of the main body part during operation, and the needle seat assembly is installed inside the needle sleeve, wherein the outer side surface of the main body part is provided with a circle of grooves matching the annular sealing ring.
[0009] Optionally, the single-turn adjustable injection needle further comprises a soft rubber sealing head, the end of the soft rubber sealing head is provided with a groove matching the lower port of the needle sleeve, the soft rubber sealing head is a structure with both ends open, and when in use, the lower port of the needle sleeve is embedded in the groove of the end.
[0010] Optionally, a dimension line of a preset length is engraved on the outer circumferential surface of the screwing part, wherein the preset length is smaller than the circumference of the outer circumferential surface, and scale values corresponding to the dimension line are also engraved on the outer circumferential surface.
[0011] Optionally, an indicator structure is provided on the first outer wall of the needle sleeve. The indicator structure is a strip-shaped protrusion perpendicular to the first outer wall, and the end thereof close to the screw member is a pointed end. When in use, the pointed end of the indicator structure points to a scale value, and the scale value indicates the axial downward movement distance of the needle seat at this time.
[0012] Optionally, when the single-turn adjustment injection needle is in use, the screw member and the needle sleeve are engaged with the first buckle and the second buckle, the needle seat assembly moves inside the screw member and the needle sleeve, and a partition is provided inside the needle sleeve; a limit column is provided on the partition, and the limit column is hollow and has a limit hole at the bottom; when the upper end surface of the needle seat assembly contacts the lower end surface of the screw member, the needle seat assembly stops axially moving upward, and the indication structure points to the minimum scale value; when the lower end surface of the needle seat assembly contacts the partition, the needle seat assembly stops axially moving downward, and the indication structure points to the maximum scale value; the minimum scale value does not coincide with the maximum scale value, and a screwing indication mark is also provided between the minimum scale value and the maximum scale value, wherein the indication structure cannot point to the screwing indication mark.
[0013] Optionally, the screw indication mark includes a first groove, an arrow-shaped groove and a second groove, wherein an area of the first groove is smaller than an area of the second groove, and the arrow-shaped groove points from the first groove to the second groove.
[0014] Optionally, the outer side surface of the screwing member is provided with a circle of strip-shaped protrusions parallel to the axial direction, wherein the strip-shaped protrusions are located above the scale values and the size markings; and a pair of opposite outer walls of the needle sleeve are provided with long strip-shaped protrusions parallel to the axial direction.
[0015] Optionally, the needle sleeve includes a needle sleeve chamber; the needle sleeve chamber is located below the partition; and a needle sleeve air tube communicating with the needle sleeve chamber is provided on the outer wall of the needle sleeve.
[0016] Optionally, the needle sheath trachea is located below the partition.
[0017] The above-mentioned embodiments of the present disclosure have the following beneficial effects: through a single-turn injection needle of some embodiments of the present disclosure, it is possible to adapt to the thickness difference between the epidermis and the dermis of different people, and improve the accuracy of adjusting the needle length of the injection needle. Specifically, the reasons for the difficulty in adapting to the thickness difference between the epidermis and the dermis of different people and the poor accuracy of adjusting the needle length of the injection needle are: when using an injection needle with a fixed needle length, the needle length of the injection needle cannot be adjusted, which makes it difficult to adapt to the thickness difference between the epidermis and the dermis of different people; for an injection needle that needs to be twisted multiple times, the user needs to remember the number of turns during use, and there is no direct basis for judging the number of turns, and it can only rely on the user's memory, resulting in poor accuracy in adjusting the needle length of the injection needle. Based on this, some embodiments of the single-turn injection needle disclosed herein, the single-turn adjustable injection needle includes a needle seat assembly, a screw and a needle sleeve, wherein the needle seat assembly includes a drive shaft, a main body and a needle group, wherein the drive shaft is located at the upper end of the main body, and the needle group is located at the lower end of the main body; an axial thread is provided on the outer side of the drive shaft, and a drive shaft cavity is provided inside the drive shaft, and an injection port connected to the drive shaft cavity is provided on the upper end surface of the drive shaft; a main body cavity is provided inside the main body, wherein the upper end of the main body cavity is connected to the drive shaft cavity, and the lower end is provided with a drug delivery port connected to the needle group; the needle group includes The needle seat assembly includes at least one needle head; a screw thread is provided on the inner side of the screw member, and a first buckle is provided at the lower end of the screw member; a second buckle matching the first buckle is provided at the upper end of the needle sleeve; in the use state, the needle seat assembly, the screw member and the needle sleeve are assembled along the same axial direction, wherein the needle seat assembly and the screw member are screwed together with the screw thread through the shaft thread, and the screw member and the needle sleeve are engaged with the first buckle and the second buckle; in the use state, rotating the screw member will drive the needle seat assembly to move along the drive shaft, wherein when the needle seat assembly moves to the maximum distance, the screw member rotates less than one circle. Also, because the drive shaft and the screw member are screwed together on the same axis through threads at the upper end of the needle seat assembly, and the lower end of the screw member is buckled on the upper end of the needle sleeve, the needle seat assembly can be driven to move in the axial direction by rotating the screw member, and the needle head's needle exit length can be adjusted at the same time, so as to adapt to the thickness difference from the epidermis to the dermis of different people. Furthermore, because the maximum distance that the needle seat assembly can move is less than the pitch of the shaft thread, the maximum moving distance of the needle seat assembly can be achieved under the premise that the screw member rotates less than one circle, and multiple circles of adjustment are not required, so that the user does not need to remember the number of circles of rotation during use, thereby improving the accuracy of adjusting the needle tip length of the injection needle. Therefore, it can adapt to the thickness difference between the epidermis and the dermis of different people, and improve the accuracy of adjusting the needle tip length of the injection needle. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] The above and other features, advantages and aspects of the embodiments of the present disclosure will become more apparent with reference to the following detailed description in conjunction with the accompanying drawings. Throughout the accompanying drawings, the same or similar reference numerals represent the same or similar elements. It should be understood that the drawings are schematic and that components and elements are not necessarily drawn to scale.
[0019] Figure 1 is a three-dimensional assembly diagram of some embodiments of the single-turn adjustment injection needle according to the present disclosure;
[0020] Figure 2 is a schematic structural diagram of a screwing member for adjusting an injection needle in a single turn according to the present disclosure;
[0021] Figure 3 is a cross-sectional view of some embodiments of a single-turn adjustment injection needle according to the present disclosure;
[0022] Figure 4 is an oblique view of some embodiments of a single-turn adjustment injection needle according to the present disclosure;
[0023] Figure 5 is a schematic structural diagram of a single-turn adjustment injection needle according to the present disclosure in a state where the needle is not removed;
[0024] Figure 6 This is a schematic diagram of the structure of the single-turn adjustment of the injection needle in the maximum needle extension state according to the present disclosure;
[0025] Figure 7 is a schematic structural diagram of a needle cover of a single-turn adjustable injection needle according to the present disclosure;
[0026] Figure 8 is a schematic structural diagram of a needle seat for a single-turn adjustment injection needle according to the present disclosure;
[0027] Fig. 9 is a cross-sectional view of a needle cover of a single-turn adjustment injection needle according to the present disclosure;
[0028] Fig.10 is a cross-sectional view of a needle cover and a needle seat of a single-turn adjustable injection needle according to the present disclosure in an installed state;
[0029] Fig.11 is a cross-sectional view of a needle guard of a single-turn adjustment injection needle according to the present disclosure. DETAILED DESCRIPTION
[0030] Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be construed as being limited to the embodiments set forth herein. On the contrary, these embodiments are provided to provide a more thorough and complete understanding of the present disclosure. It should be understood that the drawings and embodiments of the present disclosure are only for exemplary purposes and are not intended to limit the scope of protection of the present disclosure.
[0031] It should also be noted that, for ease of description, only the parts related to the invention are shown in the drawings. In the absence of conflict, the embodiments and features in the embodiments of the present disclosure can be combined with each other.
[0032] It should be noted that the concepts such as "first" and "second" mentioned in the present disclosure are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.
[0033] It should be noted that the modifications of "one" and "plurality" mentioned in the present disclosure are illustrative rather than restrictive, and those skilled in the art should understand that unless otherwise clearly indicated in the context, it should be understood as "one or more".
[0034] The names of the messages or information exchanged between multiple devices in the embodiments of the present disclosure are only used for illustrative purposes and are not used to limit the scope of these messages or information.
[0035] The present disclosure will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.
[0036] Figure 1 is a three-dimensional assembly diagram of a single-turn adjustment injection needle according to some embodiments of the present disclosure. Figure 1 It includes a screw part 1, a needle seat assembly 2, an annular sealing ring 3, a needle sleeve 4, a soft rubber sealing head 5, a drive shaft 21, a shaft thread 22, a main body 23, a groove 24, a needle group 25, a needle 26, an indication structure 41, a long strip protrusion 42 and a groove 51.
[0037] Figure 2 is a schematic diagram of a screw for adjusting an injection needle by a single turn according to some embodiments of the present disclosure. Figure 2 It includes a strip-shaped raised band 11 , a scale value 12 , a dimension mark 13 , a screw indication mark 14 , a first groove 15 , an arrow-shaped groove 16 , a second groove 17 and a screw thread 18 .
[0038] Figure 3 is a cross-sectional view of a single-turn adjustment injection needle according to some embodiments of the present disclosure. Figure 3It includes an injection port 6 , a screw thread 18 , a first buckle 19 , an axis thread 22 , a needle 26 , a drive shaft cavity 27 , a main body cavity 28 , a drug delivery port 29 , a second buckle 44 and a groove 51 .
[0039] Figure 4 1 is an oblique view of some embodiments of the single-turn adjustment injection needle disclosed herein. Figure 4 It includes an indication structure 41 , a long raised strip 42 , a needle sheath air tube 43 and a needle sheath chamber 45 .
[0040] Figure 5 It is a schematic structural diagram of the single-turn adjustment injection needle in the non-exited state according to the present invention. Figure 5 It includes a strip-shaped raised band 11 , scale values 12 , dimension markings 13 and an indicating structure 41 .
[0041] Figure 6 It is a schematic diagram of the structure of the single-turn adjustment injection needle in the maximum needle extension state according to the present invention. Figure 6 It includes a strip-shaped raised band 11 , scale values 12 , dimension markings 13 and an indicating structure 41 .
[0042] Figure 7 It is a schematic structural diagram of a needle cover of a single-turn adjustable injection needle according to the present invention. Figure 7 It includes a needle cover 201 , a boss 202 , a hole 203 , and a channel groove 204 .
[0043] Figure 8 It is a schematic structural diagram of a needle seat for a single-turn adjustment injection needle according to the present invention. Figure 8 It includes a needle 26 , a needle seat 205 , a central drug delivery port 206 , a raised edge 207 , a wall structure 208 , and a wall-shaped protrusion 209 .
[0044] Fig. 9 is a cross-sectional view of a needle cover of a single-turn adjustment injection needle according to the present disclosure. Fig. 9 It includes an injection port 6 , a shaft thread 22 , a drive shaft cavity 27 , a boss 202 , a hole 203 , and a channel groove 204 .
[0045] Fig.10 It is a cross-sectional view of the needle cover and the needle seat of the single-turn adjustment injection needle according to the present disclosure in the installed state. Fig.10 It includes a main body cavity 28 , a needle cover 201 , a boss 202 , a channel groove 204 , a needle seat 205 , a raised edge 207 , and a wall structure 208 .
[0046] Fig.11 is a cross-sectional view of a needle guard of a single-turn adjustment injection needle according to the present disclosure. Fig.11 It includes an indication structure 41 , a needle sleeve air tube 43 , a second buckle 44 , a partition 46 , a limiting column 47 and a limiting hole 48 .
[0047] In some embodiments, the main structure of the single-turn adjustment injection needle can be composed of a screw 1, a needle seat assembly 2 and a needle sleeve 4. The main structure can be made of thermoplastic plastic material, and the thermoplastic plastic can be polyethylene, polypropylene and polyvinyl chloride. The thermoplastic plastic material can ensure the impermeability, heat resistance and hardness of the medical device. When the main structure is installed, the screw 1 can be rotated horizontally to drive the needle seat assembly 2 to slide up and down along the axial direction. The needle seat assembly 2 can play the role of carrying the needle group 25 to slide up and down, and can also serve as a channel for delivering drugs to the needle group 25. The needle seat assembly 2 can include a drive shaft 21, a main body 23 and a needle group 25. The drive shaft 21 can be located at the upper end of the main body 23, and the needle group 25 can be located at the lower end of the main body 23. The needle group 25 can include at least one needle 26. Among them, the needle 26 can be made of stainless steel. The stainless steel material can include but is not limited to at least one of the following: austenitic stainless steel, ferritic stainless steel, and martensitic stainless steel. The drive shaft 21 may be provided with an axial thread 22 on the outside. The drive shaft 21 may have a drive shaft cavity 27 inside. The drive shaft cavity 27 may have an injection port 6 on the upper end surface of the drive shaft 21. The drive shaft 21 may play a role in connecting the needle seat assembly 2 and the screw member 1. In the use state, the screw member 1 may drive the movement of the needle seat assembly 2 through the drive shaft 21. The main body portion 23 may have a main body cavity 28 inside. The upper end of the main body cavity 28 may be connected to the drive shaft cavity 27. The lower end surface of the main body cavity 28 may have a drug delivery port 29 connected to the needle group 25. The screw member 1 may have a screw thread 18 matching the axial thread 22 on the inside. The screw member 1 may have a first buckle 19 at the lower end. For example, the first buckle 19 may be set at the inner ring of the lower end of the screw member 1. The needle sleeve 4 may have a second buckle 44 at the upper end. For example, the second buckle 44 can be arranged on the outer ring of the upper end of the needle sleeve 4. The needle seat assembly 2 and the screw member 1 can be screwed together through the shaft thread 22 and the screw thread 18. Both the shaft thread 22 and the screw thread 18 can be complete thread structures, so that the connection between the screw member 1 and the needle seat assembly 2 is more stable. The screw member 1 can be connected to the needle sleeve 4 through the first buckle 19 and the second buckle 44. In the use state, the first buckle 19 and the second buckle 44 can fix the screw member 1 and the needle sleeve 4 in the axial direction without relative displacement, and can also make the screw member 1 and the needle sleeve 4 rotate relative to each other in the radial direction. Through the chimeric connection of the first buckle 19 and the second buckle 44, the assembly of the product can be simpler and faster, and it is not easy to loosen, which can ensure that the product is more stable during use and avoid accidental injuries during use.In the use state, the needle sleeve 4 can cover the needle group 25 and the main body 23 therein, playing a role of limiting. In the use state, the main body 23 of the needle seat assembly 2 can move up and down in the internal space formed after the screw 1 and the needle sleeve 4 are engaged. The movement of the needle seat assembly 2 can be controlled by the screw 1. When the screw 1 is engaged with the needle sleeve 4 and rotates in the horizontal direction, the drive shaft 21 connected to the screw 1 by a thread can be subjected to an axial upward or axial downward force, thereby driving the needle seat assembly 2 to move up and down as a whole, so as to achieve the purpose of controlling the needle length. For example, such as. Figure 5 and Figure 6 As shown, it can be configured that, in a top view, the screwing member 1 is rotated counterclockwise to drive the needle seat assembly 2 to move downward as a whole so that the needle 26 extends downward; the screwing member 1 is rotated clockwise to drive the needle seat assembly 2 to move upward as a whole so that the needle 26 retracts upward. Here, the corresponding relationship between the rotation direction of the screwing member 1 and the movement direction of the needle seat assembly 2 is not limited.
[0048] In some embodiments, the pitch of the shaft thread 22 and the screw thread 18 can be greater than the maximum distance that the needle seat assembly 2 moves downward. For example, the maximum length of the needle 26 can be set to 3mm, and the pitch of the shaft thread 22 and the screw thread 18 can be set to 4mm. In this way, the purpose of the needle 26 extending to the maximum length can be achieved by rotating the screw member 1 less than one turn. Here, there is no restriction on the maximum length of the needle 26 and the preset values of the pitch of the shaft thread 22 and the screw thread 18, as long as the pitch of the thread is greater than the maximum length that the needle 26 can extend. When in use, a syringe that can be accommodated by the drive shaft cavity 27 can be inserted into the drive shaft cavity 27 through the injection port 6 to deliver medicine to the main body cavity 28. The medicine can flow into the needle group 25 through the drug delivery port 29 and then enter the patient's dermis through each needle 26 included in the needle group 25.
[0049] Alternatively, if Figure 1As shown, the single-turn adjustment injection needle may further include an annular sealing ring 3. The annular sealing ring 3 may be made of a soft rubber material, such as silicone or rubber. A circle of grooves 24 may be provided on the side of the main body 23. Here, the number of the grooves 24 and the number of the annular sealing rings are not limited. When in use, the annular sealing ring 3 may be sleeved on the groove 24, so that the needle seat assembly 2 has an interference fit when it is installed in the needle sleeve 4. That is, when in use, the needle seat assembly 2 is not in direct close contact with the needle sleeve 4, but is separated by the annular sealing ring 3. The advantage of providing the annular sealing ring 3 is that it avoids the surface-to-surface contact between the needle seat assembly 2 and the needle sleeve 4. Changing to line-to-surface contact can make it easy to install and disassemble the needle seat assembly 2 and the needle sleeve 4. In addition, the addition of the annular sealing ring 3 makes the interference fit between the needle seat assembly 2 and the needle sleeve 4 prevent the needle seat assembly 2 from easily sliding relative to the needle sleeve 4, which can play a positioning role.
[0050] Alternatively, if Figure 1 and Figure 3 As shown, the above-mentioned single-turn adjustment injection needle may also include a soft rubber sealing head 5. The above-mentioned soft rubber sealing head 5 may be made of soft rubber material, such as silicone or rubber. The above-mentioned soft rubber sealing head 5 may be open at both ends. A soft rubber sealing head end groove 51 may be provided at the upper end of the above-mentioned soft rubber sealing head 5. When in use, the above-mentioned soft rubber sealing head 5 may be embedded in the lower port of the above-mentioned needle sleeve 4 through the soft rubber sealing head end groove 51. The lower end of the above-mentioned soft rubber sealing head 5 is in close contact with the patient's skin, and can produce a conforming deformation with the different contours of different parts of the patient to achieve the purpose of sealing.
[0051] Alternatively, if Figure 1 As shown, a dimension line 13 of a preset length may be engraved on the circumference of the side of the screw 1. A corresponding scale value 12 may be engraved above the dimension line 13. The preset length of the scale value 12 is consistent with the preset length of the dimension line 13. The advantage of engraving the dimension line 13 and the scale value 12 on the circumference of the side of the screw 1 is that the dimension line 13 and the scale value 12 can be observed while rotating the screw 1, which is not only convenient for reading, but also allows for more accurate and convenient scale adjustment. And during the use of the product, it is also convenient to view the scale accurately. It should be noted that the scale value 12 can also be engraved in other directions of the dimension line 13, which is not particularly limited here, as long as the corresponding relationship between the dimension line 13 and the scale value 12 can be expressed. The preset length of the dimension line 13 can be less than the circumference of the side circumference of the screw 1. When in use, the size marking line 13 and the scale value 12 can indicate the length of the needle 26 extending therefrom.
[0052] Alternatively, if Figure 1 and Figure 4 As shown, an indication structure 41 may be provided on the outer wall of the needle sleeve 4. The indication structure 41 may be a strip-shaped protrusion perpendicular to the outer wall of the needle sleeve 4. The end of the indication structure 41 used for indication may be the end close to the screw member 1. The end of the indication structure 41 used for indication may be set as a tip. When in use, the indication structure 41 may point to the dimension mark 13 to indicate the length of the needle 26 extending out. Here, the position and shape of the indication structure are not limited, as long as the length of the needle 26 extending out can be accurately indicated.
[0053] Alternatively, if Figure 3 and Fig.11 As shown, a partition 46 may be provided inside the needle sleeve 4. A limiting column 47 may be provided on the partition 46. The limiting column 47 may be a hollow structure. A limiting hole 48 may be provided at the bottom end of the limiting column 47. The partition 46 may divide the inside of the needle sleeve 4 into two spaces. The number of the limiting columns 47 may be the same as the number of the needles 26 included in the needle group 25. The needles 26 may pass through the limiting columns 47 and extend from the limiting holes 48. The limiting holes 48 may ensure the stability of the needles 26 when in use, and may improve the injection effect. The upper end surface of the partition 46 and the lower end surface of the screw member 1 may play a role in limiting the sliding of the needle seat assembly 2. For example, when the lower end surface of the needle seat assembly 2 contacts the upper end surface of the partition 46 and the needle seat assembly 2 cannot continue to slide downward, the indication structure 41 can point to the maximum value of the scale value 12, indicating that the sliding length of the needle seat assembly 2 has reached the maximum value; when the upper end surface of the needle seat assembly 2 contacts the lower end surface of the screw 1 and the needle seat assembly 2 cannot continue to slide upward, the indication structure 41 can point to the minimum value of the scale value 12, indicating that the needle seat assembly 2 is in the initial position. It should be noted that the restriction on the sliding of the needle seat assembly 2 is not limited to the method of using the end surfaces of the above components to contact each other, as long as it can play a limiting effect. Because the preset length of the scale value 12 is less than the circumference of the outer circumference of the screw 1, the maximum and minimum values of the scale value 12 do not overlap, that is, the indication structure 41 cannot completely point to the outer circumference of the screw 1.
[0054] Alternatively, if Figure 2As shown, a screwing indication mark 14 may be provided on the outer circumferential surface of the screwing member 1, where the indication structure 41 cannot point to. The screwing indication mark may indicate the relationship between the rotation direction of the screwing member 1 and the change trend of the extension length of the needle 26. The screwing indication mark 14 may be composed of a first groove 15, a second groove 17 and an arrow-shaped groove 16, wherein the first groove 15 and the second groove 17 may be circular. The arrow-shaped groove 16 may be located between the first groove 15 and the second groove 17. The area of the first groove 15 may be smaller than that of the second groove 17. The smaller area of the first groove 15 may indicate that when the screwing member 1 rotates in the direction where the first groove 15 is located, the extension length of the needle 26 decreases. The larger area of the second groove 17 may indicate that when the screwing member 1 rotates in the direction where the second groove 17 is located, the extension length of the needle 26 increases. The arrow-shaped groove 16 may point from the first groove 15 to the second groove 17. When in use, rotating the screw member 1 in the direction indicated by the arrow-shaped groove 16 can increase or decrease the extension length of the needle 26. Figure 5 and Figure 6 As shown, the rotation of the screw member 1 in the direction indicated by the arrow-shaped groove 16 can drive the needle seat assembly 2 to move downward as a whole so that the needle 26 extends downward; the screw member 1 in the opposite direction of the direction indicated by the arrow-shaped groove 16 drives the needle seat assembly 2 to move upward as a whole so that the needle 26 retracts upward. Here, the position, form and components of the screw indicator 14 are not limited, as long as the relationship between the rotation direction of the screw member 1 and the change trend of the extension length of the needle 26 can be indicated.
[0055] Alternatively, if Figure 1 and Figure 4As shown, a strip-shaped raised band 11 parallel to the axial direction of the driving shaft 21 may be provided on the side circumference of the screw 1. The strip-shaped raised band 11 may play an anti-slip role. The strip-shaped raised band 11 may cover the side circumference of the screw 1. The strip-shaped raised band 11 may be located above the size marking line 13 and the scale value 12. When in use, the screw 1 will be held by hand and rotated relative to the needle sleeve 4 around the axial direction, so the hand will generate radial force on the screw 1. The axial strip-shaped raised band 11 will increase the friction between the hand and the screw 1 to achieve the purpose of anti-slip. The outer wall of the needle sleeve 4 may be provided with a long strip-shaped raised band 42 parallel to the axial direction of the driving shaft 21. The long strip-shaped raised band 42 may be provided on a pair of opposite outer walls of the needle sleeve 4. When in use, the needle sleeve 4 is held by hand and rotated relative to the screw member 1 around the axial direction, so the hand generates radial force on the needle sleeve 4. The axial long strip protrusion 42 increases the friction between the hand and the needle sleeve 4 to achieve the purpose of anti-slip.
[0056] Alternatively, if Figure 4 As shown, a needle sleeve air tube 43 connected to the needle sleeve chamber 45 may be provided on the outer wall of the needle sleeve 4. The needle sleeve air tube 43 may be perpendicular to the outer wall of the needle sleeve 4. The needle sleeve air tube 43 may be one. When in use, the patient's skin can enclose the needle sleeve chamber 45 into a semi-enclosed space. The semi-enclosed space can be completely closed by closing the needle sleeve air tube 43. A hose can be connected to the mouth of the needle sleeve air tube 43 to connect to a vacuum pump. Starting the vacuum pump can form a negative pressure environment in the completely enclosed space. The patient's skin will bulge into the needle sleeve chamber 45, and each needle 26 included in the needle group 25 can be completely immersed in the patient's skin, thereby achieving the purpose of delivering the drug to the patient's dermis.
[0057] Alternatively, if Fig.11 As shown, the needle sheath air tube 43 may be located below the partition 46. The advantage of such a configuration is that the needle sheath air tube 43 may be directly connected to the needle sheath chamber 45, which may simplify the structure.
[0058] In the cosmetic injection under the multi-needle state, in order to ensure that all needles can discharge medicine uniformly at the same time, the prior art generally adopts the method of connecting the rear ends of all needles to the same chamber. When the medicine fills the above-mentioned chamber, the medicine is continuously delivered to the above-mentioned chamber. The medicine in the chamber will be pressurized to flow toward each needle, so as to achieve the purpose of uniformly discharging medicine from multiple needles at the same time. However, the above-mentioned method will cause the problem of drug waste. Each time an injection is made, a lot of medicine will flow into the above-mentioned chamber from a total drug delivery port, covering each hole connected to the needle, which is a point-to-surface delivery method. And these amounts of medicine are often greater than the amount of medicine required for treatment. After the injection is completed, most of the medicine will remain in the chamber, resulting in drug waste. The present disclosure provides the above-mentioned main body cavity arranged in the above-mentioned main body part, and the above-mentioned main body cavity is a space similar to a pipeline generated by the height difference between the above-mentioned raised edge and the above-mentioned wall-shaped protrusion on the above-mentioned needle seat and the above-mentioned channel groove after being engaged with the above-mentioned channel groove on the above-mentioned needle cover. The above-mentioned pipe-like space can be connected to each drug delivery port, thereby ensuring that after the drug is delivered from the above-mentioned hole, it can be directly delivered point-to-point to each drug delivery port, reducing the range of drug flow, improving the drug delivery efficiency, and thus achieving the effect of reducing drug waste in a multi-needle state.
[0059] Alternatively, if Figure 1 , 3 as well as Figure 7-10As shown, the main body 23 may include a needle seat 205 and a needle cover 201. The needle seat 205 and the needle cover 201 may be fitted together, and the main body cavity 28 may be provided inside the fitting portion. Both the needle seat 205 and the needle cover 201 may be plate-like structures. The needle cover 201 may be provided at the lower end of the drive shaft 21, and may be integrated with the drive shaft 21. The needle group 25 may be provided on one side of the needle seat 205, and the drug delivery port 29 connected to the needle group 25 may be provided on the other side, and one drug delivery port 29 may be connected to one of the needles 26 contained in the needle group 25. The drug delivery port 29 may be used to deliver drugs to the needle 26. At least one central drug delivery port 206 may be provided in the center of the needle seat 205. When there are more than one drug delivery port 29, a raised ridge 207 may be provided between each drug delivery port and the central drug delivery port 206. The width of the raised ridge 207 may be consistent with the width of the drug delivery port 29. A wall-shaped protrusion 209 may be provided around each drug delivery port 29. The wall-shaped protrusion 209 may be a protrusion surrounding the drug delivery port 29, surrounding the drug delivery port 29 in the center of the wall-shaped protrusion 209. The wall-shaped protrusion 209 may be connected to the raised ridge 207, and the heights of the wall-shaped protrusion 209 and the raised ridge 207 may be equal. A hole 203 may be provided in the center of the needle cover 201. The hole 203 may be connected to the drive shaft cavity 27. The hole 203 may be used to deliver drugs into the main body cavity 28. The number of the hole 203 may be one. A wall structure 208 may be provided at the upper end of the needle seat 205. The wall structure 208 may be a protrusion along the outline of the needle seat 205. The wall structure 208 may be perpendicular to the upper end surface of the needle seat 205. The lower end of the needle cover 201 may be provided with a boss 202, and a channel groove 204 may be provided inside the boss 202. In the use state, the wall structure 208 may wrap the boss 202 inside. The depth of the channel groove 204 may be equal to the height of the boss 202. The depth of the channel groove 204 may be greater than the height of the wall-shaped protrusion 209 and the height of the protruding ridge 207. In use, the boss 202 may be embedded in the space surrounded by the wall structure 208. The wall-shaped protrusion 209 and the protruding ridge 207 may both be embedded in the channel groove 204, and the side surfaces of the wall-shaped protrusion 209 and the side surfaces of the protruding ridge 207 may both be in close contact with the side surfaces of the channel groove 204. Since the depth of the channel groove 204 is greater than the height of the wall-shaped protrusion 209 and the height of the protruding ridge 207, the top of the wall-shaped protrusion 209 and the top of the protruding ridge 207 do not contact the bottom of the channel groove 204, forming the main body cavity 28 similar to a pipe.The main body cavity 28 can deliver the drug from the hole 203 to each drug delivery port point-to-point.
[0060] The above optional embodiment, as an inventive point of the embodiment of the present disclosure, solves the technical problem of "drug waste in a multi-needle state". The reasons for drug waste in a multi-needle state are as follows: During the multi-needle injection process, the rear ends of all needles are connected to the same chamber through drug delivery ports. The drug will be diverted in the chamber to ensure that the drug can be output from each needle at the same time. To ensure that the drug can be output from each needle at the same time, it is necessary for the drug to be output from each drug delivery port dispersed on the bottom surface of the chamber at the same time. To achieve the purpose of the drug being output from each drug delivery port dispersed on the bottom surface of the chamber at the same time, a large amount of drug needs to be filled into the chamber to cover each drug delivery port in the chamber. The amount of these drugs is often more than the amount required for treatment. After the injection is completed, most of the drugs will remain in the chamber, resulting in drug waste. If the above factors are solved, the effect of reducing drug waste in a multi-needle state can be achieved. In order to achieve the above effect, the present disclosure provides the above main body cavity disposed in the above main body part, and the above main body cavity is a pipe-like space generated by the height difference between the above raised edge and the above wall-shaped protrusion on the above needle seat and the above channel groove on the above needle cover after they are engaged. The above pipe-like space can be connected to each drug delivery port, thereby ensuring that after the drug is delivered from the above hole, it can be directly delivered point-to-point to each drug delivery port, reducing the range of drug flow, improving drug delivery efficiency, and thus achieving the effect of reducing drug waste in a multi-needle state.
[0061] In the cosmetic needle injection under the multi-needle state, in order to be able to adjust the length of the needle, the needle is generally set to be longer. Since the needle is thin and long, it may bend when it encounters the resistance of the skin, so that the insertion angle changes, which leads to poor injection effect. In order to overcome this difficulty, the prior art generally adopts a structure that sets the cosmetic needle to have an unadjustable needle length to shorten the length of the needle. However, the prior art also has the problem that the insertion depth of the needle cannot flexibly adapt to the thickness of the dermis layer of different people. Therefore, the embodiment of the present disclosure provides the above-mentioned limit column for limiting and supporting the needle, and the above-mentioned limit hole is also provided on the above-mentioned limit column. The above-mentioned limit hole can be used to constrain the needle exit angle of the above-mentioned needle. Thereby, the problem that the needle may bend when it encounters the resistance of the skin, so that the insertion angle changes, is solved, thereby improving the injection effect.
[0062] Alternatively, if Figure 1 and Fig.11As shown, a limiting column 47 may be provided on the partition 46. The limiting column 47 may be a hollow structure. A limiting hole 48 may be provided at the bottom end of the limiting column 47. The limiting column 47 may be set to a conical shape. The purpose of setting it to a conical shape is to better limit the needle 26. The needle 26 enters the interior of the limiting column 47 from the end of the limiting hole 48 with a larger area. When the extension angle of the needle 26 changes, due to the conical setting, the needle 26 can be constrained by the inner wall of the limiting column 47 and gradually move toward the center. The area of the upper end of the limiting hole 48 may be larger than the area of the bottom end of the limiting hole 48. The purpose of such a setting is that when the extension angle of the needle 26 changes, it can be ensured that the needle 26 can enter the interior of the limiting column 47 from the upper end of the limiting column 47 to a greater extent. The upper end of the limiting column 47 may be connected to the partition 46. The bottom end of the above-mentioned limiting column 47 may be provided with the above-mentioned limiting hole 48. The upper end of the above-mentioned limiting column 47 may be connected to the above-mentioned partition 46 along the upper end contour of the above-mentioned limiting column 47. The purpose of such a setting is that the above-mentioned needle 26 needs to enter the interior of the above-mentioned limiting column 47 from the upper end of the above-mentioned limiting column 47, so the upper end surface of the above-mentioned limiting column 47 cannot be completely connected with the above-mentioned partition 46 to form a sealing structure. The above-mentioned limiting hole 48 may be set at the center of the end surface of the bottom end of the above-mentioned limiting column 47. The above-mentioned limiting hole 48 may be a cylindrical hole. Because the above-mentioned needles 26 are all cylindrical structures, the above-mentioned limiting hole 48 needs to be able to accommodate the passage of the above-mentioned needles 26, so the above-mentioned limiting hole 48 may be cylindrical. As long as it can accommodate the passage of the above-mentioned needle 26 and play a role in limiting the needle direction of the above-mentioned needle 26, the above-mentioned limiting hole 48 may also be other forms, which are not limited here. The inner wall of the above-mentioned limiting hole 48 may be smooth to better allow the above-mentioned needle 26 to pass. The diameter of the above-mentioned limiting hole 48 can be the same as the outer diameter of the above-mentioned needle 26 included in the above-mentioned needle group 25. The axis of the above-mentioned limiting hole 48 can be consistent with the axis direction of the above-mentioned drive shaft 21, so that the needle exit direction of the above-mentioned needle 26 can be consistent with the axial direction of the above-mentioned drive shaft 21. The advantage of the needle exit direction of the above-mentioned needle 26 being consistent with the axial direction of the above-mentioned drive shaft 21 is that the direction in which each needle is extended is consistent, ensuring that the insertion angle of each needle when entering the skin is consistent, thereby improving the injection effect. The above-mentioned limiting column 47 can be arranged on the same axial direction as the above-mentioned needle 26. In this way, the above-mentioned needle 26 and the above-mentioned limiting column 47 can correspond one to one. When in use, the lower end of the above-mentioned limiting column 47 is in close contact with the patient's skin, and the above-mentioned needle 26 can extend and retract from the above-mentioned limiting hole 48, and is in close contact with the inner wall of the above-mentioned limiting hole 48.
[0063] The above optional embodiment, as an inventive point of the embodiment of the present disclosure, solves the technical problem of "poor needle insertion effect during injection". The reasons for the poor needle insertion effect during injection are as follows: First, in order to facilitate the adjustment of the needle length, the beauty needle is set with a longer needle. When the needle enters the patient's skin, it may bend due to the resistance of the skin. Second, the longer needle will also make it difficult to keep the insertion angle of each needle the same in the multi-needle injection state. If the above factors are solved, the needle insertion effect can be improved during the injection process. In order to achieve the above effect, the present disclosure provides the above partition, the above limit column and the above limit hole arranged in the above needle sleeve. The above partition is provided with the same number of the above limit columns as the needles. The above limit column is also a hollow structure. The needle can be inserted into the above limit column and extend from the above limit hole. In this way, it can be ensured that when the needle is subjected to the resistance of the skin, it is supported by the above limit column, avoiding the bending caused by external force when the needle is too long. The directions of each of the above-mentioned limiting holes are consistent, so the above-mentioned limiting holes can also limit the needle exit angle of the needle, thereby improving the needle insertion effect during the injection process to achieve a better injection effect.
[0064] The above-mentioned embodiments of the present disclosure have the following beneficial effects: through a single-turn injection needle of some embodiments of the present disclosure, it is possible to adapt to the thickness difference between the epidermis and the dermis of different people, and improve the accuracy of adjusting the needle length of the injection needle. Specifically, the reasons for the difficulty in adapting to the thickness difference between the epidermis and the dermis of different people and the poor accuracy of adjusting the needle length of the injection needle are: when using an injection needle with a fixed needle length, the needle length of the injection needle cannot be adjusted, which makes it difficult to adapt to the thickness difference between the epidermis and the dermis of different people; for an injection needle that needs to be twisted multiple times, the user needs to remember the number of turns during use, and there is no direct basis for judging the number of turns, and it can only rely on the user's memory, resulting in poor accuracy in adjusting the needle length of the injection needle. Based on this, some embodiments of the single-turn injection needle disclosed herein, the single-turn adjustable injection needle includes a needle seat assembly, a screw and a needle sleeve, wherein the needle seat assembly includes a drive shaft, a main body and a needle group, wherein the drive shaft is located at the upper end of the main body, and the needle group is located at the lower end of the main body; an axial thread is provided on the outer side of the drive shaft, and a drive shaft cavity is provided inside the drive shaft, and an injection port connected to the drive shaft cavity is provided on the upper end surface of the drive shaft; a main body cavity is provided inside the main body, wherein the upper end of the main body cavity is connected to the drive shaft cavity, and the lower end is provided with a drug delivery port connected to the needle group; the needle group includes The needle seat assembly includes at least one needle head; a screw thread is provided on the inner side of the screw member, and a first buckle is provided at the lower end of the screw member; a second buckle matching the first buckle is provided at the upper end of the needle sleeve; in the use state, the needle seat assembly, the screw member and the needle sleeve are assembled along the same axial direction, wherein the needle seat assembly and the screw member are screwed together with the screw thread through the shaft thread, and the screw member and the needle sleeve are engaged with the first buckle and the second buckle; in the use state, rotating the screw member will drive the needle seat assembly to move along the drive shaft, wherein when the needle seat assembly moves to the maximum distance, the screw member rotates less than one circle. Also, because the drive shaft and the screw member are screwed together on the same axis through threads at the upper end of the needle seat assembly, and the lower end of the screw member is buckled on the upper end of the needle sleeve, the needle seat assembly can be driven to move in the axial direction by rotating the screw member, and the needle head's needle exit length can be adjusted at the same time, so as to adapt to the thickness difference from the epidermis to the dermis of different people. Furthermore, because the maximum distance that the needle seat assembly can move is less than the pitch of the shaft thread, the maximum moving distance of the needle seat assembly can be achieved under the premise that the screw member rotates less than one circle, and multiple circles of adjustment are not required, so that the user does not need to remember the number of circles of rotation during use, thereby improving the accuracy of adjusting the needle tip length of the injection needle. Therefore, it can adapt to the thickness difference between the epidermis and the dermis of different people, and improve the accuracy of adjusting the needle tip length of the injection needle.
[0065] The above descriptions are only some preferred embodiments of the present disclosure and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the embodiments of the present disclosure is not limited to the technical solutions formed by a specific combination of the above-mentioned technical features, but should also cover other technical solutions formed by any combination of the above-mentioned technical features or their equivalent features without departing from the above-mentioned inventive concept. For example, the above-mentioned features are replaced with the technical features with similar functions disclosed in the embodiments of the present disclosure (but not limited to) and the technical solutions formed.
Claims
1. A single-turn adjustment injection needle, characterized in that: The single-turn adjustment injection needle comprises a needle seat assembly, a screw and a needle sleeve, wherein: The needle hub assembly comprises a drive shaft, a main body portion and a needle group, wherein the drive shaft is located at the upper end of the main body portion and the needle group is located at the lower end of the main body portion; The outer side of the drive shaft is provided with a shaft thread, and the interior of the drive shaft is provided with a drive shaft cavity, and the upper end surface of the drive shaft is provided with an injection port connected to the drive shaft cavity; A main body cavity is provided inside the main body part, wherein the upper end of the main body cavity is connected to the drive shaft cavity, and the lower end is provided with a drug delivery port connected to the needle group; The needle set includes at least one needle; The inner side of the screwing member is provided with a screw thread, and the lower end of the screwing member is provided with a first buckle; The upper end of the needle sleeve is provided with a second buckle matching the first buckle; In the use state, the needle seat assembly, the screwing member and the needle sleeve are assembled along the same axial direction, wherein the needle seat assembly and the screwing member are screwed together by the shaft thread and the screwing thread, and the screwing member and the needle sleeve are engaged and connected by the first buckle and the second buckle; In the use state, rotating the screw member will drive the needle seat assembly to move along the axial direction, wherein when the needle seat assembly moves to the maximum distance, the screw member rotates less than one circle.
2. The single-turn adjustment injection needle according to claim 1, characterized in that: The single-turn adjustable injection needle also includes an annular sealing ring. When in operation, the annular sealing ring is sleeved on the outside of the main body part, and the main body part is installed inside the needle sleeve, wherein the outer side surface of the main body part is provided with a circle of grooves matching the annular sealing ring.
3. The single-turn adjustment injection needle according to claim 1, characterized in that: The single-turn adjustable injection needle also includes a soft rubber sealing head, the end of which is provided with a groove matching the lower port of the needle sleeve. The soft rubber sealing head is a structure with two ends open. When in use, the lower port of the needle sleeve is embedded in the groove at the end.
4. The single-turn adjustment injection needle according to claim 1, characterized in that: The outer circumferential surface of the screwing part is engraved with a dimension mark of a preset length, wherein the preset length is smaller than the circumference of the outer circumferential surface, and the outer circumferential surface is also engraved with a scale value corresponding to the dimension mark.
5. The single-turn adjustment injection needle according to claim 1, characterized in that: An indicator structure is provided on the outer wall of the needle sleeve. The indicator structure is a strip-shaped protrusion perpendicular to the outer wall, and the end of the indicator structure close to the screw member is a pointed end. When in use, the pointed end of the indicator structure points to the scale value, and the scale value indicates the axial downward movement distance of the needle seat at this time.
6. The single-turn adjustment injection needle according to claim 1, characterized in that: When the single-turn adjustment injection needle is in use, the screwing member and the needle sleeve are connected by the first buckle and the second buckle, the needle seat assembly moves inside the screwing member and the needle sleeve, and a partition is provided inside the needle sleeve; The partition is provided with a limiting column, and the bottom end of the limiting column is provided with a limiting hole; When the upper end surface of the needle seat assembly contacts the lower end surface of the screwing member, the needle seat assembly stops moving axially upward, and the indicating structure points to the minimum scale value; When the lower end surface of the needle seat assembly contacts the partition, the needle seat assembly stops moving axially downward, and the indicating structure points to the maximum scale value; The minimum scale value does not overlap with the maximum scale value, and a screwing indication mark is provided between the minimum scale value and the maximum scale value, wherein the indication structure cannot point to the screwing indication mark.
7. The single-turn adjustment injection needle according to claim 6, characterized in that: The screwing indication mark includes a first groove, an arrow-shaped groove, and a second groove, wherein an area of the first groove is smaller than an area of the second groove, and the arrow-shaped groove points from the first groove to the second groove.
8. The single-turn adjustment injection needle according to claim 1, characterized in that: The outer side surface of the screwing part is provided with a circle of strip-shaped protrusions parallel to the axial direction, wherein the strip-shaped protrusions are located above the scale value and the size marking line; A pair of opposite outer walls of the needle sleeve are provided with long strip-shaped raised belts parallel to the axial direction.
9. The single-turn adjustment injection needle according to claim 6, characterized in that: The interior of the needle sleeve includes a needle sleeve chamber; The needle sleeve chamber is located below the partition; A needle sleeve air tube communicating with the needle sleeve chamber is arranged on the outer wall of the needle sleeve.
10. The single-turn adjustment injection needle according to claim 9, characterized in that: The needle sleeve trachea is located below the partition.