Injector with adjustable needle inserting depth
By incorporating a positioning sleeve and locking mechanism into the syringe, along with graduated lines, precise control of the syringe insertion depth is achieved. This solves the problem of inaccurate insertion depth in traditional syringes, improving the accuracy of drug administration and the safety of experiments.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN INSTITUTE FOR DRUG CONTROL (SHENZHEN TESTING CENTER OF MEDICAL DEVICES)
- Filing Date
- 2025-01-08
- Publication Date
- 2026-04-10
AI Technical Summary
Traditional syringes lack an effective needle depth adjustment mechanism, resulting in inaccurate needle depth control, which may lead to experimental failure or drug leakage, affecting the accuracy and safety of experimental results.
An adjustable needle depth syringe was designed. By setting a positioning sleeve and locking element on the needle tip, combined with the scale lines on the syringe barrel and needle tip, the needle depth can be precisely adjusted and fixed.
This ensures the precision of needle insertion depth, reduces the skill requirements for operators, minimizes potential harm to experimental subjects, and improves the accuracy of drug administration and the safety of experiments.
Smart Images
Figure CN224099758U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to syringe technical field especially, it relates to a syringe of needle depth adjustable. BACKGROUND
[0002] In the medical research and experimental field, accurate dosing operation is very important. In many experiments that need to control the needle depth for accurate dosing, the control precision of the needle depth of the syringe as a common dosing tool directly affects the experimental results and success rate.
[0003] The traditional syringe has obvious deficiency in the control of the needle depth. Because of lacking effective needle depth adjustment mechanism, the operator can only estimate the needle depth by experience and feeling, which leads to great uncertainty and error. When the needle is too deep, it may cause irreversible damage to the important tissues and organs of the experimental object, even lead to the death of the animal, so as to make the whole experiment fail, waste a lot of time, energy and resources. When the needle is too shallow, the drug solution is easy to leak, the dosing volume is not accurate, which cannot meet the accurate requirement set by the experiment, and further affect the accuracy and reliability of the experimental data, so that the experimental results lose scientificity and effectiveness. CONTENT OF THE UTILITY MODEL
[0004] The utility model aims at providing a syringe with adjustable needle depth to solve the technical problem that the syringe in the prior art cannot effectively adjust the needle depth, thereby affecting the experimental effect.
[0005] According to the above idea, the utility model adopts the technical scheme of:
[0006] A syringe with adjustable needle depth comprises:
[0007] A main body structure comprises a needle cylinder, a plunger and a needle head. The needle cylinder forms a piston cavity inside. The outer surface of the needle cylinder is provided with a first scale line. The plunger is inserted into the piston cavity and is in sliding connection with the piston cavity. The needle head is connected with the needle cylinder and is in communication with the liquid outlet end of the piston cavity. The needle head is provided with a second scale line.
[0008] An adjustment assembly comprises a positioning sleeve and a locking piece. The positioning sleeve is sleeved on the needle head and can move along the axial direction of the needle head, so as to adjust the length of the needle head exposed from the positioning sleeve. The locking piece is used for locking the positioning sleeve, so as to limit the movement of the positioning sleeve relative to the needle head.
[0009] Preferably, the needle cylinder comprises an integrally formed main body segment and an adapter segment. The needle head is connected with the adapter segment. The outer diameter of the adapter segment is smaller than the inner diameter of the positioning sleeve. Part of the positioning sleeve is sleeved on the adapter segment.
[0010] Preferably, a positioning hole is formed on the side wall of the positioning sleeve near the adapter segment, the locking member can be arranged in the positioning hole and is movable in the direction close to or away from the adapter segment, and the locking member can abut against the adapter segment when the positioning sleeve moves to the preset position.
[0011] Preferably, the locking member is a locking bolt which is threadedly connected with the positioning hole.
[0012] Preferably, the outer surface of the adapter segment is provided with an anti-skid pattern.
[0013] Preferably, the length of the positioning sleeve is greater than or equal to the length of the needle head and less than or equal to the sum of the lengths of the needle head and the adapter segment.
[0014] Preferably, the end of the positioning sleeve near the tip of the needle head is provided with an arc-shaped chamfer.
[0015] Preferably, the radius of the positioning sleeve gradually decreases from the tail end to the tip of the needle head.
[0016] Preferably, the needle head and the needle cylinder are detachably connected.
[0017] Preferably, the tip of the needle head is of a bevel type.
[0018] The present application has the following advantages:
[0019] The injection device with adjustable needle insertion depth provided by the present application can help the operator accurately determine the injection amount of the medicament. The plunger is slid forward and backward in the piston cavity to realize the operation of extracting the liquid medicine into the needle cylinder and pushing the liquid medicine in the needle cylinder from the liquid outlet end to the needle head. The second scale line on the needle head cooperates with the positioning sleeve, the operator can accurately adjust the position of the positioning sleeve according to the actual required needle insertion depth, refer to the second scale line on the needle head, and accurately adjust the position of the positioning sleeve, so that the length of the needle head exposed is just the length required by the needle insertion depth, and then the locking member is used to fix it.
[0020] When administering, the operator can hold the main body structure, insert the needle into the target site until the end of the positioning sleeve is in contact with the target site, and stop the needle insertion. Due to the limiting effect of the positioning sleeve, the depth of needle insertion can be effectively controlled, and the locked positioning sleeve can stably maintain the preset position and is not disturbed by external force in the operation process, ensuring the accuracy of the depth of needle insertion, reducing the requirement for the proficiency of the operator in the administration process, and reducing the needle insertion error caused by insufficient experience of the operator. The needle can accurately enter according to the preset depth, avoiding damage to important tissues and organs caused by too deep needle insertion, and preventing the situation of drug leakage and inaccurate administration volume caused by too shallow needle insertion. Not only the safety of the experiment is ensured, the potential harm to the experimental object is reduced, but also the accuracy of administration is ensured. BRIEF DESCRIPTION OF DRAWINGS
[0021] Figure 1 is a structure schematic view of the injection syringe with adjustable needle insertion depth provided by the embodiment of the present application;
[0022] Figure 2 is a sectional view of the injection syringe with adjustable needle insertion depth provided by the embodiment of the present application;
[0023] Figure 3 is an exploded structure schematic view of the injection syringe with adjustable needle insertion depth provided by the embodiment of the present application;
[0024] Figure 4 is a structure schematic view of the main body structure provided by the embodiment of the present application;
[0025] Figure 5 is a structure schematic view of the adjusting assembly provided by the embodiment of the present application.
[0026] In the drawings:
[0027] 1, main body structure;11, needle barrel;110, piston cavity;111, main body section;112, adapter section;12, plunger;13, needle;14, first scale line;15, second scale line;
[0028] 2, adjusting assembly;21, positioning sleeve;211, positioning hole;22, locking piece. DETAILED DESCRIPTION
[0029] The embodiments of the present application will be described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.
[0030] In the description of the utility model, unless another definite provision and limitation, the term "link", "connect", "fix" should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through the intermediate medium, can be two elements inside the communication or two element's mutual action relation. For ordinary skilled in the art, the above-mentioned term can be understood in the utility model the concrete meaning of specific situation.
[0031] In the utility model, unless another definite provision and limitation, the first feature is "on" or "under" the second feature can include the first and second features direct contact, also can include the first and second features is not direct contact but is through the contact between them additional features. Moreover, the first feature is "on", "above" and "on" the second feature includes the first feature is directly above and obliquely above the second feature, or just indicates that the first feature horizontal height is higher than the second feature. The first feature is "under", "below" and "under" the second feature includes the first feature is directly below and obliquely below the second feature, or just indicates that the first feature horizontal height is less than the second feature.
[0032] The technical scheme of the utility model is further illustrated below by specific embodiments in conjunction with the drawings.
[0033] Referring to Figures 1 to 5 The injection device with adjustable needle insertion depth provided by the utility model embodiment comprises a main body structure 1 and an adjusting assembly 2. The main body structure 1 comprises a needle cylinder 11, a plunger 12 and a needle head 13. The needle cylinder 11 forms a piston cavity 110 inside. The outer surface of the needle cylinder 11 is provided with a first scale line 14. The plunger 12 is inserted into the piston cavity 110 and is in sliding connection with the piston cavity 110. The needle head 13 is connected with the needle cylinder 11 and is in communication with the liquid outlet end of the piston cavity 110. The needle head 13 is provided with a second scale line 15. The adjusting assembly 2 comprises a positioning sleeve 21 and a locking piece 22. The positioning sleeve 21 is sleeved on the needle head 13 and can move along the axial direction of the needle head 13, so as to adjust the length of the needle head 13 exposed from the positioning sleeve 21. The locking piece 22 is used for locking the positioning sleeve 21, so as to limit the movement of the positioning sleeve 21 relative to the needle head 13.
[0034] The utility model discloses an injection device with adjustable needle insertion depth, which comprises a main body structure 1, a needle cylinder 11, a plunger 12, a needle head 13, a first scale line 14, a second scale line 15, a positioning sleeve 21 and a locking piece 22.
[0035] When administering, the operator can hold the main body structure 1 and insert the needle head 13 into the target site until the end of the positioning sleeve 21 contacts the target site, and then stop the needle insertion. Due to the limiting effect of the positioning sleeve 21, the needle insertion depth can be effectively controlled, and the positioning sleeve 21 after locking can stably maintain the preset position and is not disturbed by external force in the operation process, thereby ensuring the accuracy of the needle insertion depth, reducing the requirement for the operator's proficiency during the administration process, and reducing the needle insertion error caused by the operator's insufficient experience. The needle head 13 can accurately enter according to the preset depth, which not only avoids damage to important tissues and organs caused by too deep needle insertion, but also prevents the leakage of the liquid medicine and the inaccuracy of the administration volume caused by too shallow needle insertion. Not only the safety of the experiment is ensured and the potential harm to the experimental object is reduced, but also the accuracy of the administration is ensured.
[0036] The specific structure of the injection device with adjustable needle insertion depth will be described below.
[0037] The needle cylinder 11 comprises a main body segment 111 and an adapter segment 112 which are integrally formed, the needle head 13 is connected with the adapter segment 112, the outer diameter of the adapter segment 112 is smaller than the inner diameter of the positioning sleeve 21, and part of the positioning sleeve 21 is sleeved on the adapter segment 112, thereby increasing the stability and the guidance of the positioning sleeve 21 during the movement, enabling the positioning sleeve 21 to move along the axial direction of the needle head 13 more stably and accurately, and further improving the accuracy and the precision of the needle insertion depth adjustment.
[0038] Specifically, the length of the positioning sleeve 21 is greater than or equal to the length of the needle head 13, which can fully cover the needle head 13 and avoid the limited control effect on the length of the needle head 13 caused by the too short length of the positioning sleeve 21. Moreover, the length of the positioning sleeve 21 is less than or equal to the sum of the length of the needle head 13 and the length of the adapter segment 112, thereby avoiding the situation that the needle head 13 cannot be exposed due to the too long length of the positioning sleeve 21.
[0039] Specifically, a positioning hole 211 is formed on the side wall of the positioning sleeve 21 close to the adapter segment 112, and the locking member 22 can be arranged in the positioning hole 211 and moved in the direction close to or away from the adapter segment 112. When the positioning sleeve 21 moves to the preset position, the locking member 22 can abut against the adapter segment 112, thereby realizing the locking process of the positioning sleeve 21. The abutting mode increases the reliability of the locking, effectively prevents the accidental movement of the positioning sleeve 21 during the injection process, and ensures the accuracy and stability of the preset needle insertion depth. At the same time, the locking member 22 is in contact with the adapter segment 112, thereby avoiding direct contact with the needle 13, effectively protecting the needle 13, and reducing the damage to the needle 13 caused by the locking operation.
[0040] Referring to Figure 5 In the embodiment, the locking member 22 is a locking bolt, which is threadedly connected with the positioning hole 211. The operator can rotate the locking bolt to realize the locking and unlocking operations, and can fine-tune the tightness of the locking according to the needs, so as to ensure that the positioning sleeve 21 can be firmly fixed in different situations, thereby improving the accuracy and stability of the needle insertion depth control. The threaded connection has good self-locking performance. Once the locking bolt is rotated in place, it can effectively prevent the loosening of the locking bolt due to vibration or external force during the injection process, thereby reliably maintaining the position of the positioning sleeve 21 and reducing the risk of deviation of the needle insertion depth caused by locking failure.
[0041] In other embodiments, the locking member 22 can also be an elastic latch. The inner wall of the positioning hole 211 is provided with corresponding latching grooves on both sides. When the positioning sleeve 21 moves to the preset position, the elastic latch is inserted into the positioning hole 211, and the two ends of the elastic latch are latched into the latching grooves, thereby realizing the locking of the positioning sleeve 21.
[0042] The specific structure of the locking member 22 is not limited here, as long as the locking effect of the positioning sleeve 21 can be realized.
[0043] More specifically, in order to improve the stability of the locking bolt after locking, the outer surface of the adapter segment 112 is provided with anti-slip patterns. When the locking bolt abuts against the adapter segment 112 to realize the locking, the anti-slip patterns can increase the friction between the adapter segment 112 and the locking bolt, thereby effectively preventing the relative sliding between the adapter segment 112 and the locking bolt after the locking of the locking bolt due to the movement of the syringe or the action of other external forces, and improving the stability of the locking bolt after locking.
[0044] Specifically, the anti-slip patterns can be selected from wave-shaped protruding patterns, dot-shaped protruding patterns, or grid patterns, and the like, which will not be described here.
[0045] During the administration process, after the needle 13 is inserted into the target site, the end of the positioning sleeve 21 needs to be in contact with the target site before the needle insertion is stopped to ensure the accuracy of the needle insertion depth. Since the end of the positioning sleeve 21 needs to be in contact with the target site, in order to protect the target site, the end of the positioning sleeve 21 close to the tip of the needle 13 is provided with an arc-shaped chamfer, which can reduce the direct impact and pressure on the target site, reducing the risk of damage to the target site, especially for more fragile or sensitive tissues, which plays a good protective role.
[0046] In addition, a silicone or rubber coating can also be provided on the end of the positioning sleeve 21 to increase the cushioning effect when in contact, reducing the pressure and impact force on the target site.
[0047] Specifically, in the direction from the tail end to the tip of the needle 13, the radius of the positioning sleeve 21 gradually decreases, thereby reducing the contact area of the end of the positioning sleeve 21 with the target site, reducing the risk of damage to the normal tissues around the target site. And the gradually tapered structure can provide a better view, making it easier for the operator to clearly observe the contact between the needle 13 and the target site during the needle insertion process, which helps to more accurately control the needle insertion depth and improve the precision and accuracy of the operation.
[0048] In order to facilitate needle insertion, the tip of the needle 13 is shaped as a bevel. The bevel-shaped tip of the needle 13 can reduce the resistance during needle insertion. Compared with the tips of needles 13 of other shapes, the bevel design is easier to pierce the skin and tissues, making the needle insertion process smoother and reducing the pain and discomfort of the patient or experimental subject. At the same time, the angle of the bevel can guide the needle 13 to enter the target site in a specific direction, reducing the possibility of the needle 13 deviating or bending during the needle insertion process, thereby more accurately controlling the needle insertion depth.
[0049] On the surface of the needle 13, a second scale line 15 is provided along the axial direction. The second scale line 15 is marked from the tip of the needle 13 in units of 1 millimeter until the connection between the needle 13 and the needle cylinder 11. The scale markings are marked in a conspicuous color such as red, and the scale numbers are clear and raised to facilitate accurate reading by the operator. In addition, in order to further improve the readability of the scale, at every 5 millimeter scale, the length and width of the markings are appropriately increased to form more obvious large scale markings.
[0050] In addition, the needle 13 is detachably connected with the needle cylinder 11. The separate replacement of the needle 13 is facilitated. During use, if the needle 13 is damaged, bent or contaminated, the new needle 13 can be replaced in time without replacing the whole syringe, thereby saving the cost and improving the utilization of resources. Different experiments or treatments can require different specifications, lengths or thicknesses of the needle 13. The detachable design makes it possible to flexibly select and replace the appropriate needle 13 according to the specific requirements, widens the application range of the syringe and meets the diversified use scenarios.
[0051] The front end of the plunger 12 is cylindrical and tightly fits the piston cavity 110 of the needle cylinder 11, so that the good sealing property is ensured. The rear end of the plunger 12 is provided with a wide circular push plate, and the surface of the push plate is provided with anti-skid texture, so as to increase the friction force when the push plate is pushed by fingers and facilitate the operation.
[0052] The cylindrical part of the plunger 12 has moderate length and can smoothly slide in the piston cavity 110, and the surface of the plunger 12 is marked with an arrow indicating the direction, so as to prompt the correct pushing direction of the operator.
[0053] The cylindrical part of the plunger 12 is also provided with a ring-shaped protrusion near the front end, and when the plunger 12 is pushed to the bottom of the needle cylinder 11, the ring-shaped protrusion is in contact with the bottom of the needle cylinder 11, so as to play a buffering role and prevent the damage of components caused by excessive force.
[0054] The above embodiments only illustrate the basic principles and characteristics of the present application, and the present application is not limited by the above embodiments. Without departing from the spirit and scope of the present application, the present application has various changes and changes, and these changes and changes all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.
Claims
1. An injection device with adjustable needle insertion depth, characterized in that The application relates to a syringe, which comprises a main body structure (1) and an adjusting assembly (2). The main body structure (1) comprises a needle cylinder (11), a plunger (12) and a needle head (13), the inside of the needle cylinder (11) forms a piston cavity (110), the outer surface of the needle cylinder (11) is provided with a first scale line (14), the plunger (12) is inserted into the piston cavity (110) and is in sliding connection with the piston cavity (110), the needle head (13) is connected with the needle cylinder (11) and communicates with the liquid outlet end of the piston cavity (110), and the needle head (13) is provided with a second scale line (15). The adjusting assembly (2) comprises a positioning sleeve (21) and a locking piece (22), the positioning sleeve (21) is sleeved on the needle head (13) and can move along the axial direction of the needle head (13) so as to adjust the length of the needle head (13) exposed from the positioning sleeve (21), and the locking piece (22) is used for locking the positioning sleeve (21) so as to limit the movement of the positioning sleeve (21) relative to the needle head (13).
2. The adjustable needle depth injector of claim 1, wherein, The needle cylinder (11) comprises an integral main body section (111) and an adapter section (112), the needle head (13) is connected with the adapter section (112), the outer diameter of the adapter section (112) is smaller than the inner diameter of the positioning sleeve (21), and part of the positioning sleeve (21) is sleeved on the adapter section (112).
3. The adjustable needle depth syringe of claim 2, wherein, A positioning hole (211) is formed in the side wall of the positioning sleeve (21) and close to the adapter section (112), the locking piece (22) can pass through the positioning hole (211) and move along the direction close to or away from the adapter section (112), and when the positioning sleeve (21) moves to a preset position, the locking piece (22) can abut against the adapter section (112).
4. The adjustable needle depth syringe of claim 3, wherein, The locking piece (22) is a locking bolt, and the locking bolt is in threaded connection with the positioning hole (211).
5. The adjustable needle depth syringe of claim 3, wherein, The outer surface of the adapter section (112) is provided with an anti-skid pattern.
6. The adjustable needle depth syringe of claim 3, wherein, The length of the positioning sleeve (21) is greater than or equal to the length of the needle head (13) and less than or equal to the sum of the lengths of the needle head (13) and the adapter section (112).
7. The adjustable needle depth injector of claim 1, wherein, An arc-shaped chamfer is arranged at one end of the positioning sleeve (21) close to the tip end of the needle head (13).
8. The adjustable needle depth syringe of claim 1, wherein, The radius of the positioning sleeve (21) gradually decreases from the tail end to the tip end of the needle head (13).
9. The adjustable needle depth injector of claim 1, wherein, The needle head (13) is detachably connected with the needle cylinder (11).
10. The adjustable needle depth injector of claim 1, wherein, The tip end of the needle head (13) is in a bevel type.