Automatic guide mechanism for syringe needle
By utilizing the automatic syringe needle alignment mechanism and the design of the alignment space and sheath, the problem of cross-contamination during syringe needle insertion and withdrawal is solved, enabling a low-cost and rapid sample collection process.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHUHAI LONGTIME BIOLOGICAL TECH CO LTD
- Filing Date
- 2025-04-29
- Publication Date
- 2026-04-21
AI Technical Summary
In existing technologies, the syringe needle can easily cause sample dripping when inserted into and removed from the test tube, resulting in cross-contamination. Furthermore, replacing the guide plate is costly and time-consuming.
An automatic syringe needle alignment mechanism was designed, comprising a base, a first guide plate, a second guide plate, and a sheath. The syringe needle is aligned by gradually changing the alignment space, cross-contamination is prevented by the disposable nature of the sheath, and synchronous movement of the guide plates is achieved by motor drive.
It effectively prevents cross-contamination of test tube samples, reduces the cost of replacing guide plates, saves time, and is easy to operate.
Smart Images
Figure CN224152105U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of sampling tube technology, and in particular to an automatic syringe needle alignment mechanism. Background Technology
[0002] The utility model patent with application number "2024216031901" and patent name "syringe needle guiding mechanism and sampler" discloses a syringe needle guiding mechanism. It adopts a first guide hole and a second guide hole that move synchronously in opposite directions and overlap each other to straighten the syringe needle. The syringe needle needs to be inserted into the test tube to extract the sample. When the syringe needle is pulled out, the sample is easy to drip into the walls of the first guide hole and the second guide hole. When a new syringe needle is used, it is easy to be contaminated and further cross-contaminate the sample in the new test tube. If the guiding mechanism needs to be replaced with a new first guide plate and a new second guide plate each time, the cost is too high and the disassembly and assembly time is too long. Utility Model Content
[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes an automatic syringe needle alignment mechanism that can prevent cross-contamination of samples in test tubes.
[0004] An automatic syringe needle alignment mechanism according to an embodiment of the present invention includes: a base; a first guide plate having a first guide hole extending in the vertical direction, the first guide plate being movable relative to the base in the front-back direction; a second guide plate having a second guide hole extending in the vertical direction, the second guide plate being located below the first guide plate and being movable relative to the base in the opposite direction to the first guide plate; an alignment space defined by the projections of the first guide hole and the second guide hole in the vertical direction, the area of the alignment space gradually changing with the relative movement of the first guide plate and the second guide plate; and a sheath having a needle hole extending in the vertical direction for the syringe needle to be inserted in the vertical direction, the sheath including a stop plate and an alignment tube connected sequentially from top to bottom, the alignment tube extending into the alignment space to align the alignment tube, the stop plate being stopped and positioned above the first guide plate by the alignment space to allow the syringe needle to slide downward relative to the sheath.
[0005] It has at least the following beneficial effects: This guiding mechanism inserts a sheath onto the syringe needle. The syringe needle moves downward first, allowing the guiding tube to extend into the guiding space. The size of the guiding space gradually changes with the relative movement of the first and second guide plates. As the guiding space gradually contracts, it can guide and center the guiding tube and the syringe needle. The stop plate is positioned above the first guide plate by the guiding space, allowing the syringe needle to slide downward relative to the sheath for insertion into the test tube below to extract the sample. After the sample is extracted, the guiding space gradually expands to release the constraint, and the syringe needle moves upward with the sheath. The sheath is disposable and easy to insert and install. Even if the first and second guide holes are contaminated by old samples, they will not directly contact the new syringe needle, thus effectively preventing cross-contamination of the sample in the test tube. It eliminates the need for frequent replacement of the first and second guide plates, reducing costs and saving time.
[0006] According to some embodiments of the present invention, the sheath is made of plastic, and the sheath is interference-fitted with the syringe needle.
[0007] According to some embodiments of the present invention, the inner wall of the needle hole is provided with a plurality of pressure strips along the circumferential direction, the pressure strips extending in the vertical direction and protruding toward the center of the needle hole.
[0008] According to some embodiments of this utility model, the upper end of the needle hole is provided with a guide port, which gradually narrows from top to bottom.
[0009] According to some embodiments of the present invention, the first guide hole includes a first support pin section and a first insertion pin section connected sequentially from back to front, and the second guide hole includes a second insertion pin section and a second support pin section connected sequentially from back to front. The first insertion pin section and the second insertion pin section can be inserted into the straightening tube in sequence. The first support pin section and the second support pin section can overlap each other and gradually close to straighten the straightening tube. When the first guide plate moves forward relative to the base and the second guide plate moves in the opposite direction synchronously, the straightening space gradually contracts until it clamps the straightening tube.
[0010] According to some embodiments of the present invention, both the first and second needle segments are V-shaped and the sharp corners are rounded.
[0011] According to some embodiments of the present invention, a balancing clamp is provided on one side edge of the second guide plate at the sharp corner of the second guide pin section. The balancing clamp extends upward from the upper side of the second guide plate to a position flush with the upper side of the first guide plate. The projection of the balancing clamp in the vertical direction is flush with the edge of the second guide pin section. The balancing clamp and the sharp corner of the first guide pin section can clamp the straightening tube facing each other in the same horizontal direction.
[0012] According to some embodiments of the present invention, the first guide hole further includes a clearance hole, the first guide pin section, the first insert pin section and the clearance hole are connected sequentially from back to front, and the clearance hole can accommodate the balance clamp.
[0013] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description
[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:
[0015] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;
[0016] Figure 2 This is a schematic diagram of the structure of this utility model when the straightening tube is just inserted into the straightening space;
[0017] Figure 3 This is a schematic diagram of the structure of the straightening tube in the straightening space according to an embodiment of the present invention;
[0018] Figure 4 This is a schematic diagram showing the cooperation between the sheath and the syringe needle in an embodiment of this utility model;
[0019] Figure 5 This is a top view of the sheath according to an embodiment of the present utility model;
[0020] Figure 6 This is a cross-sectional view of the sheath according to an embodiment of the present utility model;
[0021] Figure 7 This is a schematic diagram of the syringe needle sheath installation according to an embodiment of the present invention.
[0022] Reference numerals in the attached figures: Base 1, First guide plate 2, First guide hole 21, First needle support section 211, First needle insertion section 212, Clearance hole 213, Second guide plate 3, Second guide hole 31, Second needle insertion section 311, Second needle support section 312, Balance clamp 32, Alignment space 4, Sheath 5, Needle hole 51, Stop plate 52, Alignment tube 53, Pressure strip 54, Guide insertion port 55, Syringe needle 6, Test tube 7, Sheath mounting bracket 8, Syringe clamping seat 81, Positioning stop port 82. Detailed Implementation
[0023] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.
[0024] In the description of this utility model, it should be understood that the orientation descriptions, such as up, down, front, back, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0025] In the description of this utility model, the use of "first" and "second" is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features indicated, or implicitly indicating the order of the technical features indicated.
[0026] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.
[0027] Reference Figures 1 to 7 This utility model discloses an automatic syringe needle alignment mechanism, including a base 1, a first guide plate 2, a second guide plate 3, an alignment space 4, and a protective sleeve 5.
[0028] Reference Figures 1 to 3 The first guide plate 2 has a first guide hole 21 that extends in the vertical direction, and the first guide plate 2 can move relative to the base 1 in the front-back direction; the second guide plate 3 has a second guide hole 31 that extends in the vertical direction, the second guide plate 3 is located below the first guide plate 2 and can move relative to the base 1 in the opposite direction to the first guide plate 2.
[0029] Reference Figure 2 and Figure 3 The straightening space 4 is defined by the projection of the first guide hole 21 and the second guide hole 31 in the vertical direction. The size of the straightening space 4 gradually changes with the relative movement of the first guide piece 2 and the second guide piece 3.
[0030] Reference Figures 2 to 6The sheath 5 has a needle hole 51 that runs through it in the vertical direction. The needle hole 51 allows the syringe needle 6 to be inserted in the vertical direction. The sheath 5 includes a stop plate 52 and a straightening tube 53 connected in sequence from top to bottom. The straightening tube 53 extends into the straightening space 4 so that the straightening space 4 straightens the straightening tube 53.
[0031] It is understandable that when the first guide plate 2 moves relative to the second guide plate 3 in one of the directions, the straightening space 4 gradually contracts. During this process, the straightening tube 53 and the syringe needle 6, which are in a deviated state, can be gradually straightened and aligned. When the straightening space 4 contracts to its minimum state, the straightening tube 53 and the syringe needle 6 are just in the preset alignment state.
[0032] When the straightening space 4 is contracted to its minimum state, the stop plate 52 is stopped and positioned on the upper side of the first guide plate 2 by the straightening space 4, so that the syringe needle 6 can slide downward relative to the sheath 5.
[0033] It should be noted that this guiding mechanism is part of the sampler. The sampler is equipped with a lifting mechanism that drives the syringe to move up and down. The guiding mechanism is also equipped with a translation linkage mechanism that can drive the first guide plate 2 and the second guide plate 3 to move synchronously in opposite directions. The translation linkage mechanism can adopt a structure of motor drive connecting a gear and two opposing racks.
[0034] The guiding mechanism inserts the sheath 5 onto the syringe needle 6. The syringe needle 6 moves downward first, allowing the guiding tube 53 to extend into the guiding space 4. The area of the guiding space 4 gradually changes with the relative movement of the first guide plate 2 and the second guide plate 3. As the guiding space 4 gradually contracts, it can guide and center the guiding tube 53 and the syringe needle 6. The stop plate 52 is stopped and positioned above the first guide plate 2 by the guiding space 4, allowing the syringe needle 6 to slide downward relative to the sheath 5 so as to be inserted into the test tube 7 below to extract the sample. After the sample is extracted, the guiding space 4 gradually expands to release the constraint, and the syringe needle 6 moves upward together with the sheath 5.
[0035] The sheath 5 is designed for single use and is easy to install. Even if the first guide hole 21 and the second guide hole 31 are contaminated by old samples, they will not directly come into contact with the new syringe needle 6, thus effectively preventing cross-contamination of the sample in the test tube 7. This eliminates the need for frequent replacement of the first guide plate 2 and the second guide plate 3, reducing costs and saving time.
[0036] Reference Figure 7The sheath 5 can be inserted and installed on the syringe needle 6 using the sheath mounting bracket 8. The sheath mounting bracket 8 includes a syringe clamp 81 and a positioning stop 82. The syringe is positioned and placed in the syringe clamp 81, so that the syringe needle 6 passes through the positioning stop 82 and the syringe is fixed. Then the sheath 5 is inserted into the syringe needle 6 from one side of the positioning stop 82. When the sheath 5 is stopped by the positioning stop 82, the sheath 5 is exactly in the preset position on the syringe needle 6. Then the syringe is removed and installed on the sampler. The operation is very convenient and quick.
[0037] In some embodiments, refer to Figure 4 The sheath 5 is made of plastic, rubber or other flexible materials, and the sheath 5 is interference-fitted with the syringe needle 6. This ensures that the sheath 5 is locked in place with the syringe needle 6, allowing the sheath 5 to move up and down with the syringe needle 6 when it is not clamped, while also ensuring that the syringe needle 6 can slide downward relative to the sheath 5 when the stop plate 52 is stopped by the space 4.
[0038] Reference Figure 5 and Figure 6 Multiple pressure strips 54 can be provided on the inner wall of the needle hole 51 along the circumferential direction. The pressure strips 54 extend in the vertical direction and protrude toward the center of the needle hole 51. The pressure strips 54 can elastically press the syringe needle 6 to prevent the syringe needle 6 from easily detaching from the needle hole 51.
[0039] In some embodiments, refer to Figures 4 to 7 The upper end of the needle hole 51 is provided with a guide port 55, which gradually narrows from top to bottom. The guide port 55 facilitates the insertion of the syringe needle and makes it easier to install the sheath 5 onto the syringe needle 6.
[0040] Reference Figure 2 and Figure 3 In some embodiments of this utility model, the first guide hole 21 includes a first guide pin section 211 and a first insert pin section 212 connected sequentially from back to front, and the second guide hole 31 includes a second insert pin section 311 and a second guide pin section 312 connected sequentially from back to front. The first insert pin section 212 and the second insert pin section 311 can be inserted into the straightening tube 53 in sequence, and the first guide pin section 211 and the second guide pin section 312 can overlap each other and gradually close to straighten the straightening tube 53.
[0041] When the first guide plate 2 moves forward relative to the base 1 and the second guide plate 3 moves in the opposite direction, the straightening space 4 gradually contracts until it clamps the straightening tube 53, so that the syringe needle 6 can be completely aligned with the test tube 7. Moreover, as the syringe needle 6 slides downward relative to the sheath 5, the straightening space 4 can continue to provide precise guidance, preventing the syringe needle 6 from bending or deviating, and ensuring that the syringe needle 6 is smoothly inserted into the test tube 7.
[0042] Similarly, after sampling is completed, when the first guide plate 2 moves backward relative to the base 1 and the second guide plate 3 moves in the opposite direction, the straightening space 4 gradually expands and the straightening tube 53 is released, so that the straightening tube 53 and the syringe needle 6 can move upward and leave the straightening space 4.
[0043] The first needle segment 211 and the second needle segment 312 are both V-shaped with rounded corners at the sharp corners, so that the shape of the straightening space 4 formed by the first needle segment 211 and the second needle segment 312 perfectly matches the shape of the straightening tube 53.
[0044] Reference Figure 2 and Figure 3 In some embodiments, the second guide plate 3 is provided with a balancing clamp 32 on one side edge of the sharp corner of the second needle section 312. The balancing clamp 32 extends upward from the upper side of the second guide plate 3 to a position flush with the upper side of the first guide plate 2. The projection of the balancing clamp 32 in the vertical direction is flush with the edge of the second needle section 312. The balancing clamp 32 and the sharp corner of the first needle section 211 can clamp the straightening tube 53 in the same horizontal direction, which plays a role in clamping and balancing, and prevents the straightening tube 53 and the syringe needle 6 from shearing and bending.
[0045] In addition, the first guide hole 21 may also include a clearance hole 213. The first guide pin section 211, the first insert pin section 212 and the clearance hole 213 are connected in sequence from back to front. When the straightening space 4 is in its maximum state, the clearance hole 213 can accommodate the balance clamp 32 to prevent interference.
[0046] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0047] Of course, this utility model is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of this utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.
Claims
1. An autoindexing mechanism for a syringe needle, comprising: include: Base; The first guide plate has a first guide hole that extends in the vertical direction, and the first guide plate is movable relative to the base in the front-back direction. The second guide plate has a second guide hole that extends in the vertical direction. The second guide plate is located below the first guide plate and can move relative to the base in the opposite direction to the first guide plate. The straightening space is defined by the projections of the first guide hole and the second guide hole in the vertical direction, and the area of the straightening space gradually changes as the first guide plate and the second guide plate move relative to each other. The sheath has a needle hole that runs through it in the vertical direction, through which the syringe needle is inserted. The sheath includes a stop plate and a straightening tube connected sequentially from top to bottom. The straightening tube extends into the straightening space so that the straightening space straightens the straightening tube. The stop plate is stopped and positioned by the straightening space on the upper side of the first guide plate so that the syringe needle can slide downward relative to the sheath.
2. An autoindex mechanism for a syringe needle as defined in claim 1, wherein The sheath is made of plastic and is interference-fitted with the syringe needle.
3. An autoindex mechanism for a syringe needle according to claim 2, wherein The inner wall of the needle hole is provided with multiple pressure strips along the circumference, and the pressure strips extend in the vertical direction and protrude toward the center of the needle hole.
4. An autoindex mechanism for a syringe needle according to claim 1, wherein The upper end of the needle hole is provided with a guide port, which gradually narrows from top to bottom.
5. An autoindex mechanism for a syringe needle according to claim 1 wherein, The first guide hole includes a first support pin section and a first insertion pin section connected sequentially from back to front. The second guide hole includes a second insertion pin section and a second support pin section connected sequentially from back to front. The first insertion pin section and the second insertion pin section can be inserted into the straightening tube in sequence. The first support pin section and the second support pin section can overlap each other and gradually close to straighten the straightening tube. When the first guide plate moves forward relative to the base and the second guide plate moves in the opposite direction synchronously, the straightening space gradually contracts until it clamps the straightening tube.
6. An autoindex mechanism for a syringe needle according to claim 5, wherein, Both the first and second needle segments are V-shaped with rounded corners at the sharp edges.
7. An autoindex mechanism for a syringe needle according to claim 6, wherein The second guide plate has a balancing clamp on one side edge at the sharp corner of the second guide pin section. The balancing clamp extends upward from the upper side of the second guide plate to a position flush with the upper side of the first guide plate. The projection of the balancing clamp in the vertical direction is flush with the edge of the second guide pin section. The balancing clamp and the sharp corner of the first guide pin section can clamp the straightening tube facing each other in the same horizontal direction.
8. An autoindex mechanism for a syringe needle according to claim 7, wherein The first guide hole also includes a clearance hole. The first guide pin section, the first insert pin section and the clearance hole are connected sequentially from back to front. The clearance hole can accommodate the balance clamp.