A three-in-one forceps
By integrating tweezers, a hammer, and a telescopic steel needle into a single tool, the problem of frequent tool changes in Oncomelania snail detection is solved, enabling efficient and convenient Oncomelania snail detection operations.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 马鞍山市疾病预防控制中心(马鞍山市卫生监督所)
- Filing Date
- 2025-07-25
- Publication Date
- 2026-07-24
AI Technical Summary
The detection of Oncomelania snails requires frequent changes of multiple tools, which increases the number of steps and can easily lead to sample loss or contamination.
Design a three-in-one tweezers that integrates tweezers, a hammer, and a telescopic steel needle into a single tool. Function switching is achieved through the rotational cooperation between the connecting shaft and the sleeve, enabling integrated operation.
Significantly reduces operational steps, improves testing efficiency, and avoids sample drop and contamination.
Smart Images
Figure CN224544284U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of schistosomiasis prevention and control, specifically a three-in-one pair of tweezers. Background Technology
[0002] The snail's body consists of two parts: an exoskeleton and an operculum, and a soft body. The snail's exoskeleton is conical in shape. Generally, snails in lake and marsh areas are relatively large, typically measuring (3.49-4.24) mm x (8.64-9.73) mm; snails in water network areas are (3.13-3.20) mm x (7.54-7.87) mm; and snails in mountainous areas are the smallest, measuring (2.71-2.85) mm x (5.80-6.93) mm. Snails are intermediate hosts for schistosomiasis, and their detection is a core component of schistosomiasis control. The aim is to assess the risk of schistosomiasis transmission by monitoring the distribution, density, and infection status of snails, providing a scientific basis for developing control strategies.
[0003] The tapping method is a common way to determine the liveness of Oncomelania snails. The snail is held on a flat plate with tweezers and gently tapped with a small hammer to break it. The soft tissue of the snail will show a contraction reaction. For detecting infected Oncomelania snails, the broken snail is placed on a glass slide with tweezers and placed under a dissecting microscope or microscope. The soft tissue of the snail is then dissected with a dissecting needle and observed under the microscope. In recent years, methods based on Schistosoma nucleic acid detection have been widely used for detecting infected Oncomelania snails. This requires breaking the snail and using a dissecting needle to collect the soft tissue into a clean centrifuge tube for further nucleic acid testing. All of these snail detection methods require multiple tools, including tweezers, a tapping hammer, and a dissecting needle. Frequent tool changes not only increase the number of steps but also increase the risk of sample loss or contamination during tool switching. Utility Model Content
[0004] The purpose of this invention is to provide a three-in-one tweezers to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a three-in-one tweezers, including tweezers, a connecting shaft at the tail end of the tweezers, the connecting shaft being located between the two tweezer arms for connecting the two tweezer arms, a sleeve being rotatably connected to the connecting shaft, a limit stop being provided on the connecting shaft for limiting the rotation angle of the sleeve, a hammer handle being fixed at the bottom of the sleeve, a hammer head being fixed at the bottom end of the hammer handle, and a telescopic steel needle being provided at the front end of the tweezers, the tip of the steel needle being able to extend or retract to the front end of the tweezers.
[0006] Preferably, the connecting shaft includes a detachable left half shaft and a right half shaft, which are respectively fixed to the tail end of the tweezers. A stepped groove is provided at the end of the right half shaft near the left half shaft. A sleeve is installed in the stepped groove. Limiting blocks are respectively fixed on the left half shaft and the right half shaft and are aligned. The distance between the two limiting blocks is less than the diameter of the hammer handle.
[0007] Preferably, a positioning plug is provided at the end of the left half shaft, and a corresponding slot is provided on the right half shaft. The positioning plug is provided with a threaded hole, and a countersunk hole is provided on the tail side of one of the tweezer arms. A connecting screw is inserted into the countersunk hole, and the front end of the connecting screw is screwed into the threaded hole.
[0008] Preferably, damping is provided between the sleeve and the left and right half-shafts, allowing the hammer handle to be suspended arbitrarily within the rotation range.
[0009] Preferably, the hammer head is cylindrical and located between the two tweezer arms. The tweezer arms are provided with a clearance arc corresponding to the position of the hammer head, so that the tweezer arms do not contact the hammer head when the front end of the tweezers picks up the sample.
[0010] Preferably, the tweezers have a locking knob at the front end to lock the steel needle.
[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0012] Traditional methods for detecting Oncomelania hupensis require the use of multiple tools, such as tweezers for grasping, hammer for crushing, and steel needle for picking. Frequent tool changes not only increase the number of steps but also increase the risk of sample loss or contamination during tool switching. This invention integrates tweezers, a hammer, and a telescopic steel needle into a single tool. Function switching is achieved through the rotation of a connecting shaft and a sleeve, eliminating the need for carrying or changing additional tools, significantly reducing operational steps, and substantially improving overall detection efficiency. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0014] Figure 2 for Figure 1 Schematic diagram of the structure at point A;
[0015] Figure 3 for Figure 1 The front view;
[0016] Figure 4 for Figure 3 Side view.
[0017] In the diagram: 1. Tweezers; 2. Connecting shaft; 21. Left half shaft; 22. Right half shaft; 23. Stepped groove; 24. Positioning plug; 25. Countersunk hole; 26. Connecting screw; 3. Limiting block; 4. Sleeve; 5. Hammer handle; 6. Hammer head; 7. Steel needle; 8. Fastening knob; 9. Avoidance arc. Detailed Implementation
[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0019] like Figure 1 As shown, the core structure of this three-in-one tweezers includes tweezers 1, connecting shaft 2, sleeve 4, hammer handle 5, hammer head 6, and steel needle 7. The assembly and fitting relationship of each component is as follows:
[0020] Connection between tweezers 1 and connecting shaft 2: Connecting shaft 2 consists of a detachable left half-shaft 21 and a right half-shaft 22, which are respectively fixed to the tail ends of the two tweezer arms of tweezers 1. During assembly, insert the positioning plug 24 at the end of the left half-shaft 21 into the corresponding slot of the right half-shaft 22, so that the left half-shaft 21 and the right half-shaft 22 are precisely aligned. At this time, the threaded hole on the left half-shaft 21 is aligned with the countersunk hole 25 on the tail side of the tweezer arm. Insert the connecting screw 26 into the countersunk hole 25 and screw it into the threaded hole to achieve a tight connection between the left half-shaft 21 and the right half-shaft 22, thereby stably connecting the two tweezer arms into one unit.
[0021] Assembly of Sleeve 4 and Hammer Handle 5: Sleeve 4 is installed in the stepped groove 23 of the right half-shaft 22 and can rotate around the connecting shaft 2. Limiting blocks 3 are fixed on both the left half-shaft 21 and the right half-shaft 22 and are aligned. The distance between the two limiting blocks 3 is less than the diameter of the hammer handle 5, which can effectively limit the rotation angle of sleeve 4 and prevent excessive rotation of hammer handle 5 from affecting operation. At the same time, a damping structure is set between sleeve 4 and the left half-shaft 21 and the right half-shaft 22, so that hammer handle 5 can be suspended at will within the rotation range limited by the limiting blocks 3, which makes it convenient for operators to adjust the position of hammer head 6 according to usage needs. The top of hammer handle 5 is fixed to the bottom of sleeve 4, and hammer head 6 is fixed to the bottom of hammer handle 5. Hammer head 6 is cylindrical and located between the two tweezer arms. A clearance arc 9 is set on the tweezer arms corresponding to the position of hammer head 6 to ensure that the tweezer arms do not contact hammer head 6 when the front end of tweezers 1 grasps the sample.
[0022] Installation and adjustment of steel needle 7: The front end of the tweezers 1 is equipped with a telescopic steel needle 7. The tip of the steel needle 7 can extend or retract from the front end of the tweezers 1. The front end of the tweezers 1 is equipped with a fastening knob 8. Tightening the fastening knob 8 can lock the steel needle 7 in the current position, and loosening it can adjust the extension length of the steel needle 7.
[0023] Operation and usage steps
[0024] Snail gripping: Hold the tweezers 1 by the tweezers arm, open the front clamping jaws, align with the target snail, and slowly close the tweezers arm. Use the clamping force at the front of the tweezers 1 to stably grip the snail, ensuring that the snail does not fall off during the gripping process.
[0025] Shell Breaking: Keep the snail stable when gripping it with tweezers 1. Rotate the hammer handle 5 until the hammer head 6 is aligned with the area of the snail shell to be broken. Use your wrist to apply force to drive the hammer handle 5, causing the hammer head 6 to gently tap the snail shell until cracks or breaks. Be careful to control the tapping force to avoid excessive damage to the internal soft tissue. During tapping, the limit stop 3 prevents the hammer handle 5 from rotating excessively, ensuring operational safety.
[0026] Soft tissue extraction: After the shell of the snail is broken, if the steel needle 7 does not extend, loosen the fastening knob 8 to extend the steel needle 7 appropriately and lock it. Then, use the tip of the steel needle 7 to extract the soft tissue of the snail from the broken shell to complete the testing operation.
[0027] Maintenance and disassembly: When cleaning tools or replacing parts is required, loosen the connecting screw 26 in the countersunk hole 25 on the tail side of the tweezers arm, so that the front end of the connecting screw 26 can be unscrewed from the threaded hole of the positioning plug 24 of the left half shaft 21. Then separate the left half shaft 21 and the right half shaft 22, and you can clean or maintain the tweezers 1, connecting shaft 2, sleeve 4, hammer handle 5 and other parts individually. After maintenance, reassemble according to the above assembly steps.
[0028] This utility model achieves integrated operation of "clamping-crushing-picking" through integrated design, eliminating the need for frequent tool changes and effectively improving the efficiency of Oncomelania snail detection. Furthermore, the components work together precisely and are easy to operate, making it suitable for Oncomelania snail detection scenarios.
[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A three-in-one tweezers, comprising tweezers (1), characterized in that: The tweezers (1) are provided with a connecting shaft (2) at the tail end. The connecting shaft (2) is located between the two tweezer arms of the tweezers (1) and is used to connect the two tweezer arms. A sleeve (4) is rotatably connected to the connecting shaft (2). A limit stop (3) is provided on the connecting shaft (2) to limit the rotation angle of the sleeve (4). A hammer handle (5) is fixed at the bottom of the sleeve (4). A hammer head (6) is fixed at the bottom of the hammer handle (5). A telescopic steel needle (7) is provided at the front end of the tweezers (1). The tip of the steel needle (7) can extend or retract at the front end of the tweezers (1).
2. The three-in-one tweezers according to claim 1, characterized in that: The connecting shaft (2) includes a detachable left half shaft (21) and a right half shaft (22), which are fixed to the tail end of the tweezers (1). The right half shaft (22) has a stepped groove (23) near the left half shaft (21). The sleeve (4) is installed in the stepped groove (23). The limiting blocks (3) are fixed on the left half shaft (21) and the right half shaft (22) respectively and are aligned. The distance between the two limiting blocks (3) is less than the diameter of the hammer handle (5).
3. The three-in-one tweezers according to claim 2, characterized in that: A positioning plug (24) is provided at the end of the left half shaft (21), and a corresponding slot is provided on the right half shaft (22). A threaded hole is provided on the positioning plug (24), and a countersunk hole (25) is provided on the tail side of one of the tweezer arms. A connecting screw (26) is inserted into the countersunk hole (25), and the front end of the connecting screw (26) is screwed into the threaded hole.
4. The three-in-one tweezers according to claim 3, characterized in that: Damping is provided between the sleeve (4) and the left half shaft (21) and the right half shaft (22), and the hammer handle (5) can be suspended arbitrarily within the rotation range.
5. The three-in-one tweezers according to claim 1, characterized in that: The hammer (6) is cylindrical and located in the middle of the two tweezer arms. The tweezer arms are provided with a clearance arc (9) corresponding to the position of the hammer (6). When the front end of the tweezers (1) picks up the sample, the tweezer arms do not contact the hammer (6).
6. The three-in-one tweezers according to claim 1, characterized in that: The tweezers (1) have a fastening knob (8) at the front end to lock the steel needle (7).