A semi-automatic follicular fluid collection device

Abstract

The application discloses a kind of follicular fluid semi-automatic collection devices, it is related to medical auxiliary equipment technical field.The base is provided with lifting frame in the upper portion of base, and the upper end of lifting frame is provided with conveying mechanism, and the upper portion of conveying mechanism is provided with switching mechanism, and lifting adjusting mechanism is arranged between lifting frame and base, and egg retrieval needle is arranged outside switching mechanism, and negative pressure equipment is arranged on the base.The automatic operation of conveying mechanism, switching mechanism and push mechanism realizes the direct transmission of follicular fluid collection tube from collection station to egg retrieval technician, saves the intermediate artificial link of nurse reception and technician secondary transmission, reduces the labor input of two or more, and significantly reduces the medical labor cost.The conveying operation does not need manual handover, avoids the problems such as efficiency lag and cooperation failure in manual transmission, shortens the interval time of follicular fluid from collection to egg retrieval, and guarantees the activity of ovum.

Description

Technical Field

[0001] This invention relates to the field of medical auxiliary equipment technology, and in particular to a semi-automatic follicular fluid collection device. Background Technology

[0002] In the field of assisted reproductive technology, egg retrieval is a crucial and core step, and its procedure must strictly adhere to aseptic standards and operational protocols. During the procedure, medical staff puncture the follicles with a retrieval needle and collect the follicular fluid and eggs together using a negative pressure device. The collected follicular fluid must then be processed to separate the eggs. Egg retrieval must be performed by a professional technician and requires extremely high speed and a clean environment. It must be done quickly after the follicular fluid collection to ensure egg viability.

[0003] In the current oocyte retrieval process, the intermediate transfer of follicular fluid after collection often relies on manual intervention. Typically, a nurse must specifically receive the collected follicular fluid container and pass it to the first technician. If further processing or transfer is required after receiving the fluid, it must be manually passed again to the next technician before oocyte retrieval and subsequent procedures can begin. This transfer method requires two or more additional personnel, increasing medical labor costs. Furthermore, the transfer efficiency is easily affected by staff cooperation, potentially delaying oocyte retrieval and failing to meet the clinical requirements for efficient, precise, and low-labor-consumption procedures. Summary of the Invention

[0004] The purpose of this invention is to provide a semi-automatic follicular fluid collection device, which solves the technical problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a semi-automatic follicular fluid collection device, comprising a base, with support legs provided at the four corners of the lower surface of the base, a lifting frame provided above the base, a conveying mechanism provided at the upper end of the lifting frame, a switching mechanism provided above the conveying mechanism, a lifting adjustment mechanism provided between the lifting frame and the base, an egg retrieval needle provided outside the switching mechanism, and a negative pressure device provided on the base; The lifting and adjusting mechanism includes an internal threaded adjusting cylinder and two limiting cylinders. The two limiting cylinders are symmetrically connected to the top of the base. The internal threaded adjusting cylinder is rotatably connected to the base. A lifting limiting column is slidably connected inside the limiting cylinder. The upper end of the lifting limiting column is fixedly connected to the lower end of the lifting frame. An adjusting threaded rod is internally threaded to the internal threaded adjusting cylinder. The upper end of the adjusting threaded rod is fixedly connected to the lower end of the lifting frame.

[0006] Preferably, the conveying mechanism includes a conveying outer box, an adjustment and control module is provided at the front end of the conveying outer box, a movable frame is fixedly connected to the rear inner wall of the conveying outer box, a movable block is provided inside the movable frame, a conveying motor is fixedly connected to the left end of the movable frame, a conveying screw is fixedly connected to the output end of the conveying motor, the right end of the conveying screw passes through the left side wall of the movable frame and the movable block in sequence, the right end of the conveying screw is rotatably connected to the right inner wall of the movable frame, the conveying screw is threadedly connected to the movable block, a conveying limit rod is fixedly connected to the left inner wall of the movable frame, the right end of the conveying limit rod passes through the movable block and is fixedly connected to the right inner wall of the movable frame, a limit tube is fixedly connected to the upper end of the movable block, and a connecting hole is provided on the upper side wall of the conveying outer box; The switching mechanism includes a switching outer frame fixed to the upper end of the conveying outer box. An observation window is provided at the front end of the switching outer frame, and a second connecting hole is provided on the lower side wall of the switching outer frame. The second connecting hole and the connecting hole are coaxially arranged.

[0007] Preferably, a contact sensor one and a contact sensor two are fixedly connected to the rear inner wall of the conveying outer box, the rear end of the moving block extends between the contact sensor one and the contact sensor two, a discharge hole is opened on the upper side wall of the conveying outer box, a baffle brush is provided inside the discharge hole, and a number of inner clamping elastic plates are symmetrically fixedly connected to the front and rear sides of the inner side wall of the limiting tube, and the end of the inner clamping elastic plate away from the side wall of the limiting tube is inclined downward.

[0008] Preferably, two push holes are provided on the side wall of the limiting tube, the lower ends of the two push holes are open, and the two push holes are symmetrically arranged in the left and right directions. A fixing plate is provided on the right side of the limiting tube, and the front and rear ends of the fixing plate are fixedly connected to the front and rear inner walls of the conveying outer box, respectively. A passive push plate is fixedly connected to the left end of the fixing plate. The passive push plate has a triangular structure and is located directly below the discharge hole.

[0009] Preferably, the switching mechanism further includes two auxiliary frames symmetrically arranged inside the switching outer frame. Each of the two auxiliary frames has an extension hole on its longitudinal sidewall. An auxiliary support plate is fixedly connected to one end of the longitudinal sidewall of each of the two auxiliary frames that is far apart from each other. A push belt is provided above the auxiliary support plate. Several push plates are fixedly connected to the outer sidewall of the push belt. The end of the push plate that is far away from the push belt passes through the extension hole and extends to the position between the two auxiliary frames. Two rotating shafts are provided at the upper end of the auxiliary support plate. A drive motor is provided below the auxiliary frame. The output end of the drive motor is connected to one of the rotating shafts.

[0010] Preferably, the right side of the push belt is provided with an abutting arc plate, the right ends of the front and rear abutting arc plates are bent toward each other, the left ends of the upper and lower side walls of the abutting arc plates are rotatably connected to the upper and lower side inner walls of the extension hole, the two abutting arc plates are fixedly connected to each other at their respective ends, and the end of the connecting spring away from the abutting arc plate is fixedly connected to a pressure detection sensor, the pressure detection sensor is fixed on the inner side wall of the switching outer frame, the adjacent side walls of the two auxiliary frames are fixedly connected to limit side plates, a bottom support frame is provided between the two auxiliary frames, the front and rear outer walls of the bottom support frame are fixedly connected to the adjacent side walls of the two auxiliary frames, the extension hole is located between the limit side plate and the bottom support frame, and a push mechanism is provided on the right side of the bottom support frame.

[0011] Preferably, a connecting electric push rod is fixedly connected to the upper end of the switching outer frame. The output end of the connecting electric push rod passes through the upper side wall of the switching outer frame and is fixedly connected to a lifting plate. An abutment cylinder is provided below the lifting plate. A through hole one and a through hole two are provided on the upper side wall of the abutment cylinder. A negative pressure insertion tube and a delivery insertion tube are provided at the lower end of the lifting plate. The negative pressure insertion tube and the delivery insertion tube are respectively located above the through hole one and the through hole two. The negative pressure insertion tube is connected to a negative pressure device. A delivery tube is connected to the delivery insertion tube. The end of the delivery tube away from the delivery insertion tube is connected to an egg retrieval needle. At least two sliding rods are fixedly connected to the upper end of the abutment cylinder. The upper end of the sliding rod passes through the lifting plate and is fixedly connected to an upper top plate. An abutment spring is sleeved on the sliding rod. The upper and lower ends of the abutment spring are fixedly connected to the adjacent side walls of the lifting plate and the abutment cylinder, respectively.

[0012] Preferably, the pushing mechanism includes a pushing motor fixed to the upper end of the switching outer frame, a pushing frame, two limiting slide rods fixed to the upper inner wall of the switching outer frame, and two limiting plates. The output end of the pushing motor passes through the switching outer frame and is fixedly connected to a pushing screw. The lower end of the pushing screw passes through the pushing frame and is rotatably connected to the lower inner wall of the switching outer frame. The lower end of the limiting slide rod passes through the pushing frame and is fixedly connected to the lower inner wall of the switching outer frame. A pushing column is fixedly connected to the left end of the pushing frame. The pushing column is located directly above the second connecting hole. The left end of the limiting plate is fixedly connected to the right end of the longitudinal side wall of the auxiliary frame. The lower ends of the front and rear limiting plates are hinged to a bearing plate. A torsion spring is provided at the hinge point between the bearing plate and the limiting plate. The position of the bearing plate is lower than the bottom support frame.

[0013] Preferably, the right ends of the two limiting plates are not connected, and the connection between the pusher and the pusher column is located directly above the gap between the right ends of the two limiting plates.

[0014] Preferably, an indicator light and an egg retrieval start button are provided at the location of the egg retrieval needle. The indicator light is used to indicate that the negative pressure cannula and the delivery cannula are fully inserted into the collection tube, and the egg retrieval start button is used to control the negative pressure equipment.

[0015] Compared with related technologies, the semi-automatic follicular fluid collection device provided by the present invention has the following beneficial effects: In the field of assisted reproductive technology, egg retrieval is a crucial and core step, and its procedure must strictly adhere to aseptic standards and operational protocols. During the procedure, medical staff puncture the follicles with a retrieval needle and collect the follicular fluid and eggs together using a negative pressure device. The collected follicular fluid must then be processed to separate the eggs. Egg retrieval must be performed by a professional technician and requires extremely high speed and a clean environment. It must be done quickly after the follicular fluid collection to ensure egg viability.

[0016] 2. This invention provides a semi-automatic follicular fluid collection device. The screw drive and limit rod guiding structure of the conveying mechanism, the flexible contact positioning and pressure detection design of the switching mechanism, combined with the precise pushing function of the pushing mechanism, ensure stable and accurate transmission of the collection tube throughout the process, effectively avoiding the risk of follicular fluid loss or contamination caused by container shaking or tilting during manual transfer. Simultaneously, the passive pusher plate ensures that after the moving block contacts the second contact sensor, the triangular passive pusher plate inserts into the pushing hole, allowing the collection tube inside the limit tube to move upwards along the inclined surface of the passive pusher plate. This ensures that the upper end of the collection tube can pass through the discharge port and move above the outer conveying box, facilitating retrieval by egg collectors.

[0017] 3. This invention provides a semi-automatic follicular fluid collection device. The lifting and adjusting mechanism, through a combination of threaded transmission and sliding limit, can smoothly and accurately adjust the height of the device, ensuring that the right end of the outer delivery box in the device can extend to the egg retrieval and sampling window. The device as a whole adopts a semi-automatic modular design, with each mechanism operating independently yet smoothly in coordination. The indicator light and operation button at the egg retrieval needle simplify start-stop control, reduce the difficulty of operation for medical staff, and reduce the risk of misoperation. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the conveying mechanism structure of the present invention; Figure 3 This is a cross-sectional schematic diagram of the conveying structure of the present invention; Figure 4 For the present invention Figure 3 Enlarged view of point A in the middle; Figure 5 This is a schematic diagram of the limiting tube structure of the present invention; Figure 6This is a schematic diagram of the switching mechanism structure of the present invention; Figure 7 This is a schematic diagram of the internal structure of the switching mechanism of the present invention; Figure 8 This is a schematic diagram of the bottom support frame structure of the present invention; Figure 9 This is a schematic diagram showing the positional relationship between the push plate and the acquisition tube of the present invention; Figure 10 This is a schematic diagram of the cross-sectional structure of the switching outer frame of the present invention; Figure 11 For the present invention Figure 10 Enlarged view at point B in the middle; Figure 12 This is a schematic diagram of the support plate structure of the present invention.

[0019] In the diagram: 1. Base; 2. Support leg; 3. Lifting frame; 4. Adjusting threaded rod; 5. Internal threaded adjusting cylinder; 6. Lifting limit post; 7. Limiting cylinder; 8. Conveying mechanism; 801. Conveying outer box; 802. Adjustment control module; 803. Discharge hole; 804. Baffle brush; 805. Moving frame; 806. Conveying motor; 807. Conveying screw; 808. Conveying limit rod; 809. Contact sensor one; 810. Connecting hole one; 811. Moving block; 812. Limiting tube; 813. Contact sensor two; 814. Fixing plate; 815. Passive push plate; 816. Inner clamping elastic plate; 817. Pushing hole; 9. Switching mechanism; 901. Switching outer frame; 902. Discharge hole; 903. Sealing door; 904. Observation window; 905. Auxiliary frame; 906. Bottom support frame 907. Limiting side plate; 908. Drive motor; 909. Auxiliary support plate; 910. Pushing belt; 911. Pushing baffle; 912. Rotating shaft; 913. Extension hole; 914. Pressure detection sensor; 915. Connecting spring; 916. Abutting arc plate; 917. Limiting plate; 918. Bearing plate; 919. Connecting electric push rod; 920. Pushing motor; 921. Connecting hole two; 922. Pushing frame; 923. Limiting slide rod; 924. Pushing screw; 925. Pushing column; 926. Lifting plate; 927. Abutting cylinder; 928. Sliding rod; 929. Abutting spring; 930. Top plate; 931. Through hole one; 932. Through hole two; 933. Negative pressure insertion tube; 934. Delivery insertion tube; 10. Negative pressure equipment; 11. Delivery pipe; 12. Egg retrieval needle. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0021] Example 1: Please refer to Figure 1 - Figure 5 This invention provides a technical solution: a semi-automatic follicular fluid collection device, comprising a base 1, with support legs 2 at each of the four corners of the lower surface of the base 1, a lifting frame 3 above the base 1, a conveying mechanism 8 at the upper end of the lifting frame 3, a switching mechanism 9 above the conveying mechanism 8, a lifting adjustment mechanism between the lifting frame 3 and the base 1, an oocyte retrieval needle 12 outside the switching mechanism 9, a negative pressure device 10 on the base 1, and an indicator light and an oocyte retrieval start button at the position of the oocyte retrieval needle 12. The indicator light is used to indicate the negative pressure cannula 933 and the conveying cannula 933. 34. Once fully inserted into the collection tube, the egg retrieval start button controls the negative pressure device 10. The negative pressure cannula 933 and the delivery cannula 934 pass through the through hole 1 931 and through hole 2 932 on the contact tube 927, respectively. After being precisely inserted into the collection tube, the electric push rod 919 is connected and pushed to the preset position. The indicator light at the egg retrieval needle 12 illuminates. The operator presses the egg retrieval start button to start the negative pressure device 10. The electric push rod 919 is connected and pushed to the preset position. The indicator light at the egg retrieval needle 12 illuminates. The operator presses the egg retrieval start button to start the negative pressure device 10. The lifting and adjusting mechanism includes an internal threaded adjusting cylinder 5 and two limiting cylinders 7. The two limiting cylinders 7 are symmetrically connected to the top of the base 1. The internal threaded adjusting cylinder 5 is rotatably connected to the base 1. A lifting limiting column 6 is slidably connected inside the limiting cylinder 7. The upper end of the lifting limiting column 6 is fixedly connected to the lower end of the lifting frame 3. An adjusting threaded rod 4 is internally threadedly connected to the internal threaded adjusting cylinder 5. The upper end of the adjusting threaded rod 4 is fixedly connected to the lower end of the lifting frame 3. Before use, the position of the conveying mechanism 8 is adjusted through the lifting and adjusting mechanism to adapt to the egg collection scenario. Specifically, the internal threaded adjusting cylinder 5 on the base 1 is rotated. By utilizing its threaded engagement with the adjusting threaded rod 4, the lifting frame 3 and the upper conveying mechanism 8 and switching mechanism 9 are lifted and lowered as a whole. At the same time, the lifting limiting column 6 slides along the limiting cylinder 7 to achieve guide and limit, ensuring smooth and accurate adjustment. Finally, the right end of the outer conveying box 801 extends to the position of the egg collection and sampling window to meet the needs of subsequent collection tube transmission and technician retrieval. The conveying mechanism 8 includes a conveying outer box 801. An adjustment and control module 802 is provided at the front end of the conveying outer box 801. A movable frame 805 is fixedly connected to the inner rear wall of the conveying outer box 801. A movable block 811 is provided inside the movable frame 805. A conveying motor 806 is fixedly connected to the left side of the movable frame 805. A conveying screw 807 is fixedly connected to the output end of the conveying motor 806. The right side of the conveying screw 807 passes through the left side wall of the movable frame 805 and the movable block 811 in sequence. The right side of the conveying screw 807 is rotatably connected to the right inner wall of the movable frame 805. The conveying screw 807 is threadedly connected to the movable block 811. A conveying limit rod 808 is fixedly connected to the inner left side of the movable frame 805. The right side of the conveying limit rod 808 passes through the movable block 811 and is fixedly connected to the inner right side of the movable frame 805. A limit tube 812 is fixedly connected to the upper end of the movable block 811. A connecting hole 810 is provided on the upper side wall of the conveying outer box 801. Contact sensor 1 809 and contact sensor 2 813 are fixedly connected to the rear inner wall of the conveying outer box 801. The rear end of the moving block 811 extends between contact sensor 1 809 and contact sensor 2 813. A discharge hole 803 is opened on the upper side wall of the conveying outer box 801. A baffle brush 804 is provided inside the discharge hole 803. Several inner clamping elastic plates 816 are symmetrically fixedly connected to the front and rear sides of the inner side wall of the limiting tube 812. The end of the inner clamping elastic plate 816 away from the side wall of the limiting tube 812 is inclined downward. When the left side end of the moving block 811 contacts contact sensor 1 809, the limiting tube 812 returns to the bottom of the connecting hole 1 810, which facilitates the next complete operation cycle. Two push holes 817 are provided on the side wall of the limiting tube 812. The lower ends of the two push holes 817 are open and they are symmetrically arranged in the left and right directions. A fixing plate 814 is provided on the right side of the limiting tube 812. The front and rear ends of the fixing plate 814 are fixedly connected to the front and rear inner walls of the conveying outer box 801, respectively. A passive push plate 815 is fixedly connected to the left end of the fixing plate 814. The passive push plate 815 has a triangular structure and is located directly below the discharge hole 803. When the collecting tube enters the limiting tube 812, the conveying is started. Motor 806 drives conveyor screw 807 to rotate, driving moving block 811 and limit tube 812 to move to the right. When moving block 811 reaches below the discharge port, the left end of passive push plate 815 is inserted into the push hole 817 of limit tube 812. As moving block 811 continues to move to the right, collection tube slides upward along the inclined surface of passive push plate 815. When the right end of moving block 811 contacts contact sensor 813, conveyor motor 806 stops. The upper end of collection tube passes through discharge hole 803 and extends above conveyor outer box 801, making it easy for egg collection technicians to pick up directly.

[0022] Example 2: Please refer to Figure 6 - Figure 12As shown, based on Embodiment 1, the present invention provides a technical solution: the switching mechanism 9 includes a switching outer frame 901 fixed to the upper end of the conveying outer box 801, an observation window 904 is provided at the front end of the switching outer frame 901, and the status of the collection tube inside the switching outer frame 901 can be easily observed through the observation window 904. A second connecting hole 921 is provided on the lower side wall of the switching outer frame 901, and the second connecting hole 921 is coaxially arranged with the first connecting hole 810. The switching mechanism 9 also includes two auxiliary frames 905 symmetrically arranged inside the switching outer frame 901. Each of the two auxiliary frames 905 has an extension hole 913 on its longitudinal sidewall. An auxiliary support plate 909 is fixedly connected to the ends of the longitudinal sidewalls of the two auxiliary frames 905 that are furthest from each other. A push belt 910 is arranged above the auxiliary support plate 909. Several push levers 911 are fixedly connected to the outer sidewall of the push belt 910. The ends of the push levers 911 furthest from the push belt 910 pass through the extension holes 913 and extend to the position between the two auxiliary frames 905. Two rotating shafts 9 are arranged at the upper end of the auxiliary support plate 909. 12. A drive motor 908 is provided below the auxiliary frame 905. The output end of the drive motor 908 is connected to one of the rotating shafts 912. During the feeding operation, the drive motor 908 drives the rotating shaft 912 to rotate, which in turn drives the push belt 910 to rotate. Then, the push plate 911 drives the collection tube to move to the right. At the same time, after the egg retrieval operation is completed, under the action of the drive motor 908, the push plate 911 can push the collection tube after egg retrieval into the space between the two limiting plates 917, and at the same time move the next collection tube that has not undergone egg retrieval operation to the area directly below the abutment cylinder 927. A curved abutment plate 916 is provided on the right side of the pusher belt 910. The right ends of the two curved abutment plates 916 are bent towards each other. The left ends of the upper and lower side walls of the curved abutment plates 916 are rotatably connected to the upper and lower inner walls of the extension hole 913, respectively. A connecting spring 915 is fixedly connected to the ends of the two curved abutment plates 916 that are away from each other. A pressure detection sensor 914 is fixedly connected to the end of the connecting spring 915 that is away from the curved abutment plate 916. The pressure detection sensor 914 is fixed on the inner side wall of the switching outer frame 901. Limiting side plates 907 are fixedly connected to the adjacent side walls of the two auxiliary frames 905. A bottom support frame 906 is provided between the two auxiliary frames 905. The front and rear outer walls of the bottom support frame 906 are fixedly connected to the adjacent side walls of the two auxiliary frames 905, respectively. The extension hole 913 is located at... Between the limiting side plate 907 and the bottom support frame 906, a pushing mechanism is provided on the right side of the bottom support frame 906. During use, several collection tubes are set between the two auxiliary frames 905, so that multiple collection operations can be performed according to the usage requirements. The two limiting side plates 907, the bottom support frame 906 and the pushing plate 911 work together to limit the collection tubes. When the rightmost collection tube moves between the two abutting arc plates 916, the right ends of the two abutting arc plates 916 are pushed to flip in a direction away from each other. The abutting arc plates 916 apply force to the pressure detection sensor 914 through the connecting spring 915. When the pressure detection sensor 914 detects that the pressure reaches the set value, the drive motor 908 stops. At this time, the rightmost collection tube is precisely located below the abutting cylinder 927, and the sealing door 903 is closed to complete the feeding. An electric push rod 919 is fixedly connected to the upper end of the switching frame 901. The output end of the electric push rod 919 passes through the upper side wall of the switching frame 901 and is fixedly connected to a lifting plate 926. A contact cylinder 927 is provided below the lifting plate 926. A through hole 1 931 and a through hole 2 932 are provided on the upper side wall of the contact cylinder 927. A negative pressure insertion tube 933 and a delivery tube 934 are provided at the lower end of the lifting plate 926. The negative pressure insertion tube 933 and the delivery tube 934 are located above the through hole 1 931 and the through hole 2 932, respectively. The negative pressure insertion tube 933 is connected to the negative pressure device 10. A delivery tube 11 is connected to the delivery tube 934. The end of the delivery tube 11 away from the delivery tube 934 is connected to the egg retrieval needle 12. At least two sliding rods 928 are fixedly connected to the upper end of the contact cylinder 927. The upper end of the sliding rod 928 passes through the lifting plate 926 and is fixedly connected to the upper top plate 930. A retaining spring 929 is sleeved on the sliding rod 928. The upper and lower ends of the retaining spring 929 are fixedly connected to the adjacent side walls of the lifting plate 926 and the retaining cylinder 927, respectively. During data collection, the connecting electric push rod 919 is activated. The output end of the connecting electric push rod 919 pushes the lifting plate 926 and the retaining cylinder 927 below to move downward. The retaining cylinder 927 first abuts against the upper end cap of the collection tube. As the connecting electric push rod 919 continues to advance, the lifting plate 926 compresses the retaining spring 929 and drives the negative pressure insertion tube 933 and the delivery insertion tube 934 to move downward synchronously. The negative pressure insertion tube 933 and the delivery insertion tube 934 pass through the through hole 1 931 and the through hole 2 932 on the retaining cylinder 927, respectively, and are accurately inserted into the collection tube. When the electric push rod 919 is pushed to the preset position, the indicator light at the oocyte retrieval needle 12 illuminates. The operator presses the oocyte retrieval start button to activate the negative pressure device 10. Negative pressure is applied to the collection tube through the oocyte retrieval needle 12 and the negative pressure cannula 933. Follicular fluid is collected through the oocyte retrieval needle 12 and then transported into the collection tube through the delivery tube 11 and the delivery cannula 934. After collection, the operator releases the operation button to turn off the negative pressure device 10. The electric push rod 919 moves the negative pressure cannula 933, the delivery cannula 934, and the contact cylinder 927 upwards to reset, thus detaching the negative pressure cannula 933 and the delivery cannula 934 from the collection tube. The pushing mechanism includes a pushing motor 920 fixed to the upper end of the switching outer frame 901, a pushing frame 922, two limiting slide rods 923 fixed to the upper inner wall of the switching outer frame 901, and two limiting plates 917. The output end of the pushing motor 920 passes through the switching outer frame 901 and is fixedly connected to a pushing screw 924. The lower end of the pushing screw 924 passes through the pushing frame 922 and is rotatably connected to the lower inner wall of the switching outer frame 901. The lower end of the limiting slide rod 923 passes through the pushing frame 922 and is fixedly connected to the lower inner wall of the switching outer frame 901. A pushing column 925 is fixedly connected to the left end of the pushing frame 922. The pushing column 925 is located directly above the second connecting hole 921. The left end of the limiting plate 917 is fixedly connected to the right end of the longitudinal side wall of the auxiliary frame 905. The lower ends of both the front and rear limiting plates 917 are hinged to a bearing plate 9. 18. A torsion spring is provided at the hinge of the bearing plate 918 and the limiting plate 917. The position of the bearing plate 918 is lower than the bottom support frame 906. After the collection is completed, the drive motor 908 pushes the collection tube to the right. After the egg retrieval is completed, the collection tube is located in the two abutting arc plates 916. The push motor 920 drives the push screw 924 to rotate. With the guidance of the limiting slide rod 923, the push frame 922 and the push column 925 are pushed to move downward. The push column 925 presses the collection tube to move downward. The bearing plates 918 on both sides are flipped outward under pressure. The collection tube passes through the second connecting hole 921 and the first connecting hole 810 in sequence and falls into the limiting tube 812 of the conveying mechanism 8. After the push column 925 pushes the collection tube completely into the outer conveying box 801, it resets upward with the push frame 922. The right ends of the two limiting plates 917 are not connected. The connection between the pusher 922 and the pusher column 925 is located directly above the gap between the right ends of the two limiting plates 917. When the collection tube that has completed egg retrieval moves to the limiting tube 812, the pusher 922 passes through the gap between the two limiting plates 917, ensuring that the pusher column 925 can completely push the collection tube to the inside of the outer transport box 801.

[0023] Working principle: Before use, the position of the conveying mechanism 8 is adjusted by the lifting adjustment mechanism to adapt to the egg collection scenario. Specifically, the internal threaded adjusting cylinder 5 on the base 1 is rotated, and its threaded engagement with the adjusting threaded rod 4 drives the lifting frame 3 and the upper conveying mechanism 8 and switching mechanism 9 to rise and fall as a whole. At the same time, the lifting limit column 6 slides along the limit cylinder 7 to achieve guide limit, ensuring smooth and accurate adjustment. Finally, the right end of the conveying outer box 801 extends to the position of the egg collection and sampling window to meet the needs of subsequent collection tube transmission and technician retrieval. During the loading stage, the sealing door 903 of the switching outer frame 901 is opened, and the collection tube is placed into the switching mechanism 9 through the discharge hole 902. The bottom of the collection tube abuts against the bottom support frame 906, and the end cap is placed above the front and rear limit side plates 907. The drive motor 908 is started, and the motor output drives the rotating shaft 912 to rotate, which in turn drives the push belt 910 to rotate. The push plate 911 on the outside of the push belt 910 rotates synchronously, conveying the placed collection tubes one by one to the right between the two abutting arc plates 916. After the collection tube contacts the abutting arc plate 916, it pushes the right ends of the two abutting arc plates 916 to flip away from each other. The abutting arc plate 916 applies force to the pressure detection sensor 914 through the connecting spring 915. When the pressure detection sensor 914 detects that the pressure reaches the set value, the drive motor 908 stops. At this time, the rightmost collection tube is precisely located directly below the abutting cylinder 927, and the sealing door 903 is closed to complete the feeding. During collection, the connecting electric push rod 919 is started. The output end of the connecting electric push rod 919 pushes the lifting plate 926 and the lower abutting cylinder 927 to move downward. The abutting cylinder 927 first abuts against the upper end cap of the collection tube. As the connecting electric push rod 919 continues to advance, the lifting plate 926 compresses the abutting spring 929 and drives the negative pressure insertion tube 933 and the conveying insertion tube 934 to move downward synchronously. The negative pressure insertion tube 933 and the conveying insertion tube 934 pass through the through hole 1 931 and through hole 2 932 on the abutting cylinder 927, respectively, and are precisely inserted into the collection tube. When the electric push rod 919 is pushed to the preset position, the indicator light at the egg retrieval needle 12 illuminates. The operator presses the egg retrieval start button to activate the negative pressure device 10. Negative pressure is applied to the collection tube through the egg retrieval needle 12 and the negative pressure cannula 933. Follicular fluid is collected through the egg retrieval needle 12 and then enters the collection tube through the delivery tube 11 and the delivery cannula 934. After collection, the operator releases the operation button to turn off the negative pressure device 10. The electric push rod 919 moves the negative pressure cannula 933, the delivery cannula 934, and the contact cylinder 927 upwards to reset, thus detaching the negative pressure cannula 933 and the delivery cannula 934 from the collection tube.

[0024] In the post-collection transmission stage, the drive motor 908 is restarted, and the push belt 910 drives the push plate 911 to continue conveying the collected tube to the right. When the collected tube enters between the two limit plates 917, the support plate 918 provides stable support under the action of the torsion spring. At the same time, the push motor 920 is started, which drives the push screw 924 to rotate. With the guidance of the limit slide rod 923, the push frame 922 and the push column 925 are pushed downward. The push column 925 presses the collected tube to move downward. The support plates 918 on both sides flip outward under pressure. The collected tube passes through the second connecting hole 921 and the first connecting hole 810 in sequence and falls into the limit tube 812 of the conveying mechanism 8. After the push column 925 pushes the collected tube completely into the outer conveying box 801, it returns to its original position upward with the push frame 922. The conveyor motor 806 is then started, driving the conveyor screw 807 to rotate and moving the moving block 811 and the limiting tube 812 to the right. When the moving block 811 reaches below the discharge port, the left end of the passive push plate 815 inserts into the push hole 817 of the limiting tube 812. As the moving block 811 continues to move to the right, the collection tube slides upward along the inclined surface of the passive push plate 815. When the right end of the moving block 811 contacts the second contact sensor 813, the conveyor motor 806 stops. The upper end of the collection tube passes through the discharge hole 803 and extends above the outer conveyor box 801, making it easy for the egg-collecting technician to pick it up directly. After egg retrieval is completed, the conveyor motor 806 reverses its rotation, driving the moving block 811 and the limiting tube 812 to reset to the left. When the left end of the moving block 811 contacts the first contact sensor 809, the motor stops, and the limiting tube 812 returns to directly below the first connecting hole 810, waiting to receive the next collection tube, completing one complete operation cycle.

[0025] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A semi-automatic follicular fluid collection device, comprising a base (1), characterized in that: Support legs (2) are provided at the four corners of the lower surface of the base (1). A lifting frame (3) is provided above the base (1). A conveying mechanism (8) is provided at the upper end of the lifting frame (3). A switching mechanism (9) is provided above the conveying mechanism (8). A lifting adjustment mechanism is provided between the lifting frame (3) and the base (1). An egg retrieval needle (12) is provided on the outside of the switching mechanism (9). A negative pressure device (10) is provided on the base (1). The lifting adjustment mechanism includes an internal threaded adjusting cylinder (5) and two limiting cylinders (7). The two limiting cylinders (7) are symmetrically connected to the top of the base (1). The internal threaded adjusting cylinder (5) is rotatably connected to the base (1). A lifting limiting column (6) is slidably connected inside the limiting cylinder (7). The upper end of the lifting limiting column (6) is fixedly connected to the lower end of the lifting frame (3). An adjusting threaded rod (4) is internally threaded connected to the internal threaded adjusting cylinder (5). The upper end of the adjusting threaded rod (4) is fixedly connected to the lower end of the lifting frame (3). The conveying mechanism (8) includes a conveying outer box (801), an adjustment control module (802) is provided at the front end of the conveying outer box (801), a movable frame (805) is fixedly connected to the inner wall of the rear side of the conveying outer box (801), a movable block (811) is provided inside the movable frame (805), a conveying motor (806) is fixedly connected to the left side of the movable frame (805), a conveying screw (807) is fixedly connected to the output end of the conveying motor (806), and the right side of the conveying screw (807) passes through the left side wall of the movable frame (805) and the movable block (811) in sequence. The moving block (811) has its right end of the conveying screw (807) rotatably connected to the right inner wall of the moving frame (805). The conveying screw (807) is threadedly connected to the moving block (811). A conveying limit rod (808) is fixedly connected to the left inner wall of the moving frame (805). The right end of the conveying limit rod (808) passes through the moving block (811) and is fixedly connected to the right inner wall of the moving frame (805). A limit tube (812) is fixedly connected to the upper end of the moving block (811). A connecting hole (810) is opened on the upper side wall of the conveying outer box (801). The switching mechanism (9) includes a switching outer frame (901) fixed to the upper end of the conveying outer box (801). An observation window (904) is provided on the front end of the switching outer frame (901). A second connecting hole (921) is provided on the lower side wall of the switching outer frame (901). The second connecting hole (921) is coaxially arranged with the first connecting hole (810). Contact sensor one (809) and contact sensor two (813) are fixedly connected to the inner rear wall of the conveying outer box (801). The rear end of the moving block (811) extends between contact sensor one (809) and contact sensor two (813). A discharge hole (803) is opened on the upper side wall of the conveying outer box (801). A baffle brush (804) is provided inside the discharge hole (803). Several inner clamping elastic plates (816) are symmetrically fixedly connected to the front and rear sides of the inner side wall of the limiting tube (812). The end of the inner clamping elastic plate (816) away from the side wall of the limiting tube (812) is inclined downward. Two push holes (817) are provided on the side wall of the limiting tube (812). The two push holes (817) are open at the lower end and are symmetrically arranged in the left and right directions. A fixing plate (814) is provided on the right side of the limiting tube (812). The front and rear ends of the fixing plate (814) are fixedly connected to the front and rear inner walls of the conveying outer box (801) respectively. A passive push plate (815) is fixedly connected to the left end of the fixing plate (814). The passive push plate (815) has a triangular structure and is located directly below the discharge hole (803). The switching mechanism (9) further includes two auxiliary frames (905) symmetrically arranged inside the switching outer frame (901). Each of the two auxiliary frames (905) has an extension hole (913) on its longitudinal sidewall. Each of the two auxiliary frames (905) has an auxiliary support plate (909) fixedly connected to the opposite end of its longitudinal sidewall. A push belt (910) is provided above the auxiliary support plate (909). Several push plates (911) are fixedly connected to the outer sidewall of the push belt (910). The end of the push plate (911) away from the push belt (910) passes through the extension hole (913) and extends to the position between the two auxiliary frames (905). Two rotating shafts (912) are provided at the upper end of the auxiliary support plate (909). A drive motor (908) is provided below the auxiliary frame (905). The output end of the drive motor (908) is connected to one of the rotating shafts (912) in a transmission connection. A contact arc plate (916) is provided on the right side of the pusher belt (910). The right ends of the two contact arc plates (916) are bent toward each other. The left ends of the upper and lower side walls of the contact arc plates (916) are rotatably connected to the upper and lower side inner walls of the extension hole (913), respectively. A connecting spring (915) is fixedly connected to the ends of the two contact arc plates (916) that are away from each other. A pressure detection sensor (914) is fixedly connected to the end of the connecting spring (915) that is away from the contact arc plate (916). The pressure... The detection sensor (914) is fixed on the inner side wall of the switching frame (901). The adjacent side walls of the two auxiliary frames (905) are fixedly connected to the limiting side plates (907). A bottom support frame (906) is provided between the two auxiliary frames (905). The front and rear outer walls of the bottom support frame (906) are fixedly connected to the adjacent side walls of the front and rear auxiliary frames (905) respectively. The extension hole (913) is located between the limiting side plate (907) and the bottom support frame (906). A pushing mechanism is provided on the right side of the bottom support frame (906). The upper end of the switching frame (901) is fixedly connected to a connecting electric push rod (919). The output end of the connecting electric push rod (919) passes through the upper side wall of the switching frame (901) and is fixedly connected to a lifting plate (926). A contact cylinder (927) is provided below the lifting plate (926). The upper side wall of the contact cylinder (927) is provided with a through hole one (931) and a through hole two (932). The lower end of the lifting plate (926) is provided with a negative pressure insertion tube (933) and a delivery insertion tube (934). The negative pressure insertion tube (933) and the delivery insertion tube (934) are respectively located above the through hole one (931) and the through hole two (932). In this configuration, the negative pressure cannula (933) is connected to the negative pressure device (10), and the delivery cannula (934) is connected to the delivery pipe (11). The end of the delivery pipe (11) away from the delivery cannula (934) is connected to the egg retrieval needle (12). The upper end of the abutment cylinder (927) is fixedly connected to at least two sliding rods (928). The upper end of the sliding rod (928) passes through the lifting plate (926) and is fixedly connected to the top plate (930). The sliding rod (928) is fitted with an abutment spring (929). The upper and lower ends of the abutment spring (929) are fixedly connected to the adjacent side walls of the lifting plate (926) and the abutment cylinder (927), respectively. The pushing mechanism includes a pushing motor (920) fixed to the upper end of the switching outer frame (901), a pushing frame (922), two limiting slide rods (923) fixed to the upper inner wall of the switching outer frame (901), and two limiting plates (917). The output end of the pushing motor (920) passes through the switching outer frame (901) and is fixedly connected to a pushing screw (924). The lower end of the pushing screw (924) passes through the pushing frame (922) and is rotatably connected to the lower inner wall of the switching outer frame (901). The lower end of the limiting slide rod (923) passes through the pushing frame (922) and is rotatably connected to the lower inner wall of the switching outer frame (901). The lower inner wall of the switching frame (901) is fixedly connected, and the left end of the pusher frame (922) is fixedly connected to the pusher column (925). The pusher column (925) is located directly above the second connecting hole (921). The left end of the limiting plate (917) is fixedly connected to the right end of the longitudinal side wall of the auxiliary frame (905). The lower ends of the front and rear limiting plates (917) are hinged to the bearing plate (918). A torsion spring is provided at the hinge of the bearing plate (918) and the limiting plate (917). The position of the bearing plate (918) is lower than the bottom support frame (906).

2. The semi-automatic follicular fluid collection device according to claim 1, characterized in that: The right ends of the two limiting plates (917) are not connected, and the connection between the pusher (922) and the pusher column (925) is located directly above the gap between the right ends of the two limiting plates (917).

3. The semi-automatic follicular fluid collection device according to claim 1, characterized in that: An indicator light and an egg retrieval start button are provided at the position of the egg retrieval needle (12). The indicator light is used to indicate that the negative pressure cannula (933) and the delivery cannula (934) are fully inserted into the collection tube. The egg retrieval start button is used to control the negative pressure device (10).

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