A pull-out type collection device for cervical secretions of female livestock

Abstract

The present invention discloses a pull-out type collection device for cervix secretions of female livestock, which comprises an outer tube and a foaming head; the foaming head is fixedly connected to one end of the outer tube, and two circles of anti-overflow rings are arranged on the surface of the foaming head. The outer tube is slidably fitted with an inner tube with a matching size, and the inner tube is slidably fitted with a collector with a matching size. A pull ring is arranged at one end of the collector away from the foaming head, and a brush is arranged at the other end of the collector. The brush can be slidably fitted in the inner tube to quickly and conveniently collect secretion samples. By the combined use of the outer tube, the inner tube and the collector, a disposable device is used to safely and aseptically insert into the cervix uteri, and a pull-out type collector is used to obtain cervix secretions. Moreover, it is simple and easy to operate, without the need for fixation, safe for humans and livestock, and can quickly, simply and safely obtain cervix secretions for detecting endometritis. The setting of the resistance mechanism can remind the staff that the insertion size of the inner tube is appropriate, avoiding improper operation and excessive insertion, which may cause damage to female livestock.

Description

Technical Field

[0001] The present invention relates to the technical field of female livestock reproduction, and specifically to a pull-type collection device for female livestock cervical secretions. Background Art

[0002] In breeding production, compared with male livestock, the reproductive systems of female livestock come into contact with humans more often. For example, operations such as artificial insemination, artificial midwifery, and uterine irrigation all require touching or even invading the reproductive system. Therefore, female livestock reproductive system diseases are relatively more common, among which endometritis is more common, accounting for about 50% of female livestock reproductive disorder diseases. Quickly, simply, and accurately diagnosing endometritis in female livestock is an urgent need in livestock production. So far, cervical secretions can be used as disease sample materials to relatively simply and accurately diagnose endometritis in female livestock.

[0003] Currently, there are the following problems in collecting cervical secretions from female livestock:

[0004] 1. Limited by the special structure of the female livestock cervix, the cervix of female livestock only slightly opens during estrus or parturition, making it difficult to collect.

[0005] 2. The traditional method is to use a speculum to dilate the vagina after fixation and collect cervical fluid with a swab, which has problems such as strong professional operation not being easy to promote, small collection volume, and easy sample contamination.

[0006] 3. Female livestock do not cooperate and strongly resist the collection operation. Pigs, horses, cows, and sheep are large in size and not easy to fix.

[0007] 4. Improper disinfection of instruments easily leads to cross-infection.

[0008] 5. There is no special collection instrument with a suitable structure and length, and it is impossible to quickly and simply obtain cervical secretions for detection.

[0009] Chinese Patent Publication No.: 202120841746.0 discloses a collection device for bovine vaginal secretions, which includes a main cylinder body. Along its axial direction, a storage hole A and a storage hole B are respectively opened at the top and bottom ends. A sleeve extending along the axial direction of the main cylinder body and spaced from the storage hole B is provided in the storage hole A, so that a receiving cavity is formed between the outer wall of the sleeve and the inner wall of the main cylinder body. At the top, two sliding groove holes are respectively provided on both sides of the sleeve; two sealing plate units are spliced and accommodated in the gap between the bottom end and the sleeve; two sliding rods are respectively slidably arranged in the two sliding groove holes, and one end of each of them is connected to the two sealing plate units, and the other end extends out of the sliding groove holes. By controlling the sliding rods, the two sealing plate units can block and open the storage hole B; a pull rod is inserted axially into the inner cavity of the sleeve until it passes through the storage hole B, and a collection swab is connected to the pull rod.

[0010] During the actual use of the above-mentioned collection device, after the collection is completed, the pull rod is first pulled outwards, and then the main cylinder is pulled out from the bovine vagina, which easily causes the collected sample to be contaminated by external impurities due to the operating scenario.

[0011] Therefore, it is necessary to provide a pull-type cervical secretion collection device for female livestock to solve the above technical problems. Summary of the Invention

[0012] The purpose of the present invention is to provide a pull-type cervical secretion collection device for female livestock to solve the problem that the collected sample is easily contaminated by external impurities due to the operating scenario as mentioned in the above background technology.

[0013] To achieve the above purpose, the present invention provides the following technical solution: A pull-type cervical secretion collection device for female livestock, including an outer tube and a foaming head; the foaming head is fixedly connected to one end of the outer tube, and two circles of anti-overflow rings are arranged on the surface of the foaming head. The outer tube is slidably fitted with an inner tube with a matching size, and a collector with a matching size is slidably fitted inside the inner tube. A pull ring is arranged at one end of the collector away from the foaming head, and a brush is arranged at the other end of the collector. The brush can be slidably fitted inside the inner tube to quickly and conveniently collect the secretion sample.

[0014] As a further solution of the present invention: A disc is sleeved and fixed at one end of the outer tube away from the foaming head. The disc is a hollow structure, and a pressing disc with a size matching the inner wall of the disc is slidably arranged inside the disc. The pressing disc is a circular ring structure. A C-shaped rod is slidably embedded in the inner side wall of the outer tube. On one side of the disc away from the foaming head, a buckle is symmetrically arranged. The buckle can limit the position of the C-shaped rod when the C-shaped rod is in contact with the disc. One end of the C-shaped rod located outside the outer tube penetrates the side wall of the disc and is fixedly connected to the pressing disc. A first spring is arranged between the pressing disc and the disc. The first spring is sleeved on a section of the C-shaped rod extending into the disc. The end of the C-shaped rod extending into the outer tube is rotatably connected with a movable part.

[0015] As a further solution of the present invention: A connecting channel is opened in the side wall of the outer tube. An anti-detachment ring is fixedly connected to the foaming head in the middle of the anti-overflow ring. The anti-detachment ring is communicated with the disc through the connecting channel. A resistance mechanism is arranged in the side wall of the outer tube at one end away from the disc. When the inner tube is inserted to a suitable size, the resistance mechanism is triggered to prevent the inner tube from being inserted too much.

[0016] As a further solution of the present invention: The anti-detachment ring is an inflatable airbag structure, and the C-shaped rod is a three-section structure. The first section structure is a cylinder of the C-shaped rod away from the outer tube and fixedly connected to the pressing disc. The second section structure is a cuboid slidably embedded in the inner side wall of the outer tube. The third section structure is a cross bar connecting the cylinder and the cuboid.

[0017] As a further solution of the present invention: The collector is threadedly connected to the pull ring, and a clamping mechanism is provided at one end of the collector away from the pull ring. The brush is connected to the collector through the clamping mechanism.

[0018] As a further solution of the present invention: A pull rope is slidably embedded in the center of the collector. One end of the pull rope away from the brush is fixedly connected to the end of the pull ring, and the other end of the pull rope is fixedly connected to the clamping mechanism. A limiting groove is opened at one end of the brush close to the collector.

[0019] As a further solution of the present invention: The clamping mechanism includes a concave block, a limiting rod and a fixing rod; One end of the pull rope away from the pull ring is fixedly connected to the end of the concave block. The concave block is embedded in one end of the collector close to the brush and can slide. The limiting rod is arranged on the collector between the concave block and the brush and can rotate by a certain angle. One end of the fixing rod away from the brush is fixedly connected to the center position of the convex block, and one end of the fixing rod away from the concave block extends into the limiting groove.

[0020] As a further solution of the present invention: The center of the concave block is provided with a frustum-shaped groove, and the fixing rod is in a shape similar to a screw, so that when the fixing rod is away from the limiting groove, the limiting rod can be rotated to release the limitation on the limiting groove.

[0021] As a further solution of the present invention: The resistance mechanism includes a resistance block, a connecting rod and a trapezoidal slider; The resistance block is slidably embedded in one end of the outer tube away from the disc. A second spring is arranged between the side wall of the resistance block close to the foaming head and the outer tube. The connecting rod is slidably embedded in the side wall of the outer tube. The two end parts of the connecting rod close to the inner tube extend into the circular grooves opened at the end part of the resistance block. The circular grooves are located on the opposite side surfaces of the two groups of resistance blocks, so that the connecting rod limits the position of the resistance ring. One end of the trapezoidal slider away from the inner tube is fixedly connected to the center of the connecting rod.

[0022] As a further solution of the present invention: One end of the trapezoidal slider away from the connecting rod penetrates through the side wall of the outer tube and extends into the tube of the outer tube. The length of the trapezoidal slider extending out of the inner wall of the outer tube is greater than the length of the two end parts of the connecting rod extending into the resistance block.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows: By the combined use of the outer tube, the inner tube and the collector, a disposable device is safely and aseptically inserted into the cervix. The pull-type collector is used to obtain cervical secretions, and it is simple and easy to operate, without the need for fixation. It is safe for humans and animals, and can quickly, simply and safely obtain cervical secretions for detecting endometritis. The anti-disengagement ring is arranged so that when the inner tube is inserted, through the cooperation of the C-shaped rod, the extrusion disc and the disc, gas fills the anti-disengagement ring through the connecting channel, making the anti-disengagement ring fully contact with the cervical structure of the female livestock, so that when the inner tube and the collector are inserted, the outer tube will not move. The resistance mechanism can remind the staff that the insertion size of the inner tube is appropriate, avoiding excessive insertion due to improper operation and causing damage to the female livestock. The clamping mechanism facilitates the collection of the brush by the personnel, without the need for manual cutting of the brush by the personnel, avoiding the secretion on the brush splashing onto the skin of the personnel and causing damage, thus achieving simple, safe and rapid sample collection. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a front three-dimensional structure schematic diagram of the present invention.

[0025] Figure 2 It is a front three-dimensional structure schematic diagram in the present invention.

[0026] Figure 3 It is a structure schematic diagram of the C-shaped rod after use in the present invention.

[0027] Figure 4 It is a structure schematic diagram of the C-shaped rod before use in the present invention.

[0028] Figure 5 It is a middle cross-sectional structure schematic diagram of the present invention.

[0029] Figure 6 It is a structure schematic diagram of the pull ring in the present invention.

[0030] Figure 7 It is a structure schematic diagram of the brush in the present invention.

[0031] Figure 8 It is a cross-sectional structure schematic diagram of the connecting channel in the present invention.

[0032] Figure 9 In the present invention Figure 8 The enlarged schematic diagram at A.

[0033] Figure 10 It is a structure schematic diagram of the clamping mechanism in the present invention.

[0034] Figure 11 It is a cross-sectional structure schematic diagram of the resistance mechanism in the present invention.

[0035] Figure 12This is a schematic structural diagram of the resistance mechanism in the present invention.

[0036] In the figure: 1. Outer tube; 2. Foaming head; 3. Inner tube; 4. Collector; 5. Brush; 6. Anti-overflow ring; 7. Pull ring; 8. Anti-disconnection ring; 9. Disc; 10. Snap; 11. C-shaped rod; 12. First spring; 13. Extrusion disc; 14. Movable block; 15. Connecting channel; 16. Second spring; 17. Resistance block; 18. Pull rope; 19. Third spring; 20. Concave block; 21. Limiting rod; 22. Fixed rod; 23. Limiting groove; 24. Connecting rod; 25. Trapezoidal slider. Detailed implementation manners

[0037] Please refer to Figure 1 , in an embodiment of the present invention, a pull-type female livestock cervical secretion collection device includes an outer tube 1 and a foaming head 2. The foaming head 2 is fixedly connected to one end of the outer tube 1. The foaming head plays a role in dilating the cervix and fixing the outer tube. Two circles of anti-overflow rings 6 are arranged on the surface of the foaming head, which are 4 - 10 mm higher than the surface to prevent the outflow of cervical secretions. The outer tube 1 is slidably fitted with an inner tube 3 with a matching size. The tail end of the inner tube 3 is marked with scales for the convenience of the staff's operation. A collector 4 with a matching size is slidably fitted inside the inner tube 3. A pull ring 7 is arranged at one end of the collector 4 away from the foaming head. The design of the pull ring 7 at the tail end of the collector 4 facilitates rotation, and the marked scales facilitate operation. A brush 5 is arranged at the other end of the collector 4. The brush 5 can be slidably fitted inside the inner tube 3 to quickly and conveniently collect secretion samples.

[0038] During specific use, taking sows as an example, the specific usage method is as follows:

[0039] S1. Select the sows to be inspected. There are two types of sows to be inspected: one is the sows showing estrus symptoms, and the other is the sows showing symptoms of purulent discharge from the vulva.

[0040] S2. The sows to be inspected do not need to be fixed. Just drive them into the positioning pen. Sows have strong adaptability.

[0041] S3. Cleaning: Use clean water to wash away the feces, forage and other foreign matters on the hindquarters and tail of the sows, and dry the water with absorbent paper.

[0042] S4. Disinfection: Disinfect the vulva of the sows with 0.03% potassium permanganate solution, and dry the water with absorbent paper.

[0043] S5. Insert the outer tube 1: Open the front end of the outer tube 1 package, apply lubricant on the foaming head 2. First, insert it into the vagina at a 45° upward angle for 10 cm, then rotate the outer tube 1 counterclockwise and insert the outer tube 1 horizontally through the cervix. After feeling the resistance, insert it about 5 cm more, and pull it backward slightly with a little force until the outer tube 1 cannot be pulled out; Preferably, the outer tube 1 is designed to be made of high-quality PP material, and the expanding foaming head 2 is made of TPE / XPE / EVA or medical silicone material, which is safe, non-toxic, smooth and does not damage the reproductive tract;

[0044] S6. Insert the inner tube 3: Open the front end of the inner tube 3 package and insert the inner tube 3 into the outer tube 1. At the same time, observe the scale at the tail of the inner tube 3. The insertion depth should reach 500 mm and be flush with the tail of the outer tube 1; Preferably, the inner tube 3 is designed to be made of high-quality PP material. When in use, insert the pull-out collector 4. Because when the collection device is pulled out, if there is a lot of secretion, it is easy to drip and pollute the surrounding environment. And with the inner tube 3, after collection, the excess secretion on the brush 5 can first drip into the inner tube 3 for accommodation. Then when the brush 5 is collected for detection, the inner tube 3 can play a role in storing cervical secretions;

[0045] S7. Insert the pull-out collector 4: Open the front end of the package and insert the pull-out collector 4 into the inner tube 3. At the same time, observe the scale at the tail, and the insertion depth should reach 500 mm and be flush with the tail of the outer tube 1;

[0046] S8. Slowly push the collector 4 in by 50 mm, rotate it 3 times to make the bristles of the brush 5 at the front end fully contact the cervix wall, then pull it back to the original position, insert the inner tube 3 by 50 mm, rotate it 3 times again and then slowly withdraw it to the 500 mm position, and slowly withdraw it from the sow's body together with the outer tube 1; Preferably, the main body of the pull-out collector 4 is made of high-quality PP material, a pull ring 7 is designed at the tail end, and a brush 5 made of TPE or medical silicone material is designed at the front end, and cervical secretions can be obtained by pulling;

[0047] S9. Insert the brush 5 at the front end of the collector 4 into a 5 ml disposable sterile centrifuge tube, quickly cut off the brush 5 and seal it, and record the ear number of the sow to be tested on the outer wall of the tube.

[0048] The above-mentioned device is of a combined design, individually packaged and sterilized, and is used in combination when needed. During actual use, when inserting the inner tube 3, if the position of the outer tube 1 is not limited, when the inner tube 3 and the collector 4 are inserted, the outer tube 1 is likely to continue to move deeper into the female livestock's body, causing the female livestock to show a resistant state, which affects the collection of secretions by the staff. In addition, although the inner tube 3 is marked with scales, if the staff does not pay attention to observing the scales or operates improperly when inserting, the inner tube 3 will be inserted too deep. Moreover, the brush 5 needs to be manually cut after collection. First, when the brush 5 is pushed out of the inner tube 3, due to the operating scenario, it is likely to be contaminated by external impurities, which easily contaminates the secretions collected on the brush 5, resulting in inaccurate test data. Then, when manually cutting the brush 5, if the operation is improper, the secretions on it are likely to splash onto the staff, causing harm to the staff.

[0049] To further improve the problems occurring in the above-mentioned embodiments, as Figures 2-4 shown, a disc 9 is sleeved and fixed at one end of the outer tube 1 away from the foaming head 2. The disc 9 is of a hollow structure. A pressing disc 13 adapted to the inner wall size of the disc 9 is slidably arranged in the disc 9. The pressing disc 13 is of an annular structure. A U-shaped rod 11 is slidably embedded in the inner side wall of the outer tube 1. On one side of the disc 9 away from the foaming head 2, buckles 10 are symmetrically arranged. The buckles 10 can limit the position of the U-shaped rod 11 when the U-shaped rod 11 is in contact with the disc 9. One end of the U-shaped rod 11 located outside the outer tube 1 penetrates the side wall of the disc 9 and is fixedly connected to the pressing disc 13. A first spring 12 is arranged between the pressing disc 13 and the disc 9. The first spring 12 is sleeved on a section of the U-shaped rod 11 extending into the disc 9. The end of the U-shaped rod 11 extending into the outer tube 1 is rotatably connected to a movable block 14. Before inserting the inner tube 3, the extending direction of the movable block 14 is perpendicular to the extending direction of 1. After inserting the inner tube 3, the extending direction of the movable block 14 is parallel to the extending direction of 1. A connecting channel 15 is opened in the side wall of the outer tube 1. A retaining ring 8 is fixedly connected to the foaming head 2 in the middle of the anti-overflow ring 6. The retaining ring 8 is communicated with the disc 9 through the connecting channel 15. A resistance mechanism is arranged in the side wall of the outer tube 1 away from the disc 9. When the inner tube 3 is inserted to an appropriate size, the resistance mechanism is triggered, thereby preventing the inner tube 3 from being inserted too deep.

[0050] Further, the retaining ring 8 is an inflatable airbag structure. The U-shaped rod 11 is of a three-section structure. The first section is a cylinder of the U-shaped rod 11 away from the outer tube 1 and fixedly connected to the pressing disc 13. The second section is a cuboid slidably embedded in the inner side wall of the outer tube 1. The third section is a crossbar connecting the cylinder and the cuboid. Referring to Figure 3 , a groove is opened at the position of the movable block 14 when the outer tube 1 is in a horizontal state.

[0051] During specific use, when the outer tube 1 is inserted completely and the inner tube 3 has not been inserted into the outer tube 1, referring to Figure 4 , under the action of the first spring 12, the pressing disc 13 fits against the inner wall of the disc 9 away from the foaming head 2, so that the crossbar of the U-shaped rod 11 does not fit against the disc 9, the end of the buckle 10 fits against the cylindrical side wall of the U-shaped rod 11, and the movable block 14 is perpendicular to the cuboid of the U-shaped rod 11. Since the end of the movable block 14 is flat and the position of the cylindrical end of the U-shaped rod 11 is relatively limited by the disc 9, and the cuboid of the U-shaped rod 11 is slidably embedded in the inner wall of the outer tube 1, the movable block 14 is in a state perpendicular to it; when inserting the inner tube 3, open the front end of the inner tube 3 package and insert the inner tube 3 into the outer tube 1, so that the end of the inner tube 3 contacts the movable block 14, and the operator continues to push the inner tube 3 forward, so that the movable block 14 is pushed forward and slides. The movement of the movable block 14 causes the U-shaped rod 11 to move towards the foaming head 2, so that the crossbar fits against the disc 9. At this time, the buckle 9 limits the position of the U-shaped rod 11. The movement of the U-shaped rod 11 pushes the pressing disc 13 towards the foaming head 2 through one end of the cylinder, and the first spring 12 is stretched. The pressing disc 13 conveys the air inside the disc 9 to the anti-detachment ring 8 through the connecting channel 15, so that the anti-detachment ring 8 is filled and inflated, fully adapting to the physiological structure in the body of the female livestock, so that the outer tube 1 is not prone to move when inserting the inner tube 3 and the collector 4. When the inner tube 3 is inserted into the appropriate position, the resistance mechanism will be triggered to remind the operator that the insertion position of the inner tube 3 is appropriate at this time. Subsequently, the collector 4 is inserted into the inner tube 3 to collect samples. After the collection is completed, the operator toggles the buckle 10 to both sides, so that the buckle 10 releases the limit on the U-shaped rod 11. Immediately, the first spring 12 resets, so that the pressing disc 14 and the U-shaped rod 11 reset. When the pressing disc 11 resets, the air in the anti-detachment ring 8 is drawn back into the disc 9 through the connecting channel 15, so that the anti-detachment ring 8 no longer limits the collection device, thus facilitating the operator to pull out the collection device. Since the movable block 14 is in a horizontal state at this time, when the U-shaped rod 11 resets, it will not affect the sliding reset, so as to quickly and conveniently collect samples.

[0052] As Figures 5-8 shown, a pull rope 18 is slidably embedded in the center of the collector 4. The collector 4 is threadedly connected to the pull ring 7. A clamping mechanism is arranged at one end of the collector 4 away from the pull ring 7. The brush 5 is connected to the collector 4 through the clamping mechanism. One end of the pull rope 18 away from the brush 5 is fixedly connected to the end of the pull ring 7, and the other end of the pull rope 18 is fixedly connected to the clamping mechanism. A limiting groove 23 is opened at one end of the brush 5 close to the collector 4.

[0053] During specific use, after the brush 5 completes the collection of the cervical secretions of the female livestock and the collection device is pulled out, the staff rotates the pull ring 7 to separate the pull ring 7 from the collector 4, and then pulls the pull ring 7 away from the collector 4, driving the pull rope 18 to move away from the collector 4, so that the clamping mechanism moves with the pull rope 18, thereby enabling the clamping mechanism to release the limit on the limit groove 23, and further making the position between the brush 5 and the collector 4 no longer limited. However, due to the soft texture of the bristles of the brush 5 itself and the large friction when the bristles are in full contact with the inner tube 3, it is necessary for the staff to push the collector 4 to push out the brush 5, and align the position of the brush 5 of the collection device with the mouth of a prepared 5 ml disposable sterile centrifuge tube. Push the collector 4 forward so that the end of the collector 4 pushes the brush 5 out of the inner tube 3. When the brush 5 leaves the inner tube 3, the brush 5 can fully bring out the secretion sample collected on the inner wall of the inner tube 3 and then fall off into the centrifuge tube, without the need for the staff to manually cut it, avoiding the secretion splashing on the staff and the brush 5 being exposed to the air, which affects the collected sample, thus achieving fast and safe sample collection.

[0054] As Figures 9-10 shown, the clamping mechanism includes a concave block 20, a limiting rod 21 and a fixing rod 22; one end of the pull rope 18 away from the pull ring 7 is fixedly connected to the end of the concave block 20, the concave block 20 is embedded in one end of the collector 4 close to the brush 5 and can slide, the limiting rod 21 is arranged on the collector 4 between the concave block 20 and the brush 5 and can rotate by a certain angle. When one end of the limiting rod 21 cooperates with the concave block 20, the other end of the limiting rod 21 cooperates with the limit groove 23 to limit the position of the brush 5. When one end of the limiting rod 21 does not cooperate with the concave block 20, the other end of the limiting rod 21 does not contact the limit groove 23 and releases the limit on the position of the brush 5. One end of the fixing rod 22 away from the brush 5 is fixedly connected to the center position of the convex block 20, and one end of the fixing rod 22 away from the concave block 20 extends into the limit groove 23. The center of the concave block 20 is provided with a frustum-shaped groove, and the fixing rod 22 is in a shape similar to a screw, so that when the fixing rod 22 moves away from the limit groove 23, the limiting rod 21 can be rotated to release the limit on the limit groove 23.

[0055] During specific use, when the brush 5 is assembled with the collector 4, the second spring 19 in its natural state pushes the concave block 20 close to the brush 5. One end of the limiting rod 21 away from the limiting groove 23 is engaged with the concave block 20, and the concave block 20 limits the rotation angle of the limiting rod 21. The other end of the limiting rod 21 extends into the limiting groove 23 and cooperates with the limiting groove 23 to limit the position of the brush 5. At this time, the limiting rod 21 is in an inclined state, and the top end of the fixed rod 22 extends into the limiting groove 23. When a person pulls the pull ring 7, the convex block 20 moves away from the brush 5 along with the pull ring 7 through the pull rope 18. The second spring 19 is stressed and contracts. One end of the limiting rod 21 away from the limiting groove 23 is separated from the concave block 20, and the concave block 20 releases the limitation on the rotation angle of the limiting rod 21. The fixed rod 22 moves away from the limiting groove 23 along with the concave block 20 and gradually contacts and slides with one end of the limiting rod 21 close to the concave block 20, causing the limiting rod 21 to rotate into a horizontal state. As a result, the end of the limiting rod 21 extending into the limiting groove 23 is separated from the limiting groove 23. At this time, the position limitation between the brush 5 and the collector 4 is released, facilitating the collection of the brush 5 by the staff.

[0056] As Figures 11-12 shown, the resistance mechanism includes a resistance block 17, a connecting rod 24, and a trapezoidal slider 25. The resistance block 17 is slidably embedded at one end of the outer tube 1 away from the disc 9. A second spring 16 is provided between the side wall of the resistance block 17 close to the foaming head 2 and the outer tube 1. The connecting rod 24 is slidably embedded in the side wall of the outer tube 1. Both end portions of the connecting rod 24 close to the inner tube 3 extend into a circular groove formed at the end of the resistance block 17. The circular groove is located on the opposite sides of the two groups of resistance blocks 17, enabling the connecting rod 24 to limit the position of the resistance ring 17. One end of the trapezoidal slider 25 away from the inner tube 3 is fixedly connected to the center of the connecting rod 24. One end of the trapezoidal slider 25 away from the connecting rod 24 penetrates the side wall of the outer tube 1 and extends into the tube of the outer tube 1. When the inner tube 3 is inserted, it can be squeezed by the inner tube 3 to move to both sides. The length of the trapezoidal slider 25 extending out of the inner wall of the outer tube 1 is greater than the length of both end portions of the connecting rod 24 extending into the resistance block 17.

[0057] During actual use, before the staff inserts the inner tube 3 into the outer tube 1, the second spring 16 is in a compressed state, the resistance block 17 is away from the side wall of the foam head 2 and is flush with the inner wall of the outer tube 1. The two end portions on both sides of the connecting rod 24 extend into the circular grooves on the resistance block 17 and limit the position of the resistance block 17. The trapezoidal slider 25 extends out of the inner wall of the outer tube 1, and the inclined surface corresponds to the direction of insertion of the inner tube 3. When the inner tube 3 is inserted, the end of the inner tube 3 will contact and slide against the trapezoidal slider 25, moving the trapezoidal slider 25 towards the foam head 2, causing the connecting rod 24 to move towards the foam head 2. As a result, the two end portions on both sides of the connecting rod 24 leave the circular grooves. Since the connecting rod 24 is slidably embedded in the side wall of the outer tube 1, and the length of the connecting rod 24 sliding towards the foam head 2 is exactly equal to the length of the trapezoidal slider 25 extending out of the inner wall of the outer tube 1, the connecting rod 24 releases the limit on the resistance block 17. At the same time, the second spring 16 resets and pushes the resistance block 17 to move towards the position of the inner tube 3, enabling the resistance block 17 to cooperate with the inner tube 3, so that the staff knows that it has been inserted to the appropriate position for the first time. Since the resistance mechanism is arranged at the outermost edge position of the end of the outer tube 1, at this time, the inserted end of the inner tube 3 is flush with the end of the outer tube 1 where the foam head 2 is provided. Taking sows as an example, when the staff inserts the inner tube 3 for the second time by 50 mm, the resistance block 17 will not affect the insertion operation, facilitating the operation and use by the staff.

[0058] Furthermore, since the resistance mechanism is arranged at the forefront position of the outer tube 1, when collecting cervical secretions from different female livestock, outer tubes 1 of different sizes need to be used (see Table 1 for details). When the inner tube 3 is inserted to a position flush with the forefront of the outer tube 1, the resistance mechanism can be triggered to remind the staff that the first insertion position has reached a position flush with the forefront of the outer tube 1, thus achieving rapid and simple acquisition of cervical secretions for detection. The inner tube 3 and the collector 4 can also adopt corresponding sizes and lengths, as shown in Table 2 and Table 3.

[0059] Table 1

[0060]

[0061] Table 1: Applicable specifications of outer tubes for various animals.

[0062] Table 2

[0063]

[0064] Table 2: Applicable specifications of inner tubes for various animals.

[0065] Table 3

[0066]

[0067]

[0068] Table 3: Applicable specifications of various pull-out collectors for animals.

[0069] The length of the brush 5 is 20 - 50 mm, the diameter is the same as that of the collector, the length of the bristles is 3 - 8 mm, and the number and density of the bristles can be set with reference to the number and density of the bristles on a toothbrush.

[0070] In summary, when dealing with different female livestock, using the corresponding-sized collection equipment can achieve rapid and convenient collection of samples of the cervical secretions of female livestock.

Claims

1. A pull - type cervical secretion collection device for female livestock, comprising an outer tube and a foaming head; It is characterized in that the foaming head is fixedly connected to one end of the outer tube, and two circles of anti - overflow rings are arranged on the surface of the foaming head. The outer tube is slidably fitted with an inner tube of a suitable size, and a collector of a suitable size is slidably fitted inside the inner tube. A pull ring is arranged at one end of the collector away from the foaming head, and a brush is arranged at the other end of the collector. The brush can be slidably fitted inside the inner tube to quickly and conveniently collect secretion samples; A disc is sleeved and fixed at the end of the outer tube away from the foaming head. The disc is a hollow structure, and a pressing disc adapted to the inner wall size of the disc is slidably arranged inside the disc. The pressing disc is an annular structure. A U - shaped rod is slidably embedded in the inner side wall of the outer tube. On the side of the disc away from the foaming head, buckles are symmetrically arranged. The buckles can limit the position of the U - shaped rod when the U - shaped rod is in contact with the disc. One end of the U - shaped rod located outside the outer tube penetrates the side wall of the disc and is fixedly connected to the pressing disc. A first spring is arranged between the pressing disc and the disc, and the first spring is sleeved on a section of the U - shaped rod extending into the disc. A movable block is rotatably connected to the end of the U - shaped rod extending into the outer tube; A connecting channel is opened in the side wall of the outer tube. An anti - detachment ring is fixedly connected in the middle of the foaming head between the anti - overflow rings. The anti - detachment ring is communicated with the disc through the connecting channel. A resistance mechanism is arranged in the side wall of the outer tube at the end away from the disc. When the inner tube is inserted to a suitable size, the resistance mechanism is triggered to prevent the inner tube from being inserted too much. The resistance mechanism includes a resistance block, a connecting rod, and a trapezoidal slider; The resistance block is slidably embedded at the end of the outer tube away from the disc. A second spring is arranged between the side wall of the resistance block close to the foaming head and the outer tube. The connecting rod is slidably embedded in the side wall of the outer tube. The two end parts of the connecting rod close to the inner tube extend into circular grooves opened at the end parts of the resistance block. The circular grooves are located on the opposite sides of the two groups of resistance blocks, so that the connecting rod limits the position of the resistance ring. One end of the trapezoidal slider away from the connecting rod is fixedly connected to the center of the connecting rod; One end of the trapezoidal slider away from the connecting rod penetrates the side wall of the outer tube and extends into the tube of the outer tube. The length of the trapezoidal slider extending out of the inner wall of the outer tube is greater than the length of the two end parts of the connecting rod extending into the resistance block.

2. A pull - type cervical secretion collection device for female livestock according to claim 1, It is characterized in that the anti - detachment ring is an inflatable airbag structure, and the U - shaped rod is a three - section structure. The first section is a cylinder of the U - shaped rod away from the outer tube and fixedly connected to the pressing disc. The second section is a cuboid slidably embedded in the inner side wall of the outer tube. The third section is a cross - bar connecting the cylinder and the cuboid.

3. A pull - type cervical secretion collection device for female livestock according to claim 1, It is characterized in that the collector is threadedly connected to the pull ring, and a clamping mechanism is arranged at the end of the collector away from the pull ring. The brush is connected to the collector through the clamping mechanism.

4. A pull - type cervical secretion collection device for female livestock according to claim 3, It is characterized in that A pull rope is slidably embedded in the center of the collector. One end of the pull rope away from the brush is fixedly connected to the end of the pull ring, and the other end of the pull rope is fixedly connected to the clamping mechanism. A limiting groove is opened at one end of the brush close to the collector.

5. A pull-out type female livestock cervical secretion collection device according to claim 4, characterized in that the clamping mechanism includes a concave block, a limiting rod and a fixing rod; one end of the pull rope away from the pull ring is fixedly connected to the end of the concave block. The concave block is embedded in one end of the collector close to the brush and can slide. The limiting rod is arranged on the collector between the concave block and the brush and can rotate by a certain angle. One end of the fixing rod away from the brush is fixedly connected to the center position of the convex block, and one end of the fixing rod away from the concave block extends into the limiting groove.

6. A pull-out type female livestock cervical secretion collection device according to claim 5, characterized in that a frustum-shaped groove is opened at the center of the concave block, and the fixing rod is in a shape similar to a screw, so that when the fixing rod is away from the limiting groove, the limiting rod can be rotated to release the limitation on the limiting groove.

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