Composite sampling tube for virus detection

Abstract

The invention relates to the technical field of medical instruments, and discloses a composite sampling tube for virus detection, the composite sampling tube comprises a sampling tube body and a support body, the sampling tube body is detachably mounted at the bottom of the upper end of the support body, the upper end of the support body is provided with a fixed seat, and the lower closed end of the fixed seat is provided with an avoiding hole; the upper opening end of the fixed seat is provided with a circular-ring-shaped upper seat disc, the fixed seat is internally provided with a circular-ring-shaped inner seat disc, the upper seat disc, the inner seat disc, the avoiding hole and the sampling tube body mounted on the bracket body are coaxial, and the counting and cutting mechanism arranged in the fixed seat comprises a counting component, a cutting component and a driving component. When the cut-off component completes one-time swab cut-off, the counting component achieves one-time counting at the same time, when the cut-off component carries out empty cutting, the counting component does not count, and empty cutting means that when the swab is not inserted into the sampling tube body, the cut-off component carries out the cut-off action.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a composite sampling tube for virus detection. Background Art

[0002] Virus sampling tubes are a common type of medical consumables, often used to store medical samples. A composite sampling tube refers to a sampling tube that can carry multiple medical samples at one time. For example, when taking throat swab samples, usually ten or twenty people are in a group and share one sampling tube. After the medical staff completes the sampling, they usually need to break off the head of the swab and put it into the sampling tube. In actual use, the medical staff usually holds the sampling tube in one hand and inserts the swab head into the sampling tube with the other hand to break it off. On the one hand, it is time-consuming and labor-intensive, and long-term use can easily increase the labor intensity of medical staff. On the other hand, medical staff need to count silently by themselves to ensure that the number of samples in the sampling tube meets the requirements, which undoubtedly increases the workload of medical staff.

[0003] Based on the above deficiencies, a Chinese invention patent with application publication number CN117417816A was found after searching, which discloses a composite sampling tube for detecting viruses. It uses structures such as cutting discs, rockers, pull rods, cutting plates, and rotating rings to achieve cutting of medical cotton swabs. However, it still has some deficiencies: it cannot count, and medical staff still need to count by themselves.

[0004] Based on the above, the present invention proposes a composite sampling tube for virus detection. Summary of the invention

[0005] In order to solve the problems mentioned in the above background, the present invention provides a composite sampling tube for virus detection.

[0006] In order to achieve the above technical objectives, the technical solution adopted by the present invention is as follows.

[0007] A composite sampling tube for virus detection comprises a sampling tube body and a bracket body. The sampling tube body is detachably mounted on the bottom of the upper end of the bracket body. A fixing seat is arranged at the upper end of the bracket body. A avoidance hole is opened at the lower closed end of the fixing seat. An upper seat plate in the shape of a circular ring is arranged at the upper open end of the fixing seat. An inner seat plate in the shape of a circular ring is arranged inside the fixing seat. The upper seat plate, the inner seat plate, the avoidance hole and the sampling tube body mounted on the bracket body are coaxial. A counting and cutting mechanism arranged in the fixing seat comprises a counting component, a cutting component and a driving component. When the cutting component completes a swab cutting, the counting component realizes a counting at the same time. When the cutting component is empty cutting, the counting component does not count. Empty cutting refers to that when the swab is not inserted into the sampling tube body, the cutting component performs a cutting action.

[0008] Furthermore, a mounting hole coaxial with the avoidance hole is provided at the upper end of the bracket body, a threaded sleeve extends from the lower opening of the mounting hole, and the external thread arranged on the sampling tube body and the internal thread arranged on the threaded sleeve can form a threaded connection.

[0009] Furthermore, the inner ring surface of the inner seat disc is coaxially extended upward with a convex ring, the counting member comprises a ratchet coaxially sleeved outside the convex ring, the outer circumferential surface of the ratchet is provided with ratchet teeth, and a plurality of ratchet teeth are arranged in an array along the circumferential direction of the ratchet, the upper end surface of the inner seat disc is provided with an upper boss, the upper boss is provided with a pawl, the end of the pawl is inserted into the ratchet teeth, the pawl is made of an elastic metal sheet, and the pawl cooperates with the ratchet teeth to enable the ratchet to rotate unidirectionally;

[0010] A code dial is provided on the upper end face of each ratchet tooth, and a code hole is opened on the end face of the upper seat plate. During the rotation of the ratchet, the code dial can be coaxially located below the code hole. Each code dial has a number on the upper surface. During the unidirectional rotation of the ratchet, the numbers of the code dials passing through the code hole increase sequentially.

[0011] Furthermore, a connecting rod is installed on the upper boss for radial sliding along the inner seat disk and a spring 1 is arranged between the two. The elastic force of the spring 1 drives the connecting rod away from the ratchet. One end of the connecting rod is located below the inner seat disk and a push seat is installed on the other end for sliding. The sliding direction of the push seat is perpendicular to the sliding direction of the connecting rod and a spring 2 is arranged between the two. The elastic force of the spring 2 drives the push seat to have a movement tendency close to the axis line of the ratchet, and the side of the push seat away from the connecting rod contacts the ratchet teeth.

[0012] Furthermore, a lower boss is provided on the lower end surface of the inner seat disc, and the cutting component includes two cutters which are respectively located on both sides of the inner annular surface of the inner seat disc and are arranged horizontally. The cutters can move in a direction perpendicular to the blade, and a synchronization component is provided between the two cutters.

[0013] Furthermore, the synchronization component includes two racks connected to the two cutters respectively and a gear located between the two racks. The extension direction of the rack is parallel to the movement direction of the cutter. The gear is meshed with the rack. The rack and the lower cam form a sliding connection. A spring three is arranged between the rack and the lower cam. When the elastic force of the spring three drives the rack to move, the two cutters move away from each other.

[0014] Furthermore, a notch is provided on the outer circumferential surface of the fixed seat, and a support located in the notch is extended from the outer circumferential surface of the inner seat disc;

[0015] The driving member includes a handle slidably mounted on the bottom of the support, the sliding direction of the handle is parallel to the sliding direction of the connecting rod, a driving rod is slidably mounted on the side of the handle facing the axis of the avoidance hole, the sliding direction of the driving rod is perpendicular to the sliding direction of the handle, two driving rods are arranged along their own sliding direction and a spring four is arranged between the two, and the elastic coefficient of the spring four is greater than the elastic coefficient of the spring three;

[0016] The cutter near the driving rod is provided with two inclined planes 1 on the side facing the driving rod. When the cutter cuts off the swab, the distance between the two inclined planes 1 decreases in the moving direction of the handle. The driving rod is provided with inclined plane 2 on the side facing inclined plane 1, and inclined plane 2 is in contact with inclined plane 1.

[0017] Furthermore, a clamping groove is provided on each side of the two driving rods facing each other, and the distance between the two groove walls of the clamping groove along the sliding direction of the handle increases gradually along the direction from the groove bottom of the clamping groove to the groove mouth. Initially, the end of the connecting rod is located between the two driving rods and the connecting rod is located on the side of the clamping groove away from the handle. Initially, the distance between the two cutting blades is h1, the diameter of the swab rod is h2, and the distance between the end of the connecting rod and the clamping groove is h3, h3=(h1-h2) / 2.

[0018] Furthermore, a limit assembly is installed on the inner seat disc, and the limit assembly includes a limit rod installed on the inner seat disc along the radial sliding direction of the ratchet wheel, and a slot arranged on the outer circular surface of the ratchet wheel and located below the code dial with the largest number. When the code dial with the largest number is located below the code dial hole, the end of the limit rod is opposite to the slot, and a spring five is arranged between the limit rod and the inner seat disc. Initially, the spring five is compressed.

[0019] Furthermore, a protruding pin is extended from the upper end surface of the driving rod, and a limiting groove is provided on the lower end surface of the inner seat plate. The length direction of the limiting groove is parallel to the sliding direction of the handle. A partition is extended from the groove wall of the limiting groove near the axial center line of the avoidance hole. The extension direction of the partition is parallel to the sliding direction of the handle. Initially, the end of the protruding pin is located in the limiting groove and on the side of the end of the partition away from the axial center line of the avoidance hole, and the end of the protruding pin is located on the side of the partition away from the driving rod.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] This application can realize the truncation of the head of the swab and count it once each time it is truncate, thereby reducing the workload of the staff. On this basis:

[0022] 1. If for various reasons, such as when the staff presses the handle due to carelessness or excessive fatigue, there is no swab inserted, that is, there is no swab to hinder the movement of the cutter, then when the handle moves, the drive rod directly pushes the cutter to move, completing an empty cutting action. During this action, the two drive rods will not move close to each other and will not clamp the connecting rod. Therefore, the counting component will not count, that is: the present application can adaptively determine whether a swab is inserted into the sampling tube body. If yes, the cutter performs the truncation action and counts at the same time. If no, no counting will be performed;

[0023] 2. When the count reaches the maximum, if the staff ignores the technique due to fatigue or other reasons and the swab is cut off again, the ratchet cannot continue to rotate due to the existence of the limit component, and the counting cannot continue. Since the counting action and the cutter cutting off the swab action occur synchronously, the cutter cutting off the swab action is restricted and cannot proceed. That is, after the sampling tube body is equipped with the required number of swab heads, the cutting action cannot continue. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The structure of the present invention is schematically shown Figure 1 ;

[0025] Figure 2 The structure of the present invention is schematically shown Figure 2 ;

[0026] Figure 3 An exploded view of the present invention;

[0027] Figure 4 It is a schematic diagram of the inner seat plate, the counting and cutting mechanism and the limit assembly from a top view;

[0028] Figure 5 It is a schematic diagram of the inner seat plate, the counting and cutting mechanism and the limit assembly from an upward perspective;

[0029] Figure 6 It is a schematic diagram of a counting component and a limiting component;

[0030] Figure 7 An exploded view of the counting component;

[0031] Figure 8 is a schematic diagram of a truncation component and a driving component;

[0032] Fig. 9 is a schematic diagram of a driving member, a cutter and a connecting rod;

[0033] Fig.10 It is a schematic diagram of the convex pin and the limiting groove.

[0034] The reference numerals in the accompanying drawings are:

[0035] 100, sampling tube body; 101, bracket body; 1011, threaded sleeve; 102, fixed seat; 103, inner seat plate; 104, upper seat plate; 1041, code meter hole; 105, spacer; 200, counting and cutting mechanism; 201, ratchet; 2011, slot; 202, ratchet teeth; 203, code meter dial; 204, pawl; 205, push seat; 206, connecting rod; 207, spring one; 208, spring two; 209, cutter; 2091, synchronization component; 2092, spring three; 210, handle; 211, drive rod; 2111, clamping groove; 2112, convex pin; 212, spring four; 213, limit groove; 214, partition; 300, limit assembly; 301, limit rod; 302, spring five. DETAILED DESCRIPTION

[0036] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation mode, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0037] Reference Figure 1-Figure 10 A composite sampling tube for virus detection includes a sampling tube body 100 and a bracket body 101. A mounting hole is opened at the upper end of the bracket body 101, and a threaded sleeve 1011 extends at the lower hole of the mounting hole. The external thread arranged on the tube mouth of the sampling tube body 100 cooperates with the internal thread arranged on the threaded sleeve 1011 to achieve a detachable connection between the sampling tube body 100 and the bracket body 101. A counting and cutting mechanism 200 is also installed at the upper end of the bracket body 101 for cutting off the head of the swab and counting the number of swab heads cut off and entering the sampling tube body 100, thereby reducing the workload of the staff.

[0038] Reference Figure 3 The upper end of the bracket body 101 is provided with a fixing seat 102, and the lower closed end of the fixing seat 102 is provided with an avoidance hole coaxial with the mounting hole. The upper open end of the fixing seat 102 is provided with an upper seat plate 104 in the shape of a circular ring, and an inner seat plate 103 in the shape of a circular ring is provided inside the fixing seat 102. The upper seat plate 104, the inner seat plate 103 and the avoidance hole are coaxial, and the counting and cutting off mechanism 200 is located in the fixing seat 102. When in use, the head of the swab faces downward, passes through the upper seat plate 104, the inner seat plate 103, the avoidance hole and the mounting hole in sequence, and is located in the sampling tube body 100, and then the counting and cutting off mechanism 200 is used to cut off the swab head. Preferably, during the process of inserting the swab head into the sampling tube body 100, the counting and cutting off mechanism 200 is reused. In order to prevent the swab head from contacting with the parts in the fixing seat 102 due to hand shaking of the staff, which is easy to cause cross infection, refer to Figure 1 and Figure 3A spacer sleeve 105 is coaxially inserted into the upper base plate 104. Its significance lies in that the spacer sleeve 105 is disposable. After being inserted into the upper base plate 104, the bottom end of the spacer sleeve 105 is close to the cutter 209 of the counting and cutting mechanism 200. Therefore, during the swab insertion process, even if the staff shakes their hands, the contact between the swab head and the spacer sleeve 105 will not be affected, because the spacer sleeve 105 is a disposable utensil. After a preset number of swab heads exist in the sampling tube body 100, the sampling tube body 100 and the spacer sleeve 105 are removed, and a new sampling tube body 100 and the spacer sleeve 105 are installed.

[0039] Reference Figure 4-Figure 10 The counting and cutting mechanism 200 includes a counting component, a cutting component and a driving component.

[0040] Reference Figure 4 , Figure 6 and Figure 7 The counting member is located between the inner seat plate 103 and the upper seat plate 104 .

[0041] The inner ring surface of the inner seat disc 103 is coaxially extended with a convex ring upward, and the counting member includes a ratchet 201 coaxially sleeved on the outside of the convex ring, the ratchet 201 can rotate, and the outer circumferential surface of the ratchet 201 is provided with ratchet teeth 202, and a plurality of ratchet teeth 202 are arranged in an array along the circumferential direction of the ratchet 201, and the drawings of the present application show ten of them, and the upper end surface of each ratchet tooth 202 is provided with a code meter dial 203, and the end surface of the upper seat disc 104 is provided with a code meter hole 1041. During the rotation of the ratchet 201, the code meter dial 203 can be coaxially located below the code meter hole 1041. Further, the upper surface of each code meter dial 203 has a number, 1, 2 in sequence. , 3…n, n is the number of ratchet teeth 202. Initially, the code dial 203 numbered 1 is located below the code dial hole 1041. Every time the ratchet 201 rotates 360 / n angles, the next code dial 203 will be located below the code dial hole 1041 in turn. Therefore, the number of the code dial 203 can be used to know how many times the ratchet 201 has rotated. Each rotation of the ratchet 201 means that the cutting component completes a cut of the swab. Therefore, the number of swab heads placed in the sampling tube body 100 can be known, that is, the number of swab heads in the sampling tube body 100 can be known according to the number of the code dial 203 below the code dial hole 1041.

[0042] An upper boss is provided on the upper end surface of the inner seat disc 103, and a pawl 204 is provided on the upper boss. The end of the pawl 204 is inserted into the ratchet tooth 202. The pawl 204 is made of elastic metal sheet material. The pawl 204 cooperates with the ratchet tooth 202 to enable the ratchet 201 to rotate only in one direction. During the unidirectional rotation, the number of the code dial 203 passing through the code table hole 1041 increases sequentially.

[0043] Furthermore, a connecting rod 206 is radially slidably installed on the upper convex frame along the inner seat disc 103, and a spring 1 207 is arranged between the two. The elastic force of the spring 1 207 drives the connecting rod 206 away from the ratchet 201. One end of the connecting rod 206 is located below the inner seat disc 103, and a push seat 205 is slidably installed on the other end. The sliding direction of the push seat 205 is perpendicular to the sliding direction of the connecting rod 206, and a spring 208 is arranged between the two. The spring 208 is located on the side of the push seat 205 facing the axis of the ratchet 201, and its elastic force drives the push seat 205 to have a movement trend close to the axis of the ratchet 201, and the push seat 205 is away from the side of the connecting rod 206. When the connecting rod 206 contacts the ratchet teeth 202 and moves closer to the ratchet 201, the spring 1 207 is compressed and the ratchet 201 is pushed to rotate by the push seat 205. During the pushing process, due to the presence of the spring 208, the push seat 205 maintains contact with the ratchet teeth 202, so that the pushing action can be carried out smoothly. After the pushing is completed, the spring 1 207 releases the elastic force and pulls the connecting rod 206 away from the ratchet 201. Since the ratchet 201 can only rotate in one direction, the connecting rod 206 can pull the push seat 205 to reset, but the ratchet 201 will not rotate. After resetting, the push seat 205 contacts the next ratchet tooth 202.

[0044] Reference Figure 8 The truncation member is located below the inner seat disc 103 , and a lower boss is provided on the lower end surface of the inner seat disc 103 .

[0045] The cutting member comprises two cutters 209 which are respectively located on both sides of the inner annular surface of the inner seat disc 103 and are arranged horizontally. The cutters 209 can move in a direction perpendicular to the blade. The two cutters 209 cooperate to cut off the swab.

[0046] A synchronization component 2091 is provided between the two cutters 209 for driving the two cutters 209 to move at the same speed but in different directions. Furthermore, two groups of synchronization components 2091 are provided and are respectively located at the two ends of the cutters 209 .

[0047] The synchronization component 2091 includes two racks connected to the two cutters 209 respectively and a gear located between the two racks. The extension direction of the rack is parallel to the movement direction of the cutter 209. The gear is meshed with the rack. The rack and the lower cam form a sliding guide to limit the movement of the cutter 209 in a direction perpendicular to the blade. A spring three 2092 is arranged between the rack and the lower cam. When the elastic force of the spring three 2092 drives the rack to move, the two cutters 209 move away from each other.

[0048] Reference Figure 3 and Figure 8-Figure 10 The outer circumferential surface of the fixed seat 102 is provided with a notch, and the outer circumferential surface of the inner seat disc 103 is extended with a support located in the notch.

[0049] The driving component includes a handle 210 slidably installed at the bottom of the support. The sliding direction of the handle 210 is parallel to the sliding direction of the connecting rod 206. The staff holds the bracket body 101 with their thumb holding the handle 210 and the remaining four fingers holding the column of the bracket body 101. Then, the thumb is pressed slightly to drive the handle 210 to move close to the axis of the mounting hole.

[0050] A driving rod 211 is slidably installed on one side of the handle 210 toward the axis of the mounting hole. The sliding direction of the driving rod 211 is perpendicular to the sliding direction of the handle 210. Two driving rods 211 are arranged along their own sliding direction, and a spring four 212 is arranged between the two driving rods 211. The elastic coefficient of the spring four 212 is greater than the elastic coefficient of the spring three 2092.

[0051] The cutter 209 close to the driving rod 211 is provided with two inclined planes 1 on the side facing the driving rod 211. When the cutter 209 cuts off the swab, the movement direction of the handle 210 decreases. The driving rod 211 is provided with inclined plane 2 on the side facing inclined plane 1, and inclined plane 2 is in contact with inclined plane 1.

[0052] A clamping groove 2111 is respectively provided on one side of the two driving rods 211 facing each other. The distance between the two groove walls of the clamping groove 2111 along the sliding direction of the handle 210 increases along the direction from the groove bottom of the clamping groove 2111 to the groove opening. Initially, the end of the connecting rod 206 is located between the two driving rods 211 and the connecting rod 206 is located on the side of the clamping groove 2111 away from the handle 210. In addition, when the end of the connecting rod 206 is clamped by the two clamping grooves 2111, the groove walls and bottoms of the clamping groove 2111 are respectively fitted with the corresponding outer surfaces of the connecting rod 206. Initially, the distance between the blades of the two cutters 209 is h1, the diameter of the swab rod is h2, and the distance between the end of the connecting rod 206 and the clamping groove 2111 is h3, h3=(h1-h2) / 2; its meaning is:

[0053] When the staff drives the handle 210 to move close to the axis line of the mounting hole, at the beginning, since the elastic coefficient of the spring four 212 is greater than the elastic coefficient of the spring three 2092, the handle 210 moves through the driving rod 211 to drive the cutter 209 to move, so that the two cutters 209 are close to each other. In this process, since the two cutters 209 move at the same speed but in different directions, there is a self-centering effect, which can make the axis line of the swab rod coincide with the axis line of the mounting hole. Therefore, when the cutter 209 contacts the swab rod, the end of the connecting rod 206 is located between the two clamping grooves 2111. Then, since a certain force is required to cut off the swab rod, and this force is greater than the force required to compress the spring four 212, on the inclined plane one In cooperation with the second inclined surface, the movement of the handle 210 will cause the two driving rods 211 to move closer to each other, thereby clamping the ends of the connecting rod 206 through the two clamping grooves 2111. After clamping, the driving rods 211 cannot continue to move closer to each other, so the continued movement of the handle 210 will continue to drive the driving rods 211 to move together, and the driving rods 211 push the cutter 209 to move to cut off the swab rod. At the same time, the two driving rods 211 will move with the connecting rod 206, and the movement of the connecting rod 206 will drive the ratchet 201 to rotate. When the swab rod is cut off, the ratchet 201 also rotates 360 / n degrees, that is, when the cutting component completes one cut of the swab, the counting component counts once synchronously.

[0054] During the above process, it should be noted that the movement of the handle 210 mentioned above will cause the two driving rods 211 to move closer to each other. During this process, the cutter 209 may cut a little on the outside of the swab rod. Since the diameter of the swab rod cannot be exactly the same, there may be an alignment error between the clamping groove 2111 and the end of the connecting rod 206, but the error is very small. Since the distance between the two groove walls of the clamping groove 2111 along the sliding direction of the handle 210 increases along the direction from the bottom of the clamping groove 2111 to the groove mouth, the two inclined groove walls can adapt to the error and clamp the end of the connecting rod 206.

[0055] In addition, if for various reasons, such as the staff presses the handle 210 due to carelessness or excessive fatigue, since there is no swab inserted, that is, there is no swab to hinder the movement of the cutter 209, then when the handle 210 moves, it directly pushes the cutter 209 to move through the driving rod 211 to complete an empty cutting action. During this action, the two driving rods 211 will not move towards each other and will not clamp the connecting rod 206. Therefore, the counting component will not count, that is: the present application can adaptively determine whether a swab is inserted into the sampling tube body 100. If so, the cutter 209 performs the cutting action and counts at the same time. If not, no counting will be performed.

[0056] In a preferred embodiment, during the process of the cutter 209 cutting off the swab, since the cutter 209 has a certain thickness, the swab may be cut off before the blades of the two cutters 209 touch each other. In this case, due to the obstruction of the lost swab, the spring 4 212 will release its elastic force at the first time, thereby canceling the clamping of the connecting rod 206, which will cause the rotation angle of the ratchet 201 to fail to reach 360 / n degrees. In this way, as the number of times increases, the rotation angle errors of the ratchet 201 each time accumulate together, and it is easy to cause the code dial 203 that should have appeared under the code meter hole 1041 to not appear, thereby causing counting errors. In order to solve this problem, refer to Fig. 9 and Fig.10 A convex pin 2112 is extended from the upper end surface of the driving rod 211, and a limiting groove 213 is provided on the lower end surface of the inner seat plate 103. The length direction of the limiting groove 213 is parallel to the sliding direction of the handle 210. A partition plate 214 is extended from the groove wall of the limiting groove 213 close to the axis of the mounting hole. The extension direction of the partition plate 214 is parallel to the sliding direction of the handle 210. Initially, the end of the convex pin 2112 is located in the limiting groove 213 and on the side of the end of the partition plate 214 away from the axis of the mounting hole, so as to prevent the convex pin 2112 from sliding. Fig.10 The perspective of the limiting groove 213 shown in the figure is used as an example to illustrate: when the air cutting action occurs, the convex pin 2112 will slide in the part of the limiting groove 213 located above the partition 214, and the air cutting action will proceed normally; when the swab cutting action occurs, from the beginning to the process in which the two driving rods 211 move towards each other, the convex pin 2112 is located on the side of the end of the partition 214 away from the axial center line of the mounting hole, and then, because the two driving rods 211 move towards each other, the convex pin 2112 will be carried under the partition 214, and then Afterwards, the protruding pin 2112 slides in the part of the limiting groove 213 located below the partition 214, thereby limiting the two driving rods 211 from moving away from each other. That is, in the subsequent cutting process, even if the swab is cut off in advance and loses the obstruction of the swab, the spring four 212 still cannot release the elastic force, and the driving rod 211 and the connecting rod 206 are still clamped until the pressing of the handle 210 is completed, which means the cutting is completed. After the counting is completed, the handle 210 is released and the counting and cutting mechanism 200 is automatically reset.

[0057] In a preferred embodiment, when the count reaches the maximum number, continuing to press the handle 210 can continue to cut off the swab, but the count starts again from 1. Therefore, if the staff is tired and ignores the count, it is also easy to make a count error. In order to solve this problem, refer to Figure 4 and Figure 6The inner seat disc 103 is provided with a limit assembly 300, which includes a limit rod 301 radially slidably mounted on the inner seat disc 103 along the ratchet 201 and a slot 2011 arranged on the outer circumferential surface of the ratchet 201 and located below the code dial 203 with the largest number. When the code dial 203 with the largest number is located below the code dial hole 1041, the end of the limit rod 301 faces the slot 2011. A spring 5 302 is arranged between the limit rod 301 and the inner seat disc 103. Initially, the spring 5 302 is compressed. When the count reaches the maximum, the end of the limit rod 301 faces the slot 2011. , spring five 302 releases its elastic force, so that the end of the limit rod 301 is inserted into the slot 2011, thereby limiting the rotation of the ratchet 201. Then, when the staff ignores the counting and cuts off the swab again, during the cutting-off action, after the two driving rods 211 clamp the connecting rod 206, the ratchet 201 is restricted from rotating, so that the connecting rod 206 is restricted from moving, and thus the driving rod 211 is restricted from moving, and the handle 210 cannot be pressed down further, that is, after the maximum count is reached, the sampling tube body 100 is filled with the required number of swab heads, and then the cutting-off action cannot continue.

[0058] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A composite sampling tube for virus detection, comprising a sampling tube body (100) and a bracket body (101), characterized in that: The sampling tube body (100) is detachably mounted on the bottom of the upper end of the bracket body (101); a fixing seat (102) is provided on the upper end of the bracket body (101); a avoidance hole is provided at the lower closed end of the fixing seat (102); an upper seat plate (104) in the shape of a circular ring is provided at the upper open end of the fixing seat (102); an inner seat plate (103) in the shape of a circular ring is provided inside the fixing seat (102); the upper seat plate (104), the inner seat plate (103), the avoidance hole and the sampling tube body (100) mounted on the bracket body (101) are coaxial; a counting and cutting mechanism (200) arranged in the fixing seat (102) comprises a counting member, a cutting member and a driving member; when the cutting member completes a swab cutting, the counting member simultaneously realizes a counting; when the cutting member is empty-cut, the counting member does not count; empty-cut means that when the swab is not inserted into the sampling tube body (100), the cutting member performs a cutting action.

2. A composite sampling tube for virus detection according to claim 1, characterized in that: A mounting hole coaxial with the avoidance hole is provided at the upper end of the bracket body (101), a threaded sleeve (1011) extends from the lower opening of the mounting hole, and the external thread provided on the sampling tube body (100) and the internal thread provided on the threaded sleeve (1011) can form a threaded connection.

3. A composite sampling tube for virus detection according to claim 1, characterized in that: The inner ring surface of the inner seat disc (103) is coaxially provided with a convex ring extending upward, the counting member comprises a ratchet (201) coaxially sleeved outside the convex ring, the outer circumferential surface of the ratchet (201) is provided with ratchet teeth (202), a plurality of ratchet teeth (202) are arranged in an array along the circumferential direction of the ratchet (201), the upper end surface of the inner seat disc (103) is provided with an upper boss, the upper boss is provided with a pawl (204), the end of the pawl (204) is inserted into the ratchet teeth (202), the pawl (204) is made of an elastic metal sheet, the pawl (204) cooperates with the ratchet teeth (202), and can make the ratchet (201) rotate unidirectionally; The upper end surface of each ratchet tooth (202) is provided with a code dial (203), and the end surface of the upper base plate (104) is provided with a code dial hole (1041). During the rotation of the ratchet (201), the code dial (203) can be coaxially located below the code dial hole (1041). The upper surface of each code dial (203) is provided with a number. During the unidirectional rotation of the ratchet (201), the numbers of the code dials (203) passing through the code dial hole (1041) are increased in sequence.

4. A composite sampling tube for virus detection according to claim 3, characterized in that: A connecting rod (206) is radially slidably mounted on the upper convex frame along the inner seat disc (103) and a spring 1 (207) is arranged between the two. The elastic force of the spring 1 (207) drives the connecting rod (206) away from the ratchet (201). One end of the connecting rod (206) is located below the inner seat disc (103) and a push seat (205) is slidably mounted on the other end. The sliding direction of the push seat (205) is perpendicular to the sliding direction of the connecting rod (206) and a spring 2 (208) is arranged between the two. The elastic force of the spring 2 (208) drives the push seat (205) to have a movement tendency close to the axis line of the ratchet (201), and the side of the push seat (205) away from the connecting rod (206) contacts the ratchet teeth (202).

5. A composite sampling tube for virus detection according to claim 4, characterized in that: The lower end surface of the inner seat disc (103) is provided with a lower boss, and the cutting component comprises two cutters (209) respectively located on both sides of the inner annular surface of the inner seat disc (103) and arranged horizontally, the cutters (209) can move in a direction perpendicular to the blade, and a synchronization component (2091) is provided between the two cutters (209).

6. A composite sampling tube for virus detection according to claim 5, characterized in that: The synchronization component (2091) includes two racks connected to the two cutters (209) respectively and a gear located between the two racks, the extension direction of the rack is parallel to the movement direction of the cutter (209), the gear is meshed with the rack, the rack is slidably connected to the lower convex frame, and a spring three (2092) is arranged between the rack and the lower convex frame, and when the spring three (2092) drives the rack to move, the two cutters (209) move away from each other.

7. A composite sampling tube for virus detection according to claim 6, characterized in that: The outer circumferential surface of the fixed seat (102) is provided with a notch, and the outer circumferential surface of the inner seat plate (103) is extended with a support seat located in the notch; The driving component comprises a handle (210) slidably mounted on the bottom of the support, the sliding direction of the handle (210) is parallel to the sliding direction of the connecting rod (206), a driving rod (211) is slidably mounted on the side of the handle (210) facing the axis of the avoidance hole, the sliding direction of the driving rod (211) is perpendicular to the sliding direction of the handle (210), two driving rods (211) are arranged along their own sliding direction, and a spring four (212) is arranged between the two, and the elastic coefficient of the spring four (212) is greater than the elastic coefficient of the spring three (2092); The cutter (209) close to the driving rod (211) is provided with two inclined planes 1 on the side facing the driving rod (211); when the cutter (209) cuts off the swab, the distance between the two inclined planes 1 decreases along the movement direction of the handle (210); and the driving rod (211) is provided with an inclined plane 2 on the side facing the inclined plane 1, and the inclined plane 2 is in contact with the inclined plane 1.

8. A composite sampling tube for virus detection according to claim 7, characterized in that: A clamping groove (2111) is respectively provided on one side of the two driving rods (211) facing each other, and the distance between the two groove walls of the clamping groove (2111) along the sliding direction of the handle (210) increases along the direction from the groove bottom of the clamping groove (2111) to the groove opening. Initially, the end of the connecting rod (206) is located between the two driving rods (211) and the connecting rod (206) is located on the side of the clamping groove (2111) away from the handle (210). Initially, the distance between the blades of the two cutters (209) is h1, the diameter of the rod of the swab is h2, and the distance between the end of the connecting rod (206) and the clamping groove (2111) is h3, where h3=(h1-h2) / 2.

9. A composite sampling tube for virus detection according to claim 4, characterized in that: A limit assembly (300) is installed on the inner seat disc (103), and the limit assembly (300) comprises a limit rod (301) radially slidably installed on the inner seat disc (103) along the ratchet wheel (201), and a slot (2011) arranged on the outer circumferential surface of the ratchet wheel (201) and located below the code dial (203) with the largest number. When the code dial (203) with the largest number is located below the code hole (1041), the end of the limit rod (301) faces the slot (2011), and a spring five (302) is arranged between the limit rod (301) and the inner seat disc (103). Initially, the spring five (302) is compressed.

10. A composite sampling tube for virus detection according to claim 8, characterized in that: A convex pin (2112) extends from the upper end surface of the driving rod (211), and a limiting groove (213) is provided on the lower end surface of the inner seat plate (103). The length direction of the notch of the limiting groove (213) is parallel to the sliding direction of the handle (210). A partition (214) extends from the groove wall of the limiting groove (213) close to the axial center line of the avoidance hole. The extension direction of the partition (214) is parallel to the sliding direction of the handle (210). Initially, the end of the convex pin (2112) is located in the limiting groove (213) and on the side of the end of the partition (214) away from the axial center line of the avoidance hole, and the end of the convex pin (2112) is located on the side of the partition (214) away from the driving rod (211).

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