WO2017107687A1

WO2017107687A1 - Liquid extraction piece for airtight body fluid indwelling device

Info

Publication number: WO2017107687A1
Application number: PCT/CN2016/104889
Authority: WO
Inventors: 单希杰
Original assignee: 单希杰
Priority date: 2015-12-26
Filing date: 2016-11-07
Publication date: 2017-06-29

Abstract

Provided is a liquid extraction piece for an airtight body fluid indwelling device used to collect body fluids, comprising an annular side wall A (1) and an annular side wall B (2); a flow-conducting passage (10) formed by the enclosure of the annular side wall A (1); and an exhaust passage (21) formed by the enclosure of the annular side wall B (2), wherein the upper part of the annular side wall B (2) does not connect with the annular side wall A (1), and the smallest part of the sectional area of the flow-conducting passage (10) is equal to or greater than 3 mm² and is equal to or less than 15 mm²; and the smallest part of the sectional area of the exhaust passage (21) is equal to or greater than 3 mm²and is equal to or less than 15 mm². The liquid extraction piece has the advantages of being easy to manufacture, having decreased production costs, high production efficiency and being able to prevent backflow.

Description

Liquid taking part for sealed body fluid indweller

Technical field

The present invention relates to medical devices, and more particularly to devices for collecting body fluids.

Background technique

The liquid take-up member for the closed body fluid indwelling device of the prior art only has a flow guiding channel, and no exhausting passage is provided, especially for injecting liquid into the small-diameter container, and when the liquid-collecting member is sealed and matched with the container, the liquid retention often occurs. Even if the liquid take-up member is provided with an exhaust passage, during the liquid guiding process, there is still liquid flowing to the lower outlet of the exhaust passage to block the lower outlet to cause liquid retention. In addition, the liquid take-up member is provided with an exhaust passage, but the production and processing are complicated, the cost is high, the production efficiency is low, and the flow velocity is not fast enough.

Summary of the invention

An object of the present invention is to provide a liquid take-off member for a sealed body fluid indwelling device which is simple in processing, low in production cost, high in production efficiency, fast in flow guiding, and capable of preventing backflow.

The object of the invention is achieved in this way:

A liquid take-up member for a sealed body fluid indweller, comprising an annular side wall armor and an annular side wall B. The annular side wall is enclosed to form a liquid guiding channel having an upper opening arm and a lower opening armor. The upper opening arm is located at an uppermost end of the liquid guiding channel, and the lower opening arm is located at a lowermost end of the liquid guiding channel. The annular side wall arm may include an upper portion of the annular side wall arm, a bottom sealing plate and a lower portion of the annular side wall arm; or may include only an upper portion of the annular side wall and a lower portion of the annular side wall. When the annular side wall arm includes an upper portion of the annular side wall arm, the bottom sealing plate and the lower side of the annular side wall, the bottom sealing plate is located in the liquid guiding channel, and the annular side wall arm is divided into an upper part of the annular side wall and a ring shape. The lower part of the side wall. The upper part of the annular side wall is located above the bottom sealing plate, and the lower part of the annular side wall is located below the bottom sealing plate. The upper part of the annular side wall is used for collecting and collecting liquid; the lower part of the annular side wall is used for connection with the liquid storage device; the inner diameter of the flow guiding channel at the upper part of the annular side wall and the flow guiding channel of the lower part of the annular side wall The inner diameter of the annular flow duct is generally larger than the inner diameter of the flow guiding passage at the lower part of the annular side wall. One of the functions of the bottom sealing plate is to collect the liquid guiding channel located at the upper part of the annular side wall A. The liquid is transferred to the liquid guiding channel in the lower part of the annular side wall to serve as a connection transition. .

When the annular side wall arm includes only the upper part of the annular side wall armor and the lower part of the annular side wall armor, the upper part of the annular side wall armor The inner diameter of the joint with the lower portion of the annular side wall is reduced to coincide with the inner diameter of the lower portion of the annular side wall, and the inner diameter of the upper portion of the annular side wall may be gradually decreased or stepwise decreased.

In the above solution, the upper part of the annular side wall is provided with a bend, and the number of the bends may be 1, 2, 3, etc. When the annular side wall arm A is provided with a turn, the turn may be an inward fold of the annular side wall armor. And extended to form.

The annular side wall B is a straight tubular shape.

The annular side wall B may be located in the enclosed space of the annular side wall, or may be located outside the enclosed space of the annular side wall. The annular side wall B may be located in the annular side wall armor enclosure space: the annular side wall B is located at the center of the annular side wall armor enclosure space, or may be located adjacent to the annular side wall armor.

When the annular side wall B is located in the annular side wall armor enclosure space, the upper portion of the annular side wall B is not connected to the annular side wall arm. Further, when the annular side wall B is thinner, an axial reinforcing rib may be disposed between the upper portion of the annular side wall B and the annular side wall A, and the reinforcing rib connects the upper part of the annular side wall And the upper part of the annular side wall B, the reinforcing rib may also be connected with the bottom sealing plate, and the reinforcing rib is used to increase the fastness of the annular side wall B. However, when the wall thickness of the annular side wall is large, the reinforcing rib is not required. When the annular side wall B is located outside the annular side wall enclosure space, the upper portion of the annular side wall B and the annular side wall arm can share a partial side wall or the like.

The minimum cross-sectional area of the flow guiding channel is greater than or equal to 3 mm ² and less than or equal to 15 mm ² ; the minimum cross-sectional area of the exhaust passage is greater than or equal to 3 mm ² and less than or equal to 15 mm ² .

The lower part of the annular side wall B is located in the lower opening armor, and the lower part of the annular side wall arm and the lower part of the annular side wall B have a common side wall; the upper part of the annular side wall B is adjacent to the upper part of the annular side wall; The uppermost end of the side wall arm A is connected to a shortest line segment perpendicular to the annular side wall B or the axially extending annular side wall B, and the shortest line segment length is not greater than an extension line of the shortest line segment or a straight line parallel to the shortest line segment 35% of the length of the longest segment formed by the intersection of the uppermost end of the inner edge of the annular side wall. Preferably, the shortest line segment length is no more than 25% of the length of the longest line segment. Preferably, the shortest line segment length is not more than 20% of the length of the longest line segment. Preferably, the shortest line segment length is no more than 10% of the length of the longest line segment. That is, the upper portion of the annular side wall B is not in the center of the flow guiding passage at the upper portion of the annular side wall, but is adjacent to the side wall of the upper portion of the annular side wall. The shortest line segment from the uppermost end of the annular side wall to the annular side wall B is: a line connecting the shortest vertical distance between the annular side wall B and the uppermost end of the annular side wall A, or the axial extension of the annular side wall B The line between the shortest vertical distance between the rear and the uppermost end of the annular side wall.

In the above solution, a liquid take-up member for a closed body fluid indwelling device comprises an annular side wall arm for enclosing a flow guiding passage for collecting liquid; and an annular side wall B for enclosing the exhaust passage formed, and for Test tube a connecting portion, the connecting portion is integrally formed with the annular side wall A and the annular side wall B; the axis of the annular side wall A does not coincide with the axis of the connecting portion, and the annular side wall B The axis is away from the axis of the annular side wall A, and the exhaust passage is straight. The annular side wall arm is a conical shape truncated by a slope (ignoring the liquid guiding nozzle). The axis of the annular side wall A is parallel to the axis of the annular side wall B.

In the above solution, the distance between the axis of the annular side wall arm A and the axis of the annular side wall B is greater than or equal to 10 mm and less than or equal to 50 mm. In the above solution, the distance between the annular side wall B and the annular side wall A is not more than 20 mm.

In the above aspect, the common side wall refers to a common side wall for partitioning the liquid guiding passage and the exhaust passage, and the wall thickness of the common side wall is 0.3 mm or more and 5 mm or less. The common side wall extends downward to form a partition body, and the partition body is provided with an axial groove, that is, the common side wall is provided with an axial groove. The axial grooves extend the life of the production mold. An axial blind hole may also be provided on the common side wall. The blind holes can reduce the shrinkage rate of the common side wall in the production process, thereby improving the yield of the product.

In the above solution, the area of the exhaust passage formed by the annular side wall B is the smallest, and the area of the cross-sectional area is at least 3 mm ² and less than or equal to 15 mm ² . The minimum cross-sectional area of the exhaust passage is located at the lower outlet B of the exhaust passage, and the area of the exhaust passage having the smallest cross-sectional area is greater than or equal to 3 mm ² and less than or equal to 15 mm ^{2 ,} which can effectively form a plug when the liquid take-up piece dumps excess liquid therein. The liquid film prevents the liquid in the test tube from pouring out of the exhaust passage.

In the above solution, the annular side wall is enclosed to form a flow guiding channel, the upper part of the annular side wall is used for collecting liquid, the lower part of the annular side wall is used for connection, and the lower part of the annular side wall is deflected. The area where the cross-sectional area of the channel is the smallest is greater than or equal to 3 mm ² and less than or equal to 15 mm ² . The cross-sectional area of the flow guiding channel is the smallest at the liquid outlet of the flow guiding channel at the lower part of the annular side wall. The area where the cross-sectional area of the flow guiding channel is the smallest is greater than or equal to 3 mm ² and less than or equal to 15 mm ² , and the liquid film can be effectively formed when the liquid take-up piece is poured out of the excess liquid, thereby preventing the liquid in the test tube from pouring out from the flow guiding channel.

In the above solution, the minimum cross-sectional area of the exhaust passage is smaller than the minimum cross-sectional area of the flow guide passage. In the prior art, the exhaust passage is provided with a bend, which is not a straight tube shape. Therefore, the minimum cross-sectional area of the exhaust passage is greater than or equal to the cross-sectional area of the cross-sectional area of the guide passage, and the storage in the test tube matched with the liquid take-up member. When the liquid is full, there is still liquid in the flow guiding channel of the liquid taking part, and the excess liquid in the liquid taking part needs to be dumped, and the liquid take-off piece and the test tube can be separated, and the cross-sectional area of the exhaust passage is the smallest than the liquid guiding liquid. The channel cross-sectional area is the smallest, so the bending of the exhaust passage can prevent the liquid in the test tube from pouring out through the exhaust passage. However, a disadvantage of the prior art is that the gas in the test tube is discharged slowly during the liquid infusion of the test tube due to the presence of the bend in the exhaust passage. In the present invention, a straight tubular annular side wall B is used to form an exhaust passage, so that the gas in the test tube is discharged faster, in addition, The minimum cross-sectional area of the exhaust passage is smaller than the minimum cross-sectional area of the flow passage. When the excess liquid in the liquid take-up member is drained, the liquid film is more easily formed at the lower outlet B of the exhaust passage, thereby effectively preventing the liquid from being exhausted. The channel is poured out.

In the above solution, at least a portion of the lower portion of the liquid guiding channel has an elliptical, circular or semi-circular cross section, or at least a portion of the exhaust passage has an elliptical, circular or semi-circular cross section, or at least a portion of the lower portion of the liquid guiding channel The cross section is elliptical, circular or semi-circular and at least part of the exhaust passage has an elliptical, circular or semi-circular cross section. The exhaust passage and the flow guiding passage at the joint of the liquid take-up are elliptical in cross section, which can reduce the wall thickness and reduce the amount of materials without affecting the liquid guiding and exhausting.

In the above solution, the shape of the annular side wall arm (ignoring the liquid guiding nozzle) may be regular, such as left and right, front and rear symmetrical, truncated cone shape, etc., or may be an irregular shape.

In the above solution, the bottom sealing plate is used for connecting the upper part of the annular side wall and the lower part of the annular side wall respectively; the bottom sealing plate is provided with a flow guiding surface, and the guiding surface comprises at least one inclined surface The flow guiding surface may be elongated or may be other shapes, but is not limited thereto. The flow guiding surface may be horizontally disposed or obliquely disposed. When disposed obliquely, the flow guiding surface is composed of two inclined surfaces and the two inclined surfaces are connected at a lower portion to form a V shape. The lower end of the flow guiding surface is connected to the flow guiding channel at the lower part of the annular side wall. The flow guiding surface and the side surface of the bottom sealing plate form a drainage channel having a potential difference. The diversion channel can give a good guiding effect to the liquid, and the flow rate can be adjusted to shorten the perfusion rate.

In the above solution, the liquid taking member is projected downward on the plane Q, and the projected outer contour N of the lower opening arm A of the annular side wall arm is closest to the projected outer contour M of the upper opening arm of the annular side wall arm A. Connecting a straight line in the up-down direction or the left-right direction of the projected outer contour N, the straight line forming two line segments A and a line segment B having different lengths at least between the projected outer contour N and the projected outer contour M; The projected outer contour R of the wall B is located within the projected outer contour N, the projected outer contour N being located within the projected outer contour M and not intersecting.

Further, the line segment B is a line connecting the projected outer contour N and the projected outer contour M, and the line segment B is not more than 45% of the line segment A.

In the above solution, the liquid taking member is projected downward on the plane Q, and the projected outer contour N of the lower opening arm A of the annular side wall arm is closest to the projected outer contour M of the upper opening arm of the annular side wall arm A. Connecting a straight line in the up-down direction or the left-right direction of the projected outer contour N, the straight line forming at least three line segments between the projected outer contour N and the projected outer contour M, the projected outer contour N and the projection The contours M intersect, the intersection is P, the line segments C and the line segments are divided into two sides of the intersection P, and the line segments 戊 are located in the intersection P, and the line segments C are different from the lengths of the line segments or segments. The length of the segment D and the segment pent may be the same or may be inconsistent.

When the line segment 戊 is the line where the straight line is closest between the projected outer contour N and the projected outer contour M, Line segment 戊 is not greater than 45% of line segment C. Or the line segment is the line where the straight line is closest to the projected outer contour N and the projected outer contour M, and the line segment is not more than 45% of the line segment C. Or when the line segment E is equal to the length of the line segment, the line segment is not more than 45% of the line segment C when the line is closest to the line between the projected outer contour N and the projected outer contour M.

In the above solution, the upper part of the annular side wall is used for collecting liquid, and the lower part of the annular side wall is used for the connection with the test tube, and the axis of the annular side wall B is parallel to the axis of the lower part of the annular side wall.

In the above solution, the axis of the upper portion of the annular side wall is not coincident with the axis of the lower portion of the annular side wall, and the axis of the annular side wall B is away from the axis of the upper portion of the annular side wall.

In the above solution, the cross-sectional area of the flow guiding channel at least part of the annular side wall armor is not equal. Wherein, the cross-sectional area of the flow guiding channel guides the cross-sectional area of the cross section of the flow channel. For example, a stepper is provided in the flow guiding channel at the lower part of the annular side wall; the guiding channel of the lower part of the annular side wall can be a step of narrowing the upper and lower sides, or a step of narrowing the upper and lower sides. When the liquid take-up member dumps the excess liquid, the lower width of the flow guiding passage at the lower portion of the annular side wall can prevent the liquid in the test tube from being poured out from the flow guiding passage of the liquid take-up member. The narrowing and wide step is arranged in the flow guiding channel of the lower part of the annular side wall arm, which is beneficial to the production of the mold and improves the yield.

In the above solution, the cross-sectional area of the exhaust passage of at least part of the annular side wall B is not equal. Wherein, the cross-sectional area of the exhaust passage of the annular side wall B refers to the cross-sectional area of the cross section of the exhaust passage. The bottom side of the annular side wall B may be formed with a step B in the lower narrow width; or the cross-sectional area of the exhaust side of the annular side wall B may be gradually reduced from the top to the bottom; When the excess liquid is poured, the liquid in the test tube can be prevented from being poured out of the exhaust passage of the liquid take-off member. The step B may be located at an upper portion of the annular side wall B or at a lower portion of the annular side wall B.

In the above solution, the upper opening B of the annular side wall B is far from the flow of liquid into the upper opening A of the annular side wall A, and the probability of liquid entering the upper opening B during the liquid taking process is reduced.

The invention has the following advantages:

1. Due to the use of a straight exhaust passage, the present invention reduces the mechanism and reduces the preparation cost of the mold compared to the prior art mold structure, and the technical cost of the present invention is reduced by about the cost of the prior art mold. 15%.

2. In the present invention, since the exhaust passage adopts the edge and straight tubular structure, the production molding time is reduced by one step compared with the prior art, and the processing time is shortened, and the processing time of the present invention is shortened by about 10% compared with the prior art.

3. The number of molds that can be opened on the same mold in the present invention (0.16 cubic meters), compared with the number of molds that can be opened in the same volume, the present invention can open six, and the prior art can only open four, and the number of molds of the present invention can be opened. 50% more than the prior art.

4. Since the annular side wall B (exhaust passage) is close to the annular side wall A, the probability of liquid blocking the outlet B under the exhaust passage is reduced.

5. The cross section of the exhaust passage of the present invention is elliptical, and the cross section of the liquid guiding passage is elliptical, which can reduce the amount of materials while ensuring the smooth drainage of the liquid and the exhaust.

6. Use the same volume of the liquid take-off piece and the test tube. The minimum cross-sectional area of the inlet port is the same, and the minimum cross-sectional area of the exhaust channel is the same. The liquid is discharged at the outlet of 5 ml per second. The time required for filling the test tube is 3S in the present invention, and the time required for filling the test tube in the prior art is about 10% shorter than that in the prior art.

DRAWINGS

Figure 1 is a top plan view of the exhaust passage of the present invention in the enclosed space of the annular side wall.

2 is a bottom plan view of the exhaust passage of the present invention in the enclosed space of the annular side wall.

Figure 3 is a schematic view of the exhaust passage of the present invention in the enclosed space of the annular side wall.

4 is a schematic view -1 of the projected outer contour N of the lower opening arm of the present invention located within the projected outer contour M of the upper opening.

Figure 5 is a schematic view - 2 of the projected outer contour N of the lower opening arm of the present invention located within the projected outer contour M of the upper opening.

Fig. 6 is a top plan view showing the exhaust passage of the present invention outside the enclosed space of the annular side wall.

Figure 7 is a bottom plan view of the exhaust passage of the present invention outside the enclosed space of the annular side wall.

Figure 8 is a schematic view of the exhaust passage of the present invention outside the enclosed space of the annular side wall.

Figure 9 is a schematic view - 1 of the projection outer contour N of the lower opening arm of the present invention intersecting the projected outer contour M of the upper opening armor.

Figure 10 is a schematic view - 2 of the projection outer contour N of the lower opening arm of the present invention intersecting the projected outer contour M of the upper opening armor.

Figure 11 is a schematic view of the guide channel of the exhaust passage of the present invention located in the enclosed space of the annular side wall.

Figure 12 is a schematic view of the flow channel of the exhaust passage of the present invention located outside the enclosed space of the annular side wall.

Figure 13 is a schematic view - 3 of the projection outer contour N of the lower opening arm of the present invention intersecting the projected outer contour M of the upper opening armor.

Figure 14 is a schematic view - 4 of the projection outer contour N of the lower opening arm of the present invention intersecting the projected outer contour M of the upper opening armor.

Figure 15 is a schematic view - 3 of the projected outer contour N of the lower opening armor in the projected outer contour M of the upper opening armor.

Figure 16 is a schematic view - 1 of the joint of the present invention.

Figure 17 is a schematic view-2 of the joint of the present invention.

Figure 18 is a schematic view-3 of the joint of the present invention.

Figure 19 is a schematic view showing the structure of the partition body of the present invention provided with a groove.

Figure 20 is a schematic view showing the structure of an embodiment of the present invention.

In the picture:

1 annular side wall A, 10 liquid guiding channel, 11 upper opening arm, 12 lower opening armor, 13 annular side wall arm upper end surface, 14 ring side wall arm lower end surface, 15 lower opening arm A projection outer contour N, 16 Projection outer contour of upper open armor M, 17 line segment A, 18 line segment B, 1a annular side wall upper part, 1b annular side wall lower part, 19a inlet port, 19b liquid outlet, 17a line section C, 18a line section D, 18b Line segment E, line 17-1, line 17-2, line 18-1, line 18-2,

2 annular side wall B, 21 exhaust passage, 22 outer contour is R, 23 is on exit B, 24 is on exit B,

3 partition body, 4 shielding body, 5 bottom sealing plate, 51 guiding surface, 52 side, 53 guiding channel, 54 blind hole, 55 groove,

6 liquid guide, 7 connection, 71 liquid through hole, 72 exhaust through hole, 73 step A, 74 step B,

711 the upper part of the liquid through hole, 712 the lower part of the liquid through hole,

The upper part of the 721 exhaust through hole, the lower part of the 722 exhaust through hole,

9 plane Q, P intersection,

The axis of the upper part of the annular side wall A, the axis of the lower part of the B-shaped side wall, the axis of the C-shaped side wall B, the axis of the D-conducting through-hole, the axis of the E-venting through-hole,

a common side wall between the flow guiding passage at the lower portion of the M-shaped side wall arm and the exhaust passage,

The vertical distance between the d1 annular side wall B and the uppermost end of the annular side wall A,

The length of the longest line segment formed by the extension line of the shortest line segment of d2 and the uppermost end of the inner edge of the annular side wall,

D3 The distance between the axis of the annular side wall A and the axis of the annular side wall B.

detailed description

The present invention is further described in the following with reference to the accompanying drawings. The following examples are merely preferred, and are not intended to limit the scope of the invention, but the purpose is to cover various modifications and equivalent arrangements in the present invention. Within the scope of the patent scope to be applied for.

Embodiment 1: The present invention will be further described below with reference to FIG. 1 to FIG. 5, FIG. 11, and FIG.

A liquid take-up member for a sealed body fluid indweller comprises an annular side wall 1 and an annular side wall B2.

The annular side wall armor 1 has an upper opening nail 11 and a lower opening nail 12. The annular side wall arm 1 includes an annular side wall upper portion 1a, a bottom sealing plate 5, and an annular side wall lower portion 1b. The annular side wall 1 is enclosed to form a flow guiding channel 10. The liquid guiding passage 10 has a liquid inlet 19a and a liquid outlet 19b. The annular side wall upper portion 1a is for collecting liquid, and the annular side wall lower portion 1b is for mating connection with the test tube, and the bottom sealing plate 5 is respectively connected to the annular side wall upper portion 1a and the annular side wall upper portion 1b. The annular side wall lower portion 1b is the connecting portion 7. The bottom sealing plate 5 is provided with a flow guiding surface 51. The flow guiding surface 51 is a long inclined surface, and the lower end of the flow guiding surface 51 is connected to the liquid guiding through hole 71 of the connecting portion 7 of the annular side wall lower portion 1b. The flow guiding surface 51 of the bottom sealing plate 5 and the side surface 52 form a flow guiding channel 53 having a potential difference.

The annular side wall B 2 encloses an exhaust passage 21 formed, and the annular side wall B 2 is a straight tubular shape.

The axis A of the upper portion of the annular side wall is parallel to the axis C of the annular side wall B. The axis A of the upper part of the annular side wall is not coincident with the axis B of the lower part of the annular side wall A, the axis A of the upper part of the annular side wall is parallel with the axis B of the lower part of the annular side wall A; the axis C of the annular side wall B and the annular side wall The axis B of the lower portion of the nail is parallel; and the axis C of the annular side wall B is away from the axis A of the upper portion of the annular side wall.

The liquid take-up member is projected downward on the plane Q9. The projection of the annular side wall B2 on the plane Q9 is the outer contour R22. A projection line N15 of the lower opening A is connected to a projection outer contour M16 of the upper opening A, which forms a line A 17 and a line segment 18 on the projected outer contour N15 of the lower opening A and the projected outer contour M16 of the upper opening A. The length of line A 17 is much larger than line 18 B. Line segment B 18 is the shortest line segment between the uppermost end of the annular side wall arm and the axially extending annular side wall B.

The length of the segment B 18 is the vertical distance d1 between the annular side wall B and the uppermost end of the annular side wall A. The upper portion of the annular side wall B is adjacent to the upper side 1a of the annular side wall, and the vertical distance d1 of the annular side wall B 2 from the annular side wall 1 is 5 mm.

The length of the longest line segment formed by the extension line of the shortest line segment intersects with the uppermost end of the inner edge of the annular side wall is 100mm, d1 is 5% of d2.

The projected outer contour N15 of the lower opening arm has an inner diameter of 13 mm and an outer diameter of 15 mm. Line B 18 is 6.25% of line segment A17. The common side wall thickness M between the flow guiding passage and the exhaust passage in the lower part of the annular side wall arm is 3 mm. Two blind holes 54 are defined in the common side wall between the flow guiding passage and the exhaust passage in the lower part of the annular side wall, and a groove 55 is formed on the partition body 3 formed by the common side wall extending downward.

The projected outer contour N15 of the lower opening A is located within the projected outer contour M16 of the upper opening A and does not intersect. The outer contour R22 is located within the projected outer contour N15 of the lower opening A.

The cross-sectional area of the flow guiding passage 10 of the connecting portion 7 at the minimum cross-sectional area is 10 mm ² , and the cross-sectional area at the smallest cross-sectional area of the exhaust passage 21 is 5 mm ² . The minimum cross-sectional area of the flow guiding channel is located at the lower part 1b of the annular side wall,

The liquid guiding passage 10 of the annular side wall lower portion 1b has an elliptical cross section, and the exhaust passage 21 has an elliptical cross section.

As can be seen from Figure 15,

The liquid take-up member is projected downward on the plane Q9. The projection of the annular side wall B2 on the plane Q9 is the outer contour R22. The projection outer contour N15 of the lower opening arm A is connected to a straight line near the projected outer contour M16 of the upper opening armor;

In the up and down direction of the annular side wall B 2: the straight line forms a line segment 17-2 and a line segment 18-2 on the projected outer contour N15 of the lower opening A and the projected outer contour M16 of the upper opening A;

In the left-right direction of the annular side wall B 2, the straight line forms a line segment 17-1 and a line segment 18-1 on the projected outer contour N15 of the lower opening A and the projected outer contour M16 of the upper opening A;

The length of the line segment 18-1, the line segment 17-2 and the line segment 18-2 are the same, and the vertical distance d1 of the annular side wall B2 from the nearest side of the annular side wall 1 is 1; the length of the line segment 17-1 is greater than the line segment 18- 1 length, length of line segment 17-2 and length of line segment 18-2.

The upper part of the annular side wall B is adjacent to the upper part of the annular side wall A, and the vertical distance d1 of the annular side wall B 2 from the uppermost end of the annular side wall 1 is 8 mm.

A straight line is connected to the annular side wall B 2 closest to the uppermost end of the annular side wall A1, and the longest line segment length d2 formed by the extension line of the shortest line segment and the uppermost end of the inner edge of the annular side wall is 120 mm, and d1 is 6.67 of d2. %.

The length of line segment 18-1 is 7.84% of the length of line segment 17-1. The common side wall thickness M between the flow guiding passage and the exhaust passage in the lower part of the annular side wall arm is 3 mm.

In the above embodiment, the liquid-conducting through-hole 71 can be provided with a step armor 73 in the liquid-conducting through-hole 71, and the cross-sectional area of the upper portion 711 of the liquid-conducting through-hole is larger than the lower portion of the liquid-conducting through-hole. 712 cross section Face cross-sectional area. The exhaust through hole 72 has a truncated cone shape, and the cross sectional area of the exhaust through hole gradually decreases from the top to the bottom. The cross section of the lower portion 712 of the liquid guiding through hole is larger than the cross sectional area of the cross section of the exhaust through hole 72.

The liquid-conducting through-hole 71 may be provided with a step armor 73 in the liquid-conducting through-hole 71, and a cross-sectional area of the lower portion 712 of the liquid-conducting through-hole is larger than a cross-sectional area of the upper portion 711 of the liquid-conducting through-hole. The exhaust through hole 72 has a truncated cone shape, and the cross sectional area of the exhaust through hole gradually decreases from the top to the bottom. The cross-sectional area of the upper portion 711 of the liquid-conducting through-hole is larger than the cross-sectional area of the cross-section of the exhaust through-hole 72.

As shown in FIG. 18, the liquid-conducting through-hole 71 may be provided with a step armor 73 in the liquid-conducting through-hole 71, and a cross-sectional area of the lower portion 712 of the liquid-conducting through-hole is larger than a cross-sectional area of the upper portion 711 of the liquid-conducting through-hole. A step B 74 is provided in the exhaust through hole 72, and a cross-sectional area of the upper portion 721 of the exhaust through hole is larger than a cross-sectional area of the lower portion 722 of the exhaust through hole. The cross-sectional area of the upper portion 711 of the liquid-conducting through-hole is larger than the cross-sectional area of the lower portion 722 of the exhaust through-hole.

Embodiment 2: The present invention will be further described below with reference to FIG. 6 to FIG. 10 and FIG.

The annular side wall armor 1 has an upper opening nail 11 and a lower opening nail 12. The annular side wall arm 1 includes an annular side wall upper portion 1a, a bottom sealing plate 5, and an annular side wall lower portion 1b. The annular side wall 1 is enclosed to form a flow guiding channel 10. The liquid guiding passage 10 has a liquid inlet 19a and a liquid outlet 19b. The annular side wall upper portion 1a is for collecting liquid, and the annular side wall lower portion 1b is for mating connection with the test tube, and the bottom sealing plate 5 is respectively connected to the annular side wall upper portion 1a and the annular side wall upper portion 1b. The annular side wall lower portion 1b is the connecting portion 7. The bottom sealing plate 5 is provided with a flow guiding surface 51. The flow guiding surface 51 is an elongated inclined surface, and the lower end of the flow guiding surface 51 is connected to the liquid guiding through hole 71 of the connecting portion 7 of the annular side wall lower portion 1b. The flow guiding surface 51 of the bottom sealing plate 5 and the side surface 52 form a flow guiding channel 53 having a potential difference.

The liquid take-up member is projected downward on the plane Q9. The projected outer contour N15 of the lower opening A intersects the projected outer contour M16 of the upper opening A, and the intersection is P. The projection of the annular side wall B2 on the plane Q9 is the outer contour R22. The outer contour R22 is located within the projected outer contour N15 of the lower opening A.

The projection outer contour N15 of the lower opening arm A is connected with a projected outer contour M16 of the upper opening arm A, which forms a line segment C17 and a line segment on the projection outer contour N15 of the lower opening arm A and the projection outer contour M16 of the upper opening armor. 18a and line segment 18b. Line segment C17a and segment D1a line segment are listed on both sides of the intersection P. The line segment 18b is located in the intersection P.

The length of the line C37a is much larger than the line segment 18b and the line segment 18a. The length of the line segment 18b is greater than the length of the segment 18a. The shortest line segment is the line segment D18a.

The vertical distance of the annular side wall B 2 from the nearest point of the annular side wall 1 is d1, and d1 is the length of the line segment 18a. The vertical distance d1 of the annular side wall B 2 from the annular side wall 1 is 6 mm.

The length of the longest line formed by the extension of the shortest line intersecting the uppermost end of the inner edge of the annular side wall is d2 is 80 mm, and d1 is 7.5% of d2.

The projected outer contour N15 of the lower opening arm has an inner diameter of 13 mm and an outer diameter of 15 mm. Line B 18 is 10.17% of line segment A17. The common side wall thickness M between the flow guiding passage and the exhaust passage in the lower part of the annular side wall arm is 3.5 mm.

The cross-sectional area of the flow guiding passage 10 of the connecting portion 7 at the minimum cross-sectional area is 10 mm ² , and the cross-sectional area at the smallest cross-sectional area of the exhaust passage 21 is 5 mm ² . The minimum cross-sectional area of the flow guiding channel is located at the lower portion 1b of the annular side wall.

Embodiment 3: The present invention will be further described below with reference to FIG. 6, FIG. 7, FIG. 8, FIG. 12, FIG. 13, and FIG.

The axis A of the upper portion of the annular side wall is parallel to the axis C of the annular side wall B. Axis of the upper part of the annular side wall A does not coincide with the axis B of the lower portion of the annular side wall A, the axis A of the upper portion of the annular side wall is parallel with the axis B of the lower portion of the annular side wall; the axis C of the annular side wall B is parallel to the axis B of the lower portion of the annular side wall; And the axis C of the annular side wall B is away from the axis A of the upper part of the annular side wall A.

The length of the segment 18a is greater than the length of the segment 18b. The length of the line C17a is much larger than the line length 18b. The line segment 18b is the shortest line segment.

The vertical distance of the annular side wall B 2 from the nearest point of the annular side wall 1 is d1, and d1 is the length of the line segment 18b. The vertical distance d1 of the annular side wall B 2 from the annular side wall 1 is 6 mm.

Embodiment 4: The present invention will be further described below with reference to FIG. 19 and FIG. 20:

The annular side wall arm 1 includes an annular side wall upper portion 1a, a bottom sealing plate 5, and an annular side wall lower portion 1b. The annular side wall 1 is enclosed to form a flow guiding channel 10. The annular side wall armor 1 has an upper opening nail 11 and a lower opening nail 12. The annular side wall upper portion 1a is for collecting liquid, and the annular side wall lower portion 1b is for mating connection with the test tube, and the bottom sealing plate 5 is respectively connected to the annular side wall upper portion 1a and the annular side wall upper portion 1b. Ring side wall armor 1b is connected Connection 7. The bottom sealing plate 5 is provided with a flow guiding surface 51. The flow guiding surface 51 is a sloped surface, and the lower end of the flow guiding surface 51 is connected to the liquid guiding through hole 71 of the connecting portion 7 of the annular side wall lower portion 1b.

The annular side wall B 2 encloses an exhaust passage 21 formed, and the annular side wall B 2 is a straight tubular shape. The annular side wall B2 is located in the flow guiding channel 10 formed by the annular side wall 1 .

The axis A of the upper portion of the annular side wall is parallel to the axis C of the annular side wall B. The axis A of the upper portion of the annular side wall is coincident with the axis B of the lower portion of the annular side wall; the axis C of the annular side wall B is parallel to the axis B of the lower portion of the annular side wall.

The common side wall thickness M between the flow guiding passage and the exhaust passage in the lower part of the annular side wall arm is 3.5 mm.

The minimum cross-sectional area of the flow guiding passage is the liquid outlet 19b of the connecting portion 7, and the liquid outlet 19b communicates with the upper portion 711 of the liquid-conducting through-hole and has the same cross-sectional area.

The cross-sectional area of the upper portion 711 of the liquid-conducting through-hole is larger than the cross-sectional area of the lower portion 712 of the liquid-conducting through-hole, and the step portion 73 is formed at the joint between the upper portion 711 of the liquid-conducting through-hole and the lower portion 712 of the liquid-conducting through-hole A step arm 73 is provided in the flow guiding passage 10 of the connecting portion 7.

A step B 74 is provided in the exhaust through hole 72 of the connecting portion 7. The cross-sectional area of the upper portion 721 of the exhaust through-hole is smaller than the cross-sectional area of the lower portion 722 of the exhaust through-hole, and the upper portion 721 of the exhaust through-hole and the lower portion 722 of the exhaust through-hole form a step B 74.

The cross-sectional area of the flow guiding passage 10 of the connecting portion 7 at the minimum cross-sectional area is 10 mm ² , and the cross-sectional area at the smallest cross-sectional area of the exhaust passage 21 is 5 mm ² . The cross-sectional area of the exhaust passage 21 is the smallest at the upper outlet B23.

The minimum cross-sectional area of the flow guiding channel is located at the lower portion 1b of the annular side wall.

The liquid guiding passage 10 of the annular side wall lower portion 1b has a semicircular cross section, and the exhaust passage 21 has a semicircular cross section.

Claims

The utility model relates to a liquid take-up member for a closed body fluid indwelling device, comprising: an annular side wall armor and an annular side wall B; a flow guiding channel formed by the annular side wall arm, and an exhaust passage formed by the annular side wall B; characterized in that: The upper portion of the annular side wall B is not connected to the annular side wall A, and the minimum cross-sectional area of the flow guiding channel is greater than or equal to 3 mm 2 and less than or equal to 15 mm 2 ; the minimum cross-sectional area of the exhaust passage is greater than or equal to 3 mm 2 and less than or equal to 15 mm. 2 .
A liquid take-off member for a sealed body fluid indwelling device according to claim 1, wherein said annular side wall B is a straight tubular shape, and a lower portion of the annular side wall arm and a lower portion of the annular side wall B have a common side wall.
The liquid take-up member for a sealed body fluid indwelling device according to claim 2, wherein the annular side wall arm comprises an upper portion of the annular side wall arm, a bottom sealing plate and a lower portion of the annular side wall; Above the bottom sealing plate, the lower part of the annular side wall is located below the bottom sealing plate; the lower part of the annular side wall B is located in the lower opening A; the upper part of the annular side wall B is adjacent to the upper part of the annular side wall A; Connecting, from the uppermost end of the annular side wall A, a shortest line segment perpendicular to the annular side wall B or the axially extending annular side wall B, the shortest line length being no longer than the extension line of the shortest line segment or parallel to the shortest line segment The line is 35% of the length of the longest line formed by the intersection of the uppermost end of the inner edge of the annular side wall.
The liquid take-off member for a sealed body fluid indwelling device according to claim 4, wherein the shortest line segment length is not more than 25% of the length of the longest line segment.
The liquid take-up member for a sealed body fluid indwelling device according to claim 2, wherein the liquid take-up member is projected downward on the plane Q, the projected outer contour N of the lower opening of the annular side wall armor and the annular side wall The projection outer contour M of the upper opening of the nail is connected to the straight line in the near and far direction. In the up-down direction or the left-right direction of the projection outer contour N, the straight line forms at least two between the projection outer contour N and the projection outer contour M. Line segments A and B segments of unequal length; the projected outer contour R of the annular sidewall B is located within the projected outer contour N, the projected outer contour N being located within the projected outer contour M and not intersecting.
The liquid take-up member for a sealed body fluid indwelling device according to claim 6, wherein the line segment B is a line connecting the projected outer contour N and the projected outer contour M, and the line segment B is not larger than the line segment. 45% of A.
The liquid-removing member for a sealed body fluid indwelling device according to claim 2, wherein a distance between an axis of the annular side wall arm A and an axis of the annular side wall B is 10 mm or more and 50 mm or less.
The liquid take-off member for a sealed body fluid indwelling device according to claim 2, wherein a distance between the annular side wall B and the annular side wall arm A is not more than 20 mm.
The liquid take-up member for a sealed body fluid indwelling device according to claim 2, wherein the upper opening B of the annular side wall B is away from the flow of the liquid into the upper opening of the annular side wall A, thereby reducing the liquid during the liquid taking process. The probability of entering the upper opening B.
The liquid take-up member for a sealed body fluid indwelling device according to claim 2, wherein an upper portion of the annular side wall is used for collecting liquid, and a lower portion of the annular side wall is for engaging with the test tube, and the axis of the annular side wall B is The axis of the lower portion of the annular side wall is parallel.
The liquid take-up member for a sealed body fluid indwelling device according to claim 11, wherein an axis of the upper portion of the annular side wall is not coincident with an axis of the lower portion of the annular side wall, and an axis of the annular side wall B is away from the axis The axis of the upper part of the annular side wall.
The liquid take-off member for a sealed body fluid indwelling device according to any one of claims 1 to 12, wherein the common side wall has a wall thickness of 0.3 mm or more and 5 mm or less.
The liquid take-off member for a sealed body fluid indwelling device according to any one of claims 1 to 13, wherein the common side wall is provided with an axial groove.
The liquid take-off member for a sealed body fluid indwelling device according to any one of claims 1 to 14, wherein the common side wall is provided with an axial blind hole.
The liquid take-off member for a sealed body fluid indwelling device according to any one of claims 1 to 15, wherein the minimum cross-sectional area of the exhaust passage is smaller than the minimum cross-sectional area of the flow guiding passage.
The liquid take-off member for a sealed body fluid indwelling device according to any one of claims 1 to 16, characterized in that the cross-sectional area of the flow guiding channel at least part of the annular side wall armor is not equal.
The liquid take-off member for a sealed body fluid indwelling device according to claim 17, wherein a stepped armor is disposed in the flow guiding passage of the lower portion of the annular side wall arm.
The liquid take-off member for a sealed body fluid indwelling device according to any one of claims 1 to 16, characterized in that the cross-sectional area of the exhaust passage of at least part of the annular side wall B is unequal.
The liquid take-off member for a sealed body fluid indwelling device according to claim 19, wherein the annular passage B has an exhaust passage narrower and wider to form a step B.
The liquid take-off member for a sealed body fluid indwelling device according to claim 19, wherein the cross-sectional area of the exhaust passage of the annular side wall B is gradually reduced from top to bottom.
The liquid take-off member for a sealed body fluid indwelling device according to any one of claims 1 to 21, wherein the bottom sealing plate is provided with a flow guiding surface, the flow guiding surface comprising at least one inclined surface, and the flow guiding surface is low One end is connected to the flow guiding channel at the lower part of the annular side wall.
The liquid take-off member for a sealed body fluid indwelling device according to claim 22, wherein the flow guiding surface and the side surface of the bottom sealing plate form a flow guiding channel having a potential difference.
The liquid take-off member for a sealed body fluid indwelling device according to any one of claims 1 to 23, wherein at least a portion of the lower portion of the liquid guiding passage and/or at least a portion of the exhaust passage has an elliptical cross section.
The liquid take-off member for a sealed body fluid indwelling device according to any one of claims 1 to 23, wherein an upper portion of the annular side wall B is located at a center of the annular side wall armor.
The liquid take-off member for a sealed body fluid indwelling device according to any one of claims 1 to 24, wherein the exhaust passage is located in an enclosed space of the annular side wall A.
The liquid take-off member for a sealed body fluid indwelling device according to any one of claims 1 to 23, wherein the exhaust passage is located outside the enclosed space of the annular side wall A.