Intravenous infusion integrated connection exhaust pipe

Abstract

The utility model relates to an integrated connection exhaust pipe for intravenous infusion, belongs to the technical field of medical instruments, and solves the problem that in the prior art, when double-medicine-bottle infusion is carried out, liquid medicine is wasted due to the fact that an air outlet of a needle head is too high. The exhaust pipe comprises a first pin head, a communicating pipe, a second pin head and an exhaust pipe body. Two ends of the communicating pipe are respectively connected with the first pin head and the second pin head; the exhaust pipe is connected with the first pin head and / or the second pin head and internally communicated with the first pin head and / or the second pin head; the pin head comprises a conical pin head, an exhaust hole, a needle tube and a limiting boss; the conical needle head is of a triangular pyramid structure; the needle tube is arranged below the conical needle head; the exhaust hole is formed in the conical needle head or the needle tube; the limiting boss is arranged at the lower end of the needle tube and can limit upward displacement of the needle tube. The integrated connection exhaust pipe for intravenous infusion can be communicated with double medicine bottles, is convenient to use and can reduce waste of liquid medicine to the maximum extent.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to an integrated connecting exhaust pipe for intravenous infusion. Background Art

[0002] At present, for patients who need infusion treatment, a medicine bottle is generally hung in cooperation with an infusion tube to carry out infusion treatment for the patients; during the infusion treatment, it is often necessary to hang two medicine bottles at the same time. Therefore, an exhaust pipe needs to be connected between the two medicine bottles to realize the connection between the two and keep the air pressure inside the medicine bottle constant, so as to realize the smooth flow of the liquid medicine to the infusion tube.

[0003] However, for the existing exhaust pipe, after the needle is inserted into the medicine bottle, the needle opening is located at the tip of the needle, which causes the liquid medicine below the tip of the needle to not flow out smoothly, resulting in waste of the liquid medicine.

[0004] Therefore, the utility model provides an integrated connecting exhaust pipe for intravenous infusion, which can export the liquid medicine in the medicine bottle as thoroughly as possible on the premise of realizing the connection of multiple bottles of liquid medicine, so as to avoid waste. Content of the Utility Model

[0005] In view of the above analysis, the utility model aims to provide an integrated connecting exhaust pipe for intravenous infusion, so as to solve the problem of waste of liquid medicine caused by too high height of the air outlet hole of the needle during the infusion of two medicine bottles.

[0006] The purpose of the utility model is mainly realized by the following technical solutions:

[0007] An integrated connecting exhaust pipe for intravenous infusion, comprising: a first insertion needle, a connecting pipe, a second insertion needle and an exhaust pipe;

[0008] The first insertion needle and the second insertion needle have the same structure; both ends of the connecting pipe are respectively connected to the first insertion needle and the second insertion needle; the exhaust pipe is connected to the first insertion needle and / or the second insertion needle and is internally connected;

[0009] The first insertion needle includes: a conical needle, an exhaust hole, a needle tube and a limiting boss; the conical needle is a triangular pyramid structure; the needle tube is arranged below the conical needle;

[0010] The exhaust hole is arranged on the conical needle and communicated with the needle tube; alternatively, the exhaust hole is arranged on the needle tube and communicated with the internal channel of the needle tube;

[0011] The limiting boss is arranged at the lower end of the needle tube. When the first insertion needle or the second insertion needle is inserted into the rubber stopper of the medicine bottle, the limiting boss can limit the upward displacement of the needle tube.

[0012] Further, the diameter of the syringe tube is less than or equal to the diameter of the inscribed circle of the bottom triangle of the conical needle tip.

[0013] Further, the exhaust holes are provided on the conical needle tip, the exhaust holes are obliquely provided on three side surfaces of the conical needle tip, and the exhaust holes are located at the lower end of the conical needle tip.

[0014] Further, the exhaust holes are provided on the syringe tube, and a check platform is provided on the outer side of the syringe tube; the check platform is a triangular convex platform and is located below the conical needle tip.

[0015] Further, the check platform is a first check platform, and a gap is left between the first check platform and the conical needle tip; the exhaust holes are provided on the side surface of the syringe tube and are located above the first check platform.

[0016] Further, the exhaust holes are arranged perpendicular to the syringe tube; a plurality of exhaust holes are arranged at equal intervals in the circumferential direction of the syringe tube.

[0017] Further, the height of the gap between the first check platform and the conical needle tip is 1 mm to 2 mm.

[0018] Alternatively, the check platform is a second check platform provided at the lower end of the conical needle tip; the second check platform is connected to the bottom surface of the conical needle tip and the two are of an integral structure; the exhaust holes are provided on the second check platform and communicate with the internal channel of the syringe tube.

[0019] Further, the exhaust holes include: an annular channel, a radial channel and a vertical channel, and the inner side of the annular channel communicates with the vertical channel through the radial channel; the lower end of the vertical channel communicates with the internal channel of the syringe tube.

[0020] Further, the inner diameter of the annular channel is less than the diameter of the inscribed circle of the second check platform; the outer diameter of the annular channel is greater than the diameter of the inscribed circle of the second check platform, and the outer side of the annular channel penetrates through the outer surface of the second check platform.

[0021] The technical solution of the present utility model can at least achieve one of the following effects:

[0022] 1. The integrated intravenous infusion connecting exhaust pipe of the present utility model arranges the exhaust holes on the side surface of the conical needle tip or in the gap between the conical needle tip and the first check platform, or inside the second check platform, which can reduce the distance between the exhaust holes and the inner surface of the rubber stopper of the medicine bottle and reduce the waste of the liquid medicine.

[0023] 2. The exhaust pipe integrally connected to the intravenous infusion of the present utility model, compared with the existing method of opening holes at the tips of needles, has the exhaust holes arranged on the sides of the first insertion needle or the second insertion needle, which can reduce the entry of rubber stopper particles generated during the puncture process into the connecting pipe or the infusion pipe, and is beneficial to maintaining the cleanliness of the liquid medicine.

[0024] 3. The exhaust pipe integrally connected to the intravenous infusion of the present utility model has the size of the conical needle slightly larger than the diameter of the needle tube or a check platform is provided, which can pull back the first insertion needle or the second insertion needle in the reverse direction after the puncture is completed, thereby reducing the height of the exhaust hole, making the position of the exhaust hole as close as possible to the surface of the rubber stopper, and being able to maximize the derivation of the liquid medicine in the medicine bottle to avoid waste of the liquid medicine; moreover, it is not easy to completely pull out the first insertion needle or the second insertion needle. At the same time, due to the small size of the first insertion needle or the second insertion needle, the gap between the needle tube and the rubber stopper can be sealed through the elastic deformation of the rubber stopper.

[0025] In the present utility model, the above technical solutions can also be combined with each other to realize more preferred combination schemes. Other features and advantages of the present utility model will be described in the subsequent specification, and some advantages can be made obvious from the specification or understood by implementing the present utility model. The purpose and other advantages of the present utility model can be realized and obtained through the content specifically pointed out in the specification and the drawings. Description of the Drawings

[0026] The drawings are only for the purpose of showing specific embodiments and are not considered to be a limitation of the present utility model. Throughout the drawings, the same reference signs represent the same components.

[0027] Figure 1 Schematic diagram of the structural composition of the exhaust pipe integrally connected to the intravenous infusion in Embodiment 1 of the present utility model

[0028] Figure 2 Schematic diagram of the structural composition of the insertion needle of the exhaust pipe integrally connected to the intravenous infusion in Embodiment 1 of the present utility model;

[0029] Figure 3 For Figure 2 Cross-sectional effect diagram of the insertion needle in

[0030] Figure 4 Schematic diagram of the structural composition of the insertion needle of the exhaust pipe integrally connected to the intravenous infusion in Embodiment 2 of the present utility model;

[0031] Figure 5 For Figure 4 Cross-sectional effect diagram of the insertion needle in

[0032] Figure 6 Schematic diagram of the structural composition of the insertion needle of the exhaust pipe integrally connected to the intravenous infusion in Embodiment 3 of the present utility model;

[0033] Figure 7 Longitudinal sectional view effect diagram of the needle tip in 6;

[0034] Figure 8 Transverse sectional view effect diagram of the needle tip in 6.

[0035] Reference numerals:

[0036] 1 - First needle tip; 2 - Connecting tube; 3 - Second needle tip; 4 - Exhaust pipe;

[0037] 101 - Conical needle tip; 102 - Exhaust hole; 103 - Needle tube; 104 - Limiting boss; 105 - First check valve platform; 106 - Second check valve platform; 1021 - Annular channel; 1022 - Radial channel; 1023 - Vertical channel. Detailed implementation manners

[0038] The following will specifically describe the preferred embodiments of the present invention with reference to the accompanying drawings. Among them, the accompanying drawings form a part of the present invention and are used together with the embodiments of the present invention to explain the principle of the present invention, rather than to limit the scope of the present invention.

[0039] Embodiment 1

[0040] A specific embodiment of the present invention, as Figure 1 , Figure 2 , Figure 3 shown, provides an integrated connection exhaust pipe for intravenous infusion, including: a first needle tip 1, a connecting tube 2, a second needle tip 3, and an exhaust pipe 4; both ends of the connecting tube 2 are respectively connected to the first needle tip 1 and the second needle tip 3; the exhaust pipe 4 is connected to the first needle tip 1 and / or the second needle tip 3 and is internally connected.

[0041] Furthermore, an integrated connection exhaust pipe for intravenous infusion of the present invention can be used independently. As a connecting tube, it can be used to connect two bottles of liquid medicines (one high and one low), and then an infusion tube can be installed on the rubber stopper of one of the medicine bottles to perform infusion; or an integrated connection exhaust pipe for intravenous infusion of the present invention can be used in cooperation with an infusion tube, and the upper catheter of the infusion tube is connected to the first needle tip 1, the connecting tube 2, or the second needle tip 3, so as to enable simultaneous infusion of two bottles of liquid medicines.

[0042] Furthermore, as Figure 1 shown, the structures of the first needle tip 1 and the second needle tip 3 are the same; in this embodiment, the structures of the first needle tip 1 and the second needle tip 3 are the same. Hereinafter, the specific structure of the needle tip will be explained by taking the first needle tip 1 as an example:

[0043] In a specific implementation manner of the present invention, as Figure 2 ,Figure 3 As shown in the figure, the first insertion needle head 1 includes: a conical needle head 101, an exhaust hole 102, a needle tube 103, and a limiting boss 104; the conical needle head 101 has a triangular pyramid structure; the needle tube 103 is disposed below the conical needle head 101.

[0044] Furthermore, the exhaust hole 102 is disposed on the conical needle head 101 and communicates with the needle tube 103.

[0045] In a specific embodiment of the present invention, the diameter of the needle tube 103 is less than or equal to the diameter of the inscribed circle of the bottom triangle of the conical needle head 101.

[0046] In a specific embodiment of the present invention, as Figure 2 , Figure 3 shown, when the exhaust hole 102 is disposed on the conical needle head 101, the exhaust hole 102 is obliquely disposed on three side surfaces of the conical needle head 101, and the exhaust hole 102 is located at the lower end of the conical needle head 101.

[0047] Specifically, as Figure 3 shown, the exhaust hole 102 is obliquely downward disposed inside the conical needle head 101; preferably, in this embodiment, the included angle between the axis of the exhaust hole 102 and the axis of the needle tube 103 is 60°.

[0048] As Figure 2 shown, the limiting boss 104 is disposed at the lower end of the needle tube 103. When the first insertion needle head 1 or the second insertion needle head 3 is inserted into the rubber stopper of the medicine bottle mouth, the limiting boss 104 can limit the upward displacement of the needle tube 103.

[0049] Furthermore, the limiting boss 104 is an annular boss, and two ear pieces are symmetrically disposed on both sides, as Figure 2 shown.

[0050] During use, hold the limiting boss 104 and insert the first insertion needle head 1 or the second insertion needle head 3 into the rubber stopper of the medicine bottle mouth until the upper end surface of the limiting boss 104 contacts the outer surface of the rubber stopper. The first insertion needle head 1 or the second insertion needle head 3 cannot continue to move upward, and the connection between the insertion needle head and the medicine bottle is completed. At this time, the conical needle head 101 and the upper half of the needle tube 103 are located inside the medicine bottle. Then, the liquid medicine in the medicine bottle can enter the connecting tube 2 through the exhaust hole 102. At the same time, the exhaust pipe 4 can introduce air into the medicine bottle through the exhaust hole 102 to maintain the stability of the air pressure inside the medicine bottle.

[0051] In this embodiment, the ports of the exhaust holes 102 are arranged on three sides of the conical needle 101. After the conical needle 101 is inserted into the medicine bottle, the first insertion needle 1 or the second insertion needle 3 is pulled in the reverse direction (the downward pulling-out direction), so that the bottom surface of the conical needle 101 contacts the inner surface of the rubber stopper, and further the ports of the exhaust holes 102 are at the lowest point, realizing the minimum amount of liquid medicine being exported and avoiding waste.

[0052] Specifically, the three sides of the conical needle 101 in this embodiment can be a planar triangle or a concave arc surface, which both belong to the technical concept of the present utility model and fall within the protection scope of the present utility model.

[0053] Preferably, the outer diameter of the needle tube 103 is equal to the diameter of the inscribed circle of the bottom triangle of the conical needle 101.

[0054] Preferably, the length of the needle tube 103 is 1.5 to 2 times the thickness of the rubber stopper of the medicine bottle.

[0055] Embodiment 2

[0056] A specific embodiment of the present utility model provides an integrated connection exhaust pipe for intravenous infusion, which is improved on the basis of Embodiment 1:

[0057] In this embodiment, as Figure 4 , Figure 5 shown, the exhaust holes 102 are arranged on the needle tube 103 and communicated with the internal channel of the needle tube 103.

[0058] Specifically, when the exhaust holes 102 are arranged on the needle tube 103, a first check platform 105 is arranged on the outside of the needle tube 103; the first check platform 105 is a triangular boss and is located below the conical needle 101.

[0059] Specifically, the size of the first check platform 105 is the same as the size of the bottom surface of the conical needle 101, and the triangular upper surface of the first check platform 105 faces the triangular bottom surface of the conical needle 101, as Figure 4 shown.

[0060] Further, as Figure 4 shown, there is a gap between the first check platform 105 and the conical needle 101; preferably, the height of the gap between the first check platform 105 and the conical needle 101 is 1 mm to 2 mm.

[0061] Further, the exhaust holes 102 are arranged on the side surface of the needle tube 103 and are located above the first check platform 105.

[0062] That is to say, in this embodiment, the exhaust hole 102 is located in the gap between the conical needle head 101 and the first check platform 105.

[0063] During use, insert the first insertion needle head 1 or the second insertion needle head 3 into the rubber stopper and penetrate through the rubber stopper into the interior of the medicine bottle. After the conical needle head 101 is inserted into the medicine bottle, continue to insert until the first check platform 105 also extends into the medicine bottle. Pull back the first insertion needle head 1 or the second insertion needle head 3 in the reverse direction so that the lower surface of the first check platform 105 contacts the inner surface of the rubber stopper. At this time, the exhaust hole 102 is at the lowest point, facilitating the discharge of the liquid medicine inside the medicine bottle and avoiding waste.

[0064] Furthermore, the exhaust hole 102 is arranged perpendicular to the syringe barrel 103; as Figure 5 shown.

[0065] Furthermore, a plurality of exhaust holes 102 are arranged at equal intervals in the circumferential direction of the syringe barrel 103. Exemplarily, when two exhaust holes 102 are provided, the two exhaust holes 102 are arranged at 180° on the side surface of the syringe barrel 103; when three exhaust holes 102 are provided, the three exhaust holes 102 are arranged at intervals of 120° on the side surface of the syringe barrel 103; when four exhaust holes 102 are provided, the four exhaust holes 102 are arranged at intervals of 90° on the side surface of the syringe barrel 103.

[0066] Compared with the prior art, the technical solution provided in this embodiment has at least the following beneficial effects:

[0067] 1. In the integrated intravenous infusion connecting exhaust pipe in this embodiment, since the gap between the conical needle head 101 and the first check platform 105 is very small, during the process of inserting the first insertion needle head 1 or the second insertion needle head 3 into the rubber stopper and penetrating through the rubber stopper into the interior of the medicine bottle, the fine particles generated by the puncture of the rubber stopper will not enter the exhaust hole 102, which is beneficial to maintaining the cleanliness of the input liquid medicine.

[0068] 2. In the integrated intravenous infusion connecting exhaust pipe in this embodiment, a plurality of exhaust holes 102 are arranged on the side surface of the syringe barrel 103, which can ensure that even if the first insertion needle head 1 or the second insertion needle head 3 is in an inclined state after insertion, the liquid medicine inside the medicine bottle can be completely discharged.

[0069] Embodiment 3

[0070] A specific embodiment of the present utility model provides an integrated intravenous infusion connecting exhaust pipe, which is improved on the basis of Embodiment 2. The difference from Embodiment 2 is that:

[0071] In this embodiment, as Figure 6 , Figure 7 , Figure 8As shown, the second check valve platform 106 at the lower end of the conical needle 101; the second check valve platform 106 is connected to the bottom surface of the conical needle 101 and the two are of an integral structure; that is to say, in this embodiment, there is no gap between the conical needle 101 and the triangular check valve platform.

[0072] Further, as Figure 6 、 Figure 7 shown, the exhaust hole 102 is provided on the second check valve platform 106 and is communicated with the internal channel of the syringe barrel 103.

[0073] Preferably, the aperture of the exhaust hole 102 is 1.5 mm to 2.5 mm.

[0074] Preferably, the thickness of the second check valve platform 106 is 3 mm to 5 mm.

[0075] Further, as Figure 8 shown, the exhaust hole 102 includes: an annular channel 1021, a radial channel 1022 and a vertical channel 1023, and the inner side of the annular channel 1021 is communicated with the vertical channel 1023 through the radial channel 1022; the lower end of the vertical channel 1023 is communicated with the internal channel of the syringe barrel 103.

[0076] Specifically, as Figure 7 shown, the upper end of the vertical channel 1023 is communicated with the radial channel 1022, and the lower end is communicated with the internal channel of the syringe barrel 103.

[0077] Specifically, as Figure 8 shown, the number of the radial channels 1022 is multiple and they are circumferentially and uniformly distributed inside the annular channel 1021; preferably, the number of the radial channels 1022 is three and they are respectively arranged perpendicular to the three side surfaces of the second check valve platform 106.

[0078] Further, as Figure 8 shown, the inner diameter of the annular channel 1021 is smaller than the inscribed circle diameter of the second check valve platform 106; the outer diameter of the annular channel 1021 is larger than the inscribed circle diameter of the second check valve platform 106, and the outer side of the annular channel 1021 penetrates through the outer surface of the second check valve platform 106.

[0079] That is to say, a part of the annular channel 1021 is located inside the second check valve platform 106, and a part penetrates out from the side surface of the second check valve platform 106 to form a liquid inlet or an exhaust port (two functions of the same port), as Figure 6 、 Figure 8 shown.

[0080] In use, insert the first insertion needle head 1 or the second insertion needle head 3 into the rubber stopper and penetrate through the rubber stopper into the interior of the medicine bottle. After the conical needle head 101 is inserted into the medicine bottle, then the second check platform 106 is also inserted into the medicine bottle. Pull back the first insertion needle head 1 or the second insertion needle head 3 in the reverse direction so that the lower surface of the second check platform 106 contacts the inner surface of the rubber stopper. At this time, the distance between the exhaust hole 102 and the inner surface of the rubber stopper is the same as the distance between the exhaust hole 102 and the lower surface of the second check platform 106. The exhaust hole 102 is at the lowest point, which is convenient for the discharge of the liquid medicine inside the medicine bottle and avoids waste. Further, the liquid medicine flows through the annular channel 1021, the radial channel 1022 and the vertical channel 1023 in sequence, and finally flows into the syringe tube 103 and the connecting tube 2 or the infusion tube;

[0081] Compared with the prior art, the technical solution provided by this embodiment has at least the following beneficial effects:

[0082] 1. In this embodiment, the exhaust hole 102 is set as a combined structure composed of an annular channel 1021, a radial channel 1022 and a vertical channel 1023. During infusion, it has a filtering effect on the rubber stopper particles generated by puncturing the rubber stopper, that is, the rubber stopper particles with a large diameter will be blocked by the annular channel 1021 and / or the radial channel 1022, avoiding entering the human body with the liquid medicine or blocking the infusion tube.

[0083] 2. In this embodiment, a plurality of radial channels 1022 are arranged in the circumferential direction of the annular channel 1021 to ensure that the liquid medicine smoothly enters the interior of the syringe tube 103, and the port of the exhaust hole 102 is located on the side surface of the second check platform 106. When the second check platform 106 is pulled back to the surface of the rubber stopper, the distance between the exhaust hole 102 and the surface of the rubber stopper is very small, avoiding the residue of the liquid medicine in the medicine bottle and not wasting the liquid medicine.

[0084] The above is only a specific and preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any change or replacement that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered by the protection scope of the present invention.

Claims

1. An integrated connecting exhaust pipe for intravenous infusion, characterized in that, Comprising: A first injection needle head (1), a connecting pipe (2), a second injection needle head (3) and an exhaust pipe (4); The structures of the first injection needle head (1) and the second injection needle head (3) are the same; both ends of the connecting pipe (2) are respectively connected to the first injection needle head (1) and the second injection needle head (3); the exhaust pipe (4) is connected to the first injection needle head (1) and / or the second injection needle head (3) and is internally connected; The first injection needle head (1) includes: a conical needle head (101), an exhaust hole (102), a needle tube (103) and a limiting boss (104); the conical needle head (101) is a triangular pyramid structure; the needle tube (103) is arranged below the conical needle head (101); The exhaust hole (102) is arranged on the conical needle head (101) and is communicated with the needle tube (103); alternatively, the exhaust hole (102) is arranged on the needle tube (103) and is communicated with the internal channel of the needle tube (103); The limiting boss (104) is arranged at the lower end of the needle tube (103). When the first injection needle head (1) or the second injection needle head (3) is inserted into the rubber stopper of the medicine bottle, the limiting boss (104) can limit the upward displacement of the needle tube (103).

2. The integrated venous infusion connecting exhaust pipe according to claim 1, wherein, The diameter of the needle tube (103) is less than or equal to the diameter of the inscribed circle of the bottom triangle of the conical needle head (101).

3. The integrated intravenous infusion connecting exhaust pipe according to claim 1 or 2, characterized in that, The exhaust hole (102) is arranged on the conical needle head (101), and the exhaust hole (102) is obliquely arranged on the three side surfaces of the conical needle head (101), and the exhaust hole (102) is located at the lower end of the conical needle head (101).

4. The integrated venous infusion connecting exhaust pipe according to claim 1 or 2, characterized in that, The exhaust hole (102) is arranged on the needle tube (103), and a check platform is arranged on the outer part of the needle tube (103); the check platform is a triangular boss and is located below the conical needle head (101).

5. The integrated venous infusion connecting exhaust pipe according to claim 4, wherein The check platform is a first check platform (105), and a gap is left between the first check platform (105) and the conical needle head (101); the exhaust hole (102) is arranged on the side surface of the needle tube (103) and is located above the first check platform (105).

6. The integrated intravenous infusion connecting exhaust pipe according to claim 5, characterized in that, The exhaust hole (102) is arranged perpendicular to the needle tube (103); a plurality of exhaust holes (102) are arranged at equal intervals in the circumferential direction of the needle tube (103).

7. The integrated venous infusion connecting exhaust pipe according to claim 6, characterized in that, The height of the gap between the first check platform (105) and the conical needle head (101) is 1 mm to 2 mm.

8. The integrated intravenous infusion connecting exhaust pipe according to claim 4, characterized in that, The check platform is a second check platform (106) arranged at the lower end of the conical needle head (101); the second check platform (106) is connected to the bottom surface of the conical needle head (101) and they are an integral structure; the exhaust hole (102) is arranged on the second check platform (106) and is communicated with the internal channel of the needle tube (103).

9. The integrated intravenous infusion connecting exhaust pipe according to claim 8, characterized in that, The exhaust hole (102) includes: an annular channel (1021), a radial channel (1022), and a vertical channel (1023). The inner side of the annular channel (1021) communicates with the vertical channel (1023) through the radial channel (1022); the lower end of the vertical channel (1023) communicates with the internal channel of the syringe (103).

10. The integrated intravenous infusion connecting exhaust pipe according to claim 9, characterized in that, The inner diameter of the inner side of the annular channel (1021) is smaller than the inscribed circle diameter of the second check platform (106); the outer diameter of the annular channel (1021) is larger than the inscribed circle diameter of the second check platform (106), and the outer side of the annular channel (1021) penetrates through the outer surface of the second check platform (106).

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