CN219353971U - Endocrine collection device - Google Patents

Abstract

The utility model relates to an endocrine collection device, which comprises a collection cavity, wherein a suction part for providing suction force is arranged between two vertical ends of the collection cavity. The suction part is embedded into the collecting cavity and comprises an isolation cavity and a telescopic cavity. Be equipped with the first trompil that is used for gaseous flow between isolated chamber and the flexible chamber, isolated chamber and collection chamber are equipped with the second trompil that is used for gaseous flow, and the collection chamber still is equipped with and runs through the collecting pipe to the vertical lower direction of collection chamber by vertical upper direction, and collection chamber vertical lower extreme is arranged in to the opening of collecting pipe. This application is through collecting the chamber and embedding collecting the suction part in the chamber, simplifies patient's respiratory tract endocrine's collection work, and the endocrine liquid in the patient's respiratory tract is absorbed through pressing the mode that suction part produced the suction, and implementation mode is simple, and the suction is reliable, has effectively improved medical staff's work efficiency. The embedded design of the collecting cavity and the suction part can also increase the portability of the device, and can be applied to different medical environments.

Description

Endocrine collection device

Technical Field

The utility model relates to the technical field of medical instruments, in particular to an endocrine collection device.

Background

At present, because various respiratory diseases are extremely easy to occur in respiratory tract, medical staff often needs to sample and test endocrine fluid of a patient, currently, an injection cylinder is generally used for puncturing and extracting endocrine fluid or the endocrine fluid of the respiratory tract is spitted into a collecting cavity by the patient or sucked by a cannula so as to collect and test, but the operation of the modes is inconvenient, the working difficulty of the medical staff is high, enough detection quantity is difficult to take out when the respiratory tract of the patient is dry, and discomfort of the patient is easily caused. The existing extraction device is huge in size and complex in structure, is not beneficial to the extraction of endocrine hydrops by medical staff, and can extract by two or more medical staff in cooperation, so that a great amount of time and cost are wasted, the problem that excessive hydrops or excessive suction force are extracted in the body of a patient frequently occurs due to improper cooperation, the patient is difficult to bear, and the patient is seriously uncomfortable and even endangers the physical health of the patient. Even if the medical staff is silently matched with the patient, the patient is injured if the patient is not silently matched with the medical staff.

In addition, the structure of the device for sucking endocrine fluid through the cannula is complex, and the device cannot be applied to various medical scenes, cannot be carried about and has no portability. For example, when the patient needs to collect endocrine fluid, the patient is often required to go to the corresponding department by himself, and the endocrine fluid of the patient is difficult to detect in time due to the fact that the detection time is greatly prolonged due to the fact that the endocrine fluid is collected by the large-size extraction device. In this respect, there is an urgent need for an endocrine collection apparatus that is convenient to aspirate and can be used in a portable manner.

Chinese patent CN211460294U discloses an endocrine hydrops sampling device, which comprises a main body, the top fixedly connected with baffle of main part, baffle sliding connection has the pull rod, the top fixedly connected with pull block of pull rod, the one end fixedly connected with piston of pull block is kept away from to the pull rod, piston and the inner wall in close contact with of main part, the bottom fixedly connected with connecting pipe of main part, the surface of connecting pipe is provided with the check valve, the sleeve has been cup jointed to the bottom of connecting pipe, telescopic bottom fixedly connected with needle tubing, the lateral wall fixedly connected with link of main part, the main part passes through link fixedly connected with collection frame, and this patent relates to medical instrument technical field. This endocrine hydrops sampling device has reached directly sending into the endocrine liquid and has collected the frame in, need not pass through the transfer again, avoids the air to cause the transfer to pollute, improves the detection accuracy, satisfies the purpose of user demand. However, the defect of the patent is that the structure is complex, and each component is externally connected with the device, so that the device is extremely easy to damage and inconvenient to transport and carry.

Chinese patent CN209884208U discloses a device for detecting and extracting effusion in endocrinology department, which comprises an extracting tube, a soft straw arranged at one end of the extracting tube, a negative pressure device arranged at the other end of the extracting tube and communicated with the extracting tube, a detecting liquid collecting bottle arranged on the extracting tube and close to one end of the soft straw and communicated with the extracting tube, and a effusion bag arranged on the extracting tube and communicated with the extracting tube, wherein a first branch tube communicated with the extracting tube is arranged on the extracting tube, a rubber plug is sleeved outside the first branch tube, and the detecting liquid collecting bottle is detachably connected with the rubber plug; the extraction pipe is provided with a second branch pipe communicated with the extraction pipe, and the second branch pipe is detachably connected with the effusion bag. However, the problems of the above patents are: the device has the same complex structure and large volume, such as a negative pressure device, a longer soft straw, a detection liquid collecting bottle, a liquid accumulation bag and the like, which are arranged by the device, and the device has large volume after being combined together, has complex structure and is difficult to carry out portable movement. When the patient needs to collect endocrine fluid, the patient needs to go to a designated place or the device is disassembled and assembled for use, and the device is not portable.

The telescopic cavity is simple in structure and simple in use method, and the suction effect is achieved only by pressing the telescopic cavity. For the patient, the suction flow can be grasped by himself without grasping complicated medical knowledge. For example, chinese patent CN216148101U discloses an endocrine liquid collection structure for respiratory medicine, and relates to the technical field of medical appliances. The patent comprises a collecting cup, wherein an extension sleeve matched with an inner cavity of the collecting cup is fixed on the top end surface of the collecting cup through a bolt, an upper end cover which extends into the extension sleeve and is matched with the extension sleeve is fixed on the top of the extension sleeve through a bolt, and a telescopic rubber sleeve is fixed on the top end surface of the extension sleeve through the upper end cover; the top of the telescopic rubber sleeve is penetrated with a liquid adsorption pipe, and the bottom end of the liquid adsorption pipe penetrates through the upper end cover and extends into the extension sleeve. This patent can be with the work of sampling respiratory tract endocrine liquid by oneself accomplish to patient, and patient can utilize endocrine liquid to collect the structure and absorb sufficient endocrine liquid according to the condition of oneself health, can try on one's own condition of control when absorbing, reduces the risk that causes the damage to patient's respiratory tract, the discomfort when reducing the sample. Thus, a part of the work of endocrine collection is given to the patient, so that the patient can use the device by himself or herself to a certain extent. However, the patent has the defects of overlarge volume and inconvenient use, and collected endocrine fluid easily flows back into the extension sleeve, the telescopic rubber sleeve and the liquid adsorption tube, so that normal respiration of a patient is affected. The telescopic rubber sleeve of the patent is also unreasonable in position and is difficult for a patient to press.

Furthermore, there are differences in one aspect due to understanding to those skilled in the art; on the other hand, as the inventors studied numerous documents and patents while the present utility model was made, the text is not limited to details and contents of all that are listed, but it is by no means the present utility model does not have these prior art features, the present utility model has all the prior art features, and the applicant remains in the background art to which the rights of the related prior art are added.

Disclosure of Invention

Aiming at the defects of the prior art, the technical scheme of the utility model provides an endocrine collection device which at least comprises a collection cavity, wherein a suction part for providing suction force is arranged between two vertical ends of the collection cavity. The suction part is embedded into the collecting cavity, the suction part comprises an isolation cavity in contact with the vertical upper end of the collecting cavity and a telescopic cavity in contact with the vertical lower end of the collecting cavity, at least one first opening for gas flow is arranged between the isolation cavity and the telescopic cavity, a second opening for gas flow is arranged between the isolation cavity and the collecting cavity, the collecting cavity is further provided with a collecting pipe which penetrates through the collecting cavity from the vertical upper direction to the vertical lower direction of the collecting cavity, and an opening of the collecting pipe is arranged at the vertical lower end of the collecting cavity.

According to a preferred embodiment, the telescopic cavity is formed by a telescopic sleeve embedded in the collecting cavity along the arc side surface of the collecting cavity, and a plurality of supporting springs are arranged between the telescopic sleeve and the collecting cavity.

According to a preferred embodiment, the connection part of the collecting cavity and the telescopic cavity is in an arc-shaped structure. The telescopic cavity is smoothly connected to the collecting cavity through an arc surface structure so as to adjust the gravity center of the collecting cavity to be kept on a vertical axis.

According to a preferred embodiment, the insulating chamber and the collecting chamber are separated by a partition through which the second opening penetrates. Wherein the isolating cavity and the telescopic cavity are separated by the wall surface of the collecting cavity. The first opening penetrates through the wall surface of the collecting cavity.

According to a preferred embodiment, a valve member is provided at the opening of the collecting tube to prevent the return flow of the collecting liquid in the collecting chamber into the collecting tube. The collecting pipe is provided with a flaring matched with the floating ball at the opening so that the floating ball is meshed with the collecting pipe. The valve member is press-fitted in the collection chamber. The valve member is provided with a side port communicated with the inside of the collecting cavity. The side port is arranged at a height lower than the height of the opening of the collecting pipe.

According to a preferred embodiment, the tangential plane of the partition of the insulating chamber intersects the vertical axis of the collecting chamber and forms a first angle.

According to a preferred embodiment, the vertical bottom end of the collecting chamber is provided with a fixing plate for fixing the collecting chamber.

According to a preferred embodiment, the telescopic sleeve is provided with a vent hole in a penetrating way towards a direction away from the collecting cavity, and the vent hole is connected with a one-way valve.

According to a preferred embodiment, the vertical upper part of the collecting tube extending out of the collecting chamber is provided with a pallet, which is connected to the collecting tube. The support plate is at least divided into a first part and a second part, the first part and the second part are fixed on the collecting pipe through an adjusting shaft body, and the adjusting shaft body is used for adjusting the opening and closing degree of the first part and the second part.

According to a preferred embodiment, the inner cambered surface of the supporting plate, which is far away from the collecting cavity, is provided with an elastic layer.

The beneficial technical effects of the utility model are as follows:

this application is through collecting the chamber and embedding collecting the suction part in the chamber, simplifies patient's respiratory tract endocrine's collection work, and medical staff presses flexible chamber in order to discharge the inside air in flexible chamber to produce flexible chamber and external inside and outside air pressure difference from this. Loosening the telescopic cavity, automatically sucking air in the collecting cavity by the telescopic cavity under the action of the telescopic sleeve and the spring to restore the original state, and collecting endocrine fluid in the respiratory tract of a patient into the collecting cavity through the collecting pipe connected with the collecting cavity. The endocrine fluid in the respiratory tract of the patient is sucked by pressing the suction part to generate suction, the realization mode is simple, the suction is reliable, and the working efficiency of medical staff is effectively improved. The embedded design of the collecting cavity and the suction part can also increase the portability of the device, and can be applied to different medical environments. In addition, the simplified design also allows for the task of collecting the endocrine fluid of the respiratory tract to be assigned to the patient, who is able to perform a proper and gentle collection according to his own experience, for example controlling the degree of compression of the telescopic lumen and the depth of insertion of the collection tube. Compared with the prior art, the collecting mode through medical staff can better care the feeling of the patient through the self-collecting of the patient, and the patient can reduce the damage to the respiratory tract of the patient and the uncomfortable feeling of the patient by using the self-feeling suitable suction force and frequency to collect endocrine liquid.

Drawings

FIG. 1 is a schematic view of the structure of a preferred embodiment of an endocrine collection apparatus of the present utility model;

fig. 2 is a schematic structural view of a preferred embodiment of the endocrine collection apparatus of the present utility model in a pressed state.

List of reference numerals

1: a collection chamber; 2: a suction portion; 3: isolating the cavity; 4: a telescopic chamber; 5: a first opening; 6: a second opening; 7: a collection pipe; 8: a telescopic sleeve; 9: a support spring; 10: a partition plate; 11: a valve member; 12: a floating ball; 13: a side port; 14: a fixed plate; 15: a one-way valve; 16: a supporting plate; 17: a first portion; 18: a second portion; 19: adjusting the shaft body; 20: an elastic layer.

Detailed Description

The following detailed description refers to the accompanying drawings.

Example 1

The application relates to an endocrine collection device, at least, including collecting chamber 1, be equipped with the suction part 2 that is used for providing suction between the vertical both ends of collecting chamber 1. The suction part 2 is embedded into the collecting cavity 1, the suction part 2 comprises an isolation cavity 3 contacted with the vertical upper end of the collecting cavity 1 and a telescopic cavity 4 contacted with the vertical lower end of the collecting cavity 1, at least one first opening 5 for gas flow is arranged between the isolation cavity 3 and the telescopic cavity 4, the isolation cavity 3 and the collecting cavity 1 are provided with second openings 6 for gas flow, the collecting cavity 1 is further provided with a collecting pipe 7 penetrating through the vertical upper direction to the vertical lower direction of the collecting cavity 1, and an opening of the collecting pipe 7 is arranged at the vertical lower end of the collecting cavity 1. Preferably, the telescopic cavity 4 can automatically return to the original state after being pressed, and the air in the collecting cavity 1 can be automatically sucked after the air in the telescopic cavity 4 is discharged so as to return to the original position. This application is through collecting chamber 1 and embedding collecting chamber 1 in suction part 2, simplifies the collection work of patient's respiratory tract endocrine, through pressing the endocrine liquid in the patient's respiratory tract of the mode of suction part 2 production suction of pressing, realization mode is simple, and the suction is reliable, has effectively improved medical staff's work efficiency. The embedded design of the collecting chamber 1 and the suction part 2 can also increase the portability of the device, and can be applied to different medical environments. In addition, the simplified design can also distribute the task of collecting respiratory tract endocrine fluid to the patient, and the patient can carry out suitable, gentle collection according to self impression, compares the mode of collecting through medical staff in prior art, collects the impression that can more take care of the patient through the patient himself, and the patient uses self to feel suitable suction and frequency to collect endocrine fluid can reduce the damage to patient's respiratory tract and the uncomfortable sense of patient.

According to a preferred embodiment, the telescopic chamber 4 is formed by a telescopic sleeve 8 embedded in the collecting chamber 1 along the arc side of the collecting chamber 1, a number of support springs 9 being arranged between the telescopic sleeve 8 and the collecting chamber 1. The support spring 9 can increase the restoring force of the bellows 4. Preferably, the telescopic sleeve 8 can be made of soft rubber. The telescopic sleeve 8 made of rubber can restore to the original position by itself, and the suction force to the collecting cavity 1 is ensured.

According to a preferred embodiment, the connection of the collecting chamber 1 to the telescopic chamber 4 is of cambered surface configuration. The telescopic chamber 4 is smoothly connected to the collecting chamber 1 through an arc structure to adjust the gravity center of the collecting chamber 1 to be kept on a vertical axis. The cambered surface structure can adjust the gravity center of the collecting cavity 1 to be kept on the self axis so as to increase the stability of the collecting cavity 1. In the case of the suction portion 2, the center of gravity of the collecting chamber 1 is inevitably shifted, for which purpose the center of gravity is adjusted by a smooth transition of the cambered surface structure so that it remains balanced. The suction part 2 provided by the utility model provides suction force for sucking endocrine fluid of a patient, and the upper end of the suction part is provided with the isolation cavity 3 so as to prevent the problem that the endocrine fluid is directly sucked into the telescopic cavity 4 due to the large suction force and/or too close distance to the collecting pipe 7 when the endocrine fluid is sucked. The lower end of the suction part 2 is provided with a telescopic cavity 4 for providing suction. The cambered surface structure can increase the capacity of the collecting cavity 1 for collecting endocrine liquid and adjust the problem of gravity center deviation caused by embedding the suction part 2 into the collecting cavity 1.

According to a preferred embodiment, the insulating chamber 3 and the collecting chamber 1 are separated by a partition 10, the second opening 6 extending through the partition 10. Wherein the isolating chamber 3 and the telescopic chamber 4 are separated by the wall surface of the collecting chamber 1. The first opening 5 extends through the wall of the collecting chamber 1. When collecting the endocrine fluid in the respiratory tract of a patient, the isolation cavity 3 can prevent the endocrine fluid from splashing into the telescopic cavity 4, and the interference problem is prevented.

According to a preferred embodiment, a valve member 11 is provided at the opening of the collection tube 7 to prevent the collection fluid in the collection chamber 1 from flowing back into the collection tube 7. Wherein the collecting pipe 7 is provided with a flaring at the opening adapted with the floating ball 12 so that the floating ball 12 is engaged with the collecting pipe 7. The flare can be flared to fit the ball 12. The valve member 11 is press-fitted into the collecting chamber 1. The valve member 11 is provided with a side opening 13 communicating with the interior of the collecting chamber 1. The side opening 13 is arranged at a height lower than the opening height of the collecting pipe 7, so that the endocrine fluid in the valve member 11 flows into the collecting chamber 1 through the side opening 13. The vertical bottom end of the valve member 11 is also provided with a bottom opening for allowing endocrine fluid to flow towards the bottom end of the collecting chamber 1. The floating ball 12 is made of a low-density material, when endocrine fluid is collected in the collecting cavity 1, the floating ball 12 can float on the endocrine fluid and is in sealing fit with the bell mouth of the collecting pipe 7, and therefore a connecting channel between the collecting pipe 7 and the collecting cavity 1 is closed. When the float 12 is moved into engagement with the flare of the collection tube 7, the side opening 13 allows air in the valve member 11 to escape into the collection chamber 1, thereby allowing smooth movement of the float 12. The valve member 11 also serves to prevent the backflow of gas into the collection tube 7, ensuring a unidirectional flow of gas. For example, when depressing the bellows 4 to expel air, the gas passes along the collection tube 7 into the patient's respiratory tract. Depressing the bellows chamber 4 to expel air may cause gas to flow from the collection tube 7 into the patient's respiratory tract, which may be prevented by blocking the collection tube 7 during use (e.g., manually squeezing shut off the portion of the collection tube 7 extending out of the collection chamber 1). When the valve member is used for gas flow, the floating ball can block the bell mouth of the collecting pipe 7 due to pressure difference caused by gas flowing to the side mouth of the valve member, so that gas flow is blocked, and the gas can only flow out through the one-way valve 15.

According to a preferred embodiment, the tangent plane of the partition 10 of the insulating chamber 3 intersects the vertical axis of the collecting chamber 1 and forms a first angle. The first angle may be 90 ° or a tilt angle. Preferably an oblique angle. The inclination angle is such that the endocrine liquid splashed onto the partition plate 10 of the insulating chamber 3 will slide down along the inclination angle under the action of gravity without entering into the insulating chamber 3. Preferably, the inclination angle of the first angle is also capable of being inclined toward the vertical upper end. The inclined angle to the vertical upper end can hinder the splash of the endocrine fluid, and the endocrine fluid is blocked on the collecting pipe 7 side in such a manner that a blocking wall is formed.

According to a preferred embodiment, the vertical bottom end of the collecting chamber 1 is provided with a fixing plate 14 for fixing the collecting chamber 1. The fixed tray 14 allows the collection chamber 1 to be placed in various planes without toppling.

According to a preferred embodiment, the telescopic sleeve 8 is provided with a vent hole extending therethrough in a direction away from the collecting chamber 1, the vent hole being connected with a one-way valve 15. The one-way valve 15 is used for exhausting air compressed when the telescopic cavity 4 is pressed, so that the telescopic cavity 4 and the outside generate air pressure difference, and suction force is generated when the telescopic cavity 4 is restored, so as to collect endocrine fluid in the respiratory tract of a patient.

According to a preferred embodiment, the vertically upper part of the collection tube 7 extending out of the collection chamber 1 is provided with a carrier 16, which carrier 16 is connected to the collection tube 7. The supporting plate 16 is at least divided into a first part 17 and a second part 18, the first part 17 and the second part 18 are fixed on the collecting pipe 7 through an adjusting shaft 19, and the adjusting shaft 19 is used for adjusting the opening and closing degree of the first part 17 and the second part 18. The ergonomic design of the pallet 16 makes it easy to apply to a patient. The adjusting shaft body 19 adjusts the opening and closing degree of the first portion 17 and the second portion 18 to completely fit the face of the patient, so that on one hand, endocrine fluid is prevented from splashing from the mouth of the patient, and on the other hand, discomfort of the patient is reduced.

According to a preferred embodiment, the inner arc surface of the pallet 16 remote from the collecting cavity 1 is provided with an elastic layer 20.

For ease of understanding, the principles of operation and methods of use of an endocrine collection apparatus of the present utility model will be discussed.

When the collecting tube 7 is used, the collecting tube 7 is firstly placed into the respiratory tract of a patient, and the opening and closing degree of the first part 17 and the second part 18 is adjusted through the adjusting shaft 19 so that the collecting tube completely fits the face of the patient. Then, the expansion chamber 4 is pressed to exhaust the internal air of the expansion chamber 4, and an internal-external air pressure difference is generated. Loosening the telescopic cavity 4 and collecting endocrine fluid in the respiratory tract of a patient into the collecting cavity 1 through the collecting pipe 7 under the action of the telescopic sleeve 8 and the spring.

Throughout this document, the word "preferably" is used in a generic sense to mean only one alternative, and not to be construed as necessarily required, so that the applicant reserves the right to forego or delete the relevant preferred feature at any time.

It should be noted that the above-described embodiments are exemplary, and that a person skilled in the art, in light of the present disclosure, may devise various solutions that fall within the scope of the present disclosure and fall within the scope of the present disclosure. It should be understood by those skilled in the art that the present description and drawings are illustrative and not limiting to the claims. The scope of the utility model is defined by the claims and their equivalents.

Claims (10)

1. An endocrine collection device at least comprises a collection cavity (1) for collecting endocrine fluid of a patient, and is characterized in that a suction part (2) for providing suction force is arranged between two vertical ends of the collection cavity (1),

the utility model discloses a collection chamber, collection chamber (1) is equipped with collection chamber (1), suction part (2) embedding collection chamber (1), suction part (2) include with collection chamber (1) vertical upper end contact isolated chamber (3) and with collection chamber (1) vertical lower extreme contact flexible chamber (4), be equipped with at least one first trompil (5) that are used for gaseous flow between isolated chamber (3) and flexible chamber (4), isolated chamber (3) are equipped with second trompil (6) that are used for gaseous flow with collection chamber (1), collection chamber (1) still are equipped with by vertical upper direction run through extremely collection chamber (1) vertical lower extreme collection pipe (7), the opening of collection pipe (7) is arranged in collection chamber (1) vertical lower extreme.

2. Endocrine collection device according to claim 1, characterized in that the telescopic chamber (4) is formed by a telescopic sleeve (8) embedded in the collection chamber (1) along the arc side of the collection chamber (1), a number of support springs (9) being arranged between the telescopic sleeve (8) and the collection chamber (1).

3. Endocrine collection device according to claim 2, characterized in that the connection of the collection chamber (1) with the telescopic chamber (4) is of a cambered surface structure, by means of which the telescopic chamber (4) is smoothly connected to the collection chamber (1) to adjust the centre of gravity of the collection chamber (1) to remain on the vertical axis.

4. The endocrine collection apparatus as claimed in claim 1, wherein the insulating chamber (3) and the collection chamber (1) are separated by a partition (10), the second opening (6) extending through the partition (10), wherein,

the isolating cavity (3) and the telescopic cavity (4) are separated by the wall surface of the collecting cavity (1), and the first opening (5) penetrates through the wall surface of the collecting cavity (1).

5. The endocrine collection apparatus as claimed in claim 1, wherein a valve element (11) is provided at the opening of the collection tube (7) to prevent the collection fluid in the collection chamber (1) from flowing back into the collection tube (7), wherein,

the collecting pipe (7) is provided with a flaring matched with the floating ball (12) at the opening part so that the floating ball (12) is meshed with the collecting pipe (7), the valve piece (11) is pressed into the collecting cavity (1), the valve piece (11) is provided with a side opening (13) communicated with the inside of the collecting cavity (1), and the side opening (13) is lower than the opening of the collecting pipe (7).

6. The endocrine collection apparatus as claimed in claim 4, characterized in that a tangential plane of the partition (10) of the insulating chamber (3) intersects the vertical axis of the collection chamber (1) and forms a first angle.

7. An endocrine collection apparatus as claimed in claim 3, characterized in that the vertical bottom end of the collection chamber (1) is provided with a fixing plate (14) for fixing the collection chamber (1).

8. Endocrine collection means as claimed in claim 2, characterized in that the telescopic sleeve (8) is provided with a vent hole extending therethrough in a direction away from the collection chamber (1), said vent hole being connected with a one-way valve (15).

9. Endocrine collection means as claimed in claim 5, characterized in that the collecting tube (7) is provided with a pallet (16) extending from the vertical upper part of the collecting chamber (1), which pallet (16) is connected to the collecting tube (7), wherein,

the supporting plate (16) is at least divided into a first part (17) and a second part (18), the first part (17) and the second part (18) are fixed on the collecting pipe (7) through an adjusting shaft body (19), and the adjusting shaft body (19) is used for adjusting the opening and closing degree of the first part (17) and the second part (18).

10. The endocrine collection apparatus as claimed in claim 9, characterized in that the intrados of the carrier (16) remote from the collection chamber (1) is provided with an elastic layer (20).