An emergency device for epilepsy patients who bite their tongue during seizures

Abstract

The application provides an emergency device for a seizure patient biting the tongue, and relates to the technical field of medical devices. The emergency device for a seizure patient biting the tongue comprises a horizontal seat, a through groove is formed in the top of the horizontal seat and penetrates to the bottom, a synchronous bidirectional moving assembly is arranged between the through groove and the horizontal seat, two movable ends of the synchronous bidirectional moving assembly are both rotationally connected with connecting rod assemblies, and the top of the two connecting rod assemblies is fixedly connected with a movable plate. By arranging the synchronous bidirectional moving assembly, the connecting rod assembly and the movable plate, continuous stepless adjustment of the distance between the upper and lower opening and closing bite plates is realized. When in use, the bite support height can be adjusted according to the size of the patient's oral cavity, the silica gel strip is in contact with the teeth, the problems of insufficient protection or excessive opening caused by the size mismatch of the fixed size device are avoided, and the universality of the device for patients of different ages and the rapid adaptation ability of the device in the emergency scene are improved.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to an emergency device for epileptic patients who bite their tongue during an attack. Background Technology

[0002] Epilepsy is a chronic neurological disorder caused by abnormal synchronous discharges of neurons in the brain, clinically manifested as recurrent, transient brain dysfunction. During a generalized tonic-clonic seizure, the patient suddenly loses consciousness, experiences sustained contraction of all skeletal muscles, and suffers from tonic spasm of the masticatory muscles leading to trismus, which can easily cause tongue biting, resulting in bleeding, swelling, or even tearing of the tongue. Simultaneously, oral secretions increase significantly during the seizure, often accompanied by frothing at the mouth and reflux of gastric contents. If not cleared promptly, these secretions can be aspirated into the airway, causing suffocation or aspiration pneumonia, seriously threatening the patient's life.

[0003] Currently, emergency devices used in clinical practice to prevent tongue biting during epileptic seizures mainly include bite blocks, tongue depressors, and upper and lower jaw stretchers. However, existing devices still have the following drawbacks: First, most existing devices are of fixed size, while epileptic patients range in age (from children to adults), with significant differences in dental arch width and tooth height. In emergency situations, it is difficult to quickly match the appropriate size; if the size is too small, the protection is insufficient, and if the size is too large, it cannot be inserted or causes excessive stretching. Second, existing devices do not have active suction and drainage mechanisms for oral secretions. Relying solely on natural drainage is insufficient to quickly remove large amounts of saliva and blood, resulting in a high risk of aspiration. Third, the devices are difficult to remove. After a seizure, the patient's jaw may still be in a tense state, and forcibly pulling them out can easily damage the teeth or cause the device to break.

[0004] To address this, we have developed a new emergency device for epileptic patients who bite their tongue during a seizure. Summary of the Invention

[0005] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides an emergency device for epileptic patients who bite their tongue during an attack. This device solves the problems of existing devices having fixed sizes that are difficult to adapt to different patients, lacking an active suction structure for oral secretions that leads to a high risk of aspiration, and being difficult to remove after an attack, which can easily cause tooth damage or device breakage.

[0006] (II) Technical Solution To achieve the above objectives, the present invention is implemented through the following technical solution: an emergency device for an epileptic patient biting their tongue, comprising a horizontal base, the top of which is provided with a through groove extending to the bottom, a synchronous bidirectional moving component being installed between the through groove and the horizontal base, and two movable ends of the synchronous bidirectional moving component being rotatably connected to a connecting rod assembly, the tops of the two connecting rod assemblies being fixedly connected to a movable plate. Two opening and closing bite plates are symmetrically fixedly connected to one side of the outer surface of each of the two movable plates. A silicone strip is fixedly embedded in the top of the top single opening and closing bite plate and the bottom of the bottom single opening and closing bite plate. Both sides of the bottom single opening and closing bite plate are fixedly connected with a strap assembly; A hollow tongue depressor is fixedly connected to one side of the bottom single opening and closing bite plate, and auxiliary extraction components are fixedly interconnected on both outer walls of the hollow tongue depressor. The hollow tongue depressor is fixedly connected to a flexible tube at its top. A cylindrical body is provided at the end of the flexible tube. A liquid inlet check valve is fixedly connected to the top of the cylindrical body, and the top of the liquid inlet check valve is fixedly connected to the flexible tube. A one-way liquid discharge assembly is fixedly connected to the top of the cylindrical body. The inner surface of the cylinder is sealed with a piston, and the bottom of the cylinder is fixedly connected to a housing. A manual reciprocating assembly is installed between the housing and the piston.

[0007] Preferably, the synchronous bidirectional movement component includes two knobs, which are respectively located at both ends of the horizontal seat. A bidirectional screw is fixedly connected between the two knobs, and the bidirectional screw completely penetrates the horizontal seat and is rotatably connected to the horizontal seat. Two sliders are symmetrically threaded on the outer surface of the bidirectional screw, and the outer walls on both sides of the sliders slide against the inner walls on both sides of the through groove.

[0008] With the above technical solution, rotating any knob can drive the two sliders on the bidirectional screw to move synchronously in opposite directions, thereby driving the movable plate to rise and fall smoothly through the connecting rod assembly, realizing stepless adjustment of the gap between the upper and lower opening and closing bite plates.

[0009] Preferably, each of the two linkage assemblies includes two linkage bodies, and the two linkage bodies are rotatably connected to the outer walls of the two sides of the slider, and the top of the two linkage bodies are rotatably connected to a connecting block, which is fixedly connected to the bottom of the movable plate.

[0010] With the above technical solution, the connecting rods on both sides swing synchronously when the slider moves, converting the horizontal displacement into the vertical displacement of the movable plate.

[0011] Preferably, each of the two opening and closing bite plates includes two cantilever arms, and the cross seat and the movable plate are respectively fixedly connected to the two adjacent cantilever arms. The ends of the two cantilever arms are jointly fixedly connected to a long strip plate, and the long strip plate is fixedly connected to a silicone strip.

[0012] Through the above technical solution, the cantilever connects the cross seat or movable plate with the long strip plate as a whole. The long strip plate provides a wider biting contact surface, which, together with the silicone strip, makes uniform contact with the teeth and disperses the biting force.

[0013] Preferably, the strap assembly includes two mounting bases, and the two mounting bases are respectively fixedly connected to one side of two adjacent cantilever arms, and the outer surfaces of the two mounting bases are jointly fixedly connected with elastic bands.

[0014] The above technical solution involves securing the elastic band around the patient's head, ensuring the device remains relatively stable during violent head movements during an epileptic seizure.

[0015] Preferably, both of the auxiliary extraction components include silicone tubes, and the silicone tubes are fixedly connected to the hollow tongue depressor. The top and bottom of the silicone tubes are provided with several suction holes that penetrate into the interior, and the top and bottom of the silicone tubes are fixedly connected with several protrusions.

[0016] The above technical solution prevents the silicone tube from sticking to the wall and clogging the suction hole, ensuring smooth suction.

[0017] Preferably, the one-way drainage assembly includes a one-way drainage valve, which is fixedly connected to the top of the cylinder, and a drainage pipe is fixedly connected to the top of the one-way drainage valve.

[0018] With the above technical solution, when the piston moves upward, the pressure inside the cylinder increases, the drain check valve opens automatically, and the liquid is discharged to the outside through the drain pipe.

[0019] Preferably, the manual reciprocating assembly includes a handwheel and a movable seat. The handwheel is located on one side of the housing. One end of the handwheel is fixedly connected to a long shaft, which extends through the outer wall of the housing and into the interior, and is rotatably connected to the housing. One end of the long shaft inside the housing is fixedly connected to a cam. The movable seat is fixedly connected to the bottom of the piston, and the outer walls on both sides of the movable seat slide against the inner wall of the adjacent side of the housing. One side of the outer surface of the movable seat has a through hole extending to the other side, and the outer wall of the cam fits against the inner wall of the through hole.

[0020] The above technical solution involves rotating the handwheel to drive the cam to rotate, and the cam pushes the movable seat to move up and down in the through hole, thereby driving the piston to move back and forth in the cylinder to achieve manual suction and discharge.

[0021] Preferably, the bottom side of the cylinder has a through-hole that extends into the interior.

[0022] The above technical solution balances the air pressure below the movable seat inside the air vent, thus preventing air resistance during piston movement.

[0023] (III) Beneficial Effects This invention provides an emergency device for treating tongue biting during an epileptic seizure. It has the following beneficial effects: 1. This emergency tongue-biting device for epileptic patients, through the setting of synchronous bidirectional moving components, connecting rod components and movable plates, realizes continuous stepless adjustment of the distance between the upper and lower opening and closing biting plates. During use, the biting support height can be adjusted according to the size of the patient's mouth so that the silicone strip contacts the teeth. This not only avoids the problem of insufficient protection or excessive stretching caused by model mismatch of fixed-size devices, but also improves the device's versatility for patients of different ages and its ability to be quickly adapted to emergency scenarios.

[0024] 2. This emergency device for treating tongue biting during epileptic seizures comprises a hollow tongue depressor, an auxiliary extraction component, a tubing, a cylinder, a one-way inlet valve, a one-way drainage component, and a manual reciprocating component. It forms a purely mechanically driven manual suction and drainage system. The operator rotates the handwheel to drive the piston in reciprocating motion, creating intermittent negative pressure in the oral cavity. This draws saliva, blood, and refluxed material through the suction hole, silicone tubing, and hollow tongue depressor into the cylinder, and then discharges it through the one-way drainage valve. This structure requires no external power supply or sensors and can actively and efficiently clear oral secretions at the scene of an epileptic seizure, significantly reducing the risk of aspiration and suffocation.

[0025] 3. This emergency tongue-biting device for epileptic patients features a reverse adjustment function of a synchronous bidirectional moving component. After a seizure, the knob can be rotated in the opposite direction to bring the upper and lower opening and closing plates closer together, reducing the overall thickness and allowing it to easily slide out from between the patient's teeth. This design avoids the problems of loose teeth, gum damage, or device breakage caused by forcibly pulling out the device while the patient's jaw is tense after a seizure. At the same time, the elastic band can reliably fix the device to the head during emergency treatment to prevent displacement and slippage, further ensuring the safety and convenience of removal. Attached Figure Description

[0026] Figure 1 This is a first-view three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the overall second-view three-dimensional structure of the present invention; Figure 3 This is a schematic diagram showing the positional relationship between the hollow tongue depressor and the auxiliary extraction component of the present invention. Figure 4 This is a partial cross-sectional three-dimensional structural schematic diagram of the present invention; Figure 5 This is a schematic diagram showing the positional relationship between the cylindrical body and the shell of the present invention; Figure 6 This is a cross-sectional structural diagram of the cylinder and shell of the present invention.

[0027] The components are as follows: 1. Elastic band; 2. Hollow tongue depressor; 3. Silicone strip; 4. Movable plate; 5. Horizontal seat; 6. Hose; 7. Cylinder; 8. Shell; 9. Assembly seat; 10. Drain pipe; 11. Protrusion; 12. Silicone tube; 13. Suction hole; 14. Cantilever; 15. Long strip plate; 16. Connecting block; 17. Through groove; 18. Two-way screw; 19. Connecting rod body; 20. Slider; 21. Knob; 22. Handwheel; 23. Drain check valve; 24. Inlet check valve; 25. Long shaft; 26. Air hole; 27. Movable seat; 28. Piston; 29. ​​Through hole; 30. Cam. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] like Figure 1-6 As shown, this embodiment of the invention provides an emergency device for an epileptic patient who bites their tongue, including a horizontal base 5. A through groove 17 extending from the top to the bottom of the horizontal base 5 is provided. A synchronous bidirectional moving assembly is installed between the through groove 17 and the horizontal base 5. Both movable ends of the synchronous bidirectional moving assembly are rotatably connected to connecting rod assemblies. A movable plate 4 is fixedly connected to the top of the two connecting rod assemblies. The synchronous bidirectional moving assembly includes two knobs 21, which are respectively located at both ends of the horizontal base 5. A bidirectional screw 18 is fixedly connected between the two knobs 21, and the bidirectional screw 18 completely penetrates the horizontal base 5 and is rotatably connected to it. Two sliders 20 are symmetrically threaded on the outer surface of the double-acting screw 18. The thread helix angle of the double-acting screw 18 is smaller than the friction angle, which gives the double-acting screw 18 a self-locking capability, preventing it from shifting due to vibration or load. The outer walls on both sides of the slider 20 slide against the inner walls on both sides of the through groove 17. Both connecting rod assemblies include two connecting rod bodies 19, and the two connecting rod bodies 19 are rotatably connected to the outer walls on both sides of the slider 20. The top of the two connecting rod bodies 19 are rotatably connected to a connecting block 16, and the connecting block 16 is fixedly connected to the bottom of the movable plate 4. The connecting rod bodies 19 are rotatably connected to the connecting block 16 and the slider 20 through existing pins.

[0030] Two opening bite plates are symmetrically fixedly connected to one side of the outer surface of each of the two movable plates 4. A silicone strip 3 is fixedly embedded in the top of the top single opening bite plate and the bottom of the bottom single opening bite plate. Each of the two opening bite plates includes two cantilever arms 14, and the cross seat 5 and the movable plate 4 are fixedly connected to the two adjacent cantilever arms 14 respectively. The ends of the two cantilever arms 14 are fixedly connected to a long strip plate 15, and the long strip plate 15 is fixedly connected to the silicone strip 3. The silicone strip 3 is made of medical-grade silicone rubber (hardness Shore A30~50), which meets the ISO 10993 biocompatibility standard, directly contacts the teeth and gums, buffers the occlusal impact, and prevents damage to the enamel.

[0031] The bottom single opening bite plate is fixedly connected to both sides of the strap assembly. The strap assembly includes two mounting seats 9, and the two mounting seats 9 are fixedly connected to one side of two adjacent cantilever 14 respectively. The outer surfaces of the two mounting seats 9 are fixedly connected to an elastic band 1, which is a medical elastic braided band.

[0032] A hollow tongue depressor 2 is fixedly connected to one side of a single opening and closing bite plate at the bottom. Auxiliary extraction components are fixedly connected to both outer walls of the hollow tongue depressor 2. Both auxiliary extraction components include silicone tubes 12, and the silicone tubes 12 are fixedly connected to the hollow tongue depressor 2. Several suction holes 13 are opened at the top and bottom of the silicone tubes 12, extending into the interior. Several protrusions 11 are fixedly connected to the top and bottom of the silicone tubes 12. The silicone tubes 12 are made of medical-grade silicone rubber with a hardness of Shore A40~60, and extend into the cheeks on both sides of the oral cavity as suction branch tubes.

[0033] A flexible hose 6 is fixedly connected to the top of the hollow tongue depressor 2. A cylinder 7 is provided at the end of the flexible hose 6. A liquid inlet check valve 24 is fixedly connected to the top of the cylinder 7. The liquid inlet check valve 24 only allows liquid to flow from the flexible hose 6 into the cylinder 7 to prevent backflow. The top of the liquid inlet check valve 24 is fixedly connected to the flexible hose 6. A one-way drainage assembly is fixedly connected to the top of the cylinder 7. The one-way drainage assembly includes a drainage check valve 23. The drainage check valve 23 is fixedly connected to the top of the cylinder 7. A drainage pipe 10 is fixedly connected to the top of the drainage check valve 23. The drainage check valve 23 only allows liquid to flow from the cylinder 7 to the drainage pipe 10 to prevent backflow of outside air.

[0034] A piston 28 is sealed to the inner surface of the cylinder 7. Two sealing rings are fixedly fitted to the outer surface of the piston 28 to ensure a tight seal between the piston 28 and the cylinder 7. A housing 8 is fixedly connected to the bottom of the cylinder 7. A manual reciprocating assembly is installed between the housing 8 and the piston 28. The manual reciprocating assembly includes a handwheel 22 and a movable seat 27. The handwheel 22 is located on one side of the housing 8. A long shaft 25 is fixedly connected to one end of the handwheel 22. The long shaft 25 extends through the outer wall of the housing 8 and into the interior. The long shaft 25 and the housing 8 are rotatably connected through a bushing. A cam 30 is fixedly connected to one end of the long shaft 25 inside the housing 8. The movable seat 27 is fixedly connected to the cam 30. The piston 28 is fixedly connected to the bottom of the piston 28, and the outer walls of the movable seat 27 on both sides slide against the inner wall of the adjacent side of the housing 8. A through hole 29 is opened on one side of the outer surface of the movable seat 27, which extends to the other side. The through hole 29 is a rectangular hole with a width greater than the thickness of the cam 30 and a height greater than the lift of the cam 30. It accommodates the cam 30 and forces the movable seat 27 to move up and down when the cam 30 rotates. The outer wall of the cam 30 is in contact with the inner wall of the through hole 29. A vent 26 is opened on one side of the bottom of the cylinder 7, which extends into the interior. The vent 26 is used to balance the air pressure in the cavity below the movable seat 27 in the housing 8, prevent air resistance, and ensure smooth movement of the piston 28.

[0035] Working principle: First, the biting part of the device is placed into the patient's mouth, so that the hollow tongue depressor 2 fits against the tongue surface, and the upper and lower sets of opening and closing biting plates are placed between the upper and lower teeth respectively. At this time, the silicone strip 3 has not yet made close contact with the teeth.

[0036] Next, the operator turns one knob 21, which drives the bidirectional screw 18 to rotate. The two reverse threads on the bidirectional screw 18 drive the two sliders 20 to move closer to each other along the through groove 17. When the sliders 20 move, the connecting rod body 19 swings, which pushes the movable plate 4 to rise through the connecting block 16. The movable plate 4 drives the cantilever 14 and the long plate 15 fixed to it to move, while the cross seat 5 remains stationary. This increases the gap between the upper and lower sets of opening and closing bite plates until the support and fixation of the patient's oral cavity is completed.

[0037] Then, the elastic band 1 is wrapped around the patient's head to keep the device stable inside the mouth.

[0038] During an epileptic seizure, a large amount of fluid is produced in the patient's mouth. The operator manually rotates handwheel 22, which drives long shaft 25 to rotate. Cam 30 at the end of long shaft 25 rotates accordingly. Cam 30 slides within through hole 29 of movable seat 27, pushing movable seat 27 to reciprocate up and down within housing 8. Movable seat 27 drives piston 28 to move synchronously up and down within cylinder 7.

[0039] When piston 28 moves downward, the volume of the inner cavity of cylinder 7 increases and the pressure decreases. The negative pressure is transmitted to hose 6 via inlet check valve 24, and then to hollow pressure plate 2 and silicone tubes 12 on both sides. Liquid is drawn in through suction holes 13 on the surface of silicone tube 12, and enters the inner cavity of cylinder 7 via silicone tube 12, hollow pressure plate 2, hose 6, and inlet check valve 24. Protrusion 11 prevents silicone tube 12 from sticking to the wall and blocking suction holes 13.

[0040] When piston 28 moves upward, the pressure inside cylinder 7 increases, inlet check valve 24 closes, and outlet check valve 23 opens, allowing liquid to be discharged from outlet pipe 10 via outlet check valve 23. Air vent 26 balances the air pressure below movable seat 27 inside housing 8.

[0041] Continuously rotate handwheel 22 to achieve continuous suction and drainage, keeping the airway open. After the epileptic seizure ends, loosen the elastic band 1, rotate knob 21 in the opposite direction to close the upper and lower opening and closing plates, and remove the device.

[0042] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An emergency device for treating tongue biting during an epileptic seizure, comprising a horizontal base (5), characterized in that: The top of the cross seat (5) is provided with a through groove (17) extending to the bottom. A synchronous bidirectional moving component is installed between the through groove (17) and the cross seat (5). Both movable ends of the synchronous bidirectional moving component are rotatably connected to a connecting rod assembly. The tops of the two connecting rod assemblies are fixedly connected to a movable plate (4). Two opening and closing bite plates are symmetrically fixedly connected to one side of the outer surface of the two movable plates (4). A silicone strip (3) is fixedly embedded at the top of the top single opening and closing bite plate and at the bottom of the bottom single opening and closing bite plate. Both sides of the bottom single opening and closing bite plate are fixedly connected with a strap assembly; A hollow tongue depressor (2) is fixedly connected to one side of the bottom single opening and closing bite plate, and auxiliary extraction components are fixedly connected to both outer walls of the hollow tongue depressor (2). The hollow tongue depressor (2) is fixedly connected to a hose (6) at its top end. The hose (6) is provided with a cylinder (7) at its end. The top of the cylinder (7) is fixedly connected to a liquid inlet check valve (24), and the top of the liquid inlet check valve (24) is fixedly connected to the hose (6). The top of the cylinder (7) is fixedly connected to a one-way liquid discharge assembly. The inner surface of the cylinder (7) is sealed with a piston (28), and the bottom of the cylinder (7) is fixedly connected to a housing (8). A manual reciprocating assembly is installed between the housing (8) and the piston (28).

2. The emergency device for treating tongue biting during an epileptic seizure according to claim 1, characterized in that: The synchronous bidirectional moving component includes two knobs (21), and the two knobs (21) are respectively set at both ends of the horizontal seat (5). A bidirectional screw (18) is fixedly connected between the two knobs (21), and the bidirectional screw (18) is completely inserted through the horizontal seat (5) and rotatably connected to the horizontal seat (5). Two sliders (20) are symmetrically threaded on the outer surface of the bidirectional screw (18), and the outer walls on both sides of the sliders (20) slide against the inner walls on both sides of the through groove (17).

3. The emergency device for treating tongue biting during an epileptic seizure according to claim 2, characterized in that: Both of the aforementioned linkage assemblies include two linkage bodies (19), and the two linkage bodies (19) are rotatably connected to the outer walls of the two sides of the slider (20), and the top of the two linkage bodies (19) are rotatably connected to a connecting block (16), and the connecting block (16) is fixedly connected to the bottom of the movable plate (4).

4. The emergency device for treating tongue biting during an epileptic seizure according to claim 3, characterized in that: Both of the opening and closing bite plates include two cantilever (14), and the cross seat (5) and the movable plate (4) are fixedly connected to the two adjacent cantilever (14) respectively. The ends of the two cantilever (14) are fixedly connected to a long strip plate (15), and the long strip plate (15) is fixedly connected to the silicone strip (3).

5. The emergency device for treating tongue biting during an epileptic seizure according to claim 4, characterized in that: The strap assembly includes two mounting bases (9), and the two mounting bases (9) are respectively fixedly connected to one side of two adjacent cantilever (14), and the outer surfaces of the two mounting bases (9) are jointly fixedly connected with elastic bands (1).

6. The emergency device for treating tongue biting during an epileptic seizure according to claim 1, characterized in that: Both of the auxiliary extraction components include a silicone tube (12), and the silicone tube (12) is fixedly connected to the hollow tongue depressor (2). The top and bottom of the silicone tube (12) are provided with several suction holes (13) that penetrate into the interior. The top and bottom of the silicone tube (12) are fixedly connected with several protrusions (11).

7. The emergency device for treating tongue biting during an epileptic seizure according to claim 1, characterized in that: The one-way drainage assembly includes a one-way drainage valve (23), and the one-way drainage valve (23) is fixedly connected to the top of the cylinder (7). The top of the one-way drainage valve (23) is fixedly connected to a drainage pipe (10).

8. The emergency device for treating tongue biting during an epileptic seizure according to claim 1, characterized in that: The manual reciprocating assembly includes a handwheel (22) and a movable seat (27). The handwheel (22) is located on one side of the housing (8). One end of the handwheel (22) is fixedly connected to a long shaft (25), which extends through the outer wall of the housing (8) and is rotatably connected to the housing (8). One end of the long shaft (25) is fixedly connected to a cam (30) inside the housing (8). The movable seat (27) is fixedly connected to the bottom of the piston (28), and the outer walls on both sides of the movable seat (27) slide against the inner wall of the adjacent side of the housing (8). A through hole (29) is opened on one side of the outer surface of the movable seat (27) and extends to the other side. The outer wall of the cam (30) is in contact with the inner wall of the through hole (29).

9. The emergency device for treating tongue biting during an epileptic seizure according to claim 1, characterized in that: The bottom side of the cylinder (7) is provided with an air hole (26) that extends into the interior.

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