Respiratory training device

Abstract

The utility model relates to the technical field of medical instruments, in particular to a respiratory training device. Comprising a training cylinder and further comprises an adjusting disc fixedly connected to the bottom of the training cylinder; the training assembly is arranged in the training cylinder and is used for carrying out respiratory training treatment on the user; the adjusting assembly is arranged in the adjusting disc and used for adjusting the training intensity of the training assembly; and the connecting pipe is communicated with the upper surface of the training cylinder. According to the breathing training device, a user can conveniently train breathing through the arranged training assembly, the user can adjust the strength of breathing training according to the requirements of the user through the arranged adjusting assembly, the user can conveniently mount and dismount the respirator through the arranged fixing assembly, and the breathing training device is convenient to use and high in practicability. Therefore, the overall sanitation degree of the training device can be effectively improved, and the situations of cross infection and the like of users are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a breathing training device. Background Art

[0002] The respiratory department is a department that examines and treats respiratory diseases. When treating respiratory-related diseases, breathing training devices are often needed to help patients restore their breathing ability, so as to improve lung ventilation, reduce breathing difficulties and promote sputum discharge.

[0003] Most of the training devices in the prior art are integrated. When users perform respiratory training, they usually wear the respirator directly on their face. This will cause sweat and oil on the face to adhere to the respirator, which will cause the respirator to be contaminated. The inside of the respirator is prone to bacteria. If the respirator cannot be effectively disassembled, replaced or disinfected, cross infection will occur when other users perform respiratory training, which will affect the health of other users and reduce the overall hygiene of the training device.

[0004] Compared with the Chinese patent with publication number CN220257098U, the utility model discloses a breathing training device, which relates to the technical field of medical auxiliary equipment. It includes a breathing mouth mask, a connection port is provided on the breathing mouth mask, a connecting pipe is connected to the connection port, a breathing intensity adjustment mechanism is connected to the end of the connecting pipe, an inner tube sleeve is connected to the end of the connecting pipe, a docking port is provided at the upper end of the inner tube sleeve, a first air inlet is provided at the edge of the lower end of the inner tube sleeve, an outer tube sleeve is provided on the outer side of the inner tube sleeve, a second air inlet is provided at the edge of the lower end of the outer tube sleeve, and a breathing flow adjustment mechanism is movably installed in the inner tube sleeve. After the first air inlet and the second air inlet are closed, it will be difficult for air to enter the breathing mouth mask through the outer tube sleeve, so that the intensity of the breathing training can be adjusted. At the same time, after a certain amount of inhalation is reached, the blocking float will move up and down and block the docking port, so that the plug rod can be moved up and down during use, so that the blocking float moves up and down, thereby adjusting the stroke of the blocking float, and then adjusting the breathing volume.

[0005] The above solution can very conveniently adjust the intensity of the breathing training, but the above solution still cannot conveniently disassemble, replace or disinfect the breathing mask, and fails to solve the problems raised in the above background technology.

[0006] Therefore, those skilled in the art provide a breathing training device to solve the problems raised in the above background technology. Utility Model Content

[0007] The utility model aims to provide a breathing training device, comprising a training cylinder, and further comprising:

[0008] An adjustment disk, fixedly connected to the bottom of the training cylinder;

[0009] A training component is arranged inside the training cylinder and is used to perform breathing training on the user;

[0010] An adjustment component, disposed inside the adjustment disk and used to adjust the training intensity of the training component;

[0011] A connecting tube is connected to the upper surface of the training tube, the outside of the connecting tube is fixedly connected to a first fixing ring, the outside of the first fixing ring is symmetrically provided with fixing plates, and the outsides of the two fixing plates are fixedly connected to fixing frames;

[0012] An air intake pipe is arranged inside the connecting pipe, an air intake end of the air intake pipe is connected to a breathing mask, a second fixing ring is fixedly connected to the outside of the air intake pipe, an L-shaped plate is symmetrically arranged on the outside of the second fixing ring, a mounting block is fixedly connected to the outside of the two L-shaped plates, and a guide groove for the mounting block to move is opened inside the two fixing frames;

[0013] The fixing assembly is arranged inside the two installation blocks and is used to fix the installation blocks and the fixing frame, so that it is convenient for the user to install and disassemble the breathing mask.

[0014] As a further improvement of the present technical solution, the training component includes a resistance plate fixedly connected to the inside of the training cylinder, a support plate fixedly connected to the inside of the training cylinder, a movable plate is provided above the support plate, a compression plate is provided below the resistance plate, a compression spring is fixedly connected to the bottom of the compression plate, and the other end of the compression spring is fixedly connected to the upper surface of the movable plate.

[0015] As a further improvement of the present technical solution, the adjusting assembly includes a threaded rod rotatably connected to the bottom end of the adjusting disk, the top of the threaded rod is rotatably connected to the bottom of the support plate, the outside of the adjusting disk is penetrated by a mounting groove for installing the rotating rod, one end of the rotating rod extends to the outside of the adjusting disk and is fixedly connected to a knob, the other end of the rotating rod is fixedly connected to the first bevel gear, the inside of the adjusting disk is fixedly connected to a fixing block, the inside of the fixing block is provided with a movable groove for the rotating rod to move, the outside of the threaded rod is fixedly connected to a second bevel gear meshing with the first bevel gear, the outside of the threaded rod is threadedly connected to a cross plate, the upper surface of the cross plate is symmetrically provided with connecting plates, the inside of the support plate is provided with a guide groove for the connecting plate to move, and the upper surfaces of the two connecting plates are fixedly connected to the bottom of the movable plate.

[0016] As a further improvement of this technical solution, guide rods are symmetrically arranged inside the training cylinder. Both ends of the two guide rods are fixedly connected to the inner top end and the inner bottom end of the training cylinder respectively. Guide grooves for the guide rods to move are opened inside the contact disk, the extrusion disk, the moving disk, the support disk and the cross plate.

[0017] As a further improvement of this technical solution, a U-shaped plate is fixedly connected to the upper surface of the adjusting disk. A fixed sleeve is fixedly connected to the outside of the U-shaped plate. A fixed rod is arranged inside the fixed sleeve. One end of the fixed rod extends to the outside of the fixed sleeve and is fixedly connected to a pulling disk. A connecting disk is fixedly connected to the outside of the fixed rod. A return spring is sleeved on the outside of the fixed rod. The return spring abuts between the connecting disk and the fixed sleeve. Guide grooves for the fixed rod to move are opened on the contact surfaces of the fixed sleeve and the U-shaped plate. Guide grooves for the fixed rod to move are annularly opened inside the knob.

[0018] As a further improvement of this technical solution, the fixing assembly includes telescopic rods respectively arranged inside two mounting blocks. The telescopic ends of the two telescopic rods are both fixedly connected with plugging rods. Pressure springs are sleeved on the outside of the two telescopic rods. Both pressure springs abut between the plugging rods and the mounting blocks. Guide grooves for the plugging rods to move are opened on the outside of the two mounting blocks. Guide grooves for the plugging rods to move are opened on the outside of the two fixed frames.

[0019] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0020] In this breathing training device, through the arranged training assembly, adjusting assembly and fixing assembly, when a user needs to perform breathing training, the user only needs to first wear the breathing mask on the face and then blow air into the inside of the breathing mask. At this time, the gas will be transmitted to the connecting pipe through the air inlet pipe and then to the training cylinder. When the gas is transmitted into the training cylinder, the training assembly can effectively perform breathing training on the user. When it is necessary to adjust the training intensity of the training assembly, only by means of the adjusting assembly can the training intensity of the training assembly be conveniently adjusted, so that the user can adjust the intensity of breathing training according to his own needs. When it is necessary to disassemble, replace or disinfect the breathing mask, only by means of the fixing assembly can the mounting block and the fixed frame be conveniently disassembled. After the mounting block and the fixed frame are disassembled, then pull the breathing mask. At this time, the breathing mask will drive the air inlet pipe to move synchronously. When the air inlet pipe is detached from the inside of the connecting pipe, the breathing mask can be disassembled, so as to facilitate the user to replace or disinfect it, effectively improving the overall hygiene degree and practicability of the training device, saving time and effort. Description of the Drawings

[0021] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the utility model;

[0022] Figure 2 This is a schematic diagram of the three-dimensional structure of the breathing mask after being disassembled in the utility model;

[0023] Figure 3 It is a schematic diagram of the cutaway three-dimensional structure of the training cylinder in the utility model;

[0024] Figure 4 It is a schematic diagram of the cutaway three-dimensional structure of the adjustment disk in the utility model;

[0025] Figure 5 It is a cutaway three-dimensional structural schematic diagram of the fixed sleeve in the utility model;

[0026] Figure 6 for Figure 2 Schematic diagram of the enlarged structure of the A area in the middle;

[0027] Figure 7 for Figure 4 Schematic diagram of the enlarged structure of the middle B area;

[0028] Figure 8 for Figure 5 Schematic diagram of the enlarged structure of the C area in the middle.

[0029] The meaning of each number in the figure is:

[0030] 1. Training cylinder; 2. Adjustment disk; 3. Connecting pipe; 4. Inlet pipe; 5. Breathing mask; 6. First fixing ring; 7. Fixing plate; 8. Fixing frame; 9. Second fixing ring; 10. L-shaped plate; 11. Mounting block; 12. Resistance disk; 13. Extrusion disk; 14. Extrusion spring; 15. Moving disk; 16. Support disk; 17. Guide rod; 18. Threaded rod; 19. Connecting plate; 20. Knob; 21. L-shaped plate; 22. Telescopic rod; 23. Plug rod; 24. Resistance spring; 25. Rotating rod; 26. Fixing block; 27. First bevel gear; 28. Second bevel gear; 29. ​​Cross plate; 30. Fixing sleeve; 31. Fixing rod; 32. Connecting disk; 33. Reset spring. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] See also Figure 1 - Figure 8 As shown, this embodiment provides a breathing training device, including a training cylinder 1, and also including:

[0033] An adjusting disk 2 is fixedly connected to the bottom of the training cylinder 1;

[0034] The training component is arranged inside the training cylinder 1 and is used to perform breathing training on the user;

[0035] An adjustment component is arranged inside the adjustment disk 2 and is used to adjust the training intensity of the training component;

[0036] The connecting tube 3 is connected to the upper surface of the training tube 1. The outside of the connecting tube 3 is fixedly connected to a first fixing ring 6. The outside of the first fixing ring 6 is symmetrically provided with fixing plates 7. The outsides of the two fixing plates 7 are both fixedly connected to fixing frames 8.

[0037] The air inlet pipe 4 is arranged inside the connecting pipe 3, the air inlet end of the air inlet pipe 4 is connected to the breathing mask 5, the outside of the air inlet pipe 4 is fixedly connected to the second fixing ring 9, the outside of the second fixing ring 9 is symmetrically provided with L-shaped plates 10, the outsides of the two L-shaped plates 10 are fixedly connected to the mounting blocks 11, and the insides of the two fixing frames 8 are provided with guide grooves for the mounting blocks 11 to move;

[0038] The fixing assembly is arranged inside the two mounting blocks 11 and is used to fix the mounting blocks 11 and the fixing frame 8 , so that it is convenient for the user to install and disassemble the breathing mask 5 .

[0039] The above working principle: when the user needs to perform breathing training, he only needs to wear the breathing mask 5 on his face first, and then blow air into the inside of the breathing mask 5. At this time, the gas will be transmitted to the connecting pipe 3 through the air inlet pipe 4, and then transmitted to the training cylinder 1. When the gas is transmitted to the training cylinder 1, the training component can effectively perform breathing training on the user. When the training intensity of the training component needs to be adjusted, the training intensity of the training component can be conveniently adjusted by adjusting the component, so that the user can adjust the intensity of the breathing training according to his own needs. When the breathing mask 5 needs to be disassembled, replaced or disinfected, it is only necessary to first use the fixing component to conveniently disassemble the mounting block 11 and the fixing frame 8. After the disassembly between the mounting block 11 and the fixing frame 8 is completed, the breathing mask 5 is pulled again. At this time, the breathing mask 5 will drive the air inlet pipe 4 to move synchronously. When the air inlet pipe 4 is detached from the inside of the connecting pipe 3, the breathing mask 5 can be disassembled, so that it is convenient for the user to replace or disinfect it, which effectively improves the overall hygiene and practicality of the training device, saving time and effort.

[0040] In order to effectively allow the user to perform breathing training, the training component includes a contact plate 12 fixedly connected to the inside of the training cylinder 1, a support plate 16 is fixedly connected to the inside of the training cylinder 1, a moving plate 15 is provided above the support plate 16, and a squeezing plate 13 is provided below the contact plate 12. A squeezing spring 14 is fixedly connected to the bottom of the squeezing plate 13, and the other end of the squeezing spring 14 is fixedly connected to the upper surface of the moving plate 15. When the user needs to perform breathing training, he only needs to wear the breathing mask 5 on his face first, and then blow air into the inside of the breathing mask 5. At this time, the gas will be transmitted to the inside of the connecting pipe 3 through the air inlet pipe 4, and then transmitted to the training cylinder 1. When the gas is transmitted to the inside of the training cylinder 1, the pressure of the gas will squeeze the squeezing plate 13, and at this time, the squeezing plate 13 will squeeze the squeezing spring 14 synchronously, so that the user can perform breathing training. When the user stops exhaling, the squeezing spring 14 will reset, driving the squeezing plate 13 to reset and move synchronously.

[0041] Taking into account that the user needs to adjust the intensity of breathing training according to the user's own needs when performing breathing training, the adjustment component includes a threaded rod 18 rotatably connected to the bottom end of the adjusting disk 2, the top of the threaded rod 18 is rotatably connected to the bottom of the support disk 16, and the outside of the adjusting disk 2 is penetrated by a mounting groove for installing a rotating rod 25. One end of the rotating rod 25 extends to the outside of the adjusting disk 2 and is fixedly connected to a knob 20, and the other end of the rotating rod 25 is fixedly connected to a first bevel gear 27. The inside of the adjusting disk 2 is fixedly connected to a fixed block 26, and the inside of the fixed block 26 is provided with a movable groove for the rotating rod 25 to move. The outside of the threaded rod 18 is fixedly connected to a second bevel gear 28 meshing with the first bevel gear 27, and the outside of the threaded rod 18 is threadedly connected to a cross plate 29, and the upper surface of the cross plate 29 is symmetrically provided with a connecting plate 19 The support plate 16 is provided with a guide groove for the connection plate 19 to move, and the upper surfaces of the two connection plates 19 are fixedly connected to the bottom of the movable plate 15. When the intensity of the breathing training needs to be adjusted, it is only necessary to turn the knob 20 first. At this time, the knob 20 will drive the rotating rod 25 to rotate synchronously, and the rotating rod 25 will drive the first bevel gear 27 to rotate synchronously, and the first bevel gear 27 will drive the second bevel gear 28 to rotate synchronously, and the second bevel gear 28 will drive the threaded rod 18 to rotate synchronously. At this time, the cross plate 29 will move synchronously on the outside of the threaded rod 18, driving the connection plate 19 to move synchronously, and the connection plate 19 will drive the movable plate 15 to move synchronously. At this time, the movable plate 15 will squeeze the extrusion spring 14. When the extrusion spring 14 is squeezed, the resistance will become larger, and the training intensity of the training component can be improved at this time.

[0042] In order to effectively improve the stability of the vane 29, the moving disk 15 and the extrusion disk 13 during movement, guide rods 17 are symmetrically arranged inside the training cylinder 1. The two ends of the two guide rods 17 are fixedly connected to the inner top end and the inner bottom end of the training cylinder 1 respectively. Guide grooves for the movement of the guide rods 17 are provided inside the contact disk 12, the extrusion disk 13, the moving disk 15, the support disk 16 and the vane 29. During the movement of the vane 29, the moving disk 15 and the extrusion disk 13, the guide rods 17 can effectively play a role in limiting and guiding, so as to effectively improve the stability of the vane 29, the moving disk 15 and the extrusion disk 13 during movement.

[0043] In order to effectively lock the knob 20 and prevent the user from accidentally touching the knob 20 during the breathing training, resulting in a change in the training intensity, a U-shaped plate 21 is fixedly connected to the upper surface of the adjusting disk 2. A fixed sleeve 30 is fixedly connected to the outside of the U-shaped plate 21. A fixed rod 31 is provided inside the fixed sleeve 30. One end of the fixed rod 31 extends to the outside of the fixed sleeve 30 and is fixedly connected to a pulling disk. A connecting disk 32 is fixedly connected to the outside of the fixed rod 31. A return spring 33 is sleeved on the outside of the fixed rod 31. The return spring 33 abuts between the connecting disk 32 and the fixed sleeve 30. Guide grooves for the movement of the fixed rod 31 are provided on the contact surfaces of the fixed sleeve 30 and the U-shaped plate 21. Guide grooves for the movement of the fixed rod 31 are annularly provided inside the knob 20. When the knob 20 needs to be rotated, just pull the pulling disk first. At this time, the pulling disk will drive the fixed rod 31 to move synchronously. The fixed rod 31 will then drive the connecting disk 32 to move synchronously. During the movement of the connecting disk 32, the return spring 33 will be compressed. When the fixed rod 31 disengages from the guide groove inside the knob 20, the knob 20 can be rotated. When the rotation of the knob 20 is completed, just release the pulling disk. At this time, the return spring 33 is reset, driving the connecting disk 32 and the fixed rod 31 to move synchronously for reset. When the fixed rod 31 is inserted into the guide groove inside the knob 20, the knob 20 can be locked. At this time, it can prevent the user from accidentally touching the knob 20 during the breathing training, resulting in a change in the training intensity.

[0044] In addition, in order to facilitate the user to disassemble, replace or disinfect the breathing mask 5, the fixing assembly includes telescopic rods 22 respectively arranged inside the two mounting blocks 11, the telescopic ends of the two telescopic rods 22 are fixedly connected with plug-in rods 23, the outsides of the two telescopic rods 22 are sleeved with resistance springs 24, the two resistance springs 24 are in resistance between the plug-in rods 23 and the mounting blocks 11, the outsides of the two mounting blocks 11 are provided with guide grooves for the movement of the plug-in rods 23, and the outsides of the two fixed frames 8 are provided with guide grooves for the movement of the plug-in rods 23. When the breathing mask 5 needs to be disassembled, it is only necessary to press the plug-in rod 23 first. At this time, the plug-in rod 23 will squeeze the telescopic rod 22 and the resistance spring 24 synchronously, and then the breathing mask 5 is pulled. At this time, the breathing mask 5 will drive the air intake pipe 4 to move synchronously, and the air intake pipe 4 will then drive the second The two fixing rings 9 move synchronously, and the second fixing ring 9 drives the L-shaped plate 10 and the mounting block 11 to move synchronously. When the mounting block 11 is separated from the interior of the fixing frame 8, the breathing mask 5 can be disassembled, so that the user can replace or disinfect it. When the breathing mask 5 needs to be installed, it is only necessary to first plug the air inlet pipe 4 into the interior of the connecting pipe 3. At this time, the mounting block 11 will drive the plug-in rod 23 to move synchronously. When the mounting block 11 drives the plug-in rod 23 to move to the guide groove outside the fixing frame 8, the resistance spring 24 resets, driving the plug-in rod 23 to reset synchronously. When the plug-in rod 23 is plugged into the guide groove outside the fixing frame 8, the fixing frame 8 and the mounting block 11 can be fixed. At this time, the breathing mask 5 can be installed, which is convenient for the user to perform breathing training.

[0045] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A breathing training device, comprising a training cylinder (1), characterized in that: Also includes: An adjustment disk (2) fixedly connected to the bottom of the training cylinder (1); A training component, arranged inside the training cylinder (1) and used to perform breathing training on the user; An adjustment component, arranged inside the adjustment disk (2) and used for adjusting the training intensity of the training component; A connecting tube (3) is connected to the upper surface of the training tube (1), the outside of the connecting tube (3) is fixedly connected to a first fixing ring (6), the outside of the first fixing ring (6) is symmetrically provided with fixing plates (7), and the outsides of the two fixing plates (7) are fixedly connected to fixing frames (8); An air intake pipe (4) is arranged inside the connecting pipe (3); an air intake end of the air intake pipe (4) is connected to a breathing mask (5); a second fixing ring (9) is fixedly connected to the outside of the air intake pipe (4); an L-shaped plate (10) is symmetrically arranged outside the second fixing ring (9); a mounting block (11) is fixedly connected to the outside of the two L-shaped plates (10); and guide grooves for the mounting blocks (11) to move are provided inside the two fixing frames (8); The fixing assembly is arranged inside the two mounting blocks (11) and is used to fix the mounting blocks (11) and the fixing frame (8), thereby facilitating the user to install and disassemble the breathing mask (5).

2. A breathing training device according to claim 1, characterized in that: The training assembly comprises a contact plate (12) fixedly connected to the inside of a training cylinder (1); a support plate (16) is fixedly connected to the inside of the training cylinder (1); a moving plate (15) is arranged above the support plate (16); a pressing plate (13) is arranged below the contact plate (12); a pressing spring (14) is fixedly connected to the bottom of the pressing plate (13); and the other end of the pressing spring (14) is fixedly connected to the upper surface of the moving plate (15).

3. A breathing training device according to claim 2, characterized in that: The adjusting assembly comprises a threaded rod (18) rotatably connected to the bottom end of the adjusting disk (2); the top end of the threaded rod (18) is rotatably connected to the bottom of the supporting disk (16); a mounting groove for mounting a rotating rod (25) is provided through the outside of the adjusting disk (2); one end of the rotating rod (25) extends to the outside of the adjusting disk (2) and is fixedly connected to a knob (20); the other end of the rotating rod (25) is fixedly connected to a first bevel gear (27); the inside of the adjusting disk (2) is fixedly connected to a fixing block (26); The fixed block (26) is provided with a movable groove for the rotating rod (25) to move, the threaded rod (18) is fixedly connected to the outside with a second bevel gear (28) meshing with the first bevel gear (27), the threaded rod (18) is threadedly connected to the outside with a cross plate (29), the upper surface of the cross plate (29) is symmetrically provided with connecting plates (19), the support plate (16) is provided with a guide groove for the connecting plates (19) to move, and the upper surfaces of the two connecting plates (19) are fixedly connected to the bottom of the movable plate (15).

4. A breathing training device according to claim 3, characterized in that: The interior of the training cylinder (1) is symmetrically provided with guide rods (17). Both ends of the two guide rods (17) are fixedly connected to the inner top end and the inner bottom end of the training cylinder (1) respectively. Guide grooves for the movement of the guide rods (17) are formed inside the contact disc (12), the extrusion disc (13), the moving disc (15), the support disc (16) and the cross plate (29).

5. A breathing training device according to claim 3, characterized in that: The upper surface of the adjusting disc (2) is fixedly connected with a U-shaped plate (21). The outside of the U-shaped plate (21) is fixedly connected with a fixed sleeve (30). A fixed rod (31) is arranged inside the fixed sleeve (30). One end of the fixed rod (31) extends to the outside of the fixed sleeve (30) and is fixedly connected with a pulling disc. A connecting disc (32) is fixedly connected to the outside of the fixed rod (31). A return spring (33) is sleeved on the outside of the fixed rod (31). The return spring (33) abuts between the connecting disc (32) and the fixed sleeve (30). Guide grooves for the movement of the fixed rod (31) are formed on the contact surfaces of the fixed sleeve (30) and the U-shaped plate (21). Guide grooves for the movement of the fixed rod (31) are annularly formed inside the knob (20).

6. A breathing training device according to claim 1, characterized in that: The fixing assembly includes telescopic rods (22) respectively arranged inside two mounting blocks (11). The telescopic ends of the two telescopic rods (22) are both fixedly connected with insertion rods (23). The outside of the two telescopic rods (22) is sleeved with abutting springs (24). The two abutting springs (24) both abut between the insertion rods (23) and the mounting blocks (11). Guide grooves for the movement of the insertion rods (23) are formed on the outside of the two mounting blocks (11). Guide grooves for the movement of the insertion rods (23) are formed on the outside of the two fixing frames (8).

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