Anti-suffocation liquid food appliance for bedridden patient

Abstract

The anti-suffocation liquid food utensil comprises a shell, a feeding channel is formed in the shell, an opening is formed in the feeding channel, a mounting disc is rotatably arranged in the shell, two sets of filter plates are annularly arranged on the mounting disc, one set of filter plates is arranged in the opening and communicated with the feeding channel, and the other set of filter plates is arranged in the opening and communicated with the feeding channel. A movable rod is slidably arranged on the side wall of the shell in a penetrating mode, a driving mechanism is arranged at one end of the movable rod, sliding of the movable rod in the first direction is converted into driving of the mounting disc to rotate through the driving mechanism, a cleaning disc is slidably arranged in the shell, and a cleaning rod aligned with the holes in one set of filter plates is arranged on the cleaning disc. The movable rod is connected with the cleaning disc through a propelling mechanism. According to the liquid food utensil, the blocked filter plate can be quickly cleaned and dredged, the filter plate does not need to be manually detached and cleaned, continuous supply of liquid food can be achieved, the liquid food supply efficiency is effectively improved, and the use experience of a patient is improved.

Description

Technical Field

[0001] The present invention specifically relates to an anti-asphyxia liquid food appliance for bedridden patients. Background Art

[0002] The dietary care of bedridden patients is an important link in ensuring their physical health and rehabilitation process. Due to reasons such as diseases, surgical traumas, or the decline of physical functions, the swallowing and chewing functions of many bedridden patients will be affected to varying degrees. Therefore, a liquid food supply device is needed to crush the food and then supply it to the patient's oral cavity or digestive tract.

[0003] For example, the Chinese patent with the publication number CN221932608U provides an anti-asphyxia liquid food appliance for the care of bedridden patients. A cutting knife on a rotating rod is driven by a lead screw to break up small particles in the liquid food. In order to prevent small particulate matter from entering the stomach and causing indigestion and vomiting in the patient, a rotating crank is rotated to drive the cutting knife on the rotating shaft to rotate, completely breaking up the particulate matter in the liquid food. The small particulate matter in the liquid food is broken up and flows out through a filter screen, ensuring the safety of the patient when injecting liquid food.

[0004] However, most of the existing anti-asphyxia liquid food appliances filter the liquid food through a filter screen. Since there are many solid substances in the liquid food, the filter screen is extremely prone to clogging. The existing liquid food appliances cannot quickly dredge the filter screen during the feeding process of the liquid food, resulting in the clogging of the filter screen and the inability to continue supplying the liquid food. In view of this, an anti-asphyxia liquid food appliance for bedridden patients is proposed to solve the above problems. Summary of the Invention

[0005] Aiming at the deficiencies of the existing technology, the present invention proposes an anti-asphyxia liquid food appliance for bedridden patients to solve the technical problems in the above background art, that is, most of the existing anti-asphyxia liquid food appliances filter the liquid food through a filter screen. Since there are many solid substances in the liquid food, the filter screen is extremely prone to clogging. The existing liquid food appliances cannot quickly dredge the filter screen during the feeding process of the liquid food, resulting in the clogging of the filter screen and the inability to continue supplying the liquid food.

[0006] To achieve the above object, the present invention provides the following technical solution. An anti-asphyxia liquid food appliance for bedridden patients includes:

[0007] A housing, on which a feeding channel is provided, and an opening is provided on the feeding channel;

[0008] A mounting disk, which is rotatably arranged in the housing along its axis. Two groups of filter plates are circumferentially arranged on the mounting disk, and one of the groups of filter plates is arranged in the opening and communicated with the feeding channel;

[0009] The movable rod is slidably disposed through the side wall of the housing. A driving mechanism is provided at one end of the movable rod. The driving mechanism converts the sliding of the movable rod in the first direction into driving the mounting disk to rotate; and

[0010] The cleaning disk is slidably disposed along the axis of the housing. Cleaning rods aligned with the holes in one set of the filter plates are provided on the cleaning disk. The movable rod is connected to the cleaning disk through a propulsion mechanism. The propulsion mechanism converts the sliding of the movable rod in the second direction into driving the cleaning disk to reciprocate.

[0011] Further, the feeding channel includes:

[0012] The feeding tube is disposed on the housing and is hermetically communicated with one side of one set of the filter plates within the opening;

[0013] The limiting disk is disposed on one side of the housing; and

[0014] The supply tube is disposed on the limiting disk. There is a gap between the end of the supply tube and the feeding tube to form the opening, and the supply tube is hermetically communicated with the other side of one set of the filter plates within the opening.

[0015] Further, a handle is fixedly disposed on the housing. One end of the handle is detachably connected to the limiting disk. A pull ring is provided at the end of the movable rod extending out of the housing. A first elastic member is disposed between the pull ring and the inner wall of the handle.

[0016] Further, a cavity aligned with the cleaning disk is provided on the limiting disk. A detachable collection trough is provided on the side wall of the cavity.

[0017] Further, a rotatable cleaning brush is further disposed in the cavity. A linkage assembly connected to the cleaning brush is provided on the movable rod. The linkage assembly converts the sliding of the movable rod into driving the cleaning brush to rotate.

[0018] Further, the linkage assembly includes:

[0019] The straight rack is disposed on the handle; and

[0020] The gear is disposed on the cleaning brush and meshes with the straight rack.

[0021] Further, the driving mechanism includes:

[0022] The ratchet wheel is disposed on one side of the mounting disk;

[0023] The pawl is hinged to the end of the movable rod and meshes with the ratchet wheel; and

[0024] A torsion spring is arranged at the hinge joint of the movable rod and the pawl, and its two ends are respectively connected to the movable rod and the pawl.

[0025] Furthermore, the propulsion mechanism includes:

[0026] A driving frame, hinged to the movable rod;

[0027] A driving shaft, slidably arranged along the axis of the housing at the end of the driving frame;

[0028] A guiding assembly, arranged in the housing and connected to the driving shaft to drive the driving shaft to slide along its axis when the movable rod slides in the second direction; and

[0029] A connecting assembly, arranged on the driving shaft to drive the cleaning disc to reciprocate when the driving shaft slides.

[0030] Furthermore, the guiding assembly includes:

[0031] A guiding plate, arranged in the housing. The guiding plate is provided with a flat rail and an arc rail communicating with both ends thereof. One end of the flat rail is higher than the arc rail, and the other end is lower than the arc rail;

[0032] A second elastic member, arranged between the driving frame and the movable rod; and

[0033] A guiding column, arranged on the driving shaft and slidably clamped in the flat rail or the arc rail.

[0034] Furthermore, the connecting assembly includes:

[0035] A propulsion frame, slidably arranged on the guiding plate;

[0036] A connecting column, arranged on the cleaning disc. An installation sleeve is arranged in the housing. The connecting column is slidably arranged along its axis in the installation sleeve and exposed outside, and is connected to the propulsion frame; and

[0037] A sliding frame, arranged on the propulsion frame. A driving column is arranged at the end of the driving shaft, and the driving column is slidably arranged in the sliding frame.

[0038] Compared with the prior art, the present invention has the following beneficial effects:

[0039] When the liquid food appliance is in use, the feeding channel is connected to the crushing device. After the food is crushed by the crushing device, it passes through the device and is supplied to the patient's oral cavity or digestive tract for liquid food supply. During the process of supplying liquid food, the liquid food can be filtered through the filter plate. When the filter plate is blocked, the movable rod can be controlled to slide reciprocally. When the movable rod slides in the first direction, the driving mechanism drives the mounting plate to rotate, so that a group of unblocked filter plates move into the opening of the feeding channel to continue filtering the liquid food. When the movable rod slides in the second direction, the cleaning plate is controlled to reciprocate in the shell through the pushing mechanism. During the reciprocating movement of the cleaning plate, the cleaning rod is inserted into the through hole on the filter plate to clean and dredge the filter plate. Therefore, the blocked filter plate can be quickly cleaned and dredged without manually disassembling and cleaning the filter plate, and the continuous supply of liquid food can be realized, effectively improving the efficiency of liquid food supply and enhancing the patient's use experience. Description of the Drawings

[0040] In order to more clearly illustrate the specific embodiments of the present invention, the drawings required for the specific embodiments will be briefly introduced below. In all the drawings, the components or parts are not necessarily drawn to scale.

[0041] Figure 1 Schematic three-dimensional structure diagram of an anti-asphyxia liquid food appliance for bedridden patients provided by the present invention;

[0042] Figure 2 Schematic structure diagram of an anti-asphyxia liquid food appliance for bedridden patients of the present invention after being disassembled;

[0043] Figure 3 Schematic installation structure diagram of the limit disk and the parts above it in an anti-asphyxia liquid food appliance for bedridden patients of the present invention;

[0044] Figure 4 Schematic installation structure diagram of the parts inside the shell in an anti-asphyxia liquid food appliance for bedridden patients of the present invention;

[0045] Figure 5 Schematic structure diagram of the shell in an anti-asphyxia liquid food appliance for bedridden patients of the present invention;

[0046] Figure 6 For Figure 5 Enlarged schematic diagram of area A in

[0047] Figure 7 Schematic structure diagram of the cleaning plate in an anti-asphyxia liquid food appliance for bedridden patients of the present invention;

[0048] Figure 8 Schematic installation structure diagram of the pawl and the parts above it in an anti-asphyxia liquid food appliance for bedridden patients of the present invention;

[0049] Reference numerals:

[0050] 1. Housing; 2. Feeding tube; 3. Handle; 4. Guide plate; 5. Flat rail; 6. Arc rail; 7. Mounting sleeve; 8. Mounting plate; 9. Filter plate; 10. Straight rack; 11. Limit disk; 12. Supply pipe; 13. Gear; 14. Cleaning brush; 15. Collection trough; 16. Movable rod; 17. Pull ring; 18. Pawl; 19. Torsion spring; 20. Ratchet; 21. Driving frame; 22. Driving shaft; 23. Guide post; 24. Driving post; 25. Pusher frame; 26. Slide frame; 27. Connecting post; 28. Cleaning disk; 29. Cleaning rod. Detailed implementation mode

[0051] The present invention will be further described in detail below with reference to the accompanying drawings. It is necessary to point out here that the following specific implementation modes are only used to further illustrate the present invention and cannot be understood as limiting the protection scope of the present invention. Those skilled in the art can make some non-essential improvements and adjustments to the present invention according to the above application content.

[0052] Embodiment:

[0053] As Figures 1 to 3 shown, the present invention provides an anti-asphyxia liquid food appliance for bedridden patients, including a housing 1. A feeding channel is provided on the housing 1, and an opening is provided on the feeding channel. A rotatable mounting plate 8 is further provided in the housing 1. Two groups of filter plates 9 are circumferentially arranged on the mounting plate 8. One group of filter plates 9 is arranged in the opening and communicated with the feeding channel. The feeding channel includes a feeding tube 2 on the housing 1. The feeding tube 2 is hermetically communicated with one side of a group of filter plates 9 in the opening. A limit disk 11 is provided on one side of the housing 1. A supply pipe 12 is provided on the limit disk 11. There is a gap between the end of the supply pipe 12 and the feeding tube 2 to form an opening. The supply pipe 12 is hermetically communicated with the other side of a group of filter plates 9 in the opening.

[0054] When the liquid food appliance is in use, the supply pipe 12 is connected to a food crushing device. After the food is crushed by the crushing device, it flows into the supply pipe 12. The food passes through the filtration of a group of filter plates 9 in the opening and flows into the feeding tube 2 to supply liquid food to the patient. And the two groups of filter plates 9 can be driven to move by rotating the limit disk 11, so that the two groups of filter plates 9 can alternately move into the opening and be communicated with the supply pipe 12 and the feeding tube 2. In addition, it can be understood that in some embodiments, sealing rings need to be added at the joints of the supply pipe 12 and the feeding tube 2 and the filter plates 9 to prevent liquid food from leaking into the appliance.

[0055] As Figure 1 , 2As shown in the figure, in this embodiment, a movable rod 16 is slidably penetrated through the side wall of the housing 1. A handle 3 is fixedly arranged on the housing 1. One end of the handle 3 is detachably connected to the limiting disk 11. A pull ring 17 is arranged at one end of the movable rod 16 extending out of the housing 1. A first elastic member is arranged between the pull ring 17 and the inner wall of the handle 3. The limiting disk 11 is connected through the handle 3 to limit the mounting disk 8. And after feeding is completed, the limiting disk 11 can be detached to facilitate cleaning the interior of the housing 1. During use, the movable rod 16 can be driven to slide on the side wall of the housing 1 by pulling the pull ring 17, and under the action of the first elastic member, the movable rod 16 can be reset so that the movable rod 16 can slide reciprocally on the housing 1.

[0056] As Figure 1 , 2 , 8 shown, in this embodiment, a driving mechanism is arranged at one end of the movable rod 16. The sliding of the movable rod 16 in the first direction is converted into driving the mounting disk 8 to rotate through the driving mechanism. The driving mechanism includes a ratchet wheel 20 arranged on one side of the mounting disk 8 and a ratchet pawl 18 hinged to the end of the movable rod 16. The ratchet pawl 18 meshes with the ratchet wheel 20. A torsion spring 19 is arranged at the hinge joint of the movable rod 16 and the ratchet pawl 18. Two ends of the torsion spring 19 are respectively connected to the movable rod 16 and the ratchet pawl 18.

[0057] By holding the handle 3 and the pull ring 17 to drive the movable rod 16 to slide, the sliding of the movable rod 16 towards the outside of the housing 1 is the first direction, and the sliding towards the inside of the housing 1 is the second direction. Under the action of the torsion spring 19, the ratchet pawl 18 is clamped on the ratchet wheel 20. When the movable rod 16 slides in the first direction, the mounting disk 8 is driven to rotate through the cooperation of the ratchet pawl 18 and the ratchet wheel 20, so that the used filter plate 9 is moved out of the opening of the feeding channel, and the unused filter plate 9 is moved into the opening, thereby replacing the filter plate 9. And during the process of the movable rod 16 sliding and resetting in the second direction, the ratchet pawl 18 disengages from the ratchet wheel 20 and does not control the rotation of the mounting disk 8. In addition, it can be understood that in some preferred embodiments, if the friction force of the rotation of the mounting disk 8 is small, a locking pawl needs to be installed to unidirectionally lock the ratchet wheel 20. If the friction force of the rotation of the mounting disk 8 is large and it is not easy to rotate automatically, there is no need to install a locking pawl.

[0058] As Figure 2 , 4As shown in FIGS. 5, 6, and 8, in this embodiment, a cleaning plate 28 is slidably disposed along the axial direction of the housing 1. A cleaning rod 29 aligned with the holes on one set of filter plates 9 is provided on the cleaning plate 28. The movable rod 16 is connected to the cleaning plate 28 through a propulsion mechanism. The propulsion mechanism converts the sliding of the movable rod 16 in the second direction into driving the cleaning plate 28 to reciprocate. The propulsion mechanism includes a driving frame 21 hinged to the movable rod 16. A driving shaft 22 is slidably disposed along the axis of the housing 1 at the end of the driving frame 21. A guiding assembly is provided inside the housing 1. The guiding assembly is connected to the driving shaft 22 to drive the driving shaft 22 to slide along its axis when the movable rod 16 slides in the second direction. The guiding assembly includes a guiding plate 4 inside the housing 1. A flat rail 5 and an arc rail 6 communicating with both ends thereof are formed on the guiding plate 4. One end of the flat rail 5 is higher than the arc rail 6, and the other end is lower than the arc rail 6. A second elastic member is provided between the driving frame 21 and the movable rod 16. A guiding column 23 is provided on the driving shaft 22. The guiding column 23 is slidably clamped in the flat rail 5 or the arc rail 6.

[0059] In the initial state, the movable rod 16 is in a retracted state. The guiding column 23 is clamped at one end of the flat rail 5. When the movable rod 16 is controlled to slide, the guiding column 23 slides from one end of the flat rail 5 to the other end and is clamped into the arc rail 6. When the movable rod 16 is reset, the guiding column 23 slides from one end of the arc rail 6 to the other end and is clamped into the flat rail 5, so that the driving shaft 22 makes a single reciprocating slide along the axis of the housing 1 at the end of the driving frame 21.

[0060] As Figure 4 、 7 、8, in this embodiment, a connecting assembly is provided on the driving shaft 22. The connecting assembly drives the cleaning plate 28 to reciprocate when the driving shaft 22 slides. The connecting assembly includes a propulsion frame 25 slidably disposed on the guiding plate 4. A connecting column 27 is provided on the cleaning plate 28. An installation sleeve 7 is provided inside the housing 1. The connecting column 27 is slidably disposed along its axis inside the installation sleeve 7 and exposed outside, and is connected to the propulsion frame 25. A sliding frame 26 is provided on the propulsion frame 25. A driving column 24 is provided at the end of the driving shaft 22. The driving column 24 is slidably disposed in the sliding frame 26.

[0061] During the reciprocating sliding of the driving shaft 22 at the end of the driving frame 21, the propulsion frame 25 is driven to make a single reciprocating slide through the cooperation of the driving column 24 and the sliding frame 26. During the movement of the propulsion frame 25, the cleaning plate 28 can be pushed to slide through the connecting column 27, so that the cleaning rod 29 on one side of the cleaning plate 28 is inserted into the holes on the filter plate 9 to dredge the blocked filter plate 9. Thus, when the liquid food appliance is in use, the filter plate 9 can be dredged and cleaned without disassembling the filter plate 9. The cleaned filter plate 9 is prepared for subsequent use.

[0062] As Figure 3As shown, in this embodiment, a cavity aligned with the cleaning plate 28 is provided on the limiting plate 11, and a detachable collection groove 15 is provided on the side wall of the cavity. During the process of the cleaning rod 29 moving to clean the filter plate 9, the food residues blocked on one side of the filter plate 9 can fall into the collection groove 15, facilitating the collection of the residues.

[0063] As Figure 1 , 3 shown, in this embodiment, a rotatable cleaning brush 14 is further provided in the cavity, and a linkage assembly connected to the cleaning brush 14 is provided on the movable rod 16. The sliding of the movable rod 16 is converted into driving the cleaning brush 14 to rotate through the linkage assembly. The linkage assembly includes a straight rack 10 provided on the handle 3 and a gear 13 provided on the cleaning brush 14, and the straight rack 10 meshes with the gear 13.

[0064] During the process of controlling the movement of the movable rod 16, the straight rack 10 is driven to move, and the cleaning brush 14 is driven to rotate through the meshing of the straight rack 10 and the gear 13, so as to clean the end of the cleaning rod 29 inserted into the filter plate 9, avoiding the food residues from adhering to the filter plate 9 again when the cleaning rod 29 resets, and effectively improving the cleaning effect.

[0065] Specific usage method and beneficial effects of the present invention:

[0066] When this liquid food appliance is in use, the feeding channel is connected to the crushing device. After the food is crushed by the crushing device, it passes through this device and is supplied to the patient's oral cavity or digestive tract for liquid food supply to the patient, and the liquid food can be filtered by the filter plate 9 during the process of supplying the liquid food. When the filter plate 9 is blocked, the movable rod 16 can be controlled to slide reciprocally. When the movable rod 16 slides in the first direction, the mounting plate 8 is driven to rotate through the driving mechanism, so that an unblocked group of filter plates 9 moves to the opening of the feeding channel to continue filtering the liquid food. When the movable rod 16 slides in the second direction, the cleaning plate 28 is controlled to reciprocate in the housing 1 through the pushing mechanism. During the reciprocating movement of the cleaning plate, the cleaning rod 29 is inserted into the through hole on the filter plate 9 to clean and dredge the filter plate 9. Thus, the blocked filter plate 9 can be quickly cleaned and dredged without manually disassembling and cleaning the filter plate 9, and the continuous supply of liquid food can be realized, effectively improving the efficiency of liquid food supply and increasing the patient's usage experience.

[0067] The above shows and describes the basic principles, main features and advantages of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments. Based on the present invention, some modifications or improvements can be made, which are obvious to those skilled in the art. Therefore, these modifications or improvements made without departing from the spirit of the present invention all fall within the scope of the present invention claimed.

Claims

1. An anti-asphyxia liquid food appliance for bedridden patients, characterized in that, Comprising: A housing (1), on which a feeding channel is provided, and an opening is provided on the feeding channel; A mounting plate (8), rotatably arranged in the housing (1) along its axis. Two groups of filter plates (9) are circumferentially arranged on the mounting plate (8), and one group of the filter plates (9) is arranged in the opening and communicated with the feeding channel; A movable rod (16), slidably passing through the side wall of the housing (1). A driving mechanism is arranged at one end of the movable rod (16), and the sliding of the movable rod (16) in the first direction is converted into driving the mounting plate (8) to rotate through the driving mechanism; and A cleaning plate (28), slidably arranged in the housing (1) along the axis of the housing (1). Cleaning rods (29) aligned with the holes on one group of the filter plates (9) are arranged on the cleaning plate (28). The movable rod (16) is connected with the cleaning plate (28) through a propulsion mechanism, and the sliding of the movable rod (16) in the second direction is converted into driving the cleaning plate (28) to reciprocate through the propulsion mechanism.

2. The anti-asphyxia liquid food appliance for bedridden patients according to claim 1, wherein, The feeding channel comprises: A feeding pipe (2), arranged on the housing (1) and hermetically communicated with one side of one group of the filter plates (9) in the opening; A limiting plate (11), arranged on one side of the housing (1); and A supply pipe (12), arranged on the limiting plate (11), with a gap between its end and the feeding pipe (2) to form the opening, and hermetically communicated with the other side of one group of the filter plates (9) in the opening.

3. The anti-asphyxia liquid food appliance for bedridden patients according to claim 2, characterized in that: A handle (3) is fixedly arranged on the housing (1). One end of the handle (3) is detachably connected with the limiting plate (11). A pull ring (17) is arranged at the end of the movable rod (16) extending out of the housing (1), and a first elastic member is arranged between the pull ring (17) and the inner wall of the handle (3).

4. The anti-asphyxia liquid food appliance for bedridden patients according to claim 3, characterized in that: A cavity aligned with the cleaning plate (28) is arranged on the limiting plate (11), and a detachable collecting groove (15) is arranged on the side wall of the cavity.

5. The anti-asphyxia liquid food appliance for bedridden patients according to claim 4, characterized in that: A rotatable cleaning brush (14) is further arranged in the cavity. A linkage assembly connected with the cleaning brush (14) is arranged on the movable rod (16), and the sliding of the movable rod (16) is converted into driving the cleaning brush (14) to rotate through the linkage assembly.

6. The anti-asphyxia liquid food appliance for bedridden patients according to claim 5, wherein, The linkage assembly comprises: A straight rack (10), arranged on the handle (3); and A gear (13), arranged on the cleaning brush (14) and meshed with the straight rack (10).

7. The anti-asphyxia liquid food appliance for bedridden patients according to claim 1, characterized in that, The driving mechanism comprises: A ratchet wheel (20), arranged on one side of the mounting plate (8); A ratchet pawl (18), hinged at the end of the movable rod (16) and meshed with the ratchet wheel (20); and A torsion spring (19), arranged at the hinge of the movable rod (16) and the ratchet pawl (18), and its two ends are respectively connected with the movable rod (16) and the ratchet pawl (18).

8. The anti-asphyxia liquid food appliance for bedridden patients according to claim 1, wherein, The propulsion mechanism comprises: A driving frame (21), hinged on the movable rod (16); A drive shaft (22) is slidably arranged along the axis of the housing (1) at the end of the drive frame (21); A guiding assembly is arranged in the housing (1) and connected to the drive shaft (22) to drive the drive shaft (22) to slide along its axis when the movable rod (16) slides in the second direction; and A connecting assembly is arranged on the drive shaft (22) to drive the cleaning disc (28) to reciprocate when the drive shaft (22) slides.

9. The anti-asphyxia liquid food appliance for bedridden patients according to claim 8, characterized in that, The guiding assembly includes: A guiding plate (4) is arranged in the housing (1). A flat rail (5) and an arc rail (6) communicating with both ends thereof are formed on the guiding plate (4). One end of the flat rail (5) is higher than the arc rail (6), and the other end is lower than the arc rail (6); A second elastic member is arranged between the drive frame (21) and the movable rod (16); and A guiding column (23) is arranged on the drive shaft (22) and is slidably clamped in the flat rail (5) or the arc rail (6).

10. The anti-asphyxia liquid food appliance for bedridden patients according to claim 9, characterized in that, The connecting assembly includes: A propulsion frame (25) is slidably arranged on the guiding plate (4); A connecting column (27) is arranged on the cleaning disc (28). An installation sleeve (7) is arranged in the housing (1). The connecting column (27) is slidably arranged along its axis in the installation sleeve (7) and is exposed outside, and is connected to the propulsion frame (25); and A sliding frame (26) is arranged on the propulsion frame (25). A driving column (24) is arranged at the end of the drive shaft (22), and the driving column (24) is slidably arranged in the sliding frame (26).

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