Olfactory rehabilitation training device

Abstract

This invention discloses an olfactory rehabilitation training device, including a placement chamber containing four storage tanks. Four top holes at the top of the placement chamber are aligned with the top openings of the four storage tanks. Four sets of clamping components are installed within the placement chamber, securing the storage tanks within it. A control component is located at the top of each storage tank, including a rotating cap that is rotatably engaged at the top of the storage tank. Multiple ventilation slots are evenly distributed at the top of the storage tank, and a baffle, wider than the ventilation slots, is located at the bottom of the rotating cap. The control component allows for adjustment of the odor concentration emitted from the storage tanks, enabling users to easily adjust the real-time odor concentration and preventing damage to the nasal mucosa from excessively high odor concentrations. When adjusting the odor concentration using the control component, a drive frame with magnetic blocks is moved along a support frame by controlling the current intensity, thereby adjusting the odor concentration by controlling the ventilation area.

Description

Technical Field

[0001] This invention relates to the field of olfactory training technology, and more specifically, to an olfactory rehabilitation training device. Background Technology

[0002] The core of olfactory rehabilitation is standard olfactory desensitization training. The training method mainly involves selecting four liquids / solids that can produce strong, single, mildly irritating natural odors. Under conditions without external interference, the patient inhales the odors emitted by the above-mentioned solids / liquids. Each training session requires inhaling all the odors, and a certain time interval is required when inhaling different odors.

[0003] However, most existing olfactory rehabilitation training devices lack the function of recording the time of olfactory training. During the long-term use of the device for olfactory training, patients can only adjust parameters such as the duration and interval of olfactory training through manual control. When medical staff develop treatment plans, due to the lack of data records on the time and effect of olfactory training, they cannot accurately select the duration of olfactory training in the patient's treatment cycle. This reduces the training effect and accelerates the consumption of odor source substances, resulting in an increase in both the economic and time costs of using the device. At the same time, existing training devices cannot adjust the real-time odor concentration of the odor source. The odor in olfactory training is prone to excessive stimulation to patients due to excessive concentration, which affects the efficiency of olfactory rehabilitation. Summary of the Invention

[0004] This invention provides an olfactory rehabilitation training device to solve the problem that most existing olfactory rehabilitation training devices in the prior art cannot adjust the real-time odor concentration of the odor source.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] An olfactory rehabilitation training device includes a placement chamber containing four storage cans. Four top holes at the top of the placement chamber are aligned with the top openings of the four storage cans. Four sets of clamping components are provided inside the placement chamber, and the storage cans are fixed inside the placement chamber by the clamping components. A control component is provided at the top of the storage cans. The control component includes a rotating cap that is rotatably engaged at the top of the storage can. Multiple ventilation slots are evenly distributed at the top of the storage cans. A baffle, with a width greater than the width of the ventilation slots, is provided at the bottom of the rotating cap.

[0007] Preferably, a bracket is provided at the top of the placement compartment, a drive frame is provided on the bracket, a control button is eccentrically connected to the top of the rotating cap, the drive frame is sleeved on the outside of the control button, a guide rod is fixedly connected to the outside of the drive frame, an end plate is provided at the free end of the guide rod, the guide rod passes through the bracket, a magnetic block is provided on the drive frame, and an electromagnetic controller is provided on the bracket.

[0008] Preferably, the top of the placement chamber is provided with a rotating ring, the top of the rotating ring is connected to a connecting pipe, the bottom of the connecting pipe is connected to any of the top holes, a control pump is connected to the connecting pipe, a fixed plate is connected to the free end of the connecting pipe, a pair of movable plates are slidably mounted on the fixed plate, and each of the two movable plates is provided with an elastic ring, the bottom of the elastic ring being connected to the connecting pipe.

[0009] Preferably, a telescopic pad is provided in the middle of one side of the fixed plate, and both ends of the telescopic pad are connected to the two movable plates simultaneously. The control pump controller supports a timing function, which includes a fixed time interval mode and a random interval mode.

[0010] Preferably, the bottom of the placement compartment is provided with four cover plates, which are rotatably locked at the bottom of the placement compartment. The cover plates are provided with fan-shaped grooves with an angle of 45 degrees. The placement compartment is provided with a control component, which includes a rotating rod that is rotatably locked in the placement compartment. The bottom end of the rotating rod is evenly connected with four hooks, which are locked in the fan-shaped grooves.

[0011] Preferably, a top plate is coaxially connected to the top of the rotating rod, and a pair of insert plates are connected to the top plate by a spring. Pull rings are provided at the top of the two insert plates. A pair of first fixing slots and a pair of second fixing slots are provided at the top of the middle part of the placement compartment. The shape of the insert plates matches the first fixing slots and the second fixing slots. The horizontal angle between the first fixing slots and the second fixing slots is 45 degrees.

[0012] Preferably, the clamping assembly includes two pairs of clamping blocks disposed inside the placement chamber. The clamping blocks are slidably engaged with the inner wall of the placement chamber. The two pairs of clamping blocks are symmetrically arranged along the outer side of the placement chamber. A fixing ring is provided on the inner wall of the placement chamber. A pull rope is connected to one side of each clamping block, and the pull rope passes through the fixing ring.

[0013] Preferably, the top ends of all the pull ropes located in the same clamping assembly are connected to a pair of connecting rods, and the two connecting rods are connected by a movable ring. A sealing groove is fixedly connected to the outside of the placement chamber, and the movable ring is slidably engaged in the sealing groove.

[0014] Preferably, a screw is threaded through the movable ring, and a knob is coaxially connected to the top of the screw. The knob is rotated and locked at the top of the sealing groove. An iron plate is provided at the top of the clamping block. An electromagnet is provided on the inner wall of the placement chamber. The electromagnet and the iron plate are arranged in the same horizontal direction.

[0015] Preferably, the inner wall of the storage compartment is provided with four pairs of horizontal plates, and each pair of horizontal plates is rotatably engaged with a limiting hook. The limiting hook is engaged at the top of the storage tank, and a torsion spring is provided at the hinge point between the limiting hook and the horizontal plate.

[0016] The principle and beneficial effects of this technical solution:

[0017] (1) The control component set in this invention can adjust the emission concentration of the odor source in the storage tank, making it convenient for users to adjust the real-time odor concentration and avoid damage to the nasal mucosa caused by excessive odor concentration. When the odor source concentration needs to be adjusted by using the control component, the electromagnetic controller set on the support is energized, and the drive frame with magnetic blocks is moved along the support by controlling the current intensity. When the drive frame moves, it will push the control button set inside the drive frame to move. Since the control button is eccentrically connected to the top of the rotating cap, the movement of the drive frame will drive the rotating cap to rotate, so that the baffle set at the bottom of the rotating cap rotates synchronously. During the rotation of the baffle, the area of ​​the ventilation slot opened at the top of the storage tank is blocked. The odor concentration is adjusted by controlling the ventilation area.

[0018] When different odors are needed to stimulate the patient's sense of smell, the rotating ring is turned, which will drive the connecting tube to rotate, connecting the connecting tube to the top hole of the different storage tubes. After connection, the control pump is turned on, which conducts the connecting tube. At the same time, the patient's sense of smell is stimulated by the preset time of the control pump controller. The distance between the moving plates is adjusted by the telescopic pad, and after the distance between the moving plates is made to match the distance between the patient's nostrils, the elastic ring is inserted into the patient's nostrils to prevent odor leakage.

[0019] (2) The cover plate provided in this invention can seal the bottom of the storage compartment and facilitate the user to replace the used storage tank. When the cover plate needs to be opened, pull the pull ring. The pull ring will simultaneously drive the two insert plates to disengage from the first fixing groove. Then rotate the pull ring. The pull ring will drive the rotating rod coaxially connected to its bottom end through the top plate to rotate. After the insert plate is aligned with the two second fixing grooves, release the pull ring. The insert plate will reset under the elastic force of the spring and lock the direction of the rotating rod in the second fixing groove. After the direction of the rotating rod is locked, the hooks evenly connected at the bottom end of the rotating rod will disengage from the fan-shaped groove opened on the cover plate. At this time, the cover plate will be released from rotation lock. At this time, the cover plate will deflect downward at the bottom of the storage compartment, thereby helping the user to take out the storage tank placed in the storage compartment.

[0020] (3) The clamping component provided in this invention can fix the storage tank placed in the storage compartment. When the storage tank needs to be replaced, turn the knob coaxially connected to the top of the screw. The knob will drive the screw to rotate. During the rotation of the screw, the moving ring passing through it will move. When the moving ring moves, the moving ring will drive the two connecting rods to move simultaneously, so that the pull rope connected to the bottom of the two connecting rods will be pulled down. The clamping block connected to the free end of the pull rope will move away from each other under the repulsive force of the electromagnet and the iron plate at its top, so that the clamping block will loosen its clamping on the storage tank. At this time, the storage tank can be taken out of the storage compartment and replaced. At the same time, the limiting hook connected by the horizontal plate and the torsion spring in the storage compartment can limit the upward movement distance of the storage tank, so as to avoid the storage tank from squeezing and damaging the top wall of the storage compartment. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the disassembled structure of the present invention;

[0023] Figure 3 for Figure 2 Enlarged structural diagram of region A in the middle;

[0024] Figure 4 for Figure 2 A magnified structural diagram of region B in the middle;

[0025] Figure 5 This is a schematic diagram of the cross-section of the present invention;

[0026] The reference numerals in the accompanying drawings of the instruction manual include: 1. Control pump; 2. Elastic ring; 3. Moving plate; 4. Telescopic pad; 5. Fixed plate; 6. Placement compartment; 7. Connecting pipe; 8. Rotating ring; 9. Rotating cap; 10. Guide rod; 11. Control button; 12. Drive frame; 13. Magnetic block; 14. End plate; 15. Ventilation slot; 16. Baffle; 17. Pull ring; 18. Insert plate; 19. Spring; 20. Top plate; 21. Rotating rod; 22. Knob; 23. Connecting rod; 24. Screw; 25. Moving ring; 26. Cover plate; 27. Pull rope; 28. Iron sheet; 29. ​​Clamping block; 30. Sector groove; 31. Top hole; 32. First fixing groove; 33. Fixing ring; 34. Electromagnet; 35. Second fixing groove; 36. Bracket; 37. Horizontal plate; 38. Sealing groove; 39. Storage tank. Detailed Implementation

[0027] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments:

[0028] Example:

[0029] like Figures 1 to 5As shown, the present invention provides an olfactory rehabilitation training device, including a placement chamber 6, in which four storage tanks 39 are placed. Four top holes 31 starting from the top of the placement chamber 6 are respectively aligned with the top openings of the four storage tanks 39. Four sets of clamping components are provided in the placement chamber 6, and the storage tanks 39 are fixed in the placement chamber 6 by the clamping components. A control component is provided at the top of the storage tanks 39. The control component includes a rotating cap 9 that is rotatably locked at the top of the storage tanks 39. Multiple ventilation slots 15 are evenly opened at the top of the storage tanks 39. A baffle 16 with a number of ventilation slots 15 is provided at the bottom of the rotating cap 9. The width of the baffle 16 is greater than the width of the ventilation slots 15.

[0030] The placement compartment 6 has a built-in rechargeable lithium battery with a low-power design. The charging interface uses a Type-C interface, which supports charging while in use. A single charge can meet the needs of 1 to 2 weeks of regular training.

[0031] like Figure 1 , Figure 3 and Figure 5 As shown, a bracket 36 is provided at the top of the placement compartment 6, and a drive frame 12 is installed on the bracket 36. A control button 11 is eccentrically connected to the top of the rotating cap 9. The drive frame 12 is sleeved on the outside of the control button 11. A guide rod 10 is fixedly connected to the outside of the drive frame 12. An end plate 14 is provided at the free end of the guide rod 10. The guide rod 10 is installed on the bracket 36. A magnetic block 13 is provided on the drive frame 12. An electromagnetic controller is provided on the bracket 36.

[0032] like Figure 1 and Figure 5 As shown, a rotating ring 8 is mounted on the top of the placement chamber 6. A connecting pipe 7 is connected to the top of the rotating ring 8. The bottom end of the connecting pipe 7 is connected to any of the top holes 31. A control pump 1 is connected to the connecting pipe 7. A fixed plate 5 is connected to the free end of the connecting pipe 7. A pair of movable plates 3 are slidably mounted on the fixed plate 5. An elastic ring 2 is mounted on each of the two movable plates 3. The bottom end of the elastic ring 2 is connected to the connecting pipe 7.

[0033] like Figure 1 As shown, a telescopic pad 4 is located in the middle of one side of the fixed plate 5. Both ends of the telescopic pad 4 are connected to two movable plates 3. The controller for the pump 1 supports a timer function, with both fixed and random interval modes. This controller also supports personalized training program adaptation. Users can automatically recommend or adjust the odor type, concentration, interval duration, and training frequency for the next stage based on sensitivity assessment results and historical training data, achieving a closed loop of "assessment-training-optimization." The controller has a built-in storage chip that records all training logs. It synchronizes with a mobile phone or medical platform via Bluetooth / Wi-Fi, supporting training reminders and compliance statistics. Doctors can remotely view patient progress and push training plans.

[0034] The cover plate 26 can seal the bottom of the storage compartment 6 and facilitate the replacement of the used storage can. When the cover plate 26 needs to be opened, pull the pull ring 17. The pull ring 17 will simultaneously drive the two insert plates 18 to disengage from the first fixing groove 32. Then, rotate the pull ring 17. The pull ring 17 will drive the rotating rod 21 coaxially connected to its bottom end to rotate through the top plate 20. After the insert plates 18 are aligned with the two second fixing grooves 35, release the pull ring 17. The insert plates 18 will be reset under the elastic force of the spring 19. The insert plates 18 will be locked into the second fixing grooves 35 to lock the direction of the rotating rod 21. After the direction of the rotating rod 21 is locked, the hooks evenly connected at the bottom end of the rotating rod 21 will disengage from the fan-shaped grooves 30 opened on the cover plate 26. At this time, the cover plate 26 will be released from rotation lock. The cover plate 26 will then deflect downward at the bottom of the storage compartment 6, thereby helping the user to take out the storage can 39 placed in the storage compartment 6.

[0035] like Figure 1 , Figure 3 and Figure 4 As shown, four cover plates 26 are provided at the bottom of the placement chamber 6. The cover plates 26 are rotatably locked at the bottom of the placement chamber 6. A fan-shaped groove 30 is provided on the cover plate 26. The angle of the fan-shaped groove 30 is 45 degrees. A control component is provided inside the placement chamber 6. The control component includes a rotating rod 21 that is rotatably locked inside the placement chamber 6. Four hooks are evenly connected to the bottom of the rotating rod 21. The hooks are locked in the fan-shaped groove 30.

[0036] like Figure 1 , Figure 3 and Figure 5 As shown, a top plate 20 is coaxially connected to the top of the rotating rod 21. A pair of insert plates 18 are connected to the top plate 20 by a spring 19. Pull rings 17 are provided at the top of the two insert plates 18. A pair of first fixing grooves 32 and a pair of second fixing grooves 35 are provided at the top of the middle part of the placement compartment 6. The shape of the insert plate 18 matches the first fixing grooves 32 and the second fixing grooves 35. The horizontal angle between the first fixing grooves 32 and the second fixing grooves 35 is 45 degrees.

[0037] like Figure 1 , Figure 4 and Figure 5 As shown, the clamping assembly includes two pairs of clamping blocks 29 disposed inside the placement chamber 6. The clamping blocks 29 are slidably locked onto the inner wall of the placement chamber 6. The two pairs of clamping blocks 29 are symmetrically arranged along the outer side of the placement chamber 6. A fixing ring 33 is provided on the inner wall of the placement chamber 6. A pull rope 27 is connected to one side of the clamping block 29 and passes through the fixing ring 33.

[0038] like Figure 1 , Figure 4 and Figure 5As shown, all the pull ropes 27 located in the same clamping assembly are connected to a pair of connecting rods 23 at their top ends. The two connecting rods 23 are connected by a moving ring 25. A sealing groove 38 is fixedly connected to the outside of the placement chamber 6, and the moving ring 25 is slidably locked in the sealing groove 38.

[0039] like Figure 1 , Figure 4 and Figure 5 As shown, a screw 24 is threaded through the moving ring 25, and a knob 22 is coaxially connected to the top of the screw 24. The knob 22 rotates and is locked at the top of the sealing groove 38. An iron plate 28 is provided at the top of the clamping block 29. An electromagnet 34 is provided on the inner wall of the placement chamber 6. The electromagnet 34 and the iron plate 28 are arranged in the same horizontal direction.

[0040] like Figure 1 and Figure 5 As shown, the inner wall of the storage compartment 6 is provided with four pairs of horizontal plates 37. Each pair of horizontal plates 37 is rotatably locked with a limit hook. The limit hook is locked at the top of the storage tank 39. A torsion spring is provided at the hinge of the limit hook and the horizontal plate.

[0041] The clamping assembly can fix the storage can placed in the storage compartment 6. When the storage can needs to be replaced, turn the knob 22 coaxially connected to the top of the screw 24. The knob 22 will drive the screw 24 to rotate. During the rotation of the screw 24, it will drive the moving ring 25 passing through it to move. When the moving ring 25 moves, it will drive the two connecting rods 23 to move simultaneously, so that the pull rope 27 connected to the bottom of the two connecting rods 23 will be pulled down. The clamping block 29 connected to the free end of the pull rope 27 will move away from each other under the repulsive force of the electromagnet 34 and the iron plate 28 at its top, so that the clamping block 29 will loosen its clamping on the storage can. At this time, the storage can be taken out of the storage compartment 6 and replaced. At the same time, the limiting hook connected to the horizontal plate 37 and the torsion spring in the storage compartment 6 can limit the upward movement distance of the storage can, so as to prevent the storage can from squeezing and damaging the top wall of the storage compartment 6.

[0042] The specific usage and function of this embodiment are as follows:

[0043] The control component in this invention can adjust the emission concentration of the odor source in the storage tank, making it convenient for users to adjust the real-time odor concentration and avoid damage to the nasal mucosa caused by excessive odor concentration. When it is necessary to use the control component to adjust the odor source concentration, the electromagnetic controller on the support 36 is energized. The current intensity controls the drive frame 12 with magnetic block 13 to move along the support 36. When the drive frame 12 moves, it will push the control button 11 inside the drive frame 12 to move. Since the control button 11 is eccentrically connected to the top of the rotating cap 9, the movement of the drive frame 12 will drive the rotating cap 9 to rotate, so that the baffle 16 at the bottom of the rotating cap 9 will rotate synchronously. During the rotation of the baffle 16, the area of ​​the ventilation slot 15 opened at the top of the storage tank is blocked. The odor concentration is adjusted by controlling the ventilation area.

[0044] When different scents are needed to stimulate the patient's sense of smell, the rotating ring 8 is rotated, which will drive the connecting tube 7 to rotate, so that the connecting tube 7 is connected to the top hole 31 at the top of the different storage tubes. After connection, the control pump 1 is turned on, so that the control pump 1 conducts the connecting tube 7. At the same time, the patient's sense of smell is stimulated by the preset time of the controller of the control pump 1. The distance between the moving plates 3 is adjusted by the telescopic pad 4 so that the distance between the moving plates 3 matches the distance between the patient's nostrils. Then, the elastic ring 2 is inserted into the patient's nostrils to prevent the scent from leaking.

[0045] The above descriptions are merely embodiments of the present invention, and common knowledge such as specific technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solutions of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. An olfactory rehabilitation training device, characterized in that: The device includes a placement compartment (6) containing four storage tanks (39). Four top holes (31) at the top of the placement compartment (6) are aligned with the top openings of the four storage tanks (39). The placement compartment (6) contains four sets of clamping components. The storage tanks (39) are fixed in the placement compartment (6) by the clamping components. The top of the storage tanks (39) is provided with a control component. The control component includes a rotating cap (9) that is rotatably locked at the top of the storage tanks (39). The top of the storage tanks (39) is provided with multiple ventilation slots (15). The bottom of the rotating cap (9) is provided with baffles (16) in number equal to the number of ventilation slots (15). The width of the baffles (16) is greater than the width of the ventilation slots (15).

2. The olfactory rehabilitation training device according to claim 1, characterized in that: The top of the placement compartment (6) is provided with a bracket (36), and a drive frame (12) is provided on the bracket (36). The top of the rotating cap (9) is eccentrically connected with a control button (11). The drive frame (12) is sleeved on the outside of the control button (11). A guide rod (10) is fixedly connected to the outside of the drive frame (12). An end plate (14) is provided at the free end of the guide rod (10). The guide rod (10) is passed through the bracket (36). A magnetic block (13) is provided on the drive frame (12). An electromagnetic controller is provided on the bracket (36).

3. The olfactory rehabilitation training device according to claim 2, characterized in that: The top of the placement chamber (6) is fitted with a rotating ring (8), the top of the rotating ring (8) is connected to a connecting pipe (7), the bottom end of the connecting pipe (7) is connected to any of the top holes (31), a control pump (1) is connected to the connecting pipe (7), a fixed plate (5) is connected to the free end of the connecting pipe (7), a pair of moving plates (3) are slidably fitted on the fixed plate (5), and an elastic ring (2) is provided on each of the two moving plates (3), the bottom end of the elastic ring (2) is connected to the connecting pipe (7).

4. The olfactory rehabilitation training device according to claim 3, characterized in that: A telescopic pad (4) is provided in the middle of one side of the fixed plate (5). Both ends of the telescopic pad (4) are connected to the two moving plates (3) at the same time. The controller of the control pump (1) supports a timing function, which has a fixed time interval mode and a random interval mode.

5. The olfactory rehabilitation training device according to claim 4, characterized in that: The bottom of the placement chamber (6) is provided with four cover plates (26), which are rotatably locked at the bottom of the placement chamber (6). A fan-shaped groove (30) is provided on the cover plate (26), and the angle of the fan-shaped groove (30) is forty-five degrees. A control component is provided inside the placement chamber (6). The control component includes a rotating rod (21) that is rotatably locked inside the placement chamber (6). Four hooks are evenly connected to the bottom of the rotating rod (21), and the hooks are locked in the fan-shaped groove (30).

6. The olfactory rehabilitation training device according to claim 5, characterized in that: The top of the rotating rod (21) is coaxially connected to a top plate (20). A pair of insert plates (18) are connected to the top plate (20) by a spring (19). Pull rings (17) are provided at the top of the two insert plates (18). A pair of first fixing grooves (32) and a pair of second fixing grooves (35) are provided at the top of the middle part of the placement compartment (6). The shape of the insert plate (18) matches the first fixing groove (32) and the second fixing groove (35). The horizontal angle between the first fixing groove (32) and the second fixing groove (35) is forty-five degrees.

7. An olfactory rehabilitation training device according to claim 6, characterized in that: The clamping assembly includes two pairs of clamping blocks (29) disposed inside the placement chamber (6). The clamping blocks (29) are slidably engaged with the inner wall of the placement chamber (6). The two pairs of clamping blocks (29) are symmetrically arranged along the outer side of the placement chamber (6). A fixing ring (33) is provided on the inner wall of the placement chamber (6). A pull rope (27) is connected to one side of the clamping block (29). The pull rope (27) passes through the fixing ring (33).

8. The olfactory rehabilitation training device according to claim 7, characterized in that: All the pull ropes (27) located in the same clamping assembly are connected to a pair of connecting rods (23) at their top ends. The two connecting rods (23) are connected by a moving ring (25). A sealing groove (38) is fixedly connected to the outside of the placement chamber (6). The moving ring (25) is slidably locked in the sealing groove (38).

9. An olfactory rehabilitation training device according to claim 8, characterized in that: A screw (24) is threaded through the moving ring (25), and a knob (22) is coaxially connected to the top of the screw (24). The knob (22) is rotated and locked at the top of the sealing groove (38). An iron plate (28) is provided at the top of the clamping block (29). An electromagnet (34) is provided on the inner wall of the placement chamber (6). The electromagnet (34) and the iron plate (28) are arranged in the same horizontal direction.

10. An olfactory rehabilitation training device according to claim 9, characterized in that: The inner wall of the storage compartment (6) is provided with four pairs of horizontal plates (37). Each pair of horizontal plates (37) is rotatably secured with a limiting hook. The limiting hook is secured at the top of the storage tank (39). A torsion spring is provided at the hinge point between the limiting hook and the horizontal plate.

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