Liquid level height display assembly and throwing device

Abstract

The invention belongs to the technical field of mechanical equipment, and discloses a liquid level height display assembly and a throwing device. The liquid level height display assembly comprises a liquid storage cavity and a liquid level height display module, wherein the top wall of the liquid storage cavity is provided with a first track which extends horizontally; the vernier structure comprises a floating part arranged in the liquid storage cavity and an indicating part movably arranged in the first track; the indicating part is in transmission connection with the floating part, and the floating part moves up and down along with the height change of the liquid level in the liquid storage cavity to drive the indicating part to horizontally move along the first track. The liquid level height display assembly is of a pure mechanical structure and comprises a liquid storage cavity and a vernier structure arranged in the liquid storage cavity, and the vernier structure is provided with a floating part and an indicating part which are in transmission connection. During use, the floating part detects the height of the liquid level and transmits the height to the indicating part, and a user can know the height of the liquid level through the position of the indicating part in the first track. The scheme is simple in structure and low in cost.

Description

Technical Field

[0001] The invention belongs to the field of mechanical equipment, and in particular relates to a liquid level display component and a delivery device. Background Art

[0002] With the development of technology, more and more fields require liquid level detection devices. For example, in the field of clothing processing equipment, a liquid level detection device needs to be installed in the washing machine to detect the water level information in the washing tub to determine the amount of water entering. Or in the clothing treatment agent delivery device, a liquid level detection device is installed to determine the amount of clothing treatment agent delivered.

[0003] The commonly used method now is to detect the liquid level by a sensor, but the cost of the sensor is relatively high. Therefore, a solution with simple structure and low cost is urgently needed to detect the liquid level.

[0004] In view of this, the present invention is proposed. Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a liquid level display component and a dispensing device with a simple structure and low cost.

[0006] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is:

[0007] In one aspect, a liquid level display assembly is provided.

[0008] The liquid level display assembly comprises: a liquid storage chamber, on the top wall of which a first track extending horizontally is arranged;

[0009] A cursor structure, comprising a floating portion disposed in the liquid storage cavity, and an indicating portion movably disposed in the first track;

[0010] The indicating part is in transmission connection with the floating part, and the floating part moves up and down as the liquid level in the liquid storage chamber changes, driving the indicating part to move horizontally along the first track.

[0011] The solution provided by the present invention provides a mechanical structure of a liquid level display component, the mechanical structure includes a liquid storage chamber and a cursor structure arranged in the liquid storage chamber, the cursor structure has a floating part and an indicating part connected by transmission. When in use, the floating part detects the liquid level and transmits it to the indicating part, and the user can know the height of the liquid level through the position of the indicating part in the first track. The solution is simple in structure and low in cost.

[0012] Furthermore, the cursor structure also includes a connecting portion, and the connecting portion is made of a material that can be bent and deformed;

[0013] One end of the connecting part is fixedly connected to the floating part, and the other end is connected to the indicating part.

[0014] Furthermore, it also includes a second track extending vertically, wherein the second track is connected to the first track;

[0015] The connecting part is limited within the first track and the second track to form a vertical section and a horizontal section that are vertically connected; the floating part moves up and down, driving the connecting part to move, so that the lengths of the vertical section and the horizontal section change.

[0016] Furthermore, the display assembly further comprises:

[0017] The columnar structure is vertically extended downward from the top wall of the liquid storage cavity, and the interior of the columnar structure is hollow to form the second track.

[0018] Further, the cross-sectional area of ​​the floating portion is greater than the cross-sectional area of ​​the vertical section, and the vertical section is connected to the central area of ​​the floating portion.

[0019] Furthermore, a through hole penetrating the floating part is arranged outside the central area of ​​the floating part, and the columnar structure is inserted into the through hole.

[0020] Furthermore, the columnar structure has an opening connected to the second track, and the opening is extended along the axial direction of the columnar structure;

[0021] The floating portion is provided with connecting ribs, and the connecting ribs are arranged corresponding to the openings.

[0022] Further, the first track is a groove structure arranged on the upper side surface of the top wall of the liquid storage cavity;

[0023] The display assembly further comprises: a cover made of a transparent material and covering the upper portion of the groove structure to form a receiving cavity.

[0024] Furthermore, the display component also includes a scale mark;

[0025] The scale mark is arranged on the upper surface of the top wall of the liquid storage cavity and is located at the edge of the first track.

[0026] On the other hand, a dispensing device is also provided, which includes the above-mentioned liquid level height display component.

[0027] The delivery device provided by the present invention has a simple structure and low cost.

[0028] After adopting the above technical scheme, the present invention has the following beneficial effects compared with the prior art.

[0029] 1. The liquid level display assembly provided by the present invention provides a mechanical structure of the liquid level display assembly, which includes a liquid storage chamber and a cursor structure arranged in the liquid storage chamber, and the cursor structure has a floating part and an indicating part connected by transmission. When in use, the floating part detects the liquid level and transmits it to the indicating part, and the user can know the height of the liquid level through the position of the indicating part in the first track. The solution is simple in structure and low in cost.

[0030] 2. The liquid level display assembly provided by the present invention has a connecting portion which is an integrally formed structure and can be bent and reset, so that the floating portion and the indicating portion are transmission-connected, and the liquid level detected by the floating portion is transmitted to the indicating portion.

[0031] 3. The liquid level display assembly provided by the present invention comprises a columnar structure, a second track is formed in the columnar structure, and the vertical section can move along the second track. This solution can prevent the vertical section from bending or other deformation.

[0032] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation of the present invention. Obviously, the drawings described below are only some embodiments. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the accompanying drawings:

[0034] Figure 1 It is an exploded structural diagram of the liquid level display assembly of the present invention;

[0035] Figure 2 It is a schematic diagram of the top view of the structure of the liquid level display assembly of the present invention;

[0036] Figure 3 It is a schematic diagram of the top wall, columnar structure and cursor structure in the liquid level display assembly of the present invention;

[0037] Figure 4 It is a schematic diagram of the related structures of the cursor structure of the present invention;

[0038] Figure 5 It is a schematic diagram of the present invention at a low liquid level;

[0039] Figure 6 It is a schematic diagram of the liquid level in the present invention;

[0040] Figure 7 It is a schematic diagram of the present invention at a high liquid level.

[0041] In the figure: 1, liquid storage chamber; 101; top wall; 102, first track; 103, scale mark; 104, liquid storage tank;

[0042] 2. floating part; 201. round hole; 202. through hole; 203. connecting rib;

[0043] 3. indicating portion; 4. connecting portion; 401. vertical section; 402. horizontal section;

[0044] 5. Columnar structure; 501. First part; 502. Second part; 503. Opening.

[0045] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but are intended to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0047] In the description of the present invention, it should be noted that the directions or positional relationships indicated by terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “vertical”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0048] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] like Figures 1 to 7 As shown, the present invention provides a liquid level display component and a dispensing device.

[0050] Wherein, the display component of the liquid level includes:

[0051] The liquid storage chamber 1 has a first track 102 extending horizontally disposed on its top wall 101;

[0052] The cursor structure includes a floating portion 2 disposed in the liquid storage chamber 1, and an indicating portion 3 movably disposed in the first track 102;

[0053] The indicating part 3 is in transmission connection with the floating part 2 . The floating part 2 moves up and down as the liquid level in the liquid storage chamber 1 changes, driving the indicating part 3 to move horizontally along the first track 102 .

[0054] The liquid level display component provided by the present invention has a simple structure and low cost.

[0055] A delivery device is also provided, and the delivery device also includes the above-mentioned liquid level display component.

[0056] Embodiment 1

[0057] like Figure 1 and Figure 2 As shown, this embodiment provides a liquid level display component.

[0058] The liquid level display component of this embodiment includes:

[0059] The liquid storage chamber 1 has a first track 102 extending horizontally disposed on its top wall 101;

[0060] The cursor structure includes a floating portion 2 disposed in the liquid storage chamber 1, and an indicating portion 3 movably disposed in the first track 102;

[0061] The indicating part 3 is in transmission connection with the floating part 2 . The floating part 2 moves up and down as the liquid level in the liquid storage chamber 1 changes, driving the indicating part 3 to move horizontally along the first track 102 .

[0062] The liquid level display assembly provided in this embodiment includes a liquid storage chamber 1 and a cursor structure. The liquid storage chamber 1 is a chamber formed by a liquid storage tank 104 surrounded by a shell and a top wall 101 covering the liquid storage tank 104, and the chamber is filled with liquid.

[0063] A first track 102 is horizontally extended on the top wall 101 of the liquid storage chamber 1 , and an indicator 3 is disposed in the first track 102 .

[0064] The liquid level display assembly also includes a cursor structure, which includes a floating part 2 and an indicating part 3 that are transmission-connected. The floating part 2 is arranged in the liquid storage chamber 1, and the indicating part 3 is arranged in the first track 102 and can move left and right along the first track 102.

[0065] When in use, the floating part contacts the liquid in the liquid storage chamber, and the liquid provides buoyancy for the floating part so that it floats on the surface of the liquid. When the liquid in the liquid storage chamber drops, the floating part moves downward with the liquid, driving the indicating part to move to the left along the first track. When the liquid in the liquid storage chamber rises, the floating part moves upward with the liquid, driving the indicating part to move to the right along the first track. The user can judge the height of the liquid in the liquid storage chamber based on the moving direction of the indicating part and its position in the first track. The structure is simple and the cost is low.

[0066] In the solution of this embodiment, a recessed structure is provided on the bottom wall of the liquid storage tank 104. When the buoyancy of the liquid surface in the liquid storage chamber 1 is smaller than the gravity of the cursor structure, the floating portion 2 of the cursor structure sinks into the recessed structure.

[0067] The solution of this embodiment also includes: the first track 102 is a groove structure arranged on the upper surface of the top wall 101 of the liquid storage chamber 1;

[0068] The display assembly further comprises: a cover made of a transparent material and covering the upper portion of the groove structure to form a receiving cavity.

[0069] In the solution of this embodiment, a groove structure is horizontally extended on the top wall 101 of the liquid storage chamber 1, and the inner surface of the groove structure is a smooth arc surface, and a first track 102 is formed in the groove.

[0070] The display assembly further comprises a cover which is made of a transparent material. When installed, the cover covers the upper part of the groove structure to form a receiving cavity. The receiving cavity has a first track 102 in which the indicator 3 moves.

[0071] In this solution, since the cover is provided, water or dust can be prevented from entering the accommodating cavity. Since the cover is made of transparent material, the user can observe the movement of the indicator through the cover, so as to clearly know the height of the liquid in the liquid storage cavity.

[0072] like Figure 4 As shown, the solution of this embodiment also includes: the cursor structure also includes a connecting portion 4, and the connecting portion 4 is made of a material that can be bent and deformed;

[0073] One end of the connecting portion 4 is fixedly connected to the floating portion 2 , and the other end is connected to the indicating portion 3 .

[0074] Also included is a second track extending vertically, the second track being in communication with the first track 102;

[0075] The connecting part 4 is limited within the first track 102 and the second track to form a vertical section 401 and a horizontal section 402 that are vertically connected; the floating part 2 moves up and down, driving the connecting part 4 to move, so that the lengths of the vertical section 401 and the horizontal section 402 change.

[0076] In the solution of this embodiment, the cursor structure further includes a connecting portion 4 , one end of which is fixedly connected to the floating portion 2 , and the other end of which is fixedly connected to the indicating portion 3 .

[0077] In the solution of this embodiment, the diameter of the indicating portion 3 is greater than the diameter of the connecting portion 4 .

[0078] A limiting portion is provided in the first track 102. In this solution, a semicircular limiting rib is provided on the groove structure and the cover, and when the cover is covered on the groove structure, the limiting rib forms a circular limiting portion to prevent the indicator 3 from leaving the first track 102 when the liquid level drops to the lowest position.

[0079] The connecting portion 4 is made of a material that can be bent and deformed. For example, the connecting portion 4 is made of nylon.

[0080] Due to the particularity of the material of the connection part 4, the connection part 4 can be bent and deformed under the action of an external force. When the external force disappears, the connection part 4 returns to its original state from the bent state.

[0081] The liquid level display assembly provided in this embodiment further includes a second track, which is connected to the first track 102. The second track is arranged in the liquid storage chamber 1 and extends in the vertical direction.

[0082] The connecting portion 4 is integrally formed and arranged in the first track 102 and the second track, thereby forming a vertical section 401 and a horizontal section 402 that are vertically connected. The vertical section 401 is arranged in the second track and moves along the second track in the vertical direction. The horizontal section 402 is arranged in the first track 102 and moves along the first track 102 in the horizontal direction. The floating portion 2 is fixedly connected to the end of the vertical section 401, and the indicating portion 3 is fixedly connected to the end of the horizontal section 402. The floating portion 2 moves up and down, driving the connecting portion 4 to move, so that the lengths of the vertical section 401 and the horizontal section 402 change.

[0083] When in use, the horizontal section 402 and the indicator 3 are both arranged in the first track 102. When the liquid in the liquid storage chamber 1 drops, the floating part 2 and the vertical section 401 move downward with the liquid, and the vertical section 401 pulls the horizontal section 402 downward, so that the horizontal section 402 drives the indicator 3 to move to the left along the first track 102. In other words, when the liquid level drops, the horizontal section 402 is converted into the vertical section 401 under the action of external force, the length of the vertical section 401 becomes longer, and the length of the horizontal section 402 becomes shorter.

[0084] When the liquid in the liquid storage chamber 1 rises, the floating part 2 and the vertical section 401 move upward with the liquid. When the vertical section 401 moves upward, it hits the cover, and the cover exerts a force on the vertical section 401, so that part of the vertical section 401 is converted into a horizontal section 402, pushing the indicator 3 to move to the right along the first track 102. In other words, when the liquid level rises, the vertical section 401 is converted into a horizontal section 402 under the action of external force, the length of the horizontal section 402 becomes longer, and the length of the vertical section 401 becomes shorter.

[0085] like Figure 3 As shown, the solution of this embodiment also includes: the display component also includes:

[0086] The columnar structure 5 is vertically extended downward from the top wall 101 of the liquid storage chamber 1 , and the interior of the columnar structure 5 is hollow to form the second track.

[0087] In this solution, the display assembly further includes a columnar structure 5. The columnar structure 5 is vertically extended downward from the top wall 101 of the liquid storage chamber 1, and is hollow inside, and extends along the axial direction of the columnar structure 5 to form a second track. The vertical section 401 is arranged inside the columnar structure 5 and moves along the second track. One end of the columnar structure 5 is connected to one end of the first track 102, so that the vertical section 401 and the horizontal section 402 are connected to each other and can be converted to each other.

[0088] In the solution of this embodiment, the vertical section 401 is arranged in the second track, thereby preventing the liquid or other components from exerting force on the vertical section 401 to cause the vertical section 401 to deform and thus affect the accuracy of liquid level detection. This solution ensures the accuracy of liquid level detection and improves the user experience.

[0089] The solution of this embodiment also includes: the cross-sectional area of ​​the floating part 2 is larger than the cross-sectional area of ​​the vertical section 401 , and the vertical section 401 is connected to the central area of ​​the floating part 2 .

[0090] A through hole 202 penetrating the floating part 2 is disposed outside the central area of ​​the floating part 2 , and the columnar structure 5 is inserted into the through hole 202 .

[0091] The columnar structure 5 has an opening 503 in communication with the second track, and the opening 503 is extended along the axial direction of the columnar structure 5;

[0092] The floating portion 2 is provided with a connecting rib 203 , and the connecting rib 203 is provided corresponding to the opening 503 .

[0093] The following is a detailed description of the above scheme:

[0094] In the solution of this embodiment, an opening 503 is provided on the columnar structure 5 , and the opening 503 is communicated with the second track and is extended along the axial direction of the columnar structure 5 .

[0095] It is worth noting that the columnar structure 5 includes two parts, a first part 501 and a second part 502 arranged from top to bottom. The first part 501 and the second part 502 are both hollow structures. The first part 501 is connected to the first track 102, and the opening 503 is only arranged on the second part 502.

[0096] In the above solution, only one opening 503 is provided.

[0097] In a preferred solution of this embodiment, two openings 503 are symmetrically arranged on the second portion 502 .

[0098] In the solution provided in this embodiment, the cross-sectional area of ​​the floating part 2 is larger than the cross-sectional area of ​​the vertical section 401. In other words, the floating part 2 has a large cross-sectional area and a large contact area with the liquid surface, so it can float on the liquid surface more stably.

[0099] A circular hole 201 is provided in the central area of ​​the floating portion 2 , and the vertical section 401 is inserted into the circular hole 201 for fixed connection.

[0100] In one solution of this embodiment, the middle area of ​​the floating portion 2 is made of rubber or other flexible materials and has a certain amount of deformation, and the vertical section 401 and the circular hole 201 are interference fit to achieve a fixed connection.

[0101] In another solution of this embodiment, an internal thread is provided in the circular hole 201 , an external thread is provided at the end of the vertical section 401 , and the end of the vertical section 401 is inserted into the circular hole 201 for threaded connection.

[0102] In the above solution, the floating part 2 is also provided with a through hole 202 and a connecting rib 203 penetrating therethrough. The through hole 202 is provided between the central area of ​​the floating part 2 and the outer edge of the floating part 2.

[0103] In the solution of this embodiment, a through hole 202 is provided on the floating part 2, and a connecting rib 203 is also provided. The connecting rib 203 connects the area where the circular hole 201 of the vertical section 401 is installed and the outer edge area of ​​the through hole 202, so that the through hole 202 cannot form a circular ring structure. In addition, the through hole 202 is an arc-shaped structure obtained with the floating part 2 as the center, so that the columnar structure 5 can be inserted into the through hole 202.

[0104] In the preferred solution of this embodiment, two openings 503 are symmetrically arranged in the second part 502 of the columnar structure 5. Two through holes 202 are symmetrically arranged on the floating part 2, and two connecting ribs 203 are symmetrically arranged. The two through holes 202 are separated by two connecting ribs 203.

[0105] In the solution provided in this embodiment, the vertical section 401 is arranged in the columnar structure 5. The portion between the center of the floating part 2 and the through hole 202 is arranged in the cylindrical structure, and the area from the through hole 202 to the outer edge of the floating part 2 is arranged outside the columnar structure 5. When the vertical section 401 moves up and down in the vertical direction along the second track, the area from the through hole 202 to the outer edge of the floating part 2 moves up and down along the outer side wall of the columnar structure 5, and the connecting rib 203 on the floating part 2 moves vertically along the opening 503 of the columnar structure 5.

[0106] The solution of this embodiment also includes: the display component also includes a scale mark 103;

[0107] The scale mark 103 is disposed on the upper surface of the top wall 101 of the liquid storage chamber 1 and is located at the edge of the first track 102 .

[0108] In the solution provided in this embodiment, the display component also includes a scale mark 103, and the scale mark 103 is arranged on the upper surface of the top wall 101 of the liquid storage chamber 1.

[0109] like Figure 5-7 As shown, the scale mark 103 is arranged along the edge of the first track 102, and the marks of the low liquid level, the middle liquid level and the high liquid level are arranged from left to right. When the height of the liquid in the liquid storage chamber 1 is different, the indicator 3 points to the corresponding low liquid level, the middle liquid level and the high liquid level mark. When in use, the user can clearly know the current liquid level by which scale mark 103 the indicator 3 moves to.

[0110] Of course, in other solutions of this embodiment, the scale mark 103 can be more accurate. For example, the scale mark 103 can be a specific height value of the liquid level.

[0111] The solution provided in this embodiment is that the liquid level display component is easy to use, simple in structure and low in cost.

[0112] Embodiment 2

[0113] This embodiment provides a delivery device.

[0114] The dispensing device provided in this embodiment includes the liquid level display component described in the first embodiment.

[0115] The dispensing device provided in this embodiment is a clothing treatment agent dispensing device, which is usually installed on clothing treatment equipment such as a washing machine, and is used to dispense clothing treatment agent into the interior of the clothing treatment equipment.

[0116] When in use, the user adds the laundry treatment agent into the liquid storage chamber 1. When the user performs washing operations, the liquid storage chamber 1 puts the laundry treatment agent into the laundry treatment device. The user can see the change of the amount of the laundry treatment agent in the liquid storage chamber 1 through the liquid level display component.

[0117] Since the above-mentioned liquid level display component is provided in the dispensing device, the overall manufacturing cost is reduced.

[0118] The above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment, it is not used to limit the present invention. Any technician familiar with this patent can make some changes or modify the technical contents suggested above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the solution of the present invention.

Claims

1. A liquid level display assembly, characterized in that: include: A liquid storage chamber, a first track extending horizontally is arranged on the top wall thereof; A cursor structure, comprising a floating portion disposed in the liquid storage cavity, and an indicating portion movably disposed in the first track; The indicating part is in transmission connection with the floating part, and the floating part moves up and down as the liquid level in the liquid storage chamber changes, driving the indicating part to move horizontally along the first track.

2. The liquid level display assembly according to claim 1, characterized in that: The cursor structure also includes a connecting portion, and the connecting portion is made of a material that can be bent and deformed; One end of the connecting part is fixedly connected to the floating part, and the other end is connected to the indicating part.

3. The liquid level display assembly according to claim 2, characterized in that: Also included is a second track extending vertically, the second track being in communication with the first track; The connecting part is limited within the first track and the second track to form a vertical section and a horizontal section that are vertically connected; the floating part moves up and down, driving the connecting part to move, so that the lengths of the vertical section and the horizontal section change.

4. The liquid level display assembly according to claim 3, characterized in that: The display assembly shown also includes: The columnar structure is vertically extended downward from the top wall of the liquid storage cavity, and the interior of the columnar structure is hollow to form the second track.

5. The liquid level display assembly according to claim 4, characterized in that: The cross-sectional area of ​​the floating portion is greater than the cross-sectional area of ​​the vertical section, and the vertical section is connected to the central area of ​​the floating portion.

6. The liquid level display assembly according to claim 5, characterized in that: A through hole penetrating the floating part is arranged outside the central area of ​​the floating part, and the columnar structure is inserted into the through hole.

7. The liquid level display assembly according to claim 6, characterized in that: The columnar structure has an opening connected to the second track, and the opening is extended along the axial direction of the columnar structure; The floating portion is provided with connecting ribs, and the connecting ribs are arranged corresponding to the openings.

8. The liquid level display assembly according to claim 1, characterized in that: The first track is a groove structure arranged on the upper side surface of the top wall of the liquid storage cavity; The display assembly further comprises: a cover made of a transparent material and covering the upper portion of the groove structure to form a receiving cavity.

9. The liquid level display assembly according to claim 8, characterized in that: The display assembly also includes a scale mark; The scale mark is arranged on the upper surface of the top wall of the liquid storage cavity and is located at the edge of the first track.

10. A delivery device, characterized in that: The delivery device comprises a liquid level display assembly as described in any one of claims 1 to 9.

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