Sparkling water machine

Abstract

The present invention relates to the technical field of household appliances, and specifically to a bubble water machine, comprising: a gas cylinder joint; a container joint, the container joint and the gas cylinder joint are connected by an inflation tube; an inflation structure, having an inflation position for connecting the gas cylinder joint and the container joint, and an initial position for disconnecting the gas cylinder joint and the container joint; a bracket, fixedly arranged above the container joint, and having a first connection part and a second connection part on the bracket from top to bottom; a button, movably arranged in the bracket, and having mounting parts respectively fixedly connected with the first connection part and the second connection part; a pressing lever, one end of which is linked to the button, and the other end of which is linked to the inflation structure, and under the action of the button, the pressing lever is suitable for driving the inflation structure to move from the initial position to the inflation position; and a pressure relief valve, fixedly arranged on the bracket. When inflating the water bottle, there is no need to press the button all the time, which can improve the user experience.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliances, and in particular to a bubble water machine. Background Art

[0002] With the continuous progress of science and technology and the continuous improvement of people's living water bottles, household sparkling water machines that can make sparkling water are increasingly widely used in people's lives. Among them, the sparkling water machine dissolves carbon dioxide gas in water to form cool and refreshing sparkling water.

[0003] The principle of the existing bubble water machine is: manually press the air intake pressure rod to drive the air intake ejector to move and open the carbon dioxide cylinder. At this time, the carbon dioxide gas is dissolved into the pure water through the air intake pipe, the container joint, and the air intake nozzle. When the pressure in the water bottle increases to greater than or equal to the set value (0.6-0.8Mpa), the high-pressure gas goes through the exhaust pipe to the automatic pressure relief valve. Under the action of high pressure, the valve core of the automatic pressure relief valve is pushed to connect the valve. The high-pressure gas in the cylinder flows into the air through the automatic pressure relief valve, so that the air pressure in the cylinder is not higher than the set value. After stopping pressing the inflation button, the air pressure in the cylinder is maintained near the set value through the action of the automatic pressure relief valve, and then the pressure is released through the manual pressure relief valve, so that the air pressure in the cylinder is reduced to atmospheric pressure or a safe value. The manual pressure relief valve of some bubble water machines is linked to the button. When the button is stopped, the manual pressure relief valve is automatically connected.

[0004] During this operation, the operator must keep pressing the inflation button until he hears the automatic pressure relief valve start to deflate. If the pressing time is insufficient, the air pressure in the bottle is low and insufficient CO2 is dissolved in the water. If the pressing time is too long, a large amount of CO2 flows into the air through the automatic pressure relief valve, causing waste and a poor user experience. Summary of the invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defects of the prior art bubble water machine that requires pressing the button continuously during the inflation process, resulting in poor user experience, thereby providing a bubble water machine that does not require pressing the button continuously and can improve user experience.

[0006] In order to solve the above technical problems, the present invention provides a bubble water machine, comprising:

[0007] Gas cylinder connector, suitable for installing gas cylinders;

[0008] A container joint, the container joint is connected to the gas cylinder joint through an inflation tube, and the container joint is suitable for mounting a water bottle;

[0009] an inflation structure, movably disposed on the gas cylinder joint, and having an inflation position for connecting the gas cylinder joint with the container joint, and an initial position for disconnecting the gas cylinder joint from the container joint;

[0010] A bracket, fixedly arranged above the container joint, wherein the bracket is provided with a first connection portion corresponding to the initial position and a second connection portion corresponding to the inflation position from top to bottom;

[0011] A button is movably arranged in the bracket, and the button is provided with a mounting portion which is respectively matched and fixedly connected with the first connecting portion and the second connecting portion;

[0012] A pressing lever, one end of which is linked to the button and the other end of which is linked to the inflatable structure. Under the action of the button, the pressing lever is suitable for driving the inflatable structure to move from the initial position to the inflated position;

[0013] The pressure relief valve is fixedly arranged on the bracket, comprising a first shell, and a first valve core rod movably arranged in the first shell, wherein the first shell is provided with an air inlet and an air outlet, wherein the air inlet is suitable for connecting with the water bottle, and the air outlet is suitable for connecting with the outside world;

[0014] The first valve core rod has an inflated state corresponding to the inflated position, and in the inflated state, the button presses against the top end of the first valve core rod so that the first valve core rod closes the connection between the air inlet and the air outlet;

[0015] And a pressure relief state corresponding to the initial position, in which the first valve core rod connects the air inlet and the air outlet.

[0016] Optionally, the first connecting portion and the second connecting portion are respectively suitable for snap-fitting with the mounting portion.

[0017] Optionally, the first connecting portion is a first slot, the second connecting portion is a second slot, and the mounting portion is a buckle.

[0018] Optionally, the first connection parts and the second connection parts are evenly provided in plurality, and the number of the mounting parts matches the number of the first connection parts and the second connection parts.

[0019] Optionally, a first elastic member is provided between the button and the bracket.

[0020] Optionally, a sealing gasket is provided at the end of the first shell located at the air inlet, and the sealing gasket is located at the lower side of the first valve core rod and between the air inlet and the air outlet.

[0021] Optionally, the first shell includes an upper shell and a lower shell that are connected to each other, the top end of the lower shell extends into the upper shell, the air inlet is arranged in the lower shell and passes through the lower shell from bottom to top, the sealing gasket is arranged at the top end of the lower shell, and the air outlet and the first valve core rod are both arranged in the upper shell.

[0022] Optionally, the upper shell is connected to the lower shell by threads.

[0023] Optionally, a groove is provided at the lower end of the first valve core rod, and the sealing gasket comprises a main body and a protrusion suitable for embedding in the groove.

[0024] Optionally, the inflation structure is an inflation valve, which includes a second shell and a second valve core rod movably arranged in the second shell, the second shell is fixedly connected to the gas cylinder connector, and the top end of the second valve core rod is in contact with the pressing lever.

[0025] Optionally, a second elastic member is provided between the second shell and the pressing lever.

[0026] The technical solution of the present invention has the following advantages:

[0027] 1. The bubble water machine provided by the present invention, when the water bottle needs to be inflated, the button is pressed, and the button moves downward from the position where it is connected to the first connecting part to the position where it is connected to the second connecting part. At this time, the button can be released, and the button remains in the connection position where it is fixed with the second connecting part. During the downward movement of the button, the pressing lever is driven to move downward, and the pressing lever drives the inflation structure to move to the inflation position. At this time, the gas cylinder joint is connected to the container joint, and the CO2 in the gas cylinder is filled into the water bottle. It should be noted that the water bottle can store pure water or drinks such as juice, and at this time the button is pressed against the top end of the first valve core rod, and the pressure relief valve remains in a closed state, which can effectively inflate the water bottle. When the air pressure in the water bottle reaches the set value (0.6-0.8Mpa), the first valve core rod is pushed up under the action of high pressure, driving the button to move upward, and the pressure relief valve is opened at this time, and the gas in the water bottle enters the outside air through the pressure relief valve to release the pressure until the air pressure in the water bottle reaches a safe value, and the aerated bubble water can be safely removed, and when the button moves upward, the linkage pressing lever moves to stop the inflation structure from inflating, and the entire inflation process is completed. The bubble water machine in this embodiment does not need to press the button all the time when inflating the water bottle, which can improve the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 is a cross-sectional view of a bubble water machine provided in an embodiment of the present invention;

[0030] Figure 2 for Figure 1 An exploded view of the partial structure shown;

[0031] Figure 3 for Figure 1 A partial cross-sectional view of the sparkling water machine shown with the button not pressed;

[0032] Figure 4 for Figure 1 A partial cross-sectional view of the sparkling water machine button shown being pressed;

[0033] Figure 5 for Figure 1 A cross-sectional view of a pressure relief valve is shown.

[0034] Description of reference numerals:

[0035] 1. Gas cylinder; 2. Inflating valve; 3. Water bottle; 4. Container joint; 5. Inflating tube; 6. Bracket; 61. First card slot; 62. Second card slot; 7. Button; 71. Buckle; 8. Pressing lever; 9. Pressure relief valve; 91. Upper shell; 92. Lower shell; 93. First valve core rod; 94. Air inlet; 95. Air outlet; 96. Sealing pad; 10. First elastic member; 11. Pressure relief port. DETAILED DESCRIPTION

[0036] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "water bottle", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0038] 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0040] Example 1

[0041] This embodiment provides a bubble water machine. In one embodiment, Figures 1 to 5 As shown, the sparkling water machine includes a gas cylinder joint, a container joint 4, an inflation structure, a bracket 6, a button 7, a pressing lever 8, and a pressure relief valve 9.

[0042] Among them, the gas cylinder joint is suitable for installing the gas cylinder 1; the container joint 4 is connected to the gas cylinder joint through an inflation tube 5, and the container joint 4 is suitable for installing the water bottle 3; the inflation structure is movably arranged on the gas cylinder joint, and has an inflation position that makes the gas cylinder joint and the container joint 4 conductive, and an initial position that makes the gas cylinder joint and the container joint 4 disconnected; the bracket 6 is fixedly arranged above the container joint 4, and the bracket 6 is provided with a first connecting part corresponding to the initial position and a second connecting part corresponding to the inflation position from top to bottom; the button 7 is movably arranged in the bracket 6, and the button 7 is provided with mounting parts that are respectively fixedly connected with the first connecting part and the second connecting part; one end of the pressing lever 8 is linked to the button 7, and the other end is linked to the inflation structure, and the button is pressed. 7, the pressing lever 8 is suitable for driving the inflation structure to move from the initial position to the inflation position; the pressure relief valve 9 is fixedly arranged on the bracket 6, including a first shell, a first valve core rod 93 which is movably arranged in the first shell, and an air inlet 94 and an air outlet 95 are provided on the first shell, the air inlet 94 is suitable for connecting with the water bottle 3, and the air outlet 95 is suitable for connecting with the outside world; the first valve core rod has an inflation state corresponding to the inflation position, in which the button is pressed against the top end of the first valve core rod so that the first valve core rod closes the conduction between the air inlet and the air outlet; and a pressure relief state corresponding to the initial position, in which the first valve core rod conducts the air inlet and the air outlet.

[0043] Specifically, the air inlet 94 of the pressure relief valve 9 is connected to the pressure relief port 11 of the container connector 4 through a pipeline.

[0044] In this embodiment, when the water bottle 3 needs to be inflated, the button 7 is pressed, and the button 7 moves downward from the position where it is connected with the first connecting part to the position where it is connected with the second connecting part. At this time, the button 7 can be released. Figure 3As shown, the button 7 is kept in a connection position fixed with the second connection part. In the process of the button 7 moving downward, the pressing lever 8 is driven to move downward, and the pressing lever 8 drives the inflation structure to move to the inflation position. At this time, the gas cylinder joint is connected with the container joint 4, and the CO2 in the gas cylinder 1 is filled into the water bottle 3. It should be noted that the water bottle 3 can store pure water or beverages such as juice, and at this time, the button 7 is pressed against the top of the first valve core rod 93, and the pressure relief valve 9 is kept in a closed state, which can effectively inflate the water bottle 3. When the air pressure in the water bottle 3 reaches the set value (0.6-0.8Mpa), the first valve core rod 93 is pushed upward under the action of high pressure, driving the button 7 to move upward. At this time, the pressure relief valve 9 is opened, and the gas in the water bottle 3 enters the outside air through the pressure relief valve 9 for pressure relief, until the air pressure in the water bottle 3 reaches a safe value, and the gas-filled bubble water can be safely removed, and when the button 7 moves upward, the linkage pressing lever 8 moves, so that the inflation structure stops inflating, and the whole inflation process is completed. The sparkling water machine in this embodiment does not need to keep pressing the button 7 when inflating the water bottle 3, which can improve the user experience.

[0045] On the basis of the above-mentioned embodiments, in a preferred embodiment, the first connection part and the second connection part are respectively suitable for snapping with the mounting part. In this embodiment, the connection method between the first connection part and the second connection part is relatively simple. In an alternative embodiment, the first connection part and the second connection part are respectively suitable for connecting with the mounting part through magnetic adsorption. For example, the first connection part and the second connection part are respectively magnetic adsorption parts that can be mutually adsorbed with magnets, and can be magnets or structures made of materials such as iron, cobalt, and nickel. When the first connection part and the second connection part are magnets, the mounting part can be a magnet or a structure made of materials such as iron, cobalt, and nickel; when the first connection part and the second connection part are structures made of materials such as iron, cobalt, and nickel, the mounting part is a magnet.

[0046] On the basis of the above embodiment, in a preferred embodiment, the first connection portion is a first card slot 61, the second connection portion is a second card slot 62, and the mounting portion is a buckle 71. In this embodiment, the mounting portion of the button 7 is initially inserted into the first card slot 61, and when the button 7 is pressed and moves downward, the mounting portion of the button 7 is inserted into the second card slot 62. In an alternative embodiment, the first connection portion and the second connection portion are buckles, and the second connection portion is a card slot.

[0047] On the basis of the above embodiment, in a preferred embodiment, the first connection part and the second connection part are evenly provided with a plurality of them, and the number of the mounting part matches the number of the first connection part and the second connection part. In this embodiment, by making the button 7 and the bracket 6 have a plurality of connection positions, it can be ensured that when the button 7 is pressed, the force on the button 7 is balanced, and the button 7 can move downward smoothly.

[0048] Specifically in one embodiment, the first connection portion and the second connection portion are evenly provided with three, and correspondingly, the number of the mounting portions is also three. Figure 2 The number of the buckles 71 on the button 7 is three, the number of the first card slots 61 at the upper layer and the number of the second card slots 62 at the lower layer are both three.

[0049] On the basis of the above-mentioned embodiment, in a preferred embodiment, a first elastic member 10 is provided between the button 7 and the bracket 6. In this embodiment, by providing the first elastic member 10 between the button 7 and the bracket 6, when the button 7 is pressed, the button 7 moves downward, and when the button 7 moves downward from the position where it is matched with the first connecting part to the position where it is matched with the second connecting part, the first elastic member 10 generates a reset force, and when the air pressure in the water bottle 3 reaches the set value (0.6-0.8Mpa), the first valve core rod 93 is pushed upward under the action of high pressure, and when the button 7 is driven to move upward, the reset force of the first elastic member 10 can cause the button 7 to be reset to the position where it is matched with the first connecting part.

[0050] On the basis of the above-mentioned embodiment, in a preferred embodiment, a sealing gasket 96 is provided at the end of the first housing at the air inlet 94, and the sealing gasket 96 is located at the lower side of the first valve core rod 93 and between the air inlet 94 and the air outlet 95. In this embodiment, by providing the sealing gasket 96 at the end of the air inlet 94, when the button 7 moves downward to the position matched with the second connecting part, the button 7 presses against the top of the first valve core rod 93, and the first valve core rod 93 compresses the sealing gasket 96, thereby ensuring that the air inlet 94 of the pressure relief valve 9 is isolated from the air outlet 95 and does not release pressure; when the air pressure in the water bottle 3 reaches the set value (0.6-0.8Mpa), the sealing gasket 96 is pushed up by the air pressure, driving the first valve core rod 93 to move upward, at which time the air inlet 94 of the pressure relief valve 9 is connected with the air outlet 95, and pressure relief begins. Of course, in other replaceable embodiments, the sealing gasket 96 may not be provided, and the bottom end of the first valve core rod 93 is pressed against the upper end of the air inlet 94.

[0051] On the basis of the above embodiment, in a preferred embodiment, the first housing includes an upper housing 91 and a lower housing 92 that are connected to each other, the top end of the lower housing 92 extends into the upper housing 91, the air inlet 94 is provided in the lower housing 92 and penetrates the lower housing 92 from bottom to top, the sealing gasket 96 is provided at the top end of the lower housing 92, and the air outlet 95 and the first valve core rod 93 are both provided in the upper housing 91. This arrangement of the embodiment can facilitate the assembly of the pressure relief valve 9 itself.

[0052] In a preferred embodiment, the upper shell 91 and the lower shell 92 are connected by threads. Figure 5As shown, the upper shell 91 is provided with an internal thread, and the top end of the lower shell 92 is provided with an external thread. During assembly, the valve core rod is inserted from the bottom opening of the upper shell 91, and then the sealing gasket 96 is placed on the end of the valve core rod or on the top end of the lower shell 92, and then the upper shell 91 and the lower shell 92 are connected by threads.

[0053] Further references Figure 5 The lower end of the first valve core rod 93 is provided with a groove, and the sealing gasket 96 includes a main body and a protrusion suitable for being embedded in the groove. This arrangement facilitates the fixing of the position of the sealing gasket 96 and facilitates installation. Of course, in other replaceable embodiments, the lower end of the first valve core rod 93 is a plane, and the sealing gasket 96 is arranged at the lower end of the first valve core rod 93.

[0054] On the basis of the above-mentioned embodiments, in a preferred embodiment, the inflation structure is an inflation valve 2, and the inflation valve 2 includes a second housing, a second valve core rod movably disposed in the second housing, the second housing is fixedly connected to the gas cylinder joint, and the top end of the second valve core rod is in contact with the pressing lever 8. In this embodiment, when the button 7 moves downward, the pressing lever 8 is driven to move downward, and the pressing lever 8 drives the second valve core rod to move downward, so that the gas cylinder 1 is connected with the inflation tube 5. When the button 7 moves upward under the push of the first valve core rod 93 and the reset force of the first elastic member 10, the pressing lever 8 moves upward, releases the pressing on the second valve core rod, and can drive the second valve core rod to move upward, and stops inflation. In an alternative embodiment, the rotation axis of the lever is set in the middle of the pressing lever 8, and the inflation structure can be a plate-shaped member connected to the pressing lever 8, and the plate-shaped member can press the inflation tube 5. When the button 7 moves downward, the part of the pressing lever 8 connected to the button 7 rotates downward, and the part connected to the plate-shaped member rotates upward. The plate-shaped member leaves the inflation tube 5 as it moves upward, and the gas cylinder 1 is connected to the water bottle 3, and inflation begins. When the air pressure in the water bottle 3 reaches the set value (0.6-0.8Mpa), the first valve core rod 93 pushes up under the action of high pressure, driving the button 7 to move upward, the part of the pressing lever 8 connected to the button 7 rotates upward, and the part connected to the plate-shaped member rotates downward, and the plate-shaped member presses the inflation tube 5, the inflation tube 5 is blocked, and inflation stops.

[0055] On the basis of the above embodiment, in a preferred embodiment, a second elastic member is provided between the second housing and the pressing lever 8. In this embodiment, when the button 7 moves upward under the pushing of the first valve core rod 93 and the restoring force of the first elastic member 10, the pressing lever 8 moves upward, releasing the pressing on the second valve core rod, and the force of the second elastic member can cause the pressing lever 8 to move upward.

[0056] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A bubble water machine, characterized in that: include: A gas cylinder connector, suitable for mounting a gas cylinder (1); A container joint (4), the container joint (4) being connected to the gas bottle joint via an inflation tube (5), and the container joint (4) being suitable for mounting the water bottle (3); an inflation structure, movably arranged on the gas cylinder joint, and having an inflation position for connecting the gas cylinder joint with the container joint (4) and an initial position for disconnecting the gas cylinder joint from the container joint (4); A bracket (6) is fixedly arranged above the container joint (4), and the bracket (6) is provided with a first connection portion corresponding to the initial position and a second connection portion corresponding to the inflation position from top to bottom; A button (7) is arranged in the bracket (6) so as to be movable up and down, and the button (7) is provided with a mounting portion which is respectively matched and fixedly connected with the first connecting portion and the second connecting portion; A pressing lever (8), one end of which is linked to the button (7) and the other end of which is linked to the inflatable structure. Under the action of the button (7), the pressing lever (8) is suitable for driving the inflatable structure to move from the initial position to the inflated position; The pressure relief valve (9) is fixedly arranged on the bracket (6), comprising a first shell, and a first valve core rod (93) arranged in the first shell so as to be movable up and down, wherein the first shell is provided with an air inlet (94) and an air outlet (95), wherein the air inlet (94) is suitable for being connected to the water bottle (3), and the air outlet (95) is suitable for being connected to the outside world; The first valve core rod (93) has an inflated state corresponding to the inflated position, and in the inflated state, the button (7) presses against the top end of the first valve core rod (93) so that the first valve core rod (93) closes the connection between the air inlet (94) and the air outlet (95); and a pressure relief state corresponding to the initial position. In the pressure relief state, the first valve core rod (93) connects the air inlet (94) and the air outlet (95). When the button (7) is pressed, the button (7) moves downward from a position where it is connected to the first connecting portion to a position where it is connected to the second connecting portion. When the air pressure in the water bottle (3) reaches a set value, the first valve core rod (93) is pushed upward under the action of the air pressure, driving the button (7) to move upward.

2. The bubble water machine according to claim 1, characterized in that: The first connecting portion and the second connecting portion are respectively suitable for being snap-fitted with the mounting portion.

3. The bubble water machine according to claim 2, characterized in that: The first connection portion is a first clamping slot (61), the second connection portion is a second clamping slot (62), and the mounting portion is a buckle (71).

4. The bubble water machine according to claim 1, characterized in that: The first connection parts and the second connection parts are evenly provided in plurality, and the number of the mounting parts matches the number of the first connection parts and the second connection parts.

5. The bubble water machine according to claim 1, characterized in that: A first elastic member (10) is provided between the button (7) and the bracket (6).

6. The sparkling water machine according to any one of claims 1 to 5, characterized in that: A sealing gasket (96) is provided at the end of the first shell body located at the air inlet (94), and the sealing gasket (96) is located at the lower side of the first valve core rod (93) and between the air inlet (94) and the air outlet (95).

7. The bubble water machine according to claim 6, characterized in that: The first shell body comprises an upper shell (91) and a lower shell (92) which are connected to each other, the top end of the lower shell (92) extends into the upper shell (91), the air inlet (94) is arranged in the lower shell (92) and passes through the lower shell (92) from bottom to top, the sealing gasket (96) is arranged at the top end of the lower shell (92), and the air outlet (95) and the first valve core rod (93) are both arranged in the upper shell (91).

8. The bubble water machine according to claim 7, characterized in that: The upper shell (91) and the lower shell (92) are connected via threads.

9. The sparkling water machine according to claim 6, characterized in that: The lower end of the first valve core rod (93) is provided with a groove, and the sealing gasket (96) comprises a main body and a protrusion suitable for being embedded in the groove.

10. The sparkling water machine according to any one of claims 1 to 5, characterized in that: The inflation structure is an inflation valve (2), which comprises a second shell and a second valve core rod movably arranged in the second shell, the second shell is fixedly connected to the gas cylinder joint, and the top end of the second valve core rod is in contact with the pressing lever (8).

11. The sparkling water machine according to claim 10, characterized in that: A second elastic member is provided between the second shell and the pressing lever (8).

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