Patent Description:
The present invention relates to the technical field of above-ground pools. In particular, apparatuses and methods consistent with exemplary embodiments relate to a water spraying device for an above-ground pool, and an above-ground pool having the water spraying device.

Above-ground pools may be inflatable pools, frame pools, or another type of pool, and are widely used due to convenient installation and good effect of usage. A water spraying device may be mounted on an above-ground pool to spray water into the pool to form a "waterfall", which may be used as a part of water circulation system to circulate the water in the pool, may also provide a massage function.

Such a water spraying device may be fixedly mounted to an inner wall of the pool. On the one hand, since an air chamber of the inflatable pool must remain air-tight, a mounting structure for fastening the water spraying device to the inner wall of an inflatable pool is often complex, and a water supply pipeline of the water spraying device may be difficult to arrange. On the other hand, as time passes, an older inflatable pool may become somewhat deformed, as compared to a new pool, and such deformation may cause a pulling interaction between a mounting structure of a water spraying device and the inner wall of the pool, resulting in that a mounting structure or a pool wall becoming more prone to deformation or damage, and affecting functions of the water spraying device and even threatening the safety of users. Some prior art solutions are known from patent documents <CIT> and <CIT>.

Example embodiments may address at least the above problems and/or disadvantages and other disadvantages not described above. Also, example embodiments are not required to overcome the disadvantages described above, and may not overcome any of the problems described above.

According to a first aspect of an example embodiment, a water spraying device comprises: a sprayer assembly comprising a water inlet end, a water outlet end, and a first magnetic element disposed on the water inlet end; and a mounting assembly comprising a first end, a second end in fluid communication with the first end, and a second magnetic element disposed on the first end of the mounting assembly, wherein the mounting assembly defines therein a water passage to the sprayer assembly; wherein the first magnetic element is mutually attractive to the second magnetic element such that the water inlet end of the sprayer assembly and the first end of the mounting assembly are detachably connectable via the first magnetic element and the second magnetic element.

According to the above first aspect, the present invention may further comprise one or more of the following optional features.

the mounting assembly may further comprise a mount defining the first end of the mounting assembly, and a spherical connector defining the second end of the mounting assembly and adjustably connected to the mount.

The mount may comprise an arc-shaped connecting portion, the spherical connector comprises a ball head having a spherical section corresponding to the arc-shaped connecting portion on the mount, and a connecting section configured to connect to a water inlet pipe.

The spherical connector may further comprise a nut connected to the mount, the spherical section of the ball head is disposed between the mount and the nut, the nut connectable to the mount by means of threading on the nut and the mount; and the connecting section of the ball head extends out of the nut.

The spherical connector may further comprise a pair of ball bushings disposed between the mount and the nut, such that the pair of ball bushings clamp the spherical section when the nut is attached to the mount.

The mounting assembly may further comprise a mount defining the first end of the mounting assembly, the mount comprising an extension portion extending opposite the first end and defining the second end of the mounting assembly.

The water spraying device may further comprise a seal disposed between the second end of the mounting assembly and the water inlet pipe.

The sprayer assembly may further comprise a shell defining a water spraying passage therein, wherein the water inlet end of the sprayer assembly and the water outlet end of the sprayer assembly are in fluid communication through the water spraying passage; wherein the water inlet of the sprayer assembly comprises an opening penetrating the shell, and the water supply passage and the water inlet end are in fluid communication through the opening; wherein the water outlet end comprises a nozzle having a size which decreases toward an outlet end thereof.

The shell may comprise a first shell and a second shell attached to each other, the nozzle is defined by at least one of the first shell and the second shell, and the nozzle is moveable.

The sprayer assembly may further comprise a light-emitting assembly disposed on at least one of a top surface and a bottom surface of the nozzle.

According to an aspect of another example embodiment, an above-ground pool may comprise: a pool bottom and a pool wall surrounding the pool bottom to define a water carrying area, and a water spraying device as described above.

The pool wall may comprise an inner wall and an outer wall defining a closed inflatable chamber therebetween, and a bushing formed through the inflatable chamber and hermetically connected to the inner wall and the outer wall.

According to a further aspect of the invention, complimentary or alternative to the preceding ones, the water spraying device comprises a sprayer assembly comprising a water inlet end and a water inlet end, a water inlet pipe and a mounting assembly comprising a first end connected to the sprayer assembly and a second end connected to the water inlet pipe, wherein the mounting assembly defines therein a water passage to the sprayer assembly.

Preferably, the mounting assembly further comprises a pulling component connecting the water inlet pipe to the sprayer assembly.

Preferably, the sprayer assembly further comprises a shell comprising a first shell and a second shell attached to each other.

Preferably, at least one water delivery pipe in communication with the water inlet pipe is disposed between the first shell and the second shell.

Preferably, the water delivery pipe and the water passage are in fluid communication.

Preferably, the sprayer assembly further comprises a nozzle in communication with the at least one water delivery pipe.

Preferably, the nozzle is configured to extend out of a notch formed in one of the first shell and the second shell.

Preferably, the shell is angled, the nozzle is pivotable, with respect to the one of the first shell and the second shell, between a first state in which the nozzle is accommodated within the notch and a second state in which the nozzle is directed away from the notch facing an inside of a pool body of an above-ground pool.

Preferably, the sprayer assembly further comprises a light-emitting assembly disposed on the nozzle and, more preferably, comprises a transparent rear plate.

The above and/or other aspects will become apparent and more readily appreciated from the following description of example embodiments of the present invention, taken in conjunction with the accompanying drawings, in which:.

Reference will now be made in detail to example embodiments of the present invention which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout. In this regard, the example embodiments may have different forms and may not be construed as being limited to the descriptions set forth herein.

It will be understood that the terms "include," "including", "comprise, and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

It will be further understood that, although the terms "first," "second," "third," etc., may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections may not be limited by these terms.

Various terms are used to refer to particular system components. Different companies may refer to a component by different names - this document does not intend to distinguish between components that differ in name but not function.

Matters of these example embodiments that are obvious to those of ordinary skill in the technical field to which these exemplary embodiments pertain may not be described here in detail.

Herein, an inflatable pool is illustrated and described as an example of an above-ground pool. However, it should be understood that an above-ground pool as referenced herein may be an inflatable pool, a frame pool, or another type of pool, as would be understood by one of skill in the art. Furthermore, an above-ground pool as referenced herein should not be limited to having a shape shown in the figures, but may be any of a circular pool, an oval pool, a rectangular pool, and another polygonal pool.

<FIG> illustrate an example inflatable pool <NUM>. The inflatable pool <NUM> includes a pool bottom <NUM> and a pool wall <NUM> surrounding the pool bottom <NUM> to define a water carrying area <NUM>. The pool wall <NUM> includes an outer wall <NUM> and an inner wall <NUM>. In some embodiments, the outer wall <NUM> and the inner wall <NUM> may define a closed inflatable chamber. In the example embodiment illustrated in the figures, the pool wall <NUM> further includes a top wall <NUM>, wherein the top wall <NUM>, together with the outer wall <NUM>, the inner wall <NUM>, and the pool bottom <NUM> defines an inflatable chamber <NUM>. The inflatable chamber may be a single air chamber surrounding the pool bottom, or may include multiple air sub-chambers. Such various air sub-chambers may be in fluid communication with one another.

A water spraying device is mounted on the pool wall <NUM>, and is supplied with water through a water inlet pipe penetrating the pool wall. One end of the water inlet pipe is connected to a water pump outside the pool body, and the other end of the water inlet pipe is connected to the water spraying device. The water spraying device guides water through a built-in water channel, and sprays water into the pool from a nozzle, such that the water may form a waterfall effect. As shown in this example embodiment, the water inlet pipe <NUM> penetrates the outer wall <NUM> and the inner wall <NUM> of the pool wall <NUM>, and is sealed with the outer wall <NUM> and the inner wall <NUM>. According to an example aspect, in order to ensure an air-tightness of the air chamber, and to facilitate installation of the water inlet pipe and installation of the water spraying device at an end portion of the water inlet pipe, the water inlet pipe <NUM> may traverse a bushing <NUM> to be made to be in communication with a water pump outside the pool body and with a water spraying device inside the pool body. Such a bushing <NUM> may be hermetically connected to the inner wall <NUM> and to the outer wall <NUM> of the pool wall <NUM>, respectively.

The water spraying device may be mounted on an inner side of the pool wall <NUM>, with a water inlet at a lower end and a water outlet at an upper end, so that water is sprayed into the pool in the form of a parabola to achieve a good water spray effect. That is, a mounting point of the water spraying device may be located at a lower end of the water spraying device. <FIG> illustrate a water spraying device according to a first example embodiment. With reference to <FIG>, the water spraying device includes a sprayer assembly <NUM> and a mounting assembly <NUM>. The sprayer assembly <NUM> has a water inlet end <NUM> and a water outlet end <NUM>, and the water outlet end <NUM> is configured to be higher than the water inlet end <NUM>. The mounting assembly <NUM> is provided with a water supply passage for the sprayer assembly <NUM>, and is suitable to be connected to the water inlet pipe <NUM> and connected to the water inlet end <NUM> of the sprayer assembly <NUM>.

According to one or more example aspects, and as shown in <FIG>, the sprayer assembly <NUM> includes a shell <NUM> defining a cavity <NUM> therein which defines a water spraying passage. The water inlet end <NUM> is provided with an opening which penetrates the shell <NUM> and is connectable to the mounting assembly <NUM>, and the water outlet end <NUM> is provided with a nozzle having a size that is reduced gradually toward an outlet, as shown in <FIG>. The shell <NUM> may include a first shell <NUM> and a second shell <NUM> attached to each other, as shown in <FIG>. When the first shell <NUM> is attached to the second shell <NUM>, an integrated nozzle <NUM> is formed at the outlet of the shell, the shell being constructed such that the nozzle <NUM> is suitable to be bent toward the inside of the pool body, thereby facilitating a waterfall effect.

The sprayer assembly <NUM> may further a light-emitting assembly <NUM> arranged at the water outlet end <NUM>. The light-emitting assembly <NUM> is configured such that light emitted therefrom is directed onto water sprayed from the sprayer assembly <NUM>, to provide an ornamental lighting effect of lighting the sprayed water. The light-emitting assembly <NUM> is optionally arranged at one of a top surface and a bottom surface of the nozzle. The light-emitting assembly <NUM> includes, for example, a light-emitting shell <NUM>, a battery <NUM>, a light-emitting element <NUM> such as an LED, and a switch element <NUM> that are accommodated in the light-emitting shell <NUM>. In the illustrated example embodiment, the light-emitting assembly <NUM> is disposed on a bottom surface of the nozzle, and correspondingly, the second shell <NUM> is provided with snap grooves <NUM> at the outlet for accommodating the light-emitting assembly <NUM>. In this manner, as inner surface <NUM> at the outlet of the first shell <NUM> and an inner surface <NUM> at the outlet of the second shell <NUM>, together, form the nozzle <NUM>. It should be understood that in one or more example embodiments, in a case in which there are no other components at the outlet end, the shell may also be constructed to have a size gradually reduced toward the outlet, thus directly forming the nozzle. By narrowing the water spraying passage near the outlet, a water flow can be sped up to increase a dynamic pressure of water, thereby improving a massage effect. Moreover, a flat water column may be more attractive. However, according to one or more example embodiments, the nozzle may be constructed as a shower head or any other form, as would be understood by one of skill in the art.

As described above, the sprayer assembly <NUM> is mounted on an inner side of the pool wall of the above-ground pool through the mounting assembly <NUM>. The water spraying device may be configured to connect to the inner wall of the pool only at the position of the mounting assembly, so as to reduce a connection stress at a joint between the sprayer assembly and the mounting assembly. This allows the sprayer assembly to have degrees of freedom of motion within a certain range relative to the pool wall. When the pool deforms after long-term use and squeezes the sprayer assembly, or the sprayer assembly is impacted by an external force, breaking of a connection position between the water spraying device and the pool is avoided since the sprayer assembly is movable and shiftable, thereby prolonging a service life of the water spraying device, and also making it safer for the user by protecting the user against injury when the water spraying device is accidentally bumped.

There are different ways to reduce the connection stress. In example embodiments shown in <FIG>, the mounting assembly <NUM> is configured to include a mount <NUM> and a spherical connector, wherein the mount <NUM> constitutes a first end connected to the water inlet end <NUM> of the sprayer assembly, and has a mounting portion <NUM>, and the spherical connector constitutes a second end connected to the water inlet pipe, so that the mount <NUM> is adjustably connected to the water inlet pipe. Specifically, the spherical connector includes a ball head <NUM>, the ball head <NUM> has a spherical section <NUM> matching an arc-shaped connecting portion <NUM> on the mount <NUM> and a connecting section <NUM>, and the connecting section <NUM> is provided with an external thread connected to the water inlet pipe. When the ball head <NUM> is connected to the water inlet pipe, the spherical section <NUM> and the arc-shaped connecting portion <NUM> match each other to provide degrees of freedom of motion between the two, to further realize degrees of freedom of motion of the sprayer assembly connected to the mount <NUM>, so that the sprayer assembly can rotate within a certain range, which is conductive to adjusting a water outlet direction.

According to one or more example embodiments, the spherical connector further includes a nut <NUM> connected to the mount <NUM> and a pair of ball bushings <NUM>, <NUM> sandwiched therebetween. The mount <NUM> is provided with an external thread <NUM> matching an internal thread <NUM> disposed on the nut <NUM>, the arc-shaped connecting portion <NUM> matches an outer camber surface <NUM> of the ball bushing <NUM>, and the nut <NUM> is provided with an arc-shaped portion <NUM> that matches an outer camber surface <NUM> of the ball bushing <NUM>. In this way, when the ball head <NUM> is disposed between the pair of ball bushings <NUM>, <NUM>, the ball bushings <NUM>, <NUM> are disposed between the mount <NUM> and the nut <NUM>. When mount <NUM> and the nut <NUM> have been tightened by screwing, the spherical section <NUM> of the ball head <NUM> can be limited by an inner camber surface <NUM> of the ball bushing <NUM> and an inner camber surface <NUM> of the ball bushing <NUM>, and can move relative to the ball bushings <NUM>, <NUM>, that is, can do relative pivoting, and the connecting section <NUM> of the ball head <NUM> can extend out of the nut <NUM> to be further connected to the water inlet pipe. By means of the nut <NUM>, an operation of connecting the spherical connector and the mount may be convenient and quick, and an effect of screwing to fasten and unscrewing to move can be achieved. It should be understood that, in order to realize the movement of the sprayer assembly, an inner diameter of the nut <NUM> should be greater than an outer diameter of the water inlet pipe at its joint connected to the connecting section <NUM> of the ball head <NUM>. The connecting section <NUM> may be sleeved with a seal ring <NUM> to enhance a sealing performance between the ball head and the water inlet pipe.

According to the example arrangement described above, a connection stress between the mounting assembly and the sprayer assembly may be reduced. That is, if a fixed connection between the water inlet pipe and the ball head <NUM> is regarded as immovable, the nut <NUM> and the mount <NUM> that are fastened to each other and the sprayer assembly <NUM> that is connected to the mount <NUM> can be moved relative to the ball head <NUM>. Thus, the sprayer assembly <NUM> can be adjusted within a certain range, such as left and right, pitch, and other angles, which brings convenience to the user.

According to one or more example embodiments, the mount <NUM> is fastened to the water inlet end <NUM> of the sprayer assembly through the mounting portion <NUM> by means of, for example, snap joint, or screw connection.

According to one or more example embodiments, the mounting assembly <NUM> and the sprayer assembly <NUM> are detachably connected through magnetic elements. The magnetic elements include a first magnetic element <NUM> arranged at the water inlet end <NUM> of the sprayer assembly <NUM>, and a second magnetic element <NUM> arranged at the first end (i.e., the mount <NUM>) of the mounting assembly <NUM>. In this way, the sprayer assembly <NUM> is provided with the first magnetic element <NUM> in the shell, the mount <NUM> may be provided with a flange <NUM> extending radially outward, and the second magnetic element <NUM> is embedded in the flange <NUM>. The first magnetic element <NUM> and the second magnetic element <NUM> attract each other. For example, at least one of the first magnetic element <NUM> and the second magnetic element <NUM> is a permanent magnet, and the other one is a ferromagnetic component or is also a permanent magnet. Therefore, after the mounting assembly is fastened to the water inlet pipe, it is only necessary to align and approach the water inlet end <NUM> of the sprayer assembly and the mounting portion <NUM> of the mount <NUM>, then the water inlet end <NUM> of the sprayer assembly can be connected to the mounting portion <NUM> of the mount <NUM> under an attraction action of the magnetic elements, which not only brings convenience to disassembly and assembly, transportation and storage, but also ensures the connection or protects the safety of the user when the user accidentally bumps the sprayer assembly. This is because, when a collision force is small, the sprayer assembly and the mount may have a displacement to a certain extent but still maintain the connection under the magnetic attraction between the two, and the use of the water spraying device may not be affected. When the collision force is great enough to break the magnetic attraction between the two, the sprayer assembly falls by itself without hurting the user. In some cases, for example, when the user does not need a water spray function and removes the sprayer assembly, or when the sprayer assembly falls due to an impact, water from the water inlet pipe directly enters the pool, thereby avoiding interruption of water circulation, and thus providing more possibilities for the diversified use of the water spraying device.

<FIG> respectively show water flow directions with arrows. Specifically, water from the water inlet pipe flows from the water inlet end, at the joint between the sprayer assembly and the mount, into the cavity of the sprayer assembly through the ball head, flows upward and flows out of the nozzle at the outlet end of the sprayer assembly. It can also be seen from <FIG> that since the flange of the mount has a generally flat surface, when the sprayer assembly is connected to the mount, the surface of the flange fits a surface of the shell of the sprayer assembly to provide a certain degree of sealing, so that there is no need to dispose an additional seal between the sprayer assembly and the mount, and even if there is a small amount of water leakage, leaking water will flow into the pool without causing the loss of water. According to one or more example embodiments, in order to strengthen a sealing between the sprayer assembly and the mount and prevent water leakage from affecting a water spray pressure, an elastic sealing ring that is substantially annular may also be disposed on a contact surface between the mount and the sprayer assembly.

<FIG> illustrates a water spraying device of a second example embodiment, which differs from the above example embodiment in the mounting assembly. In this example embodiment, a mounting assembly <NUM> includes a mount <NUM>. One end of the mount <NUM> is a mounting portion <NUM> connected to the sprayer assembly, and the other end is constructed as an extension portion extending opposite the mounting portion <NUM>. The spherical connector in the above example embodiment is replaced with an extension portion to be connected to the water inlet pipe. The extension portion may be constructed in the form of a straight pipe <NUM>, and may have a certain length, such that when the sprayer assembly and the inner side of the pool wall of the pool are spaced apart by a certain distance, so that the pool may not directly squeeze the sprayer assembly after the pool is deformed, and the service life of the water spraying device is prolonged. The straight pipe <NUM> and the mount <NUM> can be integrally formed to simplify a manufacturing process and reduce the cost, or can be formed separately and then connected, for example, by threads. A tail end of the straight pipe is provided with an external thread <NUM> connected to the water inlet pipe, and is optionally sleeved with a seal ring <NUM> to be hermetically connected to the water inlet pipe.

Similarly, in this example embodiment, the mount <NUM> is provided with a flange <NUM> extending radially outward. With magnetic elements respectively disposed in the shell of the sprayer assembly and on the flange, a detachable magnetic connection between the sprayer assembly and the mounting assembly <NUM> can be achieved.

<FIG> and <FIG> illustrate a water spraying device of a third example embodiment. In this example embodiment, a sprayer assembly <NUM> is still mounted on an inner side of a pool wall via a mounting assembly <NUM> in a lower-end mounting manner. The differences lie in that the sprayer assembly <NUM> extends to a top side of the pool wall, and sprays water into the pool through a nozzle that can pivot as indicated by the arrows in <FIG>. Referring to <FIG> for details, a shell <NUM> of the sprayer assembly is bent and extends to be suitable for attachment to the top side of the pool wall of the above-ground pool, and is configured to include a first shell <NUM> and a second shell <NUM> attached to each other, at least one water delivery pipe in communication with the water inlet pipe <NUM> is disposed between the first shell <NUM> and the second shell <NUM>, for example, two water delivery pipes <NUM>, <NUM> shown in the figure. A nozzle <NUM> is in communication with the at least one water delivery pipe and is suitable to extend out of a notch disposed on the first shell or the second shell to be directed toward the inside of the pool body of the above-ground pool. That is, the nozzle is configured to be switchable between a first state in which the nozzle is accommodated in the notch and a second state in which the nozzle is directed toward the inside of the pool body. In the illustrated example embodiment, the nozzle <NUM> is pivotably connected to the first shell <NUM> and in communication with the water delivery pipes <NUM>, <NUM>, and the second shell <NUM> is provided with a notch <NUM> from which the nozzle <NUM> may extend outward. An outer surface of the nozzle <NUM> may be arranged to match the contour of an outer surface of the second shell <NUM> so that the outer surface of the nozzle can be pivoted to be flush with the outer surface of the second shell <NUM> when the nozzle is not used and in an accommodated state, as shown in <FIG>.

In this example embodiment, a light-emitting assembly <NUM> of the sprayer assembly can be arranged near a rear of the nozzle <NUM>, and a light-emitting element may be provided close to the rear of the nozzle, as shown in <FIG>. Moreover, a switch element <NUM> protruding from the shell <NUM> may be included, for facilitating user operation. The nozzle may include a component made of a transparent material. For example, the nozzle <NUM> may include a transparent rear plate. Light emitted by the light-emitting element may be injected into water inside the nozzle through the transparent rear plate and transmitted in the water such that the nozzle has a lighting effect when spraying water.

In this example embodiment, the mounting assembly can connect the sprayer assembly to the water inlet pipe according to any one of the above-described example embodiments. That is, the mounting assembly includes a first end (specifically, a mount <NUM>) that is fixedly or detachably connected to a water inlet end <NUM> of the sprayer assembly, and a second end that is fixedly connected to the water inlet pipe <NUM>. In order to improve the strength and safety in use of the water spraying device, the mounting assembly may further include a pulling component for connecting the water inlet pipe <NUM> to the sprayer assembly. The pulling component may be arranged in whole or in part on the outer side of the pool wall of the above-ground pool (<FIG> illustrates an example of a pulling component <NUM> arranged entirely on the outer side of the pool wall) to reduce a connection stress at a joint between the sprayer assembly and the mounting assembly. Specifically, referring to <FIG>, the pulling component <NUM> may be a pull fastener, with one end hooking the water inlet pipe <NUM>, and the other end connected to an outer side, extending to the top of the pool wall, of the sprayer assembly through a tensioning string or a tensioning belt (shown as the dotted lines). Thus, on the one hand, the pulling component can reduce the stress generated at the joint between the sprayer assembly and the mounting assembly due to deformation of the pool, thereby avoiding breakage, and on the other hand, it can also hold the sprayer assembly that falls when the joint is broken suddenly, thereby avoiding danger to the user from the broken parts.

It should be understood that the various example embodiments of a sprayer assembly and a mounting assembly described above may be combined in any combination to form water spraying devices in any of various different forms. No matter which example embodiment is used, a water spraying device may improve a safety of a user, while ensuring the pool's normal use, may have a simple structure, may be convenient to operate, may reduce production and maintenance costs of the water spraying device, and may be applicable to any of various above-ground pools.

It may be understood that the exemplary embodiments described herein may be considered in a descriptive sense only and not for purposes of limitation. Descriptions of features or aspects within each exemplary embodiment may be considered as available for other similar features or aspects in other exemplary embodiments.

Claim 1:
A water spraying device comprising:
a sprayer assembly (<NUM>, <NUM>) comprising a water inlet end (<NUM>, <NUM>) and a water outlet end (<NUM>, <NUM>); and
a mounting assembly (<NUM>, <NUM>, <NUM>) comprising a first end and a second end connectable to a water inlet pipe (<NUM>), wherein the first end and the second end of the mounting assembly (<NUM>, <NUM>, <NUM>) are in fluid communication to form a water passage to the sprayer assembly (<NUM>, <NUM>); characterised in that a first magnetic element (<NUM>) is disposed on the water inlet end (<NUM>,<NUM>), a second magnetic element (<NUM>) is disposed on the first end of the mounting assembly (<NUM>,<NUM>,<NUM>), and
wherein the first magnetic element (<NUM>) is mutually attractive to the second magnetic element (<NUM>) such that the water inlet end (<NUM>, <NUM>) of the sprayer assembly (<NUM>, <NUM>) and the first end of the mounting assembly (<NUM>, <NUM>, <NUM>) are detachably connectable via the first magnetic element (<NUM>) and the second magnetic element (<NUM>).