CN217183425U - Sound equipment - Google Patents

Abstract

The application provides an acoustic device, which comprises an inner shell, a main board, a microphone module and a sound generation module, wherein the inner shell is formed by buckling a first half shell and a second half shell; the mainboard is arranged on the inner side surface of the first half shell, and a Bluetooth module is arranged on the mainboard; the microphone module is arranged on the inner side surface of the second half shell and is electrically connected with the mainboard; the sounding module is arranged on the inner side surface of the inner shell and comprises a sounding part and a touch pad which are respectively and electrically connected with the mainboard, and the touch pad is used for adjusting volume and controlling a switch; a power supply interface, a signal input interface and a microphone interface are arranged on the first side surface of the inner shell, the power supply interface and the signal input interface are respectively and electrically connected with the mainboard, and the microphone interface is electrically connected with the microphone module; the pronunciation face of pronunciation module with the touchpad all faces the second side of inner shell. The problem of current stereo set function singleness has been solved in this application.

Description

Sound equipment

Technical Field

The application relates to the field of sound equipment, in particular to a sound device.

Background

With the continuous improvement of living standard of people, the household sound has entered the life of people and becomes a necessary product of household appliances of people. In the prior art, various sound products exist, however, the existing sound equipment is usually used together with equipment such as DVD, CD, microphone and the like, only music can be simply played, and the function is single.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a sound device, has solved the problem of current stereo set function singleness.

The utility model discloses a sound device, which comprises an inner shell, a mainboard, a microphone module and a sound generation module, wherein the inner shell is formed by buckling a first half shell and a second half shell; the mainboard is arranged on the inner side surface of the first half shell, and a Bluetooth module is arranged on the mainboard; the microphone module is arranged on the inner side surface of the second half shell and is electrically connected with the mainboard; the sounding module is arranged on the inner side surface of the inner shell and comprises a sounding piece and a touch pad, the sounding piece and the touch pad are respectively and electrically connected with the mainboard, and the touch pad is used for adjusting volume and controlling a switch; a power supply interface, a signal input interface and a microphone interface are arranged on the first side surface of the inner shell, the power supply interface and the signal input interface are respectively and electrically connected with the mainboard, and the microphone interface is electrically connected with the microphone module; the pronunciation face of pronunciation module with the touchpad all faces the second side of inner shell.

According to the sound equipment that this application embodiment provided, except that set up microphone module and sound production piece and realize recording and broadcast function, still be provided with the bluetooth module, power source, signal input interface and touch pad, so that sound equipment can be with data conversion function, the function of charging, bluetooth transmission function, touch control switch and volume, broadcast function and microphone are integrated as an organic whole, sound equipment's function has been richened, make sound equipment can satisfy the user demand of user in different scenes.

In one embodiment, the touch pad is electrically connected to the main board through a flexible circuit board.

In one embodiment, the audio device further comprises a fixing plate disposed on the second side of the inner casing and connected to the first and second half shells, respectively;

the fixed plate is provided with a sounding hole and a touch hole opposite to the touch pad.

In one embodiment, the sound device further comprises an outer shell, and the outer shell is sleeved on the periphery of the inner shell;

the first end face of the shell is provided with a face cover, and the face cover is provided with interface holes respectively opposite to the power supply interface, the signal input interface and the microphone interface;

and a touch cover is arranged on the second end face of the shell and is used for a user to touch the touch pad to switch on and off the sound device and adjust the volume.

In one embodiment, interface symbol marks are printed on the face cover at positions around the interface hole;

the touch cover is printed with a switch mark, a volume increase mark and a volume decrease mark.

In one embodiment, a light guide column is arranged on the touch cover, an LED lamp included in the light guide column is electrically connected with the touch pad, and the light guide column is used for indicating the power-on state of the sound device.

In one embodiment, the touch cover is made of woven cloth;

the shell is made of wood materials.

In one embodiment, four silica gel cushion blocks arranged in a square shape are arranged on the outer side surface of the shell.

In one embodiment, the audio device further comprises a support base, and the housing is disposed on the support base.

In one embodiment, the bottom surface of the supporting seat is provided with a non-slip mat.

The application provides a sound equipment's beneficial effect lies in: compared with the prior art, microphone module, sound production piece, bluetooth module, power source, signal input interface and touch pad setting are in the same place in this application to make audio equipment can possess the data conversion function simultaneously, the function of charging, bluetooth transmission function, touch control switch and volume, broadcast function and microphone function, very big richened audio equipment's function, make audio equipment can satisfy the user demand of user in more different scenes.

Drawings

Fig. 1 is an exploded view of an acoustic apparatus according to an embodiment of the present application;

fig. 2 is a schematic overall structure diagram of an acoustic apparatus according to an embodiment of the present application;

fig. 3 is a front view of an audio apparatus according to an embodiment of the present application;

fig. 4 is a rear view of an audio apparatus according to an embodiment of the present application;

fig. 5 is a state diagram of the audio apparatus according to the embodiment of the present application in a landscape state.

Reference numerals: 10. an inner shell; 11. a first half shell; 12. a second half shell;

20. a main board; 21. a flexible circuit board;

30. a Bluetooth module;

40. a microphone module;

50. a pronunciation module; 51. a sound producing member; 52. a touch panel;

60. a fixing plate; 61. a sound emitting hole; 62. a touch hole;

70. a housing; 71. a face cover; 710. an interface aperture; 72. a touch cover; 721. marking a switch; 722. a volume increase indication; 723. a volume reduction indication; 73. a silica gel cushion block;

80. a light guide pillar;

90. a supporting seat; 91. a non-slip mat.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

It should be noted that the same reference numerals are used to denote the same components or parts in the embodiments of the present application, and for the same parts in the embodiments of the present application, only one of the parts or parts may be given the reference numeral, and it should be understood that the reference numerals are also applicable to the other same parts or parts.

The embodiment of the application provides a sound device, has solved the problem of current stereo set function singleness.

Fig. 1 shows an exploded view of an audio device according to a preferred embodiment of the present invention, and for convenience of description, only the parts related to the embodiment are shown, which are detailed as follows:

referring to fig. 1, the acoustic device according to the embodiment of the present disclosure includes an inner housing 10, a main board 20, a microphone module 40, and a sound module 50, wherein the inner housing 10 is formed by fastening a first half housing 11 and a second half housing 12; the mainboard 20 is arranged on the inner side surface of the first half shell 11, and the Bluetooth module 30 is arranged on the mainboard 20; the microphone module 40 is arranged on the inner side surface of the second half shell 12, and the microphone module 40 is electrically connected with the mainboard 20; the sounding module 50 is arranged on the inner side surface of the inner shell 10, the sounding module 50 comprises a sounding part 51 and a touch pad 52, the sounding part 51 and the touch pad 52 are respectively electrically connected with the main board 20, and the touch pad 52 is used for adjusting volume and controlling a switch; a power supply interface, a signal input interface and a microphone interface are arranged on the first side surface of the inner shell 10, the power supply interface and the signal input interface are respectively and electrically connected with the main board 20, and the microphone interface is electrically connected with the microphone module 40; the sound emitting surface of the sound emitting module 50 and the touch pad 52 face the second side of the inner case 10.

Specifically, the inner shell 10 of the embodiment of the present application is formed by buckling a first half shell 11 and a second half shell 12, a main board 20 is arranged on the inner side surface of the first half shell 11, a microphone module 40 is arranged on the inner side surface of the second half shell 12, and a sound generation module 50 is arranged on the inner side surface of the first half shell 11 or the inner side surface of the second half shell 12, so that the main board 20, the microphone module 40 and the sound generation module 50 can be separately installed, and then the first half shell 11 and the second half shell 12 are buckled together to realize the assembly of the sound device, so that the assembly efficiency of the sound device is greatly improved; at the same time, the first half-shell 11 and the second half-shell 12 can be detached, so that the inner shell 10 can be quickly opened for inspection and maintenance in the event of a failure of the audio device. Wherein, pass through the screw fixation with mainboard 20 on first half 11 medial surfaces, pass through the screw fixation with microphone module 40 on half 12 medial surfaces of second, also pass through the screw fixation with pronunciation module 50 on half 11 medial surfaces of first half or half 12 medial surfaces of second, can make mainboard 20, microphone module 40 and pronunciation module 50 more firm in the inside installation of audio equipment like this, can not take place to shift because of audio equipment's removal or upset and lead to performance bad.

It should be noted that, the touch pad 52 provided in the embodiment of the present application can enable a user to control the audio device to be turned on and off by touching, and adjust the volume of the sound emitted by the audio device by touching.

Specifically, the power source that sets up on the first side of inner shell 10 in this application embodiment can be Micro USB interface or USBType C interface or Lightning interface, nevertheless because Micro USB interface or USBType C interface are comparatively commonly used, so can set up Micro USB interface and/or USBType C interface as power source to it is more convenient to make the user charge, need not carry dedicated charging wire and power adapter.

The signal input interface provided on the first side of the inner case 10 in the embodiment of the present application may include an HDMI interface and a USB interface. HDMI (high Definition Multimedia interface), namely a high-Definition Multimedia interface, is a full-digital image/sound transmission interface, and can transmit uncompressed audio signals and video signals, HDMI provides a common data connection pipeline for all compatible devices (such as DVD players, personal computers, video game machines, comprehensive amplifiers, digital audio and televisions), HDMI can transmit audio and video signals at the same time, and the audio and video signals adopt the same cable, so that the installation of the system is greatly simplified. USB is an external bus standard that standardizes the connection and communication between computers and external devices. The USB interface has hot plug function, and can be connected with various peripheral equipment, such as a mouse, a keyboard and the like. The signal types received by the sound device can be richer by arranging different types of signal input interfaces, conversion among different data signals can be realized, and more use requirements of users are met.

It can be understood that various interfaces are arranged on the first side face of the sound device, the touch pad 52 and the sound-emitting face the second side face of the sound device, so that the second side face of the sound device can face a user when the sound device is used by the user, the user can conveniently turn on and off the sound device and adjust the volume according to requirements, the first side face of the sound device faces away from the user, if the sound device is placed on a desktop, the first side face of the sound device faces away from the user, so that the circuit connected with the interfaces does not occupy the desktop space, and the office desktop environment of the user is not cluttered.

In the acoustic device provided by the embodiment of the present application, the microphone module 40 and the microphone interface are arranged to insert a microphone into the microphone interface to electrically connect the microphone with the microphone module 40, so as to realize a recording function, the sound generation module 50 is arranged to play sound, wherein the sounding part can be a speaker, besides the microphone module 40 and the sounding part 51, the bluetooth module 30, a power interface, a signal input interface and a touch pad 52 are also provided, the bluetooth module 30 can enable a user to control audio frequency through bluetooth signals, the power interface can be a common charging interface, so as to rapidly charge the sound equipment, the signal input interface can connect the sound equipment with external equipment to transmit data, the main board 20 can perform a data conversion function, and the touch pad 52 is configured to enable a user to control the on/off of the audio device and adjust the volume by touching. Synthesize the above-mentioned, sound can be integrated as an organic whole with data conversion function, charging function, bluetooth transmission function, touch control switch and volume, broadcast function and microphone, has richened sound's function for sound can satisfy the user demand of user in different scenes, is fit for using in house and small-size office environment. The sound device of the embodiment of the application includes, but is not limited to, realizing the above functions, and under some special use environments or use requirements, a new component module can be added to the sound device to realize a new function.

In one embodiment, referring to fig. 1, the touch pad 52 is electrically connected to the main board 20 through the flexible circuit board 21.

It should be noted that the Flexible Printed Circuit board 21 (FPC) is a Flexible Printed Circuit board with high reliability and excellent performance, which is made of a polyimide or polyester film as a base material. The high-density light-weight LED lamp has the characteristics of high wiring density, light weight, thin thickness and good bending property. The embodiment of the application can be free from the position limitation of the touch pad 52 and the main board 20 by connecting the touch pad 52 and the main board 20 through the flexible circuit board 21, and moreover, the flexible circuit board 21 can be bent, so that the occupied space can be reduced to a certain extent, the sound device is more compact in layout of all parts, and the whole volume of the sound device is reduced.

In one embodiment, referring to fig. 1, the acoustic device further includes a fixing plate 60, the fixing plate 60 being disposed on the second side surface of the inner casing 10 and connected to the first and second casing halves 11 and 12, respectively; the fixing plate 60 is provided with a sound emitting hole 61 and a touch hole 62 facing the touch pad 52.

Specifically, because the main board 20, the microphone module 40 and the sound generating module in the embodiment of the present application are all disposed on the inner side surface of the inner shell 10, the first half shell 11 and the second half shell 12 are only buckled together and easily receive the main board 20, the microphone module 40 and the sound generating module are under the weight pressure to cause the scattering, and the connection is not firm, the embodiment of the present application sets the fixing plate 60 to be connected with the first half shell 11 and the second half shell 12 respectively, so that the connection between the first half shell 11 and the second half shell 12 becomes firm, at this time, the first half shell 11 and the second half shell 12 can be well connected together to form the inner shell 10 without setting the buckling structure, on one hand, the manufacturing steps of the first half shell 11 and the second half shell 12 can be simplified, on the other hand, the first half shell 11 and the second half shell 12 can be conveniently disassembled and installed, the assembly and disassembly efficiency of the inner shell 10 is improved; the fixing plate 60 is provided on the second side of the inner case 10 to seal the inside of the inner case 10, and the fixing plate 60 may be made of the same material as the inner case 10 in order to make the outer appearance of the inner case 10 more beautiful. Wherein the fixing plate 60 may be fixed on the second side of the inner case 10 using screws.

In one embodiment, referring to fig. 1-2, the audio device further includes an outer casing 70, wherein the outer casing 70 is sleeved on the outer periphery of the inner casing 10; a face cover 71 is arranged on the first end face of the shell 70, and interface holes 710 which are respectively opposite to the power supply interface, the signal input interface and the microphone interface are arranged on the face cover 71; the second end of the housing 70 is provided with a touch cover 72, and the touch cover 72 is used for the user to touch the touch pad 52 to turn on and off the audio device and adjust the volume.

Specifically, in the embodiment of the present application, the outer shell 70 is sleeved on the outer periphery of the inner shell 10, so that not only the whole acoustic device can be reinforced to prevent the acoustic device from being damaged by external force collision, but also the outer shell 70 can be used for decorating and beautifying the appearance of the acoustic device. The face cover 71 is provided on the first end face of the housing 70, and the touch cover 72 is provided on the second end face of the housing 70, so that the appearance of the audio device can be decorated and beautified in all directions.

It should be noted that the face cover 71 disposed on the first end face of the housing 70 may be fixed to the first end face of the housing 70 by screws, or may be adhered to the first end face of the housing 70 by a back adhesive, if the screws are used for fixing, the face cover 71 is convenient to detach, if the back adhesive is used for adhering, the appearance of the audio device may be more beautiful, and specifically, the face cover may be selected according to actual needs, which is not limited in this embodiment. A touch cover 72 provided on the second end face of the housing 70 is attached to the second end face of the housing 70 by a back adhesive.

In one embodiment, referring to fig. 3-4, interface symbol labels are printed on the face cover 71 at locations around the interface aperture 710; the touch cover 72 has a switch designation 721, a volume-up designation 722, and a volume-down designation 723 printed thereon.

It should be noted that, the interface symbol marks are printed on the face cover 71, which is convenient for the user to check what the interface corresponding to each interface hole 710 is, so that the user can quickly and conveniently connect the external device to the interface of the audio apparatus. After the touch cover 72 is disposed on the second end of the housing 70, although the appearance of the audio device may be beautified, the touch cover 72 may shield the touch pad 52, and a user may not easily find a touched position accurately, so that the switch identifier 721, the volume increase identifier 722, and the volume decrease identifier 723 printed on the touch cover 72 may be convenient for the user to find the touched position accurately, and the use is more convenient. It should be noted that, since the user can control the on/off of the audio device and the adjustment of the volume level by touching the switch indicator 721, the volume-up indicator 722 and the volume-down indicator 723, the touch cover 72 needs to be in contact with the touch pad 52, so as to implement the touch control function.

In one embodiment, referring to fig. 1 and 4, the light guide bar 80 is disposed on the touch cover 72, the LED lamp included in the light guide bar 80 is electrically connected to the touch pad 52, and the light guide bar 80 is used for indicating the power-on state of the audio device.

It should be noted that, in the embodiment of the present application, the light guide pillar 80 is disposed on the touch cover 72, the power-on state of the audio device can be indicated through the light guide pillar 80, when the user touches the switch mark 721, if the audio device is powered on and turned on, the light guide pillar 80 will light up, and the audio device is kept in a normally-on state during use, when the user touches the switch mark 721 again, if the audio device is powered off and turned off, the light guide pillar 80 will be turned off, and the user can know whether the audio device is successfully turned on or turned off by observing the light-off condition of the light guide pillar 80, thereby avoiding the situation that the user does not successfully turn off the audio device and wastes electric energy.

Specifically, light guide column 80 can inlay and establish on touch lid 72, and light guide column 80 passes fixed plate 60 and passes through the gum adhesion on pronunciation module 50, so can be fixed more firm with light guide column 80, and make things convenient for the LED lamp that light guide column 80 includes to be connected with touch pad 52 electricity, the circuit that the LED lamp that light guide column 80 includes and touch pad 52 electricity are connected can be hidden in the inside of inner shell 10, can not influence sound equipment's outward appearance, and the security that the LED lamp that light guide column 80 includes and touch pad 52 electricity are connected has also been guaranteed more.

In one embodiment, optionally, the touch cover 72 is made of woven cloth; the housing 70 is made of a wooden material.

It should be noted that the touch cover 72 in the embodiment of the present application may be made of woven cloth, so that the sound production of the sound production module is not affected, and the characteristics of the woven cloth wrapping cloth have a strong stereoscopic impression, so that the sound device can be well decorated, and the touch effect when the user touches the switch indicator 721, the volume increase indicator 722, and the volume decrease indicator 723 is also better. The shell 70 is made of the wood material, so that the effect of decorating and beautifying the sound device can be achieved, and the shell 70 can be made of walnut, so that the sound device is natural and energetic.

In one embodiment, referring to fig. 2, four silicone pads 73 are provided on the outer side of the housing 70 in a square arrangement.

It should be noted that the acoustic device of the present application may be vertically placed as shown in fig. 2, or may be horizontally placed on a desktop, as shown in fig. 5, at this time, a side surface of the housing 70 contacts with the desktop, in order to prevent the acoustic device from shifting due to the sliding of the housing 70 on the desktop, a silicone pad 73 may be disposed on an outer side surface of the housing 70, the silicone pad 73 may play a role of skid resistance, in order to stabilize the placement of the acoustic device on the desktop, four silicone pads 73 arranged in a square shape may be disposed, or three silicone pads 73 arranged in a triangle shape may be disposed, where the number of the silicone pads 73 is not limited, as long as the acoustic device can be stably placed on the desktop, based on this requirement, a silicone sheet may be disposed on the outer side surface of the housing 70 to cover the entire outer side surface of the housing 70, but the usage amount of the silicone sheet may be increased, increasing the cost and also destroying the decorativeness of the housing 70.

Specifically, the silica gel pad 73 in the embodiment of the present application is directly attached to the outer side surface of the housing 70 by using a back adhesive, which is convenient for attachment.

In one embodiment, referring to fig. 1-4, the audio device further includes a support 90, and the housing 70 is disposed on the support 90.

It should be noted that placing the audio device on the support 90 can make the audio device more stable to be placed, because the bottom surface area of the support 90 is larger than that of the audio device, and the overall appearance of the audio device can be more beautiful due to the arrangement of the support 90. Wherein, audio device can dismantle the setting on supporting seat 90, also can directly place on supporting seat 90, and this application embodiment does not do the restriction. The side of the support 90 that contacts the audio device can be designed to match the shape of the bottom of the audio device, so that the audio device can be placed on the support 90 more stably and appropriately, and the audio device is not prone to falling off from the support 90.

Specifically, since the support 90 is used for supporting the audio device, the support 90 needs to have a certain rigidity, and can be made of plastic or metal.

In one embodiment, referring to fig. 1-4, a non-slip pad 91 is provided on the bottom surface of the support base 90.

It should be noted that the bottom surface of the supporting seat 90 may be provided with a non-slip pad 91, which can effectively prevent the supporting seat 90 from shifting due to sliding when placed on the ground or a table top. Wherein, the slipmat 91 can be the silica gel material, with slipmat 91 directly adopt the gum paste on the supporting seat 90 bottom surface can, conveniently paste dress.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (10)

1. An audio device, comprising:

the inner shell (10), the said inner shell (10) is buckled by the first half-shell (11) and second half-shell (12);

the main board (20), the main board (20) is arranged on the inner side surface of the first half shell (11), and a Bluetooth module (30) is arranged on the main board (20);

the microphone module (40), the microphone module (40) is arranged on the inner side surface of the second half shell (12), and the microphone module (40) is electrically connected with the mainboard (20);

the sounding module (50) is arranged on the inner side face of the inner shell (10), the sounding module (50) comprises a sounding piece (51) and a touch pad (52), the sounding piece (51) and the touch pad (52) are electrically connected with the mainboard (20) respectively, and the touch pad (52) is used for adjusting volume and controlling a switch;

a power supply interface, a signal input interface and a microphone interface are arranged on the first side surface of the inner shell (10), the power supply interface and the signal input interface are respectively and electrically connected with the main board (20), and the microphone interface is electrically connected with the microphone module (40);

the sound-making surface of the sound-making module (50) and the touch pad (52) face the second side surface of the inner shell (10).

2. Acoustic device according to claim 1, characterised in that the touch pad (52) is electrically connected to the main board (20) by means of a flexible circuit board (21).

3. Acoustic device according to claim 1 or 2, further comprising a fixing plate (60), said fixing plate (60) being arranged on a second side of said inner shell (10) and being connected to said first half-shell (11) and to said second half-shell (12), respectively;

the fixed plate (60) is provided with a sound hole (61) and a touch hole (62) opposite to the touch pad (52).

4. The audio device as claimed in claim 3, further comprising an outer shell (70), wherein the outer shell (70) is sleeved on the periphery of the inner shell (10);

a face cover (71) is arranged on the first end face of the shell (70), and interface holes (710) which are respectively opposite to the power supply interface, the signal input interface and the microphone interface are formed in the face cover (71);

the second end face of the shell (70) is provided with a touch cover (72), and the touch cover (72) is used for enabling a user to touch the touch pad (52) to switch on and off the sound device and adjust the volume.

5. Acoustic apparatus according to claim 4, characterised in that the cover (71) has interface symbol indications printed on it at positions surrounding the interface aperture (710);

the touch cover (72) is printed with a switch mark (721), a volume increase mark (722) and a volume decrease mark (723).

6. The audio device according to claim 5, wherein a light guide pillar (80) is disposed on the touch cover (72), the light guide pillar (80) includes an LED lamp electrically connected to the touch pad (52), and the light guide pillar (80) is used for indicating a power-on state of the audio device.

7. Acoustic device according to any one of claims 4 to 6, characterised in that the touch cover (72) is made of woven cloth;

the shell (70) is made of wood materials.

8. Acoustic device according to claim 7, characterised in that the outer side of the casing (70) is provided with four silicone pads (73) arranged in a square.

9. An acoustic device according to claim 7, further comprising a support base (90), the housing (70) being provided on the support base (90).

10. Audio device according to claim 9, characterized in that the bottom surface of the support (90) is provided with a non-slip pad (91).

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