Portable sound equipment with adjustable sound cavity volume

Abstract

The application provides a portable sound equipment with adjustable sound cavity volume, and relates to the technical field of portable sound equipment. The portable sound equipment comprises a sound equipment shell member, a self-cleaning mechanism is mounted on one side of the inside of the sound equipment shell member, and a sound cavity adjusting mechanism is mounted on the other side of the inside of the sound equipment shell member. The sound cavity adjusting mechanism comprises a sound outlet module and an extension labyrinth plate. The sound cavity adjusting mechanism can also adjust the sound outlet module during the adjustment of the sound cavity. Through the above technical scheme, the sound cavity volume in the equipment shell and the extension sound box can be adjusted by the sound cavity adjusting mechanism, so that the sound equipment can play undamaged sound quality in different environments, and the areas of the two extension labyrinth plates can be driven and adjusted to realize effective rebound of sound energy radiation, improve the sound quality of sound equipment playing, and the sound outlet module is adjusted in angle, so that sound energy is fully conducted to the sound cavity and the extension labyrinth plate, and the practicability of the sound equipment is improved.

Description

Technical Field

[0001] This invention relates to the field of portable audio technology, and more particularly to a portable audio system with an adjustable acoustic cavity volume. Background Technology

[0002] A speaker is a device that can convert audio signals into sound. However, in the actual application of audio equipment, the speaker is the terminal of the entire audio system. Its function is to convert audio electrical energy into corresponding sound energy and radiate it into space.

[0003] Currently, the sound cavity of existing speakers is affected by its volume and environment. When a larger volume is needed to play louder sounds, the sound quality will be better. As a result, the sound playback of the speaker is limited by the sound cavity when facing different environments, resulting in poor sound quality. In addition, when the speaker is used for a long time, dust will adhere to the surface of the sound output module, which will affect the playback quality of the speaker when playing music. Therefore, this invention proposes a portable speaker with an adjustable sound cavity volume. Summary of the Invention

[0004] The purpose of this invention is to solve the problems of existing technologies, such as dust adhering to the surface of the sound output module, requiring regular maintenance and increasing manual labor, and the sound quality of the audio system being limited by the sound cavity when facing different environments.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a portable speaker with adjustable acoustic cavity volume, comprising a speaker housing component, wherein a self-cleaning mechanism is installed on one side of the speaker housing component, and an acoustic cavity adjustment mechanism is installed on the other side of the speaker housing component. The acoustic cavity adjustment mechanism includes a sound output module and an extension labyrinth plate. During the acoustic cavity adjustment process, the acoustic cavity adjustment mechanism can also adjust the sound output module, and simultaneously, the acoustic cavity adjustment mechanism can also extend and adjust the extension labyrinth plate. The speaker housing component includes a speaker housing, wherein an amplification outer plate is installed on one side of the speaker housing, and a bass reflex port is also installed on one side of the speaker housing. The bass reflex port is located below the amplification outer plate, and a support base is fixedly connected to the lower surface of the speaker housing. The acoustic cavity adjustment mechanism includes an extension speaker, which is telescopically installed on the rear side of the upper surface of the speaker housing. A fixing plate is fixedly connected to the upper surface of the extension speaker, and a pull ring is rotatably installed on the upper surface of the fixing plate. An upper slide rail is fixedly connected to the inner wall of the extension speaker.

[0006] In at least some embodiments, a control panel is provided on the upper surface of the speaker housing, an H-shaped mounting plate is fixedly connected to the middle of the inner wall of the speaker housing, sound insulation cotton is provided on both sides near the outer panel of the speaker housing, the sound insulation cotton is fixedly connected to the inner wall of the speaker housing, a circuit back plate is fixedly connected to the other side surface of the speaker housing, a power source is electrically connected to one side surface of the circuit back plate, and the power source is located inside the rear of the speaker housing.

[0007] In at least some embodiments, an electric push rod is fixedly connected to one side surface of the power supply, and a connecting guide block is fixedly connected to the output shaft of the electric push rod. The connecting guide block is L-shaped, with one end of the connecting guide block electrically connected to the power supply and the other end of the connecting guide block electrically connected to the sound output module. Protrusions are fixedly connected to both sides of the inner wall of the speaker housing.

[0008] In at least some embodiments, a motor mount is installed on the upper slide rail, a second motor is fixedly connected to the lower surface of the motor mount, a drive screw is fixedly connected to the output shaft of the second motor, a mating rod is engaged with the drive screw, a central block is fixedly connected to the lower end of the mating rod, and C-shaped mounting plates are rotatably mounted on both sides of the central block.

[0009] In at least some embodiments, transmission side plates are rotatably mounted at both ends of the C-shaped mounting plate, a side-mounted sheet metal is rotatably mounted at the lower end of each transmission side plate, a central shaft is fixedly connected to the lower ends of the two side-mounted sheet metals, an assembly plate is fixedly connected between the two side-mounted sheet metals, a sound output module is installed in the assembly plate, and a central shaft is fixedly connected to the outer side of the lower end of each side-mounted sheet metal.

[0010] In at least some embodiments, the central shaft is rotatably mounted above the H-shaped mounting plate, the upper end of the mating rod is fixedly fitted with a mounting sleeve, one side of the mounting sleeve is fixedly connected to a mounting slide rail, and two extended labyrinth plates are mounted on one side of the mounting slide rail.

[0011] In at least some embodiments, push rods are rotatably mounted on the inner side of the same end of both extended maze plates, and C-shaped connectors are rotatably mounted on the other end of the two push rods. A side rail is mounted on one side of the C-shaped connector and is fixedly connected to one side of the inner wall of the extended speaker.

[0012] In at least some embodiments, the self-cleaning mechanism includes a slip ring, with side connecting plates fixedly connected to both sides of the slip ring. The slip ring is fixedly connected to one side surface of an H-shaped mounting plate via the side connecting plates. An arc-shaped slider is installed on one side inside the slip ring, and a rotating shaft is rotatably installed in the middle of one side of the arc-shaped slider. A gear ring is fixedly connected to the outer edge of the slip ring.

[0013] In at least some embodiments, a driven gear is fixedly sleeved on the upper end of the rotating shaft, the driven gear meshing with a gear ring, a cleaning brush is fixedly connected to the lower end of the rotating shaft, and a mating gear is also sleeved on the cleaning brush. There are two mating gears, and another mating gear is fixedly sleeved on the output shaft of motor number one. Motor number one is fixedly connected to the lower surface of the arc-shaped slider.

[0014] Compared with the prior art, the advantages and positive effects of the present invention are as follows:

[0015] 1. In this invention, the acoustic cavity adjustment mechanism can not only adjust the volume of the acoustic cavity in the outer shell and the extended speaker, so that the speaker can play lossless sound quality in different environments, but also drive and adjust the area of ​​the two extended labyrinth plates to achieve effective rebound of sound energy radiation, improve the sound quality of the speaker playback, and adjust the angle of the sound output module, so as to achieve full conduction of sound energy to the acoustic cavity and the extended labyrinth plates, thereby improving the practicality of the speaker.

[0016] 2. In this invention, the connecting guide block is driven to move horizontally by an electric push rod. The connecting guide block can connect the power supply and the sound output module. On the one hand, it can provide power to the sound output module to realize the conversion of electrical energy into sound energy. On the other hand, in the event of a short circuit or overload in the speaker, the power supply can be cut off in time, thereby improving the safety of the speaker. Furthermore, the self-cleaning mechanism can clean the dust on the surface of the sound output module, thereby extending the service life of the speaker and facilitating subsequent daily maintenance of the speaker. Attached Figure Description

[0017] Figure 1 A schematic perspective view of the cavity extension structure of a portable speaker with adjustable cavity volume is provided for this invention.

[0018] Figure 2 A schematic perspective view of the cavity retraction structure of a portable speaker with adjustable cavity volume proposed in this invention;

[0019] Figure 3 This invention provides a schematic perspective view of one side of the cross-sectional structure of a portable speaker with adjustable acoustic cavity volume.

[0020] Figure 4 This invention provides a schematic perspective view of the other side of the cross-sectional structure of a portable speaker with adjustable acoustic cavity volume.

[0021] Figure 5 This invention provides a schematic perspective view of the overall structure of the speaker housing component for a portable speaker with adjustable acoustic cavity volume.

[0022] Figure 6 A schematic perspective view of the combined structure of an H-shaped mounting plate and a self-cleaning mechanism for a portable speaker with adjustable acoustic cavity volume proposed in this invention.

[0023] Figure 7 A three-dimensional schematic diagram of the overall structure of a self-cleaning mechanism for a portable speaker with adjustable acoustic cavity volume is provided for this invention.

[0024] Figure 8 A three-dimensional cross-sectional view of the extended speaker structure of a portable speaker with adjustable acoustic cavity volume is provided for this invention.

[0025] Figure 9 This invention provides a schematic perspective view of a portion of the acoustic cavity adjustment mechanism of a portable speaker with adjustable acoustic cavity volume.

[0026] Figure 10 This invention presents a schematic perspective view of another part of the acoustic cavity adjustment mechanism of a portable speaker with adjustable acoustic cavity volume.

[0027] Legend: 100, Speaker housing component; 200, Self-cleaning mechanism; 300, Sound cavity adjustment mechanism; 101, Speaker housing; 102, Control panel; 103, Amplifier outer panel; 104, Sound insulation cotton; 105, Bass reflex port; 106, Support base; 107, H-shaped mounting plate; 108, Power supply; 109, Electric push rod; 110, Connecting guide block; 111, Protrusion block; 112, Circuit back plate; 201, Slip ring; 202, Gear ring; 203, Side connecting plate; 204, Arc-shaped slider; 205, Rotating shaft; 206, Driven gear; 207, Meshing gear. ; 208. Motor No. 1; 209. Cleaning brush; 301. Extended speaker; 302. Fixing plate; 303. Pull ring; 304. Motor No. 2; 305. Motor mount; 306. Upper slide rail; 307. Drive screw; 308. Matching rod; 309. Mounting sleeve; 310. Assembly plate; 311. Sound output module; 312. Central shaft; 313. C-shaped mounting plate; 314. Center block; 315. Transmission side plate; 316. Extended labyrinth plate; 317. Mounting slide rail; 318. Push rod; 319. Side slide rail; 320. C-shaped connecting seat; 321. Side mounting sheet metal. Detailed Implementation

[0028] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0029] Numerous specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways than those described herein, and therefore the invention is not limited to the specific embodiments disclosed in the following specification.

[0030] Implementation examples, based on Figures 1-10,like Figures 1-4 As shown, an embodiment of the present invention provides a portable speaker with adjustable acoustic cavity volume, including a speaker housing component 100. A self-cleaning mechanism 200 is installed on one side of the speaker housing component 100, and an acoustic cavity adjustment mechanism 300 is installed on the other side of the speaker housing component 100. The acoustic cavity adjustment mechanism 300 includes a sound output module 311 and an extension labyrinth plate 316. During the acoustic cavity adjustment process, the acoustic cavity adjustment mechanism 300 can also adjust the sound output module 311, and simultaneously, the acoustic cavity adjustment mechanism 300 can also extend and adjust the extension labyrinth plate 316. Figure 5 As shown, the speaker housing component 100 includes a speaker housing 101. A speaker amplifier panel 103 is mounted on one side of the speaker housing 101, and a bass reflex port 105 is also mounted on one side of the speaker housing 101. The bass reflex port 105 is located below the speaker amplifier panel 103. A support base 106 is fixedly connected to the lower surface of the speaker housing 101. Figure 8 As shown, the acoustic cavity adjustment mechanism 300 includes an extended speaker 301, which is telescopically mounted on the rear side of the upper surface of the speaker housing 101. A fixing plate 302 is fixedly connected to the upper surface of the extended speaker 301, and a pull ring 303 is rotatably mounted on the upper surface of the fixing plate 302. An upper slide rail 306 is fixedly connected to the inner wall of the extended speaker 301. Pulling the pull ring 303 can extend the extended speaker 301 upwards from the speaker housing 101.

[0031] like Figure 5As shown, a control panel 102 is provided on the upper surface of the speaker housing 101. An H-shaped mounting plate 107 is fixedly connected to the middle of the inner wall of the speaker housing 101. Sound insulation cotton 104 is provided on both sides near the outer sound amplification plate 103. The sound insulation cotton 104 is fixedly connected to the inner wall of the speaker housing 101. A circuit back plate 112 is fixedly connected to the other side surface of the speaker housing 101. A power supply 108 is electrically connected to one side surface of the circuit back plate 112. The power supply 108 is located inside and behind the speaker housing 101. An electric push rod 109 is fixedly connected to one side surface of the power supply 108. A connecting guide block 110 is fixedly connected to the output shaft of the electric push rod 109. The connecting guide block 110 is L-shaped. One end of the connecting block 110 is electrically connected to the power supply 108, and the other end of the connecting block 110 is electrically connected to the sound output module 311. When the sound output module 311 plays music, the sound effect can be amplified through the sound insulation cotton 104 and the amplification outer plate 103, making the played sound louder. The inner walls of the speaker housing 101 are fixedly connected to the two sides of the protruding blocks 111. The electric push rod 109 pushes the connecting block 110 to move horizontally. When one end of the connecting block 110 is connected to the power supply 108 and the other end is connected to the sound output module 311, the power supply can provide power to the sound output module 311. Conversely, it can quickly supply and cut off power to the sound output module 311. In case of speaker overload, the power supply can be cut off in time, improving the safety of the speaker.

[0032] like Figures 8-9 As shown, a motor mount 305 is mounted on the upper slide rail 306. A second motor 304 is fixedly connected to the lower surface of the motor mount 305. A drive screw 307 is fixedly connected to the output shaft of the second motor 304. A mating rod 308 is engaged with the drive screw 307. A center block 314 is fixedly connected to the lower end of the mating rod 308. The second motor 304 drives the drive screw 307 to rotate. The rotation of the drive screw 307 can drive the mating rod 308 and the center block 314 to move up and down along the drive screw 307. C-shaped mounting plates 313 are rotatably mounted on both sides of the center block 314. The two C-shaped mounting plates 313 can rotate around the center block 314. The C-shaped mounting plate 313 has transmission side plates 315 rotatably mounted at both ends. Each transmission side plate 315 has a side mounting sheet metal 321 rotatably mounted at its lower end. A central shaft 312 is fixedly connected to the lower ends of both side mounting sheet metals 321. An assembly plate 310 is fixedly connected between the two side mounting sheet metals 321. A sound output module 311 is installed inside the assembly plate 310. A central shaft 312 is fixedly connected to the outer side of the lower end of each side mounting sheet metal 321. The central shaft 312 is rotatably mounted above the H-shaped mounting plate 107. The C-shaped mounting plate 313 can push the assembly plate 310 to rotate around the central shaft 312 through the transmission side plates 315.

[0033] like Figure 10As shown, the upper end of the mating rod 308 is fixedly fitted with an installation sleeve 309. An installation slide rail 317 is fixedly connected to one side of the installation sleeve 309. Two extended maze plates 316 are installed on one side of the installation slide rail 317. Push rods 318 are rotatably installed on the inner side of the same end of the two extended maze plates 316. C-shaped connecting seats 320 are rotatably installed on the other end of the two push rods 318. A side slide rail 319 is installed on one side of the C-shaped connecting seat 320. The side slide rail 319 is fixedly connected to one side of the inner wall of the extended speaker box 301. When the second motor 304 and the motor base 305 move horizontally along the upper slide rail 306, the C-shaped connecting seat 320 will rise and fall along the side slide rail 319. When the distance between the installation slide rail 317 and the side slide rail 319 is shortened, the two extended maze plates 316 are pushed to extend to both sides along the installation slide rail 317 after being limited by the push rod 318.

[0034] like Figures 6-7 As shown, the self-cleaning mechanism 200 includes a slip ring 201. Side connecting plates 203 are fixedly connected to both sides of the slip ring 201. The slip ring 201 is fixedly connected to one side surface of the H-shaped mounting plate 107 via the side connecting plates 203. An arc-shaped slider 204 is installed inside one side of the slip ring 201. A rotating shaft 205 is rotatably mounted on the middle of one side of the arc-shaped slider 204. A gear ring 202 is fixedly connected to the outer edge of the slip ring 201. A driven gear 206 is fixedly sleeved on the upper end of the rotating shaft 205. The driven gear 206 meshes with the gear ring 202. The rotating shaft 205... A cleaning brush 209 is fixedly connected to the lower end. The rotation of the rotating shaft 205 drives the arc-shaped slider 204 to rotate along the slip ring 201 through the driven gear 206. The rotation of the rotating shaft 205 drives the cleaning brush 209 to clean the dust on the surface of the sound output module 311. The cleaning brush 209 is also fitted with a mating gear 207. There are two mating gears 207. The other mating gear 207 is fixedly fitted to the output shaft of the first motor 208. The first motor 208 is fixedly connected to the lower surface of the arc-shaped slider 204. The first motor 208 drives the rotating shaft 205 to rotate through the mating gear 207.

[0035] The working principle of this invention is as follows: When the volume of the sound cavity is adjusted according to actual application needs, pulling the pull ring 303 will extend the extended speaker 301 along the speaker housing 101. At the same time, the second motor 304 is started to drive the drive screw 307 to rotate. The rotation of the drive screw 307 will drive the mating rod 308 and the center block 314 to rise and fall. The center block 314 is connected to the side mounting sheet metal 321 through the transmission side plate 315, which can drive the mounting plate 310 to rotate around the central axis 312. By adjusting the mounting plate 310 to an inclined position, the mounting plate 310 can be rotated. The sound output module 311 on the 10 transmits music to the expansion speaker 301 and the speaker housing 101. At the same time, the area of ​​the two extended labyrinth plates 316 is reduced, so that the music is transmitted within a large-volume acoustic cavity. When the expansion speaker 301 is retracted into the speaker housing 101, the mating rod 308 moves to the upper end of the drive screw 307, thereby driving the mounting plate 310 to reset above the H-shaped mounting plate 107. When the expansion speaker 301 descends, the transmission side plate 315 and the side mounting sheet metal 321 fold and retract, simultaneously pushing the drive screw 307 and the mating rod. 308, the second motor 304, and the motor base 305 move horizontally along the upper slide rail 306. At this time, the two extended labyrinth plates 316 are limited by the push rod 318, and then pushed to extend to both sides along the mounting slide rail 317. The large-area extended labyrinth plates 316 can make the sound played by the speaker more three-dimensional when facing a small-volume sound cavity. In the actual application of the speaker, when the speaker is overloaded, the electric push rod 109 drives the connecting guide block 110 to move horizontally, which can quickly power on and power off the output module 311. When the speaker is overloaded, the power can be cut off in time to improve the speaker's safety. When the speaker is used for a long time, the sound output module 311 needs to be cleaned of dust on its surface regularly, otherwise the sound quality will be affected. The first motor 208 is started and drives the rotating shaft 205 to rotate through the gear 207. The rotation of the rotating shaft 205 can drive the cleaning brush 209 to clean the dust on the surface of the sound output module 311. At the same time, it can also drive the arc slider 204 to rotate along the slip ring 201 to achieve the effect of cleaning the dust on the surface of the sound output module 311.

[0036] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments that can be applied to other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A portable speaker with adjustable acoustic cavity volume, comprising a speaker housing component (100), characterized in that: A self-cleaning mechanism (200) is installed on one side inside the speaker housing component (100), and a sound cavity adjustment mechanism (300) is installed on the other side inside the speaker housing component (100). The sound cavity adjustment mechanism (300) includes a sound output module (311) and an extension labyrinth plate (316). During the process of adjusting the sound cavity, the sound cavity adjustment mechanism (300) can also adjust the sound output module (311), and at the same time, the sound cavity adjustment mechanism (300) can also extend and adjust the extension labyrinth plate (316) during the process of adjusting the sound cavity. The speaker housing component (100) includes a speaker housing (101), an amplifier panel (103) is installed on one side of the speaker housing (101), a bass reflex port (105) is also installed on one side of the speaker housing (101), the bass reflex port (105) is located below the amplifier panel (103), and a support base (106) is fixedly connected to the lower surface of the speaker housing (101). The acoustic cavity adjustment mechanism (300) includes an extended speaker (301), which is telescopically mounted on the rear side of the upper surface of the speaker housing (101). A fixing plate (302) is fixedly connected to the upper surface of the extended speaker (301), and a pull ring (303) is rotatably mounted on the upper surface of the fixing plate (302). An upper slide rail (306) is fixedly connected to the inner wall of the extended speaker (301). A motor mount (305) is mounted on the upper slide rail (306). A second motor (304) is fixedly connected to the lower surface of the motor mount (305). A drive screw (307) is fixedly connected to the output shaft of the second motor (304). A mating rod (308) is engaged with the drive screw (307). A center block (314) is fixedly connected to the lower end of the mating rod (308). C-shaped mounting plates (313) are rotatably mounted on both sides of the center block (314). The C-shaped mounting plate (313) has transmission side plates (315) rotatably mounted at both ends. Each transmission side plate (315) has a side mounting sheet metal (321) rotatably mounted at its lower end. The lower ends of the two side mounting sheet metals (321) are fixedly connected to a central shaft (312). An assembly plate (310) is fixedly connected between the two side mounting sheet metals (321). A sound output module (311) is installed inside the assembly plate (310). The lower outer side of each side mounting sheet metal (321) is fixedly connected to a central shaft (312). The central shaft (312) is rotatably mounted above the H-shaped mounting plate (107). The upper end of the mating rod (308) is fixedly fitted with a mounting sleeve (309). A mounting slide rail (317) is fixedly connected to one side of the mounting sleeve (309). Two extended labyrinth plates (316) are installed on one side of the mounting slide rail (317). Push rods (318) are rotatably mounted on the inner side of the same end of the two extended maze plates (316), and C-shaped connectors (320) are rotatably mounted on the other end of the two push rods (318). A side slide rail (319) is mounted on one side of the C-shaped connector (320), and the side slide rail (319) is fixedly connected to one side of the inner wall of the extended speaker (301).

2. The portable speaker with adjustable acoustic cavity volume according to claim 1, characterized in that: The upper surface of the speaker housing (101) is provided with a control panel (102). An H-shaped mounting plate (107) is fixedly connected to the middle of the inner wall of the speaker housing (101). Sound insulation cotton (104) is provided on both sides near the outer wall of the amplifier (103). The sound insulation cotton (104) is fixedly connected to the inner wall of the speaker housing (101). A circuit back plate (112) is fixedly connected to the other side surface of the speaker housing (101). A power supply (108) is electrically connected to one side surface of the circuit back plate (112). The power supply (108) is located inside the rear of the speaker housing (101).

3. A portable speaker with adjustable acoustic cavity volume according to claim 2, characterized in that: An electric push rod (109) is fixedly connected to one side surface of the power supply (108). The output shaft of the electric push rod (109) is fixedly connected to a connecting guide block (110). The connecting guide block (110) is L-shaped. One end of the connecting guide block (110) is electrically connected to the power supply (108), and the other end of the connecting guide block (110) is electrically connected to the sound output module (311). Protrusions (111) are fixedly connected to both sides of the inner wall of the speaker housing (101).

4. A portable speaker with adjustable acoustic cavity volume according to claim 1, characterized in that: The self-cleaning mechanism (200) includes a slip ring (201), with side connecting plates (203) fixedly connected to both sides of the slip ring (201). The slip ring (201) is fixedly connected to one side surface of the H-shaped mounting plate (107) through the side connecting plates (203). An arc-shaped slider (204) is installed on one side inside the slip ring (201). A rotating shaft (205) is rotatably installed in the middle of one side of the arc-shaped slider (204). A gear ring (202) is fixedly connected to the outer edge of the slip ring (201).

5. A portable speaker with adjustable acoustic cavity volume according to claim 4, characterized in that: A driven gear (206) is fixedly sleeved on the upper end of the rotating shaft (205), and the driven gear (206) is meshed with the gear ring (202). A cleaning brush (209) is fixedly connected to the lower end of the rotating shaft (205). A matching gear (207) is also sleeved on the cleaning brush (209). There are two matching gears (207). The other matching gear (207) is fixedly sleeved on the output shaft of the first motor (208). The first motor (208) is fixedly connected to the lower surface of the arc-shaped slider (204).

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