Portable sound box with protection function

Abstract

The invention belongs to the technical field of audio playing equipment, and particularly relates to a portable sound box with a protection function, which comprises a sound box main body, a control mainboard is arranged in the sound box main body, two moving wheels are arranged on one side of the bottom of the sound box main body, and a bearing base is mounted on one side, far away from the moving wheels, of the bottom of the sound box main body. A pull rod assembly is installed on the back of the loudspeaker box body. The sound box can be conveniently carried to move outdoors, early warning is given to people in advance by monitoring the concave-convex condition of a moving route in real time, internal elements of the sound box body are prevented from being damaged by large pits in the road surface, resistance can be automatically increased when the sound box meets the concave-convex road surface, people are reminded, the moving speed is slowed down, vibration is reduced, and the sound box body is protected; and meanwhile, when the output power of the sound box is too large, gas can be automatically generated to assist heat dissipation, and early warning is performed continuously for a long time when the power fluctuation is large, so that long-time high-frequency and high-power work of the assembly is avoided, and the service life of the sound box is prolonged.

Description

Technical Field

[0001] The invention belongs to the technical field of audio playing equipment, and in particular relates to a portable sound box with a protection function. Background Art

[0002] In modern life, people's social and entertainment activities are becoming more and more diverse. They are no longer limited to indoors. Square dancing, outdoor performances, camping parties and other scenes are becoming more and more frequent. People's demand for being able to enjoy high-quality music anytime and anywhere has risen sharply.

[0003] At present, in order to meet the requirements of outdoor activities for the portability of speakers, a structure that facilitates movement is generally installed on the speakers. For example, the portable trolley speaker disclosed in patent announcement number CN103686493B can be easily carried and moved by using a telescopic trolley with moving wheels. When moving the speaker outdoors, due to the complex outdoor road conditions and the seldom completely flat road surface, the speaker is very likely to vibrate violently due to the bumpy road surface. Although the mobile wheels equipped with a shock-absorbing structure can alleviate some of the vibration and reduce the impact on the internal components of the speaker, when encountering a severely uneven road surface, the vibration amplitude far exceeds the buffering capacity of the shock-absorbing wheels, resulting in a significant reduction in the protection of the internal components of the speaker. Summary of the invention

[0004] The purpose of the present invention is to provide a portable speaker with a protective function in view of the above problems.

[0005] To achieve the above object, the present invention adopts the following technical solutions: a portable speaker with protective function, comprising a speaker body, a control mainboard is arranged inside the speaker body, two moving wheels are arranged on one side of the bottom of the speaker body, and a supporting base is installed on the side of the bottom of the speaker body away from the moving wheels, a pull rod assembly is installed on the back of the speaker body, and further comprises: A back plate is arranged on the outside of the speaker body, a connecting frame is fixedly installed on the upper back side of the speaker body, and the back plate is hinged to the side wall of the connecting frame, and an upper installation cavity and a lower installation cavity are arranged inside the back plate; A follow-up adjustment unit is installed inside the lower installation cavity; A tilt detection unit, installed at the bottom of the speaker body, for detecting the tilt of the speaker body; A tilt compensation unit is installed inside the upper installation cavity, the control mainboard controls the tilt compensation unit to work according to the electrical signal output by the tilt detection unit, and the tilt compensation unit and the follow-up adjustment unit are electrically connected to the measurement circuit of the control mainboard; A resistance increasing unit, installed at the bottom of the speaker body, for applying rotational resistance to the two moving wheels; A heat dissipation unit is installed on the outer side wall of the speaker body; The gas production unit is installed on the side wall of the back plate, and the gas production unit is connected to the tilt compensation unit, and the gas production unit is communicated with the heat dissipation unit.

[0006] Preferably, the follow-up adjustment unit includes a lower insulating plate slidably arranged inside the lower mounting cavity, and two vertical rods are fixedly installed on the bottom of the lower insulating plate, both of the two vertical rods are slidably connected to the lower cavity wall of the lower mounting cavity, and the bottoms of the two vertical rods are fixedly connected to follow-up wheels, a lower resistor bar is fixedly installed on the cavity wall of the lower mounting cavity, a lower conductive block is installed on the side wall of the lower insulating plate, and the lower conductive block is in sliding contact with the side wall of the lower resistor bar.

[0007] Preferably, the tilt detection unit includes a hollow plate fixedly mounted on the bottom of the speaker body, and a counterweight block is slidably connected to the inside of the hollow plate, a tension sensor is fixedly mounted on the inner wall of one side of the hollow plate, and a pull rope is fixedly provided between the detection end of the tension sensor and the side wall of the counterweight block.

[0008] Preferably, the tilt compensation unit includes a compensation electromagnetic push rod fixedly mounted on the upper cavity wall of the upper mounting cavity, the telescopic end of the compensation electromagnetic push rod is mounted with an upper insulating plate, and the side wall of the upper insulating strip is fixedly mounted with an upper conductive block, the cavity wall of the upper mounting cavity is fixedly mounted with an upper resistor bar, and the upper conductive block is in sliding contact with the side wall of the upper resistor bar, the control main board controls the operation of the compensation electromagnetic push rod according to the electrical signal output by the tension sensor, and the upper conductive block, upper resistor bar, lower conductive block and lower resistor bar are electrically connected to the measurement circuit of the control main board.

[0009] Preferably, the resistance increasing unit includes a connecting strip fixedly installed at the bottom of the speaker body, and the side walls of the connecting strip are located on one side of the two moving wheels and are fixedly plugged with pressure electromagnetic push rods, and the telescopic ends of the two pressure electromagnetic push rods are installed with arc strips, and the inner arc surfaces of the two arc strips are fixedly installed with arc rubber pads, and the pressure electromagnetic push rods are electrically connected to the control main board.

[0010] Preferably, the heat dissipation unit includes two sealing covers fixedly mounted on the outer side walls of the speaker body, a plurality of heat-conducting columns are arranged on the inner sides of the two sealing covers, and one end of each heat-conducting column away from the sealing cover extends to the inner side of the speaker body, a ventilation plate is fixedly mounted on the back of the speaker body, and the interior of the ventilation plate is hollow, and a connecting hard pipe is fixedly connected between the side walls of the ventilation plate and the two sealing covers.

[0011] Preferably, the gas production unit includes a hollow bar fixedly mounted on the side wall of the back plate, and a pressure plate is slidably connected to the inside of the hollow bar, an elastic airbag sleeve and a plurality of springs are fixedly provided between the bottom of the pressure plate and the inner bottom of the hollow bar, each of the springs is arranged on the inner side of the elastic airbag sleeve, the bottom of the hollow bar is provided with an air inlet and an air outlet connected to the elastic airbag sleeve, and a one-way valve is installed inside the air inlet and the air outlet, the outer side of the back plate is provided with a frame-type air guide cover, and the frame-type air guide cover and the air outlet are jointly fixedly connected to an air outlet pipe, and the frame-type air guide cover and the ventilation plate are jointly fixedly connected to a connecting hose, a U-shaped connecting rod is fixedly mounted on the end surface of the upper insulating plate, and the rod wall of the U-shaped connecting rod is slidably connected to the top of the hollow bar, one end of the U-shaped connecting rod located inside the hollow bar is fixedly connected to an elastic impact pad, and the elastic impact pad is arranged above the pressure plate, and the side wall of the upper mounting cavity is provided with a strip hole matching the U-shaped connecting rod.

[0012] Preferably, the side walls of the two sealing covers away from the same side connecting hard pipe are provided with air holes, and an air pressure switch is fixedly installed inside one of the sealing covers, and the air pressure switch is electrically connected to the control mainboard.

[0013] Compared with the existing technology, the advantages of a portable speaker with protection function are: Through the mutual cooperation of the speaker main body, control main board, moving wheels, supporting base and pull rod assembly, the speaker can be conveniently carried and moved outdoors, and through the mutual cooperation of the back panel, connecting frame, upper mounting cavity, lower mounting cavity, follow-up adjustment unit, tilt compensation unit and tilt detection unit, when the speaker main body is pulled to move, the unevenness on the moving route can be monitored in real time in advance, and after the uneven position is detected, an early warning can be issued to the personnel in time, so as to avoid moving on a road with a large degree of unevenness as much as possible, which may cause damage to the internal components of the speaker main body, and can automatically compensate based on the tilt angle of the speaker main body, thereby improving the accuracy of the early warning information on uneven road surface.

[0014] By setting up a resistance-increasing unit, the rotational resistance of the two moving wheels can be automatically increased when the speaker body moves to a position where the road surface is uneven, so that personnel can be reminded by suddenly increasing the moving resistance, ensuring that personnel can get the warning information in time. Secondly, when it is impossible to avoid the uneven road surface, the moving speed can be actively slowed down. By moving at a low speed, the vibration amplitude can be reduced, thereby improving the protection effect of the speaker body.

[0015] Through the set heat dissipation unit and air production unit, when the speaker body is in use, based on the working current of the speaker body, when the output power of the speaker is too large, airflow can be automatically generated to assist the speaker body in heat dissipation. Secondly, in conjunction with the set air holes and air pressure switches, when the output power fluctuation of the speaker body is too large and lasts for a long time, an early warning message can be automatically issued to personnel, thereby avoiding the diaphragm and other components of the speaker body from working at high frequency and high power for a long time, which is beneficial to extending the service life of the speaker body. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front three-dimensional structural schematic diagram of a portable sound box with a protective function provided by the present invention; Figure 2 It is a schematic diagram of the back three-dimensional structure of a portable speaker with a protective function provided by the present invention; Figure 3 It is a schematic diagram of the internal upper structure of the back panel of a portable speaker with a protective function provided by the present invention; Figure 4 It is a schematic diagram of the internal lower side structure of a back plate of a portable speaker with a protective function provided by the present invention; Figure 5 It is a schematic diagram of the internal structure of a hollow plate of a portable sound box with a protective function provided by the present invention; Figure 6 The invention provides a portable speaker with a protective function. Figure 3 A magnified view of the structure of part A; Figure 7 It is a schematic diagram of the internal structure of a sealed cover of a portable sound box with a protective function provided by the present invention; Figure 8 The invention provides a portable speaker with a protective function. Figure 7 A magnified view of the structure of part B; Fig. 9 The invention provides a portable speaker with a protective function. Figure 4 A magnified view of the structure of part C.

[0017] In the figure: 1 speaker body, 2 control main board, 3 moving wheel, 4 supporting base, 5 pull rod assembly, 6 back plate, 7 connecting frame, 8 upper mounting cavity, 9 lower mounting cavity, 10 follow-up adjustment unit, 101 lower insulating plate, 102 vertical rod, 103 follow-up wheel, 104 lower resistance bar, 105 lower conductive block, 11 tilt detection unit, 111 hollow plate, 112 counterweight block, 113 tension sensor, 114 pull rope, 12 tilt compensation unit, 121 compensation electromagnetic push rod, 122 upper insulating plate, 123 upper conductive block, 124 upper resistance bar, 13 resistance increase Unit, 131 connecting strip, 132 pressure electromagnetic push rod, 133 arc strip, 134 arc rubber pad, 14 heat dissipation unit, 141 sealing cover, 142 heat conducting column, 143 ventilation plate, 144 connecting hard pipe, 15 gas production unit, 151 hollow strip, 152 pressure plate, 153 elastic air bag cover, 154 spring, 155 air inlet, 156 air outlet, 157 one-way valve, 158 frame-type air guide cover, 159 outlet pipe, 16 connecting hose, 17 U-shaped connecting rod, 18 elastic impact pad, 19 strip hole, 20 air vent, 21 air pressure switch. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0019] like Figure 1-Figure 9 As shown, a portable speaker with a protective function includes a speaker body 1, a control main board 2 is arranged inside the speaker body 1, two moving wheels 3 are arranged on one side of the bottom of the speaker body 1, and a supporting base 4 is installed on the side of the bottom of the speaker body 1 away from the moving wheels 3, a pull rod assembly 5 is installed on the back of the speaker body 1, and also includes: a back plate 6, the back plate 6 is arranged on the outside of the speaker body 1, a connecting frame 7 is fixedly installed on the upper side of the back of the speaker body 1, and the back plate 6 is hinged to the side wall of the connecting frame 7, an upper mounting cavity 8 and a lower mounting cavity 9 are arranged inside the back plate 6, a follow-up adjustment unit 10 is installed inside the lower mounting cavity 9, and the follow-up adjustment unit 10 is installed inside the lower mounting cavity 9. The unit 10 includes a lower insulating plate 101 slidably arranged inside the lower mounting cavity 9, and two vertical rods 102 are fixedly installed at the bottom of the lower insulating plate 101, and the two vertical rods 102 are both slidably connected to the lower cavity wall of the lower mounting cavity 9, and the bottoms of the two vertical rods 102 are fixedly connected to follower wheels 103, a lower resistor bar 104 is fixedly installed on the cavity wall of the lower mounting cavity 9, a lower conductive block 105 is installed on the side wall of the lower insulating plate 101, and the lower conductive block 105 is in sliding contact with the side wall of the lower resistor bar 104, the back plate 6 is made of magnetic isolation and insulating material, and an insulating elastic support pad is provided at the connection between the lower conductive block 105 and the lower insulating plate 101.

[0020] The tilt detection unit 11 is installed at the bottom of the speaker body 1 and is used to detect the inclination of the speaker body 1. The tilt detection unit 11 includes a hollow plate 111 fixedly installed at the bottom of the speaker body 1, and a counterweight block 112 is slidably connected inside the hollow plate 111. A tension sensor 113 is fixedly installed on the inner wall of one side of the hollow plate 111, and a pull rope 114 is fixedly provided between the detection end of the tension sensor 113 and the side wall of the counterweight block 112. The tension sensor 113 can convert the tension into an electrical signal and output it to the control main board 2. The greater the tension, the greater the strength of the electrical signal output by the tension sensor 113 to the control main board 2.

[0021] The tilt compensation unit 12 is installed inside the upper mounting cavity 8. The control mainboard 2 controls the tilt compensation unit 12 to work according to the electrical signal output by the tilt detection unit 11. The tilt compensation unit 12 and the follow-up adjustment unit 10 are electrically connected to the measurement circuit of the control mainboard 2. The tilt compensation unit 12 includes a compensation electromagnetic push rod 121 fixedly installed on the upper cavity wall of the upper mounting cavity 8. The telescopic end of the compensation electromagnetic push rod 121 is installed with an upper insulating plate 122, and the side wall of the upper insulating strip is fixedly installed with an upper conductive block 123. The cavity wall of the upper mounting cavity 8 is fixedly installed with an upper resistor bar 124, and the upper conductive block 123 is in sliding contact with the side wall of the upper resistor bar 124. The control mainboard 2 controls the compensation electromagnetic push rod 121 to work according to the electrical signal output by the tension sensor 113. The upper conductive block 123, the upper resistor bar 124, the lower conductive block 105 and the lower resistor bar 104 are electrically connected to the measurement circuit of the control mainboard 2, and an insulating elastic support pad is provided at the connection between the upper conductive block 123 and the upper insulating plate 122.

[0022] The resistance increasing unit 13 is installed at the bottom of the speaker body 1, and is used to apply rotational resistance to the two moving wheels 3. The resistance increasing unit 13 includes a connecting strip 131 fixedly installed at the bottom of the speaker body 1, and the side walls of the connecting strip 131 are located on one side of the two moving wheels 3 and are fixedly plugged with pressure electromagnetic push rods 132, and the telescopic ends of the two pressure electromagnetic push rods 132 are installed with arc strips 133, and the inner arc surfaces of the two arc strips 133 are fixedly installed with arc rubber pads 134, the pressure electromagnetic push rods 132 are electrically connected to the control main board 2, and the arc rubber pads 134 and the arc strips 133 are removable and replaceable.

[0023] The heat dissipation unit 14 is installed on the outer wall of the speaker body 1. The heat dissipation unit 14 includes two sealing covers 141 fixedly installed on the outer wall of the speaker body 1. A plurality of heat-conducting columns 142 are arranged on the inner sides of the two sealing covers 141, and one end of each heat-conducting column 142 away from the sealing cover 141 extends to the inner side of the speaker body 1. A ventilation plate 143 is fixedly installed on the back of the speaker body 1, and the interior of the ventilation plate 143 is hollow. A connecting hard pipe 144 is fixedly connected between the side wall of the ventilation plate 143 and the two sealing covers 141. The heat-conducting columns 142 can export the heat inside the speaker body 1.

[0024] The gas production unit 15 is installed on the side wall of the back plate 6, and the gas production unit 15 is connected to the tilt compensation unit 12, and the gas production unit 15 is connected to the heat dissipation unit 14. The gas production unit 15 includes a hollow bar 151 fixedly installed on the side wall of the back plate 6, and a pressure plate 152 is slidably connected inside the hollow bar 151, and an elastic air bag cover 153 and a plurality of springs 154 are fixedly arranged between the bottom of the pressure plate 152 and the inner bottom of the hollow bar 151, and each spring 154 is arranged on the inner side of the elastic air bag cover 153. An air inlet 155 and an air outlet 156 connected to the elastic air bag cover 153 are opened at the bottom of the hollow bar 151, and a one-way valve 157 is installed inside the air inlet 155 and the air outlet 156. The outer surface of the back plate 6 The side sleeve is provided with a frame-type air guide cover 158, and the frame-type air guide cover 158 and the air outlet hole 156 are fixedly connected to an air outlet pipe 159, the frame-type air guide cover 158 and the ventilation plate 143 are fixedly connected to a connecting hose 16, a U-shaped connecting rod 17 is fixedly installed on the end surface of the upper insulating plate 122, and the rod wall of the U-shaped connecting rod 17 is slidably connected to the top of the hollow bar 151, and one end of the U-shaped connecting rod 17 located inside the hollow bar 151 is fixedly connected to an elastic impact pad 18, and the elastic impact pad 18 is arranged above the pressure plate 152, and the side wall of the upper mounting cavity 8 is provided with a strip hole 19 matching the U-shaped connecting rod 17, and the elastic impact pad 18 can avoid the noise generated when impacting the pressure plate 152 to affect the audio playback effect of the speaker body 1.

[0025] The side walls of the two sealing covers 141 away from the same-side connecting rigid tube 144 are both provided with air vents 20. An air pressure switch 21 is fixedly installed inside one of the sealing covers 141, and the air pressure switches 21 are electrically connected to the control main board 2. When the moving contacts of the air pressure switch 21 are subjected to the high air pressure, the moving contacts will be back-pressed and closed, thereby feeding back an electrical signal to the control main board 2.

[0026] The operating principle of the present invention is now described as follows: when moving the speaker body 1, the pull rod of the pull rod assembly 5 is pulled upward (the pull rod assembly 5 generally includes components such as a pull rod, a handle, a storage seat, and a clamping structure), and tilted to one side of the pull rod assembly 5 at a certain angle. At this time, by pulling the pull rod assembly 5, the two moving wheels 3 at the bottom of the speaker body 1 can be used to move the speaker body 1. Before moving the speaker body 1, the control main board 2 is started; When the speaker body 1 tilts and moves, since the back plate 6 is hinged with the connecting frame 7, under the action of gravity, the back plate 6 still maintains a vertical state, and because the speaker body 1 tilts, the distance between the bottom of the back plate 6 and the ground becomes closer, so that the two follower wheels 103 are in contact with the ground, and when the speaker body 1 tilts, the speaker body 1 will drive the hollow plate 111 to tilt synchronously. Initially, the hollow plate 111 is in a horizontal state, and the counterweight block 112 is in the middle position of the hollow plate 111. As the hollow plate 111 tilts, under the action of gravity, the counterweight block starts to slide to one side, thereby applying a downward pulling force to the detection end of the tension sensor 113. When the tilt angle is larger, the downward pulling force of the counterweight 112 on the detection end of the tension sensor 113 is larger. When the tension sensor 113 detects a larger pulling force, the strength of the electrical signal output to the control mainboard 2 is larger. The control mainboard 2 controls the current strength input to the compensation electromagnetic push rod 121 to increase synchronously. Therefore, the distance that the compensation electromagnetic push rod 121 pushes the upper insulating plate 122 downward is synchronously increased. When the tilt angle of the speaker body 1 is larger, the distance between the bottom of the back plate 6 and the ground is smaller. At this time, since the two follower wheels 103 are on the ground, the contact position between the lower resistor bar 104 inside the back plate 6 and the lower conductive block 105 moves upward relatively. Therefore, When the inclination angle of the speaker body 1 is larger, the contact position of the lower conductive block 105 and the lower resistor bar 104 is higher. When the contact point of the lower conductive block 105 and the lower resistor bar 104 is higher, the length of the lower resistor bar 104 connected to the connection loop of the lower conductive block 105, the upper conductive block 123 and the upper conductive bar becomes longer. Therefore, the connection loop resistance of the lower resistor bar 104, the lower conductive block 105, the upper conductive block 123 and the upper conductive bar becomes larger, which will affect the accuracy of the unevenness detection. However, since the compensation electromagnetic push rod 121 increases the distance of pushing the upper insulating plate 122 with the increase of the inclination angle of the speaker body 1, the upper conductive block The contact point between 123 and the upper resistor bar 124 moves downward relatively. At this time, the length of the connection loop between the upper resistor bar 124 and the upper conductive block 123, the lower conductive block 105 and the lower resistor bar 104 becomes shorter. Therefore, although the inclination angle of the speaker body 1 is different, the positions of the upper conductive block 123 and the lower conductive block 105 will change synchronously with the change of the inclination angle of the speaker body 1, so that the resistance of the overall connection loop of the upper conductive block 123, the upper resistor bar 124, the lower conductive block 105 and the lower resistor bar 104 remains unchanged under normal road conditions, thereby avoiding the detection of road surface flatness being affected by the different inclination angles of the speaker body 1. When the speaker body 1 encounters an uneven road surface during its movement, the two follower wheels 103 will move up and down due to the uneven road surface. For example, when the height of the road surface protrusion is higher, the follower wheel 103 will move toward the back plate 6, so that the contact point between the lower conductive block 105 and the lower resistor bar 104 moves upward relatively. At this time, the overall resistance of the connection loop of the lower conductive block 105, the lower resistor bar 104, the upper conductive block 123 and the upper resistor bar 124 becomes larger, and the measurement circuit of the control main board 2 detects that the current intensity of the connection loop of the lower conductive block 105, the lower resistor bar 104, the upper conductive block 123 and the upper resistor bar 124 becomes smaller synchronously. On the contrary, when the speaker body 1 moves to a concave part of the road surface, the measurement circuit of the control main board 2 detects that the lower conductive block 105, the lower resistor bar 104, the upper conductive block 1 The current intensity of the connection loop 23 and the upper resistor strip 124 increases synchronously. When the road surface is less uneven, the amplitude of the up and down movement of the follower wheel 103 is small. At this time, the current intensity detected by the measurement circuit of the control main board 2 is between 10 mA and 16 mA. When the road surface is more uneven, the current intensity detected by the measurement circuit of the control main board 2 is lower than 10 mA or higher than 16 mA. At this time, the control main board 2 will issue an early warning through its own early warning module, for example, through a buzzer to remind personnel. After hearing the early warning information, the personnel should promptly control the movement direction of the speaker body 1 to change to avoid the unevenness of the road surface, so as to avoid the speaker body 1 from passing through a road surface with a larger amplitude of unevenness as much as possible, and avoid damage to the internal components of the speaker body 1 caused by excessive movement and vibration; Secondly, when the control mainboard 2 issues an early warning message through its own early warning module, it will also synchronously control the two pressure electromagnetic push rods 132 to work. The two pressure electromagnetic push rods 132 will push the arc strip 133 on the same side to move, so that the two arc rubber pads 134 are respectively against the corresponding wheel walls of the moving wheel 3, thereby increasing the resistance to the moving wheel 3. Since the resistance to the rotation of the moving wheel 3 increases, the normal walking personnel will feel the sudden increase in resistance, so that the increased resistance can be used to remind the personnel to take a detour. Secondly, when the uneven road surface covers a large area, or it is not convenient to change the route, or the personnel do not notice the early warning message, the personnel pull the speaker body 1 to continue walking along the original route. At this time, due to the increase in resistance to the moving wheel 3, the personnel pull the speaker body 1 to move slower. Therefore, when walking on a road with a large uneven amplitude, the moving speed of the speaker body 1 can be slowed down, thereby slowing down the vibration amplitude generated by the movement of the speaker body 1, and reducing the impact of the vibration on the speaker body 1; After the speaker body 1 is moved into position, the personnel rotates the speaker body 1 to a vertical position. At this time, the speaker body 1 is supported by the supporting base 4, and then the playback function is started by the control mainboard 2. The control mainboard 2 controls the speaker body 1 to work to play audio. When the control mainboard 2 starts the playback function, it will control the compensation electromagnetic push rod 121 to work synchronously according to the electrical signal amplified by its own power amplifier (the power amplifier amplifies the input weak audio electrical signal to sufficient power and then transmits it to the voice coil in the speaker). When the playback sound is relatively low, , the output power of the speaker body 1 is low, at this time, the vibration force on the diaphragm and other components of the speaker body 1 is relatively small, and after the power of the speaker body 1 is increased, the vibration force on the diaphragm and other components of the speaker body 1 increases synchronously. For example, when playing a powerful song, the diaphragm vibrates with a large amplitude and a high frequency. When the power output of the speaker body 1 increases, the current intensity of the speaker body 1 passing through the compensation electromagnetic push rod 121 also increases synchronously, thereby increasing the distance that the upper insulating plate 122 can be pushed downward, and the connection through the U-shaped connecting rod 17 The elastic impact pad 18 moves downward synchronously and impacts the pressure plate 152, so that the elastic airbag cover 153 below the pressure plate 152 can be pushed and squeezed. Under the squeezing effect, the air inside the elastic airbag cover 153 will be discharged into the frame-type air guide cover 158 through the air outlet hole 156 and the air outlet pipe 159 (under the action of the one-way valve 157, the air can only enter the elastic airbag cover 153 through the air inlet hole 155 and can only be discharged through the air outlet hole 156), and the air inside the frame-type air guide cover 158 enters the ventilation plate 158 through the connecting hose 16. 43, and then enter the two sealed covers 141 through the two connecting hard pipes 144, and finally discharged through the vent hole 20. When the airflow passes through the sealed cover 141, the airflow can take away the heat of the heat-conducting column 142, and the heat-conducting column 142 can export the heat inside the speaker body 1, thereby assisting the cooling and heat dissipation inside the speaker body 1. When the output power of the speaker body 1 increases, the heat generated by its internal components such as the voice coil increases synchronously. Therefore, by generating airflow at this time, the timeliness of the heat dissipation inside the speaker body 1 can be ensured; Secondly, when the speaker body 1 maintains high-frequency and high-output power operation for a long time, since the current intensity output to the compensation electromagnetic push rod 121 changes synchronously, the amplitude and frequency of the elastic impact pad 18 impacting the extrusion pressure plate 152 increase synchronously, thereby causing the generated air volume to continue to increase, and the two sealing covers 141 are only exhausted through one of their own air holes 20, and the air flow cannot be discharged in time, so the air pressure inside the two sealing covers 141 will gradually increase. As the air pressure increases, the moving contact of the air pressure switch 21 will close under the action of the air pressure. After the control main board 2 receives the electrical signal fed back by the air pressure switch 21, it will send out a warning message through its own warning module, such as using lights to remind personnel, so as to remind personnel to avoid keeping the speaker body 1 at high-frequency and high-output power for a long time, and to prevent the diaphragm and other components from affecting their own service life due to long-term continuous high-frequency and high-output power operation.

[0027] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A portable speaker with protective function, comprising a speaker body (1), a control main board (2) being arranged inside the speaker body (1), two moving wheels (3) being arranged on one side of the bottom of the speaker body (1), and a supporting base (4) being installed on the side of the bottom of the speaker body (1) away from the moving wheels (3), and a pull rod assembly (5) being installed on the back of the speaker body (1), characterized in that: Also includes: A back panel (6) is arranged on the outside of the speaker body (1); a connecting frame (7) is fixedly mounted on the upper back side of the speaker body (1); the back panel (6) is hingedly connected to the side wall of the connecting frame (7); an upper mounting cavity (8) and a lower mounting cavity (9) are arranged inside the back panel (6); A follow-up adjustment unit (10) is installed inside the lower installation cavity (9); A tilt detection unit (11), installed at the bottom of the speaker body (1), and used to detect the tilt of the speaker body (1); A tilt compensation unit (12) is installed inside the upper installation cavity (8); the control mainboard (2) controls the tilt compensation unit (12) to operate according to an electrical signal output by the tilt detection unit (11); the tilt compensation unit (12) and the follow-up adjustment unit (10) are electrically connected to a measurement circuit of the control mainboard (2); A resistance increasing unit (13) is installed at the bottom of the speaker body (1) and is used to apply rotational resistance to the two moving wheels (3); A heat dissipation unit (14) mounted on the outer side wall of the speaker body (1); The gas production unit (15) is installed on the side wall of the back plate (6), and the gas production unit (15) is connected to the tilt compensation unit (12), and the gas production unit (15) is in communication with the heat dissipation unit (14).

2. A portable sound box with protection function according to claim 1, characterized in that: The follow-up adjustment unit (10) comprises a lower insulating plate (101) slidably arranged inside the lower installation cavity (9), and two vertical rods (102) are fixedly installed at the bottom of the lower insulating plate (101), and the two vertical rods (102) are both slidably connected to the lower cavity wall of the lower installation cavity (9), and the bottoms of the two vertical rods (102) are both fixedly connected to follower wheels (103), and the cavity wall of the lower installation cavity (9) is fixedly installed with a lower resistance bar (104), and the side wall of the lower insulating plate (101) is installed with a lower conductive block (105), and the lower conductive block (105) is in sliding contact with the side wall of the lower resistance bar (104).

3. A portable sound box with protection function according to claim 2, characterized in that: The tilt detection unit (11) comprises a hollow plate (111) fixedly mounted on the bottom of the sound box body (1), and a counterweight (112) is slidably connected inside the hollow plate (111), a tension sensor (113) is fixedly mounted on an inner wall of one side of the hollow plate (111), and a pull rope (114) is fixedly provided between a detection end of the tension sensor (113) and a side wall of the counterweight (112).

4. A portable sound box with protection function according to claim 3, characterized in that: The tilt compensation unit (12) comprises a compensation electromagnetic push rod (121) fixedly mounted on an upper cavity wall of an upper mounting cavity (8); an upper insulating plate (122) is mounted on a telescopic end of the compensation electromagnetic push rod (121); an upper conductive block (123) is fixedly mounted on a side wall of the upper insulating strip; an upper resistor strip (124) is fixedly mounted on the cavity wall of the upper mounting cavity (8); and the upper conductive block (123) is in sliding contact with a side wall of the upper resistor strip (124); the control mainboard (2) controls the operation of the compensation electromagnetic push rod (121) according to an electrical signal output by a tension sensor (113); and the upper conductive block (123), the upper resistor strip (124), the lower conductive block (105) and the lower resistor strip (104) are electrically connected to a measurement circuit of the control mainboard (2).

5. The portable sound box with protection function according to claim 1, characterized in that: The resistance increasing unit (13) comprises a connecting strip (131) fixedly mounted on the bottom of the sound box body (1), and the side walls of the connecting strip (131) are fixedly plugged with pressure electromagnetic push rods (132) at positions on one side of the two moving wheels (3), and the telescopic ends of the two pressure electromagnetic push rods (132) are both installed with arc strips (133), and the inner arc surfaces of the two arc strips (133) are both fixedly installed with arc rubber pads (134), and the pressure electromagnetic push rods (132) are electrically connected to the control mainboard (2).

6. The portable sound box with protection function according to claim 4, characterized in that: The heat dissipation unit (14) comprises two sealing covers (141) fixedly mounted on the outer side wall of the sound box body (1); a plurality of heat-conducting columns (142) are arranged on the inner side of the two sealing covers (141); and one end of each heat-conducting column (142) away from the sealing cover (141) extends to the inner side of the sound box body (1); a ventilation plate (143) is fixedly mounted on the back of the sound box body (1), and the interior of the ventilation plate (143) is hollow; and a connecting hard pipe (144) is fixedly connected between the side wall of the ventilation plate (143) and the two sealing covers (141).

7. The portable sound box with protection function according to claim 6, characterized in that: The gas production unit (15) comprises a hollow bar (151) fixedly mounted on the side wall of the back plate (6), and a pressure plate (152) is slidably connected inside the hollow bar (151), an elastic airbag sleeve (153) and a plurality of springs (154) are fixedly arranged between the bottom of the pressure plate (152) and the inner bottom of the hollow bar (151), and each of the springs (154) is arranged on the inner side of the elastic airbag sleeve (153), an air inlet (155) and an air outlet (156) connected to the elastic airbag sleeve (153) are opened at the bottom of the hollow bar (151), and a one-way valve (157) is installed inside the air inlet (155) and the air outlet (156), and the outer side of the back plate (6) is provided with a frame-shaped An air guide hood (158) is provided, and the frame-type air guide hood (158) and the air outlet hole (156) are fixedly connected to an air outlet pipe (159), the frame-type air guide hood (158) and the ventilation plate (143) are fixedly connected to a connecting hose (16), a U-shaped connecting rod (17) is fixedly installed on the end surface of the upper insulating plate (122), and the rod wall of the U-shaped connecting rod (17) is slidably connected to the top of the hollow bar (151), one end of the U-shaped connecting rod (17) located inside the hollow bar (151) is fixedly connected to an elastic impact pad (18), and the elastic impact pad (18) is arranged above the pressure plate (152), and a strip hole (19) matching the U-shaped connecting rod (17) is opened on the side wall of the upper mounting cavity (8).

8. The portable sound box with protection function according to claim 6, characterized in that: The side walls of the two sealing covers (141) away from the same-side connecting hard pipe (144) are both provided with air holes (20), and an air pressure switch (21) is fixedly installed inside one of the sealing covers (141), and the air pressure switch (21) is electrically connected to the control main board (2).

Images