Portable sound equipment overload protection box
The portable audio overload protection box, which uses a self-resetting fuse and a rotary rheostat audio overload protection circuit, solves the problem of damage to audio equipment when the power is overloaded, provides reliable protection, simplifies the equipment structure and reduces costs.
Patent Information
- Application Number
- CN202422802350.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-18
- Publication Date
- 2025-12-23
- Estimated Expiration
- 2034-11-18
AI Technical Summary
Existing audio equipment is prone to damage when overloaded, and built-in overload protection devices are bulky, complex in manufacturing, and expensive, leading to inconvenience and increased costs.
A portable audio overload protection box was designed, which includes an audio overload protection circuit, uses a self-resetting fuse and a rotary rheostat, connects the audio power amplifier and the audio speaker through a Nutrick connector, provides reliable overload protection, and adjusts the volume through the rotary rheostat.
It achieves compact and low-cost overload protection, is suitable for various audio equipment, simplifies the equipment structure, and reduces the difficulty of troubleshooting and operating costs.
Smart Images
Figure CN223714153U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of sound equipment, specifically relates to a portable sound equipment overload protection box. BACKGROUND
[0002] At present, various sound products on the market have been widely used in meeting security, music performance, leisure and entertainment places. In the traditional sound use scene, the audio power amplifier output is directly connected to the sound equipment. If the power is overloaded due to howling and other conditions, the overload current will directly enter the sound equipment. At this time, if the power exceeds the upper limit of the sound equipment, it will be directly damaged. In order to ensure the normal operation of the sound equipment, avoid damage caused by current overload, howling and other factors, important meetings and high-end places will be equipped with howling eliminator, equalizer and other protection devices. Some high-end power amplifiers even have overcurrent protection function, but these sound equipment with equalizer adjustment or direct use of self-overload protection has the disadvantages of large size, complex process, etc. Moreover, the sound equipment with overcurrent protection function is expensive and difficult to troubleshoot, which not only consumes personnel energy, but also increases the use cost, and the widespread application is limited. Therefore, it is necessary to improve. CONTENT OF THE UTILITY MODEL
[0003] The utility model solves the technical problem: provide a portable sound equipment overload protection box, the utility model aims at solving the problems of the sound equipment with equalizer adjustment or direct use of self-overload protection, such as large size, complex process.
[0004] In order to achieve the above purpose, the utility model adopts the technical scheme of:
[0005] The portable sound equipment overload protection box comprises a protection box body, and the protection box body is internally provided with a sound equipment overload protection circuit.
[0006] The sound equipment overload protection circuit comprises a boat-shaped switch K, a self-restoring fuse PT, an LED2 lamp, a knob type rheostat Rw, a resistor R1, a resistor R2 and an LED1 lamp. The input end of the boat-shaped switch K is connected with an audio power amplifier. The B end of the boat-shaped switch K is directly connected with a sound equipment input end through an L1 line. The A end of the boat-shaped switch K is connected with the sound equipment input end through an L2 line. The self-restoring fuse PT is connected in series on the L2 line. The LED2 lamp, the knob type rheostat Rw and the resistor R1 are connected in series and then connected in parallel with the self-restoring fuse PT. The resistor R2 and the LED1 lamp are connected in series. The resistor R2 is connected with the input end of the self-restoring fuse PT. The LED1 lamp is grounded.
[0007] Further, the input end of the sound overload protection circuit and the audio power amplifier are connected by a Neutrik head, and the output end of the sound overload protection circuit and the sound input end are also connected by a Neutrik head.
[0008] Further, the boat-shaped switch K, the LED2 lamp, the LED1 lamp and the knob resistor Rw are fixed on the outer shell wall of the protection box.
[0009] Further, the boat-shaped switch K is a boat-shaped single-blade double-branch switch.
[0010] Further, the protection box has an outer dimension of 10 cm x 8 cm x 3 cm.
[0011] Compared with the prior art, the utility model has the advantages that:
[0012] The utility model discloses an overload protection box device which is made of overload protection technology, and the combination of the self-recovery fuse and the several resistors can provide reliable overload protection for the sound equipment. BRIEF DESCRIPTION OF DRAWINGS
[0013] Figure 1 It is a circuit diagram of the utility model;
[0014] Figure 2 It is a structure front view of the utility model;
[0015] Figure 3 It is a structure left view of the utility model;
[0016] Figure 4 It is a structure top view of the utility model. DETAILED DESCRIPTION
[0017] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.
[0018] It is to be understood that the terms "including", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by an "including a" statement does not exclude the existence of additional identical elements in the process, method, article, or apparatus that includes the element.
[0019] Reference is made to Figures 1-4 for a detailed description of embodiments of the present application.
[0020] The portable sound overload protection box comprises a protection box body 1, and an audio overload protection circuit is arranged in the protection box body 1. Figure 1 As shown in the figure, the audio overload protection circuit comprises one boat-shaped switch K2, one self-recovery fuse PT5, one LED2 lamp 6, one knob-type rheostat Rw7, one resistor R18, one resistor R29, and one LED1 lamp 10; the input end of the boat-shaped switch K2 is connected with an audio power amplifier 11, the B end of the boat-shaped switch K2 is directly connected with the input end of a sound 12 through an L1 line 3; the A end of the boat-shaped switch K2 is connected with the input end of the sound 12 through an L2 line 4, the self-recovery fuse PT5 is connected in series on the L2 line 4, the LED2 lamp 6, the knob-type rheostat Rw7, and the resistor R18 are connected in series and then connected in parallel with the self-recovery fuse PT5; the resistor R29 and the LED1 lamp 10 are connected in series, the resistor R29 is connected with the input end of the self-recovery fuse PT5, and the LED1 lamp 10 is grounded.
[0021] In the circuit, the preferred parameter settings are as follows: self-recovery fuse PT: 1-3A (determined according to the power of the sound), resistor R1: 4.7KΩ2W, resistor R2: 2KΩ1W, knob-type rheostat RW: 100kΩ10W.
[0022] Preferably, the input end of the audio overload protection circuit and the output end of the audio overload protection circuit are both connected with the audio power amplifier 11 and the input end of the sound 12 through a Neutrik head 13.
[0023] Preferably, the boat-shaped switch K2 is a boat-shaped single-knife double-branch switch.
[0024] The above embodiment, LED1 lamp (green) for equipment start indicator, LED2 lamp (red) for overload alarm indicator, when the ship type single blade double branch switch K is placed in B end, the equipment is in the closed state, the audio signal directly enters the audio through L1 line, the protection circuit is disconnected and does not work; when the ship type single blade double branch switch K is placed in A end, LED1 lamp lights up, the equipment starts to work, the audio signal enters the audio through L2 line via self-resetting fuse PT, at this time, if howling or other conditions cause current overload, the self-resetting fuse PT melts down, L2 line is disconnected, the audio signal enters the audio through LED2 lamp, knob type rheostat RW and resistor R1, LED2 lamp lights up (overload alarm), at this time, because the knob type rheostat RW and the resistor R1 hinder most of the audio current, the current flowing into the audio is reduced, thus the audio is protected; when the audio current returns to normal, the self-resetting fuse PT recovers to conduction, the audio signal reenters the audio through L2 line, LED2 lamp is extinguished (alarm stops), and the audio resumes normal work. In addition, according to the audio carrying power and the on-site demand, the audio volume after the alarm can be adjusted by adjusting the knob type rheostat RW, which is convenient for on-site testing and maintenance (the red box is the claimed subject).
[0025] The circuit is connected between the audio power amplifier and the audio when in use, when the switch is closed, the audio signal is connected to the audio through the internal lead, the device does not work, when the switch is opened, the audio signal enters the audio through the self-resetting fuse, when the current exceeds the load, the fuse melts down, the alarm indicator lights up, the current flowing into the audio is reduced, when the current returns to normal, the fuse cools down and reconnects, the current flowing into the audio returns to normal, the alarm indicator is extinguished, and the audio works normally. The circuit can provide reliable overload protection for the audio, the device as a whole does not need additional power supply, has the characteristics of simple structure, small size and low cost, and is suitable for all audios, having a wide market space.
[0026] In a specific embodiment, as shown in Figures 2-4 The ship type switch K2, LED2 lamp 6, LED1 lamp 10, knob type rheostat Rw7 and Neutrik head 13 are fixed on the outer shell wall of the protection box body 1. In use, the power amplifier is connected to the Neutrik head input end, the audio is connected to the Neutrik head output end, the ship type switch K is turned on, LED1 (green) lights up, the device starts to work, when the power amplifier output power is overloaded, the self-resetting fuse PT overheats and melts down, LED2 (red) lights up, the device alarms, at this time, the audio volume can be adjusted through the knob type rheostat Rw, when the audio current returns to normal, the self-resetting fuse PT recovers to conduction, and the audio works normally.
[0027] In a specific embodiment, the size and internal structure of the overload protection box are as followsFigures 2-4 As shown, the protective box 1 has the size of 10cm*8cm*3cm, small volume, convenient to carry and use.
[0028] It is apparent for those skilled in the art that the present application is not limited to the details of the foregoing exemplary embodiments, and the present application can be implemented in other concrete forms without departing from the spirit or essential characteristics of the present application. Therefore, the foregoing embodiments should be considered in all aspects as illustrative and not restrictive, and the scope of the present application is defined by the appended claims rather than the foregoing description, and it is intended to embrace all changes falling within the meaning and range of equivalents of the claims. Any reference signs in the claims should not be construed as limiting the claims to which they belong.
[0029] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the specification is described in this way only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be properly combined to form other embodiments that those skilled in the art can understand.
Claims
1. A portable sound overload protection box, characterized by: Including protection box (1), the inside of protection box (1) is equipped with sound overload protection circuit; The sound overload protection circuit includes a boat switch K (2), a self-recovery fuse PT (5), an LED2 lamp (6), a knob resistor Rw (7), a resistor R1 (8), a resistor R2 (9), and an LED1 lamp (10). The input end of the boat switch K (2) is connected with an audio power amplifier (11). The B end of the boat switch K (2) is directly connected with the input end of a sound (12) through an L1 line (3). The A end of the boat switch K (2) is connected with the input end of the sound (12) through an L2 line (4). The self-recovery fuse PT (5) is connected in series on the L2 line (4). The LED2 lamp (6), the knob resistor Rw (7), and the resistor R1 (8) are connected in series and then connected in parallel with the self-recovery fuse PT (5). The resistor R2 (9) and the LED1 lamp (10) are connected in series. The resistor R2 (9) is connected with the input end of the self-recovery fuse PT (5). The LED1 lamp (10) is grounded. The input end of the sound overload protection circuit and the output end of the sound overload protection circuit are connected with the audio power amplifier (11) and the input end of the sound (12) through Neutrik heads (13).
2. The portable sound system overload protection box of claim 1, wherein: The boat switch K (2), the LED2 lamp (6), the LED1 lamp (10), and the knob resistor Rw (7) are fixed on the outer surface shell wall of the protection box (1).
3. The portable audio overload protection box of claim 1, wherein: The boat switch K (2) is a boat-shaped single-blade double-branch switch.
4. The portable audio overload protection box of claim 1, wherein: The length, width, and height of the protection box (1) are 10 cm, 8 cm, and 3 cm, respectively.