Reversing horn

Abstract

The reversing horn comprises a horn body (3), the horn body (3) is installed in a horn inner shell (2), the horn inner shell (2) is installed in a horn outer shell (1), a waterproof sound amplifying cover (1.3) with the opening end facing the horn body (3) is installed in the horn outer shell (1), and a horn sound amplifying opening (2.1) of the horn inner shell (2) is inserted into the waterproof sound amplifying cover (1.3). A rear cover (4) is installed on the tail portion of the loudspeaker outer shell (1), and the loudspeaker body (3) is contained in a sealing cylinder (4.3), inserted into the loudspeaker outer shell (1), on the rear cover (4). According to the reversing horn provided by the utility model, the perfect solution of waterproof and sound amplification effects is realized in a compact structural design through a brand new design.

Description

TECHNICAL FIELD

[0001] The utility model relates to a reversing horn, and particularly relates to a reversing horn applied to engineering vehicles and belonging to the technical field of vehicle electrical appliances. BACKGROUND

[0002] At present, the reversing horn is one of the necessary devices on the engineering vehicle, and the conventional reversing horn lacks the volume adjustment function. Therefore, the Chinese patent CN206585757U discloses a miniaturized reversing horn, which adjusts the input current size by installing the circuit board in the shell, thereby realizing the regulation of the volume. However, the reversing horn lacks the effective sealing and waterproof structure, and the simple resonant cavity formed between the shell and the buzzer piece cannot effectively amplify the sound. Therefore, the Chinese patent CN205622846U discloses a new type of voice reversing horn with improved structure, which realizes the partial waterproof function by increasing the rainproof structure. However, the performance is general. Therefore, there is an urgent need for a reversing horn with compact structure, excellent sealing and waterproof performance, and good sound amplification effect. SUMMARY

[0003] The utility model aims at overcoming the above-mentioned defects, and provides a reversing horn, which realizes the perfect solution of waterproofing and sound amplification in the compact structure design through a brand-new design.

[0004] The utility model aims at overcoming the above-mentioned defects, and provides a reversing horn, which realizes the perfect solution of waterproofing and sound amplification in the compact structure design through a brand-new design.

[0005] The utility model discloses a reversing horn, which comprises a horn body, a horn inner shell, a horn outer shell and a waterproof sound amplifier cover.

[0006] Preferably, an annular mounting ring is arranged on the inner wall of the horn outer shell, and the horn inner shell is mounted on the mounting ring.

[0007] Preferably, the waist part of the horn sound amplification port is inwardly contracted, so that the horn sound amplification port forms two resonant cavities with conical structures.

[0008] Preferably, an annular gap is formed between the outer wall of the sealing cylinder and the inner wall of the horn inner shell, and the annular gap constitutes a first air cavity. A gas permeable part is mounted on the wall of the sealing cylinder, and the inner cavity of the sealing cylinder is in communication with the first air cavity through the gas permeable part.

[0009] Preferably, the bottom of the horn inner shell is outwardly folded with a folded edge with an annular structure, and the end face of the folded edge abuts against the inner wall of the horn outer shell. The mounting ring, the outer wall of the horn inner shell and the folded edge surround to form a second air cavity with an annular structure.

[0010] Compared with the prior art, the utility model has the advantages that:

[0011] The front end of the loudspeaker body realizes two-stage waterproof through the waterproof sound amplification cover and the loudspeaker sound amplification port inserted in the waterproof sound amplification cover, avoids rainwater from entering the loudspeaker body in the inner shell of the loudspeaker, the rear end of the loudspeaker body is sealed in the rear cover, and secondary sealing is formed between the rear cover and the outer shell of the loudspeaker, so that the sealing effect is ensured.

[0012] The volume emitted by the loudspeaker body realizes multi-stage resonance sound amplification under the compact small size through the four resonance cavities designed to turn back, and the volume is ensured.

[0013] Finally, the air permeable part ensures that the loudspeaker body is in the normal pressure state during work, and the sound emitting effect is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a structure schematic view of the reverse travel loudspeaker of the utility model.

[0015] Figure 2 It is a sectional view of the reverse travel loudspeaker of the utility model.

[0016] Figure 3 It is a structure schematic view of the reverse travel loudspeaker of the utility model. Figure 2 It is a local enlarged view of the reverse travel loudspeaker.

[0017] Figure 4 It is a structure schematic view of the outer shell of the loudspeaker of the reverse travel loudspeaker of the utility model.

[0018] Figure 5 It is a structure schematic view of the inner shell of the loudspeaker of the reverse travel loudspeaker of the utility model.

[0019] Figure 6 It is a sound wave conduction schematic view when the reverse travel loudspeaker of the utility model works.

[0020] Among them:

[0021] The outer shell of the loudspeaker 1, the inner shell of the loudspeaker 2, the loudspeaker body 3, the rear cover 4, the circuit board 5, the air permeable part 6;

[0022] The mounting plate 1.1, the mounting ring 1.2, the waterproof sound amplification cover 1.3, the front positioning stopper 1.4, the rear positioning stopper 1.5;

[0023] The loudspeaker sound amplification port 2.1, the turned edge 2.2;

[0024] The wiring hole 4.1, the indicator lamp hole 4.2, the sealing cylinder 4.3, the process hole 4.4;

[0025] The indicator lamp 5.1. DETAILED DESCRIPTION

[0026] Referring to Figures 1-6 The utility model relates to a kind of reversing horn, including horn outer casing 1, installation plate 1.1 is provided on the outer wall of horn outer casing 1, the utility model reversing horn is installed on vehicle by installation plate 1.1, annular structure installation ring 1.2 is provided on the inner wall of horn outer casing 1, installation ring 1.2 divides horn outer casing 1 into two sections, front section is the sound cavity of the cone cylinder structure of big aperture opening end, rear section is the installation cavity for installing horn body 3;

[0027] Waterproof sound amplifier cover 1.3 is horizontally buckled in sound cavity, and the bottom part of waterproof sound amplifier cover 1.3 is connected on the inner wall of horn outer casing 1, so that waterproof sound amplifier cover 1.3 is suspended in horn outer casing 1, and the waterproof sound amplifier cover 1.3 of reverse buckle also avoids the entry of rainwater.

[0028] Annular structure front positioning stopper 1.4 is provided on the end face of installation ring 1.2 towards installation cavity, horn inner casing 2 is clamped on front positioning stopper 1.4, horn inner casing 2 front section protruding horn sound port 2.1 extends to the sound cavity of horn outer casing 1, and is inserted in waterproof sound amplifier cover 1.3 (the cooperation of horn sound port 2.1 and waterproof sound amplifier cover 1.3 also further avoids rainwater to contact internal horn body 3), and the waist of horn sound port 2.1 is inwards contracted, so that horn sound port 2.1 forms two conical structure resonance cavities one and two (S1, S2), simultaneously, the outer wall of horn sound port 2.1 and the inner wall of waterproof sound amplifier cover 1.3 form resonance cavity three S3, the outer wall of waterproof sound amplifier cover 1.3 and the inner wall of the sound cavity of the cone cylinder structure of horn outer casing 1 form resonance cavity four S4.

[0029] Horn body 3 is installed in horn inner casing 2, rear cover 4 is installed on horn outer casing 1 by cooperation with rear positioning stopper 1.5, and the sealing cylinder 4.3 connected on rear cover 4 extends to the installation cavity of horn outer casing 1, after the top of sealing cylinder 4.3 and horn body 3, the inside between horn body 3 and horn inner casing 2 are sealed by filling glue, annular gap formed between the outer wall of sealing cylinder 4.3 and the inner wall of horn inner casing 2 constitutes air cavity one Q1, simultaneously, air permeable component 6 is installed on the cylinder wall of sealing cylinder 4.3 (air permeable component 6 can be air-permeable water-proof membrane made of high molecular material, or can be air-permeable membrane flap made of flexible material, or be a group of two opposite one-way air valves, or be air valve, pressure valve etc.), so that working cavity W1 formed by rear cover 4, sealing cylinder 4.3 and horn body 3 is communicated with air cavity one Q1 by air permeable component 6.

[0030] Meanwhile, the bottom of the horn inner casing 2 is outwardly folded with a ring-shaped structure flange 2.2, and the end face of the flange 2.2 abuts against the inner wall of the horn outer casing 1, so that the mounting ring 1.2, the outer wall of the horn inner casing 2 and the flange 2.2 enclose a ring-shaped structure air cavity two Q2. There is a certain air gap between the flange 2.2 and the inner wall of the horn outer casing 1, so that the air cavity two Q2 and the air cavity one Q1 are also in communication, and the air cavity one Q1 can be supplemented through the air cavity two Q2.

[0031] Moreover, the circuit board 5 is fixedly installed in the rear cover 4, the indicator lamp 5.1 on the circuit board 5 passes through the indicator lamp hole 4.2 on the rear cover 4, the wire harness (power supply wire and control wire) connecting the circuit board 5 passes through the wire hole 4.1 on the rear cover 4, and the circuit board 5 is sealed and cast in the rear cover 4 by epoxy resin, and the sealing layer of the epoxy resin sealing pours seals the wire hole 4.1 and the indicator lamp hole 4.2 at the same time.

[0032] The assembling process of the reverse horn is as follows:

[0033] Firstly, the horn body 3 is fixedly and sealingly installed in the horn inner casing 2 by the glue pouring mode, and the circuit board 5 is fixedly and sealingly installed in the rear cover 4 by the glue pouring mode, then the lead wire passing through the glue layer of the circuit board 5 is connected with the horn body 3, then the sealing cylinder 4.3 of the rear cover 4 and the inner wall of the horn inner casing 2 are sealingly connected by the glue pouring mode to form a semi-finished product, finally, the semi-finished product is installed in the horn outer casing 1, so that the whole assembling process is completed; the process hole 4.4 can play a role in exhausting in the process of glue pouring sealing, so that the buzzer sheet of the horn body 3 is prevented from being pressed under the positive pressure state of the glue pouring, and the process hole 4.4 is sealed after the glue pouring is completed. The sealing performance is realized through the above multi-stage glue pouring sealing, and the secondary isolation is realized through the structural design of the sealing cylinder 4.3, so that the waterproof sealing performance is ensured.

[0034] When the reverse horn works:

[0035] The volume of the horn body 3 is sequentially amplified through the resonance cavities one S1 and two S2, is reflected through the waterproof sound amplifier cover 1.3, enters the resonance cavity three S3 of the ring structure, is turned again through the resonance cavity four S4, and the multi-stage resonance cavities are realized through the back-and-forth design structure, so that the volume is greatly reduced, and the resonance sound amplification effect is improved.

[0036] At the same time, when the horn body 3 is heated too much due to long time work, the gas in the working cavity W1 will expand due to heat, so that the pressure of the working cavity W1 increases, thereby extruding the buzzer sheet of the horn body 3, affecting the sound effect. Therefore, in the patent, when the pressure in the working cavity W1 increases, the gas will enter the air cavity Q1 through the air permeable component 6 to release pressure. When the horn body 3 stops working and the temperature drops, the pressure in the working cavity W1 decreases, and the gas will flow back to the working cavity W1 from the air cavity Q1 through the air permeable component 6, thereby ensuring that the working cavity W1 is stable in a constant pressure state. In order to ensure the reliability of pressure relief, the air cavity Q2 is designed to serve as a backup, further ensuring the constant pressure state of the working cavity W1.

[0037] In addition: It should be noted that the above specific embodiments are only one optimization scheme of the patent, and any changes or improvements made by those skilled in the art based on the above concept are within the protection scope of the patent.

Claims

1. A reversing horn comprising a horn body (3), characterized in that: The loudspeaker body (3) is installed in the loudspeaker inner casing (2), the loudspeaker inner casing (2) is installed in the loudspeaker outer casing (1), and the waterproof sound amplifier cover (1.3) with an open end facing the loudspeaker body (3) is installed in the loudspeaker outer casing (1), the loudspeaker sound amplifying port (2.1) of the loudspeaker inner casing (2) is inserted into the waterproof sound amplifier cover (1.3), and the tail of the loudspeaker outer casing (1) is provided with the rear cover (4), and the sealing cylinder (4.3) inserted into the loudspeaker outer casing (1) on the rear cover (4) contains the loudspeaker body (3).

2. The reverse horn of claim 1, wherein: An annular mounting ring (1.2) is arranged on the inner wall of the loudspeaker outer casing (1), and the loudspeaker inner casing (2) is mounted on the mounting ring (1.2).

3. The reverse horn of claim 1 wherein: The waist of the loudspeaker sound amplifying port (2.1) is inwardly contracted, so that the loudspeaker sound amplifying port (2.1) forms two resonant cavities with a conical structure.

4. The reverse horn of claim 1 wherein: An annular gap is formed between the outer wall of the sealing cylinder (4.3) and the inner wall of the loudspeaker inner casing (2), which constitutes a first air cavity (Q1), a gas permeable component (6) is mounted on the wall of the sealing cylinder (4.3), and the inner cavity of the sealing cylinder (4.3) is connected with the first air cavity (Q1) through the gas permeable component (6).

5. The reverse horn of claim 1 wherein: The bottom of the loudspeaker inner casing (2) is outwardly folded with a ring-shaped folded edge (2.2), and the end surface of the folded edge (2.2) abuts against the inner wall of the loudspeaker outer casing (1), and the mounting ring (1.2), the outer wall of the loudspeaker inner casing (2) and the folded edge (2.2) form a ring-shaped second air cavity (Q2).

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