Pedestrian warning device for trolley buses

Abstract

The utility model discloses a kind of pedestrian warning devices for tram, including shell, bottom cover and loudspeaker, bottom cover is detachably connected on the open bottom of shell, loudspeaker is set on the inner surface of bottom cover, bottom cover is equipped with sound hole, loudspeaker's loudspeaker mouth is aligned with sound hole, sealing rubber ring is equipped between loudspeaker mouth and bottom cover, water baffle is equipped in sound hole;A kind of pedestrian warning device for tram of the utility model, water baffle on sound hole forms water barrier structure, prevent splashed rainwater directly into shell interior, then through the tympanic membrane of loudspeaker and sealing rubber ring to form closed structure, reduce water vapor to enter shell interior, thereby reduce the water risk of pedestrian warning device for tram, with good waterproof property while ventilating, make the service life of pedestrian warning device for tram longer.

Description

Technical Field

[0001] This utility model relates to a pedestrian warning device for trams. Background Technology

[0002] For new energy vehicles such as battery-powered electric vehicles, it is necessary to equip them with pedestrian warning devices that emit a warning sound to alert pedestrians of the presence or approach of the vehicle, especially when the vehicle is traveling at low speed.

[0003] Pedestrian warning devices are typically installed on the exterior of vehicles, operating outdoors, and are therefore inevitably exposed to moisture (such as rain). Existing tram pedestrian warning devices require a dry interior and lack waterproofing, allowing splashed rainwater to enter and shorten their lifespan. Summary of the Invention

[0004] The purpose of this utility model is to provide a pedestrian warning device for trams, including a housing, a bottom cover, a speaker, and a main board. The main board is disposed inside the housing, the bottom cover is detachably connected to the open bottom of the housing, the speaker is disposed on the inner surface of the bottom cover, the speaker is connected to the main board via a wire, the bottom cover is provided with a sound outlet, the speaker outlet is aligned with the sound outlet, a sealing ring is provided between the speaker outlet and the bottom cover, and a water-proof grid is provided inside the sound outlet.

[0005] Preferably, the water-proof grid plate includes a mounting circular frame, which has an outer grid layer, an inner grid layer and several support plates. The grid bars of the outer grid layer have a first air-permeable gap for airflow to pass through, and the grid bars of the inner grid layer have a second air-permeable gap for airflow to pass through. The first air-permeable gap and the second air-permeable gap are staggered. The several support plates are cross-connected to the outer grid layer and the inner grid layer respectively.

[0006] Preferably, the outer edge of the bottom cover is provided with a slot, and the housing is provided with an outwardly extending latch, which engages in the corresponding slot, so that the bottom cover and the housing are connected by a latching structure.

[0007] Preferably, the speaker's sound outlet is provided with a waterproof and breathable membrane.

[0008] Preferably, the sound outlet is a stepped hole, the water-proof grid plate is embedded on the stepped surface of the stepped hole, and an adhesive layer is provided between the water-proof grid plate and the sound outlet.

[0009] Preferably, the shell is provided with a drainage slope, and the shell as a whole is triangular.

[0010] Preferably, the housing is provided with an insertion port, and the edge of the insertion port is provided with a protective baffle.

[0011] The advantages and beneficial effects of this utility model are as follows: It provides a pedestrian warning device for trams, which forms a water-proof structure by forming a water-proof grid on the sound outlet to prevent splashed rainwater from directly entering the housing. Furthermore, the diaphragm of the speaker and the sealing ring form a closed structure to reduce the entry of moisture into the housing, thereby reducing the risk of water ingress into the pedestrian warning device for trams. It is breathable while having good waterproof properties, which makes the pedestrian warning device for trams have a longer service life. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the present invention.

[0013] Figure 2 This is a cross-sectional schematic diagram of the present invention.

[0014] Figure 3 This is a partially disassembled schematic diagram of this utility model.

[0015] Figure 4 This is an enlarged schematic diagram of the water-blocking grid plate in this utility model. Detailed Implementation

[0016] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solution of this utility model and should not be construed as limiting the scope of protection of this utility model.

[0017] The specific technical solution of this utility model is as follows: like Figure 1 and Figure 2 As shown, a pedestrian warning device for trams includes a housing 1, a bottom cover 2, a speaker 4, and a main board 5. The main board 5 is disposed inside the housing 1. The bottom cover 2 is detachably connected to the open bottom of the housing 1. The speaker 4 is disposed on the inner surface of the bottom cover 2. The speaker 4 is connected to the main board via a wire 51. The bottom cover 2 is provided with a sound outlet 7. The speaker port of the speaker 4 is aligned with the sound outlet 7. A sealing ring 6 is provided between the speaker port and the bottom cover. A water-proof grid plate 3 is provided inside the sound outlet 7.

[0018] The outer edge of the bottom cover 2 is provided with a slot 21, and the housing 1 is provided with an outwardly extending latch 22. The latch 22 is engaged in the corresponding slot 21, so that the bottom cover 2 and the housing 1 are connected by a latching structure. Specifically, the bottom cover 2 and the housing 1 are connected by a latching structure, so that the components inside the tram pedestrian warning device can be replaced and repaired.

[0019] like Figure 3 and Figure 4As shown, the aforementioned water-proof grid plate 3 includes a mounting circular frame 31. The mounting circular frame 31 is provided with an outer grid layer 32, an inner grid layer 33, and several support plates 34. A first air-permeable gap is left between the grid bars of the outer grid layer 32 to allow airflow, and a second air-permeable gap is left between the grid bars of the inner grid layer 33 to allow airflow. The first air-permeable gap and the second air-permeable gap are staggered. The several support plates 34 are horizontally crisscrossed and fixedly connected to the outer grid layer 32 and the inner grid layer 33 respectively. Specifically, the grid bars of the outer grid layer 32 form a first air-permeable gap to allow airflow, which is blocked by the vertically staggered grid bars of the inner grid layer 33. The grid bars of the inner grid layer 33 form a second air-permeable gap to allow airflow, which is blocked by the vertically staggered grid bars of the outer grid layer 32, thereby forming a water-proof grid plate 3 that can prevent water from passing through without blocking airflow.

[0020] The aforementioned sound outlet 7 is a stepped hole, and the water-proof grid plate 3 is embedded in the stepped surface of the stepped hole 7. An adhesive layer is provided between the water-proof grid plate 3 and the sound outlet 7; specifically, the water-proof grid plate 3 is fixed to the stepped surface of the sound outlet 7 by the adhesive layer. The aforementioned housing 1 is provided with a drainage slope 8, and the housing 1 is in the shape of a triangular prism; specifically, the drainage slope 8 can prevent water from accumulating on the housing 1.

[0021] The aforementioned housing 1 is provided with an insertion port 9, and the edge of the insertion port 9 is provided with a protective baffle 91; specifically, the protective baffle 91 prevents water from entering the interior of the insertion port 9.

[0022] When the vehicle is driving in a humid outdoor environment (such as rain), the outer grid layer 32 forms a first ventilation gap for airflow, which is blocked by the vertically staggered grid of the inner grid layer 33; the inner grid layer 33 forms a second ventilation gap for airflow, which is blocked by the vertically staggered grid of the outer grid layer 32, thus forming a water-proof structure that can block water but does not block airflow, preventing splashed rainwater from directly entering the interior of the housing 1; Then, the speaker mask of the speaker 4 is placed on the sound outlet 7. Since the speaker 4 is fixed on the inner surface of the bottom cover 2, the sealing ring 6 and the diaphragm 41 inside the speaker 4 form a closed structure, reducing the entry of water vapor into the housing 1, thereby reducing the risk of water ingress of the tram pedestrian warning device. It has good waterproof performance while being breathable, which makes the tram pedestrian warning device have a longer service life.

[0023] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A pedestrian warning device for trams, comprising a housing, a bottom cover, a speaker, and a main board, characterized in that: The motherboard is housed inside the housing, the bottom cover is detachably connected to the open bottom of the housing, the speaker is housed on the inner surface of the bottom cover, the speaker is connected to the motherboard via a wire, the bottom cover has a sound outlet, the speaker's sound outlet is aligned with the sound outlet, a sealing ring is provided between the sound outlet and the bottom cover, and a water-proof grid is provided inside the sound outlet.

2. A pedestrian warning device for trams according to claim 1, characterized in that, The water-proof grid plate includes a mounting circular frame, which contains an outer grid layer, an inner grid layer, and several support plates. A first air-permeable gap is left between the grid bars of the outer grid layer to allow airflow, and a second air-permeable gap is left between the grid bars of the inner grid layer to allow airflow. The first air-permeable gap and the second air-permeable gap are staggered. The several support plates are cross-connected to the outer grid layer and the inner grid layer respectively.

3. A pedestrian warning device for trams according to claim 2, characterized in that, The outer edge of the bottom cover is provided with a slot, and the housing is provided with an outwardly extending latch, which engages in the corresponding slot.

4. A pedestrian warning device for trams according to claim 3, characterized in that, The sound outlet is a stepped hole, and the water-proof grid plate is embedded on the stepped surface of the stepped hole. An adhesive layer is provided between the water-proof grid plate and the sound outlet.

5. A pedestrian warning device for trams according to claim 4, characterized in that, The shell is provided with a drainage slope, and the shell as a whole is triangular.

6. A pedestrian warning device for trams according to claim 5, characterized in that, The housing is provided with an insertion port, and the edge of the insertion port is provided with a protective baffle.

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