Vehicle door

The present invention relates to a vehicle door, which is installed on the vehicle. The door includes a shutter, a speaker and an inverted tube. The shutter has an accommodation cavity, and the speaker is installed in the shutter. The inverted tube is located in the accommodation cavity, with one end connected with the interior of the vehicle, and the other end forming an acoustic port with a flange. The inverted tube exports the sound from the rear cavity into the car. The inverted tube with the acoustic port can strengthen the resonance effect of the air, and strengthen the sound wave. It can improve the loudness of the speaker, reduce the noise of the airflow, and effectively improve the sound quality of the speaker.

FIELD OF THE PRESENT DISCLOSURE

The present invention relates to the technical field of vehicle-mounted speakers, in particular to a vehicle door incorporating a speaker.

DESCRIPTION OF RELATED ART

The vehicle speaker is usually installed on the vehicle door and is an important component of the vehicle audio equipment. When the speaker's sound membrane vibrates back and forth, it can push the air in front of and behind the speaker to vibrate, thereby producing sound. Usually, the rear end of the speaker is located inside the vehicle door, and the inside of the vehicle door is the sealed chamber. This part of the sound wave energy radiated by the speaker towards the rear is wasted, resulting in lower loudness and poor sound quality of the vehicle-mounted speaker.

SUMMARY OF THE PRESENT INVENTION

The main purpose of the present invention is to provide a vehicle door to solve the problem of low loudness and poor sound quality of the vehicle speaker.

Accordingly, the present invention provides a vehicle door, installed on a vehicle, including: a shutter having an accommodation cavity; a speaker engaging with the shutter, including a sound membrane facing an interior of the vehicle, and a rear cavity under the sound membrane communicating with the accommodation cavity; an inverted tube located in the accommodation cavity with one end thereof connected with the interior of the vehicle and another end formed with an acoustic port facing the speaker along a circumference of the inverted tube. The acoustic port has a flange. The inverted tube exports the sound from the rear cavity into the vehicle so that the sound from the rear cavity is superimposed with sound from a front side of the sound membrane.

In addition, the flange forms a sunken pit.

In addition, a plurality of the sunken pits is irregularly distributed on the flange.

In addition, a diameter D1 of the loudspeaker mouth is 150 mm˜300 mm.

In addition, a diameter D2 of the sunken pit is 2 mm˜5 mm.

In addition, the shutter includes an inverted hole, and the inverted tube has one end fixedly connected with the inverted hole; a distance L1 from the inverted hole to the speaker is 250 mm˜350 mm.

In addition, the inverted hole is a circle; and a diameter D3 of the inverted hole is 100 mm˜150 mm.

In addition, the inverted tube includes a main body and an installation part, and the main body is a straight-line shape, wave shape or arc shape, the acoustic port is located in the main body.

In addition, the minimum distance L2 from the inverted tube to the bottom wall of the accommodation cavity is 20 mm˜50 mm.

In addition, the vehicle door includes a noise reduction component in the inverted tube, wherein the noise reduction component is located at a middle part of the inverted tube, and is arranged along a radial direction of the inverted tube.

DETAILED DESCRIPTION OF THE EXEMPLARY EMBODIMENTS

It should be understood that the term “and/or” used in this document is only an association relationship to describe associated objects, indicating that there may be three kinds of relationships, for example, a and/or B, which may indicate: There are three cases where A exists alone, A and B exist at the same time, and B exists alone. In addition, the character “/” in this document generally indicates that the related objects are an “or” relationship.

It should be noted that the orientation words such as “up”, “down”, “left”, and “right” described by the embodiment of the present invention are described in the angle shown by the attached figures which should not be construed as a limitation on the embodiment of the present invention. Also, in this context, it should also be understood that when an element is referred to as being “on” or “under” another element, it can not only be directly connected “on” or “under” the other element, but also Indirectly connected “on” or “under” another element through middle elements.

The embodiment of the present invention provides a vehicle door, which is installed on a vehicle, as shown inFIG.1andFIG.2, the vehicle door includes a shutter2, a speaker2and an inverted tube3, wherein the shutter1is provided with an accommodation cavity11. The speaker2is attached to the shutter1. The speaker2includes a sound membrane21facing the interior of the vehicle and a rear cavity22located below the sound membrane21. The rear cavity22is connected with the accommodation cavity11, the inverted tube3is located in the accommodation cavity11, one end of the inverted tube3is connected with the interior of the vehicle, and the other end is provided with an acoustic port31facing the speaker2. Along the circumferential direction of the inverted tube3, the acoustic port31is provided with a flange311, and the size of the flange311gradually increases in the direction toward the speaker2. The inverted tube3exports the sound from rear cavity22into the vehicle so that the sound from rear cavity22is superimposed with the sound from the front side of sound membrane21.

In this embodiment, when the sound membrane21of the speaker2vibrates, the air in the rear cavity22below the sound membrane21will also vibrate. The rear cavity22is connected with the accommodation cavity11, so that the vibrating air flows into the accommodation cavity11. The inverted tube3can connect the accommodation cavity11and the inside of the vehicle, and utilize the vibration of the speaker2rear cavity22. The gas in the back of the speaker2is compressed by vibration to generate resonance and push the gas in the inverted tube3to resonate and move outward.

The sound wave behind the speaker2is superimposed with the sound wave in front of the speaker2, so as to strengthen the sound wave and improve the loudness of the speaker2. The end of the inverted tube3facing the speaker2is provided with a acoustic port, and the acoustic port31is a smooth curve structure. When the air behind the speaker2flows through the acoustic port31and enters the inverted tube3, the bending speed of the airflow can be reduced to avoid the occurrence of the sound of rapid airflow friction. Therefore, the noise of the airflow can be reduced, the sound purity can be improved, and the sound quality of the speaker2can be effectively improved.

Specifically, the acoustic port31is provided with a flange311extending outward, so that the diameter of the airflow inlet of the inverted tube3is larger than the tube diameter of the inverted tube3, and the resonant wave of the air is conducted through the acoustic port31into the inverted tube3. As the diameter of the airflow inlet gradually decreases, the resonance effect of the air is enhanced, and the gas in the accommodation cavity11promotes the gas in the inverted tube3, which makes the air resonance in the inverted tube3more intense. Thereby, the sound waves of the speaker2can be strengthened, and the loudness of the speaker2can be improved.

Wherein, the material of the inverted tube3can be metal, PVC, hard plastic or glass fiber, etc.; also, a reinforcing rib can be set on the outer wall of the inverted tube3to improve the strength of the inverted tube3and avoid the occurrence of the inverted tube3during the working process deformation, improve the working life of the inverted tube3.

In a specific embodiment, as shown inFIG.2andFIG.3, the flange311is provided with a sunken pit311a. In this embodiment, a sunken pit311ais installed on the inner wall of the acoustic port31.

Increase the viscosity of the airflow attached to the surface of the acoustic port31, reduce the air flow rate, in this way, the air in the inverted tube3can maintain or approach a laminar flow state, the resonance efficiency of inverted tube3and the sound quality of speaker2can be improved.

Specifically, as shown inFIG.2andFIG.3, multiple sunken pits311aare irregularly distributed on the flange311.

In this embodiment, a plurality of sunken pits311aare irregularly distributed along the circumferential direction of the flange311, and the spacing of the sunken pits311amay be the same or different. The multiple sunken pits311acan enhance the interference effect of the acoustic port31on the nearby air flow, so that the air entering the inverted tube3can maintain a laminar flow state as much as possible, thereby further improving the loudness and sound quality of the speaker2.

The diameters of the plurality of sunken pits311amay be the same or different. In a specific embodiment, as shown inFIG.2, the diameter D1 of the loudspeaker mouth31is 150 mm˜300 mm. For example, the diameter D1 of the loudspeaker mouth31may specifically be 150 mm, 200 mm, 250 mm, 300 mm and so on.

In this embodiment, when the diameter D3 of the acoustic port31is 150 mm˜300 mm, the inverted tube3is close to one end of the speaker2, that is, the cross-sectional area of the inlet of the inverted tube3is similar to the effective vibration area of the speaker2, which can effectively strengthen the air in the inverted tube3resonance effect. Thereby, the sound waves are strengthened and the loudness of the speaker2is improved.

In a specific embodiment, as shown inFIG.3, the diameter D2 of the sunken pit311ais 2 mm˜5 mm. For example, the diameter D2 of the sunken pit311amay specifically be 2 mm, 3 mm, 4 mm, 5 mm and so on.

In this embodiment, when the diameter D2 of the sunken pit311ais too small (for example, less than 2 mm), the requirements for process accuracy are high, the processing difficulty is too large, and it is inconvenient to manufacture, which increases the production cost of the inverted tube3. When the diameter D2 of the sunken pit311ais too large (for example, larger than 5 mm), the structural strength of the acoustic port31will be affected, and the working life of the inverted tube3will be reduced. Therefore, when the diameter D2 of the sunken pit311ais 2 mm˜5 mm, the strength of the inverted tube3can be ensured and the production cost of the inverted tube3can be saved.

In a specific embodiment, as shown inFIG.1, the shutter1is provided with an inverted hole12, the end of the inverted tube3away from the speaker2is fixedly connected to the inverted hole12, and the distance L1 from the inverted hole12to the speaker2is 250 mm˜350 mm. For example, the distance L1 from the inverted hole12to the speaker2may specifically be 250 mm, 280 mm, 310 mm, 350 mm, and so on.

In this embodiment, one end of the inverted tube3is connected to the inverted hole12, and the other end is close to the back of the speaker2. Therefore, the distance L1 from the inverted hole12to the speaker2determines the length of the inverted tube3. When the distance L1 from the inverted hole12to the speaker2is too small (for example, less than 250 mm), the space is too small, and it is inconvenient to set the inverted tube3. When the distance L1 from the inverted hole12to the speaker2is too large (for example, greater than 350 mm), the length of the inverted tube3is too large, resulting in the inverted tube3taking up too much space, which will affect the settings of other components in the accommodation cavity11. Therefore, when the distance L1 from the inverted hole12to the speaker2is 250 mm˜350 mm, the space occupied by the inverted tube3can be saved, and the placement of the inverted tube3can be facilitated.

Wherein, the inverted hole12and the inverted tube3can be fixedly connected by means of bonding or welding. In a specific embodiment, as shown inFIG.4, the inverted hole12is a circular hole, and the diameter D3 of the inverted hole12is 100 mm˜150 mm. For example, the diameter D3 of the inverted hole12may specifically be 100 mm, 120 mm, 130 mm, 150 mm and so on.

In this embodiment, since the inverted tube3is connected to the inverted hole12, the diameter D3 of the inverted hole12determines the cross-sectional area of the inverted tube3. When the diameter D3 of the inverted hole12is too small (for example, less than 100 mm), the cross-sectional area of the inverted tube3is too small, which affects the vibration effect of the air in the inverted tube3, resulting in a low loudness of the speaker2. When the diameter D3 of the inverted hole12is too large (for example, greater than 150 mm), the cross-sectional area of the inverted tube3is too large. In order to ensure that the resonant frequency of the inverted tube3is the same as that of the speaker2, the inverted tube3needs a longer length. As a result, the space occupied by the inverted tube3increases. Therefore, when the diameter D3 of the inverted hole12is 100 mm˜150 mm, the loudness of the speaker2can be improved, and the space occupied by the inverted tube3can be saved.

The shape of the inverted hole12will not cause adverse effects on the sound. Therefore, as shown inFIG.1, the inverted hole12may also be a square hole, a diamond hole, or an oval hole.

In a specific embodiment, as shown inFIG.5, the inverted tube3includes a main body33and an installation part34, the main body33is a straight-line shape, a wave shape or an arc shape, and the acoustic port31is located in the main body33.

In this embodiment, the installation part34is used to connect the inverted hole12and the main body33, so that the air in the main body33flows into the vehicle. Wherein, the shape of the main body33will not adversely affect the transmission of sound waves. Therefore, the main body33can be set in various shapes according to the space size of the accommodation cavity11and the specific use environment. As shown in the embodiment ofFIG.5, the main body33is a straight-line shape, and can also be a wave shape or an irregular arc shape.

Wherein, the main body33and the installation part34may be an integral structure of injection molding, or may be a split structure connected by bonding, welding or threading, which can reduce the volume of the mold and facilitate manufacturing.

In a specific embodiment, the minimum distance L2 from the inverted tube3to the bottom wall of the accommodation cavity11is 20 mm˜50 mm. For example, the minimum distance L2 from the inverted tube3to the bottom wall of the accommodation cavity11may specifically be 20 mm, 30 mm, 40 mm, 50 mm and so on.

In this embodiment, when the minimum distance L2 from the inverted tube3to the bottom wall of the accommodation cavity11is too small (for example, less than 20 mm), the installation of the inverted tube3is difficult, and it is easy to rub against the bottom wall of the accommodation cavity11, resulting in damage to the inverted tube3. Therefore, when the minimum distance L2 from the inverted tube3to the bottom wall of the accommodation cavity11is 20 mm˜50 mm, it can provide enough space for the installation of the inverted tube3, and at the same time, it can minimize the volume of the accommodation cavity11and save space.

In a specific embodiment, as shown inFIG.2, a noise reduction component32is arranged in the inverted tube3, and the noise reduction component32is located at the middle part of the inverted tube3and is arranged along the radial direction of the inverted tube3.

In this embodiment, the noise reduction component32is arranged with the function of sound absorption and noise reduction, which can play a secondary noise reduction effect on the airflow entering the inverted tube3, further reducing the noise of the airflow, thereby improving the sound purity and further improving the sound quality of speaker2.

The noise reduction component32may be a sound-absorbing cloth or a sound-absorbing board, wherein the sound-absorbing cloth is arranged with good air permeability and low price, and the air permeability can reach 70%, which can ensure the normal operation of the inverted tube3.