Vehicle-mounted subwoofer

Abstract

The utility model discloses a vehicle-mounted subwoofer, which comprises a vehicle-mounted subwoofer shell, the vehicle-mounted subwoofer shell comprises an upper shell and a lower shell, and the upper shell and the lower shell form a closed space; a bass loudspeaker and a passive radiator are arranged on the upper shell, the passive radiator can simultaneously produce sound along with the vibration of the bass loudspeaker, and a piston device capable of moving up and down is arranged in the vehicle-mounted subwoofer shell; when the internal air pressure of the vehicle-mounted subwoofer shell changes, the piston device generates vibration in the same direction as the woofer, so that the air pressure difference between the interior and the exterior of the vehicle-mounted subwoofer shell is compensated, and the air pressure resistance is reduced. The vehicle-mounted subwoofer is reasonable in structural design, the bass effect of the subwoofer can be improved, the low-frequency diving depth is larger, the sound is firm and strong in hearing feeling, and the size of the vehicle-mounted subwoofer can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of loudspeakers, in particular to a vehicle-mounted subwoofer. Background Art

[0002] In recent years, with the continuous development of the automotive industry, people's requirements for vehicle-mounted intelligence and entertainment functions have become increasingly higher, and their requirements for the car cabin audio and video experience have also become increasingly higher, including the sense of technology, interior texture, sound quality, listening experience, sense of privacy, etc.

[0003] The sound quality of car speakers, especially car subwoofers, is closely related to the frame structure material and volume of the speakers. Because car components are subject to automotive regulations, there are more stringent design requirements.

[0004] Common car subwoofers include a car subwoofer housing and a woofer speaker arranged on the car subwoofer housing. The car subwoofer housing is a sealed box, which is generally composed of an upper and lower shell. The material is generally plastic material and the volume is generally large.

[0005] This closed cavity design structure is relatively simple, but the woofer has low efficiency, is relatively large in size, the bass dive is not deep enough, and the experience is not shocking enough. Utility Model Content

[0006] The purpose of the present invention is to provide a car-mounted subwoofer to solve the technical problems in the prior art of low working efficiency, large size, insufficient bass diving depth, and insufficient shocking experience of the woofer.

[0007] In order to achieve the above-mentioned purpose, the technical solution of the present invention provides a vehicle-mounted subwoofer, including a vehicle-mounted subwoofer shell, the vehicle-mounted subwoofer shell including an upper shell and a lower shell, the upper shell and the lower shell forming a closed space; the upper shell is provided with a woofer and a passive radiator, the passive radiator can make sound simultaneously with the vibration of the woofer, and the interior of the vehicle-mounted subwoofer shell is provided with a piston device that can move up and down; when the internal air pressure of the vehicle-mounted subwoofer shell changes, the piston device will generate vibration in the same direction as the woofer, thereby compensating for the air pressure difference inside and outside the vehicle-mounted subwoofer shell to reduce air pressure resistance.

[0008] Furthermore, the piston device includes a partition. When the internal air pressure of the vehicle subwoofer housing changes, the lower cavity and the upper cavity of the partition will also generate a driving force to make the partition vibrate in the same direction as the woofer.

[0009] Furthermore, the piston device further comprises a spring device, which is connected to the partition and can give the partition an upward elastic force.

[0010] Furthermore, when the air pressure in the cavity above the partition is at standard atmospheric pressure, the partition forms a vertical force balance under the action of atmospheric pressure, elastic force and gravity.

[0011] Furthermore, two spring devices are provided between the partition and the lower shell, and the two spring devices are distributed left and right and fixed on the lower shell.

[0012] Furthermore, the passive radiator is in a racetrack shape, a circular shape, or an elliptical shape.

[0013] Furthermore, the passive radiator includes a supporting bracket, a suspension assembly, and a counterweight block connected in sequence from the outside to the inside, and the covering rubber surface is bonded together with the counterweight block and the suspension assembly by glue; the supporting bracket is connected to the vehicle-mounted subwoofer housing, the suspension assembly adopts a concave pattern design, and the counterweight block provides vibration mass.

[0014] As a preferred embodiment, two passive radiators are provided on the upper shell, and the two passive radiators are respectively arranged on the left and right sides of the woofer.

[0015] As another preferred embodiment, the side wall of the vehicle subwoofer housing is provided with two passive radiators, and the two passive radiators are respectively arranged on the left and right side walls of the vehicle subwoofer housing; the woofer is a dual voice coil 2Ω woofer.

[0016] Furthermore, the upper shell and the lower shell are respectively a plastic upper shell and a plastic lower shell, and the upper shell and the lower shell are ultrasonically welded together to form a closed space.

[0017] In summary, the technical solution of the present invention has the following beneficial effects: the present invention has a reasonable structural design, including a vehicle-mounted subwoofer housing, the vehicle-mounted subwoofer housing including an upper housing and a lower housing, the upper housing and the lower housing forming a sealed space; the upper housing is provided with a woofer and a passive radiator, the passive radiator can emit sound simultaneously with the vibration of the woofer; the interior of the vehicle-mounted subwoofer housing is provided with a piston device that can move up and down; when the internal air pressure of the vehicle-mounted subwoofer housing changes, the piston device will vibrate in the same direction as the woofer, thereby compensating for the air pressure difference between the inside and outside of the vehicle-mounted subwoofer housing and reducing the air pressure resistance. This can increase the vibration displacement of the passive radiator and improve working efficiency. When the woofer is working, the air volume inside the vehicle-mounted subwoofer housing is compressed to a greater extent, thereby driving the passive radiator to move and produce a corresponding low-frequency response with the vehicle-mounted subwoofer housing, thereby increasing the bass effect of the subwoofer, making the low-frequency dive deeper, and making the sound sound solid and powerful, while reducing the size of the vehicle-mounted subwoofer. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the three-dimensional structure of the lower shell of the utility model;

[0020] Figure 3 This is a schematic diagram of the three-dimensional structure of the upper shell of the utility model;

[0021] Figure 4 This is a schematic diagram of the three-dimensional structure of the passive radiator of the utility model;

[0022] Figure 5 This is a schematic structural diagram of Example 1 of the present utility model;

[0023] Figure 6 This is a schematic structural diagram of Example 2 of the present utility model;

[0024] Explanation of the reference numerals: 1-car subwoofer housing, 2-woofer, 3-passive radiator, 4-piston device; 101-upper shell, 102-lower shell; 301-support bracket, 302-suspension assembly, 303-counterweight, 304-covering rubber surface; 401-partition, 402-spring device. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention, but this does not constitute a limitation on the protection scope of the present invention.

[0026] In this utility model, for a clearer description, the following explanation is made: the observer faces the Figure 1 For observation, the left side of the observer is set as left, the right side of the observer is set as right, the front of the observer is set as front, the rear of the observer is set as rear, the top of the observer is set as top, and the bottom of the observer is set as bottom. It should be noted that the terms "front end", "rear end", "left side", "right side", "middle", "top", "bottom" and so on in the text indicate the direction or position relationship based on the direction or position relationship set in the accompanying drawings. They are only for the convenience of clearly describing the present invention, and do not indicate or imply that the structure or component referred to must have a specific direction or be constructed in a specific direction. Therefore, they cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", and "fourth" are only used for the purpose of clarifying or simplifying the description, and cannot be understood as indicating or implying relative importance or quantity.

[0027] See also Figures 1 to 6 The present embodiment provides a vehicle-mounted subwoofer, including a vehicle-mounted subwoofer housing 1, which includes an upper shell 101 and a lower shell 102, and the upper shell 101 and the lower shell 102 form a closed space; a woofer 2 and a passive radiator 3 are provided on the upper shell 101, and the passive radiator 3 can emit sound simultaneously with the vibration of the woofer 2, and a piston device 4 that can move up and down is provided inside the vehicle-mounted subwoofer housing 1; when the internal air pressure of the vehicle-mounted subwoofer housing 1 changes, the piston device 4 will generate vibration in the same direction as the woofer 2, thereby compensating for the air pressure difference between the inside and outside of the vehicle-mounted subwoofer housing 1 to reduce air pressure resistance. Function: The vehicle subwoofer housing comprises an upper shell and a lower shell, forming a sealed space. The upper shell is equipped with a woofer and a passive radiator, which can produce sound simultaneously with the vibration of the woofer. The interior of the vehicle subwoofer housing is equipped with a piston device that can move up and down. When the internal air pressure of the vehicle subwoofer housing changes, the piston device will vibrate in the same direction as the woofer, thereby compensating for the air pressure difference between the inside and outside of the vehicle subwoofer housing and reducing air pressure resistance. This increases the vibration displacement of the passive radiator and improves its working efficiency. When the woofer is in operation, the air volume inside the vehicle subwoofer housing is compressed to a greater extent, which drives the passive radiator to move and produce a corresponding low-frequency response with the vehicle subwoofer housing. This can enhance the bass effect of the subwoofer and make the low-frequency dive deeper, making the sound sound solid and powerful, while also reducing the size of the vehicle subwoofer.

[0028] Specifically, the piston device 4 includes a partition 401. When the air pressure inside the vehicle subwoofer housing 1 changes, the cavities below and above the partition 401 generate a driving force, causing the partition 401 to vibrate in the same direction as the woofer 2. Function: The built-in piston device is composed of a cavity space within the vehicle subwoofer housing 1 and a partition, which effectively separates the upper and lower spaces. When the air pressure inside the vehicle subwoofer housing 1 changes, the cavities below and above the partition also generate a driving force, causing the partition 401 between the cavities to vibrate in the same direction as the woofer 2, thereby compensating for the air pressure difference between the inside and outside of the vehicle subwoofer housing 1 and reducing air pressure resistance.

[0029] Specifically, the piston device 4 further includes a spring device 402, which is connected to the partition 401 and can provide an upward elastic force to the partition 401. Function: The spring device 402 can provide elastic support to the partition 401.

[0030] Specifically, when the air pressure in the space above partition 401 is at standard atmospheric pressure, partition 401 forms a vertical force balance under the influence of atmospheric pressure, elastic force, and gravity. This function is to create a vertical force balance among atmospheric pressure, elastic force, and gravity when the air pressure in the space above is at standard atmospheric pressure.

[0031] Specifically, two spring devices 402 are provided between the partition 401 and the lower shell 102. The two spring devices 402 are distributed left and right and fixed on the lower shell 102. Function: Adding two left and right spring devices between the partition and the lower shell below makes the partition more balanced.

[0032] Specifically, the passive radiator 3 is in a runway shape, circular, or elliptical. Function: The passive radiator is in a runway shape (the size can be 90.7mm & 73.8mm). Through simulation, it is found that this runway design can effectively reduce resonance. At the same time, the vehicle subwoofer of this design has a longer appearance, and the overall appearance will be more coordinated.

[0033] Specifically, the passive radiator 3 includes a support bracket 301, a suspension assembly 302, and a counterweight 303, which are connected in sequence from the outside to the inside. The covering rubber surface 304 is bonded together with the counterweight 303 and the suspension assembly 302 by glue. The support bracket 301 is connected to the vehicle-mounted subwoofer housing 1, the suspension assembly 302 adopts a concave pattern design, and the counterweight 303 provides vibration mass. Function: The support bracket 301 mainly provides a support system for the entire passive radiator, and is generally composed of metal materials such as aluminum alloy and iron. The suspension assembly 302 is generally made of rubber. The suspension assembly of this solution adopts a concave pattern design to enhance the mechanical strength and reduce segmented movement under large displacement. The counterweight 303 (preferably composed of galvanized aluminum plate) provides vibration mass for the passive radiator. The covering rubber surface 304 is bonded together with the counterweight 303 and the suspension assembly 302 by glue, making the overall appearance more beautiful while also increasing the wear resistance.

[0034] In embodiment 1, two passive radiators 3 are provided on the upper shell 101, and the two passive radiators 3 are respectively arranged on the left and right sides of the woofer 2. Function: With the arrangement of the two passive radiators 3, the low-frequency resonance frequency of the vehicle-mounted subwoofer is lower, and the low-frequency dive will be greater, so that the bass effect will be stronger. Therefore, this solution adopts the method of adding two runway-type passive radiators with damping characteristic suspension components to the shell of the traditional vehicle-mounted subwoofer, and adding a piston device supported by two springs and a partition inside the shell of the vehicle-mounted subwoofer. The whole system forms a set of methods that utilize the internal and external air pressure difference and the expansion of the vibration area to enhance the vibration amplitude of the woofer, thereby enhancing the bass resonance effect, thereby enhancing the bass effect of the vehicle-mounted subwoofer, making the listening experience more shocking and powerful, and reducing the volume of the vehicle-mounted subwoofer, reducing the weight of the vehicle body, and improving the space utilization rate of the vehicle.

[0035] In Example 2, two passive radiators 3 are installed on the side walls of the vehicle subwoofer housing 1, one on each of the left and right sides. The woofer 2 is a dual-voice-coil, 2Ω woofer. Function: The four passive radiators 3 further lower the low-frequency resonance frequency of the vehicle subwoofer. Preferably, the woofer 2 is an 8-inch woofer.

[0036] Specifically, the upper shell 101 and lower shell 102 are made of plastic, respectively, and are ultrasonically welded together to form a sealed space. Function: The vehicle subwoofer housing 1 is composed of an upper shell and a lower shell made of plastic. The upper and lower shells are ultrasonically welded together to form a sealed space that cannot be leaked.

[0037] As a preferred embodiment, the vehicle-mounted subwoofer of this solution is a passive device with no electronic components in its internal space and only one connector interface that can be connected to an amplifier product.

[0038] During actual operation: when the woofer 2 and the passive radiator 3 vibrate inside and outside, the air pressure inside the vehicle subwoofer housing 1 will change. Because the vehicle subwoofer housing 1 is a fully enclosed rigid cavity, the air pressure inside the vehicle subwoofer housing 1 will increase when the woofer 2 vibrates inward, and the air pressure inside the vehicle subwoofer housing 1 will decrease when it vibrates outward, thereby forming an air pressure difference between the inside and outside, generating a force that hinders the vibration of the woofer 2.

[0039] When the air pressure inside the vehicle subwoofer housing 1 changes, the cavity below the partition and the cavity above the partition will also generate a driving force, causing the partition 401 between the cavities to vibrate in the same direction as the woofer 2, thereby compensating for the air pressure difference inside and outside the vehicle subwoofer housing 1 and reducing the air pressure resistance.

[0040] In this way, the vibration displacement of the passive radiator 3 of the car subwoofer can be increased to improve the working efficiency. When the woofer is working, the air volume in the car subwoofer shell is compressed and changed more, thereby driving the passive radiator to move and produce a corresponding low-frequency response with the car subwoofer shell, which can increase the bass effect of the subwoofer and make the low-frequency dive deeper. The sound will appear solid and powerful, and the volume of the car subwoofer can be reduced.

[0041] In order to better understand the present invention, the specific power-to-sound conversion principle of the present invention is as follows:

[0042] When a sine wave signal is applied to the vehicle subwoofer, the present invention first receives a positive half-cycle signal, causing the diaphragm of the woofer 2 to move outward. This movement causes the air inside the vehicle subwoofer housing 1 to expand, reducing the pressure inside the vehicle subwoofer housing 1 and causing the passive radiator to move toward the interior of the vehicle subwoofer housing 1. When the sine wave signal transitions to a negative half-cycle, the diaphragm of the woofer 2 moves inward, compressing the air inside the vehicle subwoofer housing 1. This causes the pressure inside the vehicle subwoofer housing 1 to rise, causing the passive radiator to move toward the exterior of the vehicle subwoofer housing 1. This allows the passive radiator to produce sound simultaneously with the vibration of the woofer 2. Therefore, the design of a passive radiating speaker subwoofer must be completely sealed, without any air leaks, otherwise the air inside the cavity will not be able to effectively drive the passive radiator.

[0043] In summary: a) Compared with traditional car subwoofers, the car bass enhancement system of this solution can make the amplitude of the subwoofer itself larger at the same power, thereby improving the efficiency of the entire subwoofer system to achieve enhanced bass effect.

[0044] b) This solution uses a method to balance the air pressure difference inside and outside the subwoofer box, which can effectively reduce the resonance of the vehicle subwoofer shell 1 and reduce the cutting vibration of the passive radiator. This can reduce the distortion of the vehicle subwoofer and make the sound clearer and cleaner.

[0045] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A vehicle-mounted subwoofer, comprising a vehicle-mounted subwoofer housing (1), characterized in that: The vehicle-mounted subwoofer housing (1) comprises an upper housing (101) and a lower housing (102), wherein the upper housing (101) and the lower housing (102) form a closed space; a woofer (2) and a passive radiator (3) are provided on the upper housing (101), wherein the passive radiator (3) can produce sound simultaneously with the vibration of the woofer (2); a piston device (4) that can move up and down is provided inside the vehicle-mounted subwoofer housing (1); when the internal air pressure of the vehicle-mounted subwoofer housing (1) changes, the piston device (4) will generate vibration in the same direction as the woofer (2), thereby compensating for the air pressure difference between the inside and outside of the vehicle-mounted subwoofer housing (1) and reducing air pressure resistance.

2. The vehicle-mounted subwoofer according to claim 1, characterized in that: The piston device (4) includes a partition (401). When the internal air pressure of the vehicle-mounted subwoofer housing (1) changes, the lower cavity and the upper cavity of the partition (401) also generate a driving force, so that the partition (401) generates vibration in the same direction as the subwoofer (2).

3. The vehicle-mounted subwoofer according to claim 2, characterized in that: The piston device (4) further comprises a spring device (402), wherein the spring device (402) is connected to the partition (401) and can provide an upward elastic force to the partition (401).

4. The vehicle-mounted subwoofer according to claim 3, characterized in that: When the air pressure in the cavity above the partition (401) is the standard atmospheric pressure, the partition (401) forms a vertical force balance under the action of atmospheric pressure, elastic force and gravity.

5. The vehicle-mounted subwoofer according to claim 3, characterized in that: Two spring devices (402) are provided between the partition (401) and the lower shell (102), and the two spring devices (402) are distributed left and right and fixed on the lower shell (102).

6. The vehicle-mounted subwoofer according to any one of claims 1 to 5, characterized in that: The passive radiator (3) is in a racetrack shape, a circular shape, or an elliptical shape.

7. The vehicle-mounted subwoofer according to claim 6, characterized in that: The passive radiator (3) comprises a supporting bracket (301), a suspension component (302), and a counterweight (303) connected in sequence from the outside to the inside, and a covering rubber surface (304) is bonded together with the counterweight (303) and the suspension component (302) by glue; the supporting bracket (301) is connected to the vehicle-mounted subwoofer housing (1), the suspension component (302) adopts a concave pattern design, and the counterweight (303) provides vibration mass.

8. The vehicle-mounted subwoofer according to any one of claims 1 to 5 and 7, characterized in that: The upper shell (101) is provided with two passive radiators (3), and the two passive radiators (3) are respectively arranged on the left and right sides of the woofer (2).

9. The vehicle-mounted subwoofer according to claim 8, characterized in that: The side walls of the vehicle-mounted subwoofer housing (1) are provided with two passive radiators (3), and the two passive radiators (3) are respectively arranged on the left and right side walls of the vehicle-mounted subwoofer housing (1); the woofer (2) is a dual-voice coil 2Ω woofer.

10. The vehicle-mounted subwoofer according to any one of claims 1 to 5, 7, and 9, characterized in that: The upper shell (101) and the lower shell (102) are respectively a plastic upper shell and a plastic lower shell, and the upper shell (101) and the lower shell (102) are ultrasonically welded together to form a closed space.

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