Open type loudspeaker assembly and intelligent helmet

Abstract

The invention discloses an open type horn assembly and an intelligent helmet, the open type horn assembly comprises a shell, a horn and an exhaust channel, a containing cavity is formed in the shell, and an abutting part is arranged in the containing cavity; the shell is provided with a sound guide port and an exhaust port; the loudspeaker is arranged in the containing cavity, the loudspeaker is provided with a first side and a second side which are oppositely arranged, the loudspeaker abuts against the abutting part so that the first side and one end of the containing cavity can be spaced to form a sound guide interval, and the sound guide interval is communicated with the sound guide opening; the second side and the other end of the accommodating cavity are spaced to form an exhaust interval, and the exhaust interval is communicated with the exhaust port; the exhaust channel is arranged outside the exhaust port, and the exhaust port is communicated with the exhaust channel and the exhaust interval, so that the second side is communicated with the outside of the shell. According to the intelligent helmet, sound can be guided to human ears through the open type loudspeaker assembly, air on the rear side of the loudspeaker can be exhausted through the exhaust channel, opposite-phase sound waves on the front side of the loudspeaker and the rear side of the loudspeaker are prevented from being mutually counteracted in a narrow space, and the better sound effect is provided.

Description

Technical Field

[0001] The present invention relates to the technical field of speaker equipment, and in particular to an open speaker assembly and a smart helmet. Background Art

[0002] Traditional headphones need to cover or plug into the user's ears during use to ensure the concentration of sound during riding. However, this also isolates most of the external sounds, which can easily cause danger during riding. Over-ear headphones are more suitable for use in a variety of scenarios due to their unique design and sound quality. For example, when riding or exercising outdoors, over-ear headphones allow users to enjoy music and stay alert to the surrounding environment at the same time; when working in the office or at home, they can provide a more immersive audio experience to help users better concentrate.

[0003] Currently, in the design of off-ear headphones, the speaker (loudspeaker) is usually enclosed in a cavity. When the speaker is working, it will generate sound waves in both its front and rear cavities. The sound waves in the front cavity are transmitted directly to the ear, while the sound waves in the rear cavity are reflected in the closed cavity. If not properly processed, the sound waves in the rear cavity may be transmitted to the front cavity. Due to the different sound wave paths of the front and rear cavities, there will be differences in the time they arrive at the front cavity, forming a phase difference. When the phase difference happens to cause the two sound waves to cancel each other when superimposed (that is, the peak and the trough meet), bass cancellation will occur, which greatly reduces the sound quality experience.

[0004] Therefore, there is an urgent need for an open speaker assembly and a smart helmet to overcome the above-mentioned defects. Summary of the invention

[0005] In order to overcome at least one of the defects described in the above-mentioned prior art, one of the objects of the present invention is to provide an open speaker assembly, which, by arranging a sound guide port and an exhaust channel on the shell, can control the propagation of sound waves to the human ear with both ears open, and at the same time can reduce the bass cancellation phenomenon between the rear and front sides of the speaker, thereby providing users with high-quality sound effects.

[0006] The second purpose of the present invention is to provide a smart helmet that wraps the user's head as a whole while opening both ears. By arranging an exhaust channel on the helmet to discharge the back pressure air behind the speaker, it is possible to prevent the sound waves of opposite phases at the front and rear sides of the speaker from canceling each other out in the shell.

[0007] One of the technical solutions adopted by the present invention to solve the problem is:

[0008] An open speaker assembly, comprising:

[0009] A shell, wherein a receiving cavity is provided in the shell, and a supporting portion is provided in the receiving cavity; a sound guide port and an exhaust port are provided on the shell;

[0010] A speaker, the speaker is arranged in the accommodating cavity, the speaker has a first side and a second side arranged opposite to each other, the speaker abuts against the abutting portion so that the first side is spaced from one end of the accommodating cavity to form a sound-conducting interval, the sound-conducting interval is communicated with the sound-conducting port; the second side is spaced from the other end of the accommodating cavity to form an exhaust interval, the exhaust interval is communicated with the exhaust port;

[0011] An exhaust passage is provided outside the exhaust port, and the exhaust port communicates with the exhaust passage and the exhaust interval so that the second side communicates with the outside of the shell.

[0012] Furthermore, the length and inner diameter of the exhaust channel are L and D respectively, the value range of L is 40-60 mm, and the value range of D is 8-10 mm.

[0013] Further, the accommodating cavity includes a bottom wall and a side wall, the abutting portion includes a step, the step is protruding on the side wall, the first side abuts against the step; the first side and the bottom wall are spaced to form the sound-conducting gap.

[0014] Furthermore, the accommodating cavity includes a bottom wall and a side wall, and the inner diameter of the side wall gradually decreases from one end away from the bottom wall to an end close to the bottom wall, so that the side wall forms the abutment portion; the outer periphery of the speaker abuts against the side wall, and the interval between the first side and the bottom wall forms the sound-conducting interval.

[0015] Furthermore, the width of the sound guiding interval gradually increases from an end away from the sound guiding opening to an end close to the sound guiding opening.

[0016] Furthermore, the shell includes a base and an upper cover, the base is protruding with a first side panel, the first side panel is arranged to surround the accommodating cavity, the upper cover is arranged above the base and is spaced apart from the upper end of the first side panel, so that the second side and the upper cover are spaced apart to form the exhaust gap.

[0017] Furthermore, the base is provided with a first half hole and a first pipe segment, the upper cover is provided with a second half hole and a second pipe segment, the first half hole and the second half hole are spliced ​​to form the exhaust port, the first pipe segment and the second pipe segment are spliced ​​to form an exhaust pipe, and the exhaust channel is located in the exhaust pipe.

[0018] Furthermore, a second side panel is protruding from the base, the second side panel is arranged around the outer periphery of the first side panel, and an exhaust cavity is formed between the second side panel and the first side panel, and the exhaust cavity is connected to the exhaust interval; the exhaust port is arranged on the second side panel, an exhaust pipe is connected to the exhaust port, and the exhaust channel is located in the exhaust pipe.

[0019] Furthermore, the first side panel includes a first arc wall, the second side panel includes a second arc wall, the first arc wall is connected to the second arc wall at both ends via a connecting rib segment; a sound guiding channel is formed between the two connecting rib segments, the sound guiding opening is formed between the second arc wall at both ends, the sound guiding channel connects the sound guiding interval and the sound guiding opening; a plurality of reinforcing rib segments are provided between the sound guiding channels, and the plurality of reinforcing rib segments are spaced apart along the circumferential direction.

[0020] The second technical solution adopted by the present invention to solve the problem is:

[0021] A smart helmet comprises a helmet body and an open speaker assembly as described above, wherein the open speaker assembly is arranged on at least one side of the helmet body, the helmet body is provided with a vent, the exhaust channel extends toward the rear side of the helmet body, and the exhaust channel is connected to the vent.

[0022] In summary, the open speaker assembly and smart helmet provided by the present invention have the following technical effects:

[0023] 1) Open speaker components can be applied to VR headsets, AR glasses, smart glasses, sports headbands, helmets and other devices. Through these devices, the speakers are fixed on the user's head or shoulders, while opening both ears, so that users can stay alert to the surrounding environment while enjoying music and games, and reduce ear discomfort.

[0024] 2) By providing an abutting portion in the shell, the speaker abuts against the abutting portion, so that a sound-conducting interval is formed between the first side of the speaker and the accommodating cavity. The speaker can redirect the sound waves on the first side through the sound-conducting interval and the sound-conducting port, so that the sound emitted by the diaphragm in the lateral direction can be redirected through the sound-conducting interval and then propagated longitudinally through the sound-conducting port, that is, the propagation direction of the sound and the vibration direction of the diaphragm of the speaker are approximately 90 degrees, thereby directionally propagating the sound toward the human ear above or below the device. At the same time, the second side of the speaker will generate back pressure during the vibration process, and the existence of back pressure will reduce the vibration amplitude of the diaphragm, resulting in a decrease in volume. The present application discharges the air in the exhaust interval to the outside of the shell through the exhaust port and the exhaust channel, which can reduce the obstruction of the internal anti-phase pressure to the vibration of the diaphragm, and also prevent the sound waves of opposite phases on the first side and the second side of the speaker from canceling each other out in the process of reaching the ear hole.

[0025] 3) When the smart helmet with the open speaker assembly is in use, when the user wears the helmet, the helmet can protect the user's head, and at the same time the helmet body will not cover the ears, the user can clearly hear the sounds of the surrounding environment, and enhance safety during riding; the air behind the speaker is discharged toward the top or rear of the helmet body through the exhaust channel on the helmet, so that the user can further increase the relative movement speed of the first side sound wave and the second side sound wave in the external environment during the forward riding process, and further prevent the second side sound wave from interfering with the first side sound wave in the process of reaching the ear hole.

[0026] 4) The exhaust channel is built into the helmet, which can reduce the generation of wind noise, making the user quieter and more comfortable when wearing the helmet. In addition, the present application utilizes the vents on the helmet for achieving ventilation inside and outside the helmet as the vents. By utilizing the existing structure, the number of slots in the helmet is reduced, and the strength of the helmet is ensured; at the same time, the vents can also reduce the accumulation of humidity and temperature inside the helmet, and improve the wearing comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of an open speaker assembly according to an embodiment of the present invention;

[0028] Figure 2 for Figure 1 Schematic diagram of the cross section at AA in the middle;

[0029] Figure 3 It is a schematic diagram of the structural disassembly of a housing according to an embodiment of the present invention;

[0030] Figure 4 A schematic structural diagram of a base according to an embodiment of the present invention;

[0031] Figure 5 A schematic diagram of the structure of an upper cover according to an embodiment of the present invention;

[0032] Figure 6 A schematic diagram of the structure of a smart helmet according to an embodiment of the present invention;

[0033] Figure 7 is a longitudinal cross-sectional view of a smart helmet according to an embodiment of the present invention along the front-to-back direction;

[0034] Figure 8 It is a rear view of an embodiment of the present invention.

[0035] The meanings of the reference numerals are as follows:

[0036] 1. Shell; 10. Accommodating cavity; 101. Bottom wall; 102. Side wall; 103. Step; 11. Sound guide port; 13. Sound guide interval; 14. Exhaust interval; 15. Exhaust pipe; 16. Sound guide hole; 2. Base; 21. First side panel; 22. First half hole; 23. First pipe section; 24. Second side panel; 25. Exhaust cavity; 26. Connecting rib section; 27. Sound guide channel; 28. Reinforcing rib section; 3. Upper cover; 31. Limiting rib section; 4. Helmet body; 40. Exhaust channel; 41. Vent; 42. Air guide channel; 43. Helmet shell; 44. Buffer layer; 45. Inlet channel; 46. Inlet port; 5. Speaker. DETAILED DESCRIPTION

[0037] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0038] In the description of the present invention, it should be noted that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the present invention.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0040] Embodiment 1

[0041] See also Figure 1 and Figure 2 The present invention discloses an open speaker assembly, which includes a shell 1, a speaker 5 and an exhaust passage 40. Specifically, a housing chamber 10 is provided in the shell 1, and a supporting portion is provided in the housing chamber 10; a sound guide port 11 and an exhaust port are provided on the shell 1. The speaker 5 is arranged in the housing chamber 10, and the speaker 5 has a first side and a second side that are arranged opposite to each other, wherein the speaker 5 abuts against the supporting portion so that the first side is spaced from one end of the housing chamber 10 to form a sound guide space 13, and the sound guide space 13 is connected to the sound guide port 11. At the same time, the second side is spaced from the other end of the housing chamber 10 to form an exhaust space 14, and the exhaust space 14 is connected to the exhaust port. In addition, the exhaust passage 40 is arranged outside the exhaust port, and the exhaust port connects the exhaust passage 40 and the exhaust space 14, so that the second side is connected to the outside of the shell 1.

[0042] It should be noted that the first side of the speaker 5 is the outer surface of the diaphragm, which is also the front side of the speaker 5. It directly faces the air and interacts with it, and is the direct source of sound generation. When the audio signal generates a magnetic field through the voice coil and interacts with the magnet of the speaker 5, the diaphragm will vibrate back and forth, and the first side directly pushes the surrounding air molecules forward, generating sound waves and propagating into the air. The second side is located at the rear side of the speaker 5, and is arranged opposite to the first side.

[0043] Based on this structure, when using the open speaker assembly of the present application, it can be applied to VR headsets, AR glasses, smart glasses, sports headbands, helmets and other devices. Through these devices, the speaker 5 is fixed on the user's head or shoulders, and both ears are open at the same time, so that the user can enjoy music and games while staying alert to the surrounding environment and reducing ear discomfort.

[0044] Specifically, the speaker 5 is correctly installed in the accommodating cavity 10, and it is ensured that the sound guide port 11 and the exhaust port are not blocked; then, the speaker assembly is connected to the audio source through an appropriate audio cable or wirelessly. When the audio signal is sent to the speaker assembly, the diaphragm vibrates back and forth in the front-to-back direction toward the first side and the second side, thereby generating sound waves on the front and back sides of the speaker 5. Among them, the sound waves are formed in the sound guide interval 13 and are initially diffused and sorted. The sound waves that have been initially diffused are then exported to the external environment through the sound guide port 11 for human ears to receive. At the same time, the second side of the speaker 5 (the side facing the exhaust interval 14) will generate back pressure during the vibration process, prompting the air in the exhaust interval 14 to be discharged to the outside of the housing 1 through the exhaust port, and the air discharged through the exhaust port is then guided by the exhaust channel 40 to be discharged in the direction away from the sound guide port 11.

[0045] In the process of playing audio, the diaphragm vibrates back and forth, so that sound waves are generated on both the front and rear sides of the speaker 5. However, the sound waves generated on the front and rear sides of the speaker 5 may meet and cancel each other out in the shell 1 in some cases, especially when the phases of these sound waves are opposite. This phenomenon is particularly obvious. Therefore, the present application discharges the air on the second side of the speaker 5 through the exhaust port, so that the sound waves on the second side inside the shell 1 will not cancel each other out with the sound waves on the first side, and prevents the sound waves of opposite phases from canceling each other out in the shell 1 with a smaller space. Then, the air discharged through the exhaust port is guided by the exhaust channel 40 to be discharged in a direction away from the sound guide port 11, so that the sound waves on the second side outside the shell 1 will not cancel each other out with the sound waves on the first side, especially reducing the cancellation of low-frequency sound waves, thereby improving the low-frequency sound quality, which makes the bass part fuller and thicker, and enhances the overall listening experience.

[0046] At the same time, when the diaphragm vibrates backward, it compresses the air behind the speaker 5; this part of the compressed air will try to rebound to its original state when the diaphragm returns to its original position, but due to the continuous vibration of the diaphragm, it will continue to be compressed and rebound, thereby forming a dynamic, compressed air area behind the speaker 5, that is, back pressure air. If this air cannot be discharged in time, it will accumulate in the shell 1, hindering the vibration of the speaker 5, thereby causing the response speed of the speaker 5 to slow down and affecting the clarity of the sound. Therefore, after the air behind the speaker 5 is discharged, the back pressure effect behind the speaker 5 can be reduced, allowing the speaker 5 to vibrate more freely, thereby producing a purer and fuller sound.

[0047] In addition, the present application forms a sound-conducting interval 13 between the first side of the speaker 5 and the accommodating chamber 10 by setting abutting portion in the accommodating chamber 10, and the speaker 5 rests on the abutting portion. It should be noted that if the abutting portion is not set, and the first side of the speaker 5 is directly abutted against the cavity wall of the accommodating chamber 10, and there is no sound-conducting interval 13 between the first side of the speaker 5 and the accommodating chamber 10, then when the sound is exported, it is necessary to open a sound-conducting port 11 in front of the first side of the speaker 5 to allow the sound waves to be transmitted forward. However, the open speaker assembly of the present application does not cover both ears, and the speaker 5 needs to propagate the sound upward or downward. In this case, the speaker 5 needs to be placed horizontally to ensure that the first side is facing upward or downward. However, the horizontal placement of the speaker 5 will occupy a large lateral space, and the installation space of some equipment is limited, so a long strip speaker will be used. However, the diaphragm diameter of the speaker 5 of the long strip speaker is small, and the high-frequency sound emitted is more, and the sound quality is poor.

[0048] In order to solve the above problem, the present application sets a butting portion in the accommodating cavity 10, so that when the speaker 5 is installed in the accommodating cavity 10, it can butt against the butting portion to form a sound-conducting interval 13 between the first side of the speaker 5 and the accommodating cavity 10, so that the speaker 5 can be used vertically, and the sound-conducting port 11 is set at the upper end or the lower end of the sound-conducting interval 13. In this way, when the speaker 5 is used vertically, the first side emits sound waves in the horizontal direction, and the sound waves are diffused and sorted in the sound-conducting interval 13, and can be guided upward or downward from the housing 1 by the sound-conducting port 11, so that the sound waves emitted horizontally by the speaker 5 can be redirected and propagated longitudinally, that is, the propagation direction of the sound is about 90 degrees to the vibration direction of the diaphragm of the speaker 5, so that the present application realizes that the sound waves on the first side can be redirected and guided by the setting position of the sound-conducting interval 13 and the sound-conducting port 11.

[0049] This allows the open speaker assembly of the present application to adapt to different equipment spaces. For example, when it is applied to a helmet, the speaker 5 can be placed vertically inside the helmet to reduce the horizontal space occupied by the helmet; the sound waves generated by the vibration of the speaker 5 first move horizontally, then are guided and redirected by the sound guide interval 13 and then guided downward through the sound guide port 11 to the vicinity of the human ear. At the same time, since the speaker 5 can be used vertically, the speaker 5 can use a larger diaphragm, so that the sound emitted by the speaker 5 has more bass parts, which can improve the sound quality, enhance the sound thickness and improve the balance of the sense of hearing.

[0050] Furthermore, the length and inner diameter of the exhaust channel 40 are L and D respectively, wherein the value range of L is 40-60 mm, and the value range of D is 8-10 mm.

[0051] It should be noted that the length and inner diameter of the exhaust channel 40 are not set randomly, and the effect of the length and inner diameter of the exhaust channel 40 on air discharge needs to be considered. Among them, when the inner diameter D of the exhaust channel 40 is the same, an excessively long channel may increase the resistance to air flow, resulting in poor discharge of back pressure air; if the back pressure air at the rear of the speaker 5 cannot be discharged in time, then the sound waves generated at the rear of the speaker 5 may meet and cancel each other with the sound waves at the front of the speaker 5 in the housing 1 in some cases, thereby affecting the bass part; at the same time, it will hinder the vibration of the speaker 5, resulting in problems such as a slower response speed of the speaker 5.

[0052] However, a channel that is too short may not provide enough space and time to smoothly discharge the back pressure air. Even after the back pressure air at the rear side of the speaker 5 is discharged outside the shell 1, because the exhaust channel 40 is too short, the sound waves at the rear side of the speaker 5 will meet the sound waves at the front side of the speaker 5 outside the shell 1 and cancel each other out, thereby affecting the bass part.

[0053] In addition, when the length L of the exhaust passage 40 is set to 40-60 mm, if the inner diameter D of the exhaust passage 40 is greater than 10 mm, then the excessively large inner diameter may reduce the acoustic damping effect of the exhaust passage 40, making the back pressure air too easy to be discharged, which may cause low-frequency resonance or distortion; and if the inner diameter D of the exhaust passage 40 is less than 8 mm, then the excessively small inner diameter may also increase the flow resistance, resulting in increased back pressure, thereby affecting the response speed and low-frequency performance of the speaker 5.

[0054] Therefore, the present application sets the length L of the exhaust channel 40 to 40-60 mm and the inner diameter D of the exhaust channel 40 to 8-10 mm, so as to reduce the resistance of air flow, so that the air behind the speaker 5 can be discharged more smoothly, and the sound wave cancellation phenomenon in the housing 1 can be reduced. At the same time, after the back pressure air behind the speaker 5 is discharged to the outside of the housing 1 through the exhaust channel 40, since the length of the exhaust channel 40 is moderate and the direction of the sound waves behind the speaker 5 is far away from the sound waves at the front of the speaker 5, the sound waves at the front and rear of the speaker 5 outside the housing 1 are not easily cancelled, thereby improving the bass playback effect. As a result, the sound waves on the first side are less affected by the sound waves on the second side, so that the exhaust effect and noise control can be balanced.

[0055] Furthermore, the accommodating chamber 10 includes a bottom wall 101 and a side wall 102. Figure 2 The abutting portion includes a step 103, and the step 103 is protruding from the side wall 102, and the first side of the speaker 5 abuts against the step 103, so that the first side and the bottom wall 101 are spaced to form the sound-conducting gap 13.

[0056] The inner diameter of the side wall 102 is the same from one end close to the bottom wall 101 to the end far from the bottom wall 101, and the outer diameter of the speaker 5 matches the inner diameter of the side wall 102. A step 103 is protruded on the side wall 102, so that after the speaker 5 is installed in the accommodating cavity 10, the first side periphery of the speaker 5 can abut against the step 103, so that the sound-conducting gap 13 exists between the first side surface and the bottom wall 101.

[0057] Thus, the sound-guiding gap 13 formed between the first side and the bottom wall 101 can guide the sound, help control the propagation direction of the sound, make the sound more concentrated and directional, and improve the listening experience. At the same time, the first side abuts against the step 103, which can ensure that the position of the speaker 5 in the accommodating cavity 10 is stable and not easily displaced due to vibration or external impact, thereby ensuring the stability and accuracy of the sound.

[0058] In other embodiments, the accommodating cavity 10 includes a bottom wall 101 and a side wall 102, and the inner diameter of the side wall 102 gradually decreases from one end away from the bottom wall 101 to the end close to the bottom wall 101, so that the side wall 102 forms abutment. The outer periphery of the speaker 5 abuts against the side wall 102, and the first side and the bottom wall 101 are spaced to form the sound-conducting interval 13.

[0059] In this embodiment, since the speaker 5 is against the side wall 102 through its own periphery, the vibration of the diaphragm will not be affected, and the diaphragm maintains its original vibration mode when making sound, reducing unnecessary vibration distortion. The gradual reduction of the inner diameter of the side wall 102 enhances the supporting effect of the accommodating cavity 10 on the speaker 5, improves the overall structural strength of the accommodating cavity 10, helps protect the speaker 5 from damage caused by external impact or vibration, and maintains a stable acoustic environment.

[0060] It should be noted that this arrangement can also improve the flexibility of use of the shell 1. The accommodating cavity 10 can adapt to speakers 5 of different sizes. Specifically, the variation range of the inner diameter of the side wall 102 and the position of the abutment portion can be adjusted to ensure that the speakers 5 of different sizes can be stably installed in the accommodating cavity 10.

[0061] Further, see Figure 3 The width of the sound guiding interval 13 gradually increases from an end away from the sound guiding opening 11 to an end close to the sound guiding opening 11 .

[0062] Based on this structure, when an audio signal is input to the speaker 5, the diaphragm of the speaker 5 begins to vibrate, generating sound waves. These sound waves are first formed on the first side of the speaker 5 (i.e., the side facing the sound guide interval 13), and propagate to the sound guide port 11 through the sound guide interval 13. As the width of the sound guide interval 13 gradually increases, the sound waves are affected by this shape during propagation; therefore, the sound waves are guided to the sound guide port 11 along the gradually widening sound guide interval 13.

[0063] It should be noted that the width of the sound-conducting interval 13 refers to the distance from the first side of the speaker 5 to the bottom wall 101. Specifically, the surface of the bottom wall 101 can be set to a non-flat surface, for example, the surface of the bottom wall 101 is gradually inclined or convex from the end away from the sound-conducting port 11 to the end close to the sound-conducting port 11 toward the side away from the speaker 5, so that the width of the sound-conducting interval 13 gradually increases.

[0064] When the sound waves enter the external environment through the sound guide port 11, they will further diffuse. Due to the guiding effect of the sound guide spacer 13, the sound waves have a certain directionality when leaving the sound guide port 11, which helps to reduce the scattering and reflection of the sound and improve the directivity of the sound.

[0065] Further, see Figure 3 The housing 1 includes a base 2 and an upper cover 3. A first side plate 21 is protruded from the base 2, and the first side plate 21 surrounds and forms a receiving cavity 10. Figure 2 The upper cover 3 is disposed above the base 2 and spaced apart from the upper end of the first side plate 21 , so that the second side is spaced apart from the upper cover 3 to form the exhaust space 14 .

[0066] On the basis of this structure, during assembly, the speaker 5 is installed in the accommodating cavity 10 of the base 2 and abutted against the abutting portion, so that a certain distance is maintained between the first side of the speaker 5 and the base 2 to form a sound-conducting interval 13. Subsequently, the upper cover 3 is placed above the base 2, but is not completely in contact with the upper end of the first side plate 21, but is spaced a certain distance apart, so that an exhaust interval 14 is formed between the second side of the speaker 5 and the upper cover 3.

[0067] When in use, sound waves are emitted from the first side of the speaker 5 and propagate to the external environment through the sound guide gap 13 and the sound guide port 11. When the speaker 5 vibrates, back pressure is generated on its second side; since the upper cover 3 is spaced apart from the upper end of the first plate, an exhaust gap 14 is formed, and the exhaust gap 14 is connected to the exhaust channel 40 through the exhaust port, air can smoothly enter the exhaust gap 14 and be discharged to the outside of the housing 1 through the exhaust port, and then the air discharged through the exhaust port is guided by the exhaust channel 40 to be discharged in a direction away from the sound guide port 11.

[0068] Thus, the exhaust of air from the exhaust gap 14 can reduce the obstruction of the internal reverse pressure (back pressure) to the vibration of the diaphragm, thereby ensuring the volume and sound quality of the speaker 5.

[0069] Further, see Figure 4 The base 2 is provided with a first half hole 22 and a first pipe section 23, and correspondingly, the upper cover 3 is provided with a second half hole and a second pipe section, and the first half hole 22 and the second half hole are spliced ​​to form the exhaust port, and the first pipe section 23 and the second pipe section are spliced ​​to form the exhaust pipe 15, and the exhaust channel 40 is located in the exhaust pipe 15.

[0070] On the basis of this structure, during assembly, after the speaker 5 and other electronic components are installed on the base 2, the upper cover 3 is placed above the base 2. In the process of connecting the upper cover 3 to the base 2, the first half hole 22 is spliced ​​with the second half hole, and the first pipe section 23 is spliced ​​with the second pipe section to form a continuous exhaust pipe 15.

[0071] The first pipe section 23 can be integrally formed on the base 2, and the second pipe section can be integrally formed on the upper cover 3, so that no additional pipe connection steps are required when assembling the speaker assembly, which can simplify the assembly process and improve production efficiency. At the same time, the stable connection between the assembled exhaust pipe 15 and the housing 1 can be ensured, reducing the problem of air leakage caused by loose or damaged connectors. In addition, since the exhaust pipe 15 is integrally formed on the outside of the exhaust port, the sealing steps between the exhaust pipe 15 and the exhaust port can be reduced.

[0072] Furthermore, a second side plate 24 is protruding from the base 2, and the second side plate 24 is arranged around the outer periphery of the first side plate 21, and an exhaust cavity 25 is formed between the second side plate 24 and the first side plate 21. The exhaust cavity 25 is connected to the exhaust interval 14. Figure 4 The exhaust port is disposed on the second side plate 24 , and the exhaust port is connected to the exhaust pipe 15 , and the exhaust passage 40 is located in the exhaust pipe 15 .

[0073] In this embodiment, a connector is provided at the exhaust port, and the exhaust pipe 15 is plug-connected to the connector. The plug-in connector makes the connection between the exhaust pipe 15 and the speaker assembly more flexible and convenient.

[0074] Based on this structure, when in use, the sound waves emitted from the first side of the speaker 5 are transmitted to the external environment through the sound guide interval 13 and the sound guide port 11. At the same time, since the exhaust cavity 25 is connected to the exhaust interval 14, the back pressure air on the second side of the speaker 5 enters the exhaust cavity 25 through the exhaust interval 14, and the air is dispersed and balanced in the exhaust cavity 25; when the back pressure air reaches the exhaust port through the exhaust cavity 25, the air is discharged to the outside of the housing 1 through the exhaust channel 40 in the exhaust pipe 15, completing the release of the back pressure and the balance of the air pressure.

[0075] The exhaust cavity 25 provides a larger buffer space and a smoother exhaust passage 40 for the back pressure air, which helps to release the air more quickly and effectively, reduce the bass cancellation on the front and rear sides of the speaker 5, and maintain the vibration stability and sound clarity of the speaker 5. The setting of the exhaust cavity 25 can reduce the noise and vibration caused by the sudden release of air, and further improve the overall performance of the speaker assembly and the user experience.

[0076] In addition, the second side plate 24 and the first side plate 21 are provided to form the accommodating chamber 10 and the exhaust chamber 25, which not only enhances the structural strength of the housing 1 but also makes the entire speaker assembly more stable and durable.

[0077] Further, the first side plate 21 includes a first arc wall, and the second side plate 24 includes a second arc wall. Specifically, the first and second ends of the first arc wall are respectively connected to the first and second ends of the second arc wall through a connecting rib segment 26. The two connecting rib segments 26 are arranged opposite to each other so that a sound guide channel 27 is formed between the two connecting rib segments 26, and the sound guide port 11 is formed between the first and second ends of the second arc wall, and the sound guide channel 27 connects the sound guide interval 13 and the sound guide port 11.

[0078] Among them, after the speaker 5 is installed in the accommodating cavity 10, the first arc wall is arranged around the outer periphery of the speaker 5, and a sound-conducting interval 13 is formed between the first side of the speaker 5 and the bottom wall 101, and the sound-conducting channel 27 is connected to the sound-conducting interval 13. When the speaker 5 vibrates, the sound waves can be guided to the sound-conducting port 11 more smoothly through the sound-conducting interval 13 on the side of the sound-conducting interval 13, and then propagate to the external space. The first and last ends of the first arc wall are respectively connected to the first and last ends of the second arc wall by a connecting rib section 26, which can ensure that a closed exhaust cavity 25 is formed between the first side panel 21 and the second side panel 24.

[0079] In addition, see Figure 5 The upper cover 3 is also provided with a limiting rib section 31. When the upper cover 3 is connected to the base 2, the two ends of the limiting rib section 31 along the circumferential direction respectively abut between the connecting rib sections 26 at the head and tail ends of the first arc wall, so that the limiting rib section 31 and the first arc wall are surrounded by a complete circular groove. When the speaker 5 is installed in the accommodating cavity 10, the limiting rib section 31 and the upper end of the first arc wall are jointly surrounded by the outer periphery of the speaker 5, thereby isolating the sound guide channel 27 of the speaker 5 from the exhaust interval 14 (the sound guide interval 13 and the exhaust interval 14 are isolated from each other by the speaker 5 body), that is, isolating the first side and the second side of the speaker 5, thereby preventing the sound waves from interfering with and canceling each other in the front and rear directions.

[0080] Furthermore, a plurality of reinforcing rib segments 28 are provided between the sound guiding channels 27 , and the plurality of reinforcing rib segments 28 are arranged at intervals along the circumferential direction.

[0081] The reinforcing rib segment 28 extends along the extension direction of the sound guide channel 27. When there is one reinforcing rib segment 28, the reinforcing rib segment 28 is spaced apart from the connecting rib segments 26 on both sides to form two sound guide channels 27; when there are multiple reinforcing rib segments 28, two adjacent reinforcing rib segments 28 are spaced apart to form a sound guide channel 27, and at the same time, the two reinforcing rib segments 28 at both ends in the circumferential direction are also spaced apart from the connecting rib segments 26 on both sides to form a sound guide channel 27.

[0082] Since the sound-guiding channel 27 of the present application is built into the housing 1, the sound can be better focused, making the sound more concentrated when propagating in a specific direction; this helps to reduce the diffusion and loss of sound, and improve the directivity and penetration of sound. When the open speaker assembly is used in combination with a helmet, the user can clearly hear the sound emitted by the speaker assembly even in a noisy environment or during riding.

[0083] In addition, see Figure 4The base 2 is provided with a plurality of sound guide holes 16, and the sound guide holes 16 penetrate the base 2 and communicate with the sound guide interval 13. When the speaker 5 is used vertically, a portion of the sound emitted from the first side of the speaker 5 can be laterally guided out through the sound guide holes 16 in front of the first side, and another portion of the sound emitted from the first side can be longitudinally guided out through the sound guide channel 27 and the sound guide port 11 after changing direction in the sound guide interval 13.

[0084] Therefore, by conducting sound in both horizontal and vertical directions, the sound can be more widely diffused to the surrounding space, avoiding the problem of excessive concentration of sound or lack of sound in certain directions, thereby improving the balance and hearing of the sound. In particular, when the open speaker assembly is applied to a helmet, the sound guided vertically can be directed toward the human ear, while the sound guided horizontally can reach the vicinity of the human ear through the human scalp, which helps to create a more three-dimensional sound field effect, allowing users to experience a more realistic and rich sound experience.

[0085] Embodiment 2

[0086] Different from the first embodiment, this embodiment discloses a smart helmet. Figure 6 , which comprises a helmet body 4 and the open speaker assembly as described above, wherein the open speaker assembly is arranged on at least one side of the helmet body 4. Figure 7 A vent 41 is provided on the helmet body 4 , and an exhaust passage 40 extends toward the rear side of the helmet body 4 , and the exhaust passage 40 is communicated with the vent 41 .

[0087] Based on this structure, during assembly, the open speaker assembly is connected to the side of the helmet body 4 through the shell 1, and the sound guide port 11 of the shell 1 is located at the lower edge of the helmet body 4. In addition, the helmet body 4 is provided with a mounting groove, which can be formed as an exhaust channel 40 of the open speaker assembly, or the exhaust channel 40 of the open speaker assembly can be installed in the mounting groove in the form of an exhaust pipe 15.

[0088] Specifically, when the mounting groove is formed as an exhaust passage 40 of an open speaker assembly, the mounting groove is arranged outside the exhaust port and communicates with the exhaust interval 14 through the exhaust port, that is, the air behind the speaker 5 can be discharged to the outside of the helmet through the exhaust port and the exhaust interval 14. When the exhaust passage 40 is installed in the mounting groove in the form of an exhaust pipe 15, the exhaust pipe 15 is connected to the exhaust port, and the end opening of the exhaust pipe 15 is communicated with the vent 41 on the helmet body 4; then the air behind the speaker 5 can enter the exhaust pipe 15 through the exhaust port, and is guided by the exhaust pipe 15 to the vent 41, and finally discharged to the outside of the helmet body 4 through the vent 41.

[0089] When using the helmet of the present application, the user can wear the helmet on the head, at this time the open speaker assembly does not cover the ears, the sound guide port 11 of the shell 1 is above the human ear, and the speaker 5 is vertically placed on at least one side of the helmet body 4. When the speaker 5 is in use, the sound emitted from the first side of the speaker 5 is guided and redirected by the sound guide spacer 13 in the shell 1 when it propagates horizontally, and is longitudinally guided to the sound guide port 11, so that the sound can be guided toward the human ear below.

[0090] At the same time, the air on the second side of the speaker 5 (the side of the speaker 5 facing the exhaust space 14) can be discharged to the exhaust channel 40 through the exhaust port, and finally discharged through the vent 41 on the helmet. In this way, the exhaust channel 40 reduces the possibility of low-frequency sound waves reflecting and interfering with each other in the shell 1 by timely discharging the air behind the speaker 5, thereby avoiding the cancellation of low-frequency sound waves and improving the low-frequency sound quality, which makes the bass part fuller and thicker, and improves the overall listening experience.

[0091] Among them, since the speaker 5 can be placed vertically, the speaker 5 can use a larger diaphragm, fully utilizing the longitudinal space of the helmet body 4 without occupying too much lateral space, ensuring that the shape of the helmet is not affected by the volume of the speaker 5. At the same time, the larger diaphragm can emit more low-frequency sounds, so that the user can obtain high-quality sound effects. In addition, when the user wears the helmet, the ears are not covered by the helmet body 4, and the user can clearly hear the sounds of the surrounding environment, thereby enhancing safety during riding.

[0092] In this embodiment, the exhaust channel 40 is built inside the helmet. It should be noted that if the exhaust channel 40 is placed outside the helmet in the form of a pipe, the external exhaust pipe 15 may become a source of wind noise when riding or moving at high speed. Therefore, the exhaust channel 40 is built inside the helmet in this application, which can reduce the generation of such wind noise and make the user more quiet and comfortable when wearing the helmet.

[0093] It is worth noting that the present application utilizes the ventilation holes on the helmet for achieving ventilation inside and outside the helmet as the vents 41. By utilizing the existing structure, there is no need to make additional grooves on the helmet as the vents 41, thereby reducing the number of grooves on the helmet and ensuring the strength of the helmet. At the same time, the vents 41 can also reduce the accumulation of humidity and temperature inside the helmet, thereby improving the wearing comfort.

[0094] See also Figure 7 The helmet includes a helmet shell 43 and a buffer layer 44, and an air guide channel 42 is provided between the helmet shell 43 and the buffer layer 44. Specifically, the air guide channel 42 is integrally formed with the helmet shell 43, wherein the buffer layer 44 is provided with a mounting port, one end of the air guide channel 42 is connected to the mounting port, and the other end of the air guide channel 42 is connected to the vent 41. In addition, the mounting port is connected to the exhaust channel 40 and the air guide channel 42.

[0095] Based on this structure, when in use, the air in the exhaust interval 14 first enters the exhaust channel 40, and the exhaust channel 40 is connected to the air guide channel 42 via the installation port, so that the air in the exhaust channel 40 enters the air guide channel 42 and is discharged through the vent 41.

[0096] The air guide channel 42 also connects the inside and outside of the helmet, where the inside of the helmet is the side where the buffer layer 44 contacts the human scalp, and the outside of the helmet is the outer surface of the helmet shell 43. That is, the air guide channel 42 in this embodiment has two functions. First, the air guide channel 42 serves as a bridge connecting the inside and outside of the helmet, allowing the warm and humid air inside the helmet to be discharged through the air guide channel 42, which helps to reduce the temperature and humidity inside the helmet and improve the wearing comfort of the user. Second, when air accumulates behind the speaker 5, the air can enter the air guide channel 42 through the exhaust channel 40 and be guided and discharged by the air guide channel 42.

[0097] Furthermore, the above-mentioned speaker assemblies are provided on both the left and right sides of the helmet, and two vents 41 are provided at intervals on the rear side of the helmet, and the two vents 41 are communicated with the two exhaust passages 40 respectively.

[0098] It should be noted that the rear side of the helmet refers to the part behind the midline of the helmet along the front-to-back direction, and the vent 41 can be arranged at the rear side of the helmet, at the oblique rear side of the helmet, or at the top of the helmet.

[0099] Based on this structure, the vent 41 is arranged on the rear side of the helmet, ensuring that when the exhaust channel 40 or the air guide channel 42 is connected to the vent 41, the air on the rear side of the speaker 5 can be discharged toward the rear side of the helmet, preventing the sound waves of opposite phases from interfering with the sound waves on the front side of the speaker 5 in the external environment, thereby reducing the sound wave interference between the rear and front sides of the speaker 5.

[0100] See also Figure 8 It is preferred to set the vent 41 on the rear side of the helmet, so that when the user wears the helmet and rides forward, the exhaust direction of the vent 41 is opposite to the movement direction of the user, which can increase the relative movement speed of the sound waves on the first side and the sound waves on the second side, and further prevent the sound waves on the second side from interfering with the sound waves on the first side in the external environment.

[0101] In addition, an air intake channel 45 is provided on the front side of the helmet, and the air intake channel 45 runs through the inside and outside of the helmet. Specifically, an air intake port 46 is provided on the helmet, one end of the air intake channel 45 is connected to the air intake port 46, and the other end of the air intake channel 45 is connected to the inside of the helmet, where the inside of the helmet refers to the side of the buffer layer 44 that contacts the human scalp.

[0102] When the user wears the helmet and rides forward, the oncoming wind will enter the air inlet 45 through the air inlet 46, and then introduce fresh air into the inside of the helmet. This active ventilation method effectively promotes the air flow inside the helmet and reduces the stuffiness. With the entry of fresh air, the hot air inside the helmet is gradually discharged through the rear vent 41, thereby achieving a heat dissipation effect and keeping the head dry and comfortable.

[0103] The technical means disclosed in the scheme of the present invention are not limited to the technical means disclosed in the above-mentioned implementation mode, but also include technical schemes composed of any combination of the above-mentioned technical features. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications are also regarded as the protection scope of the present invention.

Claims

1. An open speaker assembly, characterized in that: include, A shell, wherein a receiving cavity is provided in the shell, and a supporting portion is provided in the receiving cavity; a sound guide port and an exhaust port are provided on the shell; A speaker, the speaker is arranged in the accommodating cavity, the speaker has a first side and a second side arranged opposite to each other, the speaker abuts against the abutting portion so that the first side is spaced from one end of the accommodating cavity to form a sound-conducting interval, the sound-conducting interval is communicated with the sound-conducting port; the second side is spaced from the other end of the accommodating cavity to form an exhaust interval, the exhaust interval is communicated with the exhaust port; An exhaust passage is provided outside the exhaust port, and the exhaust port communicates with the exhaust passage and the exhaust interval so that the second side communicates with the outside of the shell.

2. The open speaker assembly according to claim 1, characterized in that: The length and inner diameter of the exhaust channel are L and D respectively, the value range of L is 40-60 mm, and the value range of D is 8-10 mm.

3. The open speaker assembly according to claim 1, characterized in that: The accommodating cavity includes a bottom wall and a side wall, the abutting portion includes a step, the step is protruding on the side wall, the first side abuts against the step; the first side and the bottom wall are spaced to form the sound-conducting space.

4. The open speaker assembly according to claim 1, characterized in that: The accommodating cavity includes a bottom wall and a side wall. The inner diameter of the side wall gradually decreases from one end away from the bottom wall to the end close to the bottom wall, so that the side wall forms the abutment portion; the outer periphery of the speaker abuts against the side wall, and the interval between the first side and the bottom wall forms the sound-conducting interval.

5. The open speaker assembly according to claim 3 or 4, characterized in that: The width of the sound guiding interval gradually increases from an end away from the sound guiding opening to an end close to the sound guiding opening.

6. The open speaker assembly according to claim 1, characterized in that: The shell includes a base and an upper cover, wherein a first side plate is protruding from the base, and the first side plate is arranged to surround the accommodating cavity. The upper cover is arranged above the base and is spaced apart from the upper end of the first side plate so that the second side is spaced apart from the upper cover to form the exhaust space.

7. The open speaker assembly according to claim 6, characterized in that: The base is provided with a first half hole and a first pipe section, the upper cover is provided with a second half hole and a second pipe section, the first half hole and the second half hole are spliced ​​to form the exhaust port, the first pipe section and the second pipe section are spliced ​​to form an exhaust pipe, and the exhaust channel is located in the exhaust pipe.

8. The open speaker assembly according to claim 6, characterized in that: A second side plate is protruding from the base, the second side plate is arranged around the outer periphery of the first side plate, and an exhaust cavity is formed between the second side plate and the first side plate, and the exhaust cavity is communicated with the exhaust interval; the exhaust port is arranged on the second side plate, an exhaust pipe is connected to the exhaust port, and the exhaust channel is located in the exhaust pipe.

9. The open speaker assembly according to claim 8, characterized in that: The first side panel includes a first arc wall, and the second side panel includes a second arc wall. The first arc wall is connected to the second arc wall at both ends via a connecting rib segment. A sound guiding channel is formed between the two connecting rib segments. The sound guiding opening is formed between the second arc wall at both ends. The sound guiding channel connects the sound guiding interval and the sound guiding opening. A plurality of reinforcing rib segments are arranged between the sound guiding channels, and the plurality of reinforcing rib segments are arranged at intervals along the circumferential direction.

10. A smart helmet, characterized in that: It comprises a helmet body and an open speaker assembly as described in any one of claims 1 to 9, wherein the open speaker assembly is arranged on at least one side of the helmet body, a vent is provided on the helmet body, the exhaust passage extends toward the rear side of the helmet body, and the exhaust passage is connected to the vent.

Images