CN115567819A - Pressure balance earphone - Google Patents

Abstract

The invention provides a pressure balance earphone, which comprises: two earpieces, each of the earpieces including a housing defining an active chamber that acoustically couples a sound output side of a speaker to an ear of a user when the earpiece is worn by the user; further comprising a balancing mechanism disposed on a fluid pathway communicating the active chamber with an environment external to the earpiece; the counterbalance mechanism blocks air between the active chamber and the external environment; and the balance mechanism is configured to move on the fluid passage in response to the pressure changes inside and outside the active chamber, so that the volume of the space between the balance mechanism and the active chamber on the fluid passage can be changed, the pressure between the active chamber and the external environment can be balanced, the air pressure in the ear canal can be accurately adjusted, the wearing comfort of a user is improved, and the structure is simple.

Description

Pressure balance earphone

Technical Field

The invention relates to the field of audio output equipment, in particular to a pressure balance earphone.

Background

Whether listening to a portable media player during travel or a stereo or theater system at home, consumers often choose headphones. Headphones typically include a pair of ear cups that encircle the ears of a user and are held together by a headband. Headphones can be classified into two general categories based on the design of the earmuffs, i.e., closed-back earmuffs or open-back earmuffs. A closed-back earmuff surrounds the user's ear and has a sealed back. An open-back earmuff also surrounds the user's ear, but has a back that is open to the ambient environment surrounding the earmuff.

Both the closed back design and the open back design have their own acoustic advantages and disadvantages. For example, the closed-back earmuffs can have good sound insulation because they are isolated from ambient noise. In addition, the size and grip of the earmuff can be modified to further improve sound insulation. The features of the closed-back design, such as the sealed back of the earmuff, the size, and the clamping force, allow the design to mechanically or passively attenuate ambient noise. However, due to the closed design of the closed-back earmuff, pressure variations within the portion of the earmuff surrounding the user's ear can be uncomfortable. Open-back earmuffs, on the other hand, may feel more open to the user, but may not be ideal in noisy environments because their passive attenuation may not be as good as a closed-back design.

Disclosure of Invention

In view of the above-mentioned disadvantages in the prior art, the present invention provides a pressure balance earphone, comprising: two earpieces, each of the earpieces including a housing defining an active chamber that acoustically couples a sound output side of a speaker to an ear of a user when the earpiece is worn by the user; further comprising a balancing mechanism disposed on a fluid pathway communicating the active chamber with an environment external to the earpiece; the counterbalancing mechanism blocks air between the active chamber and the external environment; and the balancing mechanism is configured to move on the fluid pathway in response to pressure changes inside and outside the active chamber, thereby enabling a volume of a space on the fluid pathway between the balancing mechanism and the active chamber to be varied, thereby enabling equalization of the pressure between the active chamber and the external environment.

Preferably, the balancing mechanism at least partially obstructs sound propagation between the active chamber and the external environment.

Preferably, the counterbalance mechanism is made of a sound insulating material having a mass that produces insufficient gravitational force to overcome the restraining force on the fluid path on the position of the counterbalance mechanism.

Preferably, the balancing mechanism is at least partially made of a resilient sound insulating material configured to be capable of elastically deforming the balancing mechanism in response to pressure changes inside and outside the active chamber, so as to be capable of changing a volume of a space between the balancing mechanism and the active chamber on the fluid path, thereby being capable of at least partially equalizing the pressure between the active chamber and the external environment.

Preferably, the high pressure side surface area of the balancing mechanism increases when the pressure difference between the active chamber and the external environment exceeds a first preset threshold; the surface area of the balancing mechanism is unchanged when the pressure difference between the active chamber and the external environment does not exceed the first preset threshold.

Preferably, the balancing mechanism moves towards the low pressure side when the pressure difference between the active chamber and the external environment exceeds a second preset threshold; movement of the balancing mechanism when the pressure difference between the active chamber and the external environment does not exceed the second preset threshold; the first preset threshold is not equal to the second preset threshold.

Preferably, the fluid pathway further comprises a fluid inlet for receiving fluid from the fluid source, and a fluid outlet for receiving fluid from the fluid source.

Preferably, the actuating mechanism is further adapted to drive the balancing mechanism to an intermediate position of the fluid path after the pressure balancing headset is used.

Preferably, the device further comprises a pressure difference detection device for obtaining the pressure difference inside and outside the active chamber through detection.

Preferably, the balancing mechanism is provided with an iron part, and the actuating mechanism comprises a plurality of electromagnets which are arranged on or near the fluid passage and are uniformly arranged along the flow passing direction of the fluid passage; activating the electromagnet at the fluid pathway target location in response to a pressure change inside and outside the active chamber to cause the balancing mechanism to be attracted to the target location to equalize the pressure between the active chamber and the external environment.

Preferably, activating the electromagnet at the target location of the fluid pathway in response to a pressure change inside or outside the active chamber to cause the balancing mechanism to be attracted to the target location comprises: and sequentially switching on the electromagnets from the current position of the balance mechanism to the target position, so that the balance mechanism is gradually attracted to the target position.

Preferably, the loudspeaker further comprises a magnetic field shielding mechanism for preventing the magnetic field generated by the electromagnet from influencing the electromagnetic component of the loudspeaker.

Preferably, the actuating mechanism comprises a guide groove arranged on the side wall of the fluid passage, and a slide block fixedly connected to the balancing mechanism, wherein the slide block is slidably arranged in the guide groove; the sliding block is provided with a threaded hole, the actuating mechanism comprises a screw rod, and the screw rod is axially fixed in the guide groove; the screw rod is matched with the threaded hole, and the sliding block is driven to slide in the guide groove by the rotation of the screw rod relative to the guide groove.

Preferably, the fluid passages and the balancing mechanisms thereon are in multiple groups so as to be uniformly distributed on the outer peripheral side of the active chamber.

Preferably, the fluid passage middle section is an equal diameter section, the diameter of the fluid passage middle section is larger than the diameter of the fluid passage at the two end positions, the balancing mechanism moves on the middle section, and the two end positions of the fluid passage can prevent the balancing mechanism from being separated from the fluid passage.

The invention provides a pressure balance earphone, which comprises: two earpieces each including a housing defining an active chamber acoustically coupling a sound output side of a speaker to an ear of a user when the earpieces are worn by the user; further comprising a balancing mechanism disposed on a fluid pathway communicating the active chamber with an environment external to the earpiece; the counterbalance mechanism blocks air between the active chamber and the external environment; and the balance mechanism is configured to move on the fluid passage in response to the pressure changes inside and outside the active chamber, so that the volume of the space between the balance mechanism and the active chamber on the fluid passage can be changed, the pressure between the active chamber and the external environment can be balanced, the air pressure in the ear canal can be accurately adjusted, the wearing comfort of a user is improved, and the structure is simple.

Drawings

Fig. 1 is a schematic diagram of an internal structure of a pressure balance earphone according to an embodiment of the present invention.

Fig. 2 is a schematic diagram of an internal structure of a pressure balance earphone according to the embodiment of fig. 1.

Fig. 3 is a schematic diagram of the internal structure of another pressure balance earphone according to the embodiment of fig. 1.

Wherein, the earphone-100, the shell-101, the loudspeaker-102, the active chamber-103, the fluid channel-104, the electromagnet-105, the guide groove-106, the screw-107, the manual roller-108, the user-200, the external environment-300, the balance mechanism-400, the iron part-401 and the slide block-402.

Detailed Description

In order to solve the problem that the internal and external air pressure of the existing earphone is difficult to flexibly adjust, the pressure balance earphone provided by the invention is realized by the following technical scheme:

example (b):

the present embodiment provides a pressure balance earphone, please refer to fig. 1, including: two earpieces 100, each of the earpieces 100 comprising a housing 101, the housing 101 defining an active compartment 103, the active compartment 103 acoustically coupling a sound output side of a speaker 102 to an ear of a user 200 when the user 200 wears the earpiece 100; further comprising a balancing mechanism 400, said balancing mechanism 400 being arranged on a fluid passage 104 of the active chamber 103 in communication with the environment 300 outside said earpiece 100; the balancing mechanism 400 blocks air between the active chamber 103 and the external environment 300; and the balancing mechanism 400 is configured to move on the fluid pathway 104 in response to pressure variations inside and outside the active chamber 103, thereby enabling a change in the volume of the space on the fluid pathway 104 between the balancing mechanism 400 and the active chamber 103, thereby enabling equalization of the pressure between the active chamber 103 and the external environment 300.

In particular, the balancing mechanism 400 at least partially obstructs sound propagation between the active chamber 103 and the external environment 300.

Specifically, the counterbalance mechanism 400 is made of a sound dampening material having a mass that creates a weight force insufficient to overcome the restraining force on the fluid path 104 that restrains the position of the counterbalance mechanism 400.

In particular, the balancing mechanism 400 is at least partially made of an elastic sound-insulating material, configured to enable elastic deformation of the balancing mechanism 400 in response to pressure variations inside and outside the active chamber 103, thereby enabling a change of the volume of the space between the balancing mechanism 400 and the active chamber 103 on the fluid passage 104, thereby enabling at least partial equalization of the pressure between the active chamber 103 and the external environment 300.

In particular, when the pressure difference between the active chamber 103 and the external environment 300 exceeds a first preset threshold, the high pressure side surface area of the balancing mechanism 400 increases; the surface area of the balancing mechanism 400 does not change when the pressure difference between the active chamber 103 and the external environment 300 does not exceed the first preset threshold.

In particular, when the pressure difference between said active chamber 103 and said external environment 300 exceeds a second preset threshold, said balancing mechanism 400 moves towards the low pressure side; -the movement of the balancing mechanism 400 when the pressure difference between the active chamber 103 and the external environment 300 does not exceed the second preset threshold.

Specifically, the first preset threshold is not equal to the second preset threshold. By means of the elastic deformation of the balancing mechanism 400 and the movement of the balancing mechanism 400, the volume of the space between the balancing mechanism 400 and the active chamber 103 on the fluid path 104 can be changed, and the pressure between the active chamber 103 and the external environment 300 can be equalized. The first preset threshold and the second preset threshold are divided into three pressure difference intervals to form three working modes, that is, the pressure between the active chamber 103 and the external environment 300 is equalized through the elastic deformation of the balancing mechanism 400, the pressure between the active chamber 103 and the external environment 300 is equalized through the movement of the balancing mechanism 400, and the pressure between the active chamber 103 and the external environment 400 is equalized through the cooperation of the elastic deformation and the movement of the balancing mechanism 400. Therefore, the pressure balance earphone can be suitable for more application scenes.

Specifically, an actuation mechanism is also included for driving the balancing mechanism 400 to move on the fluid passage 104.

In particular, the actuation mechanism also serves to define the position of the counterbalance mechanism 400 on the fluid pathway 104.

In particular, the actuating mechanism is also used to drive the balance mechanism 400 to an intermediate position of the fluid passage 104 after the pressure balance headset is used.

Specifically, the device further comprises a pressure difference detection device for obtaining the pressure difference between the inside and the outside of the active chamber 103 through detection. The pressure difference detection device comprises at least two pressure sensors or pressure sensors, wherein one pressure sensor is used for detecting the pressure in the active chamber 103, and the other pressure sensor is used for detecting the pressure inside and outside the active chamber 103.

Specifically, the pressure difference detection device includes at least two deformation sensors, and is configured to obtain the pressure difference between the inside and the outside of the active chamber 103 by detecting the amount of elastic deformation at the two sides of the balance mechanism 400. The pressure balancing headset is able to adapt to changes in the pressure of the external environment 300, for example when used in an upland area, when used in an airplane, as opposed to merely detecting and focusing on the difference between the pressure in the active chamber 103 and the standard atmospheric pressure.

Specifically, the balance mechanism 400 is provided with an iron part 401, and referring to fig. 2, the actuating mechanism comprises a plurality of electromagnets 105 uniformly arranged on or near the fluid passage 104 along the flow direction of the fluid passage; activating the electromagnet 105 at the target location of the fluid passage 104 in response to pressure variations inside and outside the active chamber 103 such that the balancing mechanism 400 is attracted to the target location to equalize the pressure between the active chamber 103 and the external environment 300.

Specifically, activating the electromagnet 105 at the target location of the fluid passage 104 in response to pressure changes inside and outside the active chamber 103 to cause the balancing mechanism 400 to be attracted to the target location includes: the electromagnets 105 of the balance mechanism 400 from the current position to the target position are sequentially turned on so that the balance mechanism 400 is gradually attracted to the target position. If the current position of the balancing mechanism 400 is relatively far from the target position, a plurality of electromagnets 105 are spaced, and the electromagnets 105 from the current position of the balancing mechanism 400 to the target position are sequentially switched on, compared with the electromagnet 105 only activated at the target position, the action distance is shorter, and thus, only a smaller electromagnetic force needs to be provided at a single time; further, since the balance mechanism 400 moves step by step, it is easier to stop the movement of the balance mechanism 400 due to the operation of the user 200 or the like, or to change the movement speed of the balance mechanism 400 due to the halfway change of the target position.

Specifically, a magnetic field shielding mechanism is further included for preventing the magnetic field generated by the electromagnet 105 from affecting the electromagnetic components of the speaker 102.

Specifically, the actuating mechanism includes a guide groove 106 disposed on a sidewall of the fluid passage 104, see fig. 3, and a slide block 402 attached to the balance mechanism 400, the slide block 402 being slidably disposed in the guide groove 106; the sliding block 402 is provided with a threaded hole, the actuating mechanism comprises a screw 107, and the screw 107 is axially fixed in the guide groove 106; the threaded rod 107 is engaged with the threaded hole, and rotation of the threaded rod 107 relative to the guide slot 106 drives the sliding block 402 to slide in the guide slot 103. The screw 107 is rotated by a manual roller 108 or by a stepping motor.

Specifically, the surface of the balancing mechanism 400 facing the side of the active chamber 103 is provided with protrusions and/or grooves, thereby forming a rough surface.

Specifically, the fluid passages 104 and the balancing mechanisms 400 thereon are in multiple sets to be uniformly distributed on the outer peripheral side of the active chamber 103.

Specifically, the middle section of the fluid passage 104 is a constant diameter section, the diameter of the middle section of the fluid passage 104 is larger than the diameter of the fluid passage 104 at two end positions, the balancing mechanism 400 moves on the middle section, and the two end positions of the fluid passage 104 can prevent the balancing mechanism 400 from separating from the fluid passage 104. Dust screens are arranged at two ends of the fluid passage 104 to prevent foreign matters from entering the fluid passage 104.

The present embodiment proposes a pressure balance earphone, comprising: two earpieces 100, each of the earpieces 100 comprising a housing 101, the housing 101 defining an active compartment 103, the active compartment 103 acoustically coupling a sound output side of a speaker 102 to an ear of a user 200 when the user 200 wears the earpiece 100; further comprising a balancing mechanism 400, said balancing mechanism 400 being arranged on a fluid passage 104 of the active chamber 103 in communication with the environment 300 outside said earpiece 100; the balancing mechanism 400 blocks air between the active chamber 103 and the external environment 300; and the balancing mechanism 400 is configured to move on the fluid passage 104 in response to pressure changes inside and outside the active chamber 103, so that the volume of the space between the balancing mechanism 400 and the active chamber 103 on the fluid passage 104 can be changed, the pressure between the active chamber 103 and the external environment 300 can be equalized, accurate adjustment of the pressure inside the ear canal is achieved, wearing comfort of the user 200 is improved, and the structure is simple.

It should be noted that the above-mentioned embodiments are only examples for illustrating the present invention in further detail, and the person skilled in the art can make various modifications and variations on the above-mentioned embodiments without departing from the scope of the present invention.

Claims (15)

1. A pressure-balancing earphone, comprising: two earpieces, each of the earpieces including a housing defining an active chamber that acoustically couples a sound output side of a speaker to an ear of a user when the earpiece is worn by the user; wherein the balance mechanism is disposed in a fluid path communicating the active chamber with an environment external to the earpiece; the counterbalance mechanism blocks air between the active chamber and the external environment; and the balancing mechanism is configured to move on the fluid pathway in response to pressure changes inside and outside the active chamber, thereby enabling a volume of a space on the fluid pathway between the balancing mechanism and the active chamber to be varied, thereby enabling equalization of the pressure between the active chamber and the external environment.

2. A pressure equalizing earphone as recited in claim 1, wherein the equalizing mechanism at least partially blocks sound propagation between the active chamber and the external environment.

3. Pressure equalizing earphone according to claim 2, wherein the equalizing mechanism is made of a sound-insulating material, the mass of which generates a gravitational force that is insufficient to overcome the limiting force on the fluid path on the position of the equalizing mechanism.

4. A pressure equalizing earphone as recited in claim 3, wherein the equalizing mechanism is at least partially formed of a resilient sound insulating material and is configured to elastically deform the equalizing mechanism in response to changes in pressure inside and outside the active chamber, thereby changing a volume of a space between the equalizing mechanism and the active chamber in the fluid path and thereby at least partially equalizing the pressure between the active chamber and the external environment.

5. A pressure equalizing earphone as recited in claim 4, wherein a high pressure side surface area of the equalizing mechanism increases when a pressure difference between the active chamber and the external environment exceeds a first preset threshold; the surface area of the balancing mechanism is unchanged when the pressure difference between the active chamber and the external environment does not exceed the first preset threshold.

6. A pressure equalizing earphone as recited in claim 5, wherein the equalizing mechanism moves toward a low pressure side when a pressure difference between the active chamber and the external environment exceeds a second preset threshold; movement of the balancing mechanism when the pressure difference between the active chamber and the external environment does not exceed the second preset threshold; the first preset threshold is not equal to the second preset threshold.

7. Pressure equalizing earphone according to any one of claims 1 to 6, further comprising an actuating mechanism for driving the equalizing mechanism to move on the fluid path and/or for defining the position of the equalizing mechanism on the fluid path.

8. A pressure equalizing earphone as recited in claim 7, wherein the actuating mechanism is further configured to drive the equalizing mechanism to an intermediate position in the fluid passageway after use of the pressure equalizing earphone is terminated.

9. A pressure equalizing earphone as recited in claim 7, further comprising a pressure difference detecting device for obtaining the pressure difference between the inside and the outside of the active chamber by detection.

10. A pressure equalizing earphone as recited in claim 9, wherein the equalizing mechanism is provided with a ferrous portion, and the actuating mechanism comprises a plurality of electromagnets on or near the fluid path and uniformly arranged along a flow direction of the fluid path; activating the electromagnet at the fluid pathway target location in response to a pressure change inside and outside the active chamber to cause the balancing mechanism to be attracted to the target location to equalize the pressure between the active chamber and the external environment.

11. A pressure balancing earphone as recited in claim 10, wherein activating the electromagnet at the target location of the fluid path in response to changes in pressure inside and outside the active chamber to cause the balancing mechanism to be attracted to the target location comprises: and sequentially switching on the electromagnets from the current position of the balance mechanism to the target position, so that the balance mechanism is gradually attracted to the target position.

12. A pressure equalizing headphone as recited in claim 11, further comprising a magnetic field shielding mechanism for preventing a magnetic field generated by the electromagnet from affecting an electromagnetic component of the speaker.

13. Pressure equalizing headphones according to claim 9, wherein the actuating mechanism comprises guide grooves provided in the side walls of the fluid path, and a slide block attached to the equalizing mechanism, the slide block being slidably disposed in the guide grooves; the sliding block is provided with a threaded hole, the actuating mechanism comprises a screw rod, and the screw rod is axially fixed in the guide groove; the screw rod is matched with the threaded hole, and the sliding block is driven to slide in the guide groove by the rotation of the screw rod relative to the guide groove.

14. A pressure equalizing earphone as recited in claim 1, wherein the fluid passageways and the equalizing mechanisms thereon are in groups to be evenly distributed around the outside of the active chamber.

15. A pressure equalizing earphone according to claim 1, wherein the fluid passage middle section is an equal diameter section having a diameter greater than a diameter of the fluid passage at positions at both ends of the fluid passage, the equalizing mechanism moving on the middle section, the positions at both ends of the fluid passage being capable of preventing the equalizing mechanism from disengaging the fluid passage.

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