CN219068313U - Sound production device and wearing equipment - Google Patents

Abstract

The utility model discloses a sound generating device, which comprises: the shell is internally provided with a cavity; the double-sided sound generating unit is arranged in the cavity, the double-sided sound generating unit is matched with the shell to define a first front sound cavity, a second front sound cavity and a rear sound cavity in the cavity, four sound holes communicated with the cavity are formed in the shell, two sound holes are respectively communicated with the first front sound cavity, and the other two sound holes are respectively communicated with the second front sound cavity; the four sound holes are distributed at intervals along the length direction of the shell, the sound wave phases emitted by the two sound holes at two ends are first phases, the sound wave phases emitted by the two sound holes in the middle are second phases, the polarities of the first phases and the second phases are opposite, and the sound wave emitted by the two sound holes at two ends and the sound wave emitted by the two sound holes in the middle form a quadrupole effect in a far field. The sound generating device disclosed by the utility model can realize a better effect of reducing far-field leakage sound.

Description

Sound production device and wearing equipment

Technical Field

The utility model relates to the technical field of electroacoustic, in particular to a sound generating device and wearing equipment.

Background

The externally-placed audio device is widely applied to wearable equipment such as an AR, a VR and a headset, and along with the continuous upgrading of the use demands of users, the requirement for privacy protection of the externally-placed audio device is higher and higher.

The design of the existing external audio device has serious sound leakage problem, and the requirement of protecting the privacy of users is difficult to achieve. Although the existing products have the anti-sound leakage design utilizing the acoustic dipole principle, the requirement of protecting the privacy of users is far from being met.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides the sound generating device which has the advantage of reducing far-field sound leakage.

The utility model further provides wearing equipment with the sounding device.

According to an embodiment of the first aspect of the present utility model, a sound emitting device includes: the shell is internally provided with a cavity; the double-sided sound generating unit is arranged in the cavity, the double-sided sound generating unit is matched with the shell to define a first front sound cavity, a second front sound cavity and a rear sound cavity in the cavity, four sound holes communicated with the cavity are formed in the shell, two sound holes are respectively communicated with the first front sound cavity, and the other two sound holes are respectively communicated with the second front sound cavity; the four sound holes are distributed at intervals along the length direction of the shell, the sound wave phases emitted by the two sound holes at two ends are first phases, the sound wave phases emitted by the two sound holes in the middle are second phases, the polarities of the first phases and the second phases are opposite, and the sound waves emitted by the two sound holes at two ends and the sound waves emitted by the two sound holes in the middle form a quadrupole effect in a far field.

According to the sound generating device of the embodiment of the first aspect of the utility model, the double-sided sound generating unit and the sound generating device shell define a first front sound cavity and a second front sound cavity, four sound holes are arranged on the shell at intervals along the length direction, and the four sound holes are communicated with the first front sound cavity and the second front sound cavity in a group of two-by-two mode. The two sound holes at the far end and the two sound holes in the middle emit sound waves with opposite phase polarities, and a quadrupole effect is formed in the far field. By the arrangement, the sound radiation power of the sound generating device is reduced, compared with the sound leakage prevention design of the existing product, the far-field sound leakage is greatly reduced, the privacy protection requirement of a user is met, and meanwhile, according to the virtual sound image, the sound generating device provided by the utility model further enhances the volume of the in-ear sound while reducing the sound leakage, and the user experience can be improved.

According to some embodiments of the present utility model, four projection sound holes are formed by vertical projection of the four sound holes on a horizontal plane, and along a length direction of the housing, the four projection sound holes are a first projection sound hole, a second projection sound hole, a third projection sound hole and a fourth projection sound hole in sequence, wherein a first line segment is formed by connecting central positions of the first projection sound hole and the second projection sound hole, a second line segment is formed by connecting central positions of the third projection sound hole and the fourth projection sound hole, and an included angle θ between the first line segment and the second line segment is greater than or equal to 90 °.

In some embodiments of the utility model, the first line segment and the second line segment are arranged co-linearly.

According to some embodiments of the utility model, the distance between the central positions of the two sound holes at the two ends is L1, and the distance between the central positions of the two sound holes at the middle is L2, wherein L1 is equal to or greater than 2×l2.

According to some embodiments of the utility model, four of the sound holes are a first sound hole, a second sound hole, a third sound hole, and a fourth sound hole in this order along the length direction of the housing, a spacing between the first sound hole and a center position of the second sound hole is L3, a spacing between the second sound hole and a center position of the third sound hole is L4, a spacing between the third sound hole and a center position of the fourth sound hole is L5, L4 < L3, and L4 < L5.

In some embodiments of the utility model, a spacing L3 between the center positions of the first sound hole and the second sound hole and a spacing L5 between the center positions of the third sound hole and the fourth sound hole satisfy the relation: l3=l5.

According to some embodiments of the utility model, the two sound holes located in the middle are communicated to form a combined sound hole.

In some embodiments of the present utility model, along the length direction of the housing, the extension length of the combined sound hole is L6, and the distance between the central positions of the two sound holes at two ends is L1, where L1 is greater than or equal to 2×l6.

In some embodiments of the present utility model, perpendicular projections of the two acoustic holes and the combined acoustic hole at two ends on a horizontal plane form a first side projection acoustic hole, a combined projection acoustic hole and a second side projection acoustic hole, respectively, wherein a line connecting the first side projection acoustic hole and a central position of the combined projection acoustic hole forms a third line segment, a line connecting the second side projection acoustic hole and a central position of the combined projection acoustic hole forms a fourth line segment, and an included angle α between the third line segment and the fourth line segment is greater than or equal to 90 °.

In some embodiments of the utility model, the third line segment and the fourth line segment are disposed co-linearly.

According to some embodiments of the utility model, the double-sided sound generating unit comprises: the magnetic circuit system is provided with a magnetic gap; the first vibrating system and the second vibrating system are arranged on two opposite sides of the magnetic circuit system, the first vibrating system comprises a first vibrating diaphragm assembly and a first voice coil, the second vibrating system comprises a second vibrating diaphragm assembly and a second voice coil, a first front sound cavity is defined between the first vibrating diaphragm assembly and the inner wall of the shell, a second front sound cavity is defined between the second vibrating diaphragm assembly and the inner wall of the shell, and the first voice coil and the second voice coil are positioned on two opposite sides of the magnetic circuit system and are all inserted into the magnetic gap, and the vibrating directions of the first vibrating system and the second vibrating system are the same.

According to some embodiments of the utility model, the double-sided sound generating unit comprises: the first sound generation unit comprises a first magnetic circuit system and a first vibration system, wherein the first magnetic circuit system is provided with a first magnetic gap, the first vibration system comprises a first vibrating diaphragm assembly and a first voice coil, the first voice coil is inserted into the first magnetic gap, and a first front sound cavity is defined between the first vibrating diaphragm assembly and the inner wall of the shell; the second sound production monomer, the second sound production monomer with first sound production monomer is set up dorsad, the second sound production monomer includes second magnetic circuit and second vibration system, second magnetic circuit with first magnetic circuit is set up and is equipped with the second magnetic gap dorsad, second vibration system includes second vibrating diaphragm subassembly and second voice coil loudspeaker voice coil, the second voice coil loudspeaker voice coil is inserted and is located in the second magnetic gap, the second vibrating diaphragm subassembly with inject between the inner wall of shell the preceding sound cavity of second.

A wearable device according to an embodiment of the second aspect of the present utility model comprises a sound emitting apparatus according to an embodiment of the above-described first aspect of the present utility model.

According to the wearing equipment disclosed by the second aspect of the embodiment of the utility model, by arranging the sounding devices of the embodiment, namely arranging the four sound holes which are arranged at intervals along the length direction of the shell on the shell of the sounding device adopting the double-sided sounding unit, sound waves emitted by the four sound holes form a quadrupole effect in a far field, so that far-field sound leakage of the wearing equipment is greatly reduced, the volume of in-ear sound is enhanced, the privacy of a user is greatly protected, and the user experience is further improved.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is an exploded view of a sound emitting device according to one embodiment of the present utility model;

FIG. 2 is a top view of a sound emitting device according to one embodiment of the present utility model;

FIG. 3 is a cross-sectional view of the sound emitting device of FIG. 2 taken along the direction A-A in accordance with one embodiment of the present utility model;

FIG. 4 is a top view of a sound emitting device according to one embodiment of the present utility model;

FIG. 5 is a schematic diagram of the sound generating apparatus according to the embodiment of the present utility model shown in FIG. 4;

FIG. 6 is a schematic diagram of the sound generating apparatus according to the embodiment of the present utility model shown in FIG. 4;

FIG. 7 is a schematic diagram of a sound generating apparatus according to another embodiment of the present utility model;

fig. 8 is a schematic structural diagram of a sound generating device according to another embodiment of the present utility model shown in fig. 7.

Reference numerals:

the sound-emitting device 100 is configured to emit light,

the housing 1, the first shell 11, the second shell 12, the first sound hole 21, the second sound hole 22, the third sound hole 23, the fourth sound hole 24, the combined sound hole 25, the first front sound chamber 31, the second front sound chamber 32,

a double-sided sound generating unit 4.

The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present utility model, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present utility model, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

The description of the orientations of "up", "down", "front", "rear", "left", "right", etc. in the present utility model is based on the orientation shown in fig. 1, and is merely for explaining the relative positional relationship between the components in the posture shown in fig. 1, and if the specific posture is changed, the directional indication is changed accordingly.

A sound generating device 100 according to an embodiment of the first aspect of the present utility model is described in detail below with reference to fig. 1-8, wherein the sound generating device 100 may be a speaker.

As shown in fig. 1 to 8, a sound emitting device 100 according to an embodiment of the first aspect of the present utility model includes: the shell 1, the cavity is arranged in the shell 1; the double-sided sounding unit 4 is arranged in the cavity of the shell 1, the double-sided sounding unit 4 and the shell 1 are matched to define a first front sound cavity 31, a second front sound cavity 32 and a rear sound cavity 33 in the cavity, four sound holes communicated with the cavity are formed in the shell 1, two sound holes are respectively communicated with the first front sound cavity 31, the other two sound holes are respectively communicated with the second front sound cavity 32, and the rear sound cavity 33 is a closed sound cavity formed by enclosing the double-sided sounding unit 4 and the shell 1; the four sound holes are distributed at intervals along the length direction of the shell 1, the sound wave phases emitted by the two sound holes at two ends are opposite to the sound wave phases emitted by the two sound holes in the middle, and the sound wave emitted by the two sound holes at two ends and the sound wave emitted by the two sound holes in the middle form a quadrupole effect in a far field.

Specifically, in the embodiment shown in fig. 1-5, the housing 1 of the sound generating device 100 includes a first housing 11 and a second housing 12, the two-sided sound generating unit 4 is fixed on the second housing 12, the first housing 11 covers the second housing 12 to form a cavity, two opposite sides of the two-sided sound generating unit 4 along the thickness direction enclose the first front sound cavity 31 and the second front sound cavity 32 which are isolated from each other with the first housing 11 and the second housing 12, the side wall of the two-sided sound generating unit 4 encloses the first housing 11 and the second housing 12 to form a closed rear sound cavity, four sound holes are formed in the housing 1, in this embodiment, as shown in fig. 5, the four sound holes are respectively a first sound hole 21, a second sound hole 22, a third sound hole 23 and a fourth sound hole 24 which are sequentially formed along the length direction of the housing 1, wherein the first sound hole 21, the fourth sound hole 24 are communicated with the second front sound cavity 32, the first sound hole 21 and the second sound hole 24 are located at two ends of the housing 1 in the length direction, the two-sided sound holes 22 are respectively located at the second sound hole 21, the second sound hole 23 and the second sound hole 24 are located at the two ends of the second sound hole 21 and the second sound hole 23, the second sound hole 23 are located at the two-side sound hole 23 and the second sound hole 24 are located at the two-side hole 1 in the two-sided sound hole 1, and the second sound hole 1 are located at the two sound hole 2, and the two sound hole 2 is located at the two sound hole 4 is located at the two front hole 4, as shown in the second sound hole 4 is in the second sound hole is in the sound hole is. That is, according to the four-pole theory, the first sound hole 21 and the fourth sound hole 24 located at two ends in the length direction of the casing 1 may be positive sound holes, the second sound hole 22 and the third sound hole 23 located in the middle may be negative sound holes, the positive and negative are relative concepts, and similarly, the first sound hole 21 and the fourth sound hole 24 may also be negative sound holes, the corresponding second sound hole 22 and the third sound hole 23 are positive sound holes, and the phase difference between the positive sound hole and the negative sound hole is 180 degrees, thereby forming a four-pole effect in the far field, i.e., in the direction away from the human ear. Therefore, sound waves emitted by the positive electrode sound hole and the negative electrode sound hole are mutually overlapped in a far field, the sound leakage quantity of the far field can be obviously reduced, and the use privacy of the sound generating device can be further improved.

According to the sound generating device 100 of the first embodiment of the present utility model, the double-sided sound generating unit 4 and the sound generating device housing 1 define a first front sound cavity 31 and a second front sound cavity 32, four sound holes are arranged on the housing 1 at intervals along the length direction, and the four sound holes are in communication with the first front sound cavity 31 and the second front sound cavity 32 respectively. The two sound holes at the far end and the two sound holes in the middle emit sound waves with opposite phase polarities, and a quadrupole effect is formed in the far field. By the arrangement, the sound radiation power of the sound generating device is reduced, compared with the sound leakage prevention design of the existing product, the far-field sound leakage is greatly reduced, the privacy protection requirement of a user is met, and meanwhile, according to the virtual sound image, the sound generating device provided by the utility model further enhances the volume of the in-ear sound while reducing the sound leakage, so that the near-field performance of the sound generating device 100 is greatly improved, and the user experience is greatly improved.

In the embodiment shown in fig. 1, the first sound hole 21 and the fourth sound hole 24 are formed by buckling a groove structure formed on the side wall of the second housing 12 toward the direction of the first housing 11, and the end opening is formed on the side wall of the first housing 11, and the second sound hole 22 and the third sound hole 23 are formed by two through holes arranged side by side along the length direction on the side wall of the second housing 12, alternatively, in other embodiments, four sound holes formed in the housing 1 may be formed by forming through holes in the first housing 11 or the second housing 12, and the first housing 11 or the second housing 12 may be matched with each other, and the combination and the selection may be freely selected according to practical situations, which is not limited herein. In addition, it should be emphasized that in the illustrated embodiment of the present utility model, the first front acoustic chamber 31, the second front acoustic chamber 32 and the rear acoustic chamber 33 are enclosed by the housing 1 of the acoustic device 100 and the double-sided acoustic unit 4, and in other embodiments, the double-sided acoustic unit 4 may also cooperate with the corresponding terminal housing to form the corresponding first front acoustic chamber 31, the second front acoustic chamber 32 and the rear acoustic chamber, that is, the illustrated embodiment of the present utility model is only one implementation manner of the present utility model, and other modified structures that employ similar technical features as the present utility model are also within the scope of the present utility model.

In some embodiments of the present utility model, four sound holes formed in the housing 1 of the sound generating device 100 form four projection sound holes by vertical projection on a horizontal plane, and the four projection sound holes are sequentially a first projection sound hole, a second projection sound hole, a third projection sound hole and a fourth projection sound hole along a length direction, wherein a line between central positions of the first projection sound hole and the second projection sound hole forms a first line segment, a line between central positions of the third projection sound hole and the fourth projection sound hole forms a second line segment, and an included angle θ between the first line segment and the second line segment is greater than or equal to 90 °.

In the embodiment shown in fig. 4, the first projected sound hole, the second projected sound hole, the third projected sound hole, and the fourth projected sound hole are projected sound holes formed by vertical projection of the first sound hole 21, the second sound hole 22, the third sound hole 23, and the fourth sound hole 24 in the horizontal plane direction in this order. The first line segment is formed by connecting a first projection sound hole formed by vertically projecting the first sound hole 21 and the second sound hole 22 in the horizontal plane direction with the central position of the second projection sound hole, the second line segment is formed by connecting a third projection sound hole formed by vertically projecting the third sound hole 23 and the fourth sound hole 24 in the horizontal plane direction with the central position of the fourth projection sound hole, the first line segment and the second line segment are formed by projecting the four sound holes in the same horizontal plane, an included angle theta is formed between the straight lines where the first line segment and the second line segment are located, and the theta is more than or equal to 90 degrees. Therefore, the quadrupole effect of the far field can be ensured, the far-field sound leakage is reduced, and the sound listening effect of the near field can be ensured.

Specifically, when the included angle θ between the first line segment and the second line segment is smaller and smaller than 90 °, that is, the distance between the sound holes at the two ends and the sound hole in the middle is smaller and smaller, so that the superposition effect of the sound waves emitted by the sound holes at the two ends and the sound waves emitted by the sound holes in the middle is reduced in the far field, and the sound leakage amount in the far field is increased; meanwhile, the volume of the in-ear sound can be reduced in the near field, and the hearing effect of the user is affected. Alternatively, the included angle θ between the first line segment and the second line segment may be 90 °, 120 °, 150 °, or the like.

Further, in some embodiments of the present utility model, the first line segment and the second line segment may be arranged in a collinear manner, that is, as shown in fig. 4, an included angle θ between the first line segment and the second line segment is 180 °, so that the sound leakage amount in the far field can be reduced, and meanwhile, the volume of the near field entering the ear is increased, and the listening effect of the near field is improved.

In some embodiments of the present utility model, the spacing between the center positions of the sound holes at two ends of the sound generating device 100 is L1, and the spacing between the center positions of the two sound holes in the middle is L2, where L1 is equal to or greater than 2×l2.

Specifically, in the embodiment shown in fig. 5, the sound holes at two ends of the housing 1 in the length direction are a first sound hole 21 and a fourth sound hole 24, the distance between the centers of the first sound hole 21 and the fourth sound hole 24 is L1, the two sound holes at the middle of the housing 1 in the length direction are a second sound hole 22 and a third sound hole 23, and the distance between the second sound hole 22 and the third sound hole 23 is L2. The dimensional relationship between L1 and L2 satisfies that L1 is more than or equal to 2L 2, namely, the distance between the positive and negative electrode sound holes is ensured to be large enough, so that sound waves emitted by four sound Kong Fu are prevented from being seriously counteracted in a near field due to the fact that the distance between the positive and negative electrode sound holes is too small, the sensitivity of sound received by human ears is greatly reduced, and further, the sound volume of the in-ear sound is increased while the sound leakage is reduced.

Further, in some embodiments of the present utility model, as shown in fig. 6, the first acoustic hole 21, the second acoustic hole 22, the third acoustic hole 23, and the fourth acoustic hole 24 are four acoustic holes sequentially arranged along the length direction of the casing 1, wherein the spacing between the center positions of the first acoustic hole 21 and the second acoustic hole 22 is L3, the spacing between the center positions of the second acoustic hole 22 and the third acoustic hole 23 is L4, and the dimensional relationship between the center positions of the third acoustic hole 23 and the fourth acoustic hole 24 is L5, L3, L4, and L5 is as follows: l4 > L3 and L4 > L5. By the arrangement, the distance from two sound holes with the same phase and located at two ends of the length direction of the shell 1 to the adjacent sound holes located at the middle position of the length direction of the shell 1 can be ensured to be larger than the distance between the two sound holes located at the middle position of the length direction of the shell 1. Therefore, the sound waves emitted by the four sound Kong Fu are seriously counteracted in the near field due to the fact that the distances between the positive electrode sound holes and the negative electrode sound holes are too close, and the sensitivity of the sound received by the human ear is greatly reduced. It should be emphasized that in the present embodiment, the size relationship between L3 and L5 is not limited, that is, the distance between the first sound hole 21 and the second sound hole 22, and the distance between the third sound hole 23 and the fourth sound hole 24 are ensured to be larger than the distance between the second sound hole 22 and the third sound hole 23, and different designs can be performed according to actual needs, that is, L3 > L5 or L3 < L5, which can be realized to avoid serious near field cancellation caused by too close distance between the positive and negative sound holes, and greatly reduce the sound sensitivity received by human ears.

Preferably, in some embodiments of the present utility model, as shown in fig. 6, a distance L3 between center positions of the first sound hole 21 and the second sound hole 22 and a distance L4 between center positions of the third sound hole 23 and the fourth sound hole 24 satisfy the relationship: l3=l5, whereby the sound leakage amount of the far field can be further reduced and the listening effect of the near field can be improved.

In some embodiments of the present utility model, as shown in fig. 7, two sound holes located in the middle in the length direction of the housing 1 are communicated to form a combined sound hole 25, that is, a second sound hole 22 and a third sound hole 23 that originally radiate sound waves with the same phase are combined into one. In this case, during the operation of the sound generating apparatus 100, the sound wave of the first phase is radiated by the first sound hole 21 and the fourth sound hole 24 located at two ends of the length direction of the housing 1, the sound wave of the second phase with opposite polarity is radiated by only the combined sound hole 25, and the sound waves with opposite phases cancel each other in the far field, so as to reduce the leakage volume of the far field. By the arrangement, far-field sound leakage can be reduced, meanwhile, the sound volume of near-field in-ear sound is enhanced, and under the condition that the requirements of far field and near field of a user on sound performance are met, the manufacturing process of the shell 1 of the sound generating device 100 is simplified, so that the sound generating device 100 is simpler in composition structure.

Also, in some embodiments of the present utility model, as shown in fig. 6, the length of extension of the combined sound hole 25 in the longitudinal direction of the housing 1 is L6, the distance between the center positions of the two sound holes located at both ends in the longitudinal direction of the housing 1 is L1, that is, the distance between the center positions of the first sound hole 21 and the fourth sound hole 24 is L1, and the dimensional relationship of L1 and L6 satisfies: l1 is greater than or equal to 2 x L6. Therefore, a large enough distance is reserved between the positive and negative electrode sound holes, sound waves emitted by four sounds Kong Fu are seriously counteracted in a near field due to the fact that the distance between the positive and negative electrode sound holes is too small, the sensitivity of sound received by human ears is greatly reduced, and the sound volume of sound entering the ears is further increased while leakage sound is reduced.

Further, in some embodiments of the present utility model, as shown in fig. 8, two sound holes and a combined sound hole 25 are formed in the casing 1 of the sound generating device 100 and located at two ends of the casing 1, along the length direction of the casing 1, the vertical projection on the horizontal plane is a first side projection sound hole, a combined projection sound hole, and a second side projection sound hole, where a line connecting the center positions of the first side projection sound hole and the combined projection sound hole forms a third line segment, a line connecting the center positions of the second projection sound hole and the combined projection sound hole forms a fourth line segment, and an included angle α between the third line segment and the fourth line segment is greater than or equal to 90 °.

In the embodiment shown in fig. 8, the first side projection sound hole, the combined projection sound hole, and the second side projection sound hole are projection sound holes formed by vertical projections of the first sound hole 21, the combined sound hole 25, and the fourth sound hole 24 in the horizontal plane direction in this order. The third line segment is formed by connecting a first side projection sound hole formed by vertically projecting the first sound hole 21 and the combined sound hole 25 in the horizontal plane direction with the central position of the combined projection sound hole, the fourth line segment is formed by connecting a combined projection sound hole formed by vertically projecting the combined sound hole 25 and the fourth sound hole 24 in the horizontal plane direction with the central position of the second side projection sound hole, the third line segment and the fourth line segment are formed by projecting three sound holes in the same horizontal plane, and an included angle alpha is formed between straight lines where the third line segment and the fourth line segment are located, and alpha is more than or equal to 90 degrees. Therefore, the quadrupole effect of the far field can be ensured, the far-field sound leakage is reduced, and the sound listening effect of the near field can be ensured.

Specifically, when the included angle α between the third line segment and the fourth line segment is smaller and smaller, that is, the distance between the sound holes at the two ends and the combined sound hole 25 in the middle is smaller and smaller, the superposition effect of the sound waves emitted from the sound holes at the two ends and the sound waves emitted from the combined sound hole 25 in the middle is reduced in the far field, so that the sound leakage amount in the far field is increased; meanwhile, the volume of the in-ear sound can be reduced in the near field, and the hearing effect of the user is affected. Alternatively, the included angle α between the third line segment and the fourth line segment may be 90 °, 120 °, 150 °, and so on.

Further, in some embodiments of the present utility model, the third line segment and the fourth line segment may be arranged in a collinear manner, that is, as shown in fig. 8, an included angle α between the third line segment and the fourth line segment is 180 °, so that the sound leakage amount in the far field can be reduced, and meanwhile, the volume of the near field entering the ear is increased, and the listening effect of the near field is improved.

In some embodiments of the present utility model, the double-sided sound generating unit 4 comprises a magnetic circuit system provided with a magnetic gap; the first vibration system and the second vibration system are arranged on two opposite sides of the magnetic circuit system, the first vibration system comprises a first vibrating diaphragm assembly and a first voice coil, the second vibration system comprises a second vibrating diaphragm assembly and a second voice coil, a first front sound cavity 31 is defined between the first vibrating diaphragm assembly and the inner wall of the shell 1, a second front sound cavity 32 is defined between the second vibrating diaphragm assembly and the inner wall of the shell 1, the first voice coil and the second voice coil are arranged on two opposite sides of the magnetic circuit system and are respectively inserted into magnetic gaps, when the double-sided sounding unit 4 works, the first voice coil and the second voice coil are electrified, under the action of a magnetic field generated by the magnetic circuit system, the first vibrating diaphragm and the second vibrating diaphragm are driven to vibrate in a reciprocating mode, the vibrating directions of the first vibrating system and the second vibrating system are the same, namely the vibrating directions of the first vibrating diaphragm and the second vibrating diaphragm are the same, and therefore the phase polarities of sound waves corresponding to the first front sound cavity 31 are guaranteed to be opposite to the phases of sound waves corresponding to the second sound Kong Fu corresponding to the second sound cavity 32, so that the sound leakage effect of the vibrating diaphragm is reduced. By setting the first vibration system and the second vibration system to share the same magnetic circuit system, the thickness of the double-sided sounding unit 4 can be reduced, thereby being beneficial to realizing the thinning of the sounding device 100 and reducing the occupation of the internal space of the terminal.

Further, in some embodiments of the present utility model, the double-sided sound generating unit 4 includes: the first sound generation unit comprises a first magnetic circuit system and a first vibration system, the first magnetic circuit system is provided with a first magnetic gap, the first vibration system comprises a first vibrating diaphragm assembly and a first voice coil, the first voice coil is inserted into the first magnetic gap, and a first front sound cavity 31 is defined between the first vibrating diaphragm assembly and the inner wall of the shell 1; the second sound production monomer, the second sound production monomer sets up with first sound production monomer dorsad, and the second sound production monomer includes second magnetic circuit and second vibration system, and second magnetic circuit sets up and is equipped with the second magnetic gap with first magnetic circuit dorsad, and second vibration system includes second vibrating diaphragm subassembly and second voice coil loudspeaker voice coil, and the second voice coil is inserted and is located in the second magnetic gap, and second vibrating diaphragm subassembly and the inner wall of shell 1 between define second preceding acoustic cavity 32. That is, the double-sided sound generating unit 4 can be formed by combining two single-sided sound generating monomers in a back-to-back manner, besides adopting the design that two sets of vibration systems share the same magnetic circuit system, in the working process of the double-sided sound generating unit 4, the sound wave phases generated by the first sound generating monomer and the second sound generating monomer are opposite in polarity, so that the sound wave phases emitted by two sound holes corresponding to the first sound generating monomer and two sound Kong Fu corresponding to the second sound generating monomer and communicated with the first front sound cavity 31 and the second front sound cavity 32 are opposite in polarity, a quadrupole effect is formed in a far field, and the sound leakage is reduced. So set up, will be two single face sound production monomer back to the setting and form two-sided sound production unit 4, can realize that two-sided sound production unit 4 is simple and convenient more in preparation process.

The wearable device according to the embodiment of the second aspect of the present utility model includes the sound emitting apparatus 100 according to the embodiment of the first aspect of the present utility model described above. The wearable device of the second aspect of the embodiments of the present utility model may include, but is not limited to, AR, VR, or earphone devices.

According to the wearing equipment of the second aspect of the present utility model, by arranging the sounding device 100 of the above embodiment, that is, by arranging four sound holes arranged at intervals along the length direction of the housing 1 in the housing 1 of the sounding device 100 adopting the double-sided sounding unit 4, sound waves emitted by the four sound holes form a quadrupole effect in the far field, thereby greatly reducing far-field leakage of the wearing equipment, enhancing the volume of in-ear sound, greatly protecting the privacy of a user, and further improving the user experience.

It should be noted that, the foregoing is only a preferred embodiment of the present utility model, and not intended to limit the scope of the present utility model, and all the equivalent structural changes made by the present utility model and the contents of the drawings under the inventive concept of the present utility model, or the direct/indirect application in other related technical fields are included in the scope of the present utility model.

Claims (13)

1. A sound emitting device, comprising:

the shell is internally provided with a cavity;

the double-sided sound generating unit is arranged in the cavity, the double-sided sound generating unit is matched with the shell to define a first front sound cavity, a second front sound cavity and a rear sound cavity in the cavity, four sound holes communicated with the cavity are formed in the shell, two sound holes are respectively communicated with the first front sound cavity, and the other two sound holes are respectively communicated with the second front sound cavity;

the four sound holes are distributed at intervals along the length direction of the shell, the sound wave phases emitted by the two sound holes at two ends are first phases, the sound wave phases emitted by the two sound holes in the middle are second phases, the polarities of the first phases and the second phases are opposite, and the sound waves emitted by the two sound holes at two ends and the sound waves emitted by the two sound holes in the middle form a quadrupole effect in a far field.

2. The sound generating apparatus according to claim 1, wherein four sound holes are formed by vertical projection of four sound holes on a horizontal plane, and along a length direction of the housing, the four sound holes are a first sound hole, a second sound hole, a third sound hole and a fourth sound hole in sequence, wherein a first line segment is formed by connecting central positions of the first sound hole and the second sound hole, a second line segment is formed by connecting central positions of the third sound hole and the fourth sound hole, and an included angle θ between the first line segment and the second line segment is equal to or greater than 90 °.

3. The sound emitting apparatus of claim 2 wherein the first line segment and the second line segment are disposed co-linearly.

4. The sound generating apparatus according to claim 1, wherein a distance between center positions of two of the sound holes at both ends is L1, and a distance between center positions of two of the sound holes at the middle is L2, L1 being equal to or larger than 2 x L2.

5. The sound generating apparatus according to claim 1, wherein four of the sound holes are a first sound hole, a second sound hole, a third sound hole, and a fourth sound hole in this order along a length direction of the housing, a pitch between a center position of the first sound hole and the second sound hole is L3, a pitch between a center position of the second sound hole and the third sound hole is L4, and a pitch between a center position of the third sound hole and the fourth sound hole is L5, L4 < L3, and L4 < L5.

6. The sound emitting device of claim 5, wherein a spacing L3 between the center positions of the first sound hole and the second sound hole and a spacing L5 between the center positions of the third sound hole and the fourth sound hole satisfy the relationship: l3=l5.

7. The sound emitting apparatus of claim 1 wherein two of said sound holes in the middle communicate to form a combined sound hole.

8. The sound generating apparatus according to claim 7, wherein the combined sound hole has an extension length L6 along the length direction of the housing, and a distance L1 is equal to or greater than 2 x L6 between the center positions of the two sound holes at both ends.

9. The sound generating apparatus according to claim 7, wherein perpendicular projections of the two sound holes at both ends and the combined sound hole on a horizontal plane form a first side projection sound hole, a combined projection sound hole and a second side projection sound hole, respectively, wherein a line connecting the first side projection sound hole and a central position of the combined projection sound hole forms a third line segment, a line connecting the second side projection sound hole and a central position of the combined projection sound hole forms a fourth line segment, and an included angle α between the third line segment and the fourth line segment is equal to or greater than 90 °.

10. The sound emitting device of claim 9, wherein the third line segment and the fourth line segment are disposed co-linearly.

11. The sound emitting apparatus of any one of claims 1-10, wherein the double sided sound emitting unit comprises:

the magnetic circuit system is provided with a magnetic gap;

the first vibrating system and the second vibrating system are arranged on two opposite sides of the magnetic circuit system, the first vibrating system comprises a first vibrating diaphragm assembly and a first voice coil, the second vibrating system comprises a second vibrating diaphragm assembly and a second voice coil, a first front sound cavity is defined between the first vibrating diaphragm assembly and the inner wall of the shell, a second front sound cavity is defined between the second vibrating diaphragm assembly and the inner wall of the shell, and the first voice coil and the second voice coil are positioned on two opposite sides of the magnetic circuit system and are all inserted into the magnetic gap, and the vibrating directions of the first vibrating system and the second vibrating system are the same.

12. The sound emitting apparatus of any one of claims 1-10, wherein the double sided sound emitting unit comprises:

the first sound generation unit comprises a first magnetic circuit system and a first vibration system, wherein the first magnetic circuit system is provided with a first magnetic gap, the first vibration system comprises a first vibrating diaphragm assembly and a first voice coil, the first voice coil is inserted into the first magnetic gap, and a first front sound cavity is defined between the first vibrating diaphragm assembly and the inner wall of the shell;

the second sound production monomer, the second sound production monomer with first sound production monomer is set up dorsad, the second sound production monomer includes second magnetic circuit and second vibration system, second magnetic circuit with first magnetic circuit is set up and is equipped with the second magnetic gap dorsad, second vibration system includes second vibrating diaphragm subassembly and second voice coil loudspeaker voice coil, the second voice coil loudspeaker voice coil is inserted and is located in the second magnetic gap, the second vibrating diaphragm subassembly with inject between the inner wall of shell the preceding sound cavity of second.

13. A wearable device comprising the sound emitting apparatus according to any one of claims 1-12.

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