Loudspeaker structure with ultrasonic function

Abstract

The utility model belongs to the technical field of loudspeakers, and discloses a loudspeaker structure with an ultrasonic function, which comprises a magnetic loop structure, a voice coil, a vibrating diaphragm and a waveguide cover. The magnetic loop structure is provided with an accommodating groove; the voice coil is arranged in the accommodating groove, and the voice coil can do reciprocating motion in the first direction when alternating current passes through the voice coil; the vibrating diaphragm is arranged at the opening of the accommodating groove and is fixedly connected to the voice coil, and the vibrating diaphragm can be driven by the voice coil to deform along a first direction; the waveguide cover is fixedly arranged on one side of the diaphragm away from the voice coil. The voice coil reciprocates in the containing groove under the action of alternating current and a magnetic field, so that the vibrating diaphragm is driven to reciprocate together, gas in the front cavity generates resonance, energy is gathered at the expected frequency, ultrasonic waves are transmitted out from the middle hole of the waveguide cover, the material consumption is low, the cost is low, and meanwhile, the energy-saving and environment-friendly effects are achieved. The device can be installed on some relatively flat electronic products, such as televisions, tablet personal computers and mobile phones.

Description

TECHNICAL FIELD

[0001] The utility model relates to a loudspeaker technical field especially, it relates to a loudspeaker structure with ultrasonic function. BACKGROUND

[0002] With the development of large screen intelligent equipment (such as television, mobile phone etc.), the front cavity for side sound is usually set, and the frequency response of ultrasonic frequency band will be seriously attenuated due to structural limitation, so that the application of product ultrasonic function cannot be realized.

[0003] Although the full-frequency loudspeaker and high-frequency loudspeaker in the prior art can realize ultrasonic function, special design is needed, and sometimes the performance of audible frequency band (20-20kHz) is sacrificed and the cost of product is increased. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a loudspeaker structure with ultrasonic function, which can meet the performance requirement of audible frequency and the requirement of product ultrasonic function.

[0005] To achieve this purpose, the utility model adopts the following technical scheme:

[0006] The loudspeaker structure with ultrasonic function comprises:

[0007] A magnetic circuit structure is provided with a containing groove, and a magnetic field circuit is arranged in the containing groove.

[0008] An audio coil is arranged in the containing groove, and the audio coil can reciprocate in a first direction when alternating current passes through the audio coil.

[0009] A diaphragm is arranged at the opening of the containing groove and is fixedly connected to the audio coil, and the diaphragm can be deformed along the first direction under the driving of the audio coil.

[0010] A waveguide cover is fixedly arranged on the side of the diaphragm away from the audio coil, the waveguide cover is in the form of a circular ring with an outer diameter of 5mm-15mm, the waveguide cover and the diaphragm form a front cavity, the diaphragm can drive the gas in the front cavity to resonate, generate ultrasonic waves and emit the ultrasonic waves from the center hole of the waveguide cover.

[0011] Preferably, the magnetic circuit structure comprises:

[0012] A magnetic conducting bowl is arranged inside the containing groove.

[0013] A magnetic steel is configured as a permanent magnet.

[0014] A magnetic conducting sheet is fixedly arranged in the containing groove, one side of the magnetic steel is fixedly connected to the groove bottom of the containing groove, and the other side is fixedly connected to the magnetic conducting sheet.

[0015] Preferably, the opening of the accommodating groove is circular, the magnetic conducting sheet is cylindrical, the radius of the magnetic conducting sheet is smaller than the opening radius of the accommodating groove, and the voice coil is located between the magnetic conducting sheet and the inner wall of the accommodating groove.

[0016] Preferably, the material of the magnetic conducting bowl and the magnetic conducting sheet is low-carbon steel.

[0017] Preferably, the magnetic steel is a rare-earth magnet.

[0018] Preferably, the loudspeaker further comprises a cement configured to bond the voice coil to the diaphragm.

[0019] Preferably, the cement is acrylate.

[0020] Preferably, the loudspeaker further comprises a fixing ring, and the diaphragm comprises:

[0021] a fixed part in the form of a circular ring, the fixing ring being configured to press the fixed part against the opening of the accommodating groove;

[0022] a vibrating part connected to the inner circumferential side of the fixed part.

[0023] Preferably, the material of the fixing ring is brass.

[0024] The loudspeaker structure has the following advantages:

[0025] The waveguide cover is in the form of a circular ring with an outer diameter of 5-15 mm, so that the size of the loudspeaker structure is small enough, and only the FR (frequency response curve) requirement needs to be met without considering the THD (total harmonic distortion) and RB (return loss ratio) of audible frequency, and the waveguide cover and the diaphragm cooperate with each other to form a front cavity, the voice coil reciprocates in the accommodating groove under the action of alternating current and magnetic field, thereby driving the diaphragm to reciprocate, so that the gas in the front cavity resonates, thereby gathering energy at the expected frequency, and the ultrasonic waves are propagated out of the middle hole of the waveguide cover, and the loudspeaker structure is small in size, low in cost, and can be installed in some relatively flat electronic products, such as televisions, tablet computers, and mobile phones. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is an exploded view of the loudspeaker structure with an ultrasonic function in the first direction according to the present application;

[0027] Figure 2 is a structural schematic view of the loudspeaker with an ultrasonic function according to the present application;

[0028] Figure 3 is Figure 2Structure sectional view in A-A direction.

[0029] In the figure:

[0030] 1. Magnetic circuit structure; 10. Housing groove; 11. Magnetic conducting bowl; 12. Magnetic steel; 13. Magnetic conducting sheet;

[0031] 2. Voice coil;

[0032] 3. Diaphragm; 31. Fixed part; 32. Vibration part;

[0033] 4. Waveguide cover; 40. Front cavity; 41. Middle hole;

[0034] 5. Cement;

[0035] 6. Fixed ring. DETAILED DESCRIPTION

[0036] The embodiments of the present application are described in detail below, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar components having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and should not be understood as limiting the present application.

[0037] In the description of the present application, unless explicitly defined and limited otherwise, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0038] In the description of the present application, unless explicitly defined and limited otherwise, the first feature "on" or "below" the second feature can include that the first feature and the second feature are in direct contact, or that the first feature and the second feature are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0039] The technical scheme of the present application is further illustrated below by combining the drawings and through the specific embodiments.

[0040] As Figures 1-3The utility model provides a loudspeaker structure with ultrasonic function for emitting ultrasonic signal, which comprises a magnetic circuit structure 1, a voice coil 2, a diaphragm 3 and a waveguide cover 4. The magnetic circuit structure 1 is provided with a receiving groove 10, and a magnetic field circuit is arranged in the receiving groove 10. The voice coil 2 is arranged in the receiving groove 10, and can reciprocate in the first direction when an alternating current passes through the voice coil 2. The diaphragm 3 is arranged at the opening of the receiving groove 10 and is fixedly connected to the voice coil 2. The diaphragm 3 can be deformed in the first direction under the driving of the voice coil 2. The waveguide cover 4 is fixedly arranged on the side of the diaphragm 3 away from the voice coil 2. The waveguide cover 4 is in the form of a circular ring with an outer diameter of 5-15 mm. The waveguide cover 4 and the diaphragm 3 form a front cavity 40. The diaphragm 3 can drive the gas in the front cavity 40 to resonate, generate ultrasonic waves and emit the ultrasonic waves from the middle hole 41 of the waveguide cover 4.

[0041] The waveguide cover 4 is in the form of a circular ring with an outer diameter of 5-15 mm, so that the size of the loudspeaker structure is small enough. The performance of THD (total harmonic distortion), RB (return loss ratio) and the like of audible frequency need not be considered, and only the FR (frequency response curve) requirement needs to be met. The waveguide cover 4 and the diaphragm 3 cooperate with each other to form the front cavity 40. The voice coil 2 reciprocates in the receiving groove 10 under the action of the alternating current and the magnetic field, thereby driving the diaphragm 3 to reciprocate, so that the gas in the front cavity 40 resonates, thereby gathering energy at the expected frequency, and the ultrasonic waves are propagated from the middle hole 41 of the waveguide cover 4. At the same time, the volume is small enough, the material is less, the cost is low, and the loudspeaker structure can be installed in some relatively flat electronic products, such as televisions, tablet computers and mobile phones.

[0042] It should be noted that the voice coil 2 is a coil structure wound by a wire.

[0043] Specifically, the height of the loudspeaker structure with ultrasonic function in the first direction is not higher than 5 mm.

[0044] Specifically, the magnetic circuit structure 1 comprises a magnetic conductive bowl 11, a magnetic steel 12 and a magnetic conductive sheet 13. The receiving groove 10 is arranged inside the magnetic conductive bowl 11. The magnetic steel 12 is configured as a permanent magnet. The magnetic conductive sheet 13 is fixedly arranged in the receiving groove 10. One side of the magnetic steel 12 is fixedly connected to the groove bottom of the receiving groove 10, and the other side is fixedly connected to the magnetic conductive sheet 13.

[0045] For example, in the embodiment, the material of the magnetic conductive bowl 11 and the magnetic conductive sheet 13 is low-carbon steel. The above-mentioned low-carbon steel is a prior art disclosed in the art, and its specific components and structure are not described here.

[0046] In other embodiments, the magnetic conductive bowl 11 and the magnetic conductive sheet 13 can also use other materials capable of conducting a magnetic field, which are not described here.

[0047] Exemplarily, in the embodiment, the magnetic steel 12 is a ferrite magnetic steel, which has low manufacturing cost, strong machinability and excellent magnetic performance.

[0048] In other embodiments, the magnetic steel 12 can also use other permanent magnets, which are not described here.

[0049] More specifically, the opening of the accommodating groove 10 is circular, the magnetic conducting sheet 13 is cylindrical, the radius of the magnetic conducting sheet 13 is smaller than the opening radius of the accommodating groove 10, and the voice coil 2 is located between the magnetic conducting sheet 13 and the inner wall of the accommodating groove 10. The above-mentioned setting makes the current direction inside the voice coil 2 perpendicular to the magnetic induction line direction of the magnetic field in the accommodating groove 10, so that the voice coil 2 can reciprocate under the action of the alternating current and the ampere force exerted by the magnetic field.

[0050] Specifically, the loudspeaker structure with ultrasonic function further comprises a cement 5 configured to bond the voice coil 2 to the diaphragm 3. The above-mentioned cement 5 makes the diaphragm 3 vibrate under the driving of the voice coil 2, improves the connection strength of the two, and prevents separation.

[0051] Exemplarily, in the embodiment, the cement 5 is acrylate. Acrylate is a common prior art in the art, and its specific components are not described here. In other embodiments, other materials can also be used as the cement 5, which is not specifically limited here.

[0052] Specifically, the loudspeaker structure with ultrasonic function further comprises a fixing ring 6, and the diaphragm 3 comprises a fixed part 31 and a vibrating part 32. The fixed part 31 is annular, and the fixing ring 6 is configured to press the fixed part 31 against the opening of the accommodating groove 10; the vibrating part 32 is connected to the inner circumferential side of the fixed part 31. The above-mentioned fixing ring 6 presses the fixed part 31 against the magnetic conducting bowl 11, preventing the deformation of the diaphragm 3 from being too large.

[0053] Exemplarily, in the embodiment, the material of the fixing ring 6 is brass, which is not magnetically conductive and has a large enough density. In other embodiments, the fixing ring 6 can also use other non-magnetic materials.

[0054] Obviously, the above-mentioned embodiments of the utility model are only examples for clearly explaining the utility model, and are not a limitation on the embodiments of the utility model. For ordinary skilled persons in the art, other different forms of changes or variations can be made on the basis of the above-mentioned description. Here, it is not necessary and impossible to exhaust all the embodiments. Any modification, equivalent replacement and improvement made within the spirit and principle of the utility model should be included in the protection scope of the utility model claim.

Claims

1. A speaker structure having an ultrasonic function, characterized by comprising: The application relates to a magnetic circuit structure (1) provided with a containing groove (10) in which a magnetic field circuit is arranged; an audio coil (2) arranged in the containing groove (10) and capable of reciprocating in a first direction when an alternating current is passed through the audio coil (2); a diaphragm (3) arranged at an opening of the containing groove (10) and fixedly connected to the audio coil (2), the diaphragm (3) being capable of deforming along the first direction under the driving of the audio coil (2); and a waveguide cover (4) fixedly arranged on a side of the diaphragm (3) away from the audio coil (2), the waveguide cover (4) being in the shape of a ring with an outer diameter of 5-15 mm, the waveguide cover (4) and the diaphragm (3) surrounding the waveguide cover (4) to form a front cavity (40), the diaphragm (3) being capable of driving the gas in the front cavity (40) to resonate and generate ultrasonic waves and emit the ultrasonic waves from a middle hole (41) of the waveguide cover (4). The magnetic circuit structure (1) comprises a magnetic conducting bowl (11), the containing groove (10) being arranged inside the magnetic conducting bowl (11); a magnetic steel (12) configured as a permanent magnet; and a magnetic conducting sheet (13) fixedly arranged in the containing groove (10), the magnetic steel (12) being fixedly connected to a groove bottom of the containing groove (10) on one side and fixedly connected to the magnetic conducting sheet (13) on the other side. The opening of the containing groove (10) is circular, the magnetic conducting sheet (13) is in the shape of a cylinder, the radius of the magnetic conducting sheet (13) is smaller than the opening radius of the containing groove (10), and the audio coil (2) is located between the magnetic conducting sheet (13) and the inner wall of the containing groove (10). The magnetic conducting bowl (11) and the magnetic conducting sheet (13) are made of low-carbon steel. The magnetic steel (12) is a rubidium-iron-boron magnetic steel.

2. The speaker structure with an ultrasonic function according to claim 1, characterized by, The application further comprises a cementing material (5) configured to bond the audio coil (2) to the diaphragm (3). The cementing material (5) is acrylate. The application further comprises a fixing ring (6), the diaphragm (3) comprising a fixed part (31) in the shape of a ring, the fixing ring (6) being configured to press the fixed part (31) against the opening of the containing groove (10); and a vibrating part (32) connected to the inner circumferential side of the fixed part (31). The fixing ring (6) is made of brass.

3. The speaker structure with an ultrasonic function according to claim 2, characterized by, ​ 4. The speaker structure with an ultrasonic function according to claim 2, characterized by, ​ 5. The speaker structure with an ultrasonic function according to claim 2, characterized by, ​ 6. The speaker structure with an ultrasonic function according to claim 1, characterized by, ​ 7. The speaker structure with an ultrasonic function according to claim 6, characterized by, ​ 8. The speaker structure with an ultrasonic function according to claim 1, characterized by, ​ ​ ​ 9. The speaker structure with an ultrasonic function according to claim 8, characterized by, ​

Images