Speaker and electronic device

Abstract

The present invention provides a speaker and electronic device, the speaker including a counterweight, a lower housing arranged in order, an intermediate housing, an electric vibrating piece, and a dome, the lower housing, the intermediate housing, and the electric vibrating piece being assembled to form an accommodating cavity, the counterweight being arranged in the accommodating cavity and connected to a first surface of the electric vibrating piece, the dome being arranged on a second surface of the electric vibrating piece opposite to the counterweight, and when a voltage is applied to the electric vibrating piece, the electric vibrating piece drives the dome to move.

Description

Cross - reference to related applications

[0001] This application claims the priority of Chinese Patent Application No. 202010362949.1, filed in China on April 30, 2020, and all of its contents are incorporated herein by reference.

Technical Field

[0002] The present invention relates to the field of electronic devices, and particularly to speakers and electronic equipment.

Background Art

[0003] Currently, mainstream speakers are realized based on the principle that when a current - carrying conductor passes through a magnetic field, a force perpendicular to the directions of the current and the magnetic field is applied, and the magnitude of the force is proportional to the current, the length of the wire, and the magnetic flux density. A speaker includes a magnetic steel, a voice coil, and a diaphragm. When an alternating current is input to the voice coil, an alternating driving force is applied to the voice coil, generating an alternating motion to vibrate the diaphragm, repeatedly pushing the air to produce sound from the speaker. Since the speaker includes a magnetic steel and a coil, the magnetic field generated by the magnetic steel and the coil will interfere with the devices around the speaker.

Summary of the Invention

Problems to be Solved by the Invention

[0004] Embodiments of the present invention provide a speaker and an electronic device to solve the problem that the magnetic field generated by the magnetic steel and coil of the current speaker interferes with the devices around the speaker. To solve the above problems, the embodiments of the present invention are realized as follows.

Means for Solving the Problems

[0005] Embodiments of the present invention include a counterweight, a lower housing, an intermediate housing, an electric vibrating piece, and a dome provided in sequence. The lower housing, the intermediate housing, and the electric vibrating piece are assembled to form an accommodation cavity, and the counterweight is provided in the accommodation cavity and connected to a first surface of the electric vibrating piece. The dome is provided on a second surface of the electric vibrating piece opposite to the counterweight. When a voltage is applied to the electric vibrating piece, the electric vibrating piece drives the dome to move, providing a speaker.

[0006] Furthermore, the electric vibrating piece is a ring-shaped structural member provided with a first through hole, and the dome may cover the first through hole.

[0007] Furthermore, the counterweight is a ring-shaped structural member provided with a second through hole, and the first through hole and the second through hole may be arranged opposite to each other.

[0008] Furthermore, the electric vibrating piece is an ion conductive vibrating piece. Guide When the voltage applied to the ion conductive vibrating piece is a first voltage, the ion conductive vibrating piece drives the dome to move in a first direction. When the voltage applied to the ion conductive vibrating piece is a second voltage, the ion conductive vibrating piece drives the dome to move in a second direction. The first voltage and the second voltage have opposite polarities, and the first direction may be opposite to the second direction. When the voltage applied to the ion conductive vibrating piece is a first voltage, the ion conductive vibrating piece drives the dome to move a first distance in the first direction.

[0009] When the voltage applied to the ion conductive vibrating piece is a third voltage, the ion conductive vibrating piece drives the dome to move a second distance in the first direction. When the voltage applied to the ion conductive vibrating piece is a third voltage, the ion conductive vibrating piece drives the dome to move a second distance in the first direction. The first voltage and the third voltage have the same polarity, the third voltage is greater than the first voltage, and the first distance and the second distance may be different.

[0010] Furthermore, when the voltage applied to the ion-conductive vibrating piece is the first voltage, the ion-conductive vibrating piece is driven to move the dome in the first direction at a first speed. When the voltage applied to the ion-conductive vibrating piece is the third voltage, the ion-conductive vibrating piece is driven to move the dome in the first direction at a second speed. The first voltage and the third voltage have the same polarity, the third voltage is greater than the first voltage, and the first speed and the second speed may be different.

[0011] Furthermore, the electric vibrating piece has a first region, a second region, and a third region. The counterweight is provided in the first region of the electric vibrating piece, the electric vibrating piece is connected to the intermediate housing via the second region, and the third region is located between the first region and the second region. The third region of the electric vibrating piece may be recessed in the direction toward the lower housing, or the third region of the electric vibrating piece may be recessed in the direction opposite to the lower housing.

[0012] Furthermore, a third through-hole is provided in the intermediate housing, and there may be a gap between the counterweight and the intermediate housing.

[0013] Furthermore, the third through-hole is a counterbore hole, the counterbore of the counterbore hole is located at the end of the intermediate housing away from the dome, and in the moving direction of the dome, the projections of both the dome and the counterweight may be within the projection of the counterbore hole.

[0014] Furthermore, the height of the counterweight may be greater than half of the height of the counterbore, or the height of the counterweight may be smaller than the height of the counterbore.

[0015] Furthermore, the speaker may further include a diaphragm holder that is provided around the electric diaphragm, and the electric diaphragm may be fixedly connected to the intermediate housing via the diaphragm holder.

[0016] An embodiment of the present invention further provides an electronic device including the above-described speaker.

Effects of the Invention

[0017] In an embodiment of the present invention, a speaker includes a counterweight, a lower housing, an intermediate housing, an electric diaphragm, and a dome provided in this order. The lower housing, the intermediate housing, and the electric diaphragm are assembled to form an accommodation cavity. The counterweight is provided in the accommodation cavity and connected to a first surface of the electric diaphragm. The dome is provided on a second surface of the electric diaphragm opposite to the counterweight. When a voltage is applied to the electric diaphragm, the electric diaphragm drives the dome to move. In the structure of the above speaker, since the magnetic steel and coil structure are eliminated, magnetic field interference to circuits and devices around the speaker is avoided, and the operating environment of circuits and devices around the speaker can be made clean. In addition, the above speaker has a simple structure, occupies a small space, and can further meet the demand for thinning of electronic devices.

Brief Description of the Drawings

[0018]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

DETAILED DESCRIPTION OF THE INVENTION

[0019] Hereinafter, with reference to the accompanying drawings in the embodiments of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative labor are included in the protection scope of the present invention.

[0020] Referring to FIGS. 1-3, this embodiment includes a counterweight 1, a lower housing 2, an intermediate housing 3, an electric vibrating piece 4, and a dome 5 provided in sequence. The lower housing 2, the intermediate housing 3, and the electric vibrating piece 4 are assembled to form a receiving cavity. The counterweight 1 is provided in the receiving cavity and connected to a first surface of the electric vibrating piece 4. The dome 5 is provided on a second surface of the electric vibrating piece 4 opposite to the counterweight 1. When a voltage is applied to the electric vibrating piece 4, the electric vibrating piece 4 drives to move the dome 5, providing a speaker.

[0021] In the above structure, the lower housing 2, the intermediate housing 3, and the electric vibrating piece 4 are assembled to form a receiving cavity, and the counterweight 1 is provided in the receiving cavity and connected to the first surface of the electric vibrating piece 4. For example, the counterweight 1 may be adhered to the first surface using an adhesive so as to suspend the counterweight 1 in the receiving cavity. Thereby, when the electric vibrating piece 4 drives the dome 5 to move, the counterweight 1 also moves together with the dome 5, and the counterweight 1 is used to adjust the resonance frequency of the speaker. When a voltage is applied to the electric vibrating piece 4, the electric vibrating piece 4 drives the dome 5 to move, and the air around the dome 5 can be vibrated to produce sound.

[0022] In this embodiment, the speaker includes a counterweight 1, a lower housing 2, an intermediate housing 3, an electric vibrating piece 4, and a dome 5 provided in sequence. The lower housing 2, the intermediate housing 3, and the electric vibrating piece 4 are assembled to form a receiving cavity. The counterweight 1 is provided in the receiving cavity and connected to the first surface of the electric vibrating piece 4. The dome 5 is provided on the second surface of the electric vibrating piece 4 opposite to the counterweight 1. When a voltage is applied to the electric vibrating piece 4, the electric vibrating piece 4 drives the dome 5 to move. In the structure of the speaker in this embodiment, since there is no magnetic steel and coil structure, magnetic field interference to the circuits and devices around the speaker is avoided, and the operating environment of the circuits and devices around the speaker can be made clean. In addition, the speaker in this embodiment has a simple structure, a small occupied space, and can better meet the requirement of thinning of electronic devices.

[0023] Furthermore, the electric vibrating piece 4 is an ion transmission GuideIt is an ion-conductive vibrating piece. When the voltage applied to the ion-conductive vibrating piece is a first voltage, the ion-conductive vibrating piece drives the dome 5 to move in a first direction. When the voltage applied to the ion-conductive vibrating piece is a second voltage, the ion-conductive vibrating piece drives the dome 5 to move in a second direction. The first voltage and the second voltage have opposite polarities, and the first direction is opposite to the second direction, that is, the first direction and the second direction are opposite to each other. By alternately applying voltages of opposite polarities to the ion-conductive vibrating piece, the ion-conductive vibrating piece is driven to alternately move the dome 5 in the first direction and the second direction, and the air around the dome 5 can be vibrated to produce sound.

[0024] Ion conduction Guide The ion-conductive vibrating piece is an actuating element made of a composite material such as an actuating element made of a soft polymer. Optionally, the ion-conductive vibrating piece includes a first electrode layer, an ion exchange resin layer, and a second electrode layer laminated in sequence, and has a polymer electrolyte inside the ion exchange resin layer.

[0025] Ion conduction Guide The first electrode layer and the second electrode layer can be formed on two opposite surfaces of the ion exchange resin by electroless copper plating or gold plating, etc. Also, the displacement performance can be improved by increasing the surface area of the electrodes. By applying a voltage to the vibrating piece 4, the cations in the polymer electrolyte move to the cathode side, and a difference in swelling occurs between the front and back surfaces of the vibrating piece 4. Due to this difference, strain occurs in the vibrating piece 4, and by alternately changing the direction of the voltage applied to the vibrating piece 4, the strain direction of the vibrating piece 4 can be alternately changed to generate vibration. The amplitude of the vibration may be 0.1 mm to 10 mm, and it can be controlled by setting the thickness of the vibrating piece 4 and adjusting the magnitude of the current flowing through the vibrating piece 4.

[0026] Figure 4 is a schematic diagram showing the distribution of cations in the vibrating piece 4 when a current in the positive direction is passed through the vibrating piece 4. The cations move to the cathode side of the vibrating piece 4 (i.e., the lower side of the vibrating piece 4 in Figure 4), and the vibrating piece 4 moves upward, thereby moving the dome 5 upward. In Figure 4, A indicates the moving direction of the vibrating piece 4.

[0027] Figure 5 is a schematic diagram showing the distribution of cations in the vibrating piece 4 when a current in the negative direction is passed through the vibrating piece 4. The cations move to the cathode side of the vibrating piece 4 (i.e., the upper side of the vibrating piece 4 in Figure 5), and the vibrating piece 4 moves downward, thereby moving the dome 5 downward. In Figure 5, B indicates the moving direction of the vibrating piece 4.

[0028] Ion conduction Guide By applying a voltage to the ion-conductive vibrating piece, the cations in the polymer electrolyte of the ion-conductive vibrating piece move to the cathode side, resulting in a difference in swelling between the front and back surfaces, and causing strain in the ion-conductive vibrating piece. Guide When an alternating current is applied to the ion-conductive vibrating piece, the ion-conductive vibrating piece vibrates the dome 5 back and forth, thereby vibrating the air around the dome 5 to produce sound. Guide Ion conduction Guide For example, in a scenario where it is necessary to monitor the heat dissipation of an electronic device, the temperature is monitored by a temperature sensor inside the electronic device. When the temperature reaches the temperature point at which heat dissipation should occur, the electronic device outputs a low-power electrical signal of approximately 0.05 W to the vibrating piece 4. The energized vibrating piece 4 vibrates back and forth, vibrating the surrounding area to produce sound, thereby informing the user that the temperature of the electronic device is high and heat dissipation is required, and avoiding damage to the device. Guide In a scenario where automatic heat dissipation is required, the temperature is monitored by a temperature sensor inside the electronic device. When the temperature reaches the temperature point at which heat dissipation should occur, the electronic device outputs a low-power electrical signal of approximately 0.05 W to the vibrating piece 4. The energized vibrating piece 4 vibrates back and forth, vibrating the surrounding area to produce sound and flowing the surrounding air to dissipate heat.

[0029]

[0030]

[0031] ​​Furthermore, when the voltage applied to the ion-conductive vibrating piece is the first voltage, the ion-conductive vibrating piece drives the dome 5 to move in the first direction by a first distance. When the voltage applied to the ion-conductive vibrating piece is the third voltage, the ion-conductive vibrating piece drives the dome 5 to move in the first direction by a second distance. The first voltage and the third voltage have the same polarity, the third voltage is greater than the first voltage, the first distance and the second distance are different, and for example, the second distance may be greater than the first distance. When it is necessary to move the dome 5 greatly, the dome 5 can be moved greatly by applying a high voltage to the ion-conductive vibrating piece. When it is necessary to move the dome 5 slightly, the dome 5 can be moved slightly by applying a low voltage to the ion-conductive vibrating piece. There is a correspondence relationship between the magnitude of the voltage applied to the ion-conductive vibrating piece and the moving distance of the dome 5. When the distance that the dome 5 should move is determined, based on this correspondence relationship, the magnitude of the voltage applied to the ion-conductive vibrating piece can be determined. Of course, in other embodiments of the present invention, the second distance may be smaller than the first distance.

[0032] Furthermore, when the voltage applied to the ion-conductive vibrating piece is the first voltage, the ion-conductive vibrating piece drives the dome 5 to move in the first direction at a first speed. When the voltage applied to the ion-conductive vibrating piece is the third voltage, the ion-conductive vibrating piece drives the dome 5 to move in the first direction at a second speed. The first voltage and the third voltage have the same polarity, the third voltage is greater than the first voltage, and the first speed and the second speed are different. For example, the second speed may be smaller than the first speed. When it is necessary to increase the moving speed of the dome 5, the dome 5 can be moved at a high speed by applying a high voltage to the ion-conductive vibrating piece. When it is necessary to decrease the moving speed of the dome 5, the ion-con Guide ductive vibrating piece can be made to move at a low speed by applying a low voltage to the ion-conductive vibrating piece. When it is necessary to decrease the moving speed of the dome 5, the ion-con GuideBy applying a low voltage to the ionic vibration piece, the dome 5 can be moved at a low speed. Of course, in other embodiments of the present invention, the second speed may be greater than the first speed. In the present invention, there is a correspondence between the magnitude of the voltage applied to the ionic vibration piece and the moving speed of the dome 5. When the speed at which the dome 5 should move is determined, based on this correspondence, the magnitude of the voltage applied to the ionic vibration piece can be determined. Guide There is a correspondence between the magnitude of the voltage applied to the ionic vibration piece and the moving speed of the dome 5. When the speed at which the dome 5 should move is determined, based on this correspondence, the magnitude of the voltage applied to the ionic vibration piece can be determined. Guide There is a correspondence between the magnitude of the voltage applied to the ionic vibration piece and the moving speed of the dome 5. When the speed at which the dome 5 should move is determined, based on this correspondence, the magnitude of the voltage applied to the ionic vibration piece can be determined.

[0033] The speaker may include two operating modes: an acoustic generation mode and a vibration mode. In the acoustic generation mode, the voltage applied to the ion conductive vibration piece may be a fourth voltage whose polarity alternates. The fourth voltage has a high voltage value and drives the dome 5 to move rapidly to realize high-frequency vibration of the dome 5, so that the air around the dome 5 can be vibrated to produce sound. In the vibration mode, the voltage applied to the ion conductive vibration piece may be a fifth voltage whose polarity alternates. The fifth voltage has a small voltage value and drives the dome 5 to move to realize low-frequency vibration of the dome 5, so that it can also be used as a vibration motor.

[0034] As shown in FIG. 1, the lower housing 2 and the intermediate housing 3 are fixedly connected, specifically, they can be connected by welding. The lower housing 2 and the intermediate housing 3 function as a support. As shown in FIG. 2, the electric vibration piece 4 is a ring-shaped structural member provided with a first through hole, and the dome 5 covers the first through hole. The electric vibration piece 4 and the dome 5 may be detachably connected. For example, by adhering the electric vibration piece 4 to the dome 5 with an adhesive, the dome 5 can be easily replaced when the dome 5 fails.

[0035] Furthermore, the counterweight 1 is a ring-shaped structural member provided with a second through-hole, and the first through-hole and the second through-hole are arranged to face each other. The counterweight 1 is used to adjust the resonance frequency of the speaker. The counterweight 1 has a certain weight, and the weight is not limited herein and can be set according to the actual situation. The counterweight 1 may be adhered to the electric diaphragm 4. The counterweight 1 may be rectangular, elliptical, etc. so that the acting force applied to the electric diaphragm 4 is uniform.

[0036] Furthermore, the electric diaphragm 4 has a first region, a second region, and a third region. The counterweight 1 is provided in the first region of the electric diaphragm 4. The electric diaphragm 4 is connected to the intermediate housing 3 through the second region. The third region is located between the first region and the second region, and the third region of the electric diaphragm 4 is recessed in the direction towards the lower housing 2 or the third region of the electric diaphragm 4 is recessed in the direction opposite to the lower housing 2.

[0037] The first region, the second region, and the third region are located on the first surface of the electric diaphragm 4. The counterweight 1 is connected to the first region of the electric diaphragm 4 and may be specifically adhered. The intermediate housing 3 is connected to the second region of the electric diaphragm 4. Since the third region of the electric diaphragm 4 is recessed in the direction towards the lower housing 2 or the third region of the electric diaphragm 4 is recessed in the direction opposite to the lower housing 2, the third region is formed into a curved arc, whereby the dome 5 can be easily reciprocated when the electric diaphragm 4 is distorted.

[0038] As shown in FIG. 2, a third through hole is provided in the intermediate housing 3, and a gap is provided between the counterweight 1 and the intermediate housing 3, so that the counterweight 1 is suspended in the accommodation cavity. Thus, when distortion occurs in the electric diaphragm 4 and the dome 5 is moved toward the lower housing 2, the intermediate housing 3 is prevented from interfering with the movement of the electric diaphragm 4. The counterweight 1 can adjust the resonance frequency of the dome 5 by applying an acting force to the electric diaphragm 4 by its own gravity.

[0039] Furthermore, the third through hole is a countersunk hole, and the countersinking of the countersunk hole is located at an end of the intermediate housing 3 away from the dome 5. In the moving direction of the dome 5, the projections of both the dome 5 and the counterweight 1 are within the projection of the countersunk hole. Thereby, the counterweight 1 and the dome 5 can reciprocate within the countersunk hole. The height of the counterweight 1 is greater than half of the height of the countersunk hole and less than the height of the countersunk hole, so that the counterweight 1 is suspended in the countersunk hole and can move along with the movement of the dome 5.

[0040] As shown in FIG. 2, the speaker further includes a diaphragm holder, the diaphragm holder is disposed around the electric diaphragm 4, and the electric diaphragm 4 is fixedly connected to the intermediate housing 3 through the diaphragm holder. In order to save the usage amount of the electric diaphragm 4 and reduce the cost of the speaker, the diaphragm holder can be made of an inexpensive insulating material.

[0041] The embodiment of the present application further provides an electronic device including the speaker in the above embodiment. In the structure of the above speaker, since there is no magnetic steel and coil, magnetic field interference to the circuits and devices around the speaker is avoided, and the operating environment of the circuits and devices around the speaker can be made clean. In addition, the above speaker has a simple structure and a small occupied space, so that the demand for thinning of the electronic device can be further met.

[0042] The foregoing description is merely specific embodiments of the present invention and is not intended to limit the protection scope of the present invention. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention shall fall within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. It includes a counterweight, a lower housing, an intermediate housing, an electric vibrating piece, and a dome provided in sequence. The lower housing, the intermediate housing, and the electric vibrating piece are assembled to form an accommodation cavity. The counterweight is provided in the accommodation cavity and is connected to the first surface of the electric vibrating piece. The dome is provided on the second surface of the electric vibrating piece opposite to the counterweight. When a voltage is applied to the electric vibrating piece, the electric vibrating piece drives to move the dome. The electric vibrating piece has a first region, a second region, and a third region. The counterweight is provided in the first region of the electric vibrating piece. The electric vibrating piece is connected to the intermediate housing through the second region. The third region is located between the first region and the second region. The third region of the electric vibrating piece is recessed in the direction towards the lower housing or the third region of the electric vibrating piece is recessed in the direction opposite to the lower housing, a speaker.

2. The electric vibrating piece is a ring-shaped structural member provided with a first through hole, and the dome covers the first through hole. The speaker according to Claim 1.

3. The counterweight is a ring-shaped structural member provided with a second through hole, and the first through hole and the second through hole are arranged opposite to each other. The speaker according to Claim 2.

4. The electric vibrating piece is an ion-conductive vibrating piece. When the voltage applied to the ion-conductive vibrating piece is a first voltage, the ion-conductive vibrating piece drives to move the dome in a first direction. When the voltage applied to the ion-conductive vibrating piece is a second voltage, the ion-conductive vibrating piece drives to move the dome in a second direction. The first voltage and the second voltage have opposite polarities, and the first direction is opposite to the second direction. The speaker according to claim 1.

5. When the voltage applied to the ion-conductive diaphragm is the first voltage, the ion-conductive diaphragm drives the dome to move in the first direction by a first distance. When the voltage applied to the ion-conductive diaphragm is the third voltage, the ion-conductive diaphragm drives the dome to move in the first direction by a second distance. The first voltage and the third voltage have the same polarity, the third voltage is greater than the first voltage, and the first distance and the second distance are different. The speaker according to claim 4.

6. When the voltage applied to the ion-conductive diaphragm is the first voltage, the ion-conductive diaphragm drives the dome to move in the first direction at a first speed. When the voltage applied to the ion-conductive diaphragm is the third voltage, the ion-conductive diaphragm drives the dome to move in the first direction at a second speed. The first voltage and the third voltage have the same polarity, the third voltage is greater than the first voltage, and the first speed and the second speed are different. The speaker according to claim 4.

7. A third through hole is provided in the intermediate housing, and there is a gap between the counterweight and the intermediate housing. The speaker according to claim 1.

8. The third through hole is a countersunk hole, the countersinking of the countersunk hole is located at an end of the intermediate housing away from the dome, and in the moving direction of the dome, the projections of both the dome and the counterweight are within the projection of the countersunk hole. The speaker according to claim 7.

9. The height of the counterweight is greater than half of the height of the counterbore, and the height of the counterweight is less than the height of the counterbore. The speaker according to claim 8.

10. Further comprising a diaphragm holder, the diaphragm holder being provided around the electric diaphragm, and the electric diaphragm being fixedly connected to the intermediate housing via the diaphragm holder. The speaker according to claim 1.

11. An electronic device including the speaker according to any one of claims 1 to 10.

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