Transduction element, electromagnetic transduction device and miniature loudspeaker

Abstract

The invention discloses a transduction element, an electromagnetic transduction device and a miniature loudspeaker. The transduction element comprises a transduction body, a wireless induction unit and an electromagnetic transduction unit, wherein the wireless induction unit and the electromagnetic transduction unit are arranged on the transduction body; the electromagnetic transduction unit comprises a plurality of conductive line segments, the conductive line segments are parallel to each other, and a gap is formed between every two adjacent conductive line segments; the wireless induction unit is an induction coil arranged on the transduction body, the wireless induction unit is electrically connected with the electromagnetic transduction unit, and the wireless induction unit is used for forming induction current to supply the induction current to each conductive line segment of the electromagnetic transduction unit when the wireless induction unit is subjected to an external induction magnetic field. The transduction element provided by the invention adopts a wireless induction power supply mode to supply power, so that the position arrangement of the transduction element is not interfered by a lead, the position setting of the transduction element is flexible, and the miniaturization design of the electromagnetic transducer with the transduction element is further facilitated.

Description

Technical Field

[0001] The present invention relates to the field of transducer devices, and in particular to a transducer element, a transducer device and a miniature loudspeaker. Background Art

[0002] Electromagnetic transducers are devices that use the interaction between the magnetic field generated by the energized transducer element and the magnetic field generated by the magnetic element to drive the energized transducer element to move. Electromagnetic transducers are widely used. For example, electromagnetic transducers can be used in speakers to drive the diaphragm to vibrate and drive the speaker to sound. Electromagnetic transducers can also be used in solenoid valves to drive the valve core to move and drive the solenoid valve to open and close.

[0003] In the prior art, the transducer element is generally directly connected to the power source by a wire, that is, the transducer element is connected to the power source by a wired connection. This connection method is simple, but the connecting wire will affect the position layout of the transducer element, which is not conducive to the miniaturization design of the electromagnetic transducer. Summary of the invention

[0004] The purpose of the present invention is to provide a transducer element, an electromagnetic transducer device and a micro speaker to overcome the deficiencies in the prior art.

[0005] In order to achieve the above object, the solution of the present invention is: A transducer element comprises a transducer body, a wireless induction unit arranged on the transducer body, and an electromagnetic transducer unit; the electromagnetic transducer unit comprises a plurality of conductive line segments arranged on the transducer body, each conductive line segment is parallel to each other and there is a gap between adjacent conductive line segments; the wireless induction unit is an induction coil arranged on the transducer body, the wireless induction unit is electrically connected to the electromagnetic transducer unit, and the wireless induction unit is used to generate an induced current to supply each conductive line segment of the electromagnetic transducer unit when it is subjected to an external induced magnetic field.

[0006] The transducer element also includes a wireless signal receiving unit and a current modulation unit arranged on the transducer body; the wireless signal receiving unit is used to receive external wireless signals; the current modulation unit is electrically connected to the wireless signal receiving unit, the wireless sensing unit and the electromagnetic transducer unit, and the current modulation unit is used to modulate the induced current of the wireless sensing unit according to the external wireless signal received by the wireless signal receiving unit, thereby modulating the current of each conductive line segment of the electromagnetic transducer unit.

[0007] The transducer element also includes a current modulation unit arranged on the transducer body; the wireless sensing unit is electrically connected to the electromagnetic transducer unit through a signal modulation and demodulation unit; the signal modulation and demodulation unit is used to modulate the induced current of the wireless sensing unit, thereby modulating the current of each conductive line segment of the electromagnetic transducer unit.

[0008] An electromagnetic transducer device comprises at least one electromagnetic transducer unit; the electromagnetic transducer unit comprises at least one magnetic element for generating a driving magnetic field and the transducer element as described above; the transducer element is movably arranged in the driving magnetic field generated by the magnetic element; when currents with the same current direction are passed through each conductive line segment of the transducer element, the transducer element will interact with the driving magnetic field generated by the magnetic element to cause the transducer element to move.

[0009] The electromagnetic transducer device further comprises a supply element for forming an induced magnetic field.

[0010] The supply element includes an induction supply unit and a power supply unit, wherein the power supply unit is electrically connected to the induction supply unit so that the induction supply unit passes a current for forming an induction magnetic field.

[0011] The supply element further includes a signal supply unit; the signal supply unit is electrically connected to the inductive supply unit and the power supply unit, and the signal supply unit is used to control the current passing through the inductive supply unit according to an external signal to control the inductive magnetic field formed by the inductive supply unit.

[0012] The electromagnetic transducer device further comprises a shell; the electromagnetic transducer unit is installed in the shell.

[0013] The shell is made of magnetic conductive material.

[0014] A miniature loudspeaker comprises a diaphragm and the electromagnetic transducer device as described above; the diaphragm is combined with a transducer element of the electromagnetic transducer device.

[0015] After adopting the above scheme, the transducer element of the present invention is provided with a wireless induction unit so that the transducer element can be powered by wireless induction power supply to ensure that the transducer element can be powered normally; and the transducer element adopts wireless induction power supply to supply power so that the position of the transducer element can be arranged without interference from the wire, so that the position setting of the transducer element is flexible, which helps to miniaturize the design of the electromagnetic transducer with the transducer element. When the power is turned on, the conductive line segments of the electromagnetic transducer unit of the transducer element of the present invention will interact with the external driving magnetic field to drive the transducer element to move. The conductive line segments of the electromagnetic transducer unit are parallel to each other and there are gaps between adjacent conductive line segments. This setting can prevent the conductive line segments from being affected by the induced magnetic field (the induced magnetic field is generated by the energized coil), thereby ensuring the reliability of the movement of the transducer element. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of the electromagnetic transducer device of the present invention; Figure 2This is a schematic diagram of a first matching mode of the electromagnetic transducer device of the present invention; Figure 3 It is a structural schematic diagram of a first matching mode of the electromagnetic transducer device of the present invention; Figure 4 is a schematic diagram of a second matching mode of the electromagnetic transducer device of the present invention; Figure 5 is a schematic structural diagram of the energy conversion element of the present invention; Figure 6 It is a structural schematic diagram of a first embodiment of the electromagnetic transducer unit of the present invention; Figure 7 It is a structural schematic diagram of a second embodiment of the electromagnetic transducer unit of the present invention; Figure 8 is a cross-sectional view of a micro-speaker of the present invention; Description of labels: Micro speaker S, Electromagnetic transducer device T Electromagnetic transducer monomer T1, Transducer element T11, Transducer body 1, Wireless sensing unit 2, Electromagnetic transducer unit 3, substrate 30, conductive line segment 31, micro line segment area 310, positive conductive portion 32, positive conductive hole 321, negative conductive portion 33, negative conductive hole 331, Wireless signal receiving unit 4, Current modulation unit 5, Magnetic element T12, magnetic field line T120, first magnetic element T121, second magnetic element T122, Magnetic element T2, Shell T3, Supply element T4, induction supply unit T41, power supply unit T42, signal supply unit T43, Diaphragm M, Housing K, outlet K1. DETAILED DESCRIPTION

[0017] In order to further explain the technical solution of the present invention, the present invention is described in detail below through specific embodiments.

[0018] like Figures 1 to 8As shown, the present invention discloses a transducer element T11, which includes a transducer body 1, a wireless induction unit 2 and an electromagnetic transducer unit 3 arranged on the transducer body 1; the electromagnetic transducer unit 3 includes a plurality of conductive line segments 31 arranged on the transducer body 1, each conductive line segment 31 is parallel to each other and there is a gap between adjacent conductive line segments 31; the wireless induction unit 2 is an induction coil arranged on the transducer body 1, the wireless induction unit 2 is electrically connected to the electromagnetic transducer unit 3, and the wireless induction unit 2 is used to generate an induced current to supply each conductive line segment 31 of the electromagnetic transducer unit 3 when it is subjected to an external induced magnetic field.

[0019] The transducer element T11 of the present invention is provided with a wireless induction unit 2 so that the transducer element T11 can be powered by wireless induction power supply to ensure that the transducer element T11 can be powered normally; and the transducer element T11 adopts wireless induction power supply to supply power so that the position of the transducer element T11 can be arranged without interference from the wire, so that the position setting of the transducer element T11 is flexible, which helps to miniaturize the electromagnetic transducer T with the transducer element T11. When powered on, the conductive line segment 31 of the electromagnetic transducer unit 3 of the transducer element T11 of the present invention interacts with the external driving magnetic field to drive the transducer element T11 to move. The conductive line segments 31 of the electromagnetic transducer unit 3 are parallel to each other and there are gaps between adjacent conductive line segments 31. This setting can prevent the conductive line segments 31 from being affected by the induced magnetic field (the induced magnetic field is generated by the energized coil), thereby ensuring the reliability of the movement of the transducer element T11.

[0020] In the present invention, the transducer element T11 further includes a wireless signal receiving unit 4 and a current modulation unit 5 disposed on the transducer body 1; the wireless signal receiving unit 4 is used to receive external wireless signals; the current modulation unit 5 is electrically connected to the wireless signal receiving unit 4, the wireless sensing unit 2 and the electromagnetic transducer unit 3, and the current modulation unit 5 is used to modulate the induced current of the wireless sensing unit 2 according to the external wireless signal received by the wireless signal receiving unit, thereby modulating the current of each conductive line segment 31 of the electromagnetic transducer unit 3. The wireless signal receiving unit 4 can be an antenna disposed on the transducer body 1, specifically an antenna that meets various wireless communication requirements such as Bluetooth communication or wifi communication, and the antenna can be directly printed on the transducer body 1; the current modulation unit 5 modulates the current of each conductive line segment 31 of the electromagnetic transducer unit 3, so that each conductive line segment 31 of the electromagnetic transducer unit 3 can interact with the external driving magnetic field to drive the transducer element T11 to move. In the present invention, the current modulation unit 5 may be provided with (but not limited to) circuit elements such as boost, buck, current stabilization, analog-to-digital conversion (AC to DC or DC to AC), switching and / or pulse-width modulation (PWM), so as to achieve modulation of the current flowing through each conductive line segment 31 of the electromagnetic transducer unit 3. It should be noted that the transducer element T11 of the present invention may not be provided with a wireless signal receiving unit 4, and the information of the external control signal may be directly loaded into the induced magnetic field, and the wireless induction unit 2 is electrically connected to the electromagnetic transducer unit 3 through the signal modulation and demodulation unit 5; the signal modulation and demodulation unit 3 obtains the corresponding control information from the induced current and then modulates the current flowing through each conductive line segment 31 of the electromagnetic transducer unit 3.

[0021] In the present invention, the electromagnetic transducer unit 3 can form multiple parallel and directional conductive line segments 31 shown in the diagram on a substrate 30 through a plating or metallization process, or a lithography and etching process, so as to realize a miniaturized electromagnetic transducer unit 3, and the substrate 30 of the electromagnetic transducer unit 3 is matched to the transducer body 1. There is a gap between adjacent conductive line segments 31 of the electromagnetic transducer unit 3, and the gap is formed by the part etched away by the etching process. The material of the substrate 30 is preferably one of ceramic, glass, sapphire, LDS plastic, germanium chip, gallium arsenide, indium phosphide, gallium nitride, silicon carbide, BT (Bismaleimide Triacine), ABF (Ajinomoto Build-up Film), bakelite, glass fiber, plastic or zinc selenide. The material of the substrate 30 includes but is not limited to related materials in the fields of semiconductors, IC substrates, PCBs, etc.

[0022] Cooperate Figure 6As shown, in the first embodiment of the electromagnetic transducer unit 3 of the present invention, the substrate 30 is provided with a positive conductive part 32 and a negative conductive part 33, and each conductive line segment 31 of the substrate 30 is located between the positive conductive part 32 and the negative conductive part 33. The first end of each conductive line segment 31 of the substrate 30 is connected to the positive conductive part 32 of the substrate 30, and the second end of each conductive line segment 31 of the substrate 30 is connected to the negative conductive part 33 of the substrate 30. The present invention arranges the positive conductive part 32 and the negative conductive part 33 so as to simultaneously connect each conductive line segment 31 of the substrate 30 to the current with the same current direction. The positive conductive part 32 and the negative conductive part 33 can be respectively provided with a positive conductive hole 321 and a negative conductive hole 331 for connecting to an external current.

[0023] Cooperate Figure 7 As shown, in the second embodiment of the electromagnetic transducer unit 3 of the present invention, the conductive line segment 31 formed on the substrate 30 is divided into at least two micro-line segment areas 310, each micro-line segment area 310 has a plurality of conductive line segments 31, and a gap is formed between adjacent micro-line segment areas 310. The substrate 30 is also provided with the same number of positive conductive parts 32 and negative conductive parts 33 as the micro-line segment areas 310, and each micro-line segment area 310 is arranged corresponding to a positive conductive part 32 and a negative conductive part 33; wherein each micro-line segment area 310 is located between the positive conductive part 32 and the negative conductive part 33 corresponding to the micro-line segment area 310, and the first end of each conductive line segment 31 of each micro-line segment area 310 is connected to the positive conductive part 32 corresponding to the micro-line segment area 310, and the second end of each conductive line segment 31 of each micro-line segment area 310 is connected to the negative conductive part 33 corresponding to the micro-line segment area 310. The present invention is configured in such a way that currents with the same current direction are simultaneously connected to each conductive line segment 31 of the micro-line segment area 310 through the positive conductive portion 32 and the negative conductive portion 33 corresponding to the micro-line segment area 310 .

[0024] In the present invention, after the electromagnetic transducer unit 3 is powered by the wireless induction unit 2, the stable current flowing through each conductive line segment 31 in the same direction can interact with an external driving magnetic field to generate a force of interaction between the magnetic field and the current, thereby driving the transducer element T11 to move. The material, line width, length, gap between adjacent conductive line segments 31, number of conductive coils 31, etc. of the conductive line segments 31 in the electromagnetic transducer unit 3 are all parameters that determine the impedance value of the entire electromagnetic transducer unit 3. Therefore, when designing this electromagnetic transducer unit 3, it is necessary to know the impedance and the magnetic field conditions that are desired to be formed. The present invention can utilize one of the semiconductor processes (such as photolithography), PCB processes, IC substrate processes, glass substrate processes (such as Modified Semi-Additive Processes), SAP (Semi-Additive Processes), thick copper processes or subtractive (tenting) processes) to form conductive line segments 31 with the same direction and maximized length on a limited substrate 500 area, and can minimize the line segment gaps between adjacent conductive line segments 31, so as to allow the conductive line segments 31 that form the magnetic field to have the largest area and be able to withstand higher currents; wherein the length dimension range of each conductive coil is in the millimeter level (mm), thereby forming a magnetic chip with an overall dimension level of square millimeters, and the conductive line segment width dimension and the distance between adjacent conductive line segments are in the micrometer or nanometer level (μm / nm).

[0025] In the present invention, the transducer element T11 can be implemented as a single chip, or can be formed into an integrated integrated circuit (IC) by system on chip (SoC) or system in package (SiP) integration technology, and a surface mount technology (SMT) can be used to combine multiple transducer elements T11 on a substrate.

[0026] like Figures 1 to 4As shown, the present invention also discloses an electromagnetic transducer device T, which includes at least one electromagnetic transducer monomer T1; the electromagnetic transducer monomer T1 includes at least one magnetic element T12 for generating a driving magnetic field and the transducer element T11 as described above; the transducer element T11 is movably arranged in the driving magnetic field generated by the magnetic element T12; when each conductive line segment 31 of the transducer element T11 is passed through a current with the same current direction, the transducer element T11 will interact with the driving magnetic field generated by the magnetic element T12 to make the transducer element T11 move. The number of magnetic elements T12 of the electromagnetic transducer monomer T1 can be two, and the two magnetic elements T12 are divided into a first magnetic element T121 and a second magnetic element T122, and a driving magnetic field is generated between the first magnetic element T121 and the second magnetic element T122; the linear micro-segment element C is movably arranged between the first magnetic element T121 and the second magnetic element T122, so that the linear micro-segment element C is movably arranged in the driving magnetic field.

[0027] In the present invention, the electromagnetic transducer monomer T1 may be equipped with a corresponding magnetic conductive element T2. The magnetic conductive element T2 is an element made of magnetic conductive material. When designing the magnetic conductive element T2, magnetic conductive materials with different magnetic permeabilities are used according to actual needs to guide the magnetic circuit direction of the driving magnetic field formed by at least one magnetic element T12 in the electromagnetic transducer monomer T1, thereby adjusting the interaction effect between the transducer element T11 and the driving magnetic field.

[0028] In the present invention, the electromagnetic transducer device T may further include a shell T3, and the electromagnetic transducer unit T1 is installed in the shell T3. The material of the shell T3 may be a magnetic conductive material. The shell T3 of the magnetic conductive material can guide the magnetic path direction of the driving magnetic field formed by at least one magnetic element T12 in the electromagnetic transducer unit T1. In the present invention, the first magnetic element T121 and the second magnetic element T122 of the electromagnetic transducer unit T1 may be relatively arranged in the shell T3, so that the driving magnetic field formed between the first magnetic element T121 and the second magnetic element T122 is a parallel magnetic field. When the first magnetic element T121 and the second magnetic element T122 are arranged, the relative magnetic properties thereof should be respectively N pole and S pole, so that the magnetic field lines T120 from N pole to S pole can be formed inside the shell T3 of the electromagnetic transducer device T. The transducer element T11 of the electromagnetic transducer unit T1 is movably arranged in the shell T3, so that the transducer element T11 can move under the action of the driving magnetic field.

[0029] In the present invention, the electromagnetic transducer device T also includes a supply element T4 for forming an induced magnetic field, and the supply element T4 provides a power source for the transducer element T11; the supply element T4 is actually a wireless charging seat, and the specifications of the supply element T4 can (but are not limited to) comply with the international Qi wireless charging regulations. The supply element T4 may specifically include an induction supply unit T41 and a power supply unit T42, and the power supply unit T42 is electrically connected to the induction supply unit T41 so that the induction supply unit T41 passes a current for forming an induced magnetic field, and the induction supply unit T41 uses a wireless induction coil. The supply element T4 may also include a signal supply unit T43; the signal supply unit T43 is electrically connected to the induction supply unit T41 and the power supply unit T42, and the signal supply unit T43 is used to control the current passing through the induction supply unit T41 according to an external signal to control the induced magnetic field formed by the induction supply unit T41.

[0030] In the present invention, Figure 2 As shown, the electromagnetic transducer device T can be an electromagnetic transducer unit T1 equipped with a supply element T4, and the inductive supply unit T41 of the supply element T4 can be specifically combined with a magnetic element T12 of the electromagnetic transducer unit T1; Figure 4 As shown, the electromagnetic transducer device T may also be a plurality of electromagnetic transducer monomers T1 sharing a supply element T4, and the supply element T4 is independently arranged from the electromagnetic transducer monomer T1, so that the cost can be reduced.

[0031] Cooperate Figure 8 As shown, the present invention also discloses a micro speaker S, which includes a diaphragm M and the electromagnetic transducer T as described above; the diaphragm M is combined with a transducer element T11 of the electromagnetic transducer T; when the transducer element T11 moves under the action of a driving magnetic field, it can drive the diaphragm M to vibrate, thereby emitting sound. The micro speaker S may also include a housing K, the housing K having an outlet K1, the diaphragm M and the electromagnetic transducer T are fitted in the housing K, and the outlet K1 is used to allow the sound emitted by the vibration of the diaphragm M to be transmitted to the outside of the housing K.

[0032] The above embodiments and drawings do not limit the product form and style of the present invention. Any appropriate changes or modifications made by ordinary technicians in the relevant technical field should be deemed to be within the patent scope of the present invention.

Claims

1. A transducer element, characterized in that: It includes a transducer body, a wireless sensing unit and an electromagnetic transducer unit arranged on the transducer body; The electromagnetic transducer unit comprises a plurality of conductive line segments arranged on the transducer body, each conductive line segment is parallel to each other and there is a gap between adjacent conductive line segments; The wireless induction unit is an induction coil arranged on the transducer body. The wireless induction unit is electrically connected to the electromagnetic transducer unit. The wireless induction unit is used to generate an induced current to supply each conductive line segment of the electromagnetic transducer unit when it is subjected to an external induced magnetic field.

2. The transducer element according to claim 1, characterized in that: It also includes a wireless signal receiving unit and a current modulation unit disposed on the transducer body; the wireless signal receiving unit is used to receive external wireless signals; The current modulation unit is electrically connected to the wireless signal receiving unit, the wireless sensing unit and the electromagnetic transducer unit. The current modulation unit is used to modulate the induced current of the wireless sensing unit according to the external wireless signal received by the wireless signal receiving unit, thereby modulating the current of each conductive line segment of the electromagnetic transducer unit.

3. The transducer element according to claim 1, characterized in that: It also includes a current modulation unit arranged on the transducer body; the wireless sensing unit is electrically connected to the electromagnetic transducer unit through a signal modulation and demodulation unit; the signal modulation and demodulation unit is used to modulate the induced current of the wireless sensing unit, thereby modulating the current of each conductive line segment of the electromagnetic transducer unit.

4. An electromagnetic transducer device, characterized in that: comprising at least one electromagnetic transducer unit; The electromagnetic transducer monomer comprises at least one magnetic element for generating a driving magnetic field and the transducer element according to any one of claims 1 to 3; the transducer element is movably arranged in the driving magnetic field generated by the magnetic element; When currents with the same current direction flow through each conductive line segment of the transducer element, the transducer element will interact with the driving magnetic field generated by the magnetic element to cause the transducer element to move.

5. The electromagnetic transducer device according to claim 4, characterized in that: Also included are supply elements for forming an induction magnetic field.

6. The electromagnetic transducer device according to claim 5, characterized in that: The supply element includes an induction supply unit and a power supply unit, wherein the power supply unit is electrically connected to the induction supply unit so that the induction supply unit passes a current for forming an induction magnetic field.

7. The electromagnetic transducer device according to claim 6, characterized in that: The supply element further includes a signal supply unit; the signal supply unit is electrically connected to the inductive supply unit and the power supply unit, and the signal supply unit is used to control the current passing through the inductive supply unit according to an external signal to control the inductive magnetic field formed by the inductive supply unit.

8. The electromagnetic transducer device according to claim 4, characterized in that: It also includes a shell; the electromagnetic transducer unit is installed in the shell.

9. The electromagnetic transducer device according to claim 8, characterized in that: The shell is made of magnetic conductive material.

10. A micro speaker, characterized in that: It comprises a diaphragm and the electromagnetic transducer device as claimed in any one of claims 4 to 9; the diaphragm is combined with the transducer element of the electromagnetic transducer device.

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