Loudspeaker for tablet personal computer

Abstract

The utility model relates to a loudspeaker for a tablet computer. The loudspeaker comprises a support, a voice diaphragm, a dome, a voice coil, a circuit board, a pole piece, magnetic steel and a magnetic bowl. The voice diaphragm is adhered to the top of the bracket; the voice diaphragm is provided with an avoiding area; a groove is formed between the avoiding area and the edge position of the voice diaphragm on the voice diaphragm; the dome is adhered to the lower surface of the voice diaphragm and covers the avoiding area; the dome is made of magnesium-aluminum alloy; the voice coil is adhered to the lower surface of the dome and shares the same axis with the dome; the circuit board is adhered to one end of the lower surface of the bracket and is electrically connected with the voice coil; the magnetic steel is bonded in the magnetic bowl; the pole piece is adhered to the top of the magnetic steel, and the magnetic steel is sleeved in the voice coil; and the magnetic bowl is adhered to the bottom of the bracket. According to the utility model, the mass of the dome is reduced by replacing the material of the dome, the sound pressure of the loudspeaker is improved, and the sound effect of the panel is further improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to loudspeaker technical field, especially a loudspeaker for tablet computer. BACKGROUND

[0002] The main role of the tablet computer loudspeaker is to provide high-quality audio output, including the playing of multimedia content such as music, movies, games, etc. The loudspeaker converts electrical signals into sound, allowing users to hear clear, balanced sound effects, improving overall audio-visual experience.

[0003] At present, with the improvement of people's demand for tablet viewing effect, insufficient sound pressure is a common problem of tablet voltage.

[0004] Therefore, it is necessary to provide a loudspeaker for tablet computer, so as to solve the above technical problems. INVENTION CONTENTS

[0005] The utility model aims at providing a loudspeaker for tablet computer, which reduces the mass of the dome by replacing the material of the dome, improves the sound pressure of the loudspeaker, and further improves the sound effect of the tablet.

[0006] In order to achieve the above-mentioned purpose of the utility model, a loudspeaker for tablet computer is provided, which comprises a support, a sound film, a dome, a voice coil, a circuit board, a pole piece, a magnetic steel and a magnetic bowl.

[0007] The sound film is bonded to the top of the support.

[0008] The sound film has a clearance area;

[0009] The sound film has a groove between the clearance area and the edge of the sound film.

[0010] The dome is bonded to the lower surface of the sound film and covers the clearance area.

[0011] The material of the dome is magnesium-aluminum alloy.

[0012] The voice coil is bonded to the lower surface of the dome and shares the same axis with the dome.

[0013] The circuit board is bonded to one end of the lower surface of the support and is electrically connected with the voice coil.

[0014] The magnetic steel is bonded in the magnetic bowl, the pole piece is bonded to the top of the magnetic steel, and the magnetic steel is sleeved in the voice coil.

[0015] The magnetic bowl is bonded to the bottom of the support.

[0016] Preferably, the upper surface of the dome has a convex package.

[0017] Preferably, a balancing plate is adhered to the other end of the lower surface of the bracket, and the shape of the balancing plate is adapted to the circuit board.

[0018] Furthermore, inside the magnetic cup, auxiliary magnets are symmetrically bonded to both sides of the main magnet, with a gap between each auxiliary magnet and the main magnet for the voice coil to pass through; a secondary pole piece is embedded in the bracket, and the secondary pole piece is located directly above the two auxiliary magnets.

[0019] Furthermore, air vents are provided at the middle positions on both sides of the bracket shown.

[0020] The advantages of this invention for a tablet computer speaker compared to existing technologies are as follows:

[0021] (1) By changing the dome material to reduce the dome mass, the speaker's sound pressure level is increased, thereby improving the flat panel sound effect. Vents are added to the bracket to improve low-frequency response and enhance the radiation efficiency of low-frequency sound waves, effectively improving the low-frequency response of the speaker system, making the bass fuller and more powerful; reducing distortion and making the sound purer. This also improves efficiency.

[0022] (2) Simple structure and easy to use. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of a speaker for a tablet computer according to this embodiment;

[0024] Figure 2 This is an exploded view of a speaker for a tablet computer according to this embodiment;

[0025] Figure 3 This is a schematic diagram of the support structure in this embodiment;

[0026] Figure 4 This is a cross-sectional view of a speaker for a tablet computer according to this embodiment. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0028] Example

[0029] like Figure 1 and Figure 2 As shown, a speaker for a tablet computer in this embodiment includes a stand 1, a diaphragm 2, a dome 3, a voice coil 4, a circuit board 5, an electrode 6, a magnet 7, and a magnetic cup 8.

[0030] The diaphragm 2 is bonded to the top of the bracket 1; the diaphragm 2 has a clearance area 9; a groove 10 is provided on the diaphragm 2 between the clearance area 9 and the edge of the diaphragm 2, which supports the diaphragm 2, provides stable support for the diaphragm 2, and enables the diaphragm 2 to vibrate in a specified position and range, ensuring the normal propagation of sound.

[0031] The dome 3 is bonded to the lower surface of the diaphragm 2 and covers the clearance area 9; the dome 3 is made of magnesium-aluminum alloy, which reduces the mass of the dome, increases the sound pressure of the speaker, and thus improves the sound effect of the flat panel.

[0032] In this embodiment, the upper surface of the dome 3 has a convex bulge 11, which serves to improve the strength of the dome 3.

[0033] The voice coil 4 is bonded to the lower surface of the dome 3 and shares the same axis with the dome 3.

[0034] The circuit board 5 is bonded to one end of the lower surface of the bracket 1 and is electrically connected to the voice coil 4.

[0035] In this embodiment, a balance plate 12 is attached to the other end of the lower surface of the bracket 1. The shape of the balance plate 12 is adapted to the circuit board 5. With this arrangement, the balance plate 12 can provide certain support for components such as the voice coil 4 and the diaphragm 2, ensuring that they maintain the correct position and posture when the speaker is working. It also helps to fix these components to the speaker frame.

[0036] The magnet 7 is bonded inside the magnetic cup 8; the pole piece 6 is bonded to the top of the magnet 7, and the magnet 7 is fitted inside the voice coil 4.

[0037] The magnetic bowl 8 is attached to the bottom of the bracket 1.

[0038] In this embodiment, within the magnetic cup 8, auxiliary magnets 13 are symmetrically bonded to both sides of the magnet 7, with a gap between each auxiliary magnet 13 and the magnet 7 for the voice coil 4 to pass through; a secondary pole piece 14 is embedded in the bracket 1, and the secondary pole piece 14 is located directly above the two auxiliary magnets 13; this arrangement balances the frequency response, improves sensitivity, adjusts sound characteristics, and protects the voice coil.

[0039] In this embodiment, as Figure 3As shown, vents 15 are located at the center of both sides of the bracket 1. This design enhances low-frequency response: by providing vents 15 on the speaker, the sound waves radiated from behind the speaker cone are superimposed on the sound waves in front of the diaphragm after passing through the vents, thereby enhancing the radiation efficiency of low-frequency sound waves and effectively improving the low-frequency response of the speaker system, making the bass fuller and more powerful. It also reduces distortion: the vents allow the diaphragm amplitude to be relatively reduced when the speaker is operating in the low-frequency range, which helps to reduce nonlinear distortion caused by excessive diaphragm vibration, resulting in a purer sound. Furthermore, it improves efficiency: because the vents allow for better utilization of the sound waves in front of and behind the speaker, reducing sound wave cancellation and energy loss, it improves the electroacoustic conversion efficiency of the speaker system, enabling a higher sound pressure level output at the same input power.

[0040] like Figure 4 As shown, when the audio current passes through the voice coil 4, according to Ampere's law, a current-carrying conductor in a magnetic field experiences a force. Since the voice coil is in the magnetic field of the permanent magnet, it experiences a force related to the magnitude and direction of the current. The audio current is an alternating current that changes with time, so the magnitude and direction of the force on the voice coil 4 also change with time. Under this force, the voice coil reciprocates within the magnetic field of the permanent magnet. The motion of the voice coil 4 is transmitted to the diaphragm 2 through the dome, causing the diaphragm 2 to also reciprocate. The vibration of the diaphragm causes the surrounding air to vibrate, thus generating sound waves, which we can hear. Audio currents of different frequencies and amplitudes cause the voice coil to vibrate at different frequencies and amplitudes. Simultaneously, the diaphragm at the bottom of the voice coil 4 allows for linear vibration under high voltage, enabling the product to withstand higher power, thereby allowing the diaphragm 2 to emit sounds of different pitches and loudnesses. This achieves the conversion of electrical signals to sound signals. This product uses a single-layer magnesium-aluminum alloy as the dome material, reducing product weight and further increasing sound pressure level.

[0041] The preferred embodiments of this utility model have been described in detail above, but this utility model is not limited to the embodiments described. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of this utility model, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A speaker for a tablet computer, characterized by, The loudspeaker comprises a support, a diaphragm, a dome, a voice coil, a circuit board, a pole piece, a magnetic steel and a magnetic bowl; The diaphragm is bonded to the top of the support; The diaphragm has a clearance area; The diaphragm has a groove between the clearance area and the edge of the diaphragm; The dome is bonded to the lower surface of the diaphragm and covers the clearance area; The dome is made of magnesium-aluminum alloy; The voice coil is bonded to the lower surface of the dome and shares the same axis with the dome; The circuit board is bonded to one end of the lower surface of the support and is electrically connected to the voice coil; The magnetic steel is bonded to the magnetic bowl, and the pole piece is bonded to the top of the magnetic steel, which is sleeved in the voice coil; The magnetic bowl is bonded to the bottom of the support.

2. The speaker for a tablet of claim 1, wherein, The upper surface of the dome has a convexity.

3. The speaker for a tablet of claim 1, wherein, The other end of the lower surface of the support is bonded to a balance piece, which is shaped to fit the circuit board.

4. The speaker for a tablet as claimed in claim 3, wherein, In the magnetic bowl, two auxiliary magnetic steels are symmetrically bonded to the two sides of the magnetic steel, and the two auxiliary magnetic steels are spaced apart from the magnetic steel to allow the voice coil to pass through; the support is inlaid with an auxiliary pole piece, which is located directly above the two auxiliary magnetic steels.

5. The speaker for a tablet as claimed in claim 4, wherein, The support is provided with air outlets at the middle positions of the two sides.

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