Low-amplitude miniature loudspeaker

Abstract

The utility model relates to the technical field of loudspeakers, in particular to a low-amplitude miniature loudspeaker, which comprises a connecting cover, T-shaped iron is mounted in the connecting cover, a permanent magnet is sleeved on the T-shaped iron, a washer is connected to one side of the permanent magnet, a gap is reserved between the T-shaped iron and the permanent magnet, a voice coil is arranged in the gap, a basin frame is arranged on one side of the connecting cover, and a loudspeaker is arranged on the basin frame. One end of the cone frame is connected with the edge of the damper, the neck part on one side of the damper is fixed on the voice coil, a paper cone is bonded inside the cone frame, one end of the paper cone is fixed on the neck part on the other side of the damper, the edge of the other end of the paper cone is connected with a bending part, and the edge of the side surface of the bending part is provided with an installation surrounding edge. The dustproof cover is fixed on the outer surface of the basin stand and can cover the outer surface of the basin stand, so that external dust cannot be adhered to the surface of the damper or the voice coil from the outer surface of the basin stand during use, and the dustproof effect is improved.

Description

Technical Field

[0001] This utility model relates to the field of loudspeaker technology, and in particular to a low-amplitude miniature loudspeaker. Background Technology

[0002] A loudspeaker, commonly known as a "horn", is an electroacoustic transducer that converts electrical signals into sound signals. A low-amplitude loudspeaker refers to a loudspeaker whose maximum value of vibration physical quantity is relatively small.

[0003] Existing miniature loudspeakers generally consist of a vibration system, a magnetic circuit system, and a support system connecting and fixing the vibration system and the magnetic circuit system. Vibration is generated by the voice coil channel in the vibration system under the influence of the magnetic field of the magnetic circuit system, and then the vibration is converted into sound waves by the paper cone. However, gaps in the side of the frame in the support system allow external dust to penetrate the frame and adhere to the spider surface of the vibration system, hindering the loudspeaker and resulting in poor performance. Furthermore, since one edge of the paper cone is usually directly glued to the frame, high-frequency bending occurs at the connection point when the cone vibrates, easily leading to damage at this connection and further poor performance. Therefore, we propose a low-amplitude miniature loudspeaker. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned shortcomings in the existing technology by proposing a low-amplitude miniature loudspeaker.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a low-amplitude miniature loudspeaker is designed, including a connecting cover, a T-shaped iron is installed inside the connecting cover, a permanent magnet is fitted on the T-shaped iron, a washer is connected to one side of the permanent magnet, and there is a gap between the T-shaped iron and the permanent magnet, in which a voice coil is provided.

[0006] A frame is provided on one side of the connecting cover. One end of the frame is connected to the edge of the spider, and the neck of one side of the spider is fixed to the voice coil. A paper cone is glued inside the frame. One end of the paper cone is fixed to the neck of the other side of the spider, and the other end of the paper cone is connected to a bend. A mounting edge is installed on the side edge of the bend. A second edge is installed on one end of the frame. The outer edge of the mounting edge extends to one side of the second edge and is fixed to the second edge.

[0007] A dust cover is provided between the connecting cover and the basin stand. A first connecting ring is connected to one end of the dust cover. A first rim extends from the near ends of the connecting cover and the basin stand. The first connecting ring is located between the two first rims, and the three are fixed by a connecting mechanism. A second connecting ring is connected to the other end of the dust cover. The second connecting ring is fixed to the side of the second rim.

[0008] Preferably, the connecting mechanism includes a plurality of mounting holes on the side of the first perimeter connected to the connecting cover and the side of the first connecting ring. Each pair of mounting holes is provided with a bolt inside. The side of the first perimeter connected to the basin frame is provided with a plurality of threaded holes. The other end of each bolt extends into the corresponding threaded hole and is threadedly connected to the threaded hole.

[0009] Preferably, the end of the basin stand away from the connecting cover is provided with a pressure ring, the pressure ring abuts against the adjacent surface of the second circumference, and a receiving groove is provided on the side of the pressure ring near the second circumference, forming a receiving cavity between the receiving groove and the side of the second circumference, and the mounting circumference is located in the receiving cavity.

[0010] Preferably, a fixing ring is connected to one side edge of the pressure ring, and a limiting ring is provided along one side edge of the second perimeter. When the side of the pressure ring abuts against the side of the second perimeter, the fixing ring is located inside the limiting ring and is glued to the limiting ring.

[0011] Preferably, the distance between the permanent magnet and the T-shaped iron is greater than the thickness of the voice coil, and there are gaps between the permanent magnet and the T-shaped iron and the surface of the voice coil.

[0012] Preferably, the inner edge of the pressure ring is arc-shaped.

[0013] Preferably, a dust cover is coaxially provided inside the paper basin, and the edge of the dust cover is fixedly connected to the inner wall of the paper basin.

[0014] Preferably, the bend is S-shaped and made of pulp material.

[0015] The design scheme proposed in this utility model has the following beneficial effects in application:

[0016] 1. By fixing the dust cover to the outer surface of the basin stand, the outer surface of the basin stand can be covered. In this way, when in use, external dust will not adhere from the outer surface of the basin stand to the surface of the spring or voice coil, thus improving the dustproof effect.

[0017] 2. The bends installed on the edge of the paper basin can cushion the paper basin. When the paper basin vibrates, the bends can deform with the vibration of the paper basin, thereby reducing the bending strength of the connection between the paper basin and the basin frame, avoiding damage to the connection between the paper basin and the basin frame, and improving the performance. Attached Figure Description

[0018] Figure 1 The structure of this utility model is dispersed Figure 1 ;

[0019] Figure 2 The structure of this utility model is dispersed Figure 2 ;

[0020] Figure 3This is a side sectional view of the paper basin and bending part of the present invention.

[0021] Figure 4 This is a partial side sectional view of the pressure ring and fixing ring of this utility model.

[0022] In the diagram: 1. Bolt; 2. First rim; 3. Connecting cover; 4. Mounting hole; 5. T-shaped iron; 6. Permanent magnet; 7. Washer; 8. Voice coil; 9. Spider; 10. First connecting ring; 11. Dust cover; 12. Second connecting ring; 13. Span; 14. Receiving groove; 15. Threaded hole; 16. Second rim; 17. Limiting ring; 18. Mounting rim; 19. Bending part; 20. Pressure ring; 21. Fixing ring; 22. Cone; 23. Dust cover. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0024] Reference Figures 1-4 A low-amplitude miniature loudspeaker includes a connecting cover 3, inside which a T-shaped iron 5 is installed, and a permanent magnet 6 is fitted on the T-shaped iron 5. A washer 7 is connected to one side of the permanent magnet 6, and there is a gap between the T-shaped iron 5 and the permanent magnet 6. A voice coil 8 is installed in the gap. In actual use, a magnetic field is formed between the permanent magnet 6 and the T-shaped iron 5. When the voice coil 8 is energized, it will vibrate under the action of the magnetic field.

[0025] It should be noted that the gap between the permanent magnet 6 and the T-shaped iron 5 is greater than the thickness of the voice coil 8, and there are gaps between the permanent magnet 6 and the T-shaped iron 5 and the surface of the voice coil 8. In this way, the voice coil 8 will not rub against the permanent magnet 6 and the T-shaped iron 5 during vibration, and the surface of the voice coil 8 will not be worn.

[0026] like Figure 1 and Figure 2 As shown, a frame 13 is provided on one side of the connecting cover 3. One end of the frame 13 is connected to the edge of the spider 9, and one side of the neck of the spider 9 is fixed to the voice coil 8. A paper cone 22 is glued inside the frame 13. One end of the paper cone 22 is fixed to the neck of the spider 9 on the other side, and the other end edge of the paper cone 22 is connected to a bend 19. A mounting edge 18 is installed on the side edge of the bend 19. A second edge 16 is installed on one end of the frame 13. The outer edge of the mounting edge 18 extends to one side of the second edge 16 and is fixed to the second edge 16. In actual use, the vibration of the voice coil 8 will drive the spider 9 to vibrate, which will then transmit the vibration to the paper cone 22. The vibration of the paper cone 22 will convert the mechanical vibration into sound waves, thereby producing sound.

[0027] like Figure 1 As shown, a dust cover 23 is coaxially provided inside the paper cone 22. The edge of the dust cover 23 is fixedly connected to the inner wall of the paper cone 22. The dust cover 23 can block the internal opening of the paper cone 22, preventing dust from seeping into the surface of the voice coil 8 through the internal opening of the paper cone 22, thus improving the dustproof effect.

[0028] It should be noted that, as Figure 3 As shown, the bending part 19 is arranged in an "S" shape and is made of pulp material. The bending part 19 has high toughness, so that the paper basin 22 will be buffered by the bending part 19 when it vibrates, thereby avoiding fatigue caused by high frequency bending at the connection between the edge of the paper basin 22 and the basin frame 13, and improving the use effect.

[0029] like Figure 2 and Figure 4 As shown, a pressure ring 20 is provided at the end of the basin frame 13 away from the connecting cover 3. The pressure ring 20 abuts against the adjacent surface of the second circumference 16, and a receiving groove 14 is provided on the side of the pressure ring 20 near the second circumference 16. A receiving cavity is formed between the receiving groove 14 and the side of the second circumference 16. The mounting circumference 18 is located in the receiving cavity. In actual use, the pressure ring 20 can press and limit the second circumference 16, so that the paper basin 22 will not cause the second circumference 16 to loosen during vibration, thus improving the connection effect.

[0030] like Figure 1 and Figure 2 As shown, a dust cover 11 is also provided between the connecting cover 3 and the basin frame 13. One end of the dust cover 11 is connected to a first connecting ring 10. The connecting cover 3 and the basin frame 13 are both provided with first rims 2 at their adjacent ends. The first connecting ring 10 is located between the two first rims 2, and the three are fixed by a connecting mechanism. The other end of the dust cover 11 is connected to a second connecting ring 12. The second connecting ring 12 is fixed on the side of the second rim 16. In actual use, the basin frame 13 and the connecting cover 3 can be fixed together by connecting the two first rims 2. In this way, the dust cover 11 can cover the basin frame 13, preventing external dust from passing through the basin frame 13 and adhering to the spider 9 and voice coil 8, thus improving the dustproof effect.

[0031] The specific structure of the connecting mechanism is as follows: Figure 1 and Figure 2As shown, the connecting mechanism includes a number of mounting holes 4 on the sides of the first perimeter 2 connected to the connecting cover 3 and the first connecting ring 10. Each pair of mounting holes 4 is provided with a bolt 1 inside. The side of the first perimeter 2 connected to the basin frame 13 is provided with a number of threaded holes 15. The other end of each bolt 1 extends into the corresponding threaded hole 15 and is threadedly connected to the threaded hole 15. In actual use, the bolt 1 can pass through two mounting holes 4 and then extend into the threaded hole 15 and be tightened to fix the two first perimeters 2 and the first connecting ring 10 together, thereby fixing the connecting cover 3 to the basin frame 13 and the dust cover 11, and fixing them securely.

[0032] Specifically, during installation, the worker installs the T-shaped iron 5 inside the connecting cover 3, then places the permanent magnet 6 onto the T-shaped iron 5, and then fixes the washer 7 to the permanent magnet 6. Next, the voice coil 8 is placed in the gap between the T-shaped iron 5 and the permanent magnet 6, and the spring 9 is connected to the end of the voice coil 8. Then, the dust cover 11 is placed on the outer surface of the frame 13, so that the second connecting ring 12 is connected to and glued to the second rim 16 on the frame 13. Simultaneously, the side of the first connecting ring 10 abuts against the side of the first rim 2 connected to the frame 13. Then, one end of the frame 13 is fixed to the side edge of the spring 9, so that the first rim 2 at the end of the connecting cover 3 abuts against the first connecting ring 10. Finally, bolts 1 are used to fix the two first rims 2 and the first connecting ring 10 together. Then, the paper cone 22 is moved into the basket frame 13, and one end of the paper cone 22 is connected to the spring 9. The dust cover 23 is then fixed inside the paper cone 22. In this way, the dust cover 11 can cover the side of the basket frame 13, and the dust cover 23 can cover the inside of the paper cone 22, preventing dust from entering the basket frame 13 and improving the dustproof effect. The mounting edge 18 connected to the bent part 19 at the other end of the paper cone 22 will be adhered to the side of the second edge 16 with adhesive. In this way, during use, the voice coil 8 drives the paper cone 22 to vibrate through the spring 9. The vibration will be transmitted to the bent part 19, which will buffer the vibration of the paper cone 22. This will reduce the severity of the bending at the connection between the edge of the paper cone 22 and the basket frame 13, reduce the fatigue at the connection between the paper cone 22 and the basket frame 13, and improve the performance.

[0033] Furthermore, such as Figure 2 As shown, a fixing ring 21 is connected to one side edge of the pressure ring 20, and a limiting ring 17 is provided along one side edge of the second perimeter 16. When the side of the pressure ring 20 abuts against the side of the second perimeter 16, the fixing ring 21 is located inside the limiting ring 17 and is glued to the limiting ring 17. The pressure ring 20 can be fixed on the second perimeter 16 through the connection between the fixing ring 21 and the limiting ring 17, thereby pressing and fixing the mounting perimeter 18, making it secure.

[0034] Furthermore, such as Figure 4As shown, the inner edge of the pressure ring 20 is arc-shaped. When the paper tray 22 vibrates, the bending part 19 will deform. During the deformation, the side of the bending part 19 will contact the inner surface of the pressure ring 20. With the arc-shaped setting, the bending part 19 can be limited to avoid the bending part 19 deforming too much, and the bending part 19 will not be worn by the edge of the pressure ring 20.

[0035] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A low-amplitude miniature loudspeaker, comprising a connecting cover (3), characterized in that: A T-shaped iron (5) is installed inside the connecting cover (3), and a permanent magnet (6) is fitted on the T-shaped iron (5). A washer (7) is connected to one side of the permanent magnet (6), and there is a gap between the T-shaped iron (5) and the permanent magnet (6). A voice coil (8) is provided in the gap. A frame (13) is provided on one side of the connecting cover (3). One end of the frame (13) is connected to the edge of the spring (9), and the neck of one side of the spring (9) is fixed on the voice coil (8). A paper cone (22) is glued inside the frame (13). One end of the paper cone (22) is fixed to the neck of the other side of the spring (9), and the other end edge of the paper cone (22) is connected to a bend (19). A mounting edge (18) is installed on the side edge of the bend (19). A second edge (16) is installed on one end of the frame (13). The outer edge of the mounting edge (18) extends to one side of the second edge (16) and is fixed to the second edge (16). A dust cover (11) is provided between the connecting cover (3) and the basin stand (13). One end of the dust cover (11) is connected to a first connecting ring (10). The adjacent ends of the connecting cover (3) and the basin stand (13) are both provided with a first rim (2). The first connecting ring (10) is located between the two first rims (2), and the three are fixed by a connecting mechanism. The other end of the dust cover (11) is connected to a second connecting ring (12), and the second connecting ring (12) is fixed on the side of the second rim (16).

2. The low-amplitude miniature loudspeaker according to claim 1, characterized in that: The connecting mechanism includes a number of mounting holes (4) on the side of the first perimeter (2) connected to the connecting cover (3) and the first connecting ring (10). Each pair of mounting holes (4) is provided with a bolt (1). The side of the first perimeter (2) connected to the basin frame (13) is provided with a number of threaded holes (15). The other end of each bolt (1) extends into the corresponding threaded hole (15) and is threadedly connected to the threaded hole (15).

3. The low-amplitude miniature loudspeaker according to claim 1, characterized in that: The end of the basin holder (13) away from the connecting cover (3) is provided with a pressure ring (20). The pressure ring (20) abuts against the adjacent surface of the second circumference (16), and a receiving groove (14) is provided on the side of the pressure ring (20) near the second circumference (16). A receiving cavity is formed between the receiving groove (14) and the side of the second circumference (16), and the mounting circumference (18) is located in the receiving cavity.

4. A low-amplitude miniature loudspeaker according to claim 3, characterized in that: A fixing ring (21) is connected to one side edge of the pressure ring (20), and a limiting ring (17) is provided along one side edge of the second perimeter (16). When the side of the pressure ring (20) abuts against the side of the second perimeter (16), the fixing ring (21) is located inside the limiting ring (17) and is glued to the limiting ring (17).

5. A low-amplitude miniature loudspeaker according to claim 1, characterized in that: The distance between the permanent magnet (6) and the T-shaped iron (5) is greater than the thickness of the voice coil (8), and there is a gap between the permanent magnet (6) and the T-shaped iron (5) and the surface of the voice coil (8).

6. A low-amplitude miniature loudspeaker according to claim 4, characterized in that: The inner edge of the pressure ring (20) is set in an arc shape.

7. A low-amplitude miniature loudspeaker according to claim 1, characterized in that: A dust cover (23) is coaxially provided inside the paper basin (22), and the edge of the dust cover (23) is fixedly connected to the inner wall of the paper basin (22).

8. A low-amplitude miniature loudspeaker according to claim 1, characterized in that: The bending part (19) is set in an "S" shape and is made of pulp material.

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