Choking coil for vehicle-mounted audio equipment
By using elastic guide and shrapnel structure in the choke, replacing the traditional spot welding connection, the problem of solder joint desoldering of the choke when the sound is vibrating is solved, and stable circuit board connection is achieved and the sound quality is improved.
Patent Information
- Application Number
- CN202422470986.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-14
- Publication Date
- 2025-08-26
- Estimated Expiration
- 2034-10-14
AI Technical Summary
The existing choke coil is prone to the problem of welding joints being disconnected when the audio is vibrating, which affects the sound quality.
The combined structure of the inductor coil, the elastic guide and the shrapnel is adopted, and the elastic guide is electrically in contact with the circuit board through the elastic guide, which replaces the traditional spot welding connection method, and uses the shrapnel and the elastic guide to eliminate vibration and reduce the influence of inertial force.
It effectively reduces the vibration impact of the connection between the choke coil and the circuit board, avoids the desoldering of the solder joints, and ensures the sound quality of the sound.
Smart Images
Figure CN223273087U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of electronic components, in particular to a choke coil used for vehicle-mounted audio equipment. Background Art
[0002] A choke is a common-mode interference suppression device with a ferrite core. The structure of an existing choke is that two coils of the same size and number of turns are symmetrically wound around the same ferrite ring core.
[0003] In audio systems, choke inductors are primarily used to isolate sound signals, separating high-frequency and low-frequency signals, thereby making the sound clearer and more natural when playing music. Increasing the size of the inductor can improve low-frequency performance and make the sound wider and fuller, while reducing the size of the inductor can transmit high-frequency signals more accurately, improving the details of musical instruments.
[0004] The choke is spot-welded to the speaker's circuit board. However, the sound emitted by the speaker during operation causes the speaker to vibrate, which can cause the solder joints between the choke and the circuit board to become desoldered and disconnected, causing the choke, which is used to optimize the speaker's sound quality, to stop functioning and deteriorate the speaker's sound quality. Utility Model Content
[0005] The purpose of the utility model is to provide a choke coil for vehicle-mounted audio equipment, which can reduce the influence of the vibration of the audio equipment on the connection between the inductor coil and the circuit board.
[0006] The technical solution adopted by a choke coil for a vehicle-mounted audio device disclosed in the utility model is:
[0007] It includes an inductor coil, a base plate and a mounting base, the inductor coil is fixedly connected to the base plate, a receiving groove is provided on the top of the mounting base, two elastic guide plates are installed in the receiving groove, the elastic guide plates pass through the mounting base, the base plate is placed in the receiving groove, the positive and negative poles of the inductor coil respectively touch the two elastic guide plates, a buckle extends from the bottom of the mounting base, the buckle is snapped into the mounting hole on the circuit board, the two elastic guide plates are respectively electrically in contact with the positive and negative poles of the circuit board, two spring plates are installed in the receiving groove, the two ends of the spring plates respectively touch the inner wall of the receiving groove and the base plate, and the two spring plates are close to the two ends of the mounting base.
[0008] As a preferred solution, both ends of the mounting seat are provided with mounting grooves, the mounting grooves are communicated with the receiving grooves, and the two spring pieces are respectively close to the two mounting grooves.
[0009] As a preferred solution, the cross-section of the spring sheet is V-shaped, and two first card slots and two second card slots are respectively provided at both ends of the spring sheet, the two first card slots are respectively close to the two sides of the spring sheet, and the two second card slots are respectively close to the two sides of the spring sheet, and two first limit blocks extend in the mounting groove, and the first limit blocks are fixed in the adjacent first card slots, and two second limit blocks extend on the bottom plate, and the second limit blocks are fixed in the adjacent second card slots.
[0010] As a preferred solution, a first through slot and a second through slot are provided on the spring piece, and the first through slot and the second through slot are respectively close to the two ends of the spring piece. Two third limit blocks extend from the inner wall of the receiving slot, and the third limit blocks are fixed in the adjacent first through slot. Two fourth limit blocks extend from the top of the base plate, and the fourth limit block is fixed in the adjacent second through slot.
[0011] As a preferred solution, the bottom of the receiving groove is penetrated by two through holes, the cross-section of the elastic guide piece is U-shaped, the middle part of the elastic guide piece passes through the mounting seat through the through hole, and both ends of the elastic guide piece are clamped on the edge of the through hole.
[0012] As a preferred solution, the inductor coil includes a first winding, a second winding and a magnetic ring, the first winding and the second winding are both wound on the outside of the magnetic ring, both ends of the first winding pass through the bottom plate, the two ends of the first winding are respectively close to the two sides of the bottom plate, and the two ends of the first winding respectively touch one end of the two elastic guide plates, both ends of the second winding pass through the bottom plate, the two ends of the second winding are respectively close to the two sides of the bottom plate, and the two ends of the second winding respectively touch the other end of the two elastic guide plates.
[0013] The beneficial effects of a choke coil for a vehicle-mounted audio device disclosed in the utility model are:
[0014] Install the mounting base's clip on the circuit board with the mounting hole, so that the two elastic guides on the mounting base touch the positive and negative poles of the circuit board respectively, and push the elastic guides into the mounting base; the two elastic guides push the positive and negative poles of the inductor coil respectively, causing the inductor coil and the bottom plate to rise in the mounting base and compress the elastic sheet;
[0015] When the speaker is running and vibrating, the downward thrust of the spring and the upward thrust of the elastic guide put the bottom plate in a suspended state. The spring and the elastic guide can eliminate most of the vibration transmitted to the bottom plate. Since most of the weight of the choke is located on the inductor, the inertial force generated by the inductor during vibration is reduced, which can effectively reduce the impact of vibration on the connection between the choke and the circuit board.
[0016] When the spring pushes the bottom plate to compress the elastic guide, the elastic guide makes electrical contact with the circuit board, replacing the traditional spot welding connection method to avoid the problem of solder joints becoming desoldered due to vibration. When the circuit board transmits the vibration to the elastic guide, part of the vibration energy is eliminated by the elasticity of the elastic guide itself, further reducing the impact of vibration on the firmness of the connection between the choke and the circuit board. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 The utility model is a structural schematic diagram of a choke coil used for vehicle-mounted audio equipment.
[0018] Figure 2 The utility model is a schematic diagram of the installation of a choke coil used for vehicle audio equipment.
[0019] Figure 3 The utility model is a cross-sectional view of a mounting base and a bottom plate of a choke coil used for vehicle-mounted audio equipment.
[0020] Figure 4 The utility model is a schematic structural diagram of a mounting base for a choke coil used in vehicle audio equipment.
[0021] Figure 5 The utility model is a schematic diagram of the installation of a shrapnel of a choke coil used for vehicle audio equipment.
[0022] Figure 6 The utility model is a cross-sectional view of a mounting base of a choke coil for vehicle-mounted audio equipment. DETAILED DESCRIPTION
[0023] The present invention will be further described and explained below in conjunction with specific embodiments and accompanying drawings:
[0024] Please refer to Figure 1 and Figure 2 .
[0025] The utility model discloses a choke for a vehicle-mounted audio device, comprising a circuit board 1, an inductor 2, a base plate 3, and a mounting base 4. The circuit board 1 is provided with a plurality of mounting holes, which pass through the circuit board 1. In this embodiment, two mounting holes are preferably provided, and the positive and negative poles of the circuit board 1 are both located between the two mounting holes.
[0026] Please refer to Figure 3 and Figure 4 .
[0027] The inductor 2 includes a first winding 21, a second winding 22, and a magnetic ring 23. In this embodiment, the first winding 21 and the second winding 22 are preferably copper wires. In this embodiment, the magnetic ring 23 is preferably a hollow ring. The first winding 21 and the second winding 22 are both wound around the outside of the magnetic ring 23. Each time the first winding 21 and the second winding 22 are wound around the outside of the magnetic ring 23, they pass through the center of the magnetic ring 23.
[0028] Furthermore, the inductor 2 is fixedly connected to the bottom plate 3, and the inductor 2 is fixedly connected to the top of the bottom plate 3 by glue; both ends of the first winding 21 pass through the bottom plate 3, and the two ends of the first winding 21 are respectively close to the two sides of the bottom plate 3, and both ends of the second winding 22 pass through the bottom plate 3, and the two ends of the second winding 22 are respectively close to the two sides of the bottom plate 3, and both ends of the first winding 21 and the two ends of the second winding 22 are located at the bottom of the bottom plate 3;
[0029] Furthermore, two second limit blocks 312 are extended from the top of the bottom plate 3, and the two second limit blocks 312 are respectively close to the two ends of the bottom plate 3. The second limit blocks 312 are provided with an inclined surface, and the inclined surface is away from the inductor coil 2; two fourth limit blocks 314 are extended from the top of the bottom plate 3, and the two fourth limit blocks 314 are respectively close to the two ends of the bottom plate 3.
[0030] Please refer to Figure 1-Figure 5 .
[0031] The top of the mounting seat 4 is provided with a receiving groove, and the bottom of the receiving groove is provided with two through holes, which pass through the mounting seat 4;
[0032] Furthermore, two elastic guides 42 are installed in the receiving groove. In this embodiment, the cross section of the elastic guide 42 is preferably U-shaped. The middle portion of the elastic guide 42 passes through the mounting seat 4 through the through hole, and the middle portion of the elastic guide 42 protrudes from the bottom of the mounting seat 4. Both ends of the elastic guide 42 are clamped on the edge of the through hole to prevent the elastic guide 42 from falling out of the through hole.
[0033] Furthermore, mounting grooves 41 are formed at both ends of the mounting base 4, and the mounting grooves 41 are connected to the receiving grooves. Two first limit blocks 411 extend from the mounting grooves 41, and the first limit blocks 411 are close to the top of the mounting base 4, and the two first limit blocks 411 are close to the two sides of the mounting base 4 respectively; a notch is formed on the edge of the mounting groove 41, and the notch is close to the top of the mounting base 4, and the notch facilitates the user to remove the spring clip 43; two third limit blocks 413 extend from the inner wall of the receiving groove, and the two third limit blocks 413 are close to the two ends of the mounting base 4 respectively;
[0034] The bottom plate 3 is placed in the receiving groove, the positive and negative poles of the inductor coil 2 respectively touch the two elastic guide plates 42, the two ends of the first winding 21 respectively touch one end of the two elastic guide plates 42, and the two ends of the second winding 22 respectively touch the other end of the two elastic guide plates 42.
[0035] Please refer to Figure 2 、 Figure 3 and Figure 6 .
[0036] Two spring pieces 43 are installed in the receiving groove. In this embodiment, the cross-section of the spring piece 43 is preferably V-shaped. Two first slots 431 and two second slots 432 are respectively defined at both ends of the spring piece 43. The two first slots 431 are respectively close to the two sides of the spring piece 43, and the two second slots 432 are respectively close to the two sides of the spring piece 43. A first through slot 433 and a second through slot 434 are defined on the spring piece 43. The first through slot 433 and the second through slot 434 are respectively close to the two ends of the spring piece 43.
[0037] The bend of the spring piece 43 is inserted into the receiving slot through the installation slot 41. First, the first limiting block 411 on one end of the spring piece 43 is inserted into the adjacent first locking slot 431 to fix it. Then, the other end of the spring piece 43 is pushed to slide on the two inclined surfaces so that the second limiting block 312 is inserted into the adjacent second locking slot 432 to fix it. The inclined surfaces can facilitate the second limiting block 312 to be inserted into the second locking slot 432 when installing the spring piece 43. The first limiting block 411 and the second limiting block 312 limit the spring piece 43 in the installation slot 41.
[0038] The third limiting block 413 is fixed in the adjacent first through-slot 433, and the fourth limiting block 314 is fixed in the adjacent second through-slot 434. The third limiting block 413 and the fourth limiting block 314 can prevent the two spring pieces 43 from sliding deeper into the receiving groove, thereby preventing the spring pieces 43 from contacting the inductor 2.
[0039] The two ends of the spring piece 43 respectively contact the inner wall of the receiving groove and the top of the bottom plate 3. The spring piece 43 pushes the bottom plate 3 toward the elastic guide piece 42, so that the inductor 2 compresses the elastic guide piece 42.
[0040] A clip 44 extends from the bottom of the mounting base 4, and the clip 44 is snapped into the mounting hole on the circuit board 1, thereby fixing the mounting base 4 on the circuit board 1. The two elastic guides 42 are respectively in electrical contact with the positive and negative poles of the circuit board 1. The circuit board 1 guides the current to the inductor 2 through the elastic guides 42.
[0041] When the speaker is started and running, the sound it emits generates vibrations, which are transmitted to the mounting base 4 through the circuit board 1. The downward pressure exerted by the spring piece 43 on the bottom plate 3 and the upward thrust exerted by the elastic guide piece 42 on the bottom plate 3 cause the bottom plate 3 to be suspended in the receiving cavity. Most of the vibrations are eliminated by the spring piece 43 and the elastic guide piece 42 when being transmitted to the bottom plate 3, thereby reducing the inertial force of the inductor coil 2, the heaviest part of the choke coil, during vibration, and effectively reducing the impact of the vibration on the firmness of the connection between the choke coil and the circuit board 1.
[0042] When the bottom plate 3 vibrates upward, the elastic guide piece 42 utilizes its own resilience to ensure that the elastic guide piece 42 can always be in electrical contact with the inductor coil 2 to avoid disconnection;
[0043] The mounting base 4 is connected to the circuit board 1 by means of a snap 44, and the connection between the elastic guide piece 42 and the circuit board 1 is made by electrical contact, replacing the traditional spot welding connection method, so that the choke can have a small movement space when vibrating, to avoid the problem of solder joints becoming desoldered due to vibration; when the circuit board 1 transmits the vibration to the elastic guide piece 42, part of the vibration energy can be eliminated by the elasticity of the elastic guide piece 42 itself, further reducing the influence of the vibration on the firmness of the connection between the choke and the circuit board 1.
[0044] The utility model provides a choke coil for vehicle-mounted audio equipment. The buckle of the mounting base is mounted on a circuit board with a mounting hole, so that two elastic guides on the mounting base respectively touch the positive and negative poles of the circuit board and push the elastic guides into the mounting base. The two elastic guides respectively push the positive and negative poles of the inductor coil, so that the inductor coil and the bottom plate rise in the mounting base and compress the elastic sheet.
[0045] When the speaker is running and vibrating, the downward thrust of the spring and the upward thrust of the elastic guide put the bottom plate in a suspended state. The spring and the elastic guide can eliminate most of the vibration transmitted to the bottom plate. Since most of the weight of the choke is located on the inductor, the inertial force generated by the inductor during vibration is reduced, which can effectively reduce the impact of vibration on the connection between the choke and the circuit board.
[0046] When the spring pushes the bottom plate to compress the elastic guide, the elastic guide makes electrical contact with the circuit board, replacing the traditional spot welding connection method to avoid the problem of solder joints becoming desoldered due to vibration. When the circuit board transmits the vibration to the elastic guide, part of the vibration energy is eliminated by the elasticity of the elastic guide itself, further reducing the impact of vibration on the firmness of the connection between the choke and the circuit board.
[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit the scope of protection of the utility model. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the utility model.
Claims
1. A choke coil for an in-vehicle audio device, comprising a circuit board having a plurality of mounting holes therethrough, characterized in that: Also included are the inductor coil, base plate, and mounting base; The inductor coil is fixedly connected to the base plate; A receiving groove is provided on the top of the mounting seat, and two elastic guide plates are installed in the receiving groove. The elastic guide plates pass through the mounting seat, and the bottom plate is placed in the receiving groove. The positive and negative poles of the inductor coil respectively touch the two elastic guide plates. A buckle extends from the bottom of the mounting seat, and the buckle is snapped into the mounting hole on the circuit board. The two elastic guide plates are respectively electrically in contact with the positive and negative poles of the circuit board. Two spring plates are installed in the receiving groove, and the two ends of the spring plates respectively touch the inner wall and the bottom plate of the receiving groove, and the two spring plates are close to the two ends of the mounting seat.
2. A choke coil for a car audio device according to claim 1, characterized in that: Both ends of the mounting seat are provided with mounting grooves, the mounting grooves are communicated with the receiving grooves, and the two spring pieces are respectively close to the two mounting grooves.
3. A choke coil for a car audio device according to claim 2, characterized in that: The cross-section of the spring sheet is V-shaped, and two first slots and two second slots are respectively provided at both ends of the spring sheet. The two first slots are close to the two sides of the spring sheet, and the two second slots are close to the two sides of the spring sheet. Two first limit blocks extend in the mounting groove, and the first limit blocks are fixed in the adjacent first slots. Two second limit blocks extend on the bottom plate, and the second limit blocks are fixed in the adjacent second slots.
4. A choke coil for a car audio device as claimed in claim 3, characterized in that: The spring piece is provided with a first through slot and a second through slot, the first through slot and the second through slot being close to the two ends of the spring piece respectively, the inner wall of the receiving slot is extended with two third limit blocks, the third limit blocks are fixedly inserted into the adjacent first through slot, and the top of the base plate is extended with two fourth limit blocks, the fourth limit blocks are fixedly inserted into the adjacent second through slot.
5. A choke coil for a car audio device as claimed in claim 4, characterized in that: The bottom of the receiving groove is penetrated by two through holes. The cross section of the elastic guide piece is U-shaped. The middle part of the elastic guide piece passes through the mounting seat through the through hole. Both ends of the elastic guide piece are clamped on the edge of the through hole.
6. A choke coil for a car audio device according to claim 5, characterized in that: The inductor coil includes a first winding, a second winding and a magnetic ring. The first winding and the second winding are both wound on the outside of the magnetic ring. Both ends of the first winding pass through the bottom plate, and the two ends of the first winding are respectively close to the two sides of the bottom plate. The two ends of the first winding respectively touch one end of the two elastic guide plates. Both ends of the second winding pass through the bottom plate, and the two ends of the second winding are respectively close to the two sides of the bottom plate. The two ends of the second winding respectively touch the other end of the two elastic guide plates.