Welding jig for directly connecting microphone pickup element pin with PCBA (Printed Circuit Board Assembly)

Abstract

The utility model discloses a welding jig for a microphone pickup element pin directly connected with a PCBA (Printed Circuit Board Assembly). The welding jig comprises a base, a lifting plate and a driving source, wherein the base is provided with a device mounting position, and the device mounting position is used for accommodating a microphone pickup element; a pin of the microphone pickup element is exposed from the device mounting position; the lifting plate is used for placing a PCB (Printed Circuit Board) and is positioned below the microphone pickup element; and the driving source and the lifting plate are arranged in a linkage mode, and the driving source is used for driving the lifting plate to move towards the microphone pickup element and enabling the to-be-welded position on the PCB to be in contact with a pin of the microphone pickup element. According to the technical scheme provided by the utility model, lead connection is not needed, the problems of interference and signal distortion caused by leads are avoided, reliable connection is provided, and the difficulty and complexity of assembly are reduced.

Description

Technical Field

[0001] This utility model relates to the field of processing technology for wireless microphones and wired microphones, and in particular to a soldering fixture for direct connection of microphone pickup element pins to PCBA. Background Technology

[0002] In traditional condenser microphone designs, the microphone pickup element is typically connected directly to the PCBA (Printed Circuit Board Assemble) via leads. While this ensures effective signal transmission, it results in a less compact device design. Specifically, the leads occupy significant space, increasing the overall design complexity. Furthermore, because audio signals are transmitted through leads, which involve long transmission distances and times, or if the leads are placed within confined space for other electronic components, the audio signal is highly susceptible to interference from other components during transmission, leading to signal distortion.

[0003] Furthermore, the presence of leads during microphone assembly increases the difficulty and complexity of the assembly process, as a mounting location must be found that ensures the leads are not damaged while guaranteeing a highly reliable connection. Utility Model Content

[0004] To overcome the shortcomings of existing technologies, a soldering fixture for direct connection of microphone pickup element pins to PCBA is proposed.

[0005] A soldering fixture for direct connection of microphone pickup element pins to a PCBA includes a base, a lifting plate, and a driver source; wherein,

[0006] The base is provided with a device mounting position for accommodating a microphone pickup element; the pins of the microphone pickup element are exposed from the device mounting position.

[0007] The lifting plate is used to place the PCB board and is located below the microphone pickup element;

[0008] The drive source is linked to the lifting plate. The drive source is used to drive the lifting plate to move toward the microphone pickup element and make the soldering position on the PCB board contact the pin of the microphone pickup element.

[0009] Preferably, the drive source includes a motor; the base is L-shaped and includes a vertical section and a horizontal section; the vertical section is provided with a mounting position for the device; the horizontal section is used to support the lifting plate;

[0010] The base has an inner cavity in which a lifting shaft, a transmission assembly, and a motor are disposed; the transmission assembly is used to link the lifting shaft and the motor together, and to make the lifting shaft perpendicular to the lifting plate; a through slot is provided on the vertical section, and a part of the lifting plate passes through the through slot and connects to the lifting shaft;

[0011] When the motor is working, the transmission assembly drives the lifting plate to move closer to or away from the microphone pickup element along the lifting shaft.

[0012] Preferably, the lifting shaft is a lead screw with a nut for connecting to the lifting plate; the transmission assembly includes two meshing helical gears, one of which is located at the lower end of the lead screw and the other is connected to the motor.

[0013] Preferably, the lifting shaft, transmission assembly and motor constitute a welding pre-positioning unit, and two or more welding pre-positioning units are provided on the base; all welding pre-positioning units are driven connected to the same lifting plate, and all welding pre-positioning units synchronously drive the movement of the lifting plate.

[0014] Preferably, the motor is a bidirectional output motor, and there are two transmission components and two lifting shafts, which are respectively disposed at both ends of the bidirectional output motor.

[0015] Preferably, at least one guide post is provided on the horizontal section, and the lifting plate is slidably adapted to the guide post.

[0016] Preferably, the device mounting position includes a receiving groove and a limiting component disposed within the receiving groove; the limiting component includes a limiting plate, an elastic element, a limiting block, and a mounting base; wherein,

[0017] The limiting block is disposed on the mounting base, one side of the limiting block abuts against the inner wall of the receiving groove through the elastic element, and the other side of the limiting block is used to abut against the microphone pickup element; the limiting plate is disposed on the side away from the mounting base;

[0018] When the microphone pickup element is placed in the receiving slot, the elastic member presses the limiting block, driving the microphone pickup element to move toward the limiting plate until the microphone pickup element is clamped by the limiting block and the limiting plate.

[0019] Preferably, the receiving groove is conical, with a narrow end near the lifting plate. When the microphone pickup element is placed in the receiving groove, the circumferential edge sidewall of the microphone pickup element is tangentially abutted against the inclined sidewall of the receiving groove.

[0020] Preferably, a distance baffle is provided on the base, and a distance sensor is provided on the lifting plate; when the lifting plate moves toward the microphone pickup element, the distance sensor and the distance baffle are used to obtain the relative welding position of the soldering position on the PCB board and the pin of the microphone pickup element.

[0021] Preferably, the distance sensor includes a laser sensor or an infrared sensor.

[0022] This utility model provides a soldering fixture for direct connection of microphone pickup element pins to a PCBA. A drive source moves a lifting plate, facilitating direct, intuitive, and precise connection between the soldering positions on the PCB and the microphone pickup element pins. Once the pins contact the PCB solder joints, external operators can use methods such as holding and operating the soldering tube / SMT soldering / automatic spot soldering to solder the pins onto the PCB. Parameter adjustment and confirmation effectively improve the soldering effect between the pins and the PCB. In other words, no lead wire connection is required, avoiding interference and signal distortion caused by leads, providing a reliable connection, and reducing assembly difficulty and complexity.

[0023] Compared with the prior art, the technical solution provided by this utility model can not only effectively reduce the space occupied by the device, but also simplify the microphone assembly process, improve the convenience and efficiency of assembly, and maintain or improve the reliability of microphone performance, so as to meet the needs of modern electronic devices for compactness and portability. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of a soldering fixture for directly connecting the pins of a microphone pickup element to a PCBA in an embodiment of this utility model;

[0025] Figure 2 This is a schematic diagram of the guide post on the base in an embodiment of this utility model;

[0026] Figure 3 This is a schematic diagram of the distance baffle on the base in an embodiment of this utility model;

[0027] Figure 4 This is a schematic diagram of the distance baffle and distance sensor on the base in an embodiment of this utility model;

[0028] Figure 5 This is a schematic diagram of a fixture with a distance baffle and a distance sensor in an embodiment of this utility model;

[0029] Figure 6 This is a schematic diagram of a fixture with a limiting component in an embodiment of the present invention;

[0030] Figure 7This is another schematic diagram of the fixture with limit components in an embodiment of this utility model;

[0031] Figure 8 This is a schematic diagram of the use of the limiting component in an embodiment of this utility model;

[0032] Figure 9 This is another schematic diagram showing the use of the limiting component in this utility model embodiment;

[0033] The markings in the accompanying drawings are as follows:

[0034] 1. Base; 11. Vertical section; 12. Horizontal section; 13. Through slot; 14. Receiving slot; 15. Distance baffle; 2. Lifting plate; 21. Distance sensor; 3. Drive source; 4. Microphone pickup element; 41. Pin; 5. PCB board; 51. Soldering position; 6. Lifting shaft; 61. Nut; 7. Transmission assembly; 71. Helical gear; 8. Guide post; 9. Limiting assembly; 91. Limiting plate; 92. Elastic element; 93. Limiting block; 94. Mounting base; 95. Fixing block; 96. Slide groove. Detailed Implementation

[0035] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0036] A soldering fixture is provided for direct connection of microphone pickup element pins to a PCBA, such as... Figures 1 to 9 As shown, the device includes: a base 1, a lifting plate 2, and a drive source 3. The base 1 has a mounting position for accommodating a microphone pickup element 4; typical microphone pickup elements such as microphone cores are suitable. The pins 41 of the microphone pickup element 4 protrude from the mounting position for easy soldering to the PCB pads. The lifting plate 2 holds a PCB board 5 and is located below the microphone pickup element 4. The drive source 3 is linked to the lifting plate 2, driving the lifting plate 2 to move towards the microphone pickup element 4 and bringing the soldering position 51 on the PCB board 5 into contact with the pins 41 of the microphone pickup element 4. The drive source 3 can be a motor and a drive component that works with the motor, but is not limited to these.

[0037] Taking a microphone cartridge as an example, during use, after the microphone cartridge is installed, pin 41 extends horizontally. After the PCB board 5 is placed, its solder joints / pads are directly below the microphone cartridge pin 41. The drive source 3 drives the lifting plate 2 to move, so that pin 41 contacts the PCB solder joint. Then, an external operator can solder pin 41 onto the PCB by holding the operating tube / SMT soldering / automatic spot soldering, etc. That is, by controlling the position of the lifting plate 2 through automated adjustment equipment, the positional relationship between the PCB board 5 and the microphone cartridge pin 41 can be directly, intuitively, and accurately confirmed through parameter adjustment, effectively improving the soldering effect between the microphone cartridge pin 41 and the PCB.

[0038] In one implementation, the base 1 is L-shaped and includes a vertical section 11 and a horizontal section 12. The vertical section 11 has a mounting position for components; the horizontal section 12 supports the lifting plate 2. The base 1 has an inner cavity, which is also L-shaped. A lifting shaft 6, a transmission assembly 7, and a motor are disposed within the inner cavity, with the motor serving as the drive source. The lifting shaft 6 and transmission assembly 7 correspond to drive components that cooperate with the motor. The transmission assembly 7 is used to link the lifting shaft 6 and the motor, and to ensure that the lifting shaft 6 is perpendicular to the lifting plate 2. A through slot 13 is provided on the vertical section 11 so that a portion of the lifting plate 2 passes through the through slot 13 and connects to the lifting shaft 6. When the motor operates, the transmission assembly 7 drives the lifting plate 2 to move closer to or further away from the microphone pickup element 4 along the lifting shaft 6.

[0039] Furthermore, the lifting shaft 6 is a lead screw with a nut 61 for connecting to the lifting plate 2; the transmission assembly 7 includes two meshing helical gears 71, one of which is located at the lower end of the lead screw, and the other is connected to the motor. When the motor is working, the helical gear 71 at one end of the motor drives the helical gear 71 at the other end of the lead screw to move, thereby driving the lifting plate 2 to move up and down.

[0040] Furthermore, a welding pre-positioning unit is formed by the lifting shaft 6, the transmission component 7, and the motor. Two or more welding pre-positioning units are provided on the base 1. All welding pre-positioning units are driven and connected to the same lifting plate. All welding pre-positioning units drive the movement of the lifting plate synchronously. That is, the number of lead screws, through slots 13, nuts 61, transmission components 7, and motors can be two or more. Two sets of lead screws are rotatably connected to both ends of the inner wall of the vertical section 11 and symmetrically distributed at both ends of the device installation position. The motors, transmission components 7, nuts 61, and through slots 13 are arranged one by one according to the lead screws.

[0041] Alternatively, the motor is a bidirectional output motor, and there are two transmission components 7 and lifting shafts 6, respectively located at both ends of the bidirectional output motor. That is, there is one set of motors, and a bidirectional output gearbox is installed between the motors. The two output ends of the bidirectional output gearbox are respectively driven and connected to the transmission components 7.

[0042] Furthermore, at least one guide post 8 is provided on the horizontal segment 12, and the lifting plate 2 is slidably adapted to the guide post 8. Specifically, guide posts 8 are provided on the top surface of the horizontal segment 12 of the base 1 or the bearing surface of the PCB board 5 and the lifting plate 2. The circumferential edge of the lifting plate 2 is slidably adapted to all guide posts 8, and a limiting groove for limiting the PCB is provided at the center of the lifting plate 2. The guide posts 8 and the limiting groove facilitate the positioning and fixing between the lifting plate 2 and the base 1, and between the lifting plate 2 and the PCB board 5.

[0043] In one implementation, a distance baffle 15 is provided on the base 1, and a distance sensor 21 is provided on the lifting plate 2; when the lifting plate 2 moves toward the microphone pickup element 4, the distance sensor 21 and the distance baffle 15 are used to obtain the relative position of the soldering position 51 on the PCB board 5 and the pin 41 of the microphone pickup element 4; wherein, the distance sensor 21 includes a laser sensor or an infrared sensor, but is not limited to these.

[0044] During use, the lifting plate 2 moves, causing the distance sensor 21 to move, thus changing the distance between the output of the distance sensor 21 and the distance baffle 15. During the initial soldering, the operator adjusts the number of motor rotations and manually identifies / determines the optimal soldering height of the microphone pin 41 relative to the corresponding PCB. After adjustment, the host computer records the distance parameters captured by the distance sensor 21, obtains the preset height parameters, and records them as the optimal soldering adjustment parameters for the corresponding microphone pin and PCB. In subsequent soldering operations, when the lifting plate 2 carries the corresponding PCB and microphone pin 41, the operator only needs to retrieve the corresponding parameters from the host computer. The distance sensor 21, through monitoring the distance parameters, ensures that the microphone pin and PCB are in the optimal position each time soldering is performed.

[0045] In this implementation, the distance sensor adjustment system allows the position data captured by the sensor after the initial welding to serve as a precise reference for adjusting the position of the corresponding model. With this design, the welding fixture can move precisely to the preset position according to the parameters input by the operator each time it is started, or even each time welding, ensuring that the welding of different models of mic pins can be in the optimal position.

[0046] In one implementation, the device mounting position includes a receiving groove 14 and a limiting component 9 disposed within the receiving groove 14; the limiting component 9 includes a limiting plate 91, an elastic element 92, a limiting block 93, and a mounting base 94; wherein, the limiting block 93 is disposed on the mounting base 94, one side of the limiting block 93 abuts against the inner wall of the receiving groove 14 through the elastic element 92, and the other side of the limiting block 93 is used to abut against the microphone pickup element 4; the limiting plate 91 is disposed on the side away from the mounting base 94; when the microphone pickup element 4 is placed in the receiving groove 14, the elastic element 92 presses the limiting block 93, driving the microphone pickup element 4 to move toward the limiting plate 91 until the microphone pickup element 4 is clamped by the limiting block 93 and the limiting plate 91.

[0047] Specifically, the mounting base 94 is disposed on the outer side wall of the base 1 away from the lifting plate 2. The mounting base 94 is provided with a cavity, and a fixing block 95 is provided on the side wall of the cavity. A sliding groove 96 is provided on the side wall of the fixing block 95. The end of the limiting block 93 is slidably connected in the sliding groove 96. The elastic element 92 is a spring. The two ends of the elastic element 92 abut against the limiting block 93 and the inner wall of the mounting base 94, respectively. The elastic element 92 always drives the limiting block 93 away from the inner wall of the mounting base 94. Driven by the elastic element 92, the end of the limiting block 93 can move into the receiving groove 14 and abut against the end of the microphone core. Driven by the elastic element 92, the limiting block 93 pushes the microphone core towards the end of the receiving groove 14 until the microphone core abuts against the limiting plate 91 disposed on the edge of the receiving groove 14 away from the mounting base 94. The limiting block 93 cooperates with the limiting plate 91 to clamp the microphone core in the receiving groove 14.

[0048] When there are two or more sets of lead screws, through slots 13, nuts 61, transmission components 7 and motors, the two sets of lead screws are rotatably connected to both ends of the inner wall of the vertical section 11 and symmetrically distributed at both ends of the receiving slot 14. The motors, transmission components 7, nuts 61 and through slots 13 are arranged one by one according to the lead screws.

[0049] In this implementation, an elastic limiting structure is used as the core limiting method, which is beneficial for adapting to cores of different thicknesses. During installation, it is only necessary to push the end of the core to the limiting block to overcome the elastic force of the elastic element so that the core is located in the receiving groove. Then, the core is released, and the limiting block pushes the core towards the limiting plate until it is clamped by the limiting block, preventing the core from shaking during welding and affecting the welding effect. Moreover, cores of different thicknesses and sizes can be adapted through the elastic element, thereby improving the practicality of the welding fixture.

[0050] Furthermore, the receiving groove 14 is conical, with a narrow end near the lifting plate 2. When the microphone pickup element 4 is placed in the receiving groove 14, the circumferential edge sidewall of the microphone pickup element 4 tangentially abuts against the inclined sidewall of the receiving groove 14. The conical groove structure serves as the microphone core receiving position, and the inclined sidewall always has corresponding contact points along its length that abut against the circumferential sidewall of the microphone core, providing support and effectively accommodating microphone cores of different sizes.

[0051] The above is a description of the soldering fixture for direct connection of microphone pickup element pins to PCBA according to this utility model, which is used to help understand this utility model; however, the implementation of this utility model is not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the principle of this utility model shall be considered as equivalent substitutions and shall be included within the protection scope of this utility model.

Claims

1. A soldering fixture for direct connection of microphone pickup element pins to a PCBA, characterized in that, Includes a base, a lifting platform, and a drive source; among which, The base is provided with a device mounting position for accommodating a microphone pickup element; the pins of the microphone pickup element are exposed from the device mounting position. The lifting plate is used to place the PCB board and is located below the microphone pickup element; The drive source is linked to the lifting plate. The drive source is used to drive the lifting plate to move toward the microphone pickup element and make the soldering position on the PCB board contact the pin of the microphone pickup element.

2. The soldering fixture for direct connection of microphone pickup element pins to PCBA as described in claim 1, characterized in that, The drive source includes a motor; the base is L-shaped and includes a vertical section and a horizontal section; the vertical section is provided with a mounting position for the device; the horizontal section is used to support the lifting plate; The base has an inner cavity in which a lifting shaft, a transmission assembly, and a motor are disposed; the transmission assembly is used to link the lifting shaft and the motor together, and to make the lifting shaft perpendicular to the lifting plate; a through slot is provided on the vertical section, and a part of the lifting plate passes through the through slot and connects to the lifting shaft; When the motor is working, the transmission assembly drives the lifting plate to move closer to or away from the microphone pickup element along the lifting shaft.

3. The soldering fixture for direct connection of microphone pickup element pins to PCBA as described in claim 2, characterized in that, The lifting shaft is a lead screw with a nut for connecting to the lifting plate. The transmission assembly includes two meshing helical gears, one of which is located at the lower end of the lead screw and the other is connected to the motor.

4. The soldering fixture for direct connection of microphone pickup element pins to PCBA as described in claim 2, characterized in that, The lifting shaft, transmission components, and motor constitute a welding pre-positioning unit. Two or more welding pre-positioning units are provided on the base. All welding pre-positioning units are driven and connected to the same lifting plate, and all welding pre-positioning units synchronously drive the movement of the lifting plate.

5. The soldering fixture for direct connection of microphone pickup element pins to PCBA as described in claim 2, characterized in that, The motor is a bidirectional output motor, and there are two transmission components and two lifting shafts, which are respectively located at both ends of the bidirectional output motor.

6. The soldering fixture for direct connection of microphone pickup element pins to PCBA as described in claim 2, characterized in that, At least one guide post is provided on the horizontal section, and the lifting plate is slidably adapted to the guide post.

7. The soldering fixture for direct connection of microphone pickup element pins to a PCBA as described in claim 1, characterized in that, The device mounting position includes a receiving groove and a limiting component disposed within the receiving groove; the limiting component includes a limiting plate, an elastic element, a limiting block, and a mounting base; wherein... The limiting block is disposed on the mounting base, one side of the limiting block abuts against the inner wall of the receiving groove through the elastic element, and the other side of the limiting block is used to abut against the microphone pickup element; the limiting plate is disposed on the side away from the mounting base; When the microphone pickup element is placed in the receiving slot, the elastic member presses the limiting block, driving the microphone pickup element to move toward the limiting plate until the microphone pickup element is clamped by the limiting block and the limiting plate.

8. The soldering fixture for direct connection of microphone pickup element pins to PCBA as described in claim 7, characterized in that, The receiving groove is conical in shape, with a narrow end near the lifting plate. When the microphone pickup element is placed in the receiving groove, the circumferential edge sidewall of the microphone pickup element is tangentially abutted against the inclined sidewall of the receiving groove.

9. The soldering fixture for direct connection of microphone pickup element pins to a PCBA as described in any one of claims 1 to 8, characterized in that, A distance baffle is provided on the base, and a distance sensor is provided on the lifting plate; when the lifting plate moves toward the microphone pickup element, the distance sensor and the distance baffle are used to obtain the relative position of the soldering position on the PCB board to be soldered with the pin of the microphone pickup element.

10. The soldering fixture for direct connection of microphone pickup element pins to a PCBA as described in claim 9, characterized in that, The distance sensor includes a laser sensor or an infrared sensor.

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