Stable audio transformer

Abstract

The utility model relates to a stable audio transformer which comprises a shell and a cover body installed on the shell, an installation chamber used for installing a framework is arranged in the shell, the framework is fixedly arranged in the installation chamber, pins are arranged on the framework, and one end of each pin penetrates through the cover body to be fixedly connected with an external PCB. A connecting block and a positioning column which are different in cross section shape are integrally formed on the framework, the connecting block and the positioning column are arranged on the framework in a diagonal mode, the connecting block and the positioning column are adjacent to the pins and penetrate through the cover body to extend to the outer side of the shell, and in the state that the connecting block and the positioning column are fixed to an external PCB, the connecting block and the positioning column penetrate through the PCB and form anchor points on one side of the PCB. The connecting blocks and the positioning columns with different cross section shapes are integrally formed on the fixed base, and in the process of combining the audio transformer with the PCB, the consistency of the mounting direction of the audio transformer is ensured through the matching of the connecting blocks and the positioning columns. And meanwhile, anchor points are formed on the end parts of the connecting blocks and the positioning columns, so that the phenomenon of looseness between the pins and the PCB is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of audio transformers, in particular to a stable audio transformer. Background Art

[0002] Audio transformers are miniature transformers used in audio circuits. Their main structure consists of a magnetic core, a primary coil, and a secondary coil. The primary and secondary coils are wound around the core and tightly coupled to form a winding. The main function of an audio transformer is to balance audio signals and boost or buck the voltage of audio circuits.

[0003] Audio circuits include audio transformers and a variety of other electronic components. Both the components and the audio transformer are soldered to the PCB. Several issues arise during the soldering process. The first is the orientation of the audio transformer during assembly. The second is ensuring full contact between the audio transformer and the PCB before soldering pin 04 to the PCB. The soldering between pin 04 and the PCB ensures the transformer's stability. To address the first issue, a common solution is to incorporate orientation markings on the audio transformer housing during production. This allows operators or mechanical devices to determine the correct installation orientation. However, both manual and mechanical methods can lead to misidentification. To address the second issue, a common solution involves applying pressure to the transformer housing during soldering, maintaining this pressure until all pins are soldered. Since the audio transformer's PCB is connected solely to the pins, applying external force to the transformer can cause the pins to loosen from the PCB. Summary of the Invention

[0004] The purpose of the present invention is to provide a stable audio transformer to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned objectives, the technical solution adopted by the present invention is: a stable audio transformer, comprising a shell and a cover mounted on the shell, an installation chamber for installing a skeleton is provided in the shell, the skeleton is fixedly installed in the installation chamber, the skeleton is provided with pins, one end of the pins passes through the cover and is fixedly connected to the external PCB; the skeleton is integrally formed with connecting blocks and positioning posts of different cross-sectional shapes, the connecting blocks and positioning posts are diagonally arranged on the skeleton, the connecting blocks and positioning posts are adjacent to the pins and extend through the cover to the outside of the shell, and when fixed to the external PCB board, the connecting blocks and positioning posts pass through the PCB board and form anchor points on one side of the PCB board.

[0006] Compared to existing technologies, this design integrates a connecting block and positioning posts with different cross-sectional shapes, ensuring consistent installation orientation of the audio transformer during assembly with the PCB. Furthermore, anchor points are formed by hot-melt at the ends of the connecting block and positioning posts, increasing the number of fixing points between the audio transformer and the PCB. This prevents loosening between the pins and the PCB when the audio transformer is subjected to external forces.

[0007] The utility model is an improvement on the stable audio transformer. The cross-section of the connecting block is polygonal, and the cross-section of the positioning column is circular.

[0008] The utility model is an improvement on the stable audio transformer. The skeleton includes a winding column for winding the coil. The two ends of the winding column are respectively integrally formed with a first baffle and a second baffle. A winding groove for fixing the coil is provided between the first baffle and the second baffle. The pins are inserted on the first baffle. The connecting block and the positioning column are integrally formed with the first baffle.

[0009] The utility model is an improvement on the stable audio transformer. The first baffle is composed of two pin seats with the same structure, and a gap is provided between the two pin seats. An insertion hole for inserting the iron core is provided along the axial direction of the winding column, and the insertion hole is connected with the gap.

[0010] The utility model is an improvement on the stable audio transformer. A plurality of steps are arranged on the side of the pin seat. The steps are recessed into the pin seat or extend outward from the pin seat. Penetrating insertion holes are provided on the steps, and pins are inserted into the insertion holes.

[0011] The utility model is an improvement on the stable audio transformer. The pins include a limiting rod and a connecting rod integrally formed in an L shape. The connecting rod is inserted into the insertion hole and passes through the cover body to be connected to the PCB board, while the limiting rod abuts against the surface of the step and is fixedly connected to the coil on the winding column by welding.

[0012] The utility model is an improvement on the stable audio transformer. The cover body is provided with a plurality of mounting holes for pins to pass through and transition holes respectively adapted to the connecting block and the positioning column. A glue injection hole is also provided on one side of the mounting hole.

[0013] The utility model is an improvement of the stable audio transformer. The installation chamber is filled with epoxy resin, and the epoxy resin is filled in the gap between the skeleton and the installation chamber and the gap between the pins and the interlaced holes on the step.

[0014] In addition to the technical problems solved by the present invention, the technical features that constitute the technical solutions, and the advantages brought about by the technical features of these technical solutions described above, other technical problems that can be solved by the present invention, other technical features included in the technical solutions, and the advantages brought about by these technical features will be further described in detail in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a cross-sectional view of the present utility model.

[0016] Figure 2 It is an exploded stereoscopic schematic diagram of the utility model.

[0017] Figure 3 It is a bottom view of the skeleton of the present utility model.

[0018] Figure 4 It is a top view of the cover body of the present utility model.

[0019] Explanation of the accompanying figures: 01. Shell, 02. Cover, 03. Frame, 04. Pin, 05. Connecting block, 06. Positioning column, 07. Winding column, 08. Second baffle, 09. Winding groove, 10. Pin seat, 11. Notch, 12. Through hole, 13. Step, 14. Limit rod, 15. Connecting rod, 16. Mounting hole, 17. Transition hole, 18. Glue injection hole. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0021] like Figure 1-4 As shown, the present invention's stable audio transformer comprises a metal housing 01 and a cover 02 mounted on housing 01. Housing 01 includes a mounting chamber for mounting a frame 03, with cover 02 positioned at the opening of the chamber. Frame 03 is provided with pins 04, one end of which passes through cover 02 and is soldered to an external PCB, securing the audio transformer to the PCB. Frame 03 is integrally formed with connecting blocks 05 and positioning posts 06 of varying cross-sectional shapes. These blocks 05 and posts 06 are diagonally positioned on frame 03, adjacent to pins 04, and extend through cover 02 to the exterior of housing 01.

[0022] When the audio transformer is connected to the PCB, a through-hole is provided on the PCB that mates with a connecting block 05 and a positioning post 06. The cross-sectional shapes of the connecting block 05 and the positioning post 06 are different. For example, the cross-sectional shape of the connecting block 05 is a quadrilateral, triangle, or other polygon, while the cross-sectional shape of the positioning post 06 is circular. The coordination between the connecting block 05 and the positioning post 06 ensures that the audio transformer maintains a unique orientation when installed on the PCB. If the audio transformer's installation orientation changes, the audio transformer cannot be installed on the PCB, thus preventing the audio transformer from being installed in the wrong orientation during installation.

[0023] After connecting block 05 and positioning pin 06 are inserted into the through-holes on the PCB, the ends of connecting block 05 and positioning pin 06 are melted by heat to form anchor points. The anchor points and the audio transformer housing are located on either side of the PCB. This secures the audio transformer to the PCB. Pin 04 is then soldered to the PCB. The anchor points provide two fixed points between the audio transformer and the PCB. When the audio transformer is subjected to external forces, pin 04 may become loose from the PCB. Because connecting block 05 and positioning pin 06 are positioned diagonally, two diagonally arranged anchor points are formed.

[0024] If the connecting block 05 and the positioning post 06 are set on the same side of the skeleton 03, or only the connecting block 05 or the positioning post 06 is set on the skeleton 03, when the connecting block 05 and the positioning post 06 are both inserted into the through holes on the PCB, and the ends of the connecting block 05 and the positioning post 06 are melted by hot melting to form anchor points, a gap will appear between the audio transformer and the PCB board, and the gap is located on the opposite side of the connecting block 05 and the positioning post 06.

[0025] At least one connection block 05 is provided on the skeleton 03 . In the present invention, three connection blocks 05 are provided on the component. The three connection blocks 05 and a positioning column 06 are respectively provided on the four corners of the skeleton 03 .

[0026] like Figure 1-2 As shown, the skeleton 03 includes a winding column 07 for winding the coil, and the first baffle and the second baffle 08 are integrally formed at both ends of the winding column 07. A winding groove 09 for fixing the coil is provided between the first baffle and the second baffle 08. The pins 04 are inserted into the first baffle, and the connecting block 05 and the positioning column 06 are integrally formed with the first baffle.

[0027] The first baffle is composed of two pin seats 10 of the same structure, with a gap 11 provided between the two pin seats 10. A through hole 12 for inserting the iron core is provided along the axial direction of the winding column 07, and the through hole 12 is connected to the gap 11.

[0028] Several steps 13 are arranged on the side of the pin base 10. The steps 13 are recessed into the pin base 10 or extend outward from the pin base 10. A through hole 12 is provided on the step 13. The axis of the through hole 12 is parallel to the axis of the through hole 12. The cross-sectional shape of the through hole 12 is circular or polygonal. The cross-sectional shape of the through hole 12 is preferably polygonal, such as triangular or quadrilateral, and the axis of the through hole 12 is parallel to the axis of the through hole 12. An L-shaped pin 04 is inserted into the through hole 12.

[0029] Pin 04 includes a limiting rod 14 and a connecting rod 15 formed by bending. The cross-sectional shape of the connecting rod 15 is the same as the cross-sectional shape of the insertion hole 12. The cross-sectional shapes of the insertion hole 12 and the connecting rod 15 are both polygonal designs to prevent pin 04 from rotating in the insertion hole 12. The connecting rod 15 is inserted into the insertion hole 12 and passes through the mounting hole 16 of the cover body 02 to connect with the external electronic components, while the limiting rod 14 abuts the surface of the step 13 and is fixedly connected to the coil on the winding column 07 by welding. Pin 04 is designed to be L-shaped. When a pulling force is applied to the connecting rod 15, the limiting rod 14 abuts the surface of the step 13. This prevents pin 04 from falling off the pin holder 10. The stability between pin 04 and the pin holder 10 is guaranteed.

[0030] like Figure 4 As shown, the cover body 02 is provided with a plurality of mounting holes 16 for the pins 04 to pass through and transition holes 17 respectively adapted to the connecting block 05 and the positioning column 06 , and a glue injection hole 18 is also provided on one side of the mounting hole 16 .

[0031] During assembly, the coil is first wound around the winding post 07. Pins 04 are then inserted into the various steps 13 as needed. The coil and pins 04 are securely connected by welding. This completes the fabrication of the skeleton 03. The skeleton 03 is then placed in the mounting chamber within the housing 01, and the cover is pressed into the housing 01. Pins 04 on the pin holder 10 are extended outside the housing 01 through the mounting holes 16 on the cover 02, facilitating connection between the pins 04 and external electronic components. Finally, epoxy resin is injected into the mounting chamber through the injection holes 18, filling the gaps between the skeleton 03 and the mounting chamber, as well as between the pins 04 and the insertion holes 12 on the steps 13. This enhances the overall mechanical strength of the audio transformer and increases its durability. The epoxy resin seals the internal components of the transformer, preventing the ingress of dust and moisture, thereby increasing the transformer's service life. Furthermore, epoxy resin filling the mounting chamber reduces noise in the transformer.

[0032] If the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), such directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0033] The above embodiments are merely descriptions of preferred embodiments of the present invention and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary engineering technicians in this field should fall within the scope of protection determined by the claims of the present invention.

Claims

1. A stable audio transformer, comprising a housing and a cover mounted on the housing, wherein the housing is provided with an installation chamber for mounting a frame, the frame being fixedly mounted in the installation chamber, and pins being provided on the frame, one end of which passes through the cover and is fixedly connected to an external PCB; characterized in that: The skeleton is integrally formed with connecting blocks and positioning posts with different cross-sectional shapes. The connecting blocks and positioning posts are diagonally arranged on the skeleton. The connecting blocks and positioning posts are adjacent to the pins and extend through the cover body to the outside of the shell. When fixed to the external PCB board, the connecting blocks and positioning posts pass through the PCB board and form an anchor point on one side of the PCB board.

2. The robust audio transformer according to claim 1, wherein: The cross-sectional shape of the connecting block is polygonal; the cross-sectional shape of the positioning column is circular.

3. The robust audio transformer according to claim 1, wherein: The skeleton includes a winding column for winding the coil, and a first baffle and a second baffle are integrally formed at both ends of the winding column. A winding groove for fixing the coil is provided between the first baffle and the second baffle, and the pins are inserted into the first baffle. The connecting block and the positioning column are integrally formed with the first baffle.

4. The robust audio transformer according to claim 3, wherein: The first baffle is composed of two pin seats with the same structure, and a gap is set between the two pin seats; an insertion hole for inserting the iron core is set along the axial direction of the winding column, and the insertion hole is connected with the gap.

5. The robust audio transformer according to claim 4, wherein: A plurality of steps are arranged on the side of the pin seat, and the steps are recessed into the pin seat or extended outward from the pin seat; through-holes are provided on the steps, and the pins are inserted into the through-holes.

6. The stable audio transformer according to claim 5, wherein: The pin includes an L-shaped integrally formed limit rod and a connecting rod. The connecting rod is inserted into the insertion hole and passes through the cover body to be connected to the PCB board, while the limit rod abuts against the surface of the step and is fixedly connected to the coil on the winding column by welding.

7. The robust audio transformer according to claim 6, wherein: The cover body is provided with a plurality of mounting holes for pins to pass through and transition holes adapted to the connecting block and the positioning column respectively. A glue injection hole is also provided on one side of the mounting hole.

8. The robust audio transformer according to claim 7, wherein: The installation chamber is filled with epoxy resin, and the epoxy resin is filled in the gap between the frame and the installation chamber and the gap between the pins and the through holes on the step.

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