Double-framework audio transformer

Abstract

The utility model relates to a double-framework audio transformer which is provided with two frameworks which are identical in structure and are arranged side by side, and two framework supports are connected through an iron core. Wherein a primary coil is arranged in one framework, and a secondary coil is arranged in the other framework; multiple layers of fixing belts are wound on the outer surfaces of the two frameworks, fixing plates used for fixing and separating wires of the primary coil and the secondary coil are fixedly installed in the fixing belts, and the wires of the primary coil and the secondary coil penetrate through the fixing plates and extend out of the frameworks; due to the arrangement of the two frameworks, the primary coil and the secondary coil are separated, and therefore the insulation performance of the transformer is improved. A fixing plate is arranged. And the fixing plate is used for respectively fixing and spacing the wires. Therefore, the phenomenon that two adjacent wires are in contact in the fixing belt is avoided, and meanwhile, the fixing plate is made of an insulating material, so that the insulativity between the wires and the coil is further enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of low-frequency transformers, and particularly to a double-frame audio transformer. Background Art

[0002] An audio transformer is a transformer operating in the audio frequency range, also known as a low-frequency transformer. The operating frequency range is generally from 10 to 20,000 Hz. It is commonly used to transform voltage or transform the impedance of a load. It is used as a component in circuits such as voltage amplification and power output in radio communication, radio and television, and automatic control. The audio transformer has a uniform frequency response within the working frequency band. Its iron core is stacked by high-permeability materials, and the primary and secondary windings are closely coupled. Thus, almost all the magnetic flux passing through the primary winding is connected to the secondary winding, and the coupling coefficient is close to 1. The lowest frequency of the passband is determined by the inductance of the primary winding, and the highest frequency is determined by the leakage inductance of the transformer. To ensure that the transformer has a sufficient passband, the inductance of the primary winding should be large and the leakage inductance should be small. The magnetic induction intensity of the iron core directly causes signal distortion.

[0003] Therefore, a pin-type double-frame transformer disclosed in Chinese Patent No. CN204966251U, which relates to the technical field of transformers, includes a frame, silicon steel sheets, and pins. The frame includes two side plates and an intermediate plate located between the two side plates. The two side plates and the intermediate plate form two space slots. The primary winding and the secondary winding are respectively located in the two space slots. Brackets are provided at the bottoms of the two side plates. Two frames with the primary winding and the secondary winding built in are placed side by side, and an isolation gap is left between the two frames. Multiple silicon steel sheets are stacked and inserted through the two frames. The brackets at the bottom of the side plates of the frame are connected to the pins, and the pins used are straight plug-type pins. The two frames and the brackets at the bottom of the side plates of the frame increase the balance and stability when the transformer is placed; different-position connection holes are provided on the brackets and the straight plug-type pins are connected through the connection holes, making the installation and connection of the transformer more flexible and increasing convenience. As can be seen from the above solution, the primary winding and the secondary winding are placed side by side in the two space slots. The primary winding and the secondary winding are separated by the intermediate plate. Multiple silicon steel sheets are stacked and combined to form an iron core. This setting is equivalent to two windings sharing the same iron core. This connection method where two windings share one iron core is called parallel connection. The inductance of two windings sharing one iron core is small, the magnetic flux is greatly interfered, and thus the electromagnetic induction intensity is low. Since the electromagnetic induction intensity is proportional to the inductance, when the inductance is small, there will be a problem of decreased high-frequency response, the sound is too warm and soft, and the sound quality lacks vitality, thus making the distortion phenomenon more obvious.

[0004] Meanwhile, in an existing transformer, multiple layers of insulating tapes are wound around the outer circumference of the transformer, and the wires of the primary coil and the secondary coil extend outward through the insulating tapes of adjacent two layers. Since the wires are located between the insulating tapes of adjacent two layers, when a pulling force is applied to one of the wires and the direction of the pulling force is consistent with the direction of the gap between the insulating tapes of adjacent two layers, the wire will move between the insulating tapes of adjacent two layers, thereby resulting in the risk of the wire coming into contact with the adjacent wires within the insulating tape. Summary of the Invention

[0005] The purpose of the present invention is to provide a double-frame audio transformer to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above purpose, the technical solution adopted by the present invention is: a double-frame audio transformer, which has two frames with the same structure and arranged side by side, and the two frame brackets are connected by an iron core; a primary coil is arranged in one of the frames, and a secondary coil is arranged in the other frame; multiple layers of fixing tapes are wound on the outer surfaces of the two frames, and fixing plates for fixing and separating the wires of the primary coil and the secondary coil are fixedly installed within the fixing tapes, and the wires of the primary coil and the secondary coil extend to the outside of the frames through the fixing plates.

[0007] Compared with the prior art, due to the arrangement of the two frames, the primary coil and the secondary coil are separated, thereby improving the insulation performance of the transformer. Due to the arrangement of the fixing plates, each wire is fixed and spaced separately by the fixing plates, thereby avoiding the phenomenon that adjacent two wires come into contact within the fixing tapes. At the same time, the fixing plates are made of insulating materials, which further enhances the insulation between the wires and the coils.

[0008] Regarding the improvement of the double-frame audio transformer of the present invention, the frame includes a connecting column for winding the coil, and baffles are integrally formed at both ends of the connecting column, and a winding groove is formed between the two baffles, and the secondary coil or the primary coil is fixed within the winding groove.

[0009] Regarding the improvement of the double-frame audio transformer of the present invention, a through mounting hole is provided on the connecting column, and the iron core is inserted into the mounting hole.

[0010] Regarding the improvement of the double-frame audio transformer of the present invention, the iron core is stacked by a plurality of "U"-shaped steel sheets.

[0011] Regarding the improvement of the double-frame audio transformer of the present invention, through holes adapted to the wires are provided on the fixing plates, and both sides of the fixing plates are adhesively fixed to the fixing tapes of adjacent two layers.

[0012] Improvement of the double-frame audio transformer of the present utility model. A pin is fixedly installed in the through hole of the fixing plate. The pin is fixedly installed in the through hole, and one end of the pin is fixedly connected to a wire; the other end of the pin passes through the fixing band and extends outside the frame.

[0013] Improvement of the double-frame audio transformer of the present utility model. A plurality of card slots adapted to the pins are provided on the baffle; the pins are fixedly clamped in the card slots.

[0014] In addition to the technical problems solved by the present invention, the technical features constituting the technical solution, and the advantages brought by these technical features of the technical solution described above, other technical problems that the present utility model can solve, other technical features included in the technical solution, and the advantages brought by these technical features will be further described in detail in conjunction with the accompanying drawings. Description of the Drawings

[0015] Figure 1 is a three-dimensional schematic diagram of the present utility model.

[0016] Figure 2 is a sectional view taken along line A-A of the present utility model.

[0017] Figure 3 is a three-dimensional schematic diagram of the frame of the present utility model.

[0018] Figure 4 is a three-dimensional schematic diagram of the fixing plate of the present utility model.

[0019] Explanation of the reference numerals in the drawings: 01. Frame, 02. Iron core, 03. Connecting column, 04. Baffle, 05. Winding groove, 06. Mounting hole, 07. Steel sheet, 08. Fixing band, 09. Primary coil, 10. Secondary coil, 11. Fixing plate, 12. Through hole, 13. Pin, 14. Card slot. Detailed Embodiment

[0020] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model.

[0021] Such as Figures 1-4As shown in the figure, the double-frame audio transformer of the present utility model has two frames 01 with the same structure and arranged side by side. The frames 01 are made of nylon material. The two frames 01 are connected by an iron core 02. The frame 01 includes a connecting column 03 for winding coils. At both ends of the connecting column 03, baffles 04 are integrally formed. A winding groove 05 is formed between the two baffles 04. The primary coil 09 is wound in the winding groove 05 of one of the frames 01, and the secondary coil 10 is wound in the winding groove 05 of the other frame 01. It is equivalent to the primary coil 09 and the secondary coil 10 being wound on two iron cores 02 respectively. The circuit connection mode of the two windings and the two iron cores 02 is in series. The two windings are independent of each other, each having a separate magnetic flux, and they do not affect each other. The two windings are independent of each other, each having a separate magnetic flux, and they do not affect each other. The magnetic flux is less interfered, so the electromagnetic induction intensity is higher. And the magnetic induction intensity is proportional to the inductance. In the audio field, the size of the inductance affects the frequency response and distortion degree of the sound. Generally speaking, the larger the inductance, the flatter the frequency response and the smaller the distortion. Therefore, by winding the primary coil 09 and the secondary coil 10 on the two frames 01 respectively, when the audio transformer of the present application is applied to other audio fields such as recording studios and audio power amplifiers, it can ensure that the sound will not be distorted.

[0022] As Figure 3 shown, a through mounting hole 06 is provided on the connecting column 03, and the iron core 02 is inserted into the mounting hole 06. The iron core 02 is stacked by a plurality of "U"-shaped steel sheets 07. The above-mentioned steel sheets 07 are preferably silicon steel sheets 07 or silicon steel sheets 07. During the assembly process, first wind the primary coil 09 on one of the frames 01, wind the secondary coil 10 on the other frame 01, and wind insulating tapes on the outer surfaces of the primary coil 09 and the secondary coil 10 respectively. Then place the two frames 01 side by side. Insert the two ends of the steel sheet 07 into the mounting holes 06 of the two frames 01 respectively. While fixing the two frames 01, it also functions as the iron core 02. The setting of the two frames 01 separates the primary coil 09 and the secondary coil 10, thereby improving the insulation performance of the transformer.

[0023] To further improve the stability between the two frames 01, a plurality of fixing tapes 08 are wound on the outer surfaces of the two frames 01. The wires of the primary coil 09 and the secondary coil 10 pass through adjacent layers of the fixing tapes 08 and extend outside the frames 01. The fixing tapes 08 are preferably insulating tapes. By fixing the two frames 01 with both the steel sheet 07 and the fixing tapes 08, the stability is improved.

[0024] As Figure 4As shown, since the wire is located between the fixing belts 08 of adjacent layers. When a tensile force is applied to one of the wires and the direction of the tensile force is consistent with the direction of the gap between the fixing belts 08 of adjacent layers, the wire will move between the fixing belts 08 of adjacent layers. This will lead to the risk of the wire coming into contact with the adjacent wire within the fixing belt 08. To compensate for this risk, a fixing plate 11 is provided between the fixing belts 08 of adjacent layers. Through holes 12 adapted to the wires are provided on the fixing plate 11. Both sides of the fixing plate 11 are adhered to the fixing belts 08 of adjacent layers using epoxy resin. The fixing plate 11 is preferably made of other insulating materials such as red steel paper or plastic. By providing the fixing plate 11 within the fixing belt 08, the wires of the primary coil and the secondary coil 10 pass through the through holes 12 on the fixing plate 11 and extend outside the skeleton 01. The wires and the through holes 12 are fixed using epoxy resin. When a tensile force is applied to one of them, due to the provision of the fixing plate 11, the wires located on the fixing plate 11 will also move together with the fixing plate 11. This avoids the phenomenon of adjacent two wires coming into contact within the fixing belt 08. At the same time, the fixing plate 11 is made of insulating material, which further enhances the insulation between the wires and the coil.

[0025] To improve production efficiency and facilitate the connection between the transformer and the outside. A pin 13 is fixedly installed in the through hole 12 of the fixing plate 11. The pin 13 and the through hole 12 can be fixedly installed by using epoxy resin or interference fit. One end of the pin 13 is fixedly connected to the wire by welding. The other end of the pin 13 passes through the fixing belt 08 and extends outside the skeleton 01. During the production process, first, the fixing plate 11 and the pin 13 are fixedly connected. Then, the wire and the pin 13 are fixedly connected by welding. This is more efficient than the method of passing the wire through the through hole. At the same time, the design of the pin 13 facilitates the welding connection with external devices.

[0026] To facilitate the fixation of the pin 13. A number of card slots 14 adapted to the pin 13 are provided on the baffle 04. When installing the fixing plate 11, the pin 13 is fixedly clamped in the card slot 14, further improving the stability of the fixing plate 11 within the fixing belt 08.

[0027] If there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present utility model, then the directional indications are only used to explain the relative positional relationship and movement conditions between components in a certain specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0028] The above embodiments are only descriptions of the preferred embodiments of the present utility model, and do not limit the scope of the present utility model. Without departing from the design spirit of the present utility model, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present utility model shall fall within the protection scope determined by the claims of the present utility model.

Claims

1. A double-frame audio transformer, characterized in that: It comprises two skeletons with the same structure and arranged side by side, and the two skeleton brackets are connected by an iron core; a primary coil is arranged in one of the skeletons, and a secondary coil is arranged in the other skeleton; multiple layers of fixing belts are wrapped around the outer surfaces of the two skeletons, and fixing plates for fixing and separating the wires of the primary coil and the secondary coil are fixedly installed in the fixing belts, and the wires of the primary coil and the secondary coil extend outside the skeleton through the fixing plates.

2. The double-frame audio transformer according to claim 1, characterized in that: The skeleton comprises a connecting column for winding the coil, baffles are integrally formed at both ends of the connecting column, a winding groove is formed between the two baffles, and the secondary coil or the primary coil is fixed in the winding groove.

3. The double-frame audio transformer according to claim 2, characterized in that: The connecting column is provided with a through mounting hole, and the iron core is inserted into the mounting hole.

4. The double-frame audio transformer according to claim 3, characterized in that: The iron core is made of several U-shaped steel sheets stacked together.

5. The double-frame audio transformer according to claim 1, characterized in that: The fixing plate is provided with through holes adapted to the wires, and two sides of the fixing plate are respectively adhered and fixed to the fixing belts of two adjacent layers.

6. The double-frame audio transformer according to claim 5, characterized in that: A pin is fixedly installed in the through hole of the fixing plate, and one end of the pin is fixedly connected with the wire; and the other end of the pin passes through the fixing belt and extends outside the frame.

7. The double-frame audio transformer according to claim 6, characterized in that: The baffle is provided with a plurality of slots adapted to the plug pins; the plug pins are fixedly plugged into the slots.

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