Transformer frame and production method thereof and transformer

Abstract

The present invention discloses a transformer skeleton, a production method thereof and a transformer, wherein the transformer comprises a coil and a transformer skeleton, wherein the coil is wrapped around the transformer skeleton, wherein the transformer skeleton comprises a first pin assembly, a second pin assembly and a winding assembly, wherein the first pin assembly and the second pin assembly are connected via a connector, wherein the winding assembly is injection molded on the first pin assembly and the second pin assembly, wherein the connector is at least partially exposed outside the winding assembly. The connector connects the first pin assembly and the second pin assembly into one body, so that they can be positioned relative to each other during injection molding, thereby making the injection molding more stable. After the winding assembly is injection molded, the exposed connector is removed. This can avoid the problem that the U-shaped PIN pin cannot be positioned inside the plastic winding assembly during injection molding, and is easily tilted or shifted by injection pressure during the molding process, resulting in poor pressure resistance of the product.

Description

Technical Field

[0001] The invention relates to the field of transformer production, and in particular to a transformer frame and a production method thereof, and a transformer. Background Art

[0002] The transformer skeleton, also known as the transformer wire frame, is collectively referred to as Bobbin in English. It is a component of the main structure of the transformer. Transformers are widely used in today's society, and the corresponding main body is also indispensable, so the skeleton plays an irreplaceable role. The transformer is a device that uses the principle of electromagnetic induction to change the AC voltage. The main components are the primary coil, the secondary coil and the iron core (magnetic core). The coil has two or more windings, of which the winding connected to the power supply is called the primary coil, and the remaining windings are called secondary coils. It can transform AC voltage, current and impedance. The simplest iron core transformer consists of an iron core made of soft magnetic material and two coils with different numbers of turns on the iron core.

[0003] During the injection molding of the winding assembly inside the existing transformer, the pin assemblies at the left and right ends are separated (such as Figure 1 As shown in the figure, during injection molding, the PIN needle cannot be positioned inside the plastic winding component, and is easily tilted or shifted by the injection pressure during the molding process, resulting in poor pressure resistance of the product (such as Figure 2 as shown).

[0004] In view of this, the inventor conducted in-depth research on the above-mentioned defects in the prior art, and thus came up with this case. Summary of the invention

[0005] The main purpose of the present invention is to provide a transformer skeleton and a production method thereof and a transformer, so as to solve the problem that the PIN pins of the winding components of the existing transformer skeleton cannot be positioned during injection molding, thereby improving the yield rate of the product.

[0006] In order to achieve the above object, the solution of the present invention is:

[0007] A transformer skeleton comprises a first pin assembly, a second pin assembly and a winding assembly, wherein the first pin assembly and the second pin assembly are connected via a connector, the winding assembly is injection molded on the first pin assembly and the second pin assembly, and the connector is at least partially exposed outside the winding assembly.

[0008] Furthermore, the connecting member is a connecting rod, and two ends of the connecting member are fixedly connected to the first pin assembly and the second pin assembly respectively.

[0009] Furthermore, the connector, the first pin assembly and the second pin assembly are integrally connected.

[0010] Further, the first pin assembly includes a first pin terminal and a first PIN pin, the second pin assembly includes a second pin terminal and a second PIN pin, the winding assembly is injection molded on the first PIN pin and the second PIN pin, the first pin terminal is fixedly connected to one end of the first PIN pin exposed from the winding assembly, and the second pin terminal is fixedly connected to one end of the second PIN pin exposed from the winding assembly.

[0011] Furthermore, the first pin terminal and the second pin terminal are provided with fixing holes.

[0012] Furthermore, the fixing holes are respectively arranged at middle positions inside the first pin terminal and the second pin terminal.

[0013] Furthermore, two ends of the connecting member are fixedly connected to the first PIN pin terminal and the second pin pin terminal respectively.

[0014] Furthermore, the first PIN pin is U-shaped.

[0015] Furthermore, the first pin assembly, the second pin assembly and the connector are all made of conductive metal materials.

[0016] A method for producing a transformer skeleton, comprising the following steps:

[0017] ① preparing a pin assembly, wherein the pin assembly comprises a first pin assembly, a second pin assembly and a connector, wherein the first pin assembly and the second pin assembly are connected via the connector;

[0018] ② Injection molding the winding assembly, the winding assembly is injection molded on the first pin assembly and the second pin assembly by an injection molding machine, and the connecting member is at least partially exposed outside the winding assembly;

[0019] ③ Cut off the connector exposed outside the winding assembly, and disconnect the first pin assembly and the second pin assembly through the connector.

[0020] A transformer comprises a coil and a transformer frame, wherein the coil is wound on the transformer frame, and the transformer frame comprises a first pin assembly, a second pin assembly and a winding assembly, wherein the first pin assembly and the second pin assembly are connected via a connector, the winding assembly is injection molded on the first pin assembly and the second pin assembly, and the connector is at least partially exposed outside the winding assembly.

[0021] After adopting the above structure, the transformer skeleton and its production method and transformer of the present invention have at least the following beneficial effects:

[0022] 1. The connector connects the first pin assembly and the second pin assembly into one body, so that they can be positioned relative to each other during injection molding, making the injection molding more stable. After the winding assembly is injection molded, the exposed connector is removed to disconnect the first pin assembly and the second pin assembly through the connector.

[0023] 2. The structure of the present invention is scientific and reasonable, and it is safe and convenient to use. A U-shaped PIN needle is arranged on a side of the first pin terminal close to the second pin terminal, the U-shaped PIN needle is fixedly connected to the first pin terminal, and a connecting rod is arranged on one end of the U-shaped PIN needle close to the second pin terminal, one end of the connecting rod is fixedly connected to the U-shaped PIN needle, and the end of the connecting rod away from the U-shaped PIN needle is fixedly connected to the second pin terminal, so that during injection molding, the first pin terminal and the second pin terminal on both sides are integrated, so that there are supports on both sides during the molding process, which can avoid the problem that the U-shaped PIN needle cannot be positioned inside the plastic winding component during injection molding, and is easily tilted or shifted due to injection pressure during the molding process, resulting in poor pressure resistance of the product.

[0024] Third, by opening fixing holes at the middle positions inside the first pin terminal and the second pin terminal, the first pin terminal and the second pin terminal can be fixed before injection molding, making it more stable during injection molding. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the structure of the pin assembly before improvement of the present invention.

[0026] Figure 2 It is a schematic structural diagram of the improved front injection and rear winding assembly of the present invention after the internal pin assembly is displaced.

[0027] Figure 3 It is a schematic diagram of the overall structure of the present invention;

[0028] Figure 4 is a schematic structural diagram of the improved pin assembly of the present invention;

[0029] In the figure:

[0030] First PIN pin 1; first pin terminal 2; second pin terminal 3; fixing hole 4; connecting piece 5; winding assembly 6; second PIN pin 7. DETAILED DESCRIPTION

[0031] In order to further explain the technical solution of the present invention, the present invention is described in detail below through specific embodiments.

[0032] like Figure 3 to Figure 4As shown, it is a transformer skeleton involved in the present invention, including a first pin assembly, a second pin assembly and a winding assembly 6, the first pin assembly and the second pin assembly are connected by a connecting member 5, the winding assembly 6 is injection molded on the first pin assembly and the second pin assembly, and the connecting member 5 is at least partially exposed outside the winding assembly 6.

[0033] In this way, the present invention relates to a transformer frame and a transformer, wherein the connector 5 connects the first pin assembly and the second pin assembly into one body, so that they can be positioned relative to each other during injection molding, making the injection molding more stable. After the winding assembly 6 is injection molded, the exposed connector 5 is removed.

[0034] Preferably, the connector 5 is a connecting rod, and both ends of the connector 5 are fixedly connected to the first pin assembly and the second pin assembly, respectively. The connector 5 is a rod-shaped shape, which is easy to process, can improve production efficiency and reduce production costs.

[0035] Preferably, the connector 5, the first pin assembly and the second pin assembly are connected as one piece. In this way, the connector 5, the first pin assembly and the second pin assembly can be stamped and formed as one piece, which is convenient for batch production.

[0036] Further, the first pin assembly includes a first pin terminal 2 and a first PIN pin 1, the second pin assembly includes a second pin terminal 3 and a second PIN pin 7, the winding assembly 6 is injection molded on the first PIN pin 1 and the second PIN pin 7, the first pin terminal 2 is fixedly connected to the end of the first PIN pin 1 exposed from the winding assembly 6, and the second pin terminal 3 is fixedly connected to the end of the second PIN pin 7 exposed from the winding assembly 6. The first pin terminal 2 and the second pin terminal 3 can support and fix the first PIN pin 1 and the second PIN pin 7 when the winding assembly 6 is injection molded.

[0037] Preferably, the first PIN pin 1 is U-shaped. The two ends of the connector 5 are respectively fixedly connected to the first PIN pin 1 and the second pin terminal 3. Of course, the two ends of the connector 5 can also be fixedly connected to the first PIN pin 1 and the second PIN pin 7 (not shown in the figure).

[0038] The structure of the present invention is scientific and reasonable, and it is safe and convenient to use. A U-shaped PIN needle is arranged on the side of the first pin terminal 2 close to the second pin terminal 3, and the U-shaped PIN needle is fixedly connected to the first pin terminal 2. A connecting rod is arranged on the end of the U-shaped PIN needle close to the second pin terminal 3, and one end of the connecting rod is fixedly connected to the U-shaped PIN needle, and the end of the connecting rod away from the U-shaped PIN needle is fixedly connected to the second pin terminal 3, so that during injection molding, the first pin terminal 2 and the second pin terminal 3 on both sides are integrated, so that there are supports on both sides during the molding process, which can avoid the problem that the U-shaped PIN needle cannot be positioned inside the plastic winding assembly 6 during injection molding, and is easily tilted or shifted by the injection pressure during the molding process, resulting in poor pressure resistance of the product. Finally, after the terminals on the left and right sides are cut, the connecting rod 5 at one end of the U-shaped PIN needle is removed.

[0039] Furthermore, a fixing hole 4 is provided on the first pin terminal 2 and the second pin terminal 3. The first pin terminal 2 and the second pin terminal 3 can be better positioned and fixed through the fixing hole 4. Preferably, the fixing hole 4 is respectively arranged at the middle position inside the first pin terminal 2 and the second pin terminal 3. By providing the fixing hole 4 at the middle position inside the first pin terminal 2 and the second pin terminal 3, the first pin terminal 2 and the second pin terminal 3 can be fixed before injection molding, so that it is more stable during injection molding.

[0040] Preferably, the first pin assembly, the second pin assembly and the connector 5 are all made of conductive metal materials, so that the first pin terminal 2, the second pin terminal 3 and the connecting rod have strong hardness and sufficient supporting capacity. The conductive metal material improves the ability of the first pin assembly, the second pin assembly and the connector 5 to resist injection pressure impact during injection molding.

[0041] The present invention also provides a method for producing a transformer skeleton, comprising the following steps: ① preparing a pin assembly, the pin assembly comprising a first pin assembly, a second pin assembly and a connector 5, the first pin assembly and the second pin assembly being connected via the connector 5; the pin assembly can be integrally formed from a metal sheet by stamping. ② injection molding a winding assembly 6, injection molding the winding assembly 6 on the first pin assembly and the second pin assembly by an injection molding machine, the connector 5 at least partially exposed outside the winding assembly 6. ③ cutting off the connector 5 exposed outside the winding assembly 6, disconnecting the connection between the first pin assembly and the second pin assembly via the connector 5. In this way, the first pin assembly and the second pin assembly can be connected into one piece via the connector 5, so that they can be positioned relative to each other during injection molding, making the injection molding more stable.

[0042] The present invention also provides a transformer, including a coil and a transformer frame, wherein the coil is wrapped around the transformer frame, and the transformer frame includes a first pin assembly, a second pin assembly and a winding assembly 6, wherein the first pin assembly and the second pin assembly are connected via a connector 5, and the winding assembly 6 is injection molded on the first pin assembly and the second pin assembly, and the connector 5 is at least partially exposed outside the winding assembly 6.

[0043] The above embodiments and drawings do not limit the product form and style of the present invention. Any appropriate changes or modifications made by ordinary technicians in the relevant technical field should be deemed to be within the patent scope of the present invention.

Claims

1. A method for producing a transformer skeleton, characterized in that: The transformer skeleton comprises a first pin assembly, a second pin assembly and a winding assembly, wherein the first pin assembly and the second pin assembly are connected via a connector, the winding assembly is injection molded on the first pin assembly and the second pin assembly, and the connector is at least partially exposed outside the winding assembly; and further comprises the following steps: ① preparing a pin assembly, wherein the pin assembly comprises a first pin assembly, a second pin assembly and a connector, wherein the first pin assembly and the second pin assembly are connected via the connector; ② Injection molding the winding assembly, the winding assembly is injection molded on the first pin assembly and the second pin assembly by an injection molding machine, and the connecting member is at least partially exposed outside the winding assembly; ③ Cut off the connector exposed outside the winding assembly, and disconnect the first pin assembly and the second pin assembly through the connector.

2. The method for producing a transformer skeleton according to claim 1, characterized in that: The connecting member is a connecting rod, and both ends of the connecting member are fixedly connected to the first pin assembly and the second pin assembly respectively.

3. The method for producing a transformer skeleton according to claim 1, characterized in that: The connecting piece, the first pin assembly and the second pin assembly are integrally connected.

4. The method for producing a transformer skeleton according to claim 1, characterized in that: The first pin assembly includes a first pin terminal and a first PIN pin, the second pin assembly includes a second pin terminal and a second PIN pin, the winding assembly is injection molded on the first PIN pin and the second PIN pin, the first pin terminal is fixedly connected to one end of the first PIN pin exposed from the winding assembly, and the second pin terminal is fixedly connected to one end of the second PIN pin exposed from the winding assembly.

5. The method for producing a transformer skeleton according to claim 4, characterized in that: The first pin terminal and the second pin terminal are provided with fixing holes.

6. The method for producing a transformer skeleton according to claim 5, characterized in that: The fixing holes are respectively arranged at middle positions inside the first pin terminal and the second pin terminal.

7. The method for producing a transformer skeleton according to claim 4, characterized in that: The first PIN pin is U-shaped, and two ends of the connecting member are fixedly connected to the first PIN pin and the second pin terminal respectively.

8. The method for producing a transformer skeleton according to claim 1, characterized in that: The first pin assembly, the second pin assembly and the connecting piece are all made of conductive metal materials.

9. A transformer, comprising a coil and a transformer frame, wherein the coil is wound around the transformer frame, characterized in that: The transformer skeleton comprises a first pin assembly, a second pin assembly and a winding assembly, the first pin assembly and the second pin assembly are connected via a connector, the winding assembly is injection molded on the first pin assembly and the second pin assembly, and the connector is at least partially exposed outside the winding assembly; The first pin assembly includes a first pin terminal and a first PIN pin, the second pin assembly includes a second pin terminal and a second PIN pin, the winding assembly is injection molded on the first PIN pin and the second PIN pin, the first pin terminal is fixedly connected to an end of the first PIN pin exposed from the winding assembly, and the second pin terminal is fixedly connected to an end of the second PIN pin exposed from the winding assembly; The first PIN pin is U-shaped, and two ends of the connecting member are fixedly connected to the first PIN pin and the second pin terminal respectively.

10. A transformer skeleton, comprising a first pin assembly, a second pin assembly and a winding assembly, characterized in that: The first pin assembly and the second pin assembly are connected via a connector, the winding assembly is injection molded on the first pin assembly and the second pin assembly, and the connector is at least partially exposed outside the winding assembly; The connecting member, the first pin assembly and the second pin assembly are integrally connected; The first pin assembly includes a first pin terminal and a first PIN pin, the second pin assembly includes a second pin terminal and a second PIN pin, the winding assembly is injection molded on the first PIN pin and the second PIN pin, the first pin terminal is fixedly connected to an end of the first PIN pin exposed from the winding assembly, and the second pin terminal is fixedly connected to an end of the second PIN pin exposed from the winding assembly; The first PIN pin is U-shaped, and the two ends of the connecting member are fixedly connected to the first PIN pin and the second pin terminal respectively; The first pin assembly, the second pin assembly and the connecting piece are all made of conductive metal materials.

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