Power transformer with lead fixing structure

Abstract

The invention discloses a power transformer with a lead wire fixing structure, which comprises a frame body, a lead wire and an elastic piece, the elastic piece is provided with a limiting block, the frame body comprises a side wall I and a side wall II which are arranged back to back, the side wall I and the side wall II are respectively provided with at least two through grooves, and the through grooves in the side wall I and the through grooves in the side wall II are arranged in a one-to-one correspondence manner. The two opposite inner walls of the through groove are each provided with an insertion groove, each insertion groove comprises an insertion opening allowing the two opposite ends of the elastic piece to be inserted into the corresponding insertion groove, and the groove wall of each insertion groove is provided with a limiting groove allowing the corresponding limiting block to be embedded and fixed. The situation that the transformer is not matched with other existing components is avoided, and the lead fixing effect is guaranteed while the size of the transformer is not greatly increased. The packaging device is easy to operate, and the packaging efficiency is improved. And the transformer can generate heat in the actual use process, the through grooves can increase the surface area of the frame body, and a certain heat dissipation effect is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of transformers, and in particular relates to a power transformer with a lead fixing structure. Background Art

[0002] A transformer is a device that uses the principle of electromagnetic induction to change AC voltage. Its main components are the primary coil, the secondary coil, and the iron core (magnetic core). The function of the iron core is to strengthen the magnetic coupling between the two coils. In electrical equipment and wireless circuits, it is often used to increase or decrease voltage, match impedance, and provide safety isolation. Depending on the usage scenario, the type of transformer used is also different. Power transformers are used in most household appliances, and lead-type power transformers are a common type of power transformer.

[0003] Lead-type power transformers usually include a frame and leads. When the transformer leaves the factory, the leads are either directly exposed outside the frame or wrapped around the frame. This causes the leads to bend due to extrusion, rub against other objects, and other problems that affect the normal use of the leads during the journey from leaving the factory to being installed. In order to prevent the above problems from occurring, fixed structures that can fix the leads have appeared on the market, but the existing fixed structures are either additionally mounted outside the frame, which greatly increases the overall volume of the transformer, cannot meet the demand for miniaturization of the transformer, and also weakens the heat dissipation effect of the transformer; or they are directly fixed on the frame, but the fixed structure set on the frame is complex and needs to be fixed to the frame by welding or welding, which is costly and requires operators to thread the leads one by one on the fixed structure, which is cumbersome to operate and reduces the packaging efficiency. Summary of the invention

[0004] In order to overcome the deficiencies of the prior art, the present invention provides a power transformer with a lead fixing structure. Compared with the prior art, the lead fixing structure has a simple structure and a good fixing effect.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a power transformer with a lead fixing structure, comprising a frame and a lead, and also comprising an elastic member, the elastic member is provided with a limit block, the frame comprises a side wall one and a side wall two arranged back to back, the side wall one and the side wall two are each provided with at least two through grooves, the through groove of the side wall one and the through groove on the side wall two are arranged one-to-one, the two opposite inner walls of the through groove are each provided with an insertion groove, the insertion groove comprises an insertion opening for the opposite two ends of the elastic member to be inserted into the insertion groove, and the groove wall of the insertion groove is provided with a limit groove for the limit block to be embedded and fixed; when the limit block forms a limit with the limit groove, the elastic member is squeezed by the insertion groove to produce deformation, and there is a gap between the elastic member and the groove bottom of the through groove.

[0006] By adopting the above scheme, when it is necessary to pack, the lead wire is firstly wound on the frame, and the lead wire is located in the through groove of the side wall one and the side wall two. After winding, the elastic member is inserted into the insertion groove through the insertion port. Under the action of its own elastic force, the elastic member forms a limit between the limit block and the limit groove, which can prevent the elastic member from slipping out of the insertion groove when there is no force applied by the operator. The elastic member located in the insertion groove can apply force to the part of the lead wire located in the through groove, play a role in fixing the lead wire, and prevent the lead wire from automatically unwinding during the movement of the present invention. The through groove can reduce the situation where the lead wire is squeezed and bent, and can reduce the contact and friction between the lead wire and external objects during the movement of the present invention, thereby ensuring the normal use of the lead wire. When installation is required, the operator applies force to the elastic member to disengage the limit block from the limit groove, and then the elastic member can be taken out from the insertion groove. After taking it out, the winding of the lead wire can be unwound, and the lead wire can be normally connected to the external component.

[0007] In actual use, according to the length of the lead and the position of the end, the elastic member can be arranged only in part of the through groove, so as to facilitate the subsequent removal of the elastic member and improve the removal efficiency.

[0008] Compared with the existing lead fixing structure, the present invention has a simple structure, is easy to produce, does not appear incompatible with other existing components, and ensures the effect of fixing the lead without greatly increasing the volume of the transformer. The present invention is easy to operate and improves the packaging efficiency. In addition, the transformer will generate heat during actual use, and the through groove can increase the surface area of ​​the frame, thereby improving a certain heat dissipation effect.

[0009] As a further configuration of the present invention, the through groove includes a positive groove bottom, a positive groove opening opposite to the positive groove bottom, and two side groove openings arranged oppositely, the side groove openings are connected to the positive groove opening, the positive groove bottom includes a flat section and an inclined section, the inclined section has two sections and is respectively arranged on both sides of the flat section, the inclined section is arranged between the side groove opening and the flat section, the side of the inclined section close to the side groove opening is inclined toward the direction away from the positive groove, and the insertion port is arranged on one of the side groove openings.

[0010] With the above solution, the lead wire may have a certain relative displacement with the frame during the movement of the present invention. The existence of the inclined section makes the edge of the positive groove bottom smoother, which can prevent the outer skin of the lead wire located at the edge of the positive groove bottom from being damaged or bent due to relative displacement during the movement of the present invention.

[0011] As a further configuration of the present invention, the elastic member includes sheet body one, sheet body two and a connecting portion, sheet body one and sheet body two are connected by the connecting portion, the limit block is arranged on the surface of sheet body one facing away from sheet body two, and the distance between sheet body one and sheet body two becomes smaller as it is closer to the connecting portion; when the limit block forms a limit with the limit groove, the opposite surfaces of sheet body one and sheet body two respectively abut against the two groove walls opposite to the insertion groove.

[0012] By adopting the above solution, the elastic member has a simple structure and is convenient to produce and process. In order to reduce the overall weight of the present invention, the elastic member can be made of plastic.

[0013] As a further configuration of the present invention, the inclined section is an arc-shaped surface convex toward a direction approaching the positive notch.

[0014] By adopting the above solution, the edge of the positive groove bottom is made smooth, ensuring that there is no sharp part at the positive groove bottom.

[0015] As a further configuration of the present invention, the insertion groove includes groove wall one and groove wall two respectively located on both sides of the insertion port, the groove wall one is located on the side of the groove wall two away from the bottom of the groove, the distance between the groove wall one and the groove wall two increases as it is closer to the insertion port, and the limit groove is located on the side of the groove wall one close to the insertion port; when the limit block forms a limit with the limit groove, the connecting portion is located on the side of the sheet body one away from the insertion port.

[0016] With the above solution, after the limiting block and the limiting groove are limited, the surface of the first sheet facing away from the second sheet contacts one surface of the groove wall, and the surface of the second sheet facing away from the first sheet contacts two surfaces of the groove wall, thereby improving the stability of the elastic member and enabling the second sheet to stably press the portion of the lead wire located in the through groove.

[0017] As a further configuration of the present invention, when the limit block and the limit groove form a limit, the projection of the second sheet on the bottom of the positive groove spans the flat section and the inclined section, and the projection of the second sheet on the flat section is greater than or equal to the projection of the second sheet on the inclined section.

[0018] By adopting the above scheme, during the process of inserting the elastic member into the insertion slot, the distance from the second sheet to the bottom of the positive slot gradually decreases, making it convenient for the elastic member to gradually fix the part of the lead wire in the through slot with the through slot, thereby preventing the lead wire from being displaced significantly as the elastic member is inserted into or leaves the insertion slot.

[0019] As a further configuration of the present invention, the cross section of the flat section along a direction parallel to the side notch is an arc with a middle portion concave in a direction away from the notch.

[0020] By adopting the above solution, when the number of lead wire turns is greater than one turn, it is convenient for the lead wire to be concentrated in the middle of the through slot, and it is convenient for the elastic member to press the lead wire.

[0021] As a further configuration of the present invention, when the limiting block and the limiting groove form a limit, the angle between the sheet body 1 and the sheet body 2 is 10° to 25°.

[0022] The above solution makes it convenient for operators to apply force to the elastic member, so that the limit block can be separated from the limit groove.

[0023] As a further configuration of the present invention, a rubber layer is provided on the surface of the second sheet body facing away from the first sheet body, and the surface of the rubber layer facing away from the second sheet body is an arc-shaped surface.

[0024] By adopting the above solution, when the elastic member presses the lead wire, the rubber layer can produce a certain deformation to prevent the elastic member from pressing too hard.

[0025] As a further configuration of the present invention, the cross-section of the limit block is semi-elliptical or semi-circular.

[0026] The above solution makes it easy for the limit block to be embedded in or out of the limit groove.

[0027] The present invention will be further described below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Attached Figure 1 This is a schematic diagram of a lead wire in an unfixed state according to a specific embodiment of the present invention;

[0029] Attached Figure 2 For attachment Figure 1 A magnified view of part A;

[0030] Attached Figure 3 A schematic diagram of an insertion slot according to a specific embodiment of the present invention;

[0031] Attached Figure 4 It is a schematic diagram of an elastic member according to a specific embodiment of the present invention;

[0032] Attached Figure 5 This is a schematic diagram of the lead fixing state of a specific embodiment of the present invention;

[0033] Attached Figure 6 For attachment Figure 5 Enlarged view of part B.

[0034] Frame 1, side wall 11, side wall 2 12, through slot 13, insertion slot 131, limiting slot 1311, insertion opening 132, slot wall 1 1321, slot wall 2 1322, positive slot bottom 133, flat section 1331, inclined section 1332, positive slot opening 134, side slot opening 135, lead 2, elastic member 3, limiting block 31, sheet 1 32, sheet 2 33, connecting portion 34, rubber layer 35. DETAILED DESCRIPTION

[0035] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] In the description of the present invention, it should be noted that, unless otherwise specified, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. used in the description to indicate the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0037] Specific embodiments of the present invention are shown in the accompanying drawings.

[0038] A power transformer with a lead fixing structure comprises a frame 1, a lead 2 and an elastic member 3. A limit block 31 is provided on the elastic member 3, and the frame 1 comprises a side wall 11 and a side wall 2 12 which are arranged opposite to each other. In this embodiment, four through slots 13 are provided on each of the side walls 11 and the side wall 2 12, and the through slots 13 of the side wall 11 and the through slots 13 of the side wall 2 12 are arranged one by one. Insertion slots 131 are provided on the two opposite inner walls of the through slots 13, and the insertion slots 131 comprise insertion openings 132 for inserting opposite ends of the elastic member 3 into the insertion slots 131, and a limit slot 1311 is provided on the slot wall of the insertion slot 131 for the limit block 31 to be embedded and fixed.

[0039] The through groove 13 includes a positive groove bottom 133, a positive groove opening 134 opposite to the positive groove bottom 133, and two side groove openings 135 opposite to each other. The side groove openings 135 are connected to the positive groove opening 134. The positive groove bottom 133 includes a flat section 1331 and an inclined section 1332. The inclined section 1332 has two sections and is respectively arranged on both sides of the flat section 1331. The inclined section 1332 is arranged between the side groove opening 135 and the flat section 1331. The side of the inclined section 1332 close to the side groove opening 135 is inclined in a direction away from the positive groove opening 134. The inclined section 1332 is an arc-shaped surface convex in a direction close to the positive groove opening 134. The insertion port 132 is arranged on one of the side grooves 135.

[0040] When the limiting block 31 forms a limit with the limiting groove 1311 , the elastic member 3 is squeezed by the insertion groove 131 to be deformed, and a gap exists between the elastic member 3 and the positive groove bottom 133 .

[0041] When packaging is required, firstly wind the lead wire 2 on the frame 1, and make the lead wire 2 be located in the through slot 13 of the side wall 11 and the side wall 2 12. After winding, insert the elastic member 3 into the insertion slot 131 through the insertion port 132. Under the action of its own elastic force, the elastic member 3 forms a limit with the limit block 31 and the limit slot 1311, which can prevent the elastic member 3 from slipping out of the insertion slot 131 when no operator applies force. The elastic member 3 located in the insertion slot 131 can apply force to the part of the lead wire 2 located in the through slot 13, play the role of fixing the lead wire 2, and prevent the lead wire 2 from automatically unwinding during the movement of this embodiment. The through slot 13 can reduce the situation where the lead wire 2 is squeezed and bent, and can reduce the contact of the lead wire 2 with external objects during the movement of this embodiment, and ensure the normal use of the lead wire 2. When installation is required, the operator applies force to the elastic member 3 to disengage the limiting block 31 from the limiting groove 1311, and then the elastic member 3 can be taken out from the insertion groove 131. After taking it out, the lead 2 is unwound and the lead 2 can be normally connected to the external component.

[0042] During the movement of the present embodiment, the lead 2 may generate a certain relative displacement with the frame 1. The existence of the inclined section 1332 makes the edge of the positive groove bottom 133 smooth, ensuring that there is no sharp part of the positive groove bottom 133. This can prevent the portion of the lead 2 located at the edge of the positive groove bottom 133 from being damaged or bent due to relative displacement during the movement of the present embodiment.

[0043] In actual use, according to the length of the lead 2 and the position of the end, the elastic member 3 can be arranged in only part of the through slot 13, so as to facilitate the subsequent removal of the elastic member 3 and improve the removal efficiency. In this embodiment, a group of insertion slots 131 is arranged in one through slot 13, and one group of insertion slots 131 includes two insertion slots 131 arranged opposite to each other. According to actual use, two groups of insertion slots 131 can also be arranged in one through slot 13, and the insertion openings 132 of the insertion slots 131 in the two insertion slots 131 are respectively arranged on the two side notches 135.

[0044] The elastic member 3 includes a sheet 1 32, a sheet 2 33 and a connecting portion 34, wherein the sheet 1 32 and the sheet 2 33 are connected via the connecting portion 34, and the limiting block 31 is arranged on the surface of the sheet 1 32 facing away from the sheet 2 33, and the distance between the sheet 1 32 and the sheet 2 33 is smaller as it is closer to the connecting portion 34; when the limiting block 31 forms a limit with the limiting groove 1311, the opposite surfaces of the sheet 1 32 and the sheet 2 33 are respectively in contact with the two opposite groove walls of the insertion groove 131. The elastic member 3 has a simple structure and is convenient for production and processing. In order to reduce the overall weight of the present embodiment, the elastic member 3 can be made of plastic.

[0045] The insertion slot 131 includes a slot wall 1321 and a slot wall 1322 respectively located on both sides of the insertion opening 132. The slot wall 1321 is located on the side of the slot wall 1322 away from the positive slot bottom 133. The distance between the slot wall 1321 and the slot wall 1322 is larger as the slot wall 1321 is closer to the insertion opening 132. The limiting groove 1311 is located on the side of the slot wall 1321 close to the insertion opening 132. When the limiting block 31 forms a limit with the limiting groove 1311, the connecting portion 34 is located on the side of the sheet 1 32 away from the insertion opening 132. In this embodiment, after the limiting block 31 forms a limit with the limiting groove 1311, the surface of the sheet 1 32 facing away from the sheet 2 33 contacts the surface of the slot wall 1321, and the surface of the sheet 2 33 facing away from the sheet 1 32 contacts the surface of the slot wall 1322, thereby improving the stability of the elastic member 3. This allows the sheet 2 33 to stably press the portion of the lead 2 located in the through slot 13.

[0046] When the limiting block 31 forms a limit with the limiting groove 1311, the projection of the second sheet 33 on the positive groove bottom 133 spans the gentle section 1331 and the inclined section 1332, and the projection of the second sheet 33 on the gentle section 1331 is greater than or equal to the projection of the second sheet 33 on the inclined section 1332. During the insertion of the elastic member 3 into the insertion groove 131, the distance from the second sheet 33 to the positive groove bottom 133 is gradually reduced, so that the elastic member 3 gradually fixes the part of the lead 2 in the through groove 13 with the through groove 13, and prevents the lead 2 from being displaced greatly as the elastic member 3 is inserted into or leaves the insertion groove 131.

[0047] The cross section of the flat section 1331 parallel to the side notch 135 is an arc with a concave center away from the notch. When the number of turns of the lead 2 is greater than one, it is convenient for the lead 2 to be concentrated in the middle of the through slot 13, and it is convenient for the elastic member 3 to press the lead 2.

[0048] When the limiting block 31 forms a limit with the limiting groove 1311 , the angle between the sheet 1 32 and the sheet 2 33 is 15° to 20°, which is convenient for operators to apply force to the elastic member 3 and for the limiting block 31 to be separated from the limiting groove 1311 .

[0049] A rubber layer 35 is disposed on the surface of the second sheet 33 facing away from the first sheet 32 ​​, and the surface of the rubber layer 35 facing away from the second sheet 33 is an arc-shaped surface.

[0050] When the elastic member 3 presses the lead wire 2, a certain deformation can be generated to prevent the elastic member 3 from pressing too hard.

[0051] The cross section of the limiting block 31 is semi-elliptical or semi-circular, so that the limiting block 31 can be easily inserted into or removed from the limiting groove 1311 .

[0052] Compared with the existing lead fixing structure, this embodiment has a simple structure, is easy to produce, does not appear incompatible with other existing components, and ensures the effect of fixing the lead 2 without greatly increasing the volume of the transformer. The operation is simple and the packaging efficiency is improved. In addition, the transformer will generate heat during actual use, and the through groove 13 can increase the surface area of ​​the frame 1 and improve a certain heat dissipation effect.

[0053] The present invention is not limited to the above-mentioned specific implementation modes. A person skilled in the art may adopt other various specific implementation modes to implement the present invention based on the contents disclosed in the present invention, or any simple changes or modifications made to the design structure and concept of the present invention shall fall within the protection scope of the present invention.

Claims

1. A power transformer with a lead fixing structure, comprising a frame and leads, characterized in that: It also includes an elastic member, a limit block is provided on the elastic member, the frame includes a side wall 1 and a side wall 2 arranged back to back, at least two through grooves are provided on the side wall 1 and the side wall 2, the through groove of the side wall 1 and the through groove on the side wall 2 are arranged one by one, insertion grooves are provided on the two opposite inner walls of the through grooves, the insertion groove includes an insertion opening for the opposite two ends of the elastic member to be inserted into the insertion groove, and a limit groove for the limit block to be embedded and fixed is provided on the groove wall of the insertion groove; when the limit block forms a limit with the limit groove, the elastic member is squeezed by the insertion groove to produce deformation, and there is a gap between the elastic member and the groove bottom of the through groove.

2. The power transformer with a lead fixing structure according to claim 1, characterized in that: The through groove includes a main groove bottom, a main groove opening opposite to the main groove bottom, and two side groove openings arranged oppositely. The side groove openings are connected to the main groove opening. The main groove bottom includes a flat section and an inclined section. The inclined section has two sections and is respectively arranged on both sides of the flat section. The inclined section is arranged between the side groove openings and the flat section. The side of the inclined section close to the side groove opening is inclined toward the direction away from the main groove. The insertion port is arranged on one of the side groove openings.

3. The power transformer with a lead fixing structure according to claim 2, characterized in that: The elastic member includes a sheet body 1, a sheet body 2 and a connecting portion, wherein the sheet body 1 and the sheet body 2 are connected via the connecting portion, and the limit block is arranged on the surface of the sheet body 1 facing away from the sheet body 2, and the distance between the sheet body 1 and the sheet body 2 becomes smaller as it is closer to the connecting portion; when the limit block forms a limit with the limit groove, the opposite surfaces of the sheet body 1 and the sheet body 2 respectively abut against the two opposite groove walls of the insertion groove.

4. The power transformer with a lead fixing structure according to claim 3, characterized in that: The inclined section is an arc-shaped surface convex toward the direction close to the positive notch.

5. The power transformer with a lead fixing structure according to claim 4, characterized in that: The insertion groove includes groove wall 1 and groove wall 2 respectively located on both sides of the insertion port, groove wall 1 is located on the side of groove wall 2 away from the bottom of the groove, and the distance between groove wall 1 and groove wall 2 increases as it is closer to the insertion port, and the limit groove is located on the side of groove wall 1 close to the insertion port; when the limit block forms a limit with the limit groove, the connecting portion is located on the side of sheet body 1 away from the insertion port.

6. The power transformer with a lead fixing structure according to claim 5, characterized in that: When the limiting block and the limiting groove form a limit, the projection of the second sheet on the bottom of the positive groove spans the flat section and the inclined section, and the projection of the second sheet on the flat section is greater than or equal to the projection of the second sheet on the inclined section.

7. The power transformer with a lead fixing structure according to claim 6, characterized in that: The cross section of the flat section along the direction parallel to the side notch is an arc with the middle portion concave in the direction away from the notch.

8. The power transformer with a lead fixing structure according to claim 7, characterized in that: When the limiting block and the limiting groove form a limit, the angle between the sheet body 1 and the sheet body 2 is 10° to 25°.

9. The power transformer with a lead fixing structure according to claim 8, characterized in that: A rubber layer is arranged on the surface of the second sheet body facing away from the first sheet body, and the surface of the rubber layer facing away from the second sheet body is an arc-shaped surface.

10. The power transformer with a lead fixing structure according to claim 9, characterized in that: The cross section of the limiting block is semi-elliptical or semi-circular.

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