Small transformer structure

Abstract

According to the technical scheme, the small transformer structure is characterized by comprising a framework, an upper plate and a lower plate, a primary coil is wound on the framework, the primary coil is wrapped with an insulating layer, a secondary coil is wound on the outer side of the insulating layer, two input end rods are arranged on the two sides of the lower plate, and the input end rods are connected with the lower plate. The two ends of the primary coil are connected to the two input end rods respectively. Limiting grooves are formed in the two sides of the upper plate, wire outlet notches are formed in the limiting grooves, the two ends of the secondary coil extend into the limiting grooves in the two sides respectively and extend out of the wire outlet notches after being bent, and the extending parts form output end rods. The utility model can better adapt to a transformer with a thicker secondary coil.

Description

Technical Field

[0001] The utility model relates to the technical field of transformers, and more particularly to a small transformer structure. Background Art

[0002] Common small transformers generally include a skeleton, a primary coil and a secondary coil. The primary coil is connected to the power supply end and is generally set to a higher voltage and more turns, but the current is relatively small, so it is wound with thinner wires. The secondary coil is connected to the load end and generally has fewer turns. After the transformation ratio, the voltage is lower, but the current is larger, so it is wound with thicker wires.

[0003] At present, when assembling the above-mentioned small transformer, the input terminal rod for connecting to the power supply end and the output terminal rod for connecting to the load are first installed, and then the wire ends of the primary coil and the wire ends of the secondary coil are respectively wound around the input terminal rod and the output terminal rod and then welded and fixed. However, in actual assembly, it is found that the wire of the primary coil is relatively thin and can be wound around the corresponding end rod well, while the wire of the secondary coil of some specifications of transformers is very thick and is difficult to wind around the corresponding end rod, or is particularly bloated after being wound. Therefore, for small transformers with relatively thick secondary coil wires, the existing structure is not suitable and needs to be improved. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the present invention provides a small transformer structure that can better adapt to transformers with thicker secondary coils.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a small transformer structure, comprising a skeleton, an upper plate and a lower plate, wherein a primary coil is wound on the skeleton, the primary coil is wrapped with an insulating layer, a secondary coil is wound on the outside of the insulating layer, two input end rods are provided on both sides of the lower plate, and the two ends of the primary coil are respectively connected to the two input end rods; limiting grooves are provided on both sides of the upper plate, and the limiting grooves are provided with outlet notches, the two ends of the secondary coil respectively extend into the limiting grooves on both sides and extend from the outlet notches after being bent, and the extended parts form output end rods.

[0006] The utility model is further configured as follows: the limiting groove includes a vertical groove and a horizontal groove, the vertical groove extends from the outside to the inside for the wire end of the secondary coil to enter from the outside, and the horizontal groove is connected to the inner end of the vertical groove and extends perpendicular to the vertical groove, and is used to limit the wire end of the secondary coil.

[0007] The utility model is further configured as follows: the wire outlet notch is arranged on the outer side wall of the transverse groove.

[0008] The present invention is further configured such that the width of the transverse slot matches the wire diameter of the secondary coil.

[0009] The utility model is further configured such that the size of the wire outlet gap matches the wire diameter of the secondary coil.

[0010] The utility model is further configured as follows: the lower plate is provided with a wire groove and a fixing hole, the input end rod is fixedly installed in the fixing hole, and the wire end of the primary coil passes through the wire groove and is wound around the input end rod and fixed by welding.

[0011] The utility model is further configured such that surfaces of the output end rod and the input end rod are both galvanized.

[0012] In summary, the present invention has the following beneficial effects:

[0013] Compared with the prior art, the utility model is provided with a limiting groove and a wire outlet notch on the upper plate, the wire of the secondary coil is clamped in the limiting groove for limiting, and then the wire is bent and extended from the notch, thereby directly forming an output end rod through the wire of the secondary coil. When the wire of the secondary coil is thicker, the structure of the utility model is simpler and more reasonable, and the structure will not be bloated due to the thick wire of the secondary coil, which is conducive to maintaining a smaller size of the small transformer and is more convenient for production and assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the transformer.

[0015] Figure 2 It is a schematic diagram of the upper plate and lower plate structure.

[0016] Figure 3 It is a schematic diagram of the internal structure after the insulation layer is cut open.

[0017] Figure numerals: 1. Skeleton; 11. Primary coil; 12. Insulation layer; 13. Secondary coil; 2. Upper plate; 3. Lower plate; 4. Input end rod; 5. Limiting groove; 501. Vertical groove; 502. Horizontal groove; 6. Wire outlet notch; 7. Output end rod; 8. Wire passing groove; 9. Wire end of primary coil; 10. Wire end of secondary coil. DETAILED DESCRIPTION

[0018] The present invention will be described in further detail below with reference to the accompanying drawings.

[0019] This embodiment discloses a small transformer structure, such as Figure 1-3As shown, it includes a skeleton 1, an upper plate 2 and a lower plate 3, a primary coil 11 is wound on the skeleton 1, the primary coil 11 is wrapped with an insulating layer 12, and a secondary coil 13 is wound on the outside of the insulating layer 12, two input end rods 4 are provided on both sides of the lower plate 3, and the two ends of the primary coil 11 are respectively connected to the two input end rods 4; in the above structure, the lower plate 3 is provided with a wire groove 8 and a fixing hole, and the input end rod 4 is fixedly installed in the fixing hole. During assembly, the wire end 9 of the primary coil is passed through the wire groove 8 and wound around the input end rod 4 for pre-fixation, and then fixed by welding after the assembly is completed. Generally speaking, the primary coil 11 of a small transformer has a high voltage but low current and a large number of turns, so it uses thinner wire and can be easily wound around the input terminal rod 4 for assembly. However, if the transformer is larger, the secondary coil has a low voltage but high current and a small number of turns, so it uses thicker wire. In this case, if the same structure as the primary coil is used, the secondary coil wire end 10 will be difficult to wind around the terminal rod, or the winding will occupy a very large volume, making the structure particularly bloated. Therefore, this embodiment adopts a structure in which the secondary coil wire end 10 directly forms the output terminal rod 7.

[0020] Specifically, both sides of the upper plate 2 are provided with a limit slot 5, and the limit slot 5 is provided with a wire outlet notch 6. The two ends of the secondary coil 13 extend into the limit slots 5 on both sides and extend from the wire outlet notch 6 after being bent. The extended part forms the output end rod 7. Figure 1-2 The limiting groove 5 and the wire outlet notch 6 are used to clamp the wire end conductor of the bent secondary coil 13 to form a relatively fixed structure. At the same time, glue can be applied to reinforce the wire outlet notch 6 after assembly is completed.

[0021] Further references Figure 2 The limiting slot 5 includes a vertical slot 501 and a horizontal slot 502. The vertical slot 501 extends from the outside to the inside, allowing the wire end of the secondary coil 13 to enter from the outside. The horizontal slot 502 connects to the inner end of the vertical slot 501 and extends perpendicular to the vertical slot 501 to limit the wire end of the secondary coil 13. The vertical slot 501 and the horizontal slot 502 form an "L"-shaped structure. Once the wire is inserted into the slot, it is not easy to fall out, ensuring stability during assembly. At the same time, the assembly method of the vertical slot 501 and the horizontal slot 502 is very simple and can be easily operated whether it is processed manually or by automated machinery.

[0022] Furthermore, the width of the transverse slot 502 matches the wire diameter of the secondary coil. Since the transverse slot mainly acts as a limiter, the width of the transverse slot 502 is preferably slightly larger than the wire diameter of the secondary coil so that the transverse slot 502 can have sufficient friction to fix the wire end.

[0023] Further, refer to Figure 1-2The wire outlet notch 6 is provided on the outer wall of the transverse slot 502. The size of the notch 6 matches the wire diameter of the secondary coil 13. With this structure, the wire end of the secondary coil 13 can be inserted into the wire outlet notch 6 by simply bending it downward. It is also preferable that the notch size is slightly larger than the wire diameter of the secondary coil 13, or the two are substantially the same, so that the wire end can be firmly held by the notch 6.

[0024] Furthermore, in order to ensure the reliability of the connection with the external power supply or load, the surfaces of the output end rod 7 and the input end rod 4 are both galvanized to improve the corrosion resistance and mechanical strength of the output end rod 7 and the input end rod 4.

[0025] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the design concept of the present invention should be included in the scope of protection of the present invention.

Claims

1. A small transformer structure, characterized in that: The invention comprises a skeleton (1), an upper plate (2) and a lower plate (3); a primary coil (11) is wound on the skeleton (1); an insulating layer (12) is wrapped around the primary coil (11); a secondary coil (13) is wound around the outer side of the insulating layer (12); two input end rods (4) are provided on both sides of the lower plate (3); two ends of the primary coil (11) are respectively connected to the two input end rods (4); limiting grooves (5) are provided on both sides of the upper plate (2); the limiting grooves (5) are provided with outlet notches (6); the two ends of the secondary coil (13) are respectively extended into the limiting grooves (5) on both sides and extended from the outlet notches (6) after being bent, and the extended parts form output end rods (7).

2. A small transformer structure according to claim 1, characterized in that: The limiting groove (5) comprises a vertical groove (501) and a horizontal groove (502), wherein the vertical groove (501) extends from the outside to the inside for the wire end of the secondary coil (13) to enter from the outside, and the horizontal groove (502) is connected to the inner end of the vertical groove (501) and extends perpendicularly to the vertical groove (501) to limit the wire end of the secondary coil (13).

3. A small transformer structure according to claim 2, characterized in that: The wire outlet notch (6) is arranged on the outer side wall of the transverse groove (502).

4. A small transformer structure according to claim 2, characterized in that: The width of the transverse slot (502) matches the wire diameter of the secondary coil.

5. A small transformer structure according to claim 1 or 3, characterized in that: The size of the wire outlet notch (6) matches the wire diameter of the secondary coil (13).

6. A small transformer structure according to claim 1, characterized in that: The lower plate (3) is provided with a wire groove (8) and a fixing hole, the input end rod (4) is fixedly installed in the fixing hole, and the wire end of the primary coil (11) passes through the wire groove (8) and is wound around the input end rod (4) and fixed by welding.

7. A small transformer structure according to claim 1, characterized in that: The surfaces of the output end rod (7) and the input end rod (4) are both galvanized.

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