CN211507350U

CN211507350U - Flat transformer framework

Info

Publication number: CN211507350U
Application number: CN201922395971.1U
Authority: CN
Inventors: 王宗友; 刘瑶成; 杨千
Original assignee: Guangdong Songsheng Power Technology Co ltd
Current assignee: Guangdong Songsheng Power Technology Co ltd
Priority date: 2019-12-26
Filing date: 2019-12-26
Publication date: 2020-09-15
Anticipated expiration: 2029-12-26

Abstract

The utility model relates to a flat transformer framework, which comprises a winding post with a central hole, a first baffle and a second baffle, wherein the first baffle and the second baffle are formed by extending outwards along two ends of the winding post; a first positioning unit and a second positioning unit are respectively arranged on two sides of the first baffle; a primary terminal table and a secondary terminal table are respectively arranged on two sides of the second baffle; pin terminals are arranged at the primary terminal table and the secondary terminal table; the width of the primary terminal block is larger than that of the secondary terminal block, and the pin terminal is L-shaped. The implementation of the technical scheme has the following advantages: under the condition of ensuring the area of the magnetic core, the number of turns of the coil and the creepage distance, the height of the transformer framework is reduced, the requirement of a customer on the strict requirement of the height is met, and the transformer framework is simple in structure and manufacturing process and has higher practicability.

Description

Flat transformer framework

Technical Field

The utility model relates to a transformer skeleton, more specifically say, relate to a flat transformer skeleton that has the requirement to high.

Background

The conventional EQ transformer bobbin, particularly the EQ41 transformer bobbin, is a flat transformer bobbin with a relatively small height. Those skilled in the art have made various improvements in order to maximize the power in the limited transformer volume, for example, in order to maximize the number of winding turns on the winding leg, to end the winding at the winding end, and to provide a V-groove or a through hole at the positioning structure at the upper end in the winding direction, but this results in a reduction in the assembled core area, thereby reducing the magnetic flux, and thus, cannot maximize the power in the limited transformer volume. For another example, in order to better meet the safety requirements, the distance between the primary pin terminal and the magnetic core, that is, the creepage distance, needs to be increased, and a strip-shaped hole is formed between the primary pin terminal and the magnetic core, and the V-shaped groove is used, so as to maximize the power in the limited transformer volume. However, the thickness of the baffles at the two ends of the winding post is increased due to the arrangement of the V-shaped groove and the design of the strip-shaped hole, otherwise, the risk of shortening the service life due to insufficient strength of the baffles will occur, but the requirement for the height of the flat transformer in the prior art is relatively strict, and the transformer cannot meet the height requirement, and has a complex structure, thereby resulting in a complex process.

Therefore, in a certain volume, especially in a certain height, the EQ type transformer that can maximally ensure the magnetic core area, the coil bundle number and the creepage distance, thereby ensuring the power requirement, and can realize simple process, mass production and more practicability becomes one of the technical problems to be solved urgently.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model lies in providing a flat type transformer skeleton: under the condition of ensuring the area of the magnetic core, the number of turns of the coil and the creepage distance, the height of the transformer framework is reduced, and the requirement of a customer on the strict requirement of the height is met.

The utility model provides a technical scheme that its technical problem adopted is: constructing a flat transformer framework, which comprises a winding post with a central hole, a first baffle and a second baffle, wherein the first baffle and the second baffle are formed by extending outwards along two ends of the winding post;

a first positioning unit and a second positioning unit are respectively arranged on two sides of the first baffle; a primary terminal table and a secondary terminal table are respectively arranged on two sides of the second baffle; pin terminals are arranged at the primary terminal table and the secondary terminal table; the width of the primary terminal block is larger than that of the secondary terminal block, and the pin terminal is L-shaped.

In some embodiments, the second baffle includes a second mounting surface facing the first baffle, and the corners of the pin terminals are disposed adjacent to the second mounting surface.

In some embodiments, the pin terminals are wired at the primary and secondary terminal blocks.

In some embodiments, the pin terminal is cylindrically L-shaped.

In some embodiments, the first positioning unit comprises a first positioning part perpendicular to the first baffle and a first positioning clamping groove with a reinforcing rib, which is formed along the end part of the first positioning unit; the second positioning unit comprises a second positioning part perpendicular to the first baffle and a second positioning clamping groove with reinforcing ribs, and the second positioning clamping groove is formed along the end part of the second positioning unit.

In some embodiments, the first positioning portion has a rectangular shape with rounded corners, the first positioning slot has a U-shape, and a slot bottom of the first positioning slot is located on a side plane of the first positioning portion facing outward; the second positioning part is a rectangle with a decoration fillet, the second positioning clamping groove is U-shaped, and the groove bottom of the second positioning clamping groove is located on the side plane where the long edge of the second positioning part faces outwards.

In some embodiments, the first positioning unit and the second positioning unit are symmetrically arranged.

In some embodiments, the pin terminals include a primary pin terminal and a secondary pin terminal; the secondary pin terminals comprise 8 non-equidistant secondary pin terminals, the middle secondary pin terminals are 4 and are used for connecting high current or high voltage, and the distance between each 2 secondary pin terminals on two sides and the middle 4 secondary pin terminals is pulled apart.

In some embodiments, a primary wire clamping groove is formed between every two adjacent pin terminals on the primary terminal block; and a secondary wire clamping groove is formed between every two adjacent pin terminals of the secondary terminal block.

In some embodiments, the secondary card wire slot has a slot width that varies due to the difference in distance between each adjacent two secondary pin terminals.

In some embodiments, the primary wire clamping groove and the secondary wire clamping groove are U-shaped, and the opening of each U-shaped groove is slightly smaller than the width of the U-shaped groove.

Implement the utility model discloses an above-mentioned flat transformer skeleton has following beneficial effect: under the condition of ensuring the area of the magnetic core, the number of turns of the coil and the creepage distance, the height of the transformer framework is reduced, the requirement of a customer on the strict requirement of the height is met, and the transformer framework is still simple in structure, simple in manufacturing process and more practical.

Drawings

The invention will be further explained with reference to the drawings and examples, wherein:

fig. 1 is a schematic structural diagram of a flat transformer bobbin according to some embodiments of the present invention;

FIG. 2 is a top view of the flat transformer bobbin of FIG. 1;

FIG. 3 is a right side view of the flat transformer bobbin of FIG. 1;

FIG. 4 is a front view of the flat transformer bobbin of FIG. 1;

fig. 5 is a schematic structural diagram of the flat transformer bobbin shown in fig. 1 with the second baffle facing upward.

Detailed Description

For a clearer understanding of the technical features, objects, and effects of the present invention, reference will now be made to the accompanying drawings.

Fig. 1 to 5 are schematic structural diagrams of a flat transformer (EQ type) according to some embodiments of the present invention, which may include a winding post 10, and a first baffle 20 and a second baffle 30 extending along two end faces of the winding post 10 and substantially in the respective planes of the two opposite end faces. The winding post 10 is used for winding and is cylindrical with a central hole; the first baffle 20 and the second baffle 30 are respectively located at two ends of the winding post 10 and extend outwards with the winding post 10 as a center. The first baffle 20 may be used for installation positioning. The second shutter 20 may be used to provide a boss on which the pin terminals 40 are further provided.

The first baffle 20 is provided at both sides thereof with a first positioning unit 21 and a second positioning unit 22, respectively. Preferably, the first positioning unit 21 and the second positioning unit 22 have the same shape and structure, are located at two sides of the winding post 10, and are symmetrically arranged. The design simplifies the manufacturing process under the condition of not reducing the area of the assembled magnetic core, and has the advantages of improving the yield, reducing the processing cost, reducing the error value and the like. Of course, an asymmetric arrangement may be adopted, as long as the winding number of the winding wire on the winding post 10 is maximized at a certain height of the winding post 10, and the height of the flat transformer (EQ type) may not be increased. For example, the first baffle 20 may be provided with a semi-elliptical positioning portion, and the second baffle 30 may be provided with a hole or a groove for the free end of the winding to pass through or be hooked. The first positioning unit 21 and the second positioning unit 22 are smoothly transited, for example, rounded corners or circular arc corners. So as to reduce stress concentration and influence the strength of the steel.

The first positioning unit 21 may include a first positioning portion 211 located on one side of the first baffle 20 and extending outward perpendicular to the first baffle 20, wherein the first positioning portion 211 is substantially rectangular, and two short sides of the rectangle are modified into arc shapes to increase the strength thereof. The first positioning unit 21 further includes a substantially U-shaped first positioning slot 212 along the same side end of the first baffle 20, and a bottom surface of the first positioning slot 212 is located on an outer side surface of the first baffle 20, that is, a depth direction of the first positioning slot 212 is perpendicular to a side surface of the long side of the first baffle 20. In some embodiments, reinforcing ribs are disposed on both sides of the slot of the first locator card slot 212. The first detent 212 may also have other shapes.

The second positioning unit 22 may include a second positioning portion 221 located at the other side of the first baffle 20 and extending outward perpendicular to the first baffle 20, the second positioning portion 221 is substantially rectangular, and two short sides of the rectangle are modified into arc shapes to increase the strength thereof. The second positioning unit 22 further includes a substantially U-shaped second positioning engaging groove 222 along the same side end of the first baffle 20, and a bottom surface of the second positioning engaging groove 222 is located on an outer side surface of the first baffle 20, that is, a depth direction of the second positioning engaging groove 222 is perpendicular to a side surface of the long side of the first baffle 20. In some embodiments, reinforcing ribs are disposed on both sides of the slot of the second detent slot 222. The second detent 222 may have other shapes.

The second shutter 30 may include primary and

secondary terminal blocks

31 and 32 at both sides thereof and protruding downward. The primary terminal block 31 and the secondary terminal block 32 are substantially rectangular, and the width of the primary terminal block 31 is larger than that of the secondary terminal block 32, so as to satisfy the safety requirements.

As shown in fig. 5, pin terminals 40 are provided on the primary terminal block 31 and the secondary terminal block 32. Pin terminal 40 is cylindrical L-shaped. The pin terminal 40 may be mounted at the primary terminal block 31 and the secondary terminal block 32 in a wire-hanging manner. The hanging wire has no problems of fulcrum and high welding spot, the height of the boss can be reduced to a certain degree, and the height of the whole product is reduced. One side of the pin terminal 40 is perpendicular to the plane of the boss, and the other end extends outward. And the length of the epitaxial side of the pin terminal 40 can be adjusted to meet the design requirement of high current. In some embodiments, the corner end of the pin terminal is disposed deep in the boss to ensure the reliability of the body and prevent the transformer bobbin from being damaged due to the insertion of the pin terminal 40.

In some embodiments, pin terminals 40 include a primary pin terminal 41 located in primary terminal block 31 and a secondary pin terminal 42 located at secondary terminal block 32. The primary pin terminal 41 may include a plurality of primary pin terminals 41 arranged along the length direction of the primary terminal block 31. Preferably, six of the primary pin terminals 41 may be included. The six primary pin terminals 41 may also be non-uniformly arranged. In some embodiments, a primary wire clamping groove 310 is formed between every two adjacent primary pin terminals 41, and the wire clamping groove can meet the requirement of wire hanging and wire entering, so that no stacking phenomenon exists between winding wires and wires, and the reliability of products is guaranteed. The secondary pin terminal 42 may include a plurality of secondary pin terminals 42 disposed along the length of the secondary terminal block 32. Preferably, eight secondary pin terminals 42 may be included. The middle four of the eight secondary pin terminals 42 may be uniformly arranged for connection of a large current or a large voltage. The central four secondary pin terminals 42 may also be non-uniformly arranged with different pitches. The two secondary pin terminals 42 on both sides are separated from the four secondary pin terminals 42 in the middle as shown in fig. 2, so as to prevent the tin connection phenomenon caused by the tail connection with the winding. However, there is no certain distance between the two secondary pin terminals 42 on both sides, which can satisfy the requirement of hanging two secondary pin terminals 42 to carry large current. In some embodiments, a secondary card wire slot 320 is provided between each adjacent two secondary pin terminals 42. The secondary card wire slot 320 has different widths according to the different pitches. For example, the width of the secondary card wire groove 320 between the middle four secondary pin terminals 42 and the two secondary pin terminals 42 on both sides is larger than the width between the secondary card wire grooves 320 between every two adjacent secondary pin terminals 42 on the middle four secondary pin terminals, and may be equal to or smaller than the width. Eight secondary pin terminals are adopted, and the requirement of multidirectional pin hanging can be met. When the transformer meets the requirement of secondary output, other power supplies can be provided, such as the transformer supplies power to the fan.

According to the flat transformer (EQ type), the distance between the PIN foot of the transformer framework and the magnetic core slot position is pulled open, and the safety requirements are met. Meanwhile, in the design, the 6 PIN PINs are primary and are insulating wires, the magnetic core is secondary, the secondary voltage is low, and under the condition of high limit of the shell, the safety of a power supply product to people is ensured, and the flattening capability of the EQ structure is further highlighted.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and implement the present invention accordingly, which can not limit the protection scope of the present invention. All equivalent changes and modifications made within the scope of the claims of the present invention shall fall within the scope of the claims of the present invention.

It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are considered to be within the scope of the invention as defined by the following claims.

Claims

1. A flat transformer framework comprises a winding post (10) with a central hole, a first baffle (20) and a second baffle (30), wherein the first baffle (20) and the second baffle (30) are formed by extending outwards along two ends of the winding post (10); a first positioning unit (21) and a second positioning unit (22) are respectively arranged on two sides of the first baffle (20); a primary terminal table (31) and a secondary terminal table (32) are respectively arranged on two sides of the second baffle plate (30); pin terminals (40) are arranged at the primary terminal block (31) and the secondary terminal block (32); characterized in that the width of the primary terminal block (31) is greater than the width of the secondary terminal block (32), and the pin terminal (40) is L-shaped.

2. The pancake transformer bobbin according to claim 1, wherein the second baffle (30) includes a second mounting surface (33) facing the first baffle (20), and corners of the pin terminals (40) are disposed adjacent to the second mounting surface (33).

3. The flat type transformer bobbin according to claim 2, wherein the pin terminals are provided at the primary terminal block (31) and the secondary terminal block (32) in a wire hanging manner; the pin terminal (40) is cylindrical L-shaped.

4. The flat transformer bobbin of any one of claims 1 to 3, wherein the first positioning unit (21) comprises a first positioning part (211) perpendicular to the first baffle (20) and a first positioning slot (212) with reinforcing ribs arranged along the end part of the first positioning unit (21); the second positioning unit (22) comprises a second positioning part (221) perpendicular to the first baffle (20) and a second positioning clamping groove (222) with reinforcing ribs, wherein the second positioning clamping groove is formed along the end part of the second positioning unit (22).

5. The flat transformer bobbin as recited in claim 4, wherein the first positioning portion (211) is rectangular with rounded corners, the first positioning slot (212) is U-shaped, and a slot bottom of the first positioning slot (212) is located on a side plane of the first positioning portion (211) facing outward; the second positioning portion (221) is rectangular with a modified round angle, the second positioning clamping groove (222) is U-shaped, and the groove bottom of the second positioning clamping groove (222) is located on a side plane where the long edge of the second positioning portion (221) faces outwards.

6. The flat transformer bobbin as recited in claim 5, wherein the first positioning unit (21) and the second positioning unit (22) are symmetrically arranged along the winding post (10).

7. The flat transformer bobbin of claim 1, wherein the pin terminals (40) comprise a primary pin terminal (41) and a secondary pin terminal (42); the secondary pin terminal (42) comprises 8 non-equidistant secondary pin terminals (42), the middle 4 secondary pin terminals (42) are used for connecting high current or high voltage, and the distance between the secondary pin terminals (42) and the middle 4 secondary pin terminals (42) is separated by 2 secondary pin terminals (42) on two sides.

8. The flat transformer bobbin of claim 7, wherein a primary wire clamping groove (310) is formed between every two adjacent pin terminals (40) on the primary terminal block (31); and a secondary wire clamping groove (320) is formed between every two adjacent pin terminals (40) of the secondary terminal table (32).

9. The flat transformer bobbin of claim 8, wherein the primary wire clamping groove (310) and the secondary wire clamping groove (320) are U-shaped, and the opening width of the primary wire clamping groove (310) is slightly smaller than the groove width of the primary wire clamping groove (310); the opening width of the secondary wire clamping groove (320) is slightly smaller than the groove width of the secondary wire clamping groove (320).

10. A transformer, characterized by comprising a flat transformer bobbin as claimed in any one of claims 1 to 9.