CN212161536U

CN212161536U - Transformer safety isolation device and transformer with same

Info

Publication number: CN212161536U
Application number: CN202021251258.6U
Authority: CN
Inventors: 解耀祖
Original assignee: Dongguan Rongtechnetium Technology Co ltd
Current assignee: Dongguan Rongtechnetium Technology Co ltd
Priority date: 2020-07-01
Filing date: 2020-07-01
Publication date: 2020-12-15
Anticipated expiration: 2030-07-01

Abstract

The transformer safety isolation device comprises a framework, a magnetic core, an insulating sleeve, a primary side pin and a secondary side pin, wherein the magnetic core is accommodated and fixed in the insulating sleeve, and the framework is arranged in the magnetic core and fixedly connected to the magnetic core; the framework comprises a body and a stretching part, the stretching part is arranged on a primary side, a primary winding and a secondary winding are wound on the body, a plurality of wire grooves are formed in the stretching part and are arranged at intervals, a boss is formed between every two adjacent wire grooves, at least one primary side pin is arranged in a staggered mode, and the depths of at least two adjacent wire grooves are different. Because the depths of the adjacent wire grooves are different, the output lines of the primary winding are distributed in a staggered manner, and the width of the required stretching part can be smaller under the condition of realizing the same safety spacing of the output lines, so that the purposes of reducing the volume of the transformer and reducing the occupied area of a PCB (printed circuit board) are achieved.

Description

Transformer safety isolation device and transformer with same

Technical Field

The application relates to the field of transformers, in particular to a transformer safety isolation device and a transformer with the same.

Background

The transformer is divided into a primary side pin and a secondary side pin, and the output wires of the primary side and the secondary side need to keep a sufficient safety distance. The scheme adopted in the early period is that a magnetic core is used as an intermediate body, a primary side and a secondary side are separated by a wall blocking rubber shell on a framework, and meanwhile, all leading wires of the primary side and the secondary side are separated by a sleeve, so that the safety distance is ensured, which is a common method in the last 90 th century, and as a result, the transformer is large in volume due to process influence, large in leakage inductance and low in effective utilization rate of the magnetic core. When a more effective insulation operation mode is not available, in order to effectively utilize the volume of the transformer in the industry, the scheme is that the safety distance between the secondary and the transformer body is pulled open by using a flying wire mode or the primary and secondary are isolated by using the flying wire mode in combination with an outer-wrapping insulation tape mode, and as a result, the operation difficulty is increased no matter device production or final finished product assembly production, the flying wire needs to be inserted by manual accurate positioning during insertion, and the maximum influence is time effectiveness and cost. After 2000, the secondary side of the framework is pulled away from the magnetic core, so that the distance between the primary side and the secondary side is increased, the safety distance is ensured, and the problems that the transformer is influenced by the process, the size is large, and the occupied area of a PCB is large are brought.

SUMMERY OF THE UTILITY MODEL

Therefore, it is necessary to provide a transformer safety isolation device and a transformer having the same, aiming at the problems that the transformer is affected by the process, has a large volume and occupies a large area of the PCB.

The first aspect of the application provides a transformer safety isolation device, which comprises a framework, a magnetic core, an insulating sleeve, a primary side pin and a secondary side pin, wherein the transformer safety isolation device is provided with a primary side and a secondary side which are arranged oppositely, the primary side and the secondary side are electrically insulated through the magnetic core, the magnetic core is accommodated and fixed in the insulating sleeve, the framework is arranged in the magnetic core and is fixedly connected to the magnetic core, the primary side pin is arranged on the primary side and is fixedly connected to the framework, and the secondary side pin is arranged on the secondary side and is arranged outside the insulating sleeve;

the framework comprises a body and a stretching part, the stretching part is arranged on the primary side and fixedly connected to the body, a primary winding and a secondary winding are wound on the body, the primary side pin is fixed on the stretching part, an output wire of the primary winding is fixed on the primary side pin in a surrounding manner, the secondary winding is fixed on one end of the body, far away from the stretching part, in a surrounding manner, and an output wire of the secondary winding is fixed on the secondary side pin in a surrounding manner;

the stretching part is provided with a plurality of wire grooves which are arranged at intervals, a boss is formed between every two adjacent wire grooves, at least one primary side pin is arranged in a staggered mode, and the depths of at least two adjacent wire grooves are different.

In one embodiment, two ends of the body are provided with baffles, the baffles limit the primary winding and the secondary winding, and the stretching part is fixed on one of the baffles.

In one embodiment, the depth of the wire guide groove gradually decreases from the middle to both sides of the stretching part, and all the primary side stitches are arranged in an inner arc shape.

In one embodiment, a first retracted position is arranged on the insulating sleeve corresponding to the stretching portion, and at least one primary side stitch passes through the first retracted position.

In one embodiment, the framework comprises a first end and a second end which are oppositely arranged, the stretching part is fixed at the first end, and the secondary side stitch is arranged on one side of the insulating sleeve close to the first end.

In one embodiment, the outer side wall of the insulating sleeve is provided with a second retracted position, and the secondary side pins are arranged in the second retracted position;

the second inner contraction position is arranged at a position, close to the first end, of the insulating sleeve, and the secondary winding is wound at the second end of the framework.

In one embodiment, the outer side wall of the insulating sleeve is provided with a rib, the rib is arranged corresponding to the secondary side pins, and at least one rib is correspondingly arranged between every two adjacent secondary side pins.

In one embodiment, the outer side wall of the insulating sleeve is also provided with a convex hull structure corresponding to the convex ridge.

In one embodiment, the framework is provided with a positioning column, the insulating sleeve is provided with a positioning hole corresponding to the positioning column, and the positioning column is inserted into the positioning hole, so that the framework is fixedly connected with the insulating sleeve.

Above-mentioned transformer safety isolating device, through be provided with a plurality of metallic channels on tensile portion, a plurality of metallic channels set up at intervals each other, form the boss between two adjacent metallic channels, at least one primary side pin dislocation set, the degree of depth of adjacent metallic channel is different, dislocation distribution has been realized to primary winding's output line, under the condition of realizing the equal ann rule interval of output line, the width of required tensile portion can be littleer, in order to reach and reduce the transformer volume, reduce the purpose that occupies the PCB area.

In a second aspect, the present application provides a transformer, which includes any one of the above-mentioned transformer safety isolation devices.

Because the transformer is provided with the transformer safety isolation device, the transformer safety isolation device has the beneficial effect that the transformer also responds to the transformer.

Drawings

Fig. 1 is a schematic structural diagram of a transformer safety isolating device according to an embodiment of the present application;

fig. 2 is a schematic structural diagram of another side of the transformer safety isolating device according to an embodiment of the present application;

fig. 3 is a schematic cross-sectional view illustrating a transformer safety isolating apparatus according to an embodiment of the present application;

fig. 4 is a schematic structural diagram of a framework of a transformer safety isolation device according to an embodiment of the present application;

fig. 5 is a schematic structural diagram of the other side of the framework of the transformer safety isolation device according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of an insulating sleeve of a transformer safety isolating device according to an embodiment of the present application;

fig. 7 is a schematic structural diagram of the other side of the insulating sleeve of the transformer safety isolating device according to an embodiment of the present application.

Detailed Description

To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present application are given in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 and fig. 2, a schematic structural diagram of a transformer safety isolating device 10 according to an embodiment of the present application is exemplarily shown, where the transformer safety isolating device 10 includes a bobbin 110, a magnetic core 120, an insulating sleeve 130, a primary pin 140 and a secondary pin 150, the transformer safety isolating device 10 has a primary side and a secondary side that are oppositely disposed, the primary side and the secondary side are electrically insulated by the magnetic core 120, the magnetic core 120 is received and fixed in the insulating sleeve 130, the bobbin 110 is disposed in the magnetic core 120 and is fixedly connected to the magnetic core 120, the primary pin 140 is disposed on the primary side and is fixedly connected to the bobbin 110, and the secondary pin 150 is disposed on the secondary side and is disposed outside the insulating sleeve 130.

Referring to fig. 4 and 5, the bobbin 110 includes a body 111 and a stretching portion 113, the stretching portion 113 is disposed on a primary side and fixedly connected to the body 111, the stretching portion 113 is disposed at one end of the body 111, a primary winding (not shown) and a secondary winding (not shown) are wound on the body 111, a pin 140 on the primary side is fixed to the stretching portion 113, an output wire of the primary winding is wound and fixed on the pin 140 on the primary side, the secondary winding is wound and fixed on one end of the body 111 away from the stretching portion 113, and an output wire of the secondary winding is wound and fixed on a pin 150 on the secondary side.

The body 111 may have a hollow structure, and a through hole 111a is formed therein, and the magnetic core 120 is at least partially received in the through hole 111a, so that the bobbin 110 is fixed in the magnetic core 120. For example, referring to fig. 3, the magnetic core 120 may include a first portion 121 and a second portion 123, the first portion 121 and the second portion 123 are generally provided with a plug 125, and the plug 125 of the first portion 121 and the second portion 123 is at least partially inserted into the through hole 111a of the magnetic core 120, so that the positions of the magnetic core 120 and the frame 110 are fixed to each other. And the magnetic core 120 is respectively fastened by the framework 110 and the insulating sleeve 130 at the inner side and the outer side by matching with the limit of the insulating sleeve 130 on the magnetic core 120, so that the magnetic core 120, the framework 110 and the insulating sleeve 130 are fixed.

In the embodiment shown in fig. 4 and 5, the body 111 is a cylindrical sleeve structure to facilitate winding of the winding. Of course, the body 111 may have other shapes.

Referring to fig. 4 and 5, two ends of the body 111 may be provided with baffles 115, and the baffles 115 limit the primary winding and the secondary winding, so as to facilitate the tight winding of the primary winding and the secondary winding and avoid the safety problem caused by the collision of the cables due to looseness. The stretching portion 113 may be fixed to one of the baffles 115. The baffle 115 may be provided with a notch to facilitate the extraction of the output lines of the primary and secondary windings.

The stretching portion 113 is provided with a plurality of wire grooves 113a, the plurality of wire grooves 113a are arranged at intervals, a boss 1131 is formed between two adjacent wire grooves 113a, and the output wire of the primary winding penetrates out of the body 111, enters the wire grooves 113a, and is wound and fixed on the primary side pin 140. Thus, each primary side pin 140 corresponds to a group of output wires, and the output wires corresponding to each primary side pin 140 are spaced by the bosses 1131, and the pin-in positions of the output wires are distributed by the wire grooves 113a, so as to ensure a sufficient safety distance.

In one or more embodiments, at least one primary side pin 140 is offset and at least two adjacent wire slots 113a have different depths. Therefore, the distance between the output lines wound on the primary side pins 140 is increased, the space occupied by all the primary side pins 140 can be reduced, the volume of the transformer is finally reduced, and the area occupied by the transformer on a PCB is reduced. For example, the depth of the wire groove 113a gradually decreases from the middle to both sides of the stretching portion 113, and all the primary side pins 140 are arranged in an inner arc shape, rather than all the primary side pins 140 being arranged in a straight line, so that the same safety spacing of the output lines is achieved under the condition that the output lines corresponding to the primary side pins 140 are spatially misaligned, and the required width of the stretching portion 113 can be smaller, thereby achieving the purposes of reducing the volume of the transformer and reducing the occupied PCB area. By the offset of the primary side pins 140 and the difference in the depth of the wire grooves 113a, the problem of withstand voltage can be secured even at a pin pitch of 3.0 mm.

Referring to fig. 1, 2, 6 and 7, a first retraction 131 is disposed on the insulation sleeve 130 corresponding to the stretching portion 113, and at least one primary side stitch 140 passes through the first retraction 131. The first retracted position 131 is arranged to correspond to the inner arc arrangement of the primary side pins 140, so as to reduce the size of the transformer.

The primary side stitch 140 is disposed on a side of the stretching portion 113 away from the body 111, so that the output wire is wound after passing through the wire groove 113 a. One side of the stretching part 113 far away from the body 111 can be further provided with a coaming, and the coaming can limit the stitch wound on the primary side, so that the winding tightness of the output wire is further ensured.

The frame 110 may include a first end 110a and a second end 110b disposed opposite to each other, and the first end 110a and the second end 110b are respectively provided with a baffle 115. In the embodiment shown in fig. 4 and 5, the stretching portion 113 is fixed to the first end 110 a. The secondary pin 150 is disposed on a side of the insulating sleeve 130 close to the first end 110a to ensure a sufficient creepage distance between the secondary pin 150 and the magnetic core 120 and the bobbin 110.

For example, the insulating sheath 130 has a groove 130a on a side close to the first end 110a, and the output wire of the secondary winding is wound and fixed on the secondary pin 150 after passing through the groove 130 a.

In a specific embodiment, the outer sidewall of the insulating sleeve 130 may be provided with a second retracted position 133, and the secondary side pins 150 are disposed in the second retracted position 133, so that the volume of the transformer may be further reduced, and the area of the PCB board occupied by the transformer may be reduced.

The second retraction 133 is disposed at a position of the insulating sleeve 130 close to the first end 110a, and the secondary winding is wound around the second end 110b of the bobbin 110, so that when an output line of the secondary winding is wound and fixed on the secondary side pin 150, the output line firstly penetrates out of the insulating sleeve 130, and is insulated from the primary winding by the insulating sleeve 130, and meanwhile, the second retraction 133 and the position where the output line penetrates out can ensure a sufficient creepage distance. By introducing the output line of the secondary winding to the pin 150 at the secondary side, the problems of low positioning precision of a manual plug-in unit and time consumption of the plug-in unit caused by flying lines are solved, and the possibility of automatic plug-in unit is provided.

The outer side wall of the insulating sleeve 130 may be provided with a rib 135, the rib 135 is disposed corresponding to the secondary side pins 150, and at least one rib 135 is disposed between two adjacent secondary side pins 150, so as to achieve isolation of pins wound on different secondary side pins 150 by the rib 135, and to avoid contact between output lines.

The outer side wall of the insulating sleeve 130 may be further provided with a convex hull structure 137 corresponding to the convex ridge 135, so as to reinforce the insulating sleeve 130 at a position where the output line passes through, and increase the structural strength of the insulating sleeve 130.

Since the output line of the secondary winding is led out of the outer side wall of the insulating sleeve 130, compared with other transformers, the insulating sleeve 130 is not required to be arranged at the first end 110a of the framework 110, one surface of the insulating sleeve 130 can be omitted, and materials are saved.

Referring to fig. 3, 4 and 7, in one or more embodiments, the frame 110 is fixedly connected to the insulating sleeve 130. For example, the frame 110 may be provided with positioning posts 117, the insulating sleeve 130 may be provided with positioning holes 130b corresponding to the positioning posts 117, and the positioning posts 117 are inserted into the positioning holes 130b, so that the frame 110 is fixedly connected to the insulating sleeve 130. Therefore, the skeleton 110, the magnetic core 120 and the insulating sleeve 130 are fixed in a plurality of nesting modes. For example, the positioning posts 117 may be disposed on the baffle 115.

Above-mentioned transformer safety isolating device 10, through being provided with a plurality of wire grooves 113a on tensile portion 113, a plurality of wire grooves 113a set up at intervals each other, form boss 1131 between two adjacent wire grooves 113a, at least one primary side stitch 140 dislocation set, the degree of depth of adjacent wire groove 113a is different, dislocation distribution has been realized to the output line of primary winding, under the condition of the equal ann rule interval of realizing the output line, required tensile portion 113's width can be littleer, in order to reach the purpose that reduces the transformer volume, the reduction occupies the PCB area.

An embodiment of the present application further provides a transformer, and the transformer includes the transformer safety isolating device according to any one of the above embodiments.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A transformer safety isolation device is characterized by comprising a framework, a magnetic core, an insulating sleeve, a primary side pin and a secondary side pin, wherein the transformer safety isolation device is provided with a primary side and a secondary side which are oppositely arranged, the primary side and the secondary side are electrically insulated through the magnetic core, the magnetic core is accommodated and fixed in the insulating sleeve, the framework is arranged in the magnetic core and fixedly connected to the magnetic core, the primary side pin is arranged on the primary side and fixedly connected to the framework, and the secondary side pin is arranged on the secondary side and arranged outside the insulating sleeve;

2. The transformer safety isolating device according to claim 1, wherein two ends of the body are provided with a baffle plate, the baffle plates limit the primary winding and the secondary winding, and the stretching portion is fixed on one of the baffle plates.

3. The transformer safety isolating device according to claim 1, wherein the depth of the wire groove is gradually reduced from the middle to both sides of the stretching portion, and all the primary side stitches are arranged in an inner arc shape.

4. The transformer safety isolation device according to claim 3, wherein a first retracted position is provided on the insulation sleeve corresponding to the stretching portion, and at least one primary side stitch passes through the first retracted position.

5. The transformer safety isolation device of claim 1, wherein the bobbin comprises a first end and a second end which are oppositely arranged, the stretching portion is fixed at the first end, and the secondary side stitch is arranged on one side of the insulating sleeve close to the first end.

6. The transformer safety isolation device according to claim 5, wherein the outer side wall of the insulating sleeve is provided with a second retracted position, and the secondary side pin is arranged in the second retracted position;

7. The transformer safety isolating device according to claim 6, wherein a rib is disposed on an outer sidewall of the insulating sleeve, the rib is disposed corresponding to the secondary side pins, and at least one rib is disposed between two adjacent secondary side pins.

8. The transformer safety isolating device according to claim 7, wherein a convex hull structure is further provided on an outer side wall of the insulating sleeve corresponding to the convex rib.

9. The transformer safety isolation device according to claim 1, wherein the frame is provided with a positioning post, the insulating sleeve is provided with a positioning hole corresponding to the positioning post, and the positioning post is inserted into the positioning hole, so that the frame is fixedly connected to the insulating sleeve.

10. A transformer, characterized in that it comprises a transformer safety isolating device according to any one of claims 1 to 9.