Pin structure of transformer bobbin

A pin structure of a transformer bobbin is provided. The transformer bobbin includes a winding part on which at least one winding is wound, and at least one wire outlet part arranged on a side of the winding part. The pin structure includes at least two accommodating slots arranged at the wire outlet part, and at least two conductive pins. Each of the accommodating slots has two first sections and a second section connected to the two first sections. Each of the conductive pins corresponds to one of the accommodating slots, and includes a connection section in the second section and two exposed sections connected to the connection section and extending to an outside of the winding part via the two first sections. One exposed section can perform socket welding, and the other one is bendable to define the end of the winding with the wire outlet part.

FIELD OF THE INVENTION

The present invention relates to a pin structure of a transformer bobbin, and particularly relates to a pin structure of a transformer bobbin, a conductive pin of which has two exposed sections.

BACKGROUND OF THE INVENTION

Nowadays, some practitioners also provide a conductive pin with a special structure for transformers for use in addition to traditional metal single-post pins. The foregoing conductive pin with the special structure is disclosed like Taiwan patents No. 301456, No. I343585, No. I501270, No. D171247, and No. D170621. Although the conductive pin disclosed in the previous patents simplifies the connection process for the tail end of a winding and the conductive pin through the special structure, in order to produce the aforementioned special structure, the conductive pin needs to be subjected to machining procedures such as stamping during the research and development, and wastes produced in the stamping process is a waste of cost for the practitioners.

SUMMARY OF THE INVENTION

The present invention is mainly directed to solve the problems caused by implementation of a conductive pin with a special structure.

In order to achieve the above objective, the present invention provides a pin structure of a transformer bobbin. The transformer bobbin is provided with a winding part which is bound with at least one winding thereon, and at least one wire outlet part arranged on one side of the winding part. The pin structure includesat least two accommodating slots arranged at a spacing from one another at the at least one wire outlet part, and at least two conductive pins. Each of the accommodating slots is formed with an entrance and two pin outlets located on a plane different from the entrance, and includes two first sections respectively communicated with the two pin outlets, and one second section connected to the two first sections. Each of the conductive pins corresponds to one of the accommodating slots, and is placed via the entrance of the accommodating slot. Each of the conductive pins has a connection section located in the second section and two exposed sections respectively connected to the connection section. The two exposed sections respectively extend to the two first sections and penetrate through the two pin outlets to an outside of the winding part. One of the two exposed sections can be provided for performing socket welding, and the other exposed section is bendable to define a tail end of the winding together with the wire outlet part.

In one embodiment, each of the accommodating slots is U-shaped, and each of the conductive pins is also U-shaped.

In one embodiment, one of the exposed sections for performing socket welding is longer than the other one of the exposed sections.

In one embodiment, a length of one of the exposed sections exposed from the at least one wire outlet part without socket welding is greater than a length of the second section.

In one embodiment, the transformer bobbin is provided with a cover at least covering the wire outlet part to limit the conductive pins.

According to the present invention, compared with the prior art, the present invention has the following characteristics: in the pin structure of the present invention, by means of cooperation between each of the accommodating slots and each of the conductive pins, even though each of the conductive pins does not need to have a complicated structure, the objectives of providing socket welding and limiting the tail end of the winding are achieved by the two exposed sections. During research and development, each of the conductive pins generates a specific wiring structure without stamping, so that production of wastes is avoided, and the production cost is reduced.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Detailed descriptions and technical contents of the present invention will be explained below in combination with accompanying drawings.

Referring toFIG.1toFIG.4, the present invention provides a pin structure10of a transformer bobbin. The transformer bobbin11includes a winding part111which is bound with at least one winding20thereon, and at least one wire outlet part112arranged on one side of the winding part111. Further, the transformer bobbin of the present invention is not limited to an upright type shown in the figures, but it can be of a horizontal type. The pin structure10of the present invention includes at least two accommodating slots12arranged at the at least one wire outlet part112, and at least two conductive pins13respectively corresponding to the at least two accommodating slots12. Further, the at least two accommodating slots12are formed in the at least one wire outlet part112at intervals, and each of the at least two accommodating slots12is formed with an entrance121and two pin outlets122located on a different plane from the entrance121. Further, the entrance121and the two pin outlets122are respectively located on two side surfaces of the wire outlet part112. If the entrance121is located on a side surface of the whole transformer bobbin11, the two pin outlets122can be located on a bottom surface of the whole transformer bobbin11. In addition, each of the at least two accommodating slots12includes two first sections123respectively communicated with the two pin outlets122, and a second section124connected to the two first sections123. Therefore, each of the at least two accommodating slots12of the present invention is U-shaped or similarly U-shaped. In addition, the two first sections123are not limited to the parallel disposing shown in the figures, and can be appropriately adjusted according to an implementation requirement. Further, the depth of each of the at least two accommodating slots12can be set according to the width of one of the at least two conductive pins13placed therein.

Referring toFIG.1,FIG.2,FIG.3andFIG.4, each of the at least two conductive pins13only corresponds to one of the accommodating slots12, and each of the at least two conductive pins13is placed via the entrance121of each of the at least two accommodating slots12. Further, each of the at least two conductive pins13is integrally formed by a metal plate. The structure of each of the at least two conductive pins13needs to match each of the at least two accommodating slots12, and is U-shaped or similarly U-shaped. Each of the at least two conductive pins13has a connection section131located in the second section124and two exposed sections132,133which are connected to the connection section131. The two exposed sections132,133respectively extend to the two first sections123and penetrate through the two pin outlets122to an outside of the winding part111. One of the two exposed sections132,133can perform socket welding, and the other one of the two exposed sections is bendable to define a tail end of the at least one winding20together with the at least one wire outlet part112. That is, each of the at least two conductive pins13of the present invention includes the two exposed sections132,133extending to the at least one wire outlet part112, but the two exposed sections132,133are different from conventional transformer pins, and are not used for coiling and outgoing of the tail end of the at least one winding20. In addition, each of the at least two conductive pins13of the present invention is implemented by a metal plate, so that it can bear a relatively high current. During research and development, each of the at least two conductive pins13generates a specific wiring structure without stamping, so that production of wastes is avoided, and the production cost is reduced.

Referring toFIG.3andFIG.4, in order to make one of the exposed sections132of each of the at least two conductive pins13definitely perform the socket welding, in one embodiment, the exposed section in the two exposed sections132,133used for the socket welding is longer than the other exposed section, as shown inFIG.3. In addition, in order to enhance the contact between each of the at least two conductive pins13and the tail end of the at least one winding20, a conduction relationship between each of the at least two conductive pins13and the at least one winding20and the restriction to the tail end of the at least one winding20are enhanced. In one embodiment, a length of one of the two exposed sections132,133exposed from the at least one wire outlet part112without socket welding is greater than a length of the second section124. Therefore, after being bent, the exposed section133can specifically restrain the tail end of the at least one winding20, and can be further in contact with the exposed section132to greatly enhance the conduction relationship between the at least two conductive pins13and the at least one winding20.

Referring toFIG.5cooperatively, in one embodiment, the transformer bobbin11is provided with at least one cover14covering the two wire outlet parts112to limit the at least two conductive pins13. Further, the at least one cover14can further cover the winding part111to achieve an isolation effect.