This application claims priority to Taiwan Application Serial Number 101131955, filed Aug. 31, 2012, and Taiwan Application Serial Number 102104752, filed. Feb. 7, 2013, which are herein incorporated by reference.
1. Technical Field
Embodiments of the present invention relate to a combined structure of hollow bobbin and conductive sheet. More particularly, embodiments of the present invention relate to a combined structure of hollow bobbin and conductive sheet that is easy to assemble.
2. Description of Related Art
There are a wide variety of electronic devices used in the world today. A transformer is indispensable in such devices for adjusting voltage to a level required by the devices.
A transformer typically includes a bobbin, cores, a primary coil and a secondary coil. The primary coil and the secondary coil are wound on the bobbin. When providing an input voltage to the primary coil, electromagnetic induction will occur in the cores, and an output voltage will be generated in the secondary coil. The output voltage and the input voltage can be varied by controlling the differences between the turns of the primary coil and the secondary coil, thereby achieving the effect of voltage transformation.
The transformer generally employs conductive sheets as the primary coil. Blades are disposed on the bobbin and a winding groove is formed between each pair of the blades. The secondary coil can be wound in the winding grooves, and the blades separate the primary coil and the secondary coil.
Therefore, the blades must be placed between the primary coil and the secondary coil in a typical transformer, and because the blades are thick, the space available for winding the coil is consequently reduced. Moreover, the typical transformer is not easy to be assembled.
A summary of certain embodiments disclosed herein is set forth below. It should be understood that these aspects are presented merely to provide the reader with a brief summary of these certain embodiments and that these aspects are not intended to limit the scope of this disclosure. Indeed, this disclosure may encompass a variety of aspects that may not be set forth below.
In one aspect of the present invention, a combined structure of hollow bobbin and conductive sheet for a transformer is provided. The combined structure includes a hollow bobbin and at least one conductive sheet. The hollow bobbin includes an outer surface and at least one positioning structure formed on the outer surface. The conductive sheet is fit on the outer surface of the hollow bobbin and includes a main body and at least one engaging structure. The main body has a hollow portion, making the main body to have an inner circumference. The engaging structure is formed on the inner circumference of the main body and is engaged with the positioning structure of the hollow bobbin. The transformer includes at least one winding disposed on the outer surface of the hollow bobbin and abutting against the conductive sheet.
In another aspect of the present invention, a hollow bobbin for a transformer is provided. The transformer has at least one conductive sheet and at least one winding. The conductive sheet includes a main body and at least one engaging structure. The main body has a hollow portion making the main body to have an inner circumference. The engaging structure is formed on the inner circumference of the main body. The hollow bobbin includes an outer surface and at least one positioning structure formed on the outer surface. The conductive sheet is fit on the outer surface of the hollow bobbin. The engaging structure of the conductive sheet is engaged with the positioning structure of the hollow bobbin. The winding is disposed on the outer surface of the hollow bobbin and abuts against the conductive sheet.
In yet another aspect of the present invention, a conductive sheet for a transformer is provided. The transformer has a hollow bobbin and at least one winding. The hollow bobbin includes an outer surface and at least one positioning structure formed on the outer surface. The conductive sheet includes a main body having a hollow portion and at least one engaging structure. The hollow portion makes the main body to have an inner circumference. The engaging structure is formed on the inner circumference of the main body. The conductive sheet is fit on the outer surface of the hollow bobbin. The engaging structure of the conductive sheet is engaged with the positioning structure of the hollow bobbin. The winding is disposed on the outer surface of the hollow bobbin and abuts against the conductive sheet.
It is to be understood that both the foregoing general description and the following detailed description are by examples, and are intended to provide further explanation of the invention as claimed.
The invention can be more fully understood by reading the following detailed description of the embodiment, with reference made to the accompanying drawings as follows:
Reference will now be made in detail to the present embodiments of the invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers are used in the drawings and the description to refer to the same or like parts.
Referring to
As shown in
Referring to
In this embodiment, the shape and the size of the engaging structure 210 can be substantially the same as which of the positioning structure 112, so that the engaging structure 210 can be tightly engaged with the positioning structure 112, thereby preventing the conductive sheets 200a˜200d from rotating on the hollow bobbin 100. For example, the engaging structure 210 can be, but is not limited to be, a protruded cone. The positioning structure 112 can be, but is not limited to be, a cone-shaped recess.
In this embodiment, the conductive sheets 200a˜200d are not limited to include only two engaging structures 210. In other words, the conductive sheets 200a˜200d may respectively include more than two engaging structures 210. More particularly, by increasing the amount of the engaging structures 210 and the positioning structures 112, the conductive sheets 200a˜200d can be fit on the hollow bobbin 100 more stably.
The diameter of the hollow portion 230 of each of the conductive sheets 200a˜200d is substantially equal to the outer diameter of the hollow bobbin 100, so as to enable the conductive sheets 200a˜200d to be fit on the hollow bobbin 100.
In this embodiment, each of the conductive sheets 200a˜200d is a double-layer structure formed by bending a single conductive piece. In other embodiments, each of the conductive sheets 200a˜200d may be formed by assembling a plurality of single-layer conductive pieces. In this embodiment, each of the conductive sheets 200a˜200d can be formed by, but is not limited to be formed by, copper.
The winding 300 (See
Because the winding 300 is the coil (See
In this embodiment, the winding 300 can be the primary side of the transformer 101, and the conductive sheets 200a˜200d can be the secondary side of the transformer 101, thereby achieving the effect of voltage transformation. In other embodiments, the winding can be a conductive sheet, such as the conductive sheet shown in this embodiment, and is not limited to be a coil.
As shown in
More particularly, as shown in
As shown in
During the assembling process of the transformer 101 the conductive sheets 200a˜200d can be assembled on the hollow bobbin 100 by sliding onto the hollow bobbin 100. Therefore, the assembling process of the transformer 101 can be easy, thereby reducing the time required for assembling, so as to facilitate the mass production of the transformer 101.
Referring to
As shown in
Referring to
During the process that the conductive sheets 200a˜200d are assembled on the hollow bobbin 100, the conductive sheets 200a˜200d are fit on the outer surface 111 of the hollow bobbin 100, and thereby slightly deform the hollow bobbin 100. Then, the conductive sheets 200a˜200d can be rotated, so that the engaging structure 210 can be engaged with the positioning structure 112 of the hollow bobbin 100, thereby securing the conductive sheets 200a˜200d on the hollow bobbin 100 and preventing free rotating of the conductive sheets 200a˜200d.
In this embodiment, the shape and the size of the engaging structure 210 can be substantially the same as which of the positioning structure 112, so that the engaging structure 210 can be tightly engaged with the positioning structure 112, thereby preventing the conductive sheets 200a˜200d from rotating on the hollow bobbin 100. For example, the engaging structure 210 can be, but is not limited to be, a protruded cone. The positioning structure 112 can be, but is not limited to be, a cone-shaped recess.
In this embodiment, the conductive sheets 200a˜200d are not limited to include only two engaging structures 210. In other words, the conductive sheets 200a˜200d may respectively include more than two engaging structures 210. More particularly, by increasing the amount of the engaging structures 210 and the positioning structures 112, the conductive sheets 200a˜200d can be fit on the hollow bobbin 100 more stably.
The diameter of the hollow portion 230 of each of the conductive sheets 200a˜200d is substantially equal to the outer diameter of the hollow bobbin 100, so as to enable the conductive sheets 200a˜200d to be fit on the hollow bobbin 100.
In this embodiment, each of the conductive sheets 200a˜200d is a double-layer structure formed by bending a single conductive piece. In other embodiments, each of the conductive sheets 200a˜200d may be formed by assembling a plurality of single-layer conductive pieces. In this embodiment, each of the conductive sheets 200a˜200d can be formed by, but is not limited to be formed by, copper. During the assembling process, at least one winding (not shown) can be disposed on the outer surface 111 of the hollow bobbin 100, and each winding abuts against the conductive sheet 200a, the conductive sheet 200b, the conductive sheet 200c, or the conductive sheet 200d.
When the winding is a coil, the space among the conductive sheet 200a, the conductive sheet 200b, the conductive sheet 200c and the conductive sheet 200d can be used as a winding groove, so that the winding can be directly wound in the space among the conductive sheet 200a, the conductive sheet 200b, the conductive sheet 200c and the conductive sheet 200d. Therefore, the hollow bobbin 100 of the transformer 102 does not require additional blades to form the winding groove, thereby enlarging the winding space or reducing the size of the transformer 102.
When the winding is the coil, one end of the winding is hung on the winding hanging part 250, and a partial wire of the winding crosses the winding crossing part 260. More particularly, in this embodiment, one wire end of the winding (the coil) can be hung on the wiring hanging part 250 of the conductive sheet 200a closest to the first core 410 of the core set 400 (See
In this embodiment, the winding can be the primary side of the transformer 102, and the conductive sheets 200a˜200d can be the secondary side of the transformer 102, thereby achieving the effect of voltage transformation. In other embodiments, the winding can be a conductive sheet, and is not limited to be a coil.
As shown in
More particularly, as shown in
As shown in
As shown in
In this embodiment, the first passages 110 surround the outer surface 111 of the hollow bobbin 100 and are parallel to each other. The second passages 115 are perpendicular to the first passages 110. The positioning structure 112 (the positioning groove) is located on the first passage 110. The engaging structures 210 (the bump) of the conductive sheets 200a˜200d move into the first passage 110 to engage with the positioning structure 112 (the positioning groove) after sliding into the second passage 115. In other embodiment, when the protrusions 121 of adjacent two of the protrusion sets 120 are disposed on the outer surface 111 of the hollow bobbin 100 in parallel, the protrusions 121 of adjacent two of the protrusion sets 120 can be arranged non-symmetrically.
In this embodiment, the positioning structure 112 (the positioning groove) is located between two adjacent protrusions 121 belonging to different protrusion sets 120. The engaging structures 210 (the bump) of the conductive sheets 200a˜200d slide in the first passage 110 and is engaged with the positioning structures 112 (the positioning grooves) after moving from the second passage 115 to the first passage 110. The engaging structures 210 can be engaged with the positioning structure 112 by rotating in the first passage 110 as described in the foregoing paragraphs of this embodiment. In other embodiments, the positioning structure 112 can be located on the boundary between the first passage 110 and the second passage 115.
In this embodiment, the elements the same as which in the second embodiment are labeled same reference numbers. As shown in
As shown in
Other elements, features or the assembling method thereof are the same as described in the second embodiment, and will not be repeatedly described herein.
During the assembling process of the transformer 103, the conductive sheets 200a˜200d can be assembled on the hollow bobbin 100 by sliding onto the hollow bobbin 100. Therefore, the assembling process of the transformer 103 can be easy, thereby reducing the time required for assembling, so as to facilitate to manufacture the transformer 103.
In accordance with the foregoing embodiments, embodiments of the present invention provide a method for assembling the combined structure of the hollow bobbin and the conductive sheets. The method is shown as the steps S1˜S4 in
In step S1, a hollow bobbin is provided. The hollow bobbin includes an outer surface and at least one positioning structure formed on the outer surface.
In step S2, at least one conductive sheet is fit on the outer surface of the hollow bobbin. The conductive sheet includes a main body and at least one engaging structure. The main body has a hollow portion making the main body to have an inner circumference. The engaging structure is formed on the inner circumference of the main body and is engaged with the positioning structure of the hollow bobbin.
In step S3, at least one winding is disposed on the outer surface and abut the conductive sheet.
Although the present invention has been described in considerable detail with reference to certain embodiments thereof, other embodiments are possible. Therefore, the spirit and scope of the appended claims should not be limited to the description of the embodiments contained herein.
It will be apparent to those skilled in the art that various modifications and variations can be made to the structure of the present invention without departing from the scope or spirit of the invention. In view of the foregoing, it is intended that the present invention cover modifications and variations of this invention provided they fall within the scope of the following claims.
Number | Date | Country | Kind |
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101131955 A | Aug 2012 | TW | national |
102104752 U | Feb 2013 | TW | national |
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5748064 | Smeenge et al. | May 1998 | A |
7567164 | Chin | Jul 2009 | B2 |
20070057757 | Chen et al. | Mar 2007 | A1 |
20080180205 | Tsai et al. | Jul 2008 | A1 |
20080284551 | Chen et al. | Nov 2008 | A1 |
Number | Date | Country | |
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20140062642 A1 | Mar 2014 | US |