JPH0513013U - Mounting drum core - Google Patents

Abstract

(57) [Summary] [Purpose] To realize a mounting drum core that is versatile and has a small mounting space. [Configuration] Plural pairs of electrodes 61, 62, 6 in the corners around the pedestal 4
A mounting drum core is constructed in which the processing terminals 51, 52, 53, 54 for winding are arranged on the upper surface of the pedestal 4 while providing 3, 64. [Effects] A compact and compact mounting drum core that is easy to assemble and versatile is provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a mounting drum core used for power conversion and electric signal conversion of a switching regulator or the like.

[0002]

[Prior Art]

 The structure of a conventional mounting drum core is shown in FIGS. 13 to 15.

In FIGS. 13 and 14, 1 is a main body of a drum core, 2 is a core, and 3 is a winding. Reference numeral 4 is a quadrangular plate base, 5 is a processing terminal, 6 is an electrode, and 7 is a printed wiring board. The processing terminal 5 and the electrode 6 both have a paired structure, and are composed of a pair of processing terminals 51, 51 and electrodes 61, 61. The pair of processing terminals 51, 51 are provided so as to project from one side surface of the pedestal 4. The electrodes 61, 61 are formed at the central corners of the opposing side surfaces of the pedestal 4. The processing terminal 5 and the electrode 6 are connected to the electrode 61 on the right side and the processing terminal 51 on the left side are connected to the electrode 61 on the right side inside the pedestal 4, for example. Then, the core 2 is attached to the printed wiring board 7 via the pedestal 4. FIG. 15 is an electrical connection diagram of the winding 3.

In the conventional mounting drum core having such a configuration, first, the core 2 is fixed to the pedestal 4. Next, both ends 31 of the winding 3 wound around the core 2 are soldered to the two processing terminals 51, 51 on the pedestal 4, respectively. After that, the electrodes 61, 61 are brought into contact with the conductive print on the printed wiring board 7 and soldered, and the pedestal 4 incorporating the core 2 is mounted on the printed wiring board 7.

[0005]

[Problems to be solved by the device]

 As described above, the conventional mounting drum core has a structure in which the processing terminals 51, 51 are projected from the side surface of the pedestal 4 and a pair of electrodes 61, 61 are provided at the corners of the opposite side surface. Therefore, the extraction positions of the terminals 31, 31 of the winding 3 and the mounting position of the pedestal 4 mounted on the printed wiring board 7 are specified. For this reason, the automatic positioning is convenient, but on the other hand, it is necessary to design the positioning in advance and there is a drawback that the versatility is lost. For example, there is an inconvenience that the main body 1 of the core 2 is used only for a single winding and cannot be used for a plurality of windings. Moreover, since the electrodes 6 are provided on the opposite side surfaces, the configuration of the conductive pattern of the printed wiring board 7 is also limited. Further, since the processing terminals 51, 51 of the winding 3 are projected to the side surface of the pedestal 4, there is a problem that the area occupied on the printed wiring board 7 becomes large, which hinders miniaturization.

The present invention has been made in order to solve the problems of such a conventional device, and is intended to realize a drum core for mounting which is versatile, small, and has a small mounting area. .

[0007]

[Means for Solving the Problems]

 The present invention uses a bobbin-shaped core made of laminated steel plates, a winding wound around the core, and an insulating material that mounts the core on the printed wiring board via electrodes on the bottom surface provided with winding processing terminals. In the mounting drum core including the pedestal, the mounting drum core includes a plurality of pairs of electrodes provided in the corners around the pedestal.

Further, the mounting drum core is formed by disposing the processing terminals for winding on the upper surface of the pedestal.

[0009]

[Action]

 First, the core is fixed to the pedestal, for example with an adhesive. Next, both ends of the winding wound around the core are respectively wound around a pair of processing terminals on the pedestal and connected by soldering. For multiple windings, each set of windings is terminated by another pair of processing terminals. Then, a pedestal incorporating the core is mounted on the printed wiring board by selecting an arbitrary set of a plurality of sets of electrodes provided in the periphery and contacting the corresponding conductive print on the printed wiring board.

[0010]

【Example】

 1 to 3 are configuration explanatory views of an embodiment of the present invention. FIG. 1 is a plan view, FIG. 2 is a side view of FIG. 1, and FIG. 3 is an electrical connection diagram of windings. 1 to 3, parts corresponding to those of the conventional device are denoted by the same reference numerals and overlapping description will be made. However, some of the parts may differ in structure and operation, and thus will be described in more detail.

In FIGS. 1 to 3, 1 is a drum core body, 2 is a core, and 3 is a winding. The core 2 is formed by laminating metal thin plates having high magnetic permeability into a bobbin shape, and primary and secondary windings 31 and 32 are wound around a small diameter cylindrical portion 23 surrounded by flanges 21 and 22 on both sides. ing. A connection diagram of the windings 31 and 32 is shown in FIG. 4 is a pedestal, and 51, 52 and 61, 62 are two pairs of processing terminals and electrodes, respectively. The pedestal 4 is made of a substantially square, plate-shaped insulating material such as synthetic resin, and processing terminals 51, 52 are formed to project at the center of the side surface of each side. The two pairs of electrodes 61 and 62 are each formed in an L-shaped cross section, and are provided at the corners of the bottom surface and side surfaces of the pedestal 4 corresponding to these electrodes 61 and 62.

Reference numeral 7 is a printed wiring board (see FIG. 10 below). A predetermined conductive pattern 70 is formed on the upper surface of the printed wiring board 7, and other electronic parts 71, 72, 73, 74 and the like are attached. The core 2 around which the two windings 31 and 32 are wound is soldered by bringing the electrodes 61 and 62 into contact with the conductive pattern 70 through the pedestal 4 and other electronic components 71, 72, 73. , 7 4 are mounted on the printed wiring board 7.

The mounting operation of the present invention having such a configuration will be described with reference to FIGS. 1 to 3 while referring to FIG. It is assumed that two sets of windings 31 and 32 are previously wound around the cylindrical portion 23 of the core 2 using a winding machine or the like, and both ends of each are drawn out. Next, the core 2 is fixed to the pedestal 4 by, for example, an adhesive, and the starting ends of the drawn windings 31 and 32 are wound around the processing terminals 51 and 52 on the left and bottom of FIG. Similarly, the ends of the windings 31 and 32 are wound around the processing terminals 51 and 52 on the right side and the upper side of the pedestal 4, respectively. Both ends of the two windings 31 and 32 are soldered to the front and rear and left and right processing terminals 51 and 52. After that, by selecting an arbitrary pair of a plurality of pairs of electrodes 61, 62 provided in the periphery and contacting the corresponding conductive print 70 on the printed wiring board 7, the pedestal 4 incorporating the core 2 is printed. It is mounted on the wiring board 7.

4 and 5 are a plan view and a side view of a second embodiment of the present invention. The difference between the configuration of the second embodiment shown in FIGS. 4 and 5 and the first embodiment is that the number of processing terminals and electrodes is increased. In the second embodiment, the square base 4 is provided with two treatment terminals 51, 52, 53, 54 and electrodes 61, 62, 63, 64 on each side, that is, a total of four pairs. Therefore, when the single winding 3 is wound around the core 2, one of the four pairs of processing terminals 51 to 54 is selected to process the terminal. Also, in the case of two windings, similarly, two pairs of processing terminals 51 to 54 at arbitrary positions are selected. Therefore, according to this embodiment, one or a plurality of pairs of the processing terminals 51 to 54 which are close to each other can be utilized, and a compact wiring work with short leads that can be easily led out can be performed.

FIGS. 6, 7 and 8, 9 and 11 and 12 are explanatory views of other embodiments of the present invention. 6 and 7, the base 4 is formed of an octagonal prism having a low height, and the processing terminals 51 to 54 and the electrodes 61 to 64 are provided on each of the eight side surfaces of the prism. Further, in the embodiment of FIGS. 8 and 9, two electrodes are provided on each side of the square base 4 as in the second embodiment. However, four pairs of processing terminals 51 to 54 are formed in a round bar shape, and these processing terminals 51 to 54 are planted on the upper surfaces of the four corners of the base 4. A perspective view of the mounting state of the embodiment shown in FIGS. 8 and 9 is shown in FIG. Further, in the fifth embodiment shown in FIGS. 11 and 12, the pedestal 4 has a cylindrical shape, and two pairs of processing terminals 51 and 52 and electrodes 61 and 62 are provided on the peripheral surface and the corners. According to all the embodiments of the present invention, the core 2 has a symmetrical shape with respect to a vertical line passing through the axial center of the core 2.・

In the above-mentioned embodiment, the case where the end of the winding is soldered to the plate-shaped or round-bar-shaped processing terminal has been described. It is not limited to the L-shaped cross section.

[0017]

[Effect of the device]

 As described above, according to the present invention, a bobbin-shaped core made of laminated steel sheets, a winding wound around the core, and a winding processing terminal are provided and the core is mounted on a printed wiring board through electrodes on the bottom surface. In the mounting drum core having a pedestal made of an insulating material, a plurality of pairs of electrodes are provided at the corners of the periphery of the pedestal.

In addition, a mounting drum core in which a plurality of pairs of processing terminals for windings are arranged on the upper surface of the pedestal is configured.

As a result, unlike the conventional device, the extraction position of the winding wire 3 and the mounting position of the pedestal 4 mounted on the printed wiring board 7 are not specified. Therefore, it is not necessary to pre-position and design the winding leads and processing terminals, and since it is versatile, it can be used as it is even if the number of windings increases. Further, since the electrode 6 is provided on the opposite side surface, the structure of the conductive pattern of the printed wiring board 7 is not limited, and if the processing terminal is provided on the upper surface of the pedestal as in the fourth embodiment, The area occupied on the printed wiring board is reduced, and it can be made compact.

Therefore, according to the present invention, it is possible to provide a compact and compact mounting drum core that is easy to assemble, versatile, and compact.

[Brief description of drawings]

FIG. 1 is a plan view of an embodiment of the present invention.

FIG. 2 is a side view of FIG.

FIG. 3 is an electrical connection diagram of the winding of FIG.

FIG. 4 is a plan view of a second embodiment of the present invention.

FIG. 5 is a side view of FIG.

FIG. 6 is a plan view of a third embodiment of the present invention.

FIG. 7 is a side view of FIG.

FIG. 8 is a perspective view of a fourth embodiment of the present invention.

9 is a side view of FIG.

FIG. 10 is a perspective view showing a mounted state of a fourth embodiment of the present invention.

FIG. 11 is a plan view of a fifth embodiment of the present invention.

FIG. 12 is a side view of FIG. 9.

FIG. 13 is a perspective view of a conventional mounting drum core.

14 is an explanatory side view of FIG.

FIG. 15 is an electrical connection diagram of the winding of FIG.

[Explanation of symbols]

 1 drum core body, 2 cores, 3,31,32 windings, 4 pedestals, 5,51,52,53,54 processing terminals, 6,61,62,63,64 electrodes, 7 printed wiring boards, 21 and 22 Flange, 23 cylindrical part, 70 conductive pattern, 71,72,73,74 electronic parts.

Claims (2)

[Scope of utility model registration request] 1. A bobbin-shaped core made of laminated steel sheets, a winding wound around the core, and processing terminals for the winding are provided to mount the core on a printed wiring board via electrodes on the bottom surface. A mounting drum core provided with a pedestal made of an insulating material, wherein a plurality of pairs of electrodes are provided at corners around the pedestal. 2. The mounting drum core according to claim 1, wherein a processing terminal for winding is provided on an upper surface of the pedestal.