JPH0576020U - Bobbin for inductor - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] To provide a bobbin for an inductor that can be easily formed by resin molding and can surely form a core. [Structure] Collar portions 3 are provided at both ends of a winding core 1, and a terminal block 4 having a flat surface 4A is arranged on the bottom surface of the collar portion 3, and
A pair of parallel pieces 5 protruding from the upper side of the collar portion 3 to the intermediate portion are arranged so as to be orthogonal to the collar portion outer surface 3A. When the core is mounted laterally, the lower end 5A of the parallel piece 5 and the flat surface 4
When the core is regulated by A and the core is mounted vertically,
It is regulated by a pair of parallel pieces 5. Only by forming the pair of parallel pieces 5, the core 8 can be reliably regulated in the vertical and horizontal directions.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an inductor bobbin in which a collar portion is formed at both ends of a cylindrical winding core having a core insertion hole.

[0002]

[Prior Art]

 The inductor bobbin is used when assembling an inductor by winding a coil and inserting a core in the coil. Then, bobbins of various structures are prepared according to the application of the inductor. For example, in the case of inductors for which higher packaging density is desired, horizontal space must be saved, so bobbins with a structure in which the core can be mounted vertically are prepared, while applications where space in the vertical direction is limited. In the case of this inductor, a bobbin having a structure in which the core can be mounted laterally is prepared.

As a conventional inductor bobbin configured such that the core can be mounted vertically or horizontally, the structure shown in FIGS. 5 and 6 is disclosed in Japanese Utility Model Laid-Open No. 59-17792. Has been done. The bobbin has grooves 33 and 34 formed so as to intersect with each other at flange portions 32 provided at both ends of the cylindrical winding core 31. When it is desired to mount the core 35 in the lateral direction X, for example, as shown in FIG. 6, a U-shaped core arranged by utilizing the groove 34 in an I-shaped core 35A inserted in the cylinder of the winding core 31. Mount 35B by butting the end faces against each other. 36 is a coil wound around the core 31 and 37 is a pin terminal.

On the other hand, when it is desired to mount the core 35 in the vertical direction Y, the U-shaped core 35 B is arranged by utilizing the groove 33 in the direction orthogonal to FIG.

Further, as another conventional example, a structure as shown in FIGS. 7 and 8 is disclosed in Japanese Utility Model Publication No. 3-38818. In this bobbin, a flange 43 for mounting having a flat surface is formed in the lower part of a collar portion 42 provided at both ends of a tubular winding core 41, and a pair of first flanges parallel to the flat surface of the flange 43. The movement regulation wall 44 and a pair of second movement regulation walls 45 are formed so as to be orthogonal to the movement regulation wall 44. When the core 46 is to be mounted in the lateral direction X, for example, as shown in FIG. 8, a pair of U-shaped cores 46A butted against each other are provided on the first floating regulation wall 44 and the flat surface of the mounting flange 43. Therefore, it is regulated and mounted. One abutting portion of the pair of U-shaped cores 46A is arranged in the cylinder of the winding core 41.

On the other hand, when it is desired to mount the core 46 in the vertical direction Y, the pair of U-shaped cores 46 A are restricted by the second floating restriction wall 45 and are mounted. Reference numeral 47 is a coil wound around the winding core 41, and 48 is a pin terminal. Here, the tubular core and the flanges are integrally formed by resin molding.

[0007]

[Problems to be solved by the device]

 However, the conventional inductor bobbins have the following problems. First, in the former structure, since the core 35 is regulated by the grooves 33 and 34, a sufficient regulation effect cannot be obtained. Therefore, the former structure is applied to applications involving vibration, such as automobile parts such as electrical components. Then, the core 35 is easily displaced. As a result, the reliability of the parts is reduced. Next, in the latter structure, since the two types of the first and second types of the movement restricting walls 44 and 45 must be formed, the die used for resin molding becomes complicated, which results in cost increase. Further, it becomes difficult to smoothly mold the bent portion at the boundary between the first and second restriction walls 44 and 45, and for example, burrs are generated at the boundary between the restriction walls 44 and 45 to regulate the core 35. In some cases, it may be an obstacle.

The present invention has been made to solve the above problems, and an object thereof is to provide a bobbin for an inductor that can surely regulate the core and can be molded while avoiding cost increase. ..

[0009]

[Means for Solving the Problems]

 In order to achieve the above object, according to the present invention, a flange portion is formed at both ends of a cylindrical winding core having a core insertion hole, and a terminal block protruding outward from the outer surface of the flange portion is formed on the bottom surface of the flange portion. In the bobbin for an inductor as described above, a pair of parallel pieces protruding from a direction above the outer surface of the flange portion to an intermediate portion in a direction orthogonal to the outer surface of the flange portion and maintaining a predetermined interval are provided. Is.

[0010]

[Action]

 According to the configuration of the present invention as set forth in claim 1, it is only necessary to provide a pair of parallel pieces that project from the outer surface of the collar portion to the intermediate portion in a direction orthogonal to the outer surface of the collar portion and keep a predetermined interval. The core can be mounted while being restricted in the horizontal and vertical directions.

According to the configuration of the present invention as set forth in claim 2, by making the interval between the pair of parallel pieces correspond to the width of the core insertion hole, it is possible to surely regulate especially when the core is mounted in the vertical direction. ..

According to the configuration of the present invention as set forth in claim 3, by positioning the lower ends of the pair of parallel pieces at the upper ends of the core insertion holes, it is possible to reliably regulate the core, particularly when it is mounted in the lateral direction. You can

[0013]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing an embodiment of an inductor bobbin of the present invention. A flange 3 is formed at both ends of a cylindrical winding core 1 having a core insertion hole 1A, and a bottom surface of the flange 3 is shown. A terminal block 4 having a flat surface 4A protruding outward from the outer surface 3A of the collar portion is formed on the terminal. A pair of parallel pieces 5 are provided from above the collar portion outer surface 3A to the middle portion so as to project in a direction orthogonal to the collar portion outer surface 3A and maintain a predetermined interval. As shown in FIG. 2 which is a side view viewed from the X direction (left side direction) of FIG. 1, the distance D between the pair of parallel pieces 5 is provided so as to correspond to the width W of the core insertion hole 1A, and the pair of parallel pieces 5 is further arranged. The lower end 5A of the parallel piece 5 is provided so as to be located at the upper end 1a of the core insertion hole 1A. These settings are made in consideration of the reliable regulation when the core is mounted horizontally or vertically as described later.

Another collar portion 2 is formed between the collar portions 3 at both ends of the winding core 1, and a coil 6 is wound around the winding core 1 between each collar portion 3 and the collar portion 2. .. The end of the coil 6 is electrically connected to the lead 7 at a position not shown. Here, the winding core 1, the collar portions 2, 3, the terminal block 4 and the parallel piece 5 are integrally formed by resin molding.

Next, a method of mounting a core using the inductor bobbin of this embodiment will be described. FIG. 3 shows an example of mounting the core 8 in the lateral direction X. In a state where the coil 6 is wound in advance, for example, a pair of U-shaped cross-section core pieces 8A is used, and each core piece 8A is regulated by the flat surface 4A of the terminal block 4 and the lower end 5A of the one parallel piece 5. Then, one end of each core piece 8A is inserted into the core insertion hole 1A of the winding core 1, and the other ends are butted against each other outside the coil 6 to form the core 8.

According to such a structure, the core 8 is regulated in a state of being sandwiched between the flat surface 4A of the terminal block 4 and the lower end 5A of the one parallel piece 5, so that the core 8 can be regulated reliably.

Next, FIG. 4 shows an example of mounting the core 8 in the vertical direction Y. In this case, with the pair of parallel pieces 5 preliminarily restricting each core piece 8A, one end of each core piece 8A is inserted into the core insertion hole 1A of the winding core 1 and the other end is formed of the coil 6. The cores 8 are formed by abutting each other on the outside.

According to such a structure, the core 8 is regulated in a state of being sandwiched between the pair of parallel pieces 5, so that the core 8 can be regulated reliably as in the case of the lateral regulation.

As described above, according to the present embodiment, the core 8 is combined with the flat surface 4A of the terminal block 4 only by forming the pair of parallel pieces 5 on the flange portions 3 at both ends of the winding core 1 to form the core 8 vertically and horizontally. It is possible to securely regulate in one direction. Thus, when the bobbin is resin-molded, the shape of the mold can be simplified, and the cost can be avoided. Further, since only a pair of parallel pieces 5 are formed, there is no bent portion as in the conventional case when performing resin molding, so that the parallel pieces can be molded with high accuracy, and the core is regulated. If you do it will not cause any problems.

The shape of the core 8 is shown as an example, and any shape can be used as required. Further, a plurality of collar portions 2 other than the end faces may be provided depending on the purpose.

[0022]

[Effect of the device]

 As described above, according to the present invention, since only a pair of parallel pieces are formed on the flange portions at both ends of the winding core to regulate the longitudinal and lateral directions of the core, resin molding becomes easy. Stalls can be avoided and the core can be reliably regulated.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of an inductor bobbin of the present invention.

FIG. 2 is a left side view showing an embodiment of the inductor bobbin of the present invention.

FIG. 3 is a perspective view showing an example in which a core is laterally attached to a bobbin of this embodiment.

FIG. 4 is a perspective view showing an example in which a core is vertically mounted on a bobbin of this embodiment.

FIG. 5 is a perspective view showing a conventional example.

6 is a perspective view showing an example in which a core is laterally mounted according to the conventional example of FIG.

FIG. 7 is a perspective view showing another conventional example.

FIG. 8 is a perspective view showing an example in which a core is laterally mounted according to the conventional example of FIG.

[Explanation of symbols]

 1 Core 1A Core insertion hole 1a Upper end of core insertion hole 2,3 Collar part 3A Collar outer surface 4 Terminal block 4A Flat surface 5 Parallel piece 5A Lower end of parallel piece

Claims (3)

[Scope of utility model registration request] 1. A bobbin for an inductor comprising a tubular winding core having a core insertion hole, flanges formed at both ends thereof, and a terminal block protruding outward from an outer surface of the flange at a bottom surface of the flange. A bobbin for an inductor, comprising a pair of parallel pieces projecting from a direction above the outer surface of the collar portion to a middle portion in a direction orthogonal to the outer surface of the collar portion and keeping a predetermined interval. 2. The inductor bobbin according to claim 1, wherein an interval between the pair of parallel pieces corresponds to a width of the core insertion hole. 3. The bobbin for an inductor according to claim 1, wherein lower ends of the pair of parallel pieces are located at upper ends of the core insertion holes.