JPH056645Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a terminal structure of a coil device suitable for mounting on a circuit board using an automatic machine.

[Prior art and its problems]

FIG. 8 is a plan view of a conventional high-frequency coil, in which the terminal 2 protrudes outward from the side surface 3 of the high-frequency coil 1. Such a high-frequency coil 1, which has been significantly miniaturized, is mounted on a circuit board using an automatic machine, but the horizontal alignment is carried out by the alignment part 4 of the machine coming into contact with the side of the high-frequency coil 1. move in the direction. Therefore, on the side where terminal 2 is located,
Since the part 4 for aligning the machine directly contacts the terminal as shown by the dashed line, force is applied to the terminal 2, and the terminal 2, which is a metal piece with a length of 2 to 3 mm, is easily bent and deformed. Then, an accident occurs in which the lead of the coil connected to the terminal 2 is broken or the position of the terminal 2 becomes uneven, making it impossible to accurately align the coil 1.

〔the purpose〕

The purpose of this invention is to make the planar shape approximately octagonal, position the terminal on the second side that is inside the extension of the first side in four orthogonal directions, and prevent the terminal from exiting the extension of the first side. By doing so, it is an object of the present invention to provide a coil device in which the positioning part of the machine hardly comes into contact with the terminal.

[Technical means to solve problems]

The coil device of the present invention has four coils whose planar shapes are orthogonal.
a flat first side facing in the direction;
The terminal is approximately octagonal in shape, consisting of a second side that continues so as not to intersect at right angles, and the position of the terminal is within the plane of the quadrangle formed by making the extended lines of the first side perpendicular to each other. It is characterized by being located on the lower side of the .

〔Example〕

Taking a high-frequency coil as an example, a description will be given below with reference to FIGS. 1 to 3 showing an embodiment of the coil device of the present invention. Figure 1 is a perspective view of the high frequency coil.
FIG. 2 is an exploded perspective view, and FIG. 3 is a plan view.

1 to 3, 10 is a metal case, 12 is a synthetic resin base, and 13 is a base 12.
It is a ferrite core placed on the top surface and around which a coil 14 is wound.

The planar shapes of the case 10 and the base 12 are octagonal with almost the same size as shown in FIG. be. Reference numeral 16 denotes a recessed portion projecting inside the case 1, and this recessed portion 16 is locked onto the upper surface of the base 12, so that the case 10 does not move downward.

Now, the planar shape of this high frequency coil is exactly the same as the planar shape of the case 10.
The octagonal planar shape of the case 10 has a flat first side surface 1 facing in four orthogonal directions at its center.
7. Consisting of second side surfaces 18 that are continuous at four corners so as not to intersect the first side surface 17 at right angles, and the planar shape of the base 12 into which the case 10 is fitted is also the same as the first side surface 17.
There is a side surface 19 corresponding to the second side surface 18, and a side surface 20 corresponding to the second side surface 18. The first side 17 is the second side 1
8 in the horizontal direction, and each of the four sides has the same length. The terminal 11 projects horizontally from the side surface 20 of the base 12, and as shown in FIG. It is designed to prevent it from coming out. The side surface 19 of the base 12 is inside the first side surface 17 and the side surface 20 is inside the second side surface 18, and moreover, they are inside by almost the thickness of the case 10, so the size of the plane formed by the extension line 21 is the same as that of the side surface 17. It is not much different from the plane created by the extension line of 19.

In this way, the terminal 11 is located at a position where the four corners of the quadrangle formed by the extension line 21 of the first side surface 17 are cut out, and is located on the second side surface 18 inside the quadrangle. Therefore, even if the part that performs positioning of the automatic machine comes into contact with the side surface of the high-frequency coil from four directions, it will either mainly contact the first side surface 17 and have almost no contact with the terminal 12, or it will not come into contact with the terminal 12 at all. It is also possible to prevent force from being applied.

Note that both the first side surface 17 and the second side surface 18 are flat in the vertical and horizontal directions, but the terminal 1
The second side surface of 1 may be curved in the horizontal direction, that is, the cutout portions at the four corners of the quadrilateral may be curved. In addition, if both the first side surface and the second side surface are flat and have a regular octagonal shape, their positions can be exchanged by rotating them in a plane, but the second side surface with the terminal It is preferable that the length in the horizontal direction is shorter than that of the first side surface that is in contact with the part that performs alignment of the machine, so that there is a difference in length between the first side surface and the second side surface.

FIG. 4 shows another embodiment of the coil device of the present invention, and is a plan view of the high frequency coil.

The planar shape of the case 30 is an octagon like the case 10, but the planar shape of the base 31 inscribed with the dashed line is circular. The terminal 33 protrudes from the side surface of the base 31 at the second side surface 34 so as not to extend outside the quadrangular plane formed by the extension line 35 of the first side surface 32 of the case 30. In this embodiment, the shape of one of the four terminals 33 is enlarged to make it easier to understand the planar direction of the high-frequency coil. In this way, the shape of the base inside the case may be different from the planar shape of the case, as long as the outermost planar shape is octagonal.

FIG. 5 shows another embodiment of the coil device of the present invention, and is a perspective view of a high frequency coil.

In this high-frequency coil, the planar shape of the lower collar 42 of the core 41 around which the coil 40 is wound is octagonal, and there is no case. The lower tsuba 42 is the round upper tsuba 4
3, and the planar shape of the high frequency coil matches the planar shape of the lower flange 42.

The terminal 45 protrudes from the second side surface 44 of the lower collar 42, and the terminal 45 protrudes from the first side surface 4 in four orthogonal directions.
Do not go outside of the rectangular plane formed by orthogonally extending the extension lines of 6.

In this way, the high-frequency coil of the present invention is independent of the presence or absence of a case, but if there is no case, the planar shape of the lower flange must be octagonal. If the upper flange 43 is larger than the lower flange 42, it is possible to design the upper flange 43 without the terminal 45 to have an octagonal planar shape without worrying about the planar shape of the lower flange 42, but when it is attached to a circuit board. The posture of the high-frequency coil becomes unstable, making it impractical.

6 and 7 are a perspective view and a plan view showing still another embodiment of the coil device of the present invention.

6 and 7 illustrate a delay line consisting of a plurality of coils and other circuit elements such as a capacitor, and a coil device that constitutes an LC filter on the upper surface of the base 50. It is a metal case that can be enclosed. Case 51 is fixed to base 50 in the same way as case 10 of the first embodiment. The planar shape of the case 51 and the base 50 are both elongated octagons, but the planar shape of the outer case 51 is the planar shape of the coil device.

a first side surface 52A that is flat in four orthogonal directions;
There is a first side surface 52B, and two long first side surfaces 52A and two short first side surfaces 52B are opposed to each other. Then, at the four corners, the second side surface 53
The side surface 52A continues to the first side surface 52B.
The terminal 55 is connected to the base 50 corresponding to the second side surface 53.
protrudes horizontally from the side surface 54 of the first
It does not extend beyond the elongated rectangular plane formed by orthogonally extending the extension line 56 of the side surface 52A and the first side surface 52B.

As described above, the terminal structure of the present invention can be widely applied as a terminal structure of a coil device for surface connection using the coil in addition to a high-frequency coil.

In each of the embodiments, the terminal protrudes horizontally at the second side surface, but it may also be bent toward the bottom surface of the lower flange of the base or core. In that case, the length of the second side surface of the coil device may be shorter and the area smaller than that in the case where the second side surface protrudes in the horizontal direction. In addition to metal, the case may also be made of synthetic resin, ferrite, or ceramic. The method for fixing the case to the base does not need to be limited to the examples, as adhesive may be used.

Moreover, the second side surface may be formed from two or more side surfaces that are continuous in the horizontal direction. Furthermore, it may be a mold type coil device that is entirely sealed with resin.

〔effect〕

As described above, the coil device of the present invention has a structure in which the four corners of a so-called rectangular planar shape are cut out and the terminals are positioned at the four corners. The parts corresponding to the four corners are the second side, and the four sides that make up the quadrangle are the first side.
The second side is located inside the quadrangular plane formed by orthogonally extending the extension line of the first side,
The terminals also do not extend beyond the extension line. Therefore, by bringing the positioning part of the automatic machine into contact with the first side surface, it is possible to almost eliminate contact with the terminal, and even if contact occurs, no force is applied, so deformation of the terminal can be prevented. can. In addition, since the terminal is on the second side inside the quadrangle formed by the extension line of the first side, the planar shape of the coil device including the terminal can be made smaller regardless of whether the terminal is inside the quadrangle. There are advantages that can be achieved. Furthermore, when the terminals are made to protrude horizontally, the connection state of the terminals to the circuit board can be checked from above, which is convenient when inspecting the circuit board.

As described above, the coil device of the present invention has a structure suitable for mounting on a circuit board using an automatic machine, and is practical.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an embodiment of the coil device of the present invention, Fig. 2 is an exploded perspective view, Fig. 3 is a plan view, Fig. 4 is a plan view showing another embodiment, and Fig. 5 is an exploded perspective view. FIG. 6 is a perspective view of a coil device showing another embodiment, FIG. 7 is a plan view, and FIG. 8 is a plan view of a conventional high-frequency coil. DESCRIPTION OF SYMBOLS 10... Case, 11... Terminal, 12... Base, 17... First side surface, 18... Second side surface.

Claims (1)

[Scope of utility model registration request] The planar shape is approximately octagonal, consisting of a flat first side face facing in four orthogonal directions and a second side face not perpendicular to the first side face, and the terminal is located at the first side face. The terminal is located below the second side surface within a rectangular plane formed by extending the first side surface and orthogonal to each other, and is characterized in that the terminal does not protrude outside the plane of the rectangle. coil device.