JP3121191U - Surface mount inductor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stop a metal piece that can be manufactured at a low cost and constitute a high-performance surface-mount inductor in a surface-mount inductor in which a metal piece to be a connection terminal is fixed to a bottom surface of a lower part of a drum core. Provide structure.
A metal piece serving as a connection terminal is provided with a spring mechanism and provided with a latching structure that can be attached to a lower collar portion of a drum core.
[Selection] Figure 2

Description

The present invention relates to a connection terminal structure of an inductor such as a choke coil that is surface-mounted on a circuit board of an electronic device such as a mobile phone, a digital camera, or a notebook personal computer. It relates to a stop structure.

  As a background art, a surface mount inductor disclosed in Japanese Patent No. 3411758 is known.

FIG. 1 shows a background art surface mount inductor. A metal piece 2 serving as a connection terminal is bonded and fixed to the bottom surface side of the lower collar portion 1b of the drum core, and the metal piece 2 is bent in the A and B directions and hung on the lower collar portion of the drum core by the tip claw portion 3. It has a structure to be stopped.
Japanese Patent No. 3411758

  However, if the metal piece is bent after the metal piece is bonded and fixed to the drum type core, the adhesive may be peeled off or the drum type core may be damaged. Moreover, since the bending process of a metal piece is also required, manufacturing cost will become expensive. Furthermore, the coil wound around the winding shaft 1c can be wound up to the outer diameter of the lower part of the drum core, but in the prior art, it is hung on the lower part of the drum core. Since there is a leading end claw portion, it cannot be wound up to the outer diameter of the lower collar portion of the drum core. Therefore, there has been a problem that the performance as an inductor is deteriorated.

  The present invention was devised in view of such problems, and reduced the production defects such as peeling of the adhesive and damage to the drum-type core as described above. It is an object of the present invention to provide a metal piece latching structure that can be configured.

  In order to solve the above-described problems, a surface mount inductor according to the present invention according to claim 1 includes a spring mechanism in a metal piece serving as a connection terminal, and does not require a process such as plastic deformation of the metal piece. A latching structure that can be attached to the lower collar is provided.

  According to the present invention, since the metal piece can be mounted on the lower collar portion of the drum core without requiring a process such as plastic deformation of the metal piece, manufacturing defects such as peeling of the adhesive and damage to the drum core are prevented. There is an advantage that a high-performance surface-mount inductor can be provided that can be reduced, manufactured at low cost.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following embodiments, members having the same functions as those described in the section of the related art are denoted by the same reference numerals, and description thereof is partially omitted.

  FIG. 2 is a view showing a spring mechanism of a metal piece that becomes a connection terminal of the surface mount inductor according to the present embodiment. When trying to insert the drum core into the metal piece 2 ′, the lower collar 1 b ′ comes into contact with the tip claw 3 ′ of the metal piece 2 ′, and the tip claw 3 ′ is pushed and expanded in the C direction. The metal piece 2 'is in an elastically deformed state, and when inserted until the bottom surface of the lower collar 1b' of the drum core contacts the metal piece 2 ', the metal piece 2' returns to its original shape from the elastically deformed state, and the metal piece The drum core is hooked to the lower flange 1b ′ of the 2 ′ tip claw 3 ′. Further, the optimum dimension of t of the tip claw part 3 ′ of the metal piece 2 ′ is 0.05 to 0.20 mm, so that sufficient latching strength can be obtained and the coil is wound around the winding shaft part 1c. It is possible to construct a high performance inductor without greatly affecting the maximum outer diameter of the coil.

  FIG. 3X is a plan view of the surface-mount inductor according to the present embodiment (the upper flange portion is omitted), and FIG. 3Y is a bottom view.

  Although the embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.

It is a figure which shows the surface mount inductor of background art. It is a figure which shows the spring mechanism of the metal piece used as the connection terminal of the surface mount inductor which concerns on one Embodiment of this invention. It is a figure which shows the surface-mount inductor which concerns on one Embodiment of this invention, (X) is a top view, (Y) is a bottom view.

Explanation of symbols

1a, 1a 'Upper collar part 1b, 1b' Lower collar part 1c, 1c 'Winding shaft part 2, 2' Metal piece 3, 3 'Tip claw part 4, 4' Bend terminal part A Bending direction B of projection part Bending direction of tip claw C Elastic deformation direction of metal piece

Claims (1)

A winding terminal portion of the drum core having flanges on both ends of the winding shaft portion is connected to the winding terminal portion to be soldered by winding the winding, an electrode portion to be mounted and soldered, and a lower portion of the drum core. A surface having a structure in which a metal piece having a protrusion bent at the periphery of the flange and having a claw hooked on the upper surface of the lower flange is directly bonded and fixed to the bottom surface of the lower flange of the drum core A surface-mounted inductor comprising a mounting mechanism that can be attached to a drum-type core without a step of plastic deformation of the metal piece, wherein the metal piece is provided with a spring mechanism.

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