The present invention relates to a terminal structure of a substrate mounting type part such as a multifunction vibration actuator.
Currently, in fields of a substrate mounting type part mounted in a mobile communication apparatus or the like, as the result of downsizing all parts, resistance against oscillation of a terminal portion thereof due to the movement of a user is required.
With respect to such a requirement, as a mounting structure for preventing relative oscillation of an vibration actuator by a mounting member, there is a structure described in Japanese Patent No. 3251305 (hereinafter, referred to as Patent Document 1) for improving the reliability of the electrical connection of the vibration actuator to a mobile telephone body and facilitating the assembling thereof. In Patent Document 1, an elastic holder having a projection at a position facing a power supply terminal in addition to the above-described structure is formed so as to obtain effect that the life span of the terminal is prolonged by reducing friction between the terminal and a power supply land.
In addition, independent of Patent Document 1, as a terminal structure in which an elastic member having a projection is disposed at a position facing a power supply terminal and the elastic member simultaneously configures a mounting portion, there is a structure described in Japanese Patent No. 3187031 (hereinafter, referred to as Patent Document 2). In Patent Document 2, unlike Patent Document 1, by elastically supporting the power supply terminal, oscillation suppression effect that the oscillation of the power supply terminal is suppressed is added.
In addition to the above-described effects, in Patent Document 2, by adding the elastic member to the power supply terminal, it is possible to protect the power supply terminal from plastic deformation when impact is received when dropping.
However, in Patent Document 1, since the vibration actuator is mounted in a casing by the mounting member and the vibration actuator is fixed using the elastic member, the oscillation of the vibration actuator is attenuated.
In addition, in Patent Document 2, in addition to the problem of Patent Document 1, since the power supply terminal is inserted between the vibration actuator and the power supply land, the oscillation is attenuated in both the elastic member and the power supply terminal.
In addition, in Patent Document 2, since the power supply terminal is used as the oscillation suppression member, it is difficult to reduce the dimension thereof in a contact direction. As a result, the dimension of a mounted mobile communication apparatus is increased.
The present invention is contrived to solve the above-described problems. An object of the present invention is to provide a terminal structure capable of saving a space of an overall terminal portion and realizing stable connection without attenuating oscillation when an vibration actuator is driven.
In order to solve the above-described problems, a structure in which spring terminals are brought into contact with terminal base projections formed on the rear surface of the spring terminals when the spring terminals arranged on the same straight line in the same direction in parallel are brought into contact with a power supply land is used. By using such a structure, it is possible to distribute a load which is concentrated on a support of the spring terminals by the large displacement of the spring terminals when the projections are not formed and to enhance the durability of the spring terminals.
In addition, since a total of two spring structures including a spring structure using the projections as a fulcrum and a spring structure using the support as a fulcrum is applicable to the spring terminal, it is possible to improve the reliability of the overall spring terminal.
In addition, since the movable range of the spring terminal is limited by the projections, even if the plurality of spring terminals is formed so as to be close to each other, it is possible to prevent the contact between the terminals and to prevent the short circuit due to the contact between the terminals.
In addition, by adding the mounting structure using a locking it is possible to facilitate assembling and to absorb deformation due to the bending of the spring terminals.
Further, by forming a spherical surface in the contact portion of the terminal structure described above, the contact with the power supply land becomes a point contact, thereby obtaining good conductive characteristics.
Hereinafter, best embodiments of the present invention will be described with reference to
As shown in
In more detail, as shown in
In addition, as shown in
In addition, by forming projections D, it is possible to use a pressurization force due to a spring structure using a bending portion G as a fulcrum and a spring structure using the projections D using a fulcrum when mounting on the substrate and to enhance the durability of all the spring terminals.
By a structure in which the displacement of a spring terminal support is limited by the projections D, it is possible to distribute a load that is concentrated on the bending portions G of the spring terminals and to enhance the durability of the spring terminals 1. In addition, by forming the projections D on the terminal base, the movable range of the spring terminals 1 is limited so as to prevent the short circuit from occurring due to the contact between the terminals.
In addition, in the present embodiment, since a part is directly mounted on a mounting substrate, driving is realized without attenuating oscillation upon the occurrence of body sensible oscillation.
As described above, by the terminal structure described in the present embodiment, it is possible to downsize the terminal portion of the multifunction vibration actuator described in the present embodiment and to enhance the durability of the terminal portion.
It is therefore apparent that there has been provided, in accordance with the present invention, a power supply terminal structure and particularly a terminal structure of a substrate mounting type part such as a multifunction vibration actuator. While this invention has been described in conjunction with a preferred embodiment, it is evident that many alternatives, modifications, and variations would be or are apparent to those of ordinary skill in the application arts. Accordingly, the disclosure is intended to embrace all such alternatives, modifications, equivalents any variations that are within the spirit and scope of this invention.
Number | Date | Country | Kind |
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2007-110302 | Apr 2007 | JP | national |
Filing Document | Filing Date | Country | Kind | 371c Date |
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PCT/JP2008/057565 | 4/18/2008 | WO | 00 | 11/18/2009 |
Publishing Document | Publishing Date | Country | Kind |
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WO2008/130024 | 10/30/2008 | WO | A |
Number | Name | Date | Kind |
---|---|---|---|
5655913 | Castaneda et al. | Aug 1997 | A |
5980323 | Bricaud et al. | Nov 1999 | A |
6464512 | Morita | Oct 2002 | B2 |
7220152 | Jeong | May 2007 | B2 |
7306494 | Soh | Dec 2007 | B2 |
7341485 | Polnyi | Mar 2008 | B2 |
7938698 | Yu | May 2011 | B1 |
20050112959 | Lai | May 2005 | A1 |
Number | Date | Country |
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3187031 | Jul 2001 | JP |
3251305 | Jan 2002 | JP |
Number | Date | Country | |
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20100093220 A1 | Apr 2010 | US |