| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent a contact part connecting a battery pack with a body part from being detached by vibration caused by dropping it and such, and to avoid a failure, such as an instantaneous interruption of power, by maintaining electric connection. <P>SOLUTION: A detachable battery pack 11 is provided on a lower case 2 of a housing constituting a body part. A body part side terminal 21 provided on the lower case 2 comprises a contact spring 32 having multiple types of contact points and parted into multiple ends to have different spring constants. When an external force is applied and the contact spring 32 vibrates, the electric connection consistently continues without all the contact points being detached, since the contact points have different resonance frequencies due to difference in the respective spring contacts and any of the contact points is attached to a electrode land 45 on a battery side terminal 20. <P>COPYRIGHT: (C)2012,JPO&INPIT |
