Battery pack and electronic equipment using the same

1. A battery pack which is used in a status being mounted on electronic equipment, a battery being built in a case and an output terminal electrically connected to the battery, the output terminal being mounted in such a manner as to be directed towards the outside of said case, wherein

said case comprises a main body having an approximately rectangular box shape with said battery built therein, and an output section having said output terminal formed on one plane of said main body,

said main body comprises:

a mount reference plane of the case for the electronic equipment;

an opposing surface opposing the mount reference plane;

a pair of first side surfaces respectively opposing each other and respectively substantially perpendicular to the mount reference plane and the opposing surface; and

a pair of second side surfaces respectively opposing each other and respectively substantially perpendicular to the mount reference plane and the opposing surface,

wherein said opposing surface is gradually curved from at least one surface of said pair of first side surfaces, in a direction to deviate from said mount reference plane as said opposing surface reaches a central portion between the pair of first side surfaces,

wherein said output section is formed in a projecting manner on a surface of one of said pair of second side surfaces of said main body in a position deviated towards one corner formed by said first side surfaces adjoining the second side surfaces and in a position spaced apart into a direction orthogonal to a virtual plane including said mount reference plane,

wherein an engagement for engaging said electronic equipment is formed on one surface where said output section is formed, of said pair of second side surfaces, and in the central portion between said pair of first side surfaces, and

on said one surface where said output section is formed, of said pair of second side surfaces, in the central portion between said pair of first side surfaces, and on the verge of said opposing surface, an ejection-purpose fingerhold which projects from the second side surfaces and aligned with said output section formed in projecting manner on the second side surfaces is provided.

2. A battery pack according to claim 1 , wherein

slit grooves are formed on the side of said virtual plane of said output section,

said output terminal is provided within said slit grooves, and

when said battery pack is stored in a battery pack storing space of said electronic equipment, a terminal of the electronic equipment projected in the battery pack storing space proceeds into said slit grooves of said output section to connect to said output terminal.

3. A battery pack according to claim 1 , wherein

engagements to be engaged with said electronic equipment are provided on another surface where said output section is not formed, of said pair of second side surfaces, and at positions respectively on the both sides of a virtual axis which passes through the center of said ejection-purpose fingerhold to the second side surfaces.

4. A battery pack according to claim 2 , wherein

engagements to be engaged with said electronic equipment are provided respectively on said another surface where said output section is not formed, of said pair of second side surfaces, and at positions on the both sides of a virtual axis which passes through the center of said ejection-purpose fingerhold to the second side surfaces.

5. A battery pack according to claim 3 , wherein

said engagement provided on said another surface where said output section is not formed, of said pair of second side surfaces, is a first engagement,

said engagement provided on said one surface where said output section is formed, of said second side surfaces, is a second engagement, and

said first engagement is formed by an engagement projection which projects from said second side surfaces and has a locking surface approximately parallel to said mount reference plane, and

said second engagement is formed by an engagement projection which projects from said second surfaces and has a locking surface approximately parallel to said mount reference plane together with an inclined plane gradually approaching the case outer surface along the direction from a trip end of the locking surface to said mount reference plane.

6. A battery pack according to claim 4 , wherein

said engagement provided on said another surface where said output section is not formed, of said pair of second side surfaces, is a first engagement,

said engagement provided on said one surface where said output section is formed, of said second side surfaces, is a second engagement, and

said first engagement is formed by an engagement projection which projects from said second side surfaces and has a locking surface approximately parallel to said mount reference plane, and

said second engagement is formed by an engagement projection which projects from said second surfaces and has a locking surface approximately parallel to said mount reference plane together with an inclined plane gradually approaching the case outer surface along the direction from a trip end of the locking surface to said mount reference plane.

7. Electronic equipment comprising a battery pack storage which stores the battery pack according to claim 1 .

8. Electronic equipment comprising a battery pack storage which stores the battery pack according to claim 2 .

9. Electronic equipment comprising a battery pack storage which stores the battery pack according to claim 3 .

10. Electronic equipment comprising a battery pack storage which stores the battery pack according to claim 4 .

11. Electronic equipment comprising a battery pack storage which stores the battery pack according to claim 5 .

12. Electronic equipment comprising a battery pack storage which stores the battery pack according to claim 6 .