| 摘要 |
PROBLEM TO BE SOLVED: To solve a problem that there is an art joining a box base of a board box with a box cover using a sealing screw formed to make a screwdriver idly turn in the loosening direction, however, when the screwdriver is pushedly turned with a strong force, the sealing screw is often removed therefrom. SOLUTION: This sealing means for the board box is provided in the board box 1 formed by covering the box base 1a with the box cover 1b, and supplies the following requirements (1) to (4). (1) The box cover 1b is fixed using sealing screws 12. (2) A fixed ball holder 5 is projectingly provided to surround the outer circumference of the head part of the sealing screw 12. (3) The ball holder 5 has a dimension to store a Pachinko ball B therein and a fixed structure to prevent the pull-out of the Pachinko ball B once put therein. (4) The Pachinko ball B is fitted in the ball holder 5 and blocks the head of the sealing screw 12 with itself B. COPYRIGHT: (C)2007,JPO&INPIT
|
