| 摘要 |
PURPOSE:To sense easily whether mounting is carried out or not by disposing a couple of magnets connected with a sensing device electrically on an insert mounting section, forming a circuit using a space between said magnets as a switch and mounting an insert on the mounting section. CONSTITUTION:When an insert 2 constituted of a magnet such as a steel plate or the like is mounted on an insert mounting section 22, the same is attracted by a couple of magnets to connect electrically magnets 31 and 32 through a space between by the insert 21. A circuit 41 including a sensing device 40 is closed by said arrangement to actuate the sensing device 40. In other words, the mounting of the insert 21 has been confirmed. Also, the insert 21 is of optional shape, and for the purpose of lightening the weight, bonding with foamed plastic or the like is carried out for strengthening. A proper number of through- holes 25 can be provided, too. The magnets 31 and 32 can be buried as a couple with optional way of facing on the mounting section in accordance with the shape of the insert 21, and further another magnet 33 may be buried, if necessary, for retaining the insert 21. |
