机械性能：
| 5-1.开关动作力 | 操作力应垂直按压按键，测量其值为标准值. | ||
| Operation fore | Operating force should be applied vertical of the | 250±70gf | |
| stem gradually when actuate the stem, the maximum | |||
| force should be measured. | |||
| 5-2.开关移动量 | 1.3±0.2 mm | ||
| Travel of switch | |||
| 5-3.回返力 | 开关被完全按压后，测量其释放到自由位置的力 | 30gf 以上 | |
| Return Force | A static load is applied to the switch to its full | 30gf Min | |
| stroke and measurements shall be made by releasing | |||
| the force to return to its free position. | |||
| 5-4.止动强度 | 垂直方向负荷3kgf力，停留3秒时间 | 机械没有损害的迹象 | |
| End stop strength | A static load of 3kgf is applied to vertical | there shallbe no sign of damage | |
| direction for a peried of 3 seconds. | mechanically |
