| 摘要 |
PURPOSE:To prevent the occurrence of improper key operation feeling, an abnormal sound, foreign material ingress into a device, or the like, and improve external appearance by coupling the engaging section of a key arrangement member to the engaged section of an external member through the through-hole section of fan external base. CONSTITUTION:A positioning pin type engagement projection (engaging section) 11 is projected as integral part of the front side, the right and left sides and the center of a key arrangement member 2, and an external base 4 is provided with a through-hole 12 for allowing the penetration of the projection 11 in loose state. In addition, an engagement hole 13 is drilled through an external member 6 for the engagement of the projection 11 through the hole 12. As a result, the projection 11 of the member 2 passes through the hole 12 of the base 4, and is coupled to the hole 13 of the member 6 in assembled state, thereby enabling the relative position of a key 1 to be determined for the coupling hole 5 of the member 6. According to this construction, a gap between the surrounding of the key 1 and the hole 5 of the member 6 can be reduced to a minimum necessary, and good appearance can be obtained. Also, dust-tight quality can be improved. |
