Patent ID: 7712196

Claim:
A belt lock, comprising: a base; and an attachment to be detachably attached to the base, the attachment having a belt attaching section for attaching a belt, wherein: the base includes a socket and a plug that is disengageable from the socket, the plug includes a base section and an engaging section that projects from the base section and is inserted in and engaged with the socket, the base section includes a rail formed substantially in parallel to a direction in which the plug is inserted into the socket, the attachment includes: a groove to be slidably engaged with the rail, the rail is provided with a lock section and the groove is provided with a to-be-locked section to be engaged with the lock section, the rail includes: a root section continuously formed from the base; and a tip end section formed on a tip end side of the root section, the tip end section having a width larger than that of the root section, a width of the groove on a depth side is larger than that on an open side, the lock section is formed as a recess on an outer surface on a tip end side of the rail, and the to-be-locked section is formed as a protrusion to be engaged with the recess.