Paper holder having a locking device

A paper holder having a locking device for preventing clipping fingers from incidental opening comprising:

• a back plate made of a resilient material,
• a pair of main bodies having longitudinal inner sides pivotally connected to each other and longitudinal outer sides embracing both of longitudinal outer sides of said back plate and rotatable at the embraced outer sides as pivotal portions and
• a plurality pairs of arcuate clipping fingers planted in a row at the upper surface of the said main bodies along the longitudinal direction thereof, in which the top end of each pair of the clipping fingers are capable of engaging or disengaging with each other by the vertical movement of the joining inner sides of said main bodies and
• a locking mechanism rotatably engaged at one end of said main bodies, wherein
• the locking mechanism comprises a vertical manipulation member and an actuation portion disposed at the back of said manipulation member, in which
• the actuation member has an upper member which is to be in contact with the upper surface of an engaging portion on both corners of the joining inner sides at the longitudinal end of said main bodies and a lower member which is to be contact with a lower surface of said engaging portion upon manipulation, and in which
• said upper member and said lower member extend horizontally opposing to each other to define a gap therebetween which is greater than the thickness of said engaging portion, whereby
• said upper member of the manipulation member is brought into contact with and immovably retains the upward movement of said main bodies in a vertically erected state of said manipulation member;
• and
• wherein retaining fingers protrude from the upper surface on the outer corners at the longitudinal end of the main bodies, while retaining ridges are formed along said edges at the back of the manipulation member such that the retaining fingers of said main bodies can be resiliently seized on the outsides thereof with said retaining ridges at the back of said manipulation member.