Metal-free hair clip and producing method thereof

A metal-free hair clip comprising:

• two clip bodies which are substantially symmetric to each other and which are made of a first material with transparency, wherein each of the two clip bodies is formed from a plate-shaped blank of the first material, wherein each of the two clip bodies includes a central portion, wherein a pattern layer is provided at the central portion and has two opposite sides each of which is covered by a transparent layer, wherein each of the two clip bodies is bent to define an upper end having a pressing portion and a lower end having a claw portion bending inward, and wherein the upper end of each of the two clip bodies includes a through-hole;
• two pivotal blocks made of a second material tougher than the first material, wherein each of the two pivotal blocks includes a block portion and a pivotal portion disposed on an inner side of the block portion, wherein the pivotal portion of one of the two pivotal blocks is pivotably connected to the pivotal portion of another of the two pivotal blocks, wherein an outer side of each block portion includes a coupling portion opposite to the pivotal portion, wherein an outer surface of each block portion is securely connected to an upper end of one of the two clip bodies, and wherein the coupling portion is located in the through-hole of the one of the two clip bodies;
• and
• a coupling member made of a third material tougher than the first and second materials, wherein the coupling member is substantially C-shaped and includes two open end portions respectively extending through the through-holes of the two clip bodies and respectively coupled with the coupling portions of the two pivotal blocks, and wherein the coupling member provides the two clip bodies with a clamping force.