| 摘要 |
A holder includes a main-body disposed on a main circuit-board, a moving-arm, a fixed metal piece, and a moving metal piece. A support portion protrudes from a front side of the main-body and provides a supporting surface. The moving-arm includes a support block and an extension block. The support block is disposed to the front side, and an upper edge of the support block and the supporting surface are arranged in the same plane. The moving-arm moves to make the extension block protrude from the main-body. The fixed metal piece extends to a location between the support block and the front side. A part of the moving metal piece is located between the supporting block and the front side, while the other part extends to the extension block, so that at the moving metal piece is partially exposed corresponding to the front side.
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