Abstract: An optical system affixed to an electronic apparatus is provided, including a first optical module, a second optical module, and a third optical module. The first optical module is configured to adjust the moving direction of a first light from a first moving direction to a second moving direction, wherein the first moving direction is not parallel to the second moving direction. The second optical module is configured to receive the first light moving in the second moving direction. The first light reaches the third optical module via the first optical module and the second optical module in sequence. The third optical module includes a first photoelectric converter configured to transform the first light into a first image signal.

Abstract: A pinch-preventing unit for bed guardrail includes a guardrail, a bed frame, and an actuating unit. The actuating unit is provided with a gap cover, which is located at a lower edge of the guardrail to close a gap existed between the lower edge of the guardrail and a top of the bed frame when the guardrail is in a lifted position for use, so as to ensure the safety use of the guardrail.

Abstract: A pinch-preventing unit for bed guardrail includes a guardrail, a bed frame, and an actuating unit. The actuating unit is provided with a gap cover, which is located at a lower edge of the guardrail to close a gap existed between the lower edge of the guardrail and a top of the bed frame when the guardrail is in a lifted position for use, so as to ensure the safety use of the guardrail.

Abstract: A handrail means for a bed frame includes a handrail frame, a shield, a handrail fixing frame, and a swinging assembly. When the swinging assembly acts, the shield does not act yet so as to avoid from interfering with the swinging assembly. When the swinging assembly is oriented horizontally, the shield can be folded toward the inside of the handrail frame. When the swinging assembly achieves a predetermined point, the shield has completed its action. Therefore, during the action, the shield avoids the handrail means from contacting the ground, thereby smoothing the folding of the handrail means of the bed frame.

Abstract: A handrail means for a bed frame includes a handrail frame, a shield, a handrail fixing frame, and a swinging assembly. When the swinging assembly acts, the shield does not act yet so as to avoid from interfering with the swinging assembly. When the swinging assembly is oriented horizontally, the shield can be folded toward the inside of the handrail frame. When the swinging assembly achieves a predetermined point, the shield has completed its action. Therefore, during the action, the shield avoids the handrail means from contacting the ground, thereby smoothing the folding of the handrail means of the bed frame.