Abstract: A marking device for golf balls comprises a seat, an arch-shaped retainer, and a bottom plate. The seat defines a central recess and defines a bottom opening that communicates with the central recess. The seat is provided with an anti-slip pad within the central recess. Also, the seat is provided with upper positioning means and lower positioning means. The arch-shaped retainer is provided with retainer positioning means corresponding to the upper positioning means of the seat. The bottom plate is provided with plate positioning means corresponding to the lower positioning means of the seat. Therefore, the arch-shaped retainer and the bottom plate can be properly positioned on the seat. Furthermore, the arch-shaped retainer defines a central slit and the bottom plate defines a plurality of hollowed-out symbols. As such, the marking device can mark a line or symbol on a golf ball conveniently.

Abstract: A marking device for golf balls comprises a seat, an arch-shaped retainer, and a bottom plate. The seat defines a central recess and defines a bottom opening that communicates with the central recess. The seat is provided with an anti-slip pad within the central recess. Also, the seat is provided with upper positioning means and lower positioning means. The arch-shaped retainer is provided with retainer positioning means corresponding to the upper positioning means of the seat. The bottom plate is provided with plate positioning means corresponding to the lower positioning means of the seat. Therefore, the arch-shaped retainer and the bottom plate can be properly positioned on the seat. Furthermore, the arch-shaped retainer defines a central slit and the bottom plate defines a plurality of hollowed-out symbols. As such, the marking device can mark a line or symbol on a golf ball conveniently.

Abstract: A portable golf ball retaining plate includes a plate body provided with multiple grooves, wherein two opposite adjusting portions are arranged at upper side of each of the grooves, wherein the opposite adjusting portion at adjacent ones of the grooves are alternatingly arranged longitudinally and transversely. Thereby, the grooves can expand for receiving golf balls. When the golf ball is being retained in one of the grooves, the corresponding adjusting portions expand first and then contract such that the golf ball is retained. When the golf ball is being taken out, the corresponding adjusting portions first expand to the surrounding space and then contract to the original state.

Abstract: A portable golf-ball retaining plate includes a retaining plate provided with multiple grooves, wherein two opposite adjusting portions are arranged at an upper side of each of the grooves, wherein the opposite adjusting portions at adjacent ones of the grooves are alternatingly arranged longitudinally and transversely. Thereby, the grooves can expand for receiving golf balls. When the golf ball is being retained in one of the grooves, the corresponding adjusting portions expand first and then contract such that the golf ball is retained. When the golf ball is being taken, the corresponding adjusting portions first expand to the surrounding space and then contract to the original state.

Abstract: A fastening module (1) for a printed circuit board (10) of a portable electronic device includes the printed circuit board and a casing (20). The casing includes at least one supporting plate (23, 25) and at least one clamp (22). The supporting plate and the clamp engage with the printed circuit board, thus fixing the printed circuit board in the casing.