Abstract: A speaker device is installed in an electronic device, and the speaker device includes a speaker module and a first loop tube. The speaker module has a casing and a speaker unit. The casing has a main sound cavity and a sound outlet. The speaker unit is disposed in the casing, and the speaker unit includes a diaphragm, which is communicated with the sound outlet. The first loop tube has a first end and a second end, and the first end is connected to the casing. The length of the first loop tube is at least 10 mm, and the inner diameter of the first loop tube is at least 2 mm.

Abstract: A mechanism for saving space in a desktop computer allows the number of groove holes of a back plate of a rack is less than the number of interface card slots of a motherboard to cause at least one of the interface card slots to be left unused so as to shorten the height of the back plate and further to shorten the height of the rack. Furthermore, a design allowing the rear end of a power support to be extended out of the back plate to the outside with a small distance by moving the back plate toward the front end of the rack further to shorten the length of the rack to allow a desktop computer to be lighter and handier.

Abstract: A mechanism for saving space in a desktop computer allows the number of groove holes of a back plate of a rack is less than the number of interface card slots of a motherboard to cause at least one of the interface card slots to be left unused so as to shorten the height of the back plate and further to shorten the height of the rack. Furthermore, a design allowing the rear end of a power support to be extended out of the back plate to the outside with a small distance by moving the back plate toward the front end of the rack further to shorten the length of the rack to allow a desktop computer to be lighter and handier.