Abstract: A cleaning equipment includes a first take-up reel, a first supply reel, a frame, a first cleaning film, and a transmission assembly. The frame includes an inner space accommodating the first take-up reel and the first supply reel side by side and an outer surface having at least one gap communicating with the inner space. The first cleaning film has a supply part on the first supply reel, a take-up part on the first take-up reel, and a middle part at least partially covering the outer surface of the frame. Two ends of the middle part enter the inner space through the at least one gap and are connected to the supply part and the take-up part, respectively. The transmission assembly is coupled to the first supply reel and the first take-up reel and drives at least one of the first supply reel and the first take-up reel to rotate.

Abstract: A cleaning robot includes a main body and a cleaning module. The main body is configured to move on a floor along a travelling direction. The cleaning module includes a first shaft and some first roller sets. The first shaft is connected with the main body. The first shaft extends along a first axis perpendicular to the travelling direction. The first roller sets are separated from each other. Each first roller set includes a first bearing, a first tire and a first flexible structure. The first shaft penetrates through the first bearing. The first tire includes a first cleaning surface configured to abut against the floor. The first flexible structure includes a first inner surface and a first outer surface. The first inner surface abuts against the first bearing. The first outer surface abuts against the first tire. The first flexible structure has a first elasticity.

Abstract: A key unit includes a key a hollow housing securely mounted on a base frame of a computer keyboard, an actuating member, and a spring member. The hollow housing includes a top wall with an opening, a first pair of opposed side walls, and a second pair of opposed side walls. A vertical track is formed in each of inner surface of the first pair of opposed side walls. A resounding plate is mounted on an inner surface of one of the second pair of opposed side walls. The actuating member includes an upper column which extends through the opening in the housing and is adapted to engage with the key. An extension projects outward from each of two opposed sides of the upper column for engaging with the associated vertical track in the housing. The spring member includes an axle which is pivotally mounted between the first pair of opposed side walls and first and second arcuate members projecting outward from the axle and extending away from each other.