Practical mechanical timing switch manufacturing method


The utility model relates to an improved mechanical adj […]

The utility model relates to an improved mechanical adjustable time switch device, in particular to a multi-function spring timer which has a working time limit for an electric appliance and a working mode of selecting and adjusting an electric appliance.
The existing mechanical clockwork timer consisting of a timing control mechanism and a working mode selection adjustment mechanism has a power on/off control function, and has few working mode adjustment selection functions, such as the timing used in the current washing machine. There are only two optional working modes, strong washing and weak washing, which can not meet the requirements of the user who does not wash and wash the weak wash. The timing control shaft for the spring spring is cut with metal material. The shape is complicated and the processing is troublesome; the adjusting shaft for selecting and adjusting the working mode is integrally formed with the adjusting limit cam, and is inconvenient to assemble; when adjusting the spacing of the working mode execution contacts, the outer casing end must be removed. Cover is both cumbersome and time consuming, which is not conducive to improving work efficiency.
The utility model aims to provide a multifunctional time switch device for electric appliances which is simple in processing, easy to assemble and adjust, and has three or more optional working modes.
The utility model realizes that six gears are arranged in the speed increasing system of the timing control mechanism, and a positioning convex body exclusively for one end of the movable mounting link is arranged eccentrically on the six wheels, and the other end of the connecting rod and the working mode adjusting mechanism are arranged eccentrically on the six wheels The movable contact pieces of the middle contact group are connected, and the connecting rod drives the movable contact piece to swing left and right during operation, and the contacts are alternately contacted/disconnected with the contacts on the left and right fixed contact pieces. The distance between the left and right fixed contact pieces and the movable contact piece is relatively controlled by a pair of working support surfaces with a plurality of steps on the adjusting member, and the number of steps determines the distance between the movable contact piece and the fixed contact piece. The number of gears, and the change of the spacing directly determines the length of contact time between the contacts they are in contact with each other, thereby achieving multi-speed selection control of the working mode of the electric appliance. In order to ensure that the contacts operate with their respective constant on/off times in the various modes of operation, their spacing must be adjusted repeatedly. To this end, an adjustment window is provided at a relative position of the outer casing end cap corresponding to the contact group to facilitate repeated adjustments during commissioning after assembly is completed. A cover plate can be additionally arranged on the adjustment window, and when the adjustment is needed, the distance between the contacts can be adjusted by simply removing the cover. The control shaft is made of metal inserts and injection molded to make it easier to process. The working mode adjusting shaft is separated from the adjusting limit cam, and adopts a set structure form, which makes assembly more convenient.
Based on the above concept, the utility model can have multiple working modes, the parts are easy to process, and the installation and adjustment are convenient, which can meet the requirements of the user and is economical.