Patent ID: 8562209
Filing Date: 2013-10-22
Classification: G01K

Abstract:
1. An electronic thermometer, including a host and a probe unit; wherein the probe unit includes a cavity and a probe; the probe with one end located inside the cavity which is able to move in axial reciprocating motion; wherein the probe has a first location that extends the longest from the cavity, and a second location that extends the shortest from the cavity; and its feature is that the probe comprises a pre-heating mechanism and a control switch, and the pre-heating mechanism is connected with the probe and the control switch is connected with the host of the electronic thermometer by wires, and the reciprocating motion of the probe triggers the control switch to control electronic thermometer to work, wherein the control switch is mechanical switch, including a breakback contact located in the cavity and a moving contact located in the probe or a first spacing baffle when the probe on the second location that corresponds to the location of the breakback contact; and a closure or the departure between the breakback contact and a moving contact control the pre-heating mechanism to open or close, the first spacing baffle being located in the cavity between a linkage button and the moving contact which is also in the cavity, the linkage button being linearly aligned with the probe, the linkage button being positioned on an opposite side of the probe unit from the probe.