Pointing device

Abstract

The invention relates to an indicating device, which comprises a base layer, an indicating layer and a first phase-change material unit. The indicating layer includes a first indicating interlayer, a microporous sandwich layer and a second indicating interlayer stacked in sequence. The microporous sandwich layer on the indicating part is provided with a liquid phase channel, and the liquid phase channel communicates with the storage chamber of the phase change material. A second phase-change material unit is provided in the liquid-phase channel, and the second phase-change material unit is used to block the liquid-phase channel. When not activated, the second phase change material unit blocks the liquid phase channel. When the indicating device needs to be activated, it is only necessary to melt the second phase-change material unit by heating methods such as baking, and the melted second phase-change material can be absorbed by the microporous sandwich layer with micropores, thereby opening the liquid phase channel. This indicating device does not need to be activated by pressing, and is relatively simple to activate and can be activated in batches.

Description

technical field [0001] The present invention relates to the technical field of pointing devices, in particular to a pointing device. Background technique [0002] Food, beverages, blood, vaccines, meat and other perishable products need to be stored in a specific temperature environment. If the storage environment temperature exceeds the specified upper critical temperature, the items to be inspected will deteriorate quickly. After the items are checked, it will cause damage to the human body, and even cause death in severe cases. Therefore, it is necessary to provide an indicating device capable of accurately recording the time when the ambient temperature exceeds the upper critical temperature, so as to determine whether the stored items to be inspected are invalid. [0003] Traditional indicating devices are generally sealed in an adhesive manner, and need to be activated by pressing when in use. However, there is a risk of false activation in this way of pressing activ...

AI Technical Summary

Problems solved by technology

However, there is a risk of false activation in this way of pressing activation, and when the pressing pressure is too small, the indicating device may not be activated, and when the pressing pressure is too high, the indicating device may break from the edge and cause damage to the device

And the indicating devices need to be activated by pressing one by one. When the number of indicating devices is huge, the pressing workload is huge

That is to say, it is difficult to activate the traditional indicating device, and it is difficult to realize batch activation

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