| CPC B60Q 9/002 (2013.01) [B60N 2/0035 (2023.08)] | 5 Claims | 

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               1. An in-vehicle device comprising: 
            a parking state detector configured to detect a parking state of a vehicle; 
                a vehicle cabin situation detector configured to detect a situation in a vehicle cabin of the vehicle; 
                a child information detector configured to detect presence of a child and position information on the child in the vehicle cabin based on a signal from a seat sensor provided on a child seat in the vehicle cabin; 
                a temperature information acquisition unit configured to acquire temperature information in the vehicle cabin; 
                a notification unit configured to, when the child is left in the vehicle cabin, notify outside of the vehicle that leaving of the child has occurred; 
                a controller configured to, when the vehicle is in the parking state, control a notification mode of the notification unit according to information including the temperature information in the vehicle cabin; and 
                a vehicle surrounding information acquisition unit configured to acquire surrounding information on the vehicle, wherein 
                the controller is configured to set a temperature for controlling the notification mode of the notification unit when the acquired surrounding information indicates that there is no person around the vehicle to be lower than a temperature for controlling the notification mode of the notification unit when the acquired surrounding information indicates that there is a person around the vehicle. 
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