CROSS-REFERENCE TO RELATED APPLICATION(S)

This application claims priority to Chinese patent application no. 201910855970.2 filed on Sep. 10, 2019.

BACKGROUND

1. Field of the Invention

The present invention relates to child safety seats.

2. Description of the Related Art

A child safety seat is typically used in an automobile vehicle to properly restrain a child in the event of accidental collision. Generally, latches devices and a top tether may be respectively provided in the support base and at a top of the child seat for attaching the child safety seat on a vehicle. Moreover, the child safety seat may have an alert apparatus that can warn a caregiver when the latches devices and the top tether are incorrectly installed. For example, Chinese application publication no. CN 109177830 A discloses an alert apparatus that uses sensors for detecting the positions of the latches devices and top tether, and a signal processing unit that receives detection signals from the sensors and outputs a control signal to an alert emitter. Unfortunately, this construction is complex, may have a longer response time, and may be subjected to failure caused by damaged or faulty parts.

Therefore, there is a need for an improved child safety seat that is capable of alerting a caregiver when an improper installation occurs and address at least the foregoing issues.

SUMMARY

The present application describes a child safety seat having an alert system that is simple in construction and can effectively alert of an improper installation of the child safety seat on a vehicle seat.

According to one aspect, the child safety seat includes a first and a second restraining device, and an alert device and a first and a second switch serially connected in a series circuit. Each of the first and second restraining device is deployable to respectively engage with a corresponding structure provided in a vehicle for restraining the child safety seat, the second restraining device being operable independently of the first restraining device, and each of the first and second restraining device respectively having an idle position and a deployed position. The first switch is operatively coupled to the first restraining device and the second switch is operatively coupled to the second restraining device, each of the first and second switch respectively having an open state and a closed state. The first switch is in the closed state when the first restraining device is in the deployed position and the second switch is in the closed state when the second restraining device is in the idle position, whereby the alert device is activable to emit an alert signal when the first restraining device is in the deployed position and the second restraining device in the idle position.

