Translate the given Spanish text to English
--------
Question: A toy vehicle is disclosed.

Answer: Se describe un vehículo de juguete.


Question: The substituents and variables are defined in the claims.

Answer: Los sustituyentes y variables se definen en las reivindicaciones.


Question: Once released, the coupling self-engages.

Answer:
Una vez liberado, el acoplamiento auto engancha.