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add_action( 'woocommerce_single_product_summary', 'add_contact_form', 35 );
function add_contact_form() {
	echo '<input id="richiedi-info" type="submit" value="Chiedi informazioni" class="wpcf7-form-control wpcf7-submit">';
        echo do_shortcode('<div id="containter-form-info" style="display:none">[contact-form-7 id="11592" title="richiedi informazioni prodotto"]</div>');

}

<script type="text/javascript">
jQuery( document ).ready(function() {
    jQuery('#richiedi-info').click(function(){ jQuery('#containter-form-info').stop().slideToggle( "slow"); });
});
</script>