How to declear a table name in zend farmework

class Model_DbTable_User extends Zend_Db_Table_Abstract
{
protected $_name;// = ‘users ‘;

public function init()
{
$this->_name = ‘users’;
}
}
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Model_DbTable_User => model/DbTable/user.php

protected $_name => Initialize to variable

$this->_name = ‘users’ => Initialize to users Table.