动产用益质权包含动产质权和动产用益债权两种不同性质的权利,是动产质押法律关系与动产用益债权法律关系竞合的产物。动产用益质权的设立弥补了质物不能用益的缺憾。动产用益质权法律关系,也可以同时是占有媒介关系的竞合。用益质权人占有的本权有两个,一是质押债权,一是用益债权。两种法律关系虽然竞合,但作为法律关系标的的给付并不相同,对孳息收取的效力也就不同。单纯的质权人只能收取天然孳息,应与法定孳息绝缘。 The right pledge of movable property includes two kinds of rights of different nature such as the pledge of movable property and the claim of movable property, which is the result of the cooperation between the legal relationship of movable pledge and the legal relationship of movable interest claims. The establishment of movability pledge makes up for the shortcomings that the pledges can not be used. The legal relationship between movable property and pledge of benefit can also mean competing for possession of media relations at the same time. Benefit pledge holders have the right to own two, one pledged debt, one is the beneficial claims. Although the two legal relations compete with each other, the payment as the subject of legal relations is not the same, and the effectiveness of collecting the fruits is also different. A simple pledgee can only collect natural fruits and should be insulated from the legal fruits.