Lock bar-on-slide rail style drawer antitipping safety device

A lock bar-on-slide rail style drawer antitipping safety device, comprising a cabinet body, a top drawer, at least one middle drawer, and at least one bottom drawer, wherein the top drawer, the at least one middle drawer, and the at least one bottom drawer are each provided with a sliding portion projecting from one side thereof, wherein each of the sliding portions is formed, in an end portion thereof facing toward an outside of the cabinet body, with an upper slope, a stop surface, and a lower slope, and the upper slope and the lower slope are respectively arranged on upper and lower ends of the stop surface and are inclined in a direction toward an inside of the cabinet body;

• and an end portion of each of the sliding portions that faces toward the inside of the cabinet body is extended as a straight line in a horizontal direction;
• a slide rail is arranged below the sliding portion of the top drawer and corresponding, in shape, to a lower edge of the sliding portion;
• and the cabinet body comprises a vertical slide rail slidably mounted at one side that corresponds to the sliding portions, wherein the vertical slide rail is provided, in a manner of being slidably mounted thereto in a sequence from top to bottom, a first lock bar, a second lock bar, and a third lock bar, a gap being present between a bottom end of the first lock bar and a top end of the second lock bar, wherein the first lock bar is provided, on each of a top end and the bottom end thereof, with a stop portion projecting therefrom toward the sliding portion;
• the second lock bar is provided, on each of the top end and a bottom end thereof, with a stop portion projecting therefrom toward the sliding portion;
• the first lock bar is provided, on the bottom thereof, with a first bearing portion and a first bottom hole, the first bearing portion being located upward of the first bottom hole;
• the second lock bar is provided, on the top thereof that faces toward the bottom end of the first lock bar, with a second top peg that projects therefrom and corresponds to the first bottom hole, a top end of the second top peg being supported on the first bearing portion;
• the second lock bar is provided, on the bottom thereof, with a second bearing portion and a second bottom hole, the second bearing portion being located upward of the second bottom hole;
• the third lock bar is provided, on the top thereof that faces toward the bottom of the second lock bar, with a third top peg that projects therefrom and corresponds to the second bottom hole, a top end of the third top peg being supported on the second bearing portion;
• and a first elastic element is arranged between a bottom of the third lock bar and the cabinet body.