Windows and doors assembly having ventilation function and horizontal contact function

A windows and doors assembly having a ventilation function and a horizontal contact function, comprising:

• a window frame, and a windowsill in which the window frame is slidably installed;
• a handle rotatably installed on the window frame;
• an engagement unit provided on a lateral surface of the window frame, linked to movement of the handle, and moved in upward and downward directions;
• an engagement guide provided on the windowsill to face the engagement unit and configured to catch or not catch the engagement unit depending on a position of the engagement unit;
• and
• a horizontal moving device provided on at least one of a top surface or a bottom surface of the window frame, linked to the handle, and configured to make the window frame come into horizontal contact with the windowsill or to release horizontal contact depending on movement of the handle,
• wherein the horizontal moving device comprises:
• a fixing plate;
• a moving plate disposed to be relatively moved on the fixing plate in a horizontal direction in which the window comes into contact with the windowsill or is moved apart from the windowsill and comprising a moving unit moveably installed along a rail of the windowsill;
• a straight moving member that is connected to the fixing plate and is straightly moved by a predetermined distance by moving an operating bar connected to the handle of the window;
• and
• a pair of operating links configured to horizontally move the moving plate with respect to the fixing plate as the straight moving member is straightly moved,
• wherein the straight moving member comprises an operating hole into which an operating pin of the operating bar is inserted and configured to move the straight moving member immediately when the handle is rotated, and a guide hole into which a connection pin for connecting the operating links is inserted and configured to guide movement of the connection pin by moving the straight moving member,
• wherein when a contact state of the window with respect to the windowsill by the horizontal moving device is released while a catching operation between the engagement unit and the engagement guide is performed, it is possible to ventilate through a gap between the window and the windowsill, the window is restrictly moved to form the gap, and the window is prevented from being freely open,
• wherein the engagement unit comprises an engagement step formed with a step difference,
• wherein the engagement guide comprises a body part, an engagement groove formed on the body part, and an opening formed below the engagement groove and connected to the engagement groove,
• wherein the engagement groove comprises an upper groove, an intermediate groove, and a lower groove, and the upper groove is disposed to be inclined in one direction compared with the lower groove, and
• wherein a direction in which the upper groove is inclined corresponds to a direction in which the window frame comes into contact with the windowsill.