Middle open type window winder

Abstract

The invention relates to a middle open type window winder which comprises a window sill, a window frame and a window sash, wherein the window frame is installed on the window sill, and the upper side of the window sash is connected with the window frame. The window winder is characterized by comprising a window winder body, a left window sash part push-and-pull mechanism, a right window sash part push-and-pull mechanism and two parallel push-and-pull arms, wherein the window winder body is fixed on the window sill; the left end of the window frame is provided with the left window sash part push-and-pull mechanism, the right end of the window frame is provided with the right window sash part push-and-pull mechanism, and the left window sash part push-and-pull mechanism and the right window sash part push-and-pull mechanism are in contact with the window sash; and the top ends of the two parallel push-and-pull arms are connected with the window sash, and the bottom ends of the two parallel push-and-pull arms are connected with the window winder body. Through the push-and-pull arms composed of two-section hinges, a user can easily open or close the window sash without exerting too much force or stretching the hands out of the window to operate. Meanwhile, the window sash is pushed or retracted at a constant speed, so that the window sash can not collide with the window frame.

Description

technical field [0001] The invention relates to an opening and closing device for a window sash, in particular to a center-opening window swinging device. Background technique [0002] As far as the existing construction field is concerned, the opening or closing of the window sashes used in most buildings needs to be done manually by the user. Moreover, the arm should be stretched out of the window during operation. Sometimes due to the weight of the sash itself or the tightness of the connection, it takes a lot of effort to open or close the sash, which is inconvenient in operation. At the same time, during the opening or closing of the sash, unnecessary collisions between the sash and the window frame often occur. Contents of the invention [0003] The object of the present invention is to overcome the above problems existing in the prior art, and to provide a center-opening window swing device. [0004] In order to realize the object of the present invention, the cen...

AI Technical Summary

Problems solved by technology

Moreover, the arm should be stretched out of the window during operation. Sometimes due to the weight of the sash itself or the tightness of the connection, it takes a lot of effort to open or close the sash, which is more inconvenient in operation.

At the same time, during the opening or closing of the sash, there is often an unnecessary collision between the sash and the window frame

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