KR200180715Y1 - Open-close device of a casement window - Google Patents

Abstract

The present invention relates to the opening and closing device of the casement window, the present invention was not easy to manufacture the worm wheel and the operation link, and because the worm wheel and the connecting link is manufactured by heat treatment to solve the problems of the prior art that the manufacturing cost is increased It was designed to do so. The invention devises a drive shaft rotated by a handle and a worm gear is formed at the lower end, a worm wheel driven by being engaged with the drive shaft, an operation link driven by the worm wheel and installed in the window frame to open and close a window, and an upper portion of the operation link. It is composed of a control piece that is coupled to the operating piece and the operating piece is coupled to the operating piece to rotate the operating piece to fully open and partially open the window, and the adjustment handle is coupled to the control piece to adjust the full opening and partial opening of the window, According to the present invention, it is easy to manufacture the opening and closing device for opening and closing the window, and reduce the manufacturing cost, and by installing the oil loading member on the handle shaft to make the handle shaft smoothly and smoothly when opening and closing the window, Noise can be suppressed, and the area contacted with the operating piece and the control piece by the anti-friction protrusion formed on the control piece Less friction noise can be prevented, and the position of the handle shaft to which the adjusting knob and the handle are fitted is different, thereby providing an effect of not being interfered with when the handle is operated.

Description

OPEN-CLOSE DEVICE OF A CASEMENT WINDOW}

The present invention relates to an opening and closing device of the casement window, and in detail, to facilitate the manufacture of the opening and closing device installed in the casement window, reduce the production cost, opening and closing of the casement window that can suppress the noise generated when opening and closing the window Relates to a device.

Generally, a window opening device is used to adjust the position of the casement window. The window opening and closing device includes a window opening device operated by a motor and a window opening and closing device that opens and closes the window by using a handle. It is well known that the device for opening and closing the window is installed on the wall forming the window and the operation link is installed on the window frame to open and close the window.

Accordingly, the opening and closing device of the casement window according to the prior art rotates by the operation of the handle and the worm gear is formed at one end, the worm wheel is engaged with the worm gear of the drive shaft to rotate, and the operation integrally attached to the worm wheel It was made of a link, the coupling end formed in the actuating link is connected to the window frame by a plurality of connecting links.

However, such a conventional technology is not easy to manufacture because the worm wheel and the operation link is integrally formed, and the worm wheel is manufactured by heat treatment. In this case, the connection link is also manufactured by heat treatment, thereby increasing the manufacturing cost. There was a problem that noise occurs when opening and closing the window.

The present invention was devised to solve the above problems, the technical problem of the present invention is to facilitate the manufacture of the opening and closing device, the production cost is reduced, the case of the casement window that can suppress the noise generated when opening and closing the window To provide a switchgear.

1 is a perspective view of the opening and closing device of the casement window according to the first embodiment of the present invention installed on the window.

Figure 2 is an exploded perspective view showing the opening and closing device of the casement window according to an embodiment of the present invention.

Figure 3 is a plan view of the opening and closing state of the casement window coupled to the present invention.

4 is a cross-sectional view taken along the line A-A of FIG.

5 is a cross-sectional view taken along the line B-B in FIG.

Figure 6 is a plan view as seen from the cover is separated from the opening and closing device of the casement window according to the present invention, Figure 6a is a plan view of the rotation angle of the operation link in a closed position, Figure 6b is the rotation angle of the operation link Fig. 6C is a plan view of the partially open state, and Fig. 6C is a plan view of the state in which the rotation angle of the operation link is completely open.

Figure 7a, b, c is a perspective view of the main portion showing the operating state of the operating piece and the control piece in the present invention.

8 is an enlarged cross-sectional view of the main portion of the coupling state of the cover and the adjusting knob according to the present invention.

9 is a perspective view illustrating a main portion separated in a state in which a driven gear and a driving gear are installed as a second embodiment according to the present invention;

10 is a cross-sectional view of the coupled state of FIG.

<Description of the code | symbol about the principal part of drawing>

1: switchgear 10: housing

12 housing shaft wall 12a insertion hole

14: support end 14a: engaging projection

16: coupling portion 20: handle shaft

21: flange 22: connecting piece

23: worm gear 30: worm wheel

32: fitting hole 40: operation link

41: body 42: fitting protrusion

44: control projection 46: coupling end

50: operating piece 52: guide protrusion

52a: slope 54: protrusion

54a: fitting groove 60: control piece

62: installer 64: stopper

66: antifriction protrusion 70: cover

72: cover shaft wall 72a: coupling hole

74: adjustment protrusion 74a: through hole

74b: locking groove 80: adjustment knob

82: fitting groove 86: leaf spring

90: driven gear 92: drive gear

96: handle

The present invention for solving the above technical problem is a housing shaft wall having an insertion hole at one end is integrally formed, the other end is formed with a support end having a coupling protrusion on the upper end and the housing is formed in the center; A handle shaft installed at the insertion hole of the housing shaft wall so as to be rotated by a handle, a flange portion is formed at the center, a connection piece is formed at the upper end, and a worm gear at the lower end; A worm wheel installed in the coupling part to be driven by being engaged with the worm gear and having a plurality of fitting holes drilled from the upper surface to the lower surface; A body having a fitting protrusion formed on a bottom surface of the worm wheel to be opened and closed to open and close a window, and a control protrusion protruding from one side of the upper surface; And an operating link formed integrally extending at one end of the body; An operating piece seated on an upper portion of the body of the operation link and having a guide protrusion having an inclined surface at a lower end thereof, and a protrusion having a fitting groove therein at an upper end thereof; An installation hole is formed at one side so as to be coupled to the coupling protrusion of the housing, and a stopper is formed at the other side to catch the control protrusion of the operation link and partially open the window. A control piece having anti-friction projections capable of completely opening the window and preventing friction; A cover shaft wall coupled with the housing and having a coupling hole formed at an upper side thereof with a coupling hole such that a connection piece of a handle shaft installed at the insertion hole of the housing is protruded to the outside; It is characterized in that it comprises a control knob coupled to the protrusion of the operating piece through the through hole of the cover to adjust the control piece and the control release for the control piece.

In addition, a fitting groove is formed at one side of the inner circumferential surface of the adjusting knob, and a leaf spring of a metal material is installed at the fitting groove, and a plurality of locking grooves are formed at the outer circumferential surface of the adjusting protrusion so that one end of the leaf spring can be fitted. It is characterized by.

In addition, a driven gear coupled to the adjustment knob and driven is installed on an inner surface of the cover in which the adjustment protrusion is formed, and one side of the cover is driven by being engaged with the driven gear, and a driving gear coupled to the working piece is installed. do.

An embodiment of the present invention configured as described above will be described in detail with reference to FIGS. 1 to 5 as follows.

1 is a perspective view of a case opening and closing device of the case according to the first embodiment of the present invention is installed in the window, Figure 2 is an exploded perspective view showing the opening and closing device of the casement window according to an embodiment of the present invention, Figure 3 Is a plan view of a case opening and closing device of the case according to the present invention is coupled, Figure 4 is a cross-sectional view taken along the line AA of Figure 3, Figure 5 is a cross-sectional view taken along the line BB of Figure 3, the subject innovation opening and closing device 1 is a housing ( 10), the handle shaft 20 rotates by the handle 96 and the worm gear 23 is formed, the worm wheel 30, the operating link 40, the operating piece 50, the control piece 60, the cover ( 70), the adjusting knob (80).

Specifically, the housing 10 is integrally formed at one end and has a housing shaft wall 12 having an insertion hole 12a therein, and a support end 14 formed at the other end and having a coupling protrusion 14a thereon. ), And the coupling portion 16 formed in the center. A fixing protrusion 12b protrudes from an inner surface of the inlet side insertion hole 12a of the housing shaft wall 12.

The handle shaft 20 is installed in the insertion hole 12a of the housing shaft wall 12 and rotated by the handle 96, the flange portion 21 formed at the center, the connecting piece 22 formed at the upper end portion, It is composed of worm gear 23 formed at the lower end. In addition, through-holes 24a and 24b are formed vertically between the lower portion of the flange portion 21 and the worm gear 23, and an accommodating space 25 is formed in the inner side thereof, and a folding groove (middle) is formed in the middle. Is formed and is installed with an oil loading member 24 which is formed in a cylindrical shape with respect to the folding groove, the spring between the upper portion of the flange portion 21 and the connecting piece 22 in the upper portion of the flange portion 21. A washer 27 is fitted, and a resin bearing 28 is fitted on the spring washer 27 and a closing member 29 is formed in the resin bearing 28 to form a space portion 29a in which oil is filled. Is installed.

The worm wheel 30 is driven by being engaged with the worm gear 23, and is composed of a shaft hole 31 formed in the center and a plurality of fitting holes 32 drilled outward of the shaft hole 31. . At this time, the fitting hole 32 is installed at intervals of 180 degrees.

The operation link 40 is coupled to the worm wheel 30 to open and close the window, consisting of a body 41 and the coupling end 46, the body 41 is a plurality of fittings formed on the bottom The protrusion 42, the control protrusion 44 protruding on one side of the upper surface, and the shaft hole 45 penetrated in the center.

The operation piece 50 is mounted on the upper portion of the body 41 of the operation link 40, the guide protrusion 52 having an inclined surface 52a protruding integrally at the lower end, and formed in the upper end and fitted inside It consists of the projections 54 provided with the groove | channel 54a.

The control piece 60 is coupled to the engaging projection 14a of the housing 10, the installation hole 62 formed on one side, and formed on the other side to the control projection 44 of the operation link 40 Stopper 64 for hanging and partially opening the window, and is formed on the bottom surface of the front part of the stopper 64 to prevent the friction to fully open the window and prevent friction by the inclined surface 52a of the guide protrusion 52 It is composed of a projection (66).

The cover 70 is to be coupled to the housing 10, the coupling hole formed so that the connection piece 22 of the handle shaft 20 installed in the insertion hole 12a of the housing 10 on one side to protrude to the outside ( A cover shaft wall 72 having a 72a, an adjustment protrusion 74 integrally formed on the other upper surface and having a through hole 74a therein, and a plurality of hooks formed on an outer circumferential surface of the adjustment protrusion 74. It is comprised by the groove | channel 74b.

The adjusting knob 80 is coupled to the protrusion 54 of the operating piece 50 through the through hole 74a of the cover 70 to control and control the operating piece 54 to the control piece 60. By adjusting the release, it is composed of a fitting groove 82 formed on one side of the inner circumferential surface, and a direction indicating protrusion 84 protruding on one side of the outer circumferential surface.

On the other hand, reference numeral 86 is coupled to the fitting groove 82 of the adjustment knob 80 by a plate spring of a metal material having its own elastic force, one side of the leaf spring 86 to the operation of the adjustment knob 80 By the locking groove 74b. And the finishing material 88 is coupled to the inner lower end of the adjustment knob 80, which not only prevents the leaf spring 86 from being separated from the adjustment knob 80, but also the leaf spring when the adjustment knob 80 is operated ( 86) It reduces the noise generated by friction.

Referring to the assembling process of the opening and closing device of the casement window according to the present invention configured as described above, the handle shaft 20 is fixed to the insertion hole 12a of the housing shaft wall 12 formed in the housing 10, but before The oil loading member 24 is installed at the lower portion of the flange portion 21 formed in the handle shaft 20 in a cylindrical shape by folding the center of the folding groove and filled with oil in the receiving space 25. Then, the spring washer 27, the resin bearing 28, and the closing member 29 are installed in the upper portion of the flange portion 21, and the oil is filled in the space portion 29a.

In this state, the handle shaft 20 is coupled to the insertion hole 12a of the housing shaft wall 12, and the fixing protrusion 12b formed in the insertion hole 12b of the housing shaft wall 12 is closed with the closing member 29. It is good to cock on the upper surface of).

When the handle shaft 20 is installed on the housing shaft wall 12, the worm wheel 30 and the operation link 40 are fixed to the coupling portion 16 of the housing 10 in order. That is, when the handle shaft 20 is installed, the worm wheel 30 is installed on the coupling portion 16 of the housing 10 so as to be engaged with the worm gear 23, and the operation link (top) of the worm wheel 30 is installed. 40 may be installed, and the fitting protrusions 42 protruding from the bottom surface of the body 41 of the operation link 40 are coupled to the fitting holes 32 formed in the worm wheel 30. In this state, the fixing pin 98 is connected to the shaft hole 31 of the coupling hole 16a and the worm wheel 30 and the shaft hole 45 of the operation link 40 formed in the coupling part 16 of the housing 10. When combined to penetrate through, the worm wheel 30 and the operation link 40 are firmly installed in the housing 10.

When combined as described above, the installation hole 62 of the control piece 60 is inserted into the engaging projection 14a of the support end 14 formed in the housing 10. Then, the anti-friction projections 66 protruding from the bottom of the control piece 60 is in contact with the upper surface of the operation link (40).

Then, the cover 70 is coupled to the housing 10. Before that, the leaf spring 86 is coupled to the fitting groove 82 formed on the inner circumferential surface of the adjustment knob 80, and the leaf spring 86 is formed. The control knob 80 is installed on the lower end of the finishing material 88 so as not to be separated. Then, the adjustment knob 80 is installed on the adjustment protrusion 74 integrally formed on the other side of the cover 70, but the insertion protrusion 83 protruding on the bottom surface of the adjustment handle 80, the adjustment protrusion 74 The insertion knob (54) of the operating piece (50) is inserted into the insertion piece (83) of the adjusting knob (80) inserted through the through hole (74a) and inserted into the through hole (74). And working piece 50 are combined. At this time, one side of the leaf spring 86 is coupled to the engaging groove 74b formed on the outer circumferential surface of the adjustment protrusion 74.

In this state, the cover 70 may be coupled to the housing 10, and at the same time, the upper end of the handle shaft 20 may be coupled to the coupling hole 72a of the cover shaft wall 72 formed at one side of the cover 70. The connecting piece 22 formed at the upper end of the handle shaft 20 protrudes outward.

The assembled opening and closing device 1 may be installed on the wall surface constituting the window as shown in Figure 1, the operation link 40 may be installed on the window frame through a plurality of connecting links (49).

When described in detail based on the accompanying drawings the operation of the present invention constructed and assembled as described above are as follows.

In one embodiment, when the handle 96 coupled to the connecting piece 22 of the handle shaft 20 is rotated counterclockwise to open the window, the handle shaft 20 rotates counterclockwise, and the handle shaft ( The worm wheel 30 engaged by the worm gear 23 by 20 is rotated in a clockwise direction. The worm wheel 30 opens the window while the operation link 40 coupled to the worm wheel 30 is operated. When the handle 96 is rotated clockwise, the handle shaft 20 rotates clockwise, and the worm wheel engaged with the worm gear 23 by the handle shaft 20 is partially opened and fully opened. 30 rotates in a counterclockwise direction, with the worm wheel 30 actuating the actuating link 40 coupled to the worm wheel 30 to partially open and completely close the window. Here, when the direction indicating protrusion 84 of the adjusting knob 80 is moved from the II position to the I position, the worm wheel 30 rotates to a position corresponding to the partial opening of the window frame, and conversely, the adjusting knob 80 is rotated. When moved to position I to position II, the worm wheel 30 is rotated to a position corresponding to the full opening of the window frame.

The present invention operated as described above will be described in detail with reference to FIGS. 6 to 7 as follows.

In order to partially open the window in the state as shown in FIGS. 6A and 7A, first, the direction indicating protrusion 84 of the adjusting knob 80 points to the I position. Then, the operation piece 50 and the control piece 60 are spaced apart from each other as shown in FIG. 7A. In this state, when the handle 96 installed on the connecting piece 22 of the handle shaft 20 is rotated counterclockwise, the handle shaft 20 rotates counterclockwise, and the worm gear is driven by the handle shaft 20. The worm wheel 30 engaged with the 23 rotates in a clockwise direction, and the worm wheel 30 partially opens the window while the operation link 40 coupled to the worm wheel 30 is operated. That is, when the operation link 40 rotates, the control protrusion 44 protruding from the upper surface of the body 41 of the operation link 40 comes into contact with the stopper 64 of the control piece 60, as shown in FIG. 7B. By this contact, the rotation of the worm wheel 30 is limited to an angle (about 30 °) corresponding to the partial opening of the window frame to partially open the window (see FIG. 6B).

When the window is closed in this state, when the handle 96 is rotated clockwise, the handle shaft 20 rotates clockwise and the worm wheel is engaged with the worm gear 23 by the handle shaft 20. 30 rotates in a counterclockwise direction, and the operation link 40 coupled to the worm wheel 30 is operated by the worm wheel 30 to close the window, as shown in FIGS. 6A and 7A. Here, when the operation link 40 rotates, the control protrusion 44 protruding from the upper surface of the body 41 of the operation link 40 and the stopper 64 of the control piece 60 are released from contact.

In order to completely open the window, the adjustment knob 80 is moved so that the direction indicating protrusion 84 points to the II position. Then, the leaf spring 86 coupled to the fitting groove 82 by the movement of the adjustment handle 80 is compressed by its own elastic force, and then the locking groove 74b of the adjustment protrusion 74 formed on the outer circumferential surface of the cover 70. The guide protrusion 52 of the operating piece 50 is brought into contact with the anti-friction protrusion 66 of the control piece 60 while the operating piece 50 coupled to the adjusting knob 80 rotates at the same time. At the same time, the anti-friction projection 66 of the control piece 60 is positioned on the inclined surface 52a of the guide protrusion 52 (see FIG. 7C).

In this state, when the handle 96 is rotated counterclockwise in the same manner as described above, the handle shaft 20 rotates counterclockwise, and is engaged with the worm gear 23 by the handle shaft 20. The worm wheel 30 rotates in a clockwise direction, and the worm wheel 30 opens the window while the operation link 40 coupled to the worm wheel 30 is operated. That is, when the operation link 40 is rotated, the control protrusion 44 protruding from the upper surface of the body 41 of the operation link 40 is located on the stopper 64 of the control piece 60, the operation link ( The contact of the control protrusion 44 and the stopper 64 of the 40 is released, thereby allowing the rotation of the worm wheel 30 to be rotated to an angle (about 110 °) corresponding to the full opening of the window frame. It is fully open (see Figure 6c).

When the window is closed in this state, when the handle 96 is rotated clockwise, the handle shaft 20 rotates clockwise and the worm wheel is engaged with the worm gear 23 by the handle shaft 20. 30 rotates in a counterclockwise direction, and the window is closed while the operation link 40 coupled to the worm wheel 30 is operated by the worm wheel 30 (see FIGS. 6A and 7A).

As such, the present invention facilitates the assembly and fabrication of the switchgear 1, reduces the manufacturing cost, and facilitates the use of the switchgear 1. The friction preventing protrusion 66 allows the operation piece 50 and the control piece 60 to be used. Since the contact area is small, it is possible to prevent the friction sound, and the position of the adjusting knob 80 and the position of the handle shaft 20 to which the handle 96 is fitted are different so that the handle 96 is not interfered with the operation of the handle 96.

On the other hand, the operation of the handle shaft 20 in the opening and closing device 1 of the present invention will be described briefly based on the accompanying drawings, FIG. As shown, when the handle 96 is rotated, the oil filled in the receiving space 25 of the oil charging member 24 installed in the handle shaft 20 is provided to the worm gear 23 through the lower through hole 24b. The oil filled in the space portion 29a between the resin bearing 28 and the finishing member 29 is provided on the flange portion 21 and lubricated to smoothly and smoothly operate the handle shaft 20. It also reduces the noise generated when opening and closing windows.

And 9 to 10 is a second embodiment of the present invention, which is the driven gear 90 is driven by the adjustment handle 80 is coupled to the inner surface of the cover 70, the adjustment protrusion 74 is formed It is installed, the drive gear 92 is coupled to the driven gear 90 is driven and coupled to the operation piece 50 is installed on one side, the distance between the handle shaft 20 and the adjustment knob 80 is far The handle 96 prevents the interference between the handle shaft 20 and the adjusting knob 80 during operation.

The operation of the second embodiment according to the present invention configured as described above is as follows.

When the adjustment knob 80 is rotated right from the I position to the II position to completely open the window, the driven gear 90 rotates clockwise by the movement of the adjustment knob 80 and is driven by the driven gear 90. The gear 92 is rotated counterclockwise. When the driving gear 92 rotates, the operating piece 50 coupled to the driving gear 92 rotates so that the guide protrusion 52 of the operating piece 50 causes the anti-friction protrusion 66 of the control piece 60 to rotate. ), The anti-friction protrusion 66 of the control piece 60 is positioned on the inclined surface 52a of the guide protrusion 52. Rotating the handle 96 in this state opens the window completely.

On the contrary, in order to partially open the window, when the adjusting knob 80 is rotated from the II to the I position to the left, the driven gear 90 is rotated counterclockwise by the movement of the adjusting knob 80 and the driven gear 90 is rotated. The drive gear 92 is rotated clockwise. When the driving gear 92 rotates, the operating piece 50 coupled to the driving gear 92 rotates to release contact between the operating piece 50 and the control piece 60. Rotating the handle 96 in this state will partially open the window.

Meanwhile, in the present invention, the plate spring 86 is described as being operated by installing only one of the adjustment knobs 80, but the present invention is not limited thereto, and a plurality of plate springs 86 may be installed and used on the adjustment knobs 80. .

According to the opening and closing device of the subject innovation window as described in detail above, a drive shaft rotated by a handle and a worm gear is formed at the lower end, a worm wheel driven by being engaged with the drive shaft, and driven by the worm wheel and a window frame An operation link installed in the opening and closing window, a control piece that is coupled to the operation piece seated on an upper portion of the operation link and the operation piece to rotate the operation piece to completely open and partially open the window, and is coupled to the control piece. It is composed of a control knob for adjusting the full opening and partial opening of the window, according to the present invention facilitates the manufacture of the opening and closing device for opening and closing the casement window, reducing the manufacturing cost, by installing the oil loading member on the handle shaft When opening and closing the window, the window can be operated smoothly and smoothly. The noise generated during closing can be suppressed, and the friction preventing protrusion formed on the control piece prevents the friction sound due to the small area of contact with the operating piece and the control piece, and the handle shaft to which the adjustment knob and the handle are fitted is different. Useful effects such as no interference in operation are provided.

In addition, a driven gear coupled to the driving knob is installed on the inner side of the cover, and one side of the cover is provided with a driving gear engaged with the driven gear and coupled to the operating piece, thereby preventing interference between the handle shaft and the adjusting knob. Prevents.

The invention has been shown and described with respect to a specific preferred embodiment, but the invention is not limited to the embodiment described above, the field to which the subject innovation belongs without departing from the gist of the subject innovation claimed in the utility model registration claims Anyone of ordinary skill in the art would be able to make various modifications.

Claims (3)

A housing 10 having a housing shaft wall 12 having an insertion hole 12a at one end is integrally formed, and at the other end, a support end 14 having a coupling protrusion 14a at an upper end thereof and a coupling part 16 formed at the center thereof. ); Is installed in the insertion hole 12a of the housing shaft wall 12, the flange portion 21 is formed in the center to be rotated by the handle 96, the connecting piece 22 is formed at the upper end, the worm gear 23 at the lower end Handle shaft 20 is formed; A worm wheel 30 installed in the coupling part 16 of the housing 10 to be driven and engaged with the worm gear 23 and having a plurality of fitting holes 32 drilled from the upper surface to the lower surface thereof; A body 41 formed with a fitting protrusion 42 on a bottom surface of the worm wheel 30 so as to be inserted into the fitting hole 32 of the worm wheel 30, and a control protrusion 44 protruding from one side of the upper surface thereof; And An operation link 40 formed of a coupling end 46 extending integrally with one end of the body 41; A guide piece 52 seated on an upper portion of the body 41 of the operation link 40 and having an inclined surface 52 a is formed at a lower end thereof, and an operating piece having a protrusion 54 having a fitting groove 54 a therein at an upper end thereof. 50; An installation hole 62 is formed at one side to be coupled to the coupling protrusion 14a of the housing 10, and a stopper for partially opening the window by hooking the control protrusion 44 of the operation link 40 to the other side. 64 is formed, the front surface of the stopper 64, the bottom surface is controlled by the anti-friction projection 66 is formed by the inclined surface (52a) of the guide protrusions 52 to completely open the window and prevent friction Piece 60; A cover shaft wall 72 having a coupling hole 72a coupled to the housing 10 and having a coupling hole 72a protruding outward from an upper side of the handle shaft 20 installed in the insertion hole 12a of the housing 10. ) Is formed and the cover 70 is formed integrally with the control protrusion (74) having a through hole (74a) in the other upper surface; An adjustment knob for engaging the protrusion 54 of the operating piece 50 through the through hole 74a of the cover 70 to control and release the control piece 60 for the control piece 60 ( 80); Opening and closing device of the casement window, characterized in that it comprises a. According to claim 1, The fitting groove 82 is formed on one side of the inner circumferential surface of the adjusting knob 80, The plate groove 86 of the metal is built in the fitting groove 82, the plate spring (86) of Opening and closing device of the casement window, characterized in that a plurality of engaging grooves (74b) is formed on the outer circumferential surface of the adjustment protrusion (74) so that one side end can be fitted. According to claim 1, A driven gear 90 coupled to the control knob 80 is driven on the inner surface of the cover 70, the control protrusion 74 is formed, one side of the driven gear 90 Opening and closing device of the casement window, characterized in that the drive gear 92 is coupled to the drive and coupled to the operating piece (50) is installed.