A structure of a flat press type casement window

Abstract

A flat pressure type casement window structure, including a sash, a window frame, a handle mounted on the sash, the handle is connected with a lock seat through a transmission mechanism, the window frame is provided with at least two opposite lock points; the sash and the window frame are connected by a first hinge and a second hinge, the first hinge and the second hinge both include a sash connecting piece mounted on the sash and a window frame connecting piece mounted on the window frame, the sash connecting piece is provided with a guide convex corner, and the window frame connecting piece is provided with a corner with a guide position. When the guide convex corner extends into the guide position and the sash connecting piece is parallel or substantially flush with the window frame connecting piece, the side surface of the guide convex corner and the working surface of the guide position are completely separated to form a reserved translation gap for the sash to translate into the window frame. The sash can translate into the window frame, and the end of the sash close to the hinge is not pressed against the sealing strip close to the hinge in advance, thereby prolonging the service life of the sealing strip.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of windows, in particular to a flat pressure type casement window structure. BACKGROUND

[0002] The sash and the frame of the casement window adopt a sealing strip to achieve sealing, and the sash and the frame of the casement window are connected by a hinge to achieve opening and closing, the two ends of the hinge are fixed on the frame and the sash respectively, and the opening and closing track is realized between the two through the connecting rod of the hinge, the rotating handle drives the transmission mechanism in the sash to move the lock seat, and the lock seat cooperates with the lock point on the frame to realize the opening and closing of the sash. The existing casement window can refer to Chinese patents with patent numbers CN202023277758.X and CN202023052822.4.

[0003] Referring to Chinese patents with patent numbers CN202221419352.7 and CN201920107028.3, in the prior art, the frame connecting piece of the hinge is provided with an included angle, and the sash connecting piece of the hinge is provided with a guide convex corner for cooperating with the included angle, and the opening and closing of the hinge is guided through the cooperation of the guide convex corner and the included angle; when the sash is opened, the guide convex corner on the sash connecting piece is pushed out by the working surface of the included angle guide position in the opening direction; and in the closing process of the sash, when the hinge is closed to a certain extent, the guide convex corner extends into the guide position of the included angle, and the guide convex corner on the sash connecting piece is pushed against and slides along the working surface of the guide position until the sash is completely closed.

[0004] However, since the guide convex corner is always pushed against the working surface of the guide position in the closing process of the sash, the end of the sash close to the hinge can only enter the frame first to extrude the sealing strip close to the hinge, so that the sealing strip close to the hinge is extruded in advance, and the sealing strip away from the hinge is extruded after the sash is completely closed. This structure accelerates the damage and aging of the sealing strip close to the hinge, and affects the sealing effect after the sash is closed. SUMMARY

[0005] In order to overcome the shortcomings of the prior art, the present application provides a flat pressure type casement window structure.

[0006] The technical scheme adopted by the present application to solve its technical problems is:

[0007] A flat pressure type casement window structure, comprising a sash, a frame, a handle mounted on the sash, a sealing strip provided on the sash or / and the frame; the handle is connected with a lock seat through a transmission mechanism, and the frame is provided with a lock point on at least two opposite sides;

[0008] The sash and the window frame are connected by a first hinge and a second hinge, the first hinge and the second hinge each comprise a first connecting rod, a second connecting rod and a third connecting rod, a sash connecting piece mounted on the sash, a window frame connecting piece mounted on the window frame,

[0009] The window frame connecting piece is provided with a sliding piece, and the two ends of the first connecting rod are rotationally connected with the sash connecting piece and the sliding piece respectively;

[0010] The two ends of the second connecting rod are rotationally connected with the sash connecting piece and the window frame connecting piece respectively;

[0011] One end of the third connecting rod is rotationally connected on the sash connecting piece, and the other end is rotationally connected on the middle part of the first connecting rod;

[0012] The sash connecting piece is provided with a guide convex corner, and the window frame connecting piece is provided with a corner with a guide position, characterized in that when the guide convex corner extends into the guide position and the sash connecting piece is parallel or substantially flush with the window frame connecting piece, the side surface of the guide convex corner and the working surface of the guide position are completely separated to form a reserved translation gap for the sash to translate into the window frame.

[0013] In the application, the window frame connecting piece is provided with a guide groove, the sliding piece comprises a first sliding block, a guide part and a second sliding block connected in sequence, the first sliding block and the second sliding block are respectively slidingly fitted on the opposite sides of the window frame connecting piece, and the guide part is guidedly fitted in the guide groove.

[0014] In the application, the window frame connecting piece is provided with a structural convex rib in a punching manner, the guide groove is arranged on the structural convex rib and penetrates through the structural convex rib, and the structural convex rib is used for enhancing the position of the corresponding guide groove of the window frame connecting piece.

[0015] In the application, the structural convex rib is arranged in a protruding mode on one side of the window frame connecting piece and in a recessed mode on the other side of the window frame connecting piece and forms an avoiding groove avoiding the second sliding block.

[0016] In the application, one end of the first connecting rod is rotationally connected on the sliding piece by a first shaft piece I, and the other end is rotationally connected on the sash connecting piece by a first shaft piece II; the side of the first connecting rod close to the window frame connecting piece is slidingly contacted with the side of the sliding piece, and the first shaft piece II is externally sleeved with a first gasket between the first connecting rod and the sash connecting piece.

[0017] In the application, one end of the second connecting rod is rotationally connected on the window frame connecting piece by a second shaft piece I, and the other end is rotationally connected on the sash connecting piece by a second shaft piece II.

[0018] In the present application, the second shaft I is sleeved with an isolation pad between the second connecting rod and the window frame connector, and the second shaft II is sleeved with a second gasket between the second connecting rod and the window sash connector; the isolation pad and the second gasket are both made of plastic material.

[0019] In the present application, one end of the third connecting rod is rotatably connected to the window frame connector by a third shaft I, and the other end is rotatably connected to the first connecting rod by a third shaft II, and the third shaft I is located between the first shaft I and the second shaft I.

[0020] In the present application, the third shaft I is sleeved with an isolation pad between the third connecting rod and the window frame connector, and the third shaft II is sleeved with a third gasket between the third connecting rod and the first connecting rod; the isolation pad and the third gasket are both made of plastic material.

[0021] In the present application, the corner cover is provided with a positioning convex shaft, the window frame connector is provided with a positioning insertion hole matched with the positioning convex shaft, the positioning convex shaft is positioned and inserted into the positioning insertion hole, and the corner cover is fixed on the window frame connector by bolts or rivets.

[0022] The present application has the following advantages: by reserving a translation gap, the window sash connector is no longer limited by the corner cover after the guide convex corner enters the guide position of the corner cover, so that the window sash can be translated into the window frame when the window sash connector and the window frame connector are parallel or substantially parallel, and the end of the window sash close to the hinge will not be pressed against the sealing strip close to the hinge in advance, thereby reducing the aging speed of the sealing strip close to the hinge and prolonging the service life of the sealing strip. Moreover, this structure can make the window frame press the sealing strip on the window sash when the window sash is translated into the window frame, so that the contact and sealing effect of the window frame and the sealing strip is better, and the sealing performance of the window sash after being closed is effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0023] The present application will be further described below in combination with the drawings and embodiments:

[0024] Figure 1 It is a perspective view of the present embodiment;

[0025] Figure 2 It is a perspective view of the first hinge and the second hinge and the position distribution of the transmission mechanism;

[0026] Figure 3 It is a perspective view of the first hinge Figure 1 ;

[0027] Figure 4 It is a perspective view of the first hinge Figure 2 ;

[0028] Figure 5 It is a perspective view of the second hinge;

[0029] Figure 6 is the exploded view of the included angle and the window frame connector;

[0030] Figure 7 is the schematic view of the change between the window sash and the window frame when the window sash is switched from the open state to the closed state;

[0031] Figure 8 is the schematic view of the change of the second hinge when the window sash is switched from the open state to the closed state. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application.

[0033] Reference Figures 1-8 A flat-pressed casement window structure, comprising a window sash 1, a window frame 2, a handle 3 installed on the window sash 1, a sealing strip 4 provided on the window sash 1 or / and the window frame 2, the sealing strip 4 being used for sealing when the window sash 1 is closed; the handle 3 is connected with a lock seat 100 through a transmission mechanism 5, two lock seats 100 are respectively arranged on the left and right sides of the window sash 1, the window frame 2 is provided with at least two opposite lock points 200 on the sides, for example, the left and right sides of the window frame 2 are provided with lock points 200, each lock point 200 corresponds to one lock seat 100; of course, it is not limited to the above structure, in other embodiments, the upper side, the lower side, the left side and the right side of the window frame 2 can be provided with lock points 200, and the transmission mechanism 5 is connected with a plurality of lock seats 100, each lock seat 100 corresponds to one lock point 200, so as to further improve the locking quality of the window sash 1.

[0034] Further, the window sash 1 and the window frame 2 are connected by a first hinge 300 and a second hinge 400;

[0035] The first hinge 300 and the second hinge 400 each comprise a first connecting rod 101, a second connecting rod 102, a third connecting rod 103, a window sash connector 104 installed on the window sash 1, a window frame connector 105 installed on the window frame 2,

[0036] The window frame connector 105 is provided with a slidable sliding piece 106, and the two ends of the first connecting rod 101 are respectively rotatably connected with the window sash connector 104 and the sliding piece 106;

[0037] The two ends of the second connecting rod 102 are respectively rotatably connected with the window sash connector 104 and the window frame connector 105;

[0038] One end of the third connecting rod 103 is rotatably connected to the window sash connector 104, and the other end is rotatably connected to the middle part of the first connecting rod 101.

[0039] The sash connecting piece 104 is provided with a guide protrusion 107, and the guide protrusion 107 is provided with a guide connecting part which is connected to the sash connecting piece 104 by means of a bolt or a rivet, so that the guide protrusion 107 is installed. In other embodiments, the guide protrusion 107 can be stamped on the sash connecting piece 104 by means of stamping processing, so that the guide protrusion 107 is integrally formed on the sash connecting piece 104. The window frame connecting piece 105 is provided with a corner 108 having a guide position.

[0040] The guide position is larger than the guide protrusion 107, and when the guide protrusion 107 extends into the guide position, the side surface of the guide protrusion 107 is completely separated from the working surface 1080 of the guide position to form a reserved translation gap for the sash 1 to translate in and out of the window frame 2.

[0041] The process of the casement window structure sash 1 closing and translating into the window frame 2 is as follows: when the sash 1 is closed, the sash 1 is moved towards the window frame 2, and in this process, the first hinge 300 and the second hinge 400 are gradually folded and collected. During the closing process of the sash 1, when the guide protrusion 107 extends into the guide position of the corner 108 and the guide position, the sash connecting piece 104 is parallel or substantially flush with the window frame connecting piece 105, at this time, the side surface of the guide protrusion 107 is completely separated from the working surface 1080 of the guide position to form a reserved translation gap, so that the guide protrusion 107 does not contact the working surface 1080 of the guide position, so that the sash 1 can be pulled to a position parallel or close to parallel to the window frame 2, and at this time, the sash 1 remains in an incomplete closed state. When the handle 3 is rotated to drive the transmission mechanism 5 to drive the lock seat 100 to act, the lock groove of the lock seat 100 gradually fits on the lock point 200, and during the cooperation of the lock seat 100 and the lock point 200, the sash 1 is translated into the window frame 2, until the lock seat 100 and the lock point 200 are completely matched, the sash 1 is pulled and pressed on both ends of the sealing strip 4, and the closing of the sash 1 is completed. Through the reserved translation gap of the above structure, the sash connecting piece 104 is no longer limited by the corner 108 after the guide protrusion 107 enters the guide position of the corner 108, so that the sash 1 can be translated into the window frame 2, and the end of the sash 1 close to the hinge will not be pressed against the sealing strip 4 close to the hinge in advance.

[0042] The process of opening and translating the sash 1 of the casement window structure into the window frame 2 is as follows: when the sash 1 is opened, the handle 3 is rotated to make the transmission mechanism 5 control the lock seat 100 to separate from the lock point 200, and since there is a reserved translation gap, the guide lobe 107 of the sash connecting piece 104 is not limited by the wrap angle 108, so that the sash 1 is pushed to translate slightly under the elastic force of the sealing strip 4 to exit the window frame 2; then the sash 1 is driven to move in the direction away from the window frame 2, and the guide lobe 107 on the sash connecting piece 104 is pushed out in the opening direction by the working surface 1080 of the guide position of the wrap angle 108, so that the hinge is gradually unfolded, and the opening action of the sash 1 is completed.

[0043] As a preferred embodiment, the window frame connecting piece 105 is provided with a guide groove 1051 extending along the transverse direction of the window frame connecting piece 105; the sliding piece 106 comprises a first sliding block 1061, a guide portion and a second sliding block 1062 connected in sequence, the first sliding block 1061 and the second sliding block 1062 are respectively slidably fitted on the opposite sides of the window frame connecting piece 105, and the guide portion is guided and fitted in the guide groove 1051. Through the guide cooperation between the guide portion and the guide groove 1051, the sliding piece 106 can extend along the length direction of the guide groove 1051.

[0044] As a preferred embodiment, the window frame connecting piece 105 is provided with a structural rib 1052 in a punching manner, the guide groove 1051 is arranged on the structural rib 1052 and penetrates through the structural rib 1052, and the structural rib 1052 is used to enhance the position of the corresponding guide groove 1051 of the window frame connecting piece 105. The structural rib 1052 is arranged in a protruding manner on one side of the window frame connecting piece 105 and arranged in a recessed manner on the other side of the window frame connecting piece 105 and forms an avoiding groove avoiding the second sliding block 1062. The first sliding block 1061 is in sliding contact with the protrusion of the structural rib 1052, and through this structure, the area of contact between the sliding piece 106 and the window frame connecting piece 105 can be reduced, so as to achieve the purpose of reducing friction and make the hinge action more smooth.

[0045] As a preferred embodiment, the sliding piece 106 is made of plastic material, wherein the guide portion can be fixedly connected with the first sliding block 1061 in an injection molding manner to ensure the stability between the guide portion and the first sliding block 1061, and the second sliding block 1062 can be combinedly connected with the guide portion and the first sliding block 1061 by means of the bolt of the sliding piece 106.

[0046] As a preferred embodiment, one end of the first connecting rod 101 is rotatably connected to the sliding piece 106 by a first shaft I 109, and the other end is rotatably connected to the sash connecting piece 104 by a first shaft II 110. Further, the side of the first connecting rod 101 close to the frame connecting piece 105 is in sliding contact with one side of the sliding piece 106, and the first shaft II 110 is sleeved with a first gasket between the first connecting rod 101 and the sash connecting piece 104. The first gasket is made of plastic, which separates the first connecting rod 101 and the sash connecting piece 104, so that the first connecting rod 101 does not need to directly slide with the sash connecting piece 104, and the friction is small, making the action of the hinge more smooth. In addition, the first gasket and the sliding piece 106 are both made of plastic, which can effectively reduce the sound when the first connecting rod 101 moves.

[0047] As a preferred embodiment, one end of the second connecting rod 102 is rotatably connected to the frame connecting piece 105 by a second shaft I 112, and the other end is rotatably connected to the sash connecting piece 104 by a second shaft II 113. Further, the second shaft I 112 is sleeved with an isolation pad 115 between the second connecting rod 102 and the frame connecting piece 105, and the second shaft II 113 is sleeved with a second gasket between the second connecting rod 102 and the sash connecting piece 104. The isolation pad 115 and the second gasket are both made of plastic, which separates the second connecting rod 102 from the frame connecting piece 105 and the sash connecting piece 104, so that the second connecting rod 102 does not need to directly slide with the frame connecting piece 105 and the sash connecting piece 104, and the friction is small, making the action of the hinge more smooth. In addition, the isolation pad 115 and the second gasket are both made of plastic, which can effectively reduce the sound when the second connecting rod 102 moves.

[0048] As a preferred embodiment, one end of the third connecting rod 103 is rotatably connected to the window frame connecting piece 105 by a third shaft I 116, and the other end is rotatably connected to the first connecting rod 101 by a third shaft II 117. The third shaft I 116 is located between the first shaft I 109 and the second shaft I 112. Further, the third shaft I 116 is provided with an isolation pad 115 located between the third connecting rod 103 and the window frame connecting piece 105, that is, the second shaft I 112 and one end of the third shaft I 116 pass through the same isolation pad 115; the third shaft II 117 is provided with a third gasket located between the third connecting rod 103 and the first connecting rod 101. The isolation pad 115 and the third gasket are both made of plastic material, which separates the third connecting rod 103 from the window frame connecting piece 105 and the first connecting rod 101, so that the third connecting rod 103 does not need to directly slide in contact with the window frame connecting piece 105 and the first connecting rod 101, the friction is small, and the action of the hinge is more smooth. In addition, the isolation pad 115 and the third gasket are both made of plastic material, which can effectively reduce the sound when the third connecting rod 103 moves.

[0049] As a preferred embodiment, in order to facilitate the positioning and installation of the angle cover 108, the angle cover 108 is provided with a positioning convex shaft 1081, and the window frame connecting piece 105 is provided with a positioning insertion hole 1053 matched with the positioning convex shaft 1081. The positioning convex shaft 1081 is positioned and inserted into the positioning insertion hole 1053, and then a bolt or a rivet is used to fix the angle cover 108 on the window frame connecting piece 105.

[0050] As a preferred embodiment, the second hinge 400 can be used as a lower hinge to provide stable support force for the sash 1; the first hinge 300 is used as an upper hinge and can be connected to the opposite corner transmission of the transmission mechanism 5. The transmission mechanism 5 includes vertically same-side transmission bars, same-side corner transmission, horizontal upper-side transmission bars, opposite corner transmission and vertically opposite-side transmission bars connected in sequence and synchronously connected. At least one lock seat is provided on the same-side transmission bars and the opposite-side transmission bars. The opposite corner transmission is connected to the sash connecting piece 104 of the first hinge 300. The opposite corner transmission used in the present application can refer to the Chinese patent with patent number CN202221851226.9 applied by the applicant in the past. The vertically same-side transmission bars, same-side corner transmission, horizontal upper-side transmission bars, opposite-side transmission bars and other components of the transmission mechanism 5 are all prior art. The structure principle of the transmission mechanism 5 can refer to the Chinese patent with patent number CN202023277758.X and the Chinese patent with patent number CN202023052822.4.

[0051] The above only describes the preferred embodiments of the present application, and any technical solutions that achieve the same purpose by basically the same means are within the protection scope of the present application.

Claims

1. A flat press type casement window structure, comprising a sash (1), a window frame (2), a handle (3) mounted on the sash (1), a sealing strip (4) provided on the sash (1) and / or the window frame (2), the handle (3) being connected with a lock seat (100) through a transmission mechanism (5), and the window frame (2) being provided with lock points (200) on at least two opposite sides thereof; the sash (1) and the window frame (2) are connected through a first hinge (300) and a second hinge (400), the first hinge (300) and the second hinge (400) each comprising a first connecting rod (101), a second connecting rod (102) and a third connecting rod (103), a sash connecting piece (104) mounted on the sash (1), and a window frame connecting piece (105) mounted on the window frame (2), the window frame connecting piece (105) being provided with a sliding piece (106), the two ends of the first connecting rod (101) being rotatably connected with the sash connecting piece (104) and the sliding piece (106) respectively, the two ends of the second connecting rod (102) being rotatably connected with the sash connecting piece (104) and the window frame connecting piece (105) respectively, one end of the third connecting rod (103) being rotatably connected with the sash connecting piece (104), and the other end being rotatably connected with the middle part of the first connecting rod (101), the guiding position being larger than a guiding convex corner (107), when the guiding convex corner (107) extends into the guiding position and the sash connecting piece (104) is parallel or substantially flush with the window frame connecting piece (105), the side surface of the guiding convex corner (107) is completely separated from the working surface (1080) of the guiding position to form a reserved translation gap for the sash (1) to translate into the window frame (2), the process of the sash (1) of the casement window structure closing and translating into the window frame (2) being as follows: when the sash (1) is closed, the sash (1) is driven to move towards the window frame (2), in this process, the first hinge (300) and the second hinge (400) are gradually folded and closed, when the guiding convex corner (107) extends into the guiding position of the angle (108) and the sash connecting piece (104) is parallel or substantially flush with the window frame connecting piece (105), the side surface of the guiding convex corner (107) is completely separated from the working surface (1080) of the guiding position to form a reserved translation gap, the guiding convex corner (107) is not in contact with the working surface (1080) of the guiding position, the sash (1) can be pulled to a position parallel or close to parallel with the window frame (2), and at this time, the sash (1) remains in an incomplete closed state, when the handle (3) is rotated to drive the transmission mechanism (5) to drive the lock seat (100) to act, the lock groove of the lock seat (100) gradually fits on the lock point (200), and in the process of cooperation between the lock seat (100) and the lock point (200), the sash (1) is translated into the window frame (2), until the lock seat (100) and the lock point (200) are completely matched, the sash (1) is pulled and pressed on both ends of the sealing strip (4), and the closing of the sash (1) is completed. ​ ​ ​ ​ The sash connecting piece (104) is provided with a guide convex corner (107), and the window frame connecting piece (105) is provided with a corner (108) with a guide position. ​ ​ The process that the sash (1) of the casement window structure is opened and translated to exit into the window frame (2) is as follows: when the sash (1) is opened, the handle (3) is rotated, the transmission mechanism (5) controls the lock seat (100) and the lock point (200) to separate, because there is a reserved translation gap, the guide lobe (107) of the sash connecting piece (104) is not limited by the wrap angle (108), the sash (1) is pushed to occur a slight translation to exit the window frame (2) under the elastic force of the sealing strip (4); then the sash (1) is driven to move in the direction of leaving the window frame (2), the guide lobe (107) on the sash connecting piece (104) is pushed out by the working surface (1080) of the wrap angle (108) guide position in the opening direction, the hinge is gradually unfolded, and the opening action of the sash (1) is completed.

2. A flush casement window structure according to claim 1, characterized in that: The window frame connecting piece (105) is provided with a guide groove (1051), the sliding piece (106) comprises a first sliding block (1061), a guide portion and a second sliding block (1062) connected in sequence, the first sliding block (1061) and the second sliding block (1062) are respectively slidably fitted on the opposite sides of the window frame connecting piece (105), and the guide portion is guided and fitted in the guide groove (1051).

3. A flush casement window structure according to claim 2, wherein: The window frame connecting piece (105) is provided with a structure rib (1052) in a stamping mode, the guide groove (1051) is arranged on the structure rib (1052) and penetrates through the structure rib (1052), and the structure rib (1052) is used for enhancing the position of the corresponding guide groove (1051) of the window frame connecting piece (105).

4. A flush casement window structure as claimed in claim 3 wherein: The structure rib (1052) is arranged in protrusion on one side of the window frame connecting piece (105) and in recess on the other side of the window frame connecting piece (105) and forms an avoiding groove avoiding the second sliding block (1062).

5. The flush casement window structure according to claim 1, wherein: One end of the first connecting rod (101) is rotatably connected to the sliding piece (106) in a first shaft piece I (109), and the other end is rotatably connected to the sash connecting piece (104) in a first shaft piece II (110); one side of the first connecting rod (101) close to the window frame connecting piece (105) is in sliding contact with one side of the sliding piece (106), and the first shaft piece II (110) is externally sleeved with a first gasket between the first connecting rod (101) and the sash connecting piece (104).

6. A flush casement window structure as claimed in claim 5 wherein: One end of the second connecting rod (102) is rotatably connected to the window frame connecting piece (105) in a second shaft piece I (112), and the other end is rotatably connected to the sash connecting piece (104) in a second shaft piece II (113).

7. A flush casement window structure as claimed in claim 6 wherein: The second shaft piece I (112) is externally sleeved with an isolation pad block (115) between the second connecting rod (102) and the window frame connecting piece (105), and the second shaft piece II (113) is externally sleeved with a second gasket between the second connecting rod (102) and the sash connecting piece (104); the isolation pad block (115) and the second gasket are both made of plastic material.

8. The flush casement window structure according to claim 1, wherein: One end of the third connecting rod (103) is rotatably connected to the window frame connecting piece (105) by a third shaft member I (116), and the other end is rotatably connected to the first connecting rod (101) by a third shaft member II (117), and the third shaft member I (116) is located between the first shaft member I (109) and the second shaft member I (112).

9. A flush casement window structure as claimed in claim 8 wherein: The third shaft member I (116) is sleeved with an isolation pad block (115) located between the third connecting rod (103) and the window frame connecting piece (105), and the third shaft member II (117) is sleeved with a third gasket located between the third connecting rod (103) and the first connecting rod (101), and the isolation pad block (115) and the third gasket are both made of plastic material.

10. The flush casement window structure according to claim 1, wherein: The corner (108) is provided with a positioning convex shaft (1081), and the window frame connecting piece (105) is provided with a positioning insertion hole (1053) matched with the positioning convex shaft (1081), the positioning convex shaft (1081) is positioned and inserted into the positioning insertion hole (1053), and the corner (108) is fixed on the window frame connecting piece (105) by bolts or rivets.

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