Door and window

Abstract

The invention provides a door and window which comprises a fixed frame, a door and window sash, a first sliding opening and closing mechanism installed between the lower end of the door and window sash and the fixed frame and a second sliding opening and closing mechanism installed between the upper end of the door and window sash and the fixed frame, and the door and window sash is installed on the fixed frame through the first sliding opening and closing mechanism and the second sliding opening and closing mechanism. Each of the first sliding opening and closing mechanism and the second sliding opening and closing mechanism comprises a rail arranged on a fixed frame transverse profile of the fixed frame, a pulley assembly slidably arranged on the rail and a rotating arm, the rotating arm comprises a fixed frame connecting end and a door and window sash connecting end, the fixed frame connecting end is hinged to the pulley assembly, and the door and window sash connecting end is hinged to the fixed frame connecting end. The door and window sash connecting end is hinged to the end of the door and window sash, the door and window sash can be opened backwards through rotation of the rotating arm, the door and window sash comprises a door and window sash connecting piece, a connecting piece mounting hole for containing and fixing the door and window sash connecting piece is formed in the outer side face of a sash frame transverse profile of the door and window sash, and the door and window sash connecting end of the rotating arm is hinged to the door and window sash connecting piece.

Description

Technical Field

[0001] This invention relates to the field of door and window technology, and in particular to a door and window. Background Technology

[0002] Doors and windows are classified into several types based on their opening mechanism, including casement, sliding, inward-opening sliding, and tilt-and-turn. Inward-opening sliding doors and windows allow the sash to move parallel to the fixed frame inwards a suitable distance to create a gap for ventilation, while also allowing the sash to slide left and right relative to the frame to open and close. Typically, an inward-opening sliding door or window includes: a fixed frame, a slidably mounted sash on the fixed frame, and a sliding opening / closing mechanism installed between the end of the sash and the fixed frame. The sash is mounted to the fixed frame via this mechanism. The sliding opening / closing mechanism includes a track on the horizontal profile of the fixed frame, a pulley assembly slidably mounted on the track, and a rotating arm. The rotating arm has a fixed frame connection end and a sash connection end. The fixed frame connection end is hinged to the pulley assembly, and the sash connection end is hinged to the end of the sash. Rotation of the rotating arm allows the sash to open horizontally relative to the fixed frame. However, the aforementioned existing technology has the following drawbacks: when the rotating arm of the sliding opening and closing mechanism is hinged to the end of the door or window sash, it is hinged to the corner bracket of the door or window sash frame, which requires machining a hinge structure on the corner bracket. The corner bracket is a connecting component that connects the horizontal and vertical profiles of the door or window frame and needs to have a certain strength. Machining a hinge structure on the corner bracket weakens its strength, thus weakening the overall strength of the door or window sash. Summary of the Invention

[0003] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a door and window that can ensure the strength of the door and window sash.

[0004] To achieve the above objectives, the present invention provides a door and window, comprising a fixed frame, a door / window sash slidably mounted on the fixed frame, a first sliding opening and closing mechanism mounted between the lower end of the door / window sash and the fixed frame, and a second sliding opening and closing mechanism mounted between the upper end of the door / window sash and the fixed frame. The door / window sash is mounted on the fixed frame via the first and second sliding opening and closing mechanisms. Both the first and second sliding opening and closing mechanisms include a track disposed on a horizontal profile of the fixed frame, and a slidably disposed track. A pulley assembly and a rotating arm are placed on the track. The rotating arm includes a fixed frame connecting end and a door / window sash connecting end. The fixed frame connecting end is hinged to the pulley assembly, and the door / window sash connecting end is hinged to the end of the door / window sash. Rotation of the rotating arm allows the door / window sash to open rearward relative to the fixed frame. The door / window sash includes a door / window sash connector. A connector mounting hole is provided on the outer side of the lower side frame horizontal profile of the door / window sash to receive and fix the door / window sash connector. The door / window sash connecting end of the rotating arm is hinged to the door / window sash connector. Thus, by providing a door / window sash connector hinged to the door / window sash connecting end of the rotating arm and fixing the door / window sash connector to the higher-strength lower side frame horizontal profile of the door / window sash, the strength of the door / window sash can be ensured, thereby guaranteeing the overall quality of the door / window.

[0005] The preferred embodiment of the above technical solution is as follows: When viewed from the front-back direction, the door and window sash connector is stepped. The first step of the door and window sash connector is formed by the fixing arms on both sides of the lower end of the door and window sash connector. The fixing arms are provided with a first fixing through hole. The outer profile of the lower sash frame profile is provided with a first profile fixing hole. The fixing arms abut against the outer profile. The first step is fixed to the outer profile through the connector, the first fixing through hole and the first profile fixing hole. The second step of the door and window sash connector is located above the first step. In the left-right direction, the length of the second step is less than the length of the first step. The second fixing through holes are provided on the left and right sides of the second step. The inner profile of the lower sash frame profile is provided with a second profile fixing hole. The upper surface of the second step abuts against the inner profile. The second step is fixed to the inner profile through the connector, the second fixing through hole and the second profile fixing hole.

[0006] The door and window provided in this application adopts a stepped door and window sash connector, and the first step and the second step of the door and window sash connector are respectively fixed to the outer profile and the inner profile of the lower sash frame horizontal profile. In this way, through the double-layer fixing structure, the door and window sash connector can be firmly fixed to the lower sash frame horizontal profile, further enhancing the strength of the door and window sash.

[0007] A preferred embodiment of the above technical solution is as follows: a blind hole is provided between the two second fixed through holes of the second step, and a hinge structure is provided in the blind hole. The door / window sash connecting end of the rotating arm is hinged to the door / window sash connecting member through the hinge structure. Thus, by providing a blind hole in the door / window sash connecting member, and the door / window sash connecting end of the rotating arm is hinged to the door / window sash connecting member through the hinge structure provided in the blind hole, the hinge strength between the rotating arm and the door / window sash connecting member can be improved, further enhancing the overall strength of the door and window.

[0008] A preferred embodiment of the above technical solution is as follows: the hinge structure includes a bearing, an annular base, an open ring, a hinge shaft, and a cover plate. The annular base includes a first hole and a second hole coaxially arranged along the axial direction of the annular base. The diameter of the second hole is larger than the diameter of the first hole and the inner diameter of the bearing. The open ring is housed in the second hole. The inner diameter of the open ring is smaller than the diameter of the hinge shaft. The outer diameter of the open ring is larger than the diameter of the first hole and the inner diameter of the bearing. The cover plate is fixed to the lower end of the door / window sash connector to prevent the bearing, the annular base, and the open ring from coming out of the blind hole. The cover plate has an opening coaxial with the bearing and the annular base. The hinge shaft is disposed in the opening, the bearing, and the annular base. An annular groove is provided on the outer surface of the hinge shaft at a position corresponding to the open ring. The open ring is located in the annular groove. With the above structure, the open ring can elastically deform in its radial direction due to its opening. During the process of passing the hinge shaft through the openings of the bearing, the annular base, the open ring, and the cover plate, the open ring elastically opens outward when it contacts the outer surface of the hinge shaft except for the annular groove. When the annular groove of the hinge shaft moves to the position of the open ring, the elastic deformation of the open ring recovers inward and is locked into the annular groove, thereby fixing the hinge shaft axially.

[0009] A preferred embodiment of the above technical solution is that there are two bearings, and the annular base is located between the two bearings. This makes the axial fixation of the hinge shaft more stable.

[0010] A preferred embodiment of the above technical solution is as follows: the door and window sash connector further includes a third step disposed above the second step, and the blind hole extends into the third step. By providing the third step, the length of the blind hole can be extended, thereby increasing the space for setting the hinge structure. This improves the hinge strength between the rotating arm and the door and window sash connector, further enhancing the overall strength of the door and window.

[0011] A preferred embodiment of the above technical solution is as follows: both the bearing and the annular base are clearance-fitted with the blind hole, and the hinge shaft is clearance-fitted with both the bearing and the first hole. This improves the hinge strength between the rotating arm and the door / window sash connector, further enhancing the overall strength of the door / window.

[0012] A preferred embodiment of the above technical solution is as follows: the end of the hinge shaft inserted into the door / window sash connector has a chamfered portion. When the hinge shaft passes through the opening ring, the chamfered portion of the hinge shaft presses against the opening ring and causes the opening ring to elastically open outward. The chamfered portion of the hinge shaft can act as a guide, making it easier for the hinge shaft to pass through the opening and opening ring on the cover plate.

[0013] A preferred embodiment of the above technical solution is as follows: the cover plate is provided with two third fixing through holes, which are respectively aligned with two second fixing through holes, or respectively aligned with two first fixing through holes. Thus, when the two third fixing through holes are aligned with the two second fixing through holes, the cover plate can be fixed to the lower end of the door / window sash connector while the second step of the door / window sash connector is fixed to the inner profile via the connector, the second fixing through holes, and the second profile fixing holes; when the two third fixing through holes are aligned with the two first fixing through holes, the cover plate can be fixed to the lower end of the door / window sash connector while the first step is fixed to the outer profile via the connector, the first fixing through holes, and the first profile fixing holes.

[0014] The preferred embodiment of the above technical solution is as follows: two door and window sash connectors are provided, located on both sides of the lower side frame horizontal profile of the door and window sash. By hinged to the two rotating arms on both sides of the lower side frame horizontal profile, the door and window sash can be subjected to uniform force, further enhancing the overall strength of the door and window.

[0015] As described above, the door and window of the present invention has the following beneficial effects: by setting a door and window sash connector that is hinged to the door and window sash connecting end of the rotating arm, and fixing the door and window sash connector to the lower side sash frame horizontal profile with higher strength in the door and window sash, the strength of the door and window sash can be ensured, thus guaranteeing the overall quality of the door and window. Attached Figure Description

[0016] Figure 1 This is an interior front view of the doors and windows in this application, in which the door and window sashes are in a closed state.

[0017] Figure 2 This is a perspective view of the doors and windows in this application, in which the door and window sashes are in the open state.

[0018] Figure 3 This is a schematic diagram of the track, pulley assembly, and rotating arm installed on the horizontal profile of the fixed frame when the door and window sash of the door and window in this application are closed.

[0019] Figure 4 This is a schematic diagram of the track, pulley assembly, and rotating arm installed on the horizontal profile of the fixed frame when the door / window sash of the door / window in this application is opened.

[0020] Figure 5 This is a perspective view of the door and window sashes in this application.

[0021] Figure 6 This is a schematic diagram of the structure for installing door and window sash connectors on the horizontal profile of the door and window sash frame in this application.

[0022] Figure 7 for Figure 6 A sectional view along line AA.

[0023] Figure 8 This is a schematic diagram of the assembly of the pulley assembly, rotating arm, and door / window sash connector of the door and window in this application.

[0024] Figure 9 This is a top view of the assembly of the pulley assembly, rotating arm, and door / window sash connector of the door / window in this application.

[0025] Figure 10 for Figure 9 BB-direction sectional view.

[0026] Figure 11 This is an exploded view of the door and window sash connectors in this application.

[0027] Figure 12 This is an axial sectional view of the annular base of the door and window in this application.

[0028] Component designation explanation

[0029] 10 Fixed frame

[0030] 110 Lower side fixed frame horizontal profile

[0031] 20 Door and window panels

[0032] 201 Door and window sash connectors

[0033] 201A Fixed Arm

[0034] 201B First Fixed Through Hole

[0035] 201C Second Fixed Through Hole

[0036] 201D Blind Hole

[0037] 202 Connector

[0038] 203 bearing

[0039] 204 Annular Base

[0040] 204A First Hole

[0041] 204B Second Hole

[0042] 205 Open Ring

[0043] 206 Hinged Shaft

[0044] 206A Annular Groove

[0045] 207 Cover Plate

[0046] 207A opening

[0047] 207B Third Fixed Through Hole

[0048] 21-sector frame

[0049] 210 Lower side fan frame horizontal profile

[0050] 211 Outer profile

[0051] 211A First Profile Fixing Hole

[0052] 212 Inner profile

[0053] 212A Second Profile Fixing Hole

[0054] 213 Connector mounting holes

[0055] 22 Window sash panel

[0056] 30 First sliding opening and closing mechanism

[0057] 31 orbits

[0058] 32 Pulley Assembly

[0059] 33 Rotating arm

[0060] 331 Fixed frame connection end

[0061] 332 Door and window sash connection end

[0062] 40 Handle Lock Mechanism Detailed Implementation

[0063] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0064] It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and to facilitate understanding. They are not intended to limit the scope of the invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and objectives of the invention, should still fall within the scope of the technical content disclosed herein. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention's implementation.

[0065] It should also be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or may be connected to an intermediary component. When a component is referred to as being "connected to" another component, it can be directly connected to the other component or indirectly connected to the other component through an intermediary component.

[0066] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

[0067] like Figure 1 and Figure 2 As shown, this application provides a door and window, including a fixed frame 10, a door / window sash 20, a first sliding opening and closing mechanism 30, a second sliding opening and closing mechanism, and a handle lock mechanism 40. For ease of description, in the following embodiments, the directions are defined as follows: the width direction of the door / window is defined as the left-right direction, the height direction is defined as the up-down direction, and the thickness direction is defined as the front-back direction. The thickness direction of the door / window is also the indoor / outdoor direction, with the outdoor side being the front direction and the indoor side being the rear direction. Based on this, Figure 1 In the view shown, the left and right sides of the paper are the left and right directions, the top and bottom sides are the top and bottom directions, and the front and back sides are the back and front directions.

[0068] like Figures 1 to 4As shown, the fixed frame 10 is fixed to the opening of the building and includes horizontal fixed frame profiles extending left and right and vertical fixed frame profiles extending up and down. The horizontal fixed frame profiles include an upper fixed frame horizontal profile and a lower fixed frame horizontal profile 110, and the vertical fixed frame profiles include a left fixed frame vertical profile and a right fixed frame vertical profile. The door / window sash 20 is slidably installed on the fixed frame 10 via a first sliding opening and closing mechanism 30 and a second sliding opening and closing mechanism. The first sliding opening and closing mechanism 30 is installed between the lower end of the door / window sash 20 and the fixed frame 10, and the second sliding opening and closing mechanism is installed between the upper end of the door / window sash 20 and the fixed frame 10. The window sash 20 includes a sash frame 21 and a sash panel 22 within the sash frame 21. The sash frame 21 includes horizontal sash frame profiles extending to the left and right and vertical sash frame profiles extending to the top and bottom. The horizontal sash frame profiles include an upper sash frame profile and a lower sash frame profile 210. The vertical sash frame profiles include a left sash frame profile and a right sash frame profile. The sash panel 22 is usually made of glass.

[0069] Figures 1 to 4 (in Figure 3 and Figure 4 (The fixed frame horizontal profile is omitted in the text.) Taking the first sliding opening and closing mechanism 30 as an example, the basic structures of the first sliding opening and closing mechanism 30 and the second sliding opening and closing mechanism are shown. Both the first sliding opening and closing mechanism 30 and the second sliding opening and closing mechanism include a track 31 set on the fixed frame horizontal profile of the fixed frame 10, a pulley assembly 32 slidably set on the track 31, and a rotating arm 33. The track 31 extends in the left and right direction on the fixed frame horizontal profile. The pulley assembly 32 can slide left and right along the track 31. The rotating arm 33 includes a fixed frame connecting end 331 and a door / window sash connecting end 332. The fixed frame connecting end 331 is hinged to the pulley assembly 32, and the door / window sash connecting end 332 is hinged to the end of the door / window sash 20. Thus, the opening and sliding operation of the door and window sash 20 is as follows: Rotate the handle lock mechanism 40 to put the door and window sash 20 in the unlocked state, pull the handle lock mechanism 40 backward to make the door and window sash 20 move backward parallel to the fixed frame 10. At this time, the door and window sash 20 moves backward away from the fixed frame 10, and at the same time drives the rotating arm 33 to rotate backward to a predetermined angle with the hinge point between the fixed frame connection end 331 and the pulley assembly 32 as the rotation center. Then a certain distance gap is formed between the door and window sash 20 and the fixed frame 10. The state of the door and window at this time is defined as the ventilation state. When it is necessary to further open the door and window sash 20, push the door and window sash 20 to the left. At this time, the leftward pushing force on the door and window sash 20 is transmitted to the pulley assembly 32 through the rotating arm 33. Then the pulley assembly 32 drives the door and window sash 20 to move to the left, and the door and window sash 20 is further opened. The state of the door and window at this time is defined as the open state. In this embodiment, the door / window sash 20 is configured to slide to the left to become open. In other embodiments, the door / window sash 20 may also be configured to slide to the right to become open.

[0070] like Figure 5 and Figure 6 As shown, the door / window sash 20 includes a door / window sash connector 201. A connector mounting hole 213 is provided on the outer surface of the lower side frame profile 210 of the door / window sash 20 to receive and fix the door / window sash connector 201. The door / window sash connecting end 332 of the rotating arm 33 is hinged to the door / window sash connector 201. Figure 12 In the lower sash frame horizontal profile 210, the left side of the outer side shows the connector mounting hole 213 when the door / window sash connector 201 is not installed, and the right side shows the door / window sash connector 201 installed in the connector mounting hole 213. Thus, by providing the door / window sash connector 201 hinged to the door / window sash connecting end 332 of the rotating arm 33, and fixing the door / window sash connector 201 to the high-strength lower sash frame horizontal profile 210 in the door / window sash 20, the strength of the door / window sash 20 can be ensured, thereby guaranteeing the overall quality of the door / window.

[0071] Furthermore, such as Figure 7 As shown, the lower side frame profile 210 for fixing the door and window sash connector 201 includes: an outer profile 211 whose lower surface serves as the lower outer surface of the door and window sash 20, and an inner profile 212 located above the outer profile 211. The specific structure of the door and window sash connector 201 is as follows: When viewed from the front and back, the door and window sash connector 201 is stepped. The first step of the door and window sash connector 201 is formed by the fixing arms 201A on both sides of the lower end of the door and window sash connector 201. The fixing arms 201A are provided with a first fixing through hole 201B. The outer profile 211 of the lower sash frame horizontal profile 210 is provided with a first profile fixing hole 211A. When the door and window sash connector 201 is inserted into the connector mounting hole 213, the fixing arms 201A abut against the lower surface of the outer profile 211. The first step is fixed to the outer profile 211 through the connector 202, the first fixing through hole 201B and the first profile fixing hole 211A. The second step of the door / window sash connector 201 is located above the first step. In the left-right direction, the length of the second step is less than the length of the first step. Second fixing through holes 201C are respectively provided on the lower surface of the door / window sash connector 201 and the upper surface of the second step on both the left and right sides of the second step. A second profile fixing hole 212A is provided on the inner profile 212 of the lower sash frame horizontal profile 210. When the door / window sash connector 201 is inserted into the connector mounting hole 213, the upper surface of the second step abuts against the lower surface of the inner profile 212. The second step is fixed to the inner profile 212 through the connector 202, the second fixing through hole 201C, and the second profile fixing hole 212A. The connector 202 can be, for example, a screw or rivet, and the door / window sash connector 201 is fixed to the lower sash frame horizontal profile 210 through threaded connection or riveting.

[0072] The door and window provided in this application adopts a stepped door and window sash connector 201, and the first step and the second step of the door and window sash connector 201 are respectively fixed to the outer profile 211 and the inner profile 212 of the lower sash frame horizontal profile 210. In this way, through the double-layer fixing structure, the door and window sash connector 201 can be firmly fixed to the lower sash frame horizontal profile 210, further enhancing the strength of the door and window sash 20.

[0073] Furthermore, such as Figure 7 and Figure 10 As shown, a blind hole 201D is provided between the two second fixed through holes 201C on the second step of the door and window sash connector 201, penetrating downwards through the lower surface of the door and window sash connector 201. A hinge structure is provided in the blind hole 201D, and the door and window sash connecting end 332 of the rotating arm 33 is hinged to the door and window sash connector 201 through the hinge structure. Thus, by providing the blind hole 201D in the door and window sash connector 201, and by hinged to the door and window sash connector 201 through the hinge structure in the blind hole 201D, the hinge strength between the rotating arm 33 and the door and window sash connector 201 can be improved, further enhancing the overall strength of the door and window.

[0074] Furthermore, such as Figures 10 to 12 As shown, the hinge structure includes a bearing 203, an annular base 204, an open ring 205, a hinge shaft 206, and a cover plate 207. The annular base 204 includes a first hole 204A and a second hole 204B coaxially arranged along the axial direction of the annular base 204. The diameter of the second hole 204B is larger than the diameter of the first hole 204A and the inner diameter of the bearing 203. The open ring 205 is received in the second hole 204B. The inner diameter of the open ring 205 is smaller than the diameter of the hinge shaft 206, and the outer diameter of the open ring 205 is larger than the diameter of the first hole 204A. The cover plate 207 is fixed to the lower end of the door / window sash connector 201, and is the inner diameter of the bearing 203. It is used to prevent the bearing 203, the annular base 204, and the open ring 205 from dislodging from the blind hole 201D. The cover plate 207 has an opening 207A coaxial with the bearing 203 and the annular base 204. The hinge shaft 206 is disposed in the opening 207A, the bearing 203, and the annular base 204. An annular groove 206A is provided on the outer surface of the hinge shaft 206 at a position corresponding to the open ring 205, and the open ring 205 is located in the annular groove 206A. The bearing 203 is preferably a needle roller bearing. Furthermore, the end of the hinge shaft 206 not inserted into the door / window sash connector 201 is fixedly connected to the door / window sash connecting end 332 of the rotating arm 33, preferably by a threaded connection.

[0075] The method for installing the hinge structure in the blind hole 201D is as follows: place the open ring 205 in the second hole 204B of the annular base 204, then arrange the bearing 203 and the annular base 204 containing the open ring 205 along the axial direction of the blind hole 201D and place them in the blind hole 201D, then fix the cover plate 207 to the lower end of the door and window sash connector 201, and finally insert the hinge shaft 206 from the lower end of the door and window sash connector 201 into the opening 207A of the cover plate 207, the bearing 203, the annular base 204 and the open ring 205, and position the open ring 205 in the annular groove 206A. Because of its opening, the open ring 205 can elastically deform in its radial direction. During the process of passing the hinge shaft 206 through the opening 207A of the bearing 203, the annular base 204, the open ring 205, and the cover plate 207, the open ring 205 elastically opens outward when it contacts the outer surface of the hinge shaft 206 except for the annular groove 206A. When the annular groove 206A of the hinge shaft 206 moves to the position of the open ring 205, the elastic deformation of the open ring 205 returns inward and is locked into the annular groove 206A, thereby axially fixing the hinge shaft 206.

[0076] Furthermore, within the blind hole 201D, the bearing 203, the annular base 204, and the open ring 205 can be arranged in various ways. Figure 10 One preferred arrangement is provided in which there are two bearings 203, with an annular base 204 located between the two bearings 203. This makes the axial fixation of the hinge shaft 206 more stable. In other embodiments, for example, a single bearing 203 may be provided, with the annular base 204 housing the open ring 205 located above or below the bearing 203.

[0077] Furthermore, such as Figure 7 and Figure 10 As shown, the door and window sash connector 201 also includes a third step disposed above the second step, and the blind hole 201D extends into the third step. By providing the third step, the length of the blind hole 201D can be extended, which can increase the space for setting the hinge structure, thereby improving the hinge strength between the rotating arm 33 and the door and window sash connector 201, and further enhancing the overall strength of the door and window.

[0078] Furthermore, both the bearing 203 and the annular base 204 are clearance-fitted with the blind hole 201D, and the hinge shaft 206 is clearance-fitted with the bearing 203 and the first hole 204A. This improves the hinge strength between the rotating arm 33 and the door / window sash connector 201, further enhancing the overall strength of the door / window.

[0079] Furthermore, such as Figure 10 and Figure 11As shown, the end of the hinge shaft 206 inserted into the door / window sash connector 201 has a chamfered portion. When the hinge shaft 206 passes through the opening 207A of the cover plate 207, the chamfered portion of the hinge shaft 206 can act as a guide, making it easy for the hinge shaft 206 to pass through the opening 207A. When the hinge shaft 206 passes through the open ring 205, the chamfered portion of the hinge shaft 206 presses against the open ring 205 and causes the open ring 205 to elastically open outward.

[0080] Furthermore, such as Figure 7 and Figure 11 As shown, the cover plate 207 is provided with two third fixing through holes 207B, which are respectively aligned with two second fixing through holes 201C, or the two third fixing through holes 207B are respectively aligned with two first fixing through holes 201B. Thus, when the two third fixing through holes 207B are aligned with the two second fixing through holes 201C respectively, the second step of the door and window sash connector 201 can be fixed to the inner profile 212 through the connector 202, the second fixing through hole 201C, and the second profile fixing hole 212A, while the cover plate 207 is fixed to the lower end of the door and window sash connector 201. When the two third fixing through holes 207B are aligned with the two first fixing through holes 201B respectively, the first step can be fixed to the outer profile 211 through the connector 202, the first fixing through hole 201B, and the first profile fixing hole 211A, while the cover plate 207 is fixed to the lower end of the door and window sash connector 201.

[0081] Furthermore, such as Figure 5 and Figure 6 As shown, there are two door and window sash connectors 201, located on both sides of the lower side frame horizontal profile of the door and window sash 20. By hinged to the two rotating arms on both sides of the lower side frame horizontal profile of the door and window sash connectors 201, the door and window sash can be subjected to uniform force, further enhancing the overall strength of the door and window.

[0082] In summary, this invention effectively overcomes the various shortcomings of the prior art and has high industrial application value.

[0083] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A door and window comprising a fixed frame (10), a door and window leaf (20) slidably mounted to the fixed frame (10), a first sliding opening and closing mechanism (30) mounted between the lower end of the door and window leaf (20) and the fixed frame (10), and a second sliding opening and closing mechanism mounted between the upper end of the door and window leaf (20) and the fixed frame (10), the door and window leaf (20) being mounted to the fixed frame (10) through the first and second sliding opening and closing mechanisms, each of the first and second sliding opening and closing mechanisms comprising a track (31) provided on a fixed frame horizontal profile of the fixed frame (10), a pulley assembly (32) slidably provided on the track (31), and a rotating arm (33), the rotating arm (33) comprising a fixed frame connecting end (331) and a door and window leaf connecting end (332), the fixed frame connecting end (331) being hingedly connected to the pulley assembly (32), and the door and window leaf connecting end (332) being hingedly connected to the end of the door and window leaf (20), the door and window leaf (20) being capable of being opened backward relative to the fixed frame (10) through rotation of the rotating arm (33), characterized in that: the door and window leaf (20) comprises a door and window leaf connecting piece (201), a connecting piece mounting hole (213) for accommodating and fixing the door and window leaf connecting piece (201) being provided on the outer side of a door and window leaf horizontal profile (210) of the door and window leaf (20), and the door and window leaf connecting end (332) of the rotating arm (33) being hingedly connected to the door and window leaf connecting piece (201). The door and window leaf connecting piece (201) is in a stepped shape when viewed from the front and back, 2. The door and window according to claim 1, characterized in that: a first step of the door and window leaf connecting piece (201) is formed by fixed arm portions (201A) on both sides of the lower end of the door and window leaf connecting piece (201), a first fixed through hole (201B) is provided on the fixed arm portions (201A), a first profile fixed hole (211A) is provided on an outer side profile (211) of the door and window leaf horizontal profile (210), the fixed arm portions (201A) abut against the outer side profile (211), and the first step is fixed to the outer side profile (211) through the connecting piece (202), the first fixed through hole (201B) and the first profile fixed hole (211A), a second step of the door and window leaf connecting piece (201) is located above the first step, the length of the second step is smaller than that of the first step in the left and right directions, second fixed through holes (201C) are respectively provided on both sides of the second step, a second profile fixed hole (212A) is provided on an inner side profile (212) of the door and window leaf horizontal profile (210), the upper surface of the second step abuts against the inner side profile (212), and the second step is fixed to the inner side profile (212) through the connecting piece (202), the second fixed through holes (201C) and the second profile fixed hole (212A). ​ 3. The door or window according to claim 2, characterized in that: A blind hole (201D) is arranged between the two second fixed through holes (201C) of the second step, and a hinge structure is arranged in the blind hole (201D), and the door and window leaf connecting end (332) of the rotating arm (33) is hinged to the door and window connecting piece (201) through the hinge structure.

4. The door or window according to claim 3, characterized in that: The hinge structure comprises a bearing (203), an annular base (204), an open ring (205), a hinge shaft (206) and a cover plate (207), The annular base (204) comprises a first hole portion (204A) and a second hole portion (204B) coaxially arranged along the axial direction of the annular base (204), the diameter of the second hole portion (204B) is greater than the diameter of the first hole portion (204A) and the inner diameter of the bearing (203), the open ring (205) is accommodated in the second hole portion (204B), the inner diameter of the open ring (205) is smaller than the diameter of the hinge shaft (206), and the outer diameter of the open ring (205) is greater than the diameter of the first hole portion (204A) and the inner diameter of the bearing (203), The cover plate (207) is fixed at the lower end of the door and window connecting piece (201), and is used for preventing the bearing (203), the annular base (204) and the open ring (205) from being pulled out of the blind hole (201D), and an opening (207A) coaxial with the bearing (203) and the annular base (204) is arranged on the cover plate (207), The hinge shaft (206) is arranged in the opening (207A), the bearing (203) and the annular base (204), and an annular groove (206A) is arranged on the outer surface of the hinge shaft (206) at a position corresponding to the open ring (205), and the open ring (205) is located in the annular groove (206A).

5. The door or window according to claim 4, characterized in that: The bearing (203) has two, and the annular base (204) is located between the two bearings (203).

6. The door or window according to claim 5, characterized in that: The door and window connecting piece (201) further comprises a third step arranged above the second step, and the blind hole (201D) extends into the third step.

7. The door or window according to claim 6, characterized in that: The bearing (203) and the annular base (204) are in clearance fit with the blind hole (201D), and the hinge shaft (206) is in clearance fit with the bearing (203) and the first hole portion (204A).

8. The door or window according to claim 6, characterized in that: The end portion of the hinge shaft (206) on one side of the door and window connecting piece (201) is provided with a chamfered portion, When the hinge shaft (206) passes through the open ring (205), the chamfered portion of the hinge shaft (206) extrudes the open ring (205) and elastically expands the open ring (205) outward.

9. The door or window according to claim 6, characterized in that: The cover plate (207) is provided with two third fixed through holes (207B), and the two third fixed through holes (207B) are respectively aligned with the two second fixed through holes (201C), or the two third fixed through holes (207B) are respectively aligned with the two first fixed through holes (201B).

10. The door or window according to any one of claims 1 to 9, characterized in that: The door and window leaf connecting piece (201) is provided with two, respectively located at both sides of the lower side leaf frame horizontal section of the door and window leaf (20).

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