Hinge of inward-turning window and inward-turning window

Abstract

The present invention discloses a hinge for an inward-opening tilt window and an inward-opening tilt window, comprising a first hinge seat, a second hinge seat, a first hinge plate, a second hinge plate, an elastic component, and an inward-opening tilt member. The first hinge plate and the second hinge plate are cross-hinged; the other end of the second hinge plate is hinged to one end of the elastic component; the other end of the elastic component is hinged to the second hinge seat and forms a third hinge end; the first hinge end and the second hinge end are spaced apart; one end of the inward-opening tilt member forms a connecting end, and the other end of the inward-opening tilt member forms a swinging end; an abutment plate is protruded from the outer surface of the inward-opening tilt member; the connecting end is connected to the second hinge seat; a swinging groove is provided in the first hinge plate, and the swinging end is connected to the swinging groove and can swing around a vertical axis; the abutment plate is used to abut the bottom end surface of the second hinge seat. The inward-opening tilt window comprises an outer frame, an inner frame, and the hinge. The inward-opening force point of the present invention can be attached to the window frame to increase strength.

Description

Technical Field

[0001] The present invention relates to the technical field of doors and windows, and in particular to a hinge for an inward-opening and tilting window and the inward-opening and tilting window. Background Art

[0002] Currently, casement-tilt windows can be positioned in three different positions: locked (handle vertically downward), casement (handle horizontal), or tilt (handle vertically upward) by rotating the window handle. Existing tilt-and-turn windows are supported by a hinge when the inner window is opened outward. When the inner window is opened inward, the inner window slides and rotates relative to the hinge. This fulcrum for opening the window rests on the hinge, resulting in insufficient support strength. Summary of the Invention

[0003] In order to overcome the deficiencies of the prior art, one of the objects of the present invention is to provide a hinge for an inward-opening tilt window, wherein the inward-opening force point can be attached to the window frame to increase the strength.

[0004] A second object of the present invention is to provide an inward-opening tilt window having an inner frame that rotates inward relative to an outer frame, and a support point that can be attached to the window frame to increase strength.

[0005] One of the purposes of the present invention is achieved by the following technical solution:

[0006] The hinge of the inward-opening tilt window includes a first hinge seat, a second hinge seat, a first hinge piece, a second hinge piece, an elastic component, and an inverted member, wherein the first hinge piece and the second hinge piece are cross-hinged; one end of the first hinge piece is hinged to the first hinge seat and forms a first hinge end, and the other end of the first hinge piece is hinged to the second hinge seat; one end of the second hinge piece is hinged to the first hinge seat and forms a second hinge end, and the other end of the second hinge piece is hinged to one end of the elastic component; the other end of the elastic component is hinged to the second hinge seat and forms a third hinge end; the first hinge end and the second hinge end are spaced apart;

[0007] One end of the inner inverted part is formed as a connecting end, and the other end of the inner inverted part is formed as a swinging end; a contact piece is protruding from the outer surface of the inner inverted part; the connecting end is connected to the second hinge seat; a swinging groove is provided in the first hinge plate, and the swinging end is connected to the swinging groove, and the swinging end can swing around the vertical axis; the contact piece is used to abut against the bottom end surface of the second hinge seat.

[0008] Furthermore, the elastic component is an elastic sheet.

[0009] Furthermore, the elastic component includes at least two elastic sheets; and the at least two elastic sheets are stacked.

[0010] Furthermore, a limiting piece is provided on the second hinge seat, and the limiting piece is used to abut against the outer side of the elastic component.

[0011] Furthermore, the abutment piece covers the bottom edge of the second hinge seat.

[0012] Furthermore, a guiding slope is provided on the side surface of the swing end, and the guiding slope gradually tilts inward from top to bottom; the guiding slope is in sliding fit with the inner wall of the swing groove.

[0013] Furthermore, a guide step is provided at the bottom end of the swing end, and the guide step is gradually inclined from top to bottom; the guide step is slidably matched with the bottom wall of the swing groove.

[0014] Furthermore, a first avoidance groove is provided at the end of the first hinged piece away from the first hinged end, and a second avoidance groove is provided at the end of the second hinged piece away from the second hinged end. Openings are provided on the outer sides of the first avoidance groove and the second avoidance groove. The first avoidance groove and the second avoidance groove are used to pass through up and down after the first hinged piece and the second hinged piece are rotated outward.

[0015] Furthermore, the first avoidance groove is surrounded by a first groove wall, a second groove wall and a first bottom wall, and an opening of the first avoidance groove is formed between the first groove wall and the second groove wall; the first groove wall is gradually inclined toward the second groove wall from the outside to the inside;

[0016] The second avoidance groove is surrounded by the third groove wall, the fourth groove wall and the second bottom wall. The opening of the second avoidance groove is formed between the third groove wall and the fourth groove wall. The third groove wall gradually inclines toward the fourth groove wall from the outside to the inside; the inclination angle of the third groove wall is consistent with that of the first groove wall.

[0017] The second object of the present invention is achieved by adopting the following technical solutions:

[0018] The inward-opening tilt window comprises an outer frame, an inner frame and the hinge, wherein the first hinge seat is mounted on the outer frame, and the second hinge seat is mounted on the inner frame.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. During assembly, the first hinge seat can be installed on the outer frame of the window, and the second hinge seat can be installed on the inner frame of the window. When the window is opened normally, the inner frame of the window opens outward, and the first hinge piece and the second hinge piece rotate with the first hinge end and the second hinge end as fulcrums. The inner frame of the window can be opened outward with the third hinge end as the fulcrum. At this time, the elastic component can increase the rotation range of the second hinge piece, and the outward opening range is relatively large.

[0021] 2. When the inner frame of the window is opened inward, the first hinge piece and the second hinge piece are folded. At this time, the inner frame of the window is pushed inward, and the second hinge seat fixed to the inner frame of the window rotates inward at the third hinge end. The elastic component can be stretched and deformed at this time, so that the inner frame of the window can be rotated to a smaller angle. Since the inward opening angle of the window is achieved by the deformation of the elastic component, the fulcrum points are distributed on the outer frame and the inner frame of the window, respectively, and the supporting strength is relatively high.

[0022] 3. When tilting inward, the swing end can swing inward around the vertical axis in the swing groove to realize the inward opening of the window. The abutment piece can abut on the end wall of the swing groove when the swing end swings inward. Therefore, when opening inward, the abutment piece can be used as a fulcrum for support. It is closer to the fixed point of the first hinge seat on the window frame, has a smaller torque, and has good load-bearing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Schematic diagram of the structure of the hinge of the present invention;

[0024] Figure 2 is a structural schematic diagram of another state of the hinge of the present invention;

[0025] Figure 3 for Figure 2 A partial cross-sectional view of

[0026] Figure 4 is a structural schematic diagram of another state of the hinge of the present invention;

[0027] Figure 5 is a structural schematic diagram of another state of the hinge of the present invention;

[0028] Figure 6 It is a structural schematic diagram of the inner inverting member of the present invention;

[0029] Figure 7 is a schematic structural diagram of the second hinged piece of the present invention;

[0030] Figure 8 This is a schematic structural diagram of the elastic sheet of the present invention;

[0031] Figure 9 This is a schematic structural diagram of the inward-opening and tilting window of the present invention in a closed state;

[0032] Figure 10 This is a schematic structural diagram of the inward-opening tilt window of the present invention in an open state;

[0033] Figure 11 This is a structural schematic diagram of another open state of the inward-opening tilt window of the present invention.

[0034] In the figure: 10, hinge; 11, first hinge seat; 111, swinging groove; 12, second hinge seat; 121, limiting plate; 13, first hinge plate; 131, first avoidance groove; 14, second hinge plate; 141, second avoidance groove; 142, third groove wall; 143, fourth groove wall; 144, second bottom wall; 15, elastic component; 161, connecting end; 162, swinging end; 163, abutting plate; 164, guiding slope; 165, guiding step; 20, outer frame; 30, inner frame. DETAILED DESCRIPTION

[0035] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0036] In the description of the present invention, it should be noted that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limiting the present invention.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0038] Example 1,

[0039] like Figure 1 The hinge 10 of the inward-opening tilt window shown in Figure 8 includes a first hinge base 11, a second hinge base 12, a first hinge plate 13, a second hinge plate 14, an elastic component 15 and an inward-turning member. Specifically, one end of the first hinge plate 13 is hinged to the first hinge base 11 and forms a first hinge end, while the other end of the first hinge plate 13 is hinged to the second hinge base 12.

[0040] Furthermore, one end of the second hinge piece 14 is hinged to the first hinge seat 11, forming a second hinge end. The other end of the second hinge piece 14 is hinged to one end of an elastic member 15. The other end of the elastic member 15 is hinged to the second hinge seat 12, forming a third hinge end. Furthermore, the first hinge piece 13 and the second hinge piece 14 are cross-hinged, with the first and second hinge ends spaced apart. Furthermore, the second hinge seat 12 can rotate inwardly using the third hinge end as a fulcrum.

[0041] One end of the inner inverted member is formed as a connecting end 161, while the other end is formed as a swinging end 162. An abutment piece 163 is protruding from the outer surface of the inner inverted member. The connecting end 161 is connected to the second hinge seat 12, while the first hinge plate 13 is provided with a swinging groove 111. The swinging end 162 is inserted into the swinging groove 111, allowing the swinging end 162 to swing about a vertical axis. The abutment piece 163 can abut the bottom end surface of the second hinge seat 12.

[0042] Based on the above structure, when using the hinge 10 for an inward-opening tilt window of the present invention, the first hinge seat 11 can be mounted on the window outer frame 20, and the second hinge seat 12 can be mounted on the window inner frame 30. When the window is normally opened, the window inner frame 30 opens outward, and the first hinge piece 13 and the second hinge piece 14 rotate with the first hinge end and the second hinge end as the fulcrum. The window inner frame 30 can then be opened outward with the third hinge end as the fulcrum. In this case, the elastic member 15 can increase the rotation range of the second hinge piece 14, resulting in a relatively large outward opening range. The first hinge piece 13 and the second hinge piece 14 are spaced apart at the first hinge end and the second hinge end of the first hinge seat 11, so that the support structure formed after opening is relatively stable.

[0043] When the window inner frame 30 is opened inward, the first hinge piece 13 and the second hinge piece 14 are folded, and the window inner frame 30 is pushed inward at this time. The above-mentioned swing end 162 can swing inward around the vertical axis in the swing groove 111 to realize the inward opening of the window, and the abutment piece 163 can abut on the end wall of the swing groove 111 when the swing end 162 swings inward, and the swing groove 111 can limit the swing range of the swing axis, that is, the inward opening angle range of the window inner frame 30 is relatively small; in the above process, the elastic component 15 can be stretched and deformed inward, so that the window inner frame 30 can rotate inward at a smaller angle, and since the inward opening angle of the window is realized by the deformation of the elastic component 15, the fulcrums are respectively distributed on the window outer frame 20 and the window inner frame 30, and the supporting strength is relatively high.

[0044] During the inward tilting process, the abutment piece 163 can abut against the bottom end of the second hinge seat 12, so that when opening inward, it can be supported by the abutment piece 163 as a fulcrum. Therefore, the supporting fulcrum of the second hinge seat 12 is relatively close to the fixed point of the first hinge seat 11 on the window frame, the torque is small, and it has good load-bearing performance.

[0045] Furthermore, the elastic component 15 in this embodiment is an elastic sheet, which can be a metal spring sheet in the prior art, and can be stretched and deformed under the action of external force to rotate the window inner frame 30 inward and then reset.

[0046] More specifically, the elastic component 15 includes at least two elastic sheets, which are stacked. In this embodiment, there are three elastic sheets, which are hinged after being stacked. On the one hand, this does not affect the deformation of the elastic component 15, and on the other hand, it can also enhance the strength of the elastic component 15.

[0047] Furthermore, a limiting piece 121 may be provided on the second hinge seat 12. The limiting piece 121 may abut against the outer side of the elastic member 15. In this way, when the window inner frame 30 is opened outward, the limiting piece 121 may be forced outward during the outward rotation of the elastic member 15, driving the window inner frame 30 to open outward together. After the window is fully opened, the limiting piece 121 may also play a certain supporting role. When the window inner frame 30 is opened inward, the first hinge piece 13 and the second hinge piece 14 are folded, and the elastic member 15 is restricted from rotating outward relative to the window inner frame 30. This allows the window inner frame 30 to have the freedom to rotate inward, allowing the second hinge seat 12 to rotate inward at the third hinge end, thereby achieving inward opening of the window.

[0048] Furthermore, the abutment piece 163 in this embodiment covers the bottom edge of the second hinge seat 12, so the abutment area of the abutment piece 163 is relatively large, and the formed fulcrum is relatively close to the first hinge seat 11, resulting in smaller torque and better load-bearing performance.

[0049] Furthermore, the outer diameter of the swing end 162 gradually decreases from top to bottom, so that the swing end 162 can have a swinging tendency in the swing groove 111, that is, the swing end 162 with a smaller outer diameter can swing in the swing groove 111 to achieve inward opening.

[0050] Specifically, a guide bevel 164 can be provided on the side of the swing end 162, and the guide bevel 164 gradually tilts inward from top to bottom. The above-mentioned guide bevel 164 is slidably matched with the inner wall of the swing groove 111, that is, when the swing end 162 swings in the swing groove 111, the guide bevel 164 can guide the swing groove 111 to swing inward, and the swing is smoother.

[0051] Furthermore, a guide step 165 may be provided at the bottom end of the swing end 162, and the guide step 165 may be gradually tilted from top to bottom. In this way, when the swing end 162 swings in the swing groove 111, the guide step 165 at the bottom end of the swing end 162 may also slide with the bottom wall of the swing groove 111, so that the guide step 165 may further guide the swing end 162 to tilt inward.

[0052] Furthermore, in this embodiment, a first escape groove 131 is provided at the end of the first hinged piece 13 away from the first hinged end, and a second escape groove 141 is provided at the end of the second hinged piece 14 away from the second hinged end. Openings are provided on the outer sides of the first and second escape grooves 131, 141. After the first and second hinged pieces 13, 14 are rotated outward, the first and second escape grooves 131, 141 can be vertically connected. When the window is opened, the inner window frame is pushed to rotate outward, which in turn causes the first and second hinged pieces 13, 14 to rotate outward. During this rotation process, the first escape groove 131 on the first hinged piece 13 and the second escape groove 141 on the second hinged piece 14 can be vertically connected, allowing the edge of the inner window frame to fit in. Therefore, the edge of the inner window frame does not interfere during the rotation process, allowing the inner window frame to open and close at a larger angle.

[0053] Furthermore, the first escape groove 131 in this embodiment is formed by a first groove wall, a second groove wall, and a first bottom wall. The opening of the first escape groove 131 is formed between the first and second groove walls, and the first groove wall gradually slopes toward the second groove wall from the outside to the inside. Thus, when the inner window frame is pushed outward and rotated outward, the edge of the inner window frame can rotate inward relative to the first hinge piece 13. The first groove wall can guide the edge of the inner window frame into the first escape groove 131, and the opening of the first escape groove 131 is relatively enlarged, allowing the inner window frame to enter smoothly.

[0054] Furthermore, the second escape groove 141 is formed by a third groove wall 142, a fourth groove wall 143, and a second bottom wall 144. The opening of the second escape groove 141 is formed between the third groove wall 142 and the fourth groove wall 143. The third groove wall 142 gradually tilts toward the fourth groove wall 143 from the outside to the inside, and the inclination angle of the third groove wall 142 is the same as that of the first groove wall. Similarly, when the inner window frame is pushed outward and rotated outward, the edge of the inner window frame can rotate inward relative to the second hinge piece 14. The third groove wall 142 can guide the edge of the inner window frame into the second escape groove 141, and the opening of the second escape groove 141 is relatively enlarged, allowing the inner window frame to enter smoothly. In addition, the first and third groove walls 142 have the same inclination angle. When fully rotated, the edge of the inner window frame can be flush with the first and third groove walls 142, preventing unevenness.

[0055] More specifically, the first groove wall, the second groove wall and the first bottom wall are flush with the third groove wall 142, the fourth groove wall 143 and the second bottom wall 144 after the first hinge piece 13 and the second hinge piece 14 are rotated outward. When rotated into place, the edge of the inner window frame can be flush with the first groove wall and the third groove wall 142, and can also be flush with the second groove wall and the fourth groove wall 143 to prevent unevenness.

[0056] Example 2,

[0057] like Figure 1 The inward-opening and tilting window shown in Figure 11 includes an outer frame 20, an inner frame 30 and the above-mentioned hinge 10. The hinge 10 includes a first hinge seat 11, a second hinge seat 12, a first hinge piece 13, a second hinge piece 14, an elastic component 15 and an inner tilting member. Specifically, one end of the first hinge piece 13 is hinged to the first hinge seat 11 and forms a first hinge end, while the other end of the first hinge piece 13 is hinged to the second hinge seat 12.

[0058] Furthermore, one end of the second hinge piece 14 is hinged to the first hinge seat 11, forming a second hinge end. The other end of the second hinge piece 14 is hinged to one end of an elastic member 15. The other end of the elastic member 15 is hinged to the second hinge seat 12, forming a third hinge end. Furthermore, the first hinge piece 13 and the second hinge piece 14 are cross-hinged, with the first and second hinge ends spaced apart. Furthermore, the second hinge seat 12 can rotate inwardly using the third hinge end as a fulcrum.

[0059] One end of the inner inverted member is formed as a connecting end 161, while the other end is formed as a swinging end 162. An abutment piece 163 is protruding from the outer surface of the inner inverted member. The connecting end 161 is connected to the second hinge seat 12, and the first hinge seat 11 is provided with a swinging groove 111. The swinging end 162 is inserted into the swinging groove 111, allowing the swinging end 162 to swing about a vertical axis. The abutment piece 163 can abut the bottom end surface of the second hinge seat 12.

[0060] Based on the above structure, when using the inward-opening tilt window of the present invention, the first hinge seat 11 can be installed on the window outer frame 20, and the second hinge seat 12 can be installed on the window inner frame 30. When the window is normally opened, the window inner frame 30 opens outward, and the first hinge piece 13 and the second hinge piece 14 rotate with the first hinge end and the second hinge end as the fulcrum. The window inner frame 30 can then be opened outward with the third hinge end as the fulcrum. In this case, the elastic member 15 can increase the rotation range of the second hinge piece 14, resulting in a relatively large outward opening range. The first hinge piece 13 and the second hinge piece 14 are spaced apart at the first hinge end and the second hinge end of the first hinge seat 11, so that the support structure formed after opening is relatively stable.

[0061] When the window inner frame 30 is opened inward, the first hinge piece 13 and the second hinge piece 14 are folded, and the window inner frame 30 is pushed inward at this time. The above-mentioned swing end 162 can swing inward around the vertical axis in the swing groove 111 to realize the inward opening of the window, and the abutment piece 163 can abut on the end wall of the swing groove 111 when the swing end 162 swings inward, and the swing groove 111 can limit the swing range of the swing axis, that is, the inward opening angle range of the window inner frame 30 is relatively small; in the above process, the elastic component 15 can be stretched and deformed inward, so that the window inner frame 30 can rotate inward at a smaller angle, and since the inward opening angle of the window is realized by the deformation of the elastic component 15, the fulcrums are respectively distributed on the window outer frame 20 and the window inner frame 30, and the supporting strength is relatively high.

[0062] During the inward tilting process, the abutment piece 163 can abut against the bottom end of the second hinge seat 12, so that when opening inward, it can be supported by the abutment piece 163 as a fulcrum. Therefore, the supporting fulcrum of the second hinge seat 12 is relatively close to the fixed point of the first hinge seat 11 on the window frame, the torque is small, and it has good load-bearing performance.

[0063] Furthermore, the elastic component 15 in this embodiment is an elastic sheet, which can be a metal spring sheet in the prior art, and can be stretched and deformed under the action of external force to rotate the window inner frame 30 inward and then reset.

[0064] More specifically, the elastic component 15 includes at least two elastic sheets, which are stacked. In this embodiment, there are three elastic sheets, which are hinged after being stacked. On the one hand, this does not affect the deformation of the elastic component 15, and on the other hand, it can also enhance the strength of the elastic component 15.

[0065] Furthermore, a limiting piece 121 may be provided on the second hinge seat 12. The limiting piece 121 may abut against the outer side of the elastic member 15. In this way, when the window inner frame 30 is opened outward, the limiting piece 121 may be forced outward during the outward rotation of the elastic member 15, driving the window inner frame 30 to open outward together. After the window is fully opened, the limiting piece 121 may also play a certain supporting role. When the window inner frame 30 is opened inward, the first hinge piece 13 and the second hinge piece 14 are folded, and the elastic member 15 is restricted from rotating outward relative to the window inner frame 30. This allows the window inner frame 30 to have the freedom to rotate inward, allowing the second hinge seat 12 to rotate inward at the third hinge end, thereby achieving inward opening of the window.

[0066] Furthermore, the abutment piece 163 in this embodiment covers the bottom edge of the second hinge seat 12, so the abutment area of the abutment piece 163 is relatively large, and the formed fulcrum is relatively close to the first hinge seat 11, resulting in smaller torque and better load-bearing performance.

[0067] Furthermore, the outer diameter of the swing end 162 gradually decreases from top to bottom, so that the swing end 162 can have a swinging tendency in the swing groove 111, that is, the swing end 162 with a smaller outer diameter can swing in the swing groove 111 to achieve inward opening.

[0068] Specifically, a guide bevel 164 can be provided on the side of the swing end 162, and the guide bevel 164 gradually tilts inward from top to bottom. The above-mentioned guide bevel 164 is slidably matched with the inner wall of the swing groove 111, that is, when the swing end 162 swings in the swing groove 111, the guide bevel 164 can guide the swing groove 111 to swing inward, and the swing is smoother.

[0069] Furthermore, a guide step 165 may be provided at the bottom end of the swing end 162, and the guide step 165 may be gradually tilted from top to bottom. In this way, when the swing end 162 swings in the swing groove 111, the guide step 165 at the bottom end of the swing end 162 may also slide with the bottom wall of the swing groove 111, so that the guide step 165 may further guide the swing end 162 to tilt inward.

[0070] Furthermore, in this embodiment, a first escape groove 131 is provided at the end of the first hinged piece 13 away from the first hinged end, and a second escape groove 141 is provided at the end of the second hinged piece 14 away from the second hinged end. Openings are provided on the outer sides of the first and second escape grooves 131, 141. After the first and second hinged pieces 13, 14 are rotated outward, the first and second escape grooves 131, 141 can be vertically connected. When the window is opened, the inner window frame is pushed to rotate outward, which in turn causes the first and second hinged pieces 13, 14 to rotate outward. During this rotation process, the first escape groove 131 on the first hinged piece 13 and the second escape groove 141 on the second hinged piece 14 can be vertically connected, allowing the edge of the inner window frame to fit in. Therefore, the edge of the inner window frame does not interfere during the rotation process, allowing the inner window frame to open and close at a larger angle.

[0071] Furthermore, the first escape groove 131 in this embodiment is formed by a first groove wall, a second groove wall, and a first bottom wall. The opening of the first escape groove 131 is formed between the first and second groove walls, and the first groove wall gradually slopes toward the second groove wall from the outside to the inside. Thus, when the inner window frame is pushed outward and rotated outward, the edge of the inner window frame can rotate inward relative to the first hinge piece 13. The first groove wall can guide the edge of the inner window frame into the first escape groove 131, and the opening of the first escape groove 131 is relatively enlarged, allowing the inner window frame to enter smoothly.

[0072] Furthermore, the second escape groove 141 is formed by a third groove wall 142, a fourth groove wall 143, and a second bottom wall 144. The opening of the second escape groove 141 is formed between the third groove wall 142 and the fourth groove wall 143. The third groove wall 142 gradually tilts toward the fourth groove wall 143 from the outside to the inside, and the inclination angle of the third groove wall 142 is the same as that of the first groove wall. Similarly, when the inner window frame is pushed outward and rotated outward, the edge of the inner window frame can rotate inward relative to the second hinge piece 14. The third groove wall 142 can guide the edge of the inner window frame into the second escape groove 141, and the opening of the second escape groove 141 is relatively enlarged, allowing the inner window frame to enter smoothly. In addition, the first and third groove walls 142 have the same inclination angle. When fully rotated, the edge of the inner window frame can be flush with the first and third groove walls 142, preventing unevenness.

[0073] More specifically, the first groove wall, the second groove wall and the first bottom wall are flush with the third groove wall 142, the fourth groove wall 143 and the second bottom wall 144 after the first hinge piece 13 and the second hinge piece 14 are rotated outward. When rotated into place, the edge of the inner window frame can be flush with the first groove wall and the third groove wall 142, and can also be flush with the second groove wall and the fourth groove wall 143 to prevent unevenness.

[0074] Those skilled in the art can make various other corresponding changes and deformations based on the technical solutions and concepts described above, and all of these changes and deformations should fall within the scope of protection of the claims of the present invention.

Claims

1. The hinge of the inward opening and tilting window is characterized by: The hinge comprises a first hinge seat, a second hinge seat, a first hinge piece, a second hinge piece, an elastic component and an inner inverted component, wherein the first hinge piece and the second hinge piece are cross-hinged; one end of the first hinge piece is hinged to the first hinge seat and forms a first hinge end, and the other end of the first hinge piece is hinged to the second hinge seat; one end of the second hinge piece is hinged to the first hinge seat and forms a second hinge end, and the other end of the second hinge piece is hinged to one end of the elastic component; the other end of the elastic component is hinged to the second hinge seat and forms a third hinge end; the first hinge end and the second hinge end are spaced apart; One end of the inner inverted part is formed as a connecting end, and the other end of the inner inverted part is formed as a swinging end; a contact piece is convexly provided on the outer surface of the inner inverted part; the connecting end is connected to the second hinge seat; a swinging groove is provided in the first hinge piece, and the swinging end is connected to the swinging groove, and the swinging end can swing around the vertical axis; the contact piece is used to abut against the bottom end surface of the second hinge seat; a guide slope is provided on the side surface of the swinging end, and the guide slope gradually tilts inward from top to bottom; the guide slope slides in cooperation with the inner wall of the swinging groove; a guide step is provided at the bottom end of the swinging end, and the guide step gradually tilts inward from top to bottom; the guide step slides in cooperation with the bottom wall of the swinging groove.

2. The hinge for the inward-opening tilt window according to claim 1, characterized in that: The elastic component is an elastic sheet.

3. The hinge for the inward-opening tilt window according to claim 2, wherein: The elastic component includes at least two elastic sheets; the at least two elastic sheets are stacked.

4. The hinge for the inward-opening tilt window according to claim 1, wherein: The second hinge seat is provided with a limiting piece, and the limiting piece is used to abut against the outer side of the elastic component.

5. The hinge for the inward-opening tilt window according to claim 1, characterized in that: The contact piece covers the bottom edge of the second hinge seat.

6. The hinge for the inward-opening tilt window according to claim 1, characterized in that: A first avoidance groove is provided at the end of the first hinged piece away from the first hinged end, and a second avoidance groove is provided at the end of the second hinged piece away from the second hinged end. Openings are provided on the outer sides of the first avoidance groove and the second avoidance groove. The first avoidance groove and the second avoidance groove are used to pass through up and down after the first hinged piece and the second hinged piece are rotated outward.

7. The hinge for an inward-opening tilt window according to claim 6, wherein: The first avoidance groove is surrounded by a first groove wall, a second groove wall and a first bottom wall, and an opening of the first avoidance groove is formed between the first groove wall and the second groove wall; the first groove wall is gradually inclined toward the second groove wall from the outside to the inside; The second avoidance groove is surrounded by the third groove wall, the fourth groove wall and the second bottom wall. The opening of the second avoidance groove is formed between the third groove wall and the fourth groove wall. The third groove wall gradually inclines toward the fourth groove wall from the outside to the inside; the inclination angle of the third groove wall is consistent with that of the first groove wall.

8. Inward opening tilt window, characterized by: It comprises an outer frame, an inner frame and the hinge according to any one of claims 1 to 7, wherein the first hinge seat is mounted on the outer frame, and the second hinge seat is mounted on the inner frame.

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