CN211736813U

CN211736813U - Limit hinge and door and window structure

Info

Publication number: CN211736813U
Application number: CN201921735429.XU
Authority: CN
Inventors: 白宝鲲
Original assignee: Guangdong Kinlong Hardware Products Co Ltd
Current assignee: Guangdong Kinlong Hardware Products Co Ltd
Priority date: 2019-10-16
Filing date: 2019-10-16
Publication date: 2020-10-23
Anticipated expiration: 2029-10-16

Abstract

The utility model relates to a spacing hinge, including trailing arm, base, linkage subassembly and spacing subassembly. The bracket arm is fixedly connected with the sash part of the door and window structure. The base is fixedly connected with the frame of the door and window structure. The linkage assembly is rotatably connected with the base and the supporting arm, so that the supporting arm can rotate relative to the base. Spacing subassembly includes first connecting rod, second connecting rod and locking piece, first connecting rod with bracket and second connecting rod all rotate to be connected, the locking piece with base and second connecting rod all rotate to be connected, the locking piece includes the locking state and opens the attitude, works as when the locking piece is in the locking state, blocks the second connecting rod breaks away from the base, when being in the opening state, the second connecting rod can break away from the base. The utility model discloses still relate to a door and window structure including above-mentioned spacing hinge. The limiting hinge can achieve the technical effect of adjusting the maximum opening angle.

Description

Limit hinge and door and window structure

Technical Field

The utility model relates to a door and window device field especially relates to a spacing hinge and door and window structure.

Background

A hinge is a link type movable link device for connecting a window sash and a window frame to enable the window to be opened and closed. Under the condition that children exist, the opening angle of the window is not too large, and the condition that the children open the window and fall from the window privately is avoided. Therefore, the hinge on the market at present mostly adopts a limiting mechanism to limit the opening angle of the hinge, so that the window can be opened only at a small angle. But the setting of stop gear makes the biggest opening angle of hinge unadjustable, and it is inconvenient to use when needing to open bigger angle.

SUMMERY OF THE UTILITY MODEL

Therefore, it is necessary to provide a limit hinge and a door/window structure for solving the problem that the maximum opening angle of the hinge is not adjustable.

A check hinge, comprising:

the bracket arm is fixedly connected with the sash part of the door and window structure;

the base is fixedly connected with the frame part of the door and window structure;

the linkage assembly is rotatably connected with the base and the supporting arm, so that the supporting arm can rotate relative to the base; and

spacing subassembly, including first connecting rod, second connecting rod and locking piece, first connecting rod with bracket and second connecting rod all rotate to be connected, the locking piece with base and second connecting rod all rotate to be connected, the locking piece includes the locking state and opens the state, works as when the locking piece is in the locking state, blocks the second connecting rod breaks away from the base, when being in the state of opening, the second connecting rod can break away from the base.

In one embodiment, one end of the locking member is rotatably connected to the base and extends in a direction away from the base, and when the locking member is in an open state, the second link is movable in the extending direction of the locking member and is disengaged from the base.

In one embodiment, the second connecting rod is provided with a first locking hole, the locking piece penetrates through the first locking hole, the side wall of the locking piece extends outwards to form a locking block, the second connecting rod is further provided with a second locking hole communicated with the first locking hole, the second locking hole is matched with the locking block, when the locking piece is in a locking state, the locking block and the second locking hole are staggered in position to prevent the second connecting rod from being separated from the locking piece, and when the locking piece is in an opening state, the locking block and the second locking hole are overlapped in position to enable the second connecting rod to be separated from the locking piece.

In one embodiment, when the locking piece is in a locking state, the second connecting rod abuts against the base, and the locking block abuts against the side face, away from the base, of the second connecting rod.

In one embodiment, the limiting assembly further includes a connecting member, the first connecting rod is provided with a first sliding groove, the second connecting rod is provided with a connecting hole, and the connecting member is inserted through the connecting hole and the first sliding groove to rotatably connect the first connecting rod and the second connecting rod and can slide along the first sliding groove.

In one embodiment, the connecting member includes a body and a torsion spring, the body is disposed through the connecting hole and the first sliding groove, the torsion spring is sleeved outside the body, two ends of the torsion spring are respectively matched with the first connecting rod and the second connecting rod, and when the first connecting rod rotates relative to the second connecting rod, the torsion spring drives the body to slide in the first sliding groove.

In one embodiment, the limit hinge further comprises an adjusting part and an adjusting screw, the adjusting screw penetrates through the base and the adjusting part to fix the adjusting part on the base, the linkage assembly comprises a first linkage rod, and the first linkage rod is rotatably connected with the adjusting part and is partially located between the adjusting part and the base.

In one embodiment, a second sliding groove is formed in the base, the adjusting screw penetrates through the second sliding groove, and when the first linkage rod rotates relative to the adjusting piece, the adjusting piece drives the adjusting screw to slide in the second sliding groove.

In one embodiment, the bracket is provided with a prying-resistant projection, the base is provided with a prying-resistant groove, the prying-resistant groove is matched with the prying-resistant projection, and when the door and window structure is closed, the prying-resistant projection is positioned in the prying-resistant groove.

A door and window structure comprises a sash part, a frame part and the limit hinge, wherein the frame part is fixed on a building base body, and the sash part is rotatably connected with the frame part.

Above-mentioned spacing hinge, through setting up the locking piece, be in the locking state when the locking piece, the biggest opening angle between spacing subassembly can restrict trailing arm and the base, and when the locking piece was in the opening state, spacing subassembly broke away from the base, and trailing arm and base can realize bigger opening angle. Therefore, the technical effect of adjusting the maximum opening angle of the limiting hinge is achieved.

Drawings

Fig. 1 is a schematic structural view of an embodiment of a limit hinge of the present invention;

FIG. 2 is an exploded view of the check hinge shown in FIG. 1;

FIG. 3 is a schematic view of the configuration of the check hinge of FIG. 1 showing the locking member in an open position;

FIG. 4 is a schematic view of the check hinge of FIG. 1 shown closed;

FIG. 5 is a schematic view of the check hinge of FIG. 1 moved to another position;

FIG. 6 is a schematic view of the check hinge of FIG. 1 shown in a configuration to achieve a maximum opening angle;

FIG. 7 is a schematic structural view of the check hinge shown in FIG. 1 after the second link is detached from the base;

FIG. 8 is a schematic structural view of an embodiment of a door/window structure according to the present invention;

fig. 9 is a schematic structural view of the door/window structure shown in fig. 8 after the second link is detached from the base.

Wherein,

limit hinge 100

Bracket arm 110

First connection portion 111

Second connecting part 112

Base 120

Third connecting part 121

Fourth connecting part 122

Second chute 123

Anti-prying slot 124

Anti-prying bump 125

Linkage assembly 130

First linkage rod 131

Second linkage rod 132

Third link rod 133

Limit assembly 140

First link 141

First runner 142

Second link 143

First locking hole 144

Second locking hole 145

Locking member 146

Locking block 147

Connecting piece 148

Body 149

Torsion spring 150

Hook 151

Connecting hole 152

Adjusting member 160

First step 161

Second step 162

Connecting part 163

Adjusting screw 164

Gasket 165

Spacer 166

Door and window structure 200

Fan part 210

Frame 220

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1, 2 and 8, a check hinge 100 is used to connect a sash portion 210 and a frame portion 220 of a door and window structure 200. When the door is opened or closed, the sash 210 of the door/window structure 200 rotates relative to the frame 220, so as to drive the limit hinge 100 to open or close. The maximum opening angle of the limit hinge 100 is limited, so that the maximum opening angle between the sash portion 210 and the frame portion 220 of the door/window structure 200 can be limited.

Specifically, the check hinge 100 includes a bracket 110, a base 120, a linkage assembly 130, and a check assembly 140. The bracket arm 110 is fixedly connected with the fan portion 210, and the base 120 is fixedly connected with the frame portion 220. When the fan portion 210 rotates relative to the frame portion 220, the supporting arm 110 is driven to rotate relative to the base 120. The linkage assembly 130 is rotatably connected with both the bracket arm 110 and the base 120, so as to transmit force between the bracket arm 110 and the base 120, and the bracket arm 110 can rotate relative to the base 120. The stopper assembly 140 includes a first link 141, a second link 143, and a locking member 146. The first link 141 is rotatably connected to both the bracket 110 and the second link 143, and the locking member 146 is rotatably connected to both the base 120 and the second link 143. The locking member 146 includes a locked state and an unlocked state, and when the locking member 146 is formed into the locked state, the second link 143 is blocked from being separated from the base 120. At this time, when the door/window structure 200 is opened, the supporting arm 110 rotates relative to the base 120, and drives the limiting component 140 to move. When the door/window structure 200 moves to the position where the first link 141 and the second link 143 are aligned, as shown in fig. 6, the opening angle of the position limiting hinge 100 cannot be increased due to the limitation of the position limiting assembly 140, and the door/window structure 200 reaches the maximum opening angle. As shown in fig. 3 and 7, when the locking member 146 is in the open state, the second link 143 can be separated from the base 120, and the check hinge 100 can be opened to a greater degree.

It can be understood that, as shown in fig. 7 and 9, after the second link 143 is separated from the base 120, the opening angle of the check hinge 100 is no longer limited by the check assembly 140, and a larger opening angle can be performed. At this time, the maximum opening angle of the check hinge 100 is determined by the structure and the installation environment of the check hinge 100, and if the bracket 110 rotates relative to the base 120 to abut against the frame 220 and cannot be opened at a larger angle, the opening angle of the check hinge 100 reaches the maximum. Of course, when the check hinge 100 reaches the maximum opening angle, the window and door structure 200 is opened by the maximum opening angle.

Referring to fig. 1 and 3, in one embodiment, the locking member 146 is pivotally connected to the base 120 at one end and extends away from the base 120. When the locking member 146 is in the open state, as shown in fig. 3, the second link 143 can move in the extending direction of the locking member 146 and disengage from the base 120.

Specifically, as shown in fig. 3, the second link 143 has a first locking hole 144, and the locking member 146 is disposed through the first locking hole 144. The side walls of the locking member 146 extend outwardly to form locking blocks 147. The second link 143 is further provided with a second locking hole 145 communicated with the first locking hole 144, and the second locking hole 145 is matched with the locking block 147. As shown in fig. 1, when the locking member 146 is in the locking state, the locking block 146 is misaligned with the second locking hole 145, i.e., the locking block 147 is located on the moving path of the second link 143 away from the base 120. At this time, the second link 143 is rotatably connected to the base 120 and cannot be separated from the base 120. As shown in fig. 3, when the locking member 146 is in the open state, the locking piece 147 overlaps the second locking hole 145. At this time, when the second link 143 moves in a direction away from the base 120, the locking block 147 passes through the second locking hole 145, and does not block the second link 143 from being separated from the base 120.

Alternatively, the shape of the locking block 147 is not limited, and may be any suitable shape, as long as the shape of the second locking hole 145 is adjusted to fit the locking block 147. The position of the locking block 147 is not limited as long as the distance between the locking block 147 and the surface of the base 120 is greater than the thickness of the second link 143. An inner hexagonal groove can be further formed in the locking member 146, and at the moment, an inner hexagonal wrench is inserted into the inner hexagonal groove to rotate, so that the locking member 146 can rotate relative to the base 120 and is switched to a locking state or an opening state, and the use is convenient. It will be appreciated that the second link 143 can be rotated relative to the base 120 to change the position of the second locking hole 145. Therefore, when the locking member 146 is in the open state, the position of the locking piece 147 is not limited as long as it can be opposed to the second locking hole 145. In use, the locking member 146 can be opened by adjusting the position of the locking block 147 to be opposite to the second locking hole 145, and by rotating the second link 143 to move the second locking hole 145 to be opposite to the locking block 147.

In one embodiment, as shown in fig. 1, when the locking member 146 is in the locked state, the second link 143 abuts against the base 120, and the locking block 147 abuts against a side surface of the second link 143 away from the base 120. I.e. the distance between the locking block 147 and the surface of the base 120 is exactly equal to the thickness of the second link 143. By this arrangement, when the locking member 146 is in the locked state, the second link 143 is not easily shaken up and down when rotating relative to the base 120.

Referring to fig. 2, in one embodiment, the position-limiting assembly 140 further includes a connecting member 148. The first link 141 is provided with a first sliding slot 142, the second link 143 is provided with a connecting hole 152, and the connecting member 148 penetrates through the connecting hole 152 and the first sliding slot 142 to enable the first link 141 and the second link 143 to be rotatably connected and to slide along the first sliding slot 142.

Specifically, as shown in fig. 4, when the check hinge 100 is closed, the connecting member 148 is located at one end of the first sliding groove 142 near the bracket 110. When the limit hinge 100 is opened, the first link 141 is driven to rotate relative to the second link 143, and at this time, as shown in fig. 5, the connecting member 148 slides along the first sliding slot 142 first. As shown in fig. 1, when the connecting member 148 slides to an end of the first sliding groove 142 away from the bracket 110, the first connecting rod 141 rotates relative to the second connecting rod 143. If the first sliding slot 142 is not provided, when the first connecting rod 141 rotates relative to the second connecting rod 143, both the first connecting rod 141 and the second connecting rod 143 abut against the connecting member 148, so that the force direction of the connecting member 148 is not fixed, and if the force is too large, the connecting member 148 may be damaged and deformed. Therefore, by providing the first sliding groove 142, the connecting member 148 preferentially slides along the first sliding groove 142 during the opening and closing of the limit hinge 100, and the situation that the connecting member 148 is damaged and deformed due to an excessive force can be avoided.

In one embodiment, the link 148 includes a body 149 and a torsion spring 150. The body 149 is disposed through the connecting hole 152 and the first sliding slot 142, and the torsion spring 150 is sleeved outside the body 149. The two ends of the torsion spring 150 are respectively matched with the first connecting rod 141 and the second connecting rod 143, and when the first connecting rod 141 rotates relative to the second connecting rod 143, the torsion spring 150 drives the body 149 to slide in the first sliding slot 142.

Specifically, the two ends of the torsion spring 150 are provided with hooks 151. The hook 151 close to the first link 141 abuts against a surface of the first link 141 away from the second link 143, and the hook 151 close to the second link 143 abuts against a surface of the second link 143 away from the first link 141. When the first link 141 rotates relative to the second rail 143, the torsion spring 150 receives the pulling force of the first link 141 and the second link 143, and the torsion spring 150 has elasticity, so as to drive the body 149 to slide in the first sliding slot 142.

Optionally, the torsion spring 150 can be matched with the first link 141 and the second link 143 by winding or other fixing methods of the two ends of the torsion spring 150 around the first link 141 and the second link 143, as long as the body 149 can be driven to slide in the first sliding groove 142. Of course, the torsion spring 150 can be replaced by other suitable elastic materials as long as the body 149 can be driven to slide in the first sliding groove 142.

In one embodiment, the bracket 110 includes a first connection portion 111 and a second connection portion 112, and the base 120 includes a third connection portion 121 and a fourth connection portion 122. The second connecting portion 112 is rotatably connected to the linkage assembly 130 and the first connecting rod 141, and the linkage assembly 130 and the first connecting rod 141 are disposed on a side of the second connecting portion 112 close to the fourth connecting portion 122. The fourth connecting portion 122 is rotatably connected to the linkage assembly 130 and the second connecting rod 143, and the linkage assembly 130 and the second connecting rod 143 are disposed on one side of the fourth connecting portion 122 close to the second connecting portion 112. When the check hinge 100 is closed, as shown in fig. 4, the first connection portion 111 partially overlaps the third connection portion 121, and the second connection portion 112 partially overlaps the fourth connection portion 122. The linkage assembly 130 and the limiting assembly 140 are both located between the second connecting portion 112 and the fourth connecting portion 122.

In one embodiment, the linkage assembly 130 includes a first linkage rod 131, a second linkage rod 132, and a third linkage rod 133. One end of the first linkage rod 131 is rotatably connected with the middle of the fourth connecting portion 122, and the other end of the first linkage rod 131 is rotatably connected with the middle of the second linkage rod 132. One end of the second link rod 132 is rotatably connected to the fourth connecting portion 122, and the other end thereof is rotatably connected to one end of the third link rod 133. The other end of the third link rod 133 is rotatably connected to the middle of the second connecting portion 112. When the supporting arm 110 rotates relative to the base 120, the first linkage rod 131, the second linkage rod 132 and the third linkage rod 133 are driven to move, so that force transmission is realized.

Alternatively, the linkage assembly 130 may be configured in other structures, for example, other suitable connection manners are adopted among three linkage rods, or other numbers of linkage rods are adopted to transmit force, as long as the bracket arm 110 can rotate relative to the base 120 to transmit force.

It is understood that the rotation fulcrum of the second link 143 and the fourth link 122 is far away from the rotation fulcrum of the second link 132 and the fourth link 122, and the rotation fulcrum of the first link 141 and the second link 112 is also far away from the rotation fulcrum of the third link 133 and the second link 112. The condition that the linkage assembly 130 and the limiting assembly 140 interfere with each other in the process of opening and closing the limiting hinge 100 is avoided.

In one embodiment, the check hinge 100 further includes an adjustment member 160 and an adjustment screw 164. The adjusting screw 164 penetrates through the fourth connecting portion 122 and the adjusting member 160 to fix the adjusting member 160 to the middle portion of the fourth connecting portion 122. One end of the first linkage rod 131 is rotatably connected with the adjusting part 160, and is rotatably connected with the middle part of the fourth connecting part 122 through the adjusting part 160 and is partially positioned between the adjusting part 160 and the fourth connecting part 122.

Specifically, the adjusting member 160 includes a first step portion 161, a second step portion 162, and a connecting portion 163, and the first step portion 161 and the second step portion 162 are fixedly connected by the connecting portion 163. The first linkage rod 131 is rotatably connected with the first step portion 161, the adjusting screw 164 penetrates through the second step portion 162, and the second step portion 162 is closer to the fourth connecting portion 122 than the first step portion 161. Adjusting the adjustment screw 164 moves the adjustment member 160 toward or away from the fourth connecting portion 122. When the adjusting screw 164 is adjusted to make the adjusting member 160 away from the fourth connecting portion 122, a gap is formed between the second step portion 162 and the fourth connecting portion 122, and a gap is also formed between the first linkage rod 131 and the fourth connecting portion 122. At this time, the friction between the first linkage rod 131 and the fourth connecting portion 122 is minimized when the first linkage rod rotates. When the adjusting screw 164 is adjusted to move the adjusting member 160 toward the direction close to the fourth connecting portion 122 until the second step portion 162 is tightly abutted against the fourth connecting portion 122, the first linkage rod 131 is also abutted against the fourth connecting portion 122. At this time, the friction between the first linkage rod 131 and the fourth connecting portion 122 is the largest when rotating, and a larger force is needed to push the limiting hinge 100 to open and close.

In one embodiment, as shown in fig. 7, a second sliding slot 123 is formed in the fourth connecting portion 122, an extending direction of the second sliding slot 123 is the same as an extending direction of the fourth connecting portion 122, and the adjusting screw 164 penetrates through the second sliding slot 123. When the first linkage rod 131 rotates relative to the first step portion 161, the adjustment screw 164 is driven to slide in the second sliding slot 123, so that the adjustment member 160 slides along the extending direction of the fourth connecting portion 122. With this arrangement, when the adjusting screw 164 is adjusted to form a gap between the second step portion 162 and the fourth connecting portion 122, the friction force of the second step portion 162 sliding relative to the fourth connecting portion 122 is small. When the adjusting screw 164 is adjusted to make the second step portion 162 and the fourth connecting portion 122 tightly abut against each other, the friction force of the second step portion 162 sliding relative to the fourth connecting portion 122 is large, and a larger force is needed to push the limiting hinge 100 to open and close. The adjusting member 160, the adjusting screw 164 and the second sliding groove 123 are arranged, so that the friction force of the first linkage rod 131 rotating relative to the fourth connecting portion 122 and the adjusting member 160 sliding relative to the fourth connecting portion 122 can be adjusted. When needs make children can't open door and window structure 200, make second step portion 162 and the inseparable butt of fourth connecting portion 122, frictional force is bigger, needs bigger power can realize opening and shutting of spacing articulated 100, and children can't open door and window structure 200 this moment, uses safelyr.

Referring to fig. 2 and 4, in one embodiment, one end of the second connecting portion 112 close to the third connecting portion 121 extends outward to form an anti-picking protrusion 125, and the third connecting portion 121 is formed with an anti-picking groove 124. The anti-pry tab 125 is adapted to the anti-pry slot 124. as shown in fig. 4, when the check hinge 100 is closed, the anti-pry tab 125 is positioned within the anti-pry slot 124. With such an arrangement, when the door/window structure 200 is closed, the bracket 110 and the base 120 are not easily pried apart, so that the limit hinge 100 has a prying-resistant function.

Optionally, the shape of the anti-prying protrusion 125 is not limited, and may be any suitable shape such as a triangle, a rectangle, etc., and the shape of the anti-prying groove 124 is adaptively adjusted according to the shape of the anti-prying protrusion 125, so that the anti-prying protrusion 125 can be inserted into the anti-prying groove 124. Of course, the anti-prying protrusion 125 and the anti-prying groove 124 can be disposed at other suitable positions, for example, the anti-prying protrusion 125 is disposed on a side surface of the first connecting portion 111 close to the third connecting portion 121, so long as the anti-prying groove 124 is opposite to the anti-prying protrusion 125, and the anti-prying protrusion 125 is inserted into the anti-prying groove 124 when the limiting hinge 100 is closed.

In one embodiment, as shown in fig. 2, the body 149 and the locking member 146 are rivets, and the first link 141 is rotatably connected to the second connecting portion 112 by the rivets. A gasket 165 is further arranged between the first connecting rod 141 and the second connecting part 112, so that abrasion is reduced. The position limiting assembly 140 further includes a spacer 166, and the body 149 sequentially penetrates through the connecting hole 152, the first sliding groove 142 and the spacer 166, so that the first connecting rod 141 and the second connecting rod 143 are rotatably connected.

Referring to fig. 8 and 9, a door and window structure 200 includes a sash portion 210, a frame portion 220 and the above-mentioned check hinge 100. The frame portion 220 is fixed to the building base, and the fan portion 210 is rotatably connected to the frame portion 220. Specifically, the sector 210 is rotatably connected to a portion of the frame 220 in the vertical direction, and when the door and window structure 200 is opened and closed, the sector 210 rotates relative to the portion of the frame 220 in the vertical direction.

In one embodiment, the first connecting portion 111 is substantially perpendicular to the second connecting portion 112, and both the first connecting portion 111 and the second connecting portion 112 are fixedly connected to the fan portion 210. One side surface of the first connecting portion 111 away from the third connecting portion 121 is in contact with one side surface of the fan portion 210, and one side surface of the second connecting portion 112 away from the fourth connecting portion 122 is in contact with the other side surface of the fan portion 210. The third connecting portion 121 and the fourth connecting portion 122 are substantially perpendicular to each other, and both the third connecting portion 121 and the fourth connecting portion 122 are fixedly connected to the frame portion 220. One side surface of the third connection portion 121 away from the first connection portion 111 is in contact with one side surface of the frame portion 220, and one side surface of the fourth connection portion 122 away from the second connection portion 112 is in contact with the other side surface of the frame portion 220. It is understood that the check hinge 100 is located between the sector 210 and the frame 220 when the door window structure 200 is closed.

Alternatively, the first connecting portion 111 and the third connecting portion 121 may be omitted, and the anti-prying groove 124 may be opened at a position on the frame portion 220 opposite to the anti-prying bump 125. The first connecting portion 111 and the third connecting portion 121 are provided to reinforce the connection between the check hinge 100 and the door and window structure 200, and facilitate the installation of the anti-prying groove 124.

When the door/window structure 200 needs to be limited by the limiting hinge 100, the locking member 146 is in a locked state, as shown in fig. 6, when the door/window structure 200 is opened and the limiting hinge 100 is driven to move to the position where the first connecting rod 141 and the second connecting rod 143 are aligned, the door/window structure 200 cannot be opened at a larger angle due to the limitation of the limiting component 140. The maximum opening angle is determined by the lengths of the first link 141 and the second link 143. When the door window structure 200 needs to be opened at a larger angle, the locking member 146 is in an open state, as shown in fig. 9, the second connecting rod 143 is separated from the fourth connecting portion 122, the limiting component 140 no longer limits the maximum opening angle of the limiting hinge 100, the limiting hinge 100 can be opened at a larger angle, and when the limiting hinge 100 reaches the maximum opening angle, the door window structure 200 opens the maximum opening angle.

Therefore, the above-mentioned limit hinge 100 achieves the technical effect of adjusting the maximum opening angle of the limit hinge 100 by providing the locking member 160.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A check hinge, comprising:

2. The check hinge of claim 1, wherein one end of the locking member is pivotally connected to the base and extends away from the base, and the second link is movable in the direction of extension of the locking member and out of engagement with the base when the locking member is in the open position.

3. The limit hinge as claimed in claim 2, wherein the second link has a first locking hole, the locking member passes through the first locking hole, a sidewall of the locking member extends outward to form a locking block, the second link has a second locking hole communicating with the first locking hole, the second locking hole is adapted to the locking block, when the locking member is in the locking state, the locking block is staggered from the second locking hole to block the second link from being disengaged from the locking member, and when the locking member is in the opening state, the locking block overlaps with the second locking hole to allow the second link to be disengaged from the locking member.

4. The check hinge of claim 3, wherein when the locking member is in the locked state, the second link abuts the base, and the locking block abuts a side of the second link away from the base.

5. The limit hinge according to claim 1, wherein the limit assembly further comprises a connecting member, the first connecting rod is provided with a first sliding groove, the second connecting rod is provided with a connecting hole, and the connecting member penetrates through the connecting hole and the first sliding groove to enable the first connecting rod and the second connecting rod to be rotatably connected and to slide along the first sliding groove.

6. The limit hinge according to claim 5, wherein the connecting member comprises a body and a torsion spring, the body is disposed through the connecting hole and the first sliding groove, the torsion spring is sleeved outside the body, two ends of the torsion spring are respectively engaged with the first connecting rod and the second connecting rod, and when the first connecting rod rotates relative to the second connecting rod, the torsion spring drives the body to slide in the first sliding groove.

7. The limit hinge according to claim 1, further comprising an adjusting member and an adjusting screw, wherein the adjusting screw penetrates through the base and the adjusting member to fix the adjusting member on the base, the linkage assembly comprises a first linkage rod, and the first linkage rod is rotatably connected with the adjusting member and partially located between the adjusting member and the base.

8. The limit hinge according to claim 7, wherein the base has a second sliding slot, the adjusting screw penetrates through the second sliding slot, and when the first linkage rod rotates relative to the adjusting member, the adjusting member drives the adjusting screw to slide in the second sliding slot.

9. The check hinge of claim 1, wherein the bracket is provided with a prying-resistant protrusion, the base is provided with a prying-resistant groove, the prying-resistant groove is matched with the prying-resistant protrusion, and the prying-resistant protrusion is positioned in the prying-resistant groove when the door and window structure is closed.

10. A door and window structure comprising a sash portion, a frame portion and the check hinge of any one of claims 1-8, wherein the frame portion is fixed to a building substrate, and the sash portion is pivotally connected to the frame portion.