Outward-opening top-hung lower hinge

Abstract

The utility model belongs to the technical field of doors and windows, and provides an outward-opening top-hung lower hinge which comprises a frame fixing plate, a sash fixing seat, a linkage rod, a connecting rod assembly, a connecting rod seat and a limiting assembly. The limiting assembly comprises a sliding seat, a limiting block and an elastic element; the sliding seat is slidably arranged on the connecting rod seat; the connecting rod assembly is simultaneously connected with the frame fixing plate and the connecting rod seat; one end of the connecting rod assembly is hinged with the sliding seat; a first limiting hole and a second limiting hole are formed in the outer side of the connecting rod seat, and the limiting block is provided with a clamping boss; the elastic force of the elastic element always promotes the clamping boss of the limiting block to abut against the outer side wall of the connecting rod seat; a first hook and a second hook are respectively arranged on the limiting block and the sliding seat; an unlocking part protruding inwards is arranged on the side, away from the first limiting hole, of the second limiting hole, and a reset part is arranged on the side, away from the second limiting hole, of the first limiting hole. The safety protection device plays a role in safety protection on the window sash in a top-hung open state, and is beneficial to preventing the window sash from being closed accidentally.

Description

Technical Field

[0001] The invention belongs to the technical field of doors and windows, and in particular relates to an outward-opening top-hung bottom hinge. Background Art

[0002] The outward-opening top-hung window is a relatively new product on the market. The window sash can be opened horizontally or hung from the upper side. When the window sash is opened horizontally, it has a larger opening angle, which is conducive to air convection; when the window sash is opened from the upper side, it can maintain ventilation while preventing rain from drifting in. This type of window has good flexibility and users can open and use it according to actual needs. It is becoming more and more popular among the public.

[0003] The outward-opening top-hung windows or top-hung windows in the prior art, when the window sash is hung and opened, mainly rely on the friction of the hinge itself to maintain the top-hung open posture, and the hinge lacks a limit structure to prevent the window sash from accidentally closing. Under the action of strong winds or unexpected external forces, the window sash is easy to close inwards, which poses a safety hazard. Therefore, it is necessary to propose a new lower hinge structure with a limit structure to improve the safety of the window sash when it is hung and opened. Summary of the invention

[0004] In order to overcome the above-mentioned shortcomings of the prior art, an object of the present invention is to provide an outward-opening upper-hung lower hinge, wherein the lower hinge has an upper-hung limiting structure, which plays a safety protection role for the window sash in the upper-hung open state and helps prevent the window sash from closing accidentally.

[0005] The technical solution adopted by the present invention to solve its technical problem is:

[0006] An outward-opening top-hung bottom hinge comprises a frame fixing plate, a sash fixing seat, a linkage rod, a connecting rod assembly, a connecting rod seat and a limit assembly; the frame fixing plate is fixed to the window frame, the sash fixing seat is arranged on the connecting rod seat and is used for fixed connection with the window sash; the linkage rod is slidably arranged on the connecting rod seat;

[0007] The limiting assembly includes a sliding seat, a limiting block and an elastic element;

[0008] The slide seat is slidably arranged on the connecting rod seat; the connecting rod assembly is connected to the frame fixing plate and the connecting rod seat at the same time, and one end of the connecting rod assembly is hinged to the slide seat;

[0009] The outer side of the connecting rod seat is provided with a first limiting hole and a second limiting hole, the limiting block is provided with a locking boss, one side of the locking boss in the window opening direction is an inclined guide surface, and one side of the locking boss in the window closing direction is a locking surface engaged with the first limiting hole and the second limiting hole; when the locking boss is embedded in the first limiting hole, the window sash is in a closed state, and when the locking boss is embedded in the second limiting hole, the window sash is in an upper hanging open state;

[0010] The elastic force of the elastic element always urges the locking boss of the limit block to press against the outer wall of the connecting rod seat; the limit block and the sliding seat are respectively provided with a first hook and a second hook, and the first hook and the second hook are separated and opposite to each other under normal conditions; an unlocking portion protruding inwardly is provided on the side of the second limit hole away from the first limit hole, and a reset portion is provided on the side of the first limit hole away from the second limit hole.

[0011] In a preferred embodiment of the present invention, the unlocking portion is arranged in an arc;

[0012] The slide seat is provided with a cavity, the limit block is located in the cavity, and when the limit block is installed in the cavity, there is a sliding gap for the limit block to move along the length direction of the slide seat;

[0013] When the window sash in the upper hanging open state is pushed outward continuously, the limit block leaves the second limit hole and moves to the unlocking portion. Under the squeezing action of the unlocking portion, the limit block overcomes the elastic force of the elastic element and moves in the cavity to realize the mutual engagement of the first hook and the second hook.

[0014] Preferably, one end of the limit block is in an arc shape, and the cavity is provided with a portion corresponding to the end also in an arc shape.

[0015] Preferably, a sliding cavity is provided on the connecting rod seat, a first sliding groove is provided on the sliding cavity, and the connecting rod assembly is rotatably connected to the sliding seat through rivets;

[0016] The limiting assembly is arranged in the sliding cavity, and one end surface of the sliding cavity constitutes the resetting portion.

[0017] Preferably, the limit block is provided with an extension portion, and the extension portion extends beyond the first hook and the second hook; during the window closing process, the reset portion blocks the extension portion to cause the first hook on the limit block to disengage from the second hook, so as to achieve the reset of the limit block.

[0018] Preferably, the elastic element is located between a side of the limiting block away from the first limiting hole and the second limiting hole and an inner wall of the cavity.

[0019] In a preferred embodiment of the present invention, the connecting rod assembly comprises a first support arm, a second support arm, a first diagonal tie rod and a second diagonal tie rod;

[0020] The first ends of the first support arm and the second support arm are both hinged to the frame fixing plate, the second end of the first support arm is hinged to the first inclined rod and is slidable, the second end of the second support arm is hinged to the first end of the second inclined rod, and a hinge point is provided between the first support arm and the second support arm;

[0021] The second end of the first oblique tie rod is hinged to the sliding seat; the first end of the second oblique tie rod is hinged to the first oblique tie rod, and the second end of the second oblique tie rod is hinged to the connecting rod seat.

[0022] Preferably, a connector is provided at one end of the linkage rod, the connector is provided with a second slide groove with a hollow bottom, and a notch is provided at one end of the second slide groove away from the linkage rod;

[0023] The first inclined rod is provided with a locking piece corresponding to the connecting head, and the locking piece is matched and embedded in the second sliding groove; when the transmission mechanism of the window is adjusted to the horizontal opening state, the second sliding groove of the connecting head cooperates with the locking piece, so that the first inclined rod and the connecting rod seat are integrated; when the transmission mechanism of the window is adjusted to the upper hanging state, the notch of the connecting head cooperates with the locking piece, so that the first inclined rod can be separated from the connecting rod seat so as to achieve the horizontal opening of the window sash.

[0024] In a preferred embodiment of the present invention, the end of the connector away from the linkage rod is connected to a latch assembly; the end of the frame fixing plate is provided with a vertical sheet, and the vertical sheet is provided with a socket matching the latch assembly;

[0025] In the window closing state, the linkage rod is controlled to move by the transmission mechanism to cause the end of the latch assembly to be inserted into the insertion hole.

[0026] Preferably, the latch assembly comprises a latch seat, a latch head and a spring sheet, wherein the spring sheet and the latch head are respectively connected to the two ends of the latch seat and are extended out, and the spring sheet is provided with a mounting hole; the connecting head is provided with a beveled protrusion, and the beveled protrusion can cooperate with the mounting hole to realize the assembly of the latch assembly and the connecting head.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] In the outward-opening upper-hung lower hinge of the utility model, the limit assembly is set so that when the window sash is in the upper-hung open state, the stop block cannot move to one side of the window closing direction under the action of the stop surface of the stop boss and the second stop hole, thereby limiting the accidental closing of the window sash and improving safety. When the window sash in the upper-hung state needs to be closed, it is first pushed outward a short distance and then closed inward, which is simple, safe and reliable to operate.

[0029] Specifically, when opening the window sash in an upward hanging posture, the connecting rod assembly pulls the slide to move, and since a guide surface is provided on the locking boss, the locking boss of the limit block moves from the first limiting hole to the second limiting hole, completing the window opening and effectively preventing the window sash from closing accidentally under the action of the locking boss. When it is necessary to close the window sash in the upper hanging posture, the window sash is pushed outward first, and the connecting rod assembly pulls the sliding seat to continue to move to the side of the window opening direction, so that the inclined guide surface of the locking boss passes through the second limit hole and corresponds to the unlocking part, and is squeezed by the unlocking part during the continued movement. Under the squeezing force, the limit block moves inward and to the side of the window closing direction, thereby realizing the mutual engagement of the first hook and the second hook; at this time, the locking boss no longer abuts against the side wall of the connecting rod seat, so the entire limiting structure can move normally to the side of the window closing direction to realize the closing operation of the window sash; and in the process of closing the window, when the limit block is blocked by the resetting part, the limit block moves relative to the sliding seat to the side of the window opening direction and at the same time combines with the elastic force of the elastic element to realize the separation of the first hook and the second hook, and finally the locking boss of the limit block is re-embedded in the first limit hole under the elastic action of the elastic element, completing the closing of the window sash and resetting the limit block. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying any creative work.

[0031] Figure 1 It is a three-dimensional exploded view of the outward-opening upper-hung lower hinge of the utility model in the upper-hung open state.

[0032] Figure 2 It is a top view of the outward-opening upper-hung lower hinge of the utility model in the upper-hung open state.

[0033] Figure 3 It is a three-dimensional diagram of the outward-opening upper-hung lower hinge of the utility model in the upper-hung open state.

[0034] Figure 4 It is a top view of the connecting rod seat, the limit assembly and the door leaf fixing seat of the outward-opening upper hanging lower hinge of the utility model.

[0035] Figure 5 for Figure 4 Schematic diagram after the slide is hidden.

[0036] Figure 6 It is a bottom view of the sliding seat of the outward-opening upper-hung lower hinge of the utility model.

[0037] Figure 7 It is a top view of the limiting block of the outward-opening upper hanging lower hinge of the utility model.

[0038] Figure 8 for Figure 4 A full perspective view of the .

[0039] Fig. 9 It is a three-dimensional diagram of the outward-opening upper-hung lower hinge of the utility model in a horizontally opened state.

[0040] Fig.10 It is a top view of the outward-opening upper-hinged lower hinge of the utility model in a closed state.

[0041] Fig.11 It is a top view of the outward-opening upper-hung lower hinge of the utility model in a closed and locked state.

[0042] in:

[0043] 1- linkage rod;

[0044] 2-connecting rod seat, 201-sliding cavity, 202-first sliding groove, 203-first limiting hole, 204-second limiting hole, 205-resetting part, 206-unlocking part, 207-installing groove;

[0045] 3- fan fixing seat;

[0046] 4-limiting assembly, 401-limiting block, 4011-locking boss, 4012-locking surface, 4013-guide surface, 4014-first hook, 4015-extension portion, 4016-positioning column, 402-sliding seat, 4021-cavity, 4022-second hook, 403-elastic element;

[0047] 5-connector, 501-inclined protrusion, 502-second slide groove, 503-notch;

[0048] 6-Rivets;

[0049] 7-Adjusting screw;

[0050] 8-bolt assembly, 801-bolt seat, 802-spring, 803-bolt head, 804-adjusting pin, 805-mounting hole;

[0051] 9-frame fixing seat, 901-vertical piece, 902-jack;

[0052] 10-connecting rod assembly, 1001-first supporting arm, 1002-second supporting arm, 1003-first diagonal tie rod, 10031-locking piece, 1004-second diagonal tie rod. DETAILED DESCRIPTION

[0053] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other. In the following description, many specific details are set forth in order to fully understand the present invention, and the embodiments described are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in the art without making creative work are within the scope of protection of the present invention.

[0054] 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.

[0055] Example 1

[0056] See also Figure 1-Figure 11 The present embodiment discloses an outward-opening top-hung bottom hinge, which can be applied to windows that can be opened horizontally or top-hung, and the limiting structure, which is one of the main improvement and innovation points of the present embodiment, can also be independently applied to top-hung windows. Among them, the outward-opening top-hung bottom hinge of the present embodiment includes a frame fixing plate 9, a sash fixing seat 3, a linkage rod 1, a connecting rod assembly 10, a connecting rod seat 2 and a limiting assembly 4. The frame fixing plate 9 is fixed to the window frame, the connecting rod seat 2 is set in the groove of the window sash profile, the sash fixing seat 3 is set on the connecting rod seat 2 and is used to be fixedly connected with the window sash; the linkage rod 1 can be slidably set on the connecting rod seat 2.

[0057] See also Figure 5-Figure 8 The limit assembly 4 of this embodiment includes a slide seat 402, a limit block 401 and an elastic element 403. The slide seat 402 is slidably disposed on the connecting rod seat 2; the connecting rod assembly 10 is connected to the frame fixing plate 9 and the connecting rod seat 2 at the same time, and one end of the connecting rod assembly 10 is hinged to the slide seat 402.

[0058] The outer side of the connecting rod seat 2 is provided with a first limiting hole 203 and a second limiting hole 204, and the limiting block 401 is provided with a locking boss 4011. The side of the locking boss 4011 in the window opening direction is an inclined guide surface 4013, and the side of the locking boss 4011 in the window closing direction is a locking surface 4012 that is engaged with the first limiting hole 203 and the second limiting hole 204. The locking surface 4012 and the left sides of the first limiting hole 203 and the second limiting hole 204 can be pressed against each other to prevent sliding; when the locking boss 4011 is embedded in the first limiting hole 203, the window sash is in a closed state, and when the locking boss 4011 is embedded in the second limiting hole 204, the window sash is in an upper hanging open state. The window opening direction in this embodiment refers to the direction in which the limiting block 401 moves on the connecting rod seat 2 when opening the upper hanging window sash, that is, the direction from left to right in the figure; and the window closing direction is the opposite, that is, the direction from right to left in the figure.

[0059] The elastic force of the elastic element 403 in the limiting structure always causes the locking boss 4011 of the limiting block 401 to press against the outer wall of the connecting rod seat 2. The limiting block 401 and the sliding seat 402 are respectively provided with a first hook 4014 and a second hook 4022; in the normal state, that is, when the window sash can continue to be pushed outward, this embodiment specifically refers to the situation where the first hook 4014 and the second hook 4022 are not interlocked with each other, the first hook 4014 and the second hook 4022 are separated and opposite, that is, the first hook 4014 and the second hook 4022 have overlapping positions but are not interlocked with each other, ensuring that the limiting block 401 can be driven to move together when the sliding seat 402 moves in the window closing direction. The second limiting hole 204 is provided with an unlocking portion 206 protruding inwardly on the side away from the first limiting hole 203, and the first limiting hole 203 is provided with a reset portion 205 on the side away from the second limiting hole 204.

[0060] Furthermore, the unlocking portion 206 of the present embodiment is arranged in an arc shape. A cavity 4021 is provided on the side of the slide 402 close to the connecting rod seat 2, and the limit block 401 is located in the cavity 4021. When the limit block 401 is installed in the cavity 4021, there is a sliding gap for the limit block 401 to move along the length direction of the slide 402. When the window sash in the upper hanging open state is pushed outward continuously, the limit block 401 leaves the second limit hole 204 and moves to the unlocking portion 206. Under the squeezing action of the unlocking portion 206, the limit block 401 is forced to overcome the elastic force of the elastic element 403 and move in the cavity 4021 to realize the mutual engagement of the first hook 4014 and the second hook 4022. Specifically, see Figure 5-Figure 8In this embodiment, the guide surface 4013 of the locking boss 4011 corresponds to the unlocking portion 206, and the unlocking portion 206 squeezes the guide surface 4013, prompting the locking boss 4011 to overcome the elastic force of the elastic element 403 and move inward in the window closing direction, so that the first hook 4014 and the second hook 4022 of the limiting block 401 are hooked with each other. At this time, the locking boss 4011 is separated from the outer wall of the connecting rod seat 2, and the locking boss 4011 is no longer restricted by the second limiting hole 204 or the first limiting hole 203, so the window sash can be smoothly pulled inward to complete the window closing action.

[0061] Furthermore, one end of the limit block 401 is in an arc shape, and the cavity 4021 is provided with an arc shape corresponding to the end. With such a design, when the unlocking portion 206 presses the inclined surface of the limit block 401, it is convenient for the limit block 401 to move closer to the second hook 4022, thereby improving the convenience of operation during unlocking.

[0062] In addition, a sliding cavity 201 is provided on the connecting rod seat 2, and a first sliding groove 202 is provided on the sliding cavity 201. The connecting rod assembly 10 is rotatably connected to the sliding seat 402 through a rivet 6; the limiting assembly 4 is arranged in the sliding cavity 201, and one end surface of the sliding cavity 201 constitutes a reset portion 205.

[0063] In order to better allow the stop block 401 to complete the reset during the window closing action, the stop block 401 of this embodiment is provided with an extension portion 4015, and the extension portion 4015 extends beyond the first hook 4014 and the second hook 4022; during the window closing process, the reset portion 205 blocks the extension portion 4015 to cause the first hook 4014 on the stop block 401 to disengage from the second hook 4022, so as to achieve the reset of the stop block 401. The reset of the stop block 401, that is, during the window closing action, after the first hook 4014 on the stop block 401 disengages from the second hook 4022 under the elastic force of the elastic element 403, the locking boss 4011 on the stop block 401 is re-embedded into the first stop hole 203.

[0064] Furthermore, the elastic element 403 is located between the side of the limit block 401 away from the first limit hole 203 and the second limit hole 204 and the inner wall of the cavity 4021. Specifically, the elastic element 403 of this embodiment adopts a spring, and a positioning column 4016 is provided on the limit block 401 for positioning with the spring. In addition, the elastic element 403 of this embodiment can adopt a bent spring sheet 802, one of which cooperates with the limit block 401, and the other cooperates with the inner wall of the cavity 4021 of the slide seat 402; the use of the bent spring sheet 802 makes the elastic force of the limit block 401 more stable and reliable, so that the limit block 401 can be telescopically moved and better pressed against and embedded in the first limit hole 203 or the second limit hole 204.

[0065] See also Figure 1-Figure 3 , Figure 9-11 The connecting rod assembly 10 of this embodiment includes a first arm 1001, a second arm 1002, a first oblique rod 1003 and a second oblique rod 1004; the first ends of the first arm 1001 and the second arm 1002 are both hinged on the frame fixing plate 9, the second end of the first arm 1001 is hinged to the first oblique rod 1003 and can slide, the second end of the second arm 1002 is hinged to the first end of the second oblique rod 1004, and there is a hinge point between the first arm 1001 and the second arm 1002.

[0066] The second end of the first inclined rod 1003 is hinged to the slide 402 ; the first end of the second inclined rod 1004 is hinged to the first inclined rod 1003 , and the second end of the second inclined rod 1004 is hinged to the slide 402 through the rivet 6 to achieve hinge connection with the connecting rod seat 2 .

[0067] Furthermore, a connector 5 is provided at one end of the linkage rod 1, and the connector 5 is provided with a second slide groove 502 with a hollow bottom, and a notch 503 is provided at one end of the second slide groove 502 away from the linkage rod 1. A retaining piece 10031 corresponding to the connector 5 is provided on the first inclined rod 1003, and the retaining piece 10031 is matched and embedded in the second slide groove 502; when the transmission mechanism of the window is adjusted to the horizontal opening state, the second slide groove 502 of the connector 5 cooperates with the retaining piece 10031, so that the first inclined rod 1003 is integrated with the connecting rod seat 2; when the transmission mechanism of the window is adjusted to the upper hanging state, the notch 503 of the connector 5 cooperates with the retaining piece 10031, so that the first inclined rod 1003 can be separated from the connecting rod seat 2 so as to achieve horizontal opening of the window sash.

[0068] Furthermore, the locking member 10031 of this embodiment can adopt a structure such as a pin, a screw, etc., and the extrusion force between the locking member 10031 and the second slide groove 502 can be adjusted to change the friction force when the linkage rod 1 moves, thereby realizing the feel adjustment of the window handle, which has the advantages of convenient adjustment and strong adaptability.

[0069] In addition, the other end of the linkage rod 1 of this embodiment is connected to the transmission mechanism of the window. When adjusting the window sash to open horizontally or to hang up, the linkage rod 1 can be driven to move on the linkage rod seat 2 by twisting the handle, thereby changing the relative position of the connector 5 and the positioning member 10031, thereby realizing the switching control of the window sash to open horizontally and to hang up. The structure of the switching control of the window sash to open horizontally and to hang up in this embodiment can also refer to the prior art.

[0070] Furthermore, the end of the connector 5 away from the linkage rod 1 is connected to the latch assembly 8; the end of the frame fixing plate 9 is provided with a vertical piece 901, and the vertical piece 901 is provided with a socket 902 matching the latch assembly 8. In the window closing state, the linkage rod 1 is controlled to move through the transmission mechanism to cause the end of the latch assembly 8 to be inserted into the socket 902.

[0071] The latch assembly 8 of this embodiment includes a latch seat 801, a latch head 803 and a spring piece 802. The spring piece 802 and the latch head 803 are respectively connected to the two ends of the latch seat 801 and are extended out. The spring piece 802 is provided with a mounting hole 805. The connecting head 5 is provided with an inclined protrusion 501, which can cooperate with the mounting hole 805 to realize the assembly of the latch assembly 8 and the connecting head 5.

[0072] The latch assembly 8 of this embodiment adopts a post-installation design, and the latch assembly 8 can be installed after the lower hinge is installed. During installation, the latch seat 801 is aligned with the connector 5, and the spring piece 802 is inserted to one side of the connector 5 so that the mounting hole 805 on it matches the inclined protrusion 501 on the connector 5, and the installation is completed. Through the setting of the latch assembly 8, when the window is closed, the latch head 803 can match the socket 902 at the end of the frame fixing plate 9, and the latch head 803 is inserted into the socket 902 to form a locked state. This setting can improve the safety of the hinge, that is, the window, and can prevent the window from being pried, play a certain anti-theft function, and also have a certain sealing effect.

[0073] Furthermore, the positioning member 10031 of this embodiment is also set to an eccentric structure. By screwing the positioning member 10031 to adjust its relative position with the connector 5, the telescopic stroke of the linkage rod 1, the connector 5 and the latch assembly 8 can be changed, so that the tightness of the fit between the latch head 803 and the socket 902 can be adjusted to achieve sealing and anti-pry adjustment. Moreover, in this embodiment, an eccentric adjustment pin 804 is also provided between the latch head 803 and the latch seat 801, which can also be used to adjust the position of the latch head 803, so as to achieve multiple adjustments and improve flexibility.

[0074] In this embodiment, an installation groove 207 is provided at the end of the connecting rod seat 2 away from the connecting head 5, and the sash fixing seat 3 is arranged in the installation groove 207. The installation groove 207 is larger than the sash fixing seat 3, and a certain adjustment space is reserved. An adjusting screw 7 is provided between the sash fixing seat 3 and the connecting rod seat 2, and the position of the connecting rod seat 2 in the window sash slot can be adjusted by adjusting the screw 7.

[0075] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Therefore, any modification, equivalent change and modification made to the above embodiment according to the technical essence of the present invention without departing from the technical solution of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. An outward-opening top-hung bottom hinge, characterized in that: It includes a frame fixing plate, a sash fixing seat, a linkage rod, a connecting rod assembly, a connecting rod seat and a limit assembly; the frame fixing plate is fixed on the window frame, the sash fixing seat is arranged on the connecting rod seat and is used to be fixedly connected with the window sash; the linkage rod is slidably arranged on the connecting rod seat; The limiting assembly includes a sliding seat, a limiting block and an elastic element; The slide seat is slidably arranged on the connecting rod seat; the connecting rod assembly is connected to the frame fixing plate and the connecting rod seat at the same time, and one end of the connecting rod assembly is hinged to the slide seat; The outer side of the connecting rod seat is provided with a first limiting hole and a second limiting hole, the limiting block is provided with a locking boss, one side of the locking boss in the window opening direction is an inclined guide surface, and one side of the locking boss in the window closing direction is a locking surface engaged with the first limiting hole and the second limiting hole; when the locking boss is embedded in the first limiting hole, the window sash is in a closed state, and when the locking boss is embedded in the second limiting hole, the window sash is in an upper hanging open state; The elastic force of the elastic element always urges the locking boss of the limit block to press against the outer wall of the connecting rod seat; the limit block and the sliding seat are respectively provided with a first hook and a second hook, and the first hook and the second hook are separated and opposite to each other under normal conditions; an unlocking portion protruding inwardly is provided on the side of the second limit hole away from the first limit hole, and a reset portion is provided on the side of the first limit hole away from the second limit hole.

2. The outward-opening top-hung bottom hinge according to claim 1, characterized in that: The unlocking portion is arranged in an arc; The slide seat is provided with a cavity, the limit block is located in the cavity, and when the limit block is installed in the cavity, there is a sliding gap for the limit block to move along the length direction of the slide seat; When the window sash in the upper hanging open state is pushed outward continuously, the limit block leaves the second limit hole and moves to the unlocking portion. Under the squeezing action of the unlocking portion, the limit block overcomes the elastic force of the elastic element and moves in the cavity to realize the mutual engagement of the first hook and the second hook.

3. The outward opening top hanging bottom hinge according to claim 2 is characterized in that: One end of the limit block is in an arc shape, and the cavity is provided with a portion corresponding to the end which is also in an arc shape.

4. The outward-opening top-hung bottom hinge according to claim 1, characterized in that: The connecting rod seat is provided with a sliding cavity, the sliding cavity is provided with a first sliding groove, and the connecting rod assembly is rotatably connected to the sliding seat through rivets; The limiting assembly is arranged in the sliding cavity, and one end surface of the sliding cavity constitutes the resetting portion.

5. The outward opening top hanging bottom hinge according to any one of claims 1 to 4, characterized in that: The limit block is provided with an extension portion, which extends beyond the first hook and the second hook; during the window closing process, the reset portion blocks the extension portion to cause the first hook on the limit block to disengage from the second hook, thereby realizing the reset of the limit block.

6. The outward opening top hanging bottom hinge according to claim 2 is characterized in that: The elastic element is located between a side of the limiting block away from the first limiting hole and the second limiting hole and an inner wall of the cavity.

7. The outward opening top hanging bottom hinge according to any one of claims 1 to 4 or 6, characterized in that: The connecting rod assembly includes a first support arm, a second support arm, a first oblique tie rod and a second oblique tie rod; The first ends of the first support arm and the second support arm are both hinged to the frame fixing plate, the second end of the first support arm is hinged to the first inclined rod and is slidable, the second end of the second support arm is hinged to the first end of the second inclined rod, and a hinge point is provided between the first support arm and the second support arm; The second end of the first oblique tie rod is hinged to the sliding seat; the first end of the second oblique tie rod is hinged to the first oblique tie rod, and the second end of the second oblique tie rod is hinged to the connecting rod seat.

8. The outward opening top hanging bottom hinge according to claim 7 is characterized in that: A connector is provided at one end of the linkage rod, the connector is provided with a second slide groove with a hollow bottom, and a notch is provided at one end of the second slide groove away from the linkage rod; The first inclined rod is provided with a locking piece corresponding to the connecting head, and the locking piece is matched and embedded in the second sliding groove; when the transmission mechanism of the window is adjusted to the horizontal opening state, the second sliding groove of the connecting head cooperates with the locking piece, so that the first inclined rod and the connecting rod seat are integrated; when the transmission mechanism of the window is adjusted to the upper hanging state, the notch of the connecting head cooperates with the locking piece, so that the first inclined rod can be separated from the connecting rod seat so as to achieve the horizontal opening of the window sash.

9. The outward-opening top-hung bottom hinge according to claim 8, characterized in that: The end of the connector away from the linkage rod is connected with a latch assembly; the end of the frame fixing plate is provided with a vertical sheet, and the vertical sheet is provided with a socket matching the latch assembly; In the window closing state, the linkage rod is controlled to move by the transmission mechanism to cause the end of the latch assembly to be inserted into the insertion hole.

10. The outward-opening top-hung bottom hinge according to claim 9, characterized in that: The latch assembly includes a latch seat, a latch head and a spring sheet, wherein the spring sheet and the latch head are respectively connected to the two ends of the latch seat and are extended out, and a mounting hole is provided on the spring sheet; a beveled protrusion is provided on the connecting head, and the beveled protrusion can cooperate with the mounting hole to realize the assembly of the latch assembly and the connecting head.

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