Heavy type inward-opening backward-rotating 90-degree invisible hinge

Abstract

The utility model discloses a heavy type inward-opening backward-rotating 90-degree invisible hinge which comprises a fixed seat piece, the surface of one end of the fixed seat piece is movably connected with a gravity swing arm through a movable thickened rotating block, the gravity swing arm is used for supporting opening and closing of doors and windows, and the gravity swing arm is movably connected with a connecting wall through a connecting rod arm in the middle of a telescopic wall arm rod. The connecting arm is linked with the surface of one end of the fixed seat part, the connecting arm is movably connected with the gravity swing arm, and the gravity swing arm is movably connected with the telescopic arm rod, so that the window frame can bear heavy stress, and the whole hinge is uniformly stressed to move towards the inner side of the fixed seat part; therefore, under the condition that the telescopic arm rod is subjected to inward closing pulling force of the window frame, the connecting arm, the gravity swing arm and the telescopic arm rod are linked, the rotating shaft distance between the connecting arm and the gravity swing arm is shorter through rotation of the thickened rotating block, the stress coefficient of the telescopic arm rod can be increased through shortening of the rotating shaft distance, and the window frame can be closed more stably. And therefore, the telescopic arm rod cannot be deformed under the condition of heavy stress.

Description

Technical Field

[0001] The utility model belongs to the technical field of hinges, and in particular relates to a heavy-duty inward-opening rear-rotating 90-degree invisible hinge. Background Art

[0002] Hinges are widely used in doors and windows. They are essential accessories and play a huge role in doors and windows. They are the heart of doors and windows and the key to supporting the performance of doors and windows. Hinges are used to hang doors and windows to achieve free rotation of doors and windows. At the same time, they provide a buffer function when the door leaf is opened and closed to reduce noise and friction. The existing door and window hinges can adjust their height up and down to facilitate the assembly of the hinges, but their stability is not high, which makes it easy for the window leaf to shift after opening and closing at a certain angle under the action of external forces such as wind and rain.

[0003] To this end, an inward-opening and inward-tilting upper and lower hinge with a bulletin number of "CN218347171U" includes an upper hinge and a lower hinge, wherein the lower hinge includes a lower fixed plate, a lower hinged plate rotatably connected to the middle of the lower fixed plate, and a lower serpentine plate slidably connected to one side of the lower fixed plate, and a lower pressure plate is installed and connected to the front side of the upper end of the lower hinged plate; the upper hinge includes an upper fixed plate, an upper hinged plate rotatably connected to the middle of the upper fixed plate, and an upper serpentine plate slidably connected to the upper fixed plate, and a diagonal rod is provided at the lower end of the upper hinged plate. The upper end of the junction of the window frame and the window sash is connected by the upper hinge, and the lower end of the junction of the window frame and the window sash is connected by the lower hinge, so that the window sash can be opened inward flatly or tilted inward to be opened, which is convenient and practical; by adjusting the tightness between the respective structures of the lower hinge and the upper hinge, the window sash can be opened and closed at any angle position of the window frame without being easily displaced.

[0004] However, for the above-mentioned inward-opening and inward-tilting upper and lower hinges, although the lower hinge plate and the lower fixed plate and the lower serpentine plate and the lower hinge plate rotate, and the lower serpentine plate and the lower fixed plate and the lower pressure plate and the lower serpentine plate slide, so that the window sash can be tilted inward and opened, there are still the following obvious defects during use: due to the long rotational wheelbase of the connection between the lower serpentine plate and the lower pressure plate, when the doors and windows are subjected to heavy stress, the hinge as a whole is unevenly stressed, and only the lower pressure plate is stressed alone, which will cause the lower pressure plate to deform and become unstable when the doors and windows are subjected to greater stress. Utility Model Content

[0005] The purpose of the utility model is to provide a heavy-duty inward-opening 90° rear-rotating invisible hinge to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above purpose, the utility model provides the following technical solution: a heavy-duty inward-opening rear-rotating invisible hinge, comprising:

[0007] A fixed seat, one end surface of which is movably connected to a gravity swing arm for supporting the opening and closing of doors and windows through a movable thickened rotating block, and the other end surface of which is movably connected to a connecting arm linked to the gravity swing arm through a pin shaft;

[0008] A telescopic arm, wherein a connecting rod arm movably connected to one end of the connecting arm is connected by a pin near the center position of the telescopic arm, one end of the telescopic arm is movably connected to an end of an outer corner of a gravity swing arm by a pin, and the other end of the telescopic arm is provided with a connecting block for connecting to a product.

[0009] Preferably, the surface of the fixed seat is located away from the installation position of the thickened rotating block and is provided with an arc-shaped travel groove, and a connecting column is provided in the travel groove for limiting sliding. One end of the connecting column passes through the travel groove and is movably connected with the thickened rotating block and one end of the gravity swing arm, so that the connecting arm can utilize the thickened rotating block under the heavy pressure of the telescopic rod arm to withstand the inward heavy pressure, thereby strengthening the supporting strength of the telescopic arm rod to the window frame.

[0010] Preferably, a fixing screw hole for installing and fixing the fixed seat is penetrated on one side of the center position of the fixed seat, and a positioning screw is provided on the edge surface of the fixed seat, which strengthens the stable support of the gravity swing arm on the telescopic arm and restricts the weighted rotating block to avoid excessive inward movement.

[0011] Preferably, a connecting pin is provided at one end of the side of the connecting arm, and the connecting pin is movably connected to the outer side of one end of the gravity swing arm, and the connecting pin is located at one end on the back side of the fixed seat and is provided with a limiting plate for limiting the inward movement and folding of the thickened rotating block and the gravity swing arm.

[0012] Preferably, an open locking groove is provided at one end of the connecting block, and one end of the telescopic arm is connected to the inner end of the connecting block and is locked and fixed by a screw, so that the connection between the connecting block and the window frame is more stable and firm through the linkage support of the telescopic arm and the gravity swing arm.

[0013] Compared with the prior art, the technical effects and advantages of the utility model are as follows: the heavy-duty inward-opening 90° rear-rotating invisible hinge is movably connected to the connecting rod arm in the middle of the telescopic wall arm and the connecting wall, and the connecting arm is linked with the surface of one end of the fixed seat, and the connecting arm is movably connected with the gravity swing arm. At the same time, the gravity swing arm is movably connected to the telescopic arm, and the other end of the gravity swing arm is linked with the thickened rotating block and the connecting pin through the stroke groove, so that the window frame can be opened in an overall rearward rotating manner through the linkage of the above-mentioned components, so that the window frame can withstand heavy force and the hinge can be evenly forced to move toward the inside of the fixed seat as a whole, so that the telescopic arm can be subjected to the pulling force of the window frame to close inward, and the connecting arm and the gravity swing arm are linked with the telescopic arm, so that the thickened rotating block is rotated to shorten the rotational wheelbase between the connecting arm and the gravity swing arm. The shortening of the rotational wheelbase can increase the force coefficient of the telescopic arm, so that the telescopic arm will not be deformed under heavy force, and the safety of the hinge in bearing heavy force is further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model;

[0015] Figure 2 It is a rear view structural schematic diagram of the utility model.

[0016] In the figure: 1. fixed seat; 2. thickened rotating block; 3. gravity swing arm; 4. connecting arm; 5. telescopic arm; 6. connecting rod arm; 7. connecting block; 8. travel groove; 9. connecting column; 10. fixing screw hole; 11. positioning screw; 12. connecting pin shaft; 13. open locking groove. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] See also Figure 1-2 The utility model provides a technical solution: a heavy-duty inward-opening 90° rear-rotating invisible hinge, comprising:

[0019] A fixed seat 1, one end surface of the fixed seat 1 is movably connected to a gravity swing arm 3 for supporting the opening and closing of doors and windows through a movable thickened rotating block 2, so that when the telescopic arm 5 moves inward, one end of the telescopic arm 5 uses a movable pin to pull the gravity swing arm 3 forward and move into the fixed seat 1, thereby reducing the deformation of the telescopic arm 5 due to a large force. The other end surface of the fixed seat 1 is movably connected to a connecting arm 4 linked to the gravity swing arm 3 through a pin. The connecting arm 4 plays a role of active support when the telescopic arm 5 is folded and moved inward, and the telescopic arm 5 is prevented from being deformed by a single force by the linkage of the connecting arm 4 and the connecting rod arm 6;

[0020] The telescopic arm 5 is movably connected to a connecting rod arm 6 movably connected to one end of the connecting arm 4 through a pin near the center position of the telescopic arm 5. The telescopic arm 5 is subjected to force when the window frame is closed. The middle part of the telescopic arm 5 is movably supported by the connecting rod arm 6, which can reduce the force on the telescopic arm 5. One end of the telescopic arm 5 is movably connected to one end of the outer corner of the gravity swing arm 3 through a pin. During the inward movement, one end of the telescopic arm 5 is linked with the gravity swing arm 3, so that the gravity swing arm 3 produces a certain inward buffering support force on the telescopic arm 5, so that the telescopic arm 5 maintains stability during the inward movement and hiding process. The other end of the telescopic arm 5 is provided with a connecting block 7 for connecting with the product, so that the connecting block 7 is connected to the window frame, and the gravity swing arm 3 is connected with the connecting arm 4 and the connecting rod arm 6 to achieve inward opening and then rotate 90 degrees for hiding.

[0021] The surface of the fixed seat 1 is located away from the surface of the installation position of the thickened rotating block 2 and is provided with an arc-shaped stroke groove 8, which can enable the gravity swing arm 3 to slide in the stroke groove 8 through the thickened rotating block 2 under the pulling of one end of the telescopic arm rod 5, so that the connecting arm 4 can be moved inward and hidden in the fixed seat 1, and there is a connecting column 9 in the stroke groove 8 for limiting sliding, which can make one end of the thickened rotating block 2 move at an angle, so that the gravity swing arm 3 can be moved backward and hidden after the telescopic arm rod 5 moves inward and is pulled and hidden. One end of the connecting column 9 passes through the stroke groove 8 and is movably connected with one end of the thickened rotating block 2 and the gravity swing arm 3, so that the telescopic arm rod 5 and the gravity swing arm 3 can reach 90 degrees. A fixing screw hole 10 for installing and fixing the fixed seat 1 is penetrated on one side of the center position of the fixed seat 1, and a positioning screw 11 is provided on the edge end surface of the fixed seat 1 for fixing the fixed seat 1 at a specified position on the inner side of the window frame.

[0022] A connecting pin 12 is provided at one end of the side of the connecting arm 4, which can support the gravity swing arm 3 when it is under stress, so that the gravity swing arm 3 can support the telescopic arm 5 to the maximum extent. The connecting pin 12 is movably connected to the outer side of one end of the gravity swing arm 3, and an open locking groove 13 is provided at one end of the connecting block 7. One end of the telescopic arm 5 is connected to the inner end of the connecting block 7 and is locked and fixed by screws, so that the hinge and the window frame can be installed and disassembled.

[0023] Specifically, when in use, during the process of closing the window frame inward with maximum force, one end of the telescopic arm rod 5 moves inward, and the other end of the telescopic arm rod 5 pulls the gravity swing arm 3 upward and forward, and at the same time, the other end of the gravity swing arm 3 rotates and moves in the stroke groove 8 of the arc structure through the thickened rotating block 2 using the connecting column 9, and the movement of the gravity swing arm 3 drives the connecting arm 4 to fold and move inward, and the connecting rod arm 6 at one end of the connecting arm 4 follows the telescopic arm rod 5 to fold and move inward, and the connecting rod arm 6 plays a role of supporting the center of the telescopic arm 5. After the telescopic arm 5 is hidden and folded to a certain angle, the end of the gravity swing arm 3 connected to the thickened rotating block 2 moves downward at an angle, and the thickened rotating block 2 is fixed at a fixed position. The seat 1 moves up so that one side of it is flush with one side of the rear fixed seat 1, and at the same time, the connecting column 9 follows and moves back to the initial state in the stroke groove 8, so that the window frame can withstand heavy force and the hinge as a whole is evenly stressed and moves toward the inside of the fixed seat 1, so that the telescopic arm 5 can be subjected to the pulling force of the window frame to close inward, and the connecting arm 4 and the gravity swing arm 3 are linked with the telescopic arm 5, so that the thickened rotating block 2 rotates to shorten the rotational wheelbase between the connecting arm 4 and the gravity swing arm 3. The shortening of the rotational wheelbase can increase the force coefficient of the telescopic arm 5, so that the telescopic arm 5 will not be deformed under heavy force, and the safety of the hinge in bearing heavy force is further improved.

[0024] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A heavy-duty inward-opening 90° rear-rotating invisible hinge, characterized in that: include: A fixed seat (1), one end surface of the fixed seat (1) is movably connected to a gravity swing arm (3) for supporting the opening and closing of doors and windows through a movable thickened rotating block (2), and the other end surface of the fixed seat (1) is movably connected to a connecting arm (4) linked to the gravity swing arm (3) through a pin shaft; A telescopic arm (5), wherein the telescopic arm (5) is connected to a connecting rod arm (6) movably connected to one end of a connecting arm (4) via a pin near the center position, one end of the telescopic arm (5) is movably connected to one end of an outer corner of a gravity swing arm (3) via a pin, and the other end of the telescopic arm (5) is provided with a connecting block (7) for connecting to a product.

2. The heavy-duty inward-opening 90° rear-rotating invisible hinge according to claim 1, characterized in that: The surface of the fixed seat (1) is provided with an arc-shaped travel groove (8) on the surface away from the installation position of the thickened rotating block (2), and a connecting column (9) is limitedly slidable in the travel groove (8), and one end of the connecting column (9) passes through the travel groove (8) and is movably connected with the thickened rotating block (2) and one end of the gravity swing arm (3).

3. The heavy-duty inward-opening 90° rear-rotating invisible hinge according to claim 1, characterized in that: A fixing screw hole (10) for installing and fixing the fixing seat (1) is provided through one side of the center of the fixing seat (1), and a positioning screw (11) is provided on the side surface of the fixing seat (1).

4. The heavy-duty inward-opening 90° rear-rotating invisible hinge according to claim 1, characterized in that: A connecting pin shaft (12) is provided at one end of the side of the connecting arm (4), and the connecting pin shaft (12) is movably connected to the outer side of one end of the gravity swing arm (3).

5. The heavy-duty inward-opening 90° rear-rotating invisible hinge according to claim 1, characterized in that: One end of the connection block (7) is provided with an open locking groove (13), and one end of the telescopic arm (5) is connected to the inner end of the connection block (7) and is locked and fixed by means of screws.

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