Concealed hinge

Abstract

The concealed hinge comprises a frame hinge assembly and a leaf hinge assembly, the frame hinge assembly comprises a frame hinge base and a rotating arm, a rotating shaft seat is arranged at one end, far away from the frame hinge base, of the rotating arm, and the rotating arm is connected with the leaf hinge assembly through the rotating shaft seat. The leaf hinge assembly comprises a leaf hinge base, a rotating shaft and a hinge limiting rod, the middle of the rotating shaft penetrates through a rotating shaft base, and the two ends of the rotating shaft are rotationally connected with the leaf hinge base. In actual use, the hinges are respectively fixed on the frame and the sash body by installing the frame hinge base and the sash hinge base. When the fan body rotates, the rotating arm rotates around the rotating shaft, and the hinge limiting rod limits the rotating angle of the rotating arm, namely limits the opening angle of the hinge, so that the fan body can rotate within a safe range, and collision is effectively prevented. By means of the design, the use safety of the concealed hinge is improved, and the service life of the concealed hinge is prolonged.

Description

Technical Field

[0001] This utility model belongs to the field of concealed hinge technology, and specifically relates to a concealed hinge. Background Technology

[0002] A hinge is a mechanical device that connects two objects and allows them to rotate relative to each other about an axis. It is widely used in doors and windows, furniture, industrial equipment, and transportation vehicles (such as train doors and aircraft cargo doors), and is a core component for enabling the opening and closing of parts. Hinges generally consist of a frame hinge assembly and a sash hinge assembly that are rotatably connected to each other. The frame hinge assembly is typically connected to the frame of a door or window, while the sash hinge assembly is typically connected to the sash of a door or window.

[0003] With social progress and technological development, people have higher requirements for the functionality and aesthetics of products. Some shortcomings of traditional hinges have gradually become apparent, and consumers do not want hinges to be exposed and affect the appearance. This has spurred the emergence and development of concealed hinges. The characteristic of concealed hinges is that the hardware is completely hidden and cannot be seen from the outside of the door, making the door more aesthetically pleasing when closed.

[0004] However, existing hinges have some problems during use, such as difficulty in precisely controlling the rotation angle. When the hinge is opened with force, causing the opening angle to be too large, it will cause interference or collision between the hinge and the frame, eventually leading to deformation of the hinge and the frame. In addition, the hinge has a complex structure, making installation and maintenance inconvenient, which affects its service life and user experience.

[0005] Therefore, how to overcome the above-mentioned technical defects is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0006] The purpose of this invention is to provide a concealed hinge that can effectively limit the opening angle of the hinge and prevent bumps and knocks.

[0007] To solve the above-mentioned technical problems, this utility model provides a concealed hinge, comprising:

[0008] The frame hinge assembly includes a frame hinge base for detachably connecting a frame and a rotating arm connected to the frame hinge base, wherein the rotating arm is provided with a pivot seat at one end away from the frame hinge base;

[0009] The fan hinge assembly includes a fan hinge base for detachably connecting the fan body, a pivot, and a hinge limiting rod for limiting the rotation angle of the pivot arm. The pivot has a central portion that passes through the pivot base and two ends that are rotatably connected to the fan hinge base.

[0010] Optionally, in the above-mentioned concealed hinge, the frame hinge base is provided with a base mounting hole for detachable connection with the frame and a first fixing screw mounting hole for mounting fixing screws. The fixing screws are connected to the first fixing screw mounting hole through the second fixing screw mounting hole of the rotating arm.

[0011] Optionally, in the above-mentioned concealed hinge, the second fixing screw mounting hole is a slot.

[0012] Optionally, in the above-mentioned concealed hinge, the fixing screw, the first fixing screw mounting hole, and the second fixing screw mounting hole are multiple in a one-to-one correspondence.

[0013] Optionally, in the above-mentioned concealed hinge, the frame hinge assembly further includes a frame hinge decorative cover covering the frame hinge base, and the frame hinge decorative cover has a first rotating arm clearance opening for avoiding the rotating arm;

[0014] And / or, the hinge assembly further includes a hinge decorative cover disposed on the hinge base, the hinge decorative cover having a second swing arm clearance opening for avoiding the swing arm.

[0015] Optionally, in the above-mentioned concealed hinge, the fan hinge base is U-shaped, the fan hinge base has a central concave portion and two flanges that connect the two ends of the opening of the central concave portion. The two ends of the central concave portion are respectively provided with shaft mounting holes for mounting the shaft, and both flanges are provided with first mounting holes for adjusting screws for connecting the fan body through adjusting screws.

[0016] Optionally, in the above-mentioned concealed hinge, the fan hinge assembly further includes a fan hinge fixing plate disposed between the fan body and the flange. The fan hinge fixing plate is provided with a fixing plate mounting hole for connecting the fan body and a second mounting hole for adjusting screws that mates with the first mounting hole for adjusting screws.

[0017] Optionally, in the above-mentioned concealed hinge, the fan hinge fixing plate is further provided with a convex shaft, and both the fan hinge base and the hinge limiting rod are provided with convex shaft mounting holes that mate with the convex shaft.

[0018] Optionally, in the above-mentioned concealed hinge, there are multiple convex shafts, and the mounting holes of the convex shafts on the hinge base correspond one-to-one with the number and position of the convex shafts.

[0019] Optionally, in the above-mentioned concealed hinge, metal washers are provided between the two ends of the pivot and the base of the hinge.

[0020] This utility model provides a concealed hinge, the advantages of which are:

[0021] In practical use, the hinges are fixed to the frame and fan body respectively by installing the frame hinge base and fan hinge base. When the fan body rotates, the rotating arm rotates around the pivot. Because the hinge limiting rod restricts the rotation angle of the rotating arm, that is, restricts the opening angle of the hinge, it ensures that the fan body rotates within a safe range and effectively prevents collisions. This design not only improves the safety of using concealed hinges, but also extends their service life. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0023] Figure 1 An exploded view of the structure of a concealed hinge provided in an embodiment of this utility model;

[0024] Figure 2 A schematic diagram of the installation of the concealed hinge on the fan body and frame according to an embodiment of the present utility model (without the frame hinge decorative cover and the fan hinge decorative cover installed).

[0025] Figure 3 A schematic diagram of the installation of the concealed hinge on the fan body and frame according to an embodiment of the present utility model (installation frame hinge decorative cover and fan hinge decorative cover);

[0026] Figure 4 A cross-sectional schematic diagram of the concealed hinge installed on the fan body and frame according to an embodiment of the present utility model;

[0027] Figure 5 A schematic diagram of the structure of the hinge fixing plate provided in this embodiment of the utility model;

[0028] Figure 6 This is a schematic diagram of the structure of the hinge base provided in an embodiment of the present utility model;

[0029] Figure 7 A schematic diagram of the structure of the rotating arm provided in an embodiment of this utility model;

[0030] Figure 8 A schematic diagram of the hinge limiting rod provided in an embodiment of this utility model.

[0031] In the image above:

[0032] A-Frame; B-Sector;

[0033] 110-Frame hinge base; 120-Swivel arm; 121-Swivel bearing seat; 122-Strip groove; 130-Fixing screw; 140-Frame hinge decorative cover;

[0034] 210-Hinge fixing plate; 211-Panking shaft; 212-Fixing plate mounting hole; 220-Adjusting screw; 230-Hinge base; 231-Spindle mounting hole; 232-Adjusting screw first mounting hole; 233-Panking shaft mounting hole; 240-Spindle; 250-Hinge limit rod; 260-Hinge decorative cover; 270-Metal washer. Detailed Implementation

[0035] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0036] The core of this invention is to provide a concealed hinge that can effectively limit the opening angle of the hinge and prevent bumps and knocks.

[0037] To enable those skilled in the art to better understand the technical solutions provided by this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0038] For details, please refer to Figures 1-8 This utility model provides a concealed hinge, comprising a frame hinge assembly and a fan hinge assembly. By installing the frame hinge assembly onto a frame A and the fan hinge assembly onto a fan body B, the fan body B can rotate relative to the frame A.

[0039] The frame hinge assembly includes a frame hinge base 110 for connecting to frame A and a rotating arm 120 connected to the frame hinge base 110. A pivot seat 121 is provided at the end of the rotating arm 120 away from the frame hinge base 110. The frame hinge base 110 is fixed to frame A by screws or other fasteners, and the rotating arm 120 is connected to the fan hinge assembly via the pivot seat 121.

[0040] The fan hinge assembly includes a fan hinge base 230, a pivot 240, and a hinge limiting rod 250. The fan hinge base 230 is used to connect the fan body B. The pivot 240 passes through a pivot seat 121 in the middle, and its two ends are rotatably connected to the fan hinge base 230. The hinge limiting rod 250 is provided on the fan hinge base 230 or other components of the fan hinge assembly to limit the rotation angle of the pivot arm 120, ensuring that the fan body B does not interfere with the frame A during rotation.

[0041] The hinge limit rod 250 is located on the side near the pivot 240 so that it can abut against the pivot arm 120 after the hinge is rotated to a certain angle. This setting position is a theoretical position obtained by data calculation for actual application scenarios.

[0042] This solution provides a concealed hinge. In practical use, the hinge is fixed to the frame A and the fan body B respectively by installing the frame hinge base 110 and the fan hinge base 230. When the fan body B rotates, the rotating arm 120 rotates around the pivot 240. Since the hinge limiting rod 250 restricts the rotation angle of the rotating arm 120, that is, restricts the opening angle of the hinge, it can ensure that the fan body B rotates within a safe range and effectively prevents collisions. This design not only improves the safety of the concealed hinge but also extends its service life.

[0043] The hinge structure provided by this invention is simple and easy to install, and can effectively solve the problems existing in existing hinges. It has significant practical value and broad application prospects.

[0044] To enable the adjustable function of the concealed hinge, the hinge base 110 has a base mounting hole for detachable connection with the frame A and a first fixing screw mounting hole for mounting the fixing screw 130. The fixing screw 130 connects to the first fixing screw mounting hole via a second fixing screw mounting hole on the rotating arm 120. Specifically, the second fixing screw mounting hole can be designed as a slot. The vertical and horizontal positions of the frame and the fan body can be adjusted using the fixing screw 130.

[0045] like Figure 1 As shown, the swing arm 120 has a slot 122, which provides greater adjustment flexibility. The slot allows the swing arm 120 to move within a certain range, making it easier to align with the frame A and adjust its position during assembly. When adjusted to the appropriate position, the swing arm 120 can be fixed in the desired position by tightening the fixing screws 130.

[0046] To ensure connection stability, multiple fixing screws 130, first fixing screw mounting holes, and second fixing screw mounting holes are provided in a one-to-one correspondence. The multiple fixing screws 130 are symmetrically positioned on the rotating arm 120 and the frame hinge base 110.

[0047] In a specific embodiment, to prevent the hinges from being exposed for extended periods and affecting aesthetics, decorative covers are additionally provided for both the frame hinge assembly and the fan hinge assembly. The frame hinge assembly also includes a frame hinge decorative cover 140 that covers the frame hinge base 110. Simultaneously, to avoid interfering with the movement of the rotating arm 120, a first rotating arm clearance opening is provided on the frame hinge decorative cover 140 to allow the rotating arm 120 to rotate normally without obstruction by the decorative cover. Similarly, the fan hinge assembly also includes a fan hinge decorative cover 260 that covers the fan hinge base 230, and a second rotating arm clearance opening is provided on the fan hinge decorative cover 260 to allow the rotating arm 120 to rotate.

[0048] The decorative cover 140 for frame hinges and the decorative cover 260 for fan hinges not only enhance the appearance and provide aesthetic appeal, but also prevent the hinges from being damaged by external impacts or dust accumulation, thus extending their service life.

[0049] The hinge decorative cover 140 also has a positioning groove at the position corresponding to the fixing screw 130. The inner diameter of the positioning groove is slightly larger than the outer diameter of the fixing screw 130, providing space for adjusting the position of the fixing screw 130. This feature facilitates installation and positioning using the fixing screw 130 and also prevents the hinge decorative cover 140 from falling off.

[0050] In a specific embodiment, the fan hinge base 230 is U-shaped. The fan hinge base 230 has a central concave portion and two flanges connecting the two ends of the opening in the central concave portion. The two ends of the central concave portion are respectively provided with shaft mounting holes 231 for mounting the rotating shaft 240. Both flanges are provided with first mounting holes 232 for adjusting screws for connecting the fan body B via adjusting screws 220. The U-shaped structure of the fan hinge base 230 provides a mounting position for the rotating shaft 240. Furthermore, the rotating arm 120 and the rotating shaft seat 121 can extend into the central concave portion of the fan hinge base 230 during the rotation of the concealed hinge.

[0051] Furthermore, the hinge assembly also includes a hinge fixing plate 210 disposed between the fan body B and the flange. The hinge fixing plate 210 has fixing plate mounting holes 212 for connecting the fan body B and adjusting screw mounting holes 232 that mate with the first adjusting screw mounting holes 232. The hinge fixing plate 210 overlaps with the flange portion in the projection direction, and the non-overlapping portion is provided with the fixing plate mounting holes 212.

[0052] like Figure 1 As shown, the two flanges of the fan hinge base 230 correspond to a fan hinge fixing plate 210. During installation, the fan hinge fixing plate 210 can be fixed to the fan body B first, and then the position of the fan hinge base 230 can be adjusted.

[0053] By combining the above embodiment of designing the mounting holes of the fixing screws on the rotating arm 120 as strip grooves, the concealed hinge in this application can be designed as a simple, three-dimensional (front and back, left and right, and height of the fan body) adjustable hidden hinge.

[0054] The new hinge structure used in this solution adopts a single-axis rotation, has fewer parts, a higher load-bearing capacity, and is not easily damaged. It also supports three-dimensional adjustment to meet the needs of adjusting the hinge during door installation and deformation.

[0055] Of course, the aforementioned slotted structure can be omitted, and instead, some of the screws on the hinge can be designed as eccentric screws. The eccentric screw design allows the position between frame A and fan body B to be changed by rotating the eccentric screw without altering its length.

[0056] This design allows the eccentric screw to move eccentrically within the hinge, adjusting the relative position of certain parts of the hinge with respect to the frame or hinge body. While rotating the eccentric screw, it's necessary to continuously observe the opening and closing of the frame or hinge body, moving it as needed until the appropriate gap is achieved. This process may require multiple trials and fine-tuning to ensure perfect alignment of the frame and hinge body for optimal results.

[0057] The hinge fixing plate 210 is also provided with a convex shaft 211, and the hinge base 230 and the hinge limiting rod 250 are respectively provided with convex shaft mounting holes that mate with the convex shaft 211.

[0058] Of course, there can be multiple convex shafts 211, and the number and position of the convex shaft mounting holes 233 of the hinge base 230 correspond one-to-one with the number and position of the convex shafts 211.

[0059] In a specific embodiment, metal washers 270 are provided between both ends of the rotating shaft 240 and the hinge base 230. On one hand, the metal washers increase the contact area between the rotating shaft 240 and the hinge base 230, making the connection more stable and reducing wear or loosening caused by localized stress concentration. On the other hand, during mechanical movement, the rotating shaft 240 and the hinge base 230 may loosen due to vibration or impact. The metal washers 270 increase friction, preventing the nuts or bolts from loosening. Furthermore, the metal washers 270 also protect the contact surfaces between the rotating shaft 240 and the hinge base 230, reducing wear caused by direct contact.

[0060] To improve the stability of the hinge structure, the frame hinge base 110, rotating arm 120, rotating shaft seat 121, frame hinge decorative cover 140, fan hinge fixing plate 210, fan hinge base 230, rotating shaft 240, hinge limiting rod 250, and fan hinge decorative cover 260 can all be symmetrical structures.

[0061] The beneficial effects of the technical solution provided by this utility model include:

[0062] 1. Precise control of rotation angle: By setting the hinge limit rod 250, the rotation angle of the swivel arm 120 can be effectively limited, avoiding interference or collision between the fan body B and the frame A during rotation, thus improving the stability and safety of the hinge.

[0063] 2. Simple structure and easy installation: The design of the frame hinge and the fan hinge is simple and clear. The connection between each component is simple and reliable, which facilitates installation and maintenance and reduces installation costs and time.

[0064] 3. Improved service life: The hinge limit rod 250 reduces mechanical wear caused by excessive rotation, thus extending the service life of the hinge.

[0065] 4. Wide applicability: The concealed hinge in this application is suitable for various types of doors, windows, furniture and other scenarios that require the connection between frame A and sash B, and has wide applicability.

[0066] In the description of this application, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0067] In the description of the embodiments of this application, unless otherwise stated, " / " means "or", for example, A / B can mean A or B; "and / or" in this document is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Furthermore, in the description of the embodiments of this application, "multiple" refers to two or more.

[0068] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0069] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principles of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A concealed hinge, characterized in that, The application relates to a frame-hinge assembly and a fan-hinge assembly. The frame-hinge assembly comprises a frame-hinge base (110) for detachably connecting a frame (A) and a rotating arm (120) connected with the frame-hinge base (110), wherein a rotating shaft base (121) is arranged at one end of the rotating arm (120) away from the frame-hinge base (110). The fan-hinge assembly comprises a fan-hinge base (230) for detachably connecting a fan body (B), a rotating shaft (240) and a hinge limiting rod (250) for limiting the rotating angle of the rotating arm (120), wherein the rotating shaft (240) penetrates through the rotating shaft base (121) and is rotatably connected with the fan-hinge base (230) at two ends.

2. Concealed hinge according to claim 1, characterized in that A base mounting hole for detachably connecting the frame (A) and a first fixing screw mounting hole for mounting a fixing screw (130) are arranged on the frame-hinge base (110), and the fixing screw (130) is connected with the first fixing screw mounting hole through a second fixing screw mounting hole of the rotating arm (120).

3. Concealed hinge according to claim 2, characterized in that The second fixing screw mounting hole is a strip-shaped groove.

4. The concealed hinge according to claim 2, characterized in that The fixing screw (130), the first fixing screw mounting hole and the second fixing screw mounting hole are one-to-one corresponding.

5. The concealed hinge according to claim 1, characterized in that The frame-hinge assembly further comprises a frame-hinge decorative cover (140) covering the frame-hinge base (110), and a first rotating arm avoiding hole for avoiding the rotating arm (120) is arranged on the frame-hinge decorative cover (140). The fan-hinge assembly further comprises a fan-hinge decorative cover (260) covering the fan-hinge base (230), and a second rotating arm avoiding hole for avoiding the rotating arm (120) is arranged on the fan-hinge decorative cover (260).

6. The concealed hinge according to claim 1, characterized in that The fan-hinge base (230) is in a whole "U" shape, has a middle inner recess and two turnups respectively connected with two opening ends of the middle inner recess, and rotating shaft mounting holes (231) for mounting the rotating shaft (240) are arranged at two ends of the middle inner recess.

7. A concealed hinge according to claim 6, characterized in that The fan-hinge assembly further comprises a fan-hinge fixing plate (210) arranged between the fan body (B) and the turnup, and a fixing plate mounting hole (212) for connecting the fan body (B) and an adjusting screw second mounting hole butting with the adjusting screw first mounting hole (232) are arranged on the fan-hinge fixing plate (210).

8. Concealed hinge according to claim 7, characterized in that A convex shaft (211) is further arranged on the fan-hinge fixing plate (210), and the fan-hinge base (230) and the hinge limiting rod (250) are provided with convex shaft mounting holes butting with the convex shaft (211).

9. A concealed hinge according to claim 8, characterized in that The number of the convex shafts (211) is plural, and the convex shaft mounting holes (233) of the fan-hinge base (230) are one-to-one corresponding with the number and positions of the convex shafts (211).

10. The concealed hinge according to claim 1, characterized in that Metal gaskets (270) are arranged between the two ends of the rotating shaft (240) and the fan-hinge base (230).

Images