A slotless primary-secondary hinge

Abstract

The utility model discloses a kind of slot-free primary-secondary hinge, including two main shafts and intermediate shaft, the left side of two main shafts is commonly fixedly connected with female page, the front side of intermediate shaft is fixedly connected with daughter page, the adjacent side of two main shafts is equipped with circular slot, the upper and lower ends of intermediate shaft are fixedly connected with shaft, the circular slot located in upper is equipped with square channel, square sleeve is slidably connected in square channel, threaded rod is threadedly connected on square sleeve, the upper end of main shaft located in upper is fixedly connected with protective cover. The utility model is by optimizing the structure design of hinge, realize the visual calibration of female page perpendicularity, the accurate limit of daughter page installation angle, improve the opening and closing stability and use durability of hinge simultaneously, satisfy the higher demand of user to slot-free hinge installation convenience and use reliability.

Description

Technical Field

[0001] This utility model relates to the field of hinge technology, and in particular to a slotless hinge. Background Technology

[0002] Slotless hinges eliminate the need for recessed slots in door panels and frames, allowing for installation simply by surface bonding. They offer advantages such as easy construction, no damage to the base material structure, and compatibility with various door panel materials (e.g., wood, aluminum alloy, PVC). As a result, they are widely used in door and window installations in home decoration, office spaces, and commercial spaces.

[0003] However, existing slotless hinges still have many pain points that need to be addressed in actual use and installation: First, the installation positioning accuracy is insufficient. Traditional slotless hinges require an additional level to calibrate the verticality of the mother hinge during installation. This is cumbersome and prone to tilting due to human observation errors, resulting in uneven door closure gaps and jamming during opening and closing. At the same time, the 90° vertical positioning of the child hinge and the mother hinge requires manual support of the door, which not only increases the difficulty of construction but also makes it easy for the installation to shift due to unstable support, affecting the performance of the door and window. Secondly, the mounting holes in existing hinges are mostly conventional round holes, which can cause the screw heads to protrude, affecting the fit between the hinge and the substrate and potentially scratching surrounding objects.

[0004] Therefore, a slotless hinge is needed to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a slotless hinge. This invention optimizes the hinge's structural design, enabling visual calibration of the mother hinge's verticality and precise limiting of the child hinge's installation angle. It also improves the hinge's opening and closing stability and durability, meeting users' higher demands for the ease of installation and reliability of slotless hinges.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A slotless hinge includes two main shafts and an intermediate shaft. A mother page is fixedly connected to the left side of both main shafts, and a daughter page is fixedly connected to the front side of the intermediate shaft. Circular grooves are provided on adjacent sides of both main shafts. Rotary shafts are fixedly connected to the upper and lower ends of the intermediate shaft. A square channel is provided in the upper circular groove, and a square sleeve is slidably connected within the square channel. A threaded rod is threaded onto the square sleeve. A protective cover is fixedly connected to the upper end of the upper main shaft, and the threaded rod is rotatably connected to the inner top of the protective cover. A square groove is provided at the upper end of the upper rotating shaft.

[0007] Preferably, both sides of the rotating shaft extend into the corresponding circular groove and are rotatably connected to its inner wall via ball bearings.

[0008] Preferably, a short rod is rotatably connected through the right side of the protective cover, and a knob is fixedly connected to the right side of the short rod. Both the short rod and the threaded rod are provided with meshing bevel gears.

[0009] Preferably, both the mother page and the child page are provided with multiple mounting holes, and the cross-section of each of the multiple mounting holes is T-shaped.

[0010] Preferably, damping washers are provided between adjacent sides of the two main shafts and the intermediate shaft.

[0011] Preferably, two levels are symmetrically embedded on the mother page, and both levels are installed horizontally.

[0012] Preferably, the outer wall of the square sleeve is fitted to the inner wall of the square channel, and the lower end of the square sleeve is adapted to be inserted into the square groove.

[0013] Preferably, the observation surface of the level is flush with the mounting surface of the mother page, and the outside of the level is covered with a transparent wear-resistant protective film.

[0014] Compared with existing technologies, the advantages of this device are: 1. Compared with existing technologies, by embedding two horizontal levels in the mother page, the verticality of the mother page installation can be judged in real time without the need to carry additional auxiliary tools such as a level. This simplifies the operation process, avoids errors from manual observation, ensures accurate installation of the mother page, and reduces problems such as uneven door closure gaps and jamming during opening and closing. 2. Compared with existing technologies, by using the square channel, square sleeve, threaded rod and square groove, the square sleeve can be inserted into the square groove by turning the knob during installation, and the child page and the mother page can be precisely locked in a 90° vertical state or a 180° horizontal state. There is no need for continuous manual support of the door leaf, which reduces the difficulty of construction, avoids installation deviation, and improves installation efficiency and accuracy. 3. Compared with existing technologies, the mounting holes of the mother and daughter hinges adopt a T-shaped cross-section design, which allows the screw head to be embedded in the mounting hole and avoids protruding from the hinge surface. This ensures a tight fit between the hinge and the substrate and prevents the screw head from scratching surrounding objects, thus improving safety and aesthetics. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a slotless hinge proposed in this utility model; Figure 2 for Figure 1 A structural diagram from another perspective; Figure 3 for Figure 2sectional view Figure 4 for Figure 3 Enlarged structural diagram at point A in the middle.

[0016] In the diagram: 1 main shaft, 2 intermediate shaft, 3 damping washer, 4 mother leaf, 5 daughter leaf, 6 mounting hole, 7 level, 8 protective cover, 9 knob, 10 circular groove, 11 rotating shaft, 12 square groove, 13 square channel, 14 square sleeve, 15 bevel gear, 16 threaded rod. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0018] Reference Figures 1-4 A slotless hinge includes two main shafts 1 and an intermediate shaft 2. Damping washers 3, made of nitrile rubber, are provided between adjacent sides of the two main shafts 1 and the intermediate shaft 2. The inner diameter of the damping washers 3 is adapted to the contact surface dimensions of the main shafts 1 and the intermediate shaft 2. They are interference-fitted onto the ends of the main shafts 1 near the intermediate shaft 2, generating stable damping force during door opening and closing, effectively slowing down the opening and closing speed, preventing rigid impact between the door and the door frame, and reducing friction and wear between the main shafts 1 and the intermediate shaft 2, thus extending the overall service life of the hinge. A mother hinge 4 is fixedly connected to the left side of both main shafts 1, and a child hinge 5 is fixedly connected to the front side of the intermediate shaft 2. The size of the child hinge 5 matches that of the mother hinge 4, allowing it to fully engage with the mother hinge 4 when closed. To minimize gaps, the two main shafts 1 have circular grooves 10 on adjacent sides. The upper and lower ends of the intermediate shaft 2 are fixedly connected to rotating shafts 11. Both sides of the rotating shafts 11 extend into the corresponding circular grooves 10 and are rotatably connected to their inner walls via ball bearings. The upper circular groove 10 has a square channel 13. A square sleeve 14 is slidably connected in the square channel 13. A threaded rod 16 is threaded onto the square sleeve 14. A protective cover 8 is fixedly connected to the upper end of the upper main shaft 1. The threaded rod 16 is rotatably connected to the inner top of the protective cover 8. The upper end of the upper rotating shaft 11 has a square groove 12. The outer wall of the square sleeve 14 fits snugly against the inner wall of the square channel 13, and the lower end of the square sleeve 14 is adapted to be inserted into the square groove 12.

[0019] The protective cover 8 has a short rod that is rotatably connected through it on the right side, and a knob 9 is fixedly connected to the right side of the short rod. Both the short rod and the threaded rod 16 are provided with bevel gears 15 that mesh with each other.

[0020] Both the mother page 4 and the child page 5 are provided with multiple mounting holes 6. The cross-section of the multiple mounting holes 6 is T-shaped. The upper part of the T-shaped mounting hole 6 is an expanded diameter section, the diameter of which is adapted to the head diameter of commonly used self-tapping screws. The lower part is a reduced diameter section, the diameter of which matches the screw rod diameter, so that the screw head can be completely embedded in the expanded diameter section after installation and does not protrude from the surface of the mother page 4 and the child page 5.

[0021] Two levels 7 are symmetrically embedded on the mother page 4. Both levels 7 are installed horizontally and are located on the upper and lower sides of the mother page 4, respectively, parallel to the long side of the mother page 4. The observation surface of the level 7 is flush with the mounting surface of the mother page 4, and the outside of the level 7 is covered with a transparent wear-resistant protective film to protect the surface of the level 7.

[0022] The functional principle of this utility model can be explained through the following operation: Before operation, the door frame mounting surface must be cleaned to ensure that there is no dust, protrusions, or other impurities that may affect the fit. Then, the mother page 4 is attached to the preset installation position on the door frame. At this time, the bubble status is directly observed through the two horizontally embedded levels 7 on the mother page 4: if the bubble is at the center scale line of the level 7, it means that the mother page 4 has met the vertical installation standard; if the bubble is offset, simply adjust the position of the mother page 4 until the bubble is centered to complete the verticality calibration. After the calibration is correct, screws are passed through the T-shaped mounting holes 6 of the mother page 4 and screwed into the door frame. The screw head will be fully embedded in the enlarged section of the T-shaped mounting hole 6, keeping it flush with the surface of the mother page 4.

[0023] After the mother page 4 is fixed, first align the child page 5 with the preset position of the door leaf and initially attach it. Rotate the door leaf according to the actual installation requirements. The door leaf will drive the child page 5 and the intermediate shaft 2 to rotate synchronously around the rotating shaft 11. When it is necessary to fix the door leaf in a 90° position perpendicular to the door frame or a 180° position flush with the door frame, the limit mechanism is triggered by rotating the knob 9 on the right side of the protective cover 8: the knob 9 drives the short rod connected to it to rotate. The bevel gear 15 on the short rod meshes with the bevel gear 15 on the threaded rod 16, thereby driving the threaded rod 16 to rotate. Since the square sleeve 14 and the square channel 13 are sliding fit structures, the square sleeve 14 cannot rotate with the threaded rod 16. Therefore, the rotational movement of the threaded rod 16 is converted into the vertical lifting and lowering movement of the square sleeve 14 until the lower end of the square sleeve 14 is precisely inserted into the square groove 12 at the upper end of the rotating shaft 11 of the child page 5. The angle of the child page 5 is then mechanically locked. At this time, the door leaf can be kept stable without continuous manual support.

[0024] After the angle is locked, the sub-page 5 can be fixed. Screw the screw through the T-shaped mounting hole 6 of the sub-page 5 and tighten it into the door leaf, ensuring the screw head is flush with the surface of the sub-page 5 and that the sub-page 5 fits tightly against the door leaf. Once all is fixed, rotate the knob 9 in the opposite direction. This drives the threaded rod 16 to rotate in the opposite direction via the bevel gear 15. The square sleeve 14 then rises from the square groove 12 and retracts into the square channel 13, releasing the angle lock. At this point, the door leaf can open and close normally around the pivot 11.

[0025] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A slotless hinge, characterized in that, include: Two main shafts (1) and an intermediate shaft (2). A mother page (4) is fixedly connected to the left side of the two main shafts (1). A daughter page (5) is fixedly connected to the front side of the intermediate shaft (2). Circular grooves (10) are provided on the adjacent sides of the two main shafts (1). Rotary shafts (11) are fixedly connected to the upper and lower ends of the intermediate shaft (2). The circular groove (10) located above is provided with a square channel (13), and a square sleeve (14) is slidably connected in the square channel (13). A threaded rod (16) is threadedly connected to the square sleeve (14). A protective cover (8) is fixedly connected to the upper end of the main shaft (1) located above. The threaded rod (16) is rotatably connected to the inner top of the protective cover (8). A square groove (12) is provided at the upper end of the rotating shaft (11) located above.

2. The slotless hinge according to claim 1, characterized in that: Both sides of the rotating shaft (11) extend into the corresponding circular groove (10) and are rotatably connected to its inner wall by ball bearings.

3. The slotless hinge according to claim 1, characterized in that: A short rod is rotatably connected through the right side of the protective cover (8), and a knob (9) is fixedly connected to the right side of the short rod. Both the short rod and the threaded rod (16) are provided with bevel gears (15) that mesh with each other.

4. The slotless hinge according to claim 1, characterized in that: Both the mother page (4) and the child page (5) are provided with multiple mounting holes (6), and the cross-section of each of the multiple mounting holes (6) is T-shaped.

5. A slotless hinge according to claim 1, characterized in that: Damping washers (3) are provided between the adjacent sides of the two main shafts (1) and the intermediate shaft (2).

6. A slotless hinge according to claim 1, characterized in that: Two levels (7) are symmetrically embedded on the mother page (4), and both levels (7) are installed horizontally.

7. A slotless hinge according to claim 1, characterized in that: The outer wall of the square sleeve (14) is fitted to the inner wall of the square channel (13), and the lower end of the square sleeve (14) is adapted to be inserted into the square groove (12).

8. A slotless hinge according to claim 6, characterized in that: The observation surface of the level (7) is flush with the mounting surface of the mother page (4), and the outside of the level (7) is covered with a transparent wear-resistant protective film.

Images