Mute durable damping hinge for sofa armrest box

Abstract

The utility model relates to the technical field of damping hinges, and discloses a mute durable damping hinge for a sofa armrest box, which comprises a rotating shaft body, a first shaft sleeve and a plugging component, the first shaft sleeve is arranged outside the rotating shaft body, a first hinge piece is fixedly connected onto the first shaft sleeve, a second shaft sleeve is arranged outside the rotating shaft body, and the plugging component is fixedly connected onto the second shaft sleeve. The second shaft sleeve is fixedly connected with a second hinge piece, the rotating shaft body is provided with a plugging assembly facilitating plugging of the first shaft sleeve and the second shaft sleeve, and the interior of the first shaft sleeve is fixedly connected with a metal sleeve. Through damping of a metal sleeve and a solid lubricating coating, a buffering effect is achieved during rotation, violent collision caused by rapid closing is avoided, an outer side roller of the bearing is fixed to the first shaft sleeve or the second shaft sleeve, and an inner side roller of the bearing is fixed to the rotating shaft body through a semicircular clamping block; and the first hinge piece and the second hinge piece can be conveniently rotated, the contact face is prevented from being abraded after being used for a long time, and the practicability of the hinge is improved.

Description

Technical Field

[0001] This utility model relates to the field of damping hinge technology, and in particular to a silent and durable damping hinge for sofa armrest boxes. Background Technology

[0002] Sofa armrest boxes are multifunctional furniture accessories, typically installed on the armrests of sofas, serving both storage and decorative purposes. Through clever design, they transform previously unused armrest space into a practical area, meeting the modern home's demand for efficient space utilization. The silent, durable, damping hinges used in sofa armrest boxes consist of two hinged pieces that connect two objects, allowing them to rotate relative to each other. The hinge pieces are usually connected by bushings fitted onto a pivot. To reduce friction between the bushing and the pivot, a rubbery lubricant is typically added to the gap between them, providing both lubrication and damping.

[0003] In existing technologies, due to prolonged use, the originally tightly fitting contact surfaces between the bushing and the shaft gradually wear down, and the gap between them tends to widen. This change creates a channel for the lubricating oil that was originally filling the gap to leak out. Furthermore, due to the special position and structural characteristics of the bushing and the shaft, adding lubricating oil requires disassembling part of the structure, which gradually reduces the lubrication effect. This leads to abnormal friction between the bushing and the shaft, resulting in a harsh noise that affects the user experience. In addition, the leaked lubricating oil not only stains the area around the hinge, affecting its appearance, but may also drip onto other items, causing pollution and damage, and bringing many inconveniences. Therefore, there is a need to improve the design of a silent and durable damping hinge for sofa armrest boxes to solve the above problems. Utility Model Content

[0004] To overcome the problem that with prolonged use, the originally tightly fitting contact surfaces between the bushing and the shaft will gradually wear down, causing lubricating oil to leak out from the gaps, resulting in a gradual loss of lubrication and affecting the user experience.

[0005] The technical solution of this utility model is as follows: a silent and durable damping hinge for a sofa armrest box, including a pivot body, a first bushing and a sealing component. The first bushing is provided on the outside of the pivot body, and a first hinge piece is fixedly connected to the first bushing. A second bushing is provided on the outside of the pivot body, and a second hinge piece is fixedly connected to the second bushing. A sealing component is provided on the pivot body to facilitate sealing the first bushing and the second bushing. A metal sleeve is fixedly connected inside the first bushing, and the metal sleeve is fixedly connected inside the second bushing. The inner side of the metal sleeve is coated with a solid lubricating coating. A bearing is fixedly connected inside the first bushing, and the bearing is fixedly connected inside the second bushing. A semi-circular locking block is slidably connected inside the pivot body, and the semi-circular locking block is engaged inside the bearing. A spring is fixedly connected between the semi-circular locking block and the pivot body.

[0006] Preferably, four sets of semicircular blocks and springs are provided, and the four sets of semicircular blocks and springs are distributed sequentially from top to bottom on the rotating shaft body. Each set of semicircular blocks and springs has four pieces, and the four semicircular blocks and springs are symmetrically distributed on the rotating shaft body.

[0007] Preferably, the bearing has a matching groove at the corresponding position of the semi-circular locking block, and the semi-circular locking block is engaged in the groove of the bearing.

[0008] Preferably, the rotating shaft body has a matching groove at the corresponding position of the semi-circular locking block, and the semi-circular locking block is slidably connected in the groove of the rotating shaft body.

[0009] Preferably, there are two first bushings and three second bushings, with the first and second bushings being staggered.

[0010] Preferably, the sealing component includes a first stop block, which is fixedly connected to the bottom of the rotating shaft body. The rotating shaft body has an internal thread inside, and a second stop block is provided on the top of the rotating shaft body. An anti-slip sleeve for improving friction is fixedly connected to the outside of the second stop block. The second stop block has an external thread, and the internal thread is threaded to the outside of the external thread.

[0011] Preferably, the rotating shaft body has a matching groove at the corresponding position of the second stop, and the bottom of the second stop is set in the groove of the rotating shaft body.

[0012] The beneficial effects of this utility model are:

[0013] 1. As the bushing and shaft rotate over a long period of time, the originally tightly fitting contact surfaces will gradually wear down. The damping effect of the metal sleeve and solid lubricating coating provides a buffer during rotation, preventing violent collisions caused by rapid closing. Furthermore, the outer roller of the bearing is fixed to the first or second bushing, and the inner roller of the bearing is fixed to the shaft body by a semi-circular locking block, making it easy to rotate the first and second hinge pieces. This prevents wear on the contact surfaces from prolonged use, improving practicality and avoiding the problem of lubricating oil leaking from the gaps, causing the lubrication effect to gradually fail and affecting the user experience.

[0014] 2. The first and second bushings on the outside of the rotating shaft body are sealed by the first and second stops to prevent the first and second bushings from falling off the rotating shaft body. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the rotating shaft body structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the solid lubricating coating structure of this utility model;

[0018] Figure 4 This is a schematic diagram of the semi-circular card block structure of this utility model;

[0019] Figure 5 This is a schematic diagram of the sealing component structure of this utility model.

[0020] Explanation of reference numerals in the attached drawings: 1. Shaft body; 21. First hinge piece; 22. First bushing; 23. Second hinge piece; 24. Second bushing; 25. Metal sleeve; 26. Solid lubricating coating; 27. Bearing; 28. Semi-circular retaining block; 29. ​​Spring; 31. First stop block; 32. Internal thread; 33. Second stop block; 34. External thread; 35. Anti-slip sleeve. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Please see Figure 1 - Figure 5This utility model provides an embodiment: a silent and durable damping hinge for a sofa armrest box, including a pivot body 1, a first bushing 22, and a sealing assembly. The first bushing 22 is disposed on the outside of the pivot body 1, and a first hinge piece 21 is fixedly connected to the first bushing 22. A second bushing 24 is disposed on the outside of the pivot body 1, and a second hinge piece 23 is fixedly connected to the second bushing 24. A sealing assembly for convenient sealing of the first bushing 22 and the second bushing 24 is provided on the pivot body 1. A metal sleeve 25 is fixedly connected inside the first bushing 22, and the metal sleeve 25 is fixedly connected inside the second bushing 24. The inner side of the metal sleeve 25 is coated with a solid lubricating coating 26, which is polytetrafluoroethylene. A bearing 27 is fixedly connected inside the first bushing 22, and the bearing 27 is fixedly connected to the second bushing 24. Inside, a semi-circular locking block 28 is slidably connected to the inside of the rotating shaft body 1. The semi-circular locking block 28 is engaged inside the bearing 27. A spring 29 is fixedly connected between the semi-circular locking block 28 and the rotating shaft body 1. Through the damping of the metal sleeve 25 and the solid lubricating coating 26, it has a buffering effect when rotating, avoiding violent collisions caused by rapid closing. It is also fixed to the first bushing 22 or the second bushing 24 by the outer roller of the bearing 27. The inner roller of the bearing 27 is fixed to the rotating shaft body 1 by the semi-circular locking block 28, making it easy to rotate the first hinge piece 21 and the second hinge piece 23, preventing wear on the contact surface after long-term use, and improving its practicality. The sealing assembly seals the first bushing 22 and the second bushing 24 outside the rotating shaft body 1 to prevent the first bushing 22 and the second bushing 24 from falling off the rotating shaft body 1.

[0023] Please see Figure 2 - Figure 4In this embodiment, four sets of semicircular locking blocks 28 and springs 29 are arranged, distributed sequentially from top to bottom on the rotating shaft body 1. Each set contains four semicircular locking blocks 28 and springs 29, symmetrically distributed on the rotating shaft body 1 to fix the inner roller of the bearing 27. This allows the first hinge piece 21 and the second hinge piece 23 to rotate through the rotating shaft body 1 via the bearing 27, improving the stability of rotating the first hinge piece 21 and the second hinge piece 23. The bearing 27 has corresponding grooves at the corresponding positions of the semicircular locking blocks 28. The 28 is engaged in the groove of the bearing 27 to fix the inner roller of the bearing 27, thereby improving the practicality of the device. The rotating shaft body 1 has a matching groove at the corresponding position of the semi-circular locking block 28. The semi-circular locking block 28 is slidably connected in the groove of the rotating shaft body 1 to limit the semi-circular locking block 28, thereby improving the sliding stability of the semi-circular locking block 28 and improving the practicality of the device. There are two first bushings 22 and three second bushings 24. The first bushings 22 and the second bushings 24 are staggered to facilitate the rotation of the first hinge piece 21 and the second hinge piece 23, thereby improving the practicality of the device.

[0024] Please see Figure 5 In this embodiment, the sealing assembly includes a first stop 31, which is fixedly connected to the bottom of the rotating shaft body 1. The rotating shaft body 1 has an internal thread 32 inside and a second stop 33 on the top. An anti-slip sleeve 35 for improving friction is fixedly connected to the outside of the second stop 33. The second stop 33 has an external thread 34, and the internal thread 32 is threaded to the outside of the external thread 34. The sealing assembly seals the first bushing 22 and the second bushing 24 outside the rotating shaft body 1 through the first stop 31 and the second stop 33, preventing the first bushing 22 and the second bushing 24 from falling off the rotating shaft body 1. The rotating shaft body 1 has a matching groove at the corresponding position of the second stop 33, and the bottom of the second stop 33 is set in the groove of the rotating shaft body 1, so that the second stop 33 can be easily fixed on the rotating shaft body 1, thereby improving its stability.

[0025] During operation, the first bushing 22 of the first hinge piece 21 and the second bushing 24 of the second hinge piece 23 are coaxially arranged. The shaft body 1 is passed through the first bushing 22 and the second bushing 24 one by one, allowing it to pass through the metal sleeve 25 and the bearing 27 inside the first bushing 22 and the second bushing 24. The semi-circular locking block 28 is moved inward by the arc surface of the semi-circular locking block 28. The first stop 31 contacts one end of the second bushing 24, and then the first bushing 22 and the second bushing 24 are finely adjusted to engage the semi-circular locking block 28 in the groove of the bearing 27, thus fixing the inner roller of the bearing 27 to the shaft body 1. Finally, the second stop 33 is aligned with the corresponding groove of the shaft body 1 and threaded through the internal thread 32. The external thread 34 facilitates the fixing of the second stop 33 to the shaft body 1. The first stop 31 and the second stop 33 can seal the first bushing 22 and the second bushing 24 on the outside of the shaft body 1. In use, the connecting holes on the first hinge piece 21 and the second hinge piece 23 are connected externally. The damping of the metal sleeve 25 and the solid lubricating coating 26 provides a buffering effect during rotation, preventing violent collisions caused by rapid closing. The outer roller of the bearing 27 is fixed to the first bushing 22 or the second bushing 24, and the inner roller of the bearing 27 is fixed to the shaft body 1 by the semi-circular locking block 28. This facilitates the rotation of the first hinge piece 21 and the second hinge piece 23, preventing wear on the contact surfaces after long-term use and improving its practicality.

[0026] Through the above steps, the metal sleeve 25 and the solid lubricating coating 26 provide damping during rotation, preventing violent collisions caused by rapid closing. The outer roller of the bearing 27 is fixed to the first bushing 22 or the second bushing 24, and the inner roller of the bearing 27 is fixed to the rotating shaft body 1 by the semi-circular locking block 28, making it easy to rotate the first hinge piece 21 and the second hinge piece 23. This prevents wear on the contact surfaces after prolonged use, thus solving the problem of lubricating oil leaking from the gaps, causing the lubrication effect to gradually fail and affecting the user experience.

Claims

1. A silent and durable damper hinge for a sofa arm box, comprising a pivot body (1), characterized in that: It also includes a first bushing (22) and a sealing assembly. The first bushing (22) is provided on the outside of the rotating shaft body (1). A first hinge piece (21) is fixedly connected to the first bushing (22). A second bushing (24) is provided on the outside of the rotating shaft body (1). A second hinge piece (23) is fixedly connected to the second bushing (24). A sealing assembly is provided on the rotating shaft body (1) to facilitate sealing the first bushing (22) and the second bushing (24). A metal sleeve (25) is fixedly connected inside the first bushing (22). A metal sleeve (25) is fixedly connected inside the second bushing (24). The inner side of the metal sleeve (25) is coated with a solid lubricating coating (26). A bearing (27) is fixedly connected inside the first bushing (22). The bearing (27) is fixedly connected inside the second bushing (24). A semi-circular locking block (28) is slidably connected inside the rotating shaft body (1). The semi-circular locking block (28) is locked inside the bearing (27). A spring (29) is fixedly connected between the semi-circular locking block (28) and the rotating shaft body (1).

2. A silent durable damper hinge for a sofa arm box according to claim 1, characterized in that: Four sets of semicircular locking blocks (28) and springs (29) are provided. The four sets of semicircular locking blocks (28) and springs (29) are distributed from top to bottom on the rotating shaft body (1). Each set of semicircular locking blocks (28) and springs (29) has four sets. The four semicircular locking blocks (28) and springs (29) are symmetrically distributed on the rotating shaft body (1).

3. A silent durable damper hinge for a sofa arm box according to claim 1, characterized in that: The bearing (27) has a matching groove at the corresponding position of the semi-circular locking block (28), and the semi-circular locking block (28) is engaged in the groove of the bearing (27).

4. A silent durable damper hinge for a sofa arm box according to claim 1, characterized in that: The rotating shaft body (1) has a matching groove at the corresponding position of the semicircular locking block (28), and the semicircular locking block (28) is slidably connected in the groove of the rotating shaft body (1).

5. A silent and durable damper hinge for a sofa arm box according to claim 1, characterized in that: There are two first bushings (22) and three second bushings (24). The first bushings (22) and the second bushings (24) are set at intervals and staggered.

6. A silent and durable damping hinge for a sofa armrest box according to claim 1, characterized in that: The sealing assembly includes a first stop (31), which is fixedly connected to the bottom of the shaft body (1). The shaft body (1) has an internal thread (32) inside. The shaft body (1) has a second stop (33) on the top. The second stop (33) has an anti-slip sleeve (35) for improving friction fixedly connected to the outside. The second stop (33) has an external thread (34) on it. The internal thread (32) is threaded to the outside of the external thread (34).

7. A silent and durable damping hinge for a sofa armrest box according to claim 6, characterized in that: The rotating shaft body (1) has a matching groove at the corresponding position of the second stop (33), and the bottom of the second stop (33) is set in the groove of the rotating shaft body (1).

Images