Hinge mechanism for connecting seat guide rail and backrest guide rail

Abstract

The utility model discloses a hinge mechanism for connecting a seat guide rail and a backrest guide rail, which comprises a first connecting plate, a second connecting plate, a hinge bolt, a telescopic plate and a locking nut, the upper end of the first connecting plate is fixedly arranged on the upper side of the rear end of the seat guide rail, and the lower end of the first connecting plate is positioned on the outer side of the backrest guide rail and is provided with a first hinge disc; the upper end of the second connecting plate is fixedly arranged on the upper side of the lower end of the backrest guide rail, the lower end of the second connecting plate is located on the outer side of the backrest guide rail and fixedly provided with a second hinge disc, the first hinge disc and the second hinge disc are provided with coaxial hinge holes, and the rod end of the hinge bolt penetrates through the hinge holes and then is in threaded connection with a locking nut. One end of the telescopic plate is fixedly arranged on the upper side of the back end of the backrest guide rail, a telescopic hole is formed in the upper side of the lower end of the backrest guide rail, and the other end of the telescopic plate slidably extends into the backrest guide rail from the telescopic hole. According to the utility model, the hinge mechanism is improved, so that the structure of the hinge mechanism is more compact, and the aesthetic degree and the space utilization rate are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of massage chairs, in particular to a hinge mechanism for connecting a seat guide rail and a backrest guide rail. Background Art

[0002] Massage chairs are devices that can provide a comfortable massage experience, relieve fatigue and promote physical health. With the improvement of people's living standards and the emphasis on health, the performance and comfort requirements of massage chairs are getting higher and higher. Traditional massage chairs have certain limitations. The guide rail structure of some massage chairs is usually relatively fixed, and the angle cannot be flexibly adjusted to adapt to the body curves and massage needs of different users, which may lead to unsatisfactory massage effects and difficulty in accurately massaging various parts of the body.

[0003] Some existing variable angle guide rail structures also have some problems, such as Figure 1 As shown, the Chinese utility model discloses a variable angle guide rail structure for a massage chair (application number: CN2021219993859), which discloses a guide rail, which consists of an upper guide rail 1 and a lower guide rail 2 that are independent of each other. The upper guide rail 1 is arranged to be flippable and variable angle around a fixed support shaft 7. An upper guide block 5 and a lower guide block 6 are provided at the lower corner position of the upper guide rail 1. The upper and lower guide blocks are fixed on the upper guide rail 1. When the connection angle between the upper guide rail and the lower guide rail is changed, the upper guide rail rotates around the fixed support shaft 7, and the angle of the upper guide rail is changed under the joint action of the upper and lower guide blocks. The fixed support shaft 7 is suspended, and a higher strength is required to maintain stability, which not only increases the difficulty and cost of manufacturing, but also the larger fixed support shaft occupies more space, making the overall structure of the massage chair larger, affecting the appearance and usage space.

[0004] In summary, in order to meet users' higher performance and comfort requirements for massage chairs and solve the problems existing in the existing guide rail structure, it is particularly important to develop a more optimized, efficient and compact variable angle guide rail structure for massage chairs. Utility Model Content

[0005] In view of this, the utility model proposes an articulated mechanism for connecting a seat rail and a backrest rail, and improves the structure of the articulated mechanism to make the articulated mechanism more compact, thereby improving the aesthetics and the utilization rate of the use space.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A hinge mechanism for connecting a seat rail and a backrest rail, wherein the backrest rail and the seat rail are both U-shaped rails with side openings, the lower end of the backrest rail is connected to the rear end of the seat rail through a hinge mechanism, the hinge mechanism includes a first connecting plate, a second connecting plate, a hinge bolt, a telescopic plate and a locking nut, the upper end of the first connecting plate is fixedly arranged on the upper side of the rear end of the seat rail, the lower end of the first connecting plate is located on the outer side of the backrest rail and is fixedly provided with a first hinge plate, the upper end of the second connecting plate The hinge has two cams, one end of which is provided with a second hinge plate, the other end of which is provided with a second hinge hole, and the other end of which is provided with a second hinge hole.

[0008] In order to better implement the above technical solution, optionally, the front side of the lower end of the second connecting plate is concave to form an open groove for accommodating the first hinge plate.

[0009] Optionally, the articulated mechanism further comprises a copper sleeve, which is sleeved on the articulated bolt and clamped between the first articulated plate and the locking nut, and the second articulated plate is sleeved on the outer wall of the small-diameter pipe section of the copper sleeve.

[0010] Optionally, a bolt accommodating opening is formed at the ends of the first connecting plate and the second connecting plate that are close to each other, and the end cap of the hinge bolt is located in the bolt accommodating opening.

[0011] Optionally, the telescopic plate is an elastic plastic plate.

[0012] Optionally, the telescopic plate has a multi-section bent structure.

[0013] Optionally, the first connecting plate and the second connecting plate are both L-shaped structures.

[0014] Optionally, a gasket sleeved on the hinge bolt is clamped between the locking nut and the second hinge plate.

[0015] Optionally, curved racks are assembled in the grooves of the backrest guide rail and the seat guide rail.

[0016] Optionally, the curved rack is a whole-segment curved rack or a segmented curved rack.

[0017] Beneficial effects of the utility model:

[0018] The utility model discloses an articulated mechanism for connecting a seat rail and a backrest rail, wherein the articulated structure is arranged at the lower end of the backrest rail and the rear end of the seat rail, and the structure is compact and simple. At the same time, by arranging a telescopic plate, the minimum angle of the backrest rail relative to the seat rail can be limited, and during the rotation of the backrest rail relative to the seat rail, the telescopic plate always effectively blocks the opening formed between the upper side of the rear end of the seat rail and the upper side of the lower end of the backrest rail, so that the upper side of the rear end of the seat rail and the upper side of the lower end of the backrest rail are in a dynamically closed state, which significantly improves the aesthetics and stability of the connection between the rear end of the seat rail and the lower end of the backrest rail. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of a variable angle guide rail structure of a massage chair in the prior art;

[0020] Figure 2 It is a three-dimensional schematic diagram of a hinge mechanism for connecting a seat rail and a backrest rail in Embodiment 1 of the present utility model (the backrest rail is in an upright state);

[0021] Figure 3 It is a three-dimensional schematic diagram of a hinge mechanism for connecting a seat rail and a backrest rail in Embodiment 1 of the present utility model (the backrest rail is in an inverted state);

[0022] Figure 4 yes Figure 3 Exploded diagram of

[0023] Figure 5 yes Figure 4 A magnified view of the local structure;

[0024] Figure 6 This is a schematic structural diagram of an integral rack in a hinge mechanism for connecting a seat rail and a backrest rail in Embodiment 2 of the present utility model;

[0025] Figure 7 This is a schematic diagram of the structure of a segmented spliced ​​rack in a hinge mechanism for connecting a seat rail and a backrest rail in Example 2 of the utility model;

[0026] Reference numerals:

[0027] Backrest guide rail 10, seat guide rail 20, telescopic hole 21, hinge mechanism 30, first connecting plate 31, first hinge disk 311, second connecting plate 32, second hinge disk 321, opening groove 322, hinge hole 323, hinge bolt 33, telescopic plate 34, locking nut 35, copper sleeve 36, bolt receiving opening 37, gasket 38, integral rack 40, first section 41, second section 42, third section 43. DETAILED DESCRIPTION

[0028] The technical solution of the utility model is described in detail below in conjunction with the accompanying drawings and specific embodiments, wherein the same components are represented by the same reference numerals.

[0029] Example 1

[0030] See also Figures 2 to 5 The embodiment of the utility model discloses an articulated mechanism for connecting a seat rail and a backrest rail, comprising a backrest rail 10, a seat rail 20 and an articulated mechanism 30. The lower end of the backrest rail 10 is connected to the rear end of the seat rail 20 through the articulated mechanism 30, so that the backrest rail 10 can rotate relative to the seat rail 20 around the articulated point.

[0031] like Figure 2 and Figure 3 As shown, the backrest rail 10 and the seat rail 20 are both U-shaped rails with side openings. Specifically, there are two backrest rails 10 and two seat rails 20, the openings of the two backrest rails 10 are arranged opposite to each other, the openings of the two seat rails 20 are also arranged opposite to each other, and the openings of the backrest rail 10 and the seat rail 20 on the same side are connected to each other.

[0032] like Figures 3 to 5 As shown, the hinge mechanism 30 includes a first connecting plate 31, a second connecting plate 32, a hinge bolt 33, a telescopic plate 34 and a locking nut 35. The upper end of the first connecting plate 31 is fixedly arranged on the upper side of the rear end of the seat guide rail 20, the lower end of the first connecting plate 31 is located on the outer side of the backrest guide rail 10 and is fixedly provided with a first hinge plate 311, the upper end of the second connecting plate 32 is fixedly arranged on the upper side of the lower end of the backrest guide rail 10, the lower end of the second connecting plate 32 is located on the outer side of the backrest guide rail 10 and is fixedly provided with a first hinge plate 311. Two hinge plates 321, the first hinge plate 311 and the second hinge plate 321 are provided with coaxial hinge holes 323, the rod ends of the hinge bolts 33 pass through the hinge holes 323 of the first hinge plate 311 and the second hinge plate 321 in sequence and are screwed with locking nuts 35, one end of the telescopic plate 34 is fixed on the upper side of the rear end of the backrest guide rail 10, and a telescopic hole 21 is provided on the upper side of the lower end of the backrest guide rail 10, and the other end of the telescopic plate 34 slides through the telescopic hole 21 and extends into the backrest guide rail 10.

[0033] Specifically, the first connecting plate 31 and the second connecting plate 32 are both sheet metal parts. The upper end of the first connecting plate 31 is fixed to the upper side of the rear end of the seat guide 20 by welding, and the upper end of the second connecting plate 32 is also fixed to the upper side of the lower end of the backrest guide 10 by welding. The first hinge plate 311 and the first connecting plate 31 are an integral structure, which greatly enhances the connection strength between the first hinge plate 311 and the first connecting plate 31, ensuring that they are not prone to loosening or breaking during long-term use. The second hinge plate 321 is fixed to the lower end of the second connecting plate 32 by welding, which effectively increases the connection strength between the second hinge plate 321 and the second connecting plate 32, thereby improving the reliability of the entire structure.

[0034] The embodiment of the utility model discloses an articulated mechanism for connecting a seat rail and a backrest rail, wherein the articulated structure is arranged on the lower end of the backrest rail 10 and the rear end of the seat rail 20, and the structure is compact and simple. At the same time, by arranging a telescopic plate 34, the minimum angle of the backrest rail 10 relative to the seat rail 20 can be limited, and during the rotation of the backrest rail 10 relative to the seat rail 20, the telescopic plate 34 always effectively blocks the opening formed between the upper side of the rear end of the seat rail 20 and the upper side of the lower end of the backrest rail 10, so that the upper side of the rear end of the seat rail 20 and the upper side of the lower end of the backrest rail 10 are in a dynamically closed state, which significantly improves the aesthetics and stability of the connection between the rear end of the seat rail 20 and the lower end of the backrest rail 10.

[0035] In an embodiment of the utility model, the front side of the lower end of the second connecting plate 32 is recessed to form an opening groove 322 for accommodating the first hinge disk 311. When the backrest guide rail 10 is rotated to an upright state, the first hinge disk 311 is located in the opening groove 322. The provision of the opening groove 322 allows the second connecting plate 32 and the first hinge disk 311 to be in the same extension direction, thereby helping to increase the compactness of the structure of the first hinge disk 311 and the second connecting plate 32 and saving space.

[0036] In an embodiment of the utility model, the articulated mechanism 30 also includes a copper sleeve 36, which is sleeved on the articulated bolt 33 and clamped between the first articulated disk 311 and the locking nut 35. The second articulated disk 321 is sleeved on the outer wall of the small-diameter pipe section of the copper sleeve 36. The copper sleeve 36 can disconnect the second articulated disk 321 and the articulated bolt 33 from each other, so that the rotation cooperation between the copper sleeve 36 and the second articulated disk 321 is smoother and more unobstructed, effectively reducing friction and wear. A gasket 38 sleeved on the articulated bolt 33 is clamped between the locking nut 35 and the second articulated disk 321. The gasket 38 can make the force borne by the connecting component more uniform, avoid deformation or damage caused by excessive local force, and extend the service life of the component.

[0037] In an embodiment of the utility model, a bolt accommodating opening 37 is provided at the end portions of the first connecting plate 31 and the second connecting plate 32 which are close to each other, and the end cap of the hinge bolt 33 is located in the bolt accommodating opening 37. The bolt accommodating opening 37 on the first connecting plate 31 and the second connecting plate 32 is a semicircular structure, and the end cap of the hinge bolt 33 is placed in the bolt accommodating opening 37, so that the hinge bolt 33 does not occupy the space in the backrest guide rail 10 and the seat guide rail 20, thereby optimizing the internal structure layout and improving space utilization.

[0038] In an embodiment of the utility model, the telescopic plate 34 has a multi-section bending structure and is an elastic plastic plate. By utilizing the bending structure of the telescopic plate 34, the front end of the telescopic plate 34 can be fixed to the upper end of the first connecting plate 31, and the rear end of the telescopic plate 34 can be easily placed in the U-shaped groove of the backrest guide rail 10. By utilizing the elastic properties of the elastic plastic plate, it can be ensured that the part of the telescopic plate 34 located in the backrest guide rail 10 always rests against the telescopic opening.

[0039] In the embodiment of the present invention, the first connecting plate 31 and the second connecting plate 32 are both L-shaped structures, which is more convenient for installation.

[0040] Example 2

[0041] like Figures 2 to 7 As shown, this embodiment is further improved based on embodiment 1, and the improvement is:

[0042] The grooves of the backrest rail 10 and the seat rail 20 are provided with a curved rack 40, wherein Figure 6 As shown, the curved rack 40 is a whole curved rack, and its material is preferably POM, such as Figure 7 As shown, the curved rack 40 is a segmented spliced ​​curved rack, which is divided into a first section 41, a second section 42 and a third section 43, wherein the first section 41 is installed in the backrest rail 10, the third section 43 is installed in the seat rail 20, and the second section 42 is installed at the hinge between the backrest rail 10 and the seat rail 20. The first section 41 and the third section 43 are made of POM material, and the second section 42 is made of nylon material. The segmented spliced ​​curved rack 40 has better applicability, and the whole-section curved rack 40 has low manufacturing cost.

[0043] The technical solution of the utility model is described in detail above in combination with specific embodiments, and the described specific embodiments are used to help understand the concept of the utility model. Derivations and variations made by those skilled in the art based on the specific embodiments of the utility model also fall within the protection scope of the utility model.

Claims

1. A hinge mechanism for connecting a seat rail and a backrest rail, wherein the backrest rail (10) and the seat rail (20) are both U-shaped rails with side openings, and the lower end of the backrest rail (10) is connected to the rear end of the seat rail (20) via a hinge mechanism (30), characterized in that: The hinge mechanism (30) comprises a first connecting plate (31), a second connecting plate (32), a hinge bolt (33), a telescopic plate (34) and a locking nut (35); the upper end of the first connecting plate (31) is fixedly arranged on the upper side of the rear end of the seat guide rail (20); the lower end of the first connecting plate (31) is located on the outer side of the backrest guide rail (10) and is fixedly provided with a first hinge plate (311); the upper end of the second connecting plate (32) is fixedly arranged on the upper side of the lower end of the backrest guide rail (10); the lower end of the second connecting plate (32) is located on the outer side of the backrest guide rail (10) and is fixedly provided with a second hinge plate (311); The hinge plate (321) comprises a hinged plate (321), the first hinged plate (311) and the second hinged plate (321) are provided with coaxial hinged holes (323), the rod ends of the hinged bolts (33) are sequentially passed through the hinged holes (323) of the first hinged plate (311) and the second hinged plate (321) and then are screwed with locking nuts (35), one end of the telescopic plate (34) is fixedly arranged on the upper side of the rear end of the backrest guide rail (10), the upper side of the lower end of the backrest guide rail (10) is provided with a telescopic hole (21), and the other end of the telescopic plate (34) slides through the telescopic hole (21) and extends into the backrest guide rail (10).

2. A hinge mechanism for connecting a seat rail and a backrest rail according to claim 1, characterized in that: The front side of the lower end of the second connecting plate (32) is concave to form an open groove (322) for accommodating the first hinge plate (311).

3. The hinge mechanism for connecting a seat rail and a backrest rail according to claim 1, characterized in that: The hinge mechanism (30) further comprises a copper sleeve (36), wherein the copper sleeve (36) is sleeved on the hinge bolt (33) and clamped between the first hinge plate (311) and the locking nut (35), and the second hinge plate (321) is sleeved on the outer wall of the small-diameter pipe section of the copper sleeve (36).

4. The hinge mechanism for connecting a seat rail and a backrest rail according to claim 1, characterized in that: The ends of the first connecting plate (31) and the second connecting plate (32) close to each other are provided with bolt accommodating openings (37), and the end caps of the hinge bolts (33) are located in the bolt accommodating openings (37).

5. The hinge mechanism for connecting a seat rail and a backrest rail according to claim 1, characterized in that: The telescopic plate (34) is an elastic plastic plate.

6. The hinge mechanism for connecting a seat rail and a backrest rail according to claim 5, characterized in that: The telescopic plate (34) is a multi-section bent structure.

7. The hinge mechanism for connecting a seat rail and a backrest rail according to claim 1, characterized in that: The first connecting plate (31) and the second connecting plate (32) are both L-shaped structures.

8. The hinge mechanism for connecting a seat rail and a backrest rail according to claim 1, characterized in that: A washer (38) sleeved on the hinge bolt (33) is clamped between the locking nut (35) and the second hinge plate (321).

9. The hinge mechanism for connecting a seat rail and a backrest rail according to claim 1, characterized in that: Curved racks (40) are assembled in the groove bodies of the backrest guide rail (10) and the seat guide rail (20).

10. The hinge mechanism for connecting a seat rail and a backrest rail according to claim 9, characterized in that: The curved rack (40) is a whole-section curved rack or a segmented spliced ​​curved rack.

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