Upward-folding anti-loosening seat armrest structure

Abstract

The utility model discloses an upward-folding anti-loosening seat armrest structure which comprises an armrest body assembly, a rotating shaft, an armrest fixing side plate and an armrest limiting mechanism, the armrest body assembly comprises an armrest body, a shaft sleeve and an armrest side cover, the armrest side cover is fixedly connected with the armrest body, the shaft sleeve is installed in the armrest body, and the armrest body is installed on the rotating shaft through the shaft sleeve; the armrest limiting mechanism comprises an armrest limiting rod and an armrest body limiting hole, the armrest limiting rod is inserted into the armrest limiting hole, and the armrest body limiting hole is provided with a moving stroke of the armrest limiting rod; the armrest body assembly is connected with the armrest fixing side plate through a rotating shaft; the rotating shaft comprises a cylindrical rotating section and a U-shaped step section; the U-shaped step section is fixedly connected with the handrail fixing side plate, and the cylindrical rotating section is connected with the handrail assembly in a matched mode. Due to the fact that the rotating shaft and the handrail fixing side plate are connected through the U-shaped face, the problem that in a handrail structure, due to rotation of the rotating shaft, the handrail is loosened is solved, and the failure rate of the structure is reduced.

Description

Technical Field

[0001] The utility model relates to the field of seat armrests, and more particularly to an upward-folding and anti-loosening seat armrest structure. Background Art

[0002] A seat armrest refers to one of the supporting devices used on a seat. Its specific function is to support the hands when people are working or resting, that is, it supports the hands and limbs of the human body. In daily life, seat armrests are used very frequently. How to achieve an armrest that saves space, is safe and reliable, and meets the comfort requirements of passengers is a question worthy of consideration for technicians in this field.

[0003] The utility model with the announcement number CN211075884U discloses a folding armrest structure for rail transit seats, including an armrest frame and an armrest cover. The armrest frame is provided with a rotating mechanism and a limiting mechanism. The rotating mechanism includes a central screw, a washer, a bushing and a set screw. The limiting mechanism includes an armrest limiting body and an armrest limiting member. The armrest limiting body is connected to the armrest frame via a central screw. The washer is arranged between the central screw and the armrest limiting body. The bushing is arranged between the armrest limiting body and the armrest frame. The armrest limiting member is installed in the armrest frame and contacts the bushing. The set screw is installed on the armrest frame. The central screw in the rotating mechanism of this solution is cylindrical and matches the circular hole of the armrest frame. In the later high-frequency folding movement, the matching clearance will increase due to wear, which will easily cause the armrest to loosen, affecting passenger use. Utility Model Content

[0004] In order to solve the above-mentioned technical deficiencies, the utility model provides a folding and anti-loosening seat armrest structure. The rotating shaft is designed to be two-section, the U-shaped stage is fixedly connected to the fixed side plate of the armrest, and the cylindrical rotating section is cooperatively connected to the armrest assembly to prevent the rotating shaft from rotating and causing the armrest to loosen.

[0005] The purpose of the utility model is achieved through the following technical solutions:

[0006] A folding and anti-loosening chair armrest structure, comprising an armrest body assembly, a rotating shaft, an armrest fixed side plate and an armrest limiting mechanism; the armrest body assembly comprises an armrest body, a shaft sleeve, and an armrest side cover, the armrest side cover is fixedly connected to the armrest body, the shaft sleeve is installed in the armrest body, and the armrest body is installed on the rotating shaft through the shaft sleeve; the armrest limiting mechanism comprises an armrest limiting rod and an armrest body limiting hole, the armrest limiting rod is inserted into the armrest limiting hole, and the armrest body limiting hole is provided with a movable stroke of the armrest limiting rod; the armrest body assembly is connected to the armrest fixed side plate through the rotating shaft; the rotating shaft comprises a cylindrical rotating section and a U-shaped platform stage; the U-shaped platform stage is fixedly connected to the armrest fixed side plate, and the cylindrical rotating section is cooperatively connected to the armrest assembly.

[0007] Preferably, the armrest limiting rod is installed on the armrest fixed side plate, and the armrest limiting hole is installed on the armrest body assembly.

[0008] Preferably, the armrest limiting rod is installed on the armrest body assembly, and the armrest limiting hole is installed on the armrest fixed side panel.

[0009] Preferably, the armrest limiting hole is an arc-shaped hole with an arc angle of 80 to 120 degrees.

[0010] Preferably, the bushing is made of self-lubricating material.

[0011] Furthermore, a wear-resistant sheet is provided between the armrest body assembly and the armrest fixed side plate.

[0012] Furthermore, the thickness of the wear-resistant sheet is greater than the gap between the armrest body assembly and the armrest fixed side plate.

[0013] Furthermore, the U-shaped stage of the rotating shaft is embedded in the U-shaped hole of the armrest fixed side plate.

[0014] Furthermore, the number of installed shaft sleeves is 2.

[0015] A chair adopts the above-mentioned armrest structure.

[0016] The utility model adopts a U-shaped connection method between the rotating shaft and the armrest fixed side plate, which optimizes the problem of loosening of the armrest due to the rotation of the rotating shaft in the armrest structure, reduces the failure rate of the structure and improves the service life of the armrest. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural diagram of a folding and anti-loosening seat armrest structure;

[0018] Figure 2 This is a structural schematic diagram of an armrest body assembly of an upward folding and anti-loosening seat armrest structure;

[0019] Figure 3 This is a diagram of the rotating shaft installation structure of a folding and anti-loosening seat armrest structure;

[0020] Among them, 1. Armrest body assembly; 2. Wear-resistant plate; 3. Limit rod; 4. Armrest fixed side plate; 5. Nut; 6. Armrest body; 7. Rotating shaft; 8. Bushing; 9. Armrest side cover; 10. Screw; 11. Armrest body limit hole. DETAILED DESCRIPTION

[0021] In order to clearly illustrate the technical features of this solution, the present invention is described in detail below through specific implementation methods and in conjunction with the accompanying drawings. Many specific details are described in the following description to facilitate a full understanding of the present application. However, the present application can also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present application is not limited by the specific embodiments disclosed below. In addition, in the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, they should not be understood as limiting the present application. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly indicate the number of technical features indicated. Therefore, features defined as "first" and "second" can explicitly or implicitly include one or more of such features. In the description of this application, "plurality" means two or more, unless otherwise specified or specifically defined. In this application, unless otherwise specified or defined, terms such as "mounted," "connected," "connected," and "fixed" should be interpreted broadly. For example, they can refer to fixed, removable, or integrated connections; mechanical, electrical, or communication connections; direct or indirect connections through an intermediary; internal communication between two components; or interaction between two components. A person skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances. In this application, unless otherwise specified or defined, a first feature being "above" or "below" a second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. In this specification, references to the terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" mean that the specific features, structures, materials, or characteristics described in connection with that embodiment or example are included in at least one embodiment or example of this application. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0022] Example 1

[0023] See also Figures 1 to 3, this embodiment provides a folding and anti-loosening seat armrest structure, including an armrest body assembly, a rotating shaft 7, an armrest fixed side plate 4 and an armrest limiting mechanism, the armrest body assembly is connected to the armrest fixed side plate 4 through the rotating shaft 7; the armrest limiting mechanism includes an armrest limiting rod 3 and an armrest body limiting hole 11; the armrest body assembly includes an armrest body 6, a shaft sleeve 8, and an armrest side cover 9; the rotating shaft 7 includes a cylindrical rotating section and a U-shaped platform stage, the U-shaped platform stage is fixedly connected to the armrest fixed side plate, and the cylindrical rotating section is cooperatively connected to the armrest assembly to prevent the armrest from loosening due to the rotation of the rotating shaft. When the armrest body assembly rotates at a high frequency, the cylindrical rotating section can move smoothly, and the U-shaped platform stage is cooperatively embedded in the armrest fixed side plate 4 to ensure that the armrest body assembly will not loosen due to the rotation of the rotating shaft during movement.

[0024] In this embodiment, the armrest body 6 is mounted on the rotating shaft 7 via a sleeve 8. The sleeve 8 is made of plastic. Sleeves 8 are installed on the contact surface between the rotating shaft 7 and the armrest body 6. When the armrest rotates up and down, the sleeve 8 can eliminate the abnormal noise caused by friction. A wear-resistant sheet 2 is installed between the armrest body assembly 1 and the armrest fixed side plate 4. When the armrest body assembly 1 is folded up during use, the wear-resistant sheet 2 can buffer the friction between the two and extend the service life of the armrest. At the same time, the thickness of the wear-resistant sheet 2 can be adjusted to adjust the force required to fold the armrest body assembly 1. When a thicker wear-resistant sheet is selected, tightening the fixing bolt 5 will increase the pressure between the armrest body assembly 1 and the armrest fixed side plate 4, and the force required to rotate the armrest body assembly 1 will also increase; when a thinner wear-resistant sheet is selected, tightening the fixing bolt 5 will reduce the pressure between the armrest body assembly 1 and the armrest fixed side plate 4, and the force required to rotate the armrest body assembly 1 will also decrease.

[0025] In this embodiment, the armrest body assembly 1 is provided with an armrest limiting hole 11, and an arc-shaped hole is also provided at the corresponding position of the wear-resistant plate 2. The limiting rod 3 is installed in the armrest limiting hole 11 and is fixed to the armrest fixed side plate 4 through a nut 5. After the armrest is rotated to a certain angle, the limiting rod 3 contacts the end of the armrest limiting hole 11, and the armrest cannot continue to advance, thereby achieving a limiting effect.

[0026] Example 2

[0027] See also Figures 1 to 3, this embodiment provides a folding and anti-loosening seat armrest structure, including an armrest body assembly, a rotating shaft 7, an armrest fixed side plate 4 and an armrest limiting mechanism, the armrest body assembly is connected to the armrest fixed side plate 4 through the rotating shaft 7; the armrest limiting mechanism includes an armrest limiting rod 3 and an armrest body limiting hole 11; the armrest body assembly includes an armrest body 6, a shaft sleeve 8, and an armrest side cover 9; the rotating shaft 7 includes a cylindrical rotating section and a U-shaped platform stage, the U-shaped platform stage is fixedly connected to the armrest fixed side plate, and the cylindrical rotating section is cooperatively connected to the armrest assembly to prevent the armrest from loosening due to the rotation of the rotating shaft. When the armrest body assembly rotates at a high frequency, the cylindrical rotating section can move smoothly, and the U-shaped platform stage is cooperatively embedded in the armrest fixed side plate 4 to ensure that the armrest body assembly will not loosen due to the rotation of the rotating shaft during movement.

[0028] In this embodiment, the armrest body 6 is mounted on the rotating shaft 7 via a sleeve 8. The sleeve 8 is made of plastic. Sleeves 8 are installed on the contact surface between the rotating shaft 7 and the armrest body 6. When the armrest rotates up and down, the sleeve 8 can eliminate the abnormal noise caused by friction. A wear-resistant sheet 2 is installed between the armrest body assembly 1 and the armrest fixed side plate 4. When the armrest body assembly 1 is folded up during use, the wear-resistant sheet 2 can buffer the friction between the two and extend the service life of the armrest. At the same time, the thickness of the wear-resistant sheet 2 can be adjusted to adjust the force required to fold the armrest body assembly 1. When a thicker wear-resistant sheet is selected, tightening the fixing bolt 5 will increase the pressure between the armrest body assembly 1 and the armrest fixed side plate 4, and the force required to rotate the armrest body assembly 1 will also increase; when a thinner wear-resistant sheet is selected, tightening the fixing bolt 5 will reduce the pressure between the armrest body assembly 1 and the armrest fixed side plate 4, and the force required to rotate the armrest body assembly 1 will also decrease.

[0029] In this embodiment, the armrest body assembly 1 is provided with an armrest limiting hole 11, and an arc-shaped hole is also provided at the corresponding position of the wear-resistant plate 2. The limiting rod 3 is installed in the armrest limiting hole 11 and is fixed to the armrest fixed side plate 4 through a nut 5. After the armrest is rotated to a certain angle, the limiting rod 3 contacts the end of the armrest limiting hole 11, and the armrest cannot continue to advance, thereby achieving a limiting effect.

[0030] Furthermore, the arc angle of the armrest limiting hole can be changed according to actual needs. The stroke size of the limiting rod in the circumferential position can be changed by adjusting the arc angle of the armrest limiting hole 11, thereby changing the rotation angle of the armrest to meet the needs of different people for the folding angle of the armrest; when the arc angle is set to 90°, the limiting rod 3 can achieve 1 / 4 of the movement around the rotation axis on the circumference, thereby realizing the 90° upward folding movement of the armrest.

[0031] Example 3

[0032] The present embodiment provides a folding and anti-loosening chair armrest structure, including an armrest body assembly, a rotating shaft 7, an armrest fixed side panel 4 and an armrest limiting mechanism, wherein the armrest body assembly is connected to the armrest fixed side panel 4 via the rotating shaft 7; the armrest limiting mechanism includes an armrest limiting rod 3 and an armrest body limiting hole 11; the armrest body assembly includes an armrest body 6, a shaft sleeve 8, and an armrest side cover 9; the rotating shaft 7 includes a cylindrical rotating section and a U-shaped platform stage, the U-shaped platform stage is fixedly connected to the armrest fixed side panel, and the cylindrical rotating section is cooperatively connected to the armrest assembly to prevent the armrest from loosening due to the rotation of the rotating shaft. When the armrest body assembly rotates at a high frequency, the cylindrical rotating section can move smoothly, and the U-shaped platform stage is cooperatively embedded in the armrest fixed side panel 4 to ensure that the armrest body assembly will not loosen due to the rotation of the rotating shaft during movement.

[0033] In this embodiment, the armrest body 6 is mounted on the rotating shaft 7 via a sleeve 8. The sleeve 8 is made of plastic. Sleeves 8 are installed on the contact surface between the rotating shaft 7 and the armrest body 6. When the armrest rotates up and down, the sleeve 8 can eliminate the abnormal noise caused by friction. A wear-resistant sheet 2 is installed between the armrest body assembly 1 and the armrest fixed side plate 4. When the armrest body assembly 1 is folded up during use, the wear-resistant sheet 2 can buffer the friction between the two and extend the service life of the armrest. At the same time, the thickness of the wear-resistant sheet 2 can be adjusted to adjust the force required to fold the armrest body assembly 1. When a thicker wear-resistant sheet is selected, tightening the fixing bolt 5 will increase the pressure between the armrest body assembly 1 and the armrest fixed side plate 4, and the force required to rotate the armrest body assembly 1 will also increase; when a thinner wear-resistant sheet is selected, tightening the fixing bolt 5 will reduce the pressure between the armrest body assembly 1 and the armrest fixed side plate 4, and the force required to rotate the armrest body assembly 1 will also decrease.

[0034] Furthermore, the armrest fixing side panel 4 is provided with an armrest limiting hole 11, and the corresponding position of the wear-resistant plate 2 is also provided with an arc-shaped hole. The limiting rod 3 is installed in the armrest limiting hole 11 and is fixed to the armrest body assembly 1 through the nut 5. After the armrest is rotated to a certain angle, the limiting rod 3 contacts the end of the armrest limiting hole 11, and the armrest cannot continue to advance, thereby achieving a limiting effect.

[0035] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims rather than the foregoing description. It is intended that all variations within the meaning and range of equivalents of the claims be embraced herein, and any reference signs in the claims should not be construed as limiting the claims to which they relate.

Claims

1. A folding and anti-loosening seat armrest structure, characterized in that: It includes an armrest body assembly, a rotating shaft, an armrest fixing side plate and an armrest limiting mechanism; The armrest body assembly comprises an armrest body, a shaft sleeve, and an armrest side cover, wherein the armrest side cover is fixedly connected to the armrest body, the shaft sleeve is installed in the armrest body, and the armrest body is installed on the rotating shaft through the shaft sleeve; The armrest limiting mechanism comprises an armrest limiting rod and an armrest body limiting hole, the armrest limiting rod is inserted into the armrest limiting hole, and the armrest body limiting hole is provided with a movable stroke of the armrest limiting rod; The armrest body assembly is connected to the armrest fixed side plate through a rotating shaft; the rotating shaft includes a cylindrical rotating section and a U-shaped platform stage; the U-shaped platform stage is fixedly connected to the armrest fixed side plate, and the cylindrical rotating section is cooperatively connected to the armrest assembly.

2. The folding and anti-loosening chair armrest structure according to claim 1, characterized in that: The armrest limiting rod is installed on the armrest fixing side plate, and the armrest limiting hole is installed on the armrest body component.

3. The folding and anti-loosening chair armrest structure according to claim 1, characterized in that: The armrest limiting rod is installed on the armrest body assembly, and the armrest limiting hole is installed on the armrest fixing side plate.

4. The folding and anti-loosening chair armrest structure according to claim 1, characterized in that: The armrest limiting hole is an arc-shaped hole with an arc angle of 80 to 120 degrees.

5. The folding and anti-loosening chair armrest structure according to claim 1, characterized in that: The shaft sleeve is made of self-lubricating material.

6. The fold-up and anti-loosening chair armrest structure according to claim 1, characterized in that: A wear-resistant sheet is arranged between the armrest body assembly and the armrest fixed side plate.

7. The folding and anti-loosening chair armrest structure according to claim 6, characterized in that: The thickness of the wear-resistant sheet is greater than the gap between the armrest body assembly and the armrest fixed side plate.

8. The fold-up and anti-loosening chair armrest structure according to claim 1, characterized in that: The U-shaped stage of the rotating shaft is embedded in the U-shaped hole of the armrest fixing side plate.

9. The fold-up and anti-loosening chair armrest structure according to claim 1, characterized in that: The number of installed shaft sleeves is 2.

10. A seat, characterized in that The invention comprises the folding and anti-loosening chair armrest structure as described in any one of claims 1 to 9.

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