A rotary armrest for a business car seat for the elderly

Abstract

The utility model discloses a business car old age special seat rotating handrail relates to the technical field of automobile accessories, including handrail body, angle limiting mechanism, spline shaft, fixed shaft and transmission mechanism, one side of handrail body is provided with spline shaft, one end of spline shaft is located inside handrail body, be provided with fixed shaft in handrail body, be connected through transmission mechanism between fixed shaft with spline shaft, be provided with angle limiting mechanism on spline shaft, angle limiting mechanism connects transmission mechanism. In the utility model, first connecting piece and second connecting piece pass through the cooperation of the tooth groove and the tooth block, and the spline connection of spline shaft and second connecting piece greatly reduces the jam phenomenon when rotating. The old people only need to apply force slightly, and can adjust the handrail angle smoothly, without struggling to move.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts technology, and in particular to a rotating armrest for a commercial vehicle seat designed for elderly people. Background Technology

[0002] Commercial vehicles, with their spacious interiors and relatively comfortable seating, have become a popular choice for senior citizens. As a crucial component affecting the seniors' riding experience, the performance of the seat armrests directly impacts their comfort and convenience during the journey.

[0003] Currently, the armrests of commercial vehicle seats on the market achieve rotation through a connection between a shaft and a sleeve. However, after prolonged use, wear and tear can cause changes in the gap between the shaft and the sleeve, leading to increased friction and causing jamming during rotation. This jamming makes it extremely inconvenient for elderly people to adjust the armrest angle, sometimes requiring them to use force to achieve the desired adjustment. Utility Model Content

[0004] The purpose of this utility model is to provide a rotating armrest for elderly seats in commercial vehicles, in order to solve the above-mentioned technical problems.

[0005] The technical solution adopted in this utility model is as follows:

[0006] A rotating armrest for a commercial vehicle seat designed for elderly users includes an armrest body, an angle limiting mechanism, a splined shaft, a fixed shaft, and a transmission mechanism. The splined shaft is located on one side of the armrest body, with one end of the splined shaft inside the armrest body. The fixed shaft is located inside the armrest body, and the fixed shaft is connected to the splined shaft via the transmission mechanism. The angle limiting mechanism is located on the splined shaft and is connected to the transmission mechanism.

[0007] Preferably, the transmission mechanism includes a first connecting piece and a second connecting piece. One end of the first connecting piece is connected to the fixed shaft, and one end of the second connecting piece is connected to the spline shaft. The other end of the first connecting piece is provided with a plurality of tooth grooves, and the other end of the second connecting piece is provided with tooth blocks.

[0008] As a further preferred embodiment, one end of the second connecting piece is provided with a circular hole, the spline shaft passes through the circular hole, and a first keyway that mates with the spline shaft is formed on the inner wall of the circular hole.

[0009] As a further preferred embodiment, the angle limiting mechanism includes a fixing block, a limiting plate, and a guide post. The fixing block is disposed on the outer wall of the spline shaft. One side of the fixing block abuts against the inner wall of one side of the handrail body, and the other side of the fixing block abuts against the second connecting piece. The guide post is disposed on the fixing block, and the limiting plate is disposed on the spline shaft. The limiting plate is keyed to the spline shaft and connected to the second connecting piece. A guide groove that mates with the guide post is provided on the limiting plate.

[0010] As a further preferred embodiment, the fixing block is fixedly connected to the spline shaft, and the limiting plate is fixedly connected to the second connecting piece.

[0011] As a further preferred embodiment, the first connecting piece is fixedly connected to the fixed shaft.

[0012] The above technical solution has the following advantages or beneficial effects:

[0013] In this invention, the first and second connecting pieces are connected by toothed grooves and toothed blocks, and the spline shaft is connected to the second connecting piece by a spline, which greatly reduces the jamming during rotation. Elderly people can easily adjust the armrest angle with just a light touch, without having to strain it.

[0014] In this invention, the angle limiting mechanism provides a reasonable angle range limit for the rotation of the handrail; on the one hand, it avoids structural damage that may be caused by excessive rotation of the handrail and extends the service life of the handrail; on the other hand, it prevents accidental injury to the elderly caused by excessive rotation of the handrail, such as collision with other objects in the vehicle or loss of balance. Attached Figure Description

[0015] Figure 1 This is a perspective view of the rotating armrest of the commercial vehicle seat designed for the elderly in this utility model.

[0016] Figure 2 This is a side view of the rotating armrest of the commercial vehicle seat for the elderly in this utility model;

[0017] Figure 3 yes Figure 2 Sectional view along line AA;

[0018] Figure 4 This is an exploded view of the angle limiting mechanism, spline shaft, fixed shaft and transmission mechanism in this utility model.

[0019] In the diagram: 1. Handrail body; 2. Angle limiting mechanism; 3. Spline shaft; 4. Fixed shaft; 5. Transmission mechanism; 6. First connecting piece; 7. Second connecting piece; 8. First keyway; 9. Gear groove; 10. Gear block; 11. Fixed block; 12. Limiting plate; 13. Guide post; 14. Guide groove; 15. Key. Detailed Implementation

[0020] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0021] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model 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 utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] Figure 1 This is a perspective view of the rotating armrest of the commercial vehicle seat designed for the elderly in this utility model. Figure 2 This is a side view of the rotating armrest of the commercial vehicle seat for the elderly in this utility model; Figure 3 yes Figure 2 Sectional view along line AA; Figure 4 This is an exploded view of the angle limiting mechanism, splined shaft, fixed shaft, and transmission mechanism in this utility model. Please refer to [link / reference]. Figures 1 to 4The diagram illustrates a preferred embodiment of a rotating armrest for elderly-oriented seats in commercial vehicles. It includes an armrest body 1, an angle limiting mechanism 2, a splined shaft 3, a fixed shaft 4, and a transmission mechanism 5. The splined shaft 3 is located on one side of the armrest body 1, with one end inside the armrest body 1. The fixed shaft 4 is located inside the armrest body 1, and the fixed shaft 4 is connected to the splined shaft 3 via the transmission mechanism 5. The angle limiting mechanism 2 is mounted on the splined shaft 3 and connected to the transmission mechanism 5. In this embodiment, the armrest body 1 is made of high-strength and lightweight engineering plastic, such as ABS plastic, with a smooth surface and an anti-slip sleeve to facilitate gripping by the elderly. A mounting hole for the splined shaft 3 is provided on one side of the armrest body 1, with a smooth inner wall to ensure the armrest body 1 can rotate flexibly relative to the splined shaft 3. Simultaneously, reasonable accommodating spaces are designed within the armrest body 1 corresponding to the positions of the fixed shaft 4 and the transmission mechanism 5, ensuring a compact layout and no interference between the components after installation.

[0024] In this embodiment, the transmission mechanism 5 allows the force acting on the handrail to be transmitted to the angle limiting mechanism 2. The angle limiting mechanism 2 restricts the rotation angle range of the handrail body 1, which is 0~90°. The rotation angle of the handrail body 1 can be adjusted as needed. Once the angle is fixed, passengers can place their arms on the handrail body 1 to improve comfort. The rotation direction of the handrail body 1 is vertical.

[0025] Furthermore, as a preferred embodiment, the transmission mechanism 5 includes a first connecting piece 6 and a second connecting piece 7. One end of the first connecting piece 6 is connected to the fixed shaft 4, and one end of the second connecting piece 7 is connected to the spline shaft 3. The other end of the first connecting piece 6 is provided with a plurality of toothed grooves 9, and the other end of the second connecting piece 7 is provided with toothed blocks 10. In this embodiment, through the mutual cooperation of the toothed grooves 9 and the toothed blocks 10, the force can be transmitted from the first connecting piece 6 to the second connecting piece 7, thereby driving the second connecting piece 7 to rotate.

[0026] Furthermore, as a preferred embodiment, one end of the second connecting piece 7 is provided with a circular hole, through which the spline shaft 3 passes. A first keyway 8, which mates with the spline shaft 3, is formed on the inner wall of the circular hole. Several keys 15 are provided on the outer wall of the spline shaft 3. These keys 15 mate with the first keyway 8. The keys 15 are relatively thin and narrow, and are made of plastic, possessing a certain degree of elasticity. This allows for both fixing the second connecting piece 7 and allowing it to rotate under force, thus facilitating adjustment of the angle of the handrail body 1. It also ensures that the handrail body 1 remains at a fixed angle when a passenger's arm is placed on it. The handrail body 1 can only rotate when a certain force is applied.

[0027] Furthermore, as a preferred embodiment, the angle limiting mechanism 2 includes a fixing block 11, a limiting plate 12, and a guide post 13. The fixing block 11 is disposed on the outer wall of the spline shaft 3. One side of the fixing block 11 abuts against the inner wall of one side of the handrail body 1, and the other side of the fixing block 11 abuts against the second connecting piece 7. The guide post 13 is disposed on the fixing block 11, and the limiting plate 12 is disposed on the spline shaft 3. The limiting plate 12 is keyed to the spline shaft 3 and connected to the second connecting piece 7. The limiting plate 12 has a guide groove 14 that cooperates with the guide post 13. In this embodiment, the keyed connection between the second connecting piece 7 and the spline shaft 3, and the keyed connection between the limiting piece and the spline shaft 3, ensures connection stability and transmission accuracy. The fixing block 11 is fixedly connected to the spline shaft 3 and abuts against the inner wall of the handrail body 1 and the second connecting piece 7, thus providing support. When a moving force is applied to the handrail, the handrail body 1 rotates, transmitting the force to the first connecting piece 6 and the second connecting piece 7. At this time, the second connecting piece 7 drives the limiting plate 12 to overcome the resistance of the key 15 on the spline shaft 3 and rotate relative to the spline shaft 3, thus adjusting the angle of the handrail body 1. When the guide post 13 abuts against the inner wall of the guide groove 14, it indicates that the handrail body 1 has rotated to its maximum angle. After the handrail body 1 has rotated to the appropriate angle, releasing the handrail body 1 allows the key 15 on the spline shaft 3 to fix the positions of the second connecting piece 7 and the limiting plate 12, thereby locking the angle of the handrail body 1 and preventing wobbling during use.

[0028] The limiting plate 12 is provided with a through hole, and the inner wall of the through hole is provided with a second key 15 groove for key engagement with the spline shaft 3.

[0029] In this embodiment, the fixing block 11 and the spline shaft 3 can be welded together, the limiting plate 12 and the second connecting piece 7 can be fixedly connected by welding or by bolts, the first connecting piece 6 and the fixing shaft 4 are welded together, and the fixing shaft 4 is fixedly connected to the inner wall of one side of the handrail body 1 by welding.

[0030] For details regarding the structure of the first connecting piece 6, the second connecting piece 7, and the limiting plate 12, please refer to [link / reference]. Figure 4 As shown.

[0031] The above description is only a preferred embodiment of the present utility model and does not limit the implementation method and protection scope of the present utility model. Those skilled in the art should realize that all solutions obtained by equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A rotating armrest for elderly-oriented seats in commercial vehicles, characterized in that, The armrest includes an armrest body, an angle limiting mechanism, a spline shaft, a fixed shaft, and a transmission mechanism. The spline shaft is provided on one side of the armrest body, and one end of the spline shaft is located inside the armrest body. The fixed shaft is provided inside the armrest body, and the fixed shaft is connected to the spline shaft through the transmission mechanism. The angle limiting mechanism is provided on the spline shaft and is connected to the transmission mechanism.

2. The rotating armrest for elderly-oriented seats in commercial vehicles as described in claim 1, characterized in that, The transmission mechanism includes a first connecting piece and a second connecting piece. One end of the first connecting piece is connected to the fixed shaft, and one end of the second connecting piece is connected to the spline shaft. The other end of the first connecting piece is provided with a plurality of tooth grooves, and the other end of the second connecting piece is provided with tooth blocks.

3. The rotating armrest for elderly-oriented seats in commercial vehicles as described in claim 2, characterized in that, One end of the second connecting piece is provided with a circular hole, through which the spline shaft passes. A first keyway that mates with the spline shaft is provided on the inner wall of the circular hole.

4. The rotating armrest for elderly-oriented seats in commercial vehicles as described in claim 3, characterized in that, The angle limiting mechanism includes a fixing block, a limiting plate, and a guide post. The fixing block is disposed on the outer wall of the spline shaft. One side of the fixing block abuts against the inner wall of one side of the handrail body, and the other side of the fixing block abuts against the second connecting piece. The guide post is disposed on the fixing block, and the limiting plate is disposed on the spline shaft. The limiting plate is keyed to the spline shaft and connected to the second connecting piece. A guide groove that mates with the guide post is provided on the limiting plate.

5. The rotating armrest for elderly-specific seats in commercial vehicles as described in claim 4, characterized in that, The fixing block is fixedly connected to the spline shaft, and the limiting plate is fixedly connected to the second connecting piece.

6. The rotating armrest for elderly-specific seats in commercial vehicles as described in claim 2, characterized in that, The first connecting piece is fixedly connected to the fixed shaft.

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