Driving mechanism for an armrest of a car seat and car seat thereof

Abstract

The utility model discloses a kind of driving mechanism for automobile seat armrest and automobile seat, including electric handrail driver, seat framework, reduction mechanism and armrest;The driving shaft of electric handrail driver is arranged in seat framework, and transmission is in the output shaft of reduction mechanism;Output shaft is connected to box cover plate and is fixedly connected to armrest;Torsion spring is sleeved on output shaft, electric handrail driver is fixedly arranged in the inner chamber of seat framework;Reduction mechanism is fixedly connected on the outside of seat framework, armrest is placed in the outside direction of seat framework. Through the arrangement form of electric handrail, seat framework, reduction mechanism and armrest, while the radial dimension of reduction mechanism itself is small, installation is compact, the overall structure of the utility model is compact, and the volume of armrest electric adjusting device is significantly reduced, structure is simplified, compatibility for different armrest needs is improved, to meet the development needs of modern seat light weight, miniaturization, high degree of integration.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts, specifically to a drive mechanism for an automotive seat armrest, and an automotive seat including such a drive mechanism. Background Technology

[0002] Electric seat adjustment utilizes motor control and corresponding mechanism transmission to adjust various positions of the car seat, such as backrest angle, fore-aft position, height, and armrest position. In existing electric seat armrest designs, the electric adjustment function typically relies on traditional motor and gearbox structures. However, these structures suffer from problems such as large space requirements, complex structures, and poor adaptability, resulting in bulky internal layouts, high manufacturing costs, and difficulty in adapting to different armrest models.

[0003] The seat armrest is located on the side of the car seat, and its position is very close to the door or adjacent seat. However, the space in the cockpit is limited, and car manufacturers have extremely strict requirements for the utilization rate of the cockpit space. Therefore, the existing electric seat armrests, which are relatively bulky and occupy a lot of space, can hardly meet the increasingly high requirements of modern car seats in terms of lightweighting, miniaturization, and adaptability. Utility Model Content

[0004] To overcome the shortcomings of the prior art, one objective of this utility model is to provide a drive mechanism for automobile seat armrests, and another objective is to provide an automobile seat including such a drive mechanism, which can solve the problems of large space occupation, complex structure and poor adaptability of current electric seat armrest adjustment mechanisms.

[0005] This utility model is achieved through the following technical solution:

[0006] A drive mechanism for an automotive seat armrest includes: an electric armrest driver with a drive shaft for outputting rotational motion; a seat frame; and a reduction mechanism including a housing cover, an output shaft, and a torsion spring. The drive shaft passes through the seat frame and is meshed with the output shaft via a transmission gear set. The housing cover covers the outside of the transmission gear set, and the output shaft passes through the housing cover. The torsion spring is sleeved on the output shaft, and its two ends are respectively fixed to the housing cover and the output shaft. An armrest is provided, with one end of the output shaft fixedly connected to the armrest. The rotation axis of the output shaft coincides with the rotation axis of the seat frame. The seat frame has an inner cavity, the electric armrest driver is fixed to the inner cavity of the seat frame, the reduction mechanism is fixed to the outer side of the seat frame, and the armrest is positioned on the outer side of the seat frame.

[0007] Furthermore, the output shaft has a square shaft segment, and the handrail is correspondingly provided with a square mounting connection hole, so that the output shaft drives the handrail to rotate through the square shaft segment.

[0008] Furthermore, the deceleration mechanism also includes: a torsion spring fixing plate; the torsion spring fixing plate is disposed on the outer side of the housing cover plate, and a through hole is formed on the torsion spring fixing plate; a connecting hole is formed on the output shaft; the two ends of the torsion spring are respectively fixed in the through hole of the torsion spring fixing plate and the connecting hole of the output shaft.

[0009] Furthermore, the deceleration mechanism also includes: a housing bottom plate; the housing bottom plate is fastened to the outer side of the seat frame; the housing cover plate is closed on the housing bottom plate to form a storage cavity together with the housing bottom plate; the transmission gear set is rotatably disposed in the storage cavity.

[0010] Furthermore, the deceleration mechanism also includes a limiting block; both the housing cover plate and the housing bottom plate have limiting block mounting holes, and the limiting block is simultaneously fixedly disposed in the housing cover plate and the housing bottom plate to limit the housing cover plate.

[0011] Furthermore, the output shaft has a circular shaft section, the torsion spring is sleeved on the circular shaft section, and the circular shaft section is positioned between the armrest and the housing cover.

[0012] Furthermore, the reduction mechanism also includes a bushing; the bushing is sleeved on the output shaft, and the output shaft passes through the bushing into the output shaft mounting hole of the housing cover plate.

[0013] Furthermore, the deceleration mechanism also includes a retaining ring; the retaining ring is sleeved on the drive shaft, and the drive shaft passes through the drive shaft mounting hole in the bottom plate of the housing via the retaining ring.

[0014] Furthermore, the electric handrail drive also includes: a motor and a worm gear mechanism; the motor shaft of the motor is fixedly connected to the worm of the worm gear mechanism, and the drive shaft is fixedly connected to the worm wheel of the worm gear mechanism.

[0015] A car seat, including the aforementioned drive mechanism for the car seat armrest.

[0016] Compared with existing technologies, the beneficial effects that this utility model can achieve are as follows:

[0017] This utility model has two working modes: storage mode and working mode. (1) When in storage mode, the drive shaft of the electric armrest driver outputs rotational motion, which drives the output shaft of the reduction mechanism to rotate through the transmission gear set. The torsion spring generates torsion and elastic deformation, providing smooth assistance and stable buffer. The output shaft drives the armrest to rotate upward relative to the seat frame until the armrest is aligned with the side of the seat, thus realizing the storage of the armrest. (2) When in working mode, no matter how the backrest angle of the seat frame is adjusted, the electric armrest driver always outputs torque with the same rotational speed and opposite direction to the backrest adjustment. No matter what angle the seat backrest is adjusted to, the armrest always remains horizontal, ensuring that the passenger's hands can always rest stably and comfortably on it.

[0018] In this invention, the electric armrest drive is housed inside the seat frame, and the reduction mechanism is fixed on the outer surface of the seat frame. The reduction mechanism itself has a small radial dimension and a compact installation structure, which can be tightly connected to the armrest. This arrangement results in a compact overall structure that occupies little space in the cockpit. By optimizing the motor layout and the design of the reduction mechanism, the volume of the electric armrest adjustment device is significantly reduced, the structure is simplified, and the compatibility with different armrest requirements is improved, thereby meeting the development needs of modern seats for lightweighting, miniaturization, and high integration. Attached Figure Description

[0019] Figure 1 The image shown is a perspective view of this utility model;

[0020] Figure 2 The image shown is a perspective view of this utility model from another angle;

[0021] Figure 3 The image shown is a front view of this utility model;

[0022] Figure 4 The image shown is an exploded view of this utility model;

[0023] Figure 5 The diagram shows the transmission structure between the drive shaft and the output shaft.

[0024] Figure 6 The diagram shows the transmission structure between the output shaft and the armrest.

[0025] Figure 7 An exploded view of the speed reduction mechanism shown.

[0026] Figure 8 The diagram shown is a schematic of the internal structure of the electric handrail actuator.

[0027] Figure 9 The diagram shown illustrates the working principle of this utility model.

[0028] Figure 10 The diagram shown illustrates another working principle of this utility model.

[0029] In the diagram: 10. Electric armrest drive; 11. Drive shaft; 12. Worm gear mechanism; 13. Motor; 20. Seat frame; 30. Reduction mechanism; 31. Housing cover; 32. Output shaft; 33. Torsion spring; 34. Transmission gear set; 35. Torsion spring fixing plate; 36. Housing bottom plate; 37. Limiting block; 38. Bushing; 39. Retaining ring; 40. Armrest. Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0031] In the description of this utility model, it should be understood that the terms "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are 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.

[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0033] 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0034] This utility model discloses a drive mechanism for an automotive seat armrest 40, which is used for adjusting the electric armrest 40 on an automotive seat, changing the angle of the armrest 40 relative to the seat electrically. (See reference) Figures 1-4 This utility model includes an electric armrest drive 10, a seat frame 20 (part of the seat), a reduction mechanism 30, and an armrest 40. The electric armrest drive 10 serves as the drive source for the entire mechanism and includes a drive shaft 11 for outputting rotational motion. (See reference...) Figure 7 The reduction mechanism 30 includes a housing cover plate 31, an output shaft 32, and a torsion spring 33; wherein, the drive shaft 11 passes through the seat frame 20, extending from the inside of the seat frame 20 to the outside of the seat frame 20, and meshes with the output shaft 32 of the reduction mechanism 30 through a transmission gear set 34. Figure 5 More specifically, a driving gear is provided on the drive shaft 11, and a driven gear is provided on the output shaft 32. The driving gear and the driven gear are connected by gears to form a transmission gear set 34. See also Figure 6 The housing cover 31 covers the outside of the transmission gear set 34. The output shaft 32 passes through the housing cover 31, with one end of the output shaft 32 extending out of the housing cover 31 and fixedly connected to the handrail 40 for driving the handrail 40 to rotate synchronously. The torsion spring 33 is sleeved on the outer periphery of the output shaft 32, with both ends of the torsion spring 33 fixed to the housing cover 31 and the output shaft 32, respectively.

[0035] Among them, see Figures 9-10 The rotation axis of the output shaft 32 coincides with the rotation axis of the seat frame 20 when it flips, meaning that the armrest 40 and the seat frame 20 can rotate around the same axis. (See also...) Figures 1-3 The seat frame 20 has an inner cavity on its inner side, which is formed by the various sides of the seat frame 20. The electric armrest drive 10 is fixedly arranged inside the inner cavity of the seat frame 20. The deceleration mechanism 30 is fixedly connected to the outer side of the seat frame 20, and the armrest 40 is placed in the outer direction of the seat frame 20.

[0036] This utility model has two working modes: a storage mode and a working mode. See Figure 9 and Figure 10(1) When in storage mode, the drive shaft 11 of the electric armrest driver 10 outputs rotational motion, which drives the output shaft 32 of the reduction mechanism 30 to rotate through the transmission gear set 34. The torsion spring 33 generates torsion and elastic deformation, providing smooth assistance and stable cushioning. The output shaft 32 drives the armrest 40 to rotate upward relative to the seat frame 20 until the armrest 40 is aligned with the side of the seat, thus realizing the storage of the armrest 40. (2) When in working mode, no matter how the backrest angle of the seat frame 20 is adjusted, the electric armrest driver 10 always outputs torque with the same rotational speed and opposite direction to the backrest adjustment. No matter what angle the seat backrest is adjusted to, the armrest 40 always remains horizontal, ensuring that the passenger's hands can always rest stably and comfortably on it.

[0037] In this utility model, the electric armrest drive 10 is housed inside the cavity of the seat frame 20, and the reduction mechanism 30 is fixed on the outer surface of the seat frame 20. At the same time, the reduction mechanism 30 itself has a small radial dimension and a compact installation structure, and can be tightly connected with the armrest 40. This arrangement has a compact overall structure and occupies little space in the cockpit. By optimizing the layout of the motor 13 and the design of the reduction mechanism 30, the volume of the electric adjustment device of the armrest 40 is significantly reduced, the structure is simplified, and the compatibility with different armrest 40 requirements is improved, thereby meeting the development needs of modern seats for lightweighting, miniaturization, and high integration.

[0038] Preferably, see Figures 6-7 The output shaft 32 has a square shaft section, and correspondingly, the armrest 40 has a square mounting hole. The output shaft 32 is connected to the armrest 40 through the square shaft structure to drive the armrest 40 to rotate, so that the armrest 40 flips relative to the seat.

[0039] Preferably, see Figure 7 The reduction mechanism 30 also includes a torsion spring fixing plate 35, which is fixedly disposed on the outer side of the housing cover plate 31 and has a through hole; a connecting hole is also provided on the output shaft 32; the two ends of the torsion spring 33 are respectively fixed in the through hole of the torsion spring fixing plate 35 and the connecting hole of the output shaft 32, so that when the output shaft 32 rotates, the torsion spring 33 can generate torsional elastic deformation because the torsion spring fixing plate 35 is fixed.

[0040] Preferably, see Figure 7 The reduction mechanism 30 also includes a housing base plate 36, which is fastened to the outer side of the seat frame 20 by bolts. The housing cover plate 31 covers the outer side of the housing base plate 36, thus forming a storage cavity together with the housing base plate 36. The transmission gear set 34, a portion of the drive shaft 11, and a portion of the output shaft 32 are housed in this storage cavity.

[0041] Preferably, see Figure 7 The deceleration mechanism 30 also includes a limiting block 37, which is used to limit the relative movement between the housing cover plate 31 and the housing bottom plate 36. Both the housing cover plate 31 and the housing bottom plate 36 have mounting holes for the limiting block 37. The limiting block 37 is fixedly installed in the housing cover plate 31 and the housing bottom plate 36 to prevent the housing cover plate 31 from flipping or shaking.

[0042] More preferably, see Figures 6-7 The output shaft 32 also has a circular shaft section for mounting the torsion spring 33; the torsion spring 33 is sleeved on the circular shaft section, and the circular shaft section and the torsion spring 33 are located between the armrest 40 and the box cover plate 31.

[0043] Preferably, see Figure 7 The reduction mechanism 30 also includes a bushing 38, which is sleeved on the output shaft 32. The output shaft 32 is sleeved through the output shaft 32 mounting hole of the housing cover plate 31.

[0044] Preferably, see Figure 7 The reduction mechanism 30 also includes a retaining ring 39, which is sleeved on the drive shaft 11. The drive shaft 11 passes through the drive shaft 11 mounting hole in the bottom plate 36 of the housing via the retaining ring 39.

[0045] Preferably, see Figure 8 The electric handrail drive 10 also includes a motor 13 and a worm gear mechanism 12; the motor shaft 13 of the motor 13 is fixedly connected to the worm of the worm gear mechanism 12, and the drive shaft 11 is fixedly connected to the worm wheel of the worm gear mechanism 12. The motor 13 outputs rotational motion, which drives the drive shaft 11 to rotate through the transmission of the worm gear mechanism 12; the drive shaft 11 then drives the output shaft 32 to rotate through the transmission gear set 34, thereby ultimately causing the handrail 40 to rotate.

[0046] This utility model also discloses a car seat, which includes the aforementioned drive mechanism for the car seat armrest 40. Any car seat that uses the same or substantially the same drive mechanism should be within the protection scope of this utility model.

[0047] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A drive mechanism for an automobile seat armrest, characterized in that, include: An electric handrail actuator includes a drive shaft for outputting rotary motion; Seat frame; The reduction mechanism includes: a housing cover, an output shaft, and a torsion spring; The drive shaft passes through the seat frame and is meshed with the output shaft through a transmission gear set; the housing cover covers the outside of the transmission gear set, and the output shaft passes through the housing cover; the torsion spring is sleeved on the output shaft, and its two ends are respectively fixed to the housing cover and the output shaft; An armrest, one end of which is fixedly connected to the output shaft; The rotation axis of the output shaft coincides with the tilting rotation axis of the seat frame; The seat frame has an inner cavity on its inner side, the electric armrest driver is fixed to the inner cavity of the seat frame, the deceleration mechanism is fixed to the outer side of the seat frame, and the armrest is positioned on the outer side of the seat frame.

2. The drive mechanism for an automobile seat armrest as described in claim 1, characterized in that, The output shaft has a square shaft segment, and the handrail is correspondingly provided with a square mounting connection hole, so that the output shaft drives the handrail to rotate through the square shaft segment.

3. The drive mechanism for an automobile seat armrest as described in claim 1, characterized in that, The deceleration mechanism further includes: a torsion spring fixing plate; the torsion spring fixing plate is disposed on the outer side of the housing cover plate, and a through hole is formed on the torsion spring fixing plate; a connecting hole is formed on the output shaft; the two ends of the torsion spring are respectively fixed in the through hole of the torsion spring fixing plate and the connecting hole of the output shaft.

4. The drive mechanism for an automobile seat armrest as described in claim 1, characterized in that, The deceleration mechanism further includes: a housing bottom plate; the housing bottom plate is fastened to the outer side of the seat frame; the housing cover plate is closed on the housing bottom plate to form a storage cavity together with the housing bottom plate; the transmission gear set is rotatably disposed in the storage cavity.

5. The drive mechanism for an automobile seat armrest as described in claim 4, characterized in that, The deceleration mechanism further includes a limiting block; both the housing cover plate and the housing bottom plate have limiting block mounting holes, and the limiting block is fixedly installed in both the housing cover plate and the housing bottom plate to limit the housing cover plate.

6. The drive mechanism for an automobile seat armrest as described in claim 2, characterized in that, The output shaft has a circular shaft section, the torsion spring is sleeved on the circular shaft section, and the circular shaft section is located between the armrest and the box cover plate.

7. The drive mechanism for an automobile seat armrest as described in claim 1, characterized in that, The deceleration mechanism further includes a bushing; the bushing is sleeved on the output shaft, and the output shaft passes through the bushing into the output shaft mounting hole of the housing cover plate.

8. The drive mechanism for an automobile seat armrest as described in claim 4, characterized in that, The deceleration mechanism further includes a retaining ring; the retaining ring is sleeved on the drive shaft, and the drive shaft passes through the drive shaft mounting hole in the bottom plate of the housing via the retaining ring.

9. The drive mechanism for an automobile seat armrest as described in claim 1, characterized in that, The electric handrail drive also includes: a motor and a worm gear mechanism; the motor shaft of the motor is fixedly connected to the worm of the worm gear mechanism, and the drive shaft is fixedly connected to the worm wheel of the worm gear mechanism.

10. A car seat, characterized in that, Includes the drive mechanism for automobile seat armrests as described in any one of claims 1 to 9.

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