Automobile seat armrest angle adjusting mechanism and automobile seat armrest

Abstract

The application discloses a kind of automobile seat armrest angle adjusting mechanism and automobile seat armrest, automobile seat armrest angle adjusting mechanism includes: fixed shaft, fixed shaft is used to be fixedly connected with the inner support of automobile seat, to provide fixed reference point;Shell body, shell body is connected with fixed shaft, and can rotate around the axis of fixed shaft;Ratchet wheel, ratchet wheel is connected with shell body, and can rotate with shell body synchronously;Pawl base, one side of pawl base is attached to the inner wall of ratchet wheel, and the center of pawl base is fixedly connected with fixed shaft;Pawl, pawl is movably assembled on pawl base, and pawl is engaged with ratchet wheel to realize the locking of shell body;Unlocking assembly, one end of unlocking assembly is movably assembled on shell body, and the other end is used to abut against pawl to control the engagement or disengagement of pawl and ratchet wheel;Wherein, shell body drives ratchet wheel to rotate, to adjust the engagement position of pawl relative to ratchet wheel, to realize the angle adjustment of automobile seat armrest.

Description

Technical Field

[0001] This application relates to the field of automotive parts technology, and more specifically to an automotive seat armrest angle adjustment mechanism and an automotive seat armrest. Background Technology

[0002] Currently, car seat armrests are one of the core components for improving the comfort of drivers and passengers. Their angle adjustment function can be flexibly adapted to different users' sitting posture habits and usage scenarios. Therefore, the performance of the angle adjustment mechanism directly affects the user experience. At present, the mainstream car seat armrest angle adjustment mechanism mainly achieves angle switching through the cooperation of locking components and adjustment components to meet the needs of stable stopping and flexible adjustment of the armrest in different positions.

[0003] Among the related technologies, the adjustment mechanism adopts a friction locking method, which locks the armrest by means of friction between the friction plate and the mating part. However, the locking stability of this type of structure is poor. During vehicle operation, if encountering bumps, rapid acceleration or deceleration, the friction plate is prone to relative slippage due to vibration, causing the armrest to shift at an angle and fail to remain stably in the preset position. Alternatively, the armrest angle can be adjusted only by the cooperation of ratchet and pawl, but the meshing stability of the two is poor, resulting in a poor user experience. Utility Model Content

[0004] The purpose of this application is to provide an automotive seat armrest angle adjustment mechanism and an automotive seat armrest, so as to improve the stability of the armrest adjustment process and the armrest during use.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows: A car seat armrest angle adjustment mechanism is provided, comprising: a fixed shaft, which is fixedly connected to the inner support of the car seat to provide a fixed reference; a housing body, which is connected to the fixed shaft and can rotate around the axis of the fixed shaft; a ratchet, which is connected to the housing body and can rotate synchronously with the housing body; a pawl base, which is fitted to the ratchet and fixedly connected to the fixed shaft; a pawl, which is movably mounted on the pawl base and engages with the ratchet to lock the housing body; and an unlocking component, one end of which is movably mounted on the housing body, and the other end of which abuts against the pawl to control the engagement or disengagement of the pawl with the ratchet; wherein, the housing body drives the ratchet to rotate, thereby adjusting the engagement position of the pawl relative to the ratchet, thus achieving angle adjustment of the car seat armrest.

[0006] As a preferred embodiment, the ratchet has a toothed structure at a local location on its inner wall, the pawl engages with the toothed structure, and the circumferential distribution range of the toothed structure along the inner wall of the ratchet matches the adjustment range of the car seat armrest.

[0007] As another preferred embodiment, the shell body further includes a base plate connected to the unlocking assembly, the unlocking assembly swinging within the inner wall range of the ratchet by rotating the base plate.

[0008] Further preferably, the unlocking component includes an unlocking block and an elastic element. One end of the elastic element is connected to the unlocking block, and the other end is used to connect to the base plate, so that the elastic element can press the unlocking block against the pawl through its elastic force, so that the pawl is engaged with the ratchet.

[0009] Further preferably, the pawl is provided with a protruding pin, and the unlocking block is provided with an arc-shaped abutment portion that cooperates with the protruding pin; wherein, when the housing body rotates and is within the angle adjustment range of the car seat armrest, the arc-shaped abutment portion always abuts against the protruding pin, so that the pawl always remains engaged with the ratchet.

[0010] Preferably, the unlocking block has a guide groove that extends radially through the unlocking block; the car seat armrest includes a first position, a second position, and a third position; wherein, when the car seat armrest is in the first position, the convex pin separates from the arc-shaped abutment portion; when the car seat armrest rotates to the second position, the convex pin enters through the opening of the guide groove; when the car seat armrest rotates between the second position and the third position, the convex pin remains within the guide groove.

[0011] Preferably, the inlet position of the guide groove is provided with a first guide portion.

[0012] Preferably, the outlet position of the guide groove is provided with a second guide portion, which guides the arc-shaped abutment portion; the car seat armrest also includes a fourth position, when the car seat armrest is in the fourth position, the convex pin abuts against the second guide portion, and rotating the car seat armrest can drive the convex pin from the second guide portion into the arc-shaped abutment portion.

[0013] In a further preferred embodiment, the ratchet is also provided with a limiting surface, so that when the tail end of the pawl abuts against the limiting surface, the car seat armrest is in the fifth position.

[0014] Furthermore, this application also provides an automotive seat armrest, comprising: an armrest body, and an automotive seat armrest angle adjustment mechanism as described in any of the above, wherein the armrest body is connected to the automotive seat armrest angle adjustment mechanism to adjust the opening and closing angle of the armrest body through the automotive seat armrest angle adjustment mechanism.

[0015] Compared with the prior art, the beneficial effects of this application are as follows: This application document establishes a direct control structure for the engagement or disengagement of the pawl and ratchet through the setting of the unlocking component. Compared with the complex transmission-type unlocking structure in traditional adjustment mechanisms, the unlocking component of this embodiment does not require additional intermediate transmission parts, which not only simplifies the overall structure of the mechanism, but also avoids unlocking delays or jamming caused by transmission gaps, improves the smoothness of angle adjustment, and ensures the accuracy of armrest angle adjustment. Moreover, the connection relationship of each component is clear, the assembly difficulty is low, and it is suitable for industrial mass production. In addition, the engagement and locking method of the pawl and ratchet has stronger locking stability than friction locking, which can effectively prevent the angle deviation of the armrest caused by vibration during use and improve the user experience. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the car seat armrest angle adjustment mechanism.

[0017] Figure 2 This is an exploded structural diagram of the car seat armrest angle adjustment mechanism.

[0018] Figure 3 This is a cross-sectional view of the car seat armrest angle adjustment mechanism.

[0019] Figure 4 This is a schematic diagram of the car seat armrest angle adjustment mechanism when the car seat armrest is in a horizontal position.

[0020] Figure 5 This is a schematic diagram of the car seat armrest angle adjustment mechanism when the car seat armrest is in the first position.

[0021] Figure 6 This is a schematic diagram of the car seat armrest angle adjustment mechanism when the car seat armrest is in the second position.

[0022] Figure 7 This is a schematic diagram of the car seat armrest angle adjustment mechanism when the car seat armrest is in the third position.

[0023] Figure 8 This is a schematic diagram of the car seat armrest angle adjustment mechanism when the car seat armrest is in the fourth position.

[0024] Figure 9This is a schematic diagram of the structure in the car seat armrest angle adjustment mechanism where a convex pin abuts against an arc-shaped contact part.

[0025] Figure 10 This is a schematic diagram of the car seat armrest angle adjustment mechanism when the car seat armrest is in the fifth position.

[0026] Figure 11 This is a structural diagram of the unlocking component.

[0027] In the diagram: 1. Car seat armrest angle adjustment mechanism; 10. Fixed shaft; 20. Housing body; 21. Base plate; 22. Metal cover plate; 23. Rotating housing; 24. Metal frame; 30. Ratchet; 31. Toothed structure; 32. Limiting surface; 40. Pawl base; 50. Pawl; 51. Protruding pin; 52. Positioning post; 60. Unlocking component; 61. Unlocking block; 611. Arc-shaped abutment part; 612. Guide groove; 613. First guide part; 614. Second guide part; 62. Elastic element; 70. Steel wire circlip; 80. Fastening bolt. Detailed Implementation

[0028] The present application will be further described below with reference to 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.

[0029] In the description of this application, it should be noted that the directional terms such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application 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. They should not be construed as limiting the specific protection scope of this application.

[0030] It should be noted that the terms "first," "second," etc., in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0031] The terms “comprising” and “having”, and any variations thereof, in the specification and claims of this application are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or device.

[0032] In a preferred embodiment, see Figures 1 to 11 This application provides an automotive seat armrest angle adjustment mechanism 1, comprising: a fixed shaft 10, which is fixedly connected to the inner support of the automotive seat to provide a fixed reference; a housing body 20, which is connected to the fixed shaft 10 and can rotate around the axis of the fixed shaft 10; a ratchet 30, which has an annular structure, is connected to the housing body 20, and can rotate synchronously with the housing body 20; and a pawl base 40, which has a plate-like structure, one side of which is fitted against the inner wall of the ratchet 30, and the center of the pawl base 40 is fixedly connected to the fixed shaft 10. The system utilizes a spline connection or interference fit; a pawl 50 is movably mounted on a pawl base 40 via a positioning pin 52, with meshing teeth at the head end of the pawl 50, allowing it to engage with a ratchet 30 to lock the housing body 20; an unlocking component 60 is movably mounted on the housing body 20 at one end, and the other end abuts against the pawl 50 to control the engagement or disengagement of the pawl 50 with the ratchet 30; wherein, the housing body 20 drives the ratchet 30 to rotate, thereby adjusting the engagement position of the pawl 50 relative to the ratchet 30, thus achieving angle adjustment of the car seat armrest.

[0033] Specifically, the shell body 20 includes a metal cover plate 22, a rotating shell 23 and a metal frame 24 distributed along the axial direction. The rotating shell 23, the metal frame 24 and the ratchet 30 are fixedly connected by three circumferentially distributed fastening bolts 80. A steel wire retaining ring 70 is also provided between the ratchet base 40 and the rotating shell 23 to prevent the fixed shaft 10 from exiting the shell body 20 for fixing.

[0034] When the angle of the car seat armrest needs to be adjusted, an external force is applied to the armrest to rotate the housing body 20 around the fixed axis 10. The housing body 20 simultaneously drives the ratchet 30 to rotate. At this time, if the angle adjustment needs to be unlocked, the unlocking component 60 can be indirectly driven to move by the rotation of the armrest. For example, when the armrest rotates, the housing body 20 drives the unlocking component 60 to swing within a certain range, so that the resistance force of the unlocking component 60 against the pawl 50 changes during the movement. When the resistance force of the unlocking component 60 against the pawl 50 weakens or disappears, the pawl 50 can rotate around the positioning post 52 of the pawl base 40 along the axis, so that the pawl 50 disengages from the meshing teeth of the ratchet 30, that is, the locking state is released. Then, the armrest is continuously rotated to the target angle. At this time, the external force is released, the unlocking component 60 is reset, and the unlocking component 60 abuts against the pawl 50 again, so that the meshing teeth of the pawl 50 engage with the inner wall teeth of the ratchet 30 again, thereby locking the housing body 20 and fixing the armrest at the target angle, completing one angle adjustment.

[0035] Therefore, the unlocking component 60 forms a direct control structure for the engagement or disengagement of the pawl 50 and the ratchet 30. Compared with the complex transmission unlocking structure in traditional adjustment mechanisms, the unlocking component 60 in this embodiment does not require additional intermediate transmission components. This not only simplifies the overall structure of the mechanism but also avoids unlocking delays or jamming caused by transmission gaps, improving the smoothness of angle adjustment. At the same time, it ensures the accuracy of the armrest angle adjustment. Furthermore, the connection relationship between each component is clear, the assembly difficulty is low, and it is suitable for industrial mass production. In addition, the engagement and locking method of the pawl 50 and the ratchet 30 has stronger locking stability than friction locking, which can effectively prevent the angle deviation of the armrest caused by vibration during use and improve the user experience.

[0036] As a preferred embodiment, the inner wall of the ratchet 30 is provided with a toothed structure 31 at a local location. The pawl 50 engages with the toothed structure 31. The circumferential distribution range of the toothed structure 31 along the inner wall of the ratchet 30 matches the adjustment range of the car seat armrest. By limiting the locking and unlocking boundaries, overtravel rotation during the angle adjustment of the car seat armrest in this application is avoided, effectively preventing damage.

[0037] As another preferred option, see Figure 2 The housing body 20 also includes a base plate 21, which is connected to the unlocking component 60. The unlocking component 60 swings within the inner wall of the ratchet 30 by rotating the base plate 21. That is, the unlocking component 60 is positioned inside the housing body 20 so that it does not directly contact the ratchet 30 or the pawl base 40, thus avoiding mutual interference and ensuring the locking and unlocking effect of the unlocking component 60 on the pawl 50.

[0038] For further optimization, see [link to relevant documentation]. Figure 2 The unlocking component 60 includes an unlocking block 61 and an elastic element 62. One end of the elastic element 62 is connected to the unlocking block 61, and the other end is used to connect to the base plate 21, so that the elastic element 62 can press the unlocking block 61 against the pawl 50 through its elastic force, so that the pawl 50 is engaged with the ratchet 30.

[0039] Correspondingly, the pawl 50 is provided with a protruding pin 51, and the unlocking block 61 is provided with an arc-shaped abutment part 611 that cooperates with the protruding pin 51; wherein, when the housing body 20 rotates and is within the angle adjustment range of the car seat armrest, the arc-shaped abutment part 611 always abuts against the protruding pin 51 so that the pawl 50 always remains engaged with the ratchet 30.

[0040] The elastic element 62 is preferably a torsion spring, but a compression spring can also be used depending on the assembly space. One end of the elastic element 62 is fixedly connected to the side wall of the unlocking block 61 by a snap-fit, and the other end is used to snap into the groove of the base plate 21. The elastic element 62 is always in a state of slight deformation in its natural state. It applies continuous pressure to the unlocking block 61 through its own elastic restoring force. This pressure directly drives the unlocking block 61 to press towards the pawl 50. Within the adjustment range, the arc-shaped abutment part 611 is always kept in abutting state against the convex pin 51. Thus, through the abutting force of the unlocking block 61, the pawl 50 and the local internal tooth structure of the ratchet 30 are stably engaged, avoiding disengagement of the engagement without human operation.

[0041] See Figure 5 The unlocking block 61 has a guide groove 612 that extends radially through the unlocking block 61. The car seat armrest includes a first position, a second position, and a third position. When the car seat armrest is in the first position, the protruding pin 51 separates from the arc-shaped abutment part 611. When the car seat armrest rotates to the second position, the protruding pin 51 enters through the opening of the guide groove 612. When the car seat armrest rotates between the second and third positions, the protruding pin 51 remains within the guide groove 612.

[0042] See Figure 11 The guide groove 612 has a first guide part 613 at the inlet and a second guide part 614 at the outlet. The first guide part 613 is shaped like a horn, and the second guide part 614 is formed by an upward protrusion in the unlocking block 61 that faces the guide groove 612 from the outlet. Both the first guide part 613 and the second guide part 614 provide a guiding effect for the convex pin 51, and the second guide part 614 guides the arc-shaped abutment part 611. The car seat armrest also includes a fourth position. When the car seat armrest is in the fourth position, the convex pin 51 abuts against the second guide part 614, and rotating the car seat armrest can drive the convex pin 51 from the second guide part 614 into the arc-shaped abutment part 611.

[0043] Therefore, preferably, as illustrated by a specific embodiment, the car seat armrest angle adjustment mechanism 1 in this application can realize multi-position locking and angle adjustment cycles of the armrest. Specifically, when the rotating component drives the armrest to rotate within a preset locking angle range, the pawl 50 and the ratchet 30 remain engaged, realizing multi-position locking of the armrest. The preset locking angle range of the car seat armrest angle adjustment mechanism 1 in this application is from 0-20 degrees upward to 0-12 degrees downward in a horizontal state. See [reference needed]. Figure 4 , Figure 4The diagram shows the structure of the car seat armrest adjustment mechanism when the armrest is in a horizontal position. At this position, the angle interval between adjacent locking positions is 4 degrees. Starting with 0 degrees in the horizontal position as the first position, there are 5 upward positions and 3 downward positions, resulting in a total of 9 locking positions. Figure 4 The downward adjustment angle at point a is 12 degrees, and the upward adjustment angle at point b is 20 degrees, for a total swing adjustment range of 32 degrees.

[0044] When the car seat armrest angle adjustment mechanism 1 continuously adjusts the lifting angle, since the lifting angle adjustment range of the pawl 50 and ratchet 30 is 0 to 20 degrees, when the adjustment angle is greater than 20 degrees, the unlocking block 61 loses its locking function; continuing the lifting operation, when the armrest is rotated upwards beyond the upper limit of the preset locking angle range by the structure of the fixed shaft 10, housing body 20 and ratchet 30 to an lifting angle of 36 degrees, as... Figure 5 As shown, at this time, the arc-shaped abutment part 611 of the unlocking block 61 in the unlocking component 60 is completely disengaged from the convex pin 51 in the pawl 50 to release the pawl 50 and disengage the pawl 50 from the ratchet 30. At this time, the upper limit position of the car seat armrest is the corresponding first position mentioned above.

[0045] See Figure 6 ,by Figure 5 Using the angle shown as a reference, when the ratchet 30 rotates to 26 degrees above the horizontal position of the car seat armrest, the protruding pin 51 on the pawl 50 enters the guide groove 612 on the unlocking block 61 along the first guide portion 613. At this time, the car seat armrest is in the second position. Figure 6 As shown; simultaneously, when the ratchet 30 is continuously pressed down and rotated to 26 degrees below the horizontal position of the car seat armrest, as... Figure 7 As shown, at this time, the convex pin 51 disengages from the guide groove 612 along the opening position of the guide groove 612, and the car seat armrest is in the third position. When the car seat armrest is between the second and third positions, that is, when the convex pin 51 is in the guide groove 612, the car seat armrest angle adjustment mechanism 1 is in a continuously unlocked state. The unlocking block 61 does not provide a downward locking force to the pawl 50 at this time. The unlocking block 61 loses its locking function, and the pawl 50 and the ratchet 30 disengage from each other and do not engage.

[0046] When the car seat armrest is lifted and rotated again, the convex pin 51 disengages from the guide groove 612 and enters the second guide section 614, as... Figure 8 As shown; at this time, the upward force on the car seat armrest continues to be applied, that is, the car seat armrest is 10 degrees below the horizontal position. At this time, the ratchet 30 is pressed down, so that the pawl 50 re-engages with the ratchet 30. The convex pin 51 abuts against the arc-shaped abutment part 611 along the second guide part 614. The pawl 50 enters the initial locking position relative to the ratchet 30, as shown. Figure 9 As shown, the top tooth of the pawl 50 meshes with the top tooth of the toothed structure 31 inside the ratchet 30, thereby completing one cycle of angle adjustment action of the car seat armrest angle adjustment mechanism 1.

[0047] For further optimization, see [link to relevant documentation]. Figure 10 The ratchet 30 is also provided with a limiting surface 32. When the tail end of the pawl 50 abuts against the limiting surface 32, the car seat armrest is in the fifth position. Specifically, after the car seat armrest is raised to the first position with an upward angle of 36 degrees, it can continue to rotate upward to the fifth position with an upward angle of 85 degrees. When the car seat armrest is at an upward angle of 85 degrees, it is in the fifth position.

[0048] Furthermore, this application also provides an automotive seat armrest, including: an armrest body, and an automotive seat armrest angle adjustment mechanism 1 as described above, wherein the armrest body is connected to the automotive seat armrest angle adjustment mechanism 1 to adjust the opening and closing angle of the armrest body through the automotive seat armrest angle adjustment mechanism 1.

[0049] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this application. Various changes and modifications can be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection claimed by this application is defined by the appended claims and their equivalents.

Claims

1. A car seat armrest angle adjustment mechanism, characterized in that, include: A fixed shaft is used to fix the car seat inner bracket to provide a fixed reference. A shell body, which is connected to the fixed shaft and can rotate about the axis of the fixed shaft; A ratchet, which is connected to the housing body and can rotate synchronously with the housing body; A pawl base is provided to fit against the ratchet, and the pawl base is fixedly connected to the fixed shaft; A pawl, which is movably mounted on a pawl base, engages with a ratchet to lock the housing body; An unlocking component, one end of which is movably mounted on the housing body, and the other end of which is used to abut against the pawl to control the engagement or disengagement of the pawl with the ratchet; The housing body drives the ratchet to rotate, thereby adjusting the engagement position of the pawl relative to the ratchet and thus achieving angle adjustment of the car seat armrest.

2. The car seat armrest angle adjustment mechanism as described in claim 1, characterized in that, The ratchet has a toothed structure on a partial location on its inner wall. The pawl engages with the toothed structure, and the circumferential distribution of the toothed structure along the inner wall of the ratchet matches the adjustment range of the car seat armrest.

3. The car seat armrest angle adjustment mechanism as described in claim 1, characterized in that, The shell body also includes a base plate, which is connected to the unlocking assembly. The unlocking assembly swings within the inner wall range of the ratchet by rotating the base plate.

4. The car seat armrest angle adjustment mechanism as described in claim 3, characterized in that, The unlocking component includes an unlocking block and an elastic element. One end of the elastic element is connected to the unlocking block, and the other end is used to connect to the base plate, so that the elastic element can press the unlocking block against the pawl through its elastic force, so that the pawl is engaged with the ratchet.

5. The car seat armrest angle adjustment mechanism as described in claim 4, characterized in that, The pawl is provided with a protruding pin, and the unlocking block is provided with an arc-shaped abutment portion that cooperates with the protruding pin; When the housing body rotates and is within the angle adjustment range of the car seat armrest, the arc-shaped abutment part always abuts against the convex pin so that the pawl always remains engaged with the ratchet.

6. The automobile seat armrest angle adjustment mechanism as described in claim 5, characterized in that, The unlocking block is provided with a guide groove that extends radially through the unlocking block; the car seat armrest includes a first position, a second position, and a third position. Specifically, when the car seat armrest is in the first position, the convex pin separates from the arc-shaped abutment portion; when the car seat armrest rotates to the second position, the convex pin enters through the opening of the guide groove; when the car seat armrest rotates between the second position and the third position, the convex pin remains within the guide groove.

7. The automobile seat armrest angle adjustment mechanism as described in claim 6, characterized in that, The inlet of the guide groove is provided with a first guide section.

8. The automobile seat armrest angle adjustment mechanism as described in claim 6, characterized in that, The outlet of the guide groove is provided with a second guide portion, which guides the arc-shaped abutment portion; the car seat armrest also includes a fourth position, when the car seat armrest is in the fourth position, the convex pin abuts against the second guide portion, and rotating the car seat armrest can drive the convex pin from the second guide portion into the arc-shaped abutment portion.

9. The automobile seat armrest angle adjustment mechanism as described in claim 6, characterized in that, The ratchet is also provided with a limiting surface. When the tail end of the pawl abuts against the limiting surface, the car seat armrest is in the fifth position.

10. A car seat armrest, characterized in that, include: The armrest body and the car seat armrest angle adjustment mechanism as described in any one of claims 1-9, wherein the armrest body is connected to the car seat armrest angle adjustment mechanism so as to adjust the opening and closing angle of the armrest body through the car seat armrest angle adjustment mechanism.

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