Automobile seat and massage movement thereof

Abstract

The application provides an automobile seat and a massage movement core thereof. The massage movement core comprises a fixed seat, a movable seat, a driving shaft, a massage arm and a connecting rod. The massage arm is connected with the movable seat through the connecting rod and can rotate around the driving shaft. A collapse mechanism is arranged between the movable seat and the fixed seat. The collapse mechanism comprises a transmission screw rod connected with the fixed seat, a transmission nut matched with the transmission screw rod and a nut locking device arranged on the movable seat. The nut locking device comprises a pair of locking hooks and a locking spring. The locking hooks are engaged with the transmission nut to lock the transmission nut. The locking spring is connected between the pair of locking hooks. When the abuse force of the automobile exceeds a preset threshold, the engagement force between the locking hooks and the transmission nut generates a component torque capable of driving the locking hooks to rotate. The component torque drives the pair of locking hooks to the open position and releases the transmission nut to release the rotation restriction on the massage arm. The reliability of the daily massage function is ensured, and the crash safety is significantly improved.

Description

Technical Field

[0001] This invention relates to the field of massage equipment technology, specifically to a car seat and its massage mechanism. Background Technology

[0002] With the development of the automotive industry, people's demands for ride comfort are increasing. Seats with built-in massage functions have become a common feature in mid-to-high-end models. These seats use motors to drive massage arms to simulate the kneading and tapping motions of human hands. The massage arms need to apply a certain amount of force to the back of the human body to achieve a massage effect. Therefore, the massage arms and the drive mechanism that drives the massage arms must have sufficient strength and rigidity.

[0003] However, in the event of an accidental impact such as a car collision, when occupants are forced to sit against the seat back due to inertia, the hard, protruding massage arm may become a "secondary source of injury," causing concentrated impact on the spine and back, posing a safety hazard.

[0004] To address this issue, the industry has explored various approaches. For example, one approach involves reducing the overall strength of the massage mechanism, allowing it to break or deform under impact to absorb energy. However, this method is unreliable and may fail prematurely due to fatigue or other unforeseen circumstances, affecting the normal operation of the massage function.

[0005] Therefore, it is necessary to propose a new technical solution to overcome the shortcomings of existing technologies. Summary of the Invention

[0006] To address the aforementioned issues, this invention provides a car seat and its massage mechanism. When the car is subjected to a collision or other abusive forces exceeding a preset threshold, the locking hook automatically opens and releases the transmission nut under the drive of a component torque, thereby removing the restriction on the rotation of the massage arm and allowing the massage arm to quickly retract to a safe position, preventing the hard, protruding massage arm from causing secondary impact injuries to the occupant's back.

[0007] This invention provides a massage mechanism for car seats, including a fixed seat, a movable seat, a drive shaft, a massage arm, and a connecting rod. The massage arm is connected to the movable seat via the connecting rod and can rotate around the drive shaft. A collapsing mechanism is provided between the movable seat and the fixed seat. The collapsing mechanism is used to release the rotation restriction on the massage arm so that the massage arm collapses to a safe position when the abuse force on the car exceeds a preset threshold. The collapsible mechanism includes a transmission screw connected to a fixed seat, a transmission nut cooperating with the transmission screw, and a nut locking device provided on a movable seat. The nut locking device includes a pair of locking hooks and a locking spring. One end of the locking hook is pivotally connected to the movable seat, and the other end engages with the transmission nut to lock the transmission nut. The locking spring is connected between the pair of locking hooks and is used to apply a locking force to the locking hooks. When the abuse force on the car exceeds a preset threshold, the engagement force between the locking hook and the transmission nut generates a component torque that can drive the locking hook to rotate. The component torque drives a pair of locking hooks to the open position and releases the transmission nut to remove the restriction on the rotation of the massage arm.

[0008] Several alternative methods are provided below, but they are not intended as additional limitations on the overall solution above. They are merely further additions or optimizations. Provided there are no technical or logical contradictions, each alternative method can be combined individually with respect to the overall solution above, or multiple alternative methods can be combined with each other.

[0009] Optionally, the engaging force between the locking hook and the transmission nut has a component torque in a horizontal plane perpendicular to the axis of the transmission screw; When the abuse force exceeds a preset threshold, the component torque increases and drives a pair of locking hooks to open.

[0010] Optionally, the locking hook includes a hook portion that abuts against one side of the transmission nut along the axial direction of the transmission screw, so that the hook portion engages with the transmission nut.

[0011] Optionally, the hook portion has a first locking surface that abuts against the transmission nut, the first locking surface being inclined or perpendicular to the axial direction of the transmission screw; and / or The transmission nut has a second locking surface that abuts against the hook portion, and the second locking surface is inclined or perpendicular to the axial direction of the transmission screw.

[0012] Optionally, at least a portion of the transmission nut is located between the two hooks of a pair of locking hooks; When the abuse force exceeds a preset threshold, the transmission nut drives the two hooks of a pair of locking hooks to move in opposite directions, so that the pair of locking hooks open.

[0013] Optionally, the locking hook has a first end pivotally mounted on the movable seat and a second end engaging with the transmission nut, the first end and the second end of the locking hook being spaced apart along the axial direction of the transmission screw; The locking spring is connected to the second end of the locking hook.

[0014] Optionally, an anti-rotation structure is provided between the locking hook and the transmission nut, the anti-rotation structure being configured to restrict the transmission nut from rotating with the transmission screw.

[0015] Optionally, the anti-rotation structure includes an anti-rotation groove disposed on the transmission nut, and a portion of the locking hook is located within the anti-rotation groove.

[0016] Optionally, a guide structure is provided between the movable seat and the fixed seat, the guide structure being configured to guide the movement path of the movable seat.

[0017] Optionally, the transmission nut has a guide surface; When the massage arm switches from the safe position to the massage position, the transmission nut moves axially along the transmission screw, and the guide surface is used to guide the locking hook to re-engage with the transmission nut.

[0018] The present invention also provides an automobile seat, including a seat frame and a massage mechanism; the massage mechanism is configured as described in any of the above claims.

[0019] This invention discloses a car seat and its massage mechanism. When the abuse force on the car exceeds a preset threshold, the component torque generated by the engagement force between the locking hook and the transmission nut in the horizontal plane perpendicular to the axis of the transmission screw increases. This increased component torque overcomes the locking force of the locking spring and drives a pair of locking hooks to open outward around their pivot point. The locking hooks that were originally engaged with the transmission nut disengage from the transmission nut, and the transmission nut loses its locking constraint. At this time, the transmission connection between the movable seat and the fixed seat is released, and the structure connecting the massage arm to the movable seat through the connecting rod loses its rotation restriction. The massage arm rotates and collapses around the drive shaft to a preset safe position, completing the transition from the normal working state to the safe collapse state.

[0020] During normal massage, the locking hook and the drive nut engage stably to lock the drive nut, ensuring effective massage from the massage arm. When the force of a collision or other abusive forces exceeds a preset threshold, the locking hook automatically opens and releases the drive nut under the drive of a component torque, releasing the rotation restriction on the massage arm and allowing it to quickly collapse to a safe position. This prevents the hard, protruding massage arm from causing secondary impact injuries to the occupant's back, significantly improving collision safety while ensuring the reliability of daily massage functions. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below. Obviously, the drawings described below only relate to some embodiments of the present invention and are not intended to limit the present invention.

[0022] Figure 1 A schematic diagram of the massage mechanism in one embodiment of the present invention; Figure 2 for Figure 1 A schematic diagram of the massage mechanism in a collapsed state; Figure 3 for Figure 1 A structural schematic diagram of the massage mechanism from another perspective; Figure 4 for Figure 1A schematic diagram of the massage mechanism with some parts omitted; Figure 5 for Figure 4 A schematic diagram of the structure of the massage mechanism with some parts of the fixing base omitted; Figure 6 for Figure 4 A schematic diagram of the massage mechanism with some parts of the movable seat omitted; Figure 7 for Figure 6 A partial structural diagram of the central collapse mechanism; Figure 8 for Figure 7 Cross-sectional view of the central collapse mechanism; Figure 9 for Figure 6 A cross-sectional view of the collapsible mechanism in a collapsed state; Figure 10 for Figure 7 A cross-sectional view of another embodiment of the collapse mechanism.

[0023] Explanation of reference numerals in the attached figures: 100. Massage mechanism; 10. Fixture; 20. Movable seat; 21. Guide structure; 22. Guide rod; 30. Drive shaft; 32. First motor; 33. Worm gear structure; 331. First worm; 332. First worm wheel; 333. Second worm; 334. Second worm wheel; 40. Massage arm; 41. Arm; 42. Massage head; 50. Connecting rod; 60. Collapsible mechanism; 61. Transmission screw; 62. Transmission nut; 621. Guide surface; 63. Nut locking device; 631. Locking hook; 6311. Hook part; 6312. First locking surface; 632. Locking spring; 64. Second motor; 65. Anti-rotation structure; 651. Anti-rotation groove. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0025] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0026] Unless otherwise defined, the technical or scientific terms used in this patent document shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this patent specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms "an," "a," or "the" do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including" indicate that the element or object preceding "comprising" encompasses the element or object listed following "comprising" or its equivalents, and do not exclude other elements or objects. Terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" are used only to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly. These terms are only for the convenience of describing the invention and for 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, and therefore should not be construed as a limitation of the invention.

[0027] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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 invention based on the specific circumstances.

[0028] like Figures 1 to 8As shown, this application provides a massage mechanism 100 for car seats, including a fixed base 10, a movable base 20, a drive shaft 30, a massage arm 40, and a connecting rod 50. The massage arm 40 is connected to the movable base 20 via the connecting rod 50 and can rotate around the drive shaft 30. A collapse mechanism 60 is provided between the movable base 20 and the fixed base 10. The collapse mechanism 60 is used to release the rotation restriction on the massage arm 40 when the abuse force on the car exceeds a preset threshold, so that the massage arm 40 collapses to a safe position. The collapse mechanism 60 includes a transmission screw 61 connected to the fixed base 10 and a mechanism that cooperates with the transmission screw 61. The transmission nut 62 and the nut locking device 63 provided on the movable seat 20, the nut locking device 63 includes a pair of locking hooks 631 and a locking spring 632; one end of the locking hook 631 is pivotally connected to the movable seat 20, and the other end engages with the transmission nut 62 to lock the transmission nut 62; the locking spring 632 is connected between the pair of locking hooks 631 and is used to apply a locking force to the locking hooks 631; wherein, when the abuse force on the vehicle exceeds a preset threshold, the engaging force between the locking hooks 631 and the transmission nut 62 generates a component torque that can drive the locking hooks 631 to rotate (e.g., Figure 8 as well as Figure 9 (in the x direction), the component torque drives a pair of locking hooks 631 to the open position and releases the transmission nut 62 to release the rotation restriction on the massage arm.

[0029] When the abuse force on the car exceeds the preset threshold, the component torque generated by the engagement force between the locking hook 631 and the transmission nut 62 increases. This increased component torque overcomes the locking force of the locking spring 632, driving a pair of locking hooks 631 to open outward around their pivot point. The locking hooks 631 that were originally engaged with the transmission nut 62 disengage from the transmission nut 62, and the transmission nut 62 loses its locking constraint. At this time, the transmission connection between the movable seat 20 and the fixed seat 10 is released, and the structure connecting the massage arm 40 to the movable seat 20 through the connecting rod 50 loses its rotation restriction. The massage arm 40 rotates and collapses around the drive shaft 30 to the preset safe position, completing the transition from the normal working state to the safe collapse state.

[0030] During normal massage, the locking hook 631 and the transmission nut 62 engage to stably lock the transmission nut 62, ensuring that the massage arm 40 provides effective massage. When the force of a collision or other abusive force exceeds a preset threshold, the locking hook 631 automatically opens and releases the transmission nut 62 under the drive of a component torque, releasing the rotation restriction on the massage arm 40 and allowing the massage arm 40 to quickly collapse to a safe position. This prevents the hard, protruding massage arm 40 from causing secondary impact injuries to the occupant's back, significantly improving collision safety while ensuring the reliability of the daily massage function.

[0031] In this embodiment, as Figures 1 to 6As shown, the structure of the mounting base 10 is not strictly limited, as long as the mounting base 10 can support the drive shaft 30 and the massage arm 40, etc. The mounting base 10 has a receiving compartment inside, and at least a part of the drive shaft 30 is disposed in the receiving compartment and rotatably mounted on the mounting base 10.

[0032] In this embodiment, as Figures 4 to 5 As shown, the massage arm 40 is rotatably connected to the drive shaft 30. When the drive shaft 30 is driven to rotate around a set axis, it drives the massage arm 40 to rotate. Specifically, the massage mechanism 100 also includes a first motor 32 and a worm gear structure 33. The first motor 32 drives the drive shaft 30 to rotate around the set axis through the worm gear structure 33, thereby achieving stable driving and precise control of the drive shaft 30. The first motor 32 is fixed to the receiving chamber of the fixed base 10 by bolts or welding.

[0033] In this embodiment, as Figures 4 to 5 As shown, the worm gear structure 33 includes a first worm 331, a first worm wheel 332, a second worm 333, and a second worm wheel 334. The first worm 331 is fixedly connected to the output shaft of the first motor 32, and the first worm 331 meshes with the first worm wheel 332 for transmission. The first worm wheel 332 is linked to the second worm 333, and the second worm 333 meshes with the second worm wheel 334 for transmission. The second worm wheel 334 is fixedly connected to the drive shaft 30. The first motor 32 drives the first worm 331 to rotate synchronously. The rotational motion of the first worm 331 is converted into the rotation of the first worm wheel 332. The rotation of the first worm wheel 332 drives the second worm 333 to rotate. The rotational motion of the second worm 333 is further converted into the rotation of the second worm wheel 334. The rotation of the second worm wheel 334 ultimately drives the drive shaft 30 to rotate stably around a set axis. The first worm wheel 332 is fixedly connected to the second worm 333 so that the first worm wheel 332 can drive the second worm 333.

[0034] In this embodiment, as Figures 4 to 5 As shown, the massage arm 40 is mounted on the drive shaft 30 via an inclined section or an inclined cam, so that the drive shaft 30 drives the massage arm 40 to oscillate via the inclined section or inclined cam, thereby enabling the massage arm 40 to perform massage actions. When the drive shaft 30 is driven to rotate around a set axis, the rotational motion is converted into the oscillation motion of the massage arm 40 via the inclined section or inclined cam.

[0035] In this embodiment, as Figures 4 to 5As shown, the massage arm 40 is sleeved on the outside of the inclined section and rotatably connected to the inclined section, so that the rotational motion of the drive shaft 30 is directly converted into the swinging motion of the massage arm 40 through the inclined section. This ensures transmission efficiency and simplifies the traditional complex transmission structure, improving reliability while reducing assembly precision requirements. The axis of the inclined section is set at an angle to the axis of the drive shaft 30; the massage arm 40 achieves rotational engagement with the inclined section through bearings.

[0036] In this embodiment, as Figures 1 to 5 As shown, the massage mechanism 100 has two sets of massage arms 40, which are spaced apart circumferentially along the drive shaft 30. The rotation of the drive shaft 30 synchronously drives the two sets of massage arms 40 to swing, so that the two sets of massage arms 40 move closer or further apart axially during the swinging process, thereby realizing the kneading action of the massage mechanism 100 on the user. Each set of massage arms 40 includes at least one massage arm 40, wherein the massage arm 40 includes an arm part 41 and a massage head 42. The arm part 41 is attached to the inclined section; the massage head 42 is attached to the end of the arm part 41.

[0037] In this embodiment, as Figures 1 to 5 As shown, one end of the connecting rod 50 is movably connected to the movable seat 20, and the other end is movably connected to the arm 41. Specifically, the movable seat 20 has a connecting shaft portion, and the connecting rod 50 has a shaft hole that mates with the connecting shaft portion, allowing the connecting rod 50 to be rotatably connected to the movable seat 20; the arm 41 has a spherical groove, and the connecting rod 50 has a universal ball that mates with the spherical groove, allowing the connecting rod 50 to be movably connected to the arm 41, realizing flexible swinging at multiple angles between the connecting rod 50 and the arm 41. The connection point between the connecting rod 50 and the arm 41 is located between the massage head 42 and the drive shaft 30, or the drive shaft 30 is located between the connection point between the connecting rod 50 and the arm 41 and the massage head 42.

[0038] In this embodiment, as Figure 3 , Figure 5 as well as Figure 6 As shown, the structure of the movable seat 20 is not strictly limited, as long as the movable seat 20 can support some of the components in the collapse mechanism 60. The movable seat 20 has an internal mounting cavity, where the transmission nut 62 and the nut locking device 63 are located.

[0039] To limit the movement path of the movable seat 20; referring to one embodiment, such as Figure 3 , Figure 5 as well as Figure 6As shown, a guide structure 21 is provided between the movable seat 20 and the fixed seat 10, and the guide structure 21 is configured to guide the movement path of the movable seat 20. The guide structure 21 includes a guide rod 22 and a guide groove; one of the guide rod 22 and the guide groove is provided in the fixed seat 10, and the other is provided in the movable seat 20. Specifically, both ends of the guide rod 22 are fixed to the fixed seat 10, and the movable seat 20 has a guide groove through which the guide rod 22 passes.

[0040] In this embodiment, as Figures 3 to 6 As shown, the collapse mechanism 60 also includes a second motor 64, which directly or indirectly drives the transmission screw 61 to rotate around its axis. The transmission screw 61 has an external thread, and the transmission nut 62 has a threaded hole that engages with the external thread. When the second motor 64 drives the transmission screw 61 to rotate, the transmission nut 62 moves axially along the transmission screw 61 under the drive of the transmission screw 61, and then pushes the movable seat 20 to translate along a preset guide path through the nut locking device 63.

[0041] In this embodiment, as Figures 6 to 9 As shown, the locking hook 631 has a rod-shaped structure; the locking hook 631 has a first end that pivots on the movable seat 20 and a second end that engages with the transmission nut 62. The first end and the second end of the locking hook 631 are spaced apart along the axial direction of the transmission screw 61; the locking hooks 631 are arranged side by side. The locking spring 632 is a tension spring; the locking spring 632 is connected to the second end of the locking hook 631.

[0042] In this embodiment, as Figures 6 to 10 As shown, the locking hook 631 includes a hook portion 6311, which abuts against the transmission nut 62 on one side along the axial direction of the transmission screw 61, so that the hook portion 6311 and the transmission nut 62 are engaged. The abutment design between the hook portion 6311 and the transmission nut 62 reduces the transmission structure between them, thereby making the structure between the hook portion 6311 and the transmission nut 62 more stable.

[0043] In this embodiment, as Figures 6 to 10 As shown, the engaging force between the locking hook 631 and the transmission nut 62 has a component torque in a horizontal plane perpendicular to the axis of the transmission screw 61; when the abusive force exceeds a preset threshold, this component torque increases and drives a pair of locking hooks 631 to open.

[0044] In this embodiment, as Figures 6 to 10As shown, at least a portion of the transmission nut 62 is located between a pair of locking hooks 631. When the abuse force exceeds a preset threshold, the transmission nut 62 drives the hook portions 6311 of the pair of locking hooks 631 to move in opposite directions, thereby opening the pair of locking hooks 631. When the abuse force, such as from a collision, exceeds the preset threshold, the transmission nut 62 generates a driving displacement under axial load. This displacement is transmitted through the contact surface to the hook portions 6311 of the pair of locking hooks 631, causing the two hook portions 6311 to perform opposite movements. Ultimately, the locking hooks 631 open outward around the pivot point, releasing the axial locking constraint on the transmission nut 62 and triggering the collapse protection mechanism of the massage arm 40.

[0045] In this embodiment, as Figures 6 to 10 As shown, the hook portion 6311 has a first locking surface 6312 that abuts against the transmission nut 62, and the first locking surface 6312 is inclined or perpendicular to the axial direction of the transmission screw 61; and / or, the transmission nut 62 has a second locking surface that abuts against the hook portion 6311; the second locking surface is inclined or perpendicular to the axial direction of the transmission screw 61.

[0046] In this embodiment, as Figures 6 to 9 As shown, when both the first locking surface 6312 and the second locking surface are perpendicular to the axis of the transmission screw 61, a non-zero component torque will be generated in the horizontal plane perpendicular to the axis of the transmission screw 61 due to the assembly gap present during the mechanical assembly process. This torque component caused by the assembly gap is stably constrained by the preload of the locking spring 632 under normal working conditions, ensuring that the locking hook 631 and the transmission nut 62 maintain a reliable engagement state. When the vehicle suffers a collision or other abusive force exceeding the preset threshold, this horizontal component torque increases significantly due to the impact load, exceeding the locking force threshold of the locking spring 632, triggering the locking hook 631 to open outward around the pivot point, ultimately achieving the automatic release of the transmission nut 62 and the safe collapse of the massage arm 40.

[0047] In this embodiment, as Figure 10 As shown, when at least one of the first locking surface 6312 and the second locking surface is inclined to the axial direction of the transmission screw 61, the first locking surface 6312 of the pair of locking hooks 631 are both facing the transmission screw 61; the second locking surfaces on both sides of the transmission nut 62 are both facing away from the transmission screw 61. The included angle between the first locking surface 6312 and the second locking surface and the axial direction of the transmission screw 61 is not less than 85 degrees; if the included angle is too small, the horizontal component torque will be significantly enhanced, which can improve the collapse response speed, but will greatly reduce the locking stability during normal massage.

[0048] In this embodiment, as Figures 7 to 9As shown, each of the pair of locking hooks 631 has a connecting post, and the two ends of the tension spring are securely connected to the two connecting posts through hook rings; the elastic preload of the tension spring is transmitted to the locking hooks 631 through the connecting posts to ensure that the two locking hooks 631 maintain a reliable closed locking state in a non-collapsed state.

[0049] In this embodiment, as Figures 6 to 10 As shown, an anti-rotation structure 65 is provided between the locking hook 631 and the transmission nut 62. The anti-rotation structure 65 is configured to restrict the transmission nut 62 from rotating with the transmission screw 61. The anti-rotation structure 65 includes an anti-rotation groove 651 provided on the transmission nut, and a portion of the locking hook 631 is located within the anti-rotation groove 651. When the transmission screw 61 rotates and drives the transmission nut 62 to move axially, the cooperation between the anti-rotation groove 651 and the locking hook 631 forms an effective anti-rotation support, ensuring that the transmission nut 62 only slides along the screw axis and does not rotate around the axis.

[0050] In this embodiment, as Figures 8 to 9 As shown, the transmission nut 62 has a guide surface 621. When the massage arm 40 switches from the safe position to the massage position, the transmission nut 62 moves axially along the transmission screw 61. The guide surface 621 guides the locking hook 631 to re-engage with the transmission nut 62, so that the massage arm 40 is in the massage position. When the massage arm 40 is in the safe position, the transmission nut 62 is located on one side of the locking hook 631. When the massage arm 40 switches from the safe position to the massage position, the transmission screw 61 drives the transmission nut 62 to move towards the locking hook 631. At this time, the guide surface 621 causes the hook portions 6311 of the pair of locking hooks 631 to perform opposite movements, causing the locking hooks 631 to open outward around the pivot point until the locking hooks 631 re-engage with the transmission nut 62. The guide surface 621 is inclined to the axis of the transmission screw 61.

[0051] The following describes the collapse process of the massage mechanism 100: When a car is involved in a collision, if the force (impact force) exceeds a preset threshold, the component torque increases significantly due to the impact load, exceeding the locking force threshold of the locking spring 632. At this time, the hooks 6311 of a pair of locking hooks 631 open outward around the pivot point under the torque drive, and the hooks 6311 that were originally engaged with the transmission nut 62 disengage. The transmission nut 62 loses the axial locking constraint of the locking hooks 631, and the transmission connection between the movable seat 20 and the fixed seat 10 is released. At this time, the massage arm 40 loses its rotation restriction through the connection structure between the connecting rod 50 and the movable seat 20; the massage arm 40 quickly rotates to a preset safe position (usually a hidden position close to the seat back), avoiding secondary impact injury to the occupant's back caused by the hard protruding massage head 42.

[0052] Once the collision risk has been eliminated, the massage mechanism needs to be restored to normal operation through a system reset. The reset process of the massage mechanism 100 is described below: The second motor 64 drives the transmission screw 61 to rotate; the transmission nut 62 moves in the opposite direction along the axis of the transmission screw 61 under the action of thread engagement. At this time, the guide surface 621 guides the locking hook 631 to re-engage with the transmission nut 62, thereby restoring the massage arm 40 to the massage position.

[0053] like Figures 1 to 9 As shown, this application also provides an automobile seat, including a seat frame and a massage mechanism 100; the massage mechanism 100 is configured as the massage mechanism 100 in the above embodiments.

[0054] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A massage mechanism for car seats, comprising a fixed base, a movable base, a drive shaft, a massage arm, and a connecting rod, wherein the massage arm is connected to the movable base via the connecting rod and is rotatable around the drive shaft; characterized in that: A collapsing mechanism is provided between the movable seat and the fixed seat. The collapsing mechanism is used to release the rotation restriction on the massage arm so that the massage arm collapses to a safe position when the abuse force on the car exceeds a preset threshold. The collapsible mechanism includes a transmission screw connected to a fixed seat, a transmission nut cooperating with the transmission screw, and a nut locking device provided on a movable seat. The nut locking device includes a pair of locking hooks and a locking spring. One end of the locking hook is pivotally connected to the movable seat, and the other end engages with the transmission nut to lock the transmission nut. The locking spring is connected between the pair of locking hooks and is used to apply a locking force to the locking hooks. When the abuse force on the car exceeds a preset threshold, the engagement force between the locking hook and the transmission nut generates a component torque that can drive the locking hook to rotate. The component torque drives a pair of locking hooks to the open position and releases the transmission nut to remove the restriction on the rotation of the massage arm.

2. The massage mechanism for a car seat according to claim 1, characterized in that, The engaging force between the locking hook and the transmission nut has a component torque in a horizontal plane perpendicular to the axis of the transmission screw; When the abuse force exceeds a preset threshold, the component torque increases and drives a pair of locking hooks to open.

3. A massage mechanism for a car seat according to claim 1 or 2, characterized in that, The locking hook includes a hook portion that abuts against one side of the transmission nut along the axial direction of the transmission screw, so that the hook portion engages with the transmission nut.

4. A massage mechanism for a car seat according to claim 3, characterized in that, The hook portion has a first locking surface that abuts against the transmission nut, and the first locking surface is inclined or perpendicular to the axial direction of the transmission screw; and / or The transmission nut has a second locking surface that abuts against the hook portion, and the second locking surface is inclined or perpendicular to the axial direction of the transmission screw.

5. A massage mechanism for car seats according to claim 1, characterized in that, The locking hook has a first end pivoting on the movable seat and a second end engaging with the transmission nut, the first end and the second end of the locking hook being spaced apart along the axial direction of the transmission screw; The locking spring is connected to the second end of the locking hook.

6. A massage mechanism for a car seat according to claim 1, characterized in that, An anti-rotation structure is provided between the locking hook and the transmission nut, and the anti-rotation structure is configured to restrict the transmission nut from rotating with the transmission screw.

7. A massage mechanism for a car seat according to claim 6, characterized in that, The anti-rotation structure includes an anti-rotation groove provided on the transmission nut, and a portion of the locking hook is located within the anti-rotation groove.

8. A massage mechanism for a car seat according to claim 1, characterized in that, A guide structure is provided between the movable seat and the fixed seat, and the guide structure is configured to guide the movement path of the movable seat.

9. A massage mechanism for a car seat according to claim 1, characterized in that, The transmission nut has a guide surface; When the massage arm switches from the safe position to the massage position, the transmission nut moves axially along the transmission screw, and the guide surface is used to guide the locking hook to re-engage with the transmission nut.

10. A car seat, comprising a seat frame and a massage mechanism; characterized in that, The massage mechanism is configured as any one of claims 1 to 9.

Images