An electrically powered seat cushion folding mechanism

Abstract

This invention relates to the field of automotive seat technology, specifically to an electric seat cushion folding mechanism; comprising: a connecting base frame, wherein two connecting base frames are provided and arranged opposite to each other; a seat cushion frame, hinged between the two connecting base frames, the rear end of the seat cushion frame being hinged to the two connecting base frames via a first hinge axis; an adjustment module, disposed at the front end of the seat cushion frame, the adjustment module having two angle adjusters capable of multi-angle synchronous adjustment; a support flipping frame, fixedly disposed at the adjustment ends of the two angle adjusters; and a drive linkage, disposed between the connecting base frame and the support flipping frame, the front end of the drive linkage being hinged to the adjustment ends of the two angle adjusters, and the rear end being hinged to the connecting base frame; this invention can stably fold the seat cushion while maintaining a constant backrest angle, provides high support strength, and is easy to adjust.

Description

Technical Field

[0001] This invention relates to the field of automotive seat technology, specifically to an electric seat cushion folding mechanism. Background Technology

[0002] With the development of intelligent vehicles and multifunctional cabins, most seats typically use either a fully folded-down backrest or a removable seat cushion to create more in-car storage space or to meet the needs of pets or temporary item placement. While folding down the backrest creates a larger cargo space, it occupies the rear area and prevents the seat cushion from being released while the backrest is in use. Removing the seat cushion is not only cumbersome but also difficult to meet the needs of frequently switching between usage scenarios.

[0003] In addition, some seats with folding cushions often use manual folding or simple hinge structures, which have insufficient folding driving force and poor synchronization. They are prone to shaking or tilting during the folding process, making it difficult to balance the structural strength of the seat cushion frame, folding stability and reliability. This is especially true for split-type seat cushions, which are more likely to have problems such as left and right asynchrony, reduced load-bearing capacity and increased connection gaps after long-term use, thus affecting the overall user experience and safety reliability of the vehicle. Summary of the Invention

[0004] To address the aforementioned issues, an electric seat cushion folding mechanism is provided. This mechanism enables stable folding of the seat cushion while maintaining a constant backrest angle, thereby solving the technical problems of insufficient space conversion capability, poor seat cushion folding stability, insufficient synchronization, and difficulty in balancing structural strength and multi-scenario application requirements in existing automotive seats.

[0005] To address the problems of existing technologies, this invention provides an electric seat cushion folding mechanism, comprising: two connecting base frames arranged opposite each other; a seat cushion frame hinged between the two connecting base frames, the rear end of the seat cushion frame being hinged to the two connecting base frames via a first hinge axis; an adjustment module disposed at the front end of the seat cushion frame, the adjustment module having two angle adjusters capable of multi-angle synchronous adjustment; a support flipping frame fixedly disposed at the adjustment ends of the two angle adjusters; and a drive linkage disposed between the connecting base frames and the support flipping frame, the front end of the drive linkage being hinged to the adjustment ends of the two angle adjusters, and the rear end being hinged to the connecting base frame; wherein, the angle adjusters are used to drive the support flipping frame to rotate around the front end of the seat cushion frame; the support flipping frame, drive linkage, connecting base frames, and seat cushion frame together form a non-equilateral four-bar linkage mechanism, causing the seat cushion frame to fold around the rear end first hinge axis toward the connecting base frame, thereby achieving seat cushion folding and storage.

[0006] Preferably, the adjustment module further includes a drive shaft capable of driving the two adjusters to rotate synchronously and a drive motor capable of driving the drive shaft to adjust; the drive shaft is laterally rotatably disposed at the front end of the seat cushion frame; the drive motor is fixedly disposed on the seat cushion frame and is connected to the drive shaft for transmission; the two adjusters are relatively fixedly disposed on the drive shaft and respectively disposed near the two ends of the drive shaft.

[0007] Preferably, the support flip frame is arranged in the form of a rectangular frame structure; the support flip frame is arranged horizontally between the two angle adjusters and its rear end is fixedly connected to the adjustment end of the two angle adjusters respectively; in the non-folded state, the support flip frame and the seat cushion frame are arranged perpendicularly, and in the flipped state, the support flip frame and the seat cushion frame are arranged at an acute angle.

[0008] Preferably, there are two drive links; the two drive links are respectively disposed on both sides of the seat cushion frame; the rear ends of the two drive links are respectively hinged to the corresponding connecting base frame; the front ends of the two drive links are respectively hinged to the adjusting ends of the two angle adjusters through two hinge parts, so as to maintain the synchronicity of the support flipping frame during the flipping process.

[0009] Preferably, the seat cushion frame is a rectangular frame; the seat cushion frame is used to support the seat cushion body; the rear end of the seat cushion frame serves as the folding center; and the drive shaft is located at the front end of the seat cushion frame.

[0010] Preferably, the first hinge shaft between the rear end of the seat cushion frame and the connecting base frame, the drive shaft, the first hinge point where the rear end of the drive link is hinged to the connecting base frame, and the third hinge point where the front end of the drive link is hinged to the hinge part together constitute a non-equilateral four-bar linkage mechanism; so that the seat cushion frame is driven to fold synchronously around the first hinge shaft during the rotation of the support flipping frame.

[0011] Preferably, in the unfolded state, the support flip frame and the seat cushion frame are set at an angle, and the support flip frame is used to support the seat cushion frame to keep it in a horizontal state; in the folded state, the support flip frame swings back towards the seat cushion frame, so that the support flip frame and the seat cushion frame are set in a nearly parallel state; at the same time, the seat cushion frame folds around the first hinge axis towards the connecting base frame.

[0012] Preferably, when the drive motor drives the drive shaft to rotate continuously, the angle adjuster first drives the support flip frame to swing around the drive shaft; then, the drive linkage pushes the seat cushion frame to fold synchronously around the first hinge axis; so that the seat cushion frame gradually switches from the unfolded state to the folded state; and so that the support flip frame gradually switches from the supporting state to the close-fitting storage state, so as to reduce the overall space occupied by the seat cushion and realize the folding.

[0013] The advantages of this invention compared to the prior art are: 1. This invention uses a non-equilateral four-bar linkage mechanism composed of a support flipping frame, a drive linkage, a connecting base frame, and a seat cushion frame to convert the support flipping action into an overall folding action of the seat cushion frame. When used with a drive shaft and a drive motor, only a single drive source is needed to complete the seat cushion folding, reducing the number of drive components and improving the integration of the mechanism and transmission efficiency.

[0014] 2. This invention employs an angle adjuster and drive linkage that are set synchronously on the left and right sides, and drives them synchronously through the same drive shaft, so that the two sides of the support flipping frame always move in a consistent manner. This effectively avoids the problems of swaying, jamming and uneven force caused by asynchronous left and right movements in traditional flipping mechanisms, and improves the stability and reliability of flipping.

[0015] 3. This invention utilizes a non-equilateral four-bar linkage motion trajectory to make the seat cushion frame move smoothly along a preset trajectory during the folding process, and to make the support flipping frame eventually form a near-parallel fit with the seat cushion frame. While ensuring smooth folding, it effectively reduces the overall space occupied by the seat cushion after folding and improves the utilization rate of the vehicle's interior space. Attached Figure Description

[0016] Figure 1 This is a side view of an electric seat folding mechanism in its unfolded state.

[0017] Figure 2 This is a side view of an electric seat folding mechanism in its folded state.

[0018] Figure 3 This is a 3D diagram of an electric seat cushion folding mechanism.

[0019] Figure 4 This is a three-dimensional diagram of a partial structure of an electric seat cushion folding mechanism.

[0020] Figure 5 This is a side view of the seat frame, support flipping frame, and drive linkage in the unfolded state of an electric seat folding mechanism.

[0021] Figure 6 This is a side view of the seat frame, support flipping frame, and drive linkage in the folded state of an electric seat folding mechanism.

[0022] The numbers on the map are: 1. Connecting base frame; 2. Seat cushion frame; 21. First hinge axis; 3. Support tilting frame; 4. Adjustment module; 41. Angle adjuster; 42. Drive shaft; 43. Drive motor; 5. Drive link; 51. Hinge. Detailed Implementation

[0023] To further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0024] See Figures 1 to 6 As shown: An electric seat cushion folding mechanism includes: a connecting base frame 1, wherein two connecting base frames 1 are provided and arranged opposite each other; a seat cushion frame 2, hinged between the two connecting base frames 1, the rear end of the seat cushion frame 2 being hinged to the two connecting base frames 1 via a first hinge shaft 21; an adjustment module 4, disposed at the front end of the seat cushion frame 2, the adjustment module 4 having two angle adjusters 41 capable of multi-angle synchronous adjustment; a support folding frame 3, fixedly disposed at the adjustment ends of the two angle adjusters 41; and a drive linkage 5, provided with... Between the connecting base frame 1 and the supporting flip frame 3, the front end of the driving link 5 is hinged to the adjusting ends of the two angle adjusters 41, and the rear end is hinged to the connecting base frame 1; wherein, the angle adjuster 41 is used to drive the supporting flip frame 3 to rotate around the front end of the cushion frame 2; the supporting flip frame 3, the driving link 5, the connecting base frame 1 and the cushion frame 2 together form a non-equilateral four-bar linkage mechanism, so that the cushion frame 2 folds around the rear first hinge axis 21 toward the connecting base frame 1 to realize the folding and storage of the cushion.

[0025] The rear end of the seat cushion frame 2 is rotatably connected to two connecting base frames 1 via a first hinge shaft 21, allowing the seat cushion frame 2 to fold around the first hinge shaft 21. When the two angle adjusters 41 in the adjustment module 4 synchronously drive the support flipping frame 3 to change its angle, the support flipping frame 3 does not flip independently during the movement. Instead, it is hinged to the drive linkage 5 via a hinge part 51, and its rear end is driven by the angle adjuster 41, forming a non-equilateral four-bar linkage mechanism together with the connecting base frame 1 and the seat cushion frame 2. When the angle adjuster 41 drives the support flipping frame 3 to rotate around the front end of the seat cushion frame 2, the drive linkage 5 synchronously changes the direction of force and pushes the seat cushion frame 2 to fold as a whole around the first hinge shaft 21 towards the connecting base frame 1, so that the seat cushion frame 2, the support flipping frame 3, and the drive linkage 5 form a synchronous linkage relationship, thereby realizing the switching of the seat cushion from the use state to the folded storage state, thus realizing the overall folding of the seat cushion and simplifying the drive structure.

[0026] See Figure 3 and Figure 4 As shown: The adjustment module 4 further includes a drive shaft 42 capable of driving the two adjusters 41 to rotate synchronously and an adjustment motor 43 capable of driving the drive shaft 42 to adjust; the drive shaft 42 is laterally rotatably disposed at the front end of the seat frame 2; the adjustment motor 43 is fixedly disposed on the seat frame 2 and is connected to the drive shaft 42 in a transmission manner; the two adjusters 41 are relatively fixedly disposed on the drive shaft 42 and are respectively disposed close to both ends of the drive shaft 42.

[0027] Furthermore, to ensure that the two angle adjusters 41 always maintain synchronous movement, the adjustment module 4 is equipped with a drive shaft 42 that runs horizontally through the front end of the seat frame 2. The two angle adjusters 41 are respectively fixed to both ends of the drive shaft 42 and are driven to rotate synchronously by the same drive shaft 42. The drive motor 43 is fixedly installed on the seat frame 2, and its output end is connected to the drive shaft 42 for transmission. When the drive motor 43 outputs power, it can drive the drive shaft 42 to rotate as a whole, thereby synchronously driving the two angle adjusters 41 to adjust to the same angle, so that the two ends of the support flip frame 3 always maintain synchronous swing, avoiding the problem of twisting, jamming or uneven force on the support flip frame 3 due to asynchronous movement on both sides.

[0028] See Figure 3 and Figure 4 As shown: the support flip frame 3 is arranged in a rectangular frame structure; the support flip frame 3 is arranged horizontally between the two angle adjusters 41 and its rear end is fixedly connected to the adjustment end of the two angle adjusters 41 respectively; in the non-folded state, the support flip frame 3 and the seat cushion frame 2 are arranged vertically; in the flipped state, the support flip frame 3 and the seat cushion frame 2 are arranged at an acute angle.

[0029] The support and tilting frame 3 adopts a rectangular frame structure, which is horizontally connected between two angle adjusters 41 and driven to rotate by the two angle adjusters 41. Under normal use, the support and tilting frame 3 and the seat cushion frame 2 form an approximately vertical spatial support relationship, which is used to support the front end of the seat cushion frame 2 and keep the seat cushion in a stable use posture. When the angle adjuster 41 drives the support and tilting frame 3 to swing gradually towards the seat cushion frame 2, the angle between the two gradually decreases, changing from a vertical state to an acute angle state, providing continuous pushing and pulling space for the drive linkage 5, and gradually driving the seat cushion frame 2 to begin to fold.

[0030] By supporting the folding frame 3 to change posture, a stable spatial support conversion relationship is formed, making the folding process smoother and more continuous, while ensuring that the seat cushion has good support capabilities in different working conditions.

[0031] See Figure 5 and Figure 6As shown: There are two drive linkages 5; the two drive linkages 5 are respectively arranged on both sides of the seat cushion frame 2; the rear ends of the two drive linkages 5 are respectively hinged to the corresponding connecting base frame 1; the front ends of the two drive linkages 5 are respectively hinged to the adjusting ends of the two angle adjusters 41 through two hinge parts 51, so as to maintain the synchronicity of the support flipping frame 3 during the flipping process.

[0032] To ensure balanced force distribution on the support frame 3, the drive linkages 5 are configured as two symmetrical sets, with each set positioned on one side of the seat frame 2. Their rear ends are hinged to the corresponding connecting base frame 1, and their front ends are connected to the corresponding angle adjuster 41 via hinge parts 51. When the angle adjuster 41 drives the support frame 3 to swing, the two sets of drive linkages 5 synchronously change their spatial position and jointly push the seat frame 2 to fold around the first hinge axis 21, ensuring synchronized movement on both sides and preventing unilateral force from causing the seat frame 2 to wobble.

[0033] See Figure 1 , Figure 2 and 5 As shown: the seat cushion frame 2 is a rectangular frame; the seat cushion frame 2 is used to support the seat cushion body; the rear end of the seat cushion frame 2 serves as the folding center; the drive shaft 42 is located at the front end of the seat cushion frame 2.

[0034] The seat cushion frame 2 adopts a rectangular frame structure, which is used to install the seat cushion body and bear the load of the occupants. Its rear end serves as the rotation center of the entire folding mechanism and is connected to the connecting base frame 1 through the first hinge shaft 21. The drive shaft 42 is arranged at the front end of the seat cushion frame 2, so that the driving force generated by the adjustment module 4 can directly act on the front end of the seat cushion frame 2. Together with the support flipping frame 3 and the drive linkage 5, a stable folding motion chain is formed, so that the entire seat cushion frame 2 folds around the rear hinge center without affecting the installation position of the seat cushion body.

[0035] See Figure 4 and Figure 5 As shown: the first hinge shaft 21 between the rear end of the seat cushion frame 2 and the connecting base frame 1, the drive shaft 42, the first hinge point where the rear end of the drive link 5 is hinged to the connecting base frame 1, and the third hinge point where the front end of the drive link 5 is hinged to the hinge part 51 together constitute a non-equilateral four-bar linkage mechanism; causing the seat cushion frame 2 to fold synchronously around the first hinge shaft 21 during the rotation of the support flipping frame 3.

[0036] The rear first hinge shaft 21 of the seat frame 2, the drive shaft 42, the rear hinge point of the drive link 5, and the front hinge point of the drive link 5 together constitute a non-equilateral four-bar linkage. Because the length relationships between the hinge points are different, the entire mechanism can form a non-linear motion trajectory during movement. When the angle adjuster 41 drives the support flipping frame 3 to swing, the drive link 5 not only pushes the seat frame 2 to fold around the first hinge shaft 21, but also changes the folding speed and trajectory of the seat frame 2, making the entire folding process smoother and effectively reducing motion impact.

[0037] See Figure 5 and Figure 6 As shown: In the unfolded state, the support flip frame 3 and the seat cushion frame 2 are set at an angle, and the support flip frame 3 is used to support the seat cushion frame 2 to keep it in a horizontal state; in the folded state, the support flip frame 3 swings back towards the seat cushion frame 2, so that the support flip frame 3 and the seat cushion frame 2 are set in a nearly parallel state; at the same time, the seat cushion frame 2 folds around the first hinge axis 21 towards the connecting base frame 1.

[0038] In the unfolded state, a large support angle is formed between the support flip frame 3 and the seat cushion frame 2. The support flip frame 3, as the main support component at the front end of the seat cushion frame 2, together with the drive linkage 5, maintains the seat cushion in a horizontal state. When entering the folded state, the angle adjuster 41 drives the support flip frame 3 to gradually swing back towards the seat cushion frame 2. Under the action of the drive linkage 5, the seat cushion frame 2 folds synchronously around the first hinge axis 21, so that the support flip frame 3 finally forms a near-parallel fit with the seat cushion frame 2, thereby reducing the height of the entire folding mechanism and reducing the overall space occupied.

[0039] See Figure 3 , Figure 4 and Figure 5 As shown: When the drive motor 43 drives the drive shaft 42 to rotate continuously, the angle adjuster 41 first drives the support flip frame 3 to swing around the drive shaft 42; then, the drive linkage 5 pushes the seat cushion frame 2 to fold synchronously around the first hinge shaft 21; so that the seat cushion frame 2 gradually switches from the unfolded state to the folded state; and so that the support flip frame 3 gradually switches from the supporting state to the close-fitting storage state, so as to reduce the overall space occupied by the seat cushion and realize the folding.

[0040] When the drive motor 43 starts, it first drives the drive shaft 42 to rotate. The drive shaft 42 then synchronously drives the two angle adjusters 41 to rotate. The angle adjusters 41 first drive the support flipping frame 3 to swing around the drive shaft 42. When the support flipping frame 3 moves to a predetermined angle, it generates a pushing and pulling action towards the connecting base frame 1 through the drive linkage 5 hinged to itself, thereby driving the seat cushion frame 2 to fold synchronously around the first hinge axis 21. As the drive shaft 42 continues to rotate, the support flipping frame 3 gradually approaches the seat cushion frame 2, and the seat cushion frame 2 synchronously completes the overall folding, finally switching from the unfolded state to the folded storage state.

[0041] The entire folding process is completed continuously by a single drive source, and the support flipping and seat cushion folding are automatically achieved through the sequence of movements, resulting in a high degree of automation.

[0042] This invention enables stable folding of the seat cushion while maintaining the backrest angle, provides high support strength, and is easy to adjust.

[0043] The above embodiments only illustrate one or more implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention.

Claims

1. An electric seat cushion folding mechanism, characterized in that, include: Two connecting base frames are provided and arranged opposite to each other. A seat cushion frame is hinged between two connecting base frames, and the rear end of the seat cushion frame is hinged to the two connecting base frames via a first hinge axis. An adjustment module is located at the front end of the seat cushion frame, and the adjustment module is equipped with two angle adjusters capable of multi-angle synchronous adjustment; A support frame is fixedly mounted on the adjustment ends of the two angle adjusters; A drive link is disposed between the connecting base frame and the supporting tilting frame. The front end of the drive link is hinged to the adjustment ends of the two angle adjusters, and the rear end is hinged to the connecting base frame. The angle adjuster is used to drive the support flip frame to rotate around the front end of the seat cushion frame; The supporting flipping frame, drive linkage, connecting base frame and seat cushion frame together form a non-equilateral four-bar linkage mechanism, which causes the seat cushion frame to fold around the rear first hinge axis toward the connecting base frame to achieve seat cushion folding and storage.

2. The electric seat cushion folding mechanism according to claim 1, characterized in that, The adjustment module also includes a drive shaft capable of driving the two angle adjusters to rotate synchronously and a drive motor capable of driving the drive shaft to adjust. The drive shaft is laterally rotatable at the front end of the seat cushion frame; The drive motor is fixedly mounted on the seat cushion frame and is connected to the drive shaft for transmission. The two angle adjusters are fixedly mounted on the drive shaft and are respectively positioned close to both ends of the drive shaft.

3. The electric seat cushion folding mechanism according to claim 1, characterized in that, The supporting tilting frame is configured with a rectangular frame structure; The support flipping frame is horizontally arranged between the two angle adjusters and its rear end is fixedly connected to the adjustment end of the two angle adjusters respectively. In the non-folded state, the support flip frame and the seat cushion frame are arranged perpendicularly; in the flipped state, the support flip frame and the seat cushion frame are arranged at an acute angle.

4. The electric seat cushion folding mechanism according to claim 1, characterized in that, The drive linkage is provided in two parts; the two drive linkages are respectively arranged on both sides of the seat cushion frame; The rear ends of the two drive links are respectively hinged to the corresponding connecting base frame; The front ends of the two drive linkages are respectively hinged to the adjustment ends of the two angle adjusters through two hinge parts to maintain the synchronicity of the support flipping frame during the flipping process.

5. The electric seat cushion folding mechanism according to claim 2, characterized in that, The seat cushion frame is a rectangular frame. The cushion frame is used to support the cushion body; The rear end of the seat cushion frame serves as the folding center; The drive shaft is located at the front end of the seat cushion frame.

6. The electric seat cushion folding mechanism according to claim 5, characterized in that, The first hinge shaft between the rear end of the seat frame and the connecting base frame, the drive shaft, the first hinge point where the rear end of the drive link is hinged to the connecting base frame, and the third hinge point where the front end of the drive link is hinged to the hinge part together constitute a non-equilateral four-bar linkage. During the rotation of the support flipping frame, the seat cushion frame is driven to flip synchronously around the first hinge axis.

7. The electric seat cushion folding mechanism according to claim 1, characterized in that, In the unfolded state, the support flip frame and the seat cushion frame are set at an angle, and the support flip frame is used to support the seat cushion frame to keep it in a horizontal state; In the folded state, the support flip frame swings back towards the seat cushion frame, so that the support flip frame and the seat cushion frame are set in a nearly parallel state; At the same time, the seat cushion frame folds around the first hinge axis toward the connecting base frame.

8. The electric seat cushion folding mechanism according to claim 2, characterized in that, When the drive motor drives the drive shaft to rotate continuously The angle adjuster first drives the support tilting frame to swing around the drive shaft; Subsequently, the seat cushion frame is pushed to fold synchronously around the first hinge axis via the drive linkage; The seat cushion frame is gradually switched from an unfolded state to a folded state; The support frame gradually switches from a supporting state to a close-fitting storage state to reduce the overall space occupied by the cushion and achieve folding.

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