Unpowered self-locking type automobile seat leg support device and automobile seat with same

Abstract

The invention discloses an unpowered self-locking type automobile seat leg support device, and belongs to the technical field of automobile seat accessories. Comprising a support mechanism which is fixed to the opposite side of an automobile seat framework; the leg bracket corresponds to the right side of the bracket mechanism; the front connecting rod mechanism is connected between the front side of the bracket and the front side of the leg bracket, and the rear connecting rod mechanism is connected between the rear side of the bracket mechanism and the rear side of the leg bracket; the driving beam is fixed between the opposite sides of the ends, facing the support mechanism, of the front connecting rod mechanism and the rear connecting rod mechanism, and the unpowered self-locking mechanism is connected with the support mechanism and the driving beam. The device has the advantages of simplifying the structure, reducing the fault probability and tending to be maintenance-free; noise in the operation process is avoided, and the comfortable experience of a passenger is met; the dependence on vehicle-mounted power supply support is avoided; the device is convenient and labor-saving, is suitable for various types of vehicles, and has no choice on the types of the vehicles.

Description

Technical Field

[0001] This invention belongs to the field of automotive seat accessory technology, specifically relating to a non-powered self-locking automotive seat leg support device, and also to the automotive seat thereof. Background Art

[0002] As is well known, leg rests are typically found in the seats of relatively high-end luxury vehicles and mid-to-high-end vehicles, designed to provide a comfortable riding experience. The positive benefits of having leg rests include at least the following: relieving lower back fatigue and strain; improving driving safety; enhancing ride comfort; providing good personalized support; increasing lumbar support and reducing pressure on the lumbar spine, thus offering health protection; and improving the interior aesthetics of the vehicle, among others.

[0003] Numerous patent documents contain technical information related to leg rests, such as CN222554799U (an electric leg rest mechanism for a car seat), CN117382514A (a leg rest device for a car seat), CN120056840A (a leg rest structure and a car seat), CN222202348U (an electric adjustable leg rest for a car seat), CN222946613U (a leg rest and a car seat), CN119749383A (an electric thigh support mounting structure), CN111660901A (a leg rest drive device for a car seat), CN120056840A (a leg rest structure and its car seat), Taiwan patent TW201538363A (a leg rest adjustment structure for a car seat), and German patent DE202019103838U1 (an electric sofa frame), and so on.

[0004] A common feature of these patents, not limited to those listed above, is that the power components driving the extension or retraction of the connecting rods, which in turn cause the leg supports to extend and retract, are all powered by an onboard motor driving a reduction gearbox (such as a worm gear reducer). The reduction gearbox then drives the connecting rod assembly via a drive beam, and finally, the connecting rod assembly drives the leg supports. The disadvantages of this structural system are: due to the need for a motor and worm gear reducer, the structure is complex and costly to manufacture, and the probability of failure during use is high; the noise level driven by the motor is typically above 40-50 dB, and the movement is not smooth, failing to meet the comfort requirements of passengers; the electric system is susceptible to circuit aging and gear wear, especially in environments requiring relatively frequent adjustments or high vibration (such as off-road vehicles), making repairs and even replacements difficult; and the need for continuous power supply results in a lack of energy efficiency. And so on.

[0005] Based on the applicant's market research, long-term observation, and statistical analysis, it is believed that the current widespread use of electric motors is due to certain prejudices. For example, there is a common perception that manual operation gives a sense of inferiority, thus inhibiting technological innovation and the necessary motivation for innovation. However, practice has proven that as long as the structure is reasonable, economical, has a near-zero failure rate, high reliability, ideal resistance to complex environments, meets the requirements of compact structure, and is easy for even women and children to operate, then it is undoubtedly a beneficial approach. Summary of the Invention

[0006] The objective of this invention is to provide a non-powered self-locking car seat leg rest device that helps to significantly simplify the structure and reduce the probability of failure by eliminating power sources such as motors, significantly reduces noise during operation to meet the comfort experience expected by passengers, is beneficial to completely eliminate the need for onboard power support to avoid the constraints of circuitry, facilitates convenient and effortless operation, and is adaptable to a wide range of vehicle types to avoid being restricted by various demanding factors.

[0007] Another objective of the present invention is to provide an automobile seat that accurately reflects the effects of a non-powered self-locking automobile seat leg rest device.

[0008] The present invention achieves its objective by providing a non-powered self-locking car seat leg support device, comprising: a support mechanism fixed to the opposite side of the car seat frame during use; a leg support corresponding to the right side of the support mechanism in the unfolded state; a front linkage mechanism and a corresponding rear linkage mechanism, the front linkage mechanism connecting the front side of the support mechanism and the front side of the leg support, and the rear linkage mechanism connecting the rear side of the support mechanism and the rear side of the leg support; and a drive beam fixed between the opposite sides of the front and rear linkage mechanisms facing the support mechanism. The invention is characterized by further including a non-powered self-locking mechanism connected to the support mechanism and the drive beam.

[0009] In a specific embodiment of the present invention, the bracket mechanism includes a front fixing plate of a car seat frame, a rear fixing plate of a car seat frame, and a fixing plate connecting support beam. The front and rear fixing plates of the car seat frame are corresponding to each other and are fixed to the opposite side of the car seat frame in use. The fixing plate connecting support beam is fixed between the opposite sides of the front and rear fixing plates of the car seat frame. The non-powered self-locking mechanism is connected to the side of the rear fixing plate of the car seat frame facing the front fixing plate or the side of the front fixing plate of the car seat frame facing the rear fixing plate and the downward-facing side of the drive beam. The front linkage mechanism is hinged between the front side of the front fixing plate of the car seat frame and the front side of the leg rest, and the rear linkage mechanism is hinged between the rear side of the rear fixing plate of the car seat frame and the rear side of the leg rest.

[0010] In another specific embodiment of the present invention, the powerless self-locking mechanism includes a self-locking actuating cylinder, an actuating cylinder support connector, a drive linkage plate, a locking plate linkage, and a locking plate. A cylinder hinge seat is fixed on the left end face of the cylinder body of the self-locking actuating cylinder. The cylinder hinge seat is hinged to the cylinder hinge column shaft, which is fixed to a hinge frame. The hinge frame is fixed to the side of the rear fixing plate of the car seat frame facing the front fixing plate of the car seat frame or to the side of the front fixing plate of the car seat frame facing the rear fixing plate of the car seat frame. The actuating cylinder support of the self-locking actuating cylinder faces to the right and is connected to the actuating cylinder support connector, which is hinged to the actuating cylinder support connector. On the head half-shaft, the actuating cylinder support connecting head half-shaft is fixed to the front side of the end of the drive connecting rod plate facing the leg bracket. The end of the drive connecting rod plate facing the leg bracket is hinged to one end of the locking plate connecting rod via the first hinge pin of the drive connecting rod plate, and the end of the drive connecting rod plate facing the hinge frame is hinged to the hinge frame via the second hinge pin of the drive connecting rod plate. The other end of the locking plate connecting rod is hinged to the right end of the locking plate via the locking plate connecting rod hinge pin, and the left end of the locking plate is fixedly connected to the downward-facing side of the drive beam. An actuating cylinder support connecting head hinge pin screw is screwed onto the front end face of the actuating cylinder support connecting head half-shaft, and the actuating cylinder support connecting head is hinged to the actuating cylinder support connecting head hinge pin screw.

[0011] In another specific embodiment of the present invention, the cylinder support of the self-locking cylinder is a gas spring support, a hydraulic damping cylinder or a hydropneumatic damping cylinder, the gas is nitrogen or compressed air, and the oil is a base oil, which is mineral hydraulic oil, synthetic hydrocarbon oil or silicone oil.

[0012] In another specific embodiment of the present invention, the front linkage mechanism includes a front drive linkage, a front fixed plate hinge linkage, a first hinge linkage of the leg support front trailing arm, and a second hinge linkage of the leg support front trailing arm. The left end of the front drive linkage is hinged to the upper right end of the front fixed plate of the car seat frame via a left hinge pin. The front drive linkage is fixed to the front end of the drive beam at a position corresponding to the front end of the drive beam by a fixing hole formed in the front drive linkage. The middle part of the front drive linkage is hinged to the middle part of the first hinge linkage of the leg support front trailing arm via a middle hinge pin. The right end of the front drive linkage is hinged to one end of the second hinge linkage of the leg support front trailing arm via a right hinge pin. The front fixed plate is hinged... The left end of the connecting rod is hinged to the lower part of the front fixed plate of the car seat frame via the left pin of the front fixed plate hinge connecting rod, while the right end of the front fixed plate hinge connecting rod is hinged to one end of the first hinge connecting rod of the leg support front longitudinal arm via the right pin of the front fixed plate hinge connecting rod. The other end of the first hinge connecting rod of the leg support front longitudinal arm is hinged to the left front end of the leg support via the pin of the first hinge connecting rod of the leg support front longitudinal arm. The other end of the second hinge connecting rod of the leg support front longitudinal arm is hinged to the middle front part of the leg support via the pin of the second hinge connecting rod of the leg support front longitudinal arm. A stop bar front fixing ear is formed on the upward-facing side of the middle part of the second hinge connecting rod of the leg support front longitudinal arm. A stop bar is fixed between the stop bar front fixing ear and the opposite side of the rear connecting rod mechanism.

[0013] In another specific embodiment of the present invention, the rear linkage mechanism includes a rear drive linkage, a rear fixed plate hinge linkage, a first hinge linkage of the leg support rear longitudinal arm, and a second hinge linkage of the leg support rear longitudinal arm. The left end of the rear drive linkage is hinged to the upper right end of the rear fixed plate of the car seat frame via a left hinge pin. The rear drive linkage is fixed to the rear end of the drive beam at a position corresponding to the rear end of the drive beam by a fixing hole formed in the rear drive linkage. The middle part of the rear drive linkage is hinged to the middle part of the first hinge linkage of the leg support rear longitudinal arm via a middle hinge pin. The right end of the rear drive linkage is hinged to one end of the second hinge linkage of the leg support rear longitudinal arm via a right hinge pin. The rear fixed plate... The left end of the hinge link is hinged to the lower part of the rear fixing plate of the car seat frame via the left pin of the rear fixing plate hinge link, while the right end of the rear fixing plate hinge link is hinged to one end of the first hinge link of the leg support rear longitudinal arm via the right pin of the rear fixing plate hinge link. The other end of the first hinge link of the leg support rear longitudinal arm is hinged to the rear left end of the leg support frame via the pin of the first hinge link of the leg support rear longitudinal arm. The other end of the second hinge link of the leg support rear longitudinal arm is hinged to the rear middle part of the leg support frame via the pin of the second hinge link of the leg support rear longitudinal arm. A stop bar rear fixing ear is formed on the upward-facing side of the middle part of the second hinge link of the leg support rear longitudinal arm. The stop bar is fixed between the opposing sides of the stop bar front fixing ear and the stop bar rear fixing ear.

[0014] In a further specific embodiment of the present invention, the leg support includes a left crossbeam, a right crossbeam, a front longitudinal beam, and a rear longitudinal beam. The first hinge pin of the front longitudinal arm of the leg support is hinged to the left end of the front longitudinal beam, the first hinge pin of the rear longitudinal arm of the leg support is hinged to the left end of the rear longitudinal beam, the second hinge pin of the front longitudinal arm of the leg support is hinged to the front middle section of the front longitudinal beam, and the second hinge pin of the rear longitudinal arm of the leg support is hinged to the rear middle section of the rear longitudinal beam. The left and right crossbeams are spaced apart from each other and parallel to each other, and each of the left and right crossbeams is fixed between the front and rear longitudinal beams of the leg support on the upward-facing side.

[0015] In a further specific embodiment of the present invention, a bracket reinforcing longitudinal beam is fixed between the middle of the left and right crossbeams of the bracket facing downwards in the longitudinal direction.

[0016] In yet another specific embodiment of the present invention, the cross-sectional shape of the front drive link is [ ] shaped, and the cross-sectional shape of the rear drive link is [ ] shaped.

[0017] Another objective of the present invention is accomplished by providing a car seat having the aforementioned unpowered self-locking car seat leg support device.

[0018] The technical advantages of the present invention are as follows: Since the motor and its associated gearbox are eliminated, the structure is significantly simplified and the probability of failure is reduced, making it maintenance-free; since self-locking is achieved without the need for power supply, noise during operation is avoided, satisfying the passenger's desired comfort experience; since it is free from reliance on onboard power, it is not affected by the constraints of electrical circuits; since the leg support can be easily pulled to unfold and retract during operation, it is convenient, labor-saving, and adaptable to a wide range of vehicles, without being picky about vehicle type. Attached Figure Description

[0019] Figure 1 This is a structural diagram of an embodiment of the present invention; Figure 2 for Figure 1 A diagram showing the object in a folded-down state rather than in use. Detailed Implementation

[0020] In order to better understand the technical essence and beneficial effects of the present invention, the applicant provides a detailed description below by way of embodiments. However, the description of the embodiments is not intended to limit the present invention. Any formal but not substantive equivalent transformations made based on the concept of the present invention should be considered within the scope of the present invention.

[0021] In the following description, all directional or positional concepts involving up, down, left, right, front, and back are based on the current position. Figure 1 The location and state of the object are examples, and therefore should not be construed as a special limitation on the technical solution provided by the present invention.

[0022] Please see Figure 1 A bracket mechanism 1 is shown, which is fixed to the opposite side of the car seat frame during use; a leg rest 2 is shown, which is in the unfolded state... Figure 1 The unfolded state shown corresponds to the right side of the aforementioned support mechanism 1; a front linkage mechanism 3 and a rear linkage mechanism 4 corresponding to the front linkage mechanism 3 are shown. The front linkage mechanism 3 is connected between the front side of the aforementioned support 1 and the front side of the aforementioned leg support 2, and the rear linkage mechanism 4 is connected between the rear side of the aforementioned support mechanism 1 and the rear side of the aforementioned leg support 2; a drive beam 5 is shown, which is fixed between the opposing sides of the aforementioned front and rear linkage mechanisms 3 and 4 facing one end of the aforementioned support mechanism 1.

[0023] The key technical point of the technical solution provided by the present invention is that the aforementioned non-powered self-locking car seat leg support device also includes a non-powered self-locking mechanism 6, which is connected to the aforementioned bracket mechanism 1 and the aforementioned drive beam 5.

[0024] The aforementioned front linkage mechanism 3 is essentially a front four-bar linkage mechanism. Similarly, the aforementioned rear linkage mechanism 4 is essentially a rear four-bar linkage mechanism. Their structures and connection methods are identical, and they operate synchronously. The aforementioned concept of non-powered self-locking means that it does not rely on the combination of a motor and a worm gear reducer to achieve action and locking, as in existing technologies. In other words, existing technologies use a motor to drive the worm gear reducer to achieve action, causing the leg support 2 to extend or retract. When the motor and worm gear reducer stop working, the leg support 2 is locked in the extended or retracted state.

[0025] Please stay tuned. Figure 1The aforementioned support mechanism 1 includes a front fixing plate 11 of a car seat frame, a rear fixing plate 12 of a car seat frame, and a fixing plate connecting support beam 13. The front and rear fixing plates 11 and 12 of the car seat frame are corresponding to each other and are fixed to the opposite side of the car seat frame in use. The fixing plate connecting support beam 13 is fixed between the opposite sides of the front and rear fixing plates 11 and 12 of the car seat frame. In this embodiment, the aforementioned non-powered self-locking mechanism 6 is connected to the side of the rear fixing plate 12 of the car seat frame facing the front fixing plate 11 of the car seat frame and the side of the aforementioned drive beam 5 facing downward. The aforementioned front linkage mechanism 3 is hinged between the front side of the aforementioned front fixing plate 11 of the car seat frame and the front side of the aforementioned leg support 2. The aforementioned rear linkage mechanism 4 is hinged between the rear side of the aforementioned rear fixing plate 12 of the car seat frame and the rear side of the aforementioned leg support 2.

[0026] The applicant should clarify that if the aforementioned non-powered self-locking mechanism 6 is connected to the side of the aforementioned front fixing plate 11 of the car seat frame facing the rear fixing plate 12 of the car seat frame and the side of the drive beam 5 facing downward, that is, transferred from the front side of the rear fixing plate 12 of the car seat frame to the rear side of the front fixing plate 11 of the car seat frame, then it undoubtedly belongs to the formal rather than the substantive equivalent change and still falls within the scope of the technical content disclosed in this invention.

[0027] Depend on Figure 1 as well as Figure 2 As shown, front fixing plate fixing bolt holes 111 are pre-set (i.e., pre-opened) on the front fixing plate 11 of the car seat frame, and rear fixing plate fixing bolt holes 121 are pre-set (i.e., pre-opened) on the rear fixing plate 12 of the car seat frame. In use, the front and rear fixing plates are fixed to the opposite side of the car seat frame via the front and rear fixing bolt holes 111 and 121 and by means of fasteners such as bolts. The aforementioned fixing plate connecting support beam 13 preferably, but not limited to, uses a hollow cylindrical structure, and is preferably welded between the opposite sides of the front and rear fixing plates 11 and 12 of the car seat frame. Of course, if a square tube, irregularly shaped tube, or other similar tube is used instead of the aforementioned shape of the fixing plate connecting support beam 13 of the present invention, it is an equivalent substitution and still falls within the scope of the structure covered by the present invention.

[0028] Please stay tuned. Figure 1The aforementioned non-powered self-locking mechanism 6 includes a self-locking cylinder 61, a cylinder support connector 62, a drive linkage plate 63, a locking plate linkage 64, and a locking plate 65. A cylinder hinge seat 611 is fixed on the left end face of the cylinder body of the self-locking cylinder 61. The cylinder hinge seat 611 is hinged to the cylinder hinge shaft 6111, which is fixed to the hinge frame 61111. The hinge frame 61111 is preferably fixed to the side of the rear fixing plate 12 of the aforementioned car seat frame facing the front fixing plate 11 of the aforementioned car seat frame by screws. The cylinder support 612 of the self-locking cylinder 61 faces to the right and is fixedly connected to the cylinder support connector 62. The cylinder support connector 62 is hinged to the cylinder support connector half-shaft 621, which is fixed to the drive linkage plate 63 facing the left end face of the cylinder body. The drive linkage plate 63 is hinged to one end of the leg support 2 (i.e., the right end) and to one end of the locking plate linkage 64 via the first hinge pin 631. The drive linkage plate 63 is hinged to the front side of the hinge frame 61111 via the second hinge pin 632. The other end of the locking plate linkage 64 is hinged to the right end of the locking plate 65 via the locking plate linkage hinge pin 641. The left end of the locking plate 65 is preferably fixedly connected to the downward-facing side of the drive beam 5 by welding. A cylinder support connector hinge pin screw 6211 is screwed onto the front end face of the cylinder support connector half shaft 621. The cylinder support connector 62 is hinged to the cylinder support connector hinge pin screw 6211.

[0029] If the articulation bracket 61111 is set on the rear side of the front fixing plate 11 of the car seat frame facing the rear fixing plate 12 of the car seat frame, then the aforementioned cylinder articulation seat 611 is hinged to the rear side of the articulation bracket 6111 via the cylinder articulation column shaft 6111.

[0030] As a preferred embodiment, a limiting screw 61112 is provided on the front end face of the aforementioned cylinder hinge column 6111 and on the front side of the cylinder hinge seat 611 to prevent the cylinder hinge seat 611 from detaching from the cylinder hinge column 6111. In effect, this limiting screw 61112 functions as a hinge pin screw, similar to the aforementioned cylinder strut connector hinge pin screw 6211, to which the cylinder hinge seat 611 is hinged. The limiting screw 61112 is fixed to the front end of the cylinder hinge column 6111, and the cylinder hinge seat 611 is hinged to this limiting screw 61112, which is essentially a hinge pin screw.

[0031] Please stay tuned. Figure 1In this embodiment, the cylinder support 612 of the self-locking cylinder 61 is a gas spring support, but it can also be a hydraulic damping column or an oil-gas damping column. The gas is nitrogen or compressed air, and the oil is base oil, which is mineral hydraulic oil, synthetic hydrocarbon oil or silicone oil.

[0032] As can be seen from the above description, the self-locking cylinder 61 of the non-powered self-locking mechanism 6 of the present invention can have at least three types: the first type is a gas spring support 612, the second type is a hydraulic damping column 612, and the third type is an oil-gas damping column 612. This embodiment selects the first type. Because it is the first type, nitrogen gas is injected into the cylinder body of the self-locking cylinder 61, but compressed air can also be used, thus making the self-locking cylinder behave like the industry-standard gas spring cylinder. If it is the second type, then the cylinder body of the self-locking cylinder 61 is filled with base oil such as mineral hydraulic oil, synthetic hydrocarbon oil, or silicone oil. If it is the third type, then the cylinder body of the self-locking cylinder 61 is filled with an oil-gas mixture of hydraulic oil and high-pressure nitrogen, or an oil-gas mixture of silicone oil and compressed air.

[0033] Please stay tuned. Figure 1 The aforementioned four-link structure of the front linkage mechanism 3 includes a front drive linkage 31, a front fixed plate hinge linkage 32, a leg support front trailing arm first hinge linkage 33, and a leg support front trailing arm second hinge linkage 34. The left end of the front drive linkage 31 is hinged to the upper right end of the aforementioned car seat frame front fixed plate 11 via a front drive linkage left hinge pin 311. The front drive linkage 31 is fixed to the front end of the aforementioned drive beam 5 at the position corresponding to the front end of the drive beam 5 via a front drive linkage fixing hole 312. The middle part of the front drive linkage 31 is hinged to the middle part of the leg support front trailing arm first hinge linkage 33 via a front drive linkage middle hinge pin 313. The right end of the front drive linkage 31 is hinged to one end of the leg support front trailing arm second hinge linkage 34 via a front drive linkage right hinge pin 314. The left end of the front fixed plate hinge linkage 32 is hinged to the front fixed plate hinge... The left pivot pin 321 of the connecting rod is hinged to the lower part of the front fixing plate 11 of the car seat frame. The right end of the front fixing plate hinge connecting rod 32 is hinged to one end of the first hinge connecting rod 33 of the leg support front longitudinal arm through the right pivot pin 322 of the front fixing plate hinge connecting rod. The other end of the first hinge connecting rod 33 of the leg support front longitudinal arm, that is, the left end facing the front side of the leg support 2, is hinged to the left end of the front side of the leg support 2 through the pivot pin 331 of the first hinge connecting rod of the leg support front longitudinal arm. The other end of the second hinge connecting rod 34 of the leg support front longitudinal arm, that is, the end facing the leg support 2, is hinged to the middle of the front side of the leg support 2 through the pivot pin 341 of the second hinge connecting rod of the leg support front longitudinal arm. A stop bar front fixing ear 342 is formed on the upward side of the middle part of the second hinge connecting rod 34 of the leg support front longitudinal arm. A stop bar 7 is fixed at the position between the stop bar front fixing ear 342 and the opposite side of the aforementioned rear linkage mechanism 4.

[0034] The aforementioned rear four-link structure includes a rear drive link 41, a rear fixed plate hinge link 42, a leg support rear trailing arm first hinge link 43, and a leg support rear trailing arm second hinge link 44. The left end of the rear drive link 41 is hinged to the upper right end of the aforementioned car seat frame rear fixed plate 12 via a rear drive link left hinge pin 411. The rear drive link 41 is fixed to the rear end of the aforementioned drive beam 5 at a position corresponding to the rear end of the drive beam 5 via a rear drive link fixing hole 412. The middle part of the rear drive link 41 is hinged to the middle part of the leg support rear trailing arm first hinge link 43 via a rear drive link middle hinge pin 413. The right end of the rear drive link 41 is hinged to one end of the leg support rear trailing arm second hinge link 44 via a rear drive link right hinge pin 414. The left end of the rear fixed plate hinge link 42 is hinged to the rear fixed plate hinge link 43. The left pin 421 of the rod is hinged to the lower part of the rear fixing plate 12 of the car seat frame. The right end of the rear fixing plate hinge link 42 is hinged to one end of the first hinge link 43 of the leg support rear longitudinal arm through the right pin 422 of the rear fixing plate hinge link. The other end of the first hinge link 43 of the leg support rear longitudinal arm, that is, the left end facing the rear side of the leg support 2, is hinged to the left rear side of the leg support 2 through the pin 431 of the first hinge link of the leg support rear longitudinal arm. The other end of the second hinge link 44 of the leg support rear longitudinal arm, that is, the end facing the middle of the rear side of the leg support 2, is hinged to the middle rear side of the leg support 2 through the pin 441 of the second hinge link of the leg support rear longitudinal arm. A stop bar rear fixing ear 442 is formed on the upward side of the middle of the second hinge link 44 of the leg support rear longitudinal arm. The aforementioned stop bar 7 is fixed between the opposing sides of the aforementioned stop bar front fixing ear 342 and the stop bar rear fixing ear 442.

[0035] The front end of the aforementioned front drive link 31, corresponding to the front end of the drive beam 5, can be fixed to the front end of the drive beam 5 via the front drive link fixing hole 312 in several ways: one is by welding; the other is by extending the front end of the drive beam 5 through the front drive link fixing hole 312 to the front side of the front drive link 31 and fixing it with a snap ring or cotter pin. This embodiment selects the first method. Since the fixing method of the rear drive link 41, corresponding to the rear end of the drive beam 5, is the same as described above, it will not be repeated.

[0036] Please stay tuned. Figure 1The aforementioned leg support 2 includes a left crossbeam 21, a right crossbeam 22, a front longitudinal beam 23, and a rear longitudinal beam 24. The first hinge pin 331 of the front longitudinal arm of the aforementioned leg support is hinged to the left end of the front longitudinal beam 23. The first hinge pin 431 of the rear longitudinal arm of the aforementioned leg support is hinged to the left end of the rear longitudinal beam 24. The second hinge pin 341 of the front longitudinal arm of the aforementioned leg support is hinged to the front middle section of the front longitudinal beam 23. The second hinge pin 441 of the rear longitudinal arm of the aforementioned leg support is hinged to the rear middle section of the rear longitudinal beam 24. The left crossbeam 21 and the right crossbeam 22 are spaced apart from each other and parallel to each other. The left crossbeam 21 and the right crossbeam 22 are each fixed between the front and rear longitudinal beams 23 and 24 on the upward-facing side.

[0037] Preferably, a bracket reinforcing longitudinal beam 25 is fixed between the middle of the left and right crossbeams 21 and 22 of the aforementioned bracket, facing downwards.

[0038] Preferably, the cross-sectional shape of the aforementioned front drive link 31 is [] shaped, and the cross-sectional shape of the aforementioned rear drive link 41 is [] shaped.

[0039] The present invention also provides a car seat not specifically shown in the figures, which has the aforementioned non-powered self-locking car seat leg support device.

[0040] Please see Figure 2 And combined Figure 1 The applicant describes the invention in both an unfolded, usable state and a folded, non-usable state. When the leg support 2 is pulled upwards, the front and rear longitudinal beams 23 and 24 of the support rotate counterclockwise around the first hinged connecting rod pins 331 and 431 of the front and rear longitudinal arms of the leg support, respectively. During this rotation, the front and rear longitudinal beams 23 and 24 drive the second hinged connecting rods 34 and 44 of the front and rear longitudinal arms of the leg support around the lower ends of the front and rear drive connecting rods 31 and 41 (i.e.,...). Figure 1 The right end shown rotates clockwise, causing the front and rear drive linkages 31 and 41 to rotate counterclockwise around the upper end, i.e., around the left hinge pins 311 and 411 of the front and rear drive linkages, opening the lock plate 65. The front and rear drive linkages 31 and 41, through the drive beam 5, cause the lock plate 65 to rotate counterclockwise. The lock plate 65, through the lock plate linkage hinge pin 641, drives the lock plate linkage 64. The lock plate linkage 64, through the first hinge pin 631 of the drive linkage plate, drives the drive linkage plate 63, causing the upper end of the drive linkage plate 63 (i.e., the right end) to rotate clockwise, opening the lock plate 65. Figure 1The left end shown rotates counterclockwise by a certain angle, causing the drive linkage plate 63 to rotate around the cylinder hinge axis 6111 via the cylinder support connector 62, thus changing the thrust direction of the cylinder support 612. This completely breaks the locking state between the drive linkage plate 63, the hinge link 64, and the locking plate 65. The cylinder support 612 then pushes out, causing the drive linkage plate 63 to rotate further counterclockwise. The drive linkage plate 63 then drives the locking plate 65 to rotate via the locking plate link 64. The locking plate 65, through the drive beam 5, drives the front and rear drive links 31 and 41 to continue rotating counterclockwise around the upper end. The front and rear drive links 31 and 41 are connected by the second hinge of the front and rear longitudinal arms of the leg support. Links 34 and 44 push the front and rear longitudinal beams 23 and 24 of the bracket to rotate and open around the first hinged link pins 331 and 431 of the front and rear longitudinal arms of the leg support until the middle of the front and rear longitudinal beams 23 and 24 of the bracket abuts against the stop bar 7. During this process, the first hinged links 33 and 43 of the front and rear longitudinal arms of the leg support are driven by the rotation of the front and rear drive links 31 and 41 to rotate and open around the hinge joint of the hinged links 32 and 42 of the front and rear fixed plates, that is, around the right pins 322 and 422 of the hinged links of the front and rear fixed plates clockwise. The hinged links 32 and 42 of the front and rear fixed plates also rotate and open counterclockwise around the left pins 321 and 421 of the hinged links of the front and rear fixed plates, so that the leg support 2 is in a certain position. Figure 1 The expanded usage state is shown.

[0041] Conversely, when the leg support 2 is pulled downwards, the front and rear longitudinal beams 23 and 24 of the support rotate clockwise around the upper ends of the first hinged connecting rods 33 and 43 of the front and rear longitudinal arms of the leg support, i.e., around the pins 331 and 431 of the first hinged connecting rods of the front and rear longitudinal arms of the leg support. During the rotation, the front and rear longitudinal beams 23 and 24 of the support drive the second hinged connecting rods 34 and 44 of the front and rear longitudinal arms of the leg support to rotate counterclockwise around the right hinged pins 314 and 414 of the front and rear drive connecting rods, and drive the front and rear drive connecting rods 31 and 41 to rotate clockwise around the left hinged pins 311 and 411 of the front and rear drive connecting rods. The front and rear drive connecting rods 31 and 41, through the drive beam 5, cause the locking plate 65 to rotate clockwise. The locking plate 65, through the locking plate... The connecting rod hinge pin 641 drives the locking plate connecting rod 64. The locking plate connecting rod 64, through the first hinge pin 631 of the driving connecting rod plate, drives the driving connecting rod plate 63 to rotate clockwise around the second hinge pin 632 of the driving connecting rod plate. The driving connecting rod plate 63, through the half-shaft 621 of the actuating cylinder support connector, causes the self-locking actuating cylinder 61 to rotate clockwise around the cylinder body hinge pin 6111, that is, around the limit screw 61112, which essentially acts as a hinge pin screw. During this process, the actuating cylinder support 612 is squeezed and contracted by the half-shaft 621 and the actuating cylinder support connector 62, until the thrust direction of the actuating cylinder support 612 rotates to nearly downwards, as shown. Figure 2In the state shown, the cylinder support 612 pushes the cylinder support connector half-shaft 621 through the cylinder support connector hinge pin screw 6211, so that the drive connecting rod plate 63 always obtains a position around the upper end (i.e. Figure 1 The clockwise rotation of the left end (as shown) drives the connecting rod plate 63 to pull the locking plate connecting rod 64 through the first hinge pin 631. The locking plate connecting rod 64 then pulls the locking plate 65 through the hinge pin 641. The locking plate 65 and the locking plate connecting rod 64 are in a vertical position relative to each other (i.e., they are perpendicular to each other). Figure 2 As shown in the diagram, this state, together with 63, forms a self-locking structure. During the above process, the first hinge links 33 and 43 of the front and rear longitudinal arms of the leg support are driven by the rotation of the front and rear drive links 31 and 41, and rotate counterclockwise around the respective hinge points of the hinge links 32 and 42 of the front and rear fixed plates. The hinge links 32 and 42 of the front and rear fixed plates also rotate clockwise around the left pins 321 and 421 of the hinge links of the front and rear fixed plates, respectively, forming... Figure 2 The image shows the non-enabled folded state (i.e., the collapsed state).

[0042] In summary, the technical solution provided by this invention makes up for the shortcomings of the prior art, successfully completes the invention task, and accurately realizes the technical effects described by the applicant in the above technical effects column.

Claims

1. A non-powered self-locking car seat leg support device, comprising a bracket mechanism (1) fixed to the opposite side of the car seat frame in use; a leg support (2) corresponding to the right side of the bracket mechanism (1) in the unfolded state; a front linkage mechanism (3) and a rear linkage mechanism (4) corresponding to the front linkage mechanism (3), the front linkage mechanism (3) being connected between the front side of the bracket (1) and the front side of the leg support (2), and the rear linkage mechanism (4) being connected between the rear side of the bracket mechanism (1) and the rear side of the leg support (2); and a drive beam (5) fixed between the opposite sides of the front and rear linkage mechanisms (3, 4) facing the bracket mechanism (1), characterized in that: It also includes a non-powered self-locking mechanism (6), which is connected to the support mechanism (1) and the drive beam (5).

2. The non-powered self-locking car seat leg support device according to claim 1, characterized in that: The bracket mechanism (1) includes a front fixing plate (11) of a car seat frame, a rear fixing plate (12) of a car seat frame, and a fixing plate connecting support beam (13). The front and rear fixing plates (11, 12) of the car seat frame are corresponding to each other and are fixed to the opposite side of the car seat frame in use. The fixing plate connecting support beam (13) is fixed between the opposite sides of the front and rear fixing plates (11, 12) of the car seat frame; the non-powered self-locking mechanism (6) is connected to the rear fixing plate of the car seat frame ( 12) The front fixing plate (11) of the car seat frame is connected to the side of the front fixing plate (11) of the car seat frame facing the rear fixing plate (12) of the car seat frame and the side of the drive beam (5) facing downward; the front linkage mechanism (3) is hinged between the front side of the front fixing plate (11) of the car seat frame and the front side of the leg support (2), and the rear linkage mechanism (4) is hinged between the rear side of the rear fixing plate (12) of the car seat frame and the rear side of the leg support (2).

3. The non-powered self-locking car seat leg support device according to claim 2, characterized in that: The non-powered self-locking mechanism (6) includes a self-locking cylinder (61), a cylinder support connector (62), a drive linkage plate (63), a locking plate linkage (64), and a locking plate (65). A cylinder hinge seat (611) is fixed on the left end face of the cylinder body of the self-locking cylinder (61). The cylinder hinge seat (611) is hinged to the cylinder hinge column shaft (6111), and the cylinder hinge column shaft (6111) is fixed to the hinge frame (61111). The frame (61111) is fixed to the side of the rear fixing plate (12) of the car seat frame facing the front fixing plate (11) of the car seat frame, or fixed to the side of the front fixing plate (11) of the car seat frame facing the rear fixing plate (12) of the car seat frame. The cylinder support (612) of the self-locking cylinder (61) faces to the right and is connected to the cylinder support connector (62), which is hinged to the cylinder support connector half shaft (621). The actuating cylinder support connecting head half shaft (621) is fixed to the front side of the end of the drive connecting rod plate (63) facing the leg bracket (2), and the end of the drive connecting rod plate (63) facing the leg bracket (2) is hinged to one end of the locking plate connecting rod (64) through the first hinge pin (631) of the drive connecting rod plate, while the end of the drive connecting rod plate (63) facing the hinge frame (61111) is hinged to the hinge frame (61111) through the second hinge pin (632) of the drive connecting rod plate. The other end of the locking plate connecting rod (64) is hinged to the right end of the locking plate (65) via the locking plate connecting rod hinge pin (641), while the left end of the locking plate (65) is fixedly connected to the downward-facing side of the drive beam (5); an actuating cylinder support connecting head hinge pin screw (6211) is screwed onto the front end face of the actuating cylinder support connecting head half shaft (621), and the actuating cylinder support connecting head (62) is hinged to the actuating cylinder support connecting head hinge pin screw (6211).

4. The non-powered self-locking car seat leg support device according to claim 3, characterized in that: The cylinder support (612) of the self-locking cylinder (61) is a gas spring support, a hydraulic damping column or an oil-gas damping column. The gas is nitrogen or compressed air, and the oil is a base oil, which is mineral hydraulic oil, synthetic hydrocarbon oil or silicone oil.

5. The non-powered self-locking car seat leg support device according to claim 2, characterized in that: The aforementioned front linkage mechanism (3) includes a front drive linkage (31), a front fixed plate hinge linkage (32), a first hinge linkage (33) of the leg support front trailing arm, and a second hinge linkage (34) of the leg support front trailing arm. The left end of the front drive linkage (31) is hinged to the upper right end of the front fixed plate (11) of the car seat frame via a left hinge pin (311). The front drive linkage (31) is positioned at the front end of the drive beam (5). The front drive link (31) is fixed to the front end of the drive beam (5) through the fixing hole (312) of the front drive link. The middle part of the front drive link (31) is hinged to the middle part of the first hinge link (33) of the front leg support through the middle hinge pin (313) of the front drive link. The right end of the front drive link (31) is hinged to one end of the second hinge link (34) of the front leg support through the right hinge pin (314) of the front drive link. The front fixed plate hinge link (32) is also connected. The left end of the front fixed plate hinge is hinged to the lower part of the front fixed plate (11) of the car seat frame via the left pin (321) of the front fixed plate hinge link, while the right end of the front fixed plate hinge link (32) is hinged to one end of the first hinge link (33) of the leg support front longitudinal arm via the right pin (322) of the front fixed plate hinge link. The other end of the first hinge link (33) of the leg support front longitudinal arm is connected to the front of the leg support bracket (2) via the pin (331) of the first hinge link of the leg support front longitudinal arm. The left end is hinged, and the other end of the second hinge link (34) of the front longitudinal arm of the leg support is hinged to the front middle of the leg support frame (2) through the pin (341) of the second hinge link of the front longitudinal arm of the leg support. A stop bar front fixing ear (342) is formed on the upward side of the middle of the second hinge link (34) of the front longitudinal arm of the leg support. A stop bar (7) is fixed between the stop bar front fixing ear (342) and the opposite side of the rear linkage mechanism (4).

6. The non-powered self-locking car seat leg support device according to claim 5, characterized in that: The rear linkage mechanism (4) includes a rear drive linkage (41), a rear fixed plate hinge linkage (42), a leg support rear longitudinal arm first hinge linkage (43), and a leg support rear longitudinal arm second hinge linkage (44). The left end of the rear drive linkage (41) is hinged to the upper right end of the rear fixed plate (12) of the car seat frame via a rear drive linkage left hinge pin (411). The rear drive linkage (41) is positioned at the rear end of the drive beam (5). The rear end of the drive beam (5) is fixed by the mounting hole (412) on the rear drive link. The middle part of the rear drive link (41) is hinged to the middle part of the first hinge link (43) of the rear longitudinal arm of the leg support by the middle hinge pin (413) of the rear drive link. The right end of the rear drive link (41) is hinged to one end of the second hinge link (44) of the rear longitudinal arm of the leg support by the right hinge pin (414) of the rear drive link. The rear fixed plate is hinged to the link (42). The left end of the rear fixed plate hinge is hinged to the lower part of the rear fixed plate (12) of the car seat frame via the left pin (421) of the rear fixed plate hinge link, while the right end of the rear fixed plate hinge link (42) is hinged to one end of the first hinge link (43) of the leg support rear longitudinal arm via the right pin (422) of the rear fixed plate hinge link. The other end of the first hinge link (43) of the leg support rear longitudinal arm is connected to the leg support bracket (2) via the pin (431) of the first hinge link of the leg support rear longitudinal arm. The other end of the second hinge link (44) of the rear longitudinal arm of the leg support is hinged to the middle of the rear side of the leg support frame (2) through the pin (441) of the second hinge link of the rear longitudinal arm of the leg support. A stop bar rear fixing ear (442) is formed on the upward side of the middle of the second hinge link (44) of the rear longitudinal arm of the leg support. The stop bar (7) is fixed between the front fixing ear (342) and the rear fixing ear (442) of the stop bar on opposite sides.

7. The non-powered self-locking car seat leg support device according to claim 6, characterized in that: The leg support (2) includes a left crossbeam (21), a right crossbeam (22), a front longitudinal beam (23), and a rear longitudinal beam (24). The first hinge pin (331) of the front longitudinal arm of the leg support is hinged to the left end of the front longitudinal beam (23), the first hinge pin (431) of the rear longitudinal arm of the leg support is hinged to the left end of the rear longitudinal beam (24), and the second hinge pin of the front longitudinal arm of the leg support... (341) is hinged to the front middle of the front longitudinal beam (23) of the bracket, and the second hinge link pin (441) of the rear longitudinal arm of the leg support is hinged to the rear middle of the rear longitudinal beam (24) of the bracket. The left crossbeam (21) and the right crossbeam (22) of the bracket are spaced apart from each other and parallel to each other on the left and right sides. The left crossbeam (21) and the right crossbeam (22) of the bracket are fixed between the front and rear longitudinal beams (23, 24) of the bracket on the side facing upward.

8. The non-powered self-locking car seat leg support device according to claim 7, characterized in that: A bracket reinforcing longitudinal beam (25) is fixed between the middle of the left and right crossbeams (21, 22) of the bracket along the length direction and facing downward.

9. The non-powered self-locking car seat leg support device according to claim 5, characterized in that: The cross-sectional shape of the front drive link (31) is shaped like the Chinese character "】", while the cross-sectional shape of the rear drive link (41) is shaped like the Chinese character "】".

10. A car seat, characterized in that: It has the non-powered self-locking car seat leg support device as described in claim 1.

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