A seat frame structure that facilitates passengers to enter the rear row

Abstract

The present invention relates to a seat frame structure that facilitates passengers to enter the rear row, belonging to the field of vehicle parts structure. The seat frame structure includes a frame mounting plate, a locking plate, a first return spring, a mounting bracket, a slide rail, a locking pin, and a fixed-point unlocking structure. The frame mounting plate can rotate relative to the mounting bracket. The mounting bracket can translate along the lower slide rail. A guide groove is provided on the frame mounting plate. The guide groove is an L-shaped structure consisting of a vertical arc groove and a transverse arc groove. The junction of the vertical arc groove and the transverse arc groove is an unlocking portion, and the transverse arc groove is a locking portion. The bottom end of the frame mounting plate is connected to the locking plate via a first return spring. The locking pin passes through the upper side of the locking plate and the mounting bracket and is inserted into the guide groove. When the frame mounting plate flips, the locking pin moves along the vertical arc groove and enters the locking portion to lock the flipped position. When the mounting bracket translates backward, the fixed-point unlocking structure toggles the locking plate, and the locking pin translates along the transverse arc groove. The locking of the present invention is stable and has little shaking, thus avoiding abnormal noise caused by shaking.

Description

Technical Field

[0001] The invention relates to a seat structure, in particular to a seat frame structure which facilitates passengers to enter the rear row, and belongs to the field of vehicle part structures. Background Art

[0002] At present, the seat frame structure that facilitates passengers to enter the back row of the car is complex and has poor stability. There is a large gap between the seats after they are turned over. Figure 1 As shown, when the backrest bracket 1' rotates counterclockwise, the connecting rod 2' and the connecting rod 3' are straightened to form a dead point. The gap between the two is large, and the dead point failure is likely to occur during use and the open state cannot be maintained. In addition, abnormal noise is likely to occur during operation of the vehicle. Summary of the Invention

[0003] In order to solve the problems of poor structural stability and large shaking gap of automobile seats in the above-mentioned prior art, the present invention provides a seat frame structure that facilitates passengers to enter the back row. The structure is simple, the locking is stable, and the seat shakes little.

[0004] To achieve the above purpose, the specific technical solutions of the present invention are as follows:

[0005] A seat frame structure that facilitates passengers to enter the rear row, the seat frame structure comprising a frame mounting plate, a locking plate, a first return spring, a mounting bracket, a slide rail, a locking pin, and a fixed-point unlocking structure;

[0006] The bottom end of the skeleton mounting plate is connected to the mounting bracket, and the skeleton mounting plate can rotate relative to the mounting bracket; the mounting bracket is installed on the upper slide rail of the slide rail and can translate along the lower slide rail of the slide rail;

[0007] The skeleton mounting plate is provided with a guide groove, which is an L-shaped structure consisting of a vertical arc groove and a transverse arc groove. The junction of the vertical arc groove and the transverse arc groove is an unlocking portion, and the transverse arc groove is a locking portion; the locking plate is placed on the side of the mounting bracket, and the bottom end of the skeleton mounting plate is connected to the locking plate via the first return spring; the locking pin passes through the upper side of the locking plate and the mounting bracket and is inserted into the guide groove; the fixed-point unlocking structure is installed on the lower rail of the slide rail and is located at the bottom end of the locking plate;

[0008] When the skeleton mounting plate flips over, the first return spring is stretched to drive the locking plate to rotate relative to the mounting bracket, and the locking plate drives the locking pin to move along the vertical arc groove of the guide groove, and the locking pin enters the locking portion to lock the skeleton mounting plate in a flipped posture; when the mounting bracket translates backward along the slide rail, the fixed-point unlocking structure moves the locking plate, and the locking pin translates along the transverse arc groove of the guide groove.

[0009] Furthermore, the fixed-point unlocking structure includes a shift block, a mounting plate and a rotating pin; the mounting plate includes a flat plate and a side plate vertically upward along one end of the flat plate; the flat plate is installed on the lower slide rail; the shift block is installed at the upper center of the side plate through the rotating pin, and the shift block rotates around the rotating pin when the locking plate is shifted; the upper and lower ends of the shift block are respectively higher than the ends of the mounting plate.

[0010] Furthermore, a second return spring is sleeved on the rotating pin between the shift block and the side plate, and two ends of the second return spring are connected to the shift block and the side plate respectively.

[0011] Furthermore, the rotating sleeve is installed at the center of the area where the upper end of the shift block is higher than the side plate through a shift pin.

[0012] Furthermore, the bottom end of the locking plate is an inclined surface inclined upward from front to back; the side of the shift block farther from the mounting plate is L-shaped, the corner of the side is an arc-shaped corner, and the side is used to contact the bottom end of the locking plate.

[0013] Furthermore, a side of the flat plate of the mounting plate close to the side plate is a concave structure.

[0014] Furthermore, the mounting bracket consists of a mounting bracket body and a guard plate, and there is a mounting gap between the mounting bracket body and the guard plate; the bottom end connecting part of the skeleton mounting plate is inserted into the mounting gap and connected to the mounting bracket body; the mounting bracket body is installed on the upper slide rail.

[0015] Furthermore, the guard plate is provided with a transverse groove corresponding to the transverse arc groove; the guide groove is arranged on the connecting portion; the locking plate is placed on the outside of the guard plate, and the lower side of the locking plate is connected to the guard plate bolt; the locking pin passes through the locking plate and the transverse groove in sequence and is inserted into the guide groove, and the locking pin is connected to the locking plate.

[0016] Furthermore, the two mounting brackets are symmetrically placed on both sides of the skeleton mounting plate; the bottom end of the skeleton mounting plate is a U-shaped structure, both sides of the U-shaped structure are the connecting parts, and the connecting parts are placed in the mounting gap.

[0017] Furthermore, the guide grooves are respectively provided on the connecting parts on both sides of the skeleton mounting plate, and the two locking pins are respectively inserted into the guide grooves through the locking plate and the guard plate on both sides of the skeleton mounting plate; the locking pins are connected to the locking plate.

[0018] Beneficial effects of the present invention:

[0019] The seat frame structure of the present invention is simple and stable, effectively reduces the difficulty of the manufacturing process, has a low manufacturing cost, and is stable in locking, thereby solving the problem of large seat shaking and reducing seat shaking.

[0020] The invention effectively locks the lock pin, allowing the seat to maintain a locked position after flipping, with high stability. After being locked by the lock pin, the invention can also unlock the seat through a fixed-point unlocking structure, allowing the seat to be unlocked and flipped at a specified position, allowing the seat to return to its initial locked state.

[0021] The guide groove of the present invention is L-shaped, and the locking part is arranged in the transverse arc groove, which can avoid the formation of a dead point after flipping, so that it can maintain an open state while being stably locked, solving the problem of dead point failure.

[0022] The present invention utilizes the resilience of the return spring to reset the frame mounting plate and the shift block, while also reducing the shaking clearance of components in the seat frame structure, thereby avoiding abnormal noise caused by shaking during vehicle driving.

[0023] The fixed-point unlocking structure of the present invention has a small size, light weight, and requires little layout space, which can greatly reduce occupied space. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the seat frame structure that allows passengers to enter the back row in the prior art;

[0025] Figure 2 This is a schematic diagram of the overall structure of the seat frame structure for facilitating passengers entering the rear row of the seat;

[0026] Figure 3 This is a schematic diagram of the bottom connecting plate of the skeleton mounting plate in the present invention;

[0027] Figure 4 It is a schematic diagram of the locking structure in the present invention.

[0028] Figure 5 This is a schematic diagram of the seat flipping of the present invention.

[0029] Among them: 1'-backrest bracket, 2'-connecting rod, 3'-connecting rod, 1-skeleton mounting plate, 1.1-guide groove, 1.2-first mounting hole, 2-locking plate, 3-first return spring, 4-mounting bracket, 4.1-mounting bracket body, 4.2-guard plate, 5-slide rail, 6-dial pin, 7-second return spring, 8-dial block, 9-mounting plate, 10-rotation pin, 11-locking pin, 12-step bolt, 13-nut, 14-rotation sleeve. DETAILED DESCRIPTION

[0030] In order to enable those skilled in the art to better understand the technical solution of the present application, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0031] The terms "up", "down", "left", "right", "front", and "back" in this application are based on the positional relationships shown in the accompanying drawings. The corresponding positional relationships may vary depending on the drawings, and should not be construed as limiting the scope of protection.

[0032] In the present invention, the terms "installed," "connected," "connected," "connected," "fixed," etc. should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, integral connection, mechanical connection, electrical connection, or mutual communication. They may be directly connected or indirectly connected through an intermediate medium. They may refer to internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0033] Example 1

[0034] This embodiment describes a seat frame structure that facilitates passengers to enter the rear row, such as Figure 2 As shown, the seat frame structure includes a frame mounting plate 1, a locking plate 2, a first return spring 3, a mounting bracket 4, a slide rail 5, and a fixed-point unlocking structure. In this embodiment, the left and right ends of the horizontally arranged slide rail 5 are used as the front and rear of the seat.

[0035] The bottom end of the frame mounting plate 1 is a U-shaped structure, with connecting parts on both sides of the U-shaped structure. One connecting part is directly mounted on the upper rail of the slide rail 5, and the other connecting part is mounted on the upper rail of the slide rail 5 via the mounting bracket 4. The frame mounting plate 1 is tilted backward to meet the passenger's riding comfort requirements. The mounting bracket 4 is an upwardly open U-shaped plate structure, consisting of a mounting bracket body 4.1 and a guard plate 4.2. The outer plate of the mounting bracket body 4.1 has a notch, forming a short side plate known as the guard plate 4.2. The bottom end of the mounting bracket body 4.1 is mounted on the upper rail of the slide rail 5. A mounting gap for the frame mounting plate 1 is formed between the mounting bracket body 4.1 and the guard plate 4.2. The connecting part on one side of the bottom end of the frame mounting plate 1 is placed within the mounting gap.

[0036] like Figure 3As shown, the connection between the frame mounting plate 1 and the mounting bracket 4 has a reinforced area surrounded by reinforcing ribs corresponding to the position of the guard plate 4.2. A guide groove 1.1 is provided within the reinforced area, and a first mounting hole 1.2 is provided at the center of the bottom end of the connection. In this embodiment, the guide groove 1.1 has a predetermined curvature and is L-shaped. The vertical arc groove represents the seat's tilting range, the junction of the vertical arc groove and the transverse arc groove forms the unlocking portion, and the transverse arc groove serves as the locking portion. The transverse arc groove simultaneously locks and guides the seat's movement along the guide rail 5, maintaining a stable locking state while maintaining the seat's open position, thus resolving the issue of dead point failure. Parameters such as the curvature and arc length of the vertical and transverse arc grooves can be calculated based on the seat's tilting trajectory. The guard plate 4.2 is provided with a transverse groove and a second mounting hole arranged vertically, and the transverse groove corresponds to the transverse arc groove position of the guide groove 1.1. Preferably, the vertical arc groove travel angle of the guide groove 1.1 is 30°~50°, which can make the seat flip 30°~50°. This angle can meet the space requirements of passengers getting on and off the vehicle, and save the seat flipping and moving process. The groove width of the horizontal arc groove and the vertical arc groove is designed according to the outer diameter of the locking pin 11, so that it can be completely locked to ensure that the seat flips in a predetermined posture without generating resistance to the locking pin 11.

[0037] The skeleton mounting plate 1 is connected to the mounting bracket body 4.1 of the mounting bracket 4 by means of a step bolt 12 passing through the first mounting hole 1.2 and is locked by means of a nut 13. The locking plate 2 is placed on the outside of the guard plate 4.2, and the locking plate 2 has through holes corresponding to the transverse groove and the second mounting hole on the guard plate 4.2. The locking plate 2 is connected to the guard plate 4.2 by means of a combination of the step bolt 12, the second mounting hole, the through hole and the nut 13, and the locking plate 2 can rotate relative to the guard plate 4.2 around the step bolt 12. The locking pin 11 passes through the through hole and the transverse groove on the locking plate 2 in sequence and is inserted into the guide groove 1.1 to realize the flipping guide of the skeleton mounting plate 1, and the outer end of the locking pin 11 is connected to the locking plate 2. The connection method can be threaded connection, welding connection, riveting, etc. to prevent the locking pin 11 from falling off.

[0038] In this embodiment, the bottom end of the locking plate 2 is an inclined surface sloping upward from front to rear. The bottom end of the locking plate 2 is lower than the bottom end of the guard plate 4.2 and is placed above the upper slide rail side of the slide rail 5 and above the fixed-point unlocking structure. It is used to collide and cooperate with the fixed-point unlocking structure when the seat moves forward and backward to achieve the unlocking action.

[0039] When the frame mounting plate 1 rotates around the step bolt 12, the locking pin 11 moves along the guide groove 1.1 to realize the flipping guidance of the frame mounting plate 1 until the locking pin 11 enters the locking portion in the guide groove 1.1. This embodiment utilizes the effective locking of the locking pin 11 to reduce the rocking clearance of the seat.

[0040] Slide rail 5 is made up of upper slide rail and lower slide rail, and upper slide rail can slide on lower slide rail. Mounting bracket 4 bottom front ends are installed on the upper slide rail by bolts, and lower slide rail is fixedly installed on the crossbeam and the floor of vehicle.

[0041] The front end of the lower side of the mounting bracket 4 is connected to the locking plate 2 through the first return spring 3, forming a return locking force for the locking plate 2. Under the action of the rebound force of the first return spring 3, the locking of the locking plate 2 can be achieved, and at the same time, it can also prevent abnormal noise caused by the shaking of the seat during driving of the vehicle.

[0042] The first return spring 3 is secured by a hook at its end that engages a connection hole at the front end of the locking plate 2. The first return spring 3 is always in an extended state. When the passenger flips the seat, the first return spring 3 is gradually extended from its extended state. The frame mounting plate 1 gradually tilts upward, and the locking plate 2, under the action of the first return spring 3, enters the locked position, achieving locking.

[0043] Driven by the first return spring 3, the locking plate 2 rotates counterclockwise, moving the locking pin 11 downward along the vertical arc of the guide slot 1.1. The force of the first return spring 3 prevents the locking pin 11 from rebounding upward. When the locking pin 11 enters the transverse arc, the locking plate 2 is locked into the locked position. The seat frame structure is automatically locked by the first return spring 3, preventing it from tilting back and preventing the seat from shaking and causing unusual noise.

[0044] The fixed-point unlocking structure is used to unlock the seat, so that the seat can switch between translation and flip state, such as Figure 4 As shown, the fixed-point unlocking structure includes a toggle pin 6 , a second return spring 7 , a toggle block 8 , a mounting plate 9 , a rotating pin 10 and a rotating sleeve 14 .

[0045] The mounting plate 9 comprises a flat plate with a recessed side and a side plate extending vertically upward along the end of the recessed area, with the side plate having a trapezoidal structure. The mounting plate 9 is riveted to the lower lower rail of the slide rail 5 using the unrecessed side of the flat plate. The shift block 8 is riveted to the center of the upper side plate of the mounting plate 9 via a rotating pin 10. A second return spring 7 is sleeved on the rotating pin 10 between the shift block 8 and the side plate, connecting the shift block 8 and the mounting plate 9. The rebound force of the second return spring 7 allows the shift block 8 to reset, while also preventing unusual noises caused by the shift block 8 shaking during vehicle operation. In this embodiment, the recessed area on the mounting plate 9 prevents the second return spring 7 from damaging the mounting plate 9 when the shift block 8 rotates.

[0046] In this embodiment, the upper and lower ends of the shift block 8 are respectively higher than the ends of the mounting plate 9. The height of its upper end matches the bottom end of the locking plate 2 to facilitate the movement between the locking plate 2 and the shift block 8. When the lower end of the shift block 8 abuts the rear end of the mounting plate 9, the shift block 8 is held in a vertical position. The side of the shift block 8 farther from the mounting plate 9 is L-shaped. When the locking plate 2 and the shift block 8 are moved relative to each other, this side connects with the locking plate 2. The angle of rotation is a certain arc, which reduces the resistance when the locking plate 2 moves the shift block 8. A rotating sleeve 14 is riveted to the center of the area where the upper end of the shift block 8 is higher than the side plate via the shift pin 6. When the locking plate 2 and the shift block 8 are moved relative to each other, the rotating sleeve 14 converts static friction into rotational friction, unlocking the friction and reducing wear.

[0047] like Figure 5 As shown, when a passenger drives the frame mounting plate 1 to rotate counterclockwise around the stepped bolt 12, the first return spring 3 is stretched, and the locking plate 2 rotates counterclockwise around the stepped bolt 12 under the force of the first return spring 3. The locking plate 2 drives the locking pin 11 downward along the vertical arc groove of the guide groove 1.1. When the locking plate 2 and the shift block 8 abut, the locking pin 11 enters the unlocking portion of the guide groove 1.1, allowing the seat to maintain the forward flip position. At this time, when the seat further moves forward, the locking pin 11 moves along the transverse groove and transverse arc groove, and the locking plate 2 shifts the shift block 8 to rotate it counterclockwise, allowing the seat to continue sliding forward, further increasing the space for rear passengers to enter and exit. When the passenger moves the seat backward, the shift block 8 contacts the locking plate 2, rotating it. Once the locking plate 2 disengages the shift block 8, the frame mounting plate 1 rotates clockwise. This causes the locking pin 11 to enter the vertical arc of the frame mounting plate's guide slot 1.1, disengaging the lock. The first return spring 3 resets, and the frame mounting plate 1 rotates clockwise back to the ready-to-sit position. As the seat translates forward and backward, the locking pin 11 follows the transverse slot of the guard plate 4.2 and the transverse arc of the guide slot 1.1, ensuring smooth movement.

[0048] Example 2

[0049] This embodiment describes a seat frame structure that facilitates rear passenger access. It is essentially the same as the seat frame structure described in Example 1, differing in that the connecting portions on either side of the frame mounting plate 1 are mounted to the upper rails via mounting brackets 4. Locking plates 2 are provided on the outer sides of the side guard plates 4. Guide grooves 1.1 are provided on the connecting portions on either side of the frame mounting plate 1. Two locking pins 11 pass through the locking plates 2 and transverse grooves on either side of the frame mounting plate 1 and are inserted into the guide grooves 1.1. Simultaneously, the two locking plates 2 cooperate with fixed-point unlocking mechanisms to further ensure the smoothness of the seat structure's flipping motion.

[0050] Although the principles of the present invention have been described in detail above in conjunction with the preferred embodiments of the present invention, those skilled in the art should understand that the above embodiments are merely illustrative of the present invention and are not intended to limit the scope of the present invention. The details in the embodiments do not constitute a limitation on the scope of the present invention. Without departing from the spirit and scope of the present invention, any obvious changes such as equivalent transformations and simple substitutions based on the technical solution of the present invention fall within the scope of protection of the present invention.

Claims

1. A seat frame structure that facilitates passengers to enter the rear row, characterized in that: The seat frame structure comprises a frame mounting plate (1), a locking plate (2), a first return spring (3), a mounting bracket (4), a slide rail (5), a locking pin (11) and a fixed-point unlocking structure; The bottom end of the skeleton mounting plate (1) is connected to the mounting bracket (4), and the skeleton mounting plate (1) can rotate relative to the mounting bracket (4); the mounting bracket (4) is mounted on the upper slide rail of the slide rail (5) and can translate along the lower slide rail of the slide rail (5); The skeleton mounting plate (1) is provided with a guide groove (1.1), and the guide groove (1.1) is an L-shaped structure composed of a vertical arc groove and a transverse arc groove, the junction of the vertical arc groove and the transverse arc groove is an unlocking part, and the transverse arc groove is a locking part; the locking plate (2) is placed on the side of the mounting bracket (4), and the bottom end of the skeleton mounting plate (1) is connected to the locking plate (2) through the first return spring (3); the locking pin (11) passes through the upper side of the locking plate (2) and the mounting bracket (4) and is inserted into the guide groove (1.1); the fixed-point unlocking structure is installed on the lower rail of the slide rail (5) and is located at the bottom end of the locking plate (2); When the skeleton mounting plate (1) flips over, the first return spring (3) is stretched to drive the locking plate (2) to rotate relative to the mounting bracket (4), and the locking plate (2) drives the locking pin (11) to move along the vertical arc groove of the guide groove (1.1), and the locking pin (11) enters the locking portion to lock the skeleton mounting plate (1) in a flipped posture; when the mounting bracket (4) moves backward along the slide rail (5), the fixed-point unlocking structure moves the locking plate (2), and the locking pin (11) moves along the horizontal arc groove of the guide groove (1.1).

2. The seat frame structure for facilitating passengers to enter the rear row according to claim 1, characterized in that: The fixed-point unlocking structure comprises a shift block (8), a mounting plate (9) and a rotating pin (10); the mounting plate (9) comprises a flat plate and a side plate extending vertically upward along one end of the flat plate; the flat plate is mounted on the lower slide rail; the shift block (8) is mounted at the upper center of the side plate via the rotating pin (10), and the shift block (8) rotates around the rotating pin (10) when the locking plate (2) is shifted; the upper and lower ends of the shift block (8) are respectively higher than the ends of the mounting plate (9).

3. The seat frame structure for facilitating passengers to enter the rear row according to claim 2, characterized in that: A second return spring (7) is sleeved on the rotating pin (10) between the shift block (8) and the side plate, and two ends of the second return spring (7) are respectively connected to the shift block (8) and the side plate.

4. The seat frame structure for facilitating passengers' entry into the rear row according to claim 2, characterized in that: The rotating sleeve (14) is installed at the center of the area where the upper end of the shifting block (8) is higher than the side plate through the shifting pin (6).

5. The seat frame structure for facilitating passengers to enter the rear row according to claim 2, characterized in that: The bottom end of the locking plate (2) is an inclined surface that tilts upward from front to back; the side of the shift block (8) that is farther from the mounting plate (9) is L-shaped, and the corner of the side is an arc corner, and the side is used to contact the bottom end of the locking plate (2).

6. The seat frame structure for facilitating passengers to enter the rear row according to claim 2, characterized in that: The side of the flat plate of the mounting plate (9) close to the side plate is a concave structure.

7. The seat frame structure for facilitating passengers' entry into the rear row according to claim 1, characterized in that: The mounting bracket (4) is composed of a mounting bracket body (4.1) and a guard plate (4.2); a mounting gap is provided between the mounting bracket body (4.1) and the guard plate (4.2); a bottom end connecting portion of the skeleton mounting plate (1) is inserted into the mounting gap and connected to the mounting bracket body (4.1); and the mounting bracket body (4.1) is mounted on the upper slide rail.

8. The seat frame structure for facilitating passengers' entry into the rear row according to claim 7, characterized in that: The guard plate (4.2) is provided with a transverse groove corresponding to the transverse arc groove; the guide groove (1.1) is provided on the connecting portion; the locking plate (2) is placed outside the guard plate (4.2), and the lower side of the locking plate (2) is bolted to the guard plate (4.2); the locking pin (11) passes through the locking plate (2) and the transverse groove in sequence and is then inserted into the guide groove (1.1), and the locking pin (11) is connected to the locking plate (2).

9. The seat frame structure for facilitating passengers' entry into the rear row according to claim 7, characterized in that: The two mounting brackets (4) are symmetrically placed on both sides of the skeleton mounting plate (1); the bottom end of the skeleton mounting plate (1) is a U-shaped structure, and both sides of the U-shaped structure are the connecting parts, and the connecting parts are placed in the mounting gap.

10. The seat frame structure for facilitating passengers entering the rear row according to claim 9, characterized in that: The guide grooves (1.1) are respectively provided on the connecting portions on both sides of the frame mounting plate (1); the two locking pins (11) respectively pass through the locking plate (2) and the guard plate (4.2) on both sides of the frame mounting plate (1) and are inserted into the guide grooves (1.1); the locking pins (11) are connected to the locking plate (2).

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