Leg support extension protection mechanism

Abstract

The utility model discloses a leg support extension protection mechanism which comprises a seat basin support, an extension plate capable of moving back and forth is arranged on the upper side of the front end of the seat basin support and driven by a driving mechanism, the driving mechanism comprises a motor, a lead screw and a nut, the motor is installed on the seat basin support and connected with the lead screw in a transmission mode, and the lead screw is matched with the nut. The nut is installed on the extension plate, when the extension plate moves forwards, the tail end of the lead screw is exposed out of the surface of the extension plate, the shielding plate is arranged above the rear end of the extension plate in a covering mode, the two ends of the shielding plate cross the extension plate and are fixed to the seat basin support, a supporting column is arranged between the middle of the shielding plate and the seat basin support, and an avoiding groove allowing the supporting column to penetrate through is formed in the extension plate. The receding groove extends front and back, so that the extension plate can move forwards relative to the shielding plate, and after the extension plate moves forwards, the shielding plate can integrally shield the tail end of the lead screw. The problem that the tail end of the lead screw interferes with foaming of the cushion is solved, and the foaming of the cushion is prevented from being attached to or wound on the lead screw.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automobile seat, especially relates to a leg support extension protection mechanism. BACKGROUND

[0002] In the field of design and manufacture of automobile seats, as an important component to improve the comfort of passengers, the performance and structure optimization of leg support has always been the focus of the industry. The main function of the leg support is to provide support for the legs of passengers. By adjusting the extension length of the leg support, it can adapt to the leg length requirements of different passengers, thereby effectively relieving leg fatigue during long-distance travel and improving the overall riding experience.

[0003] At present, the traditional leg support extension mechanism usually adopts a driving system composed of a motor, a lead screw and a nut to realize the extension and contraction function of the leg support. Specifically, the motor is installed on the seat basin support and connected with the lead screw transmission, and the nut is installed on the extension plate which can move forward and backward. The lead screw and the nut cooperate with each other. When the motor operates, the extension plate moves forward and backward by the rotation of the lead screw, thereby realizing the extension and contraction of the leg support. However, this traditional leg support extension mechanism has many problems in actual use. When the extension plate moves forward, the end of the lead screw will be exposed on the surface of the extension plate. Because the passenger will exert downward pressure on the seat cushion when sitting, the seat cushion foam is easy to interfere with the exposed lead screw. The B surface of the seat cushion foam (i.e. the surface in contact with the lead screw) is easy to adhere or entangle on the lead screw, which not only affects the normal reset of the seat cushion foam, causes the shape of the seat cushion to change, affects the appearance and comfort of the seat, but also the passenger will feel obvious foreign body sensation during the ride, which greatly reduces the riding experience. In addition, the return problem of the nut also brings trouble to the traditional leg support extension mechanism. When the extension plate moves back to reset, the seat cushion foam adhered or entangled on the lead screw will hinder the nut, making it difficult for the nut to reset smoothly. In this case, the nut will squeeze the seat cushion foam, thereby producing abnormal noise, UTILITY MODEL CONTENTS

[0004] In view of the problems existing in the prior art, the utility model aims to provide a leg support extension protection mechanism to solve the problem of interference between the end of the lead screw and the seat cushion foam, avoid the seat cushion foam adhering or entangling on the lead screw, ensure the smooth reset of the nut, reduce the generation of abnormal noise, and improve the riding comfort of passengers.

[0005] In order to achieve the above object, the utility model provides a leg support extension protection mechanism, including the basin support of sitting, the front end upside of basin support of sitting is equipped with the extension plate that can move forward and backward, the extension plate is driven by drive mechanism, the drive mechanism includes motor, screw rod and nut, the motor is installed on the basin support of sitting, and the motor is connected with the screw rod transmission, the screw rod is matched with the nut, the nut is installed on the extension plate, when the extension plate moves forward, the screw rod end exposes the surface of extension plate, still include the baffle, the baffle cover is equipped with the rear end of extension plate above, and its both ends cross extension plate and are fixed on the basin support of sitting, and the middle part of baffle is equipped with the support column between the basin support of sitting, the extension plate is equipped with the avoiding slot that support column passes, the avoiding slot extends forward and backward, so that the extension plate can move forward to the baffle, when the extension plate moves forward, the baffle can shield the screw rod end as a whole.

[0006] In the above scheme: the extension plate is provided with a plurality of guide grooves, the basin support of sitting is fixed with a bolt corresponding to each guide groove, the bolt is slidingly limited in the corresponding guide groove, thereby realizing the sliding connection of the extension plate and the basin support of sitting, and this design provides an accurate guide path for the movement of the extension plate, ensuring the stability and accuracy of the leg support action.

[0007] In the above scheme: each of the left and right ends of the baffle is provided with a downwardly extending mounting column and a clamping column, the mounting column is fixed to the basin support of sitting through a screw, and the clamping column is clamped to the basin support of sitting. This unilateral double fixing mode greatly improves the connection strength between the baffle and the basin support of sitting.

[0008] In the above scheme: the rear end of the extension plate is inwardly contracted in an eight-shaped manner to form a contraction portion, and the corresponding mounting column and clamping column are respectively arranged on the left and right sides of the contraction portion. The contraction portion design makes the component layout more compact, fully utilizes the seat space, and avoids mutual interference.

[0009] In the above scheme: two support columns are arranged between the middle part of the baffle and the basin support of sitting, and the two support columns are arranged at intervals left and right. The two support columns can better ensure the support effect.

[0010] In the above scheme: a reinforcing plate is fixed to the top of the basin support of sitting corresponding to the extension plate, the bolt is fixed to the reinforcing plate through a locking nut, and the basin support of sitting is provided with an avoiding hole through which the bottom of the bolt passes. The reinforcing plate and the basin support of sitting are both provided with hollow holes corresponding in up and down directions, the motor is arranged in the hollow hole and fixed to the reinforcing plate. The reinforcing plate significantly enhances the structural strength of the corresponding area of the basin support of sitting, prevents the basin support of sitting from being deformed or damaged due to long-term stress, and thus ensures the stability and reliability of the leg support extension protection mechanism.

[0011] In the scheme, the front end of the elongated plate is covered with a shaping plate, the shaping plate is fixed with the elongated plate through screws, and the shaping plate and the elongated plate are separately arranged, so that the shaping plate can be designed and manufactured independently of the elongated plate, thereby facilitating matching of different shapes and selection of different materials.

[0012] The utility model discloses the beneficial effect is:

[0013] 1, by setting up the shielding board, after the elongated plate moves forward, the shielding board can shield the whole end of the screw rod, avoids the interference of the seat cushion foam and the end of the screw rod when riding, effectively prevent the B face of the seat cushion foam from adhering or winding on the screw rod, guarantee the normal reset of the seat cushion foam, maintains the aesthetic and comfort of the seat.2, due to the shielding effect of the shielding board on the end of the screw rod, the abnormal contact between the seat cushion foam and the screw rod is eliminated, so that when the elongated plate moves back, the nut will not produce abnormal sound due to the extrusion of the seat cushion foam adhering or winding on the screw rod, and the quietness of the vehicle interior environment is improved.3, the shielding board is fixed on the seat basin support through the elongated plate at both ends, and a support column is arranged between the middle part and the seat basin support, and the elongated plate is provided with front and rear extension avoiding grooves for the support column to pass through, and the structure design ensures the stability of the shielding board and ensures that the elongated plate can smoothly move forward relative to the shielding board, and the overall structure is reasonable and reliable. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the main structure schematic diagram of the utility model.

[0015] Figure 2 It is the overall structure schematic diagram of the utility model.

[0016] Figure 3 It is Figure 2 The explosion schematic diagram of.

[0017] Figure 4 It is the structure schematic diagram of the shielding board. CONCRETE IMPLEMENTATION

[0018] As Figure 1 -4 shows, a leg support elongation protection mechanism mainly consists of a seat basin support 1 and a shielding board 6.

[0019] The front end of the seat basin support 1 is provided with an elongated plate 2 that can move forward and backward, the elongated plate 2 is driven by a driving mechanism, the driving mechanism includes a motor 3, a screw rod 4 and a nut 5, the motor 3 is installed on the seat basin support 1, the motor 3 is in transmission connection with the screw rod 4, the screw rod 4 is matched with the nut 5, and the nut 5 is installed on the elongated plate 2.

[0020] When the elongated plate 2 moves forward, the end of the screw rod 4 is exposed on the surface of the elongated plate 2.

[0021] The shielding plate 6 is arranged above the rear end of the elongated plate 2, and the two ends thereof are arranged beyond the elongated plate 2 and fixed to the seat support 1, and a support column 61 is arranged between the middle part of the shielding plate 6 and the seat support 1, and an avoiding groove 21 is arranged on the elongated plate 2 for the support column 61 to pass through, and the avoiding groove 21 extends forward and backward, so that the elongated plate 2 can move forward relative to the shielding plate 6. When the elongated plate 2 moves forward, the shielding plate 6 can shield the end of the lead screw 4 as a whole.

[0022] Preferably, a plurality of guide grooves 22 are arranged on the elongated plate 2, and a bolt 7 is fixed to the seat support 1 at a position corresponding to each guide groove 22, and the bolt 7 is slidingly limited in the corresponding guide groove 22, so as to realize the sliding connection between the elongated plate 2 and the seat support 1. This design provides an accurate guide path for the movement of the elongated plate 2, and ensures the stability and accuracy of the leg support action.

[0023] Preferably, each of the left and right ends of the shielding plate 6 is provided with a downwardly extending mounting column 62 and a clamping column 63, the mounting column 62 is fixed to the seat support 1 by screws, and the clamping column 63 is clamped to the seat support 1. This single-sided double fixing mode greatly improves the connection strength between the shielding plate 6 and the seat support 1.

[0024] Preferably, the rear end of the elongated plate 2 is inwardly splayed to form a splayed part, and the corresponding mounting column 62 and clamping column 63 are arranged on the left and right sides of the splayed part, respectively. The splayed part design makes the component layout more compact, fully utilizes the seat space, and avoids mutual interference.

[0025] Preferably, two support columns 61 are arranged between the middle part of the shielding plate 6 and the seat support 1, and the two support columns 61 are arranged at intervals left and right. The two support columns 61 can better ensure the support effect.

[0026] Preferably, a reinforcing plate 8 is fixed to the top of the seat support 1 at a position corresponding to the elongated plate 2, the bolt 7 is fixed to the reinforcing plate 8 by a locking nut, and the seat support 1 is provided with an avoiding hole for the bottom of the bolt 7 to pass through, and the reinforcing plate 8 and the seat support 1 are both provided with hollow holes 9 arranged in correspondence and up and down, the motor 3 is arranged in the hollow hole 9 and fixed to the reinforcing plate 8. The reinforcing plate 8 significantly enhances the structural strength of the corresponding area of the seat support 1, prevents the seat support 1 from being deformed or damaged due to long-term stress, and thus ensures the stability and reliability of the leg support elongation protection mechanism.

[0027] Preferably, the front end of the elongated plate 2 is covered with a shaped plate 10, and the shaped plate 10 is fixed to the elongated plate 2 by screws. The shaped plate 10 and the elongated plate 2 are separately arranged, so that the shaped plate 10 can be designed and manufactured independently of the elongated plate 2, to facilitate its matching with different shapes and selection of different materials.

Claims

1. A leg support extension protection mechanism, comprising a seat pan support (1), a front end upper side of the seat pan support (1) is provided with a front and back movable extension plate (2), the extension plate (2) is driven by a driving mechanism, the driving mechanism comprises a motor (3), a lead screw (4) and a nut (5), the motor (3) is installed on the seat pan support (1), the motor (3) is in transmission connection with the lead screw (4), the lead screw (4) is matched with the nut (5), the nut (5) is installed on the extension plate (2), when the extension plate (2) moves forward, the end of the lead screw (4) exposes the surface of the extension plate (2), characterized in that: The shielding plate (6) is arranged above the rear end of the elongated plate (2), and both ends of the shielding plate (6) are arranged beyond the elongated plate (2) and fixed on the seat pan support (1), and a support column (61) is arranged between the middle part of the shielding plate (6) and the seat pan support (1), an avoiding groove (21) is arranged on the elongated plate (2) for the support column (61) to pass through, the avoiding groove (21) extends forward and backward, so that the elongated plate (2) can move forward relative to the shielding plate (6), and when the elongated plate (2) moves forward, the shielding plate (6) can shield the whole end of the lead screw (4). ​ 2. The leg rest elongation protection mechanism of claim 1, wherein: A plurality of guide grooves (22) are arranged on the elongated plate (2), and a bolt (7) is fixed on the seat pan support (1) corresponding to each guide groove (22), and the bolt (7) is slidingly limited in the corresponding guide groove (22), so as to realize the sliding connection between the elongated plate (2) and the seat pan support (1).

3. The leg rest elongation protection mechanism of claim 2, wherein: Each of the left and right ends of the shielding plate (6) is provided with a downwardly extending mounting column (62) and a clamping column (63), the mounting column (62) is fixed to the seat pan support (1) by a screw, and the clamping column (63) is clamped on the seat pan support (1).

4. The leg rest elongation protection mechanism of claim 3, wherein: The rear end of the elongated plate (2) is inwardly contracted in an eight-shaped manner to form a contraction part, and the corresponding mounting column (62) and clamping column (63) are arranged on the left and right sides of the contraction part, respectively.

5. The leg rest elongation protection mechanism of claim 1, wherein: Two support columns (61) are arranged between the middle part of the shielding plate (6) and the seat pan support (1), and the two support columns (61) are arranged at intervals left and right.

6. The leg rest extension protection mechanism of claim 2, wherein: A reinforcing plate (8) is fixed on the top of the seat pan support (1) corresponding to the elongated plate (2), the bolt (7) is fixed on the reinforcing plate (8) by a locking nut, and the seat pan support (1) is provided with an avoiding hole for the bottom of the bolt (7) to pass through, the reinforcing plate (8) and the seat pan support (1) are both provided with a hollow hole (9) corresponding to the up and down, the motor (3) is arranged in the hollow hole (9) and fixed on the reinforcing plate (8).

7. The leg rest elongation protection mechanism of claim 1, wherein: The front end of the elongated plate (2) is covered with a plastic plate (10), and the plastic plate (10) is fixed with the elongated plate (2) by a screw.

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