Vehicle seat access device

Abstract

A vehicle seat entry device includes: a rear link, one end of which is connected to a seat cushion frame through a first hinge shaft and the other end of which is connected to an upper rail through a second hinge shaft, the rear link being rotatable about the second hinge shaft in an unlocking direction; and an unlocking device that operates in conjunction with the rotational operation of the rear link, and that completes an unlocked state by pressing a lock pin by the interlocking operation of a plurality of links.

Description

Technical Field

[0001] The invention relates to a vehicle seat entry device. Background Art

[0002] Generally, in a recreational vehicle (RV) or a three-door vehicle, a vehicle seat entry device for performing an entry function may be installed on the front seats to facilitate passengers in the rear seats to get on and off the vehicle.

[0003] The walk-in function is a function in which when a passenger in the rear seat operates the walk-in switch of the front seat, the seat backrest folds forward at a predetermined angle and the front seat slides forward by a predetermined distance. The walk-in function can ensure space between the front and rear seats, and passengers can get on and off the vehicle through the ensured space.

[0004] In the existing vehicle seat entry device, when the passenger operates the entry switch, the constraint of the rear link can be released. When the constraint of the rear link is released, the rear link elastically supported by the elastic member can rotate by the elastic restoring force of the elastic member. The locking pin can be pressed by the operation of the rear link to achieve unlocking. As a result, the upper rail can move along the lower rail.

[0005] However, in the existing vehicle seat entry apparatus, when the rear link is operated, the lock pin is not completely unlocked by the pressing of the pressurizing bracket, and therefore, the upper rail cannot move smoothly along the lower rail or friction noise may be generated due to friction between parts.

[0006] Prior art documents

[0007] Patent Documents

[0008] (Patent Document 1) Korean Patent Gazette No. 10-2446336 (published on September 22, 2022)

[0009] (Patent Document 2) Korean Patent Publication No. 10-2022-0143298 (published on October 25, 2022) Summary of the invention

[0010] In order to solve the above problems, an object of the present invention is to provide a vehicle seat entry device, which can achieve a fully unlocked state by pressing a locking pin through an unlocking device of a link connection structure that operates in conjunction with a rear link.

[0011] In order to achieve the above-mentioned purpose, the present invention provides a vehicle seat entry device, which includes: a rear connecting rod, one end of which is connected to a seat cushion frame through a first hinge shaft, and the other end of which is connected to an upper guide rail through a second hinge shaft, and the rear connecting rod can rotate in an unlocking direction around the second hinge shaft; and an unlocking device, which is linked to the rotation of the rear connecting rod and presses a locking pin through the linked action of a plurality of connecting rods to complete the unlocking state.

[0012] Moreover, the unlocking device may include: a first link, one end of which is connected to the other end of the rear link via a third hinge shaft; a second link, one end of which is connected to the other end of the first link, and the other end is connected to the upper guide rail via a fourth hinge shaft; and a pressure bracket, which is elastically supported by a first elastic component, is pressed by the second link that moves in conjunction with the first link, and presses the locking pin while rotating in the unlocking direction.

[0013] Moreover, the pressure bracket may include: an external connection groove, which is assembled to be externally connected to the fifth hinge axis connected to the upper guide rail; and a pressure portion, which is spaced apart from the external connection groove and extends in the direction of the locking pin, and presses the locking pin by pressing the second connecting rod.

[0014] Furthermore, the pressurizing portion may be exposed through a through window of the upper rail so as to be able to press the second link.

[0015] Furthermore, the upper end of the locking pin may be exposed from the upper portion of the upper guide rail, and when the upper end of the locking pin is pressed downward by the pressurizing bracket, the locking plate below the locking pin disengages from the locking groove of the lower guide rail to release the locked state.

[0016] Moreover, it may be that when the rear link rotates in the unlocking direction and the second hinge shaft, the third hinge shaft and the first link are located in a straight line, the maximum pressing state of the locking pin is achieved by the pressure bracket, thereby achieving complete disengagement of the locking plate from the locking groove of the lower guide rail.

[0017] Furthermore, the fifth hinge shaft may be coupled to a first elastic member, and the first elastic member may elastically support the pressurizing bracket.

[0018] Furthermore, the outer diameter portion of one side end portion of the rear link may be provided with a gear portion, and when a constraint gear of a constraint device is meshed with the gear portion, the constraint state of the rear link is realized, and when the constraint device is released, the meshing of the gear portion and the constraint gear is released, and at the same time, the rear link rotates in an unlocking direction around the second hinge axis through a rotating device that elastically supports the rear link.

[0019] Furthermore, a front link may be provided at a distance from the rear link, and one end of the front link may be connected to the seat cushion frame, and the other end of the front link may be connected to the upper rail.

[0020] Furthermore, it may be that a portion of the locking pin located inside the upper guide rail is elastically supported by a second elastic member, and the second elastic member is compressed when the locking pin is lowered, and then, when the pressure of the pressurizing bracket disappears from the locking pin, the second elastic member stretches, returning the locking pin to its original position.

[0021] In the present invention, the fully unlocked state can be achieved by pressing the locking pin through the unlocking device of the link connection structure that moves in conjunction with the rear link. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 1 is a diagram showing the overall structure of a vehicle seat entry device according to a preferred embodiment of the present invention.

[0023] Figure 2 1 is a diagram showing a restrained state of a rear link according to a preferred embodiment of the present invention.

[0024] Figure 3 1 is a diagram showing a maximum pressing state of the lock pin by the unlocking device when the constraint of the rear link is released according to a preferred embodiment of the present invention.

[0025] Figure 4 1 is a diagram showing an additional rotation state of the rear link when the unlocking device according to a preferred embodiment of the present invention is in a state where the locking pin is pressed to the maximum extent.

[0026] Figure 5 2 is a diagram showing a restraint device according to a preferred embodiment of the present invention.

[0027] Figure 6 1 is a diagram showing an unlocked state of a lock plate disposed below a locking pin according to a preferred embodiment of the present invention.

[0028] 10: rear link, 11: gear portion, 20: unlocking device, 21: first link, 22: second link, 23: pressurizing bracket, 231: external groove, 30: locking pin, 31: locking plate, 40: upper guide rail, 50: lower guide rail, 51: locking groove, 60: front link, 70: restraining device, 71: restraining gear, 711: unlocking groove, 712: restraining protrusion, 72: cable, 73: locking rod, 731: locking portion, 80: rotating device, FP: floor panel, H1: first hinge shaft, H2: second hinge shaft, H3: third hinge shaft, H4: fourth hinge shaft, PR: maximum pressing, SC: seat cushion frame, S1: first elastic member, S2: second elastic member DETAILED DESCRIPTION

[0029] Below, the preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, it should be noted that when marking the components of each drawing, the same components should be marked with the same reference numerals as much as possible even in different drawings. In addition, when describing the present invention, if it is determined that the specific description of the relevant known structure or function will make the gist of the present invention unclear, the detailed description thereof will be omitted. In addition, although the preferred embodiments of the present invention will be described below, the technical concept of the present invention is not limited to or restricted thereto, and can be modified and implemented in various ways by ordinary technicians in the field.

[0030] Figure 1 1 is a diagram showing the overall structure of a vehicle seat entry device according to a preferred embodiment of the present invention, Figure 2 1 is a diagram showing a restrained state of a rear link according to a preferred embodiment of the present invention, Figure 3 1 is a diagram showing a maximum pressing state of the lock pin by the unlocking device when the constraint of the rear link is released according to a preferred embodiment of the present invention.

[0031] like Figures 1 to 3 As shown, the present invention comprises: a rear link 10 which is constrained or released by operating a restraining device 70 ; an unlocking device 20 which operates in conjunction with the rear link 10 ; and a locking pin 30 which is pressed by the unlocking device 20 .

[0032] One end of the rear link 10 may be connected to the seat cushion frame SC via a first hinge shaft H1, and the other end of the rear link 10 may be connected to the upper rail 40 via a second hinge shaft H2.

[0033] The rear link 10 may be elastically supported by a rotating device 80 such as a spiral spring. When the rear link 10 is released, the rear link 10 may be rotated in an unlocking direction around the second hinge axis H2 by the elastic force of the rotating device 80.

[0034] The unlocking device 20 is activated as the rear link 10 rotates, and pressing the locking pin 30 can release the locking state of the upper rail 40 and the lower rail 50 locked by the locking pin 30 .

[0035] The unlocking device 20 may be composed of a connecting rod connection structure. The unlocking device 20 may include a first connecting rod 21 , a second connecting rod 22 and a pressurizing bracket 23 .

[0036] One end portion of the first link 21 may be connected to the other end portion of the rear link 10 via the third hinge shaft H3.

[0037] One side end portion of the second link 22 may be rotatably connected to the other side end portion of the first link 21. The other side end portion of the second link 22 may be connected to the seat cushion frame SC through a fourth hinge shaft H4.

[0038] When the rear link 10 rotates in the unlocking direction with the second hinge axis H2 as the center, the first link 21 and the second link 22 connected to the rear link 10 can move in conjunction. Through the rotation of the rear link 10, the other end of the first link 21 can press the one end of the second link 22. When the one end of the second link 22 is pressed downward by the first link 21, the pressurizing bracket 23 can be pressed.

[0039] The pressurizing bracket 23 may be elastically supported by a first elastic member S1 such as a torsion spring. When the pressurizing bracket 23 is rotated in the unlocking direction by being pressed by the second link 22, the upper end of the locking pin 30 may be pressed.

[0040] The pressurizing bracket 23 may include an external groove 231 and a pressurizing portion 232 .

[0041] The circumscribing groove 231 may be assembled to circumscribe the fifth hinge shaft H5 connected to the upper rail 40. The circumscribing groove 231 may be configured in a semicircular shape conforming to the fifth hinge shaft H5. The first elastic member S1 may be coupled to the fifth hinge shaft H5.

[0042] The pressurizing portion 232 may be formed to extend toward the locking pin 30 at a distance from the external connection groove 231 . The pressurizing portion 232 may be exposed through the through window 41 of the upper rail 40 .

[0043] The pressing portion 232 may press the upper end of the locking pin 30 while being pressed downward by the second link 22 .

[0044] When the second hinge axis H1 , the third hinge axis H3 and the first link 21 are located on a straight line SL through the rotation of the rear link 10 , a maximum pressing state PR of the locking pin 30 by the pressurizing bracket 23 can be achieved.

[0045] In the maximum pressed state PR of the locking pin 30 , the locking plate 31 below the locking pin 30 may be completely separated from the locking groove 51 of the lower rail 50 .

[0046] The front link 60 may be provided at a distance from the rear link 10 . One end of the front link 60 may be connected to the seat cushion frame SC. The other end of the front link 60 may be connected to the upper rail 40 .

[0047] Figure 4 1 is a diagram showing an additional rotation state of a rear link when a lock pin of an unlocking device according to a preferred embodiment of the present invention is in a state where it is maximally pressed.

[0048] like Figure 4 As shown, the rear link 10 can further rotate in the maximum pressing PR state of the locking pin 30. Even if the first link 21 further moves with the additional rotation of the rear link 10, due to the link connection structure of the unlocking device 20, the link movement trajectory is small, and therefore, it will not cause a great impact on the maximum pressing PR state of the locking pin 30.

[0049] Figure 5 2 is a diagram showing a restraint device according to a preferred embodiment of the present invention.

[0050] like Figure 5 As shown, the restraint device 70 may include: a restraint gear 71, which is meshed with a gear portion 11 arranged at one side end of the rear link 10; and a locking rod 73, which has a locking portion 731, which presses the restraint protrusion 712 of the restraint gear 71 when the rear link 10 is restrained, and is inserted into the restraint unlocking groove 711 of the restraint gear 71 when the restraint of the rear link 10 is released.

[0051] The lock lever 73 may be connected to the cable 72. The cable 72 may be connected to a driving device (not shown) such as an actuator.

[0052] For example, when a passenger operates an entry switch (not shown), a driving device (not shown) such as an actuator is driven to pull the cable 72 , and the lock lever 73 connected to the cable 72 can rotate in a direction to release the restraint.

[0053] Figure 6 1 is a diagram showing an unlocked state of a lock plate provided at a lower portion of a lock pin according to a preferred embodiment of the present invention.

[0054] like Figure 6 As shown, the upper end of the locking pin 30 may be exposed through the upper portion of the upper rail 40. The upper end of the locking pin 30 may be pressed downward by the pressurizing bracket 23.

[0055] When the locking pin 30 is pressed, the locking plate 31 disposed below the locking pin 30 may be disengaged from the locking groove 51 of the lower rail 50. Thus, the locked state may be released.

[0056] A portion of the locking pin 30 located inside the upper rail 40 may be elastically supported by the second elastic member S2 .

[0057] When the locking pin 30 descends, the second elastic member S2 can be compressed by the pressing of the locking pin 30. When the pressing force of the pressurizing bracket 23 pressing the locking pin 30 in the compressed state disappears, the second elastic member S2 stretches and pushes the locking pin 30 upward to return the locking pin 30 to its original position.

[0058] The lower rail 50 may be connected to a floor panel FP inside the vehicle.

[0059] The operation of the unlocking device when the rear link is rotated is described in detail below.

[0060] like Figures 1 to 3 As shown, when the passenger operates the entry switch (not shown), the restraint of the rear link 10 can be released by releasing the restraint device 70. The rear link 10 whose restraint is released can be rotated around the other end by the elastic force of the rotating device 80 such as a spiral spring.

[0061] When the rear link 10 rotates, the second hinge axis H2, the third hinge axis H3 and the first link 21 may be located on a straight line SL. When the second hinge axis H2, the third hinge axis H3 and the first link 21 are located on a straight line SL, the pressurizing bracket 23 may achieve a maximum pressing PR state on the locking pin 30.

[0062] like Figure 4 As shown, even if the first link 21 moves in conjunction with the additional rotation of the rear link 10 , since the movement of the first link 21 is small, the maximum pressing PR state of the locking pin 30 is not affected.

[0063] Next, the operation of the restraining device will be described in detail.

[0064] like Figure 5 As shown, when the locking portion 731 of the locking lever 73 presses the restraining protrusion 712 of the restraining gear 71, the restraining gear 71 can be engaged with the gear portion 11 of the rear link 10. Thus, the restraint of the rear link 10 can be achieved.

[0065] When a passenger operates an entry switch (not shown) in a state where the restriction gear 71 is meshed with the gear portion 11 of the rear link 10 , a driving device (not shown) such as an actuator may pull the cable 72 .

[0066] When the cable 72 is pulled, the locking lever 73 connected to the cable 72 may be rotated in an unlocking direction.

[0067] When the locking lever 73 rotates in the unlocking direction, the locking portion 731 of the locking lever 73 pressing the binding protrusion 712 may be inserted into the binding unlocking groove 711 of the binding gear 71 .

[0068] When the locking portion 731 of the pressing and restraining gear 71 is inserted into the restraint unlocking groove 711 of the restraining gear 71 , the meshing state of the restraining gear 71 meshed with the gear portion 11 can be released.

[0069] By releasing the meshing state between the restricting gear 71 and the gear portion 11 of the rear link 10 , a restricting-released state in which the rear link 10 can freely rotate can be achieved.

[0070] Next, the operation of the locking pin will be described in detail.

[0071] like Figure 6 As shown, the unlocking device 20 and the rotation of the rear link 10 are linked to each other, so that the pressing bracket 23 can press the upper end of the locking pin 30. As a result, the locking pin 30 can be lowered while pressing the second elastic member S2.

[0072] When the locking pin 30 descends, the locking plate 31 provided at the lower portion of the locking pin 30 inserted into the locking groove 51 of the lower rail 50 is disengaged from the locking groove 51 , so that the locking pin 30 is completely unlocked.

[0073] In the unlocked state, the upper rail 40 can move freely along the lower rail 50 .

[0074] The above description is only used to exemplify the technical spirit of the present invention, and ordinary technicians in the field to which the present invention belongs can make various modifications, changes and substitutions without departing from the essential features of the present invention. Therefore, the embodiments and drawings disclosed in the present invention are not intended to limit but to illustrate the technical spirit of the present invention, and the scope of the technical spirit of the present invention should not be limited by the above embodiments and drawings. The scope of protection of the present invention should be interpreted by the attached claims, and all technical spirits within their equivalent scope should be included in the scope of the present invention.

Claims

1. A vehicle seat entry device, wherein: include: A rear link, one end of which is connected to the seat cushion frame via a first hinge shaft, and the other end of which is connected to the upper guide rail via a second hinge shaft, and the rear link can rotate in an unlocking direction around the second hinge shaft; and The unlocking device operates in conjunction with the rotation of the rear link, and presses the locking pin through the interlocking action of the links composed of a plurality of links to achieve an unlocked state.

2. The vehicle seat entry device according to claim 1, wherein: The unlocking device comprises: A first connecting rod, one end of which is connected to the other end of the rear connecting rod through a third hinge shaft; A second connecting rod, one end of which is connected to the other end of the first connecting rod, and the other end of which is connected to the upper guide rail via a fourth hinge shaft; and The pressurizing bracket is elastically supported by the first elastic member, is pressed by the second link that moves in conjunction with the first link, and presses the locking pin while rotating in the unlocking direction.

3. The vehicle seat entry device according to claim 2, wherein: The pressurized support comprises: an external connection slot, assembled to be externally connected to a fifth hinge shaft connected to the upper guide rail; and The pressurizing portion is spaced apart from the external connection groove and extends toward the direction of the locking pin, and presses the locking pin by the pressing of the second link.

4. The vehicle seat entry device according to claim 3, wherein: The pressing portion is exposed through the through window of the upper rail so as to be able to press the second link.

5. The vehicle seat entry device according to claim 2, wherein: The upper end of the locking pin is exposed from the upper part of the upper guide rail. When the upper end of the locking pin is pressed downward by the pressure bracket, the locking plate below the locking pin is disengaged from the locking groove of the lower guide rail to release the locking state.

6. The vehicle seat entry device according to claim 5, wherein: When the rear link rotates in the unlocking direction and the second hinge shaft, the third hinge shaft and the first link are located in a straight line, the maximum pressing state of the locking pin is achieved by the pressure bracket, thereby achieving complete disengagement of the locking plate from the locking groove of the lower guide rail.

7. The vehicle seat entry device according to claim 3, wherein: A first elastic member is coupled to the fifth hinge axis, and the first elastic member elastically supports the pressurizing bracket.

8. The vehicle seat entry device according to claim 1, wherein: A gear portion is provided on the outer diameter portion of one side end portion of the rear link, and when the constraint gear of the constraint device is engaged with the gear portion, the constraint state of the rear link is realized. When the constraint device is released, the engagement between the gear portion and the constraint gear is released, and at the same time, the rear link rotates in the unlocking direction around the second hinge axis through the elastic support of the rotating device of the rear link.

9. The vehicle seat entry device according to claim 1, wherein: A front link is provided at a distance from the rear link, one end of the front link is connected to the seat cushion frame, and the other end is connected to the upper guide rail.

10. The vehicle seat entry device according to claim 2, wherein: The portion of the locking pin located inside the upper guide rail is elastically supported by a second elastic member, and the second elastic member is compressed when the locking pin is lowered, and then, when the pressure of the pressurizing bracket disappears from the locking pin and the second elastic member is stretched, the locking pin is returned to its original position.

Images