Trackless variable seat back type rear seat

Abstract

A trackless variable seatback type rear seat includes: a linear movement device configured to convert the rotation of a motor into linear movement; a sliding movement device configured to convert the linear movement into sliding movement that pushes a seat cushion forward or backward; and a reclining angle changing device configured to convert the sliding movement into reclining movement and fold the seat back connected to the seat cushion forward or recline the seat back backward.

Description

Technical Field

[0001] The present invention relates to a rear seat of a vehicle. Background Art

[0002] The statements in this section merely provide background information related to the present disclosure and may not constitute prior art.

[0003] Generally, there is a difference between vehicle seats in that the front seats of the vehicle have a variable seat back structure that allows reclining of the seat back, while the rear seats have a fixed seat back structure that does not allow reclining of the seat back.

[0004] Therefore, the reclining of the seat back inevitably causes discomfort in the fixed seat back type rear seat due to the passenger posture for a long-distance trip of 1 hour or more.

[0005] Therefore, in recent years, in some vehicle models such as luxury cars, there has been a trend toward applying a variable seat back type rear seat that uses a track-type seat back angle adjustment mechanism.

[0006] As an example, a track-type seat back angle adjustment mechanism includes a seat back motor, a pair of inner / outer rails on the left and right sides, a slot guide / mounting bracket, and other brackets, so that a reclining function can be implemented in the seat back of a rear seat, thereby operating as a variable seat back type rear seat.

[0007] That is, the rail-type seat back angle adjustment mechanism can allow a passenger to achieve a comfortable posture through a seat back angle adjustment function using a sliding function as an operating principle by performing the following operations: driving a motor → sliding of a cushion → the seat back connected to the cushion by a hinge moves forward along a slotted guide on the upper portion of the seat back → completion of reclining in which the seat back is reclined. In this case, "→" indicates the process order of the operations.

[0008] Therefore, even when sitting on the rear seat, the passenger can recline the seat back by the track-type seat back angle adjustment mechanism, thereby being free from an uncomfortable posture even for long-distance travel of 1 hour or more.

[0009] However, the rear seat with a track-type seat back angle adjustment mechanism is limited to luxury sedans in the model range.

[0010] This is because the seat back angle adjustment mechanism of the rear seat also includes a pair of inner and outer rails for the seat sliding function in addition to the power of the motor, and therefore, weight is increased and cost and material cost are increased due to the additional rail member.

[0011] Therefore, applying rear seats with track-type seat back angle adjustment mechanisms to mid-size / small-size models other than luxury sedans may inevitably weaken cost competitiveness. Summary of the Invention

[0012] The present invention provides a trackless variable seat back type rear seat, which can realize a reclining operation of a seat back by converting the power of a motor into a gear combination of a rack and pinion or a lead screw. In particular, since the seat sliding operation of the seat back reclining mechanism is based on a gear combination structure, the application field is expanded to mid-size / small-sized cars other than luxury cars by eliminating a structure having a pair of tracks that causes an increase in cost / material cost / weight.

[0013] A rear seat according to one form of the present invention includes a linear movement device that converts rotation of a motor into linear movement; a sliding movement device that converts linear movement into sliding movement that pushes a seat cushion forward or backward; and a reclining angle changing device that converts sliding movement into reclining movement and folds a seat back connected to the seat cushion forward or reclines the seat back backward.

[0014] As a preferred exemplary form, the linear moving device is located on the first side portion of the seat cushion or the central portion of the seat cushion.

[0015] As a preferred exemplary form, the linear moving device includes a motor in which rotation of the motor is generated; a sliding member configured to convert the rotation of the motor into linear movement and generate sliding movement for the sliding moving device through the linear movement; and a motor mounting bracket that fixes the motor to the first side portion of the seat cushion.

[0016] As a preferred exemplary form, the motor and the sliding member are connected through a gear mechanism including a pinion configured to receive rotation of the motor and a rack formed on a rack rod that moves linearly to mesh with the pinion.

[0017] As a preferred exemplary form, the pinion gear is located at the gear interval of the motor mounting bracket, and the rack bar is fixed to the rear seat crossbeam of the slide movement device to form a sliding angle upward.

[0018] As a preferred exemplary form, the rack bar forms slide stoppers on opposite sides of the rack, and the slide stoppers limit the moving distance of the sliding movement by the sliding stroke.

[0019] As a preferred exemplary form, the slide stopper includes a front end protrusion and a rear end protrusion that contact a spacing pin of the motor mounting bracket, and a distance between the front end protrusion and the rear end protrusion is set by a sliding stroke.

[0020] As a preferred exemplary form, the linear moving device includes a motor in which rotation of the motor is generated; a sliding member configured to convert the rotation of the motor into linear movement and generate sliding movement for the sliding moving device through linear movement; and a beam bracket that fixes the motor to the center portion of the seat cushion.

[0021] As a preferred exemplary form, the motor and the sliding member are connected via a motor reducer, and the sliding member is a lead screw.

[0022] As a preferred exemplary form, the sliding movement device includes a rear seat cross beam, which fixes the sliding member of the linear movement device and forms a seat cushion movement distance through sliding movement; a side upper bracket, which is fixed to the rear seat cross beam and forms a side upper bracket movement distance through sliding movement; a leg bracket, which is connected so that the side upper bracket has relative movement; and a slot pin, which allows the side upper bracket to move relative to the leg bracket.

[0023] As a preferred exemplary form, the rear seat cross member fixes the sliding member to a lower surface portion or an upper surface portion thereof.

[0024] As a preferred exemplary form, the slot pin is located on the guide slot of the leg bracket to move together with the side upper bracket.

[0025] As a preferred exemplary form, the guide groove includes a forward tilting groove and a rearward tilting groove, wherein the forward tilting groove and the rearward tilting groove are spaced apart from each other by a spacing, and each of the forward tilting groove and the rearward tilting groove has a positioning groove pin, and each of the forward tilting groove and the rearward tilting groove forms an upward inclination consistent with the sliding angle of the linear moving device.

[0026] As a preferred exemplary form, the sliding movement device includes: a rear seat cross beam, which fixes the sliding member of the linear movement device and forms a seat cushion movement distance through sliding movement; a pair of side upper movement brackets and side upper tilt brackets separated from each other, the pair of brackets being configured to move together with the rear seat cross beam through sliding movement to form a side upper bracket distance and increase the height of the seat cushion to the seat cushion tilt height; a tilt link, which connects the side upper movement bracket to the side upper tilt bracket; a leg bracket, which is coupled so that the side upper bracket has relative movement; and a slot pin, which is fixed to the tilt link and is configured to allow relative movement of the side upper movement bracket and the side upper tilt bracket relative to the leg bracket.

[0027] As a preferred exemplary form, the slot pin is located on the guide slot of the leg bracket to move together with the upper side moving bracket and the upper side tilting bracket.

[0028] As a preferred exemplary embodiment, the guide groove includes a reference groove and an inclined groove, the reference groove and the inclined groove being spaced apart from each other by a distance, and a groove pin being located on each of the reference groove and the inclined groove. The tilt link provides sliding movement to the upper side movable bracket and the upper side tilt bracket, allowing the seat cushion tilt height to be set by relative movement of the upper side tilt bracket relative to the upper side movable bracket.

[0029] As a preferred exemplary form, the seat cushion inclination height is formed by an upward angle difference between the reference inclination groove and the inclined inclination groove, and the upward angle difference is formed by setting the inclination angle of the inclined inclination groove to be greater than the reference inclination angle of the reference inclination groove.

[0030] As a preferred exemplary form, the reclining angle changing device includes a hinge connecting the seat cushion to the seat back and a backrest mounting bracket, wherein the hinge forms an axial long hole and forms a reclining movement at a seat back reclining distance (where a fixed shaft fixed to the seat back moves in the axial long hole).

[0031] As a preferred exemplary form, the backrest mounting bracket is located on an upper portion of the seat back.

[0032] The trackless variable seatback type rear seat according to the present invention achieves the following operations and effects.

[0033] First, the rear seat can be reclined using a trackless sliding mechanism combining a rack and pinion, thereby improving the seat structure. Second, by eliminating the traditional pair of tracks and adopting a trackless sliding mechanism, costs, material costs, and weight can be reduced by approximately 15% or more compared to conventional reclining structures. Third, the rear seat's adjustable seatback angle allows passengers to adopt a comfortable posture for long journeys of one hour or more, thereby improving customer satisfaction. Fourth, by applying rear seats with seatback angle adjustment to mid-size and compact sedans in addition to luxury sedans, the vehicle's marketability can be increased. Fifth, the rear seat can simultaneously utilize both a reclining and a tilting function, thereby increasing rear seat comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order that the present invention may be better understood, different forms of the invention given by way of example will now be described with reference to the accompanying drawings, in which:

[0035] Figure 1 A view showing the structure of a trackless variable seat back type rear seat according to one form of the present invention;

[0036] Figure 2A-2B This is a diagram showing the structure of a motor and a moving member of a linear moving device that constructs a trackless sliding mechanism according to one form of the present invention, wherein Figure 2B It is a directional stereogram;

[0037] Figure 3 A view showing an example of the layout of a motor and a sliding member according to one form of the present invention;

[0038] Figure 4 A view showing the detailed structure of a motor mounting bracket of a linear motion device according to one form of the present invention;

[0039] Figure 5A-5B This is a view showing the structure of a bracket member of a sliding movement device for constructing a trackless sliding mechanism according to one form of the present invention, wherein Figure 5B It is a directional side view;

[0040] Figure 6 A view showing the structure of a reclining angle changing device for constructing a trackless sliding mechanism according to one form of the present invention;

[0041] Figure 7 A view showing an operating state of a trackless sliding mechanism applied to a rear seat according to one form of the present invention;

[0042] Figure 8 This view is a view showing a seat cushion sliding movement operation state by a combination of a linear movement device and a sliding movement device constituting a trackless sliding mechanism according to one form of the present invention. Figure 7 Cross-sectional view along line AA;

[0043] Figure 9 A view showing a structure in which a linear moving device constituting a trackless sliding mechanism is changed to a lead screw according to one form of the present invention;

[0044] Figure 10 A view showing a rear seat reclining operation state using a lead screw according to one form of the present invention;

[0045] Figure 11 A view showing an example of combining a seat cushion tilting mechanism and a trackless sliding mechanism in a rear seat according to one form of the present invention; and

[0046] Figure 12 A view showing an operation state in which a seat cushion of a rear seat is tilted by a tilt mechanism according to one form of the present invention.

[0047] The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. DETAILED DESCRIPTION

[0048] The following description is merely exemplary in nature and is not intended to limit the present invention, its application, or uses. It should be understood that throughout the drawings, corresponding reference numerals indicate like or corresponding parts and features.

[0049] Hereinafter, an exemplary form of the present invention will be described in detail with reference to the accompanying exemplary drawings, which is illustrative and can be implemented in various forms by those skilled in the art to which the present invention pertains, and is therefore not limited to the exemplary form described herein.

[0050] Reference Figure 1 , the rear seat 1 applied to the vehicle 100 includes the trackless sliding mechanism 10. In this case, the vehicle 100 is not specified as one vehicle type by including a mid-size / small-size car in addition to a luxury car.

[0051] Specifically, the rear seat 1 includes a seat cushion 2 for a passenger to sit on and a seat back 7 for the passenger to lean on.

[0052] As an example, the seat cushion 2 has a cushion frame 3 connected to the rear portion thereof, a front cross member 5 connected to the front portion thereof, and a cushion frame cross bar 6 for reinforcing rigidity, thereby forming a "□"-shaped skeleton as a whole and being surrounded by a seat cushion pad (not shown), wherein the cushion frame cross bar 6 is arranged at a central position thereof relative to a left cushion mounting bracket 4A and a right cushion mounting bracket 4B having a predetermined length and a mounting structure that can be assembled to a vehicle body at predetermined width intervals.

[0053] As an example, the seat back 7 has a back frame crossbar 9 for reinforcing rigidity. The crossbar 9 extends across the upper portion of a back frame 8 having predetermined dimensions, thereby forming a "□"-shaped frame as a whole and is surrounded by a seat back cushion (not shown). In this case, the back frame crossbar 9 is attached so that the back frame 8 can be tilted and moved up / down without being moved by a back mounting bracket 90 (not shown) fixed to the vehicle body.

[0054] Specifically, the cushion frame 3 and the back frame 8 are connected by a hinge 80 including a pair of first hinges 80A and a second hinge 80B, and are connected to left / right lateral ends 9A, 9B of the back frame cross bar 9 by a back mounting bracket 90 having a pair of left back mounting brackets 90A and right back mounting brackets 90B, so that the angle of the back frame 8 is adjusted by tilting the cushion frame 3 when it slides.

[0055] In addition, both sides of the front cross member 5 are connected to the left / right mat mounting brackets 4A, 4B, and are welded with a motor mounting bracket 40 for fixing the motor. The two parts of the mat frame cross bar 6 are placed on the left upper bracket 50A and the right upper bracket 50B.

[0056] Therefore, the seat cushion 2 and the seat back 7 of the rear seat 1 are common components of the rear seat, except that the side upper brackets 50 of the trackless sliding mechanism 10 are connected to the left / right cushion mounting brackets 4A, 4B, the hinge 80 hinges the cushion frame 3 to the backrest frame 8, and the backrest mounting bracket 90 hinges the backrest frame cross bar 9.

[0057] Specifically, the trackless sliding mechanism 10 includes linear moving devices 20 , 30 , 40 , sliding moving devices 50 , 60 , 60 - 1 , 70 and a reclining angle changing device 90 .

[0058] Specifically, the linear movement device 20 , 30 , 40 includes a motor 20 , a sliding member 30 , and a motor mounting bracket 40 , and converts the rotation of the motor into linear movement.

[0059] As an example, the motor 20 generates power for the reclining mechanism and rotates the pinion 23. The sliding member 30 is driven by a rack 32 (see FIG. Figure 2A-2B ) converts the rotational movement of the motor 20 into linear movement, and forms a sliding angle (K) having a predetermined angle (ie, an acute angle) upward while being fixed to the rear seat cross member 70.

[0060] Therefore, the motor 20 and the sliding member 30 apply the gear combination of the pinion 23 and the rack 32 as a gear mechanism to the sliding movement of the cushion frame 3 and the reclining angle change of the back frame 8 .

[0061] As an example, the motor mounting bracket 40 fixes the motor 20 and is coupled to the left cushion mounting bracket 4A to position the motor 20 and the sliding member 30 on one side portion (ie, the left side portion) of the seat cushion 2 .

[0062] Specifically, the sliding movement device 50 , 60 , 60 - 1 , 70 includes a side upper bracket 50 , a leg bracket 60 , and a rear seat cross member 70 and converts the linear movement of the linear movement device 20 , 30 , 40 into a sliding movement that pushes the seat cushion 2 forward or backward.

[0063] As an example, the side upper bracket 50 and the leg bracket 60 are coupled to each other. In this case, the side upper bracket 50 includes a pair of left upper brackets 50A and right upper brackets 50B for supporting the left and right sides of the seat cushion, and is fixed to the rear seat cross member 70 so as to move together with the rear seat cross member 70, while the leg bracket 60 includes a pair of left leg brackets 60A and right leg brackets 60B for supporting the left and right sides of the seat cushion, and is coupled to the left / right upper brackets 50A, 50B in a state where it is fixed to the left / right cushion mounting brackets 4A, 4B and does not move.

[0064] Specifically, the left upper bracket 50A and the right upper bracket 50B of the side upper bracket 50 are connected by the forward / rearward tilting grooves 61A, 61B (see FIG. 1 ) according to the guide grooves 61 formed on the left leg bracket 60A and the right leg bracket 60B. Figure 5A-5B ) moves linearly with the rear seat cross member 70.

[0065] As an example, the rear seat cross member 70 is connected by a hinge bolt 70-1 (see Figure 2A-2B ) is connected to the rack bar 31 of the sliding member 30, and transmits the power received from the rack bar 31 to the left upper bracket 50A and the right upper bracket 50B fixed on both sides by welding (see Figure 5A-5B ).

[0066] Specifically, the reclining angle changing device 90 converts the sliding movement of the sliding movement devices 50 , 60 , 70 into a reclining movement of the seat back 7 reclining rearward or forward, and to this end, includes a hinge 80 and a backrest mounting bracket 90 .

[0067] As an example, the hinge 80 includes a pair of first and second hinges 80A and 80B that connect the cushion frame 3 and the backrest frame 8, which are spaced apart from each other. The hinge 80 is combined with the forward movement of the sliding member 30 (i.e., the rack bar 31) driven by the motor 20 to move the seat cushion 2 (i.e., the cushion frame 3) forward, thereby adjusting the angle of the seat back 7 (i.e., the backrest frame 8) for reclining. In this case, each of the first and second hinges 80A and 80B of the hinge 80 is connected to hinge links from the cushion frame 3 and the backrest frame 8 via a hinge pin 80-1.

[0068] As an example, the backrest mounting bracket 90 includes a pair of left and right backrest mounting brackets 90A and 90B, which are fixed to each of the left and right lateral ends 9A, 9B of the backrest frame cross bar 9, are welded to a vehicle body portion (not shown) to connect the backrest frame 8 to the vehicle body, and receive the operating force of the motor 20 to allow the fixed shaft 90-1 in the hinge to be fixed in the shaft elongated hole 91 (see FIG. Figure 6 ) so that the backrest frame 8 rotates at a reclining angle relative to the axial long hole 91.

[0069] at the same time, Figures 2A to 6 The detailed structure of each of the linear moving devices 20 , 30 , 40 , the sliding moving devices 50 , 60 , 60 - 1 , 70 and the reclining angle changing device 90 constituting the trackless sliding mechanism 10 is shown.

[0070] Reference Figure 2A-2B and Figure 3In the linear moving devices 20, 30, 40 shown in FIG, the motor 20 and the sliding member 30 are arranged in the left direction, which is one of the left / right directions of the seat cushion 2, using the motor mounting bracket 40 coupled to the left cushion mounting bracket 4A. In this case, the motor 20 and the sliding member 30 may be arranged in the right direction, which is the opposite direction of the left / right directions of the seat cushion 2, using the motor mounting bracket 40 coupled to the right cushion mounting bracket 4B.

[0071] Specifically, in the assembly of the motor 20 and the sliding member 30 , the motor 20 includes a motor reducer 21 and a pinion gear 23 , and the sliding member 30 includes a rack bar 31 .

[0072] As an example, the motor 20 rotates in the forward / reverse direction by a drive signal from an operation button (not shown) and transmits the forward / reverse rotational force to the motor reducer 21. The motor reducer 21 includes a gear that reduces or increases the torque generated by the motor's rotational force, and rotates the pinion 23. The pinion 23 generates an output from the motor 20 through the motor reducer 21 using the rotational force. In this case, the motor 20 receives a reclining motor signal (a) from an operation button (not shown) and is driven by power provided by the vehicle or a battery. Although a general-purpose motor is suitable, a stepping motor may be used.

[0073] In particular, the motor 20 and / or the motor reducer 21 are fixed to the motor mounting bracket 40 by bolting or welding. Furthermore, the motor 20 and the motor reducer 21 are orthogonal to each other, so that the output of the motor and the output of the motor reducer are orthogonal to each other, and the motor reducer 21 and the pinion 23 are coaxially arranged to form the same rotation direction.

[0074] Specifically, the sliding member 30 includes a rack bar 31 arranged in parallel with the motor 20 , and the rack bar 31 forms a rack 32 , sliding stoppers 33A, 33B, and a fixed end 35 .

[0075] As an example, the rack 32 is formed on the bottom surface of the rack bar 31, and the slide stoppers 33A and 33B are formed on the upper surface of the rack bar 31. In this case, the slide stoppers 33A and 33B are formed as a front end protrusion 33A and a rear end protrusion 33B, and the spacing pin 43 of the motor mounting bracket 40 is located at the interval between the front end protrusion 33A and the rear end protrusion 33B, so that the forward movement of the rack bar 31 (i.e., the sliding movement of the seat cushion 2) is restricted by the rear end protrusion 33B, and the rearward movement of the rack bar 31 (i.e., the return movement of the seat cushion 2 from its initial position) is restricted by the front end protrusion 33A.

[0076] Therefore, the interval between the front end protrusion 33A and the rear end protrusion 33B forms a sliding stroke (S), and the sliding stroke (S) is formed to be the same as the gear forming length of the rack 32 .

[0077] As an example, the fixed end 35 is bent upward at an edge of the rack bar 31 and fixed by a fixing bracket 71 and a hinge bolt 70 - 1 protruding toward a lower surface of the rear seat cross member 70 .

[0078] Specifically, the pinion 23 and the rack 32 form a gear combination that meshes with each other and rotates simultaneously, and the gear combination forms a sliding angle (K) of a predetermined angle (i.e., an acute angle) upward with the hinge bolt 70-1 as a fixed point. The sliding angle (K) is formed because the guide grooves 61 (i.e., the front / rear tilting grooves 61A, 61B) of the leg brackets 60 (i.e., the left / right leg brackets 60A, 60B) that slide through the groove pin 60-1 and move together with the side upper bracket 50 (i.e., the left / right side upper bracket 50A, 50B) form the same tilt angle as the sliding angle (K) (see Figure 5A-5B ).

[0079] As described above, the trackless sliding mechanism 10 applies a gear combination using the pinion 23 and the rack 32 as a basic rotation-linear movement structure. In this case, the reclining height (H) formed by the pinion 23 relative to the left / right cushion mounting brackets 4A, 4B is set to meet the seat cushion lifting height (h) of the seat cushion 2 (see Figure 8 ).

[0080] Reference Figure 4 In the illustrated linear moving devices 20, 30, 40, the motor mounting bracket 40 includes a motor plate 41, a seat plate 42, and a plurality of spacer pins 43. In this case, the motor mounting bracket 40 is provided with only the left pad mounting bracket 4A and not the right pad mounting bracket 4B.

[0081] Specifically, the motor plate 41 and the seat plate 42 are coupled by a spacing pin 43 having a predetermined length in a state of facing each other to form a gear spacing (T) by the length of the spacing pin 43 .

[0082] As an example, the motor plate 41 is fastened to the housing of the motor reducer 21 by bolts or screws and positions the pinion 23 from the perforated opening at the gear spacing (T). The seat plate 42 is fixed by welding or fastened to the left pad mounting bracket 4A by bolts or screws.

[0083] As an example, a set of three spacer pins 43 is provided, including two lower spacer pins connecting the lower portions of the motor plate 41 and the seat plate 42, and one upper spacer pin connecting the upper portions thereof. In this case, the upper spacer pin of the spacer pins 43 is positioned between the front end protrusion 33A and the rear end protrusion 33B of the slide stoppers 33A, 33B to serve as a stopper.

[0084] Reference Figure 5A-5BThe sliding movement devices 50, 60, and 70 shown illustrate the coupling relationship between the side upper bracket 50, the leg bracket 60, and the rear seat cross member 70. In this case, the side upper bracket 50 includes left and right upper brackets 50A and 50B, and the leg bracket 60 includes left and right leg brackets 60A and 60B, but they are constructed in the same structure, so the left upper bracket 50A and the left leg bracket 60A are used as an example for description.

[0085] Specifically, the left upper bracket 50A has an approximate The left leg support 60A has a cross section and includes an upper support body that forms at least one bent portion in the longitudinal direction while surrounding the left leg support 60A, and one side surface of the upper support body is fixed to one edge of the rear seat cross member 70 by welding. The leg bracket body is shaped in cross section so as to be inserted into the left upper bracket 50A in a state of being fixed to the left pad mounting bracket 4A by welding.

[0086] Therefore, upon sliding movement of the gear combination of the pinion 23 and the rack 32 , the left upper bracket 50A can move together with the rear seat cross member 70 , while the left leg bracket 60A remains fixed together with the left cushion mounting bracket 4A fixed to the vehicle body (not shown).

[0087] In particular, the left upper bracket 50A and the left leg bracket 60A are connected by a slot pin 60-1, which passes through a pin long hole 51 perforated on the side of the upper bracket body of the left upper bracket 50A and a guide slot 61 perforated on the side of the leg bracket body of the left leg bracket 60A.

[0088] As an example, the pin slot 51 includes a forward-inclined slot 51A and a rearward-inclined slot 51B spaced apart from each other, and the guide groove 61 includes a forward-inclined slot 61A and a rearward-inclined slot 61B. In this case, the separation distance between the forward / rearward-inclined slots 51A and 51B and the forward / rearward-inclined slots 61A and 61B is set to be equal to the sliding stroke (S), and the inclination angle of the forward / rearward-inclined slots 51A and 51B and the forward / rearward-inclined slots 61A and 61B is set to be equal to the sliding angle (K).

[0089] Therefore, through the sliding movement of the gear combination of the pinion 23 and the rack 32, the groove pin 60-1 moves along the inclination angle of the forward / backward tilting long holes 51A, 51B and the forward / backward tilting grooves 61A, 61B, so that it can be consistent with the movement of the rack bar 31 to the sliding angle (K).

[0090] However, the forward / backward tilting long holes 51A, 51B may be formed by simple holes through which the groove pin 60-1 is fitted, since the groove pin 60-1 moves along the forward / backward tilting grooves 61A, 61B.

[0091] As an example, both edges of the rear seat cross member 70 are fixed to the insides of the upper bracket bodies of the left upper bracket 50A and the right upper bracket 50B by welding, respectively, so as to move integrally with the left / right upper brackets 50A, 50B.

[0092] Reference Figure 6 The reclining angle changing device 90 shown has a backrest mounting bracket 90 fixed to a vehicle body (not shown) so as not to move, includes a left backrest mounting bracket 90A and a right backrest mounting bracket 90B, and is fixed to the left lateral end 9A and the right lateral end 9B of the backrest frame cross bar 9.

[0093] Further, each of the left / right backrest mounting brackets 90A, 90B forms an axially long hole 91 inclined at a reclining angle, and a fixing shaft 90 - 1 fixed to the left / right portion of the backrest frame 8 by screw fastening or welding is fitted into the axially long hole 91 .

[0094] Therefore, through the sliding movement of the gear combination of the pinion 23 and the rack 32, the fixed shaft 90-1 moves along the axial long hole 91 when the backrest frame cross bar 9 and the backrest mounting bracket 90 are fixed, so that the backrest frame 8 connected by the hinge 80 can be adjusted to the tilt angle by tilting downward (or upward).

[0095] at the same time, Figure 7 and Figure 8 The linear moving devices 20 , 30 , 40 of the trackless sliding mechanism 10 are shown in an operating state where the rear seat 1 is slidably moved and the reclining angle is changed by operating the sliding moving devices 50 , 60 , 70 and the reclining angle changing device 90 using a gear combination.

[0096] In this case, the rotation of the motor 20 will be described as forward rotation, the rotation of the pinion 23 as counterclockwise rotation, and the movement of the rack bar 31 as forward movement via the rack 32. In addition, for clarity of description, the left upper bracket 50A and the left leg bracket 60A will be described as examples.

[0097] First, if Figure 2A-2B As shown, the motor 20 is driven by a power source together with a reclining motor signal (a) of an operation button (not shown).

[0098] Next, refer to Figure 7 The rotation of the motor 20 is transmitted to the pinion 23 through the motor reducer 21, and the rotation of the pinion 23 is transmitted to the rack rod 31 through the rack 32 meshing with the pinion 23, so that the rack rod 31 starts to move forward while forming a sliding angle (K).

[0099] As a result, the rear seat 1 is converted from the front reclining state to the rear reclining state, thereby achieving a reclining angle change in which the seat back 7 is reclined by the forward movement of the seat cushion 2 .

[0100] More specifically, when entering the rear reclining state from the front reclining state, the forward movement of the rack bar 31 pulls the rear seat cross member 70 connected by the hinge bolt 70-1, so that the left upper bracket 50A fixed to the rear seat cross member 70 by welding is pulled and moved forward together with the rear seat cross member 70.

[0101] As a result, the forward movement of the rack bar 31 is completed to the sliding stroke (S), and at the same time, the forward movement of the left upper bracket 50A and the rear seat cross member 70 is completed to the seat cushion movement distance (X). At this time, the left leg bracket 60A is fixed to the left cushion mounting bracket 4A, thereby maintaining a stationary state.

[0102] refer to Figure 8 , the seat cushion movement distance (X) is achieved by the movement of the slot pin 60 - 1 .

[0103] That is, the groove pin 60-1 is positioned in the forward / rearward tilting long holes 51A, 51B of the left upper bracket 50A while passing through the forward / rearward tilting grooves 61A, 61B of the left leg bracket 60A, thereby moving together in the moving direction of the left upper bracket 50A.

[0104] Then, the groove pin 60-1 moves along the sliding angle (K) of the forward / rearward tilting grooves 61A, 61B, so that the movement of the groove pin 60-1 forms the seat cushion lifting height (h), and the forward movement of the left upper bracket 50A forms the side upper bracket moving distance (Z).

[0105] As a result, the seat cushion 2 is lifted upward by the cushion lifting height (h) while sliding the side upper bracket forward by the moving distance (Z), and this movement of the seat cushion 2 is transmitted to the seat back 7 through the hinge 80 .

[0106] Refer back to Figure 7 , the first / second hinges 80A, 80B of the hinge 80 pull the back frame 8 of the seat back 7 downward by moving the combination of the seat cushion lift height (h) and the side upper bracket movement distance (Z) via the hinge pin 80-1.

[0107] Then, the fixed shaft 90-1 moves downward along the inclination direction of the axial long hole 91 formed in the right backrest mounting bracket 90B (and the left backrest mounting bracket 90A) and moves the seat back reclining distance (Y), allowing the backrest frame 8 to move downward by the seat back reclining distance (Y), so that the reclining angle of the seat back 7 is changed by the seat back reclining distance (Y).

[0108] As described above, the trackless sliding mechanism 10 adjusts the angle of the seat back by interlocking the reclining of the back frame 8 of the seat back 7, and at the same time, the cushion frame 3 of the seat cushion 2 is linearly moved forward / backward by the motor 20 and the gear combination of the pinion 23 and the rack 32, so that the rear seat 1 is characterized as a trackless variable seat back type rear seat.

[0109] at the same time, Figure 9 and Figure 10 An example is shown in which the trackless sliding mechanism 10 is changed to a lead screw combination of the motor 20 and the lead screw 30 - 1 .

[0110] Reference Figure 9 , its trackless sliding mechanism 10 and Figures 1 to 8 The difference compared thereto is that some components are changed by replacing the sliding member 30 of the pinion 23 and the rack 32 with a lead screw 30 - 1 , and replacing the motor mounting bracket 40 with a beam bracket 40 - 1 .

[0111] As an example, the motor 20 transmits the rotational force to the motor reducer 21 , and the lead screw 30 - 1 is directly connected to the motor reducer 21 , converting the rotation of the motor reducer 21 into forward / backward linear movement.

[0112] As an example, the tandem cross member 70 forms a fixing bracket 71 on an upper surface portion of the tandem cross member 70 and is fixed to the lead screw 30 - 1 by a hinge bolt 70 - 1 .

[0113] Therefore, there is an advantage in that the lead screw assembly can form a layout of the trackless sliding mechanism 10 in the middle of the seat cushion 2.

[0114] Further, with Figures 1 to 8 In contrast, the motor mounting bracket 40 of the trackless sliding mechanism 10 is fixed to the front crossbeam 5 by welding and fastened to the housing of the motor reducer 21 by bolts or screws, so that Figures 1 to 8 In contrast, the motor mounting bracket 40 of the trackless sliding mechanism 10 does not form a gear interval (T), thereby simplifying the shape and structure of the motor mounting bracket 40 .

[0115] Reference Figure 10 , it can be seen that with Figures 1 to 8 In comparison, the only difference is that the trackless sliding mechanism 10 realizes the reclining angle changing operation through a lead screw combination.

[0116] As shown in the figure, the driving of the motor 20 rotates the motor reducer 21 , and the rotation of the motor reducer 21 is transmitted to the lead screw 30 - 1 , which then converts the rotation into linear movement, thereby pulling the rear seat cross member 70 .

[0117] Then, the rear seat cross member 70 moves the left and right upper brackets 50A and 50B fixed together by welding in the same direction, and the groove pin 60-1 moves linearly along the forward / backward tilting elongated holes 51A and 51B and the forward / backward tilting grooves 61A and 61B in a state where the left and right upper brackets 50A and 50B are fixed to the left and right leg brackets 60A and 60B.

[0118] Results, such as Figure 7 and Figure 8 As shown, the seat cushion 2 and the seat back 7 form a seat cushion moving distance (X), a seat cushion lifting height (h), a side upper bracket moving distance (Z), and a seat back reclining distance (Y), thereby changing the reclining angle of the seat back 7.

[0119] As described above, the trackless sliding mechanism 10 adjusts the angle of the seat back by interlocking the reclining of the back frame 8 of the seat back 7, while simultaneously performing forward / rearward linear movement of the cushion frame 3 of the seat cushion 2 by the screw combination of the motor 20 and the lead screw 30-1, so that the rear seat 1 is characterized as a trackless variable seat back type rear seat.

[0120] at the same time, Figure 11 and Figure 12 An example is shown in which the tilting function of the shoe 2 is combined with the trackless sliding mechanism 10 .

[0121] Reference Figure 11 ,and Figures 1 to 8 In contrast, the side upper bracket 50 of the trackless sliding mechanism 10 is connected to the tilt link 50 - 3 .

[0122] To this end, the side upper bracket 50 includes a left upper bracket 50A and a right upper bracket 50B, wherein the left upper bracket 50A includes a side upper moving bracket 50-1 and a side upper tilting bracket 50-2, and the right upper bracket 50B includes a side upper moving bracket 50-1 and a side upper tilting bracket 50-2.

[0123] As an example, the upper side movable bracket 50-1 is formed with a reference long hole 52 into which a groove pin 60-1 is fitted instead of the pin long hole 51, and the upper side tilt bracket 50-2 is formed with a tilt long hole 53 into which a groove pin 60-1 is fitted instead of the pin long hole 51. In addition, each of the left / right leg brackets 60A, 60B of the leg bracket 60 is formed with a reference tilt groove 61C and a tilt tilt groove 61D instead of the front / rear tilt grooves 61A, 61B.

[0124] Therefore, in the connected state of the side movable bracket 50-1 and the left leg bracket 60A (and the right leg bracket 60B), the slot pin 60-1 passes through the reference long hole 52 and the reference inclined groove 61C, and in the connected state of the side inclined bracket 50-2 and the left leg bracket 60A (and the right leg bracket 60B), the slot pin 60-1 passes through the inclined long hole 53 and the inclined inclined groove 61D.

[0125] Further, the groove pin 60-1 is connected to the tilt link 50-3, and in a state where the side upper tilt bracket 50-2 overlaps and is connected to the side upper movable bracket 50-1, the tilt link 50-3 performs a seat cushion tilting operation of lifting the side upper tilt bracket 50-2, while interlocking the movement of the side upper movable bracket 50-1 and the side upper tilt bracket 50-2.

[0126] In addition, the seat cushion tilting operation is realized by using the reference long hole 52 and the inclined long hole 53 of the side upper movable bracket 50-1 and the reference inclined groove 61C and the inclined inclined groove 61D of the left leg bracket 60A (and the right leg bracket 60B). In this case, the reference long hole 52 and the inclined long hole 53 can be formed as a hole structure through which the groove pin 60-1 passes.

[0127] As an example, when the reference inclination angle (α) formed upward by the reference long hole 52 and the reference inclined groove 61C is set to a reference value, the inclination angle (β) formed upward by the inclined long hole 53 and the inclined inclined groove 61D is set to a larger angle.

[0128] Therefore, the seat cushion 2 can be lifted by the upward angular difference (β-α) between the tilt inclination angle (β) and the reference inclination angle (α). To this end, the tilt movement stroke of the tilt link 50-3 is formed to be longer than the sliding stroke (S), and the tilt movement stroke is variably set according to the tilt degree of the cushion 2.

[0129] and Figures 1 to 7 compared to, Figure 12 The tilting operation of the rear seat 1 performed before or after the reclining operation of the trackless sliding mechanism 10 by connecting the side upper bracket 50 of the trackless sliding mechanism 10 to the tilt link 50 - 3 is shown.

[0130] As shown in the figure, the motor 20 and the motor reducer 21 pull the rear seat cross beam 70 through the gear combination of the pinion 23 and the rack 32, and the left upper bracket 50A moves forward together with the rear seat cross beam 70 relative to the fixed left leg bracket 60A (see Figure 7 ).

[0131] Then, the side upper movable bracket 50-1 and the side upper tilt bracket 50-2 of the left upper bracket 50A are moved forward to the sliding stroke (S) to change the reclining angle of the seat back 7, and then the seat cushion 2 is tilted upward by the tilt link 50-3 that moves following the sliding stroke (S) due to the continuous drive of the motor 20.

[0132] As an example, when the seat cushion 2 is tilted upward, the movement of the rear seat cross beam 70 continuously driven by the motor 20 causes the side upper movable bracket 50-1 and the side upper tilt bracket 50-2 to move through the tilt link 50-3, so that the tilt link 50-3 can move further when the slot pin 60-1 stops in the reference long hole 52 (or reference tilt groove 61C) of the side upper movable bracket 50-1.

[0133] Then, in a state where the side movable bracket 50-1 does not move at the tilt angle (β) (the tilt angle (β) has an upward angle difference (β-α) with the reference tilt angle (α) connected to the hinge pin 60-1), the tilt link 50-3 further pushes the side tilt bracket 50-2 by the upward angle difference (β-α), so that the side tilt bracket 50-2 is lifted, and in a state where the seat back 7 completes the reclining angle change with the seat back reclining distance (Y), the upward movement of the side tilt bracket 50-2 can form the seat cushion tilt height (U) to change the cushion 2 at the seat cushion tilt height (U).

[0134] Therefore, by using the upward angular difference (β-α) movement of the tilt link 50 - 3 , the cushion 2 can perform a tilting operation of raising the seat cushion tilt height (U).

[0135] As described above, the trackless variable seat back type rear seat 1 according to the exemplary form of the present application applies a trackless sliding mechanism 10 to the seat cushion 2 and the seat back 7 connected to each other, wherein the trackless sliding mechanism 10 can use the linear moving devices 20, 30, 30-1, 40 to achieve linear movement conversion of motor rotation, use the sliding moving devices 50, 60, 60-1, 70 to push the seat cushion 2 to the front or rear, and use the reclining angle changing devices 80, 90 to achieve reclining movement conversion to fold to the front of the seat back 7 or recline to the rear of the seat back 7, thereby achieving the reclining operation of the seat back 7 by the gear mechanism combination of the motor 20 and the pinion 23 / rack 32 of the linear moving devices 20, 30, 30-1, 40 or the screw combination of the motor 20 and the lead screw 30-1, and in particular, by eliminating the structure with a pair of tracks that causes increased cost / material cost / weight, the application field of the rear seat 1 with a seat back reclining function is expanded to mid-size / small-sized cars other than luxury cars.

Claims

1. A rear seat, comprising: a linear motion device configured to convert the rotation of the motor into linear motion; a sliding movement device configured to convert the linear movement into a sliding movement that pushes the seat cushion forward or backward; and A reclining angle changing device, wherein the reclining angle changing device is configured as follows: converting a sliding movement into a reclining movement and folding a seat back connected to a seat cushion forward or reclining the seat back rearward; Wherein, the sliding movement device includes: A rear seat cross member configured to fix a sliding member of the linear motion device and form a seat cushion movement distance through sliding movement; A side upper bracket, the side upper bracket being fixed to the rear seat cross member and slidingly moving to form a side upper bracket moving distance; a leg support coupled so that the upper side support can have relative sliding movement with respect to the leg support; and A slot pin is configured to allow relative movement of the upper side bracket relative to the leg bracket.

2. The back seat according to claim 1, wherein: The linear movement device is located on the first side portion of the seat cushion or the central portion of the seat cushion.

3. The back seat according to claim 2, wherein: The linear motion device comprises: a motor in which a rotation of the motor is generated; a sliding member configured to convert the rotation of the motor into linear movement and generate a sliding movement for the sliding movement device through the linear movement; and A motor mounting bracket is configured to secure the motor to the first side portion of the seat cushion.

4. The back seat according to claim 3, wherein: The motor and the sliding member are connected via a gear mechanism, and The gear mechanism includes a pinion gear configured to receive rotation of the motor and a rack gear formed on a rack bar that moves linearly and configured to mesh with the pinion gear.

5. The back seat according to claim 4, wherein: The pinion gear is located at the gear spacing of the motor mounting bracket, and The rack bar is fixed to the rear seat crossbeam of the sliding movement device and forms a sliding angle upward.

6. The back seat of claim 4, wherein: The rack bar forms sliding stops on opposite sides of the rack, and The slide stopper limits the moving distance of the sliding movement by the sliding stroke.

7. The back seat according to claim 6, wherein: The slide stopper includes a front end protrusion and a rear end protrusion that contact the spacing pin of the motor mounting bracket, and The sliding stroke sets the distance between the front protrusion and the rear protrusion.

8. The back seat according to claim 2, wherein: The linear motion device comprises: a motor in which a rotation of the motor is generated; a sliding member configured to convert the rotation of the motor into linear movement and generate a sliding movement for the sliding movement device through the linear movement; and A cross-beam bracket is configured to secure the motor to a center portion of the seat cushion.

9. The rear seat according to claim 8, further comprising a motor reducer configured to connect the motor and the sliding member. The sliding member is a lead screw.

10. The back seat according to claim 1, wherein The tandem cross member fixes the sliding member to a lower surface portion of the tandem cross member or an upper surface portion of the tandem cross member.

11. The back seat according to claim 1, wherein: The slot pin is located on the guide slot of the leg bracket and is configured to move together with the upper side bracket.

12. The back seat of claim 11, wherein: The guide groove includes a forward tilting groove and a backward tilting groove, the forward tilting groove and the backward tilting groove are spaced apart from each other by a distance, and The forward and rearward tilt grooves each include a groove pin positioned therein, and The forward tilt groove and the rearward tilt groove each form an upward slope aligned with a sliding angle of the linear motion device.

13. The back seat according to claim 1, wherein: The reclining angle changing device comprises: a hinge connecting the seat cushion to the seat back; and A backrest mounting bracket forms an axially long hole and forms a reclining movement at a seat back reclining distance in which a fixed shaft fixed to the seat back moves in the axially long hole.

14. The back seat according to claim 13, wherein: The backrest mounting bracket is located on the upper portion of the seat back.

15. A rear seat comprising: a linear motion device configured to convert the rotation of the motor into linear motion; a sliding movement device configured to convert the linear movement into a sliding movement that pushes the seat cushion forward or backward; and A reclining angle changing device, wherein the reclining angle changing device is configured as follows: converting a sliding movement into a reclining movement and folding a seat back connected to a seat cushion forward or reclining the seat back rearward; Wherein, the sliding movement device includes: A rear seat cross member, the rear seat cross member fixing the sliding member of the linear movement device and forming a seat cushion movement distance through sliding movement; a pair of side upper movable brackets and side upper tilt brackets separated from each other, the pair of side upper movable brackets and side upper tilt brackets being configured to move together with the rear seat cross member by sliding movement to form a side upper bracket distance and increase the height of the seat cushion to the seat cushion tilt height; a tilt link connecting the upper side moving bracket to the upper side tilt bracket; a leg bracket coupled so as to allow relative movement of the upper side brackets; and A slot pin is fixed to the tilt link and is configured to allow relative movement of the upper side moving bracket and the upper side tilt bracket with respect to the leg bracket.

16. The back seat according to claim 15, wherein: The slot pin is located on the guide slot of the leg bracket and is configured to move together with the upper side moving bracket and the upper side tilting bracket.

17. The back seat of claim 16, wherein: The guide groove includes a reference groove and an inclined groove, and the reference groove and the inclined groove are spaced apart from each other by a distance. The slot pin is located on each of the reference and inclined slots, and The tilt link provides sliding movement to the upper side moving bracket and the upper side tilt bracket, and allows the seat cushion tilt height to be formed by relative movement of the upper side tilt bracket with respect to the upper side moving bracket.

18. The back seat according to claim 17, wherein: By setting the inclined inclination angle of the inclined trough to be greater than the reference inclination angle of the reference trough, an upward angular difference is formed.

19. The back seat according to claim 17, wherein: The seat cushion tilt height is determined by the upward angular difference between the reference tilt groove and the tilt tilt groove.

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