Seat slide device

Abstract

A seat slide device is disclosed. The seat slide device is provided with a lever and a pair of slide bodies having a fixed rail laid on a floor, a movable rail guided to slide by the fixed rail, a bracket provided to the movable rail, capable of swinging with the middle portion of the long side as a fulcrum, with the front and rear portions of the bracket being opposite to each other in the up and down directions, a bracket supported to be able to rotate only in one direction from a prescribed posture around an axis extending left and right using the hinge portion of the bracket, and a movement restriction portion which restricts the sliding of the movable rail in a state where the rear portion of the bracket is raised, and which releases the restriction of the sliding of the movable rail in a state where the rear portion of the bracket is lowered, the lever being fixed to the front portion of each bracket. If the lever is lifted up, the hinge portion (HG) prohibits the rotation of the bracket, and if the lever is lowered, the hinge portion (HG) allows the rotation of the bracket.

Description

TECHNICAL FIELD

[0001] The present application relates to a seat slide device. BACKGROUND

[0002] Japanese Patent No. 4171125 (Patent Document 1) describes a slide structure for slidingly moving a seat for a vehicle. The slide structure described in the above Patent Document 1 is provided with lower channels, upper channels, movement restriction portions, and a lever.

[0003] The lower channels are laid out in a pair on a floor of the vehicle in a manner to be spaced apart in a width direction of the floor. The upper channels are guided by the respective lower channels and are slidably moved in a front-rear direction. The movement restriction portions lock the sliding movement of the upper channels with respect to the respective lower channels. The lever is in a U shape having a pair of arm portions, and is disposed at a lower portion of the seat in a manner that the top ends of the arm portions are respectively connected to front portions of the movement restriction portions.

[0004] In this slide structure, the connecting portions of the lever extending in the width direction of the vehicle are located in front lower portions of the seat. The slide structure is configured so that the locking of the sliding movement by the movement restriction portions can be released by a passenger lifting the connecting portions with hands. SUMMARY

[0005] In the case of the seat slide structure described in the above Patent Document 1, for example, in the case where the floor is deformed in a manner to lift the rear end side of one of the pair of lower channels due to a collision of the vehicle, the arm portions of the lever connected to the front portions of the movement restriction portions are lifted with respect to the positions before the collision, and there is a risk that the locking of the sliding movement is released.

[0006] To address this, the present application aims to provide a seat slide device in which the locking of the sliding movement is not easily released even if the floor is deformed.

[0007] One technical solution of the present application relates to a seat slide device having the following structure.

[0008] A seat slide device includes an inner slide body, an outer slide body, and a lever, the inner slide body and the outer slide body each having a fixed rail laid on a floor of a vehicle in a posture extending in a front-rear direction of the floor, a movable rail fixed to a lower portion of a seat of the vehicle and guided to slide by the fixed rail, a bracket provided in the movable rail with the front-rear direction as a long side, the bracket being able to swing with a middle portion of the long side as a fulcrum so that front and rear sides of the bracket are opposite to each other, a bracket installed so as to be able to turn with respect to the bracket only in one direction from a prescribed normal posture about an axis extending in a left-right direction using a hinge portion provided in the bracket at a position further forward than the fulcrum, and a movement restriction portion that restricts the slide movement of the movable rail in a state in which a rear end portion of the bracket is raised and releases the restriction of the slide movement of the movable rail in a state in which the rear end portion of the bracket is lowered, the inner slide body and the outer slide body are arranged apart from each other in the left-right direction of the floor, and the lever is fixed so as to be connected to a front portion of the bracket of the inner slide body and a front portion of the bracket of the outer slide body, respectively, and is arranged in a front lower portion of the seat. In a case where the lever is raised when the bracket is in the normal posture, the hinge portion prohibits the turning of the bracket so that the bracket and the bracket are raised integrally, and in a case where the lever is lowered, the hinge portion allows the turning of the bracket so that the front portion of the bracket is lowered independently with respect to the bracket.

[0009] The inner slide body and the outer slide body can each include an urging member that urges the bracket to a turning position at which the bracket is in the normal posture with respect to the bracket.

[0010] According to the seat slide device having the above-described configuration, an effect can be obtained in which the locking of the slide movement is not easily released even if the floor is deformed. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 is a perspective view showing a state in which a seat slide device according to an embodiment is laid on a floor of a vehicle.

[0012] Figure 2 is Figure 1 is a sectional view of an S2-S2 position in

[0013] Figure 3 is a partial sectional view of an S3-S3 position in Figure 2

[0014] Figure 4 ​is a partial cross-sectional view of the S3-S3 position in Figure 2

[0015] Figure 5 is a perspective view showing a lever assembly constituting body possessed by the seat slide device.

[0016] Figure 6 is an exploded view of an outer assembly possessed by the lever assembly constituting body.

[0017] Figure 7 is a longitudinal cross-sectional view of the front portion of the outer slide body in the locked state.

[0018] Figure 8 is a longitudinal cross-sectional view of the front portion of the outer slide body in the unlocked state.

[0019] Figure 9 is a perspective view showing the state of the seat slide device after the floor is deformed.

[0020] Figure 10 is a longitudinal cross-sectional view of the front portion of the outer slide body after the floor is deformed. DETAILED DESCRIPTION

[0021] A seat slide device involved in the embodiments will be described based on the drawings. In addition, the same or similar reference numerals are assigned to the same or similar functions, structures, and the description thereof is appropriately omitted.

[0022] The seat slide device 91 involved in the embodiments is a device for slidingly moving a seat for a vehicle. The vehicle is, for example, an automobile.

[0023] First, the outline of the structure of the seat slide device 91 will be described with reference to Figure 1 Figure 1

[0024] Figure 1 shows a state after the seat 93 of the front passenger seat of a right-hand drive vehicle is installed by the seat slide device 91 in a manner capable of slidingly moving in the front-rear direction with respect to the floor 92. Figure 1 Figure 1

[0025] The seat slide device 91 is provided with an outer slide body 1, an inner slide body 2, and a lever 31. Among them, the lever 31 is provided to the seat slide device 91 as a lever assembly constituting body 3 that is previously linked to a bracket 51 of the outer slide body 1 and a bracket 61 of the inner slide body 2.

[0026] ​​​​​The outer slide body 1 and the inner slide body 2 are members of the same configuration formed in a substantially straight shape. The outer slide body 1 and the inner slide body 2 are laid in parallel on the floor 92 in a manner spaced apart in the width direction of the floor 92 and in a posture extending in the front-rear direction of the floor 92.

[0027] The outer slide body 1 has a fixed rail 11 and a movable rail 12 engaged with the fixed rail 11 and capable of sliding movement in the front-rear direction.

[0028] The fixed rail 11 is formed in a substantially squared U-shape in cross-sectional shape. The fixed rail 11 is laid on the floor 92 in a posture with the open side of the squared U-shape facing upward.

[0029] A foot support 111 is fixed to the lower surface of the front top end portion of the fixed rail 11 by welding. A foot support 112 is fixed to the lower surface of the rear top end portion of the fixed rail 11 by welding.

[0030] The foot support 111 is fixed to the floor fixing portion 921 of the floor 92 by a fixing bolt N1. The foot support 112 is also fixed to the floor fixing portion 922 of the floor 92 by a fixing bolt not shown. Thus, the outer slide body 1 is laid on the floor 92.

[0031] The movable rail 12 is formed in a substantially squared U-shape in cross-sectional shape. The movable rail 12 is engaged inside the fixed rail 11 in a posture with the open side of the squared U-shape facing downward and is capable of sliding movement in the front-rear direction.

[0032] A seat support 121 is fixed to the upper surface of the front top end portion of the movable rail 12. A seat support 122 is fixed to the upper surface of the rear top end portion of the movable rail 12.

[0033] The lever assembly 3 is an operating lever for releasing the locking of the sliding movement of the outer slide body 1 and the inner slide body 2. The lever assembly 3 is configured to include a lever 31 as an operating portion of the operating lever. The lever 31 has a pair of arm portions formed in a substantially U-shape, and the top end sides of the pair of arm portions are respectively connected to the outer slide body 1 and the inner slide body 2.

[0034] The inner slide body 2 has the same configuration as the outer slide body 1 described above. That is, the inner slide body 2 has a fixed rail 21 corresponding to the fixed rail 11 of the outer slide body 1, a movable rail 22 corresponding to the movable rail 12, a foot support 211 (212) corresponding to the foot support 111 (112), and a seat support 221 (222) corresponding to the seat support 121 (122).

[0035] The foot support 211 of the fixed rail 21 is fixed to the floor fixing portion 923 of the floor 92 by a fixing bolt N2. The foot support 212 of the fixed rail 21 is fixed to the floor fixing portion 924 by a fixing bolt not shown. Thus, the inner slide 2 is laid on the floor 92.

[0036] Figure 1 The seat 93 is indicated by a two-dot chain line. The seat 93 has a seat cushion 931 and a seat back 932. The frame leg portions 933 to 936 provided to the lower portions of a seat cushion frame (not shown) that is a skeleton of the seat cushion 931 are fixed to the seat supports 121, 122, 221, 222 by bolts (not shown), respectively. Thus, the seat 93 and the seat slide 91 are integrated, and the seat 93 is able to slide on the floor 92 by the seat slide 91.

[0037] The outer slide 1 of the seat slide 91 has a movement restriction portion 4 that is configured to include a latch plate 41, a notch portion 11c, a through-hole 12c, and a support 52 to be described below. The movement restriction portion 4 prohibits (locks) the slide movement of the movable rail 12 when the lever 31 is in the normal position, and permits (unlocks) the slide movement by lifting the front portion of the lever 31. The inner slide 2 also has the movement restriction portion 4 of the same configuration.

[0038] Hereinafter, the movement restriction portion 4 and the lever assembly 3 will be described in detail with the outer slide 1 as a representative. Figures 2-8

[0039] Figure 2 is a sectional view of the S2-S2 position in Figure 1

[0040] Figure 3 is a sectional view of the S3-S3 position in Figure 2 Figure 4 is a sectional view of the S3-S3 position in Figure 2

[0041] Figure 5 is a perspective view of the lever assembly 3 provided to the seat slide 91. Figure 6 is an exploded view of the outer assembly 5 provided to the lever assembly 3.

[0042] Figure 7 is a longitudinal sectional view of the front portion of the outer slide 1 in the locked state. Figure 8 is a longitudinal sectional view of the front portion of the outer slide 1 in the unlocked state.

[0043] As shown in Figure 2 ​​​​As shown, the fixed rail 11 has a bottom wall portion 11d, a pair of side wall portions 11a, and a pair of hooking portions 11b in a cross-sectional shape. The cross-section of the fixed rail 11 is formed in a left-right symmetrical shape into a substantially squared U-shape.

[0044] The bottom wall portion 11d is a flat plate-like portion extending long in the front-rear direction. The side wall portions 11a are wall-like portions formed so as to stand upward from left and right ends of the bottom wall portion 11d, respectively. The hooking portions 11b are wall-like portions folded back in an inverted L-shape at upper ends of the side wall portions 11a and extending downward.

[0045] The movable rail 12 has a top wall portion 12d, a pair of side wall portions 12a, and a pair of folded-back portions 12b in a cross-sectional shape. The cross-section of the movable rail 12 is formed in a left-right symmetrical shape into a substantially squared U-shape.

[0046] The top wall portion 12d is a flat plate-like portion extending long in the front-rear direction. The side wall portions 12a are wall-like portions formed so as to be folded down from left and right ends of the top wall portion 12d, respectively. The folded-back portions 12b are wall-like portions connected to lower ends of the side wall portions 12a and folded back toward the left-right direction outer side upward.

[0047] As shown in Figure 3 and Figure 4 , the hooking portions 11b of the fixed rail 11 have a plurality of notch portions 11c cut out at equal intervals PT1 and in the same rectangular shape from a lower end edge thereof upward. The plurality of notch portions 11c are formed at a portion of the fixed rail 11 that is substantially central in the long direction.

[0048] As shown in Figure 3 and Figure 4 , the folded-back portions 12b of the movable rail 12 have a plurality of insertion holes 12c formed at equal intervals PT1 and in the same rectangular shape. The plurality of insertion holes 12c are formed at a portion of the movable rail 12 that is substantially central in the long direction.

[0049] The number of the insertion holes 12c is less than the number of the notch portions 11c. In this example, the insertion holes 12c are four.

[0050] As shown in Figure 2 , the folded-back portions 12b of the movable rail 12 are positioned inside the hooking portions 11b of the fixed rail 11, and the top wall portion 12d protrudes upward from the opening portion of the upper portion of the fixed rail 11. The movable rail 12 is inserted and engaged in the fixed rail 11 in a manner not to contact the fixed rail 11 with an intervening unillustrated fitting member therebetween. The movable rail 12 is guided to slide move along the long direction of the fixed rail 11.

[0051] AsFigure 2 and Figure 7 As shown, a bushing 43 is installed in the top wall portion 12d of the movable guide rail 12 at approximately the center along its long side. A latching shaft 42 passes through the bushing 43 in such a way that it can move up and down within a specified range of motion.

[0052] A rectangular latch plate 41 is mounted on the lower end of the latch shaft 42, with its long side in the front-to-back direction. The latch plate 41 has a plurality of protrusions 41b on its left and right edges, which protrude to the left and right at a distance PT1, respectively. In this example, there are four protrusions 41b.

[0053] like Figure 3 and Figure 4 As shown, the four protrusions 41b respectively penetrate the four insertion holes 12c of the movable guide rail 12.

[0054] exist Figure 3 When the latch plate 41 is in the locked position above the predetermined range of motion, as shown, the protrusion 41b can engage with the notch 11c of the fixed guide rail 11. Furthermore, in Figure 4 When the latch plate 41 is in the unlocked position below the specified range of movement, as shown, the protrusion 41b can no longer engage with the notch 11c.

[0055] Therefore, by locking the latch plate 41 in the locked position and engaging it with the notch 11c, the movement restriction part 4 can be made into a locked state that prevents the movable guide rail 12 from moving relative to the fixed guide rail 11. Moreover, by locking the latch plate 41 in the unlocked position and preventing it from engaging with the notch 11c, an unlocked state can be made that allows the movable guide rail 12 to move relative to the fixed guide rail 11.

[0056] like Figure 7 As shown, a spring plate 7 is installed on the top wall portion 12d of the movable guide rail 12, at a position closer to the front side than the bushing 43. The spring plate 7 is formed of a thin sheet material for springs.

[0057] Specifically, the spring plate 7 has a base 73, a first force-applying part 71, and a second force-applying part 72. The upper end of the base 73 is mounted on the top wall 12d of the movable guide rail 12.

[0058] The base 73 is a portion that is fixed to the top wall portion 12d and extends downward. The lower end of the base 73 is located close to the bottom wall portion 11d of the fixed guide rail 11.

[0059] The first force-applying part 71 is a short strip extending rearward from the lower end of the base 73. The second force-applying part is a short strip extending parallel to the first force-applying part 71 in the left-right direction to a position much further rearward than the first force-applying part 71.

[0060] The first urging portion 71 and the second urging portion 72 function as leaf springs that are elastically deformed in the up-and-down direction with the joint portion with the base portion 73 as a fulcrum. The first urging portion 71 urges the bracket 52 described later in the upward direction, and the second urging portion 72 urges the latch plate 41 in the upward direction.

[0061] Next, the structure of the lever assembly 3 will be described with reference to Figure 5 and Figure 6 .

[0062] The lever assembly 3 has a lever 31, an outer assembly 5, and an inner assembly 6. The outer assembly 5 and the inner assembly 6 are of the same structure and are integrated by the lever 31. The outer assembly 5 and the inner assembly 6 are arranged in parallel with each other at the same position in the up-and-down direction in the seat slide device 91.

[0063] The lever 31 has a grip portion 31a, a pair of bent portions 31b, 31b, and a pair of joint end portions 31c, 31c, and is formed in a substantially U-shape in a left-right symmetrical shape. The lever 31 is formed by bending a pipe material and is arranged at a lower front portion of the seat 93.

[0064] The grip portion 31a is a straight portion extending in the left-right direction. The pair of bent portions 31b, 31b are portions extending from both left and right ends of the grip portion 31a. The pair of bent portions 31b, 31b are each curved in a plurality of stages and extend obliquely downward toward the left and right outer sides. The pair of joint end portions 31c are portions extending in parallel with each other toward the rear from the top ends of the respective bent portions 31b.

[0065] The pair of joint end portions 31c, 31c are joined to a front end portion of the outer assembly 5 and a front end portion of the inner assembly 6, respectively.

[0066] As shown in Figure 6 , the outer assembly 5 is assembled in a manner including a bracket 51, a bracket 52, a leaf spring 53, an upper bracket 54, a cap 55, a pin 56, and a blind rivet 57.

[0067] The bracket 52 has a bottom wall 52c elongated in the front-rear direction and side walls 52a, 52b rising from left and right edge portions of the bottom wall 52c. The bracket 52 is formed in a substantially squared U-shape in cross section.

[0068] Through-holes 52a1, 52b1 are formed at the front of the side walls 52a, 52b with an axis CL52 extending in the left-right direction as a concentric axis.

[0069] The bracket 51 is formed to a length of about 1 / 4 of the length of the holder 52. The bracket 51 has a bottom wall 51c elongated in the front-rear direction and side walls 51a, 51b rising from left and right edge portions of the bottom wall 51c. The bracket 51 is formed in a substantially squared U-shape in cross-sectional shape.

[0070] Through-holes 51a1, 51b1 are formed in the side walls 51a, 51b at positions substantially in the center in the long-side direction with the axis CL51 extending in the left-right direction as a concentric axis.

[0071] The through-holes 51a1, 51b1, 52a1, 52b1 are formed to the same inner diameter.

[0072] The bracket 51 is received between the side walls 52a, 52b of the holder 52 at a position where the axis CL51 is identical to the axis CL52. The pin 56 is inserted through the through-holes 52b1, 51b1, 51a1, 52a1 and is crimped at the through-holes 52b1, 51b1, 51a1, 52a1.

[0073] Thus, the bracket 51 is mounted so as to be rotatable about the axis CL51 (CL52) relative to the holder 52. The hinge portion HG is configured in a manner including the through-holes 51a1, 51b1 of the bracket 51, the through-holes 52a1, 52b1 of the holder 52, and the pin 56.

[0074] At the hinge portion HG, the bracket 51 is rotatable about the axis CL51 (CL52) in one direction from a normal posture in which the bottom wall 51c abuts against the bottom wall 52c. Figure 6 The rotation of the bracket 51 in the clockwise direction in the normal posture is allowed to a rotation position in which the bottom wall 51c abuts against the bottom wall 52c. The rotation of the bracket 51 is allowed only in one direction from the normal posture to a rotation position in which the bottom wall 51c abuts against the bottom wall 52c. Figure 6 The rotation of the bracket 51 in the counterclockwise direction in the normal posture is allowed.

[0075] The link end portion 31c of the lever 31 is fixed to the front end portion of the bracket 51 by welding.

[0076] As shown in Figs. 1 and 2, the bracket 51 is formed in a substantially squared U-shape in cross-sectional shape. Figure 6 and Figure 7 As shown in Figs. 1 and 2, the bracket 51 is formed in a substantially squared U-shape in cross-sectional shape.

[0077] The leaf spring 53 has a base portion 53a that is in close contact with the bottom wall 51c and is fixed to the bottom wall 51c by riveting, and an arm portion 53b that extends at a predetermined angle obliquely upward and rearward from the front end portion of the base portion 53a. The arm portion 53b has flexibility in the direction of increase and decrease of the predetermined angle relative to the base portion 53a.

[0078] The upper holder 54 that seals the gap between the side walls 52a, 52b is fixed to the substantially central portion in the long-side direction of the holder 52.

[0079] A resin cap 55 is installed at the rear end of the bracket 52. The cap 55 is a component that abuts against the upper surface of the latch plate 41 when the latch plate 41 is pressed down, as will be described later.

[0080] like Figure 7 and Figure 8 As shown, the outer component 5 is housed in the space V inside the outer sliding body 1.

[0081] In the normal state where the outer component 5 is housed in space V, the base 73 of the spring plate 7 abuts against the lower edge of the bracket 52 at position P2 and supports the outer component 5. Moreover, when the lever 31 is lifted to release the lock, causing the outer component 5 to move upward, the base 73 abuts against the upper bracket 54 at position P3.

[0082] Positions P2 and P3 are set as fulcrums at the midpoint of the long side of the bracket 52 in the front-rear direction. The bracket 52 is configured to be able to swing relative to positions P2 and P3 in a manner in which the front and rear sides of the bracket 52 are opposite to each other in height.

[0083] Figure 5 The inner component 6 shown has the same structure as the outer component 5. That is, the inner component 6 has a bracket 61 corresponding to the bracket 51 in the outer component 5, a bracket 62 corresponding to the bracket 52, a leaf spring 63 corresponding to the leaf spring 53, an upper bracket 64 corresponding to the upper bracket 54, a cap 65 corresponding to the cap 55, a pin 66 corresponding to the pin 56, and a blind rivet 67 corresponding to the blind rivet 57.

[0084] The connecting end 31c on the inner side of the lever 31 is fixed to the front end of the bracket 61 of the inner component 6 by welding. Moreover, the inner component 6 is housed inside the inner sliding body 2.

[0085] Next, refer to Figure 7 and Figure 8 As representatives of the outer sliding body 1 and the inner sliding body 2, the locking and unlocking actions of the outer component 5, which is housed in the outer sliding body 1, on the movable guide rail 12 will be explained.

[0086] like Figure 7 As shown, the outer component 5 is housed in space V with the gripping portion 31a and the bending portion 31b of the lever 31 exposed in front.

[0087] As described above, in the normal state, the lower edge of the bracket 52 is supported by the base 73 of the spring plate 7 at position P2. Then, when the bracket 52 is raised, the upper bracket 54 abuts against the base 73 at position P3, thereby restricting movement.

[0088] The first force-applying part 71 of the spring plate 7 always applies an upward force to the part of the lower edge of the bracket 52 that is further back than position P2 to lift it up (see arrow DR1).

[0089] Furthermore, the arm 53b of the leaf spring 53 abuts against the inner surface of the top wall 12d of the movable guide rail 12 and becomes flexed. Under the elastic rebound force of the leaf spring 53 generated by this flexed state, the bracket 51 is always subjected to downward force (refer to arrow DR2).

[0090] That is, in Figure 7 In the locked state shown, the bracket 52 uses the position P2 where the spring plate 7 abuts as a fulcrum and rotates around... Figure 7 The counterclockwise rotation is applied by the first force-applying part 71 and the leaf spring 53.

[0091] As a result, the bracket 52 rotates counterclockwise, and the cap 55 abuts against the inner surface of the top wall portion 12d of the movable guide rail 12, thus restricting the rotation and maintaining the posture.

[0092] The latch plate 41 is always subjected to an upward force by the second force-applying part 72 of the spring plate 7 (see arrow DR3). As long as no other external force is present, the latch plate 41 is maintained in this position. Figure 7 The lock position is shown.

[0093] The aforementioned locked position of the latch plate 41 is Figure 3 The position shown allows the latch plate 41 to enter the notch 11c of the fixed guide rail 11, preventing the movable guide rail 12 from sliding relative to the fixed guide rail 11.

[0094] In the locked state, the cap 55 of the outer component 5 is in the position where it is facing upward away from the latch plate 41.

[0095] When the grip part 31a of the lever 31 is lifted by the passenger on the seat 93 ( Figure 8 Referring to arrow DR4), the outer sliding body 1 moves from... Figure 7 The locked state shown has changed to the unlocked state.

[0096] In detail, when the gripping part 31a of the lever 31 is lifted by the hand of the passenger, the bracket 51 to which the connecting end 31c of the lever 31 is fixed is also lifted.

[0097] Bracket 51 is restricted to circumferential rotation relative to support 52 about axis CL51. Figure 8 The rotation is clockwise. Furthermore, the upward movement of the support 52 at position P3 is restricted because the upper support 54 abuts against the base 73 of the spring plate 7.

[0098] Therefore, when the gripping part 31a of the lever 31 is lifted, the bracket 52 and the support 51 are lifted together. The bracket 52 and the support 51 rotate around position P3 as their center. Figure 8 Lift it by rotating it clockwise (refer to arrow DR5).

[0099] The force F31 applied to the gripping part 31a by lifting it generates a clockwise torque T31 around the position P3.

[0100] On the other hand, the resultant force of the spring's rebound force generated by the leaf spring 53, the first force-applying part 71, and the second force-applying part 72 generates a spring combination torque Tg as a resultant torque in the counterclockwise direction around position P3.

[0101] Regarding the outer sliding body 1, the spring constants of the leaf spring 53 and the spring plate 7 are set such that the torque T31 generated by the normal locking release operation is greater than the torque Tg of the spring combination mentioned above.

[0102] By setting the torque T31 to be greater than the torque Tg formed by the spring combination, when the bracket 52 rotates clockwise, the latch plate 41 is pressed down by the cap 55 (refer to arrow DR9).

[0103] As a result, the latch plate 41 descends to the unlocked position, and the lock on the sliding movement of the movable guide rail 12 relative to the fixed guide rail 11 in the outer sliding body 1 is released.

[0104] The same action can also release the lock on the movable guide rail 22 relative to the fixed guide rail 21 in the inner sliding body 2.

[0105] As a result, the lock on the sliding movement of the seat 93 relative to the floor 92 is released, allowing it to slide.

[0106] When the force previously applied by the passenger to lift the lever 31a is released, the outer component 5 rotates due to the torque Tg generated by the spring assembly. Figure 8 The latch plate rotates counterclockwise. Then, the latch plate 41 rises to the locked position and returns to its original position. Figure 7 The locked state in the system.

[0107] Therefore, the movable guide rail 12 and the seat 93 connected to the movable guide rail 12 can be locked in the desired position.

[0108] The seat sliding device 91, by having the aforementioned structure, ensures that even if the floor 92 deforms due to external forces such as a vehicle collision, the locking mechanism for the sliding movement of the seat 93 is difficult to disengage. For further details, please refer to... Figure 9 and Figure 10 To illustrate.

[0109] Figure 9 An example of deformation of the floor 92 due to a collision of the vehicle or the like is shown. In detail, an example in which the floor fixing portions 921 to 923 are not largely deformed, but the vicinity of the floor fixing portion 924 that fixes the rear end portion of the inner slide body 2 is largely deformed in a manner of being raised upward (refer to arrow DR6) is shown.

[0110] In the deformed state of the floor 92 described above, the inner slide body 2 (shown by a single-dot chain line) becomes a tilted posture in which the rear side is raised with respect to the outer slide body 1 (shown by a solid line) that maintains a normal posture, as shown by arrow DR7. Figure 10

[0111] By the posture of the inner slide body 2 becoming the tilted posture in which the rear side is raised and the front side is relatively lowered as described above, a force Fl that desires to move the joint end portion 31c and the bent portion 31b of the inner slide body 2 side of the lever 31 downward is imparted, as shown by arrow DR8. Figure 9

[0112] This force Fl is transmitted to the bent portion 31b and the joint end portion 31c of the outer slide body 1 side via the grip portion 31a.

[0113] Here, the bracket 51 is allowed to rotate with the axis CL51 as a center with respect to the support 52 toward the lower side of the lever 31. The bracket 51 of the outer slide body 1 independently rotates in the counterclockwise direction in FIG. 8 (refer to arrow DR8) in correspondence with the force Fl. Figure 10

[0114] That is, the lever 31 becomes a lowered state in which it rotates from the position of the double-dot chain line to the position of the solid line in FIG. 8. Therefore, the joint end portion 31c of the inner slide body 2 side of the lever 31 is not subjected to the torsional reaction force from the outer slide body 1 side in correspondence with the force Fl. Figure 10

[0115] Therefore, the lever 31 also tilts in correspondence with the tilt of the inner slide body 2 along with the deformation of the floor 92 that raises the rear portion of the inner slide body 2. Thus, the locked state of the inner slide body 2 is maintained together with the locked state of the outer slide body 1.

[0116] Thus, even if the floor 92 is deformed, the locking of the seat slide device 91 to the sliding movement is not easily released.

[0117] Suppose a case in which the bracket 51 is not rotatable with respect to the support 52 and becomes integral. Even if the force Fl is applied to the portion of the lever 31 that is jointed to the inner slide body 2 side, the portion of the lever 31 that is jointed to the outer slide body 1 side desires to maintain its original posture. Therefore, the portion of the lever 31 that is the inner slide body 2 side is subjected to the torsional reaction force from the outer slide body 1 side in correspondence with the force Fl, and the lever 31 is maintained in the posture shown by the double-dot chain line in FIG. 8. Figure 10 ​​​​the position of the double-dot chain line in FIG. 10.

[0118] Thus, in the case where the bracket 51 is integrated so as not to be able to rotate with respect to the support 52, with respect to the inner slide 2 that has tilted in a manner that the floor 92 has deformed and the rear portion has been raised, the lever 31 relatively becomes a state of being raised, resulting in the lock being released.

[0119] As is apparent from the above, even if the floor 92 deforms, the seat slide 91 is able to prevent the lock of the sliding movement of the movable rail 12 from being released as described above, and is able to maintain the locked state well.

[0120] The seat slide 91 has, for example, a hinge portion HG that enables the bracket 51 to rotate with respect to the support 52 in the outer assembly 5.

[0121] Thus, by the total mass of the mass of the portion of the bracket 51 that is on the front side with respect to the axis CL5 and the mass of the lever 31 that is fixed to this portion, a counterclockwise torque Ta as indicated by the single-dot chain line arrow in FIG. 10 is always generated. Figure 8 This is the same for the inner assembly 6 that has the same configuration as the outer assembly 5.

[0122] For this reason, the seat slide 91 is provided with an urging member Sp that generates a clockwise torque Tb that exceeds the torque Ta in normal times. In the outer assembly 5, the urging member Sp is the plate spring 53.

[0123] The plate spring 53 is configured such that the base portion 53a is fixed to the portion of the bracket 51 that is on the right side with respect to the axis CL51, and the arm portion 53b elastically pushes against the inner surface of the top wall portion 12d of the movable rail 12. Also, the spring constant of the plate spring 53 is set so as to generate a torque Tb that is in the opposite direction and is larger than the torque Ta that is centered on the axis CL51 and is based on the self weight of the lever 31 and the like in normal times. Also, as described above, the spring combination torque Tg is set so as to be in the opposite direction and be smaller with respect to the torque T31 that is imparted by the occupant and rotates the gripping portion 31a in a manner that it is raised.

[0124] The above is the same for the inner assembly 6 that has the same configuration as the outer assembly 5.

[0125] Thus, since the seat slide 91 has the hinge portion HG, even if the floor 92 deforms, the lock of the sliding movement of the seat 93 is not easily released.

[0126] Also, since the seat slide 91 has the urging member Sp that is able to restrict the rotation at the hinge portion HG due to the self weight of the lever 31 and the like, in the normal state, the lever 31 does not sink on the front side due to the self weight.

[0127] Moreover, since the spring constant of the force applying member Sp is appropriately set, in the normal state, there is no risk that the brackets 52, 62 are pressed down and the lock is released, and the force with which the rider lifts the grip portion 31a of the lever 31 in order to release the lock does not become excessively large.

[0128] The present application is not limited to the above-described embodiments, and various modifications can be made within the scope of the gist of the present application.

[0129] The force applying member Sp is not limited to a plate spring, and can be a coil spring or an elastic member such as rubber.

[0130] The mechanism that locks the sliding movement of the movable rail 12 is not limited to the configuration of the movement restriction portion 4 described above, and is a configuration that can lock in the normal position of the lever 31 and can release the lock by lifting the grip portion 31a of the lever 31.

[0131] The seat slide device 91 is not limited to being mounted on an automobile. As a vehicle on which the seat slide device 91 can be mounted, there are various vehicles such as railway vehicles, ships, and airplanes.

Claims

1. A seat slide device, wherein the seat slide device is provided with an inner slide body, an outer slide body, and a lever, the inner slide body and the outer slide body each have: a fixed rail that is laid on a floor of a vehicle in a posture extending in a front-rear direction of the floor of the vehicle; a movable rail that is fixed to a lower portion of a seat of the vehicle, is guided by the fixed rail, and is slidably moved; a bracket that is provided in the movable rail with the front-rear direction as a long side, the bracket being able to swing with a middle portion of the long side as a fulcrum, with a front side and a rear side of the bracket being opposite to each other in a vertical direction; a bracket that is installed so as to be able to turn with respect to the bracket only in one direction from a prescribed normal posture about an axis extending in a left-right direction using a hinge portion provided in the bracket at a position further forward than the fulcrum; and a movement restriction portion that restricts the sliding movement of the movable rail in a state in which a rear end portion of the bracket is raised, and releases the restriction of the sliding movement of the movable rail in a state in which the rear end portion of the bracket is lowered, the inner slide body and the outer slide body are arranged apart from each other in a left-right direction of the floor, the lever is fixed in a manner of being connected to a front portion of the bracket of the inner slide body and a front portion of the bracket of the outer slide body, respectively, and is arranged in a front lower portion of the seat, in a state in which the bracket is in the normal posture, in a state in which the lever is raised, the hinge portion prohibits the turning of the bracket, and the bracket and the bracket are raised integrally, and in a state in which the lever is lowered, the hinge portion allows the turning of the bracket, and the front portion of the bracket is lowered independently with respect to the bracket.

2. The seat slide device according to claim 1, wherein the inner slide body and the outer slide body each have an urging member that urges the bracket in a manner of placing the bracket in a turning position of the normal posture with respect to the bracket.

Images