JP5212017B2 - Seat slide device - Google Patents

Description

  The present invention relates to a seat slide device for adjusting a vehicle seat back and forth.

  2. Description of the Related Art Conventionally, as a seat slide device for adjusting a vehicle seat back and forth, a seat slide lock device shown in Patent Document 1 is known. The slide lock device is configured to slide the seat member back and forth by fitting an upper channel (upper rail) attached to the seat member to a lower channel (lower rail) attached to the floor member.

A lock plate (lock member) is supported on the upper channel so as to be swingable up and down, and a lock projection (lower rail side engagement) that engages with each lock hole (each engagement piece) of the lock plate is supported on the lower channel. Part) is formed at a predetermined pitch. Then, when the lock hole of the lock plate is engaged with the lock convex portion of the lower channel, the upper channel is locked to the lower channel at the slide position. In this way, by forming a plurality of lower rail side engaging portions at a predetermined short pitch on the lower rail, the slide position between the lower rail and the upper rail is set finely.
JP 2001-187539 A

FIG. 8 is an explanatory diagram for explaining the pseudo-lock state.
On the other hand, as described above, there is also a market demand for setting the slide position to a few places without setting the slide position between the lower rail and the upper rail finely. In this way, in order to limit the sliding position to several places, as shown in FIG. 8, the same number of engaging recesses 137a to 137c that can be engaged with the engaging pieces 153a to 153c of the lock member 150 are formed. It is necessary to provide the engaging portion 137 on the lower rail 130 according to the number of slide positions to be set. In FIG. 8, only one of the plurality of engaging portions 137 is shown for convenience.

  As shown in FIG. 8, when a plurality of engaging portions 137 having three engaging recesses 137 a to 137 c are provided on the lower edge portion 136 of the lower rail 130, the engaging recesses are provided between the engaging portions 137. A lower edge 136 that does not exist is provided. For this reason, when only the first engagement piece 153a farthest from the tilt center of the lock member 150 (the left side in FIG. 8) is in contact with the lower end of the lower edge portion 136 during the sliding of the lock member 150, the second The pseudo-lock in which the engagement piece 153b and the third engagement piece 153c and the third engagement recess 137c and the first engagement recess 137a of the engagement portion 137 engage with each other only at the end without being completely engaged. A condition can arise.

  When the above-described pseudo-lock state occurs, each engagement piece and each engagement recess are engaged with each other only at the ends, and the lock strength is insufficient. There is a problem that the sheet slides.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a seat slide device that can suppress the occurrence of a pseudo-lock state.

  In order to achieve the above object, in the seat slide device according to claim 1, the two or more engaging recesses (37a to 37c) are fixed to the vehicle body (B) and are arranged on the outer edge portion (36). Are fixed to the seat (S) and slidable with respect to the lower rail member. The lower rail member (30) has a plurality of engaging portions (37) formed at equal intervals in the longitudinal direction of the outer edge portion. An upper rail member (20) and a lock member (50) supported by the upper rail member so as to be tiltable so that the same number of engaging pieces (53a to 53c) as the engaging recesses can be engaged and disengaged. And an operation member (70) for tilting the lock member about the tilt center (L) to engage and disengage the engaging pieces and the engaging recesses (10). And said When the hook member is engaged with the engaging portion, the first engaging piece portion (53a) that is the farthest from the tilting center of the engaging piece portions and the second closest to the tilting center. The engagement piece (53b) is engaged with the first engagement recess (37a) and the second engagement recess (37b) among the respective engagement recesses, and the outer edge portion is engaged with each engagement. When the other engaging piece portion excluding the first engaging piece portion is positioned to be engageable with the other engaging recessed portion except the second engaging recessed portion, the first engaging piece portion The technical feature is that the first edge portion (36a) which is a contact portion is formed so as to protrude from the other outer edge portion toward the first engagement piece portion side.

  According to the first aspect of the present invention, the lower rail member is provided with a plurality of engaging portions in the outer edge of which two or more engaging recesses are formed at equal intervals in the longitudinal direction of the outer edge. In addition, the same number of engaging pieces as the engaging recesses are detachably formed on the lock member that is tiltably supported by the upper rail member. When the outer edge portion of the lower rail member is located in each engagement portion so that the other engagement piece portion except the first engagement piece portion can be engaged with the other engagement recess portion except the second engagement recess portion. That is, when the lock member is located at a position where the lock member is likely to be in a pseudo-lock state (hereinafter also referred to as a pseudo-lock position), the first edge contacting the first engagement piece is another outer edge. Further, it is formed so as to protrude toward the first engagement piece portion side.

For this reason, when the first engaging piece portion of the locking member located at the pseudo-locking position contacts the first edge portion of the outer edge portion of the lower rail member, the engaging piece portions of the locking member are separated from the tilting center. It tilts away from the outer edge except the first edge. Since the lock member is tilted in this way, even if the lock member is located at the pseudo-lock position, the other engagement piece portion excluding the first engagement piece portion and the other second engagement recess portion are excluded. It is possible to make it difficult to engage the engaging recess.
Therefore, the occurrence of the pseudo lock state can be suppressed.

  In the invention of claim 2, the outer edge portion of the lower rail member is such that the portion between the second engagement recess and the third engagement recess adjacent to the second engagement recess is the second edge in each engagement portion. It is formed so as to be separated from each engaging piece portion as it is separated from the engaging concave portion, and the portion between the third engaging concave portion and the first engaging concave portion is different from each other in comparison with other outer edge portions. It is formed so as to be separated from the combination piece.

  As the first edge protrudes from the other outer edge toward the first engagement piece, the tilt angle of the lock member positioned at the pseudo lock position increases, and the occurrence of the pseudo lock state is further suppressed. On the other hand, the larger the first edge protrudes, the narrower the tilting range in which the locking member tilts in accordance with the operation of the operation member. This causes another problem that the operability of the operation member is deteriorated.

  Therefore, the outer edge portion between the second engagement recess and the third engagement recess is formed so as to be separated from each engagement piece as the distance from the second engagement recess is increased. By narrowing the tilting range of the lock member by forming the portion of the outer edge portion between the combination recessed portion and the first engaging recessed portion so as to be separated from each engaging piece portion as compared with the other outer edge portions. In addition, the tilt angle of the lock member positioned at the pseudo lock position can be further increased. Thereby, generation | occurrence | production of a pseudo lock state can be suppressed more without impairing the operativity of an operation member.

[First Embodiment]
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a side view showing a schematic configuration of a vehicle seat S on which a seat slide device 10 according to the first embodiment is installed. FIG. 2 is a partially exploded perspective view of the seat slide device 10 of FIG. FIG. 3 is a partial cross-sectional view of the seat slide device 10 of FIG. 4 is a cross-sectional view taken along the line 4-4 shown in FIG.

  As shown in FIGS. 1 to 3, the seat slide device 10 fixes the vehicle seat S to the vehicle floor B so as to be slidable back and forth, and mainly includes an upper rail 20 fixed to the vehicle seat S; The lower rail 30 fixed to the vehicle floor B via the front and rear foot 31 and a pair of lock levers 50 that can fix (lock) the upper rail 20 and the lower rail 30 so as not to move relative to each other (see FIG. 1 and FIG. 1). FIG. 2 shows only one), an operation lever 70 that is operated to switch between the locked state of the upper rail 20 and the lower rail 30 by the pair of lock levers 50 and the unlocked state that releases the locked state; It has.

  As shown in FIG. 4, the upper rail 20 is substantially horizontal to the vehicle floor B, and an upper wall 21 to which the vehicle seat S is attached via a bracket or the like not shown, and a side wall 22 that is suspended from both ends of the upper wall 21. And a connecting portion 23 that is bent upward and bent from the lower ends of the side walls 22 and an inclined portion 24 that holds the first steel ball 41 of the retainer 40 in a space between the lower rail 30.

  A cutout 25 is provided in each of the side walls 22 and the connecting portions 23 connected to the side walls 22 so as not to contact the lock portion 52 of the lock lever 50 in the locked state.

  As shown in FIG. 4, the lower rail 30 is substantially horizontal to the vehicle floor B, faces the upper wall 21 of the upper rail 20 and is fixed to the vehicle floor B via front and rear feet 31, and the bottom wall 32. A first side portion 33 extending upward from both ends of the first side portion 33, a flange portion 34 provided substantially parallel to the bottom wall 32 from the upper ends of the first side portions 33 toward the center, and terminals of both flange portions 34 A second side 35 extending toward the bottom wall 32 and extending substantially parallel to the first side 33 is provided.

  The outer edge portion 36 which is the lower end portion of the second side portion 35 is formed with three engaging portions 37 in the same shape in the longitudinal direction, and each engaging portion 37 has three engaging recesses ( A first engagement recess 37a, a third engagement recess 37c, and a second engagement recess 37b) are formed at equal intervals from the counter-operating lever side (see FIG. 2). The detailed shape of each engaging portion 37 will be described later.

  In the upper rail 20 and the lower rail 30, the upper wall 21 of the upper rail 20 faces the bottom wall 32 of the lower rail 30, and the upper rail 20 is inclined in a space between the first side portion 33 and the second side portion 35 of the lower rail 30. It arrange | positions so that the part 24 may enter. The first steel ball 41 of the retainer 40 is disposed between the corner portion between the first side portion 33 and the flange portion 34 of the lower rail 30 and the inclined portion 24 of the upper rail 20, and the bottom wall 32 of the lower rail 30. The second steel ball 42 of the retainer 40 is disposed between the corner portion between the first side portion 33 and the connecting portion 23 of the upper rail. With the first steel ball 41 and the second steel ball 42 held by the retainer 40, the upper rail 20 and the lower rail 30 can slide smoothly in the vehicle front-rear direction.

  As shown in FIGS. 2 and 3, the lock lever 50 includes a base 51 having a U-shaped cross section and a lock 52, and the pin 61 serves as a tilt center L at both side walls 51 a of the base 51. The upper rail 20 is supported to be tiltable.

  Two locking holes 52a are respectively formed in the flat plate portions at both ends of the locking portion 52, so that the first engaging piece portion 53a and the third engaging portion are separated from those which are separated from the tilting center L in the longitudinal direction. The same number of engaging pieces as the engaging recesses 37a to 37c of the combining piece 53c and the second engaging piece 53b are formed. The first engagement piece 53a is formed to be engageable with and disengageable from the first engagement recess 37a of the engagement portion 37, and the third engagement piece 53c is engageable with and disengaged from the third engagement recess 37c. The second engaging piece 53b is formed so as to be detachable from the second engaging recess 37b.

  As shown in FIGS. 1 to 3, the operating lever 70 includes a gripping portion 71 disposed on the outer side of the upper rail 20, and a connection extending from the both ends of the gripping portion 71 in parallel with each other in a substantially square shape. And a support portion 73 connected to each of the connecting portions 72. The support portion 73 is supported by the side walls 22 so as to be tiltable about the pin 62 as a tilt center in a state where the support portion 73 is disposed in the upper rail 20.

  As shown in FIG. 3, in the lock lever 50 and the operation lever 70, the bottom wall 51 b of the base portion 51 and the lower surface of the support portion 73 are connected via a connecting member 63. Accordingly, when the support portion 73 tilts based on the operation of the operation lever 70, the lock lever 50 tilts around the tilt center L according to the tilt of the support portion 73.

  A first urging member 64 is provided on the upper wall 21 of the upper rail 20 to urge the lock portion 52 of the lock lever 50 in the direction in which the lock portion 52 is pressed against the engagement portion 37 of the lower rail 30 (lock direction). ing. The first urging member 64 is inserted through the opening 51c of the base 51 and urges the lower surface of the lock portion 52 upward at the tip 64a.

  In addition, the upper wall 21 of the upper rail 20 is provided with a second urging member 65 for urging the support portion 73 of the operation lever 70 in a direction (lock direction) in which the support portion 73 is pressed against the lock portion 52 of the lock lever 50. ing. The second urging member 65 urges the distal end portion of the support portion 73 downward at the distal end portion 65a.

Here, the detailed shape of the engaging portion 37 of the lower rail 30 will be described with reference to FIG. FIG. 5 is a side view showing the detailed shape of the engaging portion 37 of the lower rail 30.
As shown in FIG. 5, the outer edge portion 36 includes a second engaging piece portion 53 b and a third engaging piece portion 53 c in each engaging portion 37 except for the first engaging piece portion 53 a. The first outer edge portion 36a, which is a portion that comes into contact with the first engagement piece portion 53a when positioned so as to be engageable with the third engagement recess portion 37c and the first engagement recess portion 37a except for the two engagement recess portions 37b, It is formed so as to protrude from the other outer edge portion toward the first engagement piece portion 53a.

  The first outer edge portion 36a is formed so as to incline in the slide front-rear direction from the lower end portion 36b which is the lowermost portion, and the length of the lower end portion 36b in the slide front-rear direction is relatively long in the front-rear direction. When the second engagement piece 53b and the third engagement piece 53c are located at the above-described pseudo-lock position, the second engagement piece 53b and the third engagement piece 53c are set so as to always contact the upper surface of the first engagement piece 53a.

  Therefore, when the second engagement piece 53b and the third engagement piece 53c are positioned at the pseudo-lock position, the first engagement piece 53a is on the upper surface thereof and the lower end portion 36b of the first outer edge portion 36a. The lock portion 52 of the lock lever 50 tilts so as to separate from the outer edge portion 36 except for the first outer edge portion 36a as the engagement pieces 53a to 53c move away from the tilt center L. Become.

  In the seat slide device 10 configured as described above, the locked state of the engaging portion 37 of the lower rail 30 and the lock portion 52 of the lock lever 50 will be described with reference to FIGS. FIG. 6 is an explanatory diagram for explaining an engagement state between the engagement portion 37 of the lower rail 30 and the lock portion 52 of the lock lever 50. FIG. 6A illustrates the engagement pieces 53a to 53c. FIG. 6 (B) shows a state where the first engaging piece 53a abuts against the first outer edge portion 36a.

  In a state where the lock lever 50 is tilted by the unlocking operation of the operation lever 70, or in a state where the upper surface of the lock portion 52 is in contact with the lower surface of the outer edge portion 36, the lock lever 50, etc. The combining pieces 53b, 53c, 53a are slid to positions where they can be engaged with the respective engaging recesses 37b, 37c, 37a of the corresponding engaging portions 37. Then, as the lock lever 50 tilts in the locking direction, as shown in FIG. 6A, the engaging pieces 53b, 53c, 53a are engaged with the engaging recesses 37b, 37c, 37a. In this state, the engagement portion 37 of the lower rail 30 and the lock portion 52 of the lock lever 50 engage with each other.

  On the other hand, as shown in FIG. 6B, when the second engagement piece 53b and the third engagement piece 53c are located at the pseudo lock position, the first engagement piece 53a is the first outer edge portion 36a. Therefore, the lock portion 52 tilts away from the outer edge portion 36 excluding the first outer edge portion 36a as the distance from the tilt center L increases. Since the lock portion 52 is tilted in this way, even if the second engagement piece portion 53b and the third engagement piece portion 53c are located at the pseudo lock position, both the engagement piece portions 53b and 53c and the engagement portion It is possible to make it difficult to engage the engaging recesses 37c and 37a.

  As described above, in the seat slide device 10 according to the first embodiment, the lower rail 30 has the engaging portion 37 in which the three engaging recesses 37a to 37c are formed at equal intervals on the outer edge portion 36 thereof. A plurality of outer edge portions 36 are provided in the longitudinal direction. Further, the same number of engagement pieces 53a to 53c as the respective engagement recesses 37a to 37c are formed on the lock lever 50 that is supported by the upper rail 20 so as to be tiltable. The outer edge portion 36 of the lower rail 30 is connected to the first engagement piece portion 53a when the second engagement piece portion 53b and the third engagement piece portion 53c are located at the pseudo lock position in each engagement portion 37. The abutting first outer edge portion 36a is formed so as to protrude from the other outer edge portion toward the first engaging piece portion 53a.

For this reason, when the first engagement piece 53a of the lock lever 50 located at the pseudo-lock position abuts on the first outer edge 36a of the outer edge 36 of the lower rail 30, the lock 52 of the lock lever 50 is engaged with each engagement. As the combined pieces 53a to 53c are separated from the tilting center L, they are tilted so as to be separated from the outer edge 36 except the first outer edge 36a. Since the lock portion 52 is tilted in this manner, even if the second engagement piece portion 53b and the third engagement piece portion 53c are located at the pseudo lock position, the engagement pieces 53b and 53c are engaged with each other. The engagement recesses 37c and 37a of the portion 37 can be made difficult to engage with each other.
Therefore, the occurrence of the pseudo lock state can be suppressed.

[Second Embodiment]
Next, a second embodiment of the present invention will be described with reference to FIG. FIG. 7 is a side view showing a main part of the seat slide device 10 according to the second embodiment of the present invention.

  The seat slide device 10 according to the second embodiment is different from the seat slide device according to the first embodiment in that a lower rail 30a is employed instead of the lower rail 30 described in the first embodiment. Accordingly, substantially the same components as those in the seat slide device of the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

  As shown in FIGS. 7A and 7B, the outer edge portion 36 of the lower rail 30a is a portion between each of the engaging portions 37 between the second engaging recess 37b and the third engaging recess 37c. The two outer edge portions 36c are tapered so as to be separated from the respective engaging pieces 53a to 53c as being separated from the second engaging concave portion 37c. Further, the third outer edge portion 36d, which is a portion between the third engagement recess portion 37c and the first engagement recess portion 37a, is separated from each of the engagement piece portions 53a to 53c as compared with the other outer edge portions. Is formed.

  Accordingly, the second engagement piece 53b and the third engagement piece 53c are the second outer edge portion in a state where the first engagement piece 53a is in contact with the lower end portion 36b of the first outer edge portion 36a on the upper surface thereof. When contacting the 36c and the third outer edge portion 36d, the tilting of the lock portion 52 becomes larger than when the second outer edge portion 36c and the third outer edge portion 36d are not provided.

  For this reason, in the seat slide device 10 according to the second embodiment, the tilt angle of the lock portion 52 located at the pseudo lock position can be further increased without narrowing the tilt range of the lock lever 50. Thereby, generation | occurrence | production of a pseudo lock state can be suppressed more, without impairing the operativity of the operation lever 70. FIG.

The present invention is not limited to the above embodiments, and may be embodied as follows. Even in this case, the same operations and effects as those of the above embodiments can be obtained.
(1) The number of the engaging portions 37 is not limited to the three engaging recesses, but may be two or four or more. In that case, each engagement piece of the lock portion 52 is formed in accordance with each of the engagement recesses.

  In particular, when the second outer edge portion 36c and the third outer edge portion 36d are provided on the outer edge portion 36 as in the second embodiment, the outer edge portion 36 includes the second engagement recess portion 37b and the second engagement recess portion. The second outer edge portion 36c, which is a portion between the third engagement recess portion 37c adjacent to 37b, is formed so as to be separated from each engagement piece portion as the distance from the second engagement recess portion 37b increases. Each part of the outer edge portion 36 existing between the third engagement recess portion 37c and the first engagement recess portion 37a is separated from each engagement piece portion as compared with other outer edge portions, like the third outer edge portion 36d. Each is formed to be spaced apart.

(2) Each engagement portion 37 is not limited to being formed at three locations on the outer edge portion 36, and may be formed at two locations or four or more locations.

(3) Each of the engaging pieces 53a to 53c is not limited to being formed by forming two lock holes 52a in the flat plate, and for example, each of the three pieces from the center of the lock portion 52 toward both sides. You may comprise by forming so that a part may protrude.

It is a side view which shows the structure outline | summary of the vehicle seat by which the seat slide apparatus which concerns on this 1st Embodiment is installed. FIG. 2 is a partially exploded perspective view of the seat slide device of FIG. 1. It is a fragmentary sectional view of the seat slide apparatus of FIG. It is sectional drawing by the cut surface equivalent to 4-4 lines shown in FIG. It is a side view which shows the detailed shape of the engaging part of a lower rail. It is explanatory drawing for demonstrating the engagement state of the engaging part of a lower rail, and the locking part of a lock lever, and FIG. 6 (A) is the locked state which each engagement piece part and each engagement recessed part engage. FIG. 6B shows a state in which the first engagement piece abuts against the first edge. It is a side view which shows the principal part of the seat slide apparatus which concerns on 2nd Embodiment of this invention. It is explanatory drawing for demonstrating a pseudo lock state.

Explanation of symbols

10 ... Seat slide device,
20 ... Upper rail (upper rail member)
30, 30a ... Lower rail (lower rail member)
36 ... Outer edge portion 36a ... First outer edge portion 36c ... Second outer edge portion 36d ... Third outer edge portion 37 ... Engagement portion 37a ... First engagement recess portion 37b ... Second engagement recess portion 37c ... Third engagement recess portion 50 ... Lock lever (lock member)
52 ... Locking part 52a ... Locking hole 53a ... First engagement piece 53b ... Second engagement piece 53c ... Third engagement piece 70 ... Operation lever (operation member)
L ... Center of tilt

Claims (2)

A lower rail member that is fixed to the vehicle body and has a plurality of engaging portions formed at equal intervals in the outer edge portion in the longitudinal direction of the outer edge portion.
An upper rail member fixed to the seat and slidably provided with respect to the lower rail member;
A locking member that is supported by the upper rail member so as to be tiltable, and is formed so that the same number of engaging pieces as the engaging concave portions can be engaged and disengaged;
An operation member that tilts the locking member about the tilting center to engage and disengage each engaging piece and each engaging recess;
A seat slide device comprising:
When the lock member and the engaging portion are engaged, the first engaging piece portion that is the most distant from the tilting center and the second engaging piece that is closest to the tilting center among the engaging piece portions. The portion is engaged with the first engagement recess and the second engagement recess among the engagement recesses,
The outer edge portion is located at each of the engaging portions when the other engaging piece portion except the first engaging piece portion is engageable with the other engaging recessed portion except the second engaging recessed portion. The seat slide device is characterized in that a first edge portion, which is a part in contact with the first engagement piece portion, is formed so as to protrude from the other outer edge portion toward the first engagement piece portion side. The outer edge portion is in each of the engaging portions,
A portion between the second engagement recess and the third engagement recess adjacent to the second engagement recess is formed so as to be separated from each engagement piece as the distance from the second engagement recess is increased. As
The portion between the third engagement recess and the first engagement recess is formed so as to be separated from each of the engagement pieces as compared with other outer edge portions. The seat slide device described in 1.

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