JP2008279805A - Seat sliding device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a seat sliding device capable of reducing the number of parts and improving the work efficiency in assembly. <P>SOLUTION: In a locking member 50 for locking an upper rail 20 and a lower rail 30 in accordance with the operation of an operation lever 80 to prevent them from moving relatively, two shaft parts 54a extended in the reverse directions for each other on both of supporting pieces 54 are pressed into a round shape of an inner corner wall 26 being a connection section for connecting an upper wall 21 with a side wall 22 of the upper rail 20 and are turnably supported on the upper rail 20 to switch to a locking condition or a lock release condition. <P>COPYRIGHT: (C)2009,JPO&INPIT

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, a vehicle seat slide device shown in Patent Document 1 is known as a seat slide device for adjusting a vehicle seat back and forth. In this vehicle seat slide device locking mechanism, a lock lever claw that is tiltably fixed to an upper rail engages with an engagement hole of the lower rail and an engagement hole and a notch of the upper rail, so that the upper rail is connected to the lower rail. To lock it immovable. When the lock lever is tilted by the operation of the operation lever and the pawl is pulled out from the notch of the upper rail and the engagement hole of the lower rail, the lock is released.

  The lock lever is formed on the upper rail and a pair of front and rear balls that are engaged and abutted from the front and rear to a pair of front and rear bearing portions that are formed at both front and rear ends and extend in the lateral direction and are formed in a substantially hemispherical shape. A pair of front and rear curled portions that are formed in a cylindrical shape and press each ball against each bearing portion are assembled to the upper rail so as to be tiltable.

  Further, in the lock mechanism of the vehicle seat slide device disclosed in Patent Document 2 below, the lock claw of the latch lever that is rotatably supported by the upper rail is fixed to the lower rail via the support hole of the claw support plate. By engaging with the fitting hole of the lock plate, the upper rail is locked so as not to move with respect to the lower rail. Then, by operating the loop handle, which is an operating lever, the operating portion of the holder coupled to the loop handle presses the input arm of the latch lever protruding outward from the upper rail to rotate the latch lever. The lock claw is pulled out from the fitting hole of the lock plate and the support hole of the claw support plate, and the lock is released.

The latch lever is rotatably supported by the upper rail via the shaft portion of the support bracket and the shaft portion of the lifting restriction piece.
JP 2002-154356 A Japanese Patent Laid-Open No. 2004-210258

  By the way, in the configuration of each lock mechanism described above, the lock lever in Patent Document 1 is configured to be tiltably supported on the upper rail by the curl portion through the balls at the bearing portions at both front and rear ends. The number of points increases and the support structure becomes complicated.

  In addition, the latch lever in the lock mechanism of Patent Document 2 is not as complex as the lock lever in Patent Document 1, but is lifted from the shaft portion of the support bracket in order to rotatably support the latch lever on the upper rail. There is a problem that it is necessary to provide the shaft portion of the restricting piece, and the assembling workability for assembling the latch lever to each shaft portion is deteriorated.

  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 capable of reducing the number of parts and improving the assembly workability.

  In order to achieve the above object, in the seat slide device according to claim 1, the lower rail member (30) fixed to the vehicle body (B) and the lower rail member fixed to the seat (S) are provided. The upper rail member (20) provided slidably with respect to the lower rail member, the lower rail side engaged portion (35a) of the lower rail member, and the upper rail side engaged portion (22a, 23a) of the upper rail member. A lock member (50) having a detachable lock side engagement portion (52), a lock state in which the lock side engagement portion engages with the lower rail side engagement portion and the upper rail side engagement portion, and its lock An operation member (80) for rotating the lock member to switch between a lock release state for releasing the state, and a seat slide device comprising the lock unit Includes two shaft portions (54a) that are collinear with each other and extend in opposite directions, and these two shaft portions are connected to the upper wall (21) and the side wall (22) of the upper rail member ( 26) and is supported in a rotatable manner so as to be switched between the locked state and the unlocked state.

  In the invention of claim 1, the lock member is brought into a locked state and an unlocked state by pressing two shaft portions extending in opposite directions against the connecting portion between the upper wall and the side wall of the upper rail member. The upper rail member is rotatably supported so as to be switched.

As a result, the lock member can be pivotally supported on the upper rail member without using a special support member, so the number of parts can be reduced by eliminating the parts for pivotally supporting the lock member. can do.
Further, since the both shaft portions of the lock member are simply pressed against the connecting portion between the upper wall and the side wall of the upper rail member, the assembly work is facilitated.
Therefore, the number of parts can be reduced and the assembly workability can be improved.

  According to a second aspect of the present invention, the lock member includes the two shaft portions and a support piece that protrudes outward from the opening of the upper rail member. A biasing member that biases the support piece in a direction (lock direction) in which the lock side engagement portion engages with the lower rail side engagement portion and the upper rail side engagement portion is provided.

  As a result, the assembly work of the lock member and the urging member that urges the lock member in the locking direction can be performed outside the upper rail member. As compared with the case of assembling the force member, the assembling workability can be further improved.

  In the invention of claim 3, the urging member is formed by bending a wire-like elastic member into a substantially C shape. For this reason, for example, by elastically deforming both ends of the elastic member and engaging the support piece, the support piece of the lock member can be urged in the locking direction with a simple configuration, and the lock member and The assembly work with the urging member can be further improved.

  Embodiments of the present invention will be described below 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 present embodiment is installed. FIG. 2 is an exploded perspective view of the seat slide device 10 of FIG. FIG. 3 is a cross-sectional view of the seat slide device 10 of 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 feet 31, the lock member 50 that fixes (locks) the upper rail 20 and the lower rail 30 so as not to move relative to each other according to the operation of the operation lever 80, and the lock A biasing member 60 that biases the locking member 50 so that the member 50 locks the upper rail 20 and the lower rail 30, and both tilting portions 82 (described later) of the operation lever 80 that are disposed in the upper rail 20. A pair of holders 70 that are tiltably supported on the upper rail 20 are provided (only one is shown in FIGS. 1 and 2), And an operating lever 80 which is operated to switch between an unlocked state for releasing the locked state and the lock state between the upper rail 20 and lower rail 30 by the lock member 50.

4 is a cross-sectional view taken along the line 4-4 shown in FIG.
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 (not shown), a side wall 22 suspended from both ends of the upper wall 21, and a lower end of each side wall 22. The connecting portion 23 is bent upward and bent, and the inclined portion 24 holds the first steel ball 41 of the retainer 40 in the space between the lower rail 30 and the connecting portion 23.

  A locking piece 21a having an inverted L-shaped cross section is formed on the upper wall 21 of the upper rail 20 so as to protrude outward from the upper wall 21. In the vicinity of the locking piece 21a, the upper wall 21 Two openings 25 opening from the side wall 22 to the side wall 22 are formed.

  The side wall 22 opposite to the side wall 22 where both openings 25 are formed and the connecting portion 23 connected to the side wall 22 engage with each lock claw 52 (described later) of the lock member 50, for example, Five notches 22a and 23a are provided, respectively.

  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 the front and rear feet 31, and extends upward from both ends of the bottom wall 32. A first side portion 33, a flange portion 34 provided substantially parallel to the bottom wall 32 from the upper end of each first side portion 33 toward the center, and a first side portion from the terminal of each flange portion 34 toward the bottom wall 32. 33 and a second side portion 35 extending substantially in parallel.

  The second side portion 35 corresponding to each notch 22a of the side wall 22 and each notch 23a of the connecting portion 23 is provided with five or more notches 35a formed in the same manner as the notches 22a and 23a. .

  The upper rail 20 is arranged such that the upper wall 21 faces the bottom wall 32 of the lower rail 30 and the inclined portion 24 of the upper rail 20 enters the space between the first side portion 33 and the second side portion 35 of the lower rail 30. Has been. 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.

FIG. 5 is a detailed perspective view of the locking member 50 of FIG.
The lock member 50 can be engaged with a plate-like contact portion 51 that contacts a distal end portion 83 (described later) of the operation lever 80, the notches 22 a and 23 a of the upper rail 20, and the notches 35 a of the lower rail 30. Five locking claws 52, a connecting piece 53 having an inverted L-shaped cross section connected to both ends of the abutting portion 51 opposite to each locking claw 52, The support piece 54 is configured to extend outward from the end in parallel to each other.

  A shaft portion 54a is formed at the center of each of the support pieces 54 and extends in the opposite direction on the same line, and at each distal end portion of the support pieces 54, the biasing member 60 is provided. An engagement hole 54b for engaging with both end portions 61 (described later) is formed.

  The urging member 60 is formed such that a wire-like elastic member is bent in a substantially C shape and both end portions 61 are coaxially opposed to each other with a predetermined distance (see FIG. 2). The urging member 60 locks the fixing portion 62 to the locking piece 21 a of the upper wall 21 of the upper rail 20 and elastically deforms both end portions 61 so as to approach the fixing portion 62 to support both of the locking members 50. By engaging with each engagement hole 54 b of the piece 54, the two support pieces 54 are urged in a direction away from the fixing portion 62.

FIG. 6 is a detailed perspective view of the holder 70 of FIG.
As shown in FIGS. 2 and 6, the holder 70 includes a holder main body 71 formed of a resin material such as synthetic resin, a plate-like spring member 72, and a clip-like elastic member 73.
The holder main body 71 has two through holes 71a for inserting the tilting portion 82 of the operation lever 80, and two perpendicular to the through holes 71a and extending outward from both side walls of the holder main body 71. A shaft portion 71b is provided.

  In addition, a cylindrical portion 71c is provided on one side of the portion of the holder main body 71 where the through hole 71a is formed, and the cylindrical portion 71c communicates with the through hole 71a so as to face each other. A slit 71d is formed.

  A cylindrical portion 71e having a height lower than the plate thickness of the plate spring member 72 is formed at the center of the upper wall of the holder body 71, and at both ends of the upper wall of the holder body 71 on the shaft portion 71b side. In addition, a locking portion 71f having an inverted L-shaped cross section is provided.

  The plate-like spring member 72 includes a flat fitting portion 72a, inclined portions 72b extending from both ends of the fitting portion 72a, and fitting portions 72a from the respective end portions of both inclined portions 72b. It is comprised with the flat contact part 72c extended substantially horizontally.

  The width of the fitting portion 72a is wider than the width of the inclined portion 72b, and a portion wider than the width of the inclined portion 72b is fitted to the locking portion 71f of the holder body 71, and the center of the fitting portion 72a is fitted. The plate-like spring member 72 is fitted to the holder main body 71 by engaging the engagement hole 72d provided in the portion with the cylindrical portion 71e of the holder main body 71 (see FIG. 6).

  The elastic member 73 is formed so as to be close to the both end vicinity portions 73a of the wire-like urging member bent in a U shape (see FIG. 4).

  The operating lever 80 includes a gripping portion 81 disposed outside the upper rail 20, two tilting portions 82 that extend in parallel from both ends of the gripping portion 81 and are disposed in the upper rail 20, and these tilting motions. A distal end portion 83 formed on the distal end side of the portion 82 and having a smaller diameter than the tilting portion 82 (see FIGS. 1 and 2).

  As shown in FIG. 4, the lock member 50 configured as described above is configured so that the tip ends of both support pieces 54 protrude outward from both openings 25 of the upper rail 20. Both end portions 61 of the urging member 60 are engaged with the engaging holes 54b, respectively, and assembled to the upper rail 20.

  At this time, the lock member 50 has the urging member 60 attached to an R shape in which the shaft portions 54a of the both support pieces 54 are formed at the connecting portion (hereinafter also referred to as the inner corner wall 26) between the upper wall 21 and the side wall 22. By being pressed with force, the upper rail 20 is rotatably supported along the R shape of the inner corner wall 26 so as to switch between the locked state and the unlocked state.

  Further, the lock member 50 is moved in a direction in which each lock claw 52 is engaged with each notch 22a, 23a of the upper rail 20 and each notch 35a of the lower rail 30 (hereinafter referred to as a lock direction) by the urging force of the urging member 60. It is energized.

  In addition, as shown in FIG. 3, the holder 70 has both insertion portions 22 b provided at predetermined positions on both side walls 22 of the upper rail 20 with both shaft portions 71 b of the holder main body 71 fitted with the plate spring members 72. For example, it is supported by the upper rail 20 so as to be rotatable by press-fitting in a state where there is no gap.

  At this time, both the abutting portions 72c of the plate-like spring member 72 abut on the upper wall 21 in the direction perpendicular to the both shaft portions 71b of the holder main body 71 to exert an elastic action, whereby the holder main body 71 is The through hole 71a is biased so as to be parallel to the upper wall 21. In addition, the elastic member 73 is assembled so that the portions 73 a near both ends thereof engage with both slits 71 d of the holder main body 71.

  When the tilting portion 82 and the tip portion 83 of the operation lever 80 are inserted into the through hole 71a of the holder main body 71 of the holder 70, the portions 73a in the vicinity of both ends of the elastic member 73 are slit 71d by the elastic action at a predetermined insertion position. The tilting portion 82 is fixed to the holder main body 71 so as not to be relatively movable by engaging with both notches 82 a of the tilting portion 82 via. As a result, the operation lever 80 is supported by the upper rail 20 via the holder 70 so as to be tiltable. At that time, the tip 83 abuts against the abutment 51 of the lock member 50 (see FIG. 3).

7A is a cross-sectional view showing a locked state by the lock member 50 at a cut surface corresponding to the line 7-7 shown in FIG. 3, and FIG. 7B shows a unlocked state by the lock member 50. It is sectional drawing.
In the seat slide device 10 configured as described above, when the gripping portion 81 of the operation lever 80 is not operated, the lock member 50 is centered on the shaft portions 54a of the two support pieces 54 by the biasing force of the biasing member 60. The lock claw 52 is biased in the locking direction, and maintains a state in which each lock claw 52 is engaged with any one of the notches 22 a and 23 a of the upper rail 20 and the notches 35 a of the lower rail 30. As a result, the upper rail 20 and the lower rail 30 are locked so as not to move relative to each other (see FIG. 7A).

  When the gripping portion 81 of the operation lever 80 is operated so as to move upward in such a locked state by the lock member 50, the tilting portion 82 of the operation lever 80 together with the holder main body of the holder 70 has both shaft portions 71b. The tip 83 is tilted to move downward about the center.

  The shaft portions of the two support pieces 54 are pressed against the R shape of the inner corner wall 26 when the abutment portion 51 of the lock member 50 is urged downward by the tip 83 moving downward. It rotates in the anti-lock direction α around 54a (see FIG. 7B). As a result, the engagement of each lock claw 52 with each notch 22a, 23a of the upper rail 20 and each notch 35a of the lower rail 30 is released, so that the upper rail 20 and the lower rail 30 can move relative to each other. Become.

  Then, after the relative position between the upper rail 20 and the lower rail 30 is adjusted, when the gripping portion 81 of the operating lever 80 is moved downward so as to return to the original position, the tip portion 83 biases the contact portion 51. When the lock member 50 is released, the lock member 50 rotates in the lock direction around the shaft portions 54 a of the support pieces 54 by the biasing force of the biasing member 60. Thereby, each lock claw 52 engages with any one of the notches 22a and 23a of the upper rail 20 and each of the notches 35a of the lower rail 30, so that the upper rail 20 and the lower rail 30 cannot be relatively moved again. (See FIG. 7A).

  As described above, in the seat slide device 10 according to the present embodiment, the lock member 50 has the two shaft portions 54a extending in the opposite directions by the two support pieces 54, and the upper wall 21 and the side wall of the upper rail 20 When the inner corner wall 26 is pressed into an R shape, which is a connection portion with the upper wall 22, the upper rail 20 is rotatably supported so as to switch between the locked state and the unlocked state.

Thereby, since the lock member 50 can be rotatably supported on the upper rail 20 without using a special support member, the parts for supporting the lock member 50 so as to be rotatable can be eliminated and the number of parts can be reduced. Can be reduced.
Further, since the both shaft portions 54a of the lock member 50 are simply pressed against the R shape of the inner corner wall 26 of the upper rail 20, the assembling work is facilitated.
Therefore, the number of parts can be reduced and the assembly workability can be improved.

  In the seat slide device 10 according to the present embodiment, the lock member 50 includes both support pieces 54 that have both shaft portions 54 a and protrude outward from both the opening portions 25 of the upper rail 20. Then, both support pieces 54 are urged in the locking direction so that each lock claw 52 engages with any one of the notches 22a and 23a of the upper rail 20 and each of the notches 35a of the lower rail 30. A biasing member 60 is provided.

  As a result, the assembly work of the lock member 50 and the urging member 60 that urges the lock member 50 in the locking direction can be performed outside the upper rail 20. Compared with the case of assembling the member and the biasing member, the assembling workability can be further improved.

  Furthermore, in the seat slide device 10 according to the present embodiment, the urging member 60 bends the wire-like elastic member into a substantially C shape so that both end portions 61 are coaxially opposed to each other at a predetermined distance. Is formed. Therefore, both end portions 61 of the urging member 60 are elastically deformed and engaged with the respective engagement holes 54b of the both support pieces 54 of the lock member 50, so that the both support pieces 54 of the lock member 50 can be formed with a simple configuration. Can be urged in the locking direction, and the assembly work of the locking member 50 and the urging member 60 can be further improved.

In addition, this invention is not limited to the said embodiment, You may actualize as follows, and even in that case, an effect | action and effect equivalent to the said embodiment are acquired.
(1) The urging member 60 is not limited to being formed such that a wire-like elastic member is bent in a substantially C shape so that both end portions 61 are coaxially opposed to each other at a predetermined distance. It may be a member that is engaged with the upper wall 21 of the rail 20 and biases both the support pieces 54 of the lock member 50 in the lock direction.

(2) The connecting portion between the upper wall 21 and the side wall 22 of the upper rail 20 is not limited to being formed in an R shape like the inner corner wall 26, and may be a shape that is connected at a substantially right angle. .

(3) The plate-like spring member 72 is fitted from the flat fitting portions 72a, the inclined portions 72b extending from both ends of the fitting portions 72a, and the respective end portions of both inclined portions 72b. The upper wall 21 of the upper rail 20 is not limited to be configured with a flat plate-like contact portion 72c extending horizontally to the joint portion 72a, but in the front and rear directions perpendicular to both shaft portions 71b of the holder body 71. Any shape that has two or more abutting portions that abut each other may be used.

(4) The elastic member 73 is not limited to be formed in a clip shape so as to be close to the both end vicinity portions 73a of the wire-like urging member bent in a U-shape, but the holder main body 71 by its elastic action. Any shape that engages with the engagement hole 82a of the tilting portion 82 through the slit 71d may be used.

It is a side view showing the composition outline of the vehicular seat in which the seat slide device concerning this embodiment is installed. It is a disassembled perspective view of the seat slide apparatus of FIG. It is sectional drawing of the seat slide apparatus of FIG. It is sectional drawing by the cut surface equivalent to 4-4 lines shown in FIG. FIG. 3 is a detailed perspective view of the lock member of FIG. 2. It is a detailed perspective view of the holder of FIG. FIG. 7A is a cross-sectional view showing a locked state by a lock member at a cut surface corresponding to line 7-7 shown in FIG. 3, and FIG. It is.

Explanation of symbols

10 ... Seat slide device,
DESCRIPTION OF SYMBOLS 20 ... Upper rail (upper rail member), 21 ... Upper wall, 21a ... Locking piece, 22 ... Side wall, 22a, 23a ... Notch (upper rail side engaged part), 22b ... Insertion hole, 25 ... Opening 26 ... Inner corner wall,
30 ... Lower rail (lower rail member), 35a ... Notch (lower rail side engaged portion),
DESCRIPTION OF SYMBOLS 50 ... Lock member, 51 ... Contact part, 52 ... Lock claw, 54 ... Supporting piece, 54a ... Shaft part, 54b ... Engagement hole,
60 ... biasing member, 61 ... end, 62 ... fixing part,
70 ... Holder, 71 ... Holder body, 71a ... Through hole, 71b ... Shaft part, 71d ... Slit, 72 ... Plate spring member, 72c ... Contact part, 73 ... Clip,
80 ... operating lever (operating member), 81 ... gripping part, 82 ... tilting part, 82a ... notch, 83 ... tip part,
S: Vehicle seat (seat), B: Vehicle floor (vehicle body), α: Anti-locking direction.

Claims (3)

A lower rail member fixed to the vehicle body;
An upper rail member fixed to the seat and slidably provided with respect to the lower rail member;
A lock member having a lock side engagement portion that can be engaged with and disengaged from the lower rail side engaged portion of the lower rail member and the upper rail side engaged portion of the upper rail member;
An operation of rotating the lock member to switch between a locked state in which the lock-side engaging portion engages with the lower rail-side engaging portion and the upper rail-side engaging portion and a unlocked state in which the locked state is released. A member,
A seat slide device comprising:
The lock member includes two shaft portions that are collinear with each other and extend in opposite directions, and these two shaft portions are pressed against a connecting portion between the upper wall and the side wall of the upper rail member, and the lock member A seat slide device, wherein the seat slide device is rotatably supported to switch between a state and an unlocked state. The lock member includes a support piece that has the two shaft portions and projects outward from the opening of the upper rail member,
2. The seat according to claim 1, further comprising a biasing member that biases the support piece in a direction in which the lock-side engagement portion engages with the lower rail-side engagement portion and the upper rail-side engagement portion. Slide device.   3. The seat slide device according to claim 2, wherein the urging member is formed by bending a wire-like elastic member into a substantially C shape.

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