JP4019501B2 - Vehicle seat slide device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vehicle seat slide device.
[0002]
[Prior art]
A seat that is slidable in the longitudinal direction of the vehicle body is normally slidably engaged with a pair of left and right upper rails that are attached to the vehicle body and extend in the longitudinal direction. . Further, locking holes are formed at predetermined pitches in the front-rear direction on the inner side surfaces of the pair of left and right lower rails, and the engaging portions of the locking members provided on the seat are engaged, that is, inserted into the locking holes. Thus, the locked state in which the sliding of the seat is regulated is set, and the unlocking state in which the sliding of the seat is possible is made by releasing the engaging portion from the locking hole.
[0003]
The engaging portion is formed as a pair of left and right rod-shaped locking members extending in the front-rear direction, and the locking members are rotatably held on a seat, for example, an upper rail via a holding member. When one lock member is operated to rotate in the unlocking direction, the pair of left and right lock members are linked by the linkage member so that the other lock member is also rotated in the unlocking direction.
[0004]
A plurality of the holding members are provided at intervals in the longitudinal direction with respect to one locking member. And while the engaging part of a lock member is provided in the longitudinal direction one end part side of a lock member, in the vicinity of the specific holding member in the position away from the engaging part among the several holding members in the longitudinal direction of a lock member The linkage member is positioned.
[0005]
By the way, at the time of a front collision, the seat (seat cushion) receives a large downward load from an occupant restrained by the seat belt, so that the central portion thereof is deformed not a little downward. Such downward deformation of the seat cushion increases the distance between the pair of left and right upper rails attached to the seat, that is, the distance between the pair of left and right holding members holding the lock member. And when the space | interval of a pair of right and left holding member becomes large, it will bring about the pulling effect | action of a linkage member, and it will become easy to produce the situation where a lock member rotates in a lock release direction from a locked state.
[0006]
In order to prevent the locking member in the locked state from being inadvertently released into the unlocked state at the time of a frontal collision, Japanese Patent Publication No. 6-17092 and Japanese Patent Publication No. 5-65378 disclose a linkage path by a connecting member. It has been proposed to provide an inertia-actuated linkage release mechanism that releases linkage by inertia at the time of a forward collision.
[0007]
[Problems to be solved by the invention]
However, the inertia-actuated linkage releasing mechanism is considerably complicated in structure and greatly increases the cost. Further, since the inertia is used, the certainty of the operation is not fully satisfactory. In order to solve such a problem, it is conceivable that a pair of left and right lock members are linked by the inner wire using an inner / outer double connection wire as the linking member. However, the inner and outer double connection wires are also very expensive.
[0008]
The present invention has been made in view of the circumstances as described above, and the object thereof is to achieve a regulation of an increase in the distance between the pair of left and right lock members in a forward collision with a reliable and inexpensive structure. An object of the present invention is to provide a vehicle seat slide device.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, the following solution is adopted in the present invention. That is,
A pair of left and right lock members extending in the front-rear direction are rotatably held by a seat supported by the vehicle body so as to be slidable in the front-rear direction, while the lock member is engaged with the vehicle body side according to the rotation of the lock member. A pair of left and right engaging portions that are engaged and disengaged, and when the engaging portion is engaged with the engaging portion, the sliding state of the seat is restricted, and the engagement When the portion is disengaged from the locking portion, the unlocked state in which the sliding of the seat is allowed,
A specific holding member is provided on the seat at a position spaced apart from the engagement portion in the longitudinal direction of the lock member, and the lock member is rotatably held;
In the vicinity of the specific holding member, the pair of left and right lock members are linked together, and when one of the pair of left and right lock members is rotated in the unlocking direction, the other lock member is rotated in the unlocking direction. A linking member is provided,
A pair of right and left lock members is connected in the vicinity of the specific holding member, and a restricting member is provided to restrict an increase in the horizontal interval between at least the pair of left and right lock members in the vicinity of the specific holding member.
It is like that. A preferred mode based on the above solution is as described in claim 2 and the following claims.
[0010]
【The invention's effect】
According to the first aspect, the pair of left and right lock members in the vicinity of the linking member at the time of a front collision can be obtained by a simple structure in which the pair of left and right lock members are connected by a restriction member that restricts an increase in the distance between them. An increase in the interval between the lock members can be reliably controlled.
[0011]
According to the second aspect, by connecting the specific holding members that rotatably hold the lock member with the restriction member, it is not necessary to separately provide a member to which the restriction member is connected to the lock member. Therefore, it is more preferable.
According to the third aspect, the connection between the regulating member and the specific holding member can be made to have a very simple structure.
[0012]
According to the fourth aspect of the present invention, the locking portion can be configured using the lower rail, so that the structure as a whole can be simplified.
According to the fifth and sixth aspects, a more specific structure of the restricting member is provided. However, since the restricting member is constituted by one linear member, it is extremely simple and inexpensive.
[0013]
According to claim 7, it is possible to prevent an increase in the distance between the pair of left and right lock members in the vicinity of the specific holding member by utilizing the deformation of the specific holding member. The specific holding member can be easily set so as to be deformed when an external force of a predetermined level or more is applied within the range of the tensile strength of the restricting member, so that it is possible to ensure reliable deformation, that is, secure prevention of unlocking. This is preferable.
[0014]
According to the eighth aspect, attaching the anchor portion to the vehicle body by securing the seat to which the anchor portion is attached in advance to the vehicle body is ensured, which is preferable in terms of improving assemblability. In addition, since the anchor portion is attached to the side portion of the seat, the tendency to increase the distance between the pair of left and right lock members at the time of a forward collision becomes strong, so that the present invention is particularly effective.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
In FIG. 1, the seat S includes a seat back 1 and a seat cushion 2. The seat cushion 2 includes a frame 3 and a cushion body 4 formed thereon. A pair of left and right upper rails 5 extending in the longitudinal direction of the vehicle body is disposed below the frame 3, and the frame 3 is fixed to the upper rail 5 via a bracket 6. Corresponding to the upper rail 5, a pair of left and right lower rails 7 extending in the front-rear direction are fixed to the vehicle body side (vehicle body floor). A lower end portion of the upper rail 5 is slidably engaged with the lower rail 7. By sliding with both rails 5 and 7 as slide rails, the seat S can be slid in the front-rear direction.
[0016]
A pair of left and right lock members 11 extending in the front-rear direction are disposed below the frame 3. When distinguishing between the pair of left and right lock members 11, one is denoted as 11 </ b> L and the other is denoted as 11 </ b> R. As shown in FIG. 2, the lock member 11 is rotatably held by the upper rail 5, that is, the frame 3 via a plurality of, more specifically, a pair of front and rear holding members 12 and 13 (in FIG. 1, the holding member 11 is held). Members 12 and 13 are not shown). As shown in FIG. 1, an engagement claw portion 14 as an engagement portion is fixed to the rear end portion side of the lock member 11 (see also FIG. 6). Further, a locking hole 15 is formed on the inner side surface of the lower rail 7 as a locking portion where the engaging claw portion 14 is engaged and disengaged, that is, inserted and removed (see FIG. 6). A plurality of the locking holes 15 are formed at predetermined pitches in the longitudinal direction of the lower rail 7.
[0017]
The engaging claw portion 14 is located in a portion surrounded by the rear holding member 13 shown in FIG. In addition, a return spring that urges the lock member 11 in a direction (lock direction) in which the engagement claw portion 14 is inserted into the engagement hole 15 is incorporated in a portion surrounded by the rear holding member 13. Yes. As shown in FIGS. 1 and 2, the front end portion of one lock member 11L is an operation portion 11a bent by approximately 90 degrees, and by lifting the operation portion 11a upward, When the locking member 11L is rotated in the unlocking direction, the locking claw portion 14 is detached from the locking hole 15 and the operating force on the operating portion 11a is released, one of the locking members 11L is locked by the return spring. Rotating in the direction, the locking claw portion 14 is in the locked state inserted into the locking hole 15.
[0018]
As shown in FIGS. 2, 3, and 5, a coupling lever 21 is fixed to the pair of left and right lock members 11 in the vicinity of the front holding member 12 serving as the specific holding member. The connecting levers 21 are connected by a single connecting wire 22 as a thin connecting member. As a result, when the operating portion 11a is lifted and one lock member 11L is rotated in the unlocking direction as described above, this rotation is transmitted to the other lock member 11R via the connecting wire 22, The other lock member 11R is also rotated in the unlocking direction.
[0019]
A pair of left and right specific holding members 12 positioned in front are connected by a regulating member 23 as shown in FIGS. The restricting member 23 is composed of a single linear member that has an excellent tensile strength and extends substantially linearly. In the embodiment, the restricting member 23 is composed of a single piano wire. In order to connect the specific holding member 12 and the regulating member 23, a connection hole 12 a is formed in the specific holding member 12. The linear regulating member 23 is connected in a state where each end thereof is inserted through the connecting hole 12a.
[0020]
That is, the restricting member 23 includes a main body portion 23a that extends long and linearly, and a folded portion that is formed at each end portion of the main body portion 23a as shown in FIG. 23b, a free end portion 23c that is formed at the distal end portion of the folded portion 23b and extends substantially parallel to the main body portion 23a, and an engagement that is formed in a hook shape at the distal end portion of the free end portion 23c and surrounds the main body portion 23a approximately half a circumference. Part 23d. Further, a tip portion extending substantially parallel to the main body portion 23a is formed from the engaging portion 23d portion, and this tip portion is integrated with the main body portion 23a using, for example, a tube member fitted to the main body portion 23a. You can also
[0021]
The tensile strength of the restricting member 23 is set such that the pair of left and right specific holding members 12 formed of a metal plate such as an iron plate can be sufficiently deformed. In order to facilitate plastic deformation of the specific holding member 12, the specific holding member 12 is in a free state with a predetermined length from the fixing portion (welding or bolt fixing) to the upper rail 5 in the front-rear direction (front in the embodiment). It has a plate-like free end portion 12b that extends. The free end portions 12b of the pair of left and right specific holding members 12 are formed in a plate shape extending in parallel with each other. A plate-like bent portion 12c is formed that is bent approximately 90 degrees from the tip of the free end portion 12b inward, that is, toward the other free end portion 12b. A holding hole 12d through which the lock member 11 is rotatably inserted is formed, and the connecting hole 12a is formed. As a result, when a pulling force is applied to the bent portion 23d via the restricting member 23, the specific holding member 12 is easily inward from the vicinity of the base end portion (fixed portion to the upper rail 5) of the free end portion 12b. It is easily deformed to the side (direction toward the other specific holding member 12).
[0022]
As shown in FIG. 1, left and right anchor portions 31 and 32 of a three-point seat belt 30 are fixed to the frame 3 of the seat cushion 2 at the left and right ends thereof. Thus, after the anchor portions 31 and 32 are fixed to the frame 3 in advance under a wide working space, the work of fixing the anchor portions 31 and 32 to the vehicle body is omitted by attaching the seat S to the vehicle body. Become.
[0023]
Here, when considering a frontal collision, a load (inertial load) from an occupant restrained by the seat belt 30 acts as a force that strongly presses the central portion of the frame 3 downward. The center portion of the frame 3 is deformed by a force that presses the central portion of the frame 3 downward so that the central portion of the frame 3 protrudes downward. Such deformation of the frame 3 increases the distance between the pair of left and right upper rails 5, that is, the pair of left and right holding members 12, 13. This means that a pulling force acts on the connecting wire 22 and the seat The lock member 11 is rotated in the unlocking direction of S.
[0024]
However, the restriction member 23 restricts the distance between the pair of left and right specific holding members 12 from being increased, and the unlocking of the sheet S is restricted. In other words, the force that increases the distance between the pair of left and right specific holding members 12 acts as a pulling force of the restricting member 23, but against this pulling force, the restricting member 23 has a length state before the front collision. The distance between the pair of left and right specific holding members 12 is restricted from being maintained. When the distance between the pair of left and right upper rails 5 increases in the vicinity of the specific holding member 2, the specific holding member 12 is deformed by this amount (centered around the base end portion of the free end portion 12b). Deformation).
[0025]
Even if the distance between the pair of left and right holding members 13 at the rear increases, this is a movement in the direction in which the locked state is maintained, so that there is no problem with unlocking.
[0026]
FIG. 7 shows an example in which the specific holding member 12 is integrally formed with the bracket 6 that connects the upper rail 5 and the frame 3. That is, the connecting leg portion 6a connecting the upper rail 5 and the frame 3 has a substantially U-shaped cross section, and the above-mentioned free end portion 12a is connected to the lower end portion of the connecting leg portion 6a fixed to the upper rail 5 by a body. It is supposed to be extended.
[0027]
Although the embodiment has been described above, the present invention is not limited to this, and includes the following cases, for example. In order to connect the pair of left and right lock members 11 by the regulating member 23, a connecting lever member is attached to the lock member 11 separately from the specific holding member 12 (for example, fixed by welding), and the lever members are regulated. You may make it connect by the member 23. FIG. The locking hole 15 as the locking portion may be formed in a locking member separately fixed to the vehicle body along the lower rail 7.
[0028]
Each step shown in the flowchart or various members such as sensors and switches can be expressed by adding the name of the means to the high-level expression of the function. Further, the object of the present invention is not limited to what is explicitly stated, but also implicitly includes providing what is substantially preferred or expressed as an advantage. Furthermore, the present invention can also be expressed as a method.
[Brief description of the drawings]
FIG. 1 is a partially omitted front front view showing an embodiment of the present invention.
FIG. 2 is a main part perspective view showing a connection relationship between a pair of left and right lock members.
FIG. 3 is a front view of a main part showing a connection relationship between a pair of left and right lock members.
FIG. 4 is a diagram illustrating an example of a connection mode between a regulating member and a specific holding member.
FIG. 5 is a main part front view showing an upper rail, a lower rail, a specific holding member, a lock member, a connecting wire, and a regulating member.
FIG. 6 is a front cross-sectional view of the main part showing the relationship between the engaging portion of the lock member and the locking hole of the lower rail.
FIG. 7 is a perspective view showing an example in which a specific holding member is integrally formed with a connecting bracket between a seat cushion frame and an upper rail.
[Explanation of symbols]
S: Seat 2: Seat cushion 3: Seat cushion frame 5: Upper rail 7: Lower rail 11: Lock member 11L: One lock member 11R: The other lock member 12: Specific holding member 12a: Connecting hole 12b: Free end 12c : Bent portion 12d: holding hole 22: connecting wire (linking member)
23: Restricting member 30: Seat belt 31, 32: Anchor portion

Claims (8)

A pair of left and right lock members extending in the front-rear direction are rotatably held by a seat supported by the vehicle body so as to be slidable in the front-rear direction, while the lock member is engaged with the vehicle body side according to the rotation of the lock member. A pair of left and right engaging portions that are engaged and disengaged, and when the engaging portion is engaged with the engaging portion, the sliding state of the seat is restricted, and the engagement When the portion is disengaged from the locking portion, the unlocked state in which the sliding of the seat is allowed,
A specific holding member is provided on the seat at a position spaced apart from the engagement portion in the longitudinal direction of the lock member, and the lock member is rotatably held;
In the vicinity of the specific holding member, the pair of left and right lock members are linked together, and when one of the pair of left and right lock members is rotated in the unlocking direction, the other lock member is rotated in the unlocking direction. A linking member is provided,
A pair of right and left lock members is connected in the vicinity of the specific holding member, and a restricting member is provided to restrict an increase in the horizontal interval between at least the pair of left and right lock members in the vicinity of the specific holding member.
A vehicle seat slide device characterized by the above. In claim 1,
By engaging the pair of left and right upper rails attached to the seat and extending in the front-rear direction with the pair of left and right lower rails attached to the vehicle body and extending in the front-rear direction, the seat can be slid in the front-rear direction.
The specific holding member is attached to the pair of left and right upper rails such that the specific holding member is positioned on the inner side of the pair of left and right upper rails and the lower rail,
The restriction member connects the pair of left and right specific holding members,
A vehicle seat slide device characterized by the above. In claim 2,
A connection hole is formed in each of the pair of left and right specific holding members,
Each end of the restriction member is connected to the specific holding member in a state inserted in the connection hole.
A vehicle seat slide device characterized by the above. In claim 3,
The locking portion is formed on each inner side surface of the pair of left and right lower rails, and is configured as a plurality of locking holes formed at predetermined pitches in the front-rear direction.
By inserting the engaging member into the locking hole, a locked state in which the sliding of the seat is restricted,
A vehicle seat slide device characterized by the above. In claim 3,
The vehicle seat slide device, wherein the regulating member is a single linear member that has excellent tensile strength and extends substantially linearly. In claim 5,
The vehicle seat slide device, wherein the restricting member is constituted by a piano wire. In any one of Claims 2 thru | or 6,
When a tensile load of a predetermined magnitude or larger is applied to the regulating member, the specific holding member is deformed so that the length of the regulating member does not change, so that the pair of left and right in the vicinity of the specific holding member A vehicle seat slide device characterized in that an increase in the space between the lock members in the left-right direction is restricted. In any one of Claims 1 thru | or 7,
A vehicle seat slide device, wherein an anchor portion of a seat belt is attached to a seat.

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