JP4126876B2 - Seat slide device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a seat slide device. More specifically, the present invention relates to a long lower rail provided along the front-rear direction of the vehicle floor, and is guided and supported so as to be slidable in the longitudinal direction on the long lower rail. The present invention relates to a seat slide device composed of an upper rail attached and fixed to the side.
[0002]
[Prior art]
In general, a vehicle seat is provided with a seat body including a seat cushion and a seat back mounted so as to be rotatable at the rear thereof, and the seat cushion and the like constituting the seat body are front and rear on the vehicle floor surface. By being supported via the slide mechanism, the slide movement can be adjusted in the front-rear direction of the vehicle, and the layout of the seat in the vehicle interior can be variously changed.
[0003]
As such a seat front / rear slide mechanism, a seat slide device comprising a long lower rail mounted on the vehicle floor along the longitudinal direction of the vehicle and an upper rail slidably mounted on the long lower rail is often used. Are known.
[0004]
As shown in FIGS. 6 and 7, in the conventional normal seat slide device 1, the pair of left and right long lower rails 2 includes a main body portion 2a that has an upward substantially U-shape and inner ends from both ends of the main body portion 2a. A flange 2c having an opening 2b is formed.
[0005]
The long lower rail 2 is fixed to the vehicle body mounting bracket 3 via a rivet 3a, and the long lower rail 2 is attached to the vehicle body side by fixing the vehicle body mounting bracket 3 to the vehicle floor surface by bolting or the like. It is done.
[0006]
On the other hand, the pair of left and right upper rails 4 of the seat slide device 1 is formed in a substantially inverted T shape, and the lower horizontal main body 4a is accommodated in the long lower rail 2 so as to be slidable in the front-rear direction. A vertical wall 4b that protrudes upward from the center of the main body 4a, extends upward through the opening 2b of the long lower rail 2, and is attached to the sheet main body (not shown) is formed.
[0007]
Next, as a slide lock mechanism 5 for locking the upper rail 4 at an arbitrary slide position in the lower rail 2, an operation lever 5a is attached to the lock shaft 5b via a bush 5c, and an operation piece is attached to the lock shaft 5b. 5d is attached, and a latch 5f is attached to the operation piece 5d via a rivet lock 5e. Since the lock shaft 5b and the rivet lock 5e as the operation shaft are in the eccentric position, the operation of the operation lever 5a causes the latch 5f to advance and retract from the side of the upper rail 4, and the lock claw 5g of the latch 5f moves to the lower rail. 2 is engaged with and disengaged from the second lock hole 2d to be in the locked state and unlocked state.
[0008]
In addition, in order to fix the latch 5f to the rivet lock 5e, as shown in the figure, after the rivet lock 5e is inserted into the mounting hole 5h of the latch 5f, a fixing composed of three members: a washer 6a, a wave washer 6b, and an E-ring 6c. By assembling the member 6, the latch 5f is attached to the operation shaft. Reference numeral 5i denotes a spring which is attached to the operation lever 5a and constantly biases the latch 5f in the locking direction. Reference numeral 5j denotes a nut for fixing the operation lever 5a and the shaft lock 5b.
[0009]
[Problems to be solved by the invention]
Thus, the slide lock mechanism 5 in the conventional seat slide apparatus 1 has a large number of parts because the latch 5f is fixed to the rivet lock 5e by the three members of the washer 6a, the wave washer 6b, and the E-ring 6c. However, it has been pointed out that the management of parts is troublesome and the assembly process takes a lot of time.
[0010]
Further, in order to attach the three-member fixing member 6 to the outer periphery of the rivet lock 5e projecting downward from the surface of the latch 5f, it is necessary to set the projecting dimension of the rivet lock 5e long. Since the clearance between the lower rail 2 and the head of the rivet 3a for fixing the vehicle mounting bracket 3 is reduced, the rivet lock 5e and the rivet 3a interfere when the upper rail 4 is assembled to the lower rail 2. There is a risk that the assembly workability may be reduced.
[0011]
SUMMARY OF THE INVENTION The present invention has been made in view of such a problem. In a seat slide device comprising a long lower rail attached to a vehicle floor and an upper rail slidably accommodated in the long lower rail, the upper rail is provided. By simplifying the latch fixing structure of the slide lock mechanism attached to the machine, it is possible to reduce the number of parts and assembly man-hours. In addition, assembly work when assembling the upper rail to the lower rail An object of the present invention is to provide a seat slide device that can smoothly perform the above.
[0012]
[Means for Solving the Problems]
The present invention has been made in view of the above-described problems, and a seat slide device according to claim 1 of the present invention includes a long lower rail provided along the front-rear direction of the vehicle floor surface, and a longitudinal length on the long lower rail. In the seat slide device comprising an upper rail that is guided and supported slidably in the direction and is fixed to the seat body side, the long lower rail has a body portion that is substantially U-shaped upward, and both sides of the body portion. A pair of left and right flanges extending inwardly from the front end of the section and forming an opening, and the upper rail has a substantially U-shaped body portion that is downwardly assembled to the long lower rail, and the body A vertical wall projecting upward from the center of the upper wall of the section and projecting upward from the opening of the long lower rail, and a plurality of locks on the side of the main body of the long lower rail. There is provided a lock member having a lock claw that is formed with a hole and is selectively locked to a plurality of lock holes of the long lower rail from the side of the upper rail, and the lock member is operated by an operation lever. A latch having a lock claw is fixed to the lower end side of the operating shaft via a single lock spring.
[0013]
According to the seat slide device of the first aspect of the present invention, since the latch in the slide lock mechanism is attached to the lower end side of the operation shaft via the single lock spring, the washer, the wave washer, Compared to a conventional latch fixing structure using three members of the E-ring, a single member called a lock spring is sufficient, and the number of parts and the number of assembly steps can be reduced.
[0014]
The seat slide device according to claim 2 of the present invention is the seat slide device according to claim 1, wherein a lower side of the operation shaft is constituted by a rivet lock, and an annular locking groove portion is formed on an outer peripheral surface near a lower end of the rivet lock. The lock spring is characterized in that a fixing portion that engages with the locking groove portion is formed in the mounting hole of the disc spring, and an elastic portion that elastically contacts the lower surface of the latch.
[0015]
According to the seat slide device of the second aspect of the present invention, the annular locking groove is formed on the outer peripheral surface of the rivet lock constituting the lower side of the operation shaft, and the rivet lock is inserted into the mounting hole of the latch. After that, if a lock spring is press-fitted from the leading end side of the rivet lock, the lock spring is locked to the rivet lock because a fixing portion that engages with the annular locking groove is formed in the mounting hole of the disc spring. Since the spring can be firmly fixed, and the elastic portion provided on the lock spring is in elastic contact with the lower surface of the latch, the latch can be stably fixed without rattling.
[0016]
Furthermore, since the protruding dimension of the rivet lock protruding downward from the lower surface of the latch can be reduced, when the upper rail is assembled and fixed in the long lower rail, the rivet lock and the mounting bracket that has been previously inserted in the lower rail are fixed. A large clearance can be secured between the rivet and the interference between the two can be prevented.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a seat slide device according to the present invention will be described in detail with reference to the drawings.
1 to 5 show embodiments of the present invention. FIG. 1 is a cross-sectional view showing the configuration of the seat slide device of the present invention. FIG. 2 is a perspective view showing a lower rail in the seat slide device. FIG. 4 is an exploded perspective view showing the configuration of the upper rail in the seat slide device, FIG. 4 is a plan view and a sectional view showing a lock spring for fixing the latch of the slide lock mechanism in the seat slide device, and FIG. It is explanatory drawing which shows an aspect.
[0018]
In FIG. 1, a seat slide device 10 according to the present invention is supported by a long lower rail 20 that is placed long in the front-rear direction of the vehicle floor surface, and is slidably guided and supported in the longitudinal direction on the long lower rail 20. The upper rail 30 is fixed to the seat body.
[0019]
The long lower rail 20 and the upper rail 30 in the seat slide device 10 are made of an extrusion-molded product made of a light alloy such as an aluminum die-cast product or a magnesium alloy. The long lower rail 20 and the upper rail 30 are made of a hard synthetic resin. The injection-molded product may be used.
[0020]
As shown in FIGS. 1 and 2, the long lower rail 20 has a main body portion 20a having a substantially U-shape upward, and extends inwardly from the front end sides of both side portions of the main body portion 20a, and has an opening 20b. A pair of left and right flanges 20c is provided, and a slider receiving portion 20d that receives a slider is formed on the inner surface of the upper corner portion of the main body portion 20a, and a roller receiving step portion 20e that receives a roller is formed on both sides of the bottom portion of the main body portion 20a. ing.
[0021]
Further, a lock hole 21 that is selectively engaged with a lock member, which will be described later, is formed on one side surface of the long lower rail 20, and the front and rear sides 2 of the long lower rail 20 are used for fixing to a vehicle floor (not shown). A vehicle body mounting bracket 22 is installed at a location, a rivet hole 20f is formed on the bottom side of the main body 20a of the long lower rail 20, and a rivet hole 22a is also formed in the vehicle body mounting bracket 22 so that a rivet 23 is formed. Is inserted into each of the rivet holes 20f and 22a and caulked to fix the long lower rail 20 and the vehicle body mounting bracket 22, and by tightening and fixing the bolt into the bolt hole 22b of the vehicle body mounting bracket 22, Lower rail 20 is attached to the vehicle floor.
[0022]
The opening 20b of the long lower rail 20 is set to be narrow so that foreign matter such as dust and dirt does not enter the long lower rail 20 from the outside, but the insertion position of the rivet 23 is taken into consideration. Thus, only this portion is set to the large diameter portion 20g that allows the insertion of the rivet 23.
[0023]
Next, the configuration of the upper rail 30 that is slidably accommodated along the long lower rail 20 will be described with reference to FIGS. 1 and 3. The upper rail 30 is substantially downwardly attached to the long lower rail 20. The main body 30a has a U-shape and a vertical wall 30b that extends upward from the upper side of the main body 30a and projects upward from the opening 20b of the long lower rail 20.
[0024]
Then, slider receiving portions 30c for accommodating the sliders 31 are formed at both end portions on the long side of the upper rail 30 so that the main body portion 30a of the upper rail 30 can slide smoothly in the main body portion 20a of the long lower rail 20. In addition, a shaft hole 30d is formed so as to pass through both side portions of the body portion 30a slightly on the center side from the slider receiving portion 30c, and a roller shaft 32 is attached in the shaft hole 30d. Rollers 33a and 33b having a left and right split configuration are pivotally supported, and spring properties are imparted to the rollers 33a and 33b by a coil spring 33c inserted between the rollers 33a and 33b. Even if there is input in the horizontal direction, it is configured to exhibit smooth sliding performance That.
[0025]
In addition, attachment holes 30e are formed in the vertical wall 30b for attachment to the seat body side at the front and rear end portions of the vertical wall 30b of the upper rail 30, and the leg bracket 34 is overlapped on the vertical wall 30b, so that the upper rail 30 After fitting the mounting hole 30e and the mounting hole 34a of the leg bracket 34, the bolt 34b is fastened and fixed to the weld nut 34c, thereby fixing the leg bracket 34 to the upper rail 30 and the stud bolt 34d for the leg. The upper rail 30 is attached and fixed to the seat side via the leg bracket 34 by being inserted into the mounting hole 34e of the bracket 34 and fastened and fixed to the seat body (not shown).
[0026]
By the way, the seat slide device 10 according to the present invention is characterized in that the slide lock mechanism 40 can be easily assembled to the upper rail 30.
[0027]
First, the outline of the slide lock mechanism 40 assembled to the upper rail 30 will be described. The operation lever 41 is attached to the shaft lock 42 via the bush 43, and the operation piece 44 having a cam function at the lower end of the shaft lock 42. A rivet lock 45 that is eccentric to the shaft lock 42 is fixed to the operation piece 44, and a latch 46 is attached to the lower end side of the rivet lock 45.
[0028]
In the present invention, the latch 46 is fixed to the rivet lock 45 by a single lock spring 50.
[0029]
The operation lever 41 is provided with a coil spring 47 so that the lock claw 46a of the latch 46 can be always biased in the direction in which the lock claw 46a of the latch 46 is engaged with the lock hole 21 of the long lower rail 20. It is fixed by a nut 48.
[0030]
Briefly describing the operation of the slide lock mechanism 40, the lock claw 46a of the latch 46 is engaged in the lock hole 21 of the long lower rail 20 by the spring force of the coil spring 47 in normal time (when locked). However, if the operation lever 41 is operated, the shaft lock 42 is rotated, and the operation piece 44b having a cam function is rotated as an arm, whereby the latch 46 is moved backward, and the lock claw 46a is moved to the long lower rail. 20 is released from the lock hole 21 and the lock is released.
[0031]
As shown in FIG. 4, the lock spring 50 is constituted by a disc spring, and fixed portions 52 are formed at four locations in the radial direction of the central mounting hole 51, and the latch 46 An elastic portion 53 for suppressing rattling is formed in a curved shape, and a pressing portion 54 is formed on the outer peripheral edge side.
[0032]
As shown in FIG. 5, the lock spring 50 can be easily attached by a one-touch operation in which the lock spring 50 is press-fitted in the direction of the arrow from the lower end side of the rivet lock 45, and provided on the outer peripheral surface of the rivet lock 45. When the fixing portion 52 of the lock spring 50 bites into the locking groove 45 a, the lock spring 50 is firmly fixed to the rivet lock 45, and the pressing portion 54 of the lock spring 50 is connected to the latch 46 via the elastic portion 53. Abutting on the lower surface, the pressing portion 54 presses the latch 46, and rattling of the latch 46 is suppressed, and a stable locking operation is possible.
[0033]
Therefore, the conventional three members of the washer, the wave washer and the E-ring are required as a fixture, but only a single lock spring 50 is required, so the number of parts and the number of mounting steps can be greatly reduced. Therefore, the assembling workability of the slide lock mechanism 40 can be greatly improved.
[0034]
As can be seen from FIG. 1, by using a thin lock spring 50, the projecting dimension of the rivet lock 45 projecting downward from the lower surface of the latch 46 can be restricted, so that the lower end of the rivet lock 45 and the long lower rail A sufficient clearance from the upper end surface of the rivet 23 for fixing 20 to the vehicle body mounting bracket 22 can be secured.
[0035]
Therefore, there is no problem that the rivet 23 and the rivet lock 45 of the seat slide mechanism 40 interfere when the long lower rail 20 and the upper rail 30 are assembled, and the long lower rail 20 and the upper rail 30 are smoothly assembled. There is an advantage that can be done.
[0036]
The present invention is not limited to the structure of the above-described embodiment, and the shape, structure, and the like of each part of the seat slide device 10 can be freely modified and changed as necessary. , 30 shapes and materials, and various modifications are conceivable.
[0037]
【The invention's effect】
The above is the embodiment of the seat slide device according to the present invention. According to the seat slide device according to claim 1 of the present invention, the latch in the slide lock mechanism has a single lock on the lower end side of the operation shaft. Since it is attached via a spring, it requires only a single member called a lock spring compared to the conventional latch fixing structure using three members: washer, wave washer, and E-ring, reducing the number of parts and assembly man-hours. In addition, the cost can be expected, the workability is improved, and the latch can be reliably prevented from dropping and rattling, and the slide lock accuracy can be maintained well over a long period of time.
[0038]
According to the seat slide device of the second aspect of the present invention, the annular locking groove is formed on the outer peripheral surface of the rivet lock constituting the lower side of the operation shaft, and the rivet lock is inserted into the mounting hole of the latch. After that, if a lock spring is press-fitted from the leading end side of the rivet lock, the lock spring is locked to the rivet lock because a fixing portion that engages with the annular locking groove is formed in the mounting hole of the disc spring. The spring can be firmly fixed, and the elastic portion provided on the lock spring is in elastic contact with the lower surface of the latch, so that the latch can be stably fixed without rattling.
[0039]
Furthermore, since the protruding dimension of the rivet lock protruding downward from the lower surface of the latch can be reduced, when the upper rail is assembled and fixed in the long lower rail, the rivet lock and the mounting bracket that has been previously inserted in the lower rail are fixed. It is possible to ensure a large clearance with the rivet, prevent interference between the two, and improve the workability in assembling the long lower rail and the upper rail.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a configuration of a seat slide device according to the present invention.
FIG. 2 is a perspective view showing a long lower rail in the seat slide device shown in FIG.
3 is an exploded perspective view showing a configuration of an upper rail in the seat slide device shown in FIG. 1. FIG.
4A and 4B show a lock spring used for a slide lock mechanism in the upper rail shown in FIG. 3, wherein FIG. 4A is a plan view, and FIG. 4B is a cross-sectional view taken along line BB in FIG.
5 is an explanatory view showing an assembled state of a lock spring in a slide lock mechanism in the upper rail shown in FIG. 3. FIG.
FIG. 6 is a cross-sectional view showing a configuration of a conventional seat slide device.
FIG. 7 is an exploded perspective view showing a long lower rail and an upper rail in a conventional seat slide device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Seat slide apparatus 20 Long lower rail 20a Main part 21 Lock hole 22 Car body mounting bracket 23 Rivet 30 Upper rail 30a Main part 30b Vertical wall 31 Slider 40 Slide lock mechanism 41 Operation lever 42 Shaft lock 44 Operation piece 45 Rivet lock 45a Locking Groove portion 46 Latch 46a Lock claw 46b Mounting hole 50 Lock spring 51 Mounting hole 52 Fixing portion 53 Elastic portion 54 Pressing portion

Claims (2)

In a seat slide device comprising a long lower rail provided along the front-rear direction of the vehicle floor, and an upper rail that is supported and slidable in the longitudinal direction on the long lower rail, and is mounted and fixed on the seat body side,
The long lower rail includes a main body portion that has a substantially U-shape upward, and a pair of left and right flanges that extend inward from both ends of the main body portion to form an opening, and the upper rail includes: A main body portion having a substantially U-shaped downward shape that can be assembled to the long lower rail, and a vertical wall that protrudes upward from the center of the upper wall of the main body portion and protrudes upward from the opening of the long lower rail, A lock member having a plurality of lock holes formed in a side portion of the main body portion of the long lower rail and having lock claws selectively engaged with the plurality of lock holes of the long lower rail from the side portion of the upper rail is provided. The lock member includes a latch having a lock claw fixed to a lower end side of an operation shaft operated by an operation lever via a single lock spring. Ride apparatus. The lower side of the operation shaft is constituted by a rivet lock, and an annular locking groove is formed on the outer peripheral surface near the lower end of the rivet lock. 2. The seat slide device according to claim 1, further comprising an elastic portion that is formed and elastically contacts the lower surface of the latch.

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