JPS6144037A - Lock mechanism in seat slide rail - Google Patents

Abstract

PURPOSE:To simplify the structure of a lock mechanism in a seat slide rail in which an engaging member provided to either one of lower and upper rails of a slide rail is engaged with an engaged member provided to the other one of them, by forming the engaging member with a single resilient member. CONSTITUTION:A seat slide rail 1 in the front seat section of an automobile is composed of a lower rail 2 secured to a vehicle body floor, and an upper rail 5 slidably fitted onto the rail 2 through the intermediary of rotatable rollers 3 and steel balls 4. In this arrangement, a lock mechanism R2 in the slide rail 1 comprises a lock plate 8 as an engaged member formed at its front end with concave and convex engaging projections 12 and attached to the lower surface of the lower rail 2, and an L-like ratch 15 as an engaging member made of a leaf spring and attached to the upper rail 5. Further, the ratch 15 is formed, in the lower section of its side wall 16, engaging holes 17 adapted to be engaged with the projections 12, and a connecting part 18 for a releasing control wire 13.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an improvement in a locking mechanism for a seat slide rail.

In general, the front seat of a car can be slid forward and backward by a pair of seat slide rails located on both sides of the lower part of the seat. It restricts movement and allows the driver to change to a comfortable driving position.

[Conventional technology]

Conventional seat slide rail locking mechanisms R1 include those shown in FIG. 12 and WJ13, for example. In this case, a slide rail l is fixed to a lower rail 2 fixed to the vehicle body floor (not shown) and the lower surface of a seat cushion/(not shown), and 2 and an upper rail 5 that is slidably fitted into the upper rail 5.
A latch 7 is attached to the upper rail 5 via a bracket 6, and a port is attached to the lower rail 2.

It consists of a plate 8. The launch 7 is attached to the bracket 6 via a shaft 8, and is rotatable around the shaft 8, and a coil spring 1 is disposed between it and the shaft 8.
0, the latch 7 is always biased toward the slide rail 1 side, and the engagement hole 11 formed at the lower end of the latch 7 engages with a part of the engagement protrusion 12 provided in an uneven shape at the tip of the lock plate 8, thereby locking the upper rail. It has a structure that restricts the movement of 5.

When the upper rail 5 is to be slid, for example, one end of the shaft 8 is extended to the tip of the seat cushion, and the extended portion of the shaft 8 is rotated to directly engage the latch 7.
When the slide rail is rotated in the detachment direction and removed from the retaining protrusion 12, or when locking mechanisms are provided on both the left and right slide rails and an operating lever (not shown) provided on the other locking mechanism is operated. In the type in which the locking mechanism R1 operates according to this, one end of the wire 13 extending from the operating lever is connected to the connecting piece 14 formed integrally with the latch 7, and when the operating lever is operated,
By pulling the wire 13 in the direction in which the latch 7 is removed, the latch 7 can be rotated and removed from the engagement protrusion 12 (see Japanese Utility Model Application Publication No. 59-89732 for a similar structure).

[Problem that the invention seeks to solve]

However, the conventional locking mechanism described above requires a bracket 6 and a shaft 8 to attach the latch 7, and also requires a coil spring 10 to bias the latch 7. becomes a lot. As a result, there are problems in that the structure becomes complicated, requiring more man-hours for assembly, the weight of the entire seat slide increases, and the cost also increases.

[Means for solving problems]

The present invention solves the above-mentioned conventional problems by providing a lowering mechanism with fewer component parts. The upper rail is slidably fitted into the seat slide rail, and the movement of the upper rail is restrained by engaging the engaging body provided on one side of the rail with the engaged body provided on the other side. In the locking mechanism for the seat slide rail, the locking mechanism for the seat slide rail includes the engaging body made of a single elastic member.

[Effect]

The seat slide rail locking mechanism utilizes the elastic action of the engaging body itself to easily engage and disengage from the engaged body.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail based on the accompanying drawings.

In the embodiment of the present invention shown in FIGS. 1 and 2, the slide rail l has a lower rail 2 fixed to the vehicle body floor, and can slide on this lower rail 2 via rotating rollers 3 and steel balls 4, as in the conventional case. The locking mechanism R2 of the slide rail 1 includes a lock plate 8 of the same shape as the conventional lock plate 8 as an engaged body attached to the lower surface of the lower rail 2, and an upper rail 5 fitted to the upper rail 5. A latch 15 in the shape of a leaf spring serves as an engaging body.

The latch 15 is formed by bending a plate spring into a single shape, and has an engagement hole 17 at the lower end of the side wall surface 16 that engages with an engagement protrusion 12 provided at the tip of the lock plate 8, and a connection between the wire 13 and the engagement hole 17. The rear end portion of the upper wall surface 19 is fixed to the upper surface of the upper rail 5 with rivets 20.

Therefore, according to the above embodiment, in the normal state, since the engagement protrusion 12 of the lock plate 8 fits into the engagement hole 17 of the latch 15, the movement of the upper rail 5 is restricted, and the longitudinal position of the upper rail 5 is restricted. When changing, wire 1
By pulling 3, the latch 15 is elastically deformed in the detachment direction, the side wall surface 16 expands outward, and the engagement with the engagement protrusion 12 is disengaged. Then, after sliding the upper rail 5 to a predetermined position, when the wire 13 is loosened, the elastic restoring force of the latch 15 returns to the original state, and the retaining protrusion 12 fits into the engagement hole 17 of the latch 15 again, and the upper rail 5's movement is restricted.

As described above, in the above embodiment, since the punch 15 is composed of only a single elastic engagement body, the structure is extremely simple and easy to assemble, and the weight and cost are reduced. can be achieved.

In addition, when the locking mechanism R2 according to the above embodiment is attached to only one side of the pair of slide rails 1 disposed on the lower surface of the seat, the locking mechanism R2 can be directly connected to the operating lever by an appropriate connection means. The latch 15 can be engaged and disengaged. Further, as shown in FIG. 3, in the type in which the locking mechanism 83 is also provided on the other slide rail 1a, the locking mechanism R2 of the above embodiment is used as a secondary lock, and the main locking structure R3 having a sturdy and highly rigid structure is used. The base end 22 of the operating lever 21 and the slave lock mechanism R2
By stretching the wire 13 between the connecting portion 18 of the latch 15 of 15 can be elastically deformed to release the engagement with the engagement protrusion 12. still,
In FIG. 3, reference numeral 24 denotes the central axis of rotation of the operating lever 21;
5 is a bracket.

In this type of type in which locking mechanisms are provided on both slide rails, the main locking mechanism R3 is made of a sturdy material to ensure that the movement of the slide rail 1a is restrained, and the secondary locking mechanism R2 has only the function of preventing rattling. Since the stability of the seat can be sufficiently ensured by locking the seat, when the above embodiment is used, the secondary locking mechanism R1 having a highly rigid structure like the main locking mechanism 83 is used as in the conventional case. It is an effective means of comparison.

4 to 6 show a locking mechanism R4 according to a second embodiment of the present invention, and as shown in FIG. The latch 15 is reinforced with a rigid body 28 in order to prevent the latch 15 from being deformed and the latch 15 and the lock plate 8 coming out of engagement. As shown in FIG. 4, this rigid body 28 is made by bending a highly rigid plate material into an L-shape, and forming vertical walls 28 on both sides of the earthen wall section 27.
A flange 29 is provided by bending the front end of the vertical wall 28 inward, and a claw portion 31 for cutting and raising is provided on the front side wall portion 30. Incidentally, a fitting hole 3 is also provided on the side wall surface 16 of the launch 15 at a position corresponding to the claw portion 31.
2 will be established.

Therefore, as shown in FIGS. 5 and 6, the latch 15 is fitted from the front of the rigid body 26 and the flange 29
5, and hold both sides of the front end of the upper wall surface 19 of the latch 1.
The claw portion 31 is fitted into the fitting hole 32 of No. 5, and in this state both are fixed to the No. 7 stud rail 5 with the rivet 20. In such an embodiment, even if an excessive amount of human force is applied to the upper rail 5 in the longitudinal direction, the upper wall surface 18 of the arm punch 15 is held down by the flange 28 of the rigid body 26 on both sides of the front end. In addition to reliably preventing the front end portion from curling up, the engagement means between the claw portion 31 and the peripheral edge portion of the fitting hole 32 provides.

Movement of the side wall surface 1θ of the latch 15 in the front-rear direction and downward direction is restrained, and the latch 15 is prevented from being deformed and disengaged from the lock plate 8. Further, since the rigid body 26 itself has a structure that is difficult to deform due to the vertical walls 28 formed on both sides of the earthen wall portion 27, it becomes effective as a reinforcing material for the latch 15. The latch 15 and the lock plate 8 are engaged and disengaged by the same means as in the above embodiment. Note that the rigid body is not limited to the above shape, and may be, for example, a flat rigid plate simply pressed down from the upper surface of the latch 15.

FIG. 8 shows a lowering mechanism R5 according to a third embodiment of the present invention, in which a latch 33 made of a plate spring material is provided on the side surface of the upper rail 5. The latch 33 according to this embodiment has a fixing part 34 welded to the side surface of the upper rail 5 formed on the front side, and the rear end side of the latch 33 is elastically deformed in the left-right direction to close the engagement hole 3.
5 and the lock plate 8 can be engaged and disengaged. Therefore, in this embodiment as well, the locking mechanism R5 can be operated by tying the wire 13 to the connecting portion 36 at the lower end of the latch 33 and operating the wire 13.

Note that the position of the fixing portion 34 may be on the rear side of the latch 33.

FIG. 9 shows a fourth embodiment of the locking mechanism R6 according to the present invention, in which the latch 3 is connected by a wire having spring properties.
7 was formed. In this embodiment, both ends 3 of the latch 37 are bent into a substantially U-shape. a, 37b are welded to the upper surface of the upper rail 5, and a pair of engaging portions 38a, 38b are welded to the upper surface of the upper rail 5.
is engaged with the engagement recess 12a of the lock plate 8 to restrain the movement of the upper rail 5, and is disengaged from the lock plate 8 by pulling in the detachment direction with a wire 13 or the like, and the upper rail 5 is moved in the front-rear direction. After letting
When the wire 13 is loosened, the latch 37 engages with the lock plate 8 due to its elastic return action and the movement of the seven-piece rail 5 is restrained.

FIG. 10 and FIG. 11 show the locking mechanism R7 according to the present invention.
This shows a fifth embodiment of the present invention, in which the latch 3S is formed of a wire material having spring properties, similar to the embodiment 1-1, but in this embodiment, the latch 39 is formed into a substantially U-shape.
The fixing part 40 at one end is welded to the flat surface of the rail 5, and the engaging part 41 at the other end is connected to the lower rail 2 and upper rail 5.
The movement of the seven-piece rail 5 is restrained by inserting it into engagement holes 42 and 43 formed in each side wall of the rail. Note that a plurality of retaining holes 42 in the lower rail 2 are provided. By pulling the latch 39 to the side with the wire 13 or the like and pulling out the tip of the engaging part 41 from the negative engaging hole 42 of the lower rail 2, a) the pararail 5 can be freely moved, and the latch 39 is held in a predetermined position. Due to the elastic return action, the tip of the latch 38 fits into the other engagement hole 42 of the lower rail 2, and the movement of the upper rail 5 is restricted.

In addition, the row 2 mechanism according to the second embodiment to the fifth embodiment is as follows:
Similar to the first embodiment, the present invention can be applied to both the case where the locking mechanism is provided only on one side of the slide rail and the case where the locking mechanism is provided on both slide rails. Further, even when locking mechanisms are provided on both slide rails, the present invention may be applied to both locking mechanisms, or may be applied in combination with a conventional locking mechanism.

〔effect〕

As explained above, the seat slide rail locking mechanism according to the present invention requires fewer components than conventional ones, so the structure of the locking mechanism itself is simpler and assembly is easier. At the same time, weight reduction can be achieved, and further cost reduction can be achieved.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing the locking mechanism of the seat slide rail according to the first embodiment of the present invention, and FIG. 2 is II in FIG.
- I'1 line sectional view, Figure 3 is a perspective view when the locking mechanism described in 1-- is actually applied, Figure 4 is a perspective view of a rigid body, and Figure 5 is a perspective view of the rigid body.
The figure is a perspective view showing a second embodiment of the present invention reinforced with a rigid body.
6 is a sectional view taken along the line Vl-Vl in FIG. 5, wlJ7 is a perspective view showing a deformation of the latch, FIG. FIG. 4 is a perspective view showing a fourth embodiment of the locking mechanism according to the present invention. Fig. 10 is a perspective view of a locking mechanism showing a fifth embodiment of the present invention, Fig. 11 is a sectional view taken along the middle sword line of Fig. 10, and Fig. 12 shows an example of a conventional locking mechanism for a seat slide rail. The perspective view and FIG. 13 are cross-sectional views taken along the line XI-XI in FIG. 12. 1...Slide rail 2...Lower rail 5...Upper rail 8...Lock plate (engaged body) 15.23,3
3, 37, 3θ...Latch (engaging body) Patent applicant
Nissan Motor Co., Ltd. No. 1! ! I Figure 2 Figure 8 Figure 10 Go to Figure 11

Claims (2)

[Claims] (1) A seat slide rail is composed of a lower rail fixed to the vehicle body floor and an upper rail fixed to the lower part of the seat and slidably fitted into the lower rail, and an engaging body provided on either side of the above rail. A locking mechanism for a seat slide rail that restricts movement of the upper rail by engaging with an engaged body provided on the other side, wherein the engaging body is composed of a single elastic member. Slide rail locking mechanism. (2) The seat slide rail locking mechanism according to claim 1, wherein the engaging body is a leaf spring fixed to the upper rail.