JP3170183B2 - Seat lock device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seat lock device which slidably engages with a lower rail fixed to a floor side and inhibits movement of an upper rail on which a seat is provided.

[0002]

2. Description of the Related Art Next, a conventional example will be described with reference to the drawings.
FIG. 8 is a front view of a seat slide device provided with a conventional seat lock device, and FIG. 9 is a sectional view taken along AA in FIG.

In these figures, 1 is a lower rail fixed to the floor side, and 2 is an upper rail slidably engaged with the lower rail 1 and provided with a seat. A plurality of lock holes 1 a are formed on the bottom surface of the lower rail 1, and a lock device 3 that engages with the lock holes 1 a and prohibits the movement of the upper rail 2 is provided on the upper rail 2.

In the lock device 3, reference numeral 4 denotes a lock hole 1a.
This is a lock plate guide that guides the lock plate 5 having the lock teeth 5a that can be engaged with the lock plate 5 so as to be movable in a direction substantially orthogonal to the surface provided with the lock holes 1a.

The lower portion of the lock plate guide 4 is bent, and a bent portion is formed with a hole 4a through which the lock plate 5 is inserted. A lock plate 5 slides on the lower end of the lock plate guide 4, and a slide piece 6 for preventing the play of the lock plate 5 and the generation of abnormal noise.
Is provided.

The lock plate 7 has one end locked to the lock plate 5, the other end locked to the upper rail 2, and a lock plate 5 in a direction in which the lock teeth 5 a of the lock plate 5 engage with the lock holes 1 a of the lower rail 1. 5 is a spring that urges 5.

Next, the operation of the above configuration will be described. Normally, the lock teeth 5a of the lock plate 5 are engaged with the lock holes 1a of the lower rail 1 by the urging force of the spring 7,
The movement of the upper rail 2 is prohibited.

Here, against the urging force of the spring 7,
When the lock plate 5 is pulled upward, the engagement between the lock teeth 5a of the lock plate 5 and the lock hole 1a of the lower rail 1 is released, and the upper rail 2 is movable with respect to the lower rail 1.

When the upper rail 2 is moved to a desired position and the force for lifting the lock plate 5 upward is released, the lock plate 5 is urged downward by the urging force of the spring 7, and the lock teeth of the lock plate 5 are locked. 5
a engages with the lock hole 1a of the lower rail 1 again, and the movement of the upper rail 2 is prohibited.

[0010]

However, the lock device having the above-described structure has the following problems. (1) The lock plate 5 has one lock tooth 5a, and the impact force concentrates on this one tooth 5a during a vehicle collision.
Considering safety, the strength of the lock teeth 5a and the lock holes 1a must be increased. Therefore, it causes a cost increase such as a thicker member.

(2) The cost of the resin slide piece 6 provided on the lock plate guide 4 for preventing abnormal noise and play of the lock plate 5 increases. The present invention has been made in view of the above problems, and an object of the present invention is to provide a low-cost seat lock device.

Another object of the present invention is to provide a seat lock device free from abnormal noise and play.

[0013]

Means for Solving the Problems A first method for solving the above problems is described below.
The seat lock device according to the present invention is a seat lock device that slidably engages with a lower rail fixed to a floor side and prohibits movement of an upper rail on which a seat is provided.
Either one rail of the lower rail and the upper rail, a plurality of lock holes bored along the moving direction of the rail, provided on the other rail, the lock hole engageable with b Kkuha With a lock plate and a front
On the other rail to cover the lock plate.
And the lock plate is provided on a surface provided with the lock hole.
To be movable in a direction substantially perpendicular to the
Hole where the lock teeth of the lock plate are inserted and removed
And a lock plate guide formed with
Around the lock plate guide hole,
Generation of backlash and abnormal noise with the hole of the lock plate guide
Is provided with a resin coating layer to prevent the occurrence of the

[0014]

[0015]

[0016]

[0017]

[0018]

By providing the resin coating layer,
The play between the lock plate and the hole of the lock plate guide and the generation of abnormal noise can be prevented. Further, since the resin coating is used, the cost can be reduced.

Here, when the lock plate guide is manufactured by press working, the guide width around the hole of the lock plate guide is set to prevent abnormal noise between the inner wall surface of the hole of the lock plate guide and the lock plate. It is desirable to set the guide width to be larger than the guide width of other parts.

[0021]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of the present invention; FIG. First, the overall configuration of the seat slide device according to the present embodiment will be described with reference to FIGS. FIG. 2 is a front view of a seat slide device provided with a seat lock device according to an embodiment of the present invention, and FIG. 3 is a top view in FIG. In the figure, 3
1 is a lower rail fixed on the floor, 32 is an upper rail slidably engaged with the lower rail 31 and provided with a seat.

Next, the sectional shape of the lower rail 31 will be described with reference to FIG. FIG. 6 is a sectional view taken along section line BB in FIG. The cross section of the lower rail 31 includes a bottom surface 34 substantially parallel to the floor, a first side surface 35 bent from both sides of the bottom surface 34 and extending in a direction substantially perpendicular to the floor, and a second side surface 35.
Side surface 36 and a first upper surface 37 bent from the upper ends of the first and second side surfaces 35 and 36 in a direction approaching each other.
And the second upper surface 38 and the first and second upper surfaces 3
A first folding surface 39 and a second folding surface 40 which are folded into the lower rail 31 from the distal ends of 7, 38 are formed. A slit-shaped hole 31 a that connects the inside and the outside of the lower rail 31 is formed between the first folding surface 39 and the second folding surface 40.

Further, a plurality of lock holes 34a are formed in the bottom surface 34 of the lower rail 31 at a predetermined pitch. Next, the upper rail 32 will be described with reference to FIGS. 4 is an enlarged view of the upper rail in FIG. 2, and FIG. 5 is a top view in FIG.

The main body of the upper rail 32 is composed of a plate-shaped first upper rail 50 and a second upper rail 51 laminated on the first upper rail 50. these,
First upper rail 50 and second upper rail 51
Has a first base 52 substantially perpendicular to the floor;
Of the second upper rail 51 laminated on the base 52
And a base 53.

The first and second upper rails 5
The first base 52 and the second base 53 of the lower rail 51 are connected to the lower rail 3 through holes 31 a formed in the lower rail 31.
1, a first bottom surface 55 and a second bottom surface 56 that are parallel to the bottom surface 34 of the lower rail 31, and are bent away from the first and second bottom surfaces 55 and 56 from the bottom surface 34. First side surface 35 and second side surface 3
A first rising surface 57 and a second rising surface 58 extending in parallel with 6 are formed.

Each rising surface 57, 58 of the upper rail 32
Is provided with a resinous slider 60 which can slide on the inner wall surface of the lower rail 31. In this embodiment, a lock device attached to the first upper rail 50 is provided at the center of the upper rail 32 as shown in FIG.
There is a (details will be described later) 74, and the second upper rail 51 is not provided in a portion where the lock device 74 is provided.
A weld nut 65 for attaching a seat is fixed to the front and rear portions of the upper rail 32.

At the front and rear of the upper rail 32, there are provided brackets 71 for rotatably supporting a rotating shaft 73 of a roller 70 that rolls on the bottom surface 34 of the lower rail 31.

With the slider 60 and the roller 70 described above,
The upper rail 32 is positioned with respect to the lower rail 31 in the up-down direction and the side direction.
Becomes movable with respect to the lower rail 31.

Next, the lock device 74 will be described with reference to FIGS.
This is performed using FIG. 5 and FIG. As shown in FIG. 4, an intermediate portion of the upper rail 32, that is, a portion where the second upper rail 51 is not provided, is provided on the first upper rail 50 so as to cover the lock plate 75, and guides the lock plate 75 in the vertical direction. A first lock plate guide 76 is provided.

As shown in FIG. 6, a second lock plate guide 77 is provided at the upper portion of the first upper rail 50 so that the upper portion of the lock plate 75 is engaged with the upper rail 50 to guide the lock plate 75 in the vertical direction. Have been.

Then, below the lock plate 75,
Lock hole 34a drilled in bottom surface 34 of lower rail 31
(Two in this embodiment), ie, a first lock tooth 75a and a second lock tooth 75b
Are formed.

On the other hand, as shown in FIG. 5, two brackets 81 for rotatably supporting the lock shaft 80 are provided on the side of the upper rail 32. An intermediate portion of the lock shaft 80 is provided with a pin 82 that is loosely fitted in a vertically extending elongated hole 75 e formed on an upper portion of the lock plate 75.

A spring 83 provided at one end of the lock shaft 80 has one end locked to the bracket 81, an intermediate portion wound around the lock shaft 80, and the other end formed on the end surface of the lock shaft 80. Locking teeth 75a, 75b of the lock plate 75
Apply a biasing force to the lock shaft 80 in a direction in which the lock shaft 34 meshes with the lock hole 34 a of the lower rail 31. An operation lever 85 is fixed to the other end of the lock shaft 80.

Here, the lock plate 75 will be described with reference to FIG.
Will be described in detail. The first lock teeth 75a of the lock plate 75 are provided with a first contact surface 75c that abuts the lock hole 34a and prohibits the upper rail 32 from moving in one direction.

Similarly, the second lock tooth 75b is provided with a second contact surface 75d which abuts on the lock hole 34a and inhibits the movement of the upper rail 32 in the other direction. The other surfaces of the lock teeth 75a and 75b are configured to face the inner wall surface of the lock hole 34a at intervals.

Further, the surfaces of the lock teeth 75a, 75b are
The slope is such that the width of the teeth becomes wider toward the base of the teeth. Next, the first lock plate guide 76 will be described in detail with reference to FIG. 7A is a rear view of the first lock plate guide shown in FIG. 4, and FIG.
The figure shows a bottom view of FIG. 7A, and FIG. 7C shows a right side view of FIG.

In the vicinity of the lock hole 34a at the lower portion of the first lock plate guide 76, a hole 76a through which lock teeth 75a and 75b of the lock plate 75 are inserted and removed is formed. Note that the first lock plate guide 76 of the present embodiment is manufactured by press working.

A resin coating (a nylon coating in the present embodiment) is applied to the periphery of the hole 76a (portion surrounded by a two-dot chain line in the drawing (a)).
The guide width W around the hole 76a of the first lock plate guide 76 is set to be larger than the width W 'of the other portions.

Next, the operation of the above configuration will be described. Due to the urging force of the spring 83 of the lock device 74 provided on the upper rail 32 side, the lock teeth 75a and 75b of the lock plate 75 mesh with the lock holes 34a on the bottom surface 34 of the lower rail 31, and the movement of the upper rail 32 is inhibited. I have.

Here, when the lock shaft 80 is rotated by using the operation lever 85 against the urging force of the spring 83, the pin 82 of the lock shaft 80 presses the inner wall surface above the long hole 75e of the lock plate 75. Then, the lock plate 75 is moved upward. When the lock plate 75 moves upward, the lock teeth 75 of the lock plate 75 are moved.
The engagement between the lock rails a and 75b and the lock hole 34a is released, and the upper rail 32 is movable with respect to the lower rail 31.

When the upper rail 32 is moved to a desired position, the operation force of the operation lever 85 is released. Then, the lock teeth 75a and 75b of the lock plate 75 mesh with the lock holes 34a of the lower rail 31 again by the urging force of the spring 83, and the movement of the upper rail 32 is prohibited.

According to the above configuration, the lock plate 75 has a plurality of lock teeth, that is, the first lock teeth 75a and the second lock teeth 75b. Therefore, the impact transmitted from the upper rail 32 to the lower rail 31 at the time of a vehicle collision or the like is dispersed and acts on the lock hole 34a due to the plurality of lock teeth. Therefore, the strength of members such as the lower rail 31 and the lock plate 75 can be reduced as compared with the case where the number of lock teeth is one, and cost can be reduced.

Further, a first contact surface 75c of the lock tooth for inhibiting the movement of the upper rail 32 in one direction to the lock hole 34a is provided on the first lock tooth 75a, and the movement of the upper rail 32 in the other direction is inhibited. The second contact surface 75d of the locking tooth to the locking hole 34a is
5b, the other surface of the lock tooth faces the inner wall surface of the lock hole 34a with an interval, so that play at the time of locking can be eliminated.

The first and second contact surfaces 75c, 7
5d is a sloped surface of the locking teeth, the width of which increases toward the base of the locking teeth.
The contact between c, 75d and the lock hole 34a can be reliably performed.

Further, the hole 76 of the lock plate guide 76
By providing the nylon coating layer around the periphery of “a”, it is possible to prevent rattle and abnormal noise between the lock plate 75 and the hole 76 a of the lock plate guide 76. In addition, the cost can be reduced because of the nylon coating.

Here, the hole 7 of the lock plate guide 76
When the lock width guide 76 is manufactured by press working by setting the guide width W around the periphery 6a to be larger than the guide width W ′ of the other portions, the lock width guide 76 is formed.
The flatness of the inner wall surface of the hole 76a is secured.
No abnormal noise is generated with the lock plate 75 inserted and removed through the connector.

The present invention is not limited to the above embodiment. In the above embodiment, the lock device is provided on the upper rail 32 side, and the lock hole is provided on the lower rail 31 side. Conversely, the lock device may be provided on the lower rail 31 side, and the lock hole may be provided on the upper rail 32 side. .

Further, in the above embodiment, two lock teeth, that is, the first and second lock teeth 75a and 75b are formed on the lock plate 75, but the present invention is not limited to this, and three or more lock teeth are formed. Lock teeth may be formed.

[0049]

As described above,,BookInvention seat lock
According to the deviceBy providing a resin coating layer
Between the lock plate and the hole of the lock plate guide.
The generation of noise and abnormal noise can be prevented. Also, resin
Coating keeps costs low
You.

[0050]

[0051]

[0052]

Here, when the lock plate guide is manufactured by press working, the guide width around the hole of the lock plate guide is set to be larger than the guide width of the other portions, so that the flatness of the hole can be secured. Abnormal noise between the inner wall surface of the hole of the lock plate guide and the lock plate can be prevented.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a main part of an embodiment of the present invention.

FIG. 2 is a front view of a seat slide device provided with a seat lock device according to an embodiment of the present invention.

FIG. 3 is a top view in FIG. 2;

FIG. 4 is an enlarged view of an upper rail in FIG. 2;

FIG. 5 is a top view of FIG.

FIG. 6 is a sectional view taken along a cutting line BB in FIG. 4;

7A is a rear view of the first lock plate guide shown in FIG. 4, FIG. 7B is a bottom view of FIG. 7A, and FIG. 7C is a right side view of FIG. is there.

FIG. 8 is a front view of a seat slide device provided with a conventional seat lock device.

FIG. 9 is a sectional view taken along line AA in FIG. 8;

[Explanation of symbols]

 31 lower rail 31a lock hole 32 upper rail 75 lock plate 75a first lock tooth 75b second lock tooth 75c first contact surface 75d second contact surface

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A 62-198138 (JP, U) JP-A 4-26131 (JP, U) (58) Fields surveyed (Int. Cl. ⁷ , DB name) B60N 2/08

Claims (2)

(57) [Claims] 1. A seat lock device slidably engaged with a lower rail fixed to a floor side and prohibiting movement of an upper rail on which a seat is provided. a plurality of lock holes bored along the moving direction of the rail, provided on the other rail, the lock plate having a locking hole engageable with b <br/> click teeth, the lock plate On the other rail to cover
And the lock plate is provided on a surface provided with the lock hole.
To be movable in a direction substantially perpendicular to the
Hole where the lock teeth of the lock plate are inserted and removed
And a lock plate guide having a lock plate formed around the hole of the lock plate guide.
Backlash and difference between the rate and the hole of the lock plate guide.
A seat lock device provided with a resin coating layer for preventing generation of noise . 2. The lock plate guide according to claim 1, further comprising:
The seat lock device according to claim 1, wherein the guide width is set to be larger than guide widths of other portions .