JPS59100026A - Locking device for seat adjuster - Google Patents

Abstract

PURPOSE:To accelerate the motion of a lock member in the locking direction by providing an opening in said lock member, which is formed in a shape of fork and provided with two projections, and inserting a spring in said opening. CONSTITUTION:A lock member 9 having two projections 9a that agree with the pitch of the lock holes 2b of a lower rail 2' is provided. An opening 9c is provided in the lock member 9 and a spring 6 is held by projections 9d, 9e privided on the both ends of the opening 9c. The lock member 9 is guided and slidably supported by a lock guide 5.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a seat adjuster configured to support an automobile seat, freely guide it in the front and rear directions, and fix it in a desired position, and particularly relates to a seat adjuster configured to support an automobile seat, freely guide it in the longitudinal direction, and fix it in a desired position. This invention relates to a seat adjuster that has been improved so that the pitch at certain positions can be shortened.

This type of seat adjuster generally has a pair of lower rails that are fixed to the floor of a single room with locking holes arranged in a row, and a pair of upper rails that are slidably guided by the pair of lower rails. A first lock member is provided on one side of the pair of upper rails in which the above-mentioned locking holes are arranged in a row, and a first locking member that can be engaged with and detached from the locking hole is provided, and the seat is supported by the above-mentioned upper rails. Provide the same <ftg2 locking member on the other side,
The first locking member is connected to the manual operation lever, the seatback, or both for engagement and disengagement, and the second
A structure is used in which the locking member is interlocked with the locking member to engage and disengage.

With the above structure, by moving the manual operation lever or folding down the seat back, the first Remove the second locking member from the locking hole of the lower rail, move the seat back and forth as desired, return the operating lever or seat back, and move the first and second locking members through the locking hole of the lower rail. The seat can be fixed in the desired position by engaging with the seat.

And the above 1. When a separate force cannot be applied to the second locking members, coil springs are fitted onto these locking members so that they are reliably held in the position engaged with the locking hole in the engagement operation direction. It's a boost. In particular, since the second locking member is operated via a transmission member, when a wire is used as the transmission member,
Since this wire transmits a force in the direction of pulling out the locking member, but not a force in the direction of pushing the locking member, a configuration that biases the locking member in the locking direction is essential.

FIG. 1 is a plan view of the vicinity of the second locking member 1 of the conventional seat adjuster described above, FIG. 2 is a side view of the same, and FIG. 3 is an A-AFIfr plane view of FIG. 1.

2 is a lower rail in which locking holes 2a are arranged in a row. 3
is an upper rail that is slidably guided along the lower rail 2 via rollers 4 and balls 4'.

A second lock member 1 is slidably supported by a lock guide 5 fixed to the upper rail 3 described above. Reference numeral 6 denotes a coil spring fitted around the second locking member 1 in order to urge the tip of the second locking member 1 in the direction of entering into the locking hole 2a. The coil spring 6 described above is interposed between a spring receiver 7 fixed to the second lock member 1 and a bracket portion 5a formed on the lock guide 5. A spring 8 biases the upper rail 3 toward the front of the seat.

As can be easily understood from the structure explained above, conventional seat adjusters (Figs. 1 to 3) cannot steplessly fix the seat position to any desired position;
Since the structure is such that the lock member is engaged with the tilted lock holes 2a arranged in a row in the lower rail 2, the lock holes 2a are arranged in a row in the lower rail 2.
It has a function of fixing the seat position in stages according to the pitch size of the cast member a.

Conventionally, the pitch of the lock holes 2a is generally about 20 ynts.
Therefore, the slide pitch of the sheet was about 20 homo, but recently this has been shortened to about 10 homo.
That is, there is a growing demand for an improvement that allows fine adjustment at a pitch that is approximately 1/2 of the conventional pitch.

However, if the pitch of the locking holes 2a is made finer in the seat adjuster of the conventional structure, the length L (Fig. 2) of the locking holes 2a in the front-rear direction will inevitably become shorter. Width W of the retaining part of the locking member 1 (Fig. 1)
becomes narrower. If the width W of the retaining portion of the second lock member 1 becomes narrower, the required strength will not be obtained, so there is a risk that the second lock member l will be deformed and damaged when the four automobiles receive a large impact. . Furthermore, if the number of teeth in the retaining portion is increased in order to increase the load-bearing strength of the second locking member 1, the shape of the second locking member 1 will become wider.
The coil spring 6 fitted onto the outside has a large diameter and requires a large installation space, making it difficult to install it in a narrow space.

In this way, the following three aspects of the second lock 6b material are interrelated: (a) adjustable slide pitch, (b) load-bearing strength, and (c) size of shape. If we try to improve one of these points, we must at least consider the other two points and take care not to affect them.

The present invention has been made in view of the above-mentioned circumstances, and can shorten the slide pitch to about 1/2 compared to conventional seat adjusters, without reducing strength, and
It is an object of the present invention to provide a locking device for a seat adjuster that can reduce the size and cost of the device.

In order to achieve the above object, the seat adjuster of the present invention has locking holes arranged in rows and fixed to the floor of a single room.
a pair of lower rails; a pair of upper 1 knolls that are slidably guided by the pair of lower rails and carry a seat rail; T1. is slidably supported on the other one of the pair of tube rails and is driven by the first locking member via an interlocking member. a second locking member that engages and disengages from the locking hole of the lower rail;
・Ranaru car seat adjuster lock 6ff
i °C1 The second locking member is formed into a plate shape having two parallel sides, and one end t in the direction of the two sides is formed into a forked shape, and the second locking member is connected to and disengaged from the two lock holes at the same time. The locking member is configured to have a slot-like opening in the direction of two parallel sides, and a protrusion for inside the spring strip in the direction of the two parallel sides is formed at each end of the slot. , both ends of the coil spring are attached to these two protrusions.
7AW and the locking member is biased in the two parallel sides direction is indicated as %.

Next, an example of the present invention will be described with reference to FIGS. 4 and 5. FIG. 4 is a plan view of the second locking member A.
5-td Figure 4 1') - Required in the sectional view.

The lower rail 2' of this embodiment is a member similar to the lower rail 2 of the conventional device, but the pitch dimension is about 1/1 of that of the conventional device.
There is one locking hole 2b which is shortened to '2' and arranged in a row. In FIG. 4, the lower rail 2' is illustrated by a cross section along the center leg of the row of locking holes 2b, and other outlines are omitted.

Reference numeral 9 denotes a second locking member constructed according to the present invention. This second locking member 9 has two parallel sides G and H at 41
It is formed into a slightly elongated plate shape, and is supported so as to be slidable in the direction of arrow B-B' while being guided by the above-mentioned two-parallel side fa-sock guide 5. In a disadvantageous case, two parallel sides G' and H' are formed which are slightly narrower than the above-mentioned two parallel sides G and H, and the stepped portions of both parallel sides also serve as stoppers. In order to engage one end of the second locking member 9 in the longitudinal direction (in the direction of the two parallel sides G and H) with the two lock holes 2b, two locking members are inserted in accordance with the pitch of the lock holes 2a. Protrusions 9a, 9
a has a bifurcated shape. 9b is a hole for connecting this second locking member 1 to an interlocking transmission member.

With the structure described above, when the second locking member 9 of this example is slid in the direction of arrow B-B', the two protrusions 9a are simultaneously engaged and separated from the locking hole 2b.

Since the pitch of the locking holes 2b is reduced to about 1/2 of that of the conventional device, the width W of the protrusion 9a is about 1/2 of the width W of the second locking member in the conventional device. Since two protrusions 9a are provided, each of which is configured to engage with the locking hole 2b, the lower rail 2' and the second locking member 9 are relatively free from impact in the direction of arrow C-C. When the locking member 9 receives a force, the locking member 9 transfers the above impact force to the two protrusions 9a.
The effective cross-sectional area is almost the same as that of the conventional device.

In this embodiment, the second locking member 9 is provided with a slot-like opening 9C in its longitudinal direction, and protrusions 9d and 9e' for inside the spring strip are formed in the longitudinal direction at both ends of the opening 9c. do.

One end of a coil spring 6' for urging the second locking member 9 is fitted onto the spring guiding projection 9d, and its base supports the urging force of the spring 6'. The other end of the coil spring 6' is fitted onto the spring guide projection 9e and brought into contact with the bracket portion 5a of the lock guide 5. With this configuration, the second lock member 9 can be biased in the direction of arrow B without attaching a separate spring receiver to the second lock member 9.

Furthermore, since the coil spring 6' is not fitted externally to the second locking member 1 but is housed in the opening 9C, the coil diameter of the coil spring 6' can be made small, and the entire locking device is It can be made small and lightweight.

As detailed above, when the present invention is applied, the slide pitch can be reduced to about 1/2 compared to the conventional seat adjuster lock device without reducing the strength.
Moreover, the entire locking device is compact.

It can be configured to be lightweight.

[Brief explanation of drawings]

Figures 1 to 3 show a conventional seat adjuster locking device, Figure 1 is a plan view of the upper rail and lower rail with the second locking member attached, Figure g2 is a side view of the same, and Figure 3 is the first It is an AA sectional view of the figure. 4 and 5 show an embodiment of the present invention, FIG. 4 is a plan view of the vicinity of the second locking member, and FIG. 5 is a sectional view taken along line DD in FIG. 4. 1 Second locking member, 2, 2', lower rail, 2
a, 2b...Lock holes arranged in a row on the lower rail,
3... Upper rail, 4... Roller, 4'... Ball, 5... Lock guide, 6, 6' Coil spring, 7. Spring receiver, 8. Spring, 9. Second lock member, 9a. shaped projection, 9b... hole for connection, 9c... opening for storing spring, 9a, 9
e. A certain internal protrusion of the spring. Patent Applicant: Ichikoh Industries Co., Ltd. Agent: Patent Attorney: Tadashi Akimoto Figures 3 and 4. -'' Figure 5 Procedural Amendment (Voluntary) July 20, 1980 Kazuo Wakasugi, Commissioner of the Patent Office Mr. 1. Indication of the Case 1987 Patent Application No. 201S'Otsu/Ribumi 2. Name of the Invention Seat Adjuster Lock Device 3, intermediary with the person making the amendment f'1 Patent applicant (:, l <iVj' (Residence) Tokyo Parts Industry Ward Higashigotan I11! Chome/θ No. 1g It name (Name) (013 )
Ichiko Koso Co., Ltd. 4, Agent 5, Date of amended order: Showa, month
1-((1) The claims in the specification are amended as follows. a pair of upper rails each of which is slidably guided by and carries a seat; and a first rail that is slidably supported by one of the pair of upper rails and is engaged with and disengaged from a locking hole in the lower rail. a locking member, and a second locking member that is slidably supported on the other of the pair of upper rails and is driven by the first locking member via an x9 interlocking member to engage and disengage from the locking hole of the lower rail. In the locking device for a seat adjuster for an automobile, the first locking member is formed into a bifurcated shape at one end in the direction of engagement and disengagement, and has nine ends so that it can engage and disengage from two lock holes at the same time. (2) A lock device for a seat adjuster characterized in that the second lock member is provided with an opening. ``member'' to ``fit both ends externally'' on the same page/line q to ``form one end of the first locking member in the locking/disengaging direction into a bifurcated shape and fitting it into two lock holes at the same time.'' configured to be able to be engaged and detached, and
An opening is provided in the second locking member, and a coil spring is housed in the opening to correct the second locking member. (3) In the specification, in the Detailed Explanation of the Invention column, from page g/line B, ``2 sides G, H, also'' to ``/end,'' at the end of line q of the same page, Sides G' and H' are formed near the tips of the sides G and H, with tapers in the tapering direction, and the tips are corrected. that's all

Claims (1)

[Claims] a pair of lower rails fixed to the floor of the vehicle compartment with locking holes arranged in a row; a pair of upper rails each slidably guided by the pair of lower rails to support a seat; a first locking member that is slidably supported on one of the pair of upper rails and can be engaged with and disengaged from the locking hole of the lower rail; and a first locking member that is slidably supported on the other of the pair of upper rails; A locking device for a seat adjuster for an automobile comprising a second locking member that is driven by the first locking member via an interlocking member to engage and disengage from a locking hole of the lower rail, wherein the second locking member is formed into a plate shape having two parallel sides, and one end in the direction of the two sides is formed into a bifurcated shape, so that two sides are formed at the same time.
and the second lock hole.
Slot-shaped openings are provided in the two parallel sides of the locking member, and projections for guiding springs are formed at both ends of the openings, and both ends of the coil spring are externally fitted into the two projections around ξ. A locking device for a seat adjuster, characterized in that the above-mentioned coil spring is housed in an opening of the second locking member to bias the second locking member in two parallel sides.