JPH07194454A - Chair - Google Patents

Abstract

PURPOSE: To make setting-up of a seat plate of a chair extremely simple, by making a guide means for a pin and a slot be constituted of a vertically upward extending pin and an almost horizontally extending slot to cooperate with the pin. CONSTITUTION: A supporting leg 1 and a front edge part 2a are connected by a supporter including a guiding means for both a slot and a pin, in order to rotate a seat part in the vertical direction. This slot and pin guiding means extends upward in the vertical direction and is composed of the pin 5 fixed at the front of the supporting leg 1 and the slot 6. The pin 5 is set up on a tube 1a of the supporting leg 1, and its head is simply guided through an expanded hole formed at the front edge part 2a of the seat plate 2. Then, the seating plate 2 is pushed backward along the slot 6 to arrange properly both a hole of the rear edge part 2a and a hole provided on a rocking lever, and is fixed simply by screws. As a result, when a user leans on backward, the seating plate 2 is pulled back with a less friction by the backrest 3, and when he/she leans on to the front, it is pushed forward again.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a chair of the type described in the preamble of claim 1.

[0002]

2. Description of the Related Art Various chairs having various shapes and structures are known. The support leg, seat plate and backrest are often assembled after being made as separate parts. However, making and attaching the seat plate-support leg connection is relatively expensive.

From US Pat. No. 5,106,157 a chair is known which comprises the following parts. a) fulcrum, b) a seat part having a seat plate and a backrest capable of limited and constant movement with respect to each other and the fulcrum, c) guiding and rotating the seat part in a longitudinal (longitudinal) direction. A supporting device having at least one slot and a pin guiding device for enabling connection between the supporting leg and the front end of the seat, d) extending rearward and connecting with the supporting leg by a hinge connection , At least one locking lever connecting the fulcrum to the rear end of the seat and the backrest, wherein the pivoting movement of the backrest forward or rearward results in a substantially horizontal movement of the front end of the seat, A locking lever adapted to cause a greater upward or downward movement of the rear end of the part, e) at least one spring element holding the backrest in its rest position so as to tilt it forward.

In this chair, the support device is formed by the joints guided by the pins in the slots. A plurality of coil springs, the pressure of which can be changed by the adjusting rod, are engaged with this joint portion. When a person gets out of the chair, the joint portion of the person moves forward due to the pressure of the spring, and the backrest is inclined and held forward in the rest position.

When assembling the chair, the front end portion of the seat portion is screwed into the joint portion. However, this support device is relatively expensive and requires a relatively large mounting location below the front end of the seat with engaging spring elements.

[0006]

The object of the present invention is therefore to further improve the chair according to the preamble of claim 1,
It is to make the installation of the seat plate easier.

[0007]

This object is constituted by a slot and a pin guiding device described in the characterizing feature of claim 1 by a pin extending vertically upward and a slot extending substantially horizontally and cooperating with the pin. This is solved by the present invention. By introducing the pin into the slot, the front end of the seat and the support leg can be easily connected. To secure the rear end of the seat, one simply pushes the seat into the desired position by means of the slot and pin (slot pin) guides described above.

Other specific configurations are as described in the dependent claims.

In a preferred embodiment, the pin comprises a shank and a wider head, and the slot has a slotted main part and a keyhole with an enlarged hole at one end of the slot. It has a shape. In this case, the inner width of the slot-shaped main portion is slightly larger than the vertical of the shaft portion of the pin, and the inner diameter of the expanded hole is slightly larger than the diameter of the head. In this way, the support device is particularly easy to attach to the support leg at the front end of the seat.

In another preferred embodiment, the seat plate is capable of limited movement relative to the backrest and fulcrums. Also,
At least one rearwardly extending locking lever is provided. The locking lever is connected to the support leg by a hinge connection, and connects the support leg to the rear end of the seat and the backrest. The back-and-forth pivoting movement of the backrest is then coupled in such a way that it causes a substantially horizontal movement of the front end of the seat and a larger vertical movement of the rear end of the seat. The chair also comprises a spring element arranged between the supporting leg and the locking lever, by means of which the backrest is held in its rest position so as to lean forward.

In a particular embodiment of the chair, the rear end of the seat is connected to the rest of the seat via a bending band extending transversely to the seat. This increases the angle between the backrest and the seat plate when the backrest is pivoted rearward. During this simultaneous movement, the seat is pulled on the backrest. The resulting longitudinal displacement and pivoting movement of the seat is facilitated by a slot pin guide at the front end of the seat. By using the slot pin guide device according to the invention, the mounting of the seat plate is thereby simplified without impairing the movement of the chair.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in more detail below with reference to the drawings. FIG. 1 is an exploded perspective view showing a first embodiment of the present invention. The office swivel chair shown in FIG. 1 roughly comprises a seat with a supporting leg 1, a seat plate 2, a backrest 3 and a locking lever 4 extending rearward. The supporting leg 1 and the front end portion 2a of the seat plate are connected by a supporting device including at least one slot pin guiding device in order to guide the seat portion within a certain range in the longitudinal direction and to perform a rotational movement. The slot / pin guide device is composed of a pin 5 extending vertically upward and fixed to the front part of the support leg 1, and a slot 6 which is formed at the front end of the seat plate in cooperation with the pin 5.

The locking lever 4 is connected to the supporting leg 1 on one side by a hinge connection (rotating shaft 7), and on the other side, the supporting leg is attached to the rear end portion 2b of the seat plate and the backrest 3 as shown in FIG.
Connect as shown in. That is to say, the pivoting movement of the backrest 3 forwards or backwards is coupled such that it causes a substantially horizontal movement of the front end 2a of the seat plate and a greater upward or downward movement of the rear end 2b of the seat plate. .

A spring element (not shown) is provided near the rotating shaft 7, that is, between the supporting leg 1 and the locking lever 4.
The spring element is provided with a locking lever 4 so that the backrest 3 tilts forward in the rest position of the chair, i.e. in the unloaded state.
In advance. This spring element may be, for example, a coil spring, but is preferably made as a torsion bar spring.

The slot pin guide device will now be described in detail with reference to FIGS. FIG. 2 is a plan view of the seat plate 2 of FIG. FIG. 3 is a sectional view taken along line III-III in FIG. FIG. 4 is a partial cross-sectional view of the supporting device taken along the line III-III of FIG. 5 is a partial cross-sectional view of the support device taken along the line VV of FIG.

The pin 5 comprises a shaft portion 5a and a head portion 5b wider than the shaft portion 5a. The slot 6 has a slot-shaped main portion 6a having a constant width and a wider hole 6b at one end of the slot, and is in the shape of a keyhole. In this case, the inner width of the slot-shaped main portion 6a is slightly larger than the diameter of the shaft portion 5a of the pin 5, and the inner diameter of the expanded hole 6b is slightly larger than the diameter of the head 5b.

In FIGS. 1 and 2, the support device has a similar structure 2
It has three slot-pin guides, the slots 6 of which are arranged parallel and symmetrical to each other on both sides of the longitudinal central axis 2c of the seat plate.

A groove 2d having the width of the widened hole 6b is provided around the slot 6 in the seat plate 2, and the slot-shaped main portion 6a is defined by the two horizontal projections 2e. The upper surfaces of these horizontal protrusions 2e form a contact surface with the lower surface of the head 5b (FIG. 5).

As shown in FIGS. 4 and 5, in particular, the head 5b of the pin 5 has a substantially convex lens shape in cross section. Therefore, the upper surface of the horizontal protrusion 2e is adapted to have a complementary curvature with respect to the lower surface of the head 5b.

The pin 5 is mounted on the tube 1a of the support leg 1 which extends in the transverse direction with respect to the longitudinal center axis 2c of the seat plate 2. On the side of the seat plate 2 facing the tube 1a, a sliding rib 2f is provided at least near the slot. In the illustrated example, two sliding ribs are provided on both sides of the slot 6, respectively, which extend substantially 2/3 of the depth (depth) of the seat plate 2 and extend parallel to the longitudinal center axis 2c thereof. . Sliding rib 2
The f is supported on the support 8 on the tube 1a, which allows the seat plate 2 to move quietly and with very little friction with respect to the tube 1a. The support 8 is provided with a groove 8a for guiding the sliding rib 2f. The sliding rib also
It also helps to reinforce the seat plate 2.

The length of the shaft portion 5a is determined so that the seat plate 2 is guided with a very small clearance and at the same time with very little friction. The seat plate 2, as shown in FIG.
On the other hand, since the head 5b is not only displaced in the vertical (longitudinal) direction but also tilted, the head 5b also has a convex lens-like cross section taken along the line III-III, and the head 5b and the horizontal projection 2e can be rotated at any rotating position of the seat plate. The gap between and becomes as small as possible,
Moreover, the head 5b is made to roll (roll) on the horizontal projection 2e to some extent.

The seat plate will now be described in more detail with reference to FIGS. The rear end portion 2b of the seat plate 2 is connected to the rest of the seat plate via a bending band extending in a direction crossing the seat plate. In the example shown, this bending band comprises at least one bending bead 2 which extends across the seat plate 2.
It is formed by providing g. Bending bead 2g
Extends in the shape of an arc substantially symmetrical with respect to the longitudinal center axis 2c of the seat plate 2 and extends over the entire width of the seat plate 2. The two bent beads are arranged at relatively small intervals in the direction of the longitudinal center axis 2c.

It is preferable that the rear end portion 2b of the seat plate 2 has a longitudinal dimension of about 1/4, and at most 1/3 of that of the seat plate.
As shown by the solid line, the sheet is pre-biased so as to incline forward and upward in a stress-free state. The seat plate 2 is preferably made of a plastic material.

Next, the movement of the chair will be described with reference to FIG. The solid line display indicates a front upright state, and the dotted line display indicates a rearwardly inclined state. In the front upright state, the rear end portion 2b of the seat plate 2 inclined forward functions like a pelvic support. In the rearward inclined state, the rear end portion 2b becomes flat. That is, the angle between the rear end 2b and the rest of the seat plate becomes larger. Therefore, the angle formed by the rest of the seat plate and the backrest 3 also becomes large. In this way, the seat plate 2 and the backrest 3 are ideally matched to the structure and comfort of the seated person.

Although not shown, a spring element near the rotary shaft 7 urges the locking lever 4 in the direction of arrow 9,
With no load, the seat automatically becomes upright.

Therefore, the seat plate 2 and the backrest 3 can make a certain limited movement with respect to each other and the support leg 1. However, in order to facilitate this movability, it is necessary to provide two slot / pin guide devices near the front end portion 2a of the seat plate 2. When leaning backward, the seat plate 2 is pulled backward by the backrest 3, and when leaning forward, the seat plate is pushed forward again. In this pivoting movement of the backrest, the front end portion 2a of the seat plate 2 makes a substantially horizontal movement, while the rear end portion 2b makes a further upward or downward movement. This prevents the human leg or foot from rising during the pivoting movement.

The support device for connecting the supporting leg 1 and the front end portion 2a of the seat portion is not only a point that can be manufactured at a low cost, but especially the seat plate 2
It is outstanding in that it can be easily installed. For this purpose, the two heads 5b of the pin 5 fixed to the tube 1a need only be guided through the two widened holes 6b in the front end 2a of the seat plate 2. Then push the seat plate 2 backwards along the slot 6 to bring the rear end 2
The holes provided in b and the holes provided in the locking lever 4 are aligned so that they can be easily fixed by, for example, screws. The backrest 3 can also be fixed at the same time between the seat plate and the locking lever. In order to improve stability, it may be necessary to connect the backrest 3 to the seat plate 2 as well. An elbow rest 10 may be provided depending on the model of the chair.

FIG. 6 is an exploded perspective view showing the second embodiment of the present invention. The chair shown in FIG. 6 is especially for visitors. This chair roughly comprises a stand 1'made of a frame 1'a, a seat part with a seat plate 2 ', and a backrest 3'. The front end portion 2'a of the stand 1'and the seat plate 2'are connected to each other by the slot pin guide devices 5 ', 6'.
Connected by. This slot / pin guide device has almost the same structure as that of the first embodiment, but in this case, since the seat plate, the stand and the backrest are firmly connected to each other after assembling, the backrest, the seat plate and the stand in the first embodiment are connected. The special structure that causes relative mobility is not realized in this embodiment.

In the case of the chair shown in FIG. 6, the seat plate can be attached to the stand in a particularly simple manner. That is, first, insert the slot pin guide device and move it to connect.
Then the rear end of the seat plate can simply be screwed into the support or at the same time into the backrest.

[0030]

As described above, according to the present invention,
In the chair of the type described in the preamble of claim 1, there is an effect that attachment of the seat plate is extremely simple.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a first embodiment of the present invention.

FIG. 2 is a plan view of a seat plate 2 of FIG.

FIG. 3 is a sectional view taken along line III-III in FIG.

4 is a partial cross-sectional view of the support device taken along line III-III in FIG.

5 is a partial cross-sectional view of the support device taken along line VV of FIG.

FIG. 6 is an exploded perspective view showing a second embodiment of the present invention.

[Explanation of symbols]

In the claims, the constituent elements are indicated by the reference numerals of the drawings, and the duplicated description will be omitted.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Werner Sauer Germany Spränge, Am Siegelhof 16 (72) Inventor Klaus Frank Germany Fran, Hannover, Schpan Hagenstraße 43

Claims (10)

[Claims] 1. A support leg (1,1 '), a seat portion comprising a seat plate (2,2'), a backrest (3,3 '), the support leg (1,1') and the seat portion. Front end (2a, 2 '
a) a chair comprising at least one slot and a support device which is connected by a pin guide device (5, 6; 5 ', 6'), the slot and pin guide device comprising a vertically extending pin ( 5, 5 ') and a slot (6, 6') which extends substantially horizontally and cooperates with the pin. 2. The pin (5, 5 ') has a shaft portion (5a) and a head portion (5b) wider than the shaft portion, and the slot (6, 6') is a slot-shaped main portion (6a). ) And a widened hole (6b) at one end of the slot, the inner width of the slotted main part is slightly larger than the diameter of the shank of the pin, The inner diameter of the hole
The chair of claim 1, wherein the chair is slightly larger than the diameter of the head. 3. Chair according to claim 1 or 2, wherein the pin is fixed to the front part (1a) of the support leg (1,1 ') and the slot is made in the front end part (2a) of the seat part. 4. The support device comprises two slots of similar construction and a pin guide device, the slots (6, 6).
6 ') are arranged on both sides of the longitudinal central axis (2c) of the seat in parallel and symmetrically with each other.
A chair according to any one of 3 to 3. 5. The seat plate is capable of limited movement with respect to the backrest and the fulcrum, and at least one rearwardly extending locking lever (4).
Is connected to the supporting leg (1) by a hinge connection (rotating shaft 7), and the lever connects the supporting leg to the rear end portion (2) of the seat portion.
b) and the backrest (3), the forward or rearward pivoting movement of the backrest causes the front end portion (2) of the seat portion to move.
a) causing a substantially horizontal movement of the seat and a greater upward or downward movement of the rear end (2b) of the seat, holding the backrest (3) in its rest position so that it leans forward. 5. A chair comprising at least one spring element, said spring element being arranged between said support leg (1) and said locking lever (4).
Any one of the chair. 6. Chair according to claim 5, characterized in that the cross section of the head (5b) of the pin (5) is substantially convex lens-shaped. 7. A bent band (bent bead 2g) extending at a rear end portion (2b) of the seat plate (2) in a direction crossing the seat portion.
The chair according to claim 5 or 6, wherein the chair is connected to the other part of the seat plate via the. 8. Chair according to claim 7, characterized in that the bending band is formed by at least one bending bead (2g) made in the seat plate (2) and extending transversely thereto. 9. The bending bead extends over the entire width of the seat plate (2) in a substantially arc shape symmetrical with respect to the longitudinal center axis (2c) of the seat portion. 8 chairs. 10. A rear end portion (2b) of the seat plate (2) is
10. The longitudinal dimension reaches 1/4 to 1/3 of the seat plate and is pre-biased so as to incline forward and upward in a stress-free state. The chair of item 1.