JPS60502188A - articulated chair - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] articulated chair 〔Technical field〕 The present invention can be used without applying great force and without the user getting up from the chair. Articulated type that allows the user to continuously change the relative posture between the backrest and the seat. Regarding chairs.

[Background technology]

French Patent No. 82.08'778 of May 19, 1982 in the name of the applicant The backrest and seat are rotatably connected to each other about a movable axis. There are also chairs provided. This backrest is centered on an axis parallel to the movable axis. The support structure is rotatably connected to the support structure. This backrest and seat (well, the back too A posture where the lean is almost vertical and the seat is almost horizontal, and the backrest and seat are both There is a continuous relative displacement between the two sides and the almost horizontal position. According to the French patent If so, the feature of this chair is that at least the displacement of the seat relative to the backrest is It is designed to be guided along a predetermined curve on the opposite side of the pivot shaft. This curve is the shape of the chair when the backrest and seat are displaced between the two positions mentioned above. The center of gravity of the user's body is set so that it is only slightly displaced from the horizontal plane.

Therefore, it will be located very close to the user's balance position, so it will be placed on the chair. To change the user's position, apply a very small amount of force to the seat or back. Just that is fine.

The main advantage of this chair is that it can produce extremely small amounts of force on the back, which even elderly and disabled people can produce. By adding it to the sauce and the seat, you can change the relative posture of the two. Ru.

[Disclosure of the invention]

The object of the present invention is to improve the embodiment described in the French patent and to improve the embodiment described in the French patent by: The purpose is to provide some variations.

A first variant concerns a chair with a leg rest pivoted to the seat.

In one embodiment of the French patent, the chair has a seat and a backrest. There is also a leg rest. This leg rest is the pivot point between the seat/backrest. and the seat is rotatable about an axis parallel to the axis between the backrest/support structure. It is pivoted to the This leg rest is installed in a suitable guide groove placed on the seat. Due to the action of rollers guided and attached to the leg rest, it is almost the same as the backrest. Displaces between vertical and nearly horizontal positions.

The object of the invention is to improve such a chair with a leg rest pivotally connected to the seat. There are many.

3 According to a first variant according to the invention, this chair is characterized by a pivot point between the seat/backrest. Rotation about a pivot axis parallel to the pivot axis between the seating axis and the backrest/support structure It is movably pivoted to the seat, is equipped with a shoulder rest, and has a Positioned beyond the pivot axis between the seat/backrest with respect to the pivot axis between the backrest/support structure rumored to include a means for pivotally connecting the leg rest to the legs relative to the seat by changing the angular position of the backrest relative to the support structure The corner position of the rest can be changed.

In an advantageous embodiment of the invention, the connecting hand between the leg rest and the backrest is provided. The step consists of a small tier that is pivotally connected to the leg rest at one end and pivotally connected to the backrest at the other end. comprising at least one connecting rod, said connecting rod being a slide pivotally connected to the backrest; It is connected to the backrest via a holder.

Such an arrangement offers significant economic advantages. Because, for example Compared to the embodiment shown in FIG. 18 of the French patent, the rotary roller attached to the leg rest Two complex grooves in the large side panels of the car and seat It is possible to eliminate the guide mechanism consisting of the can be replaced by a mechanism with a simple pivot that cooperates with the existing components of the chair? It is et al.

In the embodiment described in the French patent, the relative displacement between the backrest and the seat A groove mechanism is provided to guide the reed, and the pivot shaft between the backrest/support mechanism/seat. A pivot or roller provided is adapted to move within said groove. These grooves are Special profile designed to ensure that the user's center of gravity is only slightly displaced It is equipped with

According to a second variant according to the invention, said backrest has a fixed pivot axis on one side. rotatably pivotally connected to the support structure at the center and an intermediate support surface at the other end; The backrest is connected to the seat via an axis line that is integral with the intermediate support surface. The other end of the intermediate support surface is pivotally connected to the intermediate support surface, and the other end of the intermediate support surface is connected to one of the seats and the connecting rod. The connecting rod is pivoted at the same time as the other end of the connecting rod, and the other end of the connecting rod is connected to a fixed shaft located near the fixed axis. The backrest is pivoted to the support structure so as to be rotatable about the fixed axis. It is pivoted. , the first advantage of this modification is that it is possible to change from one posture to another. When changing the angle between the backrest and the seat, The second advantage is that the intermediate support surface provides flexibility and comfort. The advantage is that the guide groove can be made straight since there is no need to make it into a special curve.

According to a third variant of the invention, the sheet guiding means comprises a connecting rod, and one of the connecting rods One end is pivotally connected to a support structure for rotation about a fixed axis, and the other end is flush with the seat. It is pivoted to the axis of the body. This configuration means that the friction acting on the connecting rod is always connected to the pivot shaft. It has the advantage of being able to reduce friction because it is smaller than the friction between it and the guide groove.

According to a fourth variant of the invention, the sheet guiding means is arranged in a slot provided in the sheet. It has two movable connecting rods pivoted on the same axis, the other end of one connecting rod being the other end of the other connecting rod is pivoted to the support structure for rotation about a fixed pivot axis; with respect to the pivot axis between the backrest/support structure and beyond the pivot axis between the backrest/seat. is pivoted to the backrest so that it can rotate about an axis located on the backrest. . This configuration has the advantage of being able to reduce friction, similar to the third modification.

According to a fifth variant of the invention, the sheet guiding means comprises a deformable parallelogram. , one side of the four sides of this parallelogram consists of a part of the sheet, and this parallelogram One of the pivot axes of the shape coincides with the backrest/seat pivot axis, and one of the pivot axes of the The pivot axis located opposite the axis rolls on a fixed inclined surface (cam surface) provided on the support structure. Supports the working rollers. In this way, instead of the shaft moving within the guide groove, Friction can be further reduced by using rollers that transfer the friction.

[Brief explanation of the drawing]

Other features and advantages of the invention will become apparent following the description below. to the drawing 1 is a perspective view of the articulated chair of the present invention, and FIG. 2 is a partial view of the chair. Side view, 3, 4 and 5 are schematic diagrams of the chair in three different positions; Figure 6 is a side view of a part of a modified example of the articulated chair, and Figures 7 to 10 are further views. It is a schematic diagram of four modification examples of.

[Best mode for carrying out the invention]

The embodiments shown in Figures 1 to 5 are taken from Figure 1 of French Patent No. 82.08778. This is a reproduction of the embodiment shown in FIG. 6, and the present invention is an improvement on this embodiment. be.

This chair is a plastic garden chair with a backrest of 100mm and a seat. It has 1o2 and 4 legs 103 and 104, and there is an armless on the top of leg 103. 103a can be attached.

Similar to the embodiments of FIGS. 1 to 6 of the French patent, the backrest 100 is horizontal. The rear leg 103 is pivotably fixed and rotatable about the axis @X-X'. The seat 102 is rotatable about a horizontal but movable axis Y-Y'. It is pivoted to.

A roller is attached to the leg 104. These rollers are mounted on ball bearings It can also be coated with a low-friction material. These rollers are The backrest 100 is in a vertical position in cooperation with the groove 105 provided in the side plate 106 of the backrest 102. The seat 102 is displaced by a predetermined amount when tilting from a vertical position to a horizontal position or vice versa. It is something that can be done. This displacement means that the user's center of gravity moves only a very small distance in the vertical plane. Older people and people with physical disabilities do not have to use the force required to change from one position to another. This is something that even a person can produce.

Improvements made to the embodiment of the French patent include the leg rest 131 and its construction. This is because a moving mechanism is provided (see Figures 1 and 2).

The connecting rod 4a shown in FIGS. 2 and 3 of the French patent is an embodiment of the present invention. has been abolished and replaced with slider 134. This slider 134 has two straight It is equipped with a connecting rod 133 that constitutes the operating mechanism of the leg rest 131. be.

The leg rest actuation mechanism includes two ear lugs 132, and these ear lugs 132 is pivotably attached to the seat 102 on one side so as to be rotatable about the horizontal axis N-N'. and the other is rotatable about the horizontal axis P-P'. It is pivotally connected to a connecting rod 133 of. The other end of the connecting rod 133 is aligned with the horizontal axis M-M' The slider 134 is pivotally connected to the slider 134 so as to be rotatable about the center. are pivotally connected to the backrest 100 so as to be rotatable about the horizontal axis Q-Q'. Ru. Finally, similar to the connecting rod 4a of FIGS. 2 and 3 of the French patent, The rider 134 is provided with a groove 105b. However, in the present invention, the legs 104 This is what displaces the slider 134 relative to the sheet 102 in cooperation with the rollers. This is the groove 105b.

When the backrest 100 is in the vertical position (FIG. 3), the seat 102 is in a low position. The roller 107 fixed to the leg 104 is in contact with the upper end of the groove 105.

The slider 134 is located at the rearmost position, and the connecting rod 133 is seated with the axis P-P' 102 By holding the seat leg rest 131 in an extreme position toward the rear, the leg rest 131 can be placed in a vertical position. is holding strong.

When the backrest 100 starts to tilt (Fig. 4), the seat) 102 and slider 13 4 and leg rest 131 rotates around a fixed axis x-x'. Begin to. However, at the same time, due to the cooperative action of the roller 107 and the groove 105, the sheet 102 begins to swing around the axis Y-Y'. This rocking motion is nine seats The front of 102 is slightly raised.

At that time, the seat 102 to which the slider 134 is pivotally mounted swings and the roller 07 and the groove 105b cooperate, so the slider 134 moves around the axis Q-Q'. and sway by itself. This axis Q-Q' is similar to the axis Y-Y' with respect to the axis x-x'. Since y is located far away, the linear displacement of the axis Q-Q' is equal to the axis y- for the same angular displacement. It is larger than the linear displacement of y'. As a result of the large displacement of the axis Q-Q', Rider 134 is advanced relative to seat 1o2. This forward movement causes continuous The contact rod 133 applies thrust to the axis P-P' and rotates the leg rest 131. Ru. The leg rest is therefore pivoted towards a horizontal position.

In the final stage of the movement (FIG. 5), the roller 107 almost hits the lower end of the groove 105. When it hits, the shape of the groove 105 allows rotation around the axis x-x'. raises the rear part of the seat 102, and the groove 105 places the seat 102 in a horizontal position.

The slider 134 continues to move forward until the leg rest 131 is in a horizontal position. Continue its rotational motion.

Although the angular displacement of the leg rest and the angular displacement of the backrest are linked, the angular displacement of both is It should be noted that they are not the same. The angular displacement of the leg rest is also determined by the pivot axis N -N' and p -p' as well as the pivot axis Q -Q' It is a function of the difference between the trajectory and the trajectory of Y-Y'. The difference in the trajectory is at the same time the fixed axis -X' is a function of the distance between axis Q -Q' and axis Y -Y'. .

As the pivot axes aQ, , -Q' move away from the pivot axes, lines Y-, Y', the same angle As the trajectory of Q-Q' with respect to the displacement curves, the sheet 102 and the slider 134 becomes large. Therefore, from N-N' to p-p' If the distance is fixed, (j - Q' is moved away from Y - Y' , the angular displacement of the leg rest increases.

When the backrest 100 is raised vertically in the opposite direction, the seat 102 is slightly lowered, while the slider 132 is articulated while moving the seat back significantly. The rod 133 (therefore, the part of the leg rest that is pivoted about the axis P-P') Displace. For this reason, the leg rest is rotated counterclockwise around the axis N-N'. is rotated to return to a vertical position.

As in the French patent, the backrest 100 and the seat 102 are not tightened. It can be locked in various positions by lever 109. However, furthermore, The bar 109 opens the slider 134 at the same time.

The leg rest 131 is locked by pressing the button.

The method of assembling the backrest 100 and the seat 102 and their relative positions are as described above. 1 to 7 of the patent, the vertical center of gravity of the user of this chair is The basic advantage of small displacements is ensured.

However, there is at least one additional advantage over the two embodiments of the French patent. It is possible. That is, the advantage over the first embodiment is that the leg rest 131 is provided. The second embodiment provides increased comfort without significantly increasing cost. The advantage to Ru.

The chair according to the embodiment shown in FIG. 3, and the support structure 153 has four legs 154 and 155.

An intermediate support surface 156 is provided between the backrest 151 and the seat 152.

This support surface 156 is pivoted to the base of the backrest 151 at a pivot axis 157. and is pivotally connected to the rear of the seat 152 by a pivot axis 158.

The backrest 151 is rotatably pivoted to the support structure 153 about a fixed axis 159. Additionally, the sheet 152 is provided with two rollers 160. roller 160 are provided on each side of the seat 152, and grooves 1 provided on the support structure 153 Move within 61.

Two connecting rods 162 (one on each side of the seat) are connected to one side. It is pivotally connected to the support structure 153 so as to be rotatable about the fixed axis 163. a pivot axis 158 connecting intermediate support surface 156 and seat 152 on the other hand; It is pivoted to.

The operation of the chair in this example is as follows.

When moving the backrest 151 from a vertical position to a horizontal position, the backrest 151 is moved backward. The sheet 152 is moved in the opposite direction while swinging. Groove 161 is sloped When the seat 152 reaches the horizontal position, its front part first and then its rear part comes to the height of the backrest.

Intermediate support surface 156 and connecting rod 162 allow for change from one position to the other. Provides greater flexibility and increased comfort for the user when moving . Furthermore, the shape of the guide groove of the sheet can be made straight.

In the embodiment shown in FIG. 8, the chair has a backrest 171, a seat 172, A support structure 173 with four legs 174 and 175 is provided.

3 The backrest 171 is pivotally connected to the support structure 173 for rotation about a fixed axis 176. has been done. The seat 172 and the backrest 171 are pivotally connected to each other by an axis 177. ing.

One end of the two connecting rods 178 has a support structure rotatable about a fixed axis 1'80. 173 is pivotally connected to a leg 174 of the sys- tem, and the other end is rotatably mounted on a shaft 174 about a pivot axis 179. It is pivotally connected to the port 172.

The difference from the operation of the embodiment shown in Fig. 7 lies in the sheet guiding mechanism consisting of grooves and rollers. Instead, two connecting rods 178 are used.

When the backrest 171 swings from the vertical position to the horizontal position, the seat 172 moves forward. Move to. The seat 172 is brought into its normal position by two connecting rods 178. It will be done. Therefore, the function of the connecting rod 178 is, for example, the groove 161 and roller of FIG. This function is the same as that of 160.

In addition to the simple structure of this embodiment, the pivot shaft and roller slide within the groove. The advantage is that friction is greatly reduced compared to other mechanisms.

In the embodiment shown in FIG. 9, the chair has a backrest 191, a seat 192, four legs 194, 195 and a support structure 193.

The backrest 191 is pivotably connected to the support structure 193 about a fixed axis 196. It is. Seat 192 and backrest 191 are rotatable about pivot axis 197 They are linked to each other in Noh.

The crosspiece 200 is continuous with the backrest beyond the axis 197. This horizontal member 200 is It forms one side of a formable parallelogram. The other three sides of this parallelogram are sheet 1 92 and two connecting rods 201 and 202. articulation One end of the rod '201 is rotatably connected to the seat 192 about an axis 204. The connecting rod 202 is pivotally connected to the cross member 200 so as to be rotatable about an axis 206. It is.

On the other hand, these two connecting rods are rotatably pivoted to each other about an axis 205. ing. This axis 205 is provided with at least one roller 199, which Roller 199 rolls on an inclined surface 198 fixed to support structure 193.

When the backrest falls backwards, the cross member 200, which is an integral part of the backrest, It rotates with the backrest about a fixed axis 196 and connects the connecting rod 202 and rotating rod. Push the controller 199 forward. The roller 199 is connected to the cross member 200, the connecting rod 202, and the connecting rod 2. Since the parallelogram composed of 01 and the sheet portion 203 is deformable, the inclination The cam movement caused by roller 199 displacing on surface 198 causes the movement of sheet 192 to Raise the front. Therefore, the backrest 191 assumes a horizontal position at the same time as the rear of the seat. When this occurs, the front portion of the seat is brought to its normal position.

This configuration is said to reduce friction compared to a guide mechanism consisting of grooves and rollers. There are advantages.

Needless to say, the present invention is not limited to the above embodiments, but the scope of the present invention Various modifications can be made without departing from the above.

FIG. 6 shows a modification of the chair shown in FIGS. 1 to 5. Fixed pivot axis A pin 135 is provided on each connecting rod 133 to be pivotally connected to the rider 134. be. The bin 135 moves within a groove 136 provided in the slider 134. Regret Due to the weight of the slider, the bottle 135 hits the end of the groove 136, so the slider 1 The motion of 34 is transmitted to the leg rest. The advantage of the groove 136 is that it folds the chair into its smallest volume. Being able to fold up.

FIG. 10 shows an embodiment that is a modification of the embodiment shown in FIG.

The chair has a support structure 2 with a backrest 211, a seat 212 and four legs 214, 215. 13.

The backrest 211 is rotatably pivoted to the support structure 213 about a fixed axis 216. The seat 212 is rotatably attached to the backrest 211 about an axis 217. It is pivoted.

A link mechanism with a first connecting rod 218 is provided on each side of the chair. 1st series One end of the contact rod 218 is rotatably connected to the leg of the support structure 213 about the fixed axis 222. 214, and a pivot axis 220 is provided at the other end.

The pivot axis 220 moves within a slot 221 that is integral with the seat 212; At the same time, it supports one end of the second connecting rod 219. The other end of the second connecting rod 219 is the axis 2 It is pivoted to an extension of the backrest 211 at 23.

When the backrest 211 is in the vertical position, one end of the two connecting rods 218 and 219 is The supported pivot axis 220 is located at the rear of the slot 221.

When the backrest begins to rock backwards, the seat 212 and connecting rod 219 move forward. Ru. However, since the connecting rod 219 is pivotally attached to the backrest extension, the connecting rod 219 219 moves forward faster than the seat.

Therefore, the pivot axis 220 moves forward within the slot 221 and eventually moves out of the slot. It hits the front end. During this movement, the connecting rod 218 is moved from the inclined position at the beginning of the movement. The rod is moved to an almost vertical position at the end of the movement, and therefore plays the same role as the connecting rod 178 in FIG. accomplish

7 The present invention includes at least a backrest and a seat, and optionally a legrest. Applicable to all other types of chairs.

Finally, the various pivoting members are powered by a small horsepower prime mover controlled by the user. It is possible to The present invention is also applicable to bed pinerests.

Especially Sho GO-502188 (7) international search report INTERltlATIONAf, APPLICATION No, PCT /rR84100182 (jA 7702) US-A-35728293010 3/71 NoneFR-A-711928, None rR-A-734243None

Claims (1)

[Claims] 1 A support structure (103° 104) and a backrest (10 0) and a seat (102), the front The backrest and seat are in a state where the backrest is almost vertical and the seat is almost horizontal. The position where the backrest and seat are almost horizontal is continuous. The seat can be displaced relative to the backrest, and at least the displacement of the seat relative to the backrest is It is guided along a predetermined curve on the opposite side of the seat's pivot axis, and , when the backrest and seat are displaced between the two positions, the body of the user of the chair is In an articulated chair in which the center of gravity of the body is only slightly displaced from the horizontal plane, The chair has a pivot axis (Y-Y') between the seat/backrest and a backrest/support. Centered on the pivot axis (N-N') parallel to the pivot axis (XX/) between the supporting structures. Equipped with a leg rest (131) pivotably attached to the seat (102). and the pivot axis (x-x ’), the part located beyond the pivot axis 1 (Y-Y’) between the seat/backrest Means (133, 134, 135) for pivotally connecting legless (131) , 1:36) and a backrest (1:36) relative to the support structure (103, 104). By changing the corner position of the seat (102)) An articulated type characterized in that the corner position of (131) can be changed. Chair. 2. The connection means between the leg rest (131) and the backrest (100) is One end is pivoted to the legless (131) and the other end is pivoted to the backrest (100). claim 1, comprising at least one connecting rod (13:3) connected to the The articulated chair according to item 1. 3. The connecting rod (133) is connected to a slider (13) pivotally connected to the backrest (100). 4) The joint according to claim 2, which is connected to the backrest (100) via Combined chair. 4. The connecting rod (133) is rotatable around the horizontal pivot axis (M-M') The articulated type according to claim 3, wherein the articulated type is pivotably mounted on the slider (134). Chair. 5 Connection on the opposite side of the pivot axis between the connecting rod (133) and the leg rest (131) The end of the rod (133) has a groove (136,) provided in the slider (134). The joint according to claim 3, characterized in that a movable pin (135) is provided. Matching chair. 6 The backrest (151) is centered on the fixed pivot axis (159) on one side. is rotatably pivotally connected to the support structure (153) at the other end and an intermediate support at the other end. The backrest (151) is connected to the seat (152) via the surface (156). ) is connected to the intermediate support surface (156) by an axis (158) integral with the intermediate support surface (156). 56), and the other end of the intermediate support surface (156) is pivoted to the seat) (192). ) and one end of the connecting rod (162) at the same time. The end rotates around a fixed axis (163) located near the fixed axis (159). The backrest (151) is pivotably connected to the support structure (153), and the backrest (151) (159) as claimed in any one of claims 1 to 5 articulated chair. 7. The guide means for the seat (172) comprises a connecting rod (178), and the connecting rod (178) ) is pivoted to the support structure for rotation about a fixed axis (180); Claims 1 to 5, wherein the end is pivotally connected to an axis (179) integral with the seat. The articulated chair according to any of items 5 to 5. 8. The guide means of the seat) (212) is inside the slot) (221) provided in the seat. two connecting rods (218, 219) pivoted on the same axis (220) movable at ), and the other end of one connecting rod (218) is centered on a fixed pivot axis (222). The other end of the other connecting rod (219) is connected to the backrest/ The pivot axis (217) between the backrest/seat with respect to the pivot axis (216) between the support structure. ) The backrest is rotatable about an axis (223) located on the backrest beyond (211) as described in any one of claims 1 to 5. Articulated chair. 9. The guide means of (192) comprises a deformable parallelogram, and the guide means of Of the four sides (200, 201゜202.203) of the side, the − side is C) (19 2), one of the pivot axes of the parallelogram is on the opposite side. The axis (20'5) is aligned with the pivot axis (205) located at the support structure. Supports a roller (199) that rolls on a fixed inclined surface (198) provided at (193) An articulated chair according to any one of claims 1 to 5.