SE515219C2 - Bromsrecliner - Google Patents

Abstract

The invention concerns a device for adjustment of the relative angular positions between a first pivot element (20) and a second pivot element (21), said elements preferably located on the seat cushion (2) and the backrest (3), respectively, of for example a chair (1) or a vehicle seat. The pivot elements (20, 21) are arranged for pivotal movement about a common axis relative to which axis ring gears (25a, 25b) are arranged in an essentially centred position. The device further comprises at least one toothed wheel (23) meshing with said ring gears and being movable alont the circumference of the respective ring gear (25a, 25b) in response to rotation of said toothed wheel (23). The device also comprises a support element (22) formed with slide and friction faces, which circumscribe the toothed wheel (23) along at least part of the wheel circumference. In addition, the support element (22) is coupled to a control means (4). The support element (22) and the toothed wheel (13) are arranged to be pressed against one another, whereby the support element (22), upon adjustment of the angular position of the device, is urged against the toothed wheel (23) so as to exert driving pressure thereon and whereby the toothed wheel (23), upon torque loads on the device, is pressed against the support element (22).

Description

nu u u- »w- ... av» - u u ... -nv- 10 15 20 25 30 35 515 219 2 necessary as people of different lengths should sit strapped in the seat, would not be necessary. Placing the belt structure in the seat, however, further increases the stresses on the recliner mechanism in the event of a collision, and thus very strong locking devices are required, to prevent angular changes in the event of a collision. In addition, in vehicles, the control knob connected to the recliner mechanism is often poorly clamped, sandwiched between the lower part of the seat and the side wall of the vehicle, which further complicates the adjustment process, whereby an adjustment mechanism which is easy to maneuver and has a relatively small gear ratio is desirable. , while obtaining an efficient and secure locking. In other areas as well, for example office furniture and the like, there is a corresponding need for easy-to-operate angle actuators.

Object of the invention The object of the invention is thus to provide a recliner mechanism which is easy to set, but which effectively locks the setting in its set position during loading.

SUMMARY OF THE INVENTION This object is achieved by the invention in that the device also comprises a support means, which has sliding & friction surfaces, which at least partially circumferentially surround the gear wheel, and which support means is connected to an actuator, and in that the support means and the gear wheel can be pressed against each other, whereby the support means, when the device is angled, the driving force is pressed against the gear wheel and whereby the gear wheel, when the load is torque, is pressed against the support means. The body is thus, in the unloaded position, free to move both along the periphery of the gear ring and in some cases also radially relative to the gear ring, and is thus easily movable.

When maneuvering the actuator, the support member entails teeth. ... p o. 10 15 20 25 30 35 515 219 3 the wheel, which thereby rotates along the periphery of the gear ring.

When the load parts of the pivot parts are loaded, on the other hand, the gears rotate in opposite directions and thereby push the freely mounted gear wheel in a radial direction inwards, whereby the gear wheel is pressed against the support member and an effective reading is achieved. With greater torque, the locking force increased.

According to a preferred embodiment, the above-mentioned gear is of the double gear type with different radii between them, and said gear rings have different diameters.

This means that gearing can take place with little wear on the mechanical parts included.

According to a further preferred embodiment, the support member is slidable against both the tooth tops of the first and the second ring gear, which results in an increased mechanical stability in the construction.

Furthermore, suitably said support means are movably relative to the pivot parts both in the pivotal direction and in the radial direction and occupy substantially the entire width of the toothed rings, defined by the top parts of the tooth teeth, with recesses for said gear wheel. This also results in a more stable mechanical construction and ensures small movements of gears and support members, respectively, when reading the device.

Finally, said actuator suitably comprises a control knob arranged on one side of the first pivot part, a connecting means arranged on the opposite side of the second pivot part with support means and the connecting means arranged therebetween. enables a simple operation of the recliner device, by turning the control knob, whereby the support member, through contact, causes the gears to rotate along the ring gear.

Brief Description of the Drawings The invention will be described in more detail below by preferred embodiments of the invention, with reference to the accompanying drawings, in which Fig. 1 shows the location of a recliner mechanism according to Fig. 2a is a plan view of a first swivel part according to a first embodiment, and also shows the associated gears and support part, Fig. 2b is a plan view of a second swivel part according to the embodiment in Fig. 2a, and also shows associated gears and support part, Fig. 2c is a plan view of the first pivot part according to the embodiment in Fig. 2a and the second pivot part according to 2b, with associated cooperating gears and support part, Fig. 3a is a side view of a first pivot part and a second pivot part according to a second embodiment, with associated cooperating gears and support part, Fig. 3b is a plan view of the embodiment shown in Fig. 3a, seen in two different sections II and II-II, and Fig. 4 is a view having two reclining devices in accordance with the invention, which are intended to be placed on opposite sides of a chair, and which are connected to each other by means of a connecting rod.

Description of preferred embodiments Fig. 1 shows an overview view of a chair 1, comprising a seat cushion 2 and a backrest 3. The recliner device, in accordance with the invention, is placed at the joint between the cushion and the backrest. The mutual angular position between the seat and the backrest is regulated by means of a control knob 4.

Figs. 2a-2c show first and second pivot parts, respectively. 11, which are intended to be mounted in pairs at the rear edge of the seat cushion and the lower edge of the backrest, respectively.

The pivot parts in this embodiment consist of flat platform elements. On the first pivot part 10 a first gear ring 15a is arranged, and on the second pivot part 11 a second gear ring 15b is arranged. When mounting the swivel parts to the chair, the swivel parts are positioned so that the first and second gear ring, 15a and 156, respectively. 15b, the first and second pivot members are so mounted that they are substantially centered with each other. Furthermore, the mutual distance between the respective flat surfaces is small, in order to achieve a space-efficient and compact construction. In this embodiment, the first ring gear 15a has a diameter smaller than the diameter of the second gear ring 15b. In the opening, which in the mounted position of the pivot parts is delimited by the two toothed ring l5b, l3b inserted, which member is of double type, having two gears- The first tooth l5a resp. is a gear member 13a, elements with different radii between them. the wheel element 13a is adapted to run along the series of gears in the first gear 15a, and the second gear element 13b, which has a larger radius than the first gear element 13a, is adapted to run along the series of gears in the second gear 15b. The first and second gear elements are centered with each other and rotatably connected to each other. In this embodiment, in addition, the first gear has a round, suitably spined hole, which is adapted to rotatably receive a connecting rod (not shown), which for synchronized operation connects the device to the corresponding device on the opposite side of the seat 1. Furthermore, a support member l2a, l2b is inserted in the opening defined by the tooth l5b. This support member has the sliding and l5b rings 1a, friction surfaces facing the gear rings 1a, gear tips and the second gear 13b. In this exemplary embodiment, the play between the support member and the above components is small. This support member 12a, 12b is connected via a connecting coupling element 14 to a control knob (not shown in this exemplary embodiment).

Adjustment of the relative angular position takes place when the device is in an unloaded position, ie when no force is applied to the backrest 3. When turning the control knob 4, which via continuous coupling element 14 L ... .... _ .-..... . . . ., 10 15 20 25 30 35.

L1 '515 219 6 is connected to the support member l2a, l2b, carries the support member, which abuts against the toothed ring tops on respective gear rings l5a, l5b and against the second gear l3b, the second gear, and thus the first gear, which is made to rotate along the respective ring gear. Due to gearing in the traditional way, the relative angle between the pivot parts 10 and 11 increases or decreases, respectively, depending on the direction of rotation of the control knob. This rotation is easy, depending on the freely mounted gears.

On the other hand, when the device is subjected to torque load, the pivot parts are pressed in mutually opposite directions of rotation, whereby the double gear is affected by mutually opposite forces from the first and second gear ring, respectively. The double gear is thus pressed in a radial direction inwards, in the direction of engagement with the ring gears, due to the inclined side flanks of the teeth, see Fig. 2a, and is pressed against the support member, which prevents the gears from rotating and losing their engagement with the ring gears. This locks the device in position. At higher torque loads, only the forces on the gears become larger, with a greater opposite force as a result.

The embodiment shown in Figs. 3a-3b is structurally similar to the embodiment shown in Figs. 2a-2c.

Fig. 3b shows first and second pivot parts, respectively. 21, forming a unit, which pivot parts are intended to be mounted in pairs at the rear edge of the seat cushion and the lower edge of the backrest, respectively. The pivot parts in this embodiment consist of flat platform elements. On the first pivot part 20 a first gear ring 25a is arranged, and on the second pivot part 11 a second gear ring 25b is arranged. When mounting the swivel parts to the chair, the swivel parts are placed so that the first and second gear ring, 25a resp. 25b, are substantially centered relative to each other. Furthermore, the first and the second pivot parts are mounted so that their mutual distance between them in order that the respective flat surfaces are small, see Figs. 3a, 10 15 20 25 30 35 i. H- '515 219 7 provide a space-efficient and compact construction.

In this embodiment, the first gear 25a has a diameter that is smaller than the diameter of the second gear 25b. In the opening, which in the mounted position of the hinges is delimited by the two toothed rings 25a resp. 25b, two substantially identical gear means are inserted, which means are of double type, each having two gear elements 231, the gear element 23a being adapted to run along 23b with mutually different radii. The first teeth in the first gear ring 25a, and the second gear element 23b, which has a larger radius than the first gear element 23a, are adapted to run along the teeth in the second gear ring 25b. The first and second gear elements are in pairs centered relative to each other and rotatably connected to each other. Furthermore, a support member 22a, 22b is inserted into the opening defined by the ring gears 25a, 25b. This support member has sliding and friction surfaces against the tooth tips of the ring rings 25a, 25b and against the two other gears 23b. In this exemplary embodiment, the play between the support member and the above components is small. This support member 22a, 22b is connected via a through-going coupling element 24 to a control knob (not shown in this embodiment) on one side of the two pivot parts and to a support plate 5 on the other side of the two pivot parts, see Fig. 3a.

Furthermore, the embodiment shown in Figs. 3a and 3b is also functionally equivalent to the embodiment shown in Figs. 2a-2c. When the device is subjected to a moment load, oppositely opposite pivoting forces act on the pivot parts, the double gear being affected by forces from the first and second gear ring, respectively, in opposite directions. The two double gears are thus pressed in radial direction inwards, in the direction of engagement with the toothed rings, due to the inclined side flanks of the teeth, see Fig. 3b, and are thus pressed against the support member, which has such an extent that it provides frictional resistance to and prevents the gears from lose their grip on the ring gears. Thus, the device is read in its position. At higher torque loads, only the forces on the gears become greater, with a greater frictional force as a result. Furthermore, it can be mentioned that in use a connecting rod 30 (see Fig. 4) often connects the device to the corresponding device on the opposite side of the chair 1.

A number of modifications of the device are conceivable within the scope of the appended claims. For example, both gears may have the same diameter and the gear be a uniform constant diameter gear engaging both the first and second gears. In this case, the number of teeth in the first and second ring rings must be different, preferably have different modules, in order to achieve the desired relative rotation between them.

Furthermore, the number of gears can be greater than two, and the support member can be designed in different ways, and more or less fill the space defined by the gear rings and the gears.

Claims (3)

1. Device for adjusting the relative angle (10, 20) (11, 21) preferably arranged at, for example, a chair (2) 20, the position between a first and a second pivot part, (1) support or seat cushion or backrest (10, 11; 21) pivotable about a common geometric axis, (3), which pivot parts are arranged relative to which first and second, arranged on respective pivot part (15a, 15b; 25a, 25b), which device comprises at least one in said (13; 23), movable along the respective ring gear (15a, gear rings are substantially centered, which is front; 25a, 25b) (13: gear rings engaging gear gears peripherally by rotation of the gear in question 23), characterized in that the device also comprises a support member (l2; 22), which has sliding & friction surfaces, which are connected at least partially circumferentially (13: 23), (l2; 22) with an actuator (4), and by the support member (l2; 22) and the gear wheel (l3; 23) a, wherein the support member (l2; 22), when the angle is adjusted, the gear wheel and which support member are pressed against each other by the device, the driving force is pressed against the gear wheel (l3; 23) by the device, (l3; 23), at torque load (l2; 22). Device according to claim 1, wherein said gear wheel and wherein the gear wheel is pressed against the support member (13; 23) are of the double gear type (13a, 13b; 23a, 23b) with different radii between them, and said gear rings (15a, 15b; 25a, 25b) ) have different diameters. (12; 22) is slidable against both the first and the second gear (15a, 15b; 25a, 25b). A device according to any one of the preceding claims, wherein Device according to claim 2, wherein the support member has the tooth tips of the ring. said support means (l2; 22) are movable relative to the pivot parts (l0, ll; 20, 21) and occupy substantially the entire toothed rings both in the rotational direction and in the radial direction, (l5a, l5b; 25a, 25b), of the top portions of the tooth teeth defined out widening, with recesses for said gears (l3; 23). ,. . . . . Device according to any one of the preceding claims, wherein said actuator (4) comprises a control knob (4) arranged on one side of the first pivot part (10; 20), one on the opposite side of the second pivot part (11; 21). ) arranged abutment plate (5) and interconnecting means (14; 24) inextricably connected to the carrier (12; 22) therebetween. 1, -,.