Source: http://www.google.com/patents/US8025334?dq=7,468,661
Timestamp: 2017-03-23 10:36:47
Document Index: 537427695

Matched Legal Cases: ['art 6', 'art 5', 'art 6', 'art 5', 'arts 6', 'arts 6', 'art 6', 'art 6', 'art 5', 'art 6', 'art 5', 'art 4', 'art 6', 'art 5', 'art 6', 'art 5', 'art 6', 'art 6', 'art 6', 'art 6', 'art 6', 'art 6', 'art 5', 'art 6', 'art 5', 'art 6', 'art 6', 'art 6', 'art 5', 'art 6', 'art 4', 'art 6', 'art 6', 'art 6', 'art 6']

Patent US8025334 - Piece of furniture - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inPatentsA body support structure, such as a piece of furniture, in particular a piece of furniture for sitting on or a piece of furniture for lying on, such as, for example, chair, armchair, stool, bed or sofa, a seat of the piece of furniture being supported by a spring mechanism, and the spring mechanism being...http://www.google.com/patents/US8025334?utm_source=gb-gplus-sharePatent US8025334 - Piece of furnitureAdvanced Patent SearchTry the new Google Patents, with machine-classified Google Scholar results, and Japanese and South Korean patents.Publication numberUS8025334 B2Publication typeGrantApplication numberUS 12/958,798Publication dateSep 27, 2011Filing dateDec 2, 2010Priority dateMar 24, 2006Fee statusPaidAlso published asCA2646948A1, CN101495012A, EP2001338A2, EP2001338A4, EP2001338B1, US7857390, US20090261637, US20110067931, WO2007110732A2, WO2007110732A3Publication number12958798, 958798, US 8025334 B2, US 8025334B2, US-B2-8025334, US8025334 B2, US8025334B2InventorsJohann Burkhard Schmitz, Carola Eva Marianne Zwick, Roland Rolf Otto Zwick, Claudia PlikatOriginal AssigneeHerman Miller, Inc.Export CitationBiBTeX, EndNote, RefManPatent Citations (58), Non-Patent Citations (11), Referenced by (21), Classifications (19), Legal Events (1) External Links: USPTO, USPTO Assignment, EspacenetPiece of furniture
US 8025334 B2Abstract
A body support structure, such as a piece of furniture, in particular a piece of furniture for sitting on or a piece of furniture for lying on, such as, for example, chair, armchair, stool, bed or sofa, a seat of the piece of furniture being supported by a spring mechanism, and the spring mechanism being capable of being set to a weight force with which a person acts on the seat.
a spring mechanism operable to support a body support member;
a weighing mechanism comprising a height adjustment device, an axial bearing coupled to the height adjustment device and a spring element supporting the axial bearing, wherein the height adjustment device is moveable against the biasing force of the spring element in response to an application of a body force to the body support member independent of a height adjustment of the height adjustment device; and
a movement converter coupled between the weighing mechanism and the spring mechanism, wherein a biasing force of the spring mechanism is adjustable in response to a movement of the height adjustment device against the biasing force of the spring element.
2. A body support structure comprising:
a movement converter coupled between the weighing mechanism and the spring mechanism, wherein a biasing force of the spring mechanism is adjustable in response to a movement of the height adjustment device against the biasing force of the spring element, wherein the movement converter comprises a cable coupled between the weighing mechanism and the spring mechanism.
3. A body support structure according to claim 2 wherein the movement converter further comprises a coupling arranged on the pressure tube, and wherein the cable comprises a first cable coupled between the weighing mechanism and the coupling, and a second cable coupled between the coupling and the spring mechanism.
4. A body support structure according to claim 3 wherein the coupling is adapted to permit relative rotation about a vertical axis between the weighing mechanism and the spring mechanism.
5. A body support structure according to claim 4 wherein the coupling comprises an upper ring vertically and non-rotatably moveable relative to a lower ring.
6. A body support structure according to claim 5 further comprising an inner ring rotatably moveable relative to the upper ring.
7. A body support structure according to claim 6 wherein the inner ring is rotatable with the spring mechanism relative to the upper and lower rings, which are non-rotatable relative to the weighing mechanism.
8. A body support structure according to claim 2 wherein at least a portion of the weighing mechanism is arranged in a housing.
9. A body support structure according to claim 8 wherein the housing comprises a counterbearing for a guide housing the cable.
10. A body support structure according to claim 1 wherein the height adjustment device comprises a pneumatic spring having a pressure tube and a piston rod moveable in the pressure tube.
11. A body support structure according to claim 10 wherein the piston rod is coupled to the axial bearing.
12. A body support structure comprising:
a weighing mechanism comprising a height adjustment device and a spring element supporting the height adjustment device, wherein the height adjustment device is moveable against the biasing force of the spring element in response to an application of a body force to the body support member independent of a height adjustment of the height adjustment device; and
a movement converter coupled between the weighing mechanism and the spring mechanism, wherein a biasing force of the spring mechanism is adjustable in response to a movement of the height adjustment device against the biasing force of the spring element, wherein the movement converter comprises a rotor system operable to permit relative rotation between the weighing mechanism and the spring mechanism about a vertical axis.
13. A body support structure according to claim 12 wherein the movement converter comprises at least one cable coupled between the weighing mechanism and the spring mechanism.
14. A body support structure according to claim 12 wherein at least a portion of the weighing mechanism is arranged in a housing.
15. A body support structure according to claim 12 wherein the height adjustment device comprises a pneumatic spring having a pressure tube and a piston rod moveable in the pressure tube.
16. A body support structure according to claim 12 wherein the rotor system comprises at least a first ring rotatable relative to a second ring, and wherein the movement converter further comprises a first cable coupled between the weighing mechanism and the first ring, and a second cable coupled between the second ring and the spring mechanism.
17. A body support structure according to claim 16 wherein the first ring comprises a first lower ring and a first upper ring.
18. A body support structure according to claim 17 wherein the first upper and lower rings are vertically and non-rotatably moveable relative to each other.
19. A body support structure according to claim 18 wherein the first cable is coupled to the first upper ring, and a cable guide is coupled to the first lower ring.
20. A body support structure according to claim 19 wherein the first cable is coupled to the height adjustment device.
21. A body support structure according to claim 20 wherein the first cable is coupled to an axial bearing supporting the height adjustment device. Description
This application is a continuation of U.S. application Ser. No. 12/225,336, filed Sep. 18, 2008 now U.S. Pat. No. 7,857,390, which was the National Stage under 35 U.S.C. Section 371 of International Application No. PCT/IB2007/00734, filed Mar. 22, 2007, the entire disclosures of which are hereby incorporated herein by reference.
The invention relates to a piece of furniture, in particular a body support structure, including for example a piece of furniture for sitting on or a piece of furniture for lying on, such as, for example, chair, armchair, stool, bed or sofa.
The body support structure according to one aspect of the invention has a base, on which at least one seat is articulated, the seat comprising a seat part and a back part, an inclination of the seat about at least one axis of rotation being supported by at least one spring mechanism acting between the seat and the base, the spring mechanism comprising a lever arm and a support, the support being movable out of a position of rest along a curve into different working positions, the support assuming the position of rest when the seat is nonloaded, the support assuming one of the working positions as a function of a weight force with which a person sitting in an upright sitting posture loads the seat, the support being movable freely of a engaging force, which can be generated by the lever arm (51), between its position of rest and one of the working positions, as long as the person is sitting on the seat in the upright sitting posture, the support being engaged by the lever arm by means of the engaging force when the person reclines from his upright sitting posture against the back part into a rearwardly inclined sitting posture, a reaction force of the spring mechanism on the seat being adaptable to the respective weight force of the person by means of the working position of the support. A spring mechanism is thereby available, in which a fixing of the spring mechanism to a set value takes place only when the person reclines. The support and the lever lowerable onto the support thus come into contact with one another only when the person using the piece of furniture reclines and a supporting of the inclination movement is required. Such a low-friction setting of the spring mechanism allows an accurate setting of the spring mechanism, since, even then, an unbraked adjustment of the support under the lever is still possible when the person loads the seat with his entire weight. This ensures that the spring mechanism can reach, uninfluenced, the set value which corresponds to the weight of the person. Furthermore, as soon as the person sits upright, the spring mechanism can set itself to a change in the load. This makes it possible, for example, to vary the set value when the person grasps heavy files. By the set value being readjusted in this way, in particular, accidents can be prevented, since increased loading which takes place in the upright sitting posture always gives rise to a tauter supporting of an inclination movement by means of the spring mechanism.
In one aspect, the invention provides for designing the lever arm as a spring element and, in particular, as a leaf spring. A version of this type makes it possible to have a slender form of construction and to generate high spring forces.
In one aspect, the invention provides for absorbing a torque which is generated about the axis of rotation of the seat by the person sitting in the upright sitting posture on the seat by means of a prestress of the spring element. The unbraked movability of the support can thereby be ensured without additional outlay, even in the case of furniture designs in which the axis of rotation about which the seat is inclined does not lie directly below the center of gravity of a person sitting upright.
In one aspect, the invention also provides for absorbing the abovementioned torque by means of a temporary blocking of the rotational movement of the seat about the axis of rotation. By means of a design of this type, particularly high torques can be absorbed at low outlay. For this purpose, the invention provides, in particular, a blocking mechanism which comprises, in particular, a toggle lever which bears under prestress against an abutment, the prestress being capable of being generated by a spring element.
Furthermore, in one aspect, the invention provides for moving the support by means of an operating element. In particular, a handwheel with a weight scale is provided as operating element. A positioning of the support by means of a handwheel is suitable particularly for pieces of furniture which are regularly used by only one person.
According to one aspect of the invention, the base comprises at least one lower part, one middle part and one upper part, the seat being articulated on the upper part, the upper part being guided upward or downward on the middle part, the upper part being supported on the middle part by at least one weighing mechanism, the upper part moving with respect to the middle part, during a first loading of the seat with the first weight force, out of a first position into a second position, counter to a restoring force of the weighing mechanism, with a first weighing movement over a first weighing distance, the upper part moving with respect to the middle part, during a second loading of the seat with the second weight force, out of the first position into a third position, counter to the restoring force of the weighing mechanism, with a second weighing movement over a second weighing distance, this weighing movement of the upper part over the weighing distance being convertible into a traveling movement of the support of the spring mechanism by means of at least one movement converter. A piece of furniture can thereby be implemented which is set automatically to persons of different weight. Due to this automatic self-setting of the piece of furniture, even high loads which may occur in various components if supporting is incorrectly set are avoided. The individual components can thus have comparatively light and therefore cost-effective dimensioning. Due to the sole articulation of the seat on the upper part and to the supporting of the upper part on the middle part by the second spring element, the weight force can be detected, irrespective of whether it acts on a seat part and/or a back part and/or armrests of the seat. Furthermore, by an inclination movement of the seat being supported by the first spring element and by the spring force of the first spring element being set as a function of the weight force, this ensures a reaction of the seat which is oriented in terms of the weight force which exerts load on the entire seat. The essence of the invention, therefore, is the use of a first spring element for supporting the inclination movement of the seat, the use of a second spring element for detecting the weight force acting on the entire seat and, finally, the variation in the spring force of the first spring element as a function of the weighing distance which brings about the weight force against the second spring element. In one embodiment, the weight-dependent variation in the spring force of the first spring element is brought about by a displaceable support which can be adjusted contactlessly and therefore very smoothly and quickly as a function of the weight of the user, as long as the user does not recline in the seat. Due to the smooth movement of the spring mechanism, even the weight of a light person who sits down slowly and gently can be detected correctly. The weight of a heavy person who lets himself fall into the seat can likewise be detected correctly. The movement converter operates as a link between the weighing mechanism and the spring mechanism.
In one aspect, the invention provides a mechanical and/or electrical and/or electronic and/or pneumatic and/or hydraulic movement converter between the weighing mechanism (WM) and the spring mechanism. This also makes it possible to produce pieces of furniture for special applications, for example for vehicles.
In one aspect, the invention provides, furthermore, for using the middle part and the upper part as components of the movement converter. The movement converter can thereby be constructed cost-effectively with few components.
Furthermore, in one aspect, the invention provides for guiding the support on the curve, the curve running, in the position of rest of the piece of furniture, at an approximately constant spacing with respect to the lever arm or to the leaf spring designed as a lever arm. Owing to the run of the curve, it is possible to take into account a lowering of the lever arm during the traveling movement of the support and therefore to prevent the lever from coming to lie prematurely on the support.
According to one aspect of the invention, there is also provision for detecting the weighing distance electrically or electronically. As a result of this, too, a continuous mechanical connection between the weighing mechanism and the spring mechanism may be dispensed with.
In one aspect, the invention provides for articulating the spring element of the spring mechanism on the upper part and for supporting the seat with respect to the upper part. An unfalsified detection of the loading of the seat between the upper part and the middle part is thereby possible.
Furthermore, in one aspect, the invention provides for arranging a height adjustment device between the lower part and the middle part. A conventional height adjustment device can thereby be used, since this is arranged independently of the spring mechanism, the weighing mechanism and the movement converter.
In one aspect, the invention provides solely a vertical component for each weighing movement. Particularly accurate weighing is thereby possible, since even the slightest falsifications are avoided.
In one aspect, the invention also provides for implementing the movement converter by a drive body guided movably on the upper part, with a slot, and a pin which is arranged on the middle part and which is guided in or on the slot. It is thereby possible to implement a mechanically smoothly and accurately operating movement conversion in which, for example, a rotational movement is generated and is converted into a sliding movement.
In one aspect, the invention provides for arranging the weighing mechanism centrically with respect to a vertically standing axis of rotation of the piece of furniture. The weighing mechanism can thereby be installed in a space-saving way particularly in swivel chairs.
In particular, in one aspect the invention provides for forming the weighing mechanism by the height adjustment device. A particularly space-saving and cost-effective design is thereby possible, since some components fulfill functions of the height adjustment device and functions of the weighing mechanism.
In one aspect, the invention provides a height adjustment device which comprises a settable spring, an axial bearing and the spring element, the settable spring comprising a pressure tube and a piston rod movable in the latter. In a height adjustment device of this type, the spring element may also assume the function of the spring element of a weighing mechanism.
In one aspect, the invention provides for arranging between the axial bearing and the spring element an adaptor which is designed, in particular, as a cup. A compact design is thereby possible, the cup, together with its slits, serving as a device for fastening at least one movement converter.
The invention provides, in one particular embodiment, a movement converter which comprises at least one Bowden cable and at least one lever mechanism. Owing to a movement converter constructed in this way, a cost-effective and flexible connection between the weighing mechanism and the movement converter is possible.
Furthermore, in one aspect, the invention provides for supplementing the movement converter by a coupling which is arranged on the pressure tube of the settable spring, the coupling comprising a lower ring, an upper ring and an inner ring. The movement converter can thereby be decoupled in a simple way from a rotational movement of the seat about the vertical axis of rotation.
In one aspect, the invention also provides a seat having at least two carriers. As a result, seats of different width can be produced by means of the same components.
Furthermore, in one aspect, the invention provides for equipping each carrier of the seat with a specific spring mechanism, the latter being connected to a specific weighing mechanism via a specific movement converter. As a result, each carrier of the seat can be supported against an inclination movement about its horizontal axis of rotation in accordance with its individual load.
In one aspect, the invention also provides for designing the carriers with an upper leg and a lower leg, the carriers in each case being supported with their upper leg on a spring element of the respective spring mechanism. A space-saving arrangement of the spring mechanism between the legs is thereby possible.
In one aspect, the invention provides, furthermore, for connecting the legs of the carrier to one another by means of spokes. Forces can thereby be transmitted between the legs of a carrier in a directed manner, in order to determine desirably the bending behavior of the carrier.
The movement converter 41, the weighing mechanism WM and the spring mechanism are illustrated in three positions I, II and III. In position I, shown by thick unbroken lines, the arrangement is nonloaded. The arrangement is therefore not loaded by a person sitting on the seat, not illustrated. When the arrangement is loaded via the seat, not illustrated, with a first weight force 40 of a first person, the upper part 6 is lowered counter to a second spring element 37 in the direction of an arrow y′ downward toward a middle part 5 into the second position II. The second position II is illustrated by thin unbroken lines. Lowering takes place according to the articulation of the upper part 6 on the middle part 5 via two parallel arms 31 and 32 on a circular path 42.
FIG. 7 c illustrates the piece of furniture 1 without the cloth covering and without the height adjustment device and the base, once again in the nonloaded position I. It can be seen in this view that the upper parts 6 a, 6 b of the piece of furniture 1 are not connected to one another directly. In the exemplary embodiment illustrated, the carriers 77, 78, too, are connected to one another only by means of the cloth covering, not illustrated. According to design variants indicated by broken lines, the upper parts 6 a, 6 b and/or the carriers 77, 78 are connected by means of at least one flexible or rigid crossmember 81 or 82. Alternatively or additionally to this, there is also provision for connecting the upper part 6 a and the carrier 78 and/or the upper part 6 b and the carrier 79 via at least one diagonal crossmember. The upper legs 77 a and 78 a of the two carriers 77 and 78 are supported in each case with projections 22 a and 22 b on spring elements 20 a, 20 b of the two spring mechanisms SM, the spring elements 20 a, 20 b being designed as leaf springs 21 a and 21 b. FIG. 7 d illustrates a sectional view, from a direction IXd shown in FIG. 7 a, of the movement converter 41 a formed between the middle part 5 a and the upper part 6 a, the piece of furniture 1 also standing in the nonloaded position I here. The middle part 5 is carried by the carrying arm 76 a belonging to the lower part 4 and is screwed to said carrying arm via screws 83 a, 83 b. The upper part 6 a is articulated movably upward and downward on the middle part 5 a via the parallel arms 31 a, 32 a which are mounted rotatably with axes of rotation 33 to 36 on the upper part 6 a and the middle part 5 a respectively. The seat 7 is articulated rotatably on the upper part 6 a via two axes of rotation 16 and 84. The seat 7 is articulated at the axis of rotation 16 via the upper leg 77 a of the carrier 77 and at the axis of rotation 84 via the lower leg 77 b of the carrier 77. Furthermore, the first spring element 20 a is tension-mounted with a tension end 24 a into the upper part 6 a. The upper leg 77 a of the right carrier 77 of the seat 7 bears with the projection 22 a against a free end 23 a of the leaf spring 21 a. The seat 7 or the right carrier 77 is thereby supported on the first spring element 20 a in a direction of rotation w. The leaf spring 21 a is not only tension-mounted into the upper part 6 a, but is supported in a middle region 85 against the upper part 6 a by a support 25 a when a person sitting on the seat reclines. In the nonloaded position I shown in FIG. 7 d, there is an interspace 95 between the support 25 a and the leaf spring 21 a, and therefore these two components have no operative connection, so as not to brake a displacement of the support 25 a taking place during a loading of the seat 7. This interspace 95 is achieved by means of a corresponding prestress or orientation and/or a corresponding shaping of the leaf spring 21 a. The leaf spring 21 a and the support 25 a form a spring mechanism SM. The support 25 a is arranged on a toothed slide 86 which is guided laterally displaceably in a guide 28 a on the upper part 6 a and forms an output body 86 a. The toothed slide 86, or linear/curvilinear rack or gear, cooperates with a toothed quadrant 87, or rotary gear, which is fastened to the upper part 6 a rotatably about an axis of rotation 88 and forms a drive body 87 a. The toothed quadrant 87 has a slotted guide which is designed as a long hole 89. A pin 90 which is fastened to the middle part 5 a engages into the long hole 89. The upper part 6 a is guided on the arms 31 a, 32 a against a downwardly directed movement and is supported via a second spring element 37 a. The second spring element 37 a is designed as a leaf spring 91 a and is held with a tension end 92 a in the middle part 5 a. The upper part 6 a acts with a bolt 93 a on a free end 94 a of the leaf spring 91 a. The leaf spring 91 a and the arms 31 a, 32 a together form a weighing mechanism WM. A mechanical interlinking of the weighing mechanism WM and of the spring mechanism SM takes place by means of the movement converter 41 a. When the seat 7 is loaded with a weight force, the upper part 6 a, on which the seat 7 is supported, is supported on the second spring element 37 a and in this case is lowered slightly with respect to the position I shown in FIG. 7 d. Along with the upper part 6 a, the toothed quadrant 87 is also moved downward, and the pin 90 fastened rigidly to the middle part 5 a with respect to the upper part 6 a causes a rotation of the toothed quadrant 87 about its axis of rotation 88 in the direction of rotation w. The rotating toothed quadrant 87, during its rotational movement, takes up, or meshes with, the toothed slide 86 and the support 25 a fastened to the latter and transports or translates this support to the left in the direction of the free end 23 a of the leaf spring 21. A spacing F1 between the support 25 a and the projection 22 a is thereby reduced (see FIG. 7 d). This reduced spacing between the support 25 a and the projection 22 a then causes a greater supporting of the seat 7 against an inclination movement of the seat 7 about the axes of rotation 16, as compared with the position shown in FIG. 7 d, when the person sitting on the seat 7 reclines (see also FIG. 7 f). A left movement converter 41 b (see FIG. 7 c) is designed similarly to the right movement converter 41 a described above in detail. The piece of furniture 1 thus has a seat 7 which has two weighing mechanisms WM and two spring mechanisms SM which are connected in each case by means of a movement converter 41 a, 41 b. As a function of the position of a person sitting on the seat 7 of the piece of furniture 1, these two components are loaded proportionately with a weight force of the person and have corresponding reaction forces of the spring mechanisms SM against an inclination movement of the seat 7 directed in the direction of rotation w.
FIG. 7 e again depicts, in an enlarged illustration, the right movement converter 41 a shown in FIG. 7 d, with the associated weighing mechanism WM and the associated spring mechanism SM, in the nonloaded position I. An illustration of the seat 7 and of the lower part 4 has been dispensed with here. Reference is made to the description relating to FIG. 7 d. FIG. 7 f then shows a position II in which the seat 7, not illustrated, is loaded with a weight force of a person sitting upright. In comparison with FIG. 7 e, the rack 86 together with the support 25 a of the spring mechanism SM has been displaced in the direction of the free end 23 a of the leaf spring 21 a. This displacement movement over the displacement distance V1 is the result of a weighing movement of the upper part 6 a over a weighing distance W1, where, for example, W1=2.5×V1. A step-up of the weighing movement generated by the weighing mechanism WM thus takes place in the movement converter 41 a. That is to say, even with a small weighing movement, a sensitive setting of the spring mechanism SM can be carried out on account of the step-up. The setting of the spring mechanism SM and consequently the counterforce against an inclination movement of the seat about the axis of rotation 16 are generated as a function of the weight force with which a person acts on the seat. The counterforce is set by the variation in the spacing between the support 25 a and the projection, acting on the leaf spring 21 a, of the seat 7. In the loading situation illustrated in FIG. 7 f, too, there is still an interspace 96 between the support 25 a and the leaf spring 21 a, as long as the person sitting on the seat does not recline.
FIG. 9 b illustrates a view of a detail of the chair 3 shown in FIG. 9 a. The view of a detail shows a design variant in which the seat 7 and the upper part 6 are connected by means of a toggle lever 223. The toggle lever 223 serves for absorbing the torque M which the person sitting in an upright sitting position on the seat 7 generates about the axis of rotation 16. The above-described prestress of the leaf spring 21 may thereby be largely dispensed with. The toggle lever 223 comprises an upper lever 224, which is articulated rotatably on the seat 7, and a lower lever 225, which is articulated rotatably on the upper part 6. The upper lever 224 and the lower lever 225 are connected to one another by means of a joint 226. The joint 226 forms an axis of rotation 227. A spring element 228, which is designed as a spring 228 a, is connected to the joint 226 and draws the lower lever 224 of the toggle lever 223 against an abutment 229 which is fastened to the carrier 203. The toggle lever 223 is thereby brought into an approximately extended position. The abutment 229 is designed such that the levers 224 and 225 form with one another an angle α of about 175°. The toggle lever 223 consequently buckles only when the person reclines and therefore generates an increased torque about the axis of rotation 16. Owing to the choice of the angle α, at which the levers 224 and 225 stand in relation to one another, and/or to the choice of the spring force of the spring element 228 and/or to the arrangement of the toggle lever 223 between the seat 7 and the upper part 6, it is possible to adapt a blocking mechanism 230 to the special geometry of the chair 3. When the toggle lever 223 buckles as a result of loading, the leaf spring 21 assumes the support or supporting of the seat 7. At the point in time when the toggle lever 223 buckles in the direction of an arrow x, the support 25 has already been displaced in the direction of the arrow x′ by the person according to the loading of the seat 7.
1 Body support structure, piece of furniture
28, 28A Guide on 6 or 6 a 29 Lower end of 26 30 Inclined plane on 5 31 Arm between 5 and 6 31 a, 31 b Arm between 5 a and 6 a or 5 b and 6 b 32 Arm between 5 and 6 32 a, 32 b Arm between 5 a and 6 a or 5 b and 6 b 33, 34 Axis of rotation of 31, 31 a, 31 b 34 to 36 Axis of rotation of 32, 32 a, 32 b 37, 37 a Second spring element
259 Bolt on 239 260 a-260 d Position of 259 on 239 261 a Screw on 6 261 b Screw on 6 262 Cup in 5 263 Collar of 262 264 Bottom of 262 265 a Slit in 263 265 b Slit in 263 266 a Abutment in 5 266 b Abutment in 5 I Position of rest or position of 1 (nonloaded)
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