US3585658A - Folding sofa-bed with improved head section control linkage - Google Patents

Abstract

A FOLDING BED FRAME FOR SOFA-BEDS HAVING A PLURALITY OF FRAME SECTIONS, INCLUDING A FOOT SECTION KNEE SECTION, TRUNK SECTION AND HEAD SECTION PIVOTED IN END-TO-END RELATION AND BEING FOLDABLE BETWEEN AN EXTENDED BEDFORMING POSITION AND A RETRACTED SOFA SEAT-FORMING POSITION, INCLUDING SUPPORT AND GUIDING LINKAGE ASSEMBLIES FOR DETERMINING THE PATH OF MOVEMENT OF THE TRUNK SECTION, AND HEAD SECTION ACTUATING LINK MEANS CONNECTED BETWEEN ONE OF THE SUPPORT LINKAGE ASSEMBLIES AND THE HEAD SECTION OPERATIVE TO VARIABLY CONTROL THE SPEED AND AMPLITUDE OF SWINGING MOVEMENT OF THE HEAD SECTION WITHIN THE SPACE BEHIND THE SOFA BACK CENTER RAIL, IN A MANNER TO PERMIT UTILIZATION OF A HEAD SECTION HAVING GREATER LENGTH THAN IS POSSIBLE WITH CONVENTIONAL SOFA-BED STRUCTURES.

Description

M. P. SPITZ June 22, 1971 4 Sheets-Sheet 1 Filed April 21, 1969 .w n HMM/f v u m Q \mm, .C .H *LJLTMMWWMHWINMMHIL 1. 4 /Q /wwv a M Ww m Nm. E m@ a n /w Mmmwm mm S 11% Q Q L mwllv EN. R Q Q Tri :JN k n mm @QR w Q su /fL June 22, 1.971 M, P, splTz l 3,585,658

FOLDING SOFA-BED WITH IMPROVED HEAD SECTION CONTROL LINKAG Filed April 21, 1969 4 sheets-Sheet-rs June 22, 1971 M p SPH-Z v 3,585,658

FOLDING SOFA*BED WITH IMPROVILI) HHN) SECTION CONTROL LINKAGH Filed April 21, 1969 4 Sheets-Sheet 5 June 22, 1971 1.55pm l 3,585,658

FOLDLNG SOFA-BED WITH IMPROVED HEAD SECTION CONTROL LINKAGII.

Filed April 21, 1969 4 sheets-sheet 4 United States Patent O 3,585,658 FOLDING SOFA-BED WITH IMPROVED HEAD SECTION CONTROL LINKAGE Melvin P. Spitz, 619 N. Elm Drive, Beverly Hills, Calif. 90210 Filed Apr. 21, 1969, Ser. No. 817,730 Int. Cl. A47c 17/14 U.S. Cl. -13 12 Claims ABSTRACT OF THE DISCLOSURE A folding bed frame for sofa-beds having a plurality of frame sections, including a foot section, knee section, trunk section and head section pivoted in end-to-end relation `and being foldable between an extended bedforming position and a retracted sofa seat-forming position; including support and guiding linkage assemblies for determining the path of movement of the trunk section; and head section actuating link means connected between one of the support linkage assemblies and the head section operative to variably control the speed and amplitude of swinging movement of the head section within the space behind the sofa back center rail, in a manner to permit utilization of a head section having greater length than is possible with conventional sofa-bed structures.

BACKGROUND OF THE INVENTION The present invention relates generally to folding bed frame structures.

The type of sofa-bed construction with which the present invention is concerned comprises generally a plurality of bed frame sections which are pivotally connected in end-to-end relation and are supported and guided so as to permit the frame to be foldable between an extended bed-forming position and a retracted sofa seat-forming position. The bed frame structure is -accommodated in a sofa frame which essentially comprises a seat-forming area having a transversely extending front rail, and a back center rail behind which there is space to accommodate the head section, when the bed frame structure is in folded retracted position. More specifically, when the bed frame structure is folded, the frame sections enclose the mattress under a degree of compression and are generally disposed with a foot section ina plane slightly oi horizontal so as to provide the base for seat cushions thereon; a knee section disposed in a generally vertical position behind the upholstered front rail of the sofa frame; `a trunk section disposed generally horizontally along the base of the sofa frame; and a head section disposed generally vertically behind the back center rail near the back of the sofa frame.

The recent trend in bedding dimensions is towards increased overall bed length to provide a more comfortable sleeping surface, commensurate with the increased average height of adults. The conventional type of bed frame structure for sofa-beds is severely limited with respect to bed length for the reason that the bed frame sections must of necessity be folded within a sofa frame of relatively shallow depth. Prior efforts to increase the bed length have therefore required that the sofa frame be of greater depth in order to accommodate the lengthened bed sections during the articulation process and when in retracted folded position.

In the present invention, it is proposed to provide a sofa-bed construction which can be opened into a relatively longer bed, and yet close within the normal relatively shallow sofa frame dimensions. The extra bed length is obtained by making the head section longer than in present conventional structures, and by providing a con- ACC trol linkage to actuate the head section in a unique manner, the motive force for moving the head section being obtained from and in response to the movement of certain of the members constituting the supporting linkage assemblies for the trunk section of the bed frame structure.

While it has been generally known heretofore to provide operating link structures for the head section, 'which are connected between the head section and support linkage assemblies for the trunk section, for example as disclosed in U.S. Pat. No. 3,284,811, the objective and main purpose in such designs was to provide an operating structure to swing the bed frame over a xed front rail of the sofa frame. The patent discloses a linkage between front link means and the head section, which embodies a lost motion connection and does not operate to obtain the inherent advantageous results as embodied in applicants mechanism.

Applicant overcomes the inherently limited bed length of the prior art structures by the provision of head section actuating link means which are pivotally connected between the head section and a link member of the supporting link assemblage for the trunk section, the actuating link means being connected at a point having movement in a path and in a direction relative to the pivotal connection of the head section with the trunk section such that the speed of the swinging movement of the head section will be variably controlled at different portions of its movement. Thus, a lengthened head section m-ay be articulated within a relatively shallow sofa frame by providing the structure of the herein described invention, wherein the swinging process at the pivotal connection of the head section and the trunk section will be speeded up during the initial stages of movement of the head section underneath and behind the back center rail during the closing of the bed structure. This speeding up of the swinging process prevents the head section from protruding beyond the rear of the sofa frame. Subsequently as the head section is moved towards its final position behind the back center rail, the swinging movement of the head section is slowed down and diminished in such a manner that the head section will be finally disposed in a plane sloping rearward of Vertical, lying relatively close to the back of the so-fa frame. The space required behind the back center rail is thus minimized, so that the back center rail may be located relatively deeply within the sofa frame toward the rear of the frame, which permits advantageous loosepillow back furniture styling. The lengthened bed structure is simultaneously achieved with the added length of the head section, and additional lengthening of the foot section if desired, which is accommodated in the retracted position by virtue of the head section being disposed relatively farther from the front of the sof-a frame.

SUMMARY OF THE INVENTION The present invention relates generally to sofa-beds of the type having an articulated sectional bed frame movable to extended and retracted folded positions, and more particularly to an improved linkage for actuating and controlling swinging movements of the bed frame head section.

Among the various objects of the herein described invention, it is a general object to provide a sofa-bed construction which will have improved operating characteristics over existing conventional arrangements, and particularly which will permit the utilization of a longer head section than in conventional arrangements, and still permit articulate movement of the head section Within the contines of normal sofa frame dimensions.

It is a further object to provide improved actuating and control means for the head section of the foldable bed frame, which will permit the head section to be made longer than in conventional structures so as to close the undesirable and unsightly gap which normally exists between the end of the head section and the upholstered back of the sofa, when the bed frame is extended into open bed-position.

A further object is concerned with the provision of novel means for actuating and controlling the head section during its swinging movements in the area behind the back center rail of the sofa frame so as to permit a more complete utilization of such area and permit deepening of the sofa seat for advantageous loose-pillowback furniture styling.

Another object of the invention is to provide improved linkage operating means for controlling the swinging movements of the lengthened head section during folding and unfolding of the bed frame so that the swinging movement will be speeded up during the initial stages of folding in which the lengthened head section is moved underneath and behind the back center rail, and slowed down and diminished as the lengthened head section approaches its fully folded upright position adjacent the rear of the sofa frame. A positive control is provided during the folding and unfolding movements, and by coordinating the speed of movement of the lengthened head section about its pivotal axis, the lengthened head section will be prevented from protruding beyond the rear of the sofa frame during any portion of its travel.

Still another object is to provide in connection with the foregoing object, a unique camming action exerted upon the lengthened head section by the actuating means, which permits that various speeds and amplitude of movement of the swinging head section are accomplished at various portions of the swing, as desired.

A still further object is to provide an actuating connection with the lengthened head section, which can be varied according to a desired pattern, and wherein the connection to the lengthened head section will be spaced at variable distances from the axis of swinging movement of the lengthened head section at different positions of its travel to meet varied design objectives.

Further objects of the invention will be brought out in the following part of the specication, wherein detailed description is for the purpose of fully disclosing the invention without placing limitations thereon.

BRIEF DESCRIPTION OF THE DRAWINGS Referring to the accompanying drawings, which are for illustrative purposes only:

FIG. 1 is a side elevational view of a sofa-bed construction having a bed frame operatively controlled in accordance with the features of the present invention;

FIG. 2 is a fragmentary top plan View of the linkage assemblies and associated link means for controlling the trunk section and lengthened head section during articulated movements to a bed-forming position and a retracted seat-forming position;

FIG. 3 is an end view showing the frame in a partially folded position, with the lengthened head section substantially at an initial entering position into the space behind the back rail;

FIG. 4 --is a similar view with the bed frame moved to a further retracted position;

FIG. 5 is a similar view with the bed frame in fully retracted seat-forming position, and with the lengthened head section extending upright in the space behind the sofa back center rail;

FIG. 6 is an enlarged fragmentary View of the actuating means of the head section included in the structure of FIG. 1, with the head section being in a bed-forming extended position.

FIG. 7 is a similar view showing the head section in fully folded position.

FIG. 8 is an enlarged fragmentary View diagrammatically illustrating a modied construction of the head section actuating means, the head section being in a bedforming extended position; and

FIG. 9 is a similar View showing the head section in fully folded position.

DESCRIPTION OF THE DISCLOSED EMBODIMENTS Referring more specifically to the drawings, the sofabed structure embodying the features of the present invention is shown in FIG. 1 as being mounted in a conventional upholstered sofa structure as generally ndicated in phantom lines at A. The sofa structure, which forms no part of the present invention, usually comprises opposite end portions that are associated with a fixed wooden frame structure which includes a front upstanding rail member 10 and a rearwardly spaced back center rail member 11 below and back of which certain parts of the articulated bed frame structure must be moved, when the bed frame is folded to a seat-forming position. The back center rail member is forwardly spaced with respect to a back wall 12 of the sofa structure and cooperates therewith to form a behind-the-back-rail space as generally indicated at 13 and into which certain parts of the bed frame structure will be received, when in fully folded seat-forming position, as will hereinafter be further explained.

The folding sofa-bed tframe structure of the present invention includes on each side, a xed stationary frame structure in which a main horizontal frame member 14 is xedly secured in any desired manner to the adjacent frame structure of the sofa. The member 14 together with a lixedly secured upstanding bracket 15 thereon constitute a supporting base structure for linkage assemblies for interconnecting the bed frame structure with the sofa and guiding the movements of certain portions thereof during folding and unfolding operations of the bed frame structure.

The :bed frame structure comprises a plurality of generally rectangular folding sections identified by their side rails, namely, as a foot section 16, knee section 17, trunk section 18 and head section 19. These sections are connected in end-to-end articulated relation by joint pivots as indicated at 20, 21, and 22 respectively. The side rails of the sections and the operative linkage mechanisms are the same and duplicated on opposite sides of the bed frame structure. In the following description, reference will be made to only one side.

The actuating mechanism for the foot and knee sections, as well as the supporting legs is conventional and includes a bell crank 23 which is rotatably supported at its elbow on the trunk section 18 by a fulcrum pin 24. One end of an actuating link 25 is connected at 26 to arm 27 of the bell crank, the other end of the link 25 being pivoted at 28 to a folding leg 29 having its inner end hingedly supported on the trunk section 18.

A second bell crank 30 is fulcrumed on the joint pivot 21 at the connected ends of the knee section and the trunk section. One end of an anchor link 31 is pivoted at 32 to the upper arm 33 of the bell crank 30. The other end of link 31 is pivoted at 34 to the side rail of the foot section 16 spaced from the joint pivot 20. The other arm 35 of bell crank 30 is formed with an elongate slot 36 to slidably receive a connection pin 37 at one end of a link 38, the other end of this link being provided with a longitudinal slot 39 for slidably receiving connection pin 40 carried :by the arm 27 of bell crank 23.

The ifoot section of the bed frame is supported in its extended position upon an end leg 41 which is pivoted inwardly of its upper end at 42 to the foot section, and an actuating link 43 has one end pivoted at 44 to the upper end of leg 41, and its other end pivoted at 45 on the knee section 17 spaced from the joint pivot connection 20.

The bell cranks 23 and 30 together with their associated connecting linkages and other linkages as thus far described, are conventionally known arrangements for controlling the movements of the foot and knee sections, and to fold the legs 29 and 41 during folding and unfolding movements of these sections by an operator lirst grasping a cross bar 46 at the outermost end of the foot section to [fold the foot and knee sections into their retracted positions, simultaneously folding the leg 41; then grasping a cross bar (not shown) transversely connected to the knee section side rails at either side and lifting and closing the bed structure into the sofa frame, simultaneously causing leg 29 to fold into retracted position as the bell crank 23 rotates about fulcrum pin 24.

As shown in FIG. 5, when the bed frame structure is completely folded into a seat-forming position, the foot section 16 becomes the seat base upon which the seat cushions of the sofa are placed. The knee section 17 is substantially vertically positioned closely behind the sofa front rail 10, and the trunk section 18 is positioned generally horizontally along the bottom of the sofa below the foot section with which it cooperates to hold the folded mattress therebetween. The head section 19 in the completely folded position of the bed frame extends substantially vertically adjacent the back wall 12 within the space 13 behind the back center rail member 11.

From a consideration of the relative positions of the bed sections, and in particular the position occupied by the head section it will become evident immediately that if an attempt is made to extend the length of the head section, in order to obtain a longer bed, and if standard sofa dimensions are to be utilized, control means other than conventionally available means must be provided in order to control the movements of the head section if it is to remain within the contines of the sofa structure while being moved between a seat-forming position and a bed-forming position. The mechanism for positively guiding and controlling the swinging movements of a lengthened head section comprises a main feature of the present invention, and will now be more fully explained in detail.

In the present invention, it is proposed to utilize two conventional cooperatively associated linkage systems which are shown in FIG. 1 as comprising rear support linkage means B and front support linkage means C, these two systems being intercoupled and cooperatively connected with the trunk section so as to direct and guide its movements during folding and unfolding operations of the bed frame,

The rear support linkage means B is shown as comprising a rear hanger link 47 which has one end connected at a fixed pivot point 48 at the upper end of the bracket 15. The other end of the hanger link is pivoted at 49 t0 one end of a rear support link 50, this link having its other end pivotally connected with the joint pivot 22 connecting the trunk section and head section.

The front support linkage means is shown as comprising a main front anchor link 51 which is connected at its lowermost end to a front fixed pivot point 52 toward the forward end of the horizontal frame member 14, the outer end of the anchor link being pivoted at 53 adjacent and inwardly positioned with respect to one end of a link 54 which is pivoted between its ends at a pivot point 55 to the rear support link 50 for a relative swinging movement. The other end of the link 54 is pivotally connected with a second link 56 by a pivot connection 57. At its other end, the link 56 is connected by a pivot 58 which is inwardly spaced from the pivot 49 at the outermost end of the rear hanger link 47. The end of link 54 which extends beyond the pivoted connection 53 is connected by a pivot 59 with the outermost end of the other arm as indicated at 60 of the bell crank 23. The connected end portion of the link 54 and the arm 60 of the bell crank 23 thus become operative elements of the front support linkage means, and the interconnected links 54 and 56 cooperate to form coordinating connecting means between the rear support linkage means B and the front support linkage means C, and determine the path of movement of the trunk frame section during folding and unfolding operations thereof. It will be observed that vw'th the described arrangement, the front support linkage means C is connected at the fulcrum pin 24 with the trunk section at a point forwardly positioned with respect to the pivotal joint 22 at which the rear support linkage means B connects lwith the trunk section.

As further shown in FIG. l, the pivoted inner end of the front anchor link 51 is provided with an angularly projecting arm 61 which is connected to one end of a tension spring 62, the other end of this spring being anchored to the horizontal frame member 14 at a point 63 thereon by means of an appropriate attaching lug 64 as shown in FIG. 2. This spring operates in a manner well known in this type of bed construction and is provided to assist the operator in moving the bed frame from the folded seatforming position to the extended bed-forming position.

As thus far described, it will be appreciated that the head section 19 is free to move about its pivotal connection 22 with the trunk section 18 and that it becomes necessary to create swinging movements of the head section in coordination with the movements of the trunk section as determined by the front support linkage means and rear support linkage means systems. For such purpose, the present invention includes a unique head section actuating means as generally indicated at D in FIG, l, and diagrammatically illustrated in FIGS. 6 and 7, which will now be described in detail.

It will be appreciated that in order to permit a head section of increased length to articulate within the space 13 behind the back center rail 11 of a relatively shallow sofa frame structure, it will be necessary to swing the head section about its pivotal axis of connection with the trunk section at a varied speed of movement during changes of its position at it enters and leaves the space 13, and as it reaches and leaves its final folded position. More specifically, it is an important feature of the present invention to provide head section actuating means which will function to speed up the swinging movement of the head section during the initial stages of its entering and linal stages of its leaving the space 13 so as to prevent the head section from protruding beyond the rear or back wall 12 of the sofa frame during any portion of travel through its arc of movement. Subsequently, during the folding process for example, the swinging movement of the head section must be slowed down and diminished as it approaches a vertical position at the end of its movement in the space 13, in order that the head section will lie relatively close to the back of the sofa frame, thus utilizing to the best advantage the available space above and behind the back center rail 11 to accommodate the added length of the head section and adjacent portion of the mattress.

In accomplishing this feature, the main front anchor link 51 is utilized as a power source in a unique manner for motivating the head section actuating means D, which is connected between the head section and a point on the anchor link 51 having movement in a path and in a direction relative to the pivotal connection between the head section with the trunk section such that the speed of the swinging movement of the head section will be variably controlled at different portions thereof as the head section is moved into and out of the space 13 behind the back rail member. As exemplary of head section actuating means for accomplishing this purpose, there is shown in FIG. l a rocker arm 65 which is pivoted between its ends by a pivot 66 upon the link 54 between the pivots 53 and 55. The lowermost end of this rocker arm, as viewed in FIG. l, is connected by a pivot 67 to one end of a link 68, the other end of this link being connected by a pivot 69 adjacent the outermost end of the front anchor link 51. The uppermost end of the rocker arm 65 is connected by a pivot 70 to one end of a connecting link 71 which has its other end pivotally connected by a pivot 72 with the head section at a point spaced from its joint connection with the trunk section. With the linkage assembly just described for the actuating means of the head section, it will be evident that movements of a point such as 69 on the anchor link 51 which are transmitted to the head section will be applied in reversed direction to the required movement of the head section, and in proportionally decreased amplitude. It will `be appreciated, however, that a proper direction of movement might also be obtained by extending the outer end of the anchor link beyond the pivot 53, and connecting this projecting end by a single link to the head section. The head section actuating means D as thus described will also impart the necessary variable swinging movement to control the lengthened head section in the manner previously described for utilizing the space 13 most efficiently.

Referring now to FIGS. 8 and 9, there is shown a modified embodiment of the head section actuating means, wherein the parts are illustrated diagrammatically, and corresponding numerals have been applied to such parts as are similar to those previously described. Briefly, the modified embodiment differs primarily in that the rocker arm 65 is now modified to provide an angle link 65a, and that the pivotal connection with the head section 19 provides a camming action. Such camming action may be accomplished in a variety of ways. In one such embodiment as disclosed, the camming action is accomplished by providing a pin 73 at the end of the roc-ker arm 65a which is connected to the head section, this pin being positioned moveably within a slot 74 in the side rail of the head section 19. By varying the configuration of the slot and its angular disposition, the required camming action is provided which varies the speed and amplitude of the swinging movement of the head section about the pivotal joint 22. It will be observed by comparing the positions of the pin 73 in FIG. 8 lwith the position of this pin in FIG. 9 that its distance with respect to the pivotal connection 22 is greater when the head section and trunk section are substantially coplanar, than when the head section is positioned at an angle to the trunk section as shown in FIG. 9. Although a cammi-ng action is obtained in this modified form of the invention, the modified form basically operates in the same manner as the form described previously and provides a direct push and pull positive operating actuation of the head section without the disadvantages of lost motion as envisioned by known prior art structures as previously mentioned.

From the foregoing descriptions and dra-Wings, it will be clearly evident that the delineated objects and features of the invention will be accomplished.

Various modifications may suggest themselves to those skilled in the art without departing from the spirit of my invention, and, hence, I do not wish to be restricted to the specific forms shown and uses mentioned.

I claim:

1. In a folding sofa-bed construction including a bed frame having a plurality of frame sections, one of which is an inner head section, and another an adjacent trunk section said sections being pivotally interconnected in endto-end relation for selective unfolding movement to an extended coplanar bed-forming position and folding movement to a folded retracted sofa seat-forming position in which the trunk section is disposed generally horizontally along the base of the sofa frame and the head section extends generally upright in a space at the rear of the sofa seat behind the back center rail, mechanism for supporting and controlling the movements of said frame sections during movement of the bed frame to said extended and retracted positions, comprising:

(a) a stationary frame;

(b) rear support linkage means pivotally connected between a rear fixed pivot point on said sationary frame and a rear portion of said trunk section;

(c) front support linkage means pivotally connected between a front fixed pivot point on said stationary frame and said trunk section forwardly of the connection to said rear support linkage means, said 8 front linkage means including an anchor link having a pivotal connection at its outer end and being pivoted at its inner end at said front fixed pivot point;

(d) connecting means between said front support linkage means and said rear support linkage means for coordinating the movements of both support linkage means in determining the path of movement of the trunk section; and

(e) head section actuating link means including a plurality of link members pivotally connected in endto-end relation -between said anchor link and a connection point on said head section spaced from the pivot connection for pivotally swinging the head section relative to the trunk section, the connection with the anchor link being at a point on the link adjacent its outer end pivotal connection, whereby said point kwill move in a path and in a direction relative to the pivotal connection of the head section with the trunk section such that the speed and amplitude of the swinging movement of the head section will be variably controlled at different portions thereof.

2. A folding sofa-bed construction according to claim 1, wherein the speed of swinging movement of the head section is increased as it initially enters and finally leaves the space ibehind the back center rail, and is decreased and diminished as it approaches and leaves the generally upright position therebehind.

3. A folding sofa-bed construction according to claim 1, kwherein said coordinating connecting means is pivotally connected with the anchor link closely adjacent to said point of` pivotal connection of the head section actuating link means.

4. A folding sofa-bed construction according to claim 3, wherein said point is between the pivot connection of the coordinating connecting means and the inner end pivot of the anchor link.

5. A folding sofa-bed construction according to claim 1, wherein the head section actuating link means has a camming con-nection with said head section.

6. In a folding sofa-bed construction including a bed frame having a plurality of frame sections, one of which is an inner head section, and another an adjacent trunk section said sections being pivotally interconnected in endto-end relation for selective unfolding movement to an extended coplanar bed-forming position and folding movement to a folded retracted sofa seat-forming position in which the trunk section is disposed generally horizontally along the base of the sofa frame and the head section exd tends generally upright in a space at the rear of the sofa seat behind the back center rail, mechanism for supporting and controlling the movements of said frame sections during movement of the hed frame to said extended and retracted positions, comprising:

(a) a stationary frame;

(b) rear support linkage means pivotally connected between a rear fixed pivot point on said stationary frame and a rear portion of said trunk section;

(c) front support linkage means pivotally connected between a front xed pivot point on said stationary frame and said trunk section forwardly of the connection to said rear support linkage means, said front linkage means including an anchor link pivoted at its inner end at said front fixed pivot point;

(d) connecting means between said front support linkage means and said rear support linkage means for coordinating the movements of both support linkage means in determining the path of movement of the trunk section, including a link member having a pivotal connection with the anchor link; and

(e) head section actuating link means pivotally connected between said anchor link and said head section for pivotally swinging the head section relative to the trunk section, including a rocker link pivoted between its ends on said link member of the connecting means in spaced relation to its pivot connection with said anchor link, the actuating link means connection with the anchor link being at a point having movement in a path and in a direction relative to the -pivotal connection of the head section with the trunk section such that the speed and amplitude of the swinging movement of the head section will be variably controlled at different portions thereof.

7. A folding sofa-bed construction according to claim 6, wherein one end of the rocker link is coupled -with the anchor link and its other end is coupled with the head section.

8. A folding sofa-bed construction according to claim 6, wherein the rocker link is an angle link having one end thereof connected by a separate link pivoted at said point on said anchor link, and the other end of the rocker link having a camming connection with said head section.

9. A folding sofa-bed construction according to claim 6, wherein the rocker link has a cam actuating connection at one end with said head section.

10. A folding sofa-bed construction according to claim 1l. A folding sofa-bed construction according to claim 10 wherein the pin is carried by said rocker link and the slot is on said head section.

12. A folding sofa-bed construction according to claim 2 wherein the head section actuating link means has a connection with said head section which varies in its spaced relation to the pivotal axis of said head section during movements of the bed frame between said extended and retracted positions.

References Cited UNITED STATES PATENTS 3,284,814 11/1966 Mikos 5-13 3,298,041 1/1967 Rogers, Jr. 5-13 3,300,792 l/1967 Spitz 5-13 3,416,168 12/1968 Pokorny, lr. 5-13 3,503,081 3/1970 Mickos 5-13 20 CASMIR A. NUNBERG, Primary Examiner U.S. Cl. X.R. 5-29

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