MXPA97000012A - Bed that has a support surface quecomprende sections that can be recruited pormedio of a semiautomatic mechanism manualmenteoper - Google Patents

Abstract

The present invention relates to a bed comprising a support frame, composed of supports connected by longitudinal tubular members and transverse members, a support surface for the mattress, the support surface is composed of a plurality of cross sections articulated between them and to the support frame, in such a way that it can be reclinable to a plurality of included positions between two limit positions corresponding to a horizontal coplanar position and a sinuous sitting position, characterized in that position adjustment means are provided, which are slidably housed in the longitudinal tubular members of the frame and move, against the action of the elastic return means, towards a plurality of positions included between the two limit positions defined by the first guide and stop means and corresponding respectively to the coplanar position horizontal and to the sinuous sitting position of the cross sections of the support surface, retaining means are provided which are continuously pushed by the elastic means, which can be deactivated manually by the user, to engage in stop seats provided on the regulating means and to block the sliding of the latter both at the limit positions and at a plurality of positions, which are intermediate with respect thereto, at least the cross sections of the support surface, which respectively support the The cervical, dorsal and femoral parts of the user's body are articulated to the regulating means with the help of oscillating connecting means, which move towards a plurality of positions included between the two limit positions and corresponding respectively to the coplanar position. and to the sinuous sitting position of the transverse sections of the support surface, the cross sections of the support surface, which respectively support the cervical, dorsal, lumbar, femoral and limb and foot sections of the user's body, are articulated to the support frame with the help of the oscillating guide and stop means, which move towards a plurality of positions included between the two limit positions defined by the second guide and stop means and corresponding respectively to the horizontal coplanar position and to the sinuous seated position of the transverse sections of the support surface, the cross section of the support surface, which supports the sacrum part of the user's body, is suspended relative to the bed support frame on the axes, transversally, of articulation of the the adjacent transverse sections, for the lumbar and femoral support, are manually deactivated the means of retention of the medi The regulation and the cervical cross section, the dorsal cross section and the femoral cross section, which are connected thereto, move towards a plurality of positions included between their limit position by the resulting force system consisting of the action of the elastic return means, of the regulation means and the load, to which the user can variably distribute on the cross sections of the support surface, which are articulated to the regulating means

Description

BED THAT HAS A SUPPORT SURFACE THAT COMPRISES SECTIONS OR THAT CAN BE RECLINED THROUGH A MANUALLY OPERATED SEMIAUTOMATIC MECHANISM DESCRIPTION OF THE INVENTION The present invention relates to a bed, in which the mattress support surface is composed of a plurality of cross sections hinged between them and reclinable at a plurality of positions, from the horizontal position to a sinuous sitting or meridian position, by means of a manually operated semiautomatic mechanism. It is known that there are several types of beds, which have a mattress support surface, which can be articulated in three or more cross sections. These cross sections can be varied reclined by means of manual or electrical mechanisms, in order to ensure the maximum comfort of the occupant of the bed to sleep and also to read, write or watch television. In addition, beds composed of reclining sections are also the most suitable to correctly solve position problems for people confined to bed for health reasons.

The demand for an increase in comfort has led to the provision of an increasingly large number of articulated sections, each of which is associated with an electromechanical control device, which can be operated by means of a button connected to the structure of the bed, or by means of remote controls. On the one hand, these electromechanical control devices can only be used in rooms provided with a supply of electricity, and in any case can not be used if the power supply fails. Furthermore, the manufacturing cost of these electrically controlled beds is substantially increased by the fact that the number of electromechanical control devices provided corresponds to the number of articulated sections to be operated. It should be noted that operating costs are also substantially increased by periodic service operations, which require these electromechanical devices and the necessary repair of damage, which can occur with all electrically operated items. For the above reasons, the main object of the invention is to provide a bed having a support surface composed of reclining sections, which offers the same facilities as electrically controlled beds without requiring the use of electromechanical control means. Another object of the invention is to provide a bed of the type described, which has characteristics such as to avoid the limitations and disadvantages of electrically controlled beds and expand the utilization capacity of this type of bed comprising articulated sections, thus reducing both the cost of manufacturing as operating costs. These and other objects are achieved according to the invention with a bed having a support surface composed of reclining surfaces, which have the features claimed below. The objects, features and advantages of the bed according to the invention will be more apparent from the following description given with reference to the accompanying diagrammatic drawings, in which: Figure 1 shows a side view of the bed according to the invention in the horizontal coplanar position, - Figure 2 shows the bed according to the invention in a slightly sinuous position; Figure 3 is a side view of the bed in a moderately sinuous position; Figure 4 shows, as in a side view, the bed according to the invention is in a sinuous sitting position; Figures 5 and 6 show two enlarged details of Figure 1; Figures 7 and 8 show two enlarged details of Figure 2; Figures 9 and 10 show two enlarged details of Figure 3; Figures 11 and 12 show two enlarged details of Figure 4. With reference to Figures 1, 2, 3 and 4, the bed 20 is essentially composed of a frame 21, which bears the surface of the support 22 of the mattress 23. The frame 21 is made of steel pipe having a hollow quadrangular section and comprises 4 vertical supports or ends 24 connected by 2 longitudinal members 25, which extend along the sides of the bed 20, and two transverse members 26 respectively positioned to correspond to the head and the feet of the bed 20. The frame 21 of the bed carries a supporting surface 22 for the mattress 23, the supporting surface consists of a plurality of transverse supports articulated between them, and to the frame 21, such that it can be reclinable to a plurality of positions included between a horizontal coplanar position (Figure 1) and a sinuous sitting position (Figure 4). Starting from the head of the bed 20, a section supporting the cervical head and lordosis is provided, which in the remainder of the description will be referred to as the cervical section 27, a dorsal section 28 for supporting the dorsal kyphosis, a section lumbar 29 to support the lumbar lordosis, a section of sacrum 30 to support the sacrum portion, a femoral section 31 to support the femoral portion of the lower joints, and finally a section 32 to support the legs and feet of the occupant's body . In a manner known per se, each section is essentially composed of two longitudinal sides made of steel pipe having a hollow quadrangular section and interconnected by cross-members (not shown in the drawings). Each support section is hinged to the adjacent support section around the horizontal axes of rotation, extending transversely along the upper edges of the support sections, with the exception of the section 32 for the legs and feet and the femoral section 31, which are hinged along their lower edges.

The cervical section 27 and the dorsal section 28 are also interconnected by a device, known per se and not described, capable of allowing various tilting positions of the cervical section 27 relative to the dorsal section 28. Removably overlaid on the supporting surface 22 of the bed 20 is a mattress 23 constructed to follow the movements of the cross sections, on which it is supported. A regulating bar 34 is slidably disposed within each longitudinal member 25 of the frame 21 of the bed 20. The head end of the regulating bar 34 is connected to the end of a tension spring 35, which is disposed coaxially in the longitudinal member 25. The other end of the tension spring 35 is anchored, by means of fastening systems known per se, to that end of the longitudinal member 25, which is connected to the vertical end 24 at the head end of the frame 21 The front end, which faces the head of the bed 20 and the rear end facing the bottom of the bed 20, of each adjustment bar 34 are provided with respective pairs of transverse pins 36 and 37, which are project horizontally from the sides of the regulating bar 34. The pair of front pins 36 and the pair of rear pins 37 of the regulating bar 34 can slide in respective pairs s horizontal guiding and detent grooves 38 and 39, formed in the side walls of the longitudinal member 25. As can be seen in Figures 5, 7, 9, 11, arranged around the front transverse pins 36 of the bar adjustment 34, so that they can be free to rotate, there is both the lower end of a connecting rod 40 and the horizontal rotation arrow of a sliding roller 41, which is slidably disposed in the longitudinal member 25. The end The upper part of the connecting rod 40 is articulated to the back support section 28 and cooperates, in a manner known per se, with the device allowing several inclined positions of the cervical section 27 relative to the back section 28. Fixed on the upper side of each longitudinal member 25, in order to project vertically, not only is a trapezoidal tie 42, but also a triangular loop 43, which are respectively they are positioned to correspond to the guide and front and rear detent grooves 38, 39 for regulating the bar 34 in the longitudinal member 25. The trapezoidal loop 42 has a guide groove 44, which extends over the substantially arcuate path, (Figures 5, 7, 9, 11), and two transverse pins 45, 46, which are respectively secured to the upper lobe of the loop 42 and the lower side of the loop 42, for the reasons described below. The triangular loop 43 has a guide groove 47, which extends over the substantially sinuous path, over which a concave portion, which faces the foot of the bed 20, is followed by a convex portion facing the head of the bed. bed 20. Hinged at the top vertex of the triangular loop 43, so that it may be free to rotate about a horizontal axis, there is a connector arm 48, which has a substantially conical shape. The middle portion of the connector arm 48 has a rectilinear longitudinal slot 49. Shaped at the lower end of the conical arm 48 is an open slot 73, in which a transverse rear pin 37 of the regulating bar 34 slidably engages, the pin it is at the same time slidably guided in a rear horizontal groove 39 of the longitudinal member 25. Provided on the upper side of each longitudinal member 25, next to the trapezoidal tie 42, there is a retaining device for the adjustment rod 34 housed therein. longitudinal member 25 disposed behind the same. The retaining device essentially comprises a retainer 50, which is placed on each longitudinal member 25 to correspond to indentations 51, 52, 53, 54, formed on the surface of the regulating rod 34. A retainer end 50 is pivoted about a rotating shaft 55, which firmly connects the retainer 50 provided on the longitudinal members 25. The free end of each retainer 50 is provided with a hook 56, which, passing through an opening 57 formed in the upper side of the longitudinal member 25, can be engaged in the indentations 51, 52, 53, 54 of the regulating bar 34. The detents 50 are continuously pushed to turn toward the coupling position with the indentations 51, 52, 53, 54 of the regulating bar 34 by means of appropriate torsion springs ( not shown in the drawings). A vertical lever 58 is connected to the rotation arrow 55 of the detents 50 to allow the user to disconnect the detents 50 manually from the indentations 51, 52, 53, 54 of the regulating bar 34 against the action of the springs of torsion.

In Figures 5, 7, 9, 11, it can be seen that on the inside of the longitudinal sides of the dorsal section 28 two longitudinal sectional members are also fixed 59, which extend in a cantilever fashion towards the lumbar section 29. Anchored to each cantilever portion of the longitudinal sectional members 59 is a rectangular guide loop 60, provided with a guide slot 61 following an undulating path, in the which a long curved portion follows a shorter curved portion. Slidably engaged in the corrugation groove 61 is the transverse pin 45 secured to the upper lobe of the trapezoidal tie 42. Also hinged to each cantilever portion of the longitudinal section members 59, to rotate about a horizontal axis, is the upper end of a rectilinear connector arm 62. The lower end of the connector arm 62 is hinged, to rotate about a horizontal axis, towards the transverse pin 46 secured in the lower part of the trapezoidal tie 42. Slidablely connected to the dorsal section 28 there is also a elbow tie 63, whose curved end 64 extends longitudinally towards the lumbar section 29.

The curved end 64 of the elbow tie 63 is provided with a pin 65, which slidably engages in the arcuate slot 44 of the trapezoidal tie 42 in order to cooperate with the articulation device of the cervical section 27 relative to the back section 28. In a manner known per se, the elbow tie 63 is connected, by means of appropriate lever mechanisms (not shown), to the articulation device of the cervical section 27 for the purpose of varying the inclination of the latter on the variation of the inclination of the dorsal section 28. Fixed to the longitudinal sides of the femoral section 31 are two longitudinal plates 66, which extend approximately over half the longitudinal length of the femoral section 31 from the adjacent edge to the extremity section and standing 32. Articulated at the respective ends of each of the plates 66, for rotation about a horizontal axis, there are the upper end of a support 67, which separates vertically from the longitudinal member 25, and the upper end of a rectilinear connecting arm 68. The support leg 67 is fixed to the longitudinal member 25, while the lower end of the arm connector 68 is provided with a pivot pin 69, which is slidably engaged in both the sinuous groove 47 of the triangular loop 43 as in the rectilinear groove 49 of the conical connector arm 48. On the lower part of the longitudinal side 33 of the leg and end section 32 is fixed a longitudinal plate 70, which is provided with a longitudinal rectilinear groove. 71. Slidablely pivoted in the slot 71 is the upper end of a support 72, which extends vertically from the longitudinal member 25 in a position corresponding to the leg of the bed 20. In the horizontal position of the bed 20 ( Figure 1), the support sections 27, 28, 29, 30, 31, 32, are coplanar. The retaining stop 50 (Figure 5) engages in the first indentation 51 of the regulating bar 34 and holds the latter in the position of maximum displacement towards the leg of the bed 20, neutralizing the return action of the tension spring 35. The pairs of front and rear pins 36, 37 of the adjustment bars 34 are located at the respective stroke limiting ends of the respective front and rear guide, and having the slots 38, 39. The cervical section 27, is maintained in the horizontal position by the elbow tie 63, which slidable pin 65 is located at a stroke limiting end of the arcuate slot 44 in the trapezoidal tie 42. The dorsal section 28 is locked in the horizontal position by the bar 40 connecting it to the regulation bar 34 and by transverse pin 45 of the trapezoidal tie 42, which is now in a position corresponding to a stroke limiting end of the corrugation groove 61 of the rectangular loop 60. The femoral section 31 (Figure 6) is locked in the horizontal position both by the fixed pin of the holder 67 and by the pin 69 of the connector arm 68, which is now in a position corresponding to the end of the sinuous slot 47 in the triangular loop 43. The pin 69 is held in this position by the longitudinal slot 49 of the conical arm 48, which in turn, it is locked in the position by rear transverse pins 37 of the regulating bar 34, which are arranged in an open slot 73. The end and leg section 32 is locked in the horizontal position by the pin of the support 72. , lying at a stroke limiting end of the longitudinal groove 71 in the plate 70. Starting from the horizontal position illustrated in Figures 1, 5 and 6, the user can recline the bed 20 to a slightly sinuous position (Figures 2, 7 and 8) by performing the following operations: First, the user operates the lever 58 to uncouple the detent 50 from the first indentation 51 of the regulation bar 34. After this, the user moves the upper part of his body towards the sacrum section 30, or exerts pressure on the sacrum section 30, and releases on the lever 58. The adjustment rod 34, released from the retainer 50, moves towards the head of the bed 20, both through the return action of the tension spring 35 and through the load, which the user has transferred to the sacrum section 30. At the same time, the lever 58 is separated by its torsion spring to a position in which its hook 56 is brought into contact with the surface of the regulating bar 34 until it engages in the second indentation 52 and blocks the movement of the bar 34 (Figure 7). During the movement of the regulating bar 34, the connecting rod 40 follows the bar 34 and leads to a displacement of the dorsal section 28. The latter moves to a slightly reclined position, where the pin 45, secured in the lobe upper of the trapezoidal tie 42, has been moved towards an indentation interposed between the two curved portions of the corrugation groove 61 in the rectangular loop 60 (Figure 7). The elbow tie 63 followed by the displacement of the dorsal section 28 is pushed towards the inside of the dorsal section 28 through the sliding of the pin 65 in the arched slot 44. By means of the lever mechanisms known per se, the movement of the loop elbow 63 leads to the displacement of the cervical section 27 towards a slightly inclined position relative to the dorsal section 28 (Figure 2). The lumbar section 29 is moved downward, after lowering the sacrum section 30 and flipping toward the head of the bed 20 the upper end of the connector arm 62 to which it pivots. The sacrum section 30 moves downward by the push exerted by the user. The femoral section 31 is tilted around the fixed pin of the support 67 towards a slightly inclined position (Figure 8). The movement of the femoral section 31 is due to the rotation, which the conical arm 48 makes around its upper pin, due to the thrust applied by the rear transverse pin 37 in its open slot 73 during the movement of the regulating bar 34.

The rotation of the conical arm 48 has led the pivot pin 69, of the connecting arm 68, to a position between the concave portion and the convex portion in the sinuous groove 47 of the triangular loop 43. The end and foot section 32 is tilted around the pin of the support 72 in order to follow the swinging of the edge of the femoral section 31 to which it is pivoted. The position of the support pin 72 in the longitudinal groove 71 of the plate 70 remains substantially unchanged. Starting from a slightly sinuous position shown in Figure 2, the user can recline the bed sections 20 to obtain the moderately sinuous position shown in Figures 3, 9 and 10, operating the lever 58 and releasing the catch 50 from the second indentation 52 of the bar 34. After this, the user moves the upper part of his body a little further towards the sacrum section 30, or exerts an additional pressure on the sacrum section 30 and releases its supports on the lever 58. The return action of the tension spring 35 and the load applied to the sacrum section 30 lead to a movement of the adjustment rod 34 towards the head of the bed 20.

The retainer 50 of the lever 58, on which at some point the user has released its support, engages with the third indentation 53 of the regulating bar 34 and blocks the movement of the latter (Figure 9). During the movement of the regulating bar 34, the connecting rod 40 has reached an additional elongation of the angle of inclination of the dorsal section 28. The pin 45, secured in the upper lobe of the trapezoidal tie 42, has moved towards the curve shorter of the corrugation groove 61 of the rectangular arm 60. The pin 65 of the elbow tie 63 has moved in the arcuate groove 44 of the trapezoidal tie 42 to a position, which leaves the position of the elbow tie 63 substantially unchanged, so that the inclination on the cervical section 27 relative to the dorsal section 28 consequently also remains unchanged. The lumbar section 29 has been further lowered to follow the downward displacement of the sacrum section 30 and has flipped the upper end of the connector arm 62, to which it is pivoted, additionally towards the head of the bed 20. The femoral section 31 further oscillates around the support pin 67 to assume a moderately reclined position (Figure 10).

The oscillation of the femoral section 31 is driven by the additional rotation of the conical arm 48, which in turn is caused to rotate by the rear transverse pin 37 of the adjustment rod 34, the pin being engaged in its open slot 73. The rotation of the conical arm 48 has moved the pivot pin 69 of the connecting arm 68 towards the convex position of the sinuous groove 47 of the triangular loop 43. The end and leg section 32 has swung around the pin of the support 72 to carry the oscillation of the edge of the femoral section 31 to which it is pivoted. The pin of the support 72 is placed approximately halfway along its path of movement in the longitudinal groove 71 of the plate 70. Starting from the moderately sinuous position shown in Figure 3, the user can recline the sections of the bed 20 towards the sinuous sitting position shown in Figures 4, 11 and 12, by operating the lever 58 and releasing the detent 50 from the third indentation 53 of the bar 34. After this, the user concentrates the weight of his upper body on sacral section 30, or exert an equivalent pressure on sacral section 30, and release its support on lever 58.

The action of the tension spring 35 and the pressure exerted by the user on the sacrum section 30 lead to the displacement of the adjustment rod 34 towards the head of the bed 20. until the catch 50 of the lever 58, on which in a moment the user has released his support, engages in the fourth indentation 54 of the regulation bar 34 and locks the movement of the latter (Figure 11). The front transverse pins 36 of the regulating bar 34 have reached the other stroke limiting end of the guide and front stop grooves 38. During the movement of the regulating rod 34, the connecting rod 40 has led to the dorsal section 38 towards the position of maximum inclination shown in Figure 11. The pin 45, secured in the upper lobe of the trapezoidal tie 42, has been brought towards the other stroke limiting end of the corrugation groove 61 in the rectangular loop 60. pin 65 of the elbow tie 63 has been moved towards the other stroke limiting end of the arcuate groove 44 of the trapezoidal tie 42, leaving unchanged both the elbow tie position 63 and the inclination of the cervical section 27 relative to the back section .

The lumbar section 29 and the sacrum section 30 have been moved further downward, leaving substantially unchanged the position of the connector arm 62, to which the lumbar section 29 is pivoted. The femoral section 31 further swings around the pin of the support 67 until which reaches its position of maximum inclination illustrated in Figure 12. The oscillation of the femoral section 31 is produced by the rotation of the conical arm 48, which in turn is rotated by the rear pin 37 of the regulating bar 34, which has now reached the other stroke limiting end in the respective guide and stop groove 39. The rotation of the conical arm 48 has led to the pivot pin 69 of the connecting arm 68, towards the other end limiting stroke of the groove sinuous 47 in the triangular loop 43. The limb and leg section 32 has followed the oscillating movement of the edge of the femoral section 31, to which it pivots to rotate around the p support roaster 72 until it reaches its maximum inclination position (Figures 4 and 12). The support pin 72 is placed on the other stroke limiting end of the longitudinal groove 71 in the plate 70. From the sinuous sitting position shown in Figure 4, the user can carry the bed sections 20 back to any other of the rest positions, previously described. After the operation of the lever 58 and thus releasing the retainer 50 of the fourth indentation 54 in the adjustment rod 34, the user exerts an appropriate thrust on the cervical section 27, the dorsal section 28 and the lumbar section 29 to produce a rotation in the direction of the bed 20. The connecting rod 40 moves the adjustment bar 34 towards the leg of the bed 20, overcoming the resistance of the tension spring 35. The pins 45 and 65 slide respectively in the groove of undulation 61 of the rectangular loop 60 and in the arched slot 44 of the trapezoidal tie 42, in order to guide the return of the cervical, dorsal and lumbar sections, 27, 28, 29. The rear transverse pins 37 of the regulation bar 34 produce the rotation of the conical arm 48 and the movement of the pin 69 in the sinuous slot 47 of the triangular loop 43. The connecting rod 68 oscillates towards the leg of the bed 20 and moves the femoral section 31 and the section of limb and leg 32 in the downward direction. Once the desired position of the bed 20 has been reached, the user releases his support on the lever 58.

The lever 58 and the corresponding retainer 50 are turned by the torsion spring towards the coupling position with the regulating bar 34 to allow the detent hook 56 to engage that indentation in the regulating bar 34., which corresponds to the position desired by the user. From this description, it is evident that the bed 20 according to the invention achieves the main purpose of providing the traditional electrically controlled bed installations without requiring the use of electromechanical control devices. In addition, the bed 20, according to the invention, makes it possible to substantially reduce the manufacturing and operating costs of this type of reclining bed, eliminating the use of expensive electrical equipment and minimizing service work and possible repair, as is often required for electrically operated beds. Obviously modifications and variations can be made to the bed 20 according to the invention, without departing in this way from the scope of the main features claimed below. For example, instead of the regulation bar 34, the corresponding tension springs 35 and the retaining means (50-58) it is possible to provide manually operated gear units consisting of a worm and a gear. It is also obvious that the bed 20 can be adapted in a simple and economical way to be used by users who are disabled or immobilized for health reasons. In such cases, it is sufficient to connect the aforementioned gear units to an individual, electric gear motor device, which allows the user to change the rest position without varying the weight distribution of the body on the mattress support surface 22.

Claims (6)

1. A bed comprising a support frame, composed of supports connected by longitudinal tubular members and transverse members, a support surface for the mattress, the support surface is composed of a plurality of cross sections articulated between them and the support frame, in such a way that it can be reclinable to a plurality of positions included between two limit positions corresponding to a horizontal coplanar position and a sinuous sitting position, characterized in that position adjustment means are provided, which are slidably housed in the longitudinal members of the frame and move, against the action of the elastic return means, towards a plurality of positions included between the two limit positions defined by the first guide and stop means and corresponding respectively to the horizontal coplanar position and to the position of sitting sinuo As a result of the cross sections of the support surface, retaining means are provided which are continuously pushed by the resilient means, which can be deactivated manually by the user, to engage in stop seats provided on the regulating means and to blocking the sliding of the latter both in the limit positions and in a plurality of positions, which are intermediate in relation to them, at least the cross sections of the support surface, which respectively support the cervical, back parts and femoral body of the user, are articulated to the regulating means with the help of oscillating connecting means, which move to a plurality of positions included between the two limit positions and corresponding respectively to the coplanar position and the position of Sitting sinuous cross sections of the support surface, the cross sections of the support surface, which respectively support the cervical, dorsal, lumbar, femoral and extremity and foot sections of the user's body, are articulated to the support frame with the help of the guide and stop means oscillating elements, which move towards a plurality of positions included between the two limit positions defined by the second guide and stop means and corresponding respectively to the horizontal coplanar position and to the sinuous sitting position of the cross sections of the surface In this case, the cross section of the support surface, which supports the sacrum part of the user's body, is suspended relative to the bed support frame on the transversely articulated axes of the adjacent cross sections for the lumbar and femoral support, the retention means of the regulation means and the section are deactivated manually The cervical transverse, the dorsal cross section and the femoral cross section, which are connected thereto, move towards a plurality of positions included between their limit position by the resulting force system consisting of the action of the return means elastic, regulating means and load, to which the user can variably distribute on the cross sections of the support surface, which are articulated to the regulating means.

2. The bed according to claim 1, further characterized in that the regulating means are composed of bars slidably housed in the longitudinal tubular members of the frame, and the elastic return means are composed of tension springs, of which one end is connected to the head end of the rods and the other end is anchored towards a support of the frame, the first guide and stop means are composed of pairs of transverse pins provided respectively on the front and rear ends of each bar and slideable respectively in pairs of horizontal guide and stop grooves formed in the side walls of each of the longitudinal members of the frame.

3. The bed in accordance with the claims 1 and 2, further characterized in that the retaining means are composed of two seals, which are respectively placed on each longitudinal tubular member of the frame, are connected to a transverse rotation arrow for rotation therewith, and are provided with a hook which guides an opening formed in the upper side of the longitudinal tubular member of the frame, this is capable of engaging in stop indentations, formed on the upper side of the regulating bar, the detents being continuously pushed to rotate towards the position of coupling with the indentations in the bar by means of respective torsion springs and being releasable from the indentations of the bars by means of the manual actuation of a lever connected transversely to the. Rotation arrow of the seals.

4. The bed according to the preceding claims, further characterized in that the oscillating connecting means comprise a bar whose upper end is articulated towards the back support section and whose lower end is articulated on the front transverse pins of the bar coaxially towards a roller slidable in the tubular longitudinal member of the support frame, a triangular loop provided with a sinuous groove and fastened to the frame in the rear horizontal guide and stop grooves for the rear transverse pins of the bar, a conical arm having its upper end pivoted in the upper vertex of the triangular loop and its lower end articulated to the rear transverse pins of the bar by means of an open slot, a rectilinear connector arm having its upper end pivoted on the femoral section and its lower end pivoted with a pivotally pivot pin trailer am bos in the sinuous groove of the triangular loop and a rectilinear longitudinal groove formed in the middle portion of the conical connector arm.

5. The bed according to the preceding claims, further characterized in that the oscillating guide and stop means comprise a trapezoidal loop attached to the bed frame in the front horizontal guide and stop slots for the front transverse pins of the regulating rod and provided with an arched slot and with two transverse pins, respectively secured in the upper and lower parts of the loop, a rectangular loop anchored on the side of the dorsal section in such a way as to project in a cantilever shape towards the adjacent lumbar section, and provided with a corrugation groove, in which the upper transverse pin of the trapezoidal loop slides, an elbow loop slidably connected to the dorsal section and having a curved end exiting towards the lumbar section, and a slidable pin in the arcuate groove trapezoidal tie is able to cooperate with known articulation devices of the section cervical in relation to the dorsal section, the rectilinear connecting arm having its upper end pivoted on the femoral section and its lower end provided with a pivot pin slidably engaged both in the sinuous groove of the triangular loop and in a rectilinear longitudinal groove formed in the middle part of the connecting arm, a support whose lower end is fixed to the longitudinal member of the frame and whose upper end is pivoted on the side of the femoral section, a support, whose lower end is fixed to the longitudinal tubular member of the frame on the leg of the bed and whose upper end is pivoted on the side of the leg and end section in a rectilinear longitudinal groove formed in a longitudinal plate fixed on the side of the leg and end section.

6. The bed according to the preceding claims, further characterized in that the guide and stop means comprise the upper pin, the trapezoidal tie, the pin of the curved end of the cranked tie and the pin of the lower end of the rectilinear connecting arm, which are slidable respectively in the corrugation slot of the rectangular loop, in the arched groove of the trapezoidal loop, and in a sinuous groove of the triangular loop.