CN109198965B

CN109198965B - Mattress support-adjustment device

Info

Publication number: CN109198965B
Application number: CN201710550719.6A
Authority: CN
Inventors: 许连平
Original assignee: Suspa Nanjing Vibration Damping System Co ltd
Current assignee: Su Shibo (Nanjing) vibration damping system Co., Ltd.
Priority date: 2017-07-07
Filing date: 2017-07-07
Publication date: 2020-12-29
Anticipated expiration: 2037-07-07
Also published as: CN109198965A

Abstract

The invention relates to a mattress support-adjustment device, comprising: a hinge device (8) arranged between the base support (1) and the mattress support (5) adjustable with respect to the base support (1) for displacing the mattress support (5) between a use position and an upper position; and a safety device (53) for preventing the mattress support (5) from being undesirably displaced from the upper position to the use position. The safety device (53) comprises: a locking element (54) connected to the base frame (1) and having a plurality of locking elements (55) arranged at a distance from one another for defining a respective mattress frame locking position; and a catch mechanism (56) for lockingly interacting with one of the locking members (55) when the mattress support (5) is undesirably displaced from the upper position to the use position.

Description

Mattress support-adjustment device

Technical Field

The invention relates to a mattress support-adjustment device. Furthermore, the invention relates to a bed part, such as a bed, with at least one such mattress support-adjustment device.

Background

Mattress support-adjustment devices are generally known from the prior art. The following sometimes occur: the mattress support displaced upward suddenly falls back to its position of use, which can lead to serious disability.

Disclosure of Invention

The invention is based on the object of specifying a mattress support adjustment device which is particularly user-friendly and safe. A corresponding bed part is also proposed.

According to the present invention, there is provided a mattress support-adjusting apparatus including: a) a hinge device arranged between a base support, in particular a bed frame, and a mattress support adjustable relative to the base support for displacing the mattress support between a use position and an upper position; and b) a safety device for preventing the mat support from being undesirably displaced from the upper position toward the use position, wherein the safety device has: i) a locking element connected to the base frame, the locking element having a plurality of locking elements arranged at a distance from one another for defining a respective mattress frame locking position; and i i) a detent mechanism for lockingly interacting with at least one of the lock members when the mattress support is undesirably displaced from the upper position toward the use position. According to the invention, a bed is also proposed, with at least one mattress support and adjustment device according to the preceding solution. The object is achieved by the features given in the above-mentioned solution. The core of the invention is that the mattress support adjustment device comprises a safety (locking) device, which can be activated in particular automatically or autonomously, with a locking element and a catch mechanism for the locking interaction with the locking element. The safety device is mechanical. It is particularly safe.

The catch mechanism is preferably adjustable between a locking position for locking the mattress support and a release position for displacing the mattress support.

The locking element is preferably in particular immovably fixed in part on the base body. It is preferably plate-like or bar-like. According to a preferred embodiment, it is fixedly connected to the hinge device.

The locking elements are preferably designed as openings which are arranged separately from one another. Advantageously, the locking members are spaced at different distances from the hinge means.

The safety device is preferably arranged on the hinge device.

The base body is designed in particular as a bed frame or a bed box. The mattress support is preferably a slatted grid which in turn may be locally adjustable or may be non-adjustable.

Further advantageous embodiments of the invention are given below.

According to one embodiment, the catch mechanism has a carriage which, in the inactive locking state of the safety device, can be moved along over the locking element over the locking means. According to this embodiment, the carriage is preferably displaceable in a linearly guided manner. Its spacing from the hinge device or the oscillating arm of the hinge device can preferably be changed during its displacement.

According to one embodiment, the carriage has at least one friction region for temporarily frictionally resting on the locking part. According to this embodiment, at least one friction area is formed, for example, from an elastic material. Thus, static friction can be overcome.

According to said catch mechanism, a steerable pulling element is provided, which is articulated on the pivot arm of the hinge device and is connected to the carriage. According to this embodiment, the pulling element is preferably rod-shaped, plate-shaped or the like. It is preferably rigid. The actuation of the hinge device, for example by displacement of the mattress support, preferably leads to a displacement of the pulling part.

According to one embodiment, at least one insert is connected to the tension element, said insert being inserted into at least one control track in the carriage. According to this embodiment, the at least one insert is preferably pin-shaped or tongue-shaped. It is preferably arranged immovably on the pulling element. Advantageously, it is arranged directly on the pulling member. The at least one control track is preferably slotted. It preferably has at least one straight region. The at least one control track is designed, for example, linearly or endlessly. According to one embodiment, the at least one insert and the at least one control track can be displaced relative to one another at least at times during the actuation of the safety device. According to one embodiment, the at least one control track has a locking region in which the safety device acts in a locked manner, and advantageously the at least one control track has a minimum distance from the locking element. According to one embodiment, the at least one control track has a latch release region for releasing the safety device, in which latch release region the at least one control track advantageously has a maximum distance from the latching arm. According to one embodiment, the at least one control track has a detent lift region for holding the detent mechanism outside of the at least one locking element. According to one embodiment, the at least one control track has a dead zone region in which the displacement of the carriage is stopped if the pulling element displaces. According to one embodiment, the at least one control track has a transfer region for transferring the movement of the pull member to the carriage via the at least one insert for actuating the catch mechanism.

Advantageously, the at least one insert or pulling element and the at least one control rail or carriage are displaced relative to each other when the hinge device or mattress support is manipulated.

When the safety device is activated or functions locked, the displacement of the mattress support is suppressed.

According to one embodiment, the catch mechanism has at least one catch projection which is displaceable relative to the locking means. According to this embodiment, the at least one latching projection is preferably pivotably arranged.

According to one embodiment, the catch mechanism comprises a catch wheel that can be driven in rotation. According to this embodiment, the detent wheel preferably has a locking region and a release region, which are preferably arranged alternately.

According to one embodiment, the catch wheel can be driven in particular in a stepwise manner in rotation by at least one transmission element. According to this embodiment, the at least one transmission element is preferably designed as an elastic element, such as a spring or an elastic material block, or as a rigid, e.g. pivotable element.

Advantageously, the plunger-cylinder device and the hinge device of the mattress support-adjustment apparatus are arranged spaced apart from each other.

The at least one positive elastic member at least partially increases the push-out force of the plunger-cylinder device, thereby facilitating at least partially upward movement of the mattress support. The plunger-cylinder device, and in particular the support mattress support, is spaced relative to the base. The plunger-cylinder device preferably causes an automatic opening of the mattress support, or a corresponding upward movement of the mattress support, after unlocking of the mattress support or of the hinge device for displacing the mattress support. The plunger-cylinder device also preferably enables controlled and comfortable closing or lowering of the mattress support. In particular, the mattress support can be swung relative to the base between a lower use position and an upper flip-up position.

The at least one positive spring element is designed, for example, as an elastic material block or as a spring. It is preferably a compression spring element or a tension spring element.

Advantageously, the at least one positive spring element is prestressed in the use position of the mattress support, with the resultant pushing-out force. Advantageously, in the position of use of the mattress support, the same directed pushing force is also exerted by the respective partial working chambers. Preferably, a fluid or fluid mixture is present in the working chamber. It is particularly preferred that there is a gas, such as air, in the working chamber. Advantageously, the at least one positive spring member acts at least partially in addition to the ejection force from the working chamber.

Advantageously, the at least one positive spring element and the part of the working chamber are at least partially compressed when the housings or housing parts are moved toward one another, with the corresponding ejection force being generated.

Advantageously, the plunger bears sealingly against a wall or a wall portion defining the working chamber. Advantageously, the plunger is crossed by at least one overflow opening or overflow channel which allows the two partial working chambers to communicate with each other. Preferably, there are at least two overflow openings or channels. Advantageously, at least one overflow opening or overflow channel is assigned a shut-off valve.

The housing of the plunger-cylinder device may advantageously vary in its length. Advantageously, the housing parts are substantially hollow-cylindrical and engage in a guided manner.

The working chamber housing is advantageously arranged concentrically in the housing of the plunger-cylinder arrangement.

Drawings

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. Here:

FIG. 1 shows an open bed with a plunger-cylinder arrangement in an ejection position according to the present invention;

FIG. 2 is an enlarged view of FIG. 1 showing the hinge device and plunger-cylinder device and their arrangement on the frame and mattress support;

fig. 3 is a longitudinal section through the plunger-cylinder arrangement shown in fig. 1, 2;

fig. 4 shows, on an enlarged scale, mainly the hinge device shown in fig. 1, in a folded position;

FIG. 5 is a view similar to FIG. 4, also showing the safety device according to the present invention cut away;

FIG. 6 is a top view of the safety device shown in FIG. 5;

figure 7 is a longitudinal section through the safety device shown in figure 6, according to section line VII-VII in figure 6;

FIG. 8 is a side view of the safety device of the present invention according to an alternative second embodiment;

figures 9, 10 are top views of the safety device according to figure 8; and

fig. 11 is a cross-sectional view of a safety device according to an alternative third embodiment of the invention.

Detailed Description

The bed shown in fig. 1 in its entirety comprises a bed frame 1 with a top part 2 and a bottom part 3 and two side parts 4 extending between the top part 2 and the bottom part 3. The bed frame 1 is designed frame-like. The top part 2 and the bottom part 3 extend parallel to each other and at a distance from each other. The lateral members 4 extend perpendicularly to the head member 2 and the foot member 3. They extend spaced apart from one another and are plate-like. The frame 1 can be placed on the floor.

The bed also has a mattress support 5, which is designed as a grid of slats and supports a mattress 6. The mattress support 5 is swingable as a whole between a horizontal use position and an upper flip-up position (fig. 1). In the position of use, it is comfortable to sleep or lie on the mattress 6. In the turned-up position, access is created to the storage compartment 7 laterally delimited by the bed base 1. The mattress support 5 or the mattress 6 then extends obliquely to the horizontal. In the upturned position, the mattress support 5 extends obliquely upward from the top member 2. In the upturned position, the mattress support 5 is preferably angled between 20 ° and 80 °, preferably between 25 ° and 60 °, from the horizontal line.

The bed is substantially symmetrical with respect to a mid-plane extending between the lateral members 4 from the top member 2 to the bottom member 3.

For controlled tilting of the mattress support 5 up and down relative to the bedframe 1, a hinge device 8 is provided on each lateral part 4 adjacent to the head part 2 on the inside, which hinge device also acts on the mattress support 5 laterally adjacent to the head part 2. Furthermore, on each lateral part 4, between the foot part 3 and the hinge device 8, a plunger-cylinder device 9 is provided, which also acts laterally on the mattress support 5 between the hinge device 8 and the foot end 10 of the mattress support 5. The bed comprises in total two hinge devices 8 and two plunger-cylinder devices 9.

Each hinge device 8 forms a mattress support-adjustment device together with an adjacently arranged plunger-cylinder device 9. There are two mattress support-adjustment devices in total.

Each plunger-cylinder device 9 is always arranged spaced apart relative to the adjacent hinge device 8 over the entire displacement path of the mattress support 5 between its use position and the raised position.

The hinge devices 8 are identical in construction. They are arranged opposite to each other. As shown in fig. 2, each hinge device 8 includes a lower first lateral member-fixing member 11 fixed to the corresponding lateral member 4 and an upper first mat support-fixing member 12 fixed to the mat support 5. They are designed as shields (Beschlaege).

Each first lateral member-fixing member 11 is in connection with an assigned first mat support-fixing member 12 through a first connecting arm 13 and a second connecting arm 14. Here, each first connecting arm 13 is hinged to the first lateral part-fixing part 11 and the first mattress support-fixing part 12, while each second connecting arm 14 is hinged to the first lateral part-fixing part 11 and the first mattress support-fixing part 12. These link

arms

13, 14 form oscillating arms.

Between each first lateral member, the fixed member 11, and the first connecting arm 13, there is a first swing axis 15. Between each first mat support-fixing part 12 and the first connecting arm 13, there is a second swinging shaft 16. Between each first lateral member, the fixed member 11, and the second connecting arm 14, there is a third swinging axis 17. Between each first mattress support-fixing part 12 and the second connecting arm 14, there is a fourth swinging shaft 18. The pivot axes 15 to 18 of each hinge device 8 extend at a distance from one another. They extend horizontally. These swing shafts 15 to 18 are provided on the end sides of the connecting

arms

13, 14, respectively. Each hinge device 8 forms a four-joint hinge device 8. It is preferably designed as a crank rocker.

The first connecting arm 13 has a smaller distance from the plug member 2 than the second connecting arm 14.

Each second connecting arm 14 is significantly longer than the first connecting arm 13 of the respective hinge device 8. In particular, each second connecting arm 14 is 1.5 to 2.5 times as long as the first connecting arm 13.

The distance between the second and fourth swing axes 16, 18 on the respective first mattress support-fixing part 12 is significantly shorter than the distance between the first and third swing axes 15, 17 on the respective first lateral part-fixing part 11. In particular, the first and third pivot axes 15, 17 are spaced from each other by a distance 1.5 to 2.5 times as large as the distance of the second and fourth pivot axes 16, 18 from each other.

The hinge device 8 defines a common displacement path for the mattress support 5.

Each plunger-cylinder device 9 is disposed on the corresponding lateral member 4 through the lower second lateral-member fixing member 19 and on the mat support 5 through the upper second mat support-fixing member 20. They are designed as shields.

The lateral part-

fastening parts

11, 19, which are each arranged on the lateral part 4, are arranged separately or spaced apart from one another along the lateral part 4. They have different distances from the plug member 2. The mat support-fixing members 12, 20 provided on the mat support 5 are disposed separately or on the mat support 5 sideways along the mat support 5. They have different distances from the plug member 2.

The second lateral member-securing member 19 is arranged substantially in the middle area of the lateral member 4 between the top member 2 and the bottom member 3. They are offset downwards with respect to the first lateral part, the fixed part 11. The second mat support-fixing member 20 is located substantially in the middle area of the mat support 5 between the top end 21 of the mat support 5 and the bottom end 10 thereof.

In the case of the fifth axis of oscillation 22, each plunger-cylinder device 9 is hinged on the relative second lateral member-fixed member 19. In the case of forming the sixth oscillating shaft 23, each plunger-cylinder device 9 is hinged on the corresponding second mattress support-fixing part 20. The pivot axes 22, 23 run parallel and horizontally to each other. They thus also run parallel to the pivot axes 15 to 18.

Each of the second lateral member-fixing member 19 and the second mat support-fixing member 20 is designed to be elongated. Each second side part-fixing part 19 extends along the adjacent side part 4, and each second mat support-fixing part 20 extends along the longitudinal edge 24 of the mat support 5.

Each second lateral part, the fixing part 19, has a plurality of, for example three, fixing openings 25 which are arranged spaced apart from one another along the respective lateral part 4 and have different horizontal spacings from the adjacent hinge devices 8. It is thus possible to achieve the articulation of the respective plunger-cylinder device 9 in different positions of the lateral part 4.

Each second mattress support-fixing part 20 also has a plurality of, for example, three fixing openings 26 that are arranged spaced apart from each other along the respective longitudinal edge 24 of the mattress support 5 and at different distances from adjacent hinge devices. It is thus possible to achieve the articulation of the respective plunger-cylinder device 9 in different positions of the mattress support 5.

The spacing of the plunger-cylinder arrangement 9 from the adjacent hinge arrangement 8 can thus be adjusted. Depending on the respectively selected articulated position, these plunger-cylinder arrangements 9 can be adapted, for example, to the mattress 6 used in each case, in particular to its weight. A uniform plunger-cylinder device 9 can be used for different mattress supports 5 or mattresses 6.

These plunger-cylinder devices 9 are identical. They are arranged opposite to each other. As shown in fig. 3, each plunger-cylinder device 9 has a housing 27. Each housing 27 comprises a first housing part 28 and a second housing part 29. The

housing parts

28, 29 of each housing 27 engage in one another and are displaceable relative to one another along the longitudinal axis 30 of the plunger-cylinder arrangement 9, while the length of the respective plunger-cylinder arrangement 9 is changed.

Each first housing part 28 is of hollow-cylindrical design and is closed at one end by a first base 31. On each first bottom 31, a first hinge eye 32 is provided on the outside. Each plunger-cylinder device 9 is hinged to the second mattress support-fixing part 20 by means of its first hinge eyelet 32.

Each second housing part 29 is likewise of hollow-cylindrical design and is closed at one end by a second base 33. Each second housing part 29 has an inner diameter which is equal to the outer diameter of the associated first housing part 28. Each second housing part 29 surrounds the associated first housing part 28 at least in regions on the outer circumference. On each second bottom 33, a second hinge eye 34 is provided on the outside, oriented in correspondence with the first hinge eye 32. Each plunger-cylinder arrangement 9 is hinged with its second hinge eye 34 to the second lateral member-fixing part 19. The opposite hinging may alternatively be employed.

In each housing 27 there is a working chamber housing 35 arranged concentrically with respect to the longitudinal axis 30. The working chamber housing 35 is of substantially hollow-cylindrical design and is in particular axially fixed to the first housing part 28. The working chamber housing 35 has a bottom part 36 with a fixing projection 37 which passes through the first bottom 31 and is inserted into the first hinge eye 32, thereby partially fixing the working chamber housing 35 relative to the first housing part 28. Each working chamber housing 35 extends along the longitudinal axis 30 beyond the first housing part 28 and into the second housing part 29. Which extends from the first bottom 31 towards the second bottom 33.

A plunger rod 38 is arranged on each second housing part 29, which extends concentrically with respect to the respective longitudinal axis 30. Each plunger rod 38 has a fixing projection 39 on the end side, which passes through the respective second bottom 33 and is inserted into the second hinge eye 34, whereby the plunger rod 38 is locally, in particular axially, positioned relative to the associated second housing part 29. Each plunger rod 38 extends from the second bottom 33 towards the first bottom 31. Each plunger rod 38 is designed to be shorter than the second housing part 29.

Each plunger rod 38 is guided into the associated working chamber housing 35 via a through opening 79 provided on an end region 41 of the working chamber housing 35 opposite the bottom part 36 or facing the second bottom 33. A guide/sealing device 40 is provided in each working chamber housing 35 adjacent to the through-opening. Each guide/seal device 40 bears sealingly on the outer periphery against the associated plunger rod 38 and guides it. Each guiding/sealing device 40 and the assigned plunger rod 38 are movable relative to each other along the longitudinal axis 30.

A working chamber 42 is spatially delimited by each working chamber housing 35, in which a plunger 43 is displaceably guided along the longitudinal axis 30. Each plunger 43 sealingly abuts against an inner wall 44 of the associated working chamber housing 35 and divides the working chamber 42 into a first partial working chamber 45 adjoining the bottom part 36 and a second partial working chamber 46 adjoining the guiding/sealing device 40. The length or volume of the part of the working

chamber

45, 46 and of the plunger-cylinder arrangement 9 depends on the position of the respective plunger 43. Each plunger 43 has overflow openings 47 extending along the longitudinal axis 30, which communicate with the two partial working

chambers

45, 46. Each plunger rod 38 passes through the second partial working chamber 46. In each working chamber 42 there is gas, whereby the plunger-cylinder arrangement 9 forms a gas spring.

A helical compression spring 48 is disposed in each housing 27 concentrically with the longitudinal axis 30. Each helical compression spring 48 partially surrounds the plunger rod 38 and partially surrounds the working chamber housing 35. Each helical compression spring 48 is located in the housing 27 between the first and

second bases

31, 33. Which is operatively arranged between the two

housing parts

28, 29.

Each first housing part 28 has a contact shoulder 49 arranged concentrically with respect to the longitudinal axis 30, which faces the second bottom 33 and is arranged adjacent to the working chamber housing 35. The contact shoulder 49 is delimited radially outwards by a guide sleeve 50 of the first housing part 28.

In each second housing part 29 there is a compression device 51, which is connected on the inside to the second bottom 33. Each compression device 51 surrounds the assigned plunger rod 38 and has an end-side free contact surface 52 which faces the first bottom 31 or the helical compression spring 48. These helical compression springs 48, when compressed, bear against and exert pressure on the contact shoulder 49 and the contact face 52, as will be described in more detail below.

In order to prevent the mattress support 5 from being undesirably, in particular abruptly, displaced into its lower position of use, which may occur, for example, in the event of failure of at least one plunger-cylinder device 9, according to the embodiment shown, one of the mattress support-adjustment devices has a mechanical safety (locking) device 53. In fig. 1, a mattress support-adjustment device with a safety device 53 is shown, while fig. 2 shows another mattress support-adjustment device. Alternatively, each mattress support-adjustment device has a safety device 53.

In the embodiment according to fig. 5 to 7, the safety device 53 comprises a rigid latching arm 54, which is fixedly connected to the lateral part, namely the fastening part 11, of the hinge device 8. The locking arm 54 forms an obtuse angle with the side part fixing part 11 and extends obliquely downward from the side part fixing part towards the plug part 2. The locking arms 54 are fixed by the lateral part fixing part 11 and are themselves also fixed to the respective lateral part 4. It thus forms to some extent an extension of the lateral part, the fixation part 11. The locking arm 54 and the lateral part, the fastening part 11, are preferably constructed in one piece.

The locking arm 54 has a plurality of, preferably between 5 and 10, separate locking openings 55 thereon, which are arranged at equal distances from one another along the locking arm 54. These latching openings 55 have a different distance from the following lateral component, the fastening component 11.

The safety device 53 further comprises a catch mechanism 56 with a pull arm 57, which is configured as a catch and is articulated on the first connecting arm 13 of the hinge device 8 between the first and second pivot axes 15, 16, forming a seventh pivot axis 58. The seventh swing axis 58 extends horizontally and thus is parallel to the first and second swing axes 15 or 16. The seventh swing shaft 58 is located in the middle region of the first connecting arm 13. Opposite the seventh pivot axis 58, the pull-off arm 57 has a catch projection 59 on the end side.

The latch mechanism 56 also has a box-shaped carriage 60 located on the locking arm 54.

The carriage 60 comprises a sliding mechanism 61 which surrounds the latching arm 54 on the outer periphery side and is displaceable slidably guided along the latching arm. The sliding mechanisms 61 thus define respective locking arm receivers. It has at least one braking or elastic region which acts on or bears against the latching arm 54 and which generates an initial, overcome static friction between the carriage 60 and the latching arm 54. The sliding mechanism 61 is preferably made of an elastic material.

The carriage 60 also has a holder 62 which is in fixed connection with the sliding mechanism 61 and is arranged above the latter. The pulling arm 57 projects into the holder 62.

The holder 62 comprises two vertically oriented holding plates which run parallel to one another and extend at a distance from one another. The jaw section of the puller arm 57 is located between these retaining plates.

An endless slotted control track 63 is formed in each holding plate, which control track opens out into the remaining catch section of the draw-off arm 57. These control tracks 63 are identically constructed and arranged in superposition.

In each control track 63, an insertion pin 64 is inserted from the inside, which is arranged in the catch projection 59 or, adjacent thereto, on the pulling arm 57. These insert pins 64 are aligned with one another and extend laterally outwardly away from one another therefrom. Each insert pin 64 is cylindrical and extends horizontally.

Each control track 63 has an underlying latching region 65 which forms the lowest position of the control track 63 and is arranged in the region of the control track 63 facing away from the first connecting arm 13. Each control track 63 has a minimum spacing from the locking arm 54 in its locking region 65. If the insertion pins 64 are located in the respective locking regions 65, the latching projection 59 is inserted in a locking manner into the adjacent locking opening 55.

Each control track 63 has a latch release area 66 from the locking area 65. Each latch release region 66 extends first from the latching region 65 substantially upward perpendicularly to the latching arm 54 and then extends obliquely upward away from the plug member 2. Each latch release area 66 together forms the uppermost position of the respective control track 63, facing away from the locking area 65. Each control track 63 has a maximum distance there from the locking arm 54.

A catch/lift region 67 is connected to each catch release region 66 or to the highest point of the control track 63, which in turn runs substantially perpendicular to the locking arms 54 or parallel to the initial region of the catch release region 66. The latch projection 59 remains outside the locking opening 55 if the insert pin 64 is located in the corresponding latch-lift region 67.

Connected to each latch-lift region 67 is a dead zone region 68 of the respective control track 63, which extends substantially perpendicularly to the adjacent latch-lift regions 67. The carriage 60 is not first displaced together if the insert pin 64 is located there and the pull arm 57 is displaced.

Connected to each dead zone 68 is a transfer zone 69 of the respective control track 63, which extends from there obliquely downward toward the locking arm 54 and ends in the locking zone 65 of the control track 63.

Each transfer region 69 is assigned a displacement body 70, which is supported on the holder 62.

The following details the displacement of the mat support 5. Here starting from the use position below the mattress support 5.

The mattress support 5 extends horizontally if it is in its position of use. Which is adjacent to the frame 1 along its entire periphery. In particular, the foot end 10 of the mattress support 5 is also arranged adjacent to the foot part 3 of the bedframe 1. The first mat support-fixing member 12 extends substantially horizontally. These plunger-cylinder devices 9 are in their pushed-in position, respectively, and take a minimum length. Each insert pin 64 is located between the detent-lift region 67 and the dead zone region 68 of the respective control track 63 in a curved region, wherein the curved region preferably forms a curve of approximately 90 °.

As already mentioned, the upward movement of the mat support 5 can be achieved. For this purpose, the user applies a corresponding displacement force directed upwards to the mattress support 5. Then, the mattress support 5 undergoes a swinging motion specified by the hinge device 8. The first mat support-fixing part 12 moves away from the header part 2 along the associated first lateral part-fixing part 11. In particular, the angle between the first lateral member, the fixed member 11, and the first connecting arm 13 is reduced. The plunger-cylinder device 9 supports this swinging motion of the mat support 5 upward. On the one hand, the plunger-cylinder arrangement 9 generates a corresponding fluid-like ejection force by its corresponding first partial working chamber 45 toward the longitudinal axis 30. On the other hand, the compressed helical compression spring 48 generates a corresponding mechanical ejection force, which is oriented in the same way as the fluidic ejection force, toward the longitudinal axis 30. In this case, the helical compression spring 48 is supported at least initially both on the contact surface 52 and on the contact shoulder 49. The axial length of the plunger-cylinder arrangement 9 is increased in this case.

By the movement of the second pivot axis 16 away from the plug element 2, the pull arm 57 connected to the first connecting arm 13 is correspondingly moved away from the plug element 2. The insertion pins 64 of the pulling arms 57 are thus likewise in movement together and are moved together away from the plug part 2. In this case, the insert pin 64 runs into the dead zone region 68. In this case, the slide mechanism 61 initially remains stationary on the latch arm 54 due to the initially acting static friction between the slide mechanism 61 and the latch arm 54.

When the insertion pin 64 reaches the transfer region 69 or the curve between the transfer region 69 and the dead zone region 68, the carriage 60 is moved along the latching arm 54 toward the adjacent first pivot axis 15 by a corresponding movement of the pull arm 57.

As soon as the mattress support 5 no longer swings upwards and moves partially downwards at the foot end 10, the traction arms 57 press each insertion pin 64 into the respective locking region 65. Once the insertion pins 64 reach the respective displacement body 70, the displacement body is displaced upwards until the insertion pins 64 can pass the displacement body 70. The displacer 70 then moves back to its initial position again.

When the insertion pins 64 reach the respective locking areas 65, the latch projections 59 are lockingly inserted into the adjacent locking openings 55 from above, thereby stopping the movement of the pulling arm 57 relative to the locking arms 54 and stopping further swinging of the respective first connecting arms 13, thereby also stopping the downward movement of the mattress support 5.

In order to move the latch projection 59 out of the selected locking opening 55, the mattress support 5 needs to be lifted approximately at the foot end 10. This also causes the first connecting arm 13 to move upwards, which causes the insertion pin 64 to be removed from the locking region 65. The insertion pin 64 moves along the latch release area 66, wherein the displacement body 70 prevents the insertion pin 64 from being displaced into the transfer area 69.

Once the mat support 5 is no longer lifted, the first link arm 13 moves downward so that the insert pin 64 slides downward along the click-lifting area 67. In this case, the detent projection 57 is prevented from being inserted in a locking manner into the locking opening 55. The carriage 60 can be moved away from the adjacent connecting arm 13 along the locking arm 54. These plunger-cylinder devices 9 support the closing movement of the mat support 5. They reduce the holding force for holding the mat support 5 when the mat support 5 is transitioned to its use position.

A second embodiment of the safety device will now be described with reference to figures 8 to 10. Like parts are marked with the same reference numerals as the previous embodiments, with particular reference to the description of the previous embodiments. Structurally different, but functionally identical, elements are identified by the same reference numeral with the suffix "a".

Other designs for the detent mechanism 56a are used here as compared to the previous embodiments.

Instead of the catch projection 59, a catch wheel 71 is mounted on the pull-off arm 57a on the end side in a rotatable or rotatably driven manner, which catch wheel comprises a plurality of, in this case four, catch projections 59 a. The detent projections 59a are arranged at equal intervals from each other in the circumferential direction of the detent wheel 71 and project radially outward from the center of the detent wheel 71.

Two slotted control tracks 63a are formed in the holding element 62a, each of which runs in a straight line. They extend obliquely with respect to the locking arm 54 and enclose an angle a of between 30 ° and 80 ° with the latter. These control tracks 63a extend obliquely downwards towards the detent wheel 71.

A transmission element 72, which is designed in the manner of a lever and is movably arranged on the holder 62a, is in transmission connection with the catch wheel 71. Each transmission element 72 can be reset by a return spring 73, which is designed as a helical spring and is arranged on the holder 62 a.

When the mat support 5 is in its use position, the detent projection 59a is disengaged from the locking opening 55. The intermediate chamber of the catch wheel 71 between adjacent catch projections 59a is thus adjacent to the locking opening 55. The carriage 60a is displaceable along the latch arm 54. Thus, the lifting of the mattress support 5 can be achieved.

During the lifting of the mattress support 5, the first connecting arms 13 move together upward, which also results in a corresponding upward movement of the pulling arm 57 a. The restricting spring restricts upward movement of the pulling arm 57 a.

Due to the static friction, the carriage 60a initially does not move together on the locking arm 54. The insert pin 64 is pulled upwards in the control track 63a, which also causes the catch wheel 71 to be lifted correspondingly from the locking arm 54.

The catch wheel 71 then comes into contact with the transmission element 72, which results in a 45 ° pivoting movement of the catch wheel 71. For this purpose, a corresponding transfer lug 74 is provided on the catch wheel 71 in the circumferential region of the catch wheel 71. Now, the pawl wheel 71 is swung in place so that its pawl projection 59a is lockingly inserted into the locking opening 55, once the mattress support 5 has made a downward movement.

Once the mattress support 5 moves from the upper position towards its lower use position, the corresponding first connecting arm 13 presses the pulling arm 57a and the catch wheel 71 downwards along the control track 63 a. Once the insertion pins 64 reach the lower ends of the respective control rails 63a, the catch projections 59a of the catch wheels 71 are lockingly inserted into the locking openings 55, thereby preventing the mattress support 5 from moving downward to its use position.

In order to release this locking, it is again necessary to lift the mattress support 5 slightly at the foot end 10 in order to allow the pawl wheel 71 to swing through 45 ° again by means of the transmission element 72.

Once further lifting of the mat support 5 is stopped, the corresponding first connecting arm 13 moves back again, or moves down, which causes the insertion pin 64 to move down into the control rail 63 a. Once the insert pin 64 reaches the lower end of the control track 63a, the retainer 62a is moved downwardly by the pull arm 57a until the bed is fully closed.

A third embodiment is described below with reference to fig. 11. Like parts are marked with the same reference numerals as the previous embodiments, and reference is made in detail to the description of the previous embodiments. Structurally different, but functionally identical, elements are identified by the same reference numeral followed by the suffix "b".

In contrast to the second embodiment, other designs for the detent mechanism 56b are also used here. The connecting plate 75 is in connection with the pulling arm 57b, which is offset downwards with respect to the pulling arm 57 b. The connecting plate 75 carries two insertion pins 64 on its two mutually opposite main faces, respectively, which are inserted into corresponding control tracks 63b in the carriage 60 b. These control tracks 63b run in a straight line here and parallel to the latching arms 54. The pulling arm 57b is coupled with the carriage 60b by a coupling pin 76. The connecting plate 75 carries the detent wheel 71. The catch wheel 71 is assigned a transmission element 72b, which is articulated on the connecting plate 75. Each transmission member 72b is held by a coupling arm 77, which in turn is loaded by a return spring 73 b.

When the mattress support 5 is in its use position, the catch wheel 71 is oriented or swiveled again, so that the carriage 60b slides along the locking arm 54 without the catch wheel 71 engaging in a locked manner with one of the locking openings 55. Thus, the lifting of the mat support 5 can be achieved.

When the mattress support 5 is lifted, the corresponding first connecting arm 13 swings toward the top member 2, which in turn causes a corresponding movement of the pulling arm 57 b. The pulling arm 57b is thus displaced toward the pulling direction.

As soon as the mattress support 5 is now moved from the raised position downwards towards its use position, the first connecting arm 13 presses against the pulling arm 57b and, via the coupling pin 76, against the carriage 60b on the latching arm 54, out of the head part 2. By this displacement of the carriage 60b on the latching arm 54, the carriage 60b with the push projection 78 projecting towards the foot part 3 causes the coupling arm 77 to swing towards the foot part 3. The transmission member 72b is displaced upwards in this case and causes the pawl wheel 71 to swing through 45 °. The catch wheel 71 is oriented in such a way that the at least one catch projection 59a is inserted in a locked manner into one of the locking openings 55, which results in the mattress support 5 being fixed locally in its current position.

Claims

1. A mattress support-adjustment apparatus, comprising:

a) a hinge device (8) arranged between the base support (1) and the mattress support (5) adjustable relative to the base support (1) for displacing the mattress support (5) between a use position and an upper position; and

b) a safety device (53; 53 a; 53b) for preventing the mattress support (5) from being undesirably displaced from the upper position towards the use position, wherein the safety device (53; 53 a; 53b) comprising:

i) a locking element (54) connected to the base frame (1) and having a plurality of locking elements (55) arranged at a distance from one another for defining a respective mattress frame locking position; and

ii) a catch mechanism (56; 56 a; 56b) for lockingly interacting with at least one locking member (55) when the mattress support (5) is undesirably displaced from the upper position towards the use position,

wherein the catch mechanism (56; 56 a; 56b) has a carriage (60; 60 a; 60b) which can be moved along over the locking element (55) on the locking part (54) in the inactive locking state of the safety device (53; 53 a; 53b),

wherein the catch mechanism (56; 56 a; 56b) comprises a manoeuvrable pull member (57), with which pull member (57) at least one insert (64) is in connection, which insert is inserted into at least one control track (63; 63 a; 63b) in the carriage (60; 60 a; 60 b).

2. Mattress support-adjustment device according to claim 1, characterized in that the carriage (60; 60 a; 60b) has at least one friction area for temporary frictional seating on the locking part (54).

3. Mattress support-adjustment device according to claim 1 or 2, characterized in that the pulling element is hingedly arranged on a swinging arm (13) of a hinge device (8) and is in connection with the carriage (60; 60 a; 60 b).

4. Mattress support-adjustment device according to claim 1, characterized in that the at least one insert (64) and the at least one control rail (63; 63 a; 63b) can be displaced relative to each other in the event of at least a time-dependent manipulation of the safety means (53; 53 a; 53 b).

5. Mattress support-adjustment device according to claim 1, characterized in that the at least one control rail (63; 63 a; 63b) has a locking region (65) in which the safety means (53; 53 a; 53b) are latchingly active and the at least one control rail (63; 63 a; 63b) has a minimum spacing from the locking part (54).

6. Mattress support-adjustment device according to claim 1, characterized in that the at least one control rail (63; 63 a; 63b) has a latch-release area (66) for releasing the safety device (53; 53 a; 53b), in which latch-release area the at least one control rail (63; 63 a; 63b) has the greatest distance from the latching arm (54).

7. Mattress support-adjustment device according to claim 1, characterized in that the at least one control rail (63; 63 a; 63b) has a latch-lifting area (67) for holding the latch mechanism (56; 56 a; 56b) outside of the at least one locking element (55).

8. Mattress support-adjustment device according to claim 1, characterized in that the at least one control track (63; 63 a; 63b) has a dead zone area (68) in which the displacement of the carriage (60; 60 a; 60b) is stopped if the pulling member (57) is displaced.

9. Mattress support-adjustment device according to claim 1, characterized in that the at least one control track (63; 63 a; 63b) has a transfer area (69) for transferring the movement of the pulling member (57) via the at least one insert (64) onto the carriage (60; 60 a; 60b) in order to actuate the catch mechanism (56; 56 a; 56 b).

10. Mattress support-adjustment device according to claim 1 or 2, characterized in that the catch mechanism (56; 56 a; 56b) has at least one catch projection (59; 59a) displaceable relative to the locking part (54).

11. Mattress support-adjustment device according to claim 1 or 2, characterized in that the catch mechanism (56 a; 56b) comprises a catch wheel (71) that can be driven in rotation.

12. Mattress support-adjustment device according to claim 11, characterized in that the catch wheel (71) can be driven in rotation by at least one transmission element (72, 73; 72b, 73 b).

13. A bed with at least one mattress support-adjustment device according to any of the preceding claims.